阅读说明：本技术 电池及具有所述电池的电子装置 (Battery and electronic device with same ) 是由 马武 张国文 于 2020-09-30 设计创作，主要内容包括：一种电池,包括电极组件、电连接所述电极组件的第一极耳和第二极耳、第一壳体、第二壳体和第三壳体。所述第一壳体设有开孔。所述开孔贯穿所述第一壳体。所述第一壳体包括背对所述开孔的外表面。所述第二壳体和所述第三壳体分别设置于所述开孔的两端,并套接于所述外表面。所述第二壳体和所述第三壳体之间电性绝缘。所述第一壳体、所述第二壳体和所述第三壳体共同形成收容所述电极组件、所述第一极耳和所述第二极耳的收容空间。所述第一极耳电连接所述第二壳体,所述第二极耳电连接所述第三壳体。本申请还提供了一种具有所述电池的电子装置。(A battery includes an electrode assembly, first and second tabs electrically connected to the electrode assembly, a first case, a second case, and a third case. The first shell is provided with an opening. The opening penetrates through the first shell. The first housing includes an outer surface facing away from the opening. The second shell and the third shell are respectively arranged at two ends of the opening and are sleeved on the outer surface. The second shell and the third shell are electrically insulated. The first case, the second case, and the third case together form a receiving space that receives the electrode assembly, the first tab, and the second tab. The first pole lug is electrically connected with the second shell, and the second pole lug is electrically connected with the third shell. The application also provides an electronic device with the battery.)

1. A battery comprising an electrode assembly and first and second tabs electrically connected to the electrode assembly, characterized in that: the battery further includes:

the first shell is provided with an opening, the opening penetrates through the first shell, and the first shell comprises an outer surface back to the opening; and

the second shell and the third shell are respectively arranged at two ends of the opening and are sleeved on the outer surface, and the second shell and the third shell are electrically insulated;

the first shell, the second shell and the third shell jointly form a containing space for containing the electrode assembly, the first pole lug and the second pole lug, the first pole lug is electrically connected with the second shell, and the second pole lug is electrically connected with the third shell.

2. The battery of claim 1, further comprising a first seal disposed between the first housing and the second housing and a second seal disposed between the first housing and the third housing.

3. The battery of claim 2, wherein the first seal and the second seal are both a heat shrink material.

4. The battery of any of claims 1-3, wherein the first housing further comprises a first protrusion protruding from the outer surface and positioned between the second housing and the third housing.

5. The battery of claim 4, wherein the first housing further comprises a second tab and a third tab on either side of the first tab, the second housing comprising a first side plate opposite the outer surface, the third housing comprising a second side plate opposite the outer surface, the second tab disposed between the outer surface and the first side plate, the third tab disposed between the outer surface and the second side plate.

6. The battery of claim 5, wherein the second housing further comprises a first extending plate and a first connecting plate, the first extending plate extends from the first side plate toward an end of the third housing, the second protrusion abuts against the first extending plate, the first connecting plate is connected to an end of the first extending plate away from the first side plate and abuts against the outer surface, the third housing further comprises a second extending plate and a second connecting plate, the second extending plate extends from the second side plate toward an end of the second housing, the third protrusion abuts against the second extending plate, and the second connecting plate is connected to an end of the second extending plate away from the first side plate and abuts against the outer surface.

7. The battery according to claim 5 or 6, wherein the cross-sectional shapes of the second and third protrusions are rectangular, trapezoidal, semi-elliptical, or triangular.

8. The battery of any of claims 1-3, wherein the first housing further comprises a second projection disposed between the outer surface and the second housing and a third projection disposed between the outer surface and the third housing.

9. The battery of claim 1, wherein an outer surface of the first housing is electrically insulating.

10. The battery according to claim 1, wherein the first case is made of an insulating material or a first composite material, and the first composite material is a structure in which a conductive layer is sandwiched between insulating layers; the second shell and/or the third shell are made of a conductive material or a second composite material, and the second composite material is a structure in which a conductive layer is sandwiched by an insulating layer.

11. The battery according to claim 9 or 10, wherein the insulating material is at least one of a liquid crystal polymer, p-hydroxybenzaldehyde, polyethylene terephthalate, polyvinyl chloride, polyimide, and acrylonitrile-butadiene-styrene copolymer, and the conductive material is at least one of stainless steel, an aluminum alloy, a copper alloy, and a nickel alloy.

12. The battery of any of claims 1-3, wherein the electrode assembly comprises a first pole piece, a second pole piece, and a separator between the first pole piece and the second pole piece, the first pole piece, the separator, and the second pole piece being laminated or wound to form the electrode assembly.

13. An electronic device, characterized in that the electronic device comprises a battery according to any of claims 1-12.

Technical Field

The present application relates to the field of electrochemistry, and in particular, to a battery and an electronic device having the same.

Background

With the rapid development of science and technology, the functional requirements of consumers for electronic products in life are increasing, and thus, increasingly stringent requirements are placed on batteries as power sources of electronic products. At present, a general battery adopts two metal cases (hereinafter, referred to as a first case and a second case) and a sealing ring to be packaged together as a housing structure of the battery. The first shell is used for loading the battery cell and is electrically connected with the positive lug of the battery cell; the second shell is electrically connected with the negative electrode lug of the battery cell, so that the first shell presents a positive electrode and the second shell presents a negative electrode. However, there are the following problems: (1) the whole shell structure of the battery has polarity, so that the battery has a large short circuit risk; (2) since the entire housing structure of the battery has polarity, the non-connection region of the cell and the housing structure needs to be encapsulated and insulated, which results in a loss of energy density of the battery and an increase in manufacturing cost of the battery.

Disclosure of Invention

Accordingly, there is a need for a battery that reduces the risk of shorting the battery.

The application also provides an electronic device with the battery.

A battery includes an electrode assembly, first and second tabs electrically connected to the electrode assembly, a first case, a second case, and a third case. The first shell is provided with an opening. The opening penetrates through the first shell. The first housing includes an outer surface facing away from the opening. The second shell and the third shell are respectively arranged at two ends of the opening and are sleeved on the outer surface. The second shell and the third shell are electrically insulated. The first case, the second case, and the third case together form a receiving space that receives the electrode assembly, the first tab, and the second tab. The first pole lug is electrically connected with the second shell, and the second pole lug is electrically connected with the third shell.

In one possible embodiment, the battery further includes a first sealing member disposed between the first case and the second case, and a second sealing member disposed between the first case and the third case.

In a possible embodiment, the first seal and the second seal are both heat shrink materials.

In a possible embodiment, the first housing further includes a first protruding portion protruding from the outer surface and located between the second housing and the third housing.

In a possible implementation manner, the first housing further includes a second protruding portion and a third protruding portion respectively located at two sides of the first protruding portion, the second housing includes a first side plate opposite to the outer surface, the third housing includes a second side plate opposite to the outer surface, the second protruding portion is disposed between the outer surface and the first side plate, and the third protruding portion is disposed between the outer surface and the second side plate.

In one possible embodiment, the second housing further includes a first extending plate and a first connecting plate, the first extending plate extends from the first side plate toward one end of the third housing, and the second protruding portion abuts against the first extending plate, the first connecting plate is connected to one end of the first extending plate away from the first side plate and abuts against the outer surface, the third housing further includes a second extending plate and a second connecting plate, the second extending plate extends from one end of the second side plate toward the second housing, and the third protruding portion abuts against the second extending plate, and the second connecting plate is connected to one end of the second extending plate away from the first side plate and abuts against the outer surface.

In a possible embodiment, the cross-sectional shape of the second and third projections is rectangular, trapezoidal, semi-elliptical, or triangular.

In a possible embodiment, the first housing further comprises a second projection disposed between the outer surface and the second housing, and a third projection disposed between the outer surface and the third housing.

In one possible embodiment, the outer surface of the first housing is electrically insulated.

In a possible implementation manner, the first shell is made of an insulating material or a first composite material, and the first composite material is a structure in which an insulating layer is sandwiched by a conductive layer;

the second shell and/or the third shell are made of a conductive material or a second composite material, and the second composite material is a structure in which a conductive layer is sandwiched by an insulating layer. It should be noted that, when the second composite material is selected for the second shell and the third shell, the conductive layer may be different according to the specific charging condition.

In one possible embodiment, the insulating material is at least one of a liquid crystal polymer, p-hydroxybenzaldehyde, polyethylene terephthalate, polyvinyl chloride, polyimide, and acrylonitrile-butadiene-styrene copolymer, and the conductive material is at least one of stainless steel, an aluminum alloy, a copper alloy, and a nickel alloy.

In one possible embodiment, the electrode assembly includes a first pole piece, a second pole piece, and a separator located between the first pole piece and the second pole piece, and the first pole piece, the separator, and the second pole piece are laminated or wound to form the electrode assembly.

An electronic device comprising the battery of any of the above.

The battery in this application will the second casing with the third casing set up respectively in the both ends of trompil to cup joint in the surface of first casing, make with the help of setting up of first casing the second casing with no electron switches on the passageway between the third casing, thereby effectively reduce the short circuit risk.

Drawings

Fig. 1 is a plan view of a battery according to an embodiment of the present application.

FIG. 2 is a schematic sectional view taken along line II-II of FIG. 1.

Fig. 3 is an exploded view of the battery shown in fig. 1.

Fig. 4A is a schematic cross-sectional view of a battery according to another embodiment of the present application.

FIG. 4B is a schematic cross-sectional view of the portion IV shown in FIG. 4A.

Fig. 5 is an exploded view of the battery shown in fig. 4A.

Fig. 6 is a schematic cross-sectional view of a battery according to still another embodiment of the present application.

Fig. 7 is a schematic cross-sectional view of a battery according to yet another embodiment of the present application.

Fig. 8 is an exploded view of the battery of fig. 7.

Fig. 9 is a schematic cross-sectional view of a battery according to yet another embodiment of the present application.

Fig. 10 is a schematic cross-sectional view of a battery according to yet another embodiment of the present application.

Fig. 11 is a schematic cross-sectional view of a battery according to yet another embodiment of the present application.

Fig. 12 is a schematic partial cross-sectional view of a battery according to yet another embodiment of the present application.

Fig. 13 is a schematic partial cross-sectional view of a battery according to yet another embodiment of the present application.

Fig. 14 is a schematic cross-sectional view of a battery according to yet another embodiment of the present application.

Fig. 15 is a top view of a battery according to another embodiment of the present application.

Fig. 16 is a top view of a battery according to yet another embodiment of the present application.

Fig. 17 is a block diagram of an electronic device according to an embodiment of the present application.

Description of the main elements

Battery 10

Electrode assembly 11

First pole piece 111

Diaphragm 112

Second pole piece 113

First tab 12

Second lug 13

First housing 14

Opening 141

Outer surface 142

First protrusion 143

Second projection 144

Third projection 145

Second housing 15

First side plate 151

First base plate 152

First extension plate 153

First connecting plate 154

First accommodation space 155

Third casing 16

Second side plate 161

Second base plate 162

Second extension plate 163

Second connecting plate 164

Second accommodation space 165

Receiving space 17

First seal 18

First seal part 181

First hook 182

Second seal 19

Second seal portion 191

Second hook 192

Electronic device 1

The following detailed description will further illustrate the present application in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Referring to fig. 1, the present embodiment provides a battery 10. Referring to fig. 2 and 3 together, the battery 10 includes an electrode assembly 11, a first tab 12 and a second tab 13 electrically connecting the electrode assembly 11, a first case 14, a second case 15, and a third case 16. The first housing 14 is provided with an opening 141. The opening 141 extends through the first housing 14. The first housing 14 includes an outer surface 142 facing away from the aperture 141. The second shell 15 and the third shell 16 are respectively disposed at two ends of the opening 141, and are sleeved on the outer surface 142. The second housing 15 and the third housing 16 are electrically insulated from each other. The first case 14, the second case 15, and the third case 16 collectively form a receiving space 17 that receives the electrode assembly 11, the first tab 12, and the second tab 13. The first tab 12 is electrically connected to the second case 15. The second tab 13 is electrically connected to the third case 16.

In the battery 10 of the present application, the second casing 15 and the third casing 16 are respectively disposed at two ends of the opening 141, and are sleeved on the outer surface 142 of the first casing 14, so that no electronic conduction channel exists between the second casing 15 and the third casing 16 due to the arrangement of the first casing 14, thereby effectively reducing the risk of short circuit.

In some embodiments, the first housing 14 is made of an insulating material, and the second housing 15 and the third housing 16 are made of a conductive material or a composite material. The composite material includes an insulating material and a conductive material.

Wherein the insulating material is at least one of liquid crystal polymer, p-hydroxybenzaldehyde, polyethylene terephthalate, polyvinyl chloride, polyimide and acrylonitrile-butadiene-styrene copolymer. The conductive material is at least one of stainless steel, aluminum alloy, copper alloy and nickel alloy.

According to an embodiment of the present disclosure, the first housing 14 is made of a first composite material, which is a structure in which an insulating layer is sandwiched by a conductive layer. According to another embodiment of the present application, the material of the second shell 15 is a second composite material, and the second composite material is a structure in which a conductive layer is sandwiched by an insulating layer; accordingly, the third housing 16 may be made of a second composite material, which is different from the first composite material. According to the embodiment of the present application, in the second composite material of the second shell 15 and the third shell 16, the conductive layers of the two can be made of different conductive materials according to their charging characteristics.

In another embodiment, the first casing 14 is made of a composite material, and the second casing 15 and the third casing 16 are made of a conductive material or a composite material. The material of the portion of the first casing 14 in contact with the second casing 15 and the third casing 16 is an insulating material, and the material of the remaining portion of the second casing 15 is a conductive material or a composite material. At least a portion of the second housing 15 electrically connected to the first tab 12 is made of a conductive material, the rest of the second housing 15 is made of an insulating material, a conductive material or a composite material, at least a portion of the third housing 16 electrically connected to the second tab 13 is made of a conductive material, and the rest of the second housing 15 is made of an insulating material, a conductive material or a composite material.

In still other embodiments, the first housing 14 is made of a composite material, and the second housing 15 and the third housing 16 are made of a conductive material or a composite material. The material of the portion of the first casing 14 in contact with the second casing 15 and the third casing 16 is a conductive material, the material of the rest of the second casing 15 is an insulating material or a composite material, the material of the portion of the second casing 15 and the third casing 16 in contact with the first casing 14 is an insulating material, and the material of the rest of the second casing 15 and the third casing 16 is a conductive material or a composite material.

In some embodiments, the first tab 12 and the second housing 15 are electrically connected by laser welding, resistance welding, or ultrasonic welding. The second lug 13 and the third shell 16 are electrically connected by laser welding, resistance welding or ultrasonic welding.

It is understood that the battery 10 further includes an electrolyte (not shown) accommodated in the accommodating space 17.

In some embodiments, referring to fig. 2 and 3, the electrode assembly 11 is completely accommodated in the opening 141, that is, the first case 14 has a ring-shaped wall structure which is disposed around the electrode assembly 11 or the first case 14 includes upper and lower substantially parallel surfaces, and the opening 141 penetrates the upper and lower surfaces. Compared with the conventional battery in which the non-connection region between the battery cell and the housing structure needs to be encapsulated and insulated due to the polarity of the entire housing structure, the battery 10 in the present application accommodates the electrode assembly 11 in the opening 141 of the first case 14, and due to the electrical insulation characteristics between the first case 14 and the second case 15 and between the first case 14 and the third case 16, the electrode assembly 11 does not cause a short circuit of the battery 10 even if contacting the first case 14, so that the battery 10 in the present application does not need to perform an additional encapsulation and insulation treatment on the electrode assembly 11, thereby improving the energy density of the battery 10 and reducing the manufacturing cost of the battery 10.

In some embodiments, referring to fig. 4A, 4B, and 5, the cell 10 further includes a first seal 18 and a second seal 19. The first seal 18 is disposed between the first housing 14 and the second housing 15. The second seal 19 is disposed between the first housing 14 and the third housing 16. In this way, through the arrangement of the first sealing member 18 and the second sealing member 19, interference seals are formed between the second casing 15 and the first casing 14, and between the third casing 16 and the first casing 14, so that impurities such as external moisture are effectively prevented from entering the battery 10, and leakage of the battery 10 can be effectively prevented.

Wherein the first seal 18 and the second seal 19 are both heat shrink materials. The heat shrinkable material is not limited to one or more of polypropylene, polyamide, fluororubber, polyester resin, meltable polytetrafluoroethylene, polyimide, polyphenylene oxide, and fluorinated ethylene propylene copolymer.

In some embodiments, referring to fig. 6, the first housing 14 further comprises a first projection 143. The first protrusion 143 is protruded from the outer surface 142 and is located between the second housing 15 and the third housing 16. Wherein, the first protrusion 143 is provided to reinforce the strength of the first housing 14. In addition, the first protrusion 143 may also be used to space the second housing 15 and the third housing 16 to prevent the second housing 15 and the third housing 16 from contacting each other and causing a short circuit.

In a further embodiment, referring to fig. 7 and 8, the first housing 14 further includes a second protrusion 144 and a third protrusion 145 located on both sides of the first protrusion 143, respectively. The second housing 15 includes a first side plate 151 opposite the outer surface 142. The third housing 16 includes a second side plate 161 opposite the outer surface 142. The second protrusion 144 is disposed between the outer surface 142 and the first side plate 151. The third protrusion 145 is disposed between the outer surface 142 and the second side plate 161. It is understood that in other embodiments, referring to fig. 10, the first protrusion 143 may be omitted. As such, the outer surface 142 is provided with only the second projection 144 and the third projection 145.

In other embodiments, referring to fig. 9, the second housing 15 further includes a first extending plate 153 and a first connecting plate 154. The first extending plate 153 extends from the first side plate 151 toward one end of the second side plate 161, and the second protrusion 144 abuts against the first extending plate 153. The first connecting plate 154 is connected to an end of the first extending plate 153 away from the first side plate 151 and abuts against the outer surface 142. The third housing 16 further includes a second extension plate 163 and a second connection plate 164. The second extending plate 163 extends from the second side plate 161 toward one end of the first side plate 151, and the third protrusion 145 abuts against the second extending plate 163. The second connecting plate 164 is connected to an end of the second extending plate 163 away from the second side plate 161 and abuts against the outer surface 142. It can be understood that the position of the second housing 15 is defined by the cooperation of the second protrusion 144 with the first extension plate 153 and the first connection plate 154, so that the problem of outward sliding of the second housing 15 after being assembled to the first housing 14 is effectively prevented. Similarly, the position of the third housing 16 is defined by the cooperation of the third protrusion 145 with the second extension plate 163 and the second connection plate 164, so that the problem of outward sliding of the third housing 16 after being assembled to the first housing 14 is effectively prevented.

The longitudinal cross-sectional shape of the second protruding portion 144 is not limited to a rectangle, a trapezoid, a semi-ellipse, or a triangle. The longitudinal sectional shape of the third protrusion 145 is not limited to a rectangle, a trapezoid, a semi-ellipse, or a triangle.

In some embodiments, referring to fig. 2, the electrode assembly 11 includes a first pole piece 111, a separator 112, and a second pole piece 113. The diaphragm 112 is located between the first pole piece 111 and the second pole piece 113. The first pole piece 111, the separator 112, and the second pole piece 113 are wound to form the electrode assembly 11. In other embodiments, the first pole piece 111, the separator 112, and the second pole piece 113 may be laminated to form the electrode assembly 11.

The battery 10 of the present application will be specifically described below by way of examples.

Example 1

Referring to fig. 1, 2 and 3, a battery 10 includes an electrode assembly 11, a first tab 12 and a second tab 13 electrically connecting the electrode assembly 11, a first case 14, a second case 15 and a third case 16.

Referring to fig. 3, the first housing 14 is provided with an opening 141. The opening 141 extends through the first housing 14. In embodiment 1, the opening 141 has a circular shape. The first housing 14 is circular in cross-section. In other embodiments, the shape of the opening 141 can also be an oval, polygonal, etc. regular shape or other irregular shape. The cross-section of the first housing 14 may also be oval, polygonal, etc. regular or other irregular shapes. Wherein the polygon is not limited to a triangle, a quadrangle, etc.

Referring to fig. 2 and 3, the first housing 14 includes an outer surface 142 facing away from the opening 141. The second shell 15 and the third shell 16 are respectively disposed at two ends of the opening 141, and are sleeved on the outer surface 142. In this way, the first case 14, the second case 15, and the third case 16 collectively form a receiving space 17 that receives the electrode assembly 11, the first tab 12, and the second tab 13. It is understood that the battery 10 further includes an electrolyte (not shown) accommodated in the accommodating space 17.

Specifically, in embodiment 1, referring to fig. 2 and 3, the second housing 15 includes a first side plate 151 and a first bottom plate 152. The first side plate 151 is disposed around the periphery of the first bottom plate 152 to form a first accommodating space 155 together with the first bottom plate 152. The third casing 16 includes a second side plate 161 and a second bottom plate 162. The second side plate 161 is disposed around the periphery of the second bottom plate 162 to form a second accommodating space 165 together with the second bottom plate 162. In this way, one end of the first housing 14 having the opening 141 is accommodated in the first accommodating space 155, and the other end of the first housing 14 having the opening 141 is accommodated in the second accommodating space 165. Wherein the second housing 15 and the first housing 14 are in interference fit, and the third housing 16 and the first housing 14 are in interference fit. Then, after one end of the first casing 14 having the opening 141 is accommodated in the first accommodating space 155, and the other end of the first casing 14 having the opening 141 is accommodated in the second accommodating space 165, the first side plate 151 directly abuts against the outer surface 142 of the first casing 14, and the second side plate 161 directly abuts against the outer surface 142 of the first casing 14, so that the second casing 15 and the third casing 16 are respectively and hermetically connected to the first casing 14, thereby effectively preventing impurities such as external moisture from entering the battery 10, and effectively preventing the leakage of the battery 10.

In embodiment 1, the second housing 15 and the third housing 16 are hermetically connected to the first housing 14 by a press-fit process.

In embodiment 1, referring to fig. 3, the first bottom plate 152 and the second bottom plate 162 are each circular in shape. It is understood that in other embodiments, referring to fig. 15 and 16, the shapes of the first bottom plate 152 and the second bottom plate 162 can be adapted according to the shape of the cross section of the first housing 14, and can also be regular shapes such as an ellipse, a polygon, or other irregular shapes. Wherein the polygon is not limited to a triangle, a quadrangle, etc.

In embodiment 1, referring to fig. 2 and 3, the electrode assembly 11 is completely received in the opening 141. Compared with the conventional battery in which the entire housing structure has polarity, and therefore the non-connection region between the battery core and the housing structure needs to be encapsulated and insulated, in the battery 10 in this embodiment 1, the electrode assembly 11 is accommodated in the opening 141 of the first case 14, and due to the electrical insulation characteristics between the first case 14 and the second case 15 and between the first case 14 and the third case 16, the electrode assembly 11 does not cause a short circuit of the battery 10 even if contacting the first case 14, so that the battery 10 in this embodiment 1 does not need to perform an additional encapsulation and insulation treatment on the electrode assembly 11, thereby increasing the energy density of the battery 10 and reducing the manufacturing cost of the battery 10.

Referring to fig. 2, the electrode assembly 11 includes a first pole piece 111, a separator 112, and a second pole piece 113. The diaphragm 112 is located between the first pole piece 111 and the second pole piece 113. The first pole piece 111, the separator 112, and the second pole piece 113 are wound to form the electrode assembly 11. The first pole piece 111 is electrically connected to the first tab 12, and the second pole piece 113 is electrically connected to the second tab 13.

The material of the second housing 15 and the material of the third housing 16 are conductive materials or composite materials. The composite material includes a conductive material and an insulating material. Wherein the insulating material is at least one of liquid crystal polymer, p-hydroxybenzaldehyde, polyethylene terephthalate, polyvinyl chloride, polyimide and acrylonitrile-butadiene-styrene copolymer. The conductive material is at least one of stainless steel, aluminum alloy, copper alloy and nickel alloy.

In embodiment 1, the material of the second casing 15 and the material of the third casing 16 are both conductive materials. At this time, the first tab 12 is electrically connected to the first base plate 152 of the second case 15, and the second tab 13 is electrically connected to the second base plate 162 of the third case 16. In this way, the second case 15 and the third case 16 are respectively used as external electrical connection terminals of the battery 10, so that the polarities of the first pole piece 111 and the second pole piece 113 in the electrode assembly 11 are led out by the second case 15 and the third case 16.

In some embodiments, the second casing 15 is made of a composite material, and the third casing 16 is made of a conductive material. The material of part of the first bottom plate 152 is a conductive material, the material of the remaining part of the first bottom plate 152 is an insulating material or a composite material, and the material of the first side plate 151 is a conductive material, an insulating material or a composite material. At this time, the first tab 12 is electrically connected to the region made of the conductive material in the first base plate 152, and the second tab 13 is electrically connected to the second base plate 162.

In other embodiments, the second casing 15 is made of a conductive material, and the third casing 16 is made of a composite material. The material of part of the second base plate 162 is a conductive material, the material of the remaining part of the second base plate 162 is an insulating material or a composite material, and the material of the second side plate 161 is a conductive material, an insulating material or a composite material. At this time, the first tab 12 is electrically connected to the first base plate 152, and the second tab 13 is electrically connected to the region made of the conductive material in the second base plate 162.

In still other embodiments, the material of the second casing 15 and the material of the second casing 16 are both composite materials. The material of part of the first bottom plate 152 is a conductive material, the material of the remaining part of the first bottom plate 152 is an insulating material or a composite material, and the material of the first side plate 151 is a conductive material, an insulating material or a composite material. Part of the second base plate 162 is made of a conductive material, the rest of the second base plate 162 is made of an insulating material or a composite material, and the second side plate 161 is made of a conductive material, an insulating material or a composite material. At this time, the first tab 12 is electrically connected to the region made of the conductive material in the first base plate 152, and the second tab 13 is electrically connected to the region made of the conductive material in the second base plate 162.

In embodiment 1, when the material of the second housing 15 and the material of the third housing 16 are conductive materials, both the second housing 15 and the third housing 16 may be formed by a stamping process. It is understood that the angle between the first side plate 151 and the first bottom plate 152 is not less than 90 °, thereby facilitating the stamping and demolding of the second housing 15 and facilitating the assembly of the second housing 15 to the first housing 14. Similarly, the angle between the second side plate 161 and the second bottom plate 162 is not less than 90 °, so that the stamping and demolding of the third housing 15 are facilitated, and the assembly of the third housing 15 to the first housing 14 is facilitated.

In embodiment 1, the first housing 14 is made of an insulating material. Wherein, the first housing 14 can be prepared by an injection molding process.

In some embodiments, the first housing 14 is made of a composite material. On the premise of ensuring electrical insulation between the first housing 14 and the second housing 15, and between the first housing 14 and the third housing 16, the first housing 14 is not limited to a composite structure with an inner layer made of an insulating material and an outer layer made of a conductive material, a composite structure with an outer layer made of an insulating material and an inner layer made of a conductive material, a composite structure with an upper portion and a lower portion made of an insulating material and a middle portion made of a conductive material, and a composite structure with an upper portion and a lower portion made of a conductive material and a middle portion made of an insulating material. Wherein the outer layer is the region of the outer surface 142, and the inner layer is the first housing 14 facing away from the remainder of the outer layer. The upper portion is a portion of the first housing 14 connected to the second housing 15, the lower portion is a portion of the first housing 14 connected to the third housing 16, and the middle portion is a portion of the first housing 14 connected between the upper portion and the lower portion.

In embodiment 1, the second casing 15 and the third casing 16 sleeved on the outer surface 142 of the first casing 14 are spaced apart from each other to prevent the second casing 15 and the third casing 16 from short-circuiting due to contact.

The process flow of the battery 10 will be briefly described below.

The method comprises the following steps: the first housing 14 is placed on a platform fixture (not shown) and secured.

Step two: the second casing 15 is placed over the first casing 14, and the second casing 15 is pressed to sleeve the second casing 15 on the outer surface 142 of the first casing 14.

Step three: the electrode assembly 11 is placed in the assembled first and second cases 14 and 15 while the electrode assembly 11 is pressed by a pressing block (not shown) so that the first tab 12 and the first base plate 152 of the second case 15 are tightly pressed.

Step four: the first tab 12 and the first base plate 152 are joined together by means of laser welding. Wherein, the surface of the first base plate 152 is flat, so as to ensure the welding reliability of the first tab 12 and the first base plate 152.

Step five: placing the third housing 16 on a lower fixing fixture (not shown), bending the second pole ear 13 to the second bottom plate 162 of the third housing 16, and tightly pressing the second pole ear 13 and the second bottom plate 162 by means of a pressing block (not shown);

step six: the second pole ear 13 and the second base plate 162 are joined together by means of laser welding. The surface of the second base plate 162 is flat, so as to ensure the reliability of the welding between the second pole ear 13 and the second base plate 162.

Step seven: the third shell 16 is placed over the first shell 14, and the third shell 16 is pressed to fit the third shell 16 over the outer surface 142 of the first shell 14. Wherein the second housing 15 and the first housing 14 are in interference fit, and the third housing 16 and the first housing 14 are in interference fit, so that the second housing 15 and the third housing 16 are respectively in sealing connection with the first housing 14.

Example 2

Embodiment 2 differs from embodiment 1 in that the battery 10 in embodiment 2 further includes a first sealing member 18 and a second sealing member 19.

In embodiment 2, referring to fig. 4A, 4B, and 5, the first seal 18 is provided between the first housing 14 and the second housing 15. The second seal 19 is disposed between the first housing 14 and the third housing 16. Wherein the second housing 15 and the first housing 14 are respectively in interference fit with the first sealing member 18, and the third housing 16 and the first housing 14 are respectively in interference fit with the second sealing member 19.

It can be understood that the surface of the second casing 15 and the surface of the third casing 16 need to control the size of the burr to be not more than 0.01mm, so as to prevent the burr from scraping the first sealing member 18 and/or the second sealing portion 19 to form a leakage channel. Furthermore, the transition of the first housing 14, for example: the transition between the side surface and the end surface of the first case 14 is made at an angle R, so that the first density member 18 and the second sealing member 19 are easily assembled to the first case 14, and the electrode assembly 11 is prevented from being scratched when the first case 14 and the electrode assembly 11 are assembled. Wherein the angle between the side surface and the end surface of the first housing 14 is not less than 90 °, thereby facilitating the assembly of the first density member 18 and the second seal member 19 to the first housing 14.

Specifically, referring to fig. 4B and 5, the first sealing element 18 includes a first sealing portion 181 and a first hook portion 182. The first sealing portion 181 is disposed between the outer surface 142 and the first side plate 151. The first hook 182 extends from an end of the first sealing 181 away from the third housing 16, and bends toward the opening 141. The second sealing member 19 includes a second sealing portion 191 and a second hook portion 192. The second sealing portion 191 is disposed between the outer surface 142 and the second side plate 161. The second hook 192 extends from an end of the second sealing portion 191 away from the second housing 15, and bends toward the opening 141.

It can be understood that, in the process of sleeving the second casing 15 on the first casing 14, the second casing 15 continuously presses the first sealing element 18, so that the first sealing element 18 moves towards the third casing 16 and falls off, and the first hook 182 hooks the first sealing element 18 at one end of the first casing 14, so as to effectively avoid the problem that the first sealing element 18 falls off due to the second casing 15 pressing the first sealing element 18. Similarly, in the process of sleeving the third casing 16 on the first casing 14, the third casing 16 continuously extrudes the second sealing member 19, so that the second sealing member 19 moves towards the second casing 15 and falls off, and the second hook 192 is arranged so that the second sealing member 19 hooks the other end of the first casing 14, thereby effectively avoiding the problem that the second sealing member 19 falls off due to the third casing 16 extruding the second sealing member 19.

In embodiment 1, the joints between the first seal member 18 and the first housing 14 and the joints between the second seal member 19 and the first housing 14 may also be subjected to electric discharge machining to further improve the sealing performance between the first seal member 18 and the first housing 14 and between the second seal member 19 and the first housing 14.

In embodiment 1, the first seal member 18 and the second seal member 19 are integrally formed.

In another embodiment, an end of the first sealing portion 181 away from the first hook 182 and an end of the second sealing portion 191 away from the second hook 192 are connected together. In this case, the first seal member 18 and the second seal member 19 together constitute a unitary structure.

In another embodiment, the first hook 182 and the second hook 192 may be omitted. That is, the first seal 18 includes only the first seal portion 181, and the second seal 19 includes only the second seal portion 191.

In embodiment 2, the cross-sectional shapes of the first seal member 18 and the second seal member 19 are both circular. It is understood that in other embodiments, the shape of the cross-section of the first sealing member 18 and the second sealing member 19 can be adapted according to the shape of the cross-section of the first housing 14, and can also be an oval, polygonal, etc. regular shape or other irregular shape.

Wherein the first seal 18 and the second seal 19 are not limited to forming a tight connection with the first housing 14 by mechanical nesting, injection molding, heat shrinking, etc.

Example 3

Embodiment 3 differs from embodiment 2 in that the first housing 14 in embodiment 3 further includes a first projection 143 that is provided to protrude from the outer surface 142.

In embodiment 3, referring to fig. 6, the first protrusion 143 is annularly provided to the outer surface 142. Wherein the second housing 15 and the third housing 16 are respectively disposed at two sides of the first protrusion 143.

In embodiment 3, the first projection 143 has a rectangular longitudinal section. In other embodiments, the shape of the longitudinal section of the first protruding portion 143 is not limited to a regular shape such as a semi-ellipse or other irregular shapes.

Example 4

Embodiment 4 differs from embodiment 3 in that the first housing 14 in embodiment 4 further includes a second projecting portion 144 and a third projecting portion 145 projecting from the outer surface 142.

In embodiment 4, referring to fig. 7 and 8, the second protrusion 144 and the third protrusion 145 are annularly provided to the outer surface 142. The second protrusion 144 is disposed between the first side plate 151 and the outer surface 142, and between the first seal 18 and the first protrusion 143. The third protrusion 145 is disposed between the second side plate 161 and the outer surface 142, and between the second sealing portion 191 and the first protrusion 143.

It will be appreciated that the second projection 144 can be configured to define the position of the first seal member 18 and the third projection 145 can be configured to define the position of the second seal member 191.

In embodiment 4, referring to fig. 7, the longitudinal sections of the second projection 144 and the third projection 145 are elliptical. It is understood that in other embodiments, referring to fig. 12 and 13, the longitudinal cross-sectional shape of the second projecting member 144 is not limited to being rectangular, or trapezoidal. The longitudinal sectional shape of the third protrusion 145 is not limited to a rectangle or a trapezoid.

Example 5

Embodiment 5 differs from embodiment 4 in the structure of the second casing 15 and the third casing 16.

In embodiment 5, referring to fig. 9, the second housing 15 further includes a first extending plate 153 and a first connecting plate 154. The first extending plate 153 extends from the first side plate 151 toward one end of the second side plate 161, and the second protrusion 144 abuts against the first extending plate 153. The first connecting plate 154 is connected to an end of the first extending plate 153 away from the first side plate 151 and abuts against the outer surface 142. The third housing 16 further includes a second extension plate 163 and a second connection plate 164. The second extending plate 163 extends from the second side plate 161 toward one end of the first side plate 151, and the third protrusion 145 abuts against the second extending plate 163. The second connecting plate 164 is connected to an end of the second extending plate 163 away from the second side plate 161 and abuts against the outer surface 142.

It can be understood that the position of the second housing 15 is defined by the cooperation of the second protrusion 144 with the first extension plate 153 and the first connection plate 154, so that the problem of outward sliding of the second housing 15 after being assembled to the first housing 14 is effectively prevented. Similarly, the position of the third housing 16 is defined by the cooperation of the third protrusion 145 with the second extension plate 163 and the second connection plate 164, so that the problem of outward sliding of the third housing 16 after being assembled to the first housing 14 is effectively prevented.

Example 6

Embodiment 6 differs from embodiment 2 in that the first housing 14 in embodiment 6 further includes a second projecting portion 144 and a third projecting portion 145 projecting from the outer surface 142.

In embodiment 6, referring to fig. 10, the second protrusion 144 and the third protrusion 145 are annularly provided to the outer surface 142. The second protrusion 144 is disposed between the first side plate 151 and the outer surface 142. The third protrusion 145 is disposed between the second side plate 161 and the outer surface 142.

Example 7

Embodiment 7 differs from embodiment 6 in the structure of the second casing 15 and the third casing 16.

In embodiment 7, referring to fig. 11, the second housing 15 further includes a first extending plate 153 and a first connecting plate 154. The first extending plate 153 extends from the first side plate 151 toward one end of the second side plate 161, and the second protrusion 144 abuts against the first extending plate 153. The first connecting plate 154 is connected to an end of the first extending plate 153 away from the first side plate 151 and abuts against the outer surface 142. The third housing 16 further includes a second extension plate 163 and a second connection plate 164. The second extending plate 163 extends from the second side plate 161 toward one end of the first side plate 151, and the third protrusion 145 abuts against the second extending plate 163. The second connecting plate 164 is connected to an end of the second extending plate 163 away from the second side plate 161 and abuts against the outer surface 142.

It can be understood that the position of the second housing 15 is defined by the cooperation of the second protrusion 144 with the first extension plate 153 and the first connection plate 154, so that the problem of outward sliding of the second housing 15 after being assembled to the first housing 14 is effectively prevented. Similarly, the position of the third housing 16 is defined by the cooperation of the third protrusion 145 with the second extension plate 163 and the second connection plate 164, so that the problem of outward sliding of the third housing 16 after being assembled to the first housing 14 is effectively prevented.

Example 8

Embodiment 8 differs from embodiment 1 in that the first housing 14 in embodiment 8 further includes a first projection 143 that is provided to protrude from the outer surface 142.

In embodiment 8, referring to fig. 14, the first protrusion 143 is annularly provided to the outer surface 142. Wherein the second housing 15 and the third housing 16 are respectively disposed at two sides of the first protrusion 143.

In embodiment 8, the first projection 143 has a rectangular longitudinal section. In other embodiments, the shape of the longitudinal section of the first protruding portion 143 is not limited to a regular shape such as a semi-ellipse or other irregular shapes.

Example 9

Example 9 differs from example 4, example 5, example 6, or example 7 in that the cell 10 in example 9 does not have the first seal member 18 and the second seal member 19.

In embodiment 9, the design of the battery 10 without the first sealing member 18 and the second sealing member 19 reduces the assembly of the first sealing member 18 and the second sealing member 19 with the first housing 14, which greatly reduces the manufacturing cost of the battery 10, thereby effectively improving the product competitiveness of the battery 10.

Referring to fig. 17, the present application further provides an electronic device 1. The electronic device 1 includes the battery 10 described above. The electronic device 1 includes the battery 10. The electronic device 1 may be a mobile electronic device, an energy storage device, an electric vehicle, a hybrid electric vehicle, or the like. The mobile electronic device may be a mobile phone, a wearable electronic device, a tablet computer, a notebook computer, or the like.

Although the present application has been described in detail with reference to preferred embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the spirit and scope of the present application.