阅读说明：本技术 连接件、电池单体和电池包 (Connecting piece, battery monomer and battery package ) 是由 周龙 吴聪苗 郭敏 蓝金花 于 2021-07-14 设计创作，主要内容包括：本发明公开了一种连接件、电池单体和电池包,所述连接件用于通过超声波焊接与集流体的多层极耳相连,所述连接件包括：连接板和设于所述连接板上的凸起,所述凸起凸出于所述连接板在厚度方向的其中一侧表面,所述凸起包括多个,多个所述凸起穿过多层所述极耳,多个所述凸起在超声波振动方向上排列的密集程度大于除超声波振动方向外的其他方向的密集程度。根据本发明的连接件,通过在连接件上设置在超声波振动方向上排列的密集程度大于除超声波振动方向外的其他方向的密集程度的多个凸起,提升了极耳与连接件之间的焊接速度,减少了制作工时,降低了电池单体的生产成本,提高了电池包的生产效率。(The invention discloses a connecting piece, a battery monomer and a battery pack, wherein the connecting piece is used for being connected with a multilayer tab of a current collector through ultrasonic welding, and the connecting piece comprises: the connecting plate with locate arch on the connecting plate, protruding protrusion in one of them side surface of connecting plate in thickness direction, the arch includes a plurality ofly, and is a plurality of the multilayer is passed to the arch utmost point ear, and is a plurality of the intensive degree that the arch was arranged on the ultrasonic vibration direction is greater than the intensive degree of other directions except the ultrasonic vibration direction. According to the connecting piece, the plurality of bulges which are arranged in the ultrasonic vibration direction and have the density degree larger than that of the bulges arranged in other directions except the ultrasonic vibration direction are arranged on the connecting piece, so that the welding speed between the lug and the connecting piece is increased, the manufacturing working hour is reduced, the production cost of a battery monomer is reduced, and the production efficiency of a battery pack is improved.)

1. A connector for connection to a multi-layer tab of a current collector by ultrasonic welding, the connector comprising: the connecting plate with locate arch on the connecting plate, protruding protrusion in one of them side surface of connecting plate in thickness direction, the arch includes a plurality ofly, and is a plurality of the multilayer is passed to the arch utmost point ear, and is a plurality of the intensive degree that the arch was arranged on the ultrasonic vibration direction is greater than the intensive degree of other directions except the ultrasonic vibration direction.

2. The connecting member according to claim 1, wherein a density of arrangement of the plurality of projections in a direction perpendicular to the ultrasonic vibration direction is smaller than a density of arrangement in a direction other than the direction perpendicular to the ultrasonic vibration direction.

3. The connector according to claim 1, wherein a plurality of the protrusions are arranged in an array on a surface of the connection plate, and a density of the arrangement of the plurality of the protrusions is the largest in a direction along the ultrasonic vibration and the smallest in a direction perpendicular to the ultrasonic vibration.

4. The connector according to claim 3, wherein a distance between two adjacent protrusions in the ultrasonic vibration direction is L1, and a distance between two adjacent protrusions in the direction perpendicular to the ultrasonic vibration direction is L2, wherein L1 and L2 satisfy: l1 is more than or equal to 0.5mm and less than or equal to 10mm, L2 is more than or equal to 0.5mm and less than or equal to 10mm, and L2 is more than or equal to L1.

5. The connecting member according to claim 1, wherein a plurality of the protrusions extend in the direction of the ultrasonic vibration on the surface of the connecting plate and are arranged at intervals in the direction perpendicular to the direction of the ultrasonic vibration.

6. The connector according to claim 5, wherein a distance L2 between adjacent two of the projections in a direction perpendicular to the ultrasonic vibration is not smaller than a width d of the projections.

7. The connecting member according to claim 5, wherein the length of the protrusion in the ultrasonic vibration direction is L, and the width of the protrusion in the direction perpendicular to the ultrasonic vibration direction is d, wherein L and d satisfy: l is 2+ d is 2 is more than or equal to X/4, and X is the width of the tab.

8. A battery cell, comprising:

the current collector comprises a plurality of pole pieces which are arranged in a stacked mode, and the pole pieces comprise pole lugs;

a conductive connection assembly including a connector as claimed in any one of claims 1 to 7, a plurality of said projections of said connector passing through and being electrically connected to a plurality of layers of said tabs.

9. The battery cell of claim 8, wherein the pole piece comprises: the first conductive layer and the second conductive layer are respectively covered on the two side surfaces of the supporting insulating layer in the thickness direction.

10. A battery pack comprising the battery cell according to claim 8 or 9.

Technical Field

The invention relates to the technical field of batteries, in particular to a connecting piece, a battery monomer and a battery pack.

Background

In the related art, copper foils are welded on two sides of a single-layer tab in an ultrasonic roll welding mode, and the welded copper foils are welded on a flexible connection. In the welding mode, each layer of tab needs to be welded, so that the welding cost is increased, and the material cost of the copper foil is increased.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a connecting piece, a battery monomer and a battery pack, wherein the connecting piece is ingenious in design and can reduce the welding difficulty of a lug.

The invention also provides a battery monomer.

The invention also provides a battery pack.

The connecting member according to the first aspect of the present invention is for connecting to a multilayer tab of a current collector by ultrasonic welding, and comprises: the connecting plate with locate arch on the connecting plate, protruding protrusion in one of them side surface of connecting plate in thickness direction, the arch includes a plurality ofly, and is a plurality of the multilayer is passed to the arch utmost point ear, and is a plurality of the intensive degree that the arch was arranged on the ultrasonic vibration direction is greater than the intensive degree of other directions except the ultrasonic vibration direction.

According to the connecting piece, the plurality of bulges which are arranged in the ultrasonic vibration direction and have the density degree larger than that of the bulges arranged in other directions except the ultrasonic vibration direction are arranged on the connecting piece, so that the welding speed between the lug and the connecting piece is increased, the manufacturing working hour is reduced, the production cost of a battery monomer is reduced, and the production efficiency of a battery pack is improved.

In some embodiments, the plurality of protrusions are arranged less densely in a direction perpendicular to the direction of the ultrasonic vibration than in other directions than perpendicular to the direction of the ultrasonic vibration.

In some embodiments, the plurality of protrusions are arranged in an array on the surface of the connection plate, and the arrangement density of the plurality of protrusions is the greatest in the direction along the ultrasonic vibration direction and the arrangement density of the plurality of protrusions is the smallest in the direction perpendicular to the ultrasonic vibration direction.

In some embodiments, a distance between two adjacent protrusions in the ultrasonic vibration direction is L1, and a distance between two adjacent protrusions in the direction perpendicular to the ultrasonic vibration direction is L2, wherein L1 and L2 satisfy: l1 is more than or equal to 0.5mm and less than or equal to 10mm, L2 is more than or equal to 0.5mm and less than or equal to 10mm, and L2 is more than or equal to L1.

Further, a plurality of the protrusions extend in the ultrasonic vibration direction on the surface of the connection plate and are arranged at intervals in a direction perpendicular to the ultrasonic vibration direction.

Further, in the direction perpendicular to the ultrasonic vibration, a distance L2 between adjacent two of the protrusions is not smaller than the width d of the protrusion.

Further, the length of the protrusion in the ultrasonic vibration direction is L, and the width of the protrusion in the direction perpendicular to the ultrasonic vibration direction is d, where L and d satisfy: l is 2+ d is 2 is more than or equal to X/4, and X is the width of the tab.

A battery cell according to a second aspect of the invention includes: the current collector comprises a plurality of pole pieces which are arranged in a stacked mode, and the pole pieces comprise pole lugs; conductive connection subassembly, conductive connection subassembly includes the connecting piece of above-mentioned first aspect, a plurality of the connecting piece the arch passes the multilayer utmost point ear and with utmost point ear electricity is connected.

According to the single battery, the conductive connecting component provided with the connecting piece in the first aspect is applied to the single battery, so that the assembly difficulty of the single battery is reduced, the manufacturing time of the single battery is reduced, the labor cost is reduced, and the reliability of the single battery is ensured.

In some embodiments, the pole piece comprises: the first conductive layer and the second conductive layer are respectively covered on the two side surfaces of the supporting insulating layer in the thickness direction.

A battery pack according to a third aspect of the present invention is characterized by including the battery cell of the second aspect.

According to the battery pack, the battery monomer in the second aspect is arranged, so that the safety performance of the battery pack is improved, the reliability of the battery pack is ensured, and the occurrence of danger is avoided.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Fig. 1 is a schematic view of a conductive connection assembly according to an embodiment of the first aspect of the present invention;

fig. 2 is a schematic diagram of a side view of the conductive connection assembly shown in fig. 1;

FIG. 3 is a schematic view of the connector shown in FIG. 1;

FIG. 4 is a schematic illustration of a side view of the connector shown in FIG. 3;

FIG. 5 is an enlarged partial view of the projection shown in FIG. 4;

FIG. 6 is a schematic view of another embodiment of the connector shown in FIG. 1;

FIG. 7 is a schematic view of a connector of the further embodiment shown in FIG. 1;

FIG. 8 is a schematic view of the connection shown in FIG. 1, wherein the projections are formed as cones;

FIG. 9 is a schematic illustration of a side view of the connector shown in FIG. 8;

FIG. 10 is a schematic view of a connector of yet another embodiment shown in FIG. 1;

FIG. 11 is a schematic illustration of a side view of the connector shown in FIG. 10;

FIG. 12 is a schematic view of the connector shown in FIG. 1, wherein the projection includes a connecting segment and a piercing segment;

FIG. 13 is a schematic illustration of a side view of the connector shown in FIG. 12;

FIG. 14 is a schematic view of the connector shown in FIG. 1, wherein the protrusions are formed as pyramids;

FIG. 15 is a schematic illustration of a side view of the connector shown in FIG. 14;

FIG. 16 is a schematic view of a coupling of the embodiment shown in FIG. 1;

FIG. 17 is a schematic illustration of a side view of the connector shown in FIG. 16;

fig. 18 is a schematic diagram of a side view of the conductive connection assembly shown in fig. 16;

fig. 19 is a schematic view of a battery cell according to an embodiment of the second aspect of the invention;

FIG. 20 is a schematic view of the connector shown in FIG. 19;

FIG. 21 is a schematic illustration of a top view of the connector shown in FIG. 20;

fig. 22 is a schematic view of a battery cell of another embodiment;

FIG. 23 is a schematic view of the connector shown in FIG. 22;

FIG. 24 is a schematic illustration of a top view of the connector shown in FIG. 23;

fig. 25 is a schematic view of a battery cell of yet another embodiment;

FIG. 26 is a schematic view of the connector shown in FIG. 25;

FIG. 27 is a schematic illustration of a top view of the connector shown in FIG. 26;

fig. 28 is a schematic view of a current collector.

Reference numerals:

the conductive connection assembly 100, the connection member 101, the connection plate 1011,

the protrusions 1012, the connecting section 10121, the piercing section 10122,

a protective plate 201, a current collector 202, a pole piece 2021, a tab 20211,

a first conductive layer 202111, a second conductive layer 202112, a support insulator layer 202113,

the battery cell 1000.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

First, a battery cell 1000 according to an embodiment of the second aspect of the present invention will be briefly described with reference to fig. 1 to 28, the battery cell 1000 including a connection member 101 according to an embodiment of the first aspect of the present invention.

The battery cell 1000 according to an embodiment of the present invention includes: a current collector 202 and a conductive connection assembly 100.

Specifically, as shown in fig. 1 to 28, the battery cell 1000 includes: the current collector 202 and the conductive connection assembly 100, the current collector 202 includes a plurality of pole pieces 2021 arranged in a stacked manner, the pole pieces 2021 include tabs 20211, the conductive connection assembly 100 includes the connection member 101 according to the first embodiment of the present invention, and the plurality of protrusions 1012 of the connection member 101 penetrate through the plurality of layers of tabs 20211 and are electrically connected to the tabs 20211. That is, the battery cell 1000 has a current collector 202 and a conductive connection assembly 100, the current collector 202 has a plurality of pole pieces 2021, the plurality of pole pieces 2021 are stacked, the pole pieces 2021 have tabs 20211, the conductive connection assembly 100 has a connection member 101, the connection member 101 is the connection member 101 according to the embodiment of the first aspect of the present invention, the connection member 101 includes a connection plate 1011 and a protrusion 1012, the protrusion 1012 has a plurality of protrusions 1012, and the plurality of protrusions 1012 are located on the connection plate 1011. Therefore, the battery cell 1000 has a simple structure, the tab 20211 and the connector 101 are connected in a simple manner, and the connection stability is good.

In some embodiments of the invention, pole piece 2021 comprises: a support insulating layer 202113, and a first conductive layer 202111 and a second conductive layer 202112 which cover both side surfaces in the thickness direction of the support insulating layer 202113, respectively. Referring to fig. 28, a support insulating layer 202113 is interposed between a first conductive layer 202111 and a second conductive layer 202112, and the first conductive layer 202111 and the second conductive layer 202112 cover an upper surface and a lower surface of the support insulating layer 202113, respectively.

A connection 101 according to an embodiment of the first aspect of the invention is described below with reference to fig. 1-28.

As shown in fig. 3, a connector 101 according to an embodiment of the first aspect of the present invention includes: a connecting plate 1011 and a projection 1012.

Specifically, the connecting member 101 is used for being connected to the multilayer tab 20211 of the current collector 202 by ultrasonic welding, and the connecting member 101 includes: the connection plate 1011 and the protrusion 1012 that sets up on the connection plate 1011, protrusion 1012 is protruding in one side surface of connection plate 1011 in the thickness direction, and the protrusion 1012 includes a plurality ofly, and a plurality of protrusions 1012 pass multilayer utmost point ear 20211, and the density that a plurality of protrusions 1012 arranged in the ultrasonic vibration direction is greater than the density of other directions except ultrasonic vibration direction.

That is, the multilayer tab 20211 of the current collector 202 is connected to the connection member 101 by ultrasonic welding, the connection member 101 has a connection plate 1011 and a plurality of protrusions 1012, the multilayer tab 20211 is penetrated by the plurality of protrusions 1012, the plurality of protrusions 1012 are provided at intervals on one side surface of the connection plate 1011 in the thickness direction, and the plurality of protrusions 1012 protrude toward a direction away from the connection plate 1011, the plurality of protrusions 1012 are arranged at the highest density in the ultrasonic vibration direction, and the plurality of protrusions 1012 are arranged at a lower density in the other directions than the ultrasonic vibration direction than the plurality of protrusions 1012 in the ultrasonic vibration direction.

When ultrasonic welding is used, high-frequency vibration which is tens of thousands of times per second is generated when ultrasonic waves act on the contact surface of a welded object, the plurality of protrusions 1012 are densely arranged along the vibration direction of the ultrasonic waves, the protrusions 1012 easily pierce through the multi-layer tab 20211, welding energy can penetrate through the connecting piece 101 and the tab 20211 more easily, and the welding difficulty of the tab 20211 and the connecting piece 101 is reduced.

Referring to fig. 3, the connection plate 1011 is formed in a horizontally extending plate body shape, the protrusions 1012 have a plurality of protrusions 1012, the plurality of protrusions 1012 are disposed on the upper surface of the connection plate 1011, and the plurality of protrusions 1012 are all protruded upward, each protrusion 1012 is disposed at regular intervals in the horizontal direction, each protrusion 1012 penetrates through the multi-layer tab 20211, and the plurality of protrusions 1012 are arranged at the highest density in the ultrasonic vibration direction. Therefore, welding energy easily penetrates through the connecting piece 101 and the tab 20211, the welding difficulty of the tab 20211 is reduced, and the welding process of workers is simplified.

According to the connecting piece 101 provided by the embodiment of the invention, the plurality of protrusions 1012 which are arranged in the ultrasonic vibration direction and have the density degree higher than that of the other directions except the ultrasonic vibration direction are arranged on the connecting piece 101, so that the welding speed between the tab 20211 and the connecting piece 101 is increased, the manufacturing time is reduced, the production cost of the battery monomer 1000 is reduced, and the production efficiency of the battery pack is improved.

In some embodiments of the present invention, the plurality of protrusions 1012 are arranged less densely in a direction perpendicular to the direction of the ultrasonic vibration than in other directions than perpendicular to the direction of the ultrasonic vibration. That is, the plurality of protrusions 1012 are arranged at the minimum density in the direction perpendicular to the ultrasonic vibration direction, and the plurality of protrusions 1012 are arranged at the maximum density in the ultrasonic vibration direction. Therefore, the welding speed between the tab 20211 and the connecting piece 101 is increased, the manufacturing working hours are reduced, the production cost is reduced, the multi-layer tab 20211 is easier to be pierced by the protrusion 1012, and the welding energy is easier to penetrate through the connecting piece 101 and the tab 20211.

Further, the plurality of protrusions 1012 are arranged in an array on the surface of the connection plate 1011, and the density of the arrangement of the plurality of protrusions 1012 is the greatest in the direction along the ultrasonic vibration and the density of the arrangement of the plurality of protrusions 1012 is the smallest in the direction perpendicular to the ultrasonic vibration. Here, it should be noted that when the density of the plurality of projections 1012 arranged in the ultrasonic vibration direction is sufficiently large, the projections 1012 are formed in a long strip shape extending in the ultrasonic vibration direction.

In some embodiments of the present invention, a distance between two adjacent protrusions 1012 in the ultrasonic vibration direction is L1, and a distance between two adjacent protrusions 1012 in the direction perpendicular to the ultrasonic vibration direction is L2, wherein L1 and L2 satisfy: l1 is more than or equal to 0.5mm and less than or equal to 10mm, L2 is more than or equal to 0.5mm and less than or equal to 10mm, and L2 is more than or equal to L1. That is, the pitch between two adjacent protrusions 1012 in the ultrasonic vibration direction is not larger than the pitch between two adjacent protrusions 1012 in the direction perpendicular to the ultrasonic vibration direction, that is, the density with which the plurality of protrusions 1012 are arranged in the direction perpendicular to the ultrasonic vibration direction is smaller than the density with which the plurality of protrusions 1012 are arranged in the ultrasonic vibration direction. Therefore, the welding speed is further improved, the production efficiency is improved, the production cost is reduced, the arrangement mode of the protrusions 1012 is optimized, the weak welding point between the tab 20211 and the connecting piece 101 is avoided, and the product quality is improved.

For example, the pitch L1 between two protrusions 1012 adjacent in the ultrasonic vibration direction may be: 0.5mm, 0.7mm, 0.9mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, and the like. The interval L2 between two adjacent protrusions 1012 in the direction perpendicular to the ultrasonic vibration direction may be: 0.5mm, 0.7mm, 0.9mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, 4mm, 4.5mm, 5mm, 5.5mm, 6mm, 6.5mm, 7mm, 7.5mm, 8mm, 8.5mm, 9mm, 9.5mm, 10mm, and the like.

In one embodiment of the present invention, a plurality of protrusions 1012 extend in the ultrasonic vibration direction on the surface of the connection plate 1011 and are arranged at intervals in the direction perpendicular to the ultrasonic vibration. Referring to fig. 3, a plurality of protrusions 1012 extend along the ultrasonic vibration direction on the upper surface of the connection plate 1011 and are spaced apart in the direction perpendicular to the ultrasonic vibration direction, and the protrusions 1012 are formed in a long strip shape, so that the contact area between the tab 20211 and the protrusions 1012 is increased, the tab 20211 is prevented from being welded to the connection member 101, and the connection strength between the tab 20211 and the connection member 101 is improved.

In some embodiments of the present invention, a distance L2 between adjacent two protrusions 1012 in a direction perpendicular to the direction of the ultrasonic vibration is not less than the width d of the protrusions 1012. That is, the spacing L2 between two adjacent protrusions 1012 in the direction perpendicular to the ultrasonic vibration direction is equal to or greater than the width d of the protrusion 1012, L2 may be equal to or greater than d, and L2 may also be equal to d. Therefore, the placing direction of the connector 101 during welding can be clearly distinguished, and the direction in which the distance between the protrusions 1012 is wider is placed in the direction perpendicular to the ultrasonic vibration direction, so that the production efficiency can be improved, and the welding between the protrusions 1012 and the tab 20211 can be firmer.

In some embodiments of the present invention, a length of the protrusion 1012 in the ultrasonic vibration direction is L, and a width of the protrusion 1012 perpendicular to the ultrasonic vibration direction is d, where L and d satisfy: l2 + d 2 is more than or equal to X/4, and X is the width of the tab 20211. It can be understood that the circumference of the four times of the protrusion 1012 should be not less than the width of the tab 20211, and if the circumference of the four times of the protrusion 1012 is less than the width of the tab 20211, the contact flow area is small, the flow capacity is low, the temperature rise speed is high, and the safety is low. Therefore, the connection strength of the protrusions 1012 and the tabs 20211 can be improved, the flow area is increased, the flow capacity is improved, the temperature rise speed is reduced, and the safety performance of the connecting piece 101 is improved.

Alternatively, L and d may satisfy: l2 + d 2 is more than or equal to X/4, and L and d can also satisfy the following conditions: l2 + d 2 is more than or equal to X/3, and L and d can also satisfy the following conditions: l2 + d 2 is more than or equal to X/2, and L and d can also satisfy the following conditions: l2 + d 2 ≧ X, and so forth.

Preferably, L and d satisfy: l is 2+ d is 2 is more than or equal to X, and X is the width of the tab 20211. It is understood that the circumference of the protrusions 1012 should be no less than the width of the tab 20211. Therefore, the connection strength of the protrusions 1012 and the tabs 20211 is further improved, the flow area is further increased, the flow capacity of the connecting piece 101 is further improved, the temperature rise speed is further reduced, and the safety performance of the connecting piece 101 is further improved.

Here, the width X of the tab 20211 is a side length of the tab 20211 in a direction perpendicular to the ultrasonic vibration direction, and as shown in fig. 16, the length of the tab 20211 in the left-right direction is the width of the tab 20211.

In some embodiments of the invention, the protrusions 1012 extend in a straight line and/or a curved line on the surface of the connection plate 1011. That is, the protrusion 1012 may extend linearly on the surface of the connection plate 1011, the protrusion 1012 may extend curvilinearly on the surface of the connection plate 1011, and the protrusion 1012 may extend linearly and curvilinearly on the surface of the connection plate 1011, or extend curvilinearly and rectilinearly. Therefore, the welding requirements of different composite current collectors 202 are met, the connection strength between the tab 20211 and the connecting piece 101 is improved, the application range of the connecting piece 101 is expanded, and the production cost of the connecting piece 101 is reduced.

Referring to fig. 26, the protrusion 1012 extends along a curve on the upper surface of the connection plate 1011, the protrusion 1012 is formed in a ring shape, four grooves are formed on the upper portion of the protrusion 1012, the four grooves are uniformly spaced on the upper portion of the protrusion 1012, and the four grooves are recessed downward from the upper end surface of the protrusion 1012 in the vertical direction, so that the contact area between the protrusion 1012 and each layer of the pole ears 20211 is increased, the flow area is increased, and the connection strength is improved.

In some embodiments of the present invention, the width of the protrusion 1012 is in the range of 0.1mm to 3mm, thereby not only avoiding waste of materials, but also ensuring the connection stability of the tab 20211 and the connection member 101. For example, the width of protrusion 1012 may be: 0.1mm, 0.15mm, 0.2mm, 0.3mm, 0.4mm, 0.55mm, 0.6mm, 0.85mm, 1.0mm, 1.1mm, 1.2mm, 1.3mm, 1.35mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 1.9mm, 2.0mm, 2.1mm, 2.2mm, 2.3mm, 2.45mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, and the like.

Alternatively, the cross-section of the protrusions 1012 perpendicular to the protrusion height may be circular, elliptical, or polygonal.

Specifically, when the cross section of the projection 1012 perpendicular to the projection height is circular, the projection 1012 may be cylindrical, conical, or truncated-cone-shaped, or the like; when the cross section of the protrusion 1012 perpendicular to the protrusion height is elliptical, the protrusion 1012 may be elliptical cylindrical, elliptical conical, or elliptical truncated, etc.; when the cross section of the protrusion 1012 perpendicular to the protrusion height is polygonal, the cross section may be triangular or quadrangular, etc., and the protrusion 1012 may be triangular pyramid, triangular prism, quadrangular pyramid, quadrangular prism, pentagonal pyramid, hexagonal pyramid, etc.

In some embodiments of the present invention, the height of the protrusion 1012 protruding from the connecting plate 1011 is in the range of 0.1mm to 3mm, which not only avoids the waste of materials, but also ensures the connection strength between the tab 20211 and the connecting member 101, and the overall structure of the battery cell 1000 is convenient to assemble into a battery pack, thereby saving the installation space, making the structure compact, reducing the volume of the battery pack, and reducing the transportation cost.

For example, the height of the protrusion 1012 protruding from the connection plate 1011 may be: 0.1mm, 0.15mm, 0.2mm, 0.4mm, 0.55mm, 0.6mm, 0.85mm, 1.0mm, 1.1mm, 1.2mm, 1.35mm, 1.4mm, 1.5mm, 1.6mm, 1.7mm, 1.8mm, 2.0mm, 2.2mm, 2.45mm, 2.6mm, 2.7mm, 2.8mm, 2.9mm, 3.0mm, and the like.

In some embodiments of the invention, the connection plate 1011 is made of the same material as the protrusions 1012. Because the material is different, the temperature resistance of conductor and the parameter such as resistance are also different, have great potential safety hazard, and use the same material, then guaranteed battery monomer 1000's reliability, reduced the fault rate, also guaranteed the safety in utilization of battery package, avoided the emergence of accident.

Alternatively, the connection plate 1011 uses T2 pure copper or copper alloy, etc.

In other embodiments, referring to FIG. 5, the protrusions 1012 comprise two portions: a connecting section 10121 and a puncture section 10122, the lower part of the protrusion 1012 is the connecting section 10121, the upper part of the protrusion 1012 is the puncture section 10122, the connecting section 10121 is connected with the connecting plate 1011, and the puncture section 10122 is connected at the upper end of the connecting section 10121.

Specifically, the piercing section 10122 of the protrusion 1012 is used for piercing the multi-layer tab 20211, and the connecting section 10121 of the protrusion 1012 is used for connecting the multi-layer tab 20211, so that welding energy easily penetrates through the connecting piece 101 and the tab 20211, the welding difficulty of the tab 20211 and the connecting piece 101 is reduced, the manufacturing time is reduced, the connecting strength between the tab 20211 and the connecting piece 101 is improved, the connection is stable, and the piercing effect of the protrusion 1012 is ensured while the connecting strength is improved.

A connector 101 according to one embodiment of the present invention will be described with reference to fig. 1-28.

Referring to fig. 16, the protrusion 1012 is formed in a long bar shape, the connection member 101 has a connection plate 1011 and a protrusion 1012, the protrusion 1012 includes a plurality of protrusions, each protrusion 1012 protrudes upward from the upper surface of the connection plate 1011, each protrusion 1012 is formed in a long bar shape and extends linearly on the upper surface of the connection plate 1011, and the plurality of protrusions 1012 extend in the ultrasonic vibration direction on the upper surface of the connection plate 1011, the thickness of the connection plate 1011 is 0.8mm, the length a of the connection plate 1011 in the front-rear direction is 80mm, the length b of the connection plate 1011 in the left-right direction is 30mm, the length L of the protrusion 1012 is 13mm, the width d of the protrusion 1012 is 0.6mm, the height of the protrusion 1012 is 0.6mm, the interval L2 between two adjacent protrusions 1012 is 2.4mm, and the connection plate 1011 is integrally formed with the plurality of protrusions 1012.

The battery cell 1000 according to the embodiment of the second aspect of the present invention includes a current collector 202 and a conductive connection assembly 100, wherein the conductive connection assembly 100 includes the connection member 101 according to the embodiment of the first aspect of the present invention.

According to the battery cell 1000 of the embodiment of the invention, the conductive connecting component 100 provided with the connecting component 101 of the embodiment of the first aspect is applied to the battery cell 1000, so that the assembly difficulty of the battery cell 1000 is reduced, the manufacturing time of the battery cell 1000 is reduced, the labor cost is reduced, and the reliability of the battery cell 1000 is ensured.

The battery pack according to the embodiment of the third aspect of the present invention includes the battery cell 1000 according to the embodiment of the second aspect of the present invention described above.

According to the battery pack provided by the embodiment of the invention, the battery monomer 1000 in the embodiment of the second aspect is arranged, so that the safety performance of the battery pack is improved, the reliability of the battery pack is ensured, and the occurrence of danger is avoided.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.