阅读说明：本技术 一种电池包 (Battery pack ) 是由 葛拥军 于 2021-01-15 设计创作，主要内容包括：本发明属于电池成组技术领域,公开了一种电池包,包括电池包外壳以及设置在电池包外壳内的槽体,槽体内设置有腔室,槽体上方盖设有盖板,盖板被配置为封闭腔室,腔室内设置有若干电芯层叠体,若干电芯层叠体之间横向堆叠设置,且每相邻两个电芯层叠体之间设置有泡棉,槽体外设置有正极金属框以及负极金属框,若干电芯层叠体的正极极耳均与正极金属框连接,若干电芯层叠体的负极极耳均与负极金属框连接。本发明的电池包无需将电芯层叠体组装成模组结构,原本模组结构所占用的空间全部让渡给电芯层叠体,单位体积内电池包的能量密度大大提高,且槽体内的电解液消耗殆尽时可以通过打开盖板进行补充,大大降低了电池包的生产以及使用成本。(The invention belongs to the technical field of battery grouping, and discloses a battery pack which comprises a battery pack shell and a groove body arranged in the battery pack shell, wherein a cavity is arranged in the groove body, a cover plate is covered on the upper portion of the groove body and configured to be a closed cavity, a plurality of battery cell laminated bodies are arranged in the cavity, the battery cell laminated bodies are transversely stacked, foam is arranged between every two adjacent battery cell laminated bodies, an anode metal frame and a cathode metal frame are arranged outside the groove body, anode tabs of the battery cell laminated bodies are connected with the anode metal frame, and cathode tabs of the battery cell laminated bodies are connected with the cathode metal frame. According to the battery pack, the battery cell laminated body does not need to be assembled into the module structure, the space occupied by the original module structure is completely transferred to the battery cell laminated body, the energy density of the battery pack in unit volume is greatly improved, and the electrolyte in the cell body can be replenished when the electrolyte is completely consumed by opening the cover plate, so that the production and use costs of the battery pack are greatly reduced.)

1. A battery pack is characterized by comprising a battery pack shell (100) and a groove body (200) arranged in the battery pack shell (100), a cavity (201) is arranged in the tank body (200), a cover plate (202) is covered above the tank body (200), the cover plate (202) is configured to enclose the chamber (201), a plurality of cell laminated bodies (203) are arranged in the chamber (201), and a plurality of cell laminated bodies (203) are transversely stacked, foam (204) is arranged between every two adjacent cell laminated bodies (203), an anode metal frame (205) and a cathode metal frame (206) are arranged outside the cell body (200), a plurality of anode tabs of the cell laminated body (203) are connected with the anode metal frame (205), and a plurality of cathode tabs of the cell laminated body (203) are connected with the cathode metal frame (206).

2. The battery pack according to claim 1, wherein the cell body (200) is provided with a pressing device (300), and the pressing device (300) can apply pressure to the cell stack (203) in a stacking direction of a plurality of the cell stacks (203).

3. The battery pack according to claim 2, wherein a gasket (207) is provided between the pressing device (300) and the cell stack (203).

4. The battery pack according to claim 3, wherein the pressurizing device (300) comprises a fixing bolt (301), the fixing bolt (301) is screwed to the side wall of the groove body (200), and one end of the fixing bolt (301) penetrating through the side wall abuts against the backing plate (207).

5. The battery pack according to claim 4, wherein the number of the fixing bolts (301) is at least two, and the fixing bolts (301) are uniformly arranged on the side wall.

6. The battery pack according to claim 1, wherein a fixing plate (101) is further disposed in the battery pack housing (100), the fixing plate (101) is detachably connected to the tank (200), and the fixing plate (101) is configured to fix the tank (200).

7. The battery pack of claim 1, wherein the channel (200) is made of an insulating material.

8. The battery pack according to any one of claims 1 to 7, wherein the number of the grooves (200) is several, and the several grooves (200) are uniformly arranged in the battery pack case (100) in the transverse direction and/or the longitudinal direction.

9. The battery pack according to claim 8, wherein the plurality of tanks (200) are connected in parallel, the positive metal frames (205) of the plurality of tanks (200) are connected, and the negative metal frames (206) of the plurality of tanks (200) are connected.

10. The battery pack according to claim 8, wherein the plurality of tanks (200) are connected in series, and in two adjacent tanks (200), the positive metal frame (205) of one tank (200) is connected with the negative metal frame (206) of the other tank (200).

Technical Field

The invention relates to the technical field of battery grouping, in particular to a battery pack.

Background

The battery pack, which is the most important power supply part of the electric vehicle and has been widely used as a power source for electric vehicles and hybrid electric vehicles, may be used to solve the problem of air pollution caused by gasoline and diesel engines using petroleum.

Since middle-or large-sized devices for automobiles and the like require high power and large capacity output, a middle-or large-sized battery pack is formed using a plurality of unit cells connected in series or in parallel with each other, however, the conventional battery pack has a structure consisting of a module, a PDU (power distribution unit), BMS (battery management system) software and hardware, high and low voltage leads, and the like, the structure of the module comprises a lithium ion polymer battery (the lithium ion polymer battery is made of an electrode assembly, the electrode assembly comprises a positive electrode, an isolating film, a negative electrode, a positive electrode lug connected with the positive electrode and a negative electrode lug connected with the negative electrode, the structure is also called as a battery cell laminating body or a winding body), foam, bolts, metal separators, electric wires, temperature sensing wires and the like, the module structure occupies a large amount of space in a battery pack, and the energy density of the battery pack is low due to the structure, and the cost of the battery pack is increased.

Disclosure of Invention

The invention aims to provide a battery pack, which solves the problems of low energy density and high cost of the battery pack.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a battery pack, is in including battery pack shell and setting cell body in the battery pack shell, be provided with the cavity in the cell body, the lid is equipped with the apron above the cell body, the apron is configured to seal the cavity, be provided with a plurality of electric core stacks in the cavity, and is a plurality of transversely pile up the setting between the electric core stacks, and per adjacent two be provided with the bubble cotton between the electric core stacks, the cell body is provided with anodal metal frame and negative pole metal frame outward, and is a plurality of the anodal utmost point ear of electric core stacks all with anodal metal frame is connected, and is a plurality of the negative pole utmost point ear of electric core stacks all with negative pole metal frame is connected.

Preferably, the cell body is provided with a pressurizing device capable of applying pressure to the cell laminated body in a stacking direction of a plurality of the cell laminated bodies.

Preferably, a gasket is disposed between the pressing device and the cell stack.

Preferably, the pressurizing device comprises a fixing bolt, the fixing bolt is in threaded connection with the side wall of the groove body, and the fixing bolt penetrates through one end of the side wall to abut against the base plate.

Preferably, the number of the fixing bolts is at least two, and the fixing bolts are uniformly distributed on the side wall.

Preferably, a fixing plate is further arranged in the battery pack shell, the fixing plate is detachably connected with the groove body, and the fixing plate is configured to fix the groove body.

Preferably, the tank body is made of an insulating material.

Preferably, the number of the groove bodies is a plurality, and the groove bodies are transversely and/or longitudinally and uniformly arranged in the battery pack shell.

Preferably, the plurality of the tank bodies are connected in parallel, the anode metal frames of the plurality of the tank bodies are connected, and the cathode metal frames of the plurality of the tank bodies are connected.

Preferably, the plurality of the tank bodies are connected in series, and the anode metal frame of one of the adjacent two tank bodies is connected with the cathode metal frame of the other tank body.

The invention has the beneficial effects that: according to the battery pack provided by the invention, the cell body is arranged in the outer shell of the battery pack, the cavity is arranged in the cell body, the cell laminates are directly stacked and arranged in the cavity, foam is arranged between every two adjacent cell laminates, electrolyte is filled in the cell body, the cavity is sealed through the cover plate, the electrolyte leakage is prevented, the whole battery pack does not need to assemble the cell laminates into a module structure, the space occupied by the original module structure is completely transferred to the cell laminates, the energy density of the battery pack in unit volume is greatly improved, meanwhile, the metal partition plates, the electric wires and the temperature sensing wires which are originally arranged in the module structure do not need to be arranged, and the cover plate can be opened to supplement when the electrolyte in the cell body is consumed completely, so that the production and use costs of the battery pack are.

Drawings

Fig. 1 is a schematic structural view of a battery pack provided in the present invention;

figure 2 is a side view of the trough of the present invention.

In the figure:

100. a battery pack housing; 101. a fixing plate; 200. a trough body; 201. a chamber; 202. a cover plate; 203. a cell laminate; 204. soaking cotton; 205. a positive electrode metal frame; 206. a negative electrode metal frame; 207. a base plate; 300. a pressurizing device; 301. and (5) fixing the bolt.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; 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 in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be configured and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The embodiment provides a battery pack, as shown in fig. 1 and fig. 2, which includes a battery pack case 100 and a tank 200 disposed in the battery pack case 100, wherein a chamber 201 is disposed in the tank 200, a cover plate 202 is disposed above the tank 200, the cover plate 202 is used to seal the chamber 201 in the tank 200, electrolyte is filled in the chamber 201, the chamber 201 after being sealed by the cover plate 202 can avoid leakage of the electrolyte, when the electrolyte is consumed up, the electrolyte can be replenished by opening the cover plate 202, a plurality of cell stacks 203 are disposed in the chamber 201 of the tank 200, the cell stacks 203 are stacked horizontally, a foam 204 is disposed between every two adjacent cell stacks 203, the foam 204 can avoid collision between two adjacent cell stacks 203, so as to prevent the cell stacks 203 from exploding, and the foam 204 has certain liquid absorbing and preserving capabilities, free electrolyte between the cell laminated bodies 203 can be reduced, the cell body 200 is externally provided with an anode metal frame 205 and a cathode metal frame 206, anode tabs of the cell laminated bodies 203 in the cavity 201 are connected with the anode metal frame 205, and meanwhile, cathode tabs of the cell laminated bodies 203 in the cavity 201 are connected with the cathode metal frame 206. The battery package that this embodiment provided need not to assemble into the module structure with electric core stack 203, and the shared space of module structure originally all gives electric core stack 203, and the energy density of battery package improves greatly in the unit volume, and simultaneously, the metal baffle that originally sets up in the module structure, the electric wire, the temperature-sensing line also need not to set up, and can supply through opening apron 202 when the electrolyte consumption in the cell body 200 is totally up, greatly reduced the production and the use cost of battery package.

Optionally, the cell body 200 of this embodiment is further provided with a pressurizing device 300, the pressurizing device 300 can apply pressure to the cell stack body 203 along the stacking direction of the cell stack body 203, and the cell stack body 203 is extruded from the stacking direction of the cell stack body 203, so that on one hand, the stability of the structure between the cell stack bodies 203 can be ensured, the cell stack body 203 is prevented from being displaced in the transportation and use processes, and the normal use of the battery pack is affected, on the other hand, the cell stack body 203 can be prevented from being expanded, further, the cell stack body 203 is prevented from being exploded, the service life of the battery pack is ensured, and the pressurizing device 300 realizes that the cell stack body 203 performs charge and discharge circulation under the.

In order to prevent the cell laminate 203 from being damaged due to the direct contact and pressing of the pressurizing device 300 with the cell laminate 203, a gasket is provided between the pressurizing device 300 and the cell laminate 203, the gasket can slide along with the direction of the pressurizing force applied by the pressurizing device 300 to the cell laminate 203 in the stacking direction, and the contact area between the pressurizing device 300 and the cell laminate 203 is increased by providing the gasket.

Further, the pressurizing device 300 includes a fixing bolt 301, the fixing bolt 301 is in threaded connection with the side wall of the tank body 200, the fixing bolt 301 penetrates one end of the side wall to abut against the pad 207, by rotating the fixing bolt 301, the fixing bolt 301 can move relative to the side wall, when the rotating fixing bolt 301 moves towards one end close to the cell laminated body 203, the fixing bolt 301 penetrates one end of the side wall to abut against the pad 207 and press the cell laminated body 203 to realize applying pressure on the cell laminated body 203, when the rotating fixing bolt 301 moves towards one end far away from the cell laminated body 203, the fixing bolt 301 penetrates one end of the side wall to release the pressure applied on the cell laminated body 203, and at this time, the cell laminated body 203 can be maintained and replaced. In order to apply a uniform force to the cell stack 203, the number of the fixing bolts 301 is at least two, and the fixing bolts 301 are uniformly arranged on the side wall.

The groove body 200 in this embodiment may adopt a scheme of detachable setting or a scheme of integral forming with the battery pack housing, the scheme of integral forming can save production cost, and the scheme of detachable setting can be convenient for detaching the groove body 200 for maintenance and convenient for installing the groove body 200. When the tank body 200 adopts a detachable scheme, a fixing plate 101 is further arranged in the battery pack shell 100, the fixing plate 101 is detachably connected with the tank body 200, and the fixing plate 101 is used for fixing the tank body 200 to ensure the stability of the tank body 200 in the battery pack shell.

In order to save space and production cost, a through hole is formed in the fixing plate 101, the fixing bolt 301 can penetrate through the upper through hole of the fixing plate 101 and then is in threaded connection with the side wall of the cell body 200, and the fixing bolt 301 can apply pressure to the cell laminated body 203 and can fix the cell body 200 and the fixing plate 101. In order to prevent the short circuit or the electric leakage of the cell stack 203, the tank 200 in this embodiment is made of an insulating material.

The number of the groove bodies 200 in the embodiment is set to be a plurality, the plurality of groove bodies 200 are transversely and uniformly arranged in the battery pack shell 100, or the plurality of groove bodies 200 are longitudinally and uniformly arranged in the battery pack shell 100, or the plurality of groove bodies 200 are transversely and longitudinally and uniformly arranged in the battery pack shell 100, and the space can be saved by uniformly arranging the groove bodies 200, so that the maximum utilization rate of the space in the battery pack shell is realized.

Optionally, in order to meet the battery capacity requirement of the battery pack, the plurality of troughs 200 are connected in parallel, the positive metal frames 205 of the plurality of troughs 200 are connected, and the negative metal frames 206 of the plurality of troughs 200 are connected, so that the battery capacity of the battery pack can be increased under the condition of a certain voltage by connecting the troughs 200 in parallel, and meanwhile, the battery pack is not easy to generate an overcharge phenomenon when being charged.

Optionally, in order to meet the requirements of the battery pack on different voltages in different environments, the plurality of tanks 200 are connected in series, in two adjacent tanks 200, the positive metal frame 205 of one tank 200 is connected with the negative metal frame 206 of another tank 200, and after the tanks 200 are connected in series, the voltages of the tanks 200 are added, so that the requirements of different electrical appliances on the voltages can be met.

In the battery pack provided by the embodiment, the battery cell laminated body 203 does not need to be assembled into a module structure in the whole battery pack, the space occupied by the original module structure is completely transferred to the battery cell laminated body 203, the energy density of the battery pack in unit volume is greatly improved, and the processing procedures are reduced; the metal partition plates, the electric wires and the temperature sensing wires which are originally arranged in the module structure do not need to be arranged, and the electrolyte in the cell body 200 can be replenished at any time by opening the cover plate 202 when the electrolyte is consumed completely, so that the production and use cost of the battery pack is greatly reduced; by arranging the pressurizing device 300, the cell laminated body 203 performs charge and discharge circulation under the condition of pressurization; in order to use different use environments or different battery capacity requirements, the grooves 200 can be adaptively adjusted in series and parallel, so that the compatibility of the battery pack is greatly enhanced.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.