CN220797003U

CN220797003U - Battery package lid and have its battery package

Info

Publication number: CN220797003U
Application number: CN202322139289.2U
Authority: CN
Inventors: 万金钢; 高立军; 姚美齐
Original assignee: Yancheng Dafeng Csi Energy Storage Technology Co ltd; Atlas Energy Storage Technology Co ltd
Current assignee: Yancheng Dafeng Csi Energy Storage Technology Co ltd; Atlas Energy Storage Technology Co ltd
Priority date: 2023-08-09
Filing date: 2023-08-09
Publication date: 2024-04-16
Anticipated expiration: 2033-08-09

Abstract

The battery pack cover body comprises a cover plate and a plurality of drain pipelines spliced at the bottom of the cover plate, and a plurality of air holes which are used for being in one-to-one correspondence with the pressure release valves of the battery cells are formed in the drain pipelines. When a plurality of drain pipelines of the battery pack cover body are mutually independent and random battery cells are subjected to thermal runaway pressure relief, exhaust heat, smoke and the like enter the corresponding drain pipelines through air holes, peripheral battery cells and high-low voltage connecting devices cannot be sprayed, heat can be timely discharged outwards, influence on the peripheral battery cells is avoided, and therefore heat spreading of the battery cells is avoided.

Description

Battery package lid and have its battery package

Technical Field

The utility model relates to the field of photovoltaic cells, in particular to a battery pack cover body for effectively discharging heat and smoke generated after explosion release of a battery core to the outside and a battery pack with the battery pack cover body.

Background

The rapid development of new energy industry puts higher demands on energy storage technology. As cell modules in a battery pack become denser, heat is highly concentrated, and thermal management failure is the greatest potential safety hazard.

And each cell is provided with a pressure release valve, and in the use process, if the pressure and the temperature in the cell reach the threshold thermal runaway, the pressure release valve is automatically opened to release the explosion. The smoke discharging fog channels in the prior art are communicated, one cell is discharged and exploded, and the exploded heat and smoke can permeate into the whole battery pack to affect other cells, so that explosion discharging chain reaction is caused, and even explosion is caused.

In view of the foregoing, there is a need for an improved battery pack cover and battery pack having the same, which solve the above-mentioned problems.

Disclosure of Invention

In order to solve one of the problems, the utility model provides a battery pack cover body and a battery pack with the same, and the battery pack cover body adopt the following technical scheme:

the battery pack cover body comprises a cover plate and a plurality of drain pipelines spliced at the bottom of the cover plate, wherein a plurality of air holes which are used for being in one-to-one correspondence with the pressure release valves of the battery cells are formed in the drain pipelines.

Further, the drain pipe comprises a pair of side plates connected with the cover plate and a bottom plate connected with the bottom ends of the pair of side plates, and the plurality of air holes are formed in the bottom plate and distributed at equal intervals along the length direction of the drain pipe.

Further, the side plate is provided with a connecting plate for connecting with the cover plate, and the connecting plate extends from the top end of the side plate to a direction deviating from the other side plate.

Further, the side plates are in a plane shape or an arc shape protruding outwards.

Further, the bottom plate is in a plane shape, and/or fireproof heat insulation cotton is arranged at the bottom of the bottom plate.

Further, the drain pipeline is a closed pipeline which is circumferentially closed, the top of the closed pipeline is connected with the cover plate, and the air hole is positioned at the bottom of the closed pipeline.

Further, the drain pipe further includes a one-way seal provided at the air hole and opened only to the inside of the drain pipe.

Further, the battery pack cover body is also provided with a guide pipeline communicated with at least part of the drainage pipeline so as to guide the smoke in the heat exhaust channel to the explosion venting valve of the battery pack.

A battery pack comprises a battery pack shell, a plurality of battery cores positioned in the battery pack shell, and any one of the battery pack cover bodies, wherein air holes of the battery pack cover bodies are in one-to-one correspondence with pressure release valves of the battery cores.

Further, the battery pack shell is provided with an explosion-proof valve, and the battery pack cover body further comprises a guide pipeline which is communicated with at least part of the drain pipeline and extends to the explosion-proof valve.

The utility model has the beneficial effects that: according to the battery pack cover body and the battery pack with the battery pack cover body, the plurality of drainage pipelines are mutually independent, and when any battery core is subjected to thermal runaway pressure relief, discharged excretions such as spray leakage, heat, smoke and the like enter the corresponding drainage pipelines through the air holes and flow to the area where the explosion-proof valve is located along the heat discharging channel so as to be timely discharged outwards; excrement can not be sprayed to the peripheral battery cells and the high-low voltage connecting devices, so that the influence on the peripheral battery cells is avoided, and the heat spreading of the battery cells is avoided. And moreover, the drainage pipeline is physically spliced with the cover plate, the design is simple, the existing cover plate can be simply refitted, and the process of connecting the drainage pipeline is only required to be increased on the basis of the existing production line, so that the cost of reforming the line body is reduced. In addition, the drainage pipeline can further improve the strength of the battery pack cover body, and the sealing between the battery pack cover body and the battery pack shell body is not affected, so that adjacent battery packs are not affected.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and do not constitute a limitation on the utility model. In the drawings:

fig. 1 is a perspective view of a battery pack of the present utility model;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3;

fig. 5 is a schematic structural view of a battery pack case and a battery cell;

FIG. 6 is an enlarged view of a portion of FIG. 5;

fig. 7 is a structural view of a battery pack cover;

FIG. 8 is a schematic view of the structure of FIG. 7 at another angle;

FIG. 9 is an exploded view of FIG. 7;

FIG. 10 is a schematic view of the structure of FIG. 1 with the cover plate removed;

fig. 11 is a partial enlarged view of fig. 10.

The device comprises a 100-battery pack, a 1-battery pack shell, an 11-explosion-proof valve, a 12-module end plate, a 2-battery core, a 21-pressure release valve, a 3-battery pack cover body, a 31-cover plate, a 32-drainage pipeline, 321-air holes, 322-side plates, 323-bottom plates and 33-guide pipelines.

Detailed Description

In order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to specific embodiments of the present utility model and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

As shown in fig. 1 to 11, the battery pack 100 of the present utility model includes a battery pack case 1, a plurality of battery cells 2 positioned in the battery pack case 1, and a battery pack cover 3 mated with the battery pack case 1. For convenience of description, the up-down direction is defined in a manner in which the battery pack cover 3 is positioned at the top of the battery pack 100.

Referring to fig. 1 to 4 and 10 to 11, the battery pack case 1 is provided with an explosion-proof valve 11 to rapidly and intensively discharge the explosion-venting material when the battery cell 2 is out of control. In this embodiment, the battery pack case 1 is in a cuboid shape, and includes module end plates 12 respectively located at two ends of the battery pack case in a length direction, and the explosion-proof valves 11 are respectively disposed at two sides of the module end plates 12 in a width direction.

The top of electric core 2 is equipped with relief valve 21, and relief valve 21 opens upwards pressure release when out of control.

Referring to fig. 2 to 11, the present utility model aims to improve the battery pack cover 3 so as to effectively discharge the heat and smoke generated after the explosion of the battery cells 2 to the outside of the battery pack 100.

The battery pack cover body 3 comprises a cover plate 31 and a plurality of drain pipelines 32 spliced at the bottom of the cover plate 31, and a plurality of air holes 321 which are used for being in one-to-one correspondence with the pressure release valves 21 of the battery cells 2 are arranged on the drain pipelines 32.

The plurality of drain pipes 32 in the battery pack cover 3 are mutually independent, and when any battery cell 2 is subjected to thermal runaway pressure release, discharged excretions such as spray, heat, smoke and the like enter the corresponding drain pipe 32 through the air hole 321 and flow to the area where the explosion-proof valve 11 is located along the heat discharging channel to be timely discharged outwards; excrement can not be sprayed to the peripheral battery cells 2 and the high-low voltage connecting devices, so that the peripheral battery cells 2 are prevented from being influenced, and the heat spreading of the battery cells 2 is avoided. And, drain pipe 32 and apron 31 physics concatenation, the design is simple, can carry out simple repacking to current apron 31, and only need increase the process of connecting drain pipe 32 on the basis of current production line, has reduced the cost of reforming transform the line body. In addition, the drainage pipe 32 can also improve the strength of the battery pack cover 3, and ensure that the seal between the battery pack cover 3 and the battery pack housing 1 is not affected, so as not to affect the adjacent battery packs 100.

As shown in fig. 8 to 11, the drain pipe 32 includes a pair of side plates 322 connected to the bottom of the cover plate 31, and a bottom plate 323 connected to the bottom ends of the pair of side plates 322, and the plurality of air holes 321 are formed in the bottom plate 323 and distributed at equal intervals along the length direction of the drain pipe 32, and may directly correspond to the pressure release valve 21 at the top of the battery cell 2.

The shape of the side plate 322 is not limited and may be planar; or may be outwardly convex in an arc shape to expand the inner diameter of the drain pipe 32 and increase the heat removal rate under the condition of limited height.

For convenience in connection, the side plate 322 is provided with a connecting plate for connecting with the cover plate 31, and the connecting plate extends outwards from the top end of the side plate 322 to the direction away from the other side plate 322/to the drainage pipe 32, so that connection is facilitated, and the space in the drainage pipe 32 is not affected.

In this embodiment, the connection plate, the side plate 322, and the bottom plate 323 are integrally provided, so that the drain pipe 32 is shaped like a Chinese character 'ji', for example, a sheet metal part.

The connecting plate and the cover plate 31 can be connected in various ways, preferably by welding, so that the reliability is high, the gap sealing effect can be realized, and the use of sealing glue which may further cause fire is avoided.

The bottom plate 323 is preferably planar, so as to be capable of being pressed against explosion venting planes of the plurality of electric cores 2, ensure the lamination between the bottom plate 323 and the electric cores 2, and avoid the discharge of flame, smoke and heat discharged by the pressure release of the electric cores 2 from the gap between the bottom plate 323 and the electric cores 2.

Or, the bottom of the bottom plate 323 is provided with fireproof heat insulation cotton, so that the fit between the bottom plate 323 and the battery cells 2 is ensured, and meanwhile, the heat transfer between the adjacent battery cells 2 is delayed.

Further, the drain pipe 32 further includes a one-way seal provided at the air hole 321, which is opened only into the drain pipe 32, such as a one-way valve or the like. When the random battery cell 2 is depressurized, the discharged smoke and the like can be punched to open the corresponding one-way sealing piece to enter the exhaust channel, but the one-way sealing piece at other air holes 321 can not be opened in the flowing process of the smoke, so that other battery cells 2 can be effectively protected from being influenced.

In another embodiment, the only difference from the above embodiment is that: the drain pipe is not a semi-closed pipe in a shape like a Chinese character 'ji', but is a closed pipe which is circumferentially closed, the top of the closed pipe is connected with the cover plate 31, and the air hole 321 is positioned at the bottom of the closed pipe.

Further, the battery pack cover 3 is further provided with a guide pipe 33 communicated with at least part of the drain pipe 32, and the guide pipe 33 extends to the explosion-proof valve 11 of the battery pack 100 so as to guide the smoke in the heat exhaust channel to the explosion-release valve of the battery pack 100 for being discharged outwards.

In this embodiment, the drain pipe 32 extends along the length direction of the battery pack cover 3, the guide pipe 33 is located at one side of the length direction of the battery pack cover 3, extends along the width direction of the battery pack cover 3, and guides the smoke and the like to the explosion venting valve of the battery pack 100.

The two sides of the width direction of the module end plate 12 are respectively provided with an explosion-proof valve 11, two drain pipes 32 on the two sides basically correspond to the explosion-proof valve 11, and the guide pipe 33 is communicated with a plurality of drain pipes 32 in the middle of the width direction; the whole exhaust path is short, and the heat dissipation is fast.

In summary, in the battery pack cover 3 and the battery pack 100 having the same according to the present utility model, the plurality of drain pipes 32 are independent from each other, and when any battery cell 2 is subjected to thermal runaway pressure release, the discharged excretions such as spray, heat, smoke and the like enter the corresponding drain pipe 32 through the air hole 321, flow to the area where the explosion-proof valve 11 is located along the heat discharging channel, and are timely discharged outwards; excrement can not be sprayed to the peripheral battery cells 2 and the high-low voltage connecting devices, so that the peripheral battery cells 2 are prevented from being influenced, and the heat spreading of the battery cells 2 is avoided. And, drain pipe 32 and apron 31 physics concatenation, the design is simple, can carry out simple repacking to current apron 31, and only need increase the process of connecting drain pipe 32 on the basis of current production line, has reduced the cost of reforming transform the line body. In addition, the drainage pipe 32 can also improve the strength of the battery pack cover 3, and ensure that the seal between the battery pack cover 3 and the battery pack housing 1 is not affected, so as not to affect the adjacent battery packs 100.

In summary, according to the battery pack cover body and the battery pack with the battery pack cover body, the plurality of drainage pipelines are mutually independent, and when any battery core is subjected to thermal runaway pressure release, discharged excretions such as spray leakage matters, heat, smoke and the like enter the corresponding drainage pipelines through the air holes and flow to the area where the explosion-proof valve is located along the heat discharging channel so as to be timely discharged outwards; excrement can not be sprayed to the peripheral battery cells and the high-low voltage connecting devices, so that the influence on the peripheral battery cells is avoided, and the heat spreading of the battery cells is avoided. And moreover, the drainage pipeline is physically spliced with the cover plate, the design is simple, the existing cover plate can be simply refitted, and the process of connecting the drainage pipeline is only required to be increased on the basis of the existing production line, so that the cost of reforming the line body is reduced. In addition, the drainage pipeline can further improve the strength of the battery pack cover body, and the sealing between the battery pack cover body and the battery pack shell body is not affected, so that adjacent battery packs are not affected.

It should be understood that although the present disclosure describes embodiments in terms of examples, not every embodiment is provided with a single embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical embodiments of the present utility model, and is not intended to limit the scope of the present utility model, and all equivalent embodiments or modifications that do not depart from the spirit of the present utility model should be included in the scope of the present utility model.

Claims

1. The utility model provides a battery package lid, includes the apron, its characterized in that, battery package lid still including splice in a plurality of drain pipes of apron bottom, be equipped with on the drain pipe be used for with the relief valve one-to-one of electric core a plurality of gas pockets, the drain pipe include with the apron is connected a pair of curb plate, the bottom plate of the bottom of connecting a pair of curb plate, a plurality of gas pockets set up in on the bottom plate and be equidistant distribution along the length direction of drain pipe.

2. The battery pack cover according to claim 1, wherein the side plate is provided with a connection plate for connection with the lid plate, the connection plate extending from a top end of the side plate in a direction away from the other side plate.

3. The battery pack cover according to claim 1, wherein the side plate is planar or outwardly convex arc-shaped.

4. The battery pack cover according to claim 1, wherein the bottom plate is planar and/or the bottom of the bottom plate is provided with fireproof heat-insulating cotton.

5. The battery pack cover of claim 1, wherein the drain pipe is a closed pipe that is circumferentially closed, a top of the closed pipe is connected to the cover plate, and the air hole is located at a bottom of the closed pipe.

6. The battery pack cover of claim 1, wherein the drain duct further comprises a one-way seal provided at the air hole and opened only to the inside of the drain duct.

7. The battery pack cover of claim 1, further comprising a guide conduit in communication with at least a portion of the drain conduit for guiding smoke in the heat removal passage to a vent valve of the battery pack.

8. A battery pack comprising a battery pack shell and a plurality of electric cores positioned in the battery pack shell, wherein the battery pack further comprises a battery pack cover body according to any one of claims 1-7, and air holes of the battery pack cover body are in one-to-one correspondence with pressure release valves of the electric cores.

9. The battery pack of claim 8, wherein the battery pack housing is provided with an explosion-proof valve, and the battery pack cover further comprises a guide duct communicating with at least a portion of the drain duct and extending to the explosion-proof valve.