CN210403875U

CN210403875U - Battery module, power battery package and vehicle

Info

Publication number: CN210403875U
Application number: CN201921438721.5U
Authority: CN
Inventors: 张越; 周燕飞; 张中林; 顾晓峰
Original assignee: Huizhou BYD Industrial Co Ltd
Current assignee: Huizhou BYD Industrial Co Ltd
Priority date: 2019-08-29
Filing date: 2019-08-29
Publication date: 2020-04-24
Anticipated expiration: 2029-08-29

Abstract

The utility model relates to a battery module, power battery package and vehicle, battery module is including holding a plurality of electric cores in the casing, the visor of lid above electric core, and set up the wire casing support between visor and electric core, the top of electric core is provided with explosion-proof valve block, the wire casing support is including being used for sheltering from the guard plate in explosion-proof valve block top, the visor is formed with the exhaust passage who corresponds with the guard plate position, in order to make the inside high-pressure gas of electric core pass the guard plate and outwards discharge via exhaust passage when explosion-proof valve block is opened. Like this, explosion-proof valve block top is provided with the guard plate that can provide guard action for it to can prevent that the foreign matter from dropping to explosion-proof valve block upper surface and influencing the action of opening the valve, reduce electrical safety hidden danger. In addition, need not to set up solitary exhaust structure in battery module inside, the inside high-pressure gas of electricity core can be discharged to the external world through the exhaust structure who comprises the exhaust passage on guard plate and the visor, simple structure, save space, reduce cost.

Description

Battery module, power battery package and vehicle

Technical Field

The disclosure relates to the technical field of power batteries, in particular to a battery module, a power battery pack and a vehicle.

Background

With the improvement of human environmental awareness, the electric vehicle replaces the fuel vehicle and gradually becomes the development trend of the automobile industry, and the importance of the electric vehicle as a power battery module of the core power energy of the electric vehicle is particularly prominent. The power battery module comprises a plurality of battery monomers of encapsulation in the shell, all is provided with the explosion-proof valve on every battery monomer, and the explosion-proof valve will be opened when battery monomer leads to electric core flatulence, seriously generate heat because of improper operations such as overcharge, short circuit or long-term circulation use to make the inside high-pressure gas of battery monomer in time discharge in can following the battery module, prevent thermal runaway diffusion and avoid the battery module to explode. Current battery module sets up solitary exhaust structure in order to carry out battery monomer exhaust pressure release usually inside, but battery module inner space is limited, and solitary exhaust structure often the structure is complicated, the assembly precision requires higher, the cost is higher. In addition, when the foreign matter falls to the upper surface of the explosion-proof valve, the valve opening action is influenced, and the potential electrical safety hazard exists.

SUMMERY OF THE UTILITY MODEL

An object of this disclosure is to provide a battery module, this battery module can realize inside electric core exhaust through simple exhaust structure, and can effectively guarantee battery module's security performance.

Another object of the present disclosure is to provide a power battery pack, which is provided with the battery module provided by the present disclosure.

It is still another object of the present disclosure to provide a vehicle equipped with the power battery pack provided by the present disclosure.

In order to realize the above-mentioned purpose, this disclosure provides a battery module, including holding a plurality of electric cores, the lid in the casing attach the visor of electric core top, and set up the visor with wire casing support between the electric core, the top of electric core is provided with explosion-proof valve block, wire casing support is including being used for sheltering from the guard plate of explosion-proof valve block top, the visor be formed with the exhaust passage that the guard plate position corresponds, in order to make when explosion-proof valve block is opened the inside high-pressure gas of electric core passes the guard plate and via the exhaust passage outwards discharges.

Optionally, the battery cells are arranged side by side along the length direction of the casing, the protection plate comprises a plate body extending along the length direction and a protrusion protruding upwards from the plate body, and the protrusion is formed into a valve opening accommodating cavity for overturning the explosion-proof valve plate.

Optionally, the exhaust channel is configured as a strip-shaped groove extending in the length direction.

Optionally, the exhaust passage includes a side wall extending downward from the top of the protective cover and attached to the outer periphery of the protrusion, the side wall includes two oppositely disposed first walls extending along the length direction and a second wall connecting one ends of the two first walls, and the other ends of the two first walls extend to the end of the protective cover respectively.

Optionally, the battery module is still including setting up the wire casing support with communication sampling plate between the visor, protruding including following a plurality of that length direction interval was laid, communication sampling plate is formed with the confession a plurality of through-holes that the arch passed, inside being formed with of exhaust passage is a plurality of the gas vent of protruding one-to-one.

Optionally, each protrusion corresponds to two adjacent explosion-proof valve plates of the battery cell.

Optionally, a blocking piece flush with the top surface of the protective cover is arranged above the exhaust passage, and the blocking piece and the protective cover are fixed in a sealing manner through a sealing element.

Optionally, a protection sheet is arranged on the top of the explosion-proof valve plate.

Optionally, a plurality of exhaust holes are formed in the protection plate, so that when the explosion-proof valve plate is opened, high-pressure gas in the battery cell is communicated with the exhaust channel.

Optionally, the inner surface of the protection plate facing the explosion-proof valve plate is provided with a notch thinning area.

According to a second aspect of the present disclosure, a power battery pack is provided, which includes the battery module according to the above.

According to a third aspect of the present disclosure, a vehicle is provided, the vehicle comprising a power battery pack according to the above.

Through above-mentioned technical scheme, explosion-proof valve block top is provided with the guard plate that can provide the guard action for it to can prevent that the foreign matter from dropping to explosion-proof valve block upper surface and influencing the action of opening the valve, reduce the electric potential safety hazard, effectively guarantee battery module's security performance. In addition, need not to set up solitary exhaust structure in battery module inside, the inside high-pressure gas of electricity core can be discharged to the external world through the exhaust structure who comprises the exhaust passage on guard plate and the visor, simple structure, save space, reduce cost.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic structural view of a battery module according to an exemplary embodiment of the present disclosure;

fig. 2 is a partial exploded view of the battery module shown in fig. 1;

fig. 3 is a partial sectional view of the battery module shown in fig. 1;

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

fig. 5 is a schematic view of an installation structure of a protective cover and a blocking plate in the battery module shown in fig. 1;

fig. 6 is a partial structural view of a protection plate in the battery module shown in fig. 1.

Description of the reference numerals

100 casing 200 electric core

210 explosion-proof valve plate 220 protection sheet

300 protective cover 310 exhaust channel

311 first wall 312 second wall

313 exhaust port 320 baffle

330 sealing element 400 trunking bracket

410 protection plate 411 plate body

412 protruding 500 communication sampling board

510 longitudinal direction of through hole L

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise stated, the terms of orientation such as "upper", "lower", "top" and "bottom" are generally defined according to the normal use state of the battery module, and refer to the direction of the drawing shown in fig. 1; "inner and outer" refer to the inner and outer of the respective component profiles. Furthermore, the terms "first," "second," and the like, as used in this disclosure, are intended to distinguish one element from another, and not necessarily for order or importance. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated.

Referring to fig. 1 to 3, the present disclosure provides a battery module, including a plurality of battery cells 200 accommodated in a casing 100, a protective cover 300 attached above the battery cells 200, and a wire duct bracket 400 disposed between the protective cover 300 and the battery cells 200, where the protective cover 300 is configured to form a closed cavity with the casing 100, so as to protect the battery cells 200 inside, the wire duct bracket 400 is configured to route wires between the plurality of battery cells 200 inside the casing 100 and support the wires, and an explosion-proof valve sheet 210 is disposed at the top of the battery cells 200, so that high-pressure gas inside the battery cells 200 can be timely discharged through a valve opening action. The wire groove bracket 400 may include a protection plate 410 for shielding the upper side of the rupture disk 210, and the protection cover 300 may be correspondingly formed with a vent passage 310 corresponding to the protection plate 410, so that when the rupture disk 210 is opened, the high-pressure gas inside the battery cell 200 passes through the protection plate 410 and is discharged to the outside through the vent passage 310.

Through above-mentioned technical scheme, explosion-proof valve block 210 top is provided with can be for its guard plate 410 that provides the guard action to can prevent that the foreign matter from dropping to explosion-proof valve block 210 upper surface and influencing the action of opening the valve, reduce the electrical safety hidden danger, effectively guarantee battery module's security performance. In addition, the battery module provided by the present disclosure does not need to be provided with an independent exhaust structure inside, the high-pressure gas inside the battery cell 200 can be discharged to the outside through the exhaust structure formed by the protection plate 410 and the exhaust passage 310 on the protection cover 300, the exhaust structure is formed by using the components of the battery module itself, and the battery module has a simple structure, saves space, and is low in cost.

It should be noted that, the present disclosure does not limit the specific structural form of the protection plate 410, as long as the protection plate can enable the high-pressure gas inside the battery cell 200 to pass through and smoothly enter the exhaust channel 310. For example, according to some embodiments, referring to fig. 1 and fig. 2, a plurality of vent holes may be opened on the protection plate 410 at positions corresponding to the explosion-proof valve sheet 210, so as to communicate the high-pressure gas inside the battery cell 200 with the vent channel 310 when the explosion-proof valve sheet 210 is opened, that is, the high-pressure gas may enter the vent channel 310 through the vent holes on the protection plate 410 to be finally discharged to the outside. For example, according to other embodiments, referring to fig. 6, the protection plate 410 may be formed in a closed structure with a closed outer surface, and an inner surface facing the rupture disk 210 and corresponding to the position of the rupture disk 210 may be provided with a scored thinned region, so that when the rupture disk 210 is opened, high-pressure gas inside the battery cell 200 may burst through the thinned region to enter the exhaust channel 310. This configuration of the shielding plate 410 enables smooth discharge of the high-pressure gas while sufficiently protecting the explosion-proof valve sheet 210. In this embodiment, the wire duct bracket 400 may be integrally formed of a plastic material such as PP, PVC, etc. to reduce the strength of the protection plate 410 as much as possible, thereby providing a guarantee for smooth discharge of high-pressure gas.

According to an embodiment provided by the present disclosure, referring to fig. 2 and 3, a plurality of battery cells 200 may be arranged side by side along a length direction L of the housing 100, wherein the protection plate 410 may include a plate body 411 extending along the length direction L and a protrusion 412 protruding upward from the plate body 411, and the protrusion 412 may be formed as a valve opening accommodating cavity for overturning the explosion-proof valve sheet 210. As shown in fig. 2, the explosion-proof valve sheet 210 of the battery cell 200 may be located at a middle position along the width direction of the casing 100, and each of the explosion-proof valve sheets 210 is linearly arranged along the length direction L, and accordingly, the protection plate 410 and the exhaust passage 310 also correspond to the middle position along the width direction of the casing 100. Electric core 200 has the shell of aluminium system usually, explosion-proof valve block 210 can the corresponding welding on electric core 200's top cap, during the valve opening, explosion-proof valve block 210 needs certain valve opening space in order to overturn and bounce off under high-pressure gas's impact, protruding 412 just in time can provide such valve opening space of explosion-proof valve block 210, and plate body 411 can corresponding laminating setting at electric core 200's upper surface, battery module inner space can be saved on the one hand, on the other hand can also guarantee the gas tightness between guard plate 410 and electric core 200, make the inside high-pressure gas of electric core 200 can only enter into exhaust passage 310 through protruding 412, and can not flow the security performance who influences battery module in battery module inside. The vent holes formed on the protection plate 410 or the score thinning areas formed on the inner surface of the protection plate can be correspondingly located on the protrusions 412.

Further, referring to fig. 1 and 2, the exhaust channel 310 may be respectively configured as a strip-shaped groove extending along the length direction L, the strip-shaped groove penetrating through the upper and lower surfaces of the protective cover 300, so that the high-pressure gas inside the battery cell 200 may be smoothly discharged to the outside.

Further, referring to fig. 2, the exhaust passage 310 may include a side wall extending downward from the top of the protective cover 300 and attached to the outer circumference of the protrusion 412, so as to ensure the airtightness of the battery module and prevent high-pressure gas inside the battery cell 200 from flowing into the battery module. The side walls may include two oppositely disposed first walls 311 extending in the length direction L and a second wall 312 connecting one ends of the two first walls 311, and the other ends of the two first walls 311 may extend to the ends of the protective cover 300, respectively. That is, in the embodiment of the present disclosure, the vent passage 310 may be configured as a groove structure opened on the protection cover 300 along the length direction L, and the groove structure is closed at one end and opened at the other end, and this structure may ensure the integrity and strength of the protection cover 300 to some extent. Wherein the top surface of the protrusion 412 does not exceed the top surface of the protective cover 300, i.e. the protrusion 412 may partially protrude into the exhaust channel 310, so as to enable the high-pressure gas to flow through the exhaust channel 310 to be exhausted and achieve the directional exhaust described below.

Referring to fig. 2, according to some embodiments, the battery module may further include a communication sampling board 500 disposed between the wire slot bracket 400 and the protective cover 300, and the communication sampling board 500 may be used to arrange components to identify the abnormal electrical core 200 and to alarm a fault in time. The protrusions 412 may include a plurality of protrusions arranged at intervals along the length direction L, and each protrusion 412 may correspond to one battery cell 200 or a plurality of battery cells 200 of the explosion-proof valve sheet 210, so as to provide a sufficient component arrangement area for the communication sampling plate 500. The communication sampling plate 500 may be respectively formed with a plurality of through-holes 510 through which the respective protrusions 412 pass, and the inside of the exhaust passage 310 may be respectively formed with exhaust ports 313 corresponding to the plurality of protrusions 412 one to one. That is, in the exhaust passage 310 configured in a groove-shaped structure, the two first walls 311 may be further formed with connection plates disposed at intervals therebetween to constitute the exhaust ports 313 corresponding to the plurality of protrusions 412, and high-pressure gas is exhausted. The size and dimension of the air outlet 313 can be matched and set according to the structure size of the protrusion 412, so that high-pressure gas can not flow to the inside of the battery module, namely, the high-pressure gas can only be discharged through the protrusion 412 and the exhaust passage 310, and can be completely isolated from the communication sampling plate 500, so that the communication sampling plate 500 can still normally work after the single battery cell 200 is opened, and the identification and timely fault alarm of the communication sampling plate 500 to the abnormal battery cell 200 can be ensured. On one hand, the connecting plate is covered and attached above the communication sampling plate 500 and the battery cell 200 like other parts of the protective cover 300 so as to protect the communication sampling plate and the battery cell 200; on the other hand, the strength of the protective cover 300 can be further improved.

Generally, the explosion-proof valve sheet 210 is mostly an aluminum sheet, and is provided with a score thinning area so that the high-pressure gas inside the battery cell 200 can blow it away. In order to avoid the accidental puncture of the anti-explosion valve plate 210 in the production, transportation, assembly and use processes of the battery cell 200, referring to fig. 4, the top of the anti-explosion valve plate 210 can be provided with the protection sheet 220, the protection sheet 220 can be made of hard material and have a size larger than that of the anti-explosion valve plate 210, and can be fixed above the anti-explosion valve plate 210 by means of bonding and the like, when the valve is opened, the protection sheet 220 and the anti-explosion valve plate 210 synchronously turn over and bounce under the impact of high-pressure gas, and thus the protrusion 412 is required to be provided with a sufficient valve opening cavity for bouncing the anti-explosion.

Further, in order to achieve the above purpose and provide the largest possible component layout area for the communication sampling plate 500, referring to fig. 3 and 4, each protrusion 412 may correspond to the explosion-proof valve sheet 210 of two adjacent battery cells 200, that is, two adjacent explosion-proof valve sheets 210 may share one valve opening cavity.

In addition, in the embodiment of the present disclosure, due to the special configuration of the exhaust channel 310, when there is no obstacle on the top of the battery module, after the battery cell 200 is opened, the internal high-pressure gas can be directly exhausted upwards; when the top of the battery module is provided with obstacles such as fireproof cotton, heat insulation materials, an upper cover of a battery box body and the like, high-pressure gas can be laterally discharged from the end part of the exhaust channel 310 penetrating to the protective cover 300, so that normal pressure relief is ensured.

Of course, when no obstacle is provided at the top of the battery module, directional exhaust in which high-pressure gas is discharged from the side of the exhaust duct 310 may be achieved. For example, referring to fig. 5, a blocking plate 320 flush with the top surface of the protective cover 300 may be disposed above the vent passage 310, and the blocking plate 320 and the protective cover 300 may be sealed and fixed by a sealing member 330, such as bonded cotton, so that the vent passage 310 is closed, and the high-pressure gas can only be discharged from an opening at the end of the protective cover 300 after entering the vent passage 310, so as to achieve directional venting.

The present disclosure also provides a power battery pack and a vehicle equipped with the power battery pack, wherein the power battery pack may include the above battery module. The power battery pack and the vehicle have all the beneficial effects of the battery module, and the detailed description is omitted.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims

1. The utility model provides a battery module, is including holding in a plurality of electric cores (200) of casing (100), lid attach visor (300) of electric core (200) top, and set up visor (300) with wire casing support (400) between electric core (200), the top of electric core (200) is provided with explosion-proof valve block (210), a serial communication port, wire casing support (400) are including being used for sheltering from guard plate (410) of explosion-proof valve block (210) top, visor (300) be formed with exhaust passage (310) that guard plate (410) position corresponds, with make when explosion-proof valve block (210) are opened the inside high-pressure gas of electric core (200) passes guard plate (410) and via exhaust passage (310) outwards discharge.

2. The battery module according to claim 1, wherein a plurality of the battery cells (200) are arranged side by side along a length direction (L) of the housing (100), the protection plate (410) comprises a plate body (411) extending along the length direction (L) and a protrusion (412) protruding upwards from the plate body (411), and the protrusion (412) is formed as a valve opening cavity for overturning the explosion-proof valve sheet (210).

3. The battery module according to claim 2, characterized in that the vent channel (310) is configured as a strip-shaped groove extending in the length direction (L).

4. The battery module according to claim 3, wherein the vent passage (310) includes a side wall extending downward from the top of the protective cover (300) and conforming to the outer circumference of the protrusion (412), the side wall including two oppositely disposed first walls (311) extending in the length direction (L) and a second wall (312) connecting one ends of the two first walls (311), the other ends of the two first walls (311) extending to the ends of the protective cover (300), respectively.

5. The battery module according to claim 4, further comprising a communication sampling plate (500) disposed between the wire duct bracket (400) and the protective cover (300), wherein the protrusion (412) includes a plurality of protrusions arranged at intervals in the length direction (L), the communication sampling plate (500) is formed with a plurality of through holes (510) through which the protrusion (412) passes, and the exhaust passage (310) is internally formed with exhaust ports (313) corresponding to the plurality of protrusions (412) in a one-to-one correspondence.

6. The battery module according to claim 5, wherein each protrusion (412) corresponds to the explosion-proof valve sheet (210) of two adjacent battery cells (200).

7. The battery module according to claim 4, wherein a stopper (320) flush with the top surface of the protective cover (300) is provided above the vent passage (310), and the stopper (320) and the protective cover (300) are sealingly fixed by a sealing member (330).

8. The battery module according to claim 1, wherein a protective sheet (220) is disposed on the top of the explosion-proof valve sheet (210).

9. The battery module according to any one of claims 1 to 8, wherein the protection plate (410) is provided with a plurality of vent holes for communicating high-pressure gas inside the battery cell (200) with the vent channel (310) when the explosion-proof valve sheet (210) is opened.

10. The battery module according to any one of claims 1-8, wherein the inner surface of the protection plate (410) facing the explosion-proof valve sheet (210) is provided with a scored thinning area.

11. A power battery pack, characterized by comprising the battery module according to any one of claims 1-10.

12. A vehicle characterized in that the vehicle includes the power battery pack according to claim 11.