CN220368004U - Battery shell and battery - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery shell and a battery. The battery case includes a case body having a receiving cavity; a partition plate integrally formed with the shell body is arranged in the accommodating cavity, and the accommodating cavity is partitioned into a battery cell placing cavity and a gas exhaust cavity by the partition plate; the shell body is provided with a pressure relief structure, the pressure relief structure is located the shell body and the partition board are matched to form the side wall of the exhaust cavity, and the pressure relief structure and the partition board are arranged oppositely. The battery provided by the application can improve the structural performance of the battery by optimizing the structure of the battery, reduce the possibility that the thermal runaway is reflected outside the battery, and prolong the time interval between the thermal runaway reflected inside the battery and the thermal runaway reflected outside the battery, so that the thermal runaway safety management performance of the thermal management system is conveniently improved.

Description

Battery shell and battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery shell and a battery.

Background

During battery application, phenomena such as expansion and gas production may occur in the battery case. When the gas pressure in the battery shell reaches a certain degree, high-temperature and high-pressure substances in the battery can be sprayed out from the pressure relief structure, the high-temperature and high-pressure substances contain gas and impurities, and the impurities are sprayed out from the pressure relief structure and contact with external air to cause the ignition of the battery. It is noted that when the time interval between the thermal runaway reflected inside the battery and the thermal runaway reflected outside the battery is short, for example, in a short time when the rapid expansion of the battery is found, the high-temperature and high-pressure substance is ejected from the case body, which causes the rapid ignition of the battery, and is unfavorable for the thermal management system or the external operator to take timely measures to prevent the thermal runaway from spreading.

Disclosure of Invention

The utility model provides a battery shell and a battery, wherein the battery shell can improve the structural performance of the battery by optimizing the structure, reduce the possibility that the thermal runaway is reflected outside the battery, prolong the time interval between the thermal runaway reflected inside the battery and the thermal runaway reflected outside the battery, and facilitate the improvement of the thermal runaway safety management performance of a thermal management system.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

according to a first aspect of the present utility model, there is provided a battery case including a case body having a receiving cavity; a partition plate integrally formed with the shell body is arranged in the accommodating cavity, and the accommodating cavity is partitioned into a battery cell placing cavity and a gas exhaust cavity by the partition plate; the shell body is provided with a pressure relief structure, the pressure relief structure is located the shell body and the partition board are matched to form the side wall of the exhaust cavity, and the pressure relief structure and the partition board are arranged oppositely.

It should be noted that, in the battery case that this application provided, the baffle separates into electric core with the inside chamber that holds of shell body and places chamber and exhaust chamber, and wherein, electric core is placed the chamber and is used for placing electric core, and exhaust chamber is used for storing the valve material that gets into from electric core placement chamber. When using the battery casing that this application provided, if the electric core of intracavity is placed to the electric core takes place thermal runaway, be used for separating the electric core and place the baffle of chamber and exhaust chamber and can be broken, this baffle can block the impurity of a part particulate matter, with reduce impurity from pressure release structure blowout contact to the outside air lead to the battery to fire, take place thermal runaway's possibility, simultaneously, the electric core is placed the intracavity gas and is entered into after the exhaust chamber, the heat of gas, temperature and the energy of blast gate can be cut down the part, based on this, the valve opening stability of the pressure release structure of locating the shell body can be improved. Meanwhile, after the spray valve substance enters the exhaust cavity, a certain delay effect is brought to the valve opening time of the gas generation and pressure relief structure of the thermal runaway of the battery, so that the time interval between the thermal runaway reflected inside the battery and the thermal runaway reflected outside the battery can be increased, the thermal management system can be given longer operable time for treating the thermal runaway, and the thermal runaway safety management performance of the thermal management system can be further improved.

According to a second aspect of the present utility model, there is provided a battery comprising a battery case and a battery cell as provided in any of the above first aspects, the battery cell being disposed in a cell placement cavity of the battery case.

It should be noted that, in the battery that this application provided, the baffle in the battery case separates into electric core with the inside chamber of holding of shell body and places chamber and exhaust chamber, and wherein, electric core is placed electric core and is placed the intracavity, and exhaust chamber is used for storing the spray valve material that gets into from electric core placement chamber. When using this battery, if the electric core of electric core place the intracavity and take place thermal runaway, the baffle that is used for separating electric core and places chamber and exhaust chamber can be broken, this baffle can block the impurity of a part particulate matter, with reduce impurity from pressure release structure blowout contact to the outside air and lead to the battery to fire, take place thermal runaway possibility, simultaneously, the electric core is placed the intracavity gas and is entered into after the exhaust chamber, the heat of gas, temperature and the energy of spout valve can be cut down the part, based on this, the valve stability of opening of the pressure release structure of locating the shell body can be improved. Meanwhile, after the spray valve substance enters the exhaust cavity, a certain delay effect is brought to the valve opening time of the gas generation and pressure relief structure of the thermal runaway of the battery, so that the time interval between the thermal runaway reflected inside the battery and the thermal runaway reflected outside the battery can be increased, the thermal management system can be given longer operable time for treating the thermal runaway, and the thermal runaway safety management performance of the thermal management system can be further improved.

Drawings

For a better understanding of the present application, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present application. In addition, the relevant elements or components may have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views. Wherein:

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

FIG. 2 is a schematic view of the structure of FIG. 1 with a portion of the housing body removed;

FIG. 3 is a schematic view of the battery housing of FIG. 1 at another angle;

fig. 4 is a schematic view of a second structure of a battery case according to an embodiment of the present application.

The reference numerals are explained as follows:

100. a housing body; 110. a receiving chamber; 111. a cell placement cavity; 112. an exhaust chamber; 200. a partition plate; 210. a weak portion; 300. a pressure relief structure; 400. and a cover plate assembly.

Detailed Description

The technical solutions in the exemplary embodiments of the present application will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present application. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present application, and it is therefore to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present application.

In the description of the present application, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present application can be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present application, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, which are described in the exemplary embodiments of the present application, are described with the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present application. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

In a first aspect, embodiments of the present application provide a battery housing. Fig. 1 is a schematic structural view of a battery case according to an embodiment of the present disclosure; FIG. 2 is a schematic view of the structure of FIG. 1 with a portion of the housing body removed;

FIG. 3 is a schematic view of the battery housing of FIG. 1 at another angle; fig. 4 is a schematic view of a second structure of a battery case according to an embodiment of the present application.

Referring to the structure shown in fig. 1 to 4, the battery case provided in the embodiment of the present application includes a case body 100, and the case body 100 has a receiving cavity 110; a partition board 200 integrally formed with the case body 100 is arranged in the accommodating cavity 110, and the partition board 200 divides the accommodating cavity 110 into a cell placing cavity 111 and an exhaust cavity 112; the casing body 100 is provided with a pressure relief structure 300, the pressure relief structure 300 is located on a side wall of the exhaust cavity 112 formed by cooperation of the casing body 100 and the partition board 200, and the pressure relief structure 300 is disposed opposite to the partition board 200.

Specifically, as shown in fig. 1 and fig. 2, in the battery case provided in the embodiment of the present application, the partition 200 divides the accommodating cavity 110 inside the case body 100 into the cell placement cavity 111 and the exhaust cavity 112, where the cell placement cavity 111 is used for placing the cell, and the exhaust cavity 112 is used for storing the injection valve substance entering from the cell placement cavity 111.

It should be appreciated that the structural design of integrally forming the separator 200 and the case body 100 can improve the stability of the structure therebetween, and prevent the separator 200 from falling off from the case body 100 under high-pressure impact, so as to ensure that the separator 200 stably supports the battery cells and performs a separation function. It is noted that in the conventional battery, a bottom bracket may be disposed in the battery case to lift the battery cell. However, the bottom bracket is provided separately inside the battery case, there is a moving amount, and the moving direction thereof is not controllable. When the battery is used, the battery core can move in the battery shell and scratch the shell, so that the safety performance is poor.

When the battery case provided in this embodiment of the application is used, if the battery core in the battery core placing cavity 111 is thermally out of control, the partition board 200 for separating the battery core placing cavity 111 from the exhaust cavity 112 may be broken, the partition board 200 may block a part of impurities of particulate matters, and meanwhile, after the gas in the battery core placing cavity 111 enters the exhaust cavity 112, the heat, the temperature of the gas and the energy of the spraying valve may be reduced, based on this, the stability of the valve opening of the pressure release structure 300 provided in the case body 100 may be improved, so as to reduce the possibility that the battery fires and thermal out of control may occur due to the fact that the impurities are sprayed from the pressure release structure 300 to contact with the external air, and meanwhile, since the valve opening time of the pressure release structure 300 has a certain delay effect on the thermal out of control gas generated by the battery after the valve material enters the exhaust cavity 112, the time interval between the thermal out of control reflected in the battery and the thermal out of control reflected outside the battery may be increased, the thermal out of control may be processed by the thermal management system, and the thermal out of control safety management system may be further be improved.

It should be appreciated that during thermal runaway of the battery, a thermal runaway feature, such as a sharp increase in gas within the cell placement cavity 111 of the housing body 100, may first occur within the battery. It is noted that during this process, the expansion of the case body 100 or the surge in the battery internal temperature is observed from the outside of the battery. When the thermal runaway characteristics of the battery interior are characterized to some extent, the thermal runaway of the battery interior is exposed, e.g., high pressure gas within the battery interior is ejected from the pressure relief structure 300 to the outside of the battery. It should be noted that, in the thermal management system, it is desirable to have enough time to monitor and process the thermal runaway phenomenon of the battery during the thermal runaway management of the battery, so that the time interval between the thermal runaway occurring inside the battery and the thermal runaway occurring outside the battery needs to be properly enlarged to perform certain buffering, but it is still necessary to ensure that the pressure relief can be performed through the pressure relief structure 300 in time on the basis that the battery does not explode.

In one embodiment, with continued reference to the structure shown in fig. 1-3, the separator 200 is provided with a frangible portion 210, the frangible portion 210 being adapted to be ruptured by the exhaust gas within the cell placement cavity 111.

Illustratively, when a cell or like structure within the cell placement chamber 111 generates a high pressure gas due to thermal runaway, the gas may act on the frangible portion 210 of the separator 200 to facilitate the exhaust gas to break through the separator 200 to the exhaust chamber 112. It will be appreciated that the high pressure gas forms a vent and, of course, may also be entrained with particulate matter such as impurities.

It should be noted that, in this embodiment, the exhaust cavity 112 may weaken the heat and temperature of the gas and the energy of the spraying valve, so as to avoid the high-pressure gas from entering the exhaust cavity 112 to immediately break the pressure release structure 300 on the bottom wall of the housing body 100. It should be noted that, after the gas in the exhaust cavity 112 is accumulated to a certain pressure value, the portion of the gas breaks through the pressure release structure 300, so as to spray the high-pressure gas inside the battery into the external environment of the battery; if the gas in the exhaust chamber 112 does not accumulate to a pressure value, the pressure relief structure 300 is not opened and the battery can still be used.

It should be noted that the exhaust cavity 112 not only can reduce the possibility of the battery being damaged by the pressure released from the pressure release structure 300, but also can delay the time for the exhaust to break through the pressure release structure 300 so as to provide enough processing time for the thermal management system, thereby improving the safety performance of the battery and further improving the safety performance of the thermal management system using the battery.

When the weakened portion 210 on the bottom wall of the case body 100 is specifically provided, the weakened portion 210 has various structural forms, specifically at least one of the following forms.

In one embodiment, the frangible portion 210 is a score provided in the separator 200.

Specifically, the separator 200 at the score is weak, and when the gas in the cell placement cavity 111 reaches a certain pressure, the gas acts on the score, so that the weak portion 210 bursts from the score. It should be appreciated that when the frangible portion 210 is broken, the score falls completely or partially around the separator 200 in the area.

It should be understood that the scores on the separator 200 may be a continuous structure, and the continuous scores may ensure that when the gas in the cell placement cavity 111 acts on the weak portion 210, the weak portion 210 can be normally exploded everywhere, so as to ensure that the gas in the cell placement cavity 111 can effectively pass through the separator 200 to perform gas leakage, thereby improving the safety of the battery. Of course, the score may also be formed by a multi-segment discontinuous structure, and may be specifically set according to needs, which will not be described herein.

In one embodiment, the weakened portions 210 are thinned portions provided in the separator 200.

In particular, the thinned spacer 200 is thinner than the spacer 200 in other areas so that the gas within the cell placement cavity 111 can effectively rupture the weakened portion 210.

It should be noted that, when the weak portion 210 is a thinned portion provided on the partition board 200, the weak portion 210 may be formed by thinning the partition board 200 at the thinned portion, or a through hole structure may be formed on the partition board 200 first, and then a thinner board body is placed in the through hole structure to form the weak portion 210, which may be specifically set according to the requirement, and will not be described herein.

In one embodiment, with continued reference to the structure shown in fig. 1 and 2, the weakened portion 210 is a through hole provided in the separator 200.

It should be noted that, since the weak portion 210 is a through hole formed in the separator 200, the cell placement cavity 111 and the exhaust cavity 112 are always in a communication state, and the gas in the cell placement cavity 111 can effectively pass through the separator 200 to enter the exhaust cavity 112 for venting, so as to improve the safety of the battery.

Meanwhile, since the battery cell placing cavity 111 is communicated with the exhaust cavity 112, the exhaust cavity 112 can play a role in storing electrolyte, for example, the battery can be inverted when the battery needs to be replenished with liquid, the battery is convenient and quick, secondary liquid injection is not needed, and the structural performance of the battery can be improved.

In one embodiment, the weak portion 210 includes a through hole, and the size of the through hole is large, so that the gas exhausted from the cell placement chamber 111 can rapidly pass through the separator 200 to enter the exhaust chamber 112, thereby improving the safety of the battery.

In another specific embodiment, the number of through holes is plural, and the plural through holes are arranged at intervals along the extending direction of the separator 200. Illustratively, the weakened portions 210 formed by the plurality of through-holes are spaced apart along the length of the separator 200 as shown in fig. 2.

Note that, since it is necessary to form through holes by punching out a part of the separator 200 in the process of preparing the weak portion 210, the present embodiment includes a plurality of through holes by providing the weak portion 210 to reduce the removed area of the separator 200. Based on this, the structural strength of the partition board 200 can be improved on the basis of ensuring that the weak portion 210 effectively connects the core placement chamber 111 and the exhaust chamber 112.

Meanwhile, in this embodiment, by arranging a plurality of through holes at intervals along the length direction of the separator 200, it can be ensured that communication points exist between the cell placement cavity 111 and the exhaust cavity 112 in each position along the length direction, so as to ensure that gas and/or electrolyte can effectively pass through the separator 200 in each position, and further, the safety performance of the battery can be improved.

With continued reference to the structure shown in fig. 2, a plurality of through holes may be disposed at even intervals, so as to promote uniformity of the arrangement of the through holes along the length direction, so as to better ensure a communication effect between the gas and/or the electrolyte, and further promote safety performance of the battery.

It is noted that the size of the through holes may be larger as shown in fig. 2, or, in another specific embodiment, the size of each through hole may be smaller, and the plurality of through holes may be regularly or irregularly arranged to form a screen-like structure. It should be noted that, the screen structure can effectively filter particles in the battery cell placing cavity 111, reduce the possibility that particulate matters enter the exhaust cavity 112, and further improve the safety performance of the battery.

It should be noted that the weak portion 210 of the separator 200 may be combined with one or more of the above embodiments, and may be specifically set according to the requirement, which is not described herein.

In one embodiment, with continued reference to the structure shown in fig. 1-4, the opposite sides of the housing body 100 are provided with openings. The battery case that this application embodiment provided still includes apron subassembly 400, and apron subassembly 400 includes apron body and utmost point post, and apron body lock opening, the apron body is located to the utmost point post, and the utmost point post is used for connecting the electric core that the electric core was placed in chamber 111.

It should be noted that the number of the openings at the housing body 100 may be one or two, and a cover body is fastened to each opening, and a pole may be disposed at the cover body to form the cover assembly 400. For example, as shown in fig. 4, when the case body 100 has two openings, the number of the cover plate assemblies 400 is also 2, and each cover plate assembly 400 is snapped into the opening of the case body 100.

When the battery shell provided by the embodiment of the application is applied, the battery cell can extend into the battery cell placing cavity 111 from the opening of the shell body 100. In the process of placing the battery cells, since the separator 200 and the case body 100 are in an integrated structure, the separator 200 can provide stable support to prevent the battery cells from being scratched and rubbed, and improve the yield of the battery. Notably, in the existing battery, the bottom bracket is independently arranged inside the battery shell, and has a moving amount, so that when the battery core is subjected to the shell entering operation, the bottom bracket cannot effectively support the battery core, and the battery core is scratched, so that the battery yield is affected.

In one embodiment, with continued reference to the structure illustrated in fig. 1-3, a side end surface of the partition 200 facing the cover assembly 400 is flush with a side end surface of the case body 100 facing the cover assembly 400. In other words, as shown in fig. 2, the length of the partition 200 is the same as the length of the case body 100 in the length direction of the case body 100, and the two are aligned at the end face.

It should be noted that, the side end surface of the separator 200 may be matched with the side end surface of the case body 100 to effectively support the cover plate assembly 400, so as to improve stability of the cover plate assembly 400 and further improve structural performance of the battery.

In another embodiment, a side end surface of the partition plate 200 facing the cap plate assembly 400 is spaced apart from a side end surface of the case body 100 facing the cap plate assembly 400. In other words, the length of the partition plate 200 is smaller than the length of the case body 100 in the length direction of the case body 100, and the partition plate 200 leaves a margin at each side end to form a gap between the partition plate 200 and the cap plate body after the cap plate assembly 400 is fastened to the case body 100. This structure sets up, on the one hand can effectively dodge apron subassembly 400, avoid taking place to interfere, on the other hand can adopt the clearance that forms between baffle 200 and the apron body to form other transmission channels, gas feed through to exhaust fast to exhaust chamber 112.

In one embodiment, the pressure relief structure 300 is provided at the bottom of the housing body 100, and the bottom of the housing body 100 is configured to face the bottom plate of the case.

It should be noted that, in this embodiment, the pressure release structure 300 is located at one side of the bottom plate of the case body 100 facing the case body, that is, the pressure release structure 300 is located at the bottom wall of the case body 100, so that other structural members can be conveniently arranged at the top of the battery, so as to improve the space utilization rate of the battery pack applying the battery case, and the pressure release structure 300 can be flushed towards the bottom plate of the case body, rather than one side of the passenger cabin, so that the safety performance is improved.

In a second aspect, embodiments of the present application also provide a battery. The battery provided in the embodiments of the present application includes a battery case and a battery cell provided in any of the above first aspects, where the battery cell is disposed in the battery cell placement cavity 111 of the battery case.

It should be noted that, in the battery provided in the embodiment of the present application, the partition board 200 divides the accommodating cavity 110 inside the housing body 100 into the cell placement cavity 111 and the exhaust cavity 112, where the cell is placed in the cell placement cavity 111, and the exhaust cavity 112 is used for storing the valve material entering from the cell placement cavity 111. When the battery is applied, if the battery core in the battery core placing cavity 111 is subject to thermal runaway, the partition board 200 for separating the battery core placing cavity 111 from the exhaust cavity 112 can be broken, the partition board 200 can block a part of impurities of the particulate matters so as to reduce the possibility that the impurities are sprayed out from the pressure release structure 300 to contact with the external air to cause the ignition of the battery and the thermal runaway, and meanwhile, after the gas in the battery core placing cavity 111 enters the exhaust cavity 112, the heat, the temperature and the energy of the spraying valve of the gas can be reduced, so that the valve opening stability of the pressure release structure 300 arranged on the shell body 100 can be improved. Meanwhile, after the material of the spray valve enters the exhaust cavity 112, a certain delay effect is provided for the valve opening time of the gas generation and pressure release structure 300 of the thermal runaway of the battery, so that the time interval between the thermal runaway reflected inside the battery and the thermal runaway reflected outside the battery can be increased, the thermal management system can be given longer operable time for treating the thermal runaway, and the thermal runaway safety management performance of the thermal management system can be further improved.

In one embodiment, the cell includes a cell body and a tab portion that leads from the cell body.

The battery cell body may be formed by winding or laminating, and a separator is provided between the positive electrode sheet and the negative electrode sheet, regardless of whether the battery cell body is a winding type or a lamination type. The parts of the positive plate and the negative plate with active substances form a battery cell main body, and the parts of the positive plate and the negative plate without active substances form a tab in the battery cell. The lugs of the plurality of positive plates are stacked and folded to form positive-polarity lugs, and the lugs of the plurality of negative plates are stacked and folded to form negative-polarity lugs.

It should be appreciated that the tab portions may lead from the same side or different sides of the cell body. The battery cell includes two tab portions, each tab portion corresponding to one opening of the case body 100, and two tab portions including a positive polarity tab portion and a negative polarity tab portion. The positive polarity tab portion of the cell is connected to the post of one cap assembly 400 such that the post is the positive electrode of the battery and the negative polarity tab portion is connected to the post of the other cap assembly 400 such that the post is the negative electrode of the battery.

It will be appreciated that the battery is also internally provided with an electrolyte. The electrolyte consists of electrolyte, organic solvent and additive. The electrolyte is an important material in the battery, can transport lithium ions and provide power required by the battery, and is a key component for the battery to exert energy. During charge and discharge of the battery, the active material of positive polarity and the active material of negative polarity react with the electrolyte.

In one embodiment, the plurality of batteries may form a battery module or a battery pack after mating.

It should be understood that the battery module includes a plurality of batteries, and the battery module may further include an end plate and a side plate for fixing the plurality of batteries. The battery module may further include a bracket to which the battery may be fixed.

The battery pack comprises a plurality of batteries and a box body, wherein the box body is used for fixing the plurality of batteries.

The battery pack includes a plurality of batteries, and the plurality of batteries are disposed in the case. Wherein, a plurality of batteries can be installed in the box after forming the battery module. Or, a plurality of batteries can be directly arranged in the box body, namely, the plurality of batteries do not need to be grouped, and the plurality of batteries are fixed by the box body.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. The specification and example embodiments are to be considered exemplary only, with a true scope and spirit of the application being indicated by the following claims. It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of protection of the application is limited only by the claims that follow.

Claims (10)

1. A battery case comprising a case body having a receiving cavity; a partition plate integrally formed with the shell body is arranged in the accommodating cavity, and the accommodating cavity is partitioned into a battery cell placing cavity and a gas exhaust cavity by the partition plate; the shell body is provided with a pressure relief structure, the pressure relief structure is located the shell body and the partition board are matched to form the side wall of the exhaust cavity, and the pressure relief structure and the partition board are arranged oppositely.

2. The battery housing of claim 1, wherein the separator is provided with a frangible portion for being ruptured by exhaust gas in the cell placement cavity.

3. The battery case according to claim 2, wherein the weak portion is a score provided in the separator; and/or the number of the groups of groups,

the weak part is a thinned part arranged on the partition board.

4. The battery case according to claim 2, wherein the weak portion is a through hole provided in the separator.

5. The battery case according to claim 4, wherein the number of the through holes is plural, and the plural through holes are arranged at intervals along the extending direction of the separator.

6. The battery housing according to any one of claims 1 to 5, wherein opposite sides of the housing body are provided with openings;

the battery shell further comprises a cover plate assembly, wherein the cover plate assembly comprises a cover plate body and a pole, and the cover plate body is buckled with the opening; the electrode post is arranged on the cover plate body and is used for connecting the battery cells in the battery cell placing cavity.

7. The battery housing of claim 6, wherein a side end surface of the separator facing the cap assembly is flush with a side end surface of the case body facing the cap assembly.

8. The battery case according to claim 6, wherein a side end surface of the separator facing the cap assembly is spaced apart from a side end surface of the case body facing the cap assembly.

9. The battery housing of any one of claims 1-5, wherein the pressure relief structure is provided in a bottom of the housing body for facing a floor of the case.

10. A battery comprising a battery housing according to any one of claims 1-9 and a cell disposed within a cell placement cavity of the battery housing.