CN216720175U - Battery box and battery package - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a battery box body and a battery pack. The battery box includes case body and partition structure, and the partition structure sets up in the case body to form battery accommodation space and exhaust space respectively in the both sides of partition structure, the gas in the battery accommodation space can be discharged through exhaust space, and the partition structure includes: a support plate; the transition plate is connected to the support plate; the isolation plate is positioned on one side of the transition plate, which is far away from the support plate; the fastener, the fastener is connected and is crossed cab apron and division board to this guarantees division board, crosses the reliable connection of cab apron and backup pad, avoids appearing the pine scheduling problem that takes off, thereby improves the security performance of battery box.

Description

Battery box and battery package

Technical Field

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

Background

In the related art, the inner space of the battery pack may include a receiving space for accommodating the battery and a venting space for venting air. Accommodation space and exhaust space are formed by a plurality of plate body partitions that are connected, because the structural constraint of each plate body, the connection stability between the plate body is relatively poor, appear not hard up scheduling problem easily.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery box body and a battery pack, which are used for improving the performance of the battery box body.

According to a first aspect of the present invention, there is provided a battery case including a case body and a partition structure provided in the case body to form a battery accommodating space and an exhaust space, respectively, on both sides of the partition structure, gas in the battery accommodating space being able to be exhausted through the exhaust space, the partition structure including:

a support plate;

the transition plate is connected to the support plate;

the isolation plate is positioned on one side of the transition plate, which is far away from the support plate;

and the fastener is connected with the transition plate and the isolation plate.

The battery box body comprises a box body and a separation structure, wherein the separation structure separates the inner space of the box body into a battery accommodating space and an exhaust space, and gas in the battery accommodating space can be collected into the exhaust space and exhausted through the separation structure, so that the overhigh pressure in the battery accommodating space is avoided. The partition structure comprises a support plate, a transition plate, a separation plate and a fastener, the transition plate is connected to the support plate, the transition plate is connected with the separation plate through the fastener, the separation plate, the transition plate and the support plate are reliably connected, the problems of loosening and the like are avoided, and the safety performance of the battery box is improved.

According to a second aspect of the present invention, there is provided a battery pack including the battery case described above.

The battery pack comprises a battery box body, wherein the battery box body comprises a box body and a separation structure, the separation structure separates the inner space of the box body into a battery accommodating space and an exhaust space, and gas in the battery accommodating space can be exhausted through the exhaust space, so that the overhigh pressure in the battery accommodating space is avoided. The partition structure comprises a support plate, a transition plate, a separation plate and a fastener, wherein the transition plate is connected to the support plate, and the transition plate is connected with the separation plate through the fastener, so that the separation plate, the transition plate and the support plate are reliably connected, the problems of loosening and the like are avoided, and the safety performance of the battery pack is improved.

Drawings

For a better understanding of the present disclosure, 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 disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art. Further, in the drawings, like reference characters designate the same or similar parts throughout the several views. Wherein:

FIG. 1 is a schematic diagram of a battery case according to an exemplary embodiment;

FIG. 2 is a schematic diagram illustrating a structure of a battery receiving space of a battery case according to an exemplary embodiment;

FIG. 3 is a schematic diagram illustrating the configuration of the vent space of a battery case according to an exemplary embodiment;

FIG. 4 is a structural schematic diagram illustrating one perspective of a partitioning structure of a battery case according to an exemplary embodiment;

FIG. 5 is a schematic diagram illustrating another perspective of a partitioning structure for a battery case according to an exemplary embodiment;

FIG. 6 is a schematic diagram of another cross-sectional configuration of a partitioning structure of a battery case according to an exemplary embodiment;

fig. 7 is a partial structural schematic view illustrating a battery pack according to an exemplary embodiment.

The reference numerals are explained below:

1. a battery module; 10. a tank body; 11. a battery accommodating space; 12. an exhaust space; 14. a base plate; 141. an exhaust through hole; 15. a frame; 16. a top cover; 20. a partition structure; 21. a support plate; 211. a through hole; 22. a transition plate; 23. a separator plate; 24. a fastener; 25. pressing a plate; 26. a void; 27. and (7) positioning the plate.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, 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 disclosure.

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

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

An embodiment of the present invention provides a battery case, referring to fig. 1 to 6, the battery case includes a case body 10 and a partition structure 20, the partition structure 20 is disposed in the case body 10 to form a battery accommodating space 11 and an exhaust space 12 on two sides of the partition structure 20, respectively, gas in the battery accommodating space 11 can be exhausted through the exhaust space 12, and the partition structure 20 includes: a support plate 21; a transition plate 22, the transition plate 22 being connected to the support plate 21; a partition plate 23, wherein the partition plate 23 is positioned on one side of the transition plate 22, which is far away from the support plate 21; fasteners 24, fasteners 24 connect transition plate 22 and spacer plate 23.

The battery box body of one embodiment of the utility model comprises a box body 10 and a separation structure 20, wherein the separation structure 20 separates the inner space of the box body 10 into a battery accommodating space 11 and an exhaust space 12, and gas in the battery accommodating space 11 can be exhausted through the exhaust space 12, so that the overhigh pressure in the battery accommodating space 11 is avoided. The partition structure 20 comprises a support plate 21, a transition plate 22, a partition plate 23 and a fastener 24, wherein the transition plate 22 is connected to the support plate 21, and the transition plate 22 and the partition plate 23 are connected through the fastener 24, so that the partition plate 23, the transition plate 22 and the support plate 21 are reliably connected, the problems of loosening and the like are avoided, and the safety performance of the battery box is improved.

The separating plate 23 is located on the side of the transition plate 22 facing away from the support plate 21, i.e. the transition plate 22 is clamped between the separating plate 23 and the support plate 21.

The fastener 24 can not penetrate through the support plate 21, and the fastener 24 connects the isolation plate 23 and the transition plate 22, so that the problem of fixing the isolation plate 23 can be solved, and the sealing performance of the support plate is improved.

The gas discharged from the battery can be collected in the gas discharge space 12 through the battery accommodation space 11 and discharged, i.e., the gas discharged from the battery enters the battery accommodation space 11 and the gas discharge space 12 in this order. The gas that has entered the exhaust space 12 can be discharged directly to the outside of the battery case from the exhaust space 12. Or, the gas entering the exhaust space 12 can be exhausted from the exhaust space 12 into other structures of the battery box body, and a refrigeration structure can be formed in the structure, so that timely heat reduction is realized, and the gas can be finally exhausted to the outer side of the battery box body.

It should be noted that there are a plurality of fasteners 24, and the plurality of fasteners 24 connect the transition plate 22 and the spacer plate 23. In this embodiment, the transition plate 22 is provided, so that the thickness of the transition plate 22 can be relatively large, and the connection stability between the transition plate 22 and the support plate 21 can be ensured, and the relatively thin isolation plate 23 is connected to the transition plate 22 through the fastener 24, so that the connection stability between the isolation plate 23 and the transition plate 22 can be ensured, and the limitation of relatively thin material can be ignored by connecting through the fastener 24.

It should be noted that the upper and lower sides of the partition structure 20 form the battery accommodating space 11 and the exhaust space 12, respectively, and it is not explicitly limited herein that the battery accommodating space 11 only includes the space on the upper side of the partition structure 20, and the exhaust space 12 only includes the space on the lower side of the partition structure 20. For example, a first groove may be provided in the upper surface of the partition structure 20, and the space of the upper surface of the partition structure 20 and the first groove may be the battery receiving space 11. A second groove may be provided in the lower surface of the partition structure 20, and in this case, the space of the lower surface of the partition structure 20 and the second groove may be the exhaust space 12.

The upper and lower sides of the partition structure 20 form the exhaust space 12 and the battery receiving space 11, respectively.

The air discharge space 12 may be located in a circumferential direction of the battery accommodating space 11, that is, the air discharge space 12 may be a circumferentially closed space structure, that is, the air discharge space 12 is disposed around the battery accommodating space 11. Alternatively, the air discharge space 12 may be a circumferentially non-closed structure, for example, only one side of the battery housing space 11 is provided with the air discharge space 12. For example, the battery accommodating space 11 may be a rectangular space, and in this case, the exhaust space 12 may be located on at least one of four circumferential outer sides of the rectangular space, so that the gas in the battery accommodating space 11 can enter the exhaust space 12 from a side portion thereof, thereby achieving pressure relief through the exhaust space 12. In one embodiment, the gas in the battery receiving space 11 can burst the partition structure 20 to be collected into the exhaust space 12 and exhausted. That is, when the battery in the battery accommodating space 11 is in a normal state, the separation structure 20 separates the battery accommodating space 11 from the exhaust space 12, and only when the battery is depressurized or the air pressure in the battery accommodating space 11 is too high due to temperature rise, the separation structure 20 can be broken, so as to relieve the pressure in the battery accommodating space 11.

In one embodiment, as shown in fig. 6, a gap 26 is formed between the support plate 21 and the partition plate 23, and at least a portion of the partition plate 23 is directly opposite to the bottom wall of the exhaust space 12, so that the gas passing through the support plate 21 can directly impact the partition plate 23 to discharge the gas into the exhaust space 12.

The transition plate 22 is used to assist in achieving the connection between the support plate 21 and the isolation plate 23, so that the transition plate 22 may not completely fill the space between the support plate 21 and the isolation plate 23, and thus, a gap 26 is formed between the support plate 21 and the isolation plate 23, so that the gas can be conveniently discharged into the exhaust space 12 through the support plate 21 and the isolation plate 23.

In one embodiment, the thickness of the support plate 21 is smaller than that of the transition plate 22, that is, the thickness of the transition plate 22 is relatively large, so that the fastening member 24 can be stably coupled, the coupling stability of the partition plate 23 and the transition plate 22 can be ensured, and the height of the gap 26 formed between the support plate 21 and the partition plate 23 can be relatively high.

In one embodiment, the support plate 21 and the transition plate 22 are two independent structures, so that the processing of the support plate 21 and the transition plate 22 can be facilitated, and no material waste is caused. For example, if the thickness of the support plate 21 is smaller than that of the transition plate 22, a large amount of waste material is generated and the efficiency is low if the support plate 21 and the transition plate 22 are integrally formed by machining or the like. Of course, in some embodiments, it is not excluded that the support plate 21 and the transition plate 22 are integrally formed.

In one embodiment, the thickness of the transition plate 22 may be not less than 2 times the thickness of the support plate 21.

In one embodiment, the materials of the support plate 21 and the transition plate 22 may be the same, for example, the support plate 21 and the transition plate 22 may both be steel. In some embodiments, the materials of the support plate 21 and the transition plate 22 may not be compatible.

In one embodiment, the support plate 21 is welded to the transition plate 22, thereby ensuring the connection stability of the support plate 21 and the transition plate 22. Since the thicknesses of the support plate 21 and the transition plate 22 are relatively large, the connection stability of the support plate 21 and the transition plate 22 after welding is also relatively high.

In one embodiment, a portion of the support plate 21 opposite to the gap 26 is provided with at least one of a weak area and a through hole 211; the thickness of the isolation plate 23 is smaller than that of the support plate 21, so that when the gas pressure in the battery accommodating space 11 reaches a preset value, the gas can break through the isolation plate 23, is collected into the exhaust space 12 and is exhausted, and therefore the situation that safety accidents are caused due to high gas pressure in the battery accommodating space 11 is avoided.

It should be noted that, when the gas pressure in the battery accommodating space 11 reaches the preset value, it is not specifically mentioned that the overall gas pressure in the battery accommodating space 11 reaches the preset value, but may also be that the local gas pressure in the battery accommodating space 11 reaches the preset value. For example, the pressure relief opening of the battery may be directly opposite to the isolation plate 23 through at least one of the weak region and the through hole 211, and at this time, the local air pressure discharged from the pressure relief opening of the battery may be relatively high, so that the isolation plate 23 may also be directly broken to be collected into the exhaust space 12 and discharged, and at this time, the air pressure at other parts of the battery accommodating space 11 may have a very small change, and in some embodiments, it is not excluded that the air pressure at other parts of the battery accommodating space 11 does not change. The gas pressure in the battery housing space 11 in the present embodiment reaches a preset value, and emphasis is placed on enabling the separator 23 to be broken.

The backup pad 21 can be a whole board, can be provided with multirow through-hole 211 in the backup pad 21, so that multirow through-hole 211 corresponds multirow battery respectively, further can be thought that every row of through-hole 211 corresponds a battery module respectively, so as to guarantee that every battery can all correspond there is through-hole 211, so as to guarantee when the pressure release condition appears to the battery, can in time with the gas outgoing in the battery box, avoid causing a series of safety problems, after all, the inside high temperature of battery box can influence the normal use of battery package.

In one embodiment, the weak region may be a valve body, which is opened when the pressure in the battery receiving space 11 reaches a preset value, thereby allowing the battery receiving space 11 and the air discharge space 12 to communicate with each other. The weak area may be like an explosion-proof structure, for example like an explosion-proof valve, which can be broken when the pressure in the battery receiving space 11 reaches a preset value, thereby allowing the battery receiving space 11 and the vent space 12 to communicate. The weak region may also be a structure having relatively low strength, such as a thin aluminum plate (partially thinned on one aluminum plate), which may be broken when the pressure in the battery receiving space reaches a preset value, thereby allowing the battery receiving space 11 and the exhaust space 12 to communicate with each other. The specific structure of the weakened area is not limited herein.

In one embodiment, the isolation plate 23 may include a relief portion, which may be a through hole. The pressure relief portion may be a valve body, which may resemble an explosion proof structure, e.g. an explosion proof valve. The relief portion may also be a relatively low strength structure such as a thin aluminum plate (e.g., a partially thinned aluminum plate).

In one embodiment, the partition plate 23 may have a constant thickness structure, and the partition plate 23 may be an aluminum plate, a copper plate, or a nickel plate, and the partition plate 23 may be broken by a certain pressure impact, thereby communicating the battery receiving space 11 with the exhaust space 12.

In one embodiment, the partition 23 may be substantially the same size as the support plate 21, in which case the entirety of the support plate 21 is not directly opposite the bottom wall of the exhaust space 12.

In one embodiment, a portion of the support plate 21 is directly opposite to the bottom wall of the exhaust space 12, i.e., the partition plate 23 may be relatively small, which not only reduces the use of materials to thereby reduce costs, but also reduces the overall weight of the battery case. Furthermore, the structures of the transition plate 22, the isolation plate 23 and the pressure plate 25 can be relatively small, the support plate 21 does not need to be completely covered, and the weight of the battery box body can be further reduced on the basis of ensuring reliable pressure relief.

In some embodiments, the partition plate 23 may be plural, and the plural partition plates 23 are provided at intervals. In the present embodiment, the number of the separators 23 may be 4, and four battery modules 1 may be disposed in the battery receiving space 11 such that one battery module 1 corresponds to one separator 23.

In some embodiments, the isolation plate 23 may be an integral structure, and the isolation plate 23 may have a plurality of through holes formed therein, so as to reduce the overall weight of the isolation plate 23.

In one embodiment, as shown in fig. 5, the partition structure 20 further includes: the pressing plate 25 is positioned below the partition plate 23, and the fastener 24 is connected with the transition plate 22, the partition plate 23 and the pressing plate 25; wherein a part of the partition plate 23 is directly opposed to the bottom wall of the exhaust space 12. The arrangement of the pressing plate 25 can further ensure the connection strength of the isolation plate 23 and the transition plate 22, and can increase the sealing performance between the isolation plate 23 and the transition plate 22, so as to ensure that the isolation plate 23 can be sufficiently broken. The pressure plate 25 may be a unitary plate provided with through holes to ensure that a portion of the partition plate 23 is directly opposite the bottom wall of the exhaust space 12. The plurality of partition plates 23 may correspond to the plurality of pressing plates 25, respectively, and the plurality of partition plates 23 may correspond to the plurality of transition plates 22, respectively.

In one embodiment, the thickness of the pressure plate 25 is greater than the thickness of the isolation plate 23, thereby ensuring that the fastener 24 can sufficiently compress the pressure plate 25 and ensure the reliability of the connection.

In one embodiment, the thickness of the pressure plate 25 is smaller than that of the transition plate 22, so that the weight of the battery case is not increased too much on the basis of ensuring the stable connection.

In some embodiments, the thickness of the separation plate 23 is less than the thickness of the pressure plate 25, the thickness of the separation plate 23 is less than the thickness of the support plate 21, the thickness of the pressure plate 25 and the thickness of the support plate 21 may be substantially the same, the thickness of the transition plate 22 may be greater than the thickness of the pressure plate 25, and the thickness of the transition plate 22 may be greater than the thickness of the support plate 21.

In one embodiment, as shown in fig. 5 and 6, the peripheral outer edge of the pressure plate 25 may extend beyond the peripheral outer edge of the partition plate 23, and the peripheral outer edge of the partition plate 23 may substantially coincide with the peripheral outer edge of the transition plate 22, which is not limited herein. The number of pressure plates 25, the number of spacer plates 23 and the number of transition plates 22 may be the same. The fasteners 24 may be screws, bolts, or the like.

In one embodiment, as shown in fig. 2, the partition structure 20 may further include a positioning plate 27, the positioning plate 27 is disposed on the support plate 21, the battery may be placed on the positioning plate 27, and the positioning plate 27 exposes the through hole 211 on the support plate 21.

In one embodiment, as shown in fig. 1 to 4, the tank body 10 includes: a base plate 14; a frame 15, wherein the frame 15 is arranged around the bottom plate 14; the partition structure 20 is disposed on the frame 15. At least one of the bottom plate 14 and the frame 15 is provided with a vent hole 141, and the gas discharged from the battery can be collected into the vent space 12 through the partition structure 20 and discharged through the vent hole 141, thereby preventing an accident caused by an excessive pressure in the battery accommodating space 11.

It should be noted that the frame 15 is not specifically referred to as being disposed around the bottom plate 14, and it is important to note that the frame 15 forms a circumferentially closed space. The rim 15 is connected to the bottom plate 14, and the rim 15 may be provided on the bottom plate 14, or the rim 15 may be connected to a circumferential edge of the bottom plate 14, without limitation, such that the top cover 16 is connected to the rim 15 and is disposed opposite to the partition structure 20, so that the box body 10 may form a closed space, as shown in fig. 1.

The bottom plate 14 may be used to shield the bottom of the battery case, and the specific structure of the bottom plate 14 is not limited. The frame 15 is connected to the bottom plate 14, and the frame 15 may be formed by splicing a plurality of beam members, or the frame 15 may be an integral plate-shaped structure to enclose a circumferential closed space.

At least one of the bottom plate 14 and the frame 15 is provided with a vent hole 141 so that the gas in the vent space 12 can be discharged in time. The inside of the exhaust through hole 141 may not be provided with other structures, and in this case, the exhaust space 12 may be directly connected to the outside through the exhaust through hole 141.

Other structures, such as a valve body, a similar explosion-proof valve, etc., may be provided inside the exhaust through hole 141, and when the pressure in the exhaust space 12 reaches a certain value, the above-mentioned structures may be broken, thereby achieving the exhaust. The specific structure of the exhaust through hole 141 is not limited, and may be a hole, a polygonal hole, a shaped hole, or the like. The exhaust through-holes 141 may be directly provided on the base plate 14 or the frame 15. Alternatively, the venting through-hole 141 may be provided on the pressure relief structure, and the pressure relief structure is provided on the bottom plate 14 or the bezel 15.

The battery receiving space 11 may not be provided with any other partition structure therein, i.e., the battery receiving space 11 is a receiving space. Alternatively, other partition structures may be provided inside the battery receiving space 11, for example, at least one beam is provided inside the battery receiving space 11, thereby forming at least two receiving spaces.

The inside of the exhaust space 12 may not be provided with other partition structures, i.e., the exhaust space 12 is a space. Alternatively, other partitioning structures may be provided inside the exhaust space 12, for example, at least one beam is provided inside the exhaust space 12, so as to form at least two spaces, which may or may not be connected.

An embodiment of the utility model also provides a battery pack which comprises the battery box body.

The battery pack of one embodiment of the utility model comprises a battery box body, wherein the battery box body comprises a box body 10 and a separation structure 20, the separation structure 20 separates the inner space of the box body 10 into a battery accommodating space 11 and an exhaust space 12, and gas in the battery accommodating space 11 can be collected into the exhaust space 12 through the separation structure 20 and exhausted, so that the overhigh pressure in the battery accommodating space 11 is avoided. The partition structure 20 includes a support plate 21, a transition plate 22, a spacer plate 23, and a fastener 24, and by connecting the transition plate 22 to the support plate 21 and connecting the transition plate 22 and the spacer plate 23 by the fastener 24, the spacer plate 23, the transition plate 22, and the support plate 21 are reliably connected, and the occurrence of problems such as loosening is avoided, thereby improving the safety performance of the battery pack.

In one embodiment, the battery pack further includes a battery including a cell and an electrolyte, a minimum unit capable of performing an electrochemical reaction such as charging/discharging. The battery cell refers to a unit formed by winding or laminating a stack including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first electrode and the second electrode can be interchanged. The battery core is arranged in the battery shell. The battery is for being disposed in the battery receiving space 11.

A plurality of batteries may be disposed in the battery case after forming the battery module 1, as shown in fig. 7, and the plurality of batteries may be fixed by end plates and side plates. A plurality of batteries can directly set up in the battery box, need not to pack a plurality of batteries promptly, and at this moment, can get rid of end plate and curb plate.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A battery box body, characterized by, including case body (10) and partition structure (20), partition structure (20) set up in case body (10) to form battery accommodation space (11) and exhaust space (12) respectively in the both sides of partition structure (20), the gas in battery accommodation space (11) can be through exhaust space (12) is discharged, partition structure (20) includes:

a support plate (21);

a transition plate (22), the transition plate (22) being connected to the support plate (21);

a separating plate (23), wherein the separating plate (23) is positioned on the side of the transition plate (22) facing away from the supporting plate (21);

a fastener (24), the fastener (24) connecting the transition plate (22) and the isolation plate (23).

2. The battery case according to claim 1, wherein a space (26) is formed between the support plate (21) and the separator plate (23), and at least a part of the separator plate (23) is directly opposed to a bottom wall of the exhaust space (12).

3. The battery case according to claim 1 or 2, wherein the support plate (21) has a thickness smaller than that of the transition plate (22).

4. The battery case according to claim 3, wherein the support plate (21) and the transition plate (22) are independent two structures.

5. The battery case according to claim 2, wherein a portion of the support plate (21) opposite to the gap (26) is provided with at least one of a weak area and a through hole (211);

the thickness of the isolation plate (23) is smaller than that of the support plate (21), so that when the gas pressure in the battery accommodating space (11) reaches a preset value, the gas can break through the isolation plate (23), is collected in the exhaust space (12) and is exhausted.

6. The battery case according to claim 5, wherein the separator (23) is a steel plate, an aluminum plate, a copper plate, or a nickel plate.

7. The battery case according to claim 5, wherein a portion of the support plate (21) is directly opposite to a bottom wall of the exhaust space (12).

8. The battery box according to claim 1 or 2, characterized in that the partition structure (20) further comprises:

a pressure plate (25), the pressure plate (25) being located below the partition plate (23), the fastener (24) connecting the transition plate (22), the partition plate (23), and the pressure plate (25);

wherein a portion of the partition plate (23) is directly opposed to a bottom wall of the exhaust space (12).

9. The battery case according to claim 8, wherein the thickness of the pressure plate (25) is greater than the thickness of the separator plate (23), and/or the thickness of the pressure plate (25) is less than the thickness of the transition plate (22).

10. A battery pack characterized by comprising the battery case of any one of claims 1 to 9.

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