WO2024036834A1

WO2024036834A1 - Battery module with inverted cells

Info

Publication number: WO2024036834A1
Application number: PCT/CN2022/137832
Authority: WO
Inventors: 黄伟; 唐中原; 马建生; 范风魁; 雷蕾; 李鹏; 张洪雷; 张旭; 戴大力
Original assignee: 合众新能源汽车股份有限公司
Priority date: 2022-08-18
Filing date: 2022-12-09
Publication date: 2024-02-22
Also published as: CN115275494A; CN115275494B

Abstract

The present disclosure relates to a battery module with inverted cells, comprising: a cell assembly formed by a plurality of inverted cells; end plates arranged at two opposite ends of the cell assembly; side plates arranged at two opposite sides of the cell assembly and extending perpendicular to the end plates; and a thermal protection assembly arranged at the bottom of the cell assembly, wherein the thermal protection assembly comprises at least one of buffer supporting elements used for supporting cell bodies, first thermal protection elements arranged below the parts where poles of the cells are located, and second thermal protection elements arranged below the parts where explosion-proof valves of the cells are located. According to the battery module of the present disclosure, the problem in the prior art of poor maintainability of battery modules is solved, the impact on a passenger compartment when explosion-proof valves of cells are opened is avoided, and thermal protection and electricity protection are achieved at the same time, such that the safety of the battery module is improved.

Description

Inverted cell battery module

Technical field

The present disclosure relates generally to the technical field of batteries. More particularly, the present disclosure relates to an inverted cell battery module.

Background technique

With the rapid development of electric vehicles, battery technology is also constantly making breakthroughs. In recent years, two battery-body integration technologies, Cell to Body (CTB: Cell To Body) and Cell to Chassis (CTC: Cell To Chassis), have been known, which have significant impacts on body structure, manufacturing costs, battery life, etc. There are very obvious improvements. However, with the development of highly integrated solutions, how to solve security-related issues also requires more in-depth research.

At present, the main development direction of CTB and CTC technology is to integrate the upper cover of the battery system with the body floor to achieve cost and space optimization. However, CTB and CTC technologies have the following two key problems: First, the risk of battery thermal runaway impact on the passenger compartment caused by CTB and CTC technologies is greatly increased; second, after-sales problems brought by CTB and CTC technologies Problems of repair and poor maintainability.

Contents of the invention

It is an object of the present disclosure to overcome at least one drawback in the prior art.

The present disclosure provides an inverted cell battery module, including: a cell assembly formed by a plurality of inverted cells; end plates provided at opposite ends of the cell assembly; Side plates extending on opposite sides and perpendicular to the end plate; and a thermal protection component disposed at the bottom of the battery core assembly, wherein the thermal protection component includes a buffer for supporting the body of each battery core At least one of the supporting element, a first thermal protection element disposed under the position where the pole of each battery core is located, and a second thermal protection element disposed below the position where the explosion-proof valve of each battery core is located. .

According to an embodiment of the present disclosure, the cushioning support element is configured as a cushioning support pad, the cushioning support pad includes a first support pad part and a second support pad part disposed below the first support pad part, the The second support pad portion includes a plurality of flow channels for releasing fluid.

According to one embodiment of the present disclosure, the first support pad portion is constructed in one piece, and the second support pad portion is configured to include a discrete plurality of second support pad portions, wherein the discrete plurality of second support pad portions The second support pad portions are spaced apart from each other to form the flow channel between two adjacent second support pad portions.

According to one embodiment of the present disclosure, the second support pad portion of the cushion support pad is bonded below the first support pad portion.

According to one embodiment of the present disclosure, the first support pad portion of the cushion support pad is made of a relatively soft material, and the second support pad portion of the cushion support pad is made of a relatively hard material.

According to one embodiment of the present disclosure, the first support pad portion of the cushion support pad is made of a compressible and resilient material, and the second support pad portion of the cushion support pad is made of a substantially incompressible material. become.

According to one embodiment of the present disclosure, the first support pad part of the cushion support pad is made of rubber or foam, and the second support pad part of the cushion support pad is made of insulating plastic.

According to an embodiment of the present disclosure, the poles and explosion-proof valves of each cell in the cell assembly divide the bottom of the cell assembly into a middle part and a side part, and the buffer support element includes a plurality of buffers Support elements, the plurality of buffer support elements are respectively disposed under the middle part and the side parts of the battery core assembly.

According to an embodiment of the present disclosure, the first thermal protection element is made of ceramic, silicone rubber, or mica plate.

According to an embodiment of the present disclosure, the second thermal protection element includes a base body and a plurality of recessed portions disposed in the base body, each recessed portion is used to accommodate an explosion-proof valve, wherein each recessed portion has a bottom, The base body of the second thermal protection element forms a thicker portion and the bottom of each recess forms a thinner portion.

According to an embodiment of the present disclosure, the thicker portion of the second thermal protection element has a thickness of between 1 and 3 mm.

According to one embodiment of the present disclosure, the thinner portion of the second thermal protection element has a thickness of between 0.3 and 0.5 mm.

According to one embodiment of the present disclosure, the second thermal protection element is made of a first sheet and a second sheet, the second sheet including a plurality of through holes extending through the second sheet, and wherein , the first sheet is disposed below the second sheet, thereby forming the plurality of bottoms of the second thermal protection element together with the plurality of through holes of the second sheet. depression.

According to an embodiment of the present disclosure, the first sheet is mica paper, and the second sheet is a mica plate including a plurality of through holes.

According to an embodiment of the present disclosure, the mica paper is bonded below the mica plate.

According to an embodiment of the present disclosure, there is a height difference between the bottom of the end plate and the pole of the battery cell, so that when the cell inverted battery module is supported through the end plate, the battery core There is an exhaust gap between the assembly and the plane where the bottom of the end plate lies.

According to an embodiment of the present disclosure, the height difference is between 2 and 5 mm.

According to one embodiment of the present disclosure, the inverted cell battery module further includes an insulation disposed between the end plate and the cell assembly and/or between the side plate and the cell assembly. part.

According to an embodiment of the present disclosure, the insulating component disposed between the end plate and the battery core assembly is made of polycarbonate material.

According to an embodiment of the present disclosure, the insulating component disposed between the side plate and the battery core assembly is made of hot-pressed polyethylene terephthalate material.

According to an embodiment of the present disclosure, the battery core assembly is fixed to the end plate and the side plate through structural glue.

According to an embodiment of the present disclosure, the thermal protection component is bonded to the bottom of the battery core component.

According to an embodiment of the present disclosure, the end plate and the side plate are connected to each other using self-piercing rivets.

According to one embodiment of the present disclosure, the top of the inverted-cell battery module does not include a top plate, and a cooling system is provided on the top of the inverted-cell battery module.

According to an embodiment of the present disclosure, the battery core is a square battery core.

It is noted that aspects of the disclosure described with respect to one embodiment may be incorporated into other different embodiments although not specifically described with respect to the other different embodiments. In other words, all embodiments may be combined in any way and/or combination and/or features of any embodiment may be combined, as long as they do not contradict each other.

Description of drawings

Various aspects of the present disclosure will be better understood upon reading the following detailed description in conjunction with the accompanying drawings, in which:

1 is a schematic perspective view of a battery module according to one embodiment of the present disclosure.

FIG. 2 is an disassembled view of the battery module shown in FIG. 1 .

3 is a schematic perspective view of a buffer support element of a battery module according to one embodiment of the present disclosure.

4 is a schematic perspective view of a second thermal protection element disposed below the location of the explosion-proof valve of each cell of the battery module according to an embodiment of the present disclosure.

Figure 5 shows the height difference between the bottom of the end plate of the battery module and the pole of the battery cell according to one embodiment of the present disclosure.

It should be understood that throughout the drawings, the same reference numbers refer to the same elements. In the drawings, the dimensions of certain features may vary and are not drawn to scale for clarity.

Detailed ways

The present disclosure will be described below with reference to the accompanying drawings, in which several embodiments of the disclosure are shown. However, it should be understood that the present disclosure may be presented in many different ways and is not limited to the embodiments described below; in fact, the embodiments described below are intended to make the disclosure more complete and to provide Those skilled in the art will fully understand the scope of the present disclosure. It should also be understood that the embodiments disclosed herein can be combined in various ways to provide yet more additional embodiments.

It should be understood that the terms used in the specification are used to describe specific embodiments only and are not intended to limit the disclosure. All terms (including technical terms and scientific terms) used in the specification have the meanings commonly understood by those skilled in the art unless otherwise defined. For the sake of conciseness and/or clarity, well-known functions or structures may not be described in detail.

When used in the specification, the singular forms "a", "the" and "the" include the plural forms unless expressly stated otherwise. The specification uses the terms "includes," "includes," and "containing" to indicate the presence of claimed features but does not exclude the presence of one or more other features. As used in this specification, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the specification, an element is referred to as being "on," "attached to," "connected to" another element, "coupled to" another element, or "contacting" another element. The element can be directly on, attached to, connected to, coupled to, or contacting another element, or intervening elements may be present.

In the specification, the terms "first", "second", "third", etc. are only used to facilitate explanation and are not intended to be limiting. Any technical features represented by "first", "second", "third", etc. are interchangeable.

In the description, spatial relationship terms such as "upper", "lower", "front", "back", "top", "bottom", etc. may describe the relationship of one feature to another feature in the drawings. It will be understood that the spatially relative terms encompass different orientations of the device in use or operation in addition to the orientation depicted in the drawings. For example, if the device in the figures is turned over, features described as "below" other features would now be described as "above" other features. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the relative spatial relationships will be interpreted accordingly.

Referring to FIGS. 1 and 2 , a battery module 100 is shown according to one embodiment of the present disclosure. The battery module 100 may include a battery cell assembly 110, end plates 120 disposed at opposite ends of the battery cell assembly 110, side plates 130 disposed at opposite sides of the battery cell assembly 110 and extending perpendicularly to the end plates 120, and The thermal protection component 140 at the bottom of the cell assembly 110 .

The battery cell assembly 110 may include a plurality of battery cells 111 . The plurality of cells 111 of the cell assembly 110 may be bonded, bundled, or otherwise combined together, or may be separable from each other without being combined together. In one embodiment according to the present disclosure, each battery cell 111 may be a square battery cell, as shown in FIG. 1 . Each battery core 111 may include a pole 112 and an explosion-proof valve 113 provided at one end of the battery core 111 . Posts 112 may include positive and negative posts. In other embodiments according to the present disclosure, each battery core 101 may also be a cylindrical battery core or other suitable type of battery core.

In an embodiment according to the present disclosure, each battery core 111 in the battery core assembly 110 is disposed upside down, so that when the battery core assembly 110 is formed, the pole 112 and the explosion-proof valve 113 of each battery core 111 are located on the battery core. The bottom of the assembly 110, and when the battery module 100 is installed in the vehicle, the pole 112 and the explosion-proof valve 113 of each battery cell 111 are facing downward (for example, toward the ground). Therefore, the battery module 100 according to the present disclosure may be called an "inverted cell battery module." Such an arrangement can not only avoid impact on the passenger compartment when the explosion-proof valve 113 of the corresponding cell in the battery module 100 is opened, thereby greatly improving the safety of the battery system in the vehicle, but also greatly improve the safety of the battery module 100 The convenience of after-sales repair and the maintainability of the battery module 100.

The end plate 120 and the side plate 130 may form a frame structure of the battery module 100 . In one embodiment according to the present disclosure, the end plates 120 may be cast aluminum end plates and the side plates 130 may be extruded aluminum side plates. One or more lugs 121 may be provided on the outside of the end plate 120 . The battery module 100 can be integrated directly into place within the vehicle by means of the lugs 121 . The end plate 120 and the side plate 130 may be connected to each other using self-piercing rivets 122 .

In one embodiment according to the present disclosure, an insulating component 123 may be disposed between the end plate 120 and the cell assembly 110 . The insulation member 123 may be made of polycarbonate (PC) material. Correspondingly, an insulating component may also be provided between the side plate 130 and the cell assembly 110 . The insulating component disposed between the side plate 130 and the cell assembly 110 may be made of heat-pressed polyethylene terephthalate (PET) material.

In one embodiment according to the present disclosure, the cell assembly 110 may be fixed on the end plate 120 and the side plate 130 through structural glue, or in a structural frame formed by the end plate 120 and the side plate 130 .

Next, the thermal protection component 140 disposed at the bottom of the cell assembly 110 will be described in detail.

As shown more clearly in FIG. 2 , the thermal protection assembly 140 may include a buffer support element 141 for supporting the body of each battery core 111 , and a buffer support element 141 disposed under the location where the pole post 112 of each battery core 111 is located. At least one or all of the first thermal protection element 142 and the second thermal protection element 143 disposed below the location where the explosion-proof valve 113 of each battery core 111 is located.

In one embodiment according to the present disclosure, the cushion support element 141 may be configured as a cushion support pad. The cushioning support pad may include a first support pad portion 1411 and a second support pad portion 1412 disposed below the first support pad portion 1411, as shown in Figure 3 . The first support pad part 1411 may directly contact and support the body of the battery core 111 .

The first support pad portion 1411 may be made of a relatively soft material (compared to the material of the second support pad portion) to provide a certain compression and cushioning effect while supporting the body of each battery cell 111 . For example, the first support pad portion 1411 may be made of a compressible and resilient material, including but not limited to rubber, foam, and any other suitable compressible and resilient material known or unknown in the art. .

The second support pad portion 1412 may be made of a relatively harder material (compared to the material of the first support pad portion 1411 ). For example, the second support pad portion 1412 may be made from a substantially incompressible material, including, but not limited to, insulating plastic and any other suitable substantially incompressible material known or unknown in the art. The second support pad portion 1412 may be an injection molded substantially incompressible injection molded part. In one embodiment according to the present disclosure, the second support pad portion 1412 may include a plurality of flow channels 1413 for releasing fluid, so that the second support pad portion 1412 can support the battery core 111 while ensuring thermal runaway of the battery core 111 The heat and gas can be released normally through the flow channel 1413. As shown more clearly in FIG. 3 , the flow channel 1413 may extend in a transverse direction transverse to the direction in which the second support pad portion 1412 extends.

In one embodiment according to the present disclosure, the first support pad portion 1411 and the second support pad portion 1412 may both be constructed in one piece. In this embodiment, a plurality of flow channels 1413 may be provided in a portion of the thickness of the second support pad portion 1412. In another embodiment according to the present disclosure, the first support pad portion 1411 may be configured to be integral, and the second support pad portion 1412 may be configured to include a discrete plurality of second support pad portions. The discrete plurality of second support pad portions may be spaced apart from each other to form a flow channel 1413 for releasing fluid between two adjacent second support pad portions.

In one embodiment according to the present disclosure, the first support pad portion 1411 and the second support pad portion 1412 may be bonded to each other. However, the present disclosure is not limited thereto. The first support pad part 1411 and the second support pad part 1412 may also be connected to each other by any suitable means, including but not limited to hot melt connection, snap connection, form-fit connection, indirect connection by means of mechanical connection elements, and any other suitable connection means known or unknown in the art.

Considering that the pole 112 and the explosion-proof valve 113 of each battery core 111 will divide the bottom of the battery core assembly 110 into one or more middle parts and one or more side parts, in one embodiment according to the present disclosure, the buffer The support member 141 may be configured to include a plurality of buffer support members separated from each other, and the plurality of buffer support members may be respectively disposed under the middle portion and the side portion of the battery cell assembly 110 . In the embodiment shown in FIGS. 2 and 3 , the poles 112 of the battery core 111 and the explosion-proof valve 113 divide the bottom of the battery core assembly 110 into two middle parts and two side parts. Therefore, four mutually disposed Separate cushioning support element 141 . In one embodiment according to the present disclosure, each cushioning support element 141 may have substantially the same structure. However, each buffer support element 141 may have the same or a different width than the other buffer support elements, depending on the width of the middle portion and side portions of the bottom of the cell assembly 110 .

Referring to FIG. 2 , in one embodiment according to the present disclosure, the thermal protection assembly 140 may further include a first thermal protection element 142 disposed below the location where the pole 112 of each battery core 111 is located. The first thermal protection element 142 can be configured in the form of a plate-like or sheet-like thermal protection mat. The first thermal protection element 142 is configured to have strong insulation and voltage resistance performance at high temperatures to ensure that the risk of high-voltage insulation when the battery core 111 is thermally runaway is controllable, thereby at least partially achieving joint thermal/electrical protection. Effect. In order to achieve strong insulation and voltage resistance performance of the first thermal protection element 142 at high temperatures, in one embodiment according to the present disclosure, the first thermal protection element 142 can be made of ceramic, silicone rubber, mica plate, or any other material in the art. other suitable materials, known or unknown. The first thermal protection element 142 may be disposed in direct contact with the pole 112 of each battery core 111 .

Referring to FIG. 2 or FIG. 4 , in one embodiment according to the present disclosure, the thermal protection assembly 140 may further include a second thermal protection element 143 disposed below the location where the explosion-proof valve 113 of each battery core 111 is located. The second thermal protection element 143 may be configured as a thermal protection plate. The second thermal protection element 143 may include a base body 1431 and a recess 1432 provided in the base body 1431 . The recess 1432 is used to accommodate the explosion-proof valve 113 of the battery core 111 . The recess 1432 may have a bottom such that the base 1431 of the second thermal protection element forms a thicker portion of the second thermal protection element and the bottom of the recess 1432 of the second thermal protection element forms a thinner portion of the second thermal protection element. When the second thermal protection element 143 is disposed below the location where the explosion-proof valve 113 of each battery core 111 of the battery assembly 110 is located, the explosion-proof valve 113 is accommodated in the recess 1432 of the second thermal protection element 143 and is The thinner part of the second thermal protection element is supported, while the position without the explosion-proof valve is supported by the thicker part of the second thermal protection element 143 .

The thicker part of the second thermal protection element 143 can prevent other parts of the battery core (such as the battery core shoulder) from being impacted by the flame and causing the spread of thermal runaway when the battery core is thermally runaway. In one embodiment according to the present disclosure, the thicker portion of the second thermal protection element 143 may be configured to have a thickness of between 1 and 3 mm, alternatively with a thickness of 1.5 or 2 mm.

The thinner part of the second thermal protection element 143 can ensure the normal opening of the explosion-proof valve 113 when the battery core is thermally out of control, and can also protect the explosion-proof valves of other battery cores that have not been thermally runaway from the impact of the reverse flame, thereby avoiding the impact of the reverse flame. This results in the spread of thermal runaway. In one embodiment according to the present disclosure, the thinner portion of the second thermal protection element 143 may be configured to have a thickness of between 0.3 and 0.5 mm.

In one embodiment in accordance with the present disclosure, the second thermal protection element 143 may be made from a first sheet of material and a second sheet of material. The second sheet may include a plurality of through holes extending through the second sheet. The first sheet may not have through holes and may be disposed below the second sheet, thereby forming a plurality of recessed portions with bottoms of the second thermal protection element 143 together with the plurality of through holes of the second sheet. In this embodiment, the first sheet may be adhesively connected to the second sheet. In one embodiment according to the present disclosure, the first sheet may be mica paper, and the second sheet may be a mica plate including a plurality of through holes. Mica paper may be bonded underneath the mica plate to form the second thermal protection element 143 .

In other embodiments according to the present disclosure, the second thermal protection element 143 may be constructed as a single piece, and the recessed portion 1432 may be formed in the second thermal protection element 143 by any suitable means (eg, machining, ablation, etching, molding, etc.). Two thermal protection elements 143.

In one embodiment according to the present disclosure, the thermal protection assembly 140 (ie, at least one or all of the buffer support element 141, the first thermal protection element 142, and the second thermal protection element 143) can be bonded to the battery core assembly 110 bottom of. Double-sided tape can be initially provided on each component of the thermal protection assembly 140, and then pressed against the bottom of the battery cell assembly 110 using the fixed pressing force of the module when assembling the battery module.

By means of the thermal protection component 140 disposed at the bottom of the battery core assembly 110 according to the present disclosure, the battery module 100 of the present disclosure achieves thermal/electrical separation (the poles and the explosion-proof valve are respectively isolated from each other by different thermal protection components. protection) and thermal/electrical joint protection, thereby greatly improving the safety of the battery module 100 according to the present disclosure.

In one embodiment according to the present disclosure, when the battery core module 100 is assembled, there may be a certain height difference H between the bottom of the end plate 120 and the poles 112 of the battery core 111, so that the end plate 120 supports When the battery module 100 is installed, there is an exhaust gap between the cell assembly 110 and the plane where the bottom of the end plate 120 is located. This can not only effectively and promptly discharge the heat and gas during thermal runaway of the battery core, but also avoid the insulation risk caused by the falling of the battery core assembly 110 or the battery core 111 to contact other metal parts, thus further improving the The thermal/electricity joint protection effect and safety of the battery module according to the present disclosure. In one embodiment according to the present disclosure, the height difference H between the bottom of the end plate 120 and the pole 112 of the battery core 111 may be between 2 and 5 mm.

In one embodiment according to the present disclosure, the top of the battery module 100 may not include a top plate. The cooling system can be disposed on the top of the battery module 100 to cool the cells 111 in the battery module 100 .

The battery module 100 according to the present disclosure can be directly integrated into the vehicle in an inverted manner. After being integrated into the vehicle, since the poles and explosion-proof valves of the battery core are facing downwards, it can not only solve the problem of poor maintainability of the existing CTC and CTB technologies, but also avoid damage to the passenger compartment when the explosion-proof valve of the battery core is opened. impact. In addition, the arrangement of the thermal protection component 140 at the bottom of the battery module 100 further achieves the technical effects of thermal/electrical separation and thermal/electrical joint protection. Therefore, the safety of the battery module 100 according to the present disclosure is greatly improved. improve.

Exemplary embodiments according to the present disclosure are described above with reference to the accompanying drawings. However, those skilled in the art will appreciate that various changes and modifications can be made to the exemplary embodiments of the present disclosure without departing from the spirit and scope of the present disclosure. All changes and modifications are included within the scope of the present disclosure as defined by the claims. The disclosure is defined by the appended claims and equivalents of these claims are intended to be included therein.

Claims

An inverted cell battery module, including:

A cell assembly formed by multiple inverted cells;

End plates provided at opposite ends of the battery core assembly;

Side plates provided on opposite sides of the cell assembly and extending perpendicularly to the end plates; and

a thermal protection component provided at the bottom of the battery core component,

Wherein, the thermal protection assembly includes a buffer support element for supporting the body of each battery core, a first thermal protection element disposed below the location of the pole of each battery core, and a first thermal protection component disposed on each battery core. The explosion-proof valve is located below at least one of the second thermal protection elements.
The inverted cell battery module according to claim 1, wherein the buffer support element is configured as a buffer support pad, and the buffer support pad includes a first support pad part and is disposed below the first support pad part. A second support pad portion, the second support pad portion includes a plurality of flow channels for releasing fluid.
The inverted cell battery module of claim 2, wherein the first support pad portion is configured to be integral, and the second support pad portion is configured to include a plurality of discrete second support pad portions. , wherein the discrete plurality of second support pad portions are spaced apart from each other to form the flow channel between two adjacent second support pad portions.
The inverted cell battery module of claim 2, wherein the second support pad portion of the buffer support pad is bonded below the first support pad portion.
The inverted cell battery module according to claim 2, wherein the first support pad part of the cushion support pad is made of a relatively soft material, and the second support pad part of the cushion support pad is made of Made of relatively hard material.
The inverted cell battery module of claim 5, wherein the first support pad portion of the cushion support pad is made of a compressible and resilient material, and the second support portion of the cushion support pad The pad portion is made of a substantially incompressible material.
The inverted cell battery module according to claim 5, wherein the first support pad part of the cushion support pad is made of rubber or foam, and the second support pad part of the cushion support pad is made of insulating material. Made of plastic.
The cell inverted battery module according to any one of claims 1 to 7, wherein the pole and explosion-proof valve of each cell in the cell assembly divide the bottom of the cell assembly into The middle part and the side part, the buffer support element includes a plurality of buffer support elements, the plurality of buffer support elements are respectively disposed under the middle part and the side part of the battery core assembly.
The inverted cell battery module according to any one of claims 1 to 7, wherein the first thermal protection element is made of ceramic, silicone rubber, or mica plate.
The inverted cell battery module according to any one of claims 1 to 7, wherein the second thermal protection element includes a base body and a plurality of recessed portions disposed in the base body, each recessed portion For accommodating an explosion-proof valve, wherein each recessed portion has a bottom such that the base of the second thermal protection element forms a thicker portion and the bottom of each recessed portion forms a thinner portion.
The inverted cell battery module of claim 10, wherein the thicker portion of the second thermal protection element has a thickness of between 1 and 3 mm.
The inverted cell battery module of claim 10, wherein the thinner portion of the second thermal protection element has a thickness of between 0.3 and 0.5 mm.
The inverted cell battery module of claim 10, wherein the second thermal protection element is made of a first sheet and a second sheet, and the second sheet includes a plurality of through-holes of two sheets, and wherein the first sheet is disposed below the second sheet, thereby forming the second thermal protection together with the plurality of through-holes of the second sheet The plurality of recessed portions of the element have bottoms.
The inverted cell battery module of claim 13, wherein the first sheet is mica paper, and the second sheet is a mica plate including a plurality of through holes.
The inverted cell battery module according to claim 14, wherein the mica paper is bonded below the mica plate.
The inverted cell battery module according to any one of claims 1 to 7, wherein there is a height difference between the bottom of the end plate and the pole of the cell, so that through the end plate When supporting the inverted cell battery module, there is an exhaust gap between the cell assembly and the plane where the bottom of the end plate is located.
The inverted cell battery module according to claim 16, wherein the height difference is between 2 and 5 mm.
The inverted cell battery module according to any one of claims 1 to 7, wherein the inverted cell battery module further includes a /or an insulating component between the side plate and the battery core assembly.
The inverted cell battery module of claim 18, wherein the insulating component disposed between the end plate and the cell assembly is made of polycarbonate material.
The inverted cell battery module of claim 18, wherein the insulating component disposed between the side plate and the cell assembly is made of hot-pressed polyethylene terephthalate material.
The inverted cell battery module according to any one of claims 1 to 7, wherein the cell assembly is fixed on the end plate and the side plate through structural glue.
The inverted battery module according to any one of claims 1 to 7, wherein the thermal protection component is bonded to the bottom of the battery component.
The inverted cell battery module according to any one of claims 1 to 7, wherein the end plate and the side plate are connected to each other using self-piercing rivets.
The inverted cell battery module according to any one of claims 1 to 7, wherein the top of the inverted cell battery module does not include a top plate, and the inverted cell battery module There is a cooling system on the top.
The inverted cell battery module according to any one of claims 1 to 7, wherein the cell is a square cell.