Support and housing assembly

Abstract

This invention relates to the field of battery technology, providing a support member and a housing assembly. The support member is located at the bottom of the housing body to isolate the explosion-proof valve from the electrode assembly. The support member includes: an isolation plate, a support portion on the outer periphery of the bottom surface of the isolation plate for connecting to the housing body, and vent holes on the isolation plate to connect the electrode assembly and the explosion-proof valve. This invention, by providing a support portion on the outer periphery of the bottom surface of the isolation plate, which abuts against the housing body, isolates the electrode assembly from the explosion-proof valve during the insertion of the electrode assembly into the housing, preventing squeezing or scraping between the electrode assembly and the explosion-proof valve, thereby protecting the electrode assembly from damage. The connection between the support portion and the housing body increases the distance between the isolation plate and the explosion-proof valve, providing deformation space for the explosion-proof valve and preventing blockage. The vent holes on the isolation plate allow the explosion-proof valve to open when the internal pressure is too high, releasing excess internal pressure, thus ensuring high safety.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and in particular to a support member and housing assembly. Background Technology

[0002] With the global pursuit of clean energy and sustainable development, lithium-ion battery technology has developed rapidly and matured in recent years. Due to its advantages such as high energy density, long cycle life, and relatively low self-discharge rate, lithium-ion batteries are widely used as power batteries in electric vehicles and energy storage. In these applications, increasingly stringent requirements are placed on the performance and safety of lithium-ion batteries. Battery performance not only affects the operating efficiency and range of equipment but also directly impacts user safety and equipment reliability.

[0003] As the core component of a battery pack, the safety of lithium-ion battery cells and their assembly performance within the pack play a decisive role in the stable operation of the entire battery system. Therefore, the structural design of lithium-ion battery cells has become a key factor in ensuring cell safety and has attracted significant industry attention.

[0004] Currently, during the battery casing process, the electrode assembly is prone to being squeezed against the explosion-proof valve, resulting in scraping and blockage, which affects battery safety. Summary of the Invention

[0005] This invention provides a support member and a housing assembly to solve the problem in the prior art where the electrode assembly is easily squeezed against the explosion-proof valve during the installation process, resulting in scraping and blockage, which affects battery safety.

[0006] The present invention provides a support member disposed at the bottom of the shell body to isolate the explosion-proof valve from the electrode assembly; the support member includes: an isolation plate, a support portion provided on the outer periphery of the bottom surface of the isolation plate, the support portion being used to abut against the shell body, and a vent hole provided on the isolation plate to connect the electrode assembly and the explosion-proof valve.

[0007] According to a support member provided by the present invention, the support includes two first support portions and two second support portions, the two first support portions being disposed on both sides of the isolation plate in the width direction, and the two second support portions being disposed on both sides of the isolation plate in the length direction.

[0008] According to a support member provided by the present invention, there is a gap between the second support portion and the two first support portions.

[0009] According to a support member provided by the present invention, the isolation plate includes a first isolation portion, a second isolation portion and a third isolation portion, the first isolation portion and the third isolation portion are located on both sides of the length direction of the second isolation portion, the first isolation portion and the third isolation portion are semi-circular plates, the second isolation portion is a rectangular plate, and in the width direction of the isolation plate, the center lines of the two second support portions are collinear with the center line of the second isolation portion.

[0010] According to a support member provided by the present invention, the thickness of the support portion is H1, 0.15mm≤H1≤1.5mm; the sum of the thicknesses of the support portion and the isolation plate is T, 0.65mm≤T≤3.5mm.

[0011] According to a support member provided by the present invention, there are multiple vent holes, which are spaced apart along the length direction of the partition plate; and / or, the multiple vent holes are spaced apart along the width direction of the partition plate.

[0012] The present invention also provides a housing assembly, including a support member as described in any of the above claims, and further including a housing body and an explosion-proof valve. The housing body has a receiving cavity with openings at both ends along its length, and the receiving cavity is used to receive an electrode assembly. The bottom surface of the housing body has a mounting port, and the explosion-proof valve is disposed at the mounting port. The support member is disposed within the receiving cavity, located between the electrode assembly and the explosion-proof valve.

[0013] According to a housing assembly provided by the present invention, the bottom surface of the housing body is provided with a protrusion, the protrusion having a first channel, a second channel, and a third channel that communicate with each other. The first channel, the second channel, and the third channel are coaxially arranged, the first channel and the third channel are respectively located on both sides of the second channel, the cross-sectional dimensions of the first channel and the third channel are both larger than the cross-sectional dimensions of the second channel, the cross-sectional dimension of the first channel is smaller than the cross-sectional dimension of the third channel, and the third channel communicates with the receiving cavity; the first channel and the second channel form a first mounting surface, the explosion-proof valve is installed in the first channel, and the explosion-proof valve abuts against the first mounting surface; the second channel and the third channel form a second mounting surface, the support member is installed in the third channel, and the support member abuts against the second mounting surface.

[0014] According to a housing assembly provided by the present invention, along the direction from the bottom surface of the housing body to the receiving cavity, the distance between the side of the isolation plate near the receiving cavity and the inner wall surface of the receiving cavity is H2, and the distance between the side of the isolation plate near the explosion-proof valve and the explosion-proof valve is H3, where 0.45mm≤H2+H3≤0.8mm and 0.35mm≤H3≤1mm.

[0015] According to a housing assembly provided by the present invention, the area of ​​the vent is S1, the area of ​​the support is S2, and the area of ​​the explosion-proof valve is S3, where S1+S2 <S3,0.15mm<S2<0.45mm,0.5≤S1 / S3≤0.8。

[0016] The support member and housing assembly provided by this invention, by providing a support portion on the outer periphery of the bottom surface of the isolation plate, the support portion is used to abut against the housing body. During the process of inserting the electrode assembly into the housing, it isolates the electrode assembly from the explosion-proof valve, preventing the electrode assembly from being squeezed or scraped against the explosion-proof valve, thereby protecting the electrode assembly from damage. By connecting the support portion to the housing body, the distance between the isolation plate and the explosion-proof valve is increased, providing deformation space for the explosion-proof valve and preventing blockage. By providing vent holes on the isolation plate, when the internal pressure is too high, the explosion-proof valve is opened, and the vent holes can release the excess internal pressure, thereby effectively preventing equipment damage or dangerous accidents caused by overpressure, and ensuring high safety. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a structural schematic diagram of the support member provided by the present invention.

[0019] Figure 2 This is a bottom view of the support member provided by the present invention.

[0020] Figure 3 This is a left view of the support member provided by the present invention.

[0021] Figure 4 This is a schematic diagram of the structure of the housing assembly provided by the present invention.

[0022] Figure 5 This is a bottom view of the housing assembly provided by the present invention.

[0023] Figure 6 This invention provides Figure 5 A schematic diagram of the cross section of AA.

[0024] Figure 7 This invention provides Figure 6 A magnified view of a portion of region M.

[0025] Figure 8 This invention provides Figure 7 A magnified view of a portion of region N in the middle.

[0026] Figure 9 This is a cross-sectional schematic diagram of the 5 types of BB provided by the present invention.

[0027] Figure 10 This invention provides Figure 9 A magnified view of a portion of region P.

[0028] Figure 11 This is a schematic diagram of the battery structure provided by the present invention.

[0029] Figure 12 This is an exploded view of the battery provided by the present invention.

[0030] Figure 13 This is a bottom view of the battery provided by the present invention.

[0031] Figure 14 This invention provides Figure 13 A cross-sectional schematic diagram of CC.

[0032] Figure 15 This invention provides Figure 14 A magnified view of the Q region.

[0033] Figure label: 10. Support component; 11. Isolation plate; 111. Vent hole; 12. Support part; 121. First support part; 122. Second support part; 20. Housing assembly; 21. Housing body; 211. Receiving cavity; 212. Opening; 213. Mounting port; 22. Protrusion; 221. First channel; 222. Second channel; 223. Third channel; 224. First mounting surface; 225. Second mounting surface; 30. Insulation layer; 40. Electrode group; 50. Explosion-proof valve; 60. End plate assembly; 61. End plate; 62. Cover plate. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0035] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0036] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0039] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0040] In the battery manufacturing process, the insertion of the electrode assembly into the casing is a critical step. The explosion-proof valve is located at the bottom of the casing body, and during the insertion process, it is prone to being squeezed, resulting in problems such as scraping and blockage. Squeezing and scraping between the electrode assembly and the explosion-proof valve may damage the insulation layer on the electrode assembly surface, increasing the risk of internal short circuits. Once an internal short circuit occurs, the battery will generate a large amount of heat, potentially causing thermal runaway and affecting battery safety. Furthermore, blockage of the explosion-proof valve will prevent it from functioning properly, causing it to fail to open and release pressure in a timely manner, resulting in low safety. Therefore, this invention provides a support member and casing assembly to protect the explosion-proof valve and the electrode assembly, preventing squeezing and blockage between them.

[0041] The following is combined Figures 1-15 The support member 10 and the housing assembly 20 of the present invention are described.

[0042] The support member 10 provided in this embodiment of the invention is disposed at the bottom of the shell body 21 to isolate the explosion-proof valve 50 from the electrode assembly 40. The support member 10 includes: an isolation plate 11, a support portion 12 is provided on the outer periphery of the bottom surface of the isolation plate 11, the support portion 12 is used to abut against the shell body 21, and a vent hole 111 is provided on the isolation plate 11 to connect the electrode assembly 40 and the explosion-proof valve 50.

[0043] like Figure 4 As shown, the shell body 21 has a rectangular structure and a receiving cavity 211. Openings 212 are provided at both ends of the receiving cavity 211 along its length, allowing the pole assembly 40 to be placed into the receiving cavity 211 through one of the openings 212. Figure 5 As shown, the bottom surface of the housing body 21 is provided with an installation port 213, through which the explosion-proof valve 50 is installed and can be opened. The support member 10 is located within the receiving cavity 211, on the bottom surface of the receiving cavity 211, preventing the electrode assembly 40 from scraping against the explosion-proof valve 50 during insertion into the housing. A gap exists between the support member 10 and the explosion-proof valve 50 on the side closest to the valve, providing deformation space for the valve and preventing blockage. A gap also exists between the support member 10 and the electrode assembly 40 on the side closest to the electrode assembly 40, preventing scraping between the electrode assembly 40 and the support member 10 and protecting the insulation layer 30 on the outer wall of the electrode assembly 40. In some embodiments of the present invention, adjacent walls of the housing body 21 are connected by rounded corners or chamfers. Correspondingly, rounded corners or chamfers are provided at corresponding positions on the electrode assembly 40, which facilitates insertion of the electrode assembly 40 into the housing and reduces the risk of scraping.

[0044] like Figure 1 and Figure 2As shown, a support portion 12 is provided on the outer periphery of the bottom surface of the isolation plate 11. The support portion 12 is used to abut against the shell body 21. The support portion 12 can be glued to the shell body 21, thereby positioning the isolation plate 11 on the side of the explosion-proof valve 50 near the receiving cavity 211. This prevents the electrode assembly 40 from being squeezed or scraped against the explosion-proof valve 50 during the process of entering the shell, protecting the insulation layer 30 on the outer wall of the electrode assembly 40. The present invention connects the support portion 12 to the shell body 21, thereby increasing the distance between the isolation plate 11 and the explosion-proof valve 50, providing deformation space for the explosion-proof valve 50, and facilitating its opening. Furthermore, the isolation plate 11 is provided with a vent hole 111. When the pressure of the battery cell in the receiving cavity 211 is too high, the explosion-proof valve 50 is opened, and the pressure can be released through the vent hole 111 on the isolation plate 11 and the explosion-proof valve 50.

[0045] The support member 10 provided in this embodiment of the invention has a support portion 12 provided on the outer periphery of the bottom surface of the isolation plate 11. The support portion 12 is used to abut against the shell body 21. During the process of the electrode assembly 40 entering the shell, it isolates the electrode assembly 40 from the explosion-proof valve 50, preventing the electrode assembly 40 from being squeezed or scraped by the explosion-proof valve 50, thereby protecting the electrode assembly 40 from damage. The connection between the support portion 12 and the shell body 21 increases the distance between the isolation plate 11 and the explosion-proof valve 50, providing deformation space for the explosion-proof valve 50 and preventing the explosion-proof valve 50 from being blocked. By providing a vent hole 111 on the isolation plate 11, when the internal pressure is too high, the explosion-proof valve 50 is opened, and the vent hole 111 can release the excess internal pressure, thereby effectively preventing equipment damage or dangerous accidents caused by overpressure, and ensuring high safety.

[0046] Compared with the prior art, the embodiments of the present invention eliminate the side plate structure, reduce the number of parts, reduce the difficulty of the process, and also reduce defects caused by side plate hot melting and assembly.

[0047] In some embodiments of the present invention, such as Figure 1 and Figure 2 As shown, the support portion 12 includes two first support portions 121 and two second support portions 122. The two first support portions 121 are respectively disposed on both sides of the partition plate 11 in the width direction, and the two second support portions 122 are respectively disposed on both sides of the partition plate 11 in the length direction. The two first support portions 121 and the two second support portions 122 have the same thickness and are all used to connect with the shell body 21.

[0048] In one embodiment, the second support portion 122 is spaced from the two first support portions 121 at both ends of the isolation plate 11 in the width direction, which reduces the contact area between the support portion 12 and the shell body 21. The area of ​​the isolation plate 11 with the explosion-proof valve 50 is increased, which prevents the explosion-proof valve 50 from being blocked and helps to release internal pressure.

[0049] In some embodiments of the present invention, the isolation plate 11 includes a first isolation portion, a second isolation portion, and a third isolation portion, wherein the first isolation portion and the third isolation portion are disposed on both sides of the second isolation portion along its length. For example... Figure 1 and Figure 2 As shown, the first and third isolation portions are both semi-circular plates, while the second isolation portion is a rectangular plate with the same width as the diameter of the semi-circular plate. Two first support portions 121 are respectively disposed on both sides of the second isolation portion in the width direction, extending along the length direction of the first isolation portion, with the first support portions 121 extending to the outer edge of the second support portions 122. Two second support portions 122 are respectively disposed in the first and third isolation portions, with a gap between each second support portion 122 and each of the two first support portions 121 to facilitate pressure release. In one embodiment, one second support portion 122 is located in the middle of the first isolation portion in the width direction of the second isolation portion; similarly, the other second support portion 122 is located in the middle of the third isolation portion in the width direction of the second isolation portion. That is, in the width direction of the isolation plate 11, the centerlines of both second support portions 122 are collinear with the centerline of the second isolation portion, thereby enhancing the connection stability between the support portion 12 and the shell body 21.

[0050] In some embodiments of the present invention, such as Figure 3 As shown, the thickness of the support portion 12 is H1. It should be noted that the thickness direction of the support portion 12 is consistent with the thickness direction of the isolation plate 11, 0.15mm ≤ H1 ≤ 1.5mm. That is, the distance between the isolation plate 11 and the explosion-proof valve 50 is 0.15mm ≤ H1 ≤ 1.5mm, providing deformation space for the explosion-proof valve 50, facilitating opening, and preventing blockage. In one embodiment, the thickness H1 of the support portion 12 can be 0.15mm, 0.3mm, 0.5mm, 0.8mm, 1mm, 1.4mm, 1.5mm, etc. In this embodiment of the invention, the thickness H1 of the support portion 12 can be set according to the model of the explosion-proof valve 50.

[0051] In some embodiments of the present invention, the sum of the thicknesses of the support portion 12 and the partition plate 11 is T, where 0.65mm ≤ T ≤ 3.5mm, that is, the thickness h of the partition plate 11 is 0.5mm ≤ h ≤ 2mm, ensuring the strength of the support member 10. In one embodiment, the thickness h of the partition plate 11 can be 0.5mm, 0.8mm, 1mm, 1.3mm, 1.5mm, 1.8mm, 2mm, etc. In another embodiment, the sum of the thicknesses T of the support portion 12 and the partition plate 11 is 0.65mm, 0.8mm, 1mm, 1.25mm, 1.5mm, 1.8mm, 2mm, 2.3mm, 2.5mm, 2.8mm, 3mm, 3.2mm, 3.5mm, etc.

[0052] In some embodiments of the present invention, in order to better release pressure when the pressure inside the shell body 21 is too high, multiple vent holes 111 can be provided on the isolation plate 11, such as 3, 5, 8, 10, etc. The size of the vent holes 111 is not specifically limited and can be set according to actual needs.

[0053] In one embodiment, a plurality of vent holes 111 are spaced apart along the length of the partition plate 11 and are located within the space enclosed by the support portion 12.

[0054] In another embodiment, a plurality of vent holes 111 are spaced apart along the width direction of the partition plate 11 and are located within the space enclosed by the support portion 12.

[0055] In another embodiment, a plurality of vent holes 111 are spaced apart along the length of the partition plate 11, and 20 vent holes 111 are spaced apart along the length of the partition plate 11, such as... Figure 3 As shown, multiple vent holes 111 form a vent group. Furthermore, the vent group is spaced apart along the width direction of the partition plate 11, such as... Figure 1 and Figure 2 As shown, the ventilation holes are arranged in three rows at intervals along the width of the isolation plate 11.

[0056] like Figure 4 and Figure 5 As shown, this embodiment of the invention also provides a housing assembly 20, including the support member 10 as in any of the above embodiments.

[0057] In some embodiments of the present invention, the housing assembly 20 further includes a housing body 21 and an explosion-proof valve 50. The housing body 21 has a receiving cavity 211, with openings 212 at both ends along its length, for receiving the electrode assembly 40; the bottom surface of the housing body 21 has a mounting port 213, and the explosion-proof valve 50 is disposed in the mounting port 213; the support member 10 is disposed within the receiving cavity 211, located between the electrode assembly 40 and the explosion-proof valve 50.

[0058] like Figure 4 As shown, the shell body 21 has a rectangular structure and a receiving cavity 211. Openings 212 are provided at both ends of the receiving cavity 211 along its length, allowing the pole assembly 40 to be placed into the receiving cavity 211 through one of the openings 212. Figure 4 and Figure 6 As shown, the bottom surface of the shell body 21 is provided with a mounting port 213, and the explosion-proof valve 50 is installed in the mounting port 213 and can be opened through the mounting port 213. Figure 7 , Figure 8 and Figure 9As shown, the support member 10 is disposed within the mounting port 213. When the support member 10 is located on the side of the explosion-proof valve 50 near the receiving cavity 211, it prevents the electrode assembly 40 from rubbing against the explosion-proof valve 50 during insertion into the housing. A gap exists between the support member 10 and the explosion-proof valve 50 on the side near the valve 50, providing deformation space for the explosion-proof valve 50 and preventing blockage. Similarly, a gap exists between the support member 10 and the electrode assembly 40 on the side near the electrode assembly 40, preventing the electrode assembly 40 from rubbing against the support member 10.

[0059] In some embodiments of the present invention, such as Figure 7 , Figure 8 , Figure 9 and Figure 10 As shown, the bottom surface of the shell body 21 is provided with a protrusion 22, and the protrusion 22 is provided with a first channel 221, a second channel 222, and a third channel 223 that are interconnected. The first channel 221, the second channel 222, and the third channel 223 are coaxially arranged, with the first channel 221 and the third channel 223 located on opposite sides of the second channel 222. The cross-sectional dimensions of both the first channel 221 and the third channel 223 are larger than the cross-sectional dimension of the second channel 222, while the cross-sectional dimension of the first channel 221 is smaller than the cross-sectional dimension of the third channel 223. The third channel 223 is connected to the receiving cavity 211. In this embodiment of the invention, the cross-sectional shapes of the first channel 221, the second channel 222, and the third channel 223 are not specifically limited, such as... Figure 4 and Figure 5 As shown, the cross-sections of the first channel 221, the second channel 222, and the third channel 223 are all oblong holes, which match the explosion-proof valve 50.

[0060] like Figure 8 As shown, the first channel 221 and the second channel 222 form a first mounting surface 224. The explosion-proof valve 50 is installed in the first channel 221, and the side of the explosion-proof valve 50 near the receiving cavity 211 abuts against the first mounting surface 224. The second channel 222 and the third channel 223 form a second mounting surface 225. The support member 10 is installed in the third channel 223, and the side of the support member 12 away from the receiving cavity 211 abuts against the second mounting surface 225. The support member 10 isolates the explosion-proof valve 50 from the electrode group 40 to prevent the electrode group 40 from being squeezed or scratched by the explosion-proof valve 50, thus protecting the electrode group 40.

[0061] like Figure 14 and Figure 15As shown, the distance H3 between the side of the explosion-proof valve 50 close to the support member 10 and the isolation plate 11 is greater than the extension length of the second channel 222, providing a deformation space for the explosion-proof valve 50, preventing the explosion-proof valve 50 from being blocked, and helping to release pressure. There is a distance H2 between the side of the isolation plate 11 close to the accommodation cavity 211 and the inner wall surface of the accommodation cavity 211, which helps the electrode group 40 to be inserted into the housing and can also prevent the electrode group 40 from being squeezed or rubbed against the support member 10 during the process of inserting into the housing, damaging the electrode group 40.

[0062] In some embodiments of the present invention, the cross-sectional dimension of the third channel 223 is greater than the length of the support member 10, that is, the center line of the support member 10 is collinear with the axis of the third channel 223, and there are distances between the two ends of the support member 10 in the length direction and the inner wall surface of the third channel 223 respectively, which helps to install the support member 10 in the third channel 223.

[0063] In some embodiments of the present invention, the distance between the side of the isolation plate 11 close to the accommodation cavity 211 and the inner wall surface of the accommodation cavity 211 is H2. During the process of the electrode group 40 being inserted into the housing, it prevents the electrode group 40 from being squeezed or rubbed against the isolation plate 11, protects the electrode group 40, and prevents the insulation layer 30 on the outer wall surface of the electrode group 40 from being damaged. The distance between the side of the isolation plate 11 far from the accommodation cavity 211 and the explosion-proof valve 50 is H3, providing a deformation space for the explosion-proof valve 50, facilitating opening, and preventing the explosion-proof valve 50 from being blocked. Among them, 0.45mm ≤ H2 + H3 ≤ 0.8mm, 0.35mm ≤ H3 ≤ 1mm, which helps with stamping, weight reduction, ensuring a safety protection distance, and at the same time improving space utilization. In one embodiment, H2 + H3 can be 0.45mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, etc. In one embodiment, the distance H3 between the isolation plate 11 and the explosion-proof valve 50 can be 0.35mm, 0.4mm, 0.5m, 0.55mm, 0.6mm, 0.68mm, 0.7mm, 0.72mm, 0.8mm, 0.86mm, 0.9mm, 0.95mm, 1mm.

[0064] In some embodiments of the present invention, the area of the vent hole 111 on the isolation plate 11 is S1, the area of the support portion 12 is S2, and the area of the explosion-proof valve 50 is S3, S1 + S2 < S3, 0.5 ≤ S1 / S3 ≤ 0.8, which can meet the strength and safety requirements. In some embodiments, S1 / S3 can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, etc.

[0065] In some embodiments of the present invention, the area of the support portion 12 is S2, 0.15mm < S2 < 0.45mm. In one embodiment, the area S2 of the support portion 12 can be 0.15mm, 0.2mm, 0.35mm, 0.4mm, 0.45mm, etc.

[0066] In this embodiment of the invention, the support member 10 can be a high-temperature resistant support plate, which can be made of PPS (polyphenylene sulfide).

[0067] Based on the above embodiments, the present invention conducted corresponding experiments, as shown in Table 1, which shows the test results of the electrode assembly 40 when it is installed in the shell under different parameters. The thickness of the insulating layer 30 on the electrode assembly 40 is 0.1 mm, and the material is PP (polypropylene).

[0068] Table 1. Test structures of the electrode assembly under different parameters. like Figure 11 , Figure 12 and Figure 13 As shown, this embodiment of the invention also provides a battery, including the housing assembly 20 of any of the above embodiments. The battery further includes an electrode group 40 and an end plate assembly 60, with the electrode group 40 disposed within a receiving cavity 211. Openings 212 at both ends of the receiving cavity 211 cover the end plate assembly 60. In one embodiment, an elastic member is provided at the opening 212, and the outer wall surface of the end plate assembly 60 abuts against the elastic member.

[0069] Specifically, the electrode assembly 40 is inserted into the receiving cavity 211 through the opening 212, and the end of the electrode assembly 40 near the opening contacts the elastic element; the bottom surface of the receiving cavity 211 is provided with an exhaust groove, and a reinforcing part is formed between two adjacent exhaust grooves. The bottom surface of the electrode assembly 40 abuts against the reinforcing part to provide support and prevent the electrode assembly from sinking. Figure 12 As shown, the end plate assembly 60 includes an end plate 61 and a cover plate 62. The end plate 61 is inserted into the opening 212. The outer wall surface of the end plate 61 abuts against the elastic element, providing a good fixing effect and also achieving a sealing effect. Furthermore, the cover plate 62 covers the end plate 61 to fix and seal the end plate 61, achieving a double seal.

[0070] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A support member, characterized in that, The support member is located at the bottom of the shell body to isolate the explosion-proof valve from the electrode assembly; the support member includes: an isolation plate, the bottom outer periphery of which is provided with a support portion for abutting against the shell body, and the isolation plate is provided with a vent hole to connect the electrode assembly and the explosion-proof valve.

2. The support member according to claim 1, characterized in that, The support portion includes two first support portions and two second support portions. The two first support portions are located on both sides of the width direction of the isolation plate, and the two second support portions are located on both sides of the length direction of the isolation plate.

3. The support member according to claim 2, characterized in that, There is a gap between the second support portion and the two first support portions.

4. The support member according to claim 2, characterized in that, The isolation plate includes a first isolation section, a second isolation section, and a third isolation section. The first isolation section and the third isolation section are located on both sides of the length direction of the second isolation section. The first isolation section and the third isolation section are semi-circular plates, and the second isolation section is a rectangular plate. In the width direction of the isolation plate, the center lines of the two second support sections are collinear with the center line of the second isolation section.

5. The support member according to claim 1, characterized in that, The thickness of the support part is H1, 0.15mm≤H1≤1.5mm; the sum of the thicknesses of the support part and the isolation plate is T, 0.65mm≤T≤3.5mm.

6. The support member according to claim 1, characterized in that, The ventilation holes are multiple, and the multiple ventilation holes are spaced apart along the length direction of the partition plate; and / or, the multiple ventilation holes are spaced apart along the width direction of the partition plate.

7. A housing assembly, characterized in that, The device includes the support member as described in any one of claims 1 to 6, and further includes a shell body and an explosion-proof valve. The shell body has a receiving cavity with openings at both ends along its length. The receiving cavity is used to receive the electrode assembly. The bottom surface of the shell body has an installation port, and the explosion-proof valve is located at the installation port. The support member is located inside the receiving cavity, between the electrode assembly and the explosion-proof valve.

8. The housing assembly according to claim 7, characterized in that, The bottom surface of the shell body is provided with a protrusion, and the protrusion is provided with a first channel, a second channel and a third channel that are interconnected. The first channel, the second channel and the third channel are coaxially arranged, and the first channel and the third channel are respectively located on both sides of the second channel. The cross-sectional dimensions of the first channel and the third channel are both larger than the cross-sectional dimensions of the second channel, and the cross-sectional dimensions of the first channel are smaller than the cross-sectional dimensions of the third channel. The third channel is connected to the receiving cavity. The first channel and the second channel form a first mounting surface, and the explosion-proof valve is installed in the first channel, abutting against the first mounting surface; the second channel and the third channel form a second mounting surface, and the support member is installed in the third channel, abutting against the second mounting surface.

9. The housing assembly according to claim 8, characterized in that, Along the direction from the bottom surface of the shell body to the receiving cavity, the distance between the side of the isolation plate near the receiving cavity and the inner wall surface of the receiving cavity is H2, and the distance between the side of the isolation plate near the explosion-proof valve and the explosion-proof valve is H3, 0.45mm≤H2+H3≤0.8mm, 0.35mm≤H3≤1mm.

10. The housing assembly according to claim 8, characterized in that, The area of ​​the vent is S1, the area of ​​the support is S2, and the area of ​​the explosion-proof valve is S3, where S1 + S2 <S3,0.15mm<S2<0.45mm,0.5≤S1 / S3≤0.8。

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