Cover plate assembly, battery cell, battery and vehicle

Abstract

The utility model provides a cover plate assembly, a battery cell, a battery and a vehicle. The cover plate assembly comprises a top cover piece, a space ring piece and a supporting piece. The top cover piece is provided with a first through hole penetrating in the first pressure relief direction, and the first through hole is configured to be matched with the anti-explosion valve to achieve pressure relief; the space ring piece and the top cover piece are arranged in a stacked mode in the first pressure relief direction. The supporting piece is arranged between the top cover piece and the space ring piece in the first pressure relief direction and makes contact with the top cover piece and the space ring piece. The supporting piece comprises a side wall extending in the first pressure relief direction, the side wall is provided with a pressure relief opening formed in a penetrating mode, the first through hole and the pressure relief opening are constructed to communicate with the external environment, and the penetrating direction of the pressure relief opening intersects with the first pressure relief direction. The battery cell comprises a shell, a pole core and the cover plate assembly. The battery comprises a plurality of battery cells. The vehicle comprises a main body part and the battery cell or the battery, and the main body part is electrically connected with the battery cell or the battery.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automobile parts, in particular to a cover plate assembly, an electric core, a battery and a vehicle. BACKGROUND

[0002] In order to improve the safety of chemical energy storage devices, an explosion-proof valve is usually arranged in the electric core to avoid shell explosion or explosion when the electric core is in thermal runaway. However, the internal working condition of the electric core is complex when it is in thermal runaway, and sometimes the pole core moves or the molten plastic part blocks the explosion-proof valve, resulting in that the gas generated in the electric core and the active material cannot be discharged, and further causing shell explosion or explosion. How to solve the above problems and improve the safety of chemical energy storage devices is a problem that needs to be considered by those skilled in the art. CONTENT OF THE UTILITY MODEL

[0003] In order to solve the problems in the prior art, the embodiments of the present application provide a cover plate assembly, an electric core, a battery and a vehicle with better safety performance.

[0004] The embodiments of the present application provide a cover plate assembly, which comprises a top cover piece, a spacer piece and a support piece. The top cover piece has a first through hole penetratingly arranged along a first pressure relief direction, and the first through hole is configured to cooperate with an explosion-proof valve to achieve pressure relief; the spacer piece is arranged in a stack along the first pressure relief direction with the top cover piece; and the support piece is arranged between the top cover piece and the spacer piece along the first pressure relief direction and in contact with both of them. Wherein, the support piece comprises a side wall extending along the first pressure relief direction, the side wall has a pressure relief opening penetratingly arranged, and the first through hole and the pressure relief opening are configured to be in communication with the external environment respectively, and the penetrating direction of the pressure relief opening intersects with the first pressure relief direction.

[0005] Further, the top cover member is provided with the first through hole, and the explosion-proof valve is arranged at the first through hole to realize pressure relief. The spacer ring member is arranged in layers with the top cover member, and the support member is arranged between the top cover member and the spacer ring member along the first direction and in contact with both, so that the support member can support and / or limit the spacer ring member, improve the strength of the spacer ring member, make the support of the spacer ring member more stable, and avoid the movement of the pole core in the battery cell due to vibration or thermal runaway, thereby avoiding the blockage of the pressure relief channel of the explosion-proof valve by the pole core, and improving the safety performance. At the same time, the side wall of the support member extends along the first pressure relief direction to avoid blocking the first through hole and to support the spacer ring member and / or the top cover member. The first through hole and the pressure relief port have different penetration directions and can be respectively communicated with the external environment, so that the first through hole and the pressure relief port can be used as different pressure relief channels. Even if the front surface of the cover plate assembly is blocked due to the movement of the pole core or the melting of the plastic, the pressure relief port with different penetration directions and being communicated with the external environment can still be used for exhaust pressure relief, ensuring that the explosion-proof valve is not blocked after being opened, avoiding the occurrence of shell explosion or explosion, and improving the safety performance.

[0006] In an embodiment, the support member is integrally formed with the top cover member or is connected separately therefrom, the side wall surrounds the first through hole, and the end surface of the support member away from the top cover member abuts against the spacer ring member along the first pressure relief direction.

[0007] In an embodiment, the spacer ring member has a second through hole penetratingly arranged along the first pressure relief direction, the support member has a pressure relief space penetratingly arranged along the first pressure relief direction, the side wall surrounds the pressure relief space, and the first through hole, the second through hole, and the pressure relief port are respectively communicated with the pressure relief space.

[0008] In an embodiment, the support member is detachably connected with the spacer ring member, the side wall is configured to surround the second through hole, and the end surface of the support member away from the spacer ring member abuts against the top cover member along the first pressure relief direction.

[0009] In an embodiment, the spacer ring member has a support step for abutting against and limiting the support member, and part of the side wall extends into the second through hole, and at least part of the pressure relief port is located outside the second through hole.

[0010] In an embodiment, the cover plate assembly further comprises a lower plastic member arranged between the top cover member and the spacer ring member along the first pressure relief direction, the lower plastic member has a third through hole penetratingly arranged along the first pressure relief direction, the support member is arranged through the third through hole, and the side wall abuts against the lower plastic member.

[0011] In an embodiment, the plurality of pressure relief openings have different through directions.

[0012] The application further provides an electric core, which comprises a shell, a pole core, and the cover plate assembly according to any one of the preceding embodiments. The shell and the cover plate assembly cooperate to form a containing space, and the pole core is arranged in the containing space. The support member is arranged on the side of the spacer member away from the pole core along the first pressure relief direction.

[0013] Further, the shell and the cover plate assembly cooperate to form a containing space for containing the pole core. When the electric core faces thermal runaway and the pole core is pressed towards the side where the explosion-proof valve is located, the support member can support the spacer member to resist the pole core, or the support member can directly support and limit the pole core, thereby avoiding movement of the pole core and preventing shell explosion or explosion caused by blockage of the explosion-proof valve, and improving the safety performance of the electric core. At the same time, even if the front surface of the cover plate assembly is blocked due to movement of the pole core or melting of plastic, the pressure relief openings can still be used for exhaust and pressure relief, ensuring that the explosion-proof valve is not blocked after being opened, avoiding shell explosion or explosion, and improving the safety performance of the electric core.

[0014] The application further provides a battery comprising a plurality of electric cores according to the preceding embodiments.

[0015] The application further provides a vehicle comprising a main body and an electric core according to the preceding embodiments, or a battery according to the preceding embodiments. The main body is electrically connected to the electric core or the battery.

[0016] Further, the battery and the vehicle apply the electric core according to the preceding embodiments, and the safety performance of each electric core is improved. The battery and the vehicle have better safety performance when facing thermal runaway risk. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 A plan view of the cover plate assembly according to an embodiment of the application is shown.

[0018] Figure 2 A Figure 1 A sectional view along the II-II direction.

[0019] Figure 3 A Figure 1 A sectional view along the III-III direction.

[0020] Figure 4 A partial perspective view of the cover plate assembly according to an embodiment of the application is shown.

[0021] Figure 5 AFigure 4 A perspective exploded schematic view of the support member of the cover plate assembly according to an embodiment of the present application.

[0022] Figure 6 A perspective view of the support member of the cover plate assembly cooperating with the top cover member according to an embodiment of the present application.

[0023] Figure 7 A perspective view of the support member of the cover plate assembly cooperating with the spacer member according to another embodiment of the present application.

[0024] Figure 8 A perspective view of the support member of the cover plate assembly according to another embodiment of the present application.

[0025] Figure 9 A structural schematic view of the battery cell according to an embodiment of the present application.

[0026] Figure 10 A structural schematic view of the battery according to an embodiment of the present application.

[0027] Figure 11 A structural schematic view of the vehicle according to an embodiment of the present application.

[0028] Main element symbol explanation

[0029] Cover plate assembly 10

[0030] Top cover member 11

[0031] First through hole 111

[0032] Spacer member 12

[0033] Support step 121

[0034] Second through hole 122

[0035] Pressure relief opening 123

[0036] Support member 13

[0037] Pressure relief port 1301

[0038] Pressure relief space 1302

[0039] Side wall 131

[0040] Sub-wall 1311

[0041] Reinforcing plate 132

[0042] Explosion-proof valve 141

[0043] Explosion-proof valve protection film 142

[0044] Lower plastic member 15

[0045] Third through hole 153

[0046] Upper plastic part 161

[0047] Riveting block 162

[0048] Pole 17

[0049] Plate body part 171

[0050] Cylinder part 172

[0051] Sealing ring 18

[0052] Avoidance hole 19

[0053] Battery cell 2

[0054] Accommodation space 20

[0055] Shell 21

[0056] Pole core 22

[0057] Battery 3

[0058] Vehicle 4

[0059] Main body part 41

[0060] First pressure relief direction Z

[0061] Second extension direction Y

[0062] Third extension direction X

[0063] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0064] The following description will refer to the accompanying drawings, which are meant to be exemplary embodiments of the present application. However, the application can be implemented in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. These exemplary embodiments are provided so that this application will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. Like reference numbers refer to like or similar components throughout the specification. The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, to the extent that the terms "including", "includes", "having", "has", "a", "an", "contains", "containing", or variants thereof are used in either the detailed description or the claims, such terms are intended to be inclusive in a manner similar to the term "comprising" or "comprises" as an aid to comprehension of the intellectual property understood by a person of ordinary skill in the art. Unless defined on

[0065] Generally, in order to improve the safety of the chemical energy storage device, an explosion-proof valve is usually arranged in the battery cell to avoid shell explosion or explosion when the battery cell is in thermal runaway. However, the working condition inside the battery cell is complex when the battery cell is in thermal runaway, and sometimes the pole core moves or the molten plastic part blocks the explosion-proof valve, which causes the gas and active material inside the battery cell to be unable to be discharged, and further causes shell explosion or explosion.

[0066] Correspondingly, the application provides a cover plate assembly, a battery cell, a battery and a vehicle. The cover plate assembly comprises a top cover, a spacer and a support; the top cover has a first through hole penetrating in a first pressure relief direction, and the first through hole is configured to cooperate with the explosion-proof valve to achieve pressure relief; the spacer is stacked with the top cover in the first pressure relief direction; the support is arranged between the top cover and the spacer in the first pressure relief direction and in contact with both of them; the support comprises a side wall extending in the first pressure relief direction, and the side wall has a pressure relief opening penetratingly arranged; the first through hole and the pressure relief opening are configured to communicate with the external environment respectively, and the penetrating direction of the pressure relief opening intersects with the first pressure relief direction. The battery cell comprises a shell, a pole core and the cover plate assembly. The battery comprises a plurality of the battery cells. The vehicle comprises a main body and the battery cell or the battery, and the main body is electrically connected with the battery cell or the battery.

[0067] Further, the top cover member is provided with the first through hole, and the explosion-proof valve is arranged in the first through hole to realize pressure relief. The spacer ring member and the top cover member are arranged in layers, and the support member is arranged between the top cover member and the spacer ring member along the first direction and in contact with both of them, so that the support member can support and / or limit the spacer ring member, improve the strength of the spacer ring member, make the spacer ring member support the pole core more stably, and avoid the pole core from moving in the battery cell due to vibration or thermal runaway, thereby avoiding the pole core from blocking the pressure relief channel of the explosion-proof valve and improving the safety performance. At the same time, the side wall of the support member extends along the first pressure relief direction to avoid blocking the first through hole and can support the spacer ring member and / or the top cover member. The first through hole and the pressure relief port have different penetration directions and can be respectively communicated with the external environment, so that the first through hole and the pressure relief port can be respectively used as different pressure relief channels. Even if the front surface of the cover plate assembly is blocked due to the movement of the pole core or the melting of plastic, the pressure relief port with different penetration directions and being communicated with the external environment can still be used for exhaust pressure relief, ensuring that the explosion-proof valve is not blocked after being opened, avoiding the occurrence of shell explosion or explosion, and improving the safety performance. The shell and the cover plate assembly cooperate to form a containing space for containing the pole core. When the battery cell faces thermal runaway and the pole core is pressed towards the side where the explosion-proof valve is located, the support member can support the spacer ring member to resist the pole core, or the support member can directly support and limit the pole core, thereby avoiding the movement of the pole core and avoiding the occurrence of shell explosion or explosion due to the blockage of the explosion-proof valve, and improving the safety performance of the battery cell. The battery and the vehicle apply the foregoing battery cell, and the safety performance of each battery cell is improved, and the battery and the vehicle applied thereto have better safety performance when facing thermal runaway risk.

[0068] The following description will be made with reference to the accompanying drawings. It should be noted that the components depicted in the accompanying drawings are not necessarily shown to scale; and the same or similar components will be denoted by the same or similar reference numerals or similar technical terms.

[0069] The specific embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0070] As shown in Figures 1 to 3 The embodiments of the present application provide a cover plate assembly 10, which comprises a top cover member 11, a spacer ring member 12 and a support member 13. The spacer ring member 12 and the top cover member 11 are arranged in layers along a first pressure relief direction Z; and the support member 13 is arranged between the top cover member 11 and the spacer ring member 12 along the first pressure relief direction Z and in contact with both of them.

[0071] In an embodiment, the top cover 11 has a first through hole 111 penetrating in the first pressure relief direction Z, the first through hole 111 is configured to cooperate with the explosion-proof valve 141 to achieve pressure relief. The support 13 includes a side wall 131 extending in the first pressure relief direction Z, the side wall 131 has a pressure relief port 1301 penetrating therein, the first through hole 111 and the pressure relief port 1301 are configured to communicate with the external environment respectively, and the penetrating direction of the pressure relief port 1301 intersects the first pressure relief direction Z.

[0072] It should be explained that the cover plate assembly 10 is applied to a battery cell 2. The top cover 11 is arranged at the outer side of the battery cell 2 generally, and the explosion-proof valve 141 is arranged at the first through hole 111 for pressure relief. The spacer 12 is arranged at the inner side of the battery cell 2 compared with the top cover 11, and the spacer 12 is configured to contact the pole core 22 of the battery cell 2 earlier than the top cover 11. The support 13 is arranged at the side of the spacer 12 away from the pole core 22 of the battery cell 2, and is configured to support the spacer 12.

[0073] It should be explained that the first pressure relief direction Z is generally the thickness direction of the cover plate assembly 10. The penetrating direction of the pressure relief port 1301 can include multiple directions, for example, the penetrating direction of the pressure relief port 1301 can be all directions on a plane perpendicular to the first pressure relief direction Z, or the penetrating direction of the pressure relief port 1301 can also be other directions not perpendicular to the first pressure relief direction Z. Therefore, the contents (gas and / or other substances) generated when the battery cell 2 is in thermal runaway can be guided out of the cover plate assembly 10 from at least two different directions through the pressure relief port 1301 and the first through hole 111, reducing the probability of the cover plate assembly 10 being completely blocked.

[0074] Further, the top cover 11 is provided with a first through hole 111, and the explosion-proof valve 141 is arranged in the first through hole 111 to realize pressure relief. The spacer 12 is arranged in layers with the top cover 11, and the support 13 is arranged between the top cover 11 and the spacer 12 along the first direction and in contact with both, so that the support 13 can support and / or limit the spacer 12, improve the strength of the spacer 12, make the spacer 12 more stable when supporting the core 22, and avoid the core 22 from moving inside the battery cell 2 due to vibration or thermal runaway, thereby avoiding the core 22 from blocking the pressure relief channel of the explosion-proof valve 141 and improving safety performance. At the same time, the side wall 131 of the support 13 extends along the first pressure relief direction Z, avoids blocking the first through hole 111, and can support the spacer 12 and / or the top cover 11; the first through hole 111 and the pressure relief port 1301 have different penetration directions and can be respectively communicated with the external environment, so that the first through hole 111 and the pressure relief port 1301 can be respectively used as different pressure relief channels. Even if the front surface of the cover plate assembly 10 is blocked due to the movement of the core 22 or the melting of plastic, the pressure relief port 1301 with different penetration directions and being communicated with the external environment can still be used for exhaust pressure relief, ensures that the explosion-proof valve 141 is not blocked after being opened, avoids causing shell explosion or explosion, and improves safety performance.

[0075] In an embodiment, the spacer 12 can be made of a material with insulation properties and / or deformable ability, such as plastic. Compared with the spacer 12, the support 13 and the top cover 11 can be made of a metal material with a higher melting point and greater mechanical strength, such as aluminum and its oxides, or stainless steel with a known mark.

[0076] It can be understood that when the cover plate assembly 10 faces a thermal runaway working condition, the cover plate assembly 10 will face a higher temperature and greater pressure. In such a high-temperature and high-pressure environment, the spacer 12 may be melted and pressed to block the pressure relief channel, and the explosion-proof valve 141 cannot normally relieve pressure. However, the support 13 and the top cover 11 with a higher melting point and greater mechanical strength generally do not melt and deform, maintain their own shape stable and the pressure relief port 1301 unbroken, so that they can continue to support the spacer 12 and / or the core 22, maintain the shape of the pressure relief channel to ensure its pressure relief effect, avoid causing shell explosion or explosion, and improve safety performance.

[0077] Further combining Figures 2 to 4 As shown, in an embodiment, the spacer 12 has a second through hole 122 penetratingly arranged along the first pressure relief direction Z. The support 13 has a pressure relief space 1302 penetratingly arranged along the first pressure relief direction Z, and the side wall 131 surrounds the pressure relief space 1302. The first through hole 111, the second through hole 122, and the pressure relief port 1301 are respectively communicated with the pressure relief space 1302.

[0078] It can be understood that the support member 13 can be a hollow structure, and the middle region is hollow to facilitate the passage of the content. The middle region is the pressure relief space 1302.

[0079] In an embodiment, the projection of the first through hole 111 along the first pressure relief direction Z, the projection of the pressure relief space 1302 along the first pressure relief direction Z, and the projection of the second through hole 122 along the first pressure relief direction Z partially overlap or completely overlap; so that the first through hole 111, the second through hole 122, and the pressure relief port 1301 are respectively in communication with the pressure relief space 1302, for enabling the content to be introduced into the pressure relief space 1302 through the second through hole 122, and further introduced out through the first through hole 111 and the pressure relief port 1301.

[0080] It needs to be explained that although the first through hole 111, the second through hole 122, and the pressure relief space 1302 are non-solid structures, they are defined by corresponding solid structures to have certain spatial shapes. The aforementioned projections refer to the figures having corresponding positions after the spatial shapes are projected onto a two-dimensional plane along the first pressure relief direction Z.

[0081] In an embodiment, the spacer member 12 has a support step 121 for abutting and limiting the support member 13. Part of the side wall 131 is accommodated in the second through hole 122, and the pressure relief port 1301 is located outside the second through hole 122.

[0082] In the present embodiment, the support step 121 is recessed on the spacer member 12 towards the top cover member 11 along the first pressure relief direction Z. The end of the support member 13 away from the top cover member 11 extends into the second through hole 122 and abuts against the support step 121, so that the support member 13 can support the spacer member 12. And / or, the support member 13 is located between the spacer members 12 along the second extension direction Y, and is limited in the second extension direction Y. The second extension direction Y substantially corresponds to the length direction of the cover plate assembly 10, and the second extension direction Y intersects the first pressure relief direction Z.

[0083] It can be understood that the thinned portion of the spacer member 12 forming the support step 121 is arranged on the outer side of the support member 13, that is, the support member 13 and the spacer member 12 are limited to each other on the circumference surrounding the first pressure relief direction Z, which improves the installation strength of the spacer member 12 and the support member 13, makes the support of the support member 13 to the spacer member 12 more stable, and at the same time avoids the spacer member 12 from being dislocated and blocking the explosion-proof valve 141 after softening under the thermal runaway working condition, avoids causing shell explosion or explosion, and improves the safety performance.

[0084] Further combining Figure 5As shown, in an embodiment, the cover plate assembly 10 further comprises a lower plastic member 15, an explosion valve protection film 142, an upper plastic member 161, a riveting block 162, a pole 17 and a sealing ring 18. The lower plastic member 15 is arranged between the top cover member 11 and the spacer member 12 along the first pressure relief direction Z, the top cover member 11 and the lower plastic member 15 are substantially plate-shaped, the spacer member 12 is substantially long strip-shaped with a certain thickness and width, and the top cover member 11, the lower plastic member 15 and the spacer member 12 are arranged in a stack along the first pressure relief direction Z.

[0085] In an embodiment, the lower plastic member 15 has a third through hole 153 arranged through along the first pressure relief direction Z, and the support member 13 is arranged through the third through hole 153, and the side wall 131 abuts against the lower plastic member 15.

[0086] In the present embodiment, the first through hole 111 and the third through hole 153 are arranged at substantially the same position along the first pressure relief direction Z, and the first through hole 111 and the third through hole 153 are communicated along the first pressure relief direction Z. The support member 13 connected to the top cover member 11 can pass through the third through hole 153 along the first pressure relief direction Z, and the outer side of the side wall 131 is configured to abut against the inner wall of the third through hole 153 for supporting the lower plastic member 15.

[0087] It can be understood that the support member 13 can be a reinforcing rib structure for supporting the lower plastic member 15, which can improve the installation strength of the lower plastic member 15, and on the other hand, can ensure that the spacer member 12 is not deformed when the Mylar film is hot-melted, thereby improving the hot-melt yield of the Mylar film.

[0088] Further combining Figure 5 As shown, in an embodiment, the explosion valve 141 is arranged at the first through hole 111, and the explosion valve protection film 142 is arranged on the side of the top cover member 11 away from the lower plastic member 15 along the first pressure relief direction Z, and the explosion valve protection film 142 covers the first through hole 111. The upper plastic member 161, the riveting block 162, the pole 17 are staggered with the first through hole 111 and the third through hole 153, so as to avoid blocking the first through hole 111 and the third through hole 153. The explosion valve 141 can be selected from known and feasible types or structures, for example, a circular valve body, which is not described herein.

[0089] In the embodiment, the upper plastic part 161 is arranged on the side of the top cover part 11 away from the lower plastic part 15 along the first pressure relief direction Z, and the riveting block 162 is arranged on the side of the upper plastic part 161 away from the top cover part 11 along the first pressure relief direction Z. The plate body part 171 of the pole 17 is arranged on the side of the lower plastic part 15 away from the top cover part 11 along the first pressure relief direction Z, and the plate body part 171 of the pole 17 is arranged between the lower plastic part 15 and the spacer part 12 along the first pressure relief direction Z. The column body part 172 of the pole 17 penetrates the lower plastic part 15, the top cover part 11, the upper plastic part 161 and the riveting block 162 along the first pressure relief direction Z, and the top end of the column body part 172 is exposed for subsequent electrical connection. The sealing ring 18 is arranged outside the column body part 172 of the pole 17, and is used to seal the gap between the column body part 172 of the pole 17 and the lower plastic part 15, the top cover part 11 and the upper plastic part 161.

[0090] In the embodiment, the cover plate assembly 10 is provided with an avoiding hole 19 penetrating the lower plastic part 15, the top cover part 11, the upper plastic part 161 and the riveting block 162 along the first pressure relief direction Z, and the column body part 172 of the pole 17 penetrates the avoiding hole 19. The avoiding hole 19 is staggered with the first through hole 111 and the third through hole 153, and is used to guide and limit the position of the pole 17 to avoid the pole 17 from blocking the first through hole 111 and the third through hole 153.

[0091] In the embodiment, the number of the first through hole 111 and the third through hole 153 is one, and the number of the pole 17 is two.

[0092] In other embodiments, the number of the first through hole 111 and the third through hole 153 can also be multiple, which are arranged through respectively, and the number of the pole 17 can be one or other numbers. The pole 17, the upper plastic part 161 and the riveting block 162 are arranged staggered with the first through hole 111 and the third through hole 153 along the first pressure relief direction Z, and details are not described herein.

[0093] Further combining Figure 6 As shown, an embodiment of the support part 13 of the application is shown. In an embodiment, the support part 13 is integrally formed with the top cover part 11 or connected separately. The side wall 131 surrounds the first through hole 111 and abuts against the spacer part 12 along the first pressure relief direction Z away from the end surface of the top cover part 11.

[0094] It can be understood that the support part 13 is connected with the top cover part 11 to obtain support, the side wall 131 surrounds the first through hole 111 and abuts against the spacer part 12, which can avoid blocking the first through hole 111 and provide necessary support for the spacer part 12.

[0095] In the embodiment, the support member 13 is integrally formed with the top cover member 11. The support member 13 can be punched and formed from the top cover member 11, or integrally cast and formed with the top cover member 11, or integrally made from the same material with the top cover member 11 by subtractive process (CNC machining). Thus, the support member 13 and the top cover member 11 have better connection strength, and also have the advantages of saving materials and reducing costs.

[0096] In other embodiments, the support member 13 is connected with the top cover member 11 in a separate manner. It can be understood that the support member 13 and the top cover member 11 can be respectively formed, and then connected by a certain connection process. For example, the support member 13 can be welded to the top cover member 11, or the support member 13 can be clamped to the top cover member 11 by other feasible connection structures, which will not be described here.

[0097] In the embodiment, the height of the support member 13 protruding from the top cover member 11 can be 0.5 to 6 mm, and can also be 1 mm, 2 mm, 3 mm, 4 mm, or 5 mm. In other embodiments, the height of the protrusion can also be other values selected according to actual conditions, which will not be described here.

[0098] In an embodiment, the number of pressure relief openings 1301 is multiple, and the penetrating directions of the multiple pressure relief openings 1301 are not completely the same.

[0099] In an embodiment, the side wall 131 is provided with multiple spaced pressure relief openings 1301 at the end portion away from the top cover member 11 along the first pressure relief direction Z, and the pressure relief openings 1301 are arranged between the top cover member 11 and the spacer member 12. The penetrating directions of the multiple pressure relief openings 1301 are not completely the same but are all located on a plane perpendicular to the first pressure relief direction Z, that is, the multiple pressure relief openings 1301 are arranged around the pressure relief space 1302. The sizes of the multiple pressure relief openings 1301 are also not completely the same. On the premise of ensuring the support strength of the support member 13, the pressure relief openings 1301 with the largest total area can be provided, that is, the support strength of the support member 13 is ensured and the support member 13 has better pressure relief effect.

[0100] In the embodiment, the support 13 is substantially in the shape of an ellipse, and the side wall 131 comprises two sub-walls 1311 spaced apart along a third extension direction X substantially corresponding to the width direction of the cover plate assembly 10, and intersecting with the second extension direction Y and the first pressure relief direction Z. The first through hole 111 is substantially in the shape of an ellipse, and the two sub-walls 1311 are arranged corresponding to the two long sides of the elliptical first through hole 111, and a plurality of relatively small pressure relief openings 1301 are respectively arranged on the two sub-walls 1311, and a relatively large pressure relief opening 1301 is arranged on the region of the side wall 131 corresponding to the two short side ends of the elliptical first through hole 111. The pressure relief opening 1301 can be in an open structure toward the side of the spacer ring 12, facilitating processing. In other embodiments, the specific shape of the side wall 131 and the shape, number, etc. of the pressure relief opening 1301 can also have other forms, which are not described here.

[0101] Further combining Figure 7 and Figure 8 It is shown that another embodiment of the support 13 of the present application is shown. In an embodiment, the support 13 is detachably connected with the spacer ring 12, the side wall 131 is configured to surround the second through hole 122, and the end of the support 13 away from the spacer ring 12 abuts against the top cover 11 along the first pressure relief direction Z.

[0102] In the embodiment, the support 13 and the spacer ring 12 are two separate parts, the shape of the support 13 matches the second through hole 122, and the outer peripheral dimension of the support 13 is slightly smaller than the inner peripheral dimension of the spacer ring 12, and the support 13 is nested in the second through hole 122 and detachably connected with the spacer ring 12.

[0103] In the embodiment, the side wall 131 of the support 13 matches the shape of the second through hole 122, and the support 13 further comprises a reinforcing plate 132 transversely arranged in the second through hole 122 and connected with the side wall 131 to improve the strength of the support 13.

[0104] In an embodiment, the number of pressure relief openings 1301 is multiple, and the penetrating directions of the multiple pressure relief openings 1301 are not completely the same.

[0105] In an embodiment, the end of the side wall 131 away from the spacer ring 12 is provided with multiple spaced-apart pressure relief openings 1301, and the penetrating directions of the multiple pressure relief openings 1301 are not completely the same but are all located on a plane perpendicular to the first pressure relief direction Z, i.e., the multiple pressure relief openings 1301 are arranged around the pressure relief space 1302. The sizes of the multiple pressure relief openings 1301 are also not completely the same, and under the premise of ensuring the supporting strength of the support 13, the pressure relief openings 1301 with the largest total area can be arranged, i.e., the supporting strength of the support 13 is ensured and the pressure relief effect is also good.

[0106] In the embodiment, the second through hole 122 is substantially square, the support member 13 is substantially square, and at least one pressure relief opening 1301 is formed on each side of the square support member 13, and the pressure relief opening 1301 is arranged between the spacer member 12 and the top cover member 11. The pressure relief opening 1301 on the side of the support member 13 can be an open structure for easy processing. In other embodiments, the specific shape of the side wall 131 and the shape and number of the pressure relief opening 1301 can have other forms, which are not described here.

[0107] In the embodiment, the side of the spacer member 12 facing the top cover member 11 can also be provided with a plurality of pressure relief openings 123, which are configured to communicate with the adjacent pressure relief opening 1301.

[0108] It should be explained that the cover plate assembly 10 of the present application should include at least one support member 13 in the foregoing embodiments. That is, it can include a support member 13 connected to the top cover member 11 as shown in the embodiment. Figure 6 It can also include a support member 13 connected to the spacer member 12 as shown in the embodiments of Figure 7 and Figure 8 It can also include a support member 13 connected to the spacer member 12 as shown in the embodiments of Figure 6 and Figure 7 and Figure 8 When the cover plate assembly 10 simultaneously includes the support member 13 as shown in the embodiment of Figure 6 and the support member 13 as shown in the embodiments of Figure 7 and Figure 8 The two support members 13 can directly abut along the first pressure relief direction Z, which can be understood by those skilled in the art.

[0109] Further combining Figure 9 The present application also provides an electric core 2, which includes a shell 21, a pole core 22, and a cover plate assembly 10 according to any one of the foregoing embodiments. The shell 21 and the cover plate assembly 10 cooperate to form a containing space 20, and the pole core 22 is arranged in the containing space 20; wherein the support member 13 is arranged on the side of the spacer member 12 away from the pole core 22 along the first pressure relief direction Z.

[0110] It can be understood that the shell 21 and the cover plate assembly 10 are buckled to form the containing space 20, and the containing space 20 can be provided with a pole core 22, a diaphragm (not shown), and other structures, which are not described here.

[0111] Further, the shell 21 cooperates with the cover plate assembly 10 to form a containing space 20 for containing the pole core 22. When the battery cell 2 faces thermal runaway and the pole core 22 is pressed towards the side where the explosion-proof valve 141 is located, the support 13 can support the spacer ring 12 to make the spacer ring abut against the pole core 22, or the support 13 can directly support and limit the pole core 22, thereby avoiding the movement of the pole core 22 and avoiding the explosion-proof valve 141 being blocked to cause shell explosion or explosion, and improving the safety performance of the battery cell 2. At the same time, even if the front surface of the cover plate assembly 10 is blocked due to the movement of the pole core 22 or the melting of the plastic, the pressure relief port 1301 can still be used for exhaust pressure relief, so as to ensure that the explosion-proof valve 141 is not blocked after being opened, avoid causing shell explosion or explosion, and improve the safety performance of the battery cell 2.

[0112] Further combining Figure 10 As shown, the embodiments of the present application also provide a battery 3 comprising a plurality of battery cells 2 as described in the foregoing embodiments.

[0113] It can be understood that the battery 3 comprises a plurality of battery cells 2 connected in series and / or in parallel, and the plurality of battery cells 2 cooperate to supply power externally. The battery 3 can also comprise other structures, such as a power management assembly (BMS), a wire harness, etc., which are not described herein.

[0114] Further combining Figure 11 As shown, the embodiments of the present application also provide a vehicle 4 comprising a main body part 41, and a battery cell 2 as described in the foregoing embodiments, or a battery 3 as described in the foregoing embodiments; wherein the main body part 41 is electrically connected with the battery cell 2 or the battery 3.

[0115] It can be understood that the main body part 41 of the vehicle 4 can comprise a frame, an engine and / or a motor, a wire harness, a sensing system, and other structures, which are not described herein. The battery 3 is electrically connected with the main body part 41, and is used to provide kinetic energy for the vehicle 4.

[0116] Further, the battery 3 and the vehicle 4 apply the battery cell 2 described in the foregoing, and the safety performance of each battery cell 2 is improved, and the battery 3 and the vehicle 4 applying the battery cell 2 have better safety performance when facing thermal runaway risk.

[0117] In the foregoing, the specific embodiments of the present application are described with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that various changes and replacements can be made to the specific embodiments of the present application without departing from the spirit and scope of the present application. These changes and replacements are within the scope defined by the present application.

Claims

1. A cover assembly, characterized by The cover plate assembly comprises: a top cover member having a first through hole arranged through in a first pressure relief direction, the first through hole being configured to cooperate with an explosion-proof valve to achieve pressure relief; a spacer member arranged in a stack with the top cover member in the first pressure relief direction; a support member arranged between the top cover member and the spacer member in the first pressure relief direction and in contact with both of them respectively; wherein the support member comprises a side wall extending in the first pressure relief direction, the side wall having a pressure relief opening arranged through, the first through hole and the pressure relief opening being configured to communicate with an external environment respectively, and the through direction of the pressure relief opening intersects the first pressure relief direction.

2. The cover plate assembly of claim 1, wherein, The support member is integrally formed with the top cover member or is connected separately, the side wall is arranged around the first through hole, and an end surface of the support member away from the top cover member in the first pressure relief direction abuts against the spacer member.

3. The cover plate assembly of claim 1, wherein, The spacer member has a second through hole arranged through in the first pressure relief direction, and the support member has a pressure relief space arranged through in the first pressure relief direction, the side wall surrounding the pressure relief space, and the first through hole, the second through hole, and the pressure relief opening communicating with the pressure relief space respectively.

4. The cover plate assembly of claim 3, wherein, The support member is detachably connected with the spacer member, the side wall is configured to surround the second through hole, and an end surface of the support member away from the spacer member in the first pressure relief direction abuts against the top cover member.

5. The cover plate assembly of claim 3, wherein, The spacer member has a support step for abutting and limiting the support member, part of the side wall extends into the second through hole, and at least part of the pressure relief opening is located outside the second through hole.

6. The cover plate assembly of claim 1, wherein, The cover plate assembly further comprises a lower plastic member arranged between the top cover member and the spacer member in the first pressure relief direction, the lower plastic member having a third through hole arranged through in the first pressure relief direction, the support member being arranged through the third through hole, and the side wall abutting against the lower plastic member.

7. The cover plate assembly of claim 1, wherein, The number of the pressure relief openings is multiple, and the through directions of the multiple pressure relief openings are not completely the same.

8. An electric cell characterized by The cover plate assembly comprises: the cover plate assembly according to any one of claims 1 to 7; a housing cooperating with the cover plate assembly to form a containing space; a core arranged in the containing space; wherein the support member is arranged on a side of the spacer member away from the core in the first pressure relief direction.

9. A battery, characterized by A plurality of the core according to claim 8.

10. A vehicle characterized by comprising: The cover plate assembly comprises: a main body part; and the core according to claim 8 or the battery according to claim 9; wherein the main body part is electrically connected with the core or the battery. ​

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