A cover plate, battery and vehicle

Abstract

The application provides a cover plate, a battery and a vehicle. The cover plate comprises a cover plate body, a first insulating piece located on a first surface of the cover plate body away from a pole group, the first insulating piece comprising a first side wall close to the cover plate body, and an extension edge extending outward is arranged on the outer periphery of the first side wall; and an insulating patch is attached to the first surface and is provided with a pole post avoiding hole passing through the first insulating piece, and the outer peripheral wall of the pole post avoiding hole is attached to the extension edge. As described above, the sealing connection between the outer peripheral wall of the pole post avoiding hole and the extension edge is realized through the coverage of the added extension edge, the gap between the insulating patch and the first insulating piece is avoided, and then the exposed area of the cover plate body exposed in the air is avoided, so that the accumulated condensed water cannot flow to the cover plate body any more, the short circuit between the cover plate body and the riveting block of the pole group assembly is avoided, the problem of the battery short circuit and the electrochemical corrosion of the cover plate and the shell is avoided, and the safety performance of the battery is greatly improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a cover plate, a battery including the cover plate, and a vehicle including the battery. Background Technology

[0002] The battery mainly consists of a casing, a cover plate, and electrode assemblies. The cover plate includes a cover plate body, electrode post assemblies mounted on the cover plate body, and plastic parts. The upper plastic part is located on the surface of the cover plate body away from the electrode assemblies, between the cover plate body and the riveting block of the electrode post assembly, to ensure insulation between the riveting block and the cover plate body. A top patch made of insulating material is attached to the first surface of the cover plate body to protect the cover plate body.

[0003] However, due to manufacturing tolerances of the top patch and the positioning tolerances of the equipment, a certain gap exists between the top patch and the upper plastic, creating an exposed area between the cover plate and the portion opposite this gap. For batteries used in environments with large temperature differences between day and night, water droplets will condense on the outer surface of the battery. When the battery is exposed to this environment for a long time, the condensed water droplets will gradually accumulate and form condensate. When the condensate flows to the exposed area of ​​the cover plate, it will conduct electricity between the cover plate and the rivet block, causing a short circuit in the battery and resulting in electrochemical corrosion of the cover plate and casing, which poses a significant danger. Utility Model Content

[0004] In view of this, the purpose of this application is to provide a cover plate, a battery and a vehicle, which solves the problem of short circuit between the rivet block and the cover plate body when the battery is used for a long time in an environment with large temperature differences between day and night.

[0005] This application provides a cover plate, comprising: The cover plate body has a first pole post through hole; The first insulating element is located on the first surface of the cover plate body away from the electrode group, and has a second electrode through hole opposite to the first electrode through hole. The first insulating element includes a first sidewall close to the cover plate body, and the outer periphery of the first sidewall is provided with an outwardly extending edge. An insulating patch is attached to the first surface and has a pole clearance hole that passes through the first insulating member, and the outer peripheral wall of the pole clearance hole is attached to the extension edge.

[0006] Beneficial effects: In this way, by covering the extended edge, the outer perimeter wall of the terminal clearance hole is sealed to the extended edge, avoiding the formation of an exposed area in the air on the cover plate body. Therefore, the accumulated condensate can no longer flow to the cover plate body, causing a short circuit between the cover plate body and the first terminal body (i.e., the riveting block) of the terminal assembly. This avoids the problem of electrochemical corrosion of the cover plate and shell due to battery short circuit, and greatly improves the safety performance of the battery.

[0007] Optionally, in the above cover plate, the first surface has a receiving groove recessed in the direction of the pole group, and the extended edge is located in the receiving groove.

[0008] Optionally, in the above-mentioned cover plate, The outer periphery of the extended edge is a quadrilateral. And / or, The outer periphery of the extended edge is adapted to the shape of the receiving groove; And / or, Along the thickness direction of the cover plate, the thickness of the extended edge is equal to the depth of the receiving groove.

[0009] Beneficial effects: The recessed groove avoids excessive overlap of the extended edge in the thickness direction of the cover plate, ensuring the volumetric energy density of the manufactured battery; the recessed groove forms a positioning space for installing the first insulating component, ensuring accurate and reliable installation of the first insulating component and guaranteeing the performance of the cover plate; the regular shapes of the extended edge and the recessed groove facilitate production, processing, and assembly. When the first insulating component is assembled on the cover plate body, the first sidewall and the extended edge are flush with the first surface of the cover plate body, ensuring that the insulating patch adheres flatly to the cover plate body and the extended edge, thereby ensuring complete adhesion between the insulating patch and the cover plate body and the extended edge, guaranteeing sealing and insulation.

[0010] Optionally, in the above cover plate, along the length direction of the cover plate, the length of the outer periphery of the extended side is L1, and the length of the pole clearance hole is L2, where L1 > L2.

[0011] Beneficial effects: Taking a ring structure with a rectangular extension side as an example, the extension side includes a short side perpendicular to the length direction of the cover plate and a long side perpendicular to the width direction of the cover plate. This allows the outer perimeter wall of the pole clearance hole (i.e., the solid structure of the insulating patch) to have a contact area overlapping with the short side of the extension side, thus ensuring reliable sealing and insulation of the insulating patch at the short side of the extension side, guaranteeing the performance of the cover plate. Furthermore, it allows for a certain margin of error in the installation of the insulating patch, ensuring sealing and insulation bonding effects.

[0012] Optionally, in the above-mentioned cover plate, along the length direction of the cover plate, the outer peripheral wall of the pole clearance hole and the extended edge have a first contact distance D1, where D1 > 0.5 mm.

[0013] Beneficial effects: As mentioned above, it can avoid the first bonding distance D1 being too small, thus ensuring the bonding effect of the insulating patch at the short side of the extended edge, and ensuring the insulation and sealing of the bonding connection between the two.

[0014] Optionally, in the above-mentioned cover plate, along the width direction of the cover plate, the width of the outer periphery of the extended edge is W1, and the width of the pole clearance hole is W2, where W1 > W2.

[0015] Beneficial effects: This allows the outer perimeter wall of the pole clearance hole (i.e., the solid structure of the insulating patch) to have a contact area overlapping with the long side of the extended edge, thereby ensuring a reliable sealing and insulating fit of the insulating patch at the long side of the extended edge, and guaranteeing the performance of the cover plate. Furthermore, it also allows for a certain margin of error in the installation of the insulating patch, ensuring a good sealing and insulating fit.

[0016] Optionally, in the above-mentioned cover plate, along the width direction of the cover plate, the outer peripheral wall of the pole clearance hole and the extension edge have a second fitting distance D2, where D2 > 0.3 mm.

[0017] Beneficial effects: It can prevent the second bonding distance D2 from being too small, and ensure the bonding effect of the insulating patch at the long side of the extension edge, thus ensuring the insulation and sealing of the bonding connection between the two.

[0018] Optionally, in the above-mentioned cover plate, the thickness of the extended edge along the thickness direction of the cover plate is H1, where 0.2mm≤H1≤1.4mm.

[0019] Beneficial effects: As mentioned above, it can ensure that the extended edge has sufficient thickness to avoid cracking or edge warping and ensure insulation; at the same time, it can also ensure that the thickness of the extended edge is not too large, reducing weight, saving costs, and ensuring the volumetric energy density of the battery.

[0020] A battery includes a housing, an electrode assembly disposed within the housing, and a cover plate as described above that seals an opening in the housing. Since the battery of this application has the cover plate described above, the beneficial effects of the cover plate on the battery are explained above and will not be repeated here.

[0021] A vehicle includes the battery as described above. Since the vehicle of this application includes the battery described above, the beneficial effects of the battery on the vehicle are described above and will not be repeated here.

[0022] In the cover plate, battery, and vehicle of this application, the cover plate body has a first surface away from the electrode assembly; an outwardly extending edge is provided on the outer periphery of the first sidewall of the first insulating member near the cover plate body; the outer periphery of the electrode clearance hole of the insulating patch attached to the first surface is attached to the extending edge; thus, by covering with the added extending edge, a sealed connection is achieved between the outer periphery of the electrode clearance hole and the extending edge, avoiding the formation of a gap between the insulating patch and the first insulating member, thereby preventing the cover plate body from forming an exposed area in the air. Therefore, the accumulated condensate cannot flow to the cover plate body again, causing a short circuit between the cover plate body and the rivet block of the electrode assembly, avoiding the problem of electrochemical corrosion of the cover plate and the shell due to battery short circuit, and greatly improving the safety performance of the battery; furthermore, the extending edge can be integrally set on the outer periphery of the first sidewall of the first insulating member. The first insulating member is an integral structure, which does not increase the number of parts of the cover plate, and the structure is simple and the assembly is convenient and quick. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application 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 only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is an exploded view of the cover plate according to an embodiment of this application.

[0025] Figure 2 This is a schematic diagram of the cover plate body according to an embodiment of this application.

[0026] Figure 3 This is a schematic diagram of the structure of the first insulating element in an embodiment of this application.

[0027] Figure 4 This is a schematic diagram of the structure of the insulating patch according to an embodiment of this application.

[0028] Figure 5 This is a dimensioned diagram of the cover plate according to an embodiment of this application.

[0029] superior Figures 1-5 middle: 1. Cover plate body; 2. First insulating component; 3. Insulating patch; 4. Terminal post assembly; 5. Second insulating component; 11. Receiving groove; 21. Extended edge; 31. Clearance hole; 41. Pole post body; 42. First pole post plate; 43. Second pole post plate; a) First surface; b) First pole through hole; c) Second pole through hole. Detailed Implementation

[0030] This application provides a cover plate, a battery, and a vehicle, which solves the problem of short circuit between the rivet block and the cover plate body when the battery is used for a long time in an environment with large temperature differences between day and night.

[0031] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] like Figures 1-5 As shown, this application embodiment provides a cover plate, which includes a cover plate body 1, a first insulating member 2, and an insulating patch 3. Please refer to... Figure 1 , Figure 2 The cover plate body 1 has a first pole post through hole b; the cover plate body 1 includes a first surface a away from the pole group. The first insulating member 2 is located on the first surface a of the cover plate body 1; please refer to Figure 1 , Figure 3 The first insulating member 2 has a second pole through hole c opposite to the first pole through hole b; the first insulating member 2 includes a first side wall d near the cover plate body 1, and an outwardly extending edge 21 is provided on the outer periphery of the first side wall d. Please refer to [link to relevant documentation]. Figure 1 , Figure 4 The insulating patch 3 is attached to the first surface a. The insulating patch 3 has a pole clearance hole 31 that passes through the first insulating member 2. The outer periphery of the pole clearance hole 31 is attached to the extension edge 21.

[0033] It should be noted that the cover plate body 1 is made of plain aluminum sheet. The cover plate body 1 includes a first surface a, which is away from the electrode group, and a second surface, which is away from the electrode group. The first surface a is the upper surface, and the second surface is the lower surface. A first insulating member 2 is provided on the upper surface of the cover plate body 1. The first insulating member 2 can be made of upper plastic. Further, a second insulating member 5 is provided on the lower surface of the cover plate body 1. The second insulating member 5 can be made of lower plastic. The second insulating member 5 has a through hole for a third electrode post. Optionally, the first insulating member 2 includes a first sidewall d and a circumferential sidewall connected to the outer periphery of the first sidewall d and extending in the direction away from the electrode group. The first sidewall d and the circumferential sidewall form an insulating space. The extending edge 21 has an annular structure. Further, the insulating patch 3, i.e., the top patch, is made of insulating material to protect the cover plate body 1.

[0034] Please see the appendix Figure 1The cover plate includes a pole assembly 4, which includes a pole body 41. The pole body 41 passes sequentially through the third pole through hole of the second insulating member 5, the first pole through hole b of the cover plate body 1, and the second pole through hole c of the first insulating member 2. Further, the pole assembly 4 also includes a first pole plate 42 (i.e., a riveting block) and a second pole plate 43. The first pole plate 42 is electrically connected to the end of the pole body 41 away from the pole group and is located within the insulating space enclosed by the first insulating member 2. The second pole plate 43 is electrically connected to the end of the pole body 41 near the pole group. The second pole plate 43 is electrically connected to the electrode tab and serves as the inner terminal of the pole assembly 4. The first pole plate 42 is connected to an external circuit and serves as the outer terminal of the pole assembly 4.

[0035] The phrase "the outer periphery of the first sidewall d is provided with an outwardly extending edge 21" means that it extends from the center point of the first sidewall d to the outer periphery of the first sidewall d; the extension edge 21 is a ring structure.

[0036] This application innovatively provides an outwardly extending edge 21 on the outer periphery of the first sidewall d of the first insulating member 2, and makes the outer periphery of the electrode clearance hole 31 of the insulating patch 3 fit into the extending edge 21; thus, by covering the added extending edge 21, a sealed connection is achieved between the outer periphery of the electrode clearance hole 31 and the extending edge 21, avoiding the formation of a gap between the insulating patch 3 and the first insulating member 2, thereby preventing the cover plate body 1 from forming an exposed area in the air. Therefore, the accumulated condensate cannot flow to the cover plate body 1, causing a short circuit between the cover plate body 1 and the first electrode plate 42 (i.e., the riveting block) of the electrode assembly 4, avoiding the problem of electrochemical corrosion of the cover plate and shell due to battery short circuit, and greatly improving the safety performance of the battery.

[0037] Furthermore, the extension edge 21 is integrally formed on the outer periphery of the first sidewall d, meaning that the first insulating component 2 is a single structure, without increasing the number of parts in the cover plate. This results in a simple structure and convenient, quick assembly. The extension edge 21 is made of the same material as the first sidewall d and is integrally injection molded from plastic.

[0038] Of course, the extension edge 21 can also be a separate structure from the first sidewall d. The extension edge 21 is a ring structure. The inner ring of the extension edge 21 can be sealed and insulatedly fixedly connected to the outer periphery of the first sidewall d by means of bonding or other methods.

[0039] Please see Figures 1-3 In some embodiments of this application, the first surface a is provided with a receiving groove 11 recessed in the direction of the pole group, and the extension edge 21 is located in the receiving groove 11.

[0040] Thus, on the one hand, the accommodating groove 11 can prevent the extended edge 21 from stacking too much size in the thickness direction of the cover plate, ensuring the volumetric energy density of the battery; on the other hand, the accommodating groove 11 forms a positioning space for installing the first insulating component 2, ensuring the accurate and reliable installation of the first insulating component 2, and ensuring the performance of the cover plate.

[0041] Please see Figure 1 , Figure 3 In some embodiments of this application, the outer periphery of the extended edge 21 is a quadrilateral.

[0042] Furthermore, the outer periphery of the extension edge 21 is adapted to the shape of the receiving groove 11. Optionally, the outer periphery of the extension edge 21 is rectangular, and correspondingly, the cross-sectional area of ​​the receiving groove 11 along the thickness direction of the cover plate is rectangular. As shown above, the regular shapes of the extension edge 21 and the receiving groove 11 facilitate production, processing, and assembly.

[0043] In some parallel embodiments, the shape of the outer periphery of the extension edge 21 is not limited; the shape of the outer periphery of the extension edge 21 can be any regular polygon or an irregular shape.

[0044] Please see Figures 1-3 In some embodiments of this application, the thickness of the extension edge 21 along the thickness direction of the cover plate is equal to the depth of the receiving groove 11.

[0045] As described above, when the first insulating component 2 is assembled on the cover plate body 1, the first side wall d and the extension edge 21 are flush with the first surface a of the cover plate body 1. This avoids step wrinkles in the insulating patch 3 due to the extension edge 21 not being on the same plane as the first surface a, ensuring that the insulating patch 3 is flatly attached to the cover plate body 1 and the extension edge 21, thereby ensuring complete adhesion between the insulating patch 3 and the cover plate body 1 and the extension edge 21, and ensuring sealing and insulation.

[0046] Please see Figure 5 In some embodiments of this application, along the length direction of the cover plate, the length of the outer periphery of the extended edge 21 is L1, and the length of the pole post clearance hole 31 is L2, where L1 > L2.

[0047] It should be noted that, please refer to the appendix. Figure 1 The length direction, width direction, and thickness direction of the cover plate, i.e., the attached... Figure 1 The three arrows indicate the directions respectively.

[0048] It should be further explained that the extension side 21 is a rectangular ring structure, including a short side portion perpendicular to the length direction of the cover plate and a long side portion perpendicular to the width direction of the cover plate.

[0049] Thus, along the length of the cover plate, the projection of the outer periphery of the pole clearance hole 31 along the thickness direction of the cover plate falls within the projection of the extension edge 21 along the thickness direction of the cover plate. This ensures that the outer periphery of the pole clearance hole 31 (i.e., the solid structure of the insulating patch 3) has a bonding area overlapping with the short side of the extension edge 21, thereby ensuring a reliable sealing and insulating bonding effect of the insulating patch 3 at the short side of the extension edge 21, and guaranteeing the performance of the cover plate. Furthermore, it also allows for a certain margin of error in the bonding and installation of the insulating patch 3, ensuring a sealing and insulating bonding effect.

[0050] In some embodiments of this application, along the length of the cover plate, the outer peripheral wall of the pole post clearance hole 31 and the extension edge 21 have a first contact distance D1, where D1 ≥ 0.5 mm. For example, D1 can be any one of 0.5 mm, 0.6 mm, 0.8 mm, etc.

[0051] As described above, this avoids the first bonding distance D1 being too small, thus ensuring the bonding effect of the insulating patch 3 at the short side of the extension edge 21, and ensuring the insulation and sealing of the bonding connection between the two.

[0052] In some embodiments of this application, along the width direction of the cover plate, the width of the outer periphery of the extended edge 21 is W1, and the width of the pole clearance hole 31 is W2, where W1 > W2.

[0053] Thus, along the width direction of the cover plate: the projection of the outer periphery of the pole clearance hole 31 along the thickness direction of the cover plate falls within the projection of the extension edge 21 along the thickness direction of the cover plate. This ensures that the outer periphery of the pole clearance hole 31 (i.e., the solid structure of the insulating patch 3) has a bonding area overlapping with the long side of the extension edge 21, thereby ensuring a reliable sealing and insulating bonding effect of the insulating patch 3 at the long side of the extension edge 21, and guaranteeing the performance of the cover plate. Furthermore, it can also provide a certain amount of error for the bonding and installation of the insulating patch, ensuring the sealing and insulating bonding effect.

[0054] In some embodiments of this application, along the width direction of the cover plate, the outer peripheral wall of the pole post clearance hole 31 and the extension edge 21 have a second contact distance D2, where D2 > 0.3 mm. For example, D2 can be any one of 0.3 mm, 0.4 mm, 0.6 mm, etc.

[0055] As described above, this avoids the second bonding distance D2 being too small, thus ensuring the bonding effect of the insulating patch 3 at the long side of the extension edge 21, and ensuring the insulation and sealing of the bonding connection between the two.

[0056] In some embodiments of this application, the thickness of the extended edge 21 along the thickness direction of the cover plate is H1, where 0.2mm ≤ H1 ≤ 1.4mm. For example, H1 can be any one of 0.2mm, 0.8mm, 1.4mm, etc.

[0057] As described above, this ensures that the extension edge 21 has sufficient thickness to prevent cracking or edge warping and to guarantee insulation; at the same time, it ensures that the thickness of the extension edge 21 is not too large, reducing weight, saving costs, and ensuring the volumetric energy density of the battery.

[0058] It should be noted that in some parallel embodiments, L1=L2, W1=W2, that is, the pole post clearance hole is sealed and insulated and fits snugly to the outer circumferential contour of the extension edge 21.

[0059] In summary, this application also provides a battery, which includes a housing, an electrode assembly disposed within the housing, and a cover plate as described above that seals the opening of the housing.

[0060] Since the battery of this application has the cover plate described above, the beneficial effects of the cover plate on the battery are described above and will not be repeated here.

[0061] In summary, this application also provides a vehicle that includes the battery described above.

[0062] Since the vehicle described in this application includes the battery mentioned above, the beneficial effects of the battery on the vehicle are described above and will not be repeated here.

[0063] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0064] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0065] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0066] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0067] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A cover plate, characterized in that, include: The cover plate body has a first pole post through hole; The first insulating element is located on the first surface of the cover plate body away from the electrode group, and has a second electrode through hole opposite to the first electrode through hole. The first insulating element includes a first sidewall close to the cover plate body, and the outer periphery of the first sidewall is provided with an outwardly extending edge. An insulating patch is attached to the first surface and has a pole clearance hole that passes through the first insulating member, and the outer peripheral wall of the pole clearance hole is attached to the extension edge.

2. The cover plate according to claim 1, characterized in that, The first surface has a receiving groove recessed in the direction of the pole group, and the extended edge is located in the receiving groove.

3. The cover plate according to claim 2, characterized in that, The outer periphery of the extended edge is a quadrilateral. And / or, The outer periphery of the extended edge is adapted to the shape of the receiving groove; And / or, Along the thickness direction of the cover plate, the thickness of the extended edge is equal to the depth of the receiving groove.

4. The cover plate according to claim 1, characterized in that, Along the length of the cover plate, the length of the outer periphery of the extended edge is L1, and the length of the pole clearance hole is L2, where L1 > L2.

5. The cover plate according to claim 4, characterized in that, Along the length of the cover plate, the outer perimeter wall of the pole clearance hole and the extended edge have a first contact distance D1, where D1 > 0.5 mm.

6. The cover plate according to claim 1, characterized in that, Along the width direction of the cover plate, the width of the outer periphery of the extended edge is W1, and the width of the pole clearance hole is W2, where W1 > W2.

7. The cover plate according to claim 6, characterized in that, Along the width direction of the cover plate, the outer periphery of the pole post clearance hole and the extended edge have a second contact distance D2, where D2 > 0.3 mm.

8. The cover plate according to any one of claims 1-7, characterized in that, Along the thickness direction of the cover plate, the thickness of the extended edge is H1, where 0.2mm ≤ H1 ≤ 1.4mm.

9. A battery, characterized in that, It includes a housing, an electrode assembly disposed within the housing, and a cover plate as described in any one of claims 1-8 that covers the opening of the housing.

10. A vehicle, characterized in that, Includes the battery as described in claim 9.

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