Battery cover plate assembly and battery

Abstract

The utility model relates to the technical field of batteries, in particular to a battery cover plate assembly and a battery. The battery cover plate assembly comprises a cover plate body and an insulating part arranged on the surface of one side of the cover plate body, the size of the maximum distance between the edge of the insulating part located at the same end and the edge of the cover plate body is d, the thickness of the cover plate body is t, and d and t meet the relational expression that d / t is larger than or equal to 0.5 and smaller than or equal to 1.8. When the thickness t of the cover plate body and the size d of the maximum distance meet the relational expression, the clamping jaw can grab the battery cover plate assembly conveniently, and a good insulation effect is achieved between the cover plate body and the battery cell.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a battery cover assembly and a battery. Background Art

[0002] During battery assembly, after the battery cell and cover are assembled, the cover is typically gripped by chucks and the battery cell and cover are placed on the worktable of the final welding machine. The cover and battery casing are then welded together to form a sealed battery cell. Existing cover plates have a plastic pad on the side facing the battery cell to prevent short circuits between the cover and the battery cell.

[0003] When using the gripper to pick up the cover, the gripper usually grips the edge of the cover. Because the distance between the plastic pad and the edge of the cover is small, the gripper may interfere with the plastic pad, or the gripper may pick up the plastic pad, resulting in insufficient clamping force of the gripper, which may cause the cover to fall off, thus affecting the assembly of the battery. Utility Model Content

[0004] This application discloses a battery cover assembly and a battery, which solves the problem of insufficient clamping force when using claws to grip the cover.

[0005] To achieve the above objectives, this application provides the following technical solution:

[0006] A battery cover assembly includes a cover body and an insulating member disposed on one side surface of the cover body; the maximum distance between the edge of the insulating member located at the same end and the edge of the cover body is d, and the thickness of the cover body is t, wherein d and t satisfy the relationship 0.5≤d / t≤1.8.

[0007] The battery cover assembly provided in this application allows for a gap between the insulating component and the cover body. When the battery cover assembly is gripped by the claws, the claws can more easily grasp the edge of the cover body, preventing interference between the insulating component and the claws and ensuring proper gripping. Furthermore, the relationship between d and t satisfies 0.5 ≤ d / t ≤ 1.8. Within this range, the thicker the cover body, the greater its weight; correspondingly, the maximum gap dimension d needs to be larger, thus providing a greater gripping force when the claws hold the cover body. Conversely, when the cover body is thinner, its weight is smaller; correspondingly, the maximum gap dimension d can be smaller to improve the insulation effect while gripping the battery cover assembly. Therefore, when the thickness t of the cover body and the maximum gap dimension d satisfy the above relationship in this application, it facilitates the gripping of the battery cover assembly by the claws and provides good insulation between the cover body and the battery cell.

[0008] A battery includes a cell, a housing for encapsulating the cell, and a battery cover assembly of the present application. The battery cover assembly is fastened to the housing to form a cavity for encapsulating the cell, and an insulating member is disposed on the surface of the cover body facing the cell.

[0009] The battery provided in this application has a gap between the insulating component and the cover plate body. During battery assembly, the claws can grip the cover plate body corresponding to the gap, thereby reducing or avoiding interference between the insulating component and the claws. Furthermore, the cover plate body has high hardness, facilitating the claws' gripping of the battery cover plate assembly. In addition, the thickness t of the cover plate body and the maximum spacing d satisfy the relationship 0.5 ≤ d / t ≤ 1.8. That is, the maximum spacing d needs to be set according to the thickness t of the cover plate body to ensure that the maximum spacing d is within a suitable range. d will not be too small, so that the claws can grip the battery cover plate assembly and increase the clamping force, thereby reducing or avoiding the battery cover plate assembly from falling off; moreover, d will not be too large, to ensure good insulation between the cover plate body and the battery cell. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of a battery cover assembly according to an embodiment of this application;

[0011] Figure 2 This is a schematic diagram of the end of a battery cover assembly along its length according to an embodiment of this application;

[0012] Figure 3 This is a schematic diagram of the structure of a battery cover assembly according to another embodiment of this application;

[0013] Figure 4 This is a schematic diagram of the end of the battery cover assembly along the length direction according to another embodiment of this application;

[0014] Figure 5 This is a side view of a battery cover assembly according to another embodiment of this application;

[0015] Figure 6 This is a side view of the end of the battery cover assembly along the length direction according to another embodiment of this application;

[0016] Figure 7 This is a schematic diagram of the structure of the cover plate body according to one embodiment of this application;

[0017] Figure 8 This is a schematic diagram of the structure of an insulating component according to an embodiment of this application.

[0018] Reference numerals: 100 - Cover plate body; 110 - First pole; 120 - Second pole; 200 - Insulating component;

[0019] 10 - First gap; 20 - Second gap; 30 - Long side; 40 - Short side;

[0020] 01-Notch; 02-Injection hole; 03-Explosion-proof valve; 04-First through hole; 05-Second through hole. DETAILED DESCRIPTION

[0021] 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.

[0022] To facilitate understanding of the technical solutions in this application, the application scenarios of the battery cover assembly will be explained first.

[0023] A lithium battery includes a cell and a metal casing for encapsulating the cell. A battery cover assembly is fastened to the metal casing to form a cavity for encapsulating the cell. The battery cover assembly includes a cover body and an insulating element disposed on the surface of the cover body facing the cell. The cover body is typically made of metal, and the insulating element is used to maintain insulation between the cover body and the cell. The insulating element is typically made of plastic.

[0024] When assembling batteries, grippers are typically used to hold the battery cover assembly. The grippers usually grip the edge of the battery cover assembly. Because the distance between the insulating component and the edge of the cover body is small, the grippers may interfere with the insulating component, or the grippers may grip the insulating component. The insulating component is relatively soft, which may result in insufficient clamping force from the grippers, causing the battery cover assembly to fall off and thus affecting the battery assembly.

[0025] In view of this, this application provides a battery cover assembly. Figure 1 This is a schematic diagram of the structure of a battery cover assembly according to one embodiment of this application. Figure 2 This is a schematic diagram of the end structure of a battery cover assembly along its length according to an embodiment of this application. (Refer to...) Figure 1 and Figure 2 The battery cover assembly includes a cover body 100 and an insulating member 200 disposed on one side surface of the cover body 100. The maximum distance between the edge of the insulating member and the edge of the cover body located at the same end is d, and the thickness of the cover body is t, where d and t satisfy the relationship 0.5≤d / t≤1.8. The edge of the cover body refers to the area where the cover body and the insulating member do not overlap.

[0026] Please refer to Figure 2The meaning of the maximum spacing will be explained in detail below. Along the width direction x of the cover plate body 100, the dimension of the first gap 10 between the edge of the insulating member 200 located at the same end and the edge of the cover plate body 100 can be d, where d ≥ 0. Along the length direction y of the cover plate body 100, the dimension of the second gap 20 between the edge of the insulating member 200 located at the same end and the edge of the cover plate body 100 is d2, where d2 ≥ 0. Wherein, when d > d2, the maximum spacing d refers to the dimension d of the first gap 10. Conversely, when d2 > d, the maximum spacing d refers to the dimension d2 of the second gap 20.

[0027] In this application, when using the gripper claws to hold the battery cover assembly, the gripper claws can more easily grasp the edge of the cover body 100, reducing or avoiding interference between the insulating component 200 and the gripper claws, thus affecting the gripper claws' ability to hold the battery cover assembly. Furthermore, the maximum spacing dimension d and the thickness t of the cover body 100 satisfy the relationship 0.5 ≤ d / t ≤ 1.8. This means that the maximum spacing dimension d needs to be set according to the thickness t of the cover body 100 to ensure that the maximum spacing dimension d is within a suitable range, neither too small nor too large, thereby balancing the insulation effect between the cover body 100 and the battery cell with the clamping force of the gripper claws on the battery cover assembly.

[0028] It is understandable that when the gripper grasps the long side 30 of the battery cover assembly, a first gap 10 is required between the cover body 100 and the insulating component 200; when the gripper grasps the short side 40 of the battery cover assembly, a second gap 20 is required between the cover body 100 and the insulating component 200. The gap between the cover body 100 and the insulating component 200 can be either the first gap 10 or the second gap 20, or both, depending on the specific circumstances. In actual operation, the gripper typically grasps the long side 30 of the battery cover assembly.

[0029] In the optional embodiment, the relationship between d and the thickness t of the cover body 100 satisfies the formula 0.5≤d / t≤1.8. The thicker the cover body 100, the greater its weight, and the greater the clamping force required by the claws. Therefore, the maximum spacing dimension d needs to be larger to increase the clamping area of ​​the claws on the cover body 100, thereby ensuring that the cover body 100 will not deform due to the clamping of the claws. Conversely, when the cover body 100 is thinner, its weight is smaller, and the clamping force required by the claws is smaller. Therefore, the maximum spacing dimension d can be smaller, which can better improve the insulation effect while facilitating the clamping of the battery cover assembly by the claws.

[0030] The cover plate body 100 is typically made of metal, such as stainless steel, aluminum, or aluminum alloy. Understandably, the hardness of the material used to make the cover plate body 100 affects the gripping effect of the jaws. Higher hardness means the cover plate body 100 can withstand a greater clamping force; correspondingly, the maximum spacing dimension d can be relatively smaller, thus improving insulation performance while ensuring sufficient clamping force. Conversely, lower hardness means the cover plate body 100 can withstand a smaller clamping force; correspondingly, the maximum spacing dimension d needs to be larger to increase the gripping area of ​​the jaws, thereby ensuring the cover plate body 100 does not deform due to the gripping action of the jaws.

[0031] In an optional embodiment, when the material of the cover plate body 100 is aluminum, 0.7 ≤ d / t ≤ 1.8. For example, d / t can be 0.7, 0.8, 0.9, 1.0, 1.2, 1.4, 1.6 or 1.8.

[0032] In an optional embodiment, when the material of the cover plate body 100 is stainless steel, 0.5 ≤ d / t ≤ 1.3. For example, d / t can be 0.5, 0.6, 0.8, 1.0, 1.2 or 1.3.

[0033] In this embodiment, the optional solution is 1mm ≤ d ≤ 3mm. For example, d can be 1.0mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.2mm, 2.5mm, 2.8mm, or 3.0mm. Preferably, d can be 1.5mm.

[0034] In this embodiment, the optional solution is 1mm ≤ t ≤ 3mm. For example, t can be 1.5mm, 1.8mm, 2.0mm, 2.2mm, or 2.5mm. Preferably, t can be 2.0mm.

[0035] Figure 3 This is a schematic diagram of the structure of a battery cover assembly according to another embodiment of this application. Figure 4 This is a schematic diagram of the end of the battery cover assembly along its length, according to another embodiment of this application. Figure 5 This is a side view of a battery cover assembly according to another embodiment of this application. Figure 6 This is a side view of the end of the battery cover assembly along the length direction according to another embodiment of this application. Please refer to the following: Figures 3 to 6Along the width direction x of the cover body 100, at least one notch 01 is provided at each end of the insulating member 200, and at least one notch 01 is located at each end of the insulating member 200. Along the thickness direction z of the insulating member 200, the notch 01 penetrates the insulating member 200. The notch 01 can be used for gripping the battery cover assembly with claws. The maximum distance between the edge of the cover body 100 at the same end and the bottom wall of the notch 01 along the width direction x of the cover body 100 is equal to d. When the insulating member 200 has the aforementioned notch 01, the maximum distance between the edge of the insulating member 200 at the same end and the edge of the cover body 100 is the distance between the bottom wall of the notch 01 and the edge of the cover body 100 at the same end. Therefore, when the insulating member 200 has the aforementioned notch 01, there is no need to provide a first gap 10 and a second gap 20 between the cover body 100 and the insulating member 200. Of course, a first gap 10 and / or a second gap 20 may also be provided between the cover plate body 100 and the insulating component 200, depending on actual needs.

[0036] In an optional embodiment, when the insulating component 200 is provided with the above-mentioned notch 01, 0.5≤d / t≤1.5.

[0037] The number of notches 01 on the insulating component 200 can be one, two, three, four, five, six, etc., depending on actual needs. It is understood that the shape of the notches 01 can be a long strip notch or a trapezoidal notch, etc., depending on actual needs.

[0038] Continue to refer to Figure 4 Along the length y of the cover plate body 100, the distance between the notch 01 near the edge of the cover plate body 100 and the edge of the cover plate body 100 is A, and the length of the cover plate body 100 is B, where 0.015 ≤ A / B ≤ 0.15. It is understandable that the distance between the notch 01 and the edge of the insulating component 200 cannot be too small, as this may affect the strength of the insulating component 200. Conversely, if the notch 01 is too close to the center of the insulating component 200, it may cause unstable clamping by the claws or tilting of the battery cover assembly.

[0039] Wherein, along the length direction y of the cover plate body 100, the distance A between the notch 01 near the edge of the cover plate body 100 and the edge of the cover plate body 100 is 5mm≤A≤20mm. For example, A can be 5mm, 8mm, 10mm, 12mm, 15mm, 16mm, 18mm or 20mm.

[0040] The length B of the cover plate body 100 is 148mm ≤ B ≤ 310mm. For example, B can be 148mm, 150mm, 160mm, 170mm, 180mm, 190mm, 200mm, 220mm, 240mm, 260mm, 280mm or 310mm.

[0041] You can continue to refer to Figure 4 Along the width direction x of the cover body 100, at least one notch 01 located at both ends of the insulating member 200 is symmetrically arranged along the vertical line L of the width direction of the insulating member 200, so that the claws can extend into the two symmetrically arranged notches 01 and abut against the cover body 100, thereby more firmly clamping the battery cover assembly.

[0042] Continue to refer to Figure 4 Along the width direction x of the cover plate body, the maximum distance d between the edge of the cover plate body 100 at the same end and the bottom wall of the notch 01 is 2mm ≤ d ≤ 5mm. Within this range, d facilitates the gripper's clamping of the cover plate body 100 while ensuring good insulation between the battery cell and the cover plate body 100. For example, d can be 2mm, 3mm, 4mm, or 5mm, and the specific range of d can be set according to the material and thickness of the gripper.

[0043] You can continue to refer to Figure 4 Along the length direction y of the cover plate body 100, the size D2 of the notch 01 is 10mm≤D2≤20mm. For example, D2 can be 10mm, 12mm, 15mm, 18mm or 20mm, and the specific range of D2 can be set according to the size of the claw.

[0044] Figure 7 This is a schematic diagram of the structure of the cover plate body according to one embodiment of this application. Figure 8 This is a schematic diagram of the structure of an insulating member according to an embodiment of this application, with reference to... Figure 7 and Figure 8 The cover plate body 100 is provided with a first pole post 110 and a second pole post 120. The insulating member 200 is provided with a first through hole 04 for the first pole post 110 to pass through and a second through hole 05 for the second pole post 120 to pass through. The notch 01 needs to be spaced apart from the first through hole 04 to prevent the notch 01 from interfering with the first pole post 110. Similarly, the notch 01 needs to be spaced apart from the second through hole 05 to prevent the notch 01 from interfering with the second pole post 120.

[0045] In addition, the cover plate body 100 is provided with a liquid injection hole 02 and an explosion-proof valve 03. The notch 01 needs to be spaced apart from the liquid injection hole 02 to prevent interference between the notch 01 and the liquid injection hole 02; the notch 01 needs to be spaced apart from the explosion-proof valve 03 to prevent interference between the notch 01 and the explosion-proof valve 03.

[0046] In an optional embodiment, the cover plate body 100 and the insulating component 200 are detachably connected, and this application does not limit the connection method between the two. For example, they can be glued or snapped together.

[0047] Based on the same technical concept, this application also provides a battery, which includes a battery cell, a casing, and a battery cover assembly as described in various possible embodiments of this application. The battery cover assembly is fastened to the casing to form a cavity for encapsulating the battery cell. An insulating member is disposed on the surface of the cover body facing the battery cell, i.e., the insulating member is disposed facing the battery cell, so as to provide insulation between the cover body and the battery cell.

[0048] The battery can be a lithium-ion battery or a potassium-ion battery. Because it includes the battery cover assembly described in this application, the battery also has the advantages of easy gripping of the battery cover assembly by the clamps and convenient assembly.

[0049] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations of this application fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

Claims

1. A battery cover assembly, characterized in that, The battery cover assembly includes a cover body and an insulating component disposed on one side surface of the cover body; The maximum distance between the edge of the insulating element and the edge of the cover plate body located at the same end is d, and the thickness of the cover plate body is t, wherein d and t satisfy the relationship 0.5≤d / t≤1.

8.

2. The battery cover assembly according to claim 1, characterized in that, 1mm≤d≤3mm, 1mm≤t≤3mm.

3. The battery cover assembly according to claim 1, characterized in that, When the material used to prepare the cover plate body is aluminum, 0.7≤d / t≤1.

8.

4. The battery cover assembly according to claim 1, characterized in that, When the material of the cover plate body is stainless steel, 0.5≤d / t≤1.

3.

5. The battery cover assembly according to any one of claims 1-4, characterized in that, Along the width direction of the cover plate body, at least one notch is provided at each end of the insulating member, and along the thickness direction of the insulating member, the notch penetrates the insulating member; Wherein, along the width direction of the cover plate body, the maximum distance between the edge of the cover plate body at the same end and the bottom wall of the notch is equal to d.

6. The battery cover assembly according to claim 5, characterized in that, Along the length of the cover plate body, the distance between the notch near the edge of the cover plate body and the edge of the cover plate body is A, and the length of the cover plate body is B, where 0.015≤A / B≤0.

15.

7. The battery cover assembly according to claim 6, characterized in that, 5mm≤A≤20mm, 148mm≤B≤310mm.

8. The battery cover assembly according to claim 6, characterized in that, Along the length of the cover plate body, at least one notch at both ends of the insulating member is symmetrically arranged along the perpendicular bisector of the width direction of the insulating member; and / or, 0.5≤d / t≤1.

5.

9. The battery cover assembly according to claim 5, characterized in that, 2mm≤d≤5mm; and / or, Along the length of the cover plate body, the size of the notch is D2, where 10mm≤D2≤20mm.

10. A battery comprising a battery cover assembly as described in any one of claims 1-9, characterized in that, The battery includes a cell and a housing for encapsulating the cell, the battery cover assembly is fastened to the housing, and the insulating element is disposed toward the cell.

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