Cover plate, battery and battery module

Abstract

The utility model relates to the technical field of batteries, and discloses a cover plate, a battery and a battery module, the cover plate comprises a cover plate body, an insulating part and an adapter block, wherein the switching block is arranged on the outer edge of the inner wall surface of the insulating part, the switching block comprises a first side wall surface, and one end, facing the insulating part, of the insulating sheet is suitable for being fixed on the first side wall surface. According to the cover plate with the structure, the switching block is arranged on the inner wall surface of the insulating part, and one end, facing the opening, of the insulating sheet is fixed on the first side wall surface, so that the insulating sheet is fixed, the insulating sheet is prevented from loosening and shifting, the pole group is better insulated and protected, the insulating sheet is matched with the insulating part, the pole group is prevented from being in contact with the shell or the cover plate body, and short circuit is avoided. According to the utility model, the switching block is block-shaped, has high strength and does not deform in the hot melting process, so that the insulation sheet and the switching block can be tightly hot-melted, and the insulation sheet is ensured to effectively wrap the pole group, so that the insulation sheet is stably fixed on the switching block, and the risk of short circuit is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a cover plate, a battery and a battery module. Background Art

[0002] The battery includes a shell, a pole group and a cover plate. The pole group is arranged in the shell, and the cover plate is arranged on the shell opening. The cover plate includes a cover plate body and an insulating member. The insulating member is arranged on one side of the cover plate body facing the inside of the shell; the pole group is wrapped with an insulating sheet to prevent the pole group from contacting with the shell or the cover plate and causing a short circuit, or the pole group from colliding with the shell and being damaged. After the battery has been used for a period of time, due to vibration, collision, etc., the insulating sheet is easy to loosen and deform and cannot effectively wrap the pole group, resulting in the pole group contacting with the cover plate body or the shell and causing a short circuit. Utility Model Content

[0003] In view of this, the utility model provides a cover plate, a battery and a battery module to solve the problem in the prior art that the insulating sheet has a poor fixing effect and easily causes a battery short circuit.

[0004] In a first aspect, the utility model provides a cover plate, comprising:

[0005] Cover plate body;

[0006] An insulating member, arranged on the inner wall surface of the cover body;

[0007] The adapter block is arranged at the outer edge of the inner wall surface of the insulating member, and the adapter block includes a first side wall surface, and one end of the insulating sheet facing the insulating member is suitable for being fixed on the first side wall surface; the first side wall surface is flush with the outer peripheral wall of the insulating member, or the first side wall surface is located on the inner side of the outer peripheral wall of the insulating member.

[0008] Beneficial effects: The cover plate of this structure is provided with an adapter block on the inner wall surface of the insulating part, and the end of the insulating sheet facing the opening is fixed on the first side wall surface to fix the insulating sheet and prevent the insulating sheet from loosening and shifting, so as to better insulate and protect the pole group. The insulating sheet cooperates with the insulating part to prevent the pole group from contacting the shell or the cover plate body to avoid short circuit. The insulating sheet can be fixed on the adapter block by hot melting. The adapter block will be subjected to pressure during the hot melting process. When the adapter block is too thin, the adapter block is easy to deform during the hot melting process, resulting in poor hot melting effect, and the insulating sheet is easy to fall off the adapter block. The adapter block of the utility model is block-shaped, and the adapter block has high strength and will not deform during the hot melting process. The insulating sheet and the adapter block can be tightly hot-melted to ensure that the insulating sheet effectively wraps the pole group, so that the insulating sheet is stably fixed on the adapter block, reducing the risk of short circuit.

[0009] In an optional implementation, the adapter block is in a rectangular block shape, the length of the adapter block is d1, the width of the adapter block is d2, 9mm≤d1≤11mm, 4mm≤d2≤6mm.

[0010] Beneficial effects: The size and width of the adapter block are moderate to ensure the strength of the adapter block, while avoiding the adapter block being too large in size to occupy a large space, which is beneficial to ensuring the space utilization of the battery.

[0011] In an optional embodiment, the insulating member is in the shape of a rectangular plate, the insulating member has a long side and a wide side, the outer edges of the two wide sides of the inner wall surface of the insulating member are respectively provided with the adapter blocks, and the long sides of the adapter blocks extend along the width direction of the insulating member.

[0012] Beneficial effect: the insulating sheet is fixed on two adapter blocks at both ends of the length of the insulating part, and the distance between the two adapter blocks is long, so the insulating sheet can be stably fixed.

[0013] In an optional implementation, the height of the adapter block protruding from the inner wall surface of the insulating component is h, 5mm≤h≤7.5mm.

[0014] In an optional embodiment, the adapter block and the insulating member are integrally injection molded, a groove is provided on the outer wall surface of the insulating member, and the groove extends into the adapter block; a through hole is provided on the adapter block, and the through hole is connected to the groove.

[0015] Beneficial effect: It is conducive to the electrolyte flowing into the groove to flow out through the through hole in time, and the infiltration efficiency of the electrolyte to the electrode group is improved under the condition of a certain electrolyte injection amount.

[0016] In an optional embodiment, the through hole comprises a rectangular hole, the length of the rectangular hole is d3, the width of the rectangular hole is d4, 2mm≤d3≤4mm, 1mm≤d4≤2.5mm.

[0017] In an optional embodiment, a pole is provided on the cover plate body, and the pole is suitable for connecting to a pole ear through a connecting plate, and the connecting plate includes a first connecting portion and a second connecting portion provided on the first connecting portion, the first connecting portion is connected to the pole, and the second connecting portion is suitable for connecting to the pole ear; the second connecting portion is suitable for bending toward the first connecting portion along the connecting area between the second connecting portion and the first connecting portion by applying force with a bending tool; the width of the second connecting portion and the pole ear connection side is T; the distance between any one of the two end faces in the length direction of the adapter block and the edge of the long side of the insulating member adjacent to it is d5, and the width of the bending tool is W; 0.65T≤W≤0.9T, 0.7T≤d5≤T.

[0018] Beneficial effect: 0.7T≤d5≤T, which reserves enough space for the pressing knife to ensure that the second connecting part can be pressed down into place, ensure the accommodation space for the folded pole ear, and prevent the pole ear from tearing.

[0019] In an optional implementation, the width of the insulating member is d6, 0.36d6≤T≤0.43d6.

[0020] In the second aspect, the utility model also provides a battery, comprising the cover plate, shell, pole group and insulating sheet described in any one of the above, the pole group is arranged in the shell, the insulating sheet wraps the pole group, the cover plate is arranged on the opening of the shell, and the insulating sheet is fixed on the first side wall surface at one end facing the insulating member.

[0021] In a third aspect, the utility model also provides a battery module, comprising the above-mentioned battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a front view of a cover plate according to an embodiment of the utility model;

[0024] Figure 2 A side view of a cover plate in the width direction of an embodiment of the utility model;

[0025] Figure 3 A side view of a cover plate in the length direction of an embodiment of the utility model;

[0026] Figure 4 for Figure 1 A schematic diagram of the middle connecting piece from a first angle;

[0027] Figure 5 for Figure 1 A second angle schematic diagram of the middle connecting piece;

[0028] Figure 6 It is a schematic diagram of the insulating part and the adapter block.

[0029] Description of reference numerals:

[0030] 1. Cover plate body; 2. Insulating member; 201. Peripheral wall; 202. Outer wall surface; 203. Groove; 3. Adapter block; 301. First side wall surface; 302. Through hole; 4. Pole; 5. Connecting piece; 501. First connecting portion; 502. Second connecting portion; 6. Welding mark. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0032] An insulating sheet is wrapped around the electrode group of the battery to prevent the electrode group from contacting with the shell or cover plate and short-circuiting. The insulating sheet wraps the electrode group, and an opening is provided at one end of the insulating sheet facing the electrode group, and the opening is wrapped outside the insulating member 2, so that the insulating sheet cooperates with the insulating member 2 to provide reverse insulation protection for the electrode group. However, after the battery has been used for a period of time, due to vibration, collision, etc., the insulating sheet is easily loosened and deformed and cannot effectively wrap the electrode group, resulting in the electrode group contacting with the cover plate body 1 or the shell and short-circuiting.

[0033] The cover plate is assembled onto the battery housing, and the side of each structure facing the inner cavity of the housing is called the inner side, and the side facing away from the inner cavity of the housing is called the outer side.

[0034] Combine the following Figures 1 to 5 , describing an embodiment of the utility model.

[0035] According to an embodiment of the present utility model, on one hand, a cover plate is provided, including a cover plate body 1 , an insulating member 2 and a transfer block 3 .

[0036] Among them, the insulating part 2 is arranged on the inner wall surface of the cover body 1; the adapter block 3 is arranged on the outer edge of the inner wall surface of the insulating part 2, the adapter block 3 includes a first side wall surface 301, and the end of the insulating sheet facing the insulating part 2 is suitable for being fixed on the first side wall surface 301; the first side wall surface 301 is flush with the outer peripheral wall 201 of the insulating part 2, or the first side wall surface 301 is located on the inner side of the outer peripheral wall 201 of the insulating part 2.

[0037] The cover plate of this structure is provided with a transfer block 3 on the inner wall surface of the insulating member 2, and the end of the insulating sheet facing the opening is fixed on the first side wall surface 301 to fix the insulating sheet and prevent the insulating sheet from loosening and shifting, so as to better insulate and protect the pole group. The insulating sheet cooperates with the insulating member 2 to prevent the pole group from contacting the shell or the cover plate body 1 to avoid short circuit. The insulating sheet can be fixed on the transfer block 3 by hot melting. During the hot melting process, the transfer block 3 will be subjected to pressure. When the transfer block 3 is too thin, the transfer block 3 is easy to deform during the hot melting process, resulting in poor hot melting effect, and the insulating sheet is easy to fall off from the transfer block 3. The transfer block 3 of the utility model is block-shaped, and the transfer block 3 has high strength and will not deform during the hot melting process. The insulating sheet and the transfer block 3 can be tightly hot-melted to ensure that the insulating sheet effectively wraps the pole group, so that the insulating sheet is stably fixed on the transfer block 3, reducing the risk of short circuit.

[0038] Alternatively, if Figure 1 As shown, in one embodiment, the adapter block 3 is in a rectangular block shape, the length of the adapter block 3 is d1, the width of the adapter block 3 is d2, 9mm≤d1≤11mm, 4mm≤d2≤6mm. The size of the adapter block 3 is moderate, and the width of the adapter block 3 is moderate to ensure the strength of the adapter block 3, while avoiding the adapter block 3 being too large in size and occupying a large space, which is conducive to ensuring the space utilization of the battery.

[0039] In other embodiments, the cross-section of the adapter block 3 may also be semicircular, the adapter block 3 may also be cylindrical or other prisms other than quadrangular prisms, etc.; the shape of the adapter block 3 may be adjusted according to the shape of the pole group. When the pole group is cylindrical, the first side wall surface 301 of the adapter block 3 extends in an arc surface to fix the insulating sheet.

[0040] Optionally, in one embodiment, Figure 1 As shown, the insulating member 2 is in the shape of a rectangular plate, and has a long side and a wide side. The outer edges of the two wide sides of the inner wall surface of the insulating member 2 are respectively provided with adapter blocks 3, and the long sides of the adapter blocks 3 extend along the width direction of the insulating member 2. The insulating sheet is fixed on the two adapter blocks 3 at both ends of the length of the insulating member 2, and the distance between the two adapter blocks 3 is long, so that the insulating sheet can be stably fixed.

[0041] Specifically, in this embodiment, the two adapter blocks 3 are arranged at the middle position of the wide side of the insulating member 2, and the two adapter blocks 3 are arranged opposite to each other.

[0042] Preferably, in one embodiment, the outer peripheral wall 201 of the insulating member 2 is set inwardly at a short distance from the outer peripheral wall 201 of the cover body 1. The first side wall surfaces 301 of the two adapter blocks 3 are flush with the outer peripheral wall 201 of the insulating member 2, the insulating sheet wraps the five faces of the pole group, the insulating sheet is open toward one end of the insulating member 2, and the inner side wall of the open end of the insulating sheet is welded and fixed on the two first side wall surfaces 301 to fully utilize the space between the cover body 1 and the battery housing. Compared with the setting that the first side wall surface 301 is retracted inwardly from the outer peripheral wall 201 of the insulating member 2, a larger capacity pole group can be accommodated in the battery housing, thereby improving space utilization.

[0043] In other embodiments, the outer edges of the four sides of the inner wall surface of the insulating member 2 can be provided with a transfer block 3. The transfer block 3 can also be provided on the outer edges of the two long sides of the inner wall surface of the insulating member 2. A plurality of transfer blocks 3 can also be provided, and the plurality of transfer blocks 3 are arranged at intervals along the outer edges of the inner wall surface of the insulating member 2. The insulating member 2 can also be in the shape of a disc.

[0044] like Figure 2 As shown, the welding mark 6 of the insulating sheet on the first side wall surface 301 is rectangular, and the welding mark 6 is 8 mm long and 2 mm wide, so as to ensure the fixing strength and firmness of the insulating sheet and prevent the insulating sheet from being separated from the adapter block 3.

[0045] like Figure 2 and Figure 3 As shown, the height of the adapter block 3 protruding from the inner wall surface of the insulating part 2 is h, 5mm≤h≤7.5mm, to ensure the height of the first side wall 301, to ensure that the adapter block 3 has sufficient area to be hot-melt connected with the insulating sheet, and to ensure that the adapter block 3 is firmly fixed on the adapter block 3.

[0046] Optionally, in one embodiment, Figure 6 As shown, the adapter block 3 and the insulating member 2 are integrally injection molded, and a groove 203 is provided on the outer wall surface 202 of the insulating member 2, that is, the insulating member 2 is provided with a groove 203 on one side facing the cover body 1, and the groove 203 extends into the adapter block 3; the adapter block 3 is provided with a through hole 302, and the through hole 302 is connected to the groove 203. Since the height of the adapter block 3 is greater than the thickness of the insulating member 2, if the groove 203 is not provided, the adapter block 3 is easy to shrink and deform after the adapter block 3 and the insulating member 2 are integrally injection molded, so that the groove 203 is provided at the position corresponding to the adapter block 3 on the outer wall surface 202 of the insulating member 2 to reduce the wall thickness of the adapter block 3 and prevent the adapter block 3 from shrinking and deforming after injection molding. After the groove 203 is provided, the electrolyte flows into the groove 203 along the insulating member 2 and is easy to remain in the groove 203, resulting in the electrolyte being unable to effectively infiltrate the electrode group. In order to solve this problem, a through hole 302 is provided on the adapter block 3, and the through hole 302 is connected to the groove 203, so that the electrolyte flowing into the groove 203 can flow out through the through hole 302 in time, thereby improving the electrolyte infiltration efficiency of the electrode group under the condition of a certain electrolyte injection amount.

[0047] Alternatively, if Figure 1 As shown, in one embodiment, the through hole 302 includes a rectangular hole, the length of the rectangular hole is d3, the width of the rectangular hole is d4, 2mm≤d3≤4mm, 1mm≤d4≤2.5mm, and the through hole 302 is of moderate size to ensure that the electrolyte can flow out smoothly, while preventing the through hole 302 from being too large to reduce the strength of the adapter block 3, so as to ensure that the adapter block 3 can be tightly welded to the insulating sheet.

[0048] In other embodiments, the through hole 302 may also be a circular hole, an elliptical hole, a triangular hole, etc.

[0049] Alternatively, if Figure 1 As shown, the through hole 302 is arranged on a side of the outer wall of the adapter block 3 facing away from the insulating member 2 .

[0050] In other embodiments, the through hole 302 may also be provided on at least one of the four side walls of the adapter block 3 , as long as the through hole 302 connects the groove 203 and the outside of the adapter block so that the through hole 302 can guide the electrolyte to flow out of the groove 203 .

[0051] like Figure 1 , Figures 3 to 5 As shown, a pole 4 is provided on the cover body 1, and the pole 4 is suitable for connecting to the pole ear through a connecting piece 5. The connecting piece 5 includes a first connecting portion 501 and a second connecting portion 502 provided on the first connecting portion 501. The first connecting portion 501 is connected to the pole 4, and the second connecting portion 502 is suitable for connecting to the pole ear; the second connecting portion 502 is suitable for bending toward the first connecting portion 501 along the connecting area between the second connecting portion 502 and the first connecting portion 501 by applying force with a bending tool; the width of the second connecting portion 502 and the pole ear connection side is T; the distance between any of the two end faces in the length direction of the adapter block 3 and the edge of the long side of the insulating member 2 adjacent to it is d5, and the width of the bending tool is W; 0.65T≤W≤0.9T, 0.7T≤d5≤T, and the bending tool includes a pressing tool. As shown Figure 1 As shown, the distance between the side wall on the lower side of the adapter block 3 and the side wall on the lower side of the insulating member 2, and the distance between the side wall on the upper side of the adapter block 3 and the side wall on the upper side of the insulating member 2 is d5. After the first connection part 501 is connected to the pole 4, a press cutter is required to press and bend the second connection part 502 downward toward the first connection part 501. The distance d5 can accommodate the press cutter, which is the space reserved for the press cutter to bend. If d5 is too small, the press cutter cannot press the second connection part 502 into place, resulting in poor bending of the second connection part 502, reducing the space for the folded pole ear, and easily causing the pole ear to tear. For this reason, 0.7T≤d5≤T is set to reserve enough space for the press cutter to ensure that the second connection part 502 can be pressed into place, to ensure the space for accommodating the folded pole ear, and to prevent the pole ear from tearing.

[0052] like Figure 4 and Figure 5 As shown, the side where the second connection portion 502 is connected to the tab is the side of the second connection portion 502 away from the first connection portion 501 .

[0053] like Figure 1 As shown, the second connection part 502 is perpendicular to the first connection part 501 , and the connecting area therebetween is flush with the edge of the long side of the insulating member 2 . The pressing knife bends the second connection part 502 toward the first connection part 501 along the connecting area between the first connection part 501 and the second connection part 502 .

[0054] The pole 4 includes a positive pole and a negative pole, and the connecting piece 5 includes a positive connecting piece and a negative connecting piece. The first connecting portion of the positive connecting piece is welded to the positive pole, and the second connecting portion of the positive connecting piece is suitable for welding to the positive pole tab. Similarly, the first connecting portion of the negative connecting piece is welded to the negative pole, and the second connecting portion of the negative connecting piece is suitable for welding to the negative pole tab.

[0055] like Figure 1 As shown, two electrode groups or four electrode groups can be arranged in the battery. Accordingly, two positive electrode connecting pieces are connected to the positive electrode column, and two negative electrode connecting pieces are connected to the negative electrode column. The two positive electrode connecting pieces are arranged axially symmetrically, and the two negative electrode connecting pieces are arranged axially symmetrically. When the battery is provided with two electrode groups, the second connecting parts of the two positive electrode connecting pieces are respectively connected to the positive electrode ears of the two electrode groups. When the battery is provided with four electrode groups, the second connecting part of each positive electrode connecting piece is connected to the positive electrode ears of two adjacent electrode groups. The connection method of the negative electrode connecting piece and the negative electrode ear is the same as the connection method of the positive electrode connecting piece and the positive electrode ear.

[0056] like Figure 1 As shown, in one embodiment, the width of the insulating member 2 is d6, 0.36d6≤T≤0.43d6, and the width of the second connecting portion 502 on the side connected to the pole ear is moderate and does not exceed half of the width of the insulating member 2, ensuring that after the two oppositely arranged second connecting portions 502 are bent toward each other, the two opposite second connecting portions 502 are still located on the inner side of the insulating member 2; at the same time, the width of the second connecting portion 502 on the side connected to the pole ear is moderate, which can ensure the welding area of ​​the second connecting portion 502 and the pole ear, and ensure the welding firmness with the pole ear.

[0057] Optionally, in one embodiment, the insulating member 2 includes lower plastic; and the cover body 1 includes a plain aluminum sheet.

[0058] According to an embodiment of the utility model, on the other hand, a battery is also provided, including the above-mentioned cover plate, shell, electrode group and insulating sheet, the electrode group is arranged in the shell, the insulating sheet wraps the electrode group, the cover plate is arranged on the opening of the shell, and the end of the insulating sheet facing the insulating member 2 is fixed on the first side wall surface 301.

[0059] In the battery of this structure, a transfer block 3 is arranged on the inner wall surface of the insulating member 2, and the end of the insulating sheet facing the opening is fixed on the first side wall surface 301 to fix the insulating sheet and prevent the insulating sheet from loosening and shifting, so as to better insulate and protect the electrode group. The insulating sheet cooperates with the insulating member 2 to prevent the electrode group from contacting the shell or the cover body 1 to avoid short circuit. The transfer block 3 is block-shaped and has high strength, so that the insulating sheet and the transfer block 3 can be tightly hot-fused to ensure that the insulating sheet effectively wraps the electrode group, so that the insulating sheet is stably fixed on the transfer block 3, reducing the risk of short circuit.

[0060] The following describes the influence of the size of the adapter block 3, d5 and the through hole 302 on the performance of each phase of the battery in combination with different embodiments.

[0061] Embodiment 1: a transfer block 3, a groove 203 and a through hole 302 are provided; d1 is 10 mm, d2 is 5 mm, d3 is 2 mm, d4 is 1 mm, d5 is 15 mm, d6 is 40 mm, T is 16 mm, and the height h of the transfer block 3 is 5.5 mm.

[0062] Embodiment 2: a transfer block 3, a groove 203 and a through hole 302 are provided; d1 is 12 mm, d2 is 4 mm, d3 is 4 mm, d4 is 2 mm, d5 is 14 mm, d6 is 40 mm, T is 16 mm, and the height h of the transfer block 3 is 5.5 mm.

[0063] Embodiment 3: a transfer block 3, a groove 203 and a through hole 302 are provided; d1 is 12 mm, d2 is 5 mm, d3 is 4 mm, d4 is 2 mm, d5 is 19 mm, d6 is 50 mm, T is 20 mm, and the height h of the transfer block 3 is 5.5 mm.

[0064] Comparative Example 1: a transfer block 3, a groove 203 and a through hole 302 are provided; d1 is 10 mm, d2 is 1.5 mm, d5 is 15 mm, d6 is 40 mm, T is 16 mm, and the height h of the transfer block 3 is 5.5 mm.

[0065] Comparative Example 2: an adapter block 3, a groove 203 and a through hole 302 are provided; d1 is 20 mm, d2 is 5 mm, d3 is 2 mm, d4 is 1 mm, d5 is 10 mm, d6 is 40 mm, T is 16 mm (the minimum width of the pressing tool is 10.5 mm to ensure a better degree of pressing of the connecting piece 5), and the height h of the adapter block 3 is 5.5 mm.

[0066] Comparative Example 3: a transfer block 3 is provided, but a through hole 302 is not provided; d1 is 10 mm, d2 is 5 mm, d5 is 15 mm, d6 is 40 mm, T is 16 mm, and the height h of the transfer block 3 is 5.5 mm.

[0067] Among the above embodiments, Embodiment 1, Embodiment 2 and Embodiment 3 are all reasonably designed, and there are no abnormalities in the bending of the connecting piece 5 and the hot melting of the insulating piece and the adapter block 3; in Example 1, the adapter block 3 is too thin, and when the insulating piece and the adapter block 3 are hot-melted, the adapter block 3 is deformed, the hot melting effect is poor, and the insulating piece is easy to fall off from the adapter block 3; in Example 2, d5 is too small, and cannot meet the 90° pressing space of the pressing knife, resulting in poor bending of the connecting piece 5, affecting the folding ear space, and the ear tearing; in Example 3, the through hole 302 is cancelled, resulting in the electrolyte remaining in the groove 203, affecting the infiltration of the electrode group.

[0068] According to an embodiment of the present invention, on the other hand, a battery module is provided, comprising the above-mentioned battery.

[0069] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A cover plate, characterized in that: include: Cover plate body; An insulating member, arranged on the inner wall surface of the cover body; The adapter block is arranged at the outer edge of the inner wall surface of the insulating member, and the adapter block includes a first side wall surface, and one end of the insulating sheet facing the insulating member is suitable for being fixed on the first side wall surface; the first side wall surface is flush with the outer peripheral wall of the insulating member, or the first side wall surface is located on the inner side of the outer peripheral wall of the insulating member.

2. The cover plate according to claim 1, characterized in that: The adapter block is in a rectangular block shape, the length of the adapter block is d1, the width of the adapter block is d2, 9mm≤d1≤11mm, 4mm≤d2≤6mm.

3. The cover plate according to claim 2, characterized in that: The insulating member is in the shape of a rectangular plate and has a long side and a wide side. The outer edges of the two wide sides of the inner wall surface of the insulating member are respectively provided with the adapter blocks, and the long sides of the adapter blocks extend along the width direction of the insulating member.

4. The cover plate according to claim 1 or 2, characterized in that: The height of the adapter block protruding from the inner wall surface of the insulating member is h, 5mm≤h≤7.5mm.

5. The cover plate according to claim 1 or 2, characterized in that: The adapter block and the insulating member are integrally injection-molded. A groove is provided on the outer wall surface of the insulating member, and the groove extends into the adapter block. A through hole is provided on the adapter block, and the through hole is connected to the groove.

6. The cover plate according to claim 5, characterized in that: The through hole comprises a rectangular hole, the length of the rectangular hole is d3, the width of the rectangular hole is d4, 2mm≤d3≤4mm, 1mm≤d4≤2.5mm.

7. The cover plate according to claim 3, characterized in that: A pole is provided on the cover plate body, and the pole is suitable for connecting to a pole ear through a connecting plate, and the connecting plate includes a first connecting part and a second connecting part provided on the first connecting part, the first connecting part is connected to the pole, and the second connecting part is suitable for connecting to the pole ear; the second connecting part is suitable for bending toward the first connecting part along the connecting area between the second connecting part and the first connecting part by applying force with a bending tool; the width of the second connecting part and the pole ear connection side is T; the distance between any one of the two end faces in the length direction of the adapter block and the edge of the long side of the insulating member adjacent to it is d5, and the width of the bending tool is W; 0.65T≤W≤0.9T, 0.7T≤d5≤T.

8. The cover plate according to claim 7, characterized in that: The width of the insulating member is d6, 0.36d6≤T≤0.43d6.

9. A battery, characterized in that: It comprises the cover plate, shell, pole group and insulating sheet according to any one of claims 1 to 8, wherein the pole group is arranged in the shell, the insulating sheet wraps the pole group, the cover plate is arranged on the opening of the shell, and the insulating sheet is fixed to the first side wall surface at one end facing the insulating member.

10. A battery module, characterized in that: A battery comprising the battery of claim 9.

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