Battery shell assembly and battery
By setting a recess in the electrode connection and fixing the insulator, the problem of melting and bonding the insulator on the battery cell during welding is solved, and the convenient disassembly of the battery cell and the convenience of later maintenance is achieved.
Patent Information
- Application Number
- CN202421317093.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-11
- Publication Date
- 2025-04-01
- Estimated Expiration
- 2034-06-11
AI Technical Summary
During welding, the insulating parts melt and bond to the battery cell, resulting in inconvenient disassembly of the battery cell.
A recess is provided on the large surface of the electrode connection portion, and an insulator is fixed thereon, increasing the heat dissipation area to reduce melting of the insulator, and providing accommodation space to avoid bonding to the insulator with the battery cell.
By increasing the heat dissipation area and providing accommodation space, the melting of the insulator is effectively reduced, and the bonding between the insulator and the battery cell is avoided, which improves the disassembly convenience of the battery cell and facilitates later maintenance.
Smart Images
Figure CN222705775U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the field of battery technology, and in particular to a battery housing assembly and a battery. Background Art
[0002] A battery device is often provided in an electric vehicle, and the battery device is used to provide power to the electric vehicle. A plurality of batteries are integrated in the battery device, and the battery includes a battery cell and a pole, and the battery cell and the pole are electrically connected. In order to facilitate the connection between the pole and the battery cell, the pole and the battery cell are often connected through an adapter, and the adapter connects the pole and the battery cell by welding. When the battery cell and the adapter are welded, a lot of heat will be generated, and the heat will melt the insulating member provided on the adapter. After the insulating member melts, it will adhere to the battery cell, making it inconvenient to disassemble the battery cell.
[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention
[0004] The purpose of the present disclosure is to provide a battery housing assembly and a battery, thereby solving the problem of inconvenience in disassembling a battery cell due to adhesion of an insulating member and a battery cell caused by welding, at least to a certain extent.
[0005] According to one aspect of the present disclosure, a battery housing assembly is provided, the battery housing assembly comprising:
[0006] Battery housing;
[0007] A pole assembly, the pole assembly being disposed on a first surface of the battery housing;
[0008] An adapter, the adapter comprising a pole connecting portion and a pole lug connecting portion, the pole connecting portion being parallel to the first surface of the battery housing, the large surface of the pole lug connecting portion and the pole connecting portion having an angle of 85°-105°, the pole connecting portion being used to electrically connect the pole assembly, the pole lug connecting portion being used to electrically connect the pole lug, and the large surface of the pole lug connecting portion being formed with a recessed portion;
[0009] An insulating member is arranged and fixed on the large surface of the pole lug connecting portion, and the insulating member at least partially covers the recessed portion.
[0010] According to another aspect of the present disclosure, there is provided a battery, comprising:
[0011] The battery housing assembly described above;
[0012] A battery cell comprises a battery cell body and a tab extending from the battery cell body, wherein the tab and the tab connecting portion are welded to form a welding area, and the welding area and the recessed portion are respectively located on two large surfaces of the tab connecting portion.
[0013] The battery shell assembly provided by the embodiment of the present disclosure includes a battery shell, a pole assembly and an adapter. The pole assembly is arranged in the battery shell, and the adapter includes a pole connecting part and a pole lug connecting part. The pole connecting part is connected to the pole, and the pole lug connecting part is used to connect the pole lug of the battery cell. A recessed part is formed on the large surface of the pole lug connecting part, and an insulating part is arranged on the large surface of the pole lug connecting part. By providing the recessed part on the large surface of the pole lug connecting part, the heat dissipation area of the pole lug connecting part is increased, and the heat can be dissipated quickly during welding, reducing the melting of the insulating part, and the recessed part provides a accommodating space. After the insulating part melts, it flows to the accommodating space, thereby avoiding the adhesion of the melted insulating part and the battery cell, improving the convenience of disassembly of the battery cell, and facilitating later maintenance.
[0014] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.
[0016] Figure 1 A schematic structural diagram of a battery housing assembly provided for an exemplary embodiment of the present disclosure;
[0017] Figure 2 A schematic structural diagram of a transfer component provided for an exemplary embodiment of the present disclosure;
[0018] Figure 3 A schematic diagram of the structure of a battery provided for an exemplary embodiment of the present disclosure;
[0019] Figure 4 A schematic structural diagram of another battery provided by an exemplary embodiment of the present disclosure.
[0020] Description of reference numerals:
[0021] 100, battery shell assembly; 10, battery shell; 11, cover plate; 20, pole assembly; 30, adapter; 31, pole ear connection part; 32, pole column connection part; 301, recessed part; 200, battery cell; 210, pole ear; 300, battery shell. DETAILED DESCRIPTION
[0022] The following will be combined with the accompanying drawings in the exemplary embodiments of the present disclosure to clearly and completely describe the technical solutions in the exemplary embodiments of the present disclosure. The exemplary embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the present disclosure. Therefore, it should be understood that various modifications and changes can be made to the exemplary embodiments without departing from the scope of protection of the present disclosure.
[0023] In the description of the present disclosure, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more; the term "and / or" includes any and all combinations of one or more associated listed items. In particular, reference to "the / the" object or "an" object is also intended to indicate one of a possible plurality of such objects.
[0024] Unless otherwise specified or explained, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.
[0025] Further, in the description of the present disclosure, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the exemplary embodiments of the present disclosure are described at the angles shown in the accompanying drawings and should not be understood as limitations on the exemplary embodiments of the present disclosure. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to another element (one or more) "upper", "lower", or "inner", "outer", it can not only be directly connected to the other (one or more) elements "upper", "lower", "inner", "outer", but also can be indirectly connected to the other (one or more) elements "upper", "lower", "inner", "outer" through an intermediate element.
[0026] The exemplary embodiment of the present disclosure first provides a battery housing assembly 100, such as Figure 1 , Figure 2 and Figure 3As shown, the battery housing assembly 100 includes: a battery housing 10, a pole assembly 20, an adapter 30 and an insulating member; the pole assembly 20 is arranged on the first surface of the battery housing 10; the adapter 30 includes a pole connection portion 32 and a pole lug connection portion 31, the pole connection portion 32 is parallel to the first surface of the battery housing 10, the large surface of the pole lug connection portion 31 and the pole connection portion 32 have an angle, and the angle of the angle is 85°-105°, the pole connection portion 32 is used to electrically connect the pole assembly 20, the pole lug connection portion 31 is used to electrically connect the pole lug 210, and the large surface of the pole lug connection portion 31 is formed with a recessed portion 301. The insulating member is arranged and fixed on the large surface of the pole lug connection portion 31, and the insulating member at least partially covers the recessed portion 301.
[0027] The battery shell assembly 100 provided in the embodiment of the present disclosure includes a battery shell 10, a pole assembly 20 and an adapter 30. The pole assembly 20 is arranged in the battery shell 10. The adapter 30 includes a pole connecting portion 32 and a pole lug connecting portion 31. The pole connecting portion 32 is connected to the pole. The pole lug connecting portion 31 is used to connect the pole lug 210 of the battery cell 200. A recessed portion 301 is formed on the large surface of the pole lug connecting portion 31, and an insulating member is arranged on the large surface of the pole lug connecting portion 31. By providing the recessed portion 301 on the large surface of the pole lug connecting portion 31, the heat dissipation area of the pole lug connecting portion 31 is increased, and the heat can be quickly dissipated during welding, reducing the melting of the insulating member, and the recessed portion 301 provides a accommodating space. After the insulating member melts, it flows to the accommodating space, thereby avoiding the melted insulating member and the battery cell 200 from adhering to each other, improving the convenience of disassembling the battery cell 200, and facilitating later maintenance.
[0028] The following is a detailed description of each part of the battery housing assembly 100 provided in the embodiment of the present disclosure:
[0029] At least one mounting hole may be provided on the first surface of the battery housing 10, and the pole assembly 20 includes at least one pole, which is inserted into the mounting hole on the cover plate 11, and an insulating ring or the like may be provided between the pole and the battery housing 10 to achieve insulation between the pole and the battery housing 10. The number of mounting holes on the battery housing 10 is the same as the number of poles, and the poles correspond to the mounting holes one by one.
[0030] For example, the first surface of the battery housing 10 may be the surface where the cover plate 11 is located. Figure 4 As shown, the cover plate 11 is a part of the battery housing 10, and the cover plate 11 forms an end wall of the battery housing 10. For example, the battery housing 10 may include a shell body and a top wall, and the shell body is provided with a receiving cavity with an opening, and the top wall blocks the opening of the receiving cavity. The top wall and the shell body are separate molding structures, and the top wall and the shell body are connected by welding or the like, and the top wall is the cover plate 11.
[0031] It is understandable that in other embodiments, the cover plate 11 may also be a wall on the shell body. For example, the shell body may include a bottom wall opposite to the top wall, and a side wall between the top wall and the bottom wall, and the bottom wall and the side wall are an integrally formed structure. The cover plate 11 may be the bottom wall of the shell body, or the cover plate 11 may also be one of the side walls.
[0032] The pole assembly 20 may include at least one pole, and the pole includes a main body, a first connection part, and a second connection part. The main body is inserted into the mounting hole on the cover plate 11, the first connection part is located on the outside of the cover plate 11, and the first connection part is connected to one end of the main body, and the first connection part is used to electrically connect a conductive member (such as a busbar, etc.). The second connection part is located on the inside of the cover plate 11, and the second connection part is connected to the other end of the main body, and the second connection part is used to connect the battery cell 200.
[0033] For example, the first pole and the second pole, the first pole is a positive pole, and the second pole is a negative pole. The cover plate 11 is provided with a first mounting hole and a second mounting hole, the first pole is passed through the first mounting hole, and the second pole is passed through the second mounting hole. Of course, in actual applications, a pole can also be provided on the cover plate 11, the pole is passed through the cover plate 11, the pole is one electrode of the battery, and the cover plate 11 is another electrode of the battery, and the embodiments of the present disclosure are not limited thereto.
[0034] Furthermore, the pole assembly 20 may also include an insulating ring, which is sleeved on the pole, and the insulating ring isolates the pole and the cover plate 11 to achieve insulation between the pole and the cover plate 11. For example, the insulating ring may include a ring body, a first flange and a second flange, the ring body is an annular structure, the ring body is arranged around the pole, the first flange is arranged on the outer surface of the ring body, the second flange is arranged on the outer surface of the ring body, and there is a gap between the first flange and the second flange, the first flange and the second flange are respectively located on both sides of the cover plate 11, that is, the cover plate 11 is clamped by the first flange and the second flange, so that the creepage distance between the pole and the cover plate 11 is improved, thereby improving the safety of the battery. When the pole assembly 20 includes a first pole and a second pole, the first pole is sleeved with a first insulating ring, and the second pole is sleeved with a second insulating ring.
[0035] The adapter 30 is used to electrically connect the pole assembly 20 and the battery cell 200. The adapter 30 includes a pole connection portion 32 and a tab connection portion 31. The pole connection portion 32 is connected to the tab connection portion 31. The pole connection portion 32 is used to electrically connect the pole, and the tab connection portion 31 is used to electrically connect the tab 210 of the battery cell 200. For example, the pole connection portion 32 is welded to the pole, and the tab connection portion 31 is welded to the tab 210.
[0036] The adapter 30 may be a sheet-like structure, for example, the adapter 30 is formed by bending a sheet-like profile. The sheet-like profile is bent into a right-angle structure, one side of the right-angle structure corresponds to the pole connection portion 32, and the other side of the right-angle structure corresponds to the pole lug connection portion 31. That is, in one embodiment, the pole connection portion 32 and the pole lug connection portion 31 are arranged vertically. Of course, in actual applications, the pole connection portion 32 and the pole lug connection portion 31 may not be vertical, and the embodiments of the present disclosure are not limited thereto.
[0037] It should be noted that the tab connection portion 31 mentioned in the embodiment of the present disclosure refers not only to the area (weld print area) where the tab 210 and the adapter 30 are directly welded, but the tab connection portion 31 can also be understood as the entire area coplanar with the weld print area. When the adapter 30 is a right-angle structure, the adapter 30 includes two right-angle surfaces that are perpendicular to each other, and the tab connection portion 31 refers to the right-angle surface on the adapter 30 that is welded to the tab 210. The tab connection portion 31 has two relatively large surfaces and a small surface located between the two large surfaces, and the area of the large surface is larger than the area of the small surface.
[0038] A recessed portion 301 is formed on the first surface of the pole lug connection portion 31, and an insulating member is provided on the first surface of the pole lug connection portion 31. For example, the first surface of the pole lug connection portion 31 is provided with a recessed portion 301, and the second surface of the pole lug connection portion 31 is welded to the pole lug 210. That is, an insulating member is provided on the side of the pole lug connection portion 31 away from the weld mark, and the insulating member is used to achieve insulation between the battery cell 200 and the adapter 30. A recessed portion 301 is provided on the surface of the pole lug connection portion 31 where the insulating member is provided. The recessed portion 301 can increase the heat dissipation area of the adapter 30, thereby accelerating the heat dissipation, and can effectively prevent the pole lug connection portion 31 from overheating during welding. Furthermore, the recessed portion 301 forms an accommodating space on the surface of the pole lug connection portion 31, and when the insulating member melts, it will flow into the accommodating space, thereby avoiding the insulating member from being bonded to the battery cell 200 after melting.
[0039] Optionally, the depth of the recessed portion 301 is 0.01 mm-0.5 mm, and the depth of the recessed portion 301 is the dimension of the recessed portion 301 in a direction perpendicular to the first surface. For example, the depth of the recessed portion 301 is 0.01 mm, 0.02 mm, 0.03 mm, 0.05 mm, 0.08 mm, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm or 0.5 mm, etc.
[0040] By setting the depth of the recess 301 to 0.01mm-0.5mm, on the one hand, the heat dissipation area is increased and a space is formed to accommodate the fluid after the insulating layer is melted. On the other hand, it also avoids the depth of the recess 301 being too deep to affect the current flow performance of the adapter 30, thereby ensuring the safety of the battery.
[0041] The tab connection portion 31 is provided with a plurality of recessed portions 301, and the spacing between two adjacent recessed portions 301 is 0.03 mm to 0.15 mm. For example, the spacing between two adjacent recessed portions 301 may be 0.03 mm, 0.04 mm, 0.05 mm, 0.07 mm, 0.08 mm, 0.1 mm, 0.13 mm, 0.14 mm, 0.145 mm or 0.15 mm.
[0042] By setting the spacing between two adjacent recesses 301 to 0.03mm-0.15mm, the density of the recesses 301 on the pole ear connecting portion 31 is ensured to be reasonable. On the one hand, the problem of reduced current flow capacity of the adapter 30 due to excessive density of the recesses 301 is avoided. On the other hand, the problem of low heat dissipation capacity and insufficient accommodation space due to too small density of the recesses 301 is avoided.
[0043] Optionally, the recessed portion 301 includes a plurality of grooves, for example, the recessed portion 301 may include a plurality of grooves arranged in parallel, or the recessed portion 301 may include a plurality of grooves arranged in an alternating manner. There is a spacing between adjacent grooves in the plurality of grooves, and the spacing between adjacent grooves is 0.03 mm-0.15 mm.
[0044] The recessed portion 301 includes at least one first groove and at least one second groove, the first groove and the second groove are connected to each other, and the extension direction of the first groove is perpendicular to the extension direction of the second groove. By connecting the first groove and the second groove to each other, the circulation and storage of the liquefied insulating member are facilitated.
[0045] For example, the tab connection portion 31 is rectangular or approximately rectangular in structure, and the tab connection portion 31 has a length direction and a width direction that are perpendicular to each other. The first groove extends along the length direction of the tab connection portion 31, and the first groove penetrates the tab connection portion 31 along the length direction. The second groove extends along the width direction of the tab connection portion 31, and the second groove penetrates the tab connection portion 31 along the width direction.
[0046] The cross-sectional area of the recessed portion 301 decreases in the direction away from the insulating member, and the cross section is a cross section parallel to the first surface of the pole ear connecting portion 31. That is, the groove has a first side wall and a second side wall, the first side wall and the second side wall are two side walls along the extending direction of the groove, the spacing between the first side wall and the second side wall of the groove is the width of the groove, and the width of the groove decreases as it moves away from the insulating member. For example, the cross section of the recessed portion 301 is an inverted triangle or an inverted trapezoidal structure.
[0047] By setting the cross-sectional area of the recess 301 to decrease in the direction away from the insulating member, the cross-sectional area of the recess 301 is gradually reduced, which is beneficial to the flow of the insulating member after high-temperature liquefaction and avoids the recess 301 being too large to affect the flow capacity of the adapter 30.
[0048] The insulating member is disposed on the large surface of the tab connection portion 31, and the insulating member is used to achieve insulation between the battery cell 200 and the adapter 30, and the insulating member at least partially covers the recessed portion 301. For example, the insulating member covers the first surface of the tab connection portion 31, or the insulating member covers a partial area of the first surface of the tab connection portion 31 and covers a portion of the recessed portion 301.
[0049] In the embodiment of the present disclosure, the insulating member may be an insulating coating, an insulating film, an insulating plate or an insulating tape, etc. The insulating member is applied to the surface of the adapter 30 by bonding or electrostatic sticking, or may be an insulating material sprayed on the surface of the adapter 30.
[0050] In the embodiment of the present disclosure, the insulating member is made of hot-melt material, for example, the insulating member can be a plastic insulating member, a rubber insulating member or a resin insulating member, etc. Or the insulating member includes at least part of the hot-melt material, for example, the insulating member can include an insulating layer and a connecting adhesive layer for bonding the insulating layer and the surface of the tab connection part 31, and the connecting adhesive layer is a hot-melt adhesive. Since the insulating layer has hot-melt properties, the recessed portion 301 is provided on the surface of the tab connection part 31 to accommodate the hot-melted insulating layer, thereby preventing the insulating layer from bonding to the battery cell 200.
[0051] When the pole assembly 20 includes a first pole and a second pole, a first adapter and a second adapter may be provided in the battery housing assembly 100, the first adapter is linked to the first pole, and the second adapter is connected to the second pole. For example, when the pole lug 210 of the battery cell 200 is sideways (two pole lugs 210 extend from both sides respectively), the first pole and the second pole are respectively arranged at both ends of the cover plate 11, and the pole connecting portion 32 of the first adapter is parallel to the cover plate 11 and connected to the first pole. The pole lug connecting portion 31 of the first adapter extends between the battery cell 200 and the side wall of the housing, and is connected to the first pole lug 210 of the battery cell 200. The pole lug connecting portion 32 of the second adapter is parallel to the cover plate 11 and is connected to the second pole. The pole lug connecting portion 31 of the second adapter extends between the battery cell 200 and the side wall of the housing, and is connected to the second pole.
[0052] The battery shell assembly 100 provided in the embodiment of the present disclosure includes a battery shell 10, a pole assembly 20 and an adapter 30. The pole assembly 20 is arranged in the battery shell 10. The adapter 30 includes a pole connecting portion 32 and a pole lug connecting portion 31. The pole connecting portion 32 is connected to the pole. The pole lug connecting portion 31 is used to connect the pole lug 210 of the battery cell 200. A recessed portion 301 is formed on the first surface of the pole lug connecting portion 31, and an insulating member is arranged on the first surface of the pole lug connecting portion 31. By providing the recessed portion 301 on the first surface of the pole lug connecting portion 31, the heat dissipation area of the pole lug connecting portion 31 is increased, and the heat can be quickly dissipated during welding, reducing the melting of the insulating member. The recessed portion 301 provides a accommodating space. After the insulating member melts, it flows to the accommodating space, thereby avoiding the melted insulating member and the battery cell 200 from adhering to each other, improving the convenience of disassembling the battery cell 200, and facilitating later maintenance.
[0053] The exemplary embodiment of the present disclosure also provides a battery, the battery includes a battery housing assembly 100 and a battery cell 200, the battery cell 200 includes a battery cell body and a tab 210 extending from the battery cell body, the tab 210 and the tab connection portion 31 are welded to form a welding area. The welding area and the recess 301 are respectively located on two large surfaces of the tab connection portion 31.
[0054] The battery provided by the embodiment of the present disclosure includes a battery shell assembly 100, in which the pole assembly 20 is arranged in the battery shell 10, and the adapter 30 includes a pole connecting part 32 and a pole lug connecting part 31, the pole connecting part 32 is connected to the pole, and the pole lug connecting part 31 is used to connect the pole lug 210 of the battery cell 200, a recessed part 301 is formed on the large surface of the pole lug connecting part 31, and an insulating part is arranged on the large surface of the pole lug connecting part 31, and the recessed part 301 is arranged on the large surface of the pole lug connecting part 31, so that the heat dissipation area of the pole lug connecting part 31 is increased, and the heat can be quickly dissipated during welding, reducing the melting of the insulating part, and the recessed part 301 provides a accommodating space, and the insulating part flows to the accommodating space after melting, thereby avoiding the melted insulating part and the battery cell 200 from adhering, improving the convenience of disassembling the battery cell 200, and facilitating later maintenance.
[0055] In a feasible embodiment of the present disclosure, the projection of the welding area on the large surface of the pole lug connection part 31 at least partially overlaps with the recessed part 301. The depth of the recessed part 301 is 0.05mm-0.5mm, and the depth of the recessed part 301 is the dimension of the recessed part 301 in the direction perpendicular to the large surface of the pole lug connection part 31. The welding heat is conducted fastest to the concave part corresponding to the welding area, causing the insulating part here to be most easily liquefied, so the recessed part 301 is at least partially arranged in the area corresponding to the welding area, which can ensure that the hot-melted insulating part can quickly flow to the recessed part 301 during welding, avoiding the overflow of the hot-melted insulating layer.
[0056] In another feasible embodiment of the present disclosure, the projection of the welding area on the large surface of the pole lug connection part 31 and the recessed part 301 do not have an overlapping area. The depth of the recessed part 301 is 0.01mm-0.49mm, and the depth of the recessed part 301 is the dimension of the recessed part 301 in the direction perpendicular to the large surface of the pole lug connection part. The temperature of the welding area is relatively high, and it is easy to receive deformation stress, thereby causing deformation. The recessed part 301 is set not to overlap with the welding area, which can ensure the strength of the welding area and prevent the adapter 30 from deforming.
[0057] The insulating member is disposed between the battery body and the tab connection portion 31, and the thickness of the insulating member is 0.02 mm-1 mm, and the thickness of the insulating member is the dimension of the insulating member in a direction perpendicular to the first surface of the tab connection portion 31. For example, the thickness of the insulating member can be 0.02 mm, 0.025 mm, 0.03 mm, 0.05 mm, 0.08 mm, 0.1 mm, 0.2 mm, 0.5 mm, 0.8 mm or 1 mm, etc.
[0058] The thickness of the insulating member is set to 0.02 mm-1 mm. On the one hand, the thickness of the insulating member is greater than or equal to 0.02 mm, which ensures that the insulating member can achieve insulation. On the other hand, it avoids the problem of occupying too much space due to the excessive thickness of the insulating member.
[0059] The ratio of the thickness of the insulating member to the depth of the recessed portion 301 is in the range of 0.2-10, and the depth of the recessed portion 301 is the dimension of the recessed portion 301 in the direction perpendicular to the first surface of the tab connecting portion 31. For example, the ratio of the thickness of the insulating member to the depth of the recessed portion 301 can be 0.2, 0.3, 0.4, 0.5, 0.7, 0.8, 0.9, 1, 2, 3, 5, 8, 9 or 10, etc.
[0060] By setting the ratio of the thickness of the insulating member and the depth of the recess 301 to 0.2-10, on the one hand, it is ensured that the recess 301 has a sufficient accommodating area to achieve the storage of the hot-melt insulating member by the recess 301 and prevent the hot-melt insulating member from overflowing. On the other hand, it can ensure the insulation of the insulating member and prevent the insulating member from being punctured, thereby improving the safety of the battery.
[0061] The battery cell 200 is arranged in the battery shell 10, and the battery cell 200 includes a battery cell body and a pole ear 210, and the pole ear 210 extends from the battery cell body; there are two pole ears 210 on the battery cell body, and the two pole ears 210 are respectively a first pole ear 210 (positive pole ear 210) and a second pole ear 210 (negative pole ear 210), and the first pole ear 210 and the second pole ear 210 can be respectively connected to the corresponding adapter 30.
[0062] It should be noted that the battery cell body may include more than two pole pieces, and the pole ear 210 includes more than two single-piece pole ears 210, and the single-piece pole ears 210 extend from the corresponding pole pieces respectively. The width of the single-piece pole ear 210 is smaller than the width of the pole piece, and multiple single-piece pole ears 210 are stacked to form a pole ear 210.
[0063] In one embodiment, the battery is a laminated battery, which is not only convenient to group, but also can be processed to obtain a longer battery. The battery cell 200 is a laminated battery cell, which has a first pole piece stacked on top of each other, a second pole piece with electrical properties opposite to the first pole piece, and a diaphragm sheet arranged between the first pole piece and the second pole piece, so that multiple pairs of first pole pieces and second pole pieces are stacked to form a laminated battery cell.
[0064] Optionally, the battery cell 200 may be a wound battery cell, that is, a first pole sheet, a second pole sheet having electrical properties opposite to the first pole sheet, and a diaphragm sheet disposed between the first pole sheet and the second pole sheet are wound to obtain the wound battery cell.
[0065] The battery provided by the embodiment of the present disclosure includes a battery shell assembly 100, in which the pole assembly 20 is arranged on the cover plate 11, and the adapter 30 includes a pole connecting part 32 and a pole lug connecting part 31, the pole connecting part 32 is connected to the pole, and the pole lug connecting part 31 is used to connect the pole lug 210 of the battery cell 200, a recessed part 301 is formed on the first surface of the pole lug connecting part 31, and an insulating part is arranged on the first surface of the pole lug connecting part 31, and the recessed part 301 is arranged on the first surface of the pole lug connecting part 31, so that the heat dissipation area of the pole lug connecting part 31 is increased, and the heat can be quickly dissipated during welding, reducing the melting of the insulating part, and the recessed part 301 provides a accommodating space, and the insulating part flows to the accommodating space after melting, thereby avoiding the melted insulating part and the battery cell 200 from adhering, improving the convenience of disassembling the battery cell 200, and facilitating later maintenance.
[0066] The battery provided by the embodiment of the present disclosure can be applied to electric vehicles. When the battery is used in an electric vehicle, the battery can be integrated into a battery pack, which is installed on the electric vehicle to provide energy to the electric vehicle. In practical applications, the battery pack can be installed on the frame of the electric vehicle. The battery pack can be fixedly connected to the frame. Or the battery pack can be a modular battery pack, which can be detachably connected to the vehicle body for easy replacement.
[0067] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.
Claims
1. A battery housing assembly, characterized in that: The battery housing assembly comprises: Battery housing; A pole assembly, the pole assembly being disposed on a first surface of the battery housing; An adapter, the adapter comprising a pole connecting portion and a pole lug connecting portion, the pole connecting portion being parallel to the first surface of the battery housing, the large surface of the pole lug connecting portion and the pole connecting portion having an angle of 85°-105°, the pole connecting portion being used to electrically connect the pole assembly, the pole lug connecting portion being used to electrically connect the pole lug, and the large surface of the pole lug connecting portion being formed with a recessed portion; An insulating member is arranged and fixed on the large surface of the pole tab connecting portion, and the insulating member at least partially covers the recessed portion.
2. The battery housing assembly according to claim 1, characterized in that: The depth of the recessed portion is 0.01 mm-0.5 mm, and the depth of the recessed portion is a dimension of the recessed portion in a direction perpendicular to the first surface.
3. The battery housing assembly according to claim 1, characterized in that: The tab connection portion is provided with a plurality of recessed portions, and the spacing between two adjacent recessed portions is 0.03 mm-0.15 mm.
4. The battery housing assembly according to claim 1, wherein: The cross-sectional area of the recessed portion decreases in a direction away from the insulating member, and the cross-sectional area is a cross-sectional area parallel to the first surface of the pole tab connecting portion.
5. The battery housing assembly according to any one of claims 1 to 4, characterized in that: The recessed portion includes at least one first groove and at least one second groove, the first groove and the second groove are connected to each other, and an extension direction of the first groove is perpendicular to an extension direction of the second groove.
6. A battery, characterized in that: The battery comprises: The battery housing assembly according to any one of claims 1 to 5; A battery cell comprises a battery cell body and a tab extending from the battery cell body, wherein the tab and the tab connecting portion are welded to form a welding area, and the welding area and the recessed portion are respectively located on two large surfaces of the tab connecting portion.
7. The battery according to claim 6, characterized in that The projection of the welding area on the large surface of the pole lug connecting portion at least partially overlaps with the recessed portion, the depth of the recessed portion is 0.05mm-0.5mm, and the depth of the recessed portion is the dimension of the recessed portion in a direction perpendicular to the large surface of the pole lug connecting portion.
8. The battery according to claim 6, characterized in that The projection of the welding area on the large surface of the pole lug connecting portion and the recessed portion have no overlapping area, the depth of the recessed portion is 0.01mm-0.49mm, and the depth of the recessed portion is the dimension of the recessed portion in a direction perpendicular to the large surface of the pole lug connecting portion.
9. The battery according to claim 6, characterized in that The insulating member is disposed between the battery cell body and the tab connection portion, and the thickness of the insulating member is 0.02 mm-1 mm. The thickness of the insulating member is the dimension of the insulating member in a direction perpendicular to the large surface of the tab connection portion.
10. The battery according to claim 6, characterized in that The ratio of the thickness of the insulating member to the depth of the recessed portion is in the range of 0.2-10, the depth of the recessed portion is the dimension of the recessed portion in a direction perpendicular to the large surface of the pole lug connecting portion, and the thickness of the insulating member is the dimension of the insulating member in a direction perpendicular to the large surface of the pole lug connecting portion.