Battery cover plate assembly and battery

Abstract

The utility model relates to the technical field of batteries, and particularly discloses a battery cover plate assembly and a battery, the battery cover plate assembly comprises a cover plate body, a plastic part and a clamping part, the plastic part is provided with a first plastic part and a second plastic part, the first plastic part is connected above the cover plate body, the second plastic part is connected below the cover plate body, the first plastic part is provided with a containing groove, and the clamping part is provided with a clamping groove. The cover plate body, the first plastic part and the second plastic part jointly form a via hole allowing the electrode tab to penetrate through, the second plastic part is provided with a shaping inclined wall, the shaping inclined wall is used for shaping the electrode tab and guiding the electrode tab into the via hole, it is guaranteed that bending and the moving direction of the electrode tab are controlled, and short circuit caused by contact with a shell is avoided. The clamping piece is provided with a pressing part and two clamping parts, the pressing part can be attached to the connecting piece, and the clamping parts can abut against the bottom of the second plastic piece so that the connecting piece can be clamped in the containing groove, and therefore the connecting piece does not need to occupy the internal space of the battery.

Description

Technical Field

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

[0002] The battery cover assembly is an essential component of the battery. The ends of the electrode tabs are electrically connected to the battery cell and the battery cover assembly's connecting tabs, which further connect to the corresponding poles to enable charging and discharging. Existing battery cover assemblies cannot constrain the bending and orientation of the tabs, making them susceptible to short circuits with the battery casing. Furthermore, components such as the connecting tabs are located inside the battery, resulting in the battery cover assembly occupying a large amount of internal space, which is not conducive to the utilization of the battery's internal space. Utility Model Content

[0003] The purpose of the utility model is to provide a battery cover assembly and a battery, so as to solve the problems of the existing battery cover assembly in that the tabs are easily short-circuited with the battery shell and occupy a large amount of internal space of the battery.

[0004] The utility model provides a battery cover assembly, including a cover body, a plastic part and a clamping part, the cover body is provided with an electrode groove, the plastic part is provided with a first plastic part and a second plastic part, the first plastic part is connected above the cover body and is located in the electrode groove, the second plastic part is connected below the cover body, the first plastic part has a receiving groove, the receiving groove is used to receive a connecting piece, the cover body, the first plastic part and the second plastic part jointly form a through hole for the electrode tab to pass through, the two ends of the electrode tab are electrically connected to the battery core and the connecting piece respectively, the second plastic part is provided with a shaping oblique wall, the shaping oblique wall is used to shape the electrode tab and introduce it into the through hole, the clamping part is provided with a crimping part and two clamping parts, the crimping part can be fitted with the connecting piece, and the clamping part can be pressed against the bottom of the second plastic part to clamp the connecting piece in the receiving groove.

[0005] As an optimal technical solution for the battery cover assembly, two oppositely arranged first through holes are provided at the bottom of the electrode slot, two second through holes are correspondingly provided on the first plastic part, and the second through holes can be aligned and connected with the first through holes, and two third through holes are correspondingly provided on the second plastic part, and the third through holes can be aligned and connected with the first through holes. The first through hole, the second through hole and the third through hole together form a through hole, and bending parts are provided at both ends of the crimping part, and the two clamping parts are connected to the clamping part through the two bending parts, and the bending part passes through the through hole.

[0006] As a preferred technical solution for the battery cover assembly, a plurality of clamping members are provided, and the plurality of clamping members are spaced apart and distributed along the length direction of the through hole.

[0007] As an optimal technical solution for the battery cover assembly, the bottom of the second plastic part is provided with a first wall and a second wall distributed in a stepped manner. The second wall is located in the direction away from the cover body of the first wall, the clamping portion is pressed against the first wall, the third through hole is provided on the first wall, and the first wall and the second wall are connected by a shaped inclined wall.

[0008] As a preferred technical solution for the battery cover assembly, the clamping member is made of epoxy resin, metal or plastic.

[0009] As a preferred technical solution for the battery cover assembly, the thickness of the clamping member is 0.1-2 mm.

[0010] As the preferred technical solution for the battery cover assembly, the first plastic part includes a fixedly connected support plate and a frame. The support plate is located in the electrode groove, and the frame is located above the support plate. The frame and the support plate together form a receiving groove, and the distance between the outer edge of the frame and the outer edge of the support plate is 1-10 mm.

[0011] As a preferred technical solution for the battery cover assembly, the distance between the bottom surface of the accommodating groove and the surface of the cover body on the side away from the second plastic part is less than or equal to 0.5 times the thickness of the cover body.

[0012] As a preferred technical solution for the battery cover assembly, two electrode slots are provided, the number of the first plastic parts is two, and the two first plastic parts are respectively located in the two electrode slots.

[0013] The utility model provides a battery, comprising a battery cover assembly of any one of the above solutions.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a battery cover assembly, which shapes the electrode tab by arranging a shaping inclined wall on the second plastic part and guides it into the through hole, thereby ensuring that the bending and direction of the electrode tab are controlled to avoid contact with the shell and causing a short circuit. In addition, a receiving groove is provided in the first plastic part to accommodate the connecting piece, and the connecting piece is clamped in the receiving groove by a clamping piece, so that the connecting piece does not need to occupy the internal space of the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of the battery cover assembly from a first perspective in an embodiment of the present invention;

[0017] Figure 2 This is an exploded view of the battery cover assembly from a first perspective in an embodiment of the present invention;

[0018] Figure 3 This is a structural diagram of the battery cover assembly from a second perspective in an embodiment of the present utility model;

[0019] Figure 4This is an exploded view of the battery cover assembly from a second perspective in an embodiment of the present invention;

[0020] Figure 5 This is a front view of the battery cover assembly in an embodiment of the present utility model;

[0021] Figure 6 for Figure 5 Cross-sectional view along AA direction;

[0022] Figure 7 for Figure 6 A partial enlarged view of part C in the middle;

[0023] Figure 8 for Figure 5 Cross-sectional view along BB direction;

[0024] Figure 9 for Figure 8 A partial enlarged view of part D in the middle;

[0025] Figure 10 This is a structural diagram of the cover body in an embodiment of the present utility model;

[0026] Figure 11 This is a structural diagram of the first plastic part in an embodiment of the present utility model;

[0027] Figure 12 This is a schematic structural diagram of the second plastic part in an embodiment of the present utility model;

[0028] Figure 13 Schematic diagram of the structure of the clamping member in the embodiment of the present utility model.

[0029] In the picture:

[0030] 1. Cover plate body; 11. Electrode slot; 12. First via hole; 13. Mounting slot; 14. Liquid injection hole;

[0031] 2. Plastic part; 21. First plastic part; 211. Support plate; 212. Frame; 213. Second through hole; 214. Accommodation groove; 22. Second plastic part; 221. Third through hole; 222. First wall; 223. Second wall; 224. Shaped inclined wall;

[0032] 3. Clamping member; 31. Crimping portion; 32. Bending portion; 33. Clamping portion;

[0033] 4. Connecting piece; 5. Explosion-proof valve. DETAILED DESCRIPTION

[0034] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific position, be constructed and operated in a specific position, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0036] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0037] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0038] like Figures 1-13As shown, the present invention provides a battery cover assembly, including a cover body 1, a plastic part 2, and a clamping part 3. The cover body 1 is provided with an electrode slot 11, the position of the electrode slot 11 corresponding to the positive and / or negative pole of the battery. When the number of electrode slots 11 is set to one, the position of the electrode slot 11 corresponds to the positive or negative pole of the battery; when the number of electrode slots 11 is set to two, the positions of the two electrode slots 11 correspond to the positive and negative poles of the battery, respectively. In this embodiment, the number of electrode slots 11 is set to two, and the positions of the two electrode slots 11 correspond to the positive and negative poles of the battery, respectively, to improve the degree of integration. The plastic part 2 is provided with a first plastic part 21 and a second plastic part 22. The first plastic part 21 and the second plastic part 22 can be formed by integral injection molding or manufactured separately and then connected by fasteners. The first plastic part 21 is connected to the upper part of the cover body 1 and is located in the electrode slot 11. The second plastic part 22 is connected to the lower part of the cover body 1. The first plastic part 21 has a receiving groove 214 for accommodating a connecting piece 4, which is used to electrically connect to the positive or negative electrode. In this embodiment, two first plastic parts 21 are provided, and the two first plastic parts 21 are respectively located in the two electrode grooves 11. The cover body 1, the first plastic part 21, and the second plastic part 22 collectively form a through-hole for the electrode tab to pass through. The ends of the electrode tab are respectively electrically connected to the battery cell and the connecting piece 4. The second plastic part 22 is provided with a shaping slanted wall 224. The shaping slanted wall 224 is used to shape the electrode tab and guide it into the through-hole. Specifically, one end of the electrode tab is electrically connected to the battery cell, while the other end is guided into the through-hole by the shaping slanted wall 224 to control its bending and direction. After passing through the through-hole, the electrode tab passes through the second plastic part 22, the cover body 1, and the first plastic part 21 from bottom to top, and then electrically connects to the connecting piece 4 located in the receiving groove 214 of the first plastic part 21. The specific connection method is not limited here. The clamping member 3 is provided with a crimping portion 31 and two clamping portions 33. The crimping portion 31 can be fitted with the connecting piece 4, and the clamping portion 33 can be pressed against the bottom of the second plastic part 22 to clamp the connecting piece 4 in the receiving groove 214. In the battery cover assembly of this embodiment, the electrode tab is shaped and introduced into the via by providing a shaping inclined wall 224 on the second plastic part 22, thereby ensuring that the bending and direction of the electrode tab are controlled to avoid contact with the shell and causing a short circuit. In addition, by providing a receiving groove 214 to accommodate the connecting piece 4 in the first plastic part 21, and clamping the connecting piece 4 in the receiving groove 214 by the clamping member 3, the connecting piece 4 does not need to occupy the internal space of the battery.

[0039] Furthermore, if Figure 10-13 As shown, combined with Figure 8-Figure 9 , two first via holes 12 are provided at the bottom of the electrode groove 11, as shown in FIG. Figure 10 Two second through holes 213 are correspondingly provided on the first plastic part 21. Figure 11The second through hole 213 can be aligned and connected with the first through hole 12. Two third through holes 221 are correspondingly provided on the second plastic part 22. Figure 12 The third through hole 221 can be aligned and connected with the first through hole 12. The first through hole 12, the second through hole 213 and the third through hole 221 together form a through hole for the clamping member 3 to pass through. Figure 13 The clamping member 3 further includes a bent portion 32. The crimping portion 31, the bent portion 32, and the clamping portion 33 are integrally formed. A bent portion 32 is provided at both ends of the crimping portion 31. The bent portions 32 are arranged perpendicular to the crimping portion 31. The two bent portions 32 are bent in the same direction relative to the crimping portion 31. The two clamping portions 33 are connected to the clamping portion 33 via the two bent portions 32. The clamping portion 33 is connected to one end of the bent portion 32 and is perpendicular to the bent portion 32. The two clamping portions 33 are arranged opposite each other. The bent portion 32 passes through the through hole, so that the clamping portion 33 is pressed against the bottom of the second plastic part 22. Specifically, the distance between the two bent portions 32 is equal to the distance between the inner side walls of the two through holes, thereby ensuring that the two clamping portions 33 can reliably press against the bottom of the second plastic part 22. When installing the clamping member 3, the two bent portions 32 are opened and elastically deformed in a direction away from the other, so that the two clamping portions 33 can pass through the two through holes respectively. After the two clamping portions 33 pass through the two through holes, the external force is removed so that the two bent portions 32 are reset under the elastic force. During this process, the two clamping portions 33 gradually adhere to and press against the bottom of the second plastic part 22, so that the connecting piece 4 can be reliably clamped in the accommodating groove 214.

[0040] For details, please refer to Figure 1-Figure 4 As shown, to further enhance the clamping effect, multiple clamping members 3 are provided, and the multiple clamping members 3 are spaced apart along the length of the through-hole. In this embodiment, two clamping members 3 are preferably provided, and the two clamping members 3 are spaced apart along the length of the through-hole, so as to avoid occupying too much installation space and thus affecting the layout of other components while ensuring the clamping effect. The cover body 1 in this embodiment is provided with two electrode grooves 11, and each corresponding electrode groove 11 is provided with a connecting piece 4. Each corresponding connecting piece 4 is clamped in the corresponding receiving groove 214 by two clamping members 3.

[0041] Optionally, the clamping member 3 in this embodiment can be made of epoxy resin, metal, or plastic. For example, the metal member can be made of iron and its alloys, aluminum alloys, or copper alloys. For example, the plastic member can be made of PP, PE, or PET. The members made of the above materials all have a certain elastic deformation capacity and high structural strength and mechanical properties, which can meet the requirements of clamping the connecting piece 4 in the receiving groove 214. At the same time, the thickness of the clamping member 3 can be 0.1-2 mm, for example, 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, or 2 mm. The clamping member 3 can be set as a member of uniform thickness or a member of unequal thickness. When the clamping member 3 is set as a member of unequal thickness, its thickness change can be a uniform increase or decrease, or a local thickness increase, which is not specifically limited in this embodiment.

[0042] For further information, please refer to Figure 3-Figure 4 , and combined with Figure 8-Figure 9 As shown, the bottom of the second plastic part 22 is provided with a first wall 222 and a second wall 223 arranged in a stepped manner. The first wall 222 and the second wall 223 are arranged parallel to each other, and the second wall 223 is located in the direction away from the first wall 222 and the cover body 1. The clamping portion 33 passes through the through hole and abuts against the first wall 222. The third via 221 is provided on the first wall 222. The first wall 222 and the second wall 223 are connected by a shaped inclined wall 224. This controls the bending and direction of the electrode tab, realizes the shaping of the electrode tab, and avoids the problem of contact with the housing and causing a short circuit.

[0043] Furthermore, if Figures 6-11 As shown, the first plastic part 21 includes a support plate 211 and a frame 212 that are fixedly connected. The support plate 211 and the frame 212 can be connected by fasteners or formed as one piece. In this embodiment, the support plate 211 and the frame 212 are preferably formed as one piece. The support plate 211 is located in the electrode groove 11, and the frame 212 is located above the support plate 211. The frame 212 and the support plate 211 together form a receiving groove 214 and a second through hole 213. To facilitate installation, the size of the electrode groove 11 is larger than that of the support plate 211. The size of the frame 212 is set based on the premise that it can accommodate the connecting piece 4 and meet the mechanical and electrical properties. That is, the size of the frame 212 is determined. In order to facilitate lightweighting while meeting the installation requirements of the first plastic part 21, the geometric centers of the support plate 211 and the frame 212 are set to coincide, and the outer edge of the support plate 211 is located outside the outer edge of the frame 212. Correspondingly, as Figure 7As shown, assuming that the distance between the outer edge of the frame 212 and the outer edge of the support plate 211 is L, then L is 1-10 mm, for example, 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm. Under the premise of facilitating installation, the support plate 211 should be prevented from being too large and causing an increase in weight.

[0044] Alternatively, see Figure 7-Figure 8 As shown, assuming that the distance between the bottom surface of the receiving groove 214 and the surface of the battery cover plate 1 on the side away from the lower plastic part 22 is H, and the thickness of the battery cover plate 1 is T, then H≤0.5T, that is, the distance between the bottom surface of the receiving groove 214 and the upper end surface of the battery cover plate 1 is less than or equal to 0.5 times the thickness of the battery cover plate 1. For example, the distance between the bottom surface of the electrode groove 11 and the surface of the battery cover plate 1 on the side away from the lower plastic part 22 can be 0.5, 0.4, 0.3, 0.2, or 0.1 times the thickness of the battery cover plate 1. Under the premise of meeting the strength requirements of the cover plate body 1, the space utilization rate is further improved.

[0045] Alternatively, see Figures 1-10 As shown, the cover body 1 can also be provided with a mounting groove 13 for mounting the explosion-proof valve 5 as required, and a liquid injection hole 14 as required. The structures of the explosion-proof valve 5 and the liquid injection hole 14 can be selected from existing structural designs in the art, so they will not be described in detail here.

[0046] Compared to existing structures, the battery cover assembly provided in this embodiment solves the problem of uncontrolled bending and orientation of the electrode tab, which can lead to short circuits with the battery casing. Furthermore, by providing a clamping member 3 to clamp the connecting piece 4 within the receiving groove 214 of the first plastic part 21 located above the cover body 1, the internal space occupied by the battery is effectively reduced.

[0047] The present application also provides a battery, including the battery cover assembly in this embodiment. By setting the battery cover assembly in this embodiment, the internal space utilization rate of the battery is higher and the failure rate is lower.

[0048] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Battery cover assembly, characterized in that: include: A cover plate body (1), wherein the cover plate body (1) is provided with an electrode groove (11); A plastic part (2), the plastic part (2) being provided with a first plastic part (21) and a second plastic part (22), the first plastic part (21) being connected above the cover plate body (1) and being located in the electrode groove (11), the second plastic part (22) being connected below the cover plate body (1), the first plastic part (21) having a receiving groove (214), the receiving groove (214) being used to receive the connecting piece (4); The cover plate body (1), the first plastic part (21) and the second plastic part (22) are jointly formed with a through hole for the electrode tab to pass through, the two ends of the electrode tab are electrically connected to the battery cell and the connecting piece (4) respectively, and the second plastic part (22) is provided with a shaping inclined wall (224), and the shaping inclined wall (224) is used to shape the electrode tab and guide it into the through hole; A clamping member (3), wherein the clamping member (3) is provided with a crimping portion (31) and two clamping portions (33), wherein the crimping portion (31) can be fitted with the connecting piece (4), and the clamping portion (33) can be pressed against the bottom of the second plastic part (22) to clamp the connecting piece (4) in the accommodating groove (214).

2. The battery cover assembly according to claim 1, characterized in that: Two first through holes (12) arranged opposite to each other are provided at the bottom of the electrode groove (11); the first plastic part (21) is correspondingly provided with two second through holes (213); the second through holes (213) can be aligned and connected with the first through hole (12); the second plastic part (22) is correspondingly provided with two third through holes (221); the third through holes (221) can be aligned and connected with the first through hole (12); the first through hole (12), the second through hole (213) and the third through hole (221) together form the through hole; both ends of the crimping part (31) are provided with a bending part (32); the two clamping parts (33) are connected to the clamping part (33) through the two bending parts (32); the bending part (32) passes through the through hole.

3. The battery cover assembly according to claim 2, characterized in that: A plurality of the clamping members (3) are provided, and the plurality of the clamping members (3) are distributed at intervals along the length direction of the through hole.

4. The battery cover assembly according to claim 2, characterized in that: The bottom of the second plastic part (22) is provided with a first wall (222) and a second wall (223) distributed in a stepped manner, the second wall (223) is located in a direction away from the first wall (222) and the cover body (1), the clamping portion (33) is pressed against the first wall (222), the third through hole (221) is provided on the first wall (222), and the first wall (222) and the second wall (223) are connected by the shaped inclined wall (224).

5. The battery cover assembly according to claim 1, characterized in that: The clamping part (3) is made of epoxy resin, metal or plastic.

6. The battery cover assembly according to claim 1, characterized in that: The thickness of the clamping member (3) is 0.1-2 mm.

7. The battery cover assembly according to claim 1, characterized in that: The first plastic part (21) comprises a fixedly connected support plate (211) and a frame (212); the support plate (211) is located in the electrode groove (11); the frame (212) is located above the support plate (211); the frame (212) and the support plate (211) together form the accommodating groove (214); and the distance between the outer edge of the frame (212) and the outer edge of the support plate (211) is 1-10 mm.

8. The battery cover assembly according to claim 1, characterized in that: The distance between the bottom surface of the accommodating groove (214) and the surface of the cover body (1) on the side away from the second plastic part (22) is less than or equal to 0.5 times the thickness of the cover body (1).

9. The battery cover assembly according to any one of claims 1 to 8, characterized in that: The electrode slots (11) are provided in two numbers, the number of the first plastic parts (21) is two, and the two first plastic parts (21) are respectively located in the two electrode slots (11).

10. A battery, characterized in that A battery cover assembly comprising the battery cover assembly according to any one of claims 1 to 9.

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