Cover plate assembly and battery

Abstract

The utility model relates to the technical field of batteries, in particular to a cover plate component and a battery, the cover plate component comprises a battery cover plate, a plastic component and a bandage, the plastic component is provided with a first plastic part and a second plastic part, the first plastic part is connected above the battery cover plate, the second plastic part is connected below the battery cover plate, the first plastic part is provided with a containing groove, and the bandage is arranged in the containing groove. The accommodating groove is used for accommodating the connecting piece, the battery cover plate, the first plastic part and the second plastic part jointly form a via hole for allowing the electrode tab to pass through, the second plastic part is provided with a shaping inclined wall, and the shaping inclined wall is used for shaping the electrode tab and guiding the electrode tab into the via hole, so that the bending and trend of the electrode tab are controlled, and short circuit caused by contact with the shell is avoided. The binding band is wound outside the plastic component, at least part of the binding band abuts against the connecting piece, and the binding band is used for fixing the connecting piece in the containing groove, so that the connecting piece does not need to occupy the internal space of the battery.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field especially relates to a cover plate subassembly and battery. BACKGROUND

[0002] The battery cover plate subassembly is the necessary part of the battery, and the electrode tab is electrically connected with the connecting piece of the battery cover plate subassembly and the battery cell at both ends respectively, and is further connected with the corresponding pole to realize the charge and discharge. The battery cover plate subassembly in the prior art cannot constrain the bending and trend of the electrode tab, which leads to the short circuit of the electrode tab and the battery shell, and the connecting piece and other parts are located in the battery, so that the battery cover plate subassembly occupies a large internal space of the battery, which is not conducive to the utilization of the internal space of the battery. SUMMARY

[0003] The utility model discloses a cover plate subassembly and battery, to solve the problem of the short circuit of the electrode tab and the battery shell and the large occupation of the internal space of the battery existing in the prior art.

[0004] The utility model provides a cover plate subassembly, including battery cover plate, plastic component and bandage, battery cover plate is equipped with electrode slot, plastic component sets up first plastic piece and second plastic piece, first plastic piece is connected in the top of battery cover plate and is located in electrode slot, second plastic piece is connected in the bottom of battery cover plate, first plastic piece has the accommodation groove, and the accommodation groove is used to accommodate the connecting piece, battery cover plate, first plastic piece and second plastic piece form the via hole in common for the electrode tab passes through, and the both ends of electrode tab are electrically connected with the connecting piece and the battery cell respectively, second plastic piece is provided with the shaping inclined wall, and the shaping inclined wall is used for shaping electrode tab and imports to the via hole, and the bandage is around the outside of plastic component, and at least part of bandage is tightly contacted with the connecting piece, and the bandage is used for fixing the connecting piece in the accommodation groove.

[0005] As the preferred technical scheme of the cover plate subassembly, the bandage is set as adhesive tape, and the adhesive tape is bonded to the connecting piece and the outside of the plastic component. The adhesive tape is set as multiple layers.

[0006] As the preferred technical scheme of the cover plate subassembly, the thickness of each layer of adhesive tape is 25-150 microns.

[0007] As the preferred technical scheme of the cover plate subassembly, the adhesive tape is PEI adhesive tape, PI adhesive tape, PP adhesive tape, PE adhesive tape or PET adhesive tape.

[0008] As the preferred technical scheme of the cover plate subassembly, the bandage is set as multiple, and the multiple bandages are arranged along the length direction of the connecting piece.

[0009] As the preferred technical scheme of the cover plate assembly, two first through holes are arranged at the bottom of the electrode groove in opposite positions, two second through holes are arranged on the first plastic part in corresponding positions, the second through holes can be aligned and communicated with the first through holes, two third through holes are arranged on the second plastic part in corresponding positions, the third through holes can be aligned and communicated with the first through holes, the two first through holes, the two second through holes and the two third through holes jointly form two through holes arranged in opposite positions, and the binding belt is wound through the two through holes.

[0010] The bottom of the second plastic part is provided with a first wall and a second wall arranged in steps, the second wall is located in a direction away from the battery cover plate relative to the first wall, and the third through hole is arranged on the first wall, and the first wall and the second wall are connected by a shaping inclined wall.

[0011] As the preferred technical scheme of the cover plate assembly, the first plastic part comprises a support plate and a frame which are fixedly connected, the support plate is located in the electrode groove, the frame is located above the support plate, and the frame and the support plate jointly form a containing groove, and the distance between the outer edge of the frame and the outer edge of the support plate is 1-10mm.

[0012] As the preferred technical scheme of the cover plate assembly, the distance between the bottom surface of the containing groove and the surface of the side of the battery cover plate away from the second plastic part is less than or equal to 0.5 times the thickness of the battery cover plate.

[0013] As the preferred technical scheme of the cover plate assembly, the battery cover plate is further provided with a mounting groove for mounting the explosion-proof valve.

[0014] The utility model provides a kind of battery, including the cover plate assembly of any scheme above.

[0015] The utility model has the beneficial effects that:

[0016] The utility model provides a kind of cover plate assembly, by setting shaping inclined wall in second plastic part, electrode lug is shaped and introduced to through hole, guarantee the bending and trend of electrode lug are controlled, avoid short circuit caused by contact with shell, in addition, by setting containing groove in first plastic part and containing connecting piece, and connecting piece is fixed in containing groove by binding belt, so that connecting piece does not need to occupy the internal space of battery. DRAWINGS

[0017] Figure 1 It is the structure schematic view of the cover plate assembly of the first perspective of the embodiment of the utility model;

[0018] Figure 2 It is the explosion view of the cover plate assembly of the first perspective of the embodiment of the utility model;

[0019] Figure 3 It is the structure schematic view of the cover plate assembly of the second perspective of the embodiment of the utility model;

[0020] Figure 4It is the exploded view of the second visual angle of the cover plate assembly in the embodiment of the utility model;

[0021] Figure 5 It is the front view of the cover plate assembly in the embodiment of the utility model;

[0022] Figure 6 It is Figure 5 It is the sectional view along A-A direction;

[0023] Figure 7 It is Figure 6 It is the local enlarged view of C part;

[0024] Figure 8 It is Figure 5 It is the sectional view along B-B direction;

[0025] Figure 9 It is Figure 8 It is the local enlarged view of D part;

[0026] Figure 10 It is the structural schematic view of the battery cover plate in the embodiment of the utility model;

[0027] Figure 11 It is the structural schematic view of the first plastic part in the embodiment of the utility model;

[0028] Figure 12 It is the structural schematic view of the second plastic part in the embodiment of the utility model.

[0029] In the drawing,

[0030] 1, battery cover plate; 11, electrode slot; 12, first through hole; 13, installation slot; 14, liquid injection hole;

[0031] 2, plastic assembly; 21, first plastic part; 211, support plate; 212, frame; 213, second through hole; 214, containing groove; 22, second plastic part; 221, third through hole; 222, first wall; 223, second wall; 224, shaping inclined wall;

[0032] 3, bandage; 4, connecting sheet; 5, explosion-proof valve. DETAILED DESCRIPTION

[0033] The technical scheme of the utility model will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0034] In the description of the utility model, it is necessary to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicate or imply that the device or element indicated must have a particular orientation, a particular orientation and operation, therefore, cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", are only for the purpose of description, and cannot 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 is "above", "above" and "above" of the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature is "below", "below" and "below" of the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0035] In the description of the utility model, it is necessary to explain, unless otherwise specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, it can be the communication between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0036] The embodiments of the utility model are described in detail below, the examples of the embodiments are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as a limitation on the utility model.

[0037] As Figures 1-12As shown, the present invention provides a cover assembly, including a battery cover 1, a plastic component 2, and a strap 3. The battery cover 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 component 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 battery cover 1 and is located in the electrode slot 11, and the second plastic part 22 is connected to the lower part of the battery cover 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 battery cover 1, the first plastic part 21, and the second plastic part 22 collectively form a via 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 via. Specifically, one end of the electrode tab is electrically connected to the battery cell, while the other end is controlled by the shaping slanted wall 224 to be bent and directed into the via. After passing through the via, the electrode tab passes through the second plastic part 22, the battery cover 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 strap 3 is wound around the outside of the battery cover 1 and the plastic assembly 2, and at least a portion of the strap 3 abuts against the connecting piece 4. The strap 3 is used to fix the connecting piece 4 in the receiving groove 214. Specifically, the strap 3 fixes the connecting piece 4 in the receiving groove 214 by bundling or tightening. In the 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 on the first plastic part 21 to accommodate the connecting piece 4, and fixing the connecting piece 4 in the receiving groove 214 by the strap 3, the connecting piece 4 does not need to occupy the internal space of the battery.

[0038] Furthermore, if Figures 10-12 As shown, combined with Figures 8-9 , two first through 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 11, the second through hole 213 can be aligned and communicated with the first through hole 12. Two third through holes 221 are correspondingly arranged on the second plastic part 22, and the third through holes 221 can be aligned and communicated with the first through hole 12. Figure 12 The first through hole 12, the second through hole 213 and the third through hole 221 jointly form a through hole for the band 3 to pass through. The two first through holes 12, the two second through holes 213 and the two third through holes 221 jointly form two oppositely arranged through holes, and the band 3 passes through the two through holes to be arranged. The band 3 in the embodiment can be arranged as a tape or an elastic band. When the band 3 is arranged as a tape, the tape passes through one of the through holes and is bonded to the inner side wall of the through hole, then is selectively bonded to one of the bottom of the second plastic part 22 and the connecting piece 4 according to different arrangement directions, passes through the other through hole and is bonded to the inner side wall of the other through hole, and then is bonded to the other of the bottom of the second plastic part 22 and the connecting piece 4, so as to realize the binding of the connecting piece 4 and fix the connecting piece 4 in the accommodating groove 214. When the band 3 is arranged as an elastic band, the elastic band is pulled with a certain pre-tightening force, so that the elastic band passes through one of the through holes and abuts against the inner side wall of the through hole, then abuts against one of the bottom of the second plastic part 22 and the connecting piece 4 according to different arrangement directions, passes through the other through hole and abuts against the inner side wall of the other through hole, then abuts against the other of the bottom of the second plastic part 22 and the connecting piece 4, and the two ends of the elastic band are tied, so as to fix the connecting piece 4 in the accommodating groove 214.

[0039] Specifically, please refer to Figures 1-4 To further fix the connecting piece 4 in the accommodating groove 214, the band 3 is arranged in plurality, and the plurality of bands 3 are distributed along the length direction of the through hole. In the embodiment, the band 3 is preferably arranged in two, and the two bands 3 are distributed along the length direction of the through hole, which avoids occupying too much installation space and affecting the arrangement of other parts on the premise of ensuring the fixing effect. The battery cover plate 1 in the embodiment is provided with two electrode grooves 11, and each electrode groove 11 is provided with a connecting piece 4, and each connecting piece 4 is fixed in the corresponding accommodating groove 214 by the two bands 3.

[0040] In the embodiment, the binding tape 3 is preferably adhesive tape, which is attached to the outside of the connecting sheet 4 and the plastic assembly 2, and is provided in multiple layers. The multiple layers of the adhesive tape are wound around the connecting sheet 4 in a continuous layering manner, and the reliability of the binding of the connecting sheet 4 is increased by providing the adhesive tape in multiple layers. The thickness of each layer of the adhesive tape is 25-150 μm, such as 25 μm, 30 μm, 35 μm, 40 μm, 45 μm, 50 μm, 55 μm, 60 μm, 65 μm, 70 μm, 75 μm, 80 μm, 85 μm, 90 μm, 95 μm, 100 μm, 105 μm, 110 μm, 115 μm, 120 μm, 125 μm, 130 μm, 135 μm, 140 μm, 145 μm, or 150 μm. The number of layers of the adhesive tape is determined according to the thickness of each layer of the adhesive tape and the actual engineering requirements, and is not specifically limited herein. The adhesive tape in the embodiment can be PEI tape, PI tape, PP tape, PE tape, or PET tape. In the embodiment, the adhesive tape is preferably PET tape, which has good dimensional stability, thermal stability, and chemical stability, good initial adhesion and holding adhesion, and good adhesion to plastic parts, and thus the use of the PET tape for binding can further increase the reliability.

[0041] Further, referring to Figures 3-4 , in combination with Figures 8-9 , the bottom of the second plastic part 22 is provided with a first wall 222 and a second wall 223 distributed in steps, the first wall 222 and the second wall 223 are arranged in parallel, and the second wall 223 is located in the direction away from the battery cover plate 1. The third through hole 221 is arranged on the first wall 222, and the first wall 222 and the second wall 223 are connected by a shaped inclined wall 224, so as to control the bending and direction of the electrode tab, realize the shaping of the electrode tab, and avoid the problem of short circuit caused by contact with the shell.

[0042] Further, as shown in Figures 6-11As shown, the first plastic part 21 comprises a fixedly connected support plate 211 and a frame 212, which can be connected by fasteners or integrally formed. In this embodiment, the support plate 211 and the frame 212 are preferably integrally formed. The support plate 211 is located in the electrode slot 11, and the frame 212 is located above the support plate 211. The frame 212 and the support plate 211 jointly form a containing groove 214 and a second through hole 213. In order to facilitate installation, the size of the electrode slot 11 is larger than the size of the support plate 211, and the size of the frame 212 is set in a manner that can accommodate the connecting piece 4 and meet the mechanical and electrical performance, i.e., the size of the frame 212 is determined in a manner that facilitates lightweight while meeting the installation of the first plastic part 21. The geometric centers of the support plate 211 and the frame 212 are coincident, and the outer edge of the support plate 211 is located outside the outer edge of the frame 212. Correspondingly, as shown in Figure 7 As shown, the distance between the outer edge of the frame 212 and the outer edge of the support plate 211 is L, which is 1-10 mm, such as 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 size of the support plate 211 is prevented from being too large to increase the weight.

[0043] Alternatively, please refer to Figures 7-8 As shown, the distance between the bottom surface of the containing groove 214 and the surface of the side of the battery cover plate 1 away from the lower plastic part 22 is H, and the thickness of the battery cover plate 1 is T. Therefore, H≤0.5T, i.e., the distance between the bottom surface of the containing 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, such as 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 requirement of the battery cover plate 1, the space utilization is further improved.

[0044] Alternatively, please refer to Figures 1-10 As shown, the installation groove 13 for installing the explosion-proof valve 5 can also be provided on the battery cover plate 1 according to requirements, and the liquid injection hole 14 can also be provided according to requirements. The structures of the explosion-proof valve 5 and the liquid injection hole 14 can be selected from existing structure designs in the art, and therefore will not be described here.

[0045] Compared with the structure in the prior art, the cover plate assembly provided in this embodiment, on the one hand, solves the problem of short circuit between the electrode tab and the battery shell caused by uncontrollable bending and direction of the electrode tab. On the other hand, by fixing the connecting piece 4 in the containing groove 214 of the first plastic part 21 located above the battery cover plate 1 through the binding belt 3, the occupation of the internal space of the battery is effectively reduced.

[0046] The application also provides a battery comprising the cover plate assembly in the embodiment.

[0047] Obviously, the above embodiments of the utility model are only examples for clearly explaining the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled in the art, other different forms of changes or changes can be made on the basis of the above description. Here, all the embodiments are not enumerated. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. Cover plate assembly, characterized in that, include: A battery cover plate (1), wherein the battery cover plate (1) is provided with an electrode groove (11); A plastic component (2), the plastic component (2) being provided with a first plastic part (21) and a second plastic part (22), the first plastic part (21) being connected above the battery cover (1) and located in the electrode groove (11), the second plastic part (22) being connected below the battery cover (1), the first plastic part (21) having a receiving groove (214), the receiving groove (214) being used to receive the connecting piece (4); The battery cover (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 binding strap (3) is wound around the outside of the plastic component (2), and at least a portion of the binding strap (3) is pressed against the connecting piece (4). The binding strap (3) is used to fix the connecting piece (4) in the receiving groove (214).

2. The cover plate assembly according to claim 1, wherein: The binding tape (3) is configured as an adhesive tape, the adhesive tape is adhered to the outside of the connecting piece (4) and the plastic component (2), and the adhesive tape is configured as multiple layers.

3. The cover plate assembly according to claim 2, wherein: The thickness of each layer of the adhesive tape is 25-150 μm.

4. The cover plate assembly according to claim 2, wherein: The adhesive tape is PEI adhesive tape, PI adhesive tape, PP adhesive tape, PE adhesive tape or PET adhesive tape.

5. The cover plate assembly according to claim 1, wherein: The binding straps (3) are provided in plurality, and the plurality of binding straps (3) are arranged at intervals along the length direction of the connecting piece (4).

6. The cover plate assembly according to claim 1, wherein: Two first through holes (12) arranged opposite to each other are provided at the bottom of the electrode slot (11); the first plastic part (21) is correspondingly provided with two second through holes (213); the second through holes (213) can be aligned and communicated 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 communicated with the first through hole (12); the two first through holes (12), the two second through holes (213) and the two third through holes (221) together form two oppositely arranged through holes; the binding band (3) is wound through the two through holes; 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 battery cover (1) from 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).

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

9. The cover plate assembly according to any one of claims 1 to 8, characterized in that: The battery cover plate (1) is further provided with a mounting groove (13), and the mounting groove (13) is used for mounting the explosion-proof valve (5).

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

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