Battery top cover assembly and battery

Abstract

The utility model provides a battery top cover assembly and a battery, the battery top cover assembly comprises a cover plate and an insulating part, the insulating part is provided with a protruding structure protruding towards one side deviating from the cover plate, and the protruding structure is arranged between a positive pole lug and a negative pole lug of the battery. Avoiding areas used for avoiding the tabs are arranged on the two side walls, facing the tabs, of the protruding structures, and the distance between the ends, close to the cover plate, of the two avoiding areas in the protruding direction is larger than the distance between the ends, away from the cover plate, of the two avoiding areas. According to the battery top cover assembly and the battery provided by the utility model, the problem that a certain risk is caused to the safety of the battery due to short circuit caused by the fact that a plastic body on the lower surface of the top cover of a battery cover plate in the prior art interferes with the tabs and the tabs are bent by the cover plate and then the bent tabs are inserted into a roll core can be solved.

Description

Technical Field

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

[0002] Batteries are used to output electricity. Storage batteries or rechargeable batteries are secondary batteries that can be used multiple times by charging, so they are widely used in work and life.

[0003] The top cover is an important component in the battery. During the assembly process of the battery, some batteries in the prior art have a small center distance between the positive and negative pole ears. Therefore, interference will occur between the plastic on the lower surface of the top cover and the positive and negative pole ears, causing the cover to bend the positive and negative pole ears, and then the bent positive and negative pole ears are inserted into the winding core, resulting in a short circuit, which will pose a certain risk to battery safety.

[0004] As can be seen from the above, the current battery cover has interference between the plastic on the lower surface of the top cover and the pole ear, causing the cover to bend the pole ear, and then the bent pole ear is inserted into the winding core, causing a short circuit and posing a certain risk to battery safety. Utility Model Content

[0005] The main purpose of the utility model is to provide a battery top cover assembly and a battery, so as to solve the problem in the prior art that interference occurs between the plastic body on the lower surface of the top cover and the pole ear, causing the cover to bend the pole ear, and then the bent pole ear is inserted into the winding core, resulting in a short circuit and posing a certain risk to battery safety.

[0006] In order to achieve the above-mentioned purpose, according to one aspect of the utility model, a battery top cover assembly is provided, the battery top cover assembly includes a cover plate; an insulating member, the insulating member is arranged on the cover plate, the insulating member has a protruding structure protruding toward the side away from the cover plate, the protruding structure is arranged between the positive pole ear and the negative pole ear of the battery, and the protruding structure has a avoidance area for avoiding the pole ear on the two side walls facing the pole ear, and the distance between the two avoidance areas close to one end of the cover plate along the protruding direction is greater than the distance between the two avoidance areas away from the one end of the cover plate.

[0007] Furthermore, the outer peripheral wall of the raised structure along the raised direction is formed into a ring structure with a gradually narrowing opening, and the raised structure also has a raised top arranged at the open end of the ring structure; an avoidance area is formed on the two side walls of the ring structure facing the pole ear at the end with a smaller opening.

[0008] Furthermore, the opening of the end of the annular structure close to the cover plate is larger than the opening of the end of the annular structure away from the cover plate; and / or the annular structure and the top of the protrusion are an integrated structure.

[0009] Furthermore, outer surfaces of two side walls of the protruding structure facing the pole lug are arc-shaped structures, and the arc-shaped structures form avoidance areas.

[0010] Furthermore, the protrusion height H of the protrusion structure satisfies 0.1 mm≤H≤100 mm.

[0011] Furthermore, along the length direction of the cover plate, the insulating part has at least a bending portion arranged at both ends of the cover plate, the bending direction of the bending portion is arranged in the same direction as the protruding direction of the protruding structure, and the distance between the end of the protruding structure away from the cover plate and the cover plate is not greater than the distance between the end of the bending portion away from the cover plate and the cover plate.

[0012] Furthermore, the battery top cover assembly also includes an explosion-proof valve, which is arranged on the cover plate, and the protruding structure has an opening connected to the explosion-proof valve.

[0013] Furthermore, the battery top cover assembly also includes a pole arranged on the cover plate, and the insulating member is provided with a avoidance hole for avoiding the pole, and the pole passes through the avoidance hole.

[0014] According to another aspect of the utility model, a battery is provided, which includes the above-mentioned battery top cover assembly and a box body, wherein the battery top cover assembly is covered on the box body to form an installation space; and a battery cell, wherein the battery cell is arranged inside the installation space, and the battery cell is electrically connected to the pole of the battery top cover assembly through the pole ear.

[0015] Furthermore, the battery also includes an insulating gasket, the tabs include a positive tab and a negative tab, the insulating gasket is arranged between the positive tab and the negative tab, and the insulating gasket is bonded to the battery cell or clamped to the insulating member of the battery top cover assembly.

[0016] By applying the technical solution of the utility model, the battery top cover assembly includes a cover plate and an insulating member, the insulating member has a protruding structure protruding toward the side away from the cover plate, the protruding structure is arranged between the positive pole ear and the negative pole ear of the battery, and the protruding structure has avoidance areas for avoiding the pole ears on the two side walls facing the pole ears, the distance between the two avoidance areas close to one end of the cover plate along the protruding direction is greater than the distance between the two avoidance areas away from the one end of the cover plate, and the protruding structure also has a protruding top end arranged at the open end of the annular structure.

[0017] From the above, it can be seen that a protruding structure is arranged on the insulating part of the battery top cover assembly of the present application, and an avoidance area for avoiding the pole ear is provided on the two side walls of the protruding structure facing the pole ear. The setting of the avoidance area can avoid the pole ear during the battery assembly process, thereby avoiding the problem that the insulating part in the prior art interferes with the pole ear, causing the insulating part to bend the pole ear, and the contact between the pole ear and the battery cell causes a short circuit, which poses a certain risk to the battery safety. The battery top cover assembly of the present application is beneficial to improving the product safety performance, thereby improving the reliability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0019] Figure 1 A three-dimensional structural schematic diagram of a battery top cover assembly of the utility model is shown;

[0020] Figure 2 A cross-sectional view of a battery top cover assembly of the utility model is shown;

[0021] Figure 3 Shows Figure 2 The enlarged view of A in FIG.

[0022] Figure 4 A schematic structural diagram of welding the pole ear and the top cover assembly of the utility model is shown;

[0023] Figure 5 A cross-sectional view of a battery of the present utility model is shown;

[0024] Figure 6 The utility model shows a schematic diagram of the installation structure of the insulating gasket.

[0025] The above drawings include the following reference numerals:

[0026] 1. Battery top cover assembly; 11. Positive pole; 12. Cover plate; 13. Liquid injection hole; 14. Explosion-proof valve; 15. Negative pole; 16. Insulating member; 161. Protruding structure; 1611. Ring structure; 1612. Protruding top; 162. Bending portion; 2. Box body; 3. Battery cell; 4. Positive pole ear; 5. Negative pole ear; 6. Insulating gasket. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0029] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0030] Embodiment 1

[0031] In order to solve the problem in the prior art that interference occurs between the plastic body on the lower surface of the top cover and the pole ear, causing the cover to bend the pole ear, and then the bent pole ear is inserted into the winding core, resulting in a short circuit that poses a certain risk to battery safety, the present embodiment provides a battery top cover assembly.

[0032] like Figures 1 to 4 As shown, the battery top cover assembly 1 includes a cover plate 12 and an insulating member 16, the insulating member 16 is arranged on the cover plate 12, and the insulating member 16 has a protruding structure 161 protruding toward the side away from the cover plate 12, the protruding structure 161 is arranged between the positive pole ear 4 and the negative pole ear 5 of the battery, and the protruding structure 161 has a avoidance area for avoiding the pole ears on the two side walls facing the pole ears, and the distance between the two avoidance areas close to the cover plate 12 along the protruding direction is greater than the distance between the two avoidance areas away from the cover plate 12.

[0033] It can be explained that, in order to facilitate the understanding of “the distance between the two avoidance areas close to the cover plate 12 along the convex direction is greater than the distance between the two avoidance areas away from the cover plate 12”, Figure 3 As shown in the figure, the distance between the two avoidance areas near the end of the cover plate 12 along the convex direction can be understood as Figure 3 In S1, the distance between the two avoidance areas away from the end of the cover plate 12 along the convex direction can be understood as Figure 3 S2 in the figure; that is, "the distance between the two avoidance areas along the convex direction close to the cover plate 12 is greater than the distance between the two ends away from the cover plate 12" means S1>S2.

[0034] Specifically, a protruding structure 161 is arranged on the insulating part 16 of the battery top cover assembly 1 of the present application. The protruding structure 161 has an avoidance area for avoiding the pole ear on the two side walls facing the pole ear. The setting of the avoidance area can avoid the pole ear during the battery assembly process, thereby avoiding the problem that the insulating part 16 in the prior art interferes with the pole ear, causing the insulating part 16 to bend the pole ear, and the pole ear contacts the battery cell 3 to cause a short circuit, which poses a certain risk to the battery safety. The battery top cover assembly 1 of the present application is beneficial to improving the product safety performance, thereby improving the reliability of the product.

[0035] Furthermore, the outer periphery of the protruding structure 161 along the protruding direction is formed into a tapered annular structure 1611, and the protruding structure 161 also has a protruding top 1612 arranged at the open end of the annular structure 1611, and an avoidance area is formed on the two side walls of the annular structure 1611 at the end with a smaller opening facing the pole ear.

[0036] Furthermore, the battery top cover assembly 1 also includes an explosion-proof valve 14, which is arranged on the cover plate 12, and the raised structure 161 has an opening connected to the explosion-proof valve 14. When the battery cell 3 generates gas, it can be connected to the explosion-proof valve 14 through the opening on the raised structure 161 for exhaust, thereby improving the safety of battery use.

[0037] The protrusion structure 161 used in the present application has an outer wall of an annular structure 1611 and a planar structure of a protrusion top 1612 , and an opening is provided on the planar structure, and the opening is used to communicate with the explosion-proof valve 14 .

[0038] Preferably, a plurality of openings are provided, and the plurality of openings are in a grid-like structure.

[0039] In another embodiment, the outer peripheral wall of the protruding structure 161 along the protruding direction is formed into an annular structure 1611 with a gradually narrowing opening.

[0040] Among them, the raised structure 161 adopts a tapered ring structure 1611 with an outer periphery. The opening reduction setting of the ring structure 1611 can be used to avoid the pole ear, so as to avoid the problem that the insulating part 16 in the prior art will interfere with the pole ear and cause the insulating part 16 to bend the pole ear, resulting in the pole ear contacting the battery cell 3 and causing a short circuit, which will pose a certain risk to battery safety. The battery top cover assembly 1 of the present application is conducive to improving the product safety performance, thereby improving the reliability of the product.

[0041] It should be noted that, in this embodiment, the tabs include a positive tab 4 and a negative tab 5, and the positive tab 4 and the negative tab 5 are arranged along the length direction of the cover plate 12. Figure 1 The X-direction spacing settings are shown.

[0042] Furthermore, the insulating member 16 is attached to the cover plate 12 , wherein the projection of the protruding structure 161 on the cover plate 12 is located between the positive electrode tab 4 and the negative electrode tab 5 .

[0043] Furthermore, the insulating member 16 is a colloid, specifically a plastic, which has a good insulating effect to achieve the insulation between the cover plate 12 and the battery cell 3. The insulating member 16 is arranged on the surface of the cover plate 12 facing the battery cell 3, also called the lower plastic member.

[0044] Furthermore, the protruding top 1612 is disposed at the opening of the annular structure 1611 away from the cover plate 12. The annular structure 1611 and the protruding top 1612 are an integrated structure, which is convenient for processing and is conducive to improving production efficiency and battery assembly efficiency.

[0045] In this embodiment, the opening of the end of the annular structure 1611 close to the cover plate 12 is larger than the opening of the end of the annular structure 1611 away from the cover plate 12, thereby realizing that the protruding structure 161 protrudes along the side away from the cover plate 12, and the protrusion of the annular structure is a tapering structure to form an annular structure 1611 with a gradually increasing protrusion height.

[0046] The opening of the end of the annular structure 1611 away from the cover plate 12 is elliptical, circular or track-shaped, and the corresponding shape of the protruding top 1612 is elliptical, circular or track-shaped, which is not limited to the above-mentioned elliptical, circular or track-shaped, and can also be other shapes. It should be noted that the track shape is a structure surrounded by two straight lines at both ends and two arcs, wherein the two straight lines are spaced and arranged in parallel.

[0047] In this embodiment, the outer surfaces of the two side walls of the protruding structure 161 facing the pole lug are arc-shaped structures, and the arc-shaped structures form avoidance zones, so as to avoid the pole lugs through the arc-shaped structures.

[0048] Furthermore, the protruding structure 161 is provided with one or more. When the protruding structure 161 is provided with more than one, the protruding structures 161 are arranged along the width direction of the cover plate 12. Figure 1 The Y-direction spacing shown is arranged on the cover plate 12 , and adaptation to a cover plate 12 with a larger width is achieved by arranging a plurality of convex structures 161 , wherein the number of convex structures 161 is adaptively arranged according to the size of the cover plate 12 .

[0049] In this embodiment, the protrusion height H of the protrusion structure 161 satisfies 0.1mm≤H≤100mm. When the protrusion height of the protrusion structure 161 is greater than 100mm, interference will occur between the protrusion structure 161 and the battery cell 3 and the pole ear, resulting in inconvenient assembly. When the protrusion height of the protrusion structure 161 is less than 0.1mm, the protrusion height is too small to form an air cavity structure for communicating with the explosion-proof valve 14. Specifically, the protrusion height H can be 1mm, 10mm, 20mm, 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm.

[0050] In this embodiment, the protruding structure 161 is provided with an arc chamfer, and the arc chamfer is provided to prevent the tip from abutting against the battery cell 3 and causing damage to the battery cell 3 .

[0051] like Figure 1 and Figure 2As shown, along the length direction of the cover plate 12, the insulating member 16 has at least a bending portion 162 arranged at both ends of the cover plate 12, the bending direction of the bending portion 162 is arranged in the same direction as the protruding direction of the protruding structure 161, and the distance between the end of the protruding structure 161 away from the cover plate 12 and the cover plate 12 is not greater than the distance between the end of the bending portion 162 away from the cover plate 12 and the cover plate 12.

[0052] The length direction of the cover plate 12 is Figure 1 The X direction is shown.

[0053] Specifically, the bent portion 162 is disposed to achieve a sealed contact between the insulating member 16 and the top surface of the battery cell 3 , so that the insulating member 16 can play a buffering role when the battery cell 3 is subjected to an external force, thereby protecting the battery cell 3 .

[0054] Furthermore, since the distance between the protruding top 1612 of the protruding structure 161 and the cover plate 12 is not higher than the distance between the end of the bending portion 162 away from the cover plate 12 and the cover plate 12, the problem of the insulating part 16 being unable to be assembled due to the interference between the protruding structure 161 and the battery cell 3 can be avoided.

[0055] The protruding direction of the protruding structure 161 and the bending direction of the bending portion 162 are: Figure 1 The Z direction is shown.

[0056] like Figures 1 to 3 As shown, the cover plate 12 also has a liquid injection hole 13 , and the insulating member 16 has a through hole connected to the liquid injection hole 13 .

[0057] Furthermore, the battery top cover assembly 1 also includes a pole arranged on the cover plate 12, and the insulating member 16 has a avoidance hole for avoiding the pole, and the pole passes through the avoidance hole.

[0058] Among them, the poles include a positive pole 11 and a negative pole 15, an explosion-proof valve 14 and a liquid injection hole 13 are arranged between the positive pole 11 and the negative pole 15, and two corresponding avoidance holes are arranged corresponding to the positive pole 11 and the negative pole 15 respectively.

[0059] In this embodiment, the pole is assembled through the through hole, and the insulating member 16 is sleeved on the outside of the pole to achieve insulation and sealing; the through hole and the avoidance hole are connected to facilitate the subsequent liquid adding operation.

[0060] Embodiment 2

[0061] This embodiment provides a battery such as Figure 4 , Figure 5 and Figure 6 As shown, the battery includes the battery top cover assembly 1 in the first embodiment.

[0062] In this embodiment, the battery also includes a case body 2 and a battery cell 3. The battery top cover assembly 1 is covered on the case body 2. The cover plate 12 of the battery top cover assembly 1 and the case body 2 form an installation space. The battery cell 3 is arranged inside the installation space. The battery cell 3 is electrically connected to the pole of the battery top cover assembly 1 through the pole ear.

[0063] Specifically, the battery cell 3 is installed inside the installation space, and the battery cell 3 is electrically connected by welding the pole ear to the pole column. The protruding structure 161 on the insulating part 16 of the present application can avoid the pole ear and avoid interference with the pole ear, resulting in the protruding structure 161 abutting and squeezing the pole ear during the assembly process of the battery top cover assembly 1.

[0064] Furthermore, the battery also includes an insulating gasket 6, the tabs include a positive tab 4 and a negative tab 5, the insulating gasket 6 is arranged between the positive tab 4 and the negative tab 5, and the insulating gasket 6 is bonded to the battery cell 3 or clamped to the insulating part 16 of the battery top cover assembly 1.

[0065] When the insulating gasket 6 is bonded to the battery core 3 , double-sided tape may be used for bonding; when the insulating gasket 6 is snap-fitted to the insulating member 16 , the insulating gasket 6 and the insulating member 16 are connected by a snap-fit ​​structure of a snap-fit ​​and a snap-fit ​​groove.

[0066] Furthermore, when the insulating gasket 6 is engaged with the insulating member 16 , specifically, the insulating gasket 6 and the protruding structure 161 are engaged with each other.

[0067] By providing an insulating gasket 6 between the positive electrode tab 4 and the negative electrode tab 5, the surface of the battery cell 3 is insulated to avoid leakage or cross-current that may cause certain risks to battery safety.

[0068] In this embodiment, the shape of the tab may be trapezoidal, square or circular.

[0069] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0070] A protruding structure 161 is arranged on the insulating part 16 of the battery top cover assembly 1 of the present application, and an avoidance area for avoiding the pole ears is provided on the two side walls of the protruding structure facing the pole ears. The setting of the avoidance area can avoid the pole ears during the battery assembly process, thereby avoiding the problem in the prior art that the insulating part will interfere with the pole ears, causing the insulating part to bend the pole ears, and the contact between the pole ears and the battery cells will cause a short circuit, which will pose a certain risk to the battery safety. The battery top cover assembly of the present application is beneficial to improving the product safety performance, thereby improving the reliability of the product.

[0071] Obviously, the embodiments described above are only some embodiments of the utility model, not all embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0072] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0073] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0074] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery top cover assembly, characterized in that: include: Cover plate (12); An insulating member (16), the insulating member (16) being arranged on the cover plate (12), the insulating member (16) having a protruding structure (161) protruding toward a side away from the cover plate (12), the protruding structure (161) being arranged between a positive pole lug (4) and a negative pole lug (5) of the battery, and having avoidance areas for avoiding the pole lugs on two side walls of the protruding structure (161) facing the pole lugs; Along the protruding direction, the distance between the two avoidance areas at one end close to the cover plate (12) is greater than the distance between the two avoidance areas at one end away from the cover plate (12).

2. The battery top cover assembly according to claim 1, characterized in that: The outer peripheral wall of the protruding structure (161) is formed into a ring-shaped structure (1611) with a gradually narrowing opening along the protruding direction, and the protruding structure (161) also has a protruding top (1612) arranged at the opening end of the ring-shaped structure (1611); the avoidance zone is formed on the two side walls of the ring-shaped structure (1611) at the end with the smaller opening facing the pole ear.

3. The battery top cover assembly according to claim 2, characterized in that: An opening at one end of the annular structure (1611) close to the cover plate (12) is larger than an opening at one end of the annular structure (1611) away from the cover plate (12); and / or The annular structure (1611) and the raised top (1612) are an integrated structure.

4. The battery top cover assembly according to claim 1, characterized in that: The outer surfaces of the two side walls of the protruding structure (161) facing the pole lug are in an arc-shaped structure, and the arc-shaped structure forms the avoidance area.

5. The battery top cover assembly according to claim 1, characterized in that: The protrusion height H of the protrusion structure (161) satisfies 0.1 mm≤H≤100 mm.

6. The battery top cover assembly according to claim 1, characterized in that: Along the length direction of the cover plate (12), the insulating member (16) has at least a bending portion (162) arranged at both ends of the cover plate (12); the bending direction of the bending portion (162) is arranged in the same direction as the protruding direction of the protruding structure (161); and the distance between one end of the protruding structure (161) away from the cover plate (12) and the cover plate (12) is not greater than the distance between one end of the bending portion (162) away from the cover plate (12) and the cover plate (12).

7. The battery top cover assembly according to any one of claims 1 to 6, characterized in that: The battery top cover assembly further comprises an explosion-proof valve (14), wherein the explosion-proof valve (14) is arranged on the cover plate (12), and the protruding structure (161) has an opening which is in communication with the explosion-proof valve (14).

8. The battery top cover assembly according to any one of claims 1 to 6, characterized in that: The battery top cover assembly also includes a pole arranged on the cover plate (12); the insulating member (16) has a evacuation hole for evading the pole, and the pole passes through the evacuation hole.

9. A battery, characterized in that: The battery comprises: The battery top cover assembly (1) according to any one of claims 1 to 8; A box body (2), wherein the battery top cover assembly (1) is covered on the box body (2) to form an installation space; A battery cell (3), wherein the battery cell (3) is arranged inside the installation space, and the battery cell (3) is electrically connected to a pole of the battery top cover assembly (1) via a pole lug.

10. The battery according to claim 9, characterized in that The battery further comprises an insulating gasket (6), the tabs comprise a positive tab (4) and a negative tab (5), the insulating gasket (6) is arranged between the positive tab (4) and the negative tab (5), and the insulating gasket (6) is bonded to the battery cell (3) or snap-fitted to an insulating member (16) of the battery top cover assembly (1).

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