Battery cover plate and battery

Abstract

The utility model discloses a battery cover plate and a battery, the battery cover plate is used for the battery, the battery comprises a pole group, the battery cover plate comprises a cover plate body, a fixing piece and a sealing plate, and the cover plate body is provided with a mounting hole; the fixing piece penetrates through the mounting hole and is provided with a penetrating hole; the sealing plate is located on the side, away from the pole group, of the cover plate body, the pole lugs of the pole group penetrate through the penetrating holes and are fixedly connected with the sealing plate, and the sealing plate is connected with the fixing piece to seal the penetrating holes. According to the battery cover plate disclosed by the utility model, the tabs are led to the outer side of the battery cover plate through the penetrating holes in the fixing pieces and are electrically connected with the sealing plate positioned on the outer side of the cover plate body, so that the space occupied by the tabs in the shell can be saved, the space utilization rate of a pole group is improved, and the energy density of the pole group can be further improved.

Description

Technical Field

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

[0002] The space utilization rate of the internal volume of the battery is related to the volume energy density of the electrode group. Improving the space utilization rate is conducive to reducing the cost of the battery. In the related art, the welding of the battery cover and the pole lug requires leaving a welding position of the connecting piece or the pole lug under the battery cover, resulting in a reduction in the space utilization rate inside the shell. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the utility model is to provide a battery cover, in which the pole ear is led to the outside of the cover body through a hole and is electrically connected to a sealing plate located outside the cover body, which can save the space in the shell occupied by the pole ear, so as to improve the space utilization rate of the pole group, and further improve the energy density of the pole group.

[0004] The utility model also provides a battery with the battery cover plate.

[0005] According to the battery cover plate of the first aspect of the present invention, the battery includes a pole group, and the battery cover plate includes: a cover plate body, the cover plate body has a mounting hole; a fixing member, the fixing member is passed through the mounting hole, and the fixing member has a penetration hole; a sealing plate, the sealing plate is located on the side of the cover plate body away from the pole group, the pole ear of the pole group is passed through the penetration hole and is fixedly connected to the sealing plate, and the sealing plate is connected to the fixing member for closing the penetration hole.

[0006] According to the battery cover of the embodiment of the utility model, the pole ear is led to the outside of the battery cover through the hole on the fixing piece, and is electrically connected to the sealing plate located on the outside of the cover body, which can save the space occupied by the pole ear in the shell, so as to improve the space utilization rate of the pole group, and further improve the energy density of the pole group.

[0007] According to some embodiments of the utility model, the fixing member includes a first fixing portion and a second fixing portion that are connected, the first fixing portion is located on the side of the cover plate body away from the pole group, the second fixing portion is penetrated through the mounting hole, the second fixing portion has the penetration hole, the first fixing portion has a accommodating cavity with an opening on one side, and the accommodating cavity is connected to the penetration hole, the sealing plate is arranged at the opening for closing the accommodating cavity, the pole ear includes a first pole ear portion and a second pole ear portion that are arranged at an angle, the second pole ear portion is penetrated through the penetration hole, the first pole ear portion is located in the accommodating cavity and is fixedly connected to the sealing plate.

[0008] According to some embodiments of the present invention, two sides of the first pole ear portion are respectively in contact with the sealing plate and the bottom wall of the first fixing portion.

[0009] According to some embodiments of the present invention, the first pole ear portion and the second pole ear portion are perpendicular to each other.

[0010] According to some embodiments of the present invention, the battery cover further includes: a sealing ring, wherein the sealing ring is located in the mounting hole and between the cover body and the second fixing portion.

[0011] According to some embodiments of the utility model, the battery cover plate also includes a fixing plate, which is located on a side of the cover plate body close to the pole group and is fixedly connected to the second fixing portion, the fixing plate has a through hole connected to the penetration hole, the pole ear is penetrated through the through hole, and the fixing plate abuts against the sealing ring.

[0012] According to some embodiments of the present invention, the fixing member and the sealing plate are integrally formed.

[0013] According to some embodiments of the utility model, the battery cover plate further includes: an upper insulating member, the upper insulating member is located on the side of the cover plate body away from the pole group, the upper insulating member has a receiving groove, the first fixing portion is located in the receiving groove, the upper insulating member has a avoidance hole passing through the bottom wall of the receiving groove, and the second fixing portion is passed through the avoidance hole.

[0014] According to some embodiments of the utility model, the battery cover plate also includes: a lower insulating member, the lower insulating member is located on a side of the cover plate body close to the pole group, the lower insulating member has a limiting groove, the fixing plate is located in the limiting groove, the lower insulating member has a through hole passing through the bottom wall of the limiting groove, and the second fixing portion is passed through the through hole.

[0015] A battery according to an embodiment of the second aspect of the utility model includes: a battery cover according to an embodiment of the first aspect of the utility model.

[0016] According to the battery of the embodiment of the utility model, by providing the above-mentioned battery cover plate, the space in the shell occupied by the pole ear can be saved, so as to improve the space utilization rate of the pole group, the energy density of the pole group can be improved, and then the energy density of the battery can be improved.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of a battery according to some embodiments of the present utility model;

[0020] Figure 2 yes Figure 1 Exploded view of the battery;

[0021] Figure 3 is an exploded view of a battery cover according to some embodiments of the utility model;

[0022] Figure 4 yes Figure 1 A cross-sectional view of a battery;

[0023] Figure 5 is a schematic diagram of a fixing member and a sealing plate being an integrally formed member according to some embodiments of the utility model;

[0024] Figure 6 yes Figure 5 Schematic diagram of the middle sealing plate after folding.

[0025] Reference numerals:

[0026] 100. Battery;

[0027] 11. housing; 12. pole group; 13. pole ear; 131. first pole ear portion; 132. second pole ear portion;

[0028] 20. Battery cover; 3. Cover body; 31. Mounting hole; 4. Fixing piece; 41. First fixing part; 411. Accommodating cavity; 412. Opening; 42. Second fixing part; 421. Through hole; 5. Sealing plate; 61. Sealing ring; 62. Upper insulating piece; 621. Accommodating groove; 622. Avoidance hole; 63. Lower insulating piece; 631. Through hole; 64. Fixing plate; 641. Via hole. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and 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 only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present utility model, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0031] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0032] Reference below Figure 1-Figure 6 The battery cover 20 according to the embodiment of the present invention is described.

[0033] According to the battery cover 20 of the first embodiment of the utility model, the battery cover 20 is used for the battery 100, the battery 100 includes a pole group 12, and the battery 100 also includes a shell 11, and the pole group 12 is located in the shell 11. The battery cover 20 includes a cover body 3, a fixing member 4 and a sealing plate 5, the cover body 3 has a mounting hole 31, and the mounting hole 31 penetrates the cover body 3 along the thickness direction of the battery 100 body. The fixing member 4 is penetrated in the mounting hole 31, and the fixing member 4 has a penetration hole 421. The sealing plate 5 is located on the side of the cover body 3 away from the pole group 12, and the sealing plate 5 is located on the outside of the shell 11. The pole ear 13 of the pole group 12 is penetrated in the penetration hole 421, and the pole ear 13 is fixedly connected to the sealing plate 5, and the sealing plate 5 is connected to the fixing member 4 for closing the penetration hole 421. The sealing plate 5 can not only play the role of electrically connecting the pole ear 13, but also can seal the shell 11 to prevent the electrolyte in the shell 11 from flowing out. For example, the sealing plate 5 can be an aluminum plate.

[0034] In the related art, the battery cover 20 also includes a lead-out sheet, and the pole ear 13 is electrically connected to the lead-out sheet in the shell 11, which occupies the space in the shell 11 to a certain extent, which is not conducive to the utilization of the space in the shell 11. In the present application, by penetrating the pole ear 13 through the penetration hole 421, leading from the penetration hole 421 through the pole ear 13 to the outside of the cover body 3, and electrically connecting with the sealing plate 5 located on the outside of the cover body 3, the space in the shell 11 occupied by the pole ear 13 when the battery cover 20 is electrically connected can be saved, so as to improve the space utilization rate of the pole group 12, and then the energy density of the pole group 12 can be improved.

[0035] According to the battery cover 20 of the embodiment of the utility model, the pole ear 13 is led to the outside of the battery cover 20 through the through hole 421 on the fixing member 4, and is electrically connected to the sealing plate 5 located on the outside of the cover body 3, which can save the space occupied by the pole ear 13 in the shell 11, so as to improve the space utilization rate of the pole group 12, and further improve the energy density of the pole group 12.

[0036] According to some embodiments of the present invention, referring to Figure 3-Figure 4 The fixing member 4 includes a first fixing portion 41 and a second fixing portion 42 connected to each other. The first fixing portion 41 is located on the side of the cover body 3 away from the pole group 12. The second fixing portion 42 is penetrated in the mounting hole 31. The second fixing portion 42 has a penetration hole 421. The first fixing portion 41 is located outside the cover body 3. The first fixing portion 41 has a receiving cavity 411 with an opening 412 on one side, and the receiving cavity 411 is connected to the penetration hole 421. The sealing plate 5 is disposed at the opening 412 to seal the receiving cavity 411. The pole ear 13 can be introduced into the receiving cavity 411 through the penetration hole 421.

[0037] The pole ear 13 includes a first pole ear portion 131 and a second pole ear portion 132 arranged at an angle, the second pole ear portion 132 is penetrated through the penetration hole 421, and the first pole ear portion 131 is located in the accommodating cavity 411 and is fixedly connected to the sealing plate 5, which can increase the connection area between the pole ear 13 and the sealing plate 5, and further increase the amount of overcurrent between the pole ear 13 and the sealing plate 5. For example, the angle between the first pole ear portion 131 and the second pole ear portion 132 can range from 80° to 110°.

[0038] According to some embodiments of the present invention, referring to Figure 4 , Figure 6 The two sides of the first pole ear portion 131 are respectively in contact with the sealing plate 5 and the bottom wall of the first fixing portion 41, and the sealing plate 5 can press the first pole ear portion 131 against the bottom wall of the first fixing portion 41. The first pole ear portion 131 is fixed in the accommodating cavity 411 to prevent the first pole ear portion 131 from being loosely connected to the sealing plate 5 when the battery 100 is shaken.

[0039] According to some embodiments of the present invention, referring to Figure 4 , Figure 6 The first pole ear portion 131 and the second pole ear portion 132 are perpendicular to each other, which is determined by the positional relationship between the first fixing portion 41 and the second fixing portion 42 , and can facilitate the bending of the first pole ear portion 131 relative to the second pole ear portion 132 .

[0040] According to some embodiments of the present invention, referring to Figure 3-Figure 6 The battery cover 20 further includes: a sealing ring 61, which is located in the mounting hole 31 and between the cover body 3 and the second fixing portion 42, and is used to seal the assembly gap between the cover body 3 and the second fixing portion 42; the sealing ring 61 is an insulating plastic part, which can prevent the second fixing portion 42 from contacting the housing 11 and prevent the battery 100 from short-circuiting. For example, the sealing ring 61 can be interference-fitted with the second fixing portion 42.

[0041] According to some embodiments of the present invention, referring to Figure 4-Figure 6 The battery cover 20 further includes a fixing plate 64, which is located on a side of the cover body 3 close to the electrode group 12, and is fixedly connected to the second fixing portion 42. The fixing plate 64 has a through hole 641 connected to the through hole 421, and the electrode ear 13 is passed through the through hole 641. The fixing plate 64 abuts against the sealing ring 61. The fixing plate 64 is connected to the second fixing portion 42, and is used to fix the sealing ring 61 between the cover body 3 and the first fixing portion 41, further increasing the firmness of the sealing ring 61 in the mounting hole 31.

[0042] According to some embodiments of the present invention, referring to Figure 5-Figure 6 The fixing member 4 and the sealing plate 5 are integrally formed, which can save a process of connecting the sealing plate 5 to the fixing member 4 and can also increase the connection strength between the fixing member 4 and the sealing plate 5.

[0043] For example, the fixing member 4 includes a first fixing portion 41 and a second fixing portion 42, and one end of the sealing plate 5 can be connected to one end of the first fixing portion 41. After the pole ear 13 is electrically connected to the sealing plate 5, the sealing plate 5 can be folded to drive the pole ear 13 to bend into the accommodating cavity 411, and then the other end of the sealing plate 5 is welded to the other end of the first fixing portion 41 to seal the accommodating cavity 411.

[0044] For example, the fixing member 4 and the sealing plate 5 may also be separate parts, and the sealing plate 5 may be welded to the fixing member 4 .

[0045] According to some embodiments of the present invention, referring to Figure 3-Figure 6The battery cover 20 further includes: an upper insulating member 62, which is located on the side of the cover body 3 away from the electrode group 12, and has a receiving groove 621. The first fixing portion 41 is located in the receiving groove 621. The upper insulating member 62 has an avoidance hole 622 that penetrates the bottom wall of the receiving groove 621, and the second fixing portion 42 is penetrated in the avoidance hole 622. The receiving groove 621 of the upper insulating member 62 can play a role in positioning the first fixing portion 41. At the same time, the upper insulating member 62 is an insulating plastic member, which can be used to isolate the cover body 3 from the first fixing portion 41 to prevent the battery 100 from short circuiting. The upper insulating member 62 is an upper insulating glue.

[0046] According to some embodiments of the present invention, referring to Figure 3-Figure 6 The battery cover 20 further includes: a lower insulating member 63, the lower insulating member 63 is located on the side of the cover body 3 close to the electrode group 12, the lower insulating member 63 has a limiting groove, the fixing plate 64 is located in the limiting groove, the lower insulating member 63 has a through hole 631 that penetrates the bottom wall of the limiting groove, and the second fixing portion 42 is penetrated through the through hole 631. The limiting groove of the lower insulating member 63 can play a role in positioning the fixing plate 64, and the lower insulating member 63 is an insulating plastic member, which can be used to isolate the cover body 3 and the fixing plate 64 to prevent the battery 100 from short circuiting. The lower insulating member 63 is a lower plastic.

[0047] The battery 100 according to the second embodiment of the utility model includes: the battery cover 20 according to the first embodiment of the utility model.

[0048] According to the battery 100 of the embodiment of the utility model, by providing the above-mentioned battery cover 20, the space occupied by the pole ear 13 in the shell 11 can be saved, so as to improve the space utilization of the pole group 12, and the energy density of the pole group 12 can be improved, thereby improving the energy density of the battery 100.

[0049] In the description of this specification, the description with reference to the terms "some embodiments", "optionally", "further" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0050] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery cover for a battery, characterized in that: The battery comprises a pole group, and the battery cover comprises: A cover plate body, wherein the cover plate body has a mounting hole; A fixing member, the fixing member is inserted into the mounting hole, and the fixing member has a penetration hole; A sealing plate is located on a side of the cover plate body away from the pole group. The pole lug of the pole group is penetrated through the penetration hole and fixedly connected to the sealing plate. The sealing plate is connected to the fixing member for closing the penetration hole.

2. The battery cover according to claim 1, characterized in that: The fixing member includes a first fixing portion and a second fixing portion that are connected, the first fixing portion is located on a side of the cover plate body away from the pole group, the second fixing portion is penetrated through the mounting hole, the second fixing portion has the penetration hole, the first fixing portion has a accommodating cavity with an opening on one side, and the accommodating cavity is communicated with the penetration hole, the sealing plate is arranged at the opening for closing the accommodating cavity, the pole ear includes a first pole ear portion and a second pole ear portion that are arranged at an angle, the second pole ear portion is penetrated through the penetration hole, the first pole ear portion is located in the accommodating cavity and is fixedly connected to the sealing plate.

3. The battery cover according to claim 2, characterized in that: Both sides of the first pole lug portion are respectively in contact with the sealing plate and the bottom wall of the first fixing portion.

4. The battery cover according to claim 2, characterized in that: The first pole lug portion and the second pole lug portion are perpendicular to each other.

5. The battery cover according to claim 2, characterized in that: Also includes: A sealing ring is located in the mounting hole and between the cover body and the second fixing portion.

6. The battery cover according to claim 5, characterized in that: It also includes a fixing plate, which is located on one side of the cover body close to the pole group and fixedly connected to the second fixing portion. The fixing plate has a through hole connected to the penetration hole, the pole ear is penetrated through the through hole, and the fixing plate abuts against the sealing ring.

7. The battery cover according to claim 1, characterized in that: The fixing member and the sealing plate are integrally formed.

8. The battery cover according to claim 2, characterized in that: Also includes: An upper insulating member, the upper insulating member is located on a side of the cover body away from the pole group, the upper insulating member has a receiving groove, the first fixing portion is located in the receiving groove, the upper insulating member has a avoidance hole penetrating the bottom wall of the receiving groove, and the second fixing portion is penetrated through the avoidance hole.

9. The battery cover according to claim 6, characterized in that: Also includes: The lower insulating member is located on a side of the cover plate body close to the pole group, the lower insulating member has a limiting groove, the fixing plate is located in the limiting groove, the lower insulating member has a through hole penetrating the bottom wall of the limiting groove, and the second fixing portion is penetrated through the through hole.

10. A battery, characterized in that: include: A battery cover according to any one of claims 1 to 9.

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