CN218827487U

CN218827487U - Battery top cap and power battery

Info

Publication number: CN218827487U
Application number: CN202223290848.1U
Authority: CN
Inventors: 吴志康; 陈圣立; 韩延林; 林法稳; 张瑞朋
Original assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Current assignee: Jiangsu Zenio New Energy Battery Technologies Co Ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-04-07
Anticipated expiration: 2032-12-08

Abstract

The utility model relates to the technical field of energy storage devices, and discloses a battery top cover and a power battery, which comprise a top cover body, lower plastic and a first pole; a through hole is formed in the top cover body, the first pole is installed in the through hole, and the lower plastic is provided with an annular sealing portion used for sealing a gap between the first pole and the through hole. The utility model discloses a battery top cap through form annular sealing portion under on the plastic, when will descend the plastic to install on the top cap body, the gap between annular sealing portion seal top cap body and the first utmost point post to ensure battery top cap's gas tightness. In this embodiment, need not to adopt the sealing washer, further simplified the installation of battery top cap, and be favorable to reducing the manufacturing cost of battery top cap.

Description

Battery top cap and power battery

Technical Field

The utility model relates to an energy storage device technical field especially relates to a battery top cap and power battery.

Background

At present, a battery top cover comprises a top cover body, a pole column installed on the top cover body, and lower plastic used for separating the top cover body from a battery cell body, wherein the lower plastic is installed at the bottom of the top cover body; the top cover body is provided with a through hole, the pole column is installed in the through hole, and the pole column and the top cover body are sealed through a sealing ring to ensure the air tightness of the battery top cover.

Among the prior art, need set up the sealing washer in order to realize the sealed between utmost point post and the top cap body, the cooperation relation between sealing washer and the lower plastic, the cooperation relation between lower plastic and the top cap body need be considered in the installation of sealing washer, lead to the installation of battery top cap comparatively complicated, be unfavorable for simplifying the structure of battery top cap, and with the sealing washer to obtain the guarantor gas tightness not only the cost has been increased, there probably exists the neglected loading moreover and the sealing washer pressure equipment problem that does not target in place.

In view of the above, a battery top cover and a power battery are needed to simplify the structure of the battery top cover and reduce the production cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a battery top cap and power battery to simplify battery top cap structure, reduce manufacturing cost.

To achieve the purpose, the utility model adopts the following technical proposal:

a battery top cover comprises a top cover body, lower plastic and a first pole;

the top cap body is provided with a through hole, the first pole column is installed in the through hole, and the lower plastic is provided with an annular sealing part used for sealing a gap between the first pole column and the through hole.

Optionally, the lower plastic is formed on the lower surface of the top cover body through injection molding.

Optionally, a second pole is formed on the top cover body, and the second pole and the top cover body are integrally formed in a stamping mode.

Optionally, a positioning groove is formed in the first pole, and a positioning protrusion is formed on the annular sealing portion corresponding to the positioning groove to fix the first pole;

the annular sealing part is also provided with an annular clamping groove used for clamping the top cover body.

Optionally, the top cap body is provided with a first annular positioning groove and a second annular positioning groove at two ends of the through hole, respectively, and the annular sealing portion has a first positioning portion matching the first annular positioning groove and a second positioning portion matching the second annular positioning groove.

Optionally, the first annular positioning groove and the second annular positioning groove are both rectangular.

Optionally, in the thickness direction of the top cover body, the annular sealing portion penetrates through the through hole from bottom to top, and an extending sealing portion abutting against the top surface of the top cover body extends from the top of the annular sealing portion;

the lower plastic is integrally formed.

Optionally, still be provided with explosion-proof valve on the top cap body, the plastic corresponds down the explosion-proof valve is provided with the air outlet groove that runs through.

Optionally, the first terminal comprises a terminal body and a current collecting disc fixedly connected with the terminal body, the mounting groove is formed in the lower plastic, and the current collecting disc is embedded in the mounting groove.

Optionally, the lower plastic is provided with a hollow hole corresponding to the second pole.

A power cell, comprising:

a housing provided with an opening;

the battery cell is accommodated in the shell;

the battery top cover as described in any of the above, wherein the battery top cover is fixed to the opening, and is used for sealing the battery core in the casing.

Compared with the prior art, the utility model discloses following beneficial effect has:

in this embodiment, the annular sealing portion is formed on the lower plastic, and when the lower plastic is mounted on the top cap body, the annular sealing portion seals a gap between the top cap body and the first terminal post, so as to ensure the airtightness of the battery top cap. In this embodiment, need not to adopt the sealing washer, further simplified the installation of battery top cap, and be favorable to reducing the manufacturing cost of battery top cap.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.

The structure, ratio, size and the like shown in the drawings of the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the achievable purpose.

Fig. 1 is a schematic structural diagram of a battery top cover according to an embodiment of the present invention;

fig. 2 is a schematic top view of a battery top cap according to an embodiment of the present invention;

FIG. 3 isbase:Sub>A schematic view of the cross-sectional structure A-A of FIG. 2;

fig. 4 is an exploded schematic view of a battery top cover according to an embodiment of the present invention;

fig. 5 is an enlarged schematic view of the position a in fig. 4.

Illustration of the drawings: 1. a top cover body; 11. a first annular positioning groove; 12. a second annular positioning groove; 101. a through hole; 2. plastic is discharged; 201. an annular seal portion; 2011. a first positioning portion; 2012. a second positioning portion; 202. positioning the projection; 203. an annular clamp groove; 204. an extension seal portion; 3. a first pole column; 301. a positioning groove; 31. a pole body; 32. a current collecting plate; 4. and a second pole.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the embodiments described below are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. It should be noted that when one component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

Example one

The embodiment of the utility model provides a battery top cap forms the annular seal portion 201 that is used for space between seal cap body 1 and the first utmost point post 3 on plastic 2 down, and the battery top cap need not to adopt the sealing washer, has effectively simplified battery top cap's structure, and has reduced battery top cap's manufacturing cost.

Referring to fig. 1 to 5, the battery top cover includes a top cover body 1, a lower plastic 2 and a first terminal post 3. The first terminal 3 may be a positive terminal or a negative terminal.

The top cover body 1 is formed with a through hole 101, the first pole 3 is mounted in the through hole 101, and the lower plastic 2 is provided with an annular sealing part 201 for sealing a gap between the first pole 3 and the through hole 101.

In this embodiment, through be provided with annular seal portion 201 on plastic 2 down in order to seal the clearance between first utmost point post 3 and the top cap body 1, effectively simplified battery top cap's structure, and new battery top cap structure need not to adopt the sealing washer, has simplified the assembly step, is favorable to having reduced battery top cap's manufacturing cost.

It should be added that the lower plastic 2 in the present application is directly injection molded on the top cover body 1, so that the sealing effect of the annular sealing portion 201 is better, and the air tightness of the battery top cover is effectively improved.

In one embodiment, the lower plastic 2 is formed on the top cover body 1 by an injection molding process. It should be noted that, top cap body 1 integrated into one piece, then carry out surface treatment and clean top cap body 1's surface to top cap body 1, then pack top cap body 1 and first utmost point post into forming die's die cavity, at last closed die cavity and pour into the plastic in to the die cavity so that plastic 2 directly formed on top cap body 1 down. The annular sealing portion 201 penetrates through the through hole 101 from the top of the top cap body 1 and extends to the top of the top cap body 1. Compare current last plastic, the split type setting of lower plastic, 2 integrated into one piece of lower plastic in this scheme, and the annular seal portion 201 cover is established on first utmost point post 3, and sealed effect is better. In addition, an explosion-proof valve can be mounted on the top cover body 1 according to actual conditions.

In a specific embodiment, the second pole post 4 is formed on the top cover body 1, and the second pole post 4 and the top cover body 1 are integrally formed in a stamping mode. It should be added that the second pole post 4 is formed by direct punch forming, so that the installation of the battery top cover is further simplified, and the production efficiency of the battery top cover is further improved.

In a specific embodiment, a positioning groove 301 is provided on the first pole 3, and a positioning protrusion 202 is provided on the annular sealing portion 201 corresponding to the positioning groove 301 to fix the first pole 3. The shape of the positioning protrusion 202 is matched with that of the positioning groove 301, so that relative fixation between the first pole 3 and the annular sealing part 201 is realized, the annular sealing part 201 is further provided with an annular clamping groove 203 for clamping the top cover body 1, and part of the top cover body 1 is embedded into the annular clamping groove 203, so that relative fixation between the top cover body 1 and the annular sealing part 201 is realized.

Preferably, the top cap body 1 is provided with a first annular positioning groove 11 and a second annular positioning groove 12 at two ends of the through hole 101, respectively, and the annular sealing portion 201 has a first positioning portion 2011 matching the first annular positioning groove 11 and a second positioning portion 2012 matching the second annular positioning groove 12.

Through the cooperation installation of first location portion 2011 and first annular positioning groove 11 to and the cooperation installation between second location portion 2012 and the second annular positioning groove 12, effectively prevent down that plastic 2 breaks away from top cap body 1, promoted battery top cap's structural stability.

Preferably, the first annular positioning groove 11 and the second annular positioning groove 12 are both rectangular. Can realize the location like this when plastic 2 installs to top cap body 1 down, prevent to produce relative rotation down between plastic 2 and the top cap body 1.

Preferably, still be provided with explosion-proof valve on the top cap body 1, lower plastic 2 is provided with the air outlet groove that runs through corresponding explosion-proof valve. The lower plastic 2 formed by injection molding is provided with an air outlet groove, so that air can be discharged from the air outlet groove and the explosion-proof valve when the air pressure in the power battery is too high, and the safety of the power battery is ensured.

In a specific embodiment, along the thickness direction of the top cap body 1, the annular sealing part 201 penetrates through the through hole 101 from bottom to top, and the top of the annular sealing part 201 extends out of an extending sealing part 204 which is abutted against the top surface of the top cap body 1; the lower plastic 2 is integrally formed. Here, the thickness direction of the roof body 1 refers to a direction in which the roof body 1 is perpendicular to the top surface of the roof body 1, that is, the thickness of the roof body 1 is H in fig. 5.

Preferably, first utmost point post 3 includes utmost point post body 31 and with utmost point post body 31 fixed connection's current collector dish 32, the mounting groove has been seted up to lower plastic 2, current collector dish 32 inlays and locates the mounting groove, makes current collector dish 32 be fixed in down on the plastic 2, has further promoted first utmost point post 3's installation stability.

Optionally, the lower plastic 2 is provided with a hollow hole corresponding to the second pole 4, so that the tab of the battery cell can be connected to the second pole 4 through the hollow hole.

Example two

The embodiment discloses a power battery, which comprises a casing, a battery core and a battery top cover as in the first embodiment, wherein the casing is provided with an opening, the battery core is accommodated in the casing, and the battery top cover is fixed on the casing to seal the battery core in the casing.

The above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A battery top cover is characterized by comprising a top cover body (1), lower plastic (2) and a first pole column (3);

be formed with through hole (101) on top cap body (1), install in through hole (101) first utmost point post (3), plastic (2) have down and are used for sealing first utmost point post (3) with annular sealing portion (201) in the clearance between through hole (101).

2. The battery top cap of claim 1, wherein the lower plastic (2) is injection molded onto the top cap body (1).

3. The battery top cap according to claim 1, wherein the top cap body (1) is formed with a second pole (4), and the second pole (4) and the top cap body (1) are integrally formed by stamping.

4. The battery top cover according to claim 1, wherein a positioning groove (301) is arranged on the first pole post (3), and a positioning protrusion (202) is arranged on the annular sealing part (201) corresponding to the positioning groove (301) to fix the first pole post (3);

the annular sealing part (201) is further provided with an annular clamping groove (203) used for clamping the top cover body (1).

5. The battery top cap according to claim 1, wherein the top cap body (1) is provided with a first annular positioning groove (11) and a second annular positioning groove (12) at both ends of the through hole (101), respectively, and the annular sealing part (201) has a first positioning portion (2011) matching the first annular positioning groove (11) and a second positioning portion (2012) matching the second annular positioning groove (12).

6. The battery top cap of claim 5, wherein the first annular detent (11) and the second annular detent (12) are each rectangular.

7. The battery top cap according to claim 1, wherein the annular sealing part (201) penetrates through the through hole (101) from bottom to top along the thickness direction of the top cap body (1), and the top of the annular sealing part (201) extends out of an extension sealing part (204) which is abutted against the top surface of the top cap body (1);

the lower plastic (2) is integrally formed.

8. The battery top cap according to claim 1, characterized in that, the first pole (3) comprises a pole body (31) and a current collecting disc (32) fixedly connected with the pole body (31), the lower plastic (2) is provided with an installation groove, and the current collecting disc (32) is embedded in the installation groove.

9. The battery top cap according to claim 3, wherein the lower plastic (2) is provided with a hollow hole corresponding to the second pole (4).

10. A power cell, comprising:

a housing provided with an opening;

the battery cell is accommodated in the shell;

the battery top cap of any of claims 1-9, wherein the battery top cap is secured to the opening for enclosing the cell within the housing.