CN219203320U

CN219203320U - Power battery shell, power battery and battery module

Info

Publication number: CN219203320U
Application number: CN202320039420.5U
Authority: CN
Inventors: 黄同强; 王明; 唐晓枫
Original assignee: Shenzhen Ansen Electronic Technology Co ltd
Current assignee: Shenzhen Ansen Electronic Technology Co ltd
Priority date: 2023-01-08
Filing date: 2023-01-08
Publication date: 2023-06-16
Anticipated expiration: 2033-01-08

Abstract

The utility model discloses a power battery shell, a power battery and a battery module, which comprise a battery shell body, wherein a fixing seat is integrally formed on the surface of the battery shell body, and a cavity is formed in the fixing seat. The utility model discloses set up fixing base, end cover, cavity, closing plate and sealing plug on the surface of annotating the liquid hole, can be through sealing plug and closing plate to annotate the inside leakproofness of liquid hole and cavity and increase, simultaneously can make the sealing plug and annotate the friction between the liquid hole through the coupling assembling between closing plate and the end cover and increase, thereby further increase the leakproofness of annotating the liquid hole, and cooperation first sealing washer and second sealing washer, and threaded connection carries out seal protection to annotating the liquid hole once more at the end cover of fixing base surface, prevent that a certain part from ageing and leading to holistic leakproofness to descend, so that power battery's normal use.

Description

Power battery shell, power battery and battery module

Technical Field

The utility model relates to the technical field of power batteries, in particular to a power battery shell, a power battery and a battery module.

Background

Along with the development of science and technology, the power battery is widely applied to the fields of electric tools, electric automobiles and the like;

the prior art discloses a power battery shell, a power battery and a battery module (publication number: CN 214848968U), wherein the power battery shell is used for wrapping a core pack, the core pack comprises a positive lug and a negative lug, the power battery shell comprises a shell body and an end cover, and the shell body comprises a side wall and a bottom plate. The utility model can not damage the core bag when the power battery is filled with liquid, and the potential safety hazard is not easy to generate after the liquid is filled, and the power battery has the advantages of small potential safety hazard, long service life, good safety of the battery module and long service life by arranging the power battery shell;

although the technical scheme solves the problem that electrolyte overflows to cause corrosion of the end cover, the sealing effect of the method is poor because the sealing is realized only through the buffer pad at the threaded part between the liquid injection hole and the plugging piece, and the situation of liquid leakage can occur when the buffer pad is aged and deformed, so that the normal use of the power battery is inconvenient.

Disclosure of Invention

The utility model aims to provide a power battery shell, a power battery and a battery module, wherein the sealing performance is reduced due to the fact that a connecting component, a sealing plate, a sealing plug, a first sealing ring and a second sealing ring are matched together, and the problems in the prior art are solved.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a power battery casing, includes the battery casing body, the surface integrated into one piece of battery casing body has the fixing base, the cavity has been seted up to the inside of fixing base, the liquid injection hole has been seted up on the surface of battery casing body, the liquid injection hole communicates in the external world through the cavity, the end cover is detachably installed on the surface of fixing base, the inside of cavity is provided with the closing plate, be provided with coupling assembling between closing plate and the end cover;

the connecting assembly comprises a threaded rod, a spring and a knob, wherein the threaded rod is rotationally connected to the central part of the sealing plate, one end of the threaded rod penetrates through the surface of the end cover and extends to the outside, the knob is assembled at one end of the threaded rod, the threaded rod is in threaded connection with the end cover, the spring is installed between the end cover and the sealing plate, and the surface of the spring is in contact with the inner wall of the cavity.

Preferably, a first sealing ring is arranged between the sealing plate and the cavity, a sealing plug is fixedly arranged on the surface of the sealing plate, and the sealing plug is inserted into the liquid injection hole.

Preferably, the first sealing ring is sleeved on the surface of the sealing plug, a second sealing ring is installed between the end cover and the fixing seat, and the second sealing ring is sleeved on the surface of the spring.

Preferably, the end cover is arranged to be of an internal thread structure, the fixing seat is arranged to be of an external thread structure, and the end cover is in threaded connection with the surface of the fixing seat.

Preferably, the liquid injection hole is provided with a conical portion and a round hole portion, the sealing plug is provided with a round table portion and a cylindrical portion, the round table portion is inserted into the conical portion, and the cylindrical portion is clamped into the round hole portion.

Preferably, the surface integrated into one piece of sealing plug has three sets of hem, and three sets of the surface of hem all contacts with the inner wall of round hole portion, and three sets of hem equidistance distributes on the surface of cylinder portion.

Preferably, the liquid injection hole, the cavity, the fixing seat, the first sealing ring, the second sealing ring, the end cover, the sealing plate and the threaded rod are all arranged concentrically.

Preferably, the battery shell body and the fixing seat are made of aluminum alloy materials, and the sealing plug is made of silica gel materials.

The utility model provides a power battery, includes a power battery casing, still includes protective housing and top cap, its characterized in that: the top and the bottom of battery housing body have set up anodal ear and negative pole ear respectively, the inside of protecting crust is provided with bottom connecting plate and top connecting plate, the surface mounting of top cap has anodal terminal and negative pole terminal, the surface of bottom connecting plate and top connecting plate all is provided with the contact, the contact on bottom connecting plate surface links to each other with negative pole terminal through the winding displacement, the contact on top connecting plate surface links to each other with anodal terminal through the winding displacement, anodal ear contacts with the contact on top connecting plate surface, the negative pole ear contacts with the contact on bottom connecting plate surface, the top cap passes through the screw rigid coupling in the top of protecting crust.

A battery module includes a plurality of power cells.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model discloses set up fixing base, end cover, cavity, closing plate and sealing plug on the surface of annotating the liquid hole, can be through sealing plug and closing plate to annotate the inside leakproofness of liquid hole and cavity and increase, simultaneously can make the sealing plug and annotate the friction between the liquid hole through the coupling assembling between closing plate and the end cover and increase, thereby further increase the leakproofness of annotating the liquid hole, and cooperation first sealing washer and second sealing washer, and threaded connection carries out seal protection to annotating the liquid hole once more at the end cover of fixing base surface, prevent that a certain part from ageing and leading to holistic leakproofness to descend, so that power battery's normal use.

Drawings

FIG. 1 is a schematic view of a connection structure between a battery case body and an end cap according to the present utility model;

FIG. 2 is a schematic view of the internal structure of the protective shell according to the present utility model;

FIG. 3 is a schematic diagram of the main structure of the protective shell of the present utility model;

fig. 4 is a schematic main structure of the sealing plug of the present utility model.

In the figure: 1. a battery case body; 2. a liquid injection hole; 3. a sealing plug; 4. a first seal ring; 5. an end cap; 6. a second seal ring; 7. a knob; 8. a threaded rod; 9. a spring; 10. a fixing seat; 11. a cavity; 12. a bottom connecting plate; 13. a protective shell; 14. a top connection plate; 15. a positive electrode terminal; 16. a top cover; 17. a negative electrode terminal; 18. a flat cable; 19. folding edges; 20. and (5) sealing the plate.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1 to 4, the present utility model provides a technical solution: a power battery housing;

the battery comprises a battery shell body 1, a fixing seat 10 is integrally formed on the surface of the battery shell body 1, a cavity 11 is formed in the fixing seat 10, a liquid injection hole 2 is formed in the surface of the battery shell body 1, the liquid injection hole 2 is communicated with the outside through the cavity 11, an end cover 5 is detachably arranged on the surface of the fixing seat 10, a sealing plate 20 is arranged in the cavity 11, and a connecting component is arranged between the sealing plate 20 and the end cover 5;

the connecting assembly comprises a threaded rod 8, a spring 9 and a knob 7, wherein the threaded rod 8 is rotationally connected to the central part of the sealing plate 20, one end of the threaded rod 8 penetrates through the surface of the end cover 5 and extends to the outside, the knob 7 is assembled at one end of the threaded rod 8, the threaded rod 8 is in threaded connection with the end cover 5, the spring 9 is installed between the end cover 5 and the sealing plate 20, and the surface of the spring 9 is in contact with the inner wall of the cavity 11;

as an optimization scheme of the utility model, a first sealing ring 4 is arranged between a sealing plate 20 and a cavity 11, a sealing plug 3 is fixedly arranged on the surface of the sealing plate 20, the sealing plug 3 is inserted into a liquid injection hole 2, the first sealing ring 4 is sleeved on the surface of the sealing plug 3, a second sealing ring 6 is arranged between an end cover 5 and a fixed seat 10, the second sealing ring 6 is sleeved on the surface of a spring 9, and the tightness of the liquid injection hole 2 is increased together through the cooperation of the first sealing ring 4 and the second sealing ring 6;

as an optimization scheme of the utility model, the end cover 5 is provided with an internal thread structure, the fixed seat 10 is provided with an external thread structure, the end cover 5 is connected with the surface of the fixed seat 10 in a threaded manner, and the connection between the end cover 5 and the fixed seat 10 is realized in a threaded connection manner, so that the end cover 5 can be conveniently detached and electrolyte is injected through the electrolyte injection hole 2;

as an optimization scheme of the utility model, the liquid injection hole 2 is arranged into a conical part and a round hole part, the sealing plug 3 is arranged into a round table part and a cylindrical part, the round table part is inserted into the conical part, the cylindrical part is clamped into the round hole part, three groups of folded edges 19 are integrally formed on the surface of the sealing plug 3, the surfaces of the three groups of folded edges 19 are contacted with the inner wall of the round hole part, the three groups of folded edges 19 are equidistantly distributed on the surface of the cylindrical part, and the arrangement of the folded edges 19 can seal and protect a gap between the sealing plug 3 and the liquid injection hole 2;

as an optimization scheme of the utility model, the liquid injection hole 2, the cavity 11, the fixing seat 10, the first sealing ring 4, the second sealing ring 6, the end cover 5, the sealing plate 20 and the threaded rod 8 are all concentrically arranged;

as an optimization scheme of the utility model, the battery shell body 1 and the fixing seat 10 are made of aluminum alloy materials, the sealing plug 3 is made of silica gel materials, and the aluminum alloy is low in density, so that the total weight of the power battery is reduced, and the energy density of the power battery is improved.

The utility model also provides a power battery, which comprises a protective shell 13 and a top cover 16, wherein the top and the bottom of the battery shell body 1 are respectively provided with a positive lug and a negative lug, the interior of the protective shell 13 is provided with a bottom connecting plate 12 and a top connecting plate 14, the surface of the top cover 16 is provided with a positive terminal 15 and a negative terminal 17, the surfaces of the bottom connecting plate 12 and the top connecting plate 14 are respectively provided with a contact, the contacts on the surface of the bottom connecting plate 12 are connected with the negative terminal 17 through a flat cable 18, the contacts on the surface of the top connecting plate 14 are connected with the positive terminal 15 through the flat cable 18, the positive lug is contacted with the contacts on the surface of the top connecting plate 14, the negative lug is contacted with the contacts on the surface of the bottom connecting plate 12, and the top cover 16 is fixedly connected with the top of the protective shell 13 through screws, wherein one battery module comprises a plurality of power batteries.

During the use, cup joint second sealing washer 6 at the surface of spring 9, cup joint first sealing washer 4 at the surface of sealing plug 3, then rotate end cover 5, with end cover 5 threaded connection at the surface of fixing base 10, the junction of fixing base 10 and end cover 5 can carry out seal protection through second sealing washer 6 this moment, then rotate knob 7, drive threaded rod 8 through knob 7 and rotate, can be in cavity 11's inside rectilinear movement when threaded rod 8 rotates, can drive sealing plug 3 through closing plate 20 when threaded rod 8 moves and move towards annotating liquid hole 2 inside, and can extrude first sealing washer 4 through closing plate 20, and then carry out seal protection to annotating liquid hole 2 through first sealing washer 4 and sealing plug 3.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A power battery housing, characterized by: the battery pack comprises a battery shell body (1), wherein a fixing seat (10) is integrally formed on the surface of the battery shell body (1), a cavity (11) is formed in the fixing seat (10), a liquid injection hole (2) is formed in the surface of the battery shell body (1), the liquid injection hole (2) is communicated with the outside through the cavity (11), an end cover (5) is detachably arranged on the surface of the fixing seat (10), a sealing plate (20) is arranged in the cavity (11), and a connecting component is arranged between the sealing plate (20) and the end cover (5);

the connecting assembly comprises a threaded rod (8), a spring (9) and a knob (7), wherein the threaded rod (8) is rotationally connected to the central part of the sealing plate (20), one end of the threaded rod (8) penetrates through the surface of the end cover (5) and extends to the outside, the knob (7) is assembled at one end of the threaded rod (8), the threaded rod (8) is in threaded connection with the end cover (5), the spring (9) is installed between the end cover (5) and the sealing plate (20), and the surface of the spring (9) is in contact with the inner wall of the cavity (11).

2. A power cell housing as claimed in claim 1, wherein: a first sealing ring (4) is arranged between the sealing plate (20) and the cavity (11), a sealing plug (3) is fixedly arranged on the surface of the sealing plate (20), and the sealing plug (3) is inserted into the liquid injection hole (2).

3. A power cell housing as claimed in claim 2, wherein: the first sealing ring (4) is sleeved on the surface of the sealing plug (3), a second sealing ring (6) is arranged between the end cover (5) and the fixing seat (10), and the second sealing ring (6) is sleeved on the surface of the spring (9).

4. A power cell housing according to claim 3, wherein: the end cover (5) is of an internal thread structure, the fixing seat (10) is of an external thread structure, and the end cover (5) is in threaded connection with the surface of the fixing seat (10).

5. A power cell housing as claimed in claim 4, wherein: the liquid injection hole (2) is arranged to be a conical portion and a round hole portion, the sealing plug (3) is arranged to be a round table portion and a cylindrical portion, the round table portion is inserted into the conical portion, and the cylindrical portion is clamped into the round hole portion.

6. A power cell housing as claimed in claim 5, wherein: three groups of folds (19) are integrally formed on the surface of the sealing plug (3), the surfaces of the three groups of folds (19) are contacted with the inner wall of the round hole part, and the three groups of folds (19) are equidistantly distributed on the surface of the cylindrical part.

7. A power cell housing as claimed in claim 6, wherein: the liquid injection hole (2), the cavity (11), the fixing seat (10), the first sealing ring (4), the second sealing ring (6), the end cover (5), the sealing plate (20) and the threaded rod (8) are concentrically arranged.

8. A power cell housing as claimed in claim 6, wherein: the battery shell body (1) and the fixing seat (10) are made of aluminum alloy materials, and the sealing plug (3) is made of silica gel materials.

9. A power cell comprising a power cell housing according to any one of claims 1-8, further comprising a protective casing (13) and a top cover (16), characterized in that: the battery shell comprises a battery shell body (1), wherein the top and the bottom of the battery shell body (1) are respectively provided with a positive electrode lug and a negative electrode lug, a bottom connecting plate (12) and a top connecting plate (14) are arranged in the protective shell (13), the surface of a top cover (16) is provided with a positive electrode terminal (15) and a negative electrode terminal (17), the surfaces of the bottom connecting plate (12) and the top connecting plate (14) are respectively provided with a contact, the contacts on the surface of the bottom connecting plate (12) are connected with the negative electrode terminal (17) through a flat cable (18), the contacts on the surface of the top connecting plate (14) are connected with the positive electrode terminal (15) through the flat cable (18), the positive electrode lugs are in contact with the contacts on the surface of the top connecting plate (14), and the negative electrode lugs are in contact with the contacts on the surface of the bottom connecting plate (12), and the top cover (16) is fixedly connected to the top of the protective shell (13) through screws.

10. A battery module, characterized in that: a power cell comprising a plurality of the power cells of claim 9.