CN201623224U

CN201623224U - Lithium ion power battery

Info

Publication number: CN201623224U
Application number: CN2009201908390U
Authority: CN
Inventors: 闻人红雁; 王家泳; 王为希; 毛松科; 孔建锋
Original assignee: Zhejiang Gbs Energy Co Ltd
Current assignee: Zhejiang Gbs Energy Co Ltd
Priority date: 2009-08-10
Filing date: 2009-08-10
Publication date: 2010-11-03
Anticipated expiration: 2019-08-10

Abstract

The utility model belongs to the making technical field of batteries of electric vehicles, in particular to a lithium ion power battery, which comprises a battery box shell, wherein an opening of the battery box shell is fixedly provided with a pressure cover, the pressure cover is provided with a liquid injection hole, the pressure cover is further provided with a safety valve, the safety valve covers the liquid injection hole, and a sealing ring is arranged between the pressure cover and the safety valve. The lithium ion power battery has the advantages that: 1, the sealing ring is added between the safety valve and the pressure cover, and the gas tightness is enhanced, when the internal air pressure of the battery reaches to a certain value, the safety valve is bounced, and the internal air pressure is leaked. 2, the wall of the safety valve is thinned, is easy to recover after heat-expansion and cold-contraction actions, therefore, even though being used in higher or lower temperature environment, the safety valve is not limited, thereby being capable of enlarging the use range of regions, and increasing the use safety. 3, a sealing ring is also added between a terminal post and the pressure cover, the sealing is enhanced, the battery is prevented from leaking power, and the use safety is increased.

Description

Lithium-ion-power cell

[technical field]

The utility model belongs to the manufacturing technology field of electric motor car lithium-ion-power cell, and particularly a kind of single head is drawn the lithium-ion-power cell of pole.

[background technology]

Electric motor car is the vehicles of light and fast, environmental protection, and along with the generally enhancing of social enviroment protection consciousness, electric motor car is more and more universal, and the electric motor car industry also is subjected to comprising the various circles of society ground support energetically of government department.

Battery is electric motor car " heart ", and the performance of battery directly influences the performance and the quality of electric motor car.The structure of existing battery, the sealing of its safety valve is poor, and fail safe is low; In addition, it is little to be suitable for territorial scope, if in high temperature or low temperature environment, after heat expansion or shrinkage, safety valve can be squeezed big, and because of safety valve is thicker, it restores comparatively difficulty, causes gas leakage, and its fail safe is low.

[summary of the invention]

The utility model discloses a kind of lithium-ion-power cell, solved the technical problem that there is hidden danger safe in utilization in existing battery case, the various lithium-ion-power cells of its suitable different capabilities.

For solving the problems of the technologies described above, technical solution adopted in the utility model is as follows: lithium-ion-power cell, comprise battery case shell, the opening part of battery case shell sets firmly pressure cover, described pressure cover has liquid injection hole, also establish safety valve on the pressure cover, described safety valve cover cap liquid injection hole is inserted a sealing ring between pressure cover and safety valve.

Described lithium-ion-power cell, the middle part of pressure cover are to convex, and liquid injection hole is opened in the interior protuberance of pressure cover, and interior protuberance forms cannelure one, is respectively interior ring, outer shroud inside and outside the cannelure, and the outer wall of interior ring forms a circle overhead kick thorn; Described safety valve is one-body molded by top board, sidewall and interior ring, and the medial surface of sidewall forms annular groove one, and interior ring is in the inside of safety valve, leaves the gap between interior ring and sidewall; The sidewall of safety valve stretches in the cannelure of pressure cover, and the interior ring of pressure cover stretches in the gap of safety valve, the overhead kick of ring thorn overlap joint in the annular groove of described safety valve sidewall and the pressure cover; Described sealing ring is inserted in the gap of safety valve, and is between the top board that encircles top and safety valve in the pressure cover.

Described lithium-ion-power cell, the middle part of pressure cover are to convex, and described liquid injection hole is opened in the interior protuberance of pressure cover, and interior protuberance forms cannelure one, is respectively interior ring, outer shroud inside and outside the cannelure, and the outer wall of interior ring forms annular groove one; Safety valve is one-body molded by top board, sidewall and interior ring, and the medial surface of sidewall forms a circle overhead kick thorn, and interior ring is in the inside of safety valve, leaves the gap between interior ring and sidewall; The sidewall of safety valve stretches in the cannelure of pressure cover, and the interior ring of pressure cover stretches in the gap of safety valve, the annular groove of ring overlap joint in the overhead kick thorn of described safety valve sidewall and the pressure cover; Described sealing ring is inserted in the gap of safety valve, and is between the top board that encircles top and safety valve in the pressure cover.

Described lithium-ion-power cell is provided with two poles on the pressure cover, pole forms the spill annular groove with the contact site of pressure cover, is inserted in sealing ring in this spill annular groove.

The utility model lithium-ion-power cell has the following advantages:

1, installs sealing ring additional between safety valve and pressure cover, strengthened air-tightness.When inside battery air pressure reached certain value, safety valve can be flicked, and air pressure inside is released.

2, the wall thickness attenuation of safety valve, when after heat expansion or shrinkage effect, it restores easily, and is also unrestricted even be applied in the environment of higher temperatures or lower temperature like this, thereby can enlarge the region scope of application, has improved the fail safe of using.

3, also set up sealing ring between pole and pressure cover, strengthen sealing, prevent battery gas leakage, improve the fail safe of using.

[description of drawings]

Fig. 1 is a structural representation of the present utility model.

Fig. 2 is the A portion enlarged drawing of Fig. 1.

Fig. 3 is the enlarged drawing of the B portion safety valve of Fig. 2.

Fig. 4 is the enlarged drawing of the B portion pressure cover of Fig. 2.

[embodiment]

Below in conjunction with accompanying drawing the utility model is elaborated.

Shown in Fig. 1-4, a sealing of battery case shell 4, other end opening.Pressure cover 2 is fixedly arranged on the opening part of battery case shell 4, and the middle part of pressure cover 2 is to convex and have liquid injection hole 24, and protuberance forms cannelure 21 one, and ring 22, outer shroud 23 in being respectively inside and outside the cannelure 21, the outer wall of interior ring 22 form a circle overhead kick thorn 25.

Safety valve 1 is the bottle cap shape, and according to its cross section, one-body molded by top board 11, sidewall 12 and interior ring 13, the medial surface of sidewall 12 forms annular groove 14 one, the following inwall of annular groove 14 and the overhead kick of interior ring 22 thorn 25 overlap joints.Interior ring 13 is in the inside of safety valve 1, and with sidewall 12 concentrics, 12 of interior ring 13 and sidewalls leave gap 15, insert sealing ring 16 in the gap 15.

The sidewall 12 of safety valve 1 stretches in the cannelure 21 of pressure cover 2, and the interior ring 22 of pressure cover 2 stretches in the gap 15 of safety valve 1, and ring 22 tops and top board were 11 in sealing ring 16 was in.When inside battery air pressure reached certain pressure, air pressure inside jack-up safety valve was separated the phase clinch, and safety valve is flicked, thereby gas is discharged outside the housing, avoided taking place too greatly because of air pressure inside the danger of battery explosion.

Two poles 3 are set on the pressure cover 2, and the middle part of pole 3 promptly forms the spill annular groove with the contact site of pressure cover 2, is inserted in sealing ring 31 in this spill annular groove.

Certainly, the fit structure of safety valve in the foregoing description and pressure cover is exchanged, i.e. overhead kick thorn is located at safety valve, and annular groove is located at pressure cover, repeats no more.This structure also can form both overlap joint matching relationships, falls into protection range of the present utility model.

Claims

1. lithium-ion-power cell comprises battery case shell, and the opening part of battery case shell sets firmly pressure cover, described pressure cover has liquid injection hole, also establish safety valve on the pressure cover, described safety valve cover cap liquid injection hole is characterized in that: insert a sealing ring between described pressure cover and safety valve.

2. lithium-ion-power cell as claimed in claim 1, it is characterized in that: the middle part of described pressure cover is to convex, and described liquid injection hole is opened in the interior protuberance of pressure cover, and interior protuberance forms cannelure one, be respectively interior ring, outer shroud inside and outside the cannelure, the outer wall of interior ring forms a circle overhead kick thorn;

Described safety valve is one-body molded by top board, sidewall and interior ring, and the medial surface of sidewall forms annular groove one, and interior ring is in the inside of safety valve, leaves the gap between interior ring and sidewall; The sidewall of safety valve stretches in the cannelure of pressure cover, and the interior ring of pressure cover stretches in the gap of safety valve, the overhead kick of ring thorn overlap joint in the annular groove of described safety valve sidewall and the pressure cover; Described sealing ring is inserted in the gap of safety valve, and is between the top board that encircles top and safety valve in the pressure cover.

3. lithium-ion-power cell as claimed in claim 1, it is characterized in that: the middle part of described pressure cover is to convex, described liquid injection hole is opened in the interior protuberance of pressure cover, interior protuberance forms cannelure one, be respectively interior ring, outer shroud inside and outside the cannelure, the outer wall of interior ring forms annular groove one;

Described safety valve is one-body molded by top board, sidewall and interior ring, and the medial surface of sidewall forms a circle overhead kick thorn, and interior ring is in the inside of safety valve, leaves the gap between interior ring and sidewall; The sidewall of safety valve stretches in the cannelure of pressure cover, and the interior ring of pressure cover stretches in the gap of safety valve, the annular groove of ring overlap joint in the overhead kick thorn of described safety valve sidewall and the pressure cover; Described sealing ring is inserted in the gap of safety valve, and is between the top board that encircles top and safety valve in the pressure cover.

4. as each described lithium-ion-power cell of claim 1-3, it is characterized in that: two poles are set on the described pressure cover, and pole forms the spill annular groove with the contact site of pressure cover, is inserted in sealing ring in this spill annular groove.