CN103094510A

CN103094510A - Lithium ion battery with explosion-proof device and processing method thereof

Info

Publication number: CN103094510A
Application number: CN2011103422656A
Authority: CN
Inventors: 林俊颇; 林俊仰; 熊存强
Original assignee: Zhongshan Tianmao Battery Co Ltd
Current assignee: Zhongshan Tianmao Battery Co Ltd
Priority date: 2011-11-03
Filing date: 2011-11-03
Publication date: 2013-05-08

Abstract

The invention relates to a lithium ion battery with explosion-proof device and a processing method thereof. The lithium ion battery with explosion-proof device comprises a battery pole piece roll, a battery cover and a battery aluminum cover. The battery aluminum cover is provided with an elliptical explosion-proof block; edges of the upper and lower surface of the explosion-proof block are respectively provided with an annular groove depressed to the internal part of the battery aluminum cover, wherein the two annular grooves are in opposite position; the middle part of the annular groove is provided with an upward projected arched body; and the explosion-proof block and the battery aluminum cover are connected into an integration. The processing method of the lithium ion battery with explosion-proof device is as below: an upper die and a lower die are molded through punching on a battery cover plate material by 10 stations. Due to the explosion-proof block, when the internal pressure of the battery is too large, the arched bodies in the middle of the explosion-proof block will project gradually, or generate cracking for pressure relief, so as to play a role of explosion proof; and punching molding is conducted in a same mold by ten stations to complete shape distribution of punching, and deformation of the stamping is small; and the punched explosion-proof block has high size accuracy to ensure product quality.

Description

Lithium ion battery and processing method with explosion-protection equipment

Technical field

The present invention relates to a kind of lithium ion battery, particularly relate to a kind of lithium ion battery with explosion-protection equipment and processing method.

Summary of the invention

Lithium is that battery is divided into lithium battery and lithium ion battery.What mobile phone and notebook computer used at present is all lithium ion battery, and people's custom is called lithium battery usually, and the lithium ion battery energy density is large, and average output voltage is high.Self discharge is little, good battery, (can recover) below 2% per month, there is no memory effect, operating temperature range is wide is-20 ℃～60 ℃, but the superior fast charging and discharging of cycle performance, charge efficiency are up to 100%, and power output is large, long service life does not contain poisonous harmful substance, is called as green battery.But safety problem is the very important problem of lithium ion battery, although present most of lithium ion battery also has explosion-proof line all with the protective circuit of anti-short circuit.But in a lot of situations, this circuit not necessarily can work in all cases, and explosion-proof line energy role is also very limited.

Purpose of the present invention just is to provide a kind of lithium ion battery with explosion-protection equipment and processing method, adopts mechanical structure explosion-proof, uses safer.

For achieving the above object, the present invention adopts following technical scheme:

A kind of lithium ion battery with explosion-protection equipment, comprise: battery pole piece volume, battery case, battery aluminium lid, described battery aluminium lid is provided with oval-shaped anti-riot, the edge of the upper and lower surface of described anti-riot is respectively equipped with two cannelures that the position is corresponding to the inner recess of battery aluminium lid, the middle part of its cannelure is provided with ogive protruding upward, and anti-riot is connected as a single entity with the battery aluminium lid.

Thickness between cannelure corresponding to described two positions is between 0.09-0.12mm, and the thickness of ogive is between the 0.13-0.2 millimeter.

The top of described ogive is plane or arc surface.

A kind of processing method of the lithium ion battery with explosion-protection equipment, wherein anti-riot is divided 10 stations molded in battery cover plate upper punch by upper and lower mould, the first station: press location hole in battery plate upper punch; The second station: press spacer holes in battery plate upper punch; The 3rd station: at the upper and lower surface of battery plate with two grooves of the punch synchronous punching press on mould; The 4th station: continue to use than two grooves of punch synchronous punching press on the mould of the 3rd station size expansion at the upper and lower surface of battery plate, groove is increased deepen; The 5th station: continue upper and lower surface at the battery plate with size than two grooves of punch synchronous punching press on the mould of the 4th station expansion, make groove further increase intensification; The 6th station: continue upper and lower surface at the battery plate with size than two grooves of punch synchronous punching press on the mould of the 5th station expansion, make the groove periphery sides along basic forming; The 7th station: punching press ogive; The 8th station: continue the punching press ogive, ogive broadening is increased, and near needed shape; The 9th station: continue the punching press ogive, make ogive and cannelure moulding; The tenth station: blanking.

The diel of described the first station to the ten stations is arranged on same mould bases, and each station is at a distance of the spacing of two battery cover material.

Described the first station to the ten stations alignment pin on mould in punching course penetrates in location hole locates.

Beneficial effect of the present invention: owing to being provided with explosion-proof block, excessive when cell internal pressure, the arch at anti-riot middle part can be protruded gradually, or explosion-proof is played in generation crack pressure release; Minute ten station stamping moulding on same mould are completed the distribution of shapes of punching press, rush the part distortion little, and anti-riot size and the precision of institute's punching press are higher, to guarantee product quality; On the plate of punching course battery cover, owing to being provided with location hole, making in the punching course of each station not can displacement, effectively guarantees stamping quality.

Description of drawings

Fig. 1 is the front view of the battery cover of one of them embodiment of the present invention.

Fig. 2 be Fig. 1 A-A to cutaway view.

Fig. 3 is the rearview of Fig. 1.

Fig. 4 be Fig. 1 B-B to cutaway view.

Fig. 5 is the local enlarged diagram at the C place of Fig. 2.

Fig. 6 is the local enlarged diagram at the D place of Fig. 4.

Fig. 7 is the schematic diagram of the battery flitch of the first station to the ten station stamping.

Fig. 8 is the generalized section of anti-riot mid-sectional on the battery flitch of the 3rd station to the nine station stamping.

Embodiment

As extremely shown in Figure 6 in Fig. 1, the present invention includes: battery pole piece volume, battery case, battery aluminium lid 2, the present embodiment is mobile phone battery cover, its lid is material, 0.8 millimeter of thickness, described battery aluminium lid is provided with oval-shaped anti-riot 1, and anti-riot 1 is to form by mould punching, therefore is connected as a single entity.The edge of the upper and lower surface of described anti-riot forms two

cannelures

11,12 that the position is corresponding to the inner recess of battery aluminium lid respectively, thickness between cannelure corresponding to two positions is between 0.09-0.12mm, because the position is corresponding, thickness between two cannelures bottom, up and down is reduced, so surpass the scope of setting, the pressure release of will breaking at the cannelure place when cell internal pressure.The middle part of cannelure is provided with ogive protruding upward 13, and the bottom of its ogive another side is groove 14 upwards, and the thickness of ogive is between the 0.13-0.2 millimeter, and the thickness of ogive can be consistent, thin centre, edge also can be set thick gradually.Ogive is set can make battery ogive when Pressure Overload-induced protrude to the lateral direction of battery, the Bearing degree that has exceeded ogive when pressure, just can break in the cannelure place, because the thickness of cannelure and ogive 13 is significantly less than battery case and battery cover, when inner pressure of battery exceeds certain scope, pressure release of explosion-proof block is so can avoid inner pressure of battery excessive and explode.

A kind of processing method of the lithium ion battery with explosion-protection equipment, the processing method of anti-riot wherein is different from existing processing method, and other technology is identical with existing technical scheme, no longer narrates at this.

To shown in Figure 8, wherein anti-riot is divided the punch forming on battery cover plate 15 of 10 stations by upper and lower mould as Fig. 7: the first station 1 ': at the both sides of battery plate punching press location hole 19; The second station 2 ': press spacer holes in battery plate upper punch; The 3rd station 3 ': at the upper and lower surface of battery plate with two grooves of the punch synchronous punching press on mould; The 4th station 4 ': continue to use than two grooves of punch synchronous punching press on the mould of the 3rd station size expansion at the upper and lower surface of battery plate, groove is increased deepen; The 5th station 5 ': continue upper and lower surface at the battery plate with size than two grooves of punch synchronous punching press on the mould of the 4th station expansion, make groove further increase intensification; The 6th station 6 ': continue upper and lower surface at the battery plate with size than two grooves of punch synchronous punching press on the mould of the 5th station expansion, make the groove periphery sides along basic forming; The 7th station 7 ': the punching press ogive; The 8th station 8 ': continue the punching press ogive, ogive broadening is increased, and near needed shape; The 9th station 9 ': continue the punching press ogive, make ogive and cannelure moulding; The tenth station 10 ': blanking.After blanking, leftover pieces 20 progressively transfer out, and punching press has battery cover 2 blankings of anti-riot 13 in collecting box.

The diel of described the first station to the ten stations is arranged on same mould bases, and each station is at a distance of two

battery cover material

16,17 spacing.

Described the first station to the ten stations one group of alignment pin on mould in punching course penetrates respectively location in one group of location hole 19, and location hole is separately positioned on the both sides of battery flitch.

Claims

1. lithium ion battery with explosion-protection equipment, comprise: battery pole piece volume, battery case, battery aluminium lid, it is characterized in that: described battery aluminium lid is provided with oval-shaped anti-riot, the edge of the upper and lower surface of described anti-riot is respectively equipped with two cannelures that the position is corresponding to the inner recess of battery aluminium lid, the middle part of its cannelure is provided with ogive protruding upward, and anti-riot is connected as a single entity with the battery aluminium lid.

2. a kind of lithium ion battery with explosion-protection equipment according to claim 1 is characterized in that: the thickness between cannelure corresponding to described two positions is between 0.09-0.12mm, and the thickness of ogive is between the 0.13-0.2 millimeter.

3. a kind of lithium ion battery with explosion-protection equipment according to claim 1, it is characterized in that: the top of described ogive is plane or arc surface.

4. processing method with the lithium ion battery of explosion-protection equipment, it is characterized in that: anti-riot is divided 10 stations molded in battery cover plate upper punch by upper and lower mould, the first station: press location hole in battery plate upper punch; The second station: press spacer holes in battery plate upper punch; The 3rd station: at the upper and lower surface of battery plate with two grooves of the punch synchronous punching press on mould; The 4th station: continue to use than two grooves of punch synchronous punching press on the mould of the 3rd station size expansion at the upper and lower surface of battery plate, groove is increased deepen; The 5th station: continue upper and lower surface at the battery plate with size than two grooves of punch synchronous punching press on the mould of the 4th station expansion, make groove further increase intensification; The 6th station: continue upper and lower surface at the battery plate with size than two grooves of punch synchronous punching press on the mould of the 5th station expansion, make the groove periphery sides along basic forming; The 7th station: punching press ogive; The 8th station: continue the punching press ogive, ogive broadening is increased, and near needed shape; The 9th station: continue the punching press ogive, make ogive and cannelure moulding; The tenth station: blanking.

5. the processing method of a kind of lithium ion battery with explosion-protection equipment according to claim 4, it is characterized in that: the diel of described the first station to the ten stations is arranged on same mould bases, and each station is at a distance of the spacing of two battery cover material.

6. the processing method of a kind of lithium ion battery with explosion-protection equipment according to claim 4, it is characterized in that: described the first station to the ten stations alignment pin on mould in punching course penetrates in location hole locates.