CN201804923U

CN201804923U - Power battery cover plate with explosionproof device

Info

Publication number: CN201804923U
Application number: CN201020187183XU
Authority: CN
Inventors: 倪志华
Original assignee: SHANDONG SHENGONG HONGQUAN MOULD CO Ltd
Current assignee: SHANDONG SHENGONG HONGQUAN MOULD CO Ltd
Priority date: 2010-05-04
Filing date: 2010-05-04
Publication date: 2011-04-20
Anticipated expiration: 2020-05-04

Abstract

A power battery cover plate with an explosionproof device, which can repeatedly exhaust and relieve pressure for a battery, and comprises a cover plate, wherein a liquid injecting hole is formed at one corner of the cover plate; two through holes are formed at two ends of the cover plate; an anode and a cathode are respectively mounted in the through holes and respectively comprise poles; insulating pieces are connected between the poles and the cover plate; the poles on the cover plates are connected with a nut and a gasket; the pole below the cover plate is fixedly connected with a rotation-stopping fixing plate through a bolt; a pressure-relief hole is formed in the middle of the cover plate; an explosionproof device main body is in airtight connection with the pressure-relief hole; the upper part of the explosionproof device main body is in threaded connection with an exhaust cover; a pressure relief cavity is formed in the middle of the explosionproof device main body; a limiting platform is connected with the inside of the pressure relief cavity; a sealing ring is arranged in the pressure relief cavity on the limiting platform; a sealing ball is arranged on the sealing ring; a spring is arranged on the sealing ball; the upper end of the spring is supported against the lower part of the top wall of the exhaust cover; and an exhaust hole is formed on the top wall of the exhaust cover. The explosionproof device main body is in airtight connection with the cover plate through an insulation spacer.

Description

The electrokinetic cell cover plate that has explosion-protection equipment

Technical field

The utility model relates to a kind of battery cover board, relates in particular to a kind of electrokinetic cell cover plate that has explosion-protection equipment.

Background technology

Nowadays, the power ion battery is promoted in new energy development very much, and along with popularizing gradually of electric bicycle, electric automobile, the capacity of lithium battery also progressively rises to 5Ah, 10Ah, 20Ah, 40Ah, 50Ah by original 1Ah (battery for mobile phone).In the production process of battery, because inside battery generation chemical reaction, air pressure in the battery can raise, just need exhaust pressure relief when air pressure reaches certain value, the pressure release exhaust mode of original battery is very simple, is exactly to dash a relief hole in the middle of cover plate, then at relief hole place welding one deck rupture pressure disc (referring to Fig. 5), battery cover board all can not re-use after this rupture pressure disc was broken through by air-flow, that is to say that this piece battery scraps, and can't use.Because the increase of battery capacity, battery case, cover plate and electric core all will increase accordingly, and production cost of cells is also just corresponding to be improved, and existing explosion-proof mode is very uneconomical for battery capacious.

Summary of the invention

The purpose of this utility model provides a kind of electrokinetic cell cover plate that has explosion-protection equipment that can repeat exhaust pressure relief to battery.

For achieving the above object, the technical solution adopted in the utility model is:

A kind of electrokinetic cell cover plate that has explosion-protection equipment, comprise cover plate, cover plate has liquid injection hole for one jiao, the cover plate two ends have two through holes, be separately installed with positive level and negative pole in the through hole, positive level and negative pole have included pole, be connected with insulating trip between pole and the cover plate, be connected with nut and pad on the pole above the cover plate, be fixedly connected with the spline fixed head by connecting bolt on the pole below the cover plate, it is characterized in that: have relief hole in the middle of the cover plate, the airtight explosion-protection equipment main body that is connected with in relief hole place, the exhaust that has been threaded above explosion-protection equipment main body block has pressure-releasing chamber in the middle of the explosion-protection equipment main body, be connected with limiting stand in the pressure-releasing chamber, be provided with sealing ring in the pressure-releasing chamber above the limiting stand, be provided with ball sealer above the sealing ring, be provided with spring above the ball sealer, the spring upper end withstands on below the described exhaust cap crown wall, has steam vent on the exhaust cap crown wall.

According to the described electrokinetic cell cover plate that has explosion-protection equipment, it is characterized in that: be connected by insulation spacer is airtight between described explosion-protection equipment main body and the cover plate.

The utility model can be to the pressure release of battery automatic vent under the effect of spring force, simple in structure, easy assembling, and can repeat exhaust pressure relief.

Description of drawings

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

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the upward view of Fig. 1;

Fig. 4 is the structural representation of explosion-protection equipment in the utility model;

Fig. 5 is the structural representation of existing battery cover board.

In the accompanying drawing:

1, cover plate; 2, pole; 3, nut; 4, pad; 5, insulating trip; 6, spline fixed head; 7, connecting bolt; 8, exhaust block; 9, insulation spacer; 10, spring; 11, ball sealer; 12, sealing ring; 13, explosion-protection equipment main body; 14, steam vent; 15, liquid injection hole; 16, rupture pressure disc; 17, limiting stand; 18, pressure-releasing chamber.

Embodiment

Below in conjunction with the drawings and specific embodiments the utility model is further described:

A kind of electrokinetic cell cover plate that has explosion-protection equipment, as Fig. 1, Fig. 2, shown in Figure 3, comprise cover plate 1, cover plate has liquid injection hole 15 for 1 one jiaos, cover plate 1 two ends have two through holes, be separately installed with positive level and negative pole in the through hole, positive level and negative pole have included pole 2, be connected with insulating trip 5 between pole 2 and the cover plate 1, be connected with nut 3 and pad 4 on the pole 2 above the cover plate 1, be fixedly connected with spline fixed head 6 by connecting bolt 7 on the pole 2 below the cover plate 1, have relief hole, the airtight explosion-protection equipment main body 13 (referring to Fig. 4) that is connected with in relief hole place in the middle of the cover plate 1, the exhaust that has been threaded above the explosion-protection equipment main body 13 block 8, have pressure-releasing chamber 18 in the middle of the explosion-protection equipment main body 13, be connected with limiting stand 17 in the pressure-releasing chamber 18, be provided with sealing ring 12 in the pressure-releasing chamber 18 above the limiting stand 17, be provided with ball sealer 11 above the sealing ring 12, be provided with spring 10 above the ball sealer 11, spring 10 upper ends withstand on described exhaust and block a shot below 8 roofs, and exhaust is blocked a shot and had steam vent 14 on 8 roofs.In the present embodiment, between quick-fried apparatus main body 13 and the cover plate 1 by 9 airtight connections of insulation spacer.

Shown in Figure 1 is a lithium battery cover plate, the positive pole that mainly comprises both sides, negative pole and middle explosion-protection equipment, just, negative pole structure is identical, all be to form by the hexagonal head screw transformation of the way, aluminum material just very, negative pole is a copper material, pole is made by plain bolt, passes cover plate, is provided with insulating trip between pole and cover plate, preventing that pole from contacting with cover plate is short-circuited, be with one deck pad on the pole above the insulating trip, one deck nut that has been threaded on the pole on this layer pad is used for connecting pole and cover plate, put one deck pad and nut above this layer nut again, be used for connecting outer lead.Explosion-protection equipment has the hexagonal head screw of steam vent by a centre and the hexagon-headed bolt of two counterbore develops, the exhaust block is formed by the hexagonal head screw transformation of the way, the center has steam vent, the explosion-protection equipment main body is a M10 hexagon-headed bolt through reprocessing, its head 2/5 part is processed as the M8 screw thread, be used to connect the exhaust block, have through hole in the middle of it, two counterbore, top counterbore bottom (being above the limiting stand) is placed with a sealing ring, be provided with a steel ball above the sealing ring, be ball sealer, be provided with a spring above the ball sealer, the spring upper end withstands on the exhaust block, spring is under the effect of exhaust block, ball sealer below it is exerted pressure, thereby, reach the effect of sealing ball sealer compression seal circle.When battery process prolonged application, the heat of internal electrical chemical reaction is through after overstocking for a long time, and air pressure inside can continue to raise, when atmospheric pressure surpassed the pressure of spring, ball sealer will be upspring, and inside battery air pressure is released, thereby keep air pressure balance, will guarantee that like this battery works on.

The utility model is designed and developed at 36130 electrokinetic cell shells, cooperates with battery container tightly, and cover plate has the liquid injection hole that diameter is 1.5mm for one jiao, and middle explosion-protection equipment is a buffer unit when injecting solution in the housing and blast.

The utility model is a kind of power lithium-ion battery cover plate, and the capacity that is specially adapted to is larger-size power ion battery more than 40Ah, its simple in structure, easy assembling, and explosion-protection equipment can reuse, and can guarantee safety in production.

The utility model integral body is package assembly, and is fixing by being threaded fully, do not have original rivet, has adjustability, can be according to the difference of bearing pressure, and the pressure of regulating spring, explosion-protection equipment can be recycled, and prolongs battery useful life.

Claims

1. electrokinetic cell cover plate that has explosion-protection equipment, comprise cover plate (1), cover plate has liquid injection hole (15) for (1) one jiao, cover plate (1) two ends have two through holes, be separately installed with positive level and negative pole in the through hole, positive level and negative pole have included pole (2), be connected with insulating trip (5) between pole (2) and the cover plate (1), be connected with nut (3) and pad (4) on the pole (2) above the cover plate (1), pole (2) below the cover plate (1) is gone up and is fixedly connected with spline fixed head (6) by connecting bolt (7), it is characterized in that: have relief hole in the middle of the cover plate (1), the airtight explosion-protection equipment main body (13) that is connected with in relief hole place, the exhaust that has been threaded above the explosion-protection equipment main body (13) block (8), have pressure-releasing chamber (18) in the middle of the explosion-protection equipment main body (13), be connected with limiting stand (17) in the pressure-releasing chamber (18), be provided with sealing ring (12) in the pressure-releasing chamber (18) above the limiting stand (17), be provided with ball sealer (11) above the sealing ring (12), be provided with spring (10) above the ball sealer (11), spring (10) upper end withstands on below described exhaust block (8) roof, has steam vent (14) on exhaust block (8) roof.

2. the electrokinetic cell cover plate that has explosion-protection equipment according to claim 1 is characterized in that: between described explosion-protection equipment main body (13) and the cover plate (1) by airtight connection of insulation spacer (9).