CN218602573U

CN218602573U - Lithium ion battery cover plate assembly

Info

Publication number: CN218602573U
Application number: CN202223001563.1U
Authority: CN
Inventors: 鲁鹏宇
Original assignee: Suzhou Jingtong Photoelectric Science & Technology Co ltd
Current assignee: Suzhou Jingtong Photoelectric Science & Technology Co ltd
Priority date: 2022-11-11
Filing date: 2022-11-11
Publication date: 2023-03-10
Anticipated expiration: 2032-11-11

Abstract

The utility model relates to a battery apron technical field specifically discloses a lithium ion battery apron subassembly, which comprises a base plate, insulation connection has anodal piece and negative pole piece on the base plate, penetrating shaping has notes liquid hole and explosion-proof hole on the base plate, the downthehole shutoff of notes liquid has sealed nail, explosion-proof downthehole welding has explosion-proof diaphragm, the insulation board is equipped with in the bottom subsides of base plate, the insulation board corresponds the position of annotating the liquid hole and is equipped with the through-hole, be connected with anodal fuse and negative pole fuse on the insulation board, anodal fuse passes through anodal rivet and is connected with anodal piece, the negative pole fuse passes through the negative pole rivet and is connected with the negative pole piece, the shaping has the depressed part on the insulation board, the shaping has a plurality of pressure release holes on the depressed part, the inner wall subsides of depressed part are equipped with the flexible glue piece, the flexible glue piece is fixed on the inner wall of depressed part, the flexible glue piece is attached in the inner wall of depressed part and the flexible glue piece just hides a plurality of pressure release holes, the novel structure can improve the security of battery.

Description

Lithium ion battery cover plate assembly

Technical Field

The utility model relates to a battery apron technical field especially relates to a lithium ion battery apron subassembly.

Background

Lithium ion battery can cause the battery to produce unusual gas because of factors such as charger trouble or excessively rechargeable for battery internal pressure is too big, thereby takes place the battery explosion accident, and light then damages equipment, and the user is injure to the weight.

In order to prevent the explosion caused by the over-high internal pressure of the battery, the gas in the battery must be discharged, the protection measures are usually to open an explosion-proof hole on the battery cover plate, an explosion-proof membrane is welded in the explosion-proof hole, when the battery is overcharged or short-circuited, the gas is generated in the battery, the gas pressure of the battery rises, and when the gas pressure exceeds the set pressure of the explosion-proof membrane, the explosion-proof membrane is broken, the gas in the battery is released, thereby reducing the explosion risk of the battery.

The existence of explosion-proof diaphragm can play fine explosion-proof effect to the lithium cell, but also has the defect, breaks the back when the explosion-proof membrane, and the battery is inside to switch on with the external world, and oxygen and moisture in the air get into the battery easily, cause electrified negative pole piece oxidation, make the battery temperature rise, have increased the thermal runaway risk of battery.

SUMMERY OF THE UTILITY MODEL

For solving the problem mentioned in the background art, the utility model aims to provide a lithium ion battery cover plate subassembly.

In order to realize the above object, the technical scheme of the utility model is that:

the utility model provides a lithium ion battery cover plate assembly, includes the base plate, the top insulation connection of base plate has anodal piece and negative pole piece, penetrating shaping has notes liquid hole and explosion-proof hole on the base plate, the downthehole shutoff of notes liquid has sealed nail, explosion-proof downthehole welding has explosion-proof diaphragm, the insulation board is equipped with in the bottom subsides of base plate, the insulation board corresponds the position shaping of annotating the liquid hole and has the through-hole, the bottom of insulation board is connected with anodal fuse and negative pole fuse, wear to be equipped with anodal rivet and negative pole rivet jointly in base plate and the insulation board, the both ends of anodal rivet are connected with anodal piece and anodal fuse respectively, the both ends of negative pole rivet are connected with negative pole piece and negative pole rivet respectively, the shaping has the depressed part on the insulation board, the projection in explosion-proof hole is located the depressed part, penetrating shaping has a plurality of pressure release holes on the depressed part, be equipped with the flexible glue film in the depressed part, the mid point of flexible glue film is located between a plurality of flexible glue hole and the inner wall of flexible glue film fix on the inner wall of depressed part, the flexible glue hole can be kept away from the depressed part towards the removal direction of depressed part.

Furthermore, the soft film is fixed on the inner wall of the concave part through a bolt and a nut.

Further, two mounting grooves have been seted up at the top of base plate, two all cooperate in the mounting groove and install insulating pad, anodal piece and negative pole piece are contradicted respectively on two insulating pad.

The utility model has the advantages that: when the inside atmospheric pressure of battery is too high, the inside high-pressure gas of battery can strike the flexible glue piece, make the flexible glue piece remove towards the direction of keeping away from the depressed part inner wall, high-pressure gas can be smoothly through disappointing the hole and break away explosion-proof diaphragm, can not obstruct the gaseous release in the battery inside, work as and when the inside atmospheric pressure of battery is unanimous with atmospheric pressure, because the flexible glue piece is attached at the inner wall of depressed part and cover the pressure release hole, thereby can completely cut off oxygen and moisture outside the battery, avoid oxygen and moisture to enter into the battery through the pressure release hole inside, reduce the risk that the battery is out of control, promote the security of battery.

Drawings

Fig. 1 is an isometric view of an embodiment of the present invention;

fig. 2 is a cross-sectional view of an embodiment of the present invention.

Description of the figure numbering: 1. the explosion-proof structure comprises a base plate, 11, a liquid filling hole, 111, a sealing nail, 12, an explosion-proof hole, 121, an explosion-proof membrane, 13, a mounting groove, 131, an insulating gasket, 2, an anode block, 21, an anode tab, 22, an anode rivet, 3, a cathode block, 31, a cathode tab, 32, a cathode rivet, 4, an insulating plate, 41, a through hole, 42, a concave part, 421, a pressure relief hole, 5, a soft rubber sheet, 6, a bolt, 7 and a nut.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention belong to the protection scope of the present invention.

As shown in fig. 1-2, a lithium ion battery cover plate assembly, including a substrate 1, both ends are connected with positive pole piece 2 and negative pole piece 3 respectively at the left and right sides of the top of substrate 1, penetrating shaping has notes liquid hole 11 and explosion-proof hole 12 on substrate 1 between positive pole piece 2 and negative pole piece 3, sealed threaded connection has seal nail 111 in notes liquid hole 11, explosion-proof diaphragm 121 has been welded in explosion-proof hole 12, insulating board 4 is equipped with in the bottom subsides of substrate 1, insulating board 4 has through-hole 41 corresponding to the position shaping of annotating liquid hole 11, the bottom of insulating board 4 is connected with positive pole fuse 21 and negative pole fuse 31, wear to be equipped with positive rivet 22 and negative pole rivet 32 in substrate 1 and insulating board 4 jointly, the both ends of positive rivet 22 are connected with positive pole piece 2 and positive fuse 21 respectively, the both ends of negative pole rivet 32 are connected with negative pole piece 3 and negative pole 32 respectively, the shaping has rectangular depressed part 42 on the insulating board 4, the projection of explosion-proof hole is located in the bottom plate of depressed part 42, the bottom plate of depressed part 42, be equipped with two pressure relief parts 421 that the inner wall 421 of the flexible glue piece 421 that the depressed part 421 of the flexible glue piece 5 moves towards the depressed flexible glue piece 421, and the flexible glue piece 421 that the depressed part 5 moves away from the depressed part 5, the depressed part of the depressed part 5, the depressed part of the depressed flexible glue piece, the depressed part of the depressed part 5, and the flexible glue hole 421, the flexible glue piece that the depressed part of the depressed part 5.

In this embodiment, the flexible film 5 is fixed on the inner wall of the recessed portion 42 through the bolt 6 and the nut 7, and is reasonable in design and convenient to install.

In this embodiment, two mounting grooves 13 have been seted up at base plate 1's top, all cooperate in two mounting grooves 13 to install insulating pad 131, and anodal piece 2 and negative pole piece 3 contradict respectively on two insulating pad 131, reasonable in design.

In-service use, when the inside atmospheric pressure of battery is too high, the inside high-pressure gas of battery can strike flexible glue piece 5, make flexible glue piece 5 remove towards the direction of keeping away from depressed part 42 inner wall, high-pressure gas can be smoothly through disappointing the hole and with explosion-proof diaphragm 121 break away, can not obstruct the gaseous release in the inside of battery, work as and when the inside atmospheric pressure of battery is unanimous with atmospheric pressure, because flexible glue piece 5 is attached at the inner wall of depressed part 42 and covers pressure release hole 421, thereby can be isolated outside the battery with oxygen and moisture, avoid oxygen and moisture to enter into inside the battery through pressure release hole 421, reduce the risk that the battery is out of control, promote the security of battery.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and all modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a lithium ion battery cover plate assembly, includes base plate (1), the top insulation of base plate (1) is connected with positive pole piece (2) and negative pole piece (3), penetrating shaping has notes liquid hole (11) and explosion-proof hole (12) on base plate (1), the shutoff has sealed nail (111) in annotating liquid hole (11), explosion-proof diaphragm (121) have been welded in explosion-proof hole (12), insulation board (4) are equipped with in the bottom subsides of base plate (1), insulation board (4) correspond the position shaping of annotating liquid hole (11) have through-hole (41), the bottom of insulation board (4) is connected with positive pole fuse (21) and negative pole fuse (31), wear to be equipped with positive pole rivet (22) and negative pole rivet (32) in base plate (1) and insulation board (4) jointly, the both ends of positive pole rivet (22) are connected with positive pole piece (2) and positive pole fuse (21) respectively, the both ends of negative pole rivet (32) are connected with negative pole piece (3) and negative pole rivet (32) respectively, its characterized in that, insulation board (4) are equipped with the sunken portion (42) respectively, the shaping of pressure release hole (421), the sunken portion (42) in the sunken portion (42) of the shaping, the sunken portion (42) of the sunken portion of the flexible glue, the midpoint of flexible glue piece (5) is located between a plurality of pressure release holes (421) and the midpoint of flexible glue piece (5) is fixed on the inner wall of depressed part (42), flexible glue piece (5) are attached in the inner wall of depressed part (42) and flexible glue piece (5) cover a plurality of pressure release holes (421), the part that flexible glue piece (5) covered pressure release hole (421) can move towards the direction of keeping away from depressed part (42) inner wall.

2. The lithium ion battery cover plate assembly according to claim 1, wherein the soft film (5) is fixed on the inner wall of the recess (42) by a bolt (6) and a nut (7).

3. The lithium ion battery cover plate assembly according to claim 1, wherein two mounting grooves (13) are formed in the top of the base plate (1), insulating gaskets (131) are respectively mounted in the two mounting grooves (13) in a matching manner, and the positive electrode block (2) and the negative electrode block (3) respectively abut against the two insulating gaskets (131).