Explosion-proof isolation bin for lithium ion battery

Abstract

The utility model discloses an explosion-proof isolation bin for a lithium ion battery, which relates to the technical field of battery explosion-proof, and comprises a hollow explosion-proof shell, the inside of the explosion-proof shell is fixedly connected with a battery fixing sleeve, the battery fixing sleeve is annular, and the explosion-proof shell is provided with a plurality of through holes. A lithium ion battery is fixedly installed in the battery fixing sleeve, the bottom of the explosion-proof shell is fixedly connected with a base, and the surface of the base is fixedly connected with a negative electrode wire. According to the explosion-proof isolation bin for the lithium ion battery, when the separation blocks move towards the two sides, a negative electrode wire cut by a wire cutter can be driven to be separated, so that the cut-off negative electrode wire moves oppositely, and then the negative electrode wire can be separated when the lithium ion battery is overcharged or short-circuited; and therefore, unstable current generated when the lithium ion battery is overcharged or short-circuited can be prevented from being output to the other end of the negative wire, and an external electric appliance can be protected and powered off.

Description

Technical Field

[0001] The utility model relates to the technical field of battery explosion-proof, in particular to an explosion-proof isolation chamber for lithium-ion batteries. Background Art

[0002] Lithium-ion batteries, commonly known as rocking chair batteries, are a general term for batteries with lithium-ion embedded compounds as the positive electrode material. They are a type of secondary battery (rechargeable battery) that mainly relies on the movement of lithium ions between the positive and negative electrodes to work. Lithium-ion batteries are composed of a positive electrode, a negative electrode, an electrolyte and a diaphragm, plus positive and negative leads, a battery case, a safety device, etc.

[0003] In the use of existing lithium-ion battery explosion-proof isolation chambers, multiple batteries are usually placed and installed inside a compartment. When such lithium-ion battery explosion-proof isolation chambers are subjected to prolonged charging or short circuit, they are prone to burning or transferring high temperatures to adjacent lithium-ion batteries, and are prone to explosions that damage other lithium-ion batteries and also cause explosions. Therefore, this solution proposes a lithium-ion battery explosion-proof isolation chamber to solve the above problems. Utility Model Content

[0004] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide an explosion-proof isolation chamber for lithium-ion batteries, which can solve the problems of the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a lithium-ion battery explosion-proof isolation chamber, comprising an explosion-proof shell, which is hollow, with a battery fixing sleeve fixedly connected to the inside of the explosion-proof shell, the battery fixing sleeve being annular, and a lithium-ion battery fixedly installed inside the battery fixing sleeve, the bottom of the explosion-proof shell being fixedly connected to a base, the surface of the base being fixedly connected to a negative pole wire, the other end of the negative pole wire being fixedly connected to a negative pole contact block, the negative pole contact block being in contact with the bottom of the lithium-ion battery, the surface of the base being fixedly connected to a fixing block on the inside of the explosion-proof shell, the top of the fixing block being triangular, and a piston column being slidably connected to the inside of the base.

[0006] Preferably, the surface of the piston column is fixedly connected to a rotating column, the surface of the rotating column is rotatably connected to a separation block, the surface of the separation block is provided with a groove that matches the triangle on the top of the fixed block, the top of the separation block is fixedly connected to a wire cutter, and a handle is provided on the top of the explosion-proof housing.

[0007] Preferably, one side of the piston column is fixedly connected to a spring, the other end of the spring is fixedly connected to the base, and an exhaust groove is provided on the surface of the piston column.

[0008] Preferably, the other end of the piston column is fixedly connected to an air-blocking plug, and the air-blocking plug is in contact with the surface of the base.

[0009] Preferably, a sealing isolation plate is fixedly connected to the hollow interior of the explosion-proof housing.

[0010] Preferably, a negative electrode paralleling tube is fixedly connected to the interior of the explosion-proof housing, and the negative electrode paralleling tube is hollow.

[0011] Preferably, the multiple negative electrode wires are interconnected in the hollow interior of the negative electrode paralleling tube, the sealing isolation plate is fixedly connected to the negative electrode paralleling tube, the sealing isolation plate and the top of the negative electrode paralleling tube are fixedly connected with an electrode separator, the electrode separator is in contact with the top of the lithium-ion battery, and the electrode separator is fixedly connected to the inner wall of the explosion-proof shell.

[0012] Preferably, the connection point of the negative electrode wire is fixedly connected to a negative parallel wire, the other end of the negative parallel wire passes through the electrode separator and the top of the explosion-proof shell, one end of the negative parallel wire passes through the electrode separator and the explosion-proof shell and is fixedly connected to a negative electrode contact, the top of the lithium-ion battery is fixedly connected to a positive parallel piece, the positive parallel piece is U-shaped, and the top of the positive parallel piece is fixedly connected to a positive electrode contact.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] (1) The explosion-proof isolation chamber of the lithium-ion battery is characterized in that when the separation block moves, it is squeezed by the inclined surface of the fixed block and moves toward both sides. When the separation block moves toward both sides, it drives the negative electrode wire cut by the wire cutter to separate, so that the cut negative electrode wire moves in opposite directions, thereby separating the negative electrode wire when the lithium-ion battery is overcharged or short-circuited, thereby preventing the unstable current of the lithium-ion battery from being output to the other end of the negative electrode wire when it is overcharged or short-circuited, thereby protecting and cutting off the power to external electrical appliances.

[0015] (2) In the explosion-proof isolation chamber of the lithium-ion battery, when the piston rod is pushed out by the pressure inside the explosion-proof shell, the piston rod squeezes the spring to make it contract. When the piston rod moves, it drives the air-blocking plug so that it no longer contacts the base, thereby enabling the high-pressure gas inside the explosion-proof shell to be discharged through the exhaust groove, thereby preventing the explosion of the explosion-proof shell due to excessive pressure inside the explosion-proof shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a schematic structural diagram of a lithium-ion battery explosion-proof isolation chamber of the utility model;

[0018] Figure 2 This is a cross-sectional view of an explosion-proof isolation chamber for lithium-ion batteries in the utility model;

[0019] Figure 3This is a cross-sectional view of an explosion-proof isolation chamber for lithium-ion batteries in the utility model;

[0020] Figure 4 This is a cross-sectional view of an explosion-proof isolation chamber for lithium-ion batteries in the utility model;

[0021] Figure 5 This is a cross-sectional view of the base of a lithium-ion battery explosion-proof isolation compartment of the utility model;

[0022] Figure 6 It is a schematic diagram of the local structure of the utility model.

[0023] Figure numerals: 1. explosion-proof shell; 2. battery fixing sleeve; 3. positive electrode parallel plate; 4. positive electrode contact; 5. negative electrode contact; 6. lithium-ion battery; 7. negative electrode parallel connection line; 8. negative electrode parallel line tube; 9. sealing isolation plate; 10. negative electrode wire; 11. negative electrode contact block; 12. electrode separator; 13. base; 14. piston column; 15. spring; 16. exhaust groove; 17. air-blocking plug; 18. fixing block; 19. rotating column; 20. separation block; 21. wire cutter. DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0025] See also Figure 1-6 The utility model provides a technical solution: a lithium-ion battery explosion-proof isolation chamber, comprising an explosion-proof shell 1, the explosion-proof shell 1 is hollow, a battery fixing sleeve 2 is fixedly connected to the interior of the explosion-proof shell 1, the battery fixing sleeve 2 is annular, a lithium-ion battery 6 is fixedly installed inside the battery fixing sleeve 2, the bottom of the explosion-proof shell 1 is fixedly connected to a base 13, a negative wire 10 is fixedly connected to the surface of the base 13, the other end of the negative wire 10 is fixedly connected to a negative contact block 11, the negative contact block 11 is in contact with the bottom of the lithium-ion battery 6, the base 13 is fixedly connected to a fixing block 18 on the surface inside the explosion-proof shell 1, the top of the fixing block 18 is triangular, a piston column 14 is slidably connected to the interior of the base 13, a rotating column 19 is fixedly connected to the surface of the piston column 14, a separating block 20 is rotatably connected to the surface of the rotating column 19, a groove is opened on the surface of the separating block 20 that matches the triangle of the top of the fixing block 18, a wire cutter 21 is fixedly connected to the top of the separating block 20, and a handle is provided on the top of the explosion-proof shell 1.

[0026] When the lithium-ion battery 6 inside the explosion-proof housing 1 is overcharged or short-circuited, a large amount of gas will be generated or spontaneous combustion or explosion will occur, thereby increasing the pressure inside the explosion-proof housing 1, which will push the piston column 14 to descend and separate from the inside of the base 13. When the piston column 14 descends, the wire cutter 21 will cut and separate the negative wire 10. When the piston column 14 descends, it will drive the rotating column 19, the separation block 20, and the wire cutter 21 on the surface of the piston column 14 to move. When the separation block 20 moves, it is squeezed by the inclined surface of the fixed block 18 and moves to both sides. When the separation block 20 moves to both sides, it drives the negative wire 10 cut by the wire cutter 21 to separate, causing the severed negative wire 10 to move in opposite directions, thereby separating the negative wire 10 when the lithium-ion battery 6 is overcharged or short-circuited, thereby preventing the unstable current of the lithium-ion battery 6 from being output to the other end of the negative wire 10 when it is overcharged or short-circuited, thereby protecting and powering off external electrical appliances.

[0027] A spring 15 is fixedly connected to one side of the piston column 14, and the other end of the spring 15 is fixedly connected to the base 13. An exhaust groove 16 is provided on the surface of the piston column 14, and an air-blocking plug 17 is fixedly connected to the other end of the piston column 14. The air-blocking plug 17 is in contact with the surface of the base 13.

[0028] When the piston rod 14 is pushed out by the pressure inside the explosion-proof housing 1, the piston rod 14 squeezes the spring 15 to make it contract. When the piston rod 14 moves, it drives the air-blocking plug 17 so that it no longer contacts the base 13, thereby allowing the high-pressure gas inside the explosion-proof housing 1 to be discharged through the exhaust groove 16, thereby preventing the explosion-proof housing 1 from exploding due to excessive pressure inside the explosion-proof housing 1.

[0029] A sealing isolation plate 9 is fixedly connected to the hollow interior of the explosion-proof shell 1. A negative parallel line tube 8 is fixedly connected to the interior of the explosion-proof shell 1. The negative parallel line tube 8 is hollow. Multiple negative wires 10 are interconnected in the hollow interior of the negative parallel line tube 8. The sealing isolation plate 9 is fixedly connected to the negative parallel line tube 8. The sealing isolation plate 9 and the negative parallel line tube 8 are fixedly connected to the top of the sealing isolation plate 9 and the negative parallel line tube 8. The electrode separator 12 is in contact with the top of the lithium-ion battery 6. The electrode separator 12 is fixedly connected to the inner wall of the explosion-proof shell 1. The connection points of multiple negative wires 10 are fixedly connected to the negative parallel line 7. The other end of the negative parallel line 7 passes through the electrode separator 12 and the top of the explosion-proof shell 1. The negative parallel line 7 passes through the electrode separator 12 and one end of the explosion-proof shell 1 is fixedly connected to the negative contact 5. The top of the lithium-ion battery 6 is fixedly connected to the positive parallel piece 3. The positive parallel piece 3 is U-shaped, and the top of the positive parallel piece 3 is fixedly connected to the positive contact 4.

[0030] The sealing isolation plate 9 separates the interior of the explosion-proof housing 1 and can protect other lithium-ion batteries 6 inside the explosion-proof housing 1 when a single lithium-ion battery 6 short-circuits or explodes. The positive parallel plate 3 connects the electrodes of multiple lithium-ion batteries 6 in series.

[0031] Working principle:

[0032] When the lithium-ion battery 6 inside the explosion-proof housing 1 is overcharged or short-circuited, a large amount of gas or spontaneous combustion or explosion will be generated, thereby increasing the pressure inside the explosion-proof housing 1, and then pushing the piston column 14 to descend and separate from the inside of the base 13. When the piston column 14 descends, the wire cutter 21 will cut and separate the negative wire 10. When the piston column 14 descends, it will drive the rotating column 19, the separation block 20, and the wire cutter 21 on the surface of the piston column 14 to move. When the separation block 20 moves, it is squeezed by the inclined surface of the fixed block 18 and moves to both sides. When the separation block 20 moves to both sides, it will drive the negative wire 10 cut by the wire cutter 21 to separate, so that the severed negative wire 10 moves in opposite directions, thereby being able to separate the negative wire 10 when the lithium-ion battery 6 is overcharged or short-circuited.

[0033] When the piston rod 14 is pushed out by the pressure inside the explosion-proof housing 1, the piston rod 14 squeezes the spring 15 to cause it to contract. When the piston rod 14 moves, it drives the air-blocking plug 17 so that it no longer contacts the base 13, thereby allowing the high-pressure gas inside the explosion-proof housing 1 to be discharged through the exhaust groove 16.

[0034] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A lithium-ion battery explosion-proof isolation chamber, comprising an explosion-proof housing (1), characterized in that: The explosion-proof housing (1) is hollow, and a battery fixing sleeve (2) is fixedly connected to the interior of the explosion-proof housing (1), the battery fixing sleeve (2) is annular, and a lithium-ion battery (6) is fixedly installed inside the battery fixing sleeve (2). The bottom of the explosion-proof housing (1) is fixedly connected to a base (13), and a negative electrode wire (10) is fixedly connected to the surface of the base (13). The other end of the negative electrode wire (10) is fixedly connected to a negative electrode contact block (11), and the negative electrode contact block (11) contacts the bottom of the lithium-ion battery (6). The surface of the base (13) inside the explosion-proof housing (1) is fixedly connected to a fixing block (18), and the top of the fixing block (18) is triangular. The interior of the base (13) is slidably connected to a piston column (14).

2. The explosion-proof isolation chamber for lithium-ion batteries according to claim 1, characterized in that: The surface of the piston column (14) is fixedly connected to a rotating column (19), the surface of the rotating column (19) is rotatably connected to a separating block (20), the surface of the separating block (20) is provided with a groove that matches the triangle on the top of the fixed block (18), the top of the separating block (20) is fixedly connected to a wire cutter (21), and a handle is provided on the top of the explosion-proof housing (1).

3. The explosion-proof isolation chamber for lithium-ion batteries according to claim 2, characterized in that: One side of the piston column (14) is fixedly connected to a spring (15), the other end of the spring (15) is fixedly connected to the base (13), and an exhaust groove (16) is provided on the surface of the piston column (14).

4. The explosion-proof isolation chamber for lithium-ion batteries according to claim 3, characterized in that: The other end of the piston column (14) is fixedly connected to a gas-blocking plug (17), and the gas-blocking plug (17) is in contact with the surface of the base (13).

5. The explosion-proof isolation chamber for lithium-ion batteries according to claim 1, characterized in that: A sealing isolation plate (9) is fixedly connected to the hollow interior of the explosion-proof housing (1).

6. The explosion-proof isolation chamber for lithium-ion batteries according to claim 5, characterized in that: A negative electrode paralleling tube (8) is fixedly connected to the interior of the explosion-proof housing (1), and the negative electrode paralleling tube (8) is hollow.

7. The explosion-proof isolation chamber for lithium-ion batteries according to claim 6, characterized in that: The plurality of negative electrode wires (10) are interconnected in the hollow interior of the negative electrode paralleling tube (8), the sealing isolation plate (9) is fixedly connected to the negative electrode paralleling tube (8), the sealing isolation plate (9) and the top of the negative electrode paralleling tube (8) are fixedly connected with an electrode separator (12), the electrode separator (12) and the top of the lithium-ion battery (6) are in contact with each other, and the electrode separator (12) is fixedly connected to the inner wall of the explosion-proof housing (1).

8. The explosion-proof isolation chamber for lithium-ion batteries according to claim 7, characterized in that: The connection point of the negative electrode wire (10) is fixedly connected to a negative electrode parallel connection line (7), the other end of the negative electrode parallel connection line (7) passes through the electrode separator (12) and the top of the explosion-proof shell (1), and one end of the negative electrode parallel connection line (7) passing through the electrode separator (12) and the explosion-proof shell (1) is fixedly connected to a negative electrode contact (5), and the top of the lithium-ion battery (6) is fixedly connected to a positive electrode parallel connection piece (3), the positive electrode parallel connection piece (3) is U-shaped, and the top of the positive electrode parallel connection piece (3) is fixedly connected to a positive electrode contact (4).

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