Layered lithium battery ignition device

Abstract

The utility model discloses a layered lithium battery ignition device, relates to the technical field of lithium battery ignition devices, and aims to solve the problems that after a layered lithium battery pack is placed on a heating table to be heated, only the bottom of the layered lithium battery pack is in contact with the heating table, so that the temperature of other surfaces relative to the bottom surface is obviously lower; the technical problems that the overall limiting temperature of the layered lithium battery pack is inconvenient to measure, and the working performance of a lithium battery in a high-temperature environment in a real use scene is inconvenient to simulate are solved, and the layered lithium battery pack comprises a heating shell of which the two ends are detachably provided with sealing end covers, and a battery assembly is detachably placed in the heating shell; a heat gathering assembly is fixedly arranged on the inner wall of the heating shell in an annular array, and a heating wire for electrically heating the battery assembly is arranged in the heating shell. The lithium battery testing device has the advantage of simulating the working performance of the lithium battery in a high-temperature environment in a real use scene.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery ignition devices, and more specifically to a layered lithium battery ignition device. Background Art

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as positive / negative electrode materials and non-aqueous electrolyte solutions. Lithium batteries have been widely used in new energy vehicles and equipment such as electric vehicles, electric bicycles, mobile phones, laptops and power banks due to their cleanliness, high efficiency and reusability. With the rapid development of various industries, fire and explosion accidents related to them have occurred frequently. Most of these fires occurred during charging and were related to the thermal runaway of lithium batteries. In order to ensure the safety of lithium batteries, the thermal runaway phenomenon and the extreme temperature of lithium batteries need to be tested after they are produced.

[0003] At present, when testing the limit temperature of lithium batteries under working conditions, the traditional testing method is to place the lithium battery on a heating table and gradually heat it until thermal runaway occurs inside and a fire occurs, so as to obtain the limit temperature under working conditions. However, there are many types of lithium batteries. For a layered lithium battery pack, after it is placed on a heating table for heating, only the bottom contacts the heating table, so the temperature is significantly lower than other surfaces on the bottom. It is not convenient to measure the limit temperature of the layered lithium battery pack as a whole, and it is not convenient to simulate the performance of lithium batteries working in a high temperature environment under real usage scenarios. In view of this, we propose a layered lithium battery ignition device. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the prior art, meet the actual needs, and provide a layered lithium battery ignition device to solve the current technical problems that after the layered lithium battery pack is placed on a heating table for heating, only the bottom contacts the heating table, so the temperature of other surfaces is significantly lower than that of the bottom, which makes it inconvenient to measure the overall limit temperature of the layered lithium battery pack and to simulate the performance of the lithium battery working in a high temperature environment under real usage scenarios.

[0005] In order to solve the above technical problems, the utility model provides the following technical solutions: a layered lithium battery ignition device, comprising a heating shell with sealed end covers detachably installed at both ends;

[0006] The battery assembly is detachably placed inside the heating shell, and a heat collecting assembly is fixedly arranged in a ring array on the inner wall of the heating shell. A heating wire for electrically heating the battery assembly is arranged inside the heating shell;

[0007] The heat collecting assembly includes an arc-shaped heat conducting sheet 1 and an arc-shaped heat conducting sheet 2 which are connected to the inner edge surface of the heating shell, the arc-shaped heat conducting sheet 1 and the arc-shaped heat conducting sheet 2 are both arc-shaped plate-shaped structures, and a diffusion-type heat conducting groove for diffusing heat is formed between the arc-shaped heat conducting sheet 1 and the arc-shaped heat conducting sheet 2, and the diffusion-type heat conducting groove gradually increases in size from the inner wall of the heating shell toward the axial position thereof;

[0008] The battery assembly can be detachably mounted on the heat collecting assembly;

[0009] A circulation structure is provided between the sealed end covers to realize air circulation inside the heating shell to ensure that the battery assembly is evenly heated.

[0010] The utility model designs a circulation structure between the sealed end covers, and the heat in the heating shell heats the air through the circulation structure, and then self-circulates inside the heating shell, so that the heat inside the heating shell is evenly distributed, and the battery assembly is evenly heated, thereby simulating the performance of lithium batteries working in a high temperature environment in real usage scenarios.

[0011] Preferably, the circulation structure comprises a circulation component symmetrically arranged and detachably mounted on a side of the sealing end cover away from the heating shell, and a mounting hole connected to the interior of the heating shell is provided at a position inside the sealing end cover corresponding to the circulation component.

[0012] Preferably, the circulation component includes a fan seat with one side abutting against the sealing end cover, and fixing bolts with one end screwed into the sealing end cover are arranged at four corners of the other side of the fan seat, and the fan seat has a built-in fan structure.

[0013] Preferably, a circulation duct for circulating air in the heating shell is detachably installed between the fan seats arranged in the same axial direction.

[0014] Preferably, the battery assembly includes a battery protective shell in which a plurality of lithium battery bodies are equidistantly and detachably arranged, and the battery protective shell is used to wrap and protect the lithium battery bodies.

[0015] Preferably, the lithium battery bodies are commonly connected with a power conducting wire, one end of the power conducting wire away from the lithium battery body is fixedly connected with a power conducting connector, and a groove for the power conducting connector to extend out is provided on the outer edge surface of the heating shell.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The utility model designs a circulation structure between the sealed end covers. The circulation structure allows the heat in the heating shell to heat the air and then self-circulate inside the heating shell, so that the heat inside the heating shell is evenly distributed, and the battery assembly is evenly heated, thereby simulating the performance of a lithium battery working in a high-temperature environment in a real usage scenario. This solves the problem that after a stratified lithium battery pack is placed on a heating table for heating, only the bottom contacts the heating table, so the temperature of other surfaces is significantly lower than that of the bottom, making it inconvenient to measure the overall limit temperature of the stratified lithium battery pack and simulating the performance of a lithium battery working in a high-temperature environment in a real usage scenario.

[0018] 2. The utility model also designs the structure of the heat collection component. The arc-shaped heat conductive sheet 2 formed between the arc-shaped heat conductive sheet 1 and the arc-shaped heat conductive sheet 2 in the heat collection component can diffuse the heat generated by the electric heating inside the heating shell toward the middle, and the battery assembly is placed on the heat collection component without direct contact with the inside of the heating shell. The circulation structure can further make the heat inside the heating shell evenly distributed, thereby achieving the effect of evenly heating the battery assembly, further solving the problem that for a layered lithium battery pack, after it is placed on a heating table for heating, only the bottom contacts the heating table, so the temperature is significantly lower than other surfaces on the bottom, making it inconvenient to measure the overall limit temperature of the layered lithium battery pack, and it is inconvenient to simulate the performance of lithium batteries working in a high temperature environment under real usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the utility model;

[0020] Figure 2 It is a structural schematic diagram of the circulation component of the utility model;

[0021] Figure 3 For this utility model Figure 1 A cross-sectional view of the heating shell;

[0022] Figure 4 This is a schematic diagram of the structure of the battery assembly of the utility model;

[0023] Figure 5 For this utility model Figure 4 A cross-sectional view of

[0024] Figure 6 This is a schematic diagram of the structure of the heating shell of the utility model;

[0025] Figure 7 It is a structural schematic diagram of the heat collection component of the utility model.

[0026] Description of the numbers in the figure:

[0027] 1. Heating shell; 2. Sealing end cover; 3. Heat collecting assembly; 301. Arc-shaped heat conducting sheet 1; 302. Arc-shaped heat conducting sheet 2; 303. Diffusion heat conducting groove; 4. Circulation assembly; 401. Fan seat; 402. Fixing bolts; 5. Circulation pipe; 6. Battery assembly; 601. Battery protective shell; 602. Lithium battery body; 603. Power wire; 604. Power connector. DETAILED DESCRIPTION

[0028] like Figure 1 , Figure 3 , Figure 6 and Figure 7 As shown, the utility model relates to a layered lithium battery ignition device, including a heating shell 1 with sealed end caps 2 detachably installed at both ends, a battery assembly 6 is detachably placed inside the heating shell 1, and a heat collecting assembly 3 is fixedly arranged in a ring array on the inner wall of the heating shell 1, a heating wire for electrically heating the battery assembly 6 is arranged in the heating shell 1, the heat collecting assembly 3 includes an arc-shaped heat conductive sheet 1 301 and an arc-shaped heat conductive sheet 2 302 which are connected to the inner edge surface of the heating shell 1, the arc-shaped heat conductive sheet 1 301 and the arc-shaped heat conductive sheet 2 302 are both arc-shaped plate-like structures, and a diffusion-type heat conductive groove 303 for diffusing heat is formed between the arc-shaped heat conductive sheet 1 301 and the arc-shaped heat conductive sheet 2 302, the diffusion-type heat conductive groove 303 gradually increases from the inner wall of the heating shell 1 toward its axial position, the battery assembly 6 is detachably placed on the heat collecting assembly 3, and a circulation structure for realizing air circulation inside the heating shell 1 to ensure that the battery assembly 6 is evenly heated is arranged between the sealed end caps 2.

[0029] like Figure 1-Figure 3 As shown, in an embodiment of the utility model, the circulation structure includes a circulation component 4 symmetrically arranged and removably mounted on a side of the sealing end cover 2 away from the heating shell 1, and a mounting hole connected to the interior of the heating shell 1 is opened at a position corresponding to the circulation component 4 inside the sealing end cover 2. The circulation component 4 includes a fan seat 401 one side of which is abutted against the sealing end cover 2, and the other side of the fan seat 401 is provided with a fixing bolt 402 at one end which can be screwed into the sealing end cover 2, and the fan seat 401 has a built-in fan structure, and a circulation duct 5 for circulating air in the heating shell 1 is detachably installed between the fan seats 401 arranged in the same axial direction.

[0030] like Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, in an embodiment of the utility model, the battery assembly 6 includes a battery protective shell 601 in which a plurality of lithium battery bodies 602 are equidistantly and detachably arranged. The battery protective shell 601 is used to wrap and protect the lithium battery bodies 602. The lithium battery bodies 602 are commonly connected with power-carrying wires 603. One end of the power-carrying wires 603 away from the lithium battery bodies 602 is fixedly connected with a power-carrying connector 604. A groove is provided on the outer edge surface of the heating shell 1 for the power-carrying connector 604 to extend out.

[0031] Working principle: This embodiment provides a layered lithium battery ignition device. When in use, first place the battery assembly 6 on the heat collecting assembly 3 in the heating shell 1, then extend the power connector 604 from the slot and connect it to the external electrical equipment, so that the battery assembly 6 is in a discharge working state, and then heat the air inside the heating shell 1 to increase the air temperature inside the heating shell 1, thereby simulating the working condition of the battery assembly 6 in a high temperature environment, and the arc-shaped heat conductive sheet 2 302 formed between the arc-shaped heat conductive sheet 1 301 and the arc-shaped heat conductive sheet 2 302 in the heat collecting assembly 3 allows the heat generated by the electric heating inside the heating shell 1 to diffuse toward the middle, and cooperate with the built-in fan structure of the fan seat 401 to make the hot air inside the heating shell 1 self-circulate with the help of the circulation pipe 5, so that the heat inside the heating shell 1 is evenly distributed, so that the limit temperature of the battery assembly 6 can be tested as a whole until it has thermal runaway and catches fire, and its limit temperature value can be obtained.

[0032] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A layered lithium battery ignition device, characterized in that: It comprises a heating shell (1) with sealing end covers (2) detachably mounted at both ends; A battery assembly (6) is detachably placed inside the heating shell (1), and heat collecting assemblies (3) are fixedly arranged in a ring array on the inner wall of the heating shell (1), and a heating wire for electrically heating the battery assembly (6) is provided inside the heating shell (1); The heat collecting assembly (3) comprises an arc-shaped heat conducting sheet 1 (301) and an arc-shaped heat conducting sheet 2 (302) which are connected to the inner edge surface of the heating shell (1); the arc-shaped heat conducting sheet 1 (301) and the arc-shaped heat conducting sheet 2 (302) are both arc-shaped plate-shaped structures, and a diffusion-type heat conducting groove (303) for diffusing heat is formed between the arc-shaped heat conducting sheet 1 (301) and the arc-shaped heat conducting sheet 2 (302); the diffusion-type heat conducting groove (303) gradually increases in size from the inner wall of the heating shell (1) toward its axial center position; The battery assembly (6) can be detachably mounted on the heat collection assembly (3); A circulation structure is provided between the sealing end covers (2) for realizing air circulation inside the heating housing (1) to ensure that the battery assembly (6) is evenly heated.

2. The layered lithium battery ignition device according to claim 1, characterized in that: The circulation structure comprises a circulation component (4) symmetrically arranged and detachably mounted on a side of the sealing end cover (2) away from the heating shell (1); a mounting hole connected to the interior of the heating shell (1) is provided in a position inside the sealing end cover (2) corresponding to the circulation component (4).

3. The layered lithium battery ignition device according to claim 2, characterized in that: The circulation assembly (4) comprises a fan seat (401) with one side abutting against the sealing end cover (2), and fixing bolts (402) with one end capable of being screwed into the sealing end cover (2) are provided at four corners of the other side of the fan seat (401), and the fan seat (401) has a built-in fan structure.

4. The layered lithium battery ignition device according to claim 3, characterized in that: A circulation duct (5) for circulating air in the heating shell (1) is detachably mounted between the fan seats (401) arranged in the same axial direction.

5. The layered lithium battery ignition device according to claim 1, characterized in that: The battery assembly (6) comprises a battery protection shell (601) having a plurality of lithium battery bodies (602) detachably arranged therein at equal intervals, wherein the battery protection shell (601) is used to wrap and protect the lithium battery bodies (602).

6. The layered lithium battery ignition device according to claim 5, characterized in that: The lithium battery bodies (602) are commonly connected with a power conducting wire (603), one end of the power conducting wire (603) away from the lithium battery body (602) is fixedly connected with a power conducting connector (604), and a groove for the power conducting connector (604) to extend out is provided on the outer edge surface of the heating shell (1).

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