A lithium-ion battery electrolyte storage device
By designing a lithium-ion battery electrolyte storage device that incorporates cooling and stirring functions, the problem of high-temperature decomposition of electrolyte during transportation and storage was solved, achieving low-temperature storage and uniform temperature control of the electrolyte, thus ensuring battery performance and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HEFEI GUOXUAN HIGH TECH POWER ENERGY
- Filing Date
- 2025-06-27
- Publication Date
- 2026-07-31
AI Technical Summary
Lithium-ion battery electrolytes are difficult to maintain at low temperatures during transportation and storage, leading to electrolyte decomposition under high-temperature conditions, which affects battery performance and safety.
A lithium-ion battery electrolyte storage device was designed, comprising a tank, a cooling unit, an energy storage unit, a control unit, and a temperature sensor. The cooling unit maintains the low temperature of the storage chamber, and the stirring device ensures the uniformity of the electrolyte temperature.
Maintaining a low electrolyte temperature during transport prevents decomposition, ensures stable chemical properties of the electrolyte, and ensures uniform mixing temperature to avoid the effects of temperature differences.
Smart Images
Figure CN224577207U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of lithium-ion batteries, and in particular to a lithium-ion battery electrolyte storage device. Background Technology
[0002] Lithium-ion batteries are hailed as the "green chemical energy" of the 21st century and have been widely used in many fields such as 3C consumer electronics, power batteries, and energy storage. Lithium-ion battery electrolytes are generally composed of solvents, lithium salts, and additives. Among them, lithium hexafluorophosphate is the most common lithium salt and has the best overall performance. However, lithium hexafluorophosphate has poor stability under high temperature conditions and is prone to decomposition, producing HF, which causes electrolyte deterioration. In addition, some electrolyte additives themselves have poor stability but can significantly improve the performance of lithium-ion batteries, such as DTD. These additives are temperature sensitive and are prone to decomposition in the electrolyte, leading to electrolyte deterioration. Electrolytes with these additives need to be transported and stored at low temperatures.
[0003] During the transportation and storage of lithium-ion battery electrolytes, due to limitations in actual conditions, it is difficult to guarantee that the low-temperature environment is maintained throughout the entire transportation and storage process. As a result, the electrolyte is exposed to high-temperature environments and decomposes and deteriorates, leading to excessive free acid in the electrolyte and even the complete decomposition of some additives, ultimately affecting the electrical and safety performance of lithium-ion batteries. Utility Model Content
[0004] The technical problem to be solved by this utility model is to provide a lithium-ion battery electrolyte storage device to solve the problem that lithium-ion battery electrolyte cannot be stored and transported at low temperatures.
[0005] Based on the technical problems existing in the background art, this utility model proposes a lithium-ion battery electrolyte storage device, including a tank and a supporting unit for placing the tank. The tank has a liquid storage cavity and a cavity located below the liquid storage cavity. The liquid storage cavity and the cavity are separated by a partition. A refrigeration unit that contacts the partition is installed in the cavity. The liquid storage cavity is refrigerated and stored inside by the refrigeration unit.
[0006] In the above scheme, the entire tank body is cooled by a refrigeration unit, which keeps the electrolyte inside the cavity at a low temperature during transport, preventing the electrolyte from decomposing and maintaining its original chemical properties.
[0007] Preferably, an energy storage unit, a control unit, and a temperature sensor are also installed inside the cavity. The control unit is electrically connected to the refrigeration unit, the energy storage unit, and the temperature sensor, respectively. The temperature sensor extends from the cavity into the liquid storage cavity.
[0008] In the above scheme, the cavity provides installation positions for various components and can be housed in the same cavity, which facilitates maintenance and avoids damage. Its energy storage unit can provide power to the refrigeration unit, so that it can provide power for refrigeration even when the entire tank is moved. Its control unit can detect data through temperature sensors and adjust the refrigeration efficiency according to the internal temperature of the liquid storage cavity.
[0009] Preferably, the inner wall of the tank is provided with blades, which are located inside the liquid storage chamber.
[0010] Preferably, the tank wall is provided with a heat insulation layer.
[0011] In the above scheme, the insulation layer can reduce the rate of temperature rise of the tank and maintain the temperature of the liquid storage chamber to a certain extent, preventing the electrolyte from decomposing.
[0012] Preferably, the top of the tank is provided with an inlet and an outlet, and the storage chamber is provided with a pipe that is connected to the inlet and extends close to the partition.
[0013] In the above scheme, the inlet is used to fill the storage chamber with electrolyte, and the outlet can facilitate the venting of air during the liquid filling process of the tank, preventing the tank from having difficulty filling due to a single inlet.
[0014] Preferably, an annular base is installed at the bottom of the tank, and multiple concentric annular grooves are provided below the base. The bearing unit includes a barrel, and a hole is opened at the center of the bottom of the barrel. Multiple upward-opening roller grooves are distributed circumferentially at the bottom of the barrel. Multiple balls are placed in the roller grooves, and the balls are connected by a shaft and roll in the roller grooves. One group of balls is connected to a drive motor by a shaft.
[0015] In the above scheme, the lower part of the tank is located inside the barrel. The barrel rotates the tank through the action of the ball and the drive motor, which allows the electrolyte inside the tank to be stirred along with the tank, so that the temperature of the electrolyte can be evenly distributed and avoid large temperature differences that would affect the monitoring of the temperature sensor.
[0016] Preferably, the side wall of the barrel is provided with a vertical strip groove, and a roller is rotatably installed in the strip groove.
[0017] In the above scheme, the rollers are used to limit the spacing on the sides of the tank, which can prevent the tank from swaying during rotation and improve the stability of the tank.
[0018] Compared with the prior art, the lithium-ion battery electrolyte storage device proposed in this utility model adopts the above-mentioned technical solution and achieves the following technical effects:
[0019] This invention can maintain the cooling effect during the movement of the tank, ensuring that the electrolyte inside the tank can maintain good chemical properties. This invention can also uniformly mix the electrolyte inside the tank during the cooling process, so that the temperature inside the electrolyte is consistent, and can prevent the electrolyte from decomposing due to large temperature differences between the upper and lower layers. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the cross-sectional structure of this utility model.
[0021] In the diagram: 1. Tank; 2. Bearing unit; 11. Liquid storage chamber; 12. Cavity; 13. Baffle; 3. Refrigeration unit; 4. Energy storage unit; 5. Control unit; 6. Temperature sensor; 14. Blade; 15. Insulation layer; 16. Liquid inlet; 17. Liquid outlet; 18. Pipe; 7. Base; 71. Annular groove; 21. Barrel; 211. Hole; 212. Roller groove; 213. Sphere; 214. Shaft; 215. Drive motor; 216. Strip groove; 217. Roller. Detailed Implementation
[0022] Example
[0023] Please refer to Figure 1 This utility model proposes a lithium-ion battery electrolyte storage device, including a tank 1 and a supporting unit 2 for placing the tank 1. The tank 1 has a storage cavity 11 and a cavity 12 located below the storage cavity 11. The storage cavity 11 and the cavity 12 are separated by a partition 13. A refrigeration unit 3 is installed in the cavity 12 and contacts the partition 13. The storage cavity 11 is refrigerated and stored by the refrigeration unit 3. In this solution, the electrolyte needs to be poured into the tank 1 and the refrigeration unit 3 is activated to reduce the temperature of the storage cavity 11 of the tank 1. When the temperature in the storage cavity 11 decreases, the temperature of the electrolyte will also decrease, thereby achieving the effect of refrigeration.
[0024] In specific implementation, refer to Figure 1 The cavity 12 is also equipped with an energy storage unit 4, a control unit 5, and a temperature sensor 6. The control unit 5 is electrically connected to the cooling unit 3, the energy storage unit 4, and the temperature sensor 6, respectively. The temperature sensor 6 extends from the cavity 12 into the liquid storage chamber 11. In this scheme, the energy storage unit 4 is set in the cavity 12 below the tank 1 to provide power to the cooling unit 3. At the same time, the temperature sensor 6 can contact the electrolyte in the liquid storage chamber 11 to detect the temperature of the electrolyte and transmit it to the control unit 5. The control unit 5 can control the cooling unit 3 to perform cooling and temperature reduction according to the set temperature. The energy storage unit 4 also has a socket, and the side wall of the tank 1 has an opening corresponding to the socket to facilitate the charging of the energy storage unit 4.
[0025] In specific implementation, refer to Figure 1 The tank body 1 has an insulation layer 15 inside its wall. In this solution, the material of the tank body 1 may have a thermal conductivity effect. Therefore, the insulation layer 15 is provided in the tank body 1 to keep the tank body 1 warm and prevent the tank body 1 from absorbing external heat. The insulation layer 15 is filled with aerogel insulation material.
[0026] In specific implementation, refer to Figure 1 The top of the tank 1 is provided with an inlet 16 and an outlet 17. The storage chamber 11 is provided with a pipe 18 that is connected to the inlet 16 and extends close to the partition 13. In this scheme, the inlet 16 and the outlet 17 are used for the entry and exit of electrolyte. When electrolyte is injected from the inlet, the outlet 17 is opened to facilitate the expulsion of air in the storage chamber 11 and to avoid excessive pressure in the storage chamber 11 when liquid is poured in through the inlet 16.
[0027] In specific implementation, refer to Figure 1 The bottom of the tank 1 is fitted with an annular base 7, and multiple concentric annular grooves 71 are provided below the base 7. The supporting unit 2 includes a barrel 21, with a hole 211 at the center of the bottom of the barrel 21. Multiple upward-opening roller grooves 212 are distributed circumferentially on the bottom of the barrel 21, and multiple balls 213 are placed in the roller grooves 212. The balls 213 are connected by a shaft 214 and roll within the roller grooves 212. One group of balls 213 is connected to a drive motor 215 via the shaft 214. The inner wall of the tank 1 is provided with blades 14, which are located in the liquid storage chamber 11. In this design, the annular base 7 of the tank 1 can provide bottom support for the cavity 12 and protect the components inside the cavity 12. The hole 211 in the middle of the annular base 7 can increase the heat dissipation effect of the device. This application has a manufacturing process... During the cooling process, due to the depth of the tank 1, the heat conduction of the electrolyte may be uneven, resulting in a higher temperature at the top of the electrolyte compared to the bottom, affecting the storage of the electrolyte and the accuracy of the temperature sensor 6. Therefore, in this application, the possibility of the tank 1 tilting is limited by placing the tank 1 inside the barrel 21. A ball 213 is set at the bottom of the tank 1. When the drive motor 215 runs, it can drive the ball 213 to rotate through the shaft 214. The ball 213 contacts the annular base 7, which can drive the annular base 7 to rotate, thereby driving the entire tank 1 to rotate. During the rotation of the tank 1, its blades 14 can stir the electrolyte in the tank 1, thereby ensuring that the electrolyte is fully stirred and the temperature of the electrolyte is more uniform.
[0028] In specific implementation, refer to Figure 1The side wall of the barrel 21 is provided with a vertical strip groove 216, and a roller 217 is rotatably installed in the strip groove 216. In this solution, the roller 217 can limit the distance between the tank 1 and the inner wall of the barrel 21, avoid friction between the side wall of the tank 1 and the side wall of the barrel 21, and make the rotation of the tank 1 more stable.
[0029] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.
Claims
1. A lithium-ion battery electrolyte storage device, characterized by, The container includes a tank (1) and a support unit (2) for placing the tank (1). The tank (1) has a liquid storage chamber (11) and a cavity (12) located below the liquid storage chamber (11). The liquid storage chamber (11) and the cavity (12) are separated by a partition (13). A refrigeration unit (3) that contacts the partition (13) is installed in the cavity (12). The liquid storage chamber (11) is refrigerated and stored inside by the refrigeration unit (3).
2. The lithium-ion battery electrolyte storage device according to claim 1, characterized in that, The cavity (12) is also equipped with an energy storage unit (4), a control unit (5) and a temperature sensor (6). The control unit (5) is electrically connected to the cooling unit (3), the energy storage unit (4) and the temperature sensor (6) respectively. The temperature sensor (6) extends from the cavity (12) into the liquid storage chamber (11).
3. The lithium-ion battery electrolyte storage device according to claim 1, characterized in that, The inner wall of the tank (1) is provided with blades (14), which are located in the liquid storage chamber (11).
4. The lithium-ion battery electrolyte storage device according to claim 1, characterized in that, The tank body (1) has an insulation layer (15) inside the tank wall.
5. The lithium-ion battery electrolyte storage device according to claim 1, characterized in that, The top of the tank (1) is provided with an inlet (16) and an outlet (17), and the storage chamber (11) is provided with a pipe (18) that is connected to the inlet (16) and extends close to the partition (13).
6. The lithium-ion battery electrolyte storage device according to claim 1, characterized in that, An annular base (7) is installed at the bottom of the tank (1), and multiple concentric annular grooves (71) are provided below the base (7).
7. The lithium-ion battery electrolyte storage device according to claim 1, characterized in that, The bearing unit (2) includes a barrel (21), with a hole (211) at the center of the bottom of the barrel (21). Multiple upward-opening roller grooves (212) are distributed around the bottom of the barrel (21). Multiple balls (213) are placed in the roller grooves (212). The balls (213) are connected by a shaft (214) and roll in the roller grooves (212). One group of balls (213) is connected to a drive motor (215) through the shaft (214).
8. The lithium-ion battery electrolyte storage device according to claim 7, characterized in that, The side wall of the barrel (21) is provided with a vertical strip groove (216), and a roller (217) is rotatably installed in the strip groove (216).