Liquid temperature control lithium battery system
Through the combination of a liquid temperature control system and flame-retardant thermal media block, the fire problem caused by high temperature of lithium batteries is solved, stable control and safety improvement of battery temperature are achieved, and the service life of the battery is extended.
Patent Information
- Application Number
- CN202420673463.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-02
AI Technical Summary
During use, lithium batteries are prone to fire and explosion due to high temperatures, causing personal and property losses.
A liquid temperature-controlled lithium battery system is designed, including a control unit, a detection unit and a lithium battery unit. The temperature control module is used to adjust the temperature using circulation pipes and liquid temperature regulation modules, and combined with flame retardant and thermal media blocks to avoid heat accumulation and Fire risk.
Effectively keep the battery pack within the appropriate temperature range, extend battery life, improve battery efficiency, prevent fires, and isolate oxygen through sealed boxes to reduce combustion risks.
Smart Images
Figure CN222168512U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium batteries, in particular to a liquid temperature-controlled lithium battery system. Background Art
[0002] As a new energy source, lithium battery has outstanding advantages such as long cycle life, high energy density, high open circuit voltage, low self-discharge, environmental protection, high charging efficiency, strong charging capacity, and easy portability. It is applied to various fields of society, such as the power battery market (electric two-wheeled vehicles, three-wheeled vehicles, sightseeing vehicles, vehicles for the disabled, new energy vehicles); consumer lithium battery market (power tools, digital products); energy storage lithium battery market (household energy storage, industrial and commercial energy storage), etc.
[0003] However, due to the long-term operation of lithium batteries and the defects of the product itself, the battery may catch fire or explode during use, causing immeasurable damage and loss to people and property. For this reason, we propose a liquid temperature-controlled lithium battery system. Utility Model Content
[0004] The utility model is to solve the shortcomings of the prior art and propose a liquid temperature-controlled lithium battery system. The liquid temperature-controlled and fire-preventive lithium battery system solves the problem that the high temperature of the lithium battery does not dissipate during use, which is prone to fire.
[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0006] A liquid temperature-controlled lithium battery system comprises a control unit, a detection unit and a lithium battery unit; wherein the control unit is used to control the information reception or information execution of the detection unit or the lithium battery unit; the detection unit is used to detect the working state and working environment in the lithium battery unit; the lithium battery unit is used to supply power to the detection unit or the control unit, and performs liquid temperature control itself.
[0007] Preferably, the lithium battery unit comprises a sealed box, a battery pack and a temperature control module; the battery pack is arranged in the sealed box, and the temperature control module is arranged between the sealed box and the battery pack.
[0008] Preferably, the battery pack comprises a battery cell, a nickel strip and a bus bar, the bus bar is arranged in a sealed box, the nickel strip is arranged on one side of the bus bar, and the battery cell is arranged on one side of the nickel strip.
[0009] Preferably, the temperature control module includes a control valve, a circulation pipe and a liquid temperature control module. The circulation pipe is arranged on one side of the sealing box, the liquid temperature control module is arranged on the outside of the circulation pipe, a plurality of control valves are arranged on the outside of the circulation pipe, and a micro pump is arranged on the outside of the circulation pipe and close to the liquid temperature control module.
[0010] Preferably, a flame retardant heat conductive medium block is provided in the sealed box, and the battery pack is embedded in the flame retardant heat conductive medium block.
[0011] Preferably, the detection unit includes a temperature sensor, a smoke sensor, a voltage sensor and an electrolyte leakage detection sensor; the temperature sensor is used to detect the temperature of the battery pack in the sealed box; the smoke sensor is used to detect whether there is smoke in the sealed box; the voltage sensor is used to detect the voltage state of the battery pack; the electrolyte leakage detection sensor is used to detect whether there is leakage in the battery pack.
[0012] Preferably, the liquid temperature control module comprises a micro heat exchanger, and the micro heat exchanger is used to control the temperature of the liquid in the circulation pipeline.
[0013] In summary, the utility model provides a temperature control module. When the battery pack in the sealed box generates high temperature, the liquid in the circulation pipe is heated and then sent to the liquid temperature control module (that is, the micro heat exchanger) through a micro pump for temperature replacement to form a cooling liquid. The cooling liquid is then transported to the circulation pipe in the sealed box, thereby providing a cooling function for the battery pack, avoiding the use of the battery due to heat accumulation, improving the battery life, and bringing into play the best efficiency of the battery. At the same time, it avoids the hidden danger of fire caused by heat accumulation in the battery, and can keep the temperature of the sealed box constant at the appropriate operating temperature of the battery pack for a long time.
[0014] The utility model provides a sealing box, which effectively isolates oxygen and effectively prevents the battery pack from burning.
[0015] The utility model provides a flame retardant heat conductive medium block so that the sealed box has a flame retardant heat conductive function, thereby improving the heat dissipation efficiency of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the framework structure of the lithium battery unit of the utility model;
[0017] Figure 2 It is a structural diagram of the system process of the utility model;
[0018] Figure 3 It is a schematic diagram of the framework structure of the detection unit of the utility model.
[0019] In the figure: 1. control valve; 2. battery cell; 3. nickel strip; 4. bus bar; 5. sealing box; 6. flame retardant thermal conductive medium block; 7. battery pack; 8. circulation pipeline; 9. liquid temperature control module. DETAILED DESCRIPTION
[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.
[0021] like Figure 1 As shown, the lithium battery unit includes a sealed box 5, a battery pack 7 and a temperature control module. The battery pack 7 is arranged in the sealed box 5. The temperature control module is arranged between the sealed box 5 and the battery pack 7. The battery pack 7 includes a battery cell 2, a nickel strip 3 and a bus 4. The bus 4 is arranged in the sealed box 5, the nickel strip 3 is arranged on one side of the bus 4, and the battery cell 2 is arranged on one side of the nickel strip 3. The temperature control module includes a control valve 1, a circulation pipe 8 and a liquid temperature control module 9. The circulation pipe 8 is arranged on one side of the sealed box 5. The liquid temperature control module 9 is arranged on the outside of the circulation pipe 8. Several control valves 1 are arranged on the outside of the circulation pipe 8. A micro pump is arranged on the outside of the circulation pipe 8 and close to the liquid temperature control module 9. A flame-retardant heat-conducting medium block 6 is arranged in the sealed box 5. The battery pack 7 is embedded in the flame-retardant heat-conducting medium block 6. The liquid temperature control module 9 includes a micro heat exchanger, which is used to control the temperature of the liquid in the circulation pipe 8.
[0022] like Figure 2-Figure 3 As shown, a liquid temperature-controlled lithium battery system includes a control unit, a detection unit and a lithium battery unit; wherein the control unit is used to control the information reception or information execution of the detection unit or the lithium battery unit; the detection unit is used to detect the working state and working environment in the lithium battery unit; the lithium battery unit is used to power the detection unit or the control unit and perform liquid temperature control by itself, and the detection unit includes a temperature sensor, a smoke sensor, a voltage sensor and an electrolyte leakage detection sensor; the temperature sensor is used to detect the temperature of the battery pack 7 in the sealed box 5; the smoke sensor is used to detect whether there is smoke in the sealed box 5; the voltage sensor is used to detect the voltage state of the battery pack 7; the electrolyte leakage detection sensor is used to detect whether there is leakage in the battery pack 7.
[0023] In this embodiment, by setting up a temperature control module, when the battery pack 7 in the sealed box 5 generates high temperature, the liquid in the circulation pipe 8 is heated, and then sent to the liquid temperature control module 9 (that is, the micro heat exchanger) through a micro pump for temperature replacement to form a cooling liquid, which is then transported to the circulation pipe 8 placed in the sealed box 5 to cool the battery pack 7, thereby avoiding the use of the battery due to heat accumulation, improving the battery life, and giving full play to the optimal efficiency of the battery, while avoiding the hidden danger of fire caused by battery heat accumulation.
[0024] In this embodiment, under different emptying conditions, the control unit can control the control valves 1 at different positions to open or close, so that the lithium battery unit works in different modes:
[0025] Normative Model
[0026] The temperature of the battery pack 7 is within a suitable range, and the temperature environment in the sealed box 5 does not need to be heated up or cooled down. The heat generated by the battery pack 7 can be transferred by the flame-retardant thermal conductive medium block 6 in the sealed box 5, and the heat can be discharged from the outside of the sealed box 5.
[0027] Liquid temperature control mode
[0028] When the detection unit detects that the temperature of the battery pack 7 in the sealed box 5 is too high or too low, the liquid temperature control module 9 starts working, and the micro pump extracts the circulating liquid in the circulation pipe 8 in the flame-retardant thermal conductive medium block 6 in the sealed box 5, and flows it back to the liquid temperature control module 9. After the liquid temperature control module 9 heats or cools the circulating fluid, it flows back to the sealed box 5 to heat or cool it, thereby adjusting the temperature inside the sealed box 5.
[0029] When the temperature in the sealed box 5 is too low, the liquid temperature control module 9 heats the circulating fluid in the circulation pipe 8 to change the temperature environment in the sealed box 5 and increase the temperature in the sealed box 5 to meet the normal working environment of the battery pack 7.
[0030] When the temperature in the sealed box 5 is too high, the liquid temperature control module 9 cools the circulating fluid in the circulating pipe 8, thereby changing the temperature environment in the sealed box 5, cooling the sealed box 5, and circulating heat conduction takes away the heat in the sealed box 5, thereby reducing the heat of the battery pack 7, reducing the possibility of heat accumulation in the battery pack 7, and avoiding the heat accumulation of the battery pack 7 affecting normal use.
[0031] It should be noted that the control unit includes a controller.
[0032] The controller proposed in this application is a prior art, and its specific usage and functions are not described in detail in this article.
[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.
Claims
1. A liquid temperature-controlled lithium battery system, characterized in that: It includes a control unit, a detection unit and a lithium battery unit; The control unit is used to control the information reception or information execution of the detection unit or the lithium battery unit; The detection unit is used to detect the working status and working environment inside the lithium battery unit; The lithium battery unit is used to power the detection unit or the control unit, and also performs liquid temperature control itself.
2. The liquid temperature controlled lithium battery system according to claim 1, characterized in that: The lithium battery unit comprises a sealed box (5), a battery pack (7) and a temperature control module. The battery pack (7) is arranged in the sealed box (5), and the temperature control module is arranged between the sealed box (5) and the battery pack (7).
3. The liquid temperature controlled lithium battery system according to claim 2, characterized in that: The battery pack (7) comprises a battery cell (2), a nickel strip (3) and a busbar (4); the busbar (4) is arranged in a sealed box (5); the nickel strip (3) is arranged on one side of the busbar (4); and the battery cell (2) is arranged on one side of the nickel strip (3).
4. The liquid temperature controlled lithium battery system according to claim 2, characterized in that: The temperature control module comprises a control valve (1), a circulation pipe (8) and a liquid temperature control module (9); the circulation pipe (8) is arranged on one side of the sealing box (5); the liquid temperature control module (9) is arranged on the outside of the circulation pipe (8); a plurality of control valves (1) are arranged on the outside of the circulation pipe (8); and a micro pump is arranged on the outside of the circulation pipe (8) and close to the liquid temperature control module (9).
5. The liquid temperature controlled lithium battery system according to claim 2, characterized in that: A flame-retardant heat-conducting medium block (6) is provided in the sealed box (5), and the battery pack (7) is embedded in the flame-retardant heat-conducting medium block (6).
6. The liquid temperature controlled lithium battery system according to claim 2, characterized in that: The detection unit includes a temperature sensor, a smoke sensor, a voltage sensor and an electrolyte leakage detection sensor; The temperature sensor is used to detect the temperature of the battery pack (7) in the sealed box (5); The smoke sensor is used to detect whether smoke exists in the sealed box (5); The voltage sensor is used to detect the voltage state of the battery pack (7); The electrolyte leakage detection sensor is used to detect whether the battery pack (7) has leakage.
7. The liquid temperature-controlled lithium battery system according to claim 4, characterized in that: The liquid temperature control module (9) comprises a micro heat exchanger, and the micro heat exchanger is used to perform temperature control operations on the liquid in the circulation pipe (8).