Lithium battery phase change thermal management device based on temperature identification and wind regulation
Through the lithium battery phase change heat management device based on temperature identification and wind regulation, the temperature acquisition module and control module are used to adjust the temperature of the lithium battery, the problem of heat accumulation in the heat absorption process of lithium batteries is solved, and temperature stability and safety are achieved Improvement.
Patent Information
- Application Number
- CN202420949160.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2034-04-30
AI Technical Summary
The existing lithium battery phase change heat management devices are prone to the problem of heat accumulation and inability to be discharged in time during the heat absorption process, which poses safety hazards, especially when the battery heats up sharply.
The lithium battery phase change thermal management device based on temperature identification and wind regulation is adopted, including a temperature acquisition module and two control modules, the battery pack and ambient temperature are detected by the thermistor, and the air is performed using the first control module and the second control module. Heating or refrigerating, adjusting the working temperature of the lithium battery, reducing temperature differences, and ensuring stable battery operation.
Effectively maintain the working temperature stability of lithium batteries, reduce the possibility of temperature differences, improve safety and temperature adjustment effects, and avoid safety hazards caused by the sharp rise in the battery.
Smart Images
Figure CN222261193U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, and in particular to a lithium battery phase change thermal management device based on temperature recognition and wind regulation. Background Art
[0002] The wave of automobile electrification is booming. Lithium batteries are widely used due to their high energy density and long service life. However, lithium batteries have strict requirements on the working environment temperature, which leads to thermal runaway during the charging and discharging process, causing problems such as mileage anxiety. In severe cases, they may cause major safety accidents such as fire and explosion, which seriously threaten the life safety of drivers. At present, the market adopts the method of phase change material thermal management to solve this problem, but there is still the problem that when the phase change material reaches the maximum phase change rate during the heat absorption process, heat accumulation cannot be discharged in time.
[0003] For example, the patent announcement number is CN206602153U, and its name is a phase-change thermal management assembly structure for a bicycle lithium battery. It adopts two pairs of plastic brackets, and its main body is a flat structure. The inner surfaces of the two pairs of plastic brackets are opposite to each other; a plurality of cylindrical battery cells are clamped between the two plastic brackets, and the battery cells are generally parallel to each other; and a plurality of phase-change thermal conductive columns are inserted in the gaps between adjacent battery cells; through the above scheme, the heat generated during the charging and discharging process of the battery cell is directly absorbed and stored by the phase-change thermal conductive columns; during the temperature rise of the phase-change thermal conductive columns, the phase-change thermal conductive columns conduct the absorbed heat to the outside, thereby reducing the temperature of the battery cell and reducing the possibility of temperature accumulation inside the battery pack. However, this scheme ignores the possibility of rapid temperature rise of the battery, and there is a safety hazard. Utility Model Content
[0004] The technical problem to be solved by the utility model is: in order to overcome the problem that the prior art ignores the possibility of rapid temperature rise of the battery and has potential safety hazards, a lithium battery phase change thermal management device based on temperature recognition and wind control is provided.
[0005] The technical solution adopted by the utility model to solve its technical problem is: a lithium battery phase change thermal management device based on temperature recognition and wind control, including a temperature acquisition module, a first control module for controlling the battery temperature and a second control module for controlling the battery temperature, the first control module and the second control module are connected on the left side;
[0006] The first control module includes an upper cover plate, a first air plate, a plurality of brackets and a plurality of heat-conducting parts. The brackets are in a stacked structure. The brackets and the heat-conducting parts are arranged alternately. The heat-conducting parts are arranged between two adjacent brackets. The upper cover plate is fixedly connected to the bracket located at the top. The first air plate is fixedly connected to the left side of the bracket. There is a gap in the bracket to divide the internal space of the bracket into a plurality of installation areas for placing batteries. There is a battery pack in the installation area, and the remaining area of the installation area is filled with phase change material.
[0007] The temperature acquisition module corresponds to the battery pack one by one. The temperature acquisition module is used to collect the temperature of the corresponding battery pack and the external ambient temperature, so as to collect the ambient temperature outside the device and the operating temperature around the battery pack. The air is heated or cooled by the first control module and the second control module, so that the operating temperature of the lithium battery is adjusted by feedback during the thermal management of the phase change material, reducing the possibility of temperature differences during operation, thereby maintaining the stability of the lithium battery operation. The utility model has a simple structure, is safe and stable, and has a good temperature adjustment effect.
[0008] In order to solve the problem of how the first wind plate controls the cooling rate of the battery pack and maintains the operating temperature of the battery pack, the first wind plate is further provided with a first through hole for fluid to pass through, and the first through hole is provided with a first baffle for controlling the opening degree of the first through hole, and the first baffle is connected to the first wind plate through a driving member.
[0009] It further includes a heat conducting member extending into the first control module near one side of the first control module.
[0010] The invention further comprises that the phase change material has pores and the phase change material is boron hybrid polysiloxane.
[0011] The invention further comprises a heat conducting member which is a copper plate.
[0012] It further includes a temperature acquisition module including a thermistor, the thermistor of the temperature acquisition module for detecting the battery pack is arranged between the positive poles of the battery pack, and the thermistor of the temperature acquisition module for detecting the battery pack is located outside the battery pack.
[0013] In order to solve the problem of how the two control modules control the temperature of the battery pack, the second control module further includes a second air plate, a cooling plate and a fan connected in sequence. The fan is installed on the left side of the bracket. The air outlet end of the second air plate faces the air inlet end of the first air plate. The second air plate is provided with a second through hole for fluid to pass through. The second through hole is provided with a second baffle for controlling the opening degree of the second through hole. The second baffle is connected to the second air plate through a driving member, and the cooling plate is provided with a flow hole for fluid to pass through.
[0014] It further comprises a bracket protruding from a post, the first air plate, the upper cover plate and the fan are all provided with a slot matching the post, and the post is arranged in the corresponding slot.
[0015] It further includes a main controller on the upper cover plate for controlling equipment in the thermal management device.
[0016] It further includes a third through hole for fluid to pass through on the upper cover plate, a third baffle for controlling the opening degree of the third through hole at the third through hole, the third baffle is connected to the upper cover plate through a driving member, and the third through hole is located above the intersection of the bracket gaps.
[0017] The beneficial effects of the utility model are as follows: the utility model provides a lithium battery phase change thermal management device based on temperature recognition and wind regulation, which realizes the ambient temperature outside the acquisition device and the operating temperature around the battery pack, and heats or cools the air through the first control module and the second control module, so that the operating temperature of the lithium battery is simultaneously fed back and adjusted during the thermal management of the phase change material, reducing the possibility of temperature differences during operation, thereby maintaining the stability of the lithium battery operation. The utility model has a simple structure, is safe and stable, and has a good temperature adjustment effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0019] Figure 1 It is a structural schematic diagram of the utility model;
[0020] Figure 2 It is an enlarged structural diagram of the bracket of the first control module of the utility model.
[0021] In the figure: 1. Temperature acquisition module,
[0022] 2. first control module, 21. upper cover, 211. third through hole, 212. third baffle, 22. first air plate, 221. first through hole, 222. first baffle, 23. bracket, 231. gap, 232. installation area, 233. card column, 24. heat conducting member, 25. battery pack, 26. phase change material, 27. main controller,
[0023] 3. Second control module, 31. Second air plate, 311. Second through hole, 312. Second baffle, 32. Refrigeration plate, 321. Flow hole, 33. Fan, 34. Card slot. DETAILED DESCRIPTION
[0024] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.
[0025] like Figure 1 It is a structural schematic diagram of the utility model, a lithium battery phase change thermal management device based on temperature recognition and wind control, including a temperature acquisition module 1, a first control module 2 for controlling the battery temperature, and a second control module 3 for controlling the battery temperature;
[0026] like Figure 1 , Figure 2 As shown, the first control module 2 includes an upper cover plate 21, a first air plate 22, a plurality of brackets 23 and a plurality of heat-conducting members 24. The bracket 23 is a stacked structure. In the present application, the bracket 23 has three layers and its corresponding heat-conducting members 24 have two. In this regard, the present application does not specifically limit the number of brackets 23 and heat-conducting members 24, and can be adjusted according to actual usage. The brackets 23 and heat-conducting members 24 are arranged alternately, and the heat-conducting members 24 are arranged between two adjacent brackets 23. The heat-conducting members 24 extend into the first control module 2 close to one side of the first control module 2. This design can speed up the heat exchange speed and realize phase change thermal management of lithium batteries. The heat-conducting member 24 is a copper plate, and the heat-conducting member 24 can also be coated with thermal grease.
[0027] like Figure 1 , Figure 2 As shown, the bracket 23 has a gap 231 that divides the internal space of the bracket 23 into a number of installation areas 232 for placing batteries. In the present application, the gap 231 is arranged in a 2*2 horizontal and vertical structure to divide the bracket 23 into nine installation areas 232. The gap 231 can provide air circulation. The installation area 232 has a battery pack 25, which is a lithium battery pack, and the remaining area of the installation area 232 is filled with a phase change material 26. The phase change material 26 has pores that can provide air circulation. The phase change material 26 is a boron hybrid polysiloxane, which changes its material state with temperature and can provide latent heat. During the phase change process, the phase change material absorbs or releases a large amount of latent heat.
[0028] A card column 233 is protruded from the bracket 23, and the first wind plate 22, the second wind plate 31, the upper cover plate 21 and the fan 33 all have a card slot 34 matching the card column 233. The card column 233 is arranged in the corresponding card slot 34, and the first wind plate 22, the second wind plate 31, the upper cover plate 21 and the fan 33 can also be fixed by welding.
[0029] like Figure 1As shown, the first wind plate 22 is fixedly connected to the left side of the bracket 23, the first wind plate 22 is provided with a first through hole 221 for fluid to pass through, the first through hole 221 is provided with a first baffle 222 for controlling the opening degree of the first through hole 221, the first baffle 222 is connected to the first wind plate 22 through a driving member, the driving member is a motor, the driving member provides power for the rotation of the first baffle 222, the first baffle 222 can also be rotatably connected to the first wind plate 22 to increase stability.
[0030] The upper cover plate 21 is fixedly connected to the bracket 23 located at the top, and a main controller 27 for controlling the equipment in the thermal management device is provided on the upper cover plate 21 .
[0031] like Figure 1 As shown, the upper cover plate 21 is provided with a third through hole 211 for fluid to pass through, and the third through hole 211 is provided with a third baffle 212 for controlling the opening degree of the third through hole 211. The third baffle 212 is connected to the upper cover plate 21 through a driving member, and the third through hole 211 is located above the intersection of the gap 231 of the bracket 23. The driving member is a motor, and the driving member provides power for the rotation of the third baffle 212. The third baffle 212 can also be rotatably connected to the upper cover plate 21 to increase stability.
[0032] like Figure 1 As shown, the temperature acquisition module 1 corresponds to the battery pack 25 one by one, and the temperature acquisition module 1 is used to collect the temperature of the corresponding battery pack 25 and the external environment temperature. The temperature acquisition module 1 includes a thermistor, and the thermistor of the temperature acquisition module 1 for detecting the battery pack 25 is arranged between the positive poles of the battery pack 25, and the thermistor of the temperature acquisition module 1 for detecting the battery pack 25 is located outside the battery pack 25.
[0033] The first control module 2 is connected to the left side of the second control module 3. The second control module 3 includes a second air plate 31, a cooling fin 32 and a fan 33 connected in sequence. The fan 33 is installed on the left side of the bracket 23. The air outlet end of the second air plate 31 faces the air inlet end of the first air plate 22. The second air plate 31 has a second through hole 311 for fluid to pass through. The second through hole 311 has a second baffle 312 for controlling the opening degree of the second through hole 311. The second baffle 312 is connected to the second air plate 31 through a driving member. The cooling fin 32 has a flow hole for fluid to pass through. 321, the cooling fin 32 is used for heating or cooling air, the driving member is a motor, the driving member provides power for the rotation of the second baffle 312, the second baffle 312 can also be rotatably connected with the first wind plate 22 to increase stability; the cooling fin 32 is a semiconductor cooling fin, the second control module 3 can also include a shell, the shell is used to cover and fix the second wind plate 31, the cooling fin 32 and the fan 33, there is a gap between the second wind plate 31 and the cooling fin 32 for the second baffle 312 to rotate, the fan 33, the second wind plate 31 and the cooling fin 32 can be fixed by welding.
[0034] The device collects the ambient temperature outside the device and the operating temperature around the battery pack, heats or cools the air through the first control module 2 and the second control module 3, and simultaneously feedbacks and adjusts the operating temperature of the lithium battery during the thermal management of the phase change material, thereby reducing the possibility of temperature differences during operation, thereby maintaining the stability of the lithium battery operation. The device has a simple structure, is safe and stable, and has a good temperature adjustment effect.
[0035] The overall situation of this device is that the temperature acquisition module 1 collects the ambient temperature and the temperature of the battery pack 25, and transmits the temperature situation to the main controller 27, and the main controller 27 controls the startup of the first control module 2 and the second control module 3.
[0036] When the difference between the ambient temperature detected by the temperature acquisition module 1 between the positive poles of the battery pack 25 and the temperature of the battery pack 25 does not exceed 50°C, the overall device is in the general mode. At this time, when the ambient temperature collected by the thermistor exceeds 25°C, the main controller 27 controls the first baffle 222, the second baffle 312 and the third baffle 212 to expand slightly, the semiconductor refrigeration sheet 32 performs low-power refrigeration, and the fan 33 operates at low power, turning on the low-power refrigeration mode;
[0037] When the ambient temperature is lower than 0°C, the main controller 27 controls the first baffle 222, the second baffle 312 and the third baffle 212 to expand slightly, the semiconductor cooling sheet 32 heats at low power, the fan 33 runs at low power, and the low-power heat preservation mode is turned on;
[0038] When the thermistor detects that the temperature difference of the battery pack exceeds 50°C, the entire device is in emergency mode, the main controller 27 controls the first baffle 222, the second baffle 312 and the third baffle 212 to be fully unfolded, the semiconductor refrigeration plate 32 performs high-power cooling, the fan 33 runs at high power, and the high-efficiency cooling mode is turned on.
[0039] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.
Claims
1. A lithium battery phase change thermal management device based on temperature recognition and wind control, characterized in that: It comprises a temperature acquisition module (1), a first control module (2) for controlling the battery temperature, and a second control module (3) for controlling the battery temperature, wherein the first control module (2) and the second control module (3) are connected on the left side; The first control module (2) comprises an upper cover plate (21), a first air plate (22), a plurality of brackets (23) and a plurality of heat-conducting members (24); the brackets (23) are in a stacked structure; the brackets (23) and the heat-conducting members (24) are arranged in a staggered manner; the heat-conducting members (24) are arranged between two adjacent brackets (23); the upper cover plate (21) is fixedly connected to the bracket (23) located at the top; the first air plate (22) is fixedly connected to the left side of the bracket (23); the bracket (23) has a gap (231) therein to divide the internal space of the bracket (23) into a plurality of installation areas (232) for placing batteries; the installation area (232) has a battery pack (25); and the remaining area of the installation area (232) is filled with a phase change material (26); The temperature acquisition module (1) corresponds to the battery pack (25) on a one-to-one basis, and the temperature acquisition module (1) is used to acquire the temperature of the corresponding battery pack (25) and the external environment temperature.
2. A lithium battery phase change thermal management device based on temperature recognition and wind control as claimed in claim 1, characterized in that: The first air plate (22) has a first through hole (221) for allowing fluid to pass through, and the first through hole (221) has a first baffle (222) for controlling the opening degree of the first through hole (221), and the first baffle (222) is connected to the first air plate (22) via a driving member.
3. A lithium battery phase change thermal management device based on temperature recognition and wind control as claimed in claim 1, characterized in that: The heat conducting member (24) extends into the first control module (2) close to one side of the first control module (2).
4. A lithium battery phase change thermal management device based on temperature recognition and wind control as claimed in claim 1, characterized in that: The phase change material (26) has pores and is boron hybrid polysiloxane.
5. A lithium battery phase change thermal management device based on temperature recognition and wind control as claimed in claim 1, characterized in that: The heat conducting member (24) is a copper plate.
6. A lithium battery phase change thermal management device based on temperature recognition and wind control as claimed in claim 1, characterized in that: The temperature acquisition module (1) comprises a thermistor, wherein the thermistor of the temperature acquisition module (1) for detecting the battery pack (25) is arranged between the positive poles of the battery pack (25), and the thermistor of the temperature acquisition module (1) for detecting the battery pack (25) is located outside the battery pack (25).
7. A lithium battery phase change thermal management device based on temperature recognition and wind control as claimed in claim 1, characterized in that: The second control module (3) comprises a second air plate (31), a cooling fin (32) and a fan (33) which are connected in sequence, the fan (33) being installed on the left side of the bracket (23), the air outlet end of the second air plate (31) facing the air inlet end of the first air plate (22), the second air plate (31) having a second through hole (311) for fluid to pass through, the second through hole (311) having a second baffle (312) for controlling the opening degree of the second through hole (311), the second baffle (312) being connected to the second air plate (31) via a driving member, and the cooling fin (32) having a flow hole (321) for fluid to pass through.
8. A lithium battery phase change thermal management device based on temperature recognition and wind control as claimed in claim 7, characterized in that: A card column (233) is protruded from the bracket (23); the first wind plate (22), the second wind plate (31), the upper cover plate (21) and the fan (33) all have a card slot (34) matching the card column (233); and the card column (233) is arranged in the card slot (34) corresponding to it.
9. A lithium battery phase change thermal management device based on temperature recognition and wind control as claimed in claim 1, characterized in that: The upper cover plate (21) is provided with a main controller (27) for controlling equipment in the thermal management device.
10. A lithium battery phase change thermal management device based on temperature recognition and wind control as claimed in claim 1, characterized in that: The upper cover plate (21) is provided with a third through hole (211) for allowing fluid to pass through, and the third through hole (211) is provided with a third baffle (212) for controlling the opening degree of the third through hole (211), and the third baffle (212) is connected to the upper cover plate (21) via a driving member, and the third through hole (211) is located above the intersection of the gaps (231) of the bracket (23).