Bimetal radiator for automobile starting power supply
By utilizing passive and active metal sheets with different thermal expansion characteristics through a bimetallic heat sink, combined with a silicone heating film, heat dissipation is achieved within the battery casing, solving the problem of poor heat dissipation in lithium-ion truck starting power supplies during summer. This results in high reliability and stability, and IPX7 protection to withstand vibration environments.
Patent Information
- Application Number
- CN202422812144.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-19
- Publication Date
- 2025-11-18
- Estimated Expiration
- 2034-11-19
AI Technical Summary
Existing lithium-ion truck starting power supplies suffer from poor heat dissipation during summer use, leading to overheating of the battery cells and affecting normal operation. Furthermore, conventional active cooling methods are often bulky, structurally complex, or impractical in vibration environments.
A bimetallic heat sink is adopted, which utilizes the difference in thermal expansion characteristics between passive and active metal plates to achieve heat dissipation through heat conduction. Combined with a silicone heating film inside the battery casing, heat dissipation is completed, meeting the requirements for sealing and vibration resistance.
It achieves high reliability and high stability heat dissipation, meets IPX7 protection requirements, avoids problems of complex structure and high cost, and is adaptable to vibration environment.
Smart Images
Figure CN223566698U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a battery heat dissipation device, especially a bimetallic radiator for automobile starting power supply. BACKGROUND
[0002] At present, when the lithium battery truck starting power supply is used in summer, the battery core body will heat up due to the need for continuous work (discharge), and the battery temperature rise may trigger the BMS thermal protection mechanism in the starting power supply, which will affect the normal use of the starting power supply. The existing lithium battery starting power supply needs to meet the IPX7 protection requirement because of the rain and dust in the outdoor use environment, and the lithium battery and BMS itself are afraid of the rain and dust environment, so the battery shell needs to meet the IPX7 protection requirement. Due to the size limitation of the truck starting battery compartment, the current lithium battery starting power supply is mainly cooled by passive cooling.
[0003] However, the current starting power supply has the problem of poor heat dissipation or even battery core overheating protection when used in summer, which affects the normal use of the product. The conventional active cooling method, such as liquid cooling, has the problems of large volume and complex structure. The air cooling scheme has no feasibility due to the strong vibration of the battery pack use environment, rain, dust and space limitation of the battery compartment. SUMMARY
[0004] The utility model aims to provide a bimetallic radiator for automobile starting power supply, which has the advantages of high reliability, high stability, meeting the sealing requirement of the battery shell, anti-vibration, low cost and small volume.
[0005] The above technical purpose of the utility model is realized by the following technical scheme:
[0006] A bimetallic radiator for automobile starting power supply based on automobile starting power supply, the automobile starting power supply includes a sealed battery shell and a battery module located inside the battery shell, and includes a passive metal sheet and an active metal sheet.
[0007] The vertical section of the passive metal sheet is "concave", the battery module is fixed inside the "concave" opening of the passive metal sheet, the battery module abuts against the inner side wall of the passive metal sheet, and the side wall top of the passive metal sheet is provided with a bent edge at the side wall of the battery shell, the vertical section of the bent edge is "U" shaped, the "U" shaped opening of the bent edge is downward, and the side of the bent edge close to the battery shell is provided with a heat conducting glue.
[0008] The vertical section of the active metal sheet is "U" shaped, the "U" shaped opening of the active metal sheet is downward, and the active metal sheet is fixed inside the "U" shaped opening of the passive metal sheet.
[0009] The preferred scheme is as follows:
[0010] Preferably, the bottom of the battery shell is fixed with a heating film, and the heating film is fixed between the bottom of the battery shell and the passive metal sheet.
[0011] Preferably, the active metal sheet and the inner side wall of the U-shaped opening of the bent edge are both provided with an included angle.
[0012] In summary, the utility model discloses a double metal sheet as an inductive element, with high reliability and high stability, under normal working conditions, the thermal expansion characteristics of the double metal sheet are stable, and misoperation and failure are not prone to occur. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 is the front view of the passive metal sheet and the active metal sheet of the embodiment in a non-working state.
[0014] Figure 2 is the front view of the passive metal sheet and the active metal sheet of the embodiment in a working state.
[0015] In the figure, 1 is an automobile starting power supply, 2 is a battery shell, 3 is a battery module, 4 is a passive metal sheet, 5 is an active metal sheet, 6 is a bent edge, 7 is a heat-conducting adhesive, and 8 is a heating film. DETAILED DESCRIPTION
[0016] The utility model will be further described in detail below in combination with the drawings.
[0017] Wherein, same parts are indicated by same reference numerals. It should be noted that the words "front", "back", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings.
[0018] A double metal heat radiator for an automobile starting power supply, as shown in Figure 1 , Figure 2 The double metal heat radiator is based on an automobile starting power supply 1, and the automobile starting power supply 1 comprises a sealed battery shell 2 and a battery module 3 located inside the battery shell 2.
[0019] The double metal heat radiator comprises a passive metal sheet 4 and an active metal sheet 5.
[0020] The passive metal sheet 4 is a plate with a "concave" shape in the transverse vertical section, the battery module 3 is fixed inside the "concave" opening of the passive metal sheet 4, the battery module 3 abuts against the inner side wall of the passive metal sheet 4, and the top of the side wall of the passive metal sheet 4 is provided with a bent edge 6 at the side wall of the battery shell 2, the vertical section of the bent edge 6 is "U" shaped, the "U" shaped opening of the bent edge 6 is downward, and the side of the bent edge 6 close to the battery shell 2 is provided with a heat-conducting adhesive 7;
[0021] The vertical section of the active metal sheet 5 is "U" shaped, the "U" shaped opening of the active metal sheet 5 is downward, the active metal sheet 5 is fixed inside the "U" shaped opening of the passive metal sheet 4, and the active metal sheet 5 is fixed to the passive metal sheet 4 by being close to one end of the battery module 3 and being free at the other end of the battery shell, which can ensure that the active metal sheet 5 and the passive metal sheet 4 can be freely bent, and the fixed mode of the active metal sheet 5 close to one end of the battery module 3 includes but is not limited to mechanical rolling and welding.
[0022] The bimetallic heat sink is a composite material formed by tightly combining two or more layers of metal or alloy materials with different thermal expansion coefficients. These metal sheets include but are not limited to manganese-nickel-copper alloy, nickel-chromium-iron alloy, nickel-manganese-iron alloy, nickel, and nickel-iron alloy. The thermal expansion coefficient of nickel-manganese-copper alloy is usually between 15×10 -6 / ℃ and 17×10 -6 / ℃; the thermal expansion coefficient of nickel-chromium-iron alloy is usually 16×10 -6 / ℃ at 20-500℃; the thermal expansion coefficient of 4J50 alloy, an iron-nickel fixed expansion alloy, is 9.8×10 -6 / ℃ within the range of 20-100℃; the linear expansion coefficient of nickel alloy is about 13.5×10 -6 / ℃ within the temperature range of 500℃ to 1000℃; and the thermal expansion coefficient of nickel-iron alloy is generally 11.8×10 -6 / ℃ at normal temperature (e.g., 20℃).
[0023] When the passive metal sheet 4 and the active metal sheet 5 are selected, the active layer selects a metal sheet with a large expansion coefficient, and the passive layer selects a metal sheet with a small expansion coefficient. The active metal sheet 5 and the inner side wall of the "U" shaped opening of the bent edge 6 are both provided with an included angle, and the initial angle between the active metal sheet 5 and the inner side wall of the "U" shaped opening of the bent edge 6 is 8°, that is, the side of the bent edge 6 close to the battery shell 2 does not abut against the shell in the initial state, and after being heated, the inner side walls of the "U" shaped openings of the active metal sheet 5 gradually become flat with each other, and the angle is 0. At this time, the inner side walls of the "U" shaped openings of the bent edge 6 of the passive metal sheet 4 are gradually pushed to become flat with each other, so that the heat-conducting adhesive 7 of the bent edge 6 abuts against the inner side wall of the battery shell 2.
[0024] In order to facilitate the passive metal sheet 4, the active metal sheet 5 to expand, the thickness of the passive metal sheet 4, the active metal sheet 5 is between 0.8-1.2mm.
[0025] The bottom of the battery shell 2 is fixedly provided with a heating film 8, the heating film 8 is fixed between the bottom of the battery shell 2 and the passive metal sheet 4, the heating film 8 is a silica gel heating film 8, the silica gel heating film 8 is a heating element, adopts high-purity liquid silica gel, is vulcanized by high temperature, has the characteristics of high temperature resistance, corrosion resistance, non-toxic and odorless, etc., the silica gel heating film 8 has good softness, can be in close contact with the heated object, ensures the effective transfer of heat, so that in cold days, it heats the battery module 3, because it is close to the bottom of the passive metal sheet 4, its temperature can be quickly transmitted to the passive metal sheet 4, the passive metal sheet 4 can heat the battery module 3 from the side, accelerate the operation of the battery module 3, at the same time, because the silica gel heating film 8 has good softness, it can make the passive metal sheet 4 more closely contact with the bottom of the battery module 3, the passive metal sheet 4 contacts the bottom of the battery module 3 more evenly.
[0026] Specific implementation process:
[0027] When the battery module 3 rises, the temperature is transmitted to the active metal sheet 5 through the passive metal sheet 4, the active metal sheet 5 will expand more than the passive metal sheet 4, the difference makes the passive metal sheet 4, the active metal sheet 5 bend, the bending direction is usually bent towards the free end of the passive metal sheet 4, the active metal sheet 5, that is, the side close to the battery shell is bent;
[0028] When the passive metal sheet 4 is bent and makes the heat-conducting adhesive 7 contact with the battery shell 2, the temperature is transmitted to the shell in the form of heat conduction, the heat dissipation area is increased, the initial angle of the inner side wall of the "U" shaped opening of the active metal sheet 5 and the bending edge 6 of the passive metal sheet 4 is 8°, after being heated, the inner side walls of the "U" shaped opening of the active metal sheet 5 gradually become flat, the angle is 0, the inner side walls of the "U" shaped opening of the bending edge 6 of the passive metal sheet 4 are gradually pushed to become flat, finally the heat-conducting adhesive 7 of the bending edge 6 abuts against the inner side wall of the battery shell 2, the process is completed in the battery shell 2, no gas exchange occurs, the possibility of dust and water vapor entering the battery shell 2 is avoided, the heat exceeding the set threshold value is indirectly discharged out of the battery pack through the battery shell 2, the heat dissipation requirement of the battery module 3 of the automobile starting power supply 1 is realized.
[0029] The specific embodiment is only an explanation of the utility model, and it is not a limitation of the utility model, and those skilled in the art can make modifications without creative contribution after reading the specification, but as long as it is within the scope of the claims of the utility model, it is protected by the patent law.
Claims
1. A bimetallic heat sink for a starter power supply for a vehicle, based on a starter power supply (1) for a vehicle, the starter power supply (1) comprising a sealed battery housing (2) and a battery module (3) located inside the battery housing (2), characterized in that: Including passive metal sheet (4), active metal sheet (5); The vertical section of the passive metal sheet (4) is "concave", the battery module (3) is fixed inside the "concave" opening of the passive metal sheet (4), the battery module (3) is in contact with the inner side wall of the passive metal sheet (4), the top of the side wall of the passive metal sheet (4) is provided with a bending edge (6) at the side wall of the battery shell (2), the vertical section of the bending edge (6) is "U" shaped, the "U" shaped opening of the bending edge (6) is downward, and the side of the bending edge (6) close to the battery shell (2) is provided with heat-conducting glue (7); The vertical section of the active metal sheet (5) is "U" shaped, the "U" shaped opening of the active metal sheet (5) is downward, and the active metal sheet (5) is fixed inside the "U" shaped opening of the passive metal sheet (4).
2. The bimetallic heat sink for a vehicle starting power supply according to claim 1, characterized in that: The bottom of the battery shell (2) is fixedly provided with a heating film (8), and the heating film (8) is fixed between the bottom of the battery shell (2) and the passive metal sheet (4).
3. The bimetallic heat sink for a vehicle starting power supply according to claim 1, characterized in that: The active metal sheet (5) and the inner side wall of the "U" shaped opening of the bending edge (6) are provided with an included angle.