调温装置和可充电电池
The temperature control unit, composed of a flexible membrane, uses the pressure of the temperature control fluid to uniformly squeeze the battery surface, solving the problem of uneven pressure caused by the expansion of individual battery cells, thus extending battery life and improving temperature control performance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Filing Date
- 2025-07-02
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, the expansion of individual battery cells leads to uneven pressure, which affects the lifespan of individual battery cells and results in poor temperature regulation.
The temperature control unit, which is made of a flexible membrane, achieves a basically constant pressure distribution by uniformly squeezing the battery surface with the pressure of the temperature control fluid. The flexible membrane covers at least 80% of the battery surface, and the temperature control fluid inlet and outlet are designed to control the fluid flow.
This achieves extended battery cell lifespan and uniform temperature regulation, thereby improving the overall battery lifespan and performance.
Smart Images
Figure CN224519965U_ABST
Abstract
Claims
1. A temperature regulating device for a rechargeable battery (100) having at least one prismatic battery cell (10), characterized in that The temperature control device (1) includes at least one flat temperature control unit (2), which has an internal volume for containing temperature control fluid defined at least partially by a flexible membrane. The internal volume is provided with a temperature control fluid inlet and a temperature control fluid outlet. The temperature control fluid can be input into the internal volume through the temperature control fluid inlet and output from the internal volume through the temperature control fluid outlet. The flexible membrane is configured such that, under the pressure of the temperature control fluid, the membrane surface of the flexible membrane presses against the battery surface of the rechargeable battery that is in contact with the membrane surface, or presses against the side surface of the corresponding prismatic battery cell that is in contact with the membrane surface.
2. The tempering device of claim 1, wherein The temperature control unit (2) has two membrane surfaces that are opposite each other.
3. The tempering device according to claim 1 or 2, characterized in that The temperature control unit (2) has an expansion pad (5) surrounded by a flexible film in the central region, the flexible film defining a recess for accommodating the expansion pad, the expansion pad (5) contacting the side surface of the corresponding prismatic battery cell (10).
4. The tempering device according to claim 1 or 2, characterized in that The temperature control unit (2) is composed solely of the flexible membrane, or the temperature control unit (2) also has a support member for supporting the flexible membrane.
5. The tempering device of claim 4, wherein The temperature control unit (2) has a surrounding support frame (6) and the flexible membrane is disposed within the support frame; or the temperature control unit (2) has a membrane reinforcement member (12) extending along the edge of the corresponding flexible membrane (11) and / or an internal support member (13) disposed in the internal volume.
6. The tempering device according to claim 1 or 2, characterized in that The flexible membrane covers at least 80% of the area of the side surface of the corresponding prismatic battery cell.
7. The tempering device according to claim 1 or 2, characterized in that The temperature control device constitutes a rechargeable battery (100) having multiple prismatic battery cells (10) arranged side by side.
8. The temperature regulating device according to claim 7, characterized in that, - For each pair of adjacent prismatic battery cells (10), the temperature regulating device (1) has a corresponding first temperature regulating unit disposed between the two prismatic battery cells. The first temperature regulating unit has two opposing membrane surfaces, and under the pressure of the temperature regulating fluid, each membrane surface presses against the side surface of the corresponding prismatic battery cell that is in contact with the membrane surface; and / or - For the external prismatic battery cell (10) of the rechargeable battery (100), the temperature regulating device has a corresponding second temperature regulating unit disposed outside the external prismatic battery cell, wherein, under the pressure of the temperature regulating fluid, a membrane surface of the second temperature regulating unit presses against the side surface of the external prismatic battery cell that is in contact with the membrane surface; and / or - For the battery surface of the rechargeable battery (100) which is composed of the narrow facets of each prismatic battery cell (10), the temperature control device (1) has a corresponding third temperature control unit disposed outside the battery surface, and under the pressure of the temperature control fluid, a membrane surface of the third temperature control unit presses the battery surface.
9. The tempering device of claim 7, wherein The temperature control device (1) includes a temperature control fluid inlet (3) and a temperature control fluid outlet (4) common to each temperature control unit. The temperature control fluid can be distributed to the temperature control fluid inlet of each temperature control unit (2) via the temperature control fluid inlet (3), and the temperature control fluid can be collected from the temperature control fluid outlet of each temperature control unit (2) to the temperature control fluid outlet (4).
10. The tempering device of claim 9, wherein The temperature-regulating fluid input accessory (3) and the temperature-regulating fluid output accessory (4) are arranged opposite each other with respect to the rechargeable battery (100), or the temperature-regulating fluid input accessory (3) and the temperature-regulating fluid output accessory (4) are arranged adjacent to each other.
11. The tempering device according to claim 1 or 2, characterized in that In the corresponding temperature control unit (2), a straight, annular or tortuous flow channel for temperature control fluid is formed in the internal volume.
12. The tempering device according to claim 1 or 2, characterized in that The temperature control device is configured as a cooling device for the battery.
13. The temperature regulating device according to claim 8, characterized in that, The third temperature control unit is disposed between the battery surface and the battery casing; or The third temperature regulating unit is disposed between two opposing battery surfaces. The third temperature regulating unit has two opposing film surfaces. Each battery surface is composed of the narrow face of a stacked prismatic battery cell. Under the pressure of the temperature regulating fluid, each film surface squeezes the corresponding battery surface.
14. A rechargeable battery having at least one prismatic battery cell (10), characterized in that The rechargeable battery has a temperature regulating device according to any one of claims 1 to 13.
15. The rechargeable battery of claim 14, wherein, The rechargeable battery is a power battery for electric motor vehicles, or the rechargeable battery is a battery module for a power battery in electric motor vehicles.