The present application relates to a thermal management system of a battery pack, particularly to a thermal management system of a battery pack applied to heat exchange.
Chinese patent invention No. 104617352 discloses a build-in radiating device of a battery pack for electric vehicles. The radiating surfaces of two sides of each single battery in the battery pack are connected with a multi-channel microgroove composite phase change radiating module. The multi-channel microgroove composite phase change radiating module is an I-shaped radiating module composed of a cavity connected with two fins at both sides thereof. The radiating surfaces at two sides of the single battery are connected with the cavity, respectively. Each two multi-channel microgroove composite phase change radiating modulesare alternatively arranged and contact with each other to form a column. A channel gap which facilitates flowing of air or insulative cooling liquid is provided between adjacent two columns. The single battery and the multi-channel microgroove composite phase change radiating module are installed in the battery packbox, both the upper surface and the lower surface of the battery packbox are provided with an air hole or an liquid inlet opening and an liquid outlet opening of the insulative cooling liquid.
At present, the battery pack in the market is generally cooled using the thermal management system of air cooling or water cooling. The air cooling system uses a fan to blow air onto a battery, so as to exchange heat between air and the battery. The water cooling system uses a water pump to transport the cooling liquid to a battery to exchange heat therewith, the heat is reserved in the cooling liquid temporarily, the heated cooling liquid continues to circulate, and participates circulation after being brought to the radiator to be cooled. Some battery packs use a solid-liquid phase change medium to prevent the battery pack from being in a high temperature, the periphery of the battery is filled with the solid-liquid phase change medium, when the battery is in a high temperature, the heat is transferred to the phase change medium, the solid-liquid phase change medium will absorb a large amount of heat when converting from solid state to liquid state. The thermal management system of air cooling often cannot meet the radiating requirement of the system due to its low efficiency of heat exchange; the water cooling system has a better capability of heat exchange, however, the structure is complex and the cost is high, which occupies large space of the whole vehicle, since temperature difference exists between the inlet-water and the outlet-water, the uniformity between the batteries is poor. The solid-liquid phase change medium generally has poor heat conducting performance, although the ability of heat reserving is provided, however, disadvantage of slow heat transfer also exists.
Therefore, a new thermal management system of a battery pack is a necessity to be provided to overcome the above-mentioned defects.
Object of the present application is to provide a heating management system of a battery pack applied to heat exchange.
The object of the present application is achieved by the following technical solutions:
The present application provides a heating management system of a battery pack, including a cooling plate, a condensation plate and a gas-liquid phase change medium, the cooling plate includes a top plate, a first lateral plate and a second lateral plate, the top plate and the first lateral plate and the second lateral plate together form an accommodating cavity for containing a battery module, the top plate is arranged at the top of the accommodating cavity, the first side plate and the second side plate are situated at two sides of the accommodating cavity, both the first lateral plate and the second lateral plate are of a hollow cavity structure, the gas-liquid phase change medium is contained inside the hollow cavity structure, the condensation plate is placed above the top plate and forms a cavity together with the top plate, the cavity is communicated with the hollow cavity structure.
Further, the system further includes a division plate, the division plate is arranged inside the hollow cavity structure of the first lateral plate and the second lateral plate, the division plate divides the hollow cavity structure into a plurality of cooling grooves, each cooling groove is communicated with the cavity.
Further, the system further includes a lower baffle, the lower baffle is arranged at the top plate, which divides the cavity into a plurality of liquid separating areas, each liquid separating area is communicated with the cooling groove, and a gap exists between the lower baffle and the condensation plate.
Further, the system further includes an upper baffle, the upper baffle is arranged on the condensation plate, and a gap exists between the upper plate and the top plate.
Further, the system further includes a balance hole, the balance hole is provided at the division plate, and the balance hole is connected through the cooling grooves at two sides of the division plate.
Further, all the balance holes are of equal height.
Further, the system further includes a separation plate, the separation plate is arranged inside the cavity, which separates the cavity into an independent first cavity and second cavity, the first cavity is communicated with all the cooling grooves of the first lateral plate, the second cavity is communicated with all the cooling grooves of the second lateral plate.
Further, the system further includes a cover of a filling opening and a filling opening, the filling opening is provided on the condensation plate, the cover of the filling opening is sleeved on the filling opening, and the filling opening is communicated with the liquid separating area.
Further, there are multiple filling holes, which are arranged corresponding to the first cavity and the second cavity, respectively.
Further, the condensation is fixedly connected with the top plate through welding.
Comparing to the prior art, the present application possesses the following beneficial effects: the heating management system of the battery pack of the present application achieves that the heat of the battery module is transferred to the condensation plate without the effect of the external force, the structure of the present application is simple and compact, which occupies small space, costs less, the heat exchanging effect is significant and is easy to implement, and can achieve uniform cooling the battery module and possesses good heat conductivity.
1. Cooling plate; 101. Top plate; 102. First lateral plate; 103. Second lateral plate; 2. Condensation plate; 3. Gas-liquid phase change medium; 4. Division plate; 5. Cooling groove; 6. Lower baffle; 7. Upper baffle; 8. Balance hole; 9. Separation plate; 10. Cover of filling opening; 11. Filling opening; 12. Battery module.
Hereinafter, specific implementing manners of a thermal management system of a battery pack according to the present application will be introduced referring to
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The above described are only part of the embodiments of the present application, but not all of them, any equivalent variations made by those skilled in the art to the technical solutions of the present application after reading the specification of the present application shall be covered by the claims of the present application.
Number | Date | Country | Kind |
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201610127135.3 | Mar 2016 | CN | national |