Energy storage device with liquid cooling plate heat dissipation system

Abstract

This invention discloses an energy storage device with a liquid cooling plate heat dissipation system, comprising a battery module, a housing, a water-cooled plate, a plurality of heat dissipation fins, and a non-conductive liquid. The battery module is housed within the housing, and the non-conductive liquid at least submerges the battery module within the housing. The water-cooled plate covers the housing and has internal temperature equalization channels for coolant flow. The plurality of heat dissipation fins are connected to the side of the water-cooled plate corresponding to the housing and extend into the housing to exchange heat with the non-conductive liquid. In this way, the heat generated by the battery module can be directly transferred to the water-cooled plate via the non-conductive liquid, and then transferred to the water-cooled plate via the heat dissipation fins. Finally, the heat is carried away by the coolant in the temperature equalization channels within the water-cooled plate, thereby reducing heat accumulation in the energy storage device and improving cooling efficiency.

Claims

1. An energy storage device with a liquid cooling plate heat dissipation system, comprising: A battery module comprising a plurality of battery cells; a housing forming an accommodating space for housing the battery module; a water-cooled plate covering the housing, the water-cooled plate having a heat exchange channel having an inlet end and an outlet end for allowing coolant to flow through the heat exchange channel of the water-cooled plate; a plurality of heat dissipation fins connected to the side of the water-cooled plate facing the accommodating space and extending into the accommodating space; and the accommodating space of the housing being filled with a non-conductive liquid, the non-conductive liquid at least submerging the battery module and contacting the water-cooled plate and the plurality of heat dissipation fins, so that the heat generated by the battery module is conducted through the non-conductive liquid to the water-cooled plate and the plurality of heat dissipation fins, and then carried away by the coolant in the heat exchange channel.

2. The energy storage device with a liquid cooling plate heat dissipation system as described in claim 1 further includes one or two insulating plates disposed between the battery module and the water cooling plate.

3. The energy storage device with a liquid cooling plate heat dissipation system as claimed in claim 1, wherein the side of the water cooling plate facing the accommodating space contacts the non-conductive liquid, so that the heat energy of the battery module is transferred directly to the water cooling plate via the non-conductive liquid and to the water cooling plate via the non-conductive liquid and the plurality of heat dissipation fins.

4. The energy storage device with a liquid cooling plate heat dissipation system as claimed in claim 1, wherein the heat exchange channel is one or a combination of a serpentine channel, a parallel channel, or a microchannel.

5. The energy storage device with a liquid cooling plate heat dissipation system as described in claim 4, wherein the temperature equalization channel is a variable cross-section channel, which includes at least one narrow channel and at least one wide channel, the narrow channel and the wide channel being configured according to the heat source distribution of the battery module.

6. The energy storage device with a liquid cooling plate heat dissipation system as claimed in claim 5, wherein the narrow flow channel corresponds to a high-heat zone of the battery module to increase the local flow rate of the coolant; and the wide flow channel corresponds to a low-heat zone of the battery module to reduce the local pressure loss of the coolant.

7. The energy storage device with a liquid cooling plate heat dissipation system as claimed in claim 1, wherein the heat exchange channel is formed by CNC machining, stamping or extrusion, and the water cooling plate is sealed by welding, vacuum lead soldering, vacuum hard soldering or laser welding.

8. The energy storage device with a liquid cooling plate heat dissipation system as claimed in claim 1, wherein the water cooling plate is a copper cooling plate, an aluminum cooling plate, an aluminum-graphite composite cooling plate or a ceramic composite cooling plate, and the surface of the water cooling plate is formed with an anodized layer, a fluorocarbon coating or a chemical nickel layer.

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