Lithium battery liquid cooling energy storage box integrally formed by water cooling plate and provided with partition plate flow channel

Abstract

The utility model provides a lithium battery liquid cooling energy storage box integrally formed with a water cooling plate and a partition plate runner, the energy storage box is composed of a top plate, a side plate and a bottom plate, a lithium battery pack is placed in the energy storage box, the bottom plate, the partition plate and the side plate are welded into an integral structure, the bottom plate is made of the water cooling plate, the runner is arranged in the bottom plate, and the partition plate is arranged in the runner. The partition plates and the side plates are of hollow structures and are communicated with the flow channel in the bottom plate, the lithium battery pack is partitioned by the partition plates in rows and immersed in immersed cooling liquid filled in the energy storage box, and a secondary refrigerant inlet and a secondary refrigerant outlet are formed in the side plates of the energy storage box respectively. A secondary refrigerant sequentially flows through the secondary refrigerant liquid inlet, the side plates, the bottom plate, the partition plate, the side plates and the secondary refrigerant liquid outlet to complete one-time heat dissipation circulation, and a liquid cooling circulation device is arranged in the energy storage box. The cooling device has the advantages that the structural design is reasonable, two cooling modes of conventional liquid cooling and immersed liquid cooling are integrated, the partition plate flow channels are additionally arranged, the cooling effect is improved, and the service life of the battery is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery energy storage, and in particular to a lithium battery liquid-cooled energy storage box formed integrally with a water-cooling plate having a baffle flow channel. Background Art

[0002] With the large-scale promotion and application of renewable energy such as solar energy and wind energy, energy storage technology has also ushered in a great development. Among them, lithium batteries have gradually become the mainstream product of energy storage due to their high energy density, long service life, high rated voltage, low self-discharge rate, light weight, green environmental protection and almost no water consumption in production.

[0003] At present, there are two main cooling methods for lithium batteries: air cooling and liquid cooling. Among them, the air cooling method has a simple structure and relatively low cost, but the cooling effect is not good; the liquid cooling method has a relatively good temperature control effect, but when the battery cell capacity is large, the number is large, and the battery charge and discharge rate is high, the battery generates too much heat, and the conventional liquid cooling method is difficult to effectively remove the heat in time, resulting in an increase in battery temperature and affecting the battery life.

[0004] Conventional liquid cooling heat dissipation structures are mostly composed of a box and a water-cooling plate. The battery cells are placed on the water-cooling plate, and ethylene glycol aqueous solution flows inside the water-cooling plate as a coolant. In terms of heat exchange, this structure only relies on the bottom water-cooling plate to contact the battery cells for heat exchange, which has a small heat exchange surface, low heat exchange efficiency, and poor temperature consistency. Utility Model Content

[0005] The purpose of the utility model is to provide a lithium battery liquid cooling energy storage box with a water-cooling plate integrally formed with a partition flow channel, which has a reasonable structural design, integrates conventional liquid cooling and immersion liquid cooling, improves the cooling effect, and extends the battery life.

[0006] In order to achieve the above object, the utility model is implemented through the following technical solutions:

[0007] A lithium battery liquid-cooled energy storage box with a water-cooled plate integrally formed with a partition flow channel, the energy storage box consists of a top plate, a side plate and a bottom plate, a lithium battery pack is placed in the energy storage box, the bottom plate, the partition plate and the side plate are welded into an integral structure, the bottom plate is made of a water-cooled plate, the flow channel is arranged in the bottom plate, the partition plate and the side plate are hollow structures and are connected to the flow channel in the bottom plate, the lithium battery pack is separated into columns by the partition, the lithium battery pack is immersed in the immersion coolant filled in the energy storage box, the side plates of the energy storage box are respectively provided with a coolant inlet and a coolant outlet, the coolant flows through the coolant inlet, the side plate, the bottom plate and the partition plate, the side plate, and the coolant outlet in sequence to complete a heat dissipation cycle, and a liquid cooling circulation device is provided in the energy storage box.

[0008] Furthermore, the distance between the lithium battery pack and one of the side panels of the energy storage box is 30 mm, which is used to place the temperature detection element; the distance between the lithium battery pack and the other three side panels of the energy storage box is 15 mm, so that the immersion coolant is in full contact with the lithium battery pack and the water cooling plate respectively.

[0009] Furthermore, the spacing between two adjacent columns of the lithium battery pack is 10 mm, and the thickness of the partition is 8 mm.

[0010] Furthermore, the immersion cooling liquid is a fluorinated liquid.

[0011] Furthermore, the coolant is ethylene glycol solution or other antifreeze liquid.

[0012] Furthermore, the liquid cooling circulation device is a circulation pump or a small fan or a stirring device.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] The utility model discloses a lithium battery liquid-cooled energy storage box with a water-cooled plate integrally formed with a baffle flow channel. The structure is reasonably designed, and it integrates two cooling forms, conventional liquid cooling and immersion liquid cooling. The baffle flow channel is added to improve the cooling effect and extend the battery life. Specifically, the lithium battery energy storage box of the utility model is composed of a top plate, a side plate and a bottom plate. The bottom plate is made of a water-cooled plate, and the flow channel is arranged in the bottom plate. The interior of the baffle and the side plate is a hollow structure and is connected to the flow channel in the bottom plate. The lithium battery pack in the box is immersed in the immersion coolant, and the baffle is separated by rows. The heat generated by the lithium battery pack is taken away by the circulation of the immersion coolant and further released to the outside through the side plate, the baffle and the bottom plate, thereby playing a role of efficient heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Figure 2 It is a structural schematic diagram of the one-piece water-cooling plate of the utility model.

[0017] Figure 3 It is a schematic diagram of the flow structure of the bottom plate, the partition plate and the side plate of the utility model.

[0018] Figure numerals: 1, side panel; 2, bottom panel; 3, lithium battery pack; 4, partition; 5, coolant inlet; 6, coolant outlet; 7, liquid cooling circulation device. DETAILED DESCRIPTION

[0019] The embodiments of the present utility model are described in further detail below in conjunction with the accompanying drawings.

[0020] like Figure 1 ,2 As shown in Figure 3, a lithium battery liquid-cooled energy storage box with a water-cooled plate integrally formed with a partition flow channel, the energy storage box is composed of a top plate, a side plate 1 and a bottom plate 2, a lithium battery pack 3 is placed in the energy storage box, the bottom plate 2, the partition 4 and the side plate 1 are welded into an integral structure, the bottom plate 2 is made of a water-cooled plate, a flow channel is arranged in the bottom plate 2, the partition 4 and the side plate 1 are hollow structures and are connected with the flow channel in the bottom plate 2, the lithium battery pack 3 is separated by columns by the partition 4, the bottom surface of the lithium battery pack 3 is adhered to the bottom plate 2 (water-cooled plate) by using thermal conductive adhesive, the lithium battery pack 3 is immersed in the immersion coolant filled in the energy storage box, the side plate 1 of the energy storage box is respectively provided with a coolant inlet 5 and a coolant outlet 6, the coolant flows through the coolant inlet 5, the side plate 1, the bottom plate 2 and the partition 4, the side plate 1, and the coolant outlet 6 in sequence to complete a heat dissipation cycle, and a liquid cooling circulation device 7 is provided in the energy storage box.

[0021] Preferably, the distance between the lithium battery pack 3 and one of the side panels 1 of the energy storage box is 30 mm, which is used to place the temperature detection element; the distance between the lithium battery pack 3 and the other three side panels 1 of the energy storage box is 15 mm, so that the immersion coolant is in full contact with the lithium battery pack 3 and the water cooling plate. The distance between two adjacent rows of the lithium battery pack 3 is 10 mm, and the thickness of the partition 4 is 8 mm, which can further fix the position of the lithium battery pack 3 and enhance the heat exchange of the lithium battery pack 3.

[0022] The immersion cooling liquid is fluorinated liquid. The coolant is ethylene glycol solution or other antifreeze liquid. The liquid cooling circulation device 7 is a circulation pump or a small fan or a stirring device.

[0023] Specifically, an immersion coolant is injected into the energy storage box to maintain a large contact area between the immersion coolant and the lithium battery pack 3, and between the immersion coolant and the water cooling plate, thereby improving the heat exchange capacity. A circulation pump is placed in the energy storage box to maintain the immersion coolant in the energy storage box in a flowing state, further enhancing the heat exchange capacity and improving the temperature consistency of the lithium battery pack 3. In order to further reduce the pressure generated by the circulation pump when working in the energy storage box, the circulation pump can be replaced with a small fan or other stirring device.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the concept of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A lithium battery liquid cooling energy storage box with a water-cooling plate integrally formed with a baffle flow channel, the energy storage box is composed of a top plate, a side plate and a bottom plate, and a lithium battery pack is placed in the energy storage box, characterized in that: The bottom plate, partition plate and side plate are welded into an integrated structure. The bottom plate is made of a water-cooled plate. A flow channel is arranged in the bottom plate. The interior of the partition plate and the side plate is a hollow structure and is connected to the flow channel in the bottom plate. The lithium battery pack is separated into columns by partitions. The lithium battery pack is immersed in the immersion coolant filled in the energy storage box. A coolant inlet and a coolant outlet are respectively provided on the side plates of the energy storage box. The coolant flows through the coolant inlet, the side plate, the bottom plate and the partition plate, the side plate and the coolant outlet in sequence to complete a heat dissipation cycle. A liquid cooling circulation device is provided in the energy storage box.

2. A lithium battery liquid-cooled energy storage box with a water-cooled plate integrally formed with a baffle flow channel according to claim 1, characterized in that: The distance between the lithium battery pack and one of the side panels of the energy storage box is 30 mm, which is used to place the temperature detection element; the distance between the lithium battery pack and the other three side panels of the energy storage box is 15 mm, so that the immersion coolant is in full contact with the lithium battery pack and the water cooling plate respectively.

3. A lithium battery liquid-cooled energy storage box with a water-cooled plate integrally formed with a baffle flow channel according to claim 2, characterized in that: The spacing between two adjacent rows of the lithium battery pack is 10 mm, and the thickness of the partition is 8 mm.

4. A lithium battery liquid-cooled energy storage box with a water-cooled plate integrally formed with a baffle flow channel according to claim 1, characterized in that: The immersion cooling liquid is fluorinated liquid.

5. The lithium battery liquid-cooled energy storage box with a water-cooled plate integrally formed with a baffle flow channel according to claim 1, characterized in that: The cooling medium is ethylene glycol solution.

6. The lithium battery liquid-cooled energy storage box with a water-cooled plate integrally formed with a baffle flow channel according to claim 1, characterized in that: The liquid cooling circulation device is a circulation pump or a small fan or a stirring device.

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