Lithium battery liquid cooling energy storage box with partition plate flow channel

Abstract

The utility model provides a lithium battery liquid cooling energy storage box with a partition plate runner, which comprises a top plate, a side plate and a bottom plate, a lithium battery pack is placed in the energy storage box, the bottom plate and the partition plate are integrally cast and formed, the bottom plate is made of a water cooling plate, and the runner is arranged in the partition plate and communicated with the runner in the bottom plate. The lithium battery units are respectively arranged in spaces among the partition plates, and the whole lithium battery pack is immersed in the immersed cooling liquid filled in the energy storage box; the bottom plate is provided with a secondary refrigerant liquid inlet and a secondary refrigerant liquid outlet, a secondary refrigerant sequentially flows through the secondary refrigerant liquid inlet, the bottom plate, the partition plate, the bottom plate 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 liquid 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 added, 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 with a partition flow channel. Background Art

[0002] 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.

[0003] Conventional liquid cooling mainly uses the ethylene glycol aqueous solution circulating inside the water-cooling plate as the coolant for heat exchange. The battery cells are only in contact with the bottom water-cooling plate, with a small heat exchange surface, low heat exchange efficiency and poor temperature consistency. Summary of the invention

[0004] The utility model aims to provide a lithium battery liquid cooling energy storage box with a partition flow channel, which has a reasonable structural design, integrates conventional liquid cooling and immersion liquid cooling, improves the cooling effect, and prolongs the battery life.

[0005] In order to achieve the above object, the utility model is implemented through the following technical solutions:

[0006] A lithium battery liquid-cooled energy storage box 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 and the partition are cast as one piece, the bottom plate is made of a water-cooled plate, the flow channel is arranged in the partition and is connected with the flow channel in the bottom plate, the lithium battery pack is respectively arranged in the empty space between the partitions, and the entire 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 bottom plate, and the coolant flows through the coolant inlet, the bottom plate, the partition, the bottom 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.

[0007] Furthermore, the immersion cooling liquid is a fluorinated liquid.

[0008] Furthermore, the coolant is ethylene glycol solution or other antifreeze liquid.

[0009] Furthermore, the liquid cooling circulation device is a circulation pump or a stirrer.

[0010] Furthermore, the coolant flows in blocks from front to back on the bottom plate, which can ensure that the bottom plate and the partitions on the bottom plate are fully flowed through.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] The utility model discloses a lithium battery liquid-cooled energy storage box with a partition flow channel, which has a reasonable structural design, integrates conventional liquid cooling and immersion liquid cooling, adds a partition flow channel, improves the cooling effect, and extends the battery life. Specifically, the utility model is a box structure in which the bottom plate and the partition on the bottom plate are both water-cooled plates and welded together. The lithium battery pack in the box is immersed in the immersion coolant, and 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 water-cooled plates of the bottom plate and the partition, thereby achieving the effect of efficient heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the longitudinal section structure of a lithium battery liquid-cooled energy storage box with a baffle flow channel of the utility model.

[0014] Figure 2 It is a schematic diagram of the structure in which the partition and the bottom plate of the utility model are integrated into one.

[0015] Figure 3 It is a schematic diagram of the bottom plate flow channel structure of the utility model.

[0016] Figure numerals: 1. side panel; 2. bottom panel; 3. partition; 4. lithium battery pack; 5. immersion coolant; 6. liquid cooling circulation device; 7. coolant inlet; 8. coolant outlet; 9. partition bar; 10. long flow channel. DETAILED DESCRIPTION

[0017] The embodiments of the present utility model are described in further detail below in conjunction with the accompanying drawings.

[0018] like Figure 1 , 2 As shown, a lithium battery liquid-cooled energy storage box 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 is placed in the energy storage box, the bottom plate 2 is provided with a space separated by a partition 3, the bottom plate 2 and the partition 3 are integrally cast, the bottom plate 2 is made of a water-cooled plate, the partition 3 is arranged with a flow channel and is connected to the long flow channel 10 in the bottom plate 2, the lithium battery pack 4 is respectively arranged in the space between the partitions 3, and the entire lithium battery pack is immersed in the immersion coolant 5 filled in the energy storage box. Placing each lithium battery pack 4 (battery cell) in the space between the partitions 3 can not only fix the position of the battery cell to prevent sliding, but also increase the heat exchange area of ​​the water-cooled plate. At the same time, the setting of the partition 3 occupies a part of the volume, which can reduce the amount of immersion coolant 5. The energy storage box is filled with an immersion coolant 5 to completely immerse all the battery cells (lithium battery packs). Heat is exchanged between the battery cells and the immersion coolant 5, and the immersion coolant 5 exchanges heat with the water cooling plate (bottom plate 2) and the partition 3, thereby greatly improving the heat dissipation capacity of the energy storage box.

[0019] The energy storage box is provided with a liquid cooling circulation device 6. The liquid cooling circulation device 6 is a circulation pump or a stirrer, which can maintain the immersion cooling liquid 5 in the energy storage box in a flowing state, thereby further enhancing the heat exchange capacity and improving the working efficiency of the battery cell constant temperature.

[0020] Preferably, the immersion cooling liquid 5 is a fluorinated liquid. The coolant is an ethylene glycol solution or other antifreeze liquid.

[0021] like Figure 3 As shown, the bottom plate 2 is provided with a coolant inlet 7 and a coolant outlet 8, respectively. The coolant flows through the coolant inlet 7, the bottom plate 2, the partition 3, the bottom plate 2, and the coolant outlet 8 in sequence to complete a heat dissipation cycle. Specifically, the refrigerant flows in blocks from front to back on the bottom plate 2, which can ensure that the bottom plate 2 and the partition 3 on the bottom plate 2 are fully flowed through; the bottom plate 2 is divided into a plurality of flow blocks from front to back, preferably three flow blocks, and each flow block is provided with a plurality of long flow channels 10 in parallel, preferably 8-10 long flow channels 10; the refrigerant inlet 7 is arranged on the front side of the bottom plate 2, and the refrigerant outlet 8 is arranged on the rear side of the bottom plate 2. The refrigerant flows from the refrigerant inlet 7 into the bottom plate 2 (water-cooled plate) and enters the first flow block (front flow block) and flows evenly through each long flow channel 10 of the first flow block, and at the same time flows through the partition flow channel on the upper side of the first flow block, and then the refrigerant flows to the second flow block in the same way, and then flows to the third flow block until it flows out from the refrigerant outlet 8.

[0022] Furthermore, the bottom plate 2 is provided with partition bars 9 for separating the various flow blocks, and the partition bars 9 are provided at the coolant inflow end of each flow block to separate adjacent flow blocks.

[0023] 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-cooled energy storage box 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 and the partition are integrally cast, the bottom plate is made of a water-cooled plate, a flow channel is arranged in the partition and is connected with the flow channel in the bottom plate, the lithium battery packs are respectively arranged in the empty spaces between the partitions, and the entire 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 bottom plate, and the coolant flows through the coolant inlet, the bottom plate, the partition, the bottom 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.

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

3. A lithium battery liquid-cooled energy storage box with a baffle flow channel according to claim 1 or 2, characterized in that: The cooling medium is ethylene glycol solution.

4. A lithium battery liquid-cooled energy storage box with a baffle flow channel according to claim 1, characterized in that: The liquid cooling circulation device is a circulation pump or a stirrer.

5. A lithium battery liquid-cooled energy storage box with a baffle flow channel according to claim 1, characterized in that: The coolant flows in blocks from front to back on the bottom plate, which can ensure that the bottom plate and the partitions on the bottom plate are fully flowed through.

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