Cooling device of battery pack

Abstract

The utility model discloses a cooling device of a battery pack. The cooling device comprises a main body structure, the main body mechanism comprises a battery box for mounting a battery pack, and a battery cavity for placing the battery pack is formed in the battery box; the cooling mechanism is used for cooling the battery pack; the cooling mechanism comprises a cooling box and cooling boxes, three groups of cooling boxes are arranged in the battery box, the three groups of cooling boxes are respectively positioned at two ends and the middle of the battery box, cooling liquid is injected into the cooling box and is conveyed into the three groups of cooling boxes through a pump body, and channels for the cooling liquid to pass through are arranged in the cooling boxes. According to the battery pack cooling device, the cooling liquid can be recycled while the battery pack is cooled, rapid consumption of the cooling liquid is avoided, meanwhile, the battery pack can be cooled under the condition that the battery pack is not directly contacted in a circulating cooling mode through the cooling box and the pipeline, and the safety and reliability of cooling of the battery pack are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery pack cooling equipment technical field, concretely is a kind of battery pack cooling device. BACKGROUND

[0002] Battery pack, also known as battery PACK, is a key component for storing electrical energy in new energy vehicles. It is composed of multiple battery modules, each of which is composed of multiple battery cells through series and parallel connection. Battery pack not only provides necessary voltage and capacity to drive the vehicle, but also includes battery management system (BMS), thermal management system, electrical interface and housing, etc. to ensure the safe and stable operation of the battery and provide protection mechanism to prevent overcharge, overdischarge, overtemperature and other abnormal conditions. The design and performance of battery pack are crucial to the overall performance of new energy vehicles. It not only affects the vehicle's endurance, but also directly relates to the safety and economy of the vehicle. Energy density, thermal management efficiency and long-term durability of battery pack are the focus of manufacturers and consumers.

[0003] In order to improve safety, battery pack cooling device will be installed in electric vehicle, through retrieval, Chinese patent application number: CN202323007487.X a kind of battery pack cooling device, including water tank body;The top of the water tank is fixedly connected with gas tank;The side of the gas tank is fixedly connected with air pipe;The bottom end of the air pipe is fixedly connected with electric control valve;The electric control valve is fixedly connected on the side of the water tank;The side of the water tank body is provided with water supply assembly;By setting spray pipe, piston cylinder, piston rod, first spring, sealing seat, sealing ball, temperature sensing liquid and first spring, in use, rely on temperature sensing liquid to receive high temperature to push sealing ball and sealing seat to separate, while ensuring the overall cooling of battery pack, reduce the cooling liquid spray amount in low temperature area, increase the pipeline flow in high temperature area, improve the spray amount of cooling liquid, to improve the cooling effect of high temperature area, while reducing the cooling liquid consumption of water tank, prolong the cooling time.

[0004] The above technical solution cools the battery pack by spraying cooling liquid on it. On the one hand, the battery generates high temperature during operation. Simply relying on temperature sensor to detect high temperature and spray cooling liquid will result in rapid consumption of cooling liquid, which needs to be frequently replenished. On the other hand, spraying cooling liquid can cause corrosion and aging of battery pack circuit, even short circuit, which is not worth the loss. Therefore, we need to propose a battery pack cooling device. UTILITY MODEL CONTENTS

[0005] The utility model discloses a purpose lies in provide a kind of cooling device of battery pack, the device simple structure, convenient to use, through the setting of cooling mechanism can be cooled to battery pack while also being able to carry out the recycling of coolant, avoid the rapid consumption of coolant, reduce cooling cost, simultaneously, through the circulation heat dissipation mode of cooling box and pipeline can be cooled to battery pack without direct contact battery pack, improve the security and reliability of battery pack cooling, to solve the problem proposed in the above background art.

[0006] To achieve the above object, the utility model provides the following technical scheme:

[0007] A kind of cooling device of battery pack, comprising:

[0008] Main body structure;

[0009] The main body mechanism includes the battery box for installing battery pack, the inside of the battery box is provided with the battery cavity for placing battery pack;

[0010] It further includes cooling mechanism for cooling battery pack;

[0011] The cooling mechanism includes cooling tank and cooling box, the cooling box is provided with three groups in the inside of battery box, three cooling boxes are located at the both ends and middle of battery box respectively, cooling liquid is injected in the inside of cooling tank, and is sent to three cooling boxes by pump body, cooling box is provided with the passage for cooling liquid.

[0012] Preferably, the pump body is installed on the outer wall of the battery box, the inlet end of the pump body is fixedly connected with the inlet pipe, the inlet pipe is sealingly inserted into the cooling tank, and the end of the inlet pipe extends to the inner bottom of the cooling tank.

[0013] Preferably, the cooling box includes a first box body, a second box body and a third box body, the outlet end of the pump body is fixedly connected with the outlet pipe, and the outlet pipe is sealingly inserted into the outer wall of the battery box and communicated with the first box body.

[0014] Preferably, the other end of the first box body is communicated with one end of the second box body through a first connecting pipe, and both ends of the first connecting pipe are sealingly inserted into the battery box.

[0015] Preferably, the other end of the second box body is communicated with one end of the third box body through a second connecting pipe, and both ends of the second connecting pipe are sealingly inserted into the battery box.

[0016] Preferably, the other end of the third box body is communicated with the cooling tank through a reflux pipe, and both ends of the reflux pipe are sealingly inserted into the battery box and the cooling tank.

[0017] Preferably, the cooling box is further provided with a semiconductor refrigerator, and a heat absorbing sheet is fixedly connected to a heat absorbing end of the semiconductor refrigerator.

[0018] Compared with the prior art, the utility model has the advantages that:

[0019] The utility model discloses a main body structure including battery box, battery cavity is arranged in battery box, still set up including cooling box and cooling mechanism of cooling box, and the cooling liquid in cooling box is transported to cooling box through the pump body, and circulates through the pipeline, and the device structure is simple, convenient to use, can carry out the circulation utilization of cooling liquid while cooling battery pack through the setting of cooling mechanism, avoids the rapid consumption of cooling liquid, reduces the cooling cost, simultaneously, through the circulation heat dissipation mode of cooling box and pipeline can heat dissipation battery pack under the condition of not directly contacting battery pack, improves the security and reliability of battery pack cooling. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 It is the structural schematic diagram of the utility model;

[0021] Fig. 2 It is the structural schematic diagram of battery box of the utility model;

[0022] Fig. 3 It is the structural schematic diagram of cooling box of the utility model.

[0023] In the drawing: 1, battery box;2, cooling box;201, first box body;202, second box body;203, third box body;3, battery cavity;4, cooling box;5, pump body;6, liquid outlet pipe;7, liquid inlet pipe;8, first connecting pipe;9, second connecting pipe;10, backflow pipe;11, semiconductor refrigerator;12, heat absorbing sheet;13, passageway. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings of the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] Please refer to Figs. 1-3 The utility model provides a technical scheme:

[0026] A cooling device for battery pack, comprising:

[0027] The main body structure comprises a battery box 1 for mounting the battery pack, and a battery cavity 3 is arranged in the battery box 1 for placing the battery pack;

[0028] The cooling mechanism comprises a cooling box 4 and three cooling boxes 2 arranged in the battery box 1, and the cooling box 4 is filled with cooling liquid which is pumped into the three cooling boxes 2 by a pump body 5.

[0029] The pump body 5 is mounted on the outer wall of the battery box 1, and the inlet end of the pump body 5 is fixedly connected with an inlet pipe 7 which is sealingly inserted into the cooling box 4 and extends to the inner bottom of the cooling box 4. The cooling box 2 comprises a first box body 201, a second box body 202 and a third box body 203. The outlet end of the pump body 5 is fixedly connected with an outlet pipe 6 which is sealingly inserted into the outer wall of the battery box 1 and communicates with the first box body 201. The other end of the first box body 201 communicates with one end of the second box body 202 through a first connecting pipe 8 which is sealingly inserted into the battery box 1 at both ends. The other end of the second box body 202 communicates with one end of the third box body 203 through a second connecting pipe 9 which is sealingly inserted into the battery box 1 at both ends. The other end of the third box body 203 communicates with the cooling box 4 through a return pipe 10 which is sealingly inserted into the battery box 1 and the cooling box 4 at both ends.

[0030] The main body structure comprises a battery box 1 for mounting the battery pack, and a battery cavity 3 is arranged in the battery box 1 for placing the battery pack, and the cooling mechanism comprises a cooling box 4 and three cooling boxes 2 arranged in the battery box 1, and the cooling box 4 is filled with cooling liquid which is pumped into the three cooling boxes 2 by a pump body 5.

[0031] In general, the device is simple in structure and convenient to use, can cool the battery pack and recycle the coolant through the setting of the cooling mechanism, avoids rapid consumption of the coolant, reduces the cooling cost, and improves the safety and reliability of the battery pack cooling through the circulation cooling of the cooling box 2 and the pipeline without direct contact with the battery pack.

[0032] The cooling box 2 is made of copper, which is more conducive to heat exchange between the coolant and the battery pack.

[0033] Further, please refer to Figs. 1-3 :

[0034] The cooling box 4 is also provided with a semiconductor refrigerator 11, and the heat absorption end of the semiconductor refrigerator 11 is fixedly connected with a heat absorption sheet 12, the heat absorption sheet 12 is sealingly inserted into the cooling box 4, and the lower end of the heat absorption sheet 12 extends to the bottom of the cooling box 4.

[0035] The semiconductor refrigerator 11 can cool the coolant in the cooling box 4 through the heat absorption sheet 12 when working, so that the coolant can always keep low temperature, thereby guaranteeing the cooling capacity of the battery pack.

[0036] The heat absorption sheet 12 is made of copper sheet, which is more conducive to heat absorption of the coolant, and a plurality of groups of heat absorption sheets 12 are equidistantly distributed at the heat absorption end of the semiconductor refrigerator 11 to improve the cooling efficiency of the coolant.

[0037] The cooling liquid is provided with a filling port for filling the coolant, and the filling port is sealingly provided with a cover.

[0038] Although the embodiments of the utility model have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model, and those skilled in the art can change, modify, replace and modify the above embodiments within the scope of the utility model.

Claims

1. A cooling device of a battery pack, characterized by, The utility model relates to a battery cooling device, including: Main body structure; The main body structure includes the battery box (1) for installing the battery package, the inside of battery box (1) is provided with the battery cavity (3) for placing the battery package; Also include the cooling mechanism for the cooling of battery package; The cooling mechanism includes cooling box (4) and cooling box (2), and the cooling box (2) is provided with three groups in the inside of battery box (1), and three groups of cooling box (2) are located at both ends and the middle of battery box (1) respectively, and the inside of cooling box (4) is injected with cooling liquid, and is transported to three groups of cooling box (2) by pump body (5), and cooling box (2) is provided with the passage (13) for the cooling liquid.

2. The battery pack cooling device of claim 1, wherein: The pump body (5) is installed on the outer wall of battery box (1), and the liquid inlet end of pump body (5) is fixedly connected with liquid inlet pipe (7), liquid inlet pipe (7) is sealingly inserted in cooling box (4), and the end of liquid inlet pipe (7) extends to the inner bottom of cooling box (4).

3. The battery pack cooling device of claim 1, wherein: The cooling box (2) includes first box body (201), second box body (202) and third box body (203), and the liquid outlet end of pump body (5) is fixedly connected with liquid outlet pipe (6), and liquid outlet pipe (6) is sealingly inserted in the outer wall of battery box (1) and is communicated with first box body (201).

4. The battery pack cooling device of claim 3, wherein: The other end of first box body (201) is communicated with one end of second box body (202) through first connecting pipe (8), and both ends of first connecting pipe (8) are sealingly inserted in battery box (1).

5. The battery pack cooling device of claim 4, wherein: The other end of second box body (202) is communicated with one end of third box body (203) through second connecting pipe (9), and both ends of second connecting pipe (9) are sealingly inserted in battery box (1).

6. The battery pack cooling device of claim 5, wherein: The other end of third box body (203) is communicated with cooling box (4) through backflow pipe (10), and both ends of backflow pipe (10) are sealingly inserted in battery box (1) and cooling box (4) respectively.

7. The battery pack cooling device of claim 1, wherein: The cooling box (4) is further provided with a semiconductor refrigerator (11), and the heat absorption end of the semiconductor refrigerator (11) is fixedly connected with a heat absorption sheet (12), the heat absorption sheet (12) is sealingly inserted in the cooling box (4), and the lower end of the heat absorption sheet (12) extends to the inner bottom of the cooling box (4).

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