Battery thermal management device

Abstract

The present application discloses a battery thermal management device, including a battery box, a cooling fan, a battery, and a thermal conduction box. A cooling fan is provided at the front of the battery box. A plurality of batteries are provided in the battery box and are arranged at the same intervals in the horizontal direction. The thermal conduction box is a hollow structure for the circulation of coolant. There are multiple thermal conduction boxes, and the batteries are arranged one by one between two adjacent thermal conduction boxes. A plurality of ventilation slots are provided on the side of the thermal conduction box facing the battery. The plurality of ventilation slots are arranged in the vertical direction, and each ventilation slot is arranged along the wind direction. A circulating water mechanism for cooling is connected to the thermal conduction box. The battery of the present application is arranged between two adjacent thermal conduction boxes, and coolant flows in the thermal conduction box to reduce the temperature of the battery through temperature conduction. At the same time, ventilation slots are also provided on the thermal conduction box, and the heat of the battery can also be dissipated by air flow, thereby maintaining the balance of electric heat and heat dissipation.

Description

Technical Field

[0001] The present application relates to the technical field of battery heat dissipation, and in particular to a battery thermal management device. Background Art

[0002] Electric vehicles all use power batteries as their power. Electric vehicles use controllers, motors and other components to convert electrical energy into mechanical energy to drive the operation of the electric vehicle.

[0003] The power batteries of existing electric vehicles are generally composed of square lithium batteries or cylindrical lithium batteries connected in series or parallel to form high-power, large-capacity lithium battery packs. According to the heat generation mechanism of the battery, the battery pack will generate a lot of heat during the high-current charging and discharging process. The battery thermal management system is to maintain the heat generation and heat dissipation balance of the thermal environment inside the battery pack. When the heat inside the power battery is unevenly distributed and the life of the single cells is different, the power battery capacity and life will be attenuated, and even the temperature inside the power battery will rise sharply, leading to thermal runaway. Summary of the invention

[0004] The purpose of the present application is to provide a battery thermal management device in order to solve the above-mentioned problem. Cooling measures are set between each battery so that adjacent batteries can be cooled, thereby ensuring battery density and achieving heat dissipation balance.

[0005] This application achieves the above objectives through the following technical solutions:

[0006] A battery thermal management device comprises a battery box, a cooling fan, a battery, and a thermal conduction box. A cooling fan is arranged at the front of the battery box. A plurality of batteries are arranged in the battery box and are arranged at equal intervals in the horizontal direction. The thermal conduction box is a hollow structure for the circulation of coolant. There are multiple thermal conduction boxes, and the batteries are arranged one by one between two adjacent thermal conduction boxes. A plurality of ventilation slots are arranged on a side of the thermal conduction box facing the battery. The plurality of ventilation slots are arranged in the vertical direction, and each ventilation slot is arranged along the wind direction. A circulating water mechanism for cooling is connected to the thermal conduction box.

[0007] Furthermore, the circulating water mechanism includes an inlet pipe, an outlet pipe, an outlet collecting pipe, an inlet diverter pipe, an inlet connecting pipe and an outlet connecting pipe. The inlet pipe is connected to both ends of the inlet diverter pipe. The inlet diverter pipe is connected with a plurality of inlet connecting pipes. The plurality of inlet connecting pipes are connected to the front of the temperature conduction box one by one through an end facing away from the inlet diverter pipe. One end of the outlet pipe is connected to the outlet collecting pipe. The outlet collecting pipe is connected with a plurality of outlet connecting pipes. The plurality of outlet connecting pipes are connected to the rear of the temperature conduction box one by one through an end facing away from the outlet collecting pipe.

[0008] Furthermore, one end of the liquid inlet pipe facing away from the liquid inlet shunt pipe and one end of the liquid outlet pipe facing away from the liquid outlet collecting pipe both extend out of the battery box.

[0009] Furthermore, the outer wall of the battery box is provided with a low voltage connector and a high voltage connector.

[0010] Furthermore, a box cover is detachably provided on the top of the battery box.

[0011] Furthermore, fastening components are provided at the four bottom corners of the battery box.

[0012] Furthermore, the portion of the thermal conductive box contacting the battery is made of copper or aluminum.

[0013] Compared with the prior art, the battery of the present application is arranged between two adjacent thermal conduction boxes, and coolant flows in the thermal conduction boxes to reduce the temperature of the battery by temperature conduction. At the same time, ventilation grooves are also provided on the thermal conduction boxes, and the heat of the battery can also be dissipated by air flow, thereby maintaining the balance of electric heat and heat dissipation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present application but do not constitute a limitation to the present application. In the accompanying drawings:

[0015] Figure 1 It is a schematic diagram of the structure of this application;

[0016] Figure 2 It is a schematic diagram of the internal structure of the battery box of the present application;

[0017] Figure 3 It is a schematic diagram of the battery structure of the present application;

[0018] Figure 4 It is a schematic diagram of the liquid outlet manifold structure of the present application;

[0019] Figure 5 It is a schematic diagram of the structure of the temperature conduction box of the present application.

[0020] The following are the descriptions of the reference numerals:

[0021] 1. Battery box; 2. Box cover; 3. Cooling fan; 4. Fastening assembly; 5. Battery; 6. Temperature conduction box; 7. Ventilation slot; 8. Liquid inlet pipe; 9. Liquid outlet pipe; 10. Liquid outlet collecting pipe; 11. Liquid inlet shunt pipe; 12. Liquid inlet connecting pipe; 13. Liquid outlet connecting pipe; 14. Low voltage connector; 15. High voltage connector. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0023] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the attached Figure 1 , and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0024] like Figure 1-5 As shown, a battery thermal management device includes a battery box 1, a cooling fan 3, a battery 5, and a thermal conduction box 6. The cooling fan 3 is arranged at the front of the battery box 1. A plurality of batteries 5 are arranged in the battery box 1 and are arranged at the same intervals in the horizontal direction. The thermal conduction box 6 is a hollow structure for the circulation of coolant. There are multiple thermal conduction boxes 6, and the batteries 5 are arranged one by one between two adjacent thermal conduction boxes 6. A plurality of ventilation slots 7 are arranged on a side of the thermal conduction box 6 facing the battery 5. The plurality of ventilation slots 7 are arranged in the vertical direction, and each ventilation slot 7 is arranged along the wind direction. A circulating water mechanism for cooling is connected to the thermal conduction box 6.

[0025] Specifically, multiple batteries 5 can store more electricity, and their uniform arrangement can reduce the space occupied. When the battery 5 is between two adjacent thermal conduction boxes 6, the two thermal conduction boxes 6 can cool down the two sides of the battery 5 at the same time to ensure the cooling effect, and when the cooling fan 3 starts to dissipate heat, air circulates through the ventilation slots 7 to take away the heat emitted by the battery 5, and the heat dissipation balance of the battery 5 is maintained through the cooling and heat dissipation combination.

[0026] Furthermore, the circulating water mechanism includes a liquid inlet pipe 8, a liquid outlet pipe 9, a liquid outlet collecting pipe 10, a liquid inlet diverter pipe 11, a liquid inlet connecting pipe 12 and a liquid outlet connecting pipe 13. The liquid inlet pipe 8 is connected to both ends of the liquid inlet diverter pipe 11. The liquid inlet diverter pipe 11 is connected with a plurality of liquid inlet connecting pipes 12. The plurality of liquid inlet connecting pipes 12 are connected to the front of the thermal conduction box 6 one by one through an end facing away from the liquid inlet diverter pipe 11. One end of the liquid outlet pipe 9 is connected to the liquid outlet collecting pipe 10. The liquid outlet collecting pipe 10 is connected with a plurality of liquid outlet connecting pipes 13. The plurality of liquid outlet connecting pipes 13 are connected to the rear of the thermal conduction box 6 one by one through an end facing away from the liquid outlet collecting pipe 10.

[0027] Specifically, the coolant is pumped into the liquid inlet pipe 8 and the liquid inlet shunt pipe 11 at the same time, and then flows into the liquid inlet connecting pipe 12, and enters each thermal conductive box 6 from the liquid inlet connecting pipe 12. The two sides of the thermal conductive box 6 are attached to the battery 5, thereby cooling the battery 5 at a low temperature, further reducing the heat generation of the battery 5, and then the coolant is discharged from the rear of the thermal conductive box 6 to the liquid outlet connecting pipe 13, and then enters the liquid outlet collecting pipe 10 from the liquid outlet connecting pipe 13 for collection, and then flows from the liquid outlet collecting pipe 10 to the liquid outlet pipe 9 for discharge. By driving the circulating flow by the liquid pump, the thermal conductive box 6 can be kept at a low temperature and the temperature of the battery 5 can be reduced.

[0028] Furthermore, one end of the liquid inlet pipe 8 facing away from the liquid inlet shunt pipe 11 and one end of the liquid outlet pipe 9 facing away from the liquid outlet collecting pipe 10 both extend out of the battery box 1 .

[0029] Specifically, the liquid inlet pipe 8 and the liquid outlet pipe 9 connected to the cooler extend out of the battery box 1 to prevent the heat of the cooler from accumulating in the battery box 1 .

[0030] Furthermore, the outer wall of the battery box 1 is provided with a low voltage connector 14 and a high voltage connector 15 for circuit connection.

[0031] Furthermore, a box cover 2 is detachably provided on the top of the battery box 1 to facilitate opening the battery box 1 .

[0032] Furthermore, fastening components 4 are provided at the four bottom corners of the battery box 1 for fixing the battery box 1 .

[0033] Furthermore, the portion of the thermal conductive box 6 contacting the battery 5 is made of copper or aluminum to ensure thermal conductivity.

[0034] In the above structure, the battery generates heat during the discharge process, and the cooling fan 3 is started to extract the air in the battery box 1 and send it out. The external air enters the battery box 1 through the ventilation holes at the rear of the battery box 1, thereby taking away the heat, and the air flows inside the ventilation slots 7, directly taking away the heat emitted by the battery 5, thereby improving the heat dissipation efficiency. At the same time, the coolant enters the liquid inlet shunt pipe 11 through the liquid inlet pipe 8, and then flows into the liquid inlet connecting pipe 12, and enters each thermal conductive box 6 from the liquid inlet connecting pipe 12. The two sides of the thermal conductive box 6 are attached to the battery 5, thereby cooling the battery 5 at a low temperature, further reducing the heat generation of the battery 5, and then the coolant is discharged from the rear of the thermal conductive box 6 to the liquid outlet connecting pipe 13, and then enters the liquid outlet collecting pipe 10 from the liquid outlet connecting pipe 13 for collection, and then flows from the liquid outlet collecting pipe 10 to the liquid outlet pipe 9 for discharge. The circulation driven by the liquid pump can keep the thermal conductive box 6 at a low temperature and reduce the temperature of the battery 5.

[0035] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present application. Without departing from the spirit and scope of the present application, the present application may have various changes and improvements, which fall within the scope of the present application to be protected. The scope of protection claimed in the present application is defined by the attached claims and their equivalents.

Claims

1. A battery thermal management device, characterized in that: The invention comprises a battery box (1), a cooling fan (3), a battery (5), and a thermal conduction box (6). The front part of the battery box (1) is provided with a cooling fan (3). A plurality of batteries (5) are arranged in the battery box (1) at equal intervals in a horizontal direction. The thermal conduction box (6) is a hollow structure for circulation of a cooling liquid. There are a plurality of thermal conduction boxes (6), and the batteries (5) are arranged one by one between two adjacent thermal conduction boxes (6). A plurality of ventilation slots (7) are arranged on a side of the thermal conduction box (6) facing the battery (5). The plurality of ventilation slots (7) are arranged in a vertical direction, and each ventilation slot (7) is arranged along the wind direction. A circulating water mechanism for cooling is connected to the thermal conduction box (6).

2. A battery thermal management device according to claim 1, characterized in that: The circulating water mechanism comprises a liquid inlet pipe (8), a liquid outlet pipe (9), a liquid outlet collecting pipe (10), a liquid inlet shunt pipe (11), a liquid inlet connecting pipe (12) and a liquid outlet connecting pipe (13); the liquid inlet pipe (8) is connected to the liquid inlet shunt pipe (11) at both ends; the liquid inlet shunt pipe (11) is connected to a plurality of liquid inlet connecting pipes (12); the plurality of liquid inlet connecting pipes (12) are connected to the front of the temperature conducting box (6) one by one through an end facing away from the liquid inlet shunt pipe (11); one end of the liquid outlet pipe (9) is connected to the liquid outlet collecting pipe (10); the liquid outlet collecting pipe (10) is connected to a plurality of liquid outlet connecting pipes (13); the plurality of liquid outlet connecting pipes (13) are connected to the rear of the temperature conducting box (6) one by one through an end facing away from the liquid outlet collecting pipe (10).

3. A battery thermal management device according to claim 2, characterized in that: An end of the liquid inlet pipe (8) facing away from the liquid inlet branch pipe (11) and an end of the liquid outlet pipe (9) facing away from the liquid outlet collecting pipe (10) both extend out of the battery box (1).

4. A battery thermal management device according to claim 1, characterized in that: The outer wall of the battery box (1) is provided with a low-voltage connector (14) and a high-voltage connector (15).

5. A battery thermal management device according to claim 1, characterized in that: The top of the battery box (1) is detachably provided with a box cover (2).

6. A battery thermal management device according to claim 1, characterized in that: Fastening components (4) are provided at the four bottom corners of the battery box (1).

7. A battery thermal management device according to claim 1 or 2, characterized in that: The portion of the thermal conductive box (6) contacting the battery (5) is made of copper or aluminum.

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