Battery immersion type liquid cooling system controlled by proportional switch

Abstract

The invention relates to a battery immersion type liquid cooling heat dissipation system, which comprises an energy storage battery PACK box body, a shunting frame welded on the box body, a proportional switch arranged in the shunting frame, a rubber sealing base and a plurality of battery modules, a liquid inlet and a liquid outlet are formed in an energy storage battery PACK box body, the liquid inlet, the flow dividing frame, a battery module bottom gap, a battery module rear gap, a battery module side surface gap, a battery module front cavity and the liquid outlet jointly form a PACK internal cooling liquid flow channel, and liquid cooling heat dissipation in the energy storage battery PACK is jointly achieved with an external cooling liquid circulation system. According to the battery immersion type liquid cooling system disclosed by the invention, the proportional switches are arranged on the branch flow channels in the shunting frame, the opening and closing states of the proportional switches are controlled through the signals collected by the sensors on the battery modules, and the flow of cooling liquid in the different flow channels is adjusted, so that the control efficiency of the liquid cooling system is improved; and stable operation of the energy storage system is ensured.

Description

Technical Field

[0001] The present invention relates to the field of battery thermal management, and in particular to a battery immersion liquid cooling system controlled by a proportional switch. Background Art

[0002] With the rapid development of the new energy industry in recent years, photovoltaic, wind and hydropower have gradually been used in more and more industries and fields. However, the instability of the production of these clean energy sources and the fact that electricity cannot be stored have led to an increasingly strong demand for energy storage equipment. Containerized energy storage equipment is also favored by many users due to its integration and portability, and market demand continues to expand.

[0003] Container energy storage equipment is highly integrated, with small gaps between battery packs and poor natural heat dissipation capacity. Efficient heat dissipation modules are required to dissipate heat to ensure that the battery pack works at a suitable temperature. If the operating temperature is too high, the battery pack may increase voltage, self-ignite, or even explode, causing serious safety accidents, endangering the safety of users' lives and property, damaging corporate reputation, and damaging public interests.

[0004] At present, most battery immersion liquid cooling systems ensure uniform flow of coolant through flow channel structure design or indirect control methods. However, this pre-designed method cannot fully cope with the changing actual working environment. During actual operation, the specific operating conditions of different battery packs and the on-site working environment will further affect the operation of the liquid cooling system. Therefore, it is necessary to design a liquid cooling system that directly interferes with the coolant flow in the flow channel to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to directly interfere with the flow of coolant in different flow channels by means of a proportional switch 8 installed on the diversion frame 4, thereby ensuring that the flow of coolant in different flow channels can be adjusted according to the specific operating status of the battery, thereby improving the operating efficiency of the cooling system.

[0006] The above-mentioned purpose of the present invention is achieved by the following technical means:

[0007] The present invention relates to a battery immersion liquid cooling system controlled by a proportional switch, comprising:

[0008] The energy storage battery PACK box body 1 comprises a top cover and a lower box body, and the lower box body is provided with a liquid inlet 5 and a liquid outlet 6.

[0009] A plurality of battery modules 2, each battery module comprises a plurality of battery packs, and a sensor is installed inside the battery pack to transmit the detected temperature and other data back to the control system.

[0010] The rubber sealing base 3 is fixed to the bottom of the energy storage battery PACK frame 1, and an opening is connected to the tail of the shunt frame 4 to ensure the water tightness of the flow channel at the bottom of the battery module.

[0011] The shunt frame 4 is fixed to the energy storage battery PACK box 1 by welding, and is provided with a slot for installing a proportional switch 8, and the tail is connected to the opening of the rubber sealing base 3.

[0012] The liquid inlet 5 and the liquid outlet 6 are directly opened on the energy storage battery PACK box 1, the liquid inlet 5 directly corresponds to the position of the diversion frame 4, and the liquid inlet 5 and the liquid outlet 6 are directly connected to the external liquid cooling circulation system.

[0013] The plastic strap 7 is used to bind and fix the battery module.

[0014] The proportional switch 8 is installed on the shunt frame 4 and is controlled by the control system according to the data collected by the sensor in the battery pack, so as to directly interfere with and adjust the flow state of the coolant in real time.

[0015] Furthermore, the height of the liquid outlet 6 can ensure that the height of the coolant in the PACK can at least immerse the battery module halfway, and the height of the coolant inside the PACK can be ensured by installing a regulating valve at the liquid outlet.

[0016] Furthermore, the top cover of the energy storage battery PACK box 1 is connected to the box body by bolts, and a fixing structure can be added inside the top cover to fix the battery module 2 to prevent the battery module 2 from being displaced due to vibration or the like during operation, thereby destroying the water tightness of the bottom flow channel of the battery module 2. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a top view of the energy storage battery PACK without the cover;

[0018] Figure 2 It is the main cross-section of the energy storage battery PACK;

[0019] Figure 3 It is a side cross-sectional view of the energy storage battery PACK through the battery pack;

[0020] Figure 4 It is a side cross-sectional view of the energy storage battery PACK without passing through the battery pack;

[0021] Figure 5 This is the main view of the shunt frame welded inside the energy storage battery PACK box;

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the diversion framework;

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the rubber sealing base. Specific implementation cases

[0024] The following is a more clear and explicit description of the actual application scenarios of the present invention in conjunction with the accompanying drawings. It should be noted that this case obviously only mentions a part of the embodiments of the present invention and does not represent all usage scenarios.

[0025] The present invention is a battery immersion liquid cooling system controlled by a proportional switch, comprising an energy storage battery PACK box 1, a battery module 2, a rubber sealing base 3, a shunt frame 4, a liquid inlet 5, a liquid outlet 6, a plastic strap 7, and a proportional switch 8.

[0026] The energy storage battery PACK box 1 is fixed on the external fixing frame and connected to the external liquid cooling circulation system through the liquid inlet 5 and the liquid outlet 6. The tail of the shunt frame 4 is connected to the entrance of the rubber sealing base 3 to ensure the separation of the flow channel in the shunt frame 4 from the coolant in the chamber of the energy storage battery PACK box 1; the rubber sealing base 3 and the battery module 2 jointly ensure the water tightness of the flow channel at the bottom of the battery module 2, and improve the adjustment efficiency of the proportional switch 8 in the shunt frame 4.

[0027] The working process of the present invention is:

[0028] The coolant in the external liquid cooling circulation system enters the diversion frame 4 through the liquid inlet 5, flows to the flow channel separated by the rubber sealing base 3 at the bottom of the battery module 2 at an appropriate flow rate after being adjusted by the proportional switch 8, returns to the front cavity of the battery module 2 through the gap on the rear side of the battery module 2 and the gap on the side of the battery module 2, and then returns to the external liquid cooling circulation system from the liquid outlet 6.

Claims

1. A battery immersion liquid cooling system, characterized in that: include: Energy storage battery PACK box 1 and several groups of battery modules 2; The energy storage battery PACK box 1 is composed of a main shell and an upper cover; The energy storage battery PACK box 1 has a chamber inside, and the battery module 2 is installed in the chamber; The battery module 2 is bound and fixed by a plastic binding band 7; A rubber sealing base 3 is provided inside the energy storage battery PACK frame 1; The battery module 2 is placed on a rubber sealing base 3; The energy storage battery PACK frame 1 is provided with a shunt frame 4 inside; The diversion frame 4 is provided with a proportional switch 8; The energy storage battery PACK frame 1 is provided with a liquid inlet 5 and a liquid outlet 6; The liquid inlet 5 corresponds to the circular part on the diversion frame 4, and is connected to the liquid outlet 6 through the bottom gap of the battery module 2, the rear gap of the battery module 2, the side gap of the battery module 2, and the front chamber of the battery module 2, and operates together with the liquid cooling circulation system outside the PACK.

2. The battery immersion liquid cooling system according to claim 1, characterized in that: It does not contain coolant storage and circulation power parts, and is used in conjunction with an external liquid cooling circulation system.

3. The battery immersion liquid cooling system according to claim 1, characterized in that: When it is working, the coolant will fill most of the cavity space to ensure that the battery module 2 is immersed in the coolant.

4. The battery immersion liquid cooling system according to claim 1, characterized in that: The coolant it uses has properties such as insulation, high ignition point and high boiling point.

5. The battery immersion liquid cooling system according to claim 1, characterized in that: A sensor is installed inside each battery pack in the battery module 2, and the proportional switch is adjusted by the data sent back by the sensor.

6. The battery immersion liquid cooling system according to claim 1, characterized in that: The shunt frame 4 is fixed on the energy storage battery PACK box 1 by welding.

7. The battery immersion liquid cooling system according to claim 1, characterized in that: The coolant flow rate of each flow channel is controlled by a plurality of proportional switches 8 on the flow splitting frame 4 .

8. The battery immersion liquid cooling system according to claim 1, characterized in that: The flow channel in the flow splitter frame 4 ensures sealing and is not directly connected to the coolant in the adjacent cavity.

9. The battery immersion liquid cooling system according to claim 1, characterized in that: The rubber sealing base 3 is provided with openings at the front and rear for communication, and the sides are sealed to achieve separation of the bottom and side flow channels.

10. The battery immersion liquid cooling system according to claim 1, characterized in that: The rubber sealing base 3 is interference-fitted with the tail end of the diversion frame 4 to ensure the water tightness of the flow channel.

11. The battery immersion liquid cooling system according to claim 1, characterized in that: The battery module 2 is secured tightly by a plastic band 7 , which together with the rubber sealing base 3 achieves water tightness of the flow channel at the bottom of the battery module 2 .

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