Immersion type liquid cooling energy storage battery safety protection device

Abstract

The utility model relates to the technical field of energy storage batteries, and discloses an immersion type liquid cooling energy storage battery safety protection device, which solves the problems of low temperature control efficiency of the existing air cooling and complex structure and temperature consistency of the traditional liquid cooling, and comprises a protection shell, and a base is fixedly arranged at the bottom of the protection shell; a battery module is installed in the protective shell, a cover plate is arranged at the top of the protective shell, a liquid outlet and a liquid inlet are formed in the outer side of the protective shell, and the liquid outlet is located under the liquid inlet; according to the utility model, the plurality of screw holes are formed in the top of the base, so that the battery module can be conveniently fixed at the top of the base, then the battery module can be mounted in the protective shell, and cooling liquid can be injected into the protective shell through the liquid inlet, so that the battery module can be directly immersed into the cooling liquid; the cooling liquid can conveniently and directly absorb heat generated by the battery module, so that the heat exchange efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of energy storage batteries, in particular to an immersion type liquid-cooled energy storage battery safety protection device. Background Art

[0002] With the global pursuit of renewable energy and the increasingly severe climate change problem, governments and energy industries are seeking to reduce dependence on fossil fuels and promote the use of clean energy. As a key technology for balancing the intermittency of renewable energy and improving grid stability, the development of energy storage battery technology has received great attention. In application areas such as home energy storage and industrial and commercial energy storage, energy storage battery technology is gradually becoming an important development direction to support the use of renewable energy, improve grid stability and optimize energy consumption structure. The power system is facing a trend of transformation from centralized to distributed. Energy storage batteries can play an important role in this transformation. They can not only serve as backup power sources for households and commercial users, but also participate in peak load regulation, frequency regulation and voltage support of the power grid, improving the flexibility and resilience of the power grid. In recent years, energy storage battery technology has made significant progress, especially the energy density, cycle life and safety of lithium batteries have been greatly improved.

[0003] In the context of the current energy transformation and modernization of the power system, the performance requirements for the temperature management system of energy storage batteries are also increasing. The mainstream energy storage temperature control technology solutions on the market are currently divided into air cooling and traditional liquid cooling. Air cooling uses low-temperature air as a medium, and uses natural wind or fans to generate heat convection with the battery cells to reduce the battery temperature. The air cooling structure is simple, but the heat exchange efficiency is low and precise temperature control cannot be achieved. The traditional liquid cooling solution uses coolants such as water, ethanol, and refrigerants. It is in indirect contact with the battery cells through the guide grooves evenly distributed on the liquid cooling plate. It is close to the heat source, has high heat exchange efficiency, and low energy consumption. It can ensure the consistency of battery cell temperature to a certain extent. Since the coolant does not directly contact the battery, a large temperature gradient may be generated in the battery pack, especially in the case of high-power discharge or fast charging. The traditional liquid cooling system has a complex structure and may require more frequent maintenance and inspection to ensure smooth flow of the coolant and normal operation of the system. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides an immersion liquid-cooled energy storage battery safety protection device, which effectively solves the problems of inefficient temperature control of current air cooling and complex structure and temperature consistency of traditional liquid cooling.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an immersion-type liquid-cooled energy storage battery safety protection device, comprising a protective shell, a base is fixedly installed at the bottom of the protective shell, a battery module is installed inside the protective shell, a cover plate is provided on the top of the protective shell, a drain port and a liquid inlet are provided on the outside of the protective shell, the drain port is located directly below the liquid inlet, two battery management modules are symmetrically fixedly installed on the outside of the protective shell, a negative electrode junction box and a positive electrode junction box are provided between the two battery management modules, and a manual maintenance switch is installed on the outside of the protective shell.

[0006] Preferably, a pressure relief valve is installed on the cover plate, and a liquid level sensor is installed inside the protective shell.

[0007] Preferably, a condenser is fixedly installed inside the protective shell, and a water inlet pipe and a drain pipe are symmetrically fixedly connected to the condenser. One end of the water inlet pipe and the drain pipe away from the condenser extends to the outside of the protective shell. A booster pump is fixedly installed on the outside of the protective shell, and a connecting pipe is fixedly connected between the booster pump and the drain pipe.

[0008] Preferably, screw holes are provided on the top of the base near the four corners, and the battery module is located on the top of the base.

[0009] Preferably, the protective shell and the cover plate are both made of fiberglass.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] (1) The utility model provides a plurality of screw holes on the top of the base, so that the battery module can be fixed on the top of the base, and then the battery module can be installed inside the protective shell, and the coolant can be injected into the protective shell through the liquid inlet, so that the battery module can be directly immersed in the coolant, so that the coolant can directly absorb the heat generated by the battery module, thereby improving the heat exchange efficiency;

[0012] (2) The new type facilitates the transfer of heat from the inside of the protective shell to the external environment through the coordination between the booster pump and the drain pipe as well as the water inlet pipe and the condenser, thereby keeping the battery module within the optimal operating temperature range. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention.

[0014] In the attached picture:

[0015] Figure 1 This is a schematic diagram of the structure of the safety protection device for the immersion type liquid-cooled energy storage battery of the utility model;

[0016] Figure 2 This is a schematic diagram of the side view structure of the protective shell of the utility model;

[0017] Figure 3 This is a schematic diagram of the disassembled structure of the cover plate and the protective shell of the utility model;

[0018] In the figure: 1. Protective shell; 2. Base; 3. Liquid level sensor; 4. Cover; 5. Pressure relief valve; 6. Manual maintenance switch; 7. Battery management module; 8. Negative terminal box; 9. Positive terminal box; 10. Booster pump; 11. Water inlet pipe; 12. Drain pipe; 13. Connecting pipe; 14. Drain port; 15. Liquid inlet; 16. Battery module; 17. Condenser. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] Embodiment 1, by Figure 1-3 The utility model includes a protective shell 1, a base 2 is fixedly installed at the bottom of the protective shell 1, a battery module 16 is installed inside the protective shell 1, a cover plate 4 is provided on the top of the protective shell 1, the protective shell 1 and the cover plate 4 are both made of fiberglass, a drain port 14 and a liquid inlet 15 are provided on the outside of the protective shell 1, the drain port 14 is located directly below the liquid inlet 15, two battery management modules 7 are symmetrically fixedly installed on the outside of the protective shell 1, a negative terminal box 8 and a positive terminal box 9 are provided between the two battery management modules 7, a manual maintenance switch 6 is installed on the outside of the protective shell 1, a pressure relief valve 5 is installed on the cover plate 4, a liquid level sensor 3 is installed inside the protective shell 1, screw holes are provided at the top of the base 2 near the four corners, and the battery module 16 is located on the top of the base 2;

[0021] In use, firstly, a plurality of screw holes are set on the top of the base 2 to facilitate fixing the battery module 16 on the top of the base 2, so as to facilitate the subsequent assembly and maintenance. After the battery module 16 is installed inside the protective shell 1, the cover plate 4 is then fixed on the top of the protective shell 1, and the coolant is injected into the protective shell 1 through the liquid inlet 15. The coolant is 3M Novec electronic fluorinated liquid, which is a non-conductive, non-flammable dielectric fluid with high thermal conductivity to achieve rapid heat transfer of the battery. At the same time, it is biodegradable and non-toxic to reduce the impact on the environment. After the coolant is injected into the protective shell 1, the battery module 16 in the protective shell 1 is directly and completely immersed in the coolant to achieve direct heat exchange and improve the thermal management efficiency. The protective shell 1 and the cover plate 4 made of glass fiber are manufactured by the mold coating process to achieve lightweight and high strength, and have good corrosion resistance to resist long-term contact with the coolant.

[0022] Specifically, by Figure 2-3 It is shown that a condenser 17 is fixedly installed inside the protective shell 1, and a water inlet pipe 11 and a drain pipe 12 are symmetrically fixedly connected to the condenser 17. One end of the water inlet pipe 11 and the drain pipe 12 away from the condenser 17 extends to the outside of the protective shell 1. A booster pump 10 is fixedly installed on the outside of the protective shell 1, and a connecting pipe 13 is fixedly connected between the booster pump 10 and the drain pipe 12;

[0023] When in use, the condenser 17 is first fixed inside the protective shell 1, and the water inlet pipe 11 and the drain pipe 12 on the condenser 17 are extended to the outside of the protective shell 1. At the same time, the drain pipe 12 is fixed with a booster pump 10 through a connecting pipe 13. When the condenser 17 is in use, the heat inside the protective shell 1 is transferred to the external environment to keep the battery module 16 within the optimal operating temperature range.

Claims

1. An immersion type liquid-cooled energy storage battery safety protection device, comprising a protective shell (1), characterized in that: A base (2) is fixedly mounted on the bottom of the protective shell (1), a battery module (16) is mounted inside the protective shell (1), a cover plate (4) is mounted on the top of the protective shell (1), a liquid discharge port (14) and a liquid inlet (15) are mounted on the outside of the protective shell (1), the liquid discharge port (14) is located directly below the liquid inlet (15), two battery management modules (7) are symmetrically fixedly mounted on the outside of the protective shell (1), a negative electrode junction box (8) and a positive electrode junction box (9) are mounted between the two battery management modules (7), and a manual maintenance switch (6) is mounted on the outside of the protective shell (1).

2. The safety protection device for an immersed liquid-cooled energy storage battery according to claim 1, characterized in that: A pressure relief valve (5) is installed on the cover plate (4), and a liquid level sensor (3) is installed inside the protective shell (1).

3. The safety protection device for an immersed liquid-cooled energy storage battery according to claim 1, characterized in that: A condenser (17) is fixedly installed inside the protective shell (1), and a water inlet pipe (11) and a drain pipe (12) are symmetrically fixedly connected to the condenser (17). One end of the water inlet pipe (11) and the drain pipe (12) away from the condenser (17) both extend to the outside of the protective shell (1), and a booster pump (10) is fixedly installed on the outside of the protective shell (1), and a connecting pipe (13) is fixedly connected between the booster pump (10) and the drain pipe (12).

4. The safety protection device for an immersed liquid-cooled energy storage battery according to claim 1, characterized in that: The top of the base (2) is provided with screw holes near the four corners, and the battery module (16) is located on the top of the base (2).

5. The safety protection device for an immersed liquid-cooled energy storage battery according to claim 1, characterized in that: The protective shell (1) and the cover plate (4) are both made of glass fiber material.

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