Liquid cooling circulation structure for improving thermal performance of sodium ion battery

Abstract

The utility model provides a liquid cooling circulation structure for improving thermal performance of a sodium ion battery, which comprises the following components: a sodium ion battery which comprises a cooling member which is internally provided with a cooling channel and is used for cooling the sodium ion battery; the water electrolysis hydrogen production device is used for ionizing water into hydrogen and oxygen; the liquefying device is used for liquefying the hydrogen; the conveying unit is used for conveying the liquid hydrogen into the cooling part and cooling the sodium ion battery; and the power generation device is used for generating power according to renewable resources and supplying power to the water electrolysis hydrogen production device, the liquefaction device and the conveying unit.

Description

TECHNICAL FIELD

[0001] The utility model belongs to sodium ion energy storage battery field especially relates to a liquid cooling circulation structure of sodium ion battery heat performance promotion. BACKGROUND

[0002] Under the background of "double carbon" era, energy storage is the key technology to solve the potential safety and stability problems brought by large-scale renewable energy grid connection. Sodium ion battery has become the focus of battery energy storage field due to its good safety performance, environmental friendliness and other advantages.

[0003] At present, the sodium ion battery thermal management system mainly adopts air cooling and liquid cooling technologies. Although the air cooling technology has simple structure, it has large volume and low heat dissipation efficiency. The traditional cooling liquid used in liquid cooling technology has poor temperature uniformity and low thermal management efficiency under the condition of rapid charging and discharging. UTILITY MODEL CONTENTS

[0004] The utility model provides a liquid cooling circulation structure of sodium ion battery heat performance promotion can promote the cooling effect to sodium ion battery, the system includes:

[0005] Sodium ion battery, the sodium ion battery includes cooling piece, the cooling piece has cooling channel inside, the cooling piece is used for cooling sodium ion battery to the temperature;

[0006] Hydrogen production device for water electrolysis into hydrogen and oxygen;

[0007] Liquefaction device for liquefying hydrogen;

[0008] Conveying unit for conveying liquid hydrogen into cooling piece and cooling sodium ion battery;

[0009] Power generation device for power generation according to renewable resources, power supply for water electrolysis hydrogen production device, liquefaction device and conveying unit.

[0010] Optionally, the sodium ion battery includes a plurality of interval distribution battery core and phase change material piece, and the phase change material piece is arranged between the adjacent two battery core.

[0011] Optionally, the water electrolysis hydrogen production device can be any one of alkaline water electrolysis device, proton exchange membrane water electrolysis hydrogen production device, anion membrane water electrolysis hydrogen production device and solid oxide water electrolysis hydrogen production device.

[0012] Optionally, the liquefaction device converts hydrogen into liquid hydrogen through Claude cycle or Lind-Tomson cycle.

[0013] Optionally, the conveying unit is a circulating pump.

[0014] Optionally, the power generation device can be any one or more of a solar power generation device, a hydroelectric power generation device, and a wind power generation device.

[0015] Optionally, the system further comprises:

[0016] The liquid storage tank is arranged at the bottom of the sodium ion battery, and the heat-conducting plate is arranged between the liquid storage tank and the sodium ion battery.

[0017] Optionally, the liquid storage tank comprises a liquid storage inner tank and a cold insulation outer tank, the liquid storage inner tank is arranged in the cold insulation outer tank, and a vacuum is maintained between the liquid storage inner tank and the cold insulation outer tank.

[0018] Optionally, the heat-conducting plate is a copper plate.

[0019] Optionally, the system further comprises:

[0020] The gas-liquid separator is in communication with the liquid outlet of the cooling member at one end and in communication with the liquid inlet of the conveying unit at the other end, and is used for gas-liquid separation of hydrogen output by the cooling member and conveying of liquid hydrogen into the liquid storage tank through the conveying unit.

[0021] The technical scheme provided by the embodiments of the present disclosure has the following beneficial effects:

[0022] In the embodiments of the present disclosure, a liquid cooling circulation structure for improving the thermal performance of a sodium ion battery is provided. The system comprises a sodium ion battery, a water electrolysis hydrogen production device, a liquefaction device, a conveying unit, and a power generation device. Renewable energy is generated by the power generation device, and the water electrolysis hydrogen production device produces hydrogen and oxygen by using the electricity provided by the power generation device. The oxygen can be stored for downstream industries, the hydrogen is liquefied by the liquefaction device, and then conveyed to the cooling member of the sodium ion battery by the conveying unit to cool the sodium ion battery. The high specific heat capacity and high storage density of liquid hydrogen are used to ensure that the temperature of the sodium ion battery is always within a safe threshold, thereby achieving effective and stable thermal management. The hydrogen is produced by unbalanced power in the new power system, which can effectively alleviate the potential risks caused by the randomness and volatility of renewable resources such as wind and light in the system, improve the utilization rate of renewable energy, and the produced liquid hydrogen and hydrogen can also be used in chemical industry, aerospace, hydrogen fuel cells / gas turbines and many other fields, thereby promoting energy transformation and economic development of the hydrogen energy upstream and downstream industries. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to make the technical scheme of the utility model or the prior art clearer, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description. Obviously, the drawings described below are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0024] Figure 1 A structure diagram of a liquid cooling circulation structure for improving the thermal performance of a sodium ion battery is provided for the embodiment of the present disclosure.

[0025] Figure 2 A structure diagram of a sodium ion battery is provided for the embodiment of the present disclosure.

[0026] The reference signs are as follows:

[0027] 1: sodium ion battery; 11: cooling piece; 111: liquid inlet; 112: liquid outlet; 12: battery cell; 13: phase change material piece;

[0028] 2: hydrogen production device by electrolysis of water; 21: oxygen downstream industry; 3: liquefaction device; 4: conveying unit; 5: power generation device; 6: transformer and power electronic equipment; 7: liquid storage tank; 8: heat conduction plate; 9: gas-liquid separator; 91: hydrogen downstream industry; 10: conveying pipeline. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the utility model clearer, the following will combine the drawings in the utility model to clearly and completely describe the technical scheme in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0030] Liquid hydrogen has high storage density, large specific heat capacity, is clean and pollution-free, and plays an important role in aerospace and other fields, and is one of the key development fields of the country. In view of the problems existing in the above-mentioned traditional liquid cooling technology, the utility model utilizes the power generation capacity of new energy sources to produce liquid hydrogen in a new power system, and designs a liquid cooling circulation structure optimization structure for improving the thermal performance of a sodium ion battery, which improves the thermal management performance of the sodium ion battery, increases the utilization rate of renewable energy sources, reduces the loss of abandoned wind and light, and provides a new solution for large-scale sodium ion power station construction planning of the system.

[0031] Figure 1 A structure diagram of a liquid cooling circulation structure for improving the thermal performance of a sodium ion battery is provided for the embodiment of the present disclosure. Referring to Figure 1 , the system comprises:

[0032] The sodium-ion battery 1 comprises a cooling piece 11, which has a cooling channel inside and is used to cool the sodium-ion battery 1.

[0033] The water electrolysis hydrogen production device 2 is used to electrolyze water into hydrogen and oxygen.

[0034] The liquefaction device 3 is used to liquefy hydrogen.

[0035] The conveying unit 4 is used to convey liquid hydrogen into the cooling piece 11 to cool the sodium-ion battery 1.

[0036] The power generation device 5 is used to generate electricity by using renewable resources to supply power to the water electrolysis hydrogen production device 2, the liquefaction device 3 and the conveying unit 4.

[0037] In the embodiment of the present disclosure, a liquid cooling circulation structure for improving the thermal performance of a sodium-ion battery is provided, which comprises a sodium-ion battery, a water electrolysis hydrogen production device, a liquefaction device, a conveying unit and a power generation device. Renewable energy is used to generate electricity by the power generation device, and the water electrolysis hydrogen production device produces hydrogen and oxygen by using the electricity provided by the power generation device. The oxygen can be stored for downstream industries, the hydrogen is liquefied by the liquefaction device and conveyed to the cooling piece of the sodium-ion battery by the conveying unit to cool the sodium-ion battery. By using the high specific heat capacity and high storage density characteristics of liquid hydrogen, the temperature of the sodium-ion battery is ensured to be always within the safety threshold, and effective and stable thermal management is achieved. Hydrogen is produced by using unbalanced power in the new power system, which can effectively alleviate the potential risks caused by the randomness and volatility of wind and light renewable resources in the system, improve the utilization rate of renewable energy, and the produced liquid hydrogen and hydrogen can also be used in many fields such as chemical industry, aerospace and hydrogen fuel cell / gas turbine, etc., to promote the energy transformation and economic development of the upstream and downstream industries of hydrogen energy.

[0038] Figure 2 A structural schematic diagram of a sodium-ion battery is provided in the embodiment of the present disclosure. Figure 2 A top view of a sodium-ion battery is shown in FIG. Figure 2 The sodium-ion battery 1 comprises a plurality of spaced battery cells 12 and a phase change material piece 13 arranged between adjacent two battery cells 12.

[0039] In the embodiment of the present disclosure, the phase change material piece is arranged inside the sodium-ion battery, which can further ensure the cooling effect of the sodium-ion battery.

[0040] In the embodiment of the present disclosure, the cooling channel in the cooling piece 11 can adopt an M shape, a snake shape or the like, which is not limited in the present disclosure.

[0041] In the embodiments of the present disclosure, the phase change material 13 can be paraffin, graphite and other composite materials that can thermally manage the battery cell without consuming additional energy.

[0042] Referring again to Figure 1 In the embodiments of the present disclosure, the water electrolysis hydrogen production device 2 can be any one of an alkaline water electrolysis device, a proton exchange membrane water electrolysis hydrogen production device, an anion membrane water electrolysis hydrogen production device and a solid oxide water electrolysis hydrogen production device.

[0043] In the embodiments of the present disclosure, the above-mentioned device has good hydrogen production effect. Of course, the water electrolysis hydrogen production device can also be other devices, which are not limited in the present disclosure.

[0044] In the embodiments of the present disclosure, the oxygen produced by the water electrolysis hydrogen production device 2 is transported to the downstream industry 21 for utilization.

[0045] In the embodiments of the present disclosure, the liquefaction device 3 converts hydrogen into liquid hydrogen through Claude cycle or Lind-Tomson cycle. The liquefaction effect of the above-mentioned cycle is good, and other cycle devices can also be used, which are not limited in the present disclosure.

[0046] In the embodiments of the present disclosure, the transportation unit 4 is a circulating pump. The circulating pump can circulate and transport liquid hydrogen to the cooling member.

[0047] In the embodiments of the present disclosure, the power generation device 5 can be any one or more of a solar power generation device, a hydroelectric power generation device and a wind power generation device. Through the above-mentioned device, renewable resources can be used for power generation.

[0048] In the embodiments of the present disclosure, the system further comprises a transformer and power electronic equipment 6, which is used to convert the power generated by the power generation device 5 into direct current suitable for the operation of the water electrolysis hydrogen production device.

[0049] In the embodiments of the present disclosure, the system further comprises:

[0050] The liquid storage tank 7 is arranged at the bottom of the sodium ion battery 1, and the heat conduction plate 8 is arranged between the liquid storage tank 7 and the sodium ion battery 1.

[0051] In the embodiments of the present disclosure, the liquid hydrogen is stored in the liquid storage tank, the liquid hydrogen is transported to the cooling member of the sodium ion battery by the circulating pump to cool the sodium ion battery, and the liquid hydrogen in the liquid storage tank can also be used for downstream industries. The heat conduction plate is arranged, and the heat conduction plate can transmit the heat of the sodium ion battery to the liquid storage tank, thereby further cooling the sodium ion battery.

[0052] In the embodiment of the present disclosure, the liquid storage tank 7 comprises a liquid storage inner tank and a cold insulation outer tank, the liquid storage inner tank is arranged in the cold insulation outer tank, and a vacuum is maintained between the liquid storage outer tank and the cold insulation outer tank.

[0053] In the embodiment of the present disclosure, the cold insulation outer tank can further ensure the low-temperature environment of the liquid hydrogen in the liquid storage inner tank, and reduce heat exchange with the external environment

[0054] In the embodiment of the present disclosure, the heat-conducting plate 8 is a copper plate. The copper plate has the characteristics of good heat conductivity, high low-temperature strength, and easy connection, and is more conducive to reducing the temperature of the sodium ion battery.

[0055] In the embodiment of the present disclosure, the system further comprises:

[0056] The gas-liquid separator 9 is in communication with the liquid outlet 112 of the cooling device 11 at one end and in communication with the liquid inlet of the conveying unit 4 at the other end, and the gas-liquid separator 9 is used for gas-liquid separation of hydrogen output by the cooling device 11 and conveying liquid hydrogen to the liquid storage tank 7 through the conveying unit 4.

[0057] In the embodiment of the present disclosure, the gas-liquid separator is arranged, the hydrogen gas-liquid mixture after the cooling device is separated through the gas-liquid separator, the liquid hydrogen can be used again through the liquid hydrogen pipeline under the action of the circulating pump, and the hydrogen gas can be used in the upstream and downstream industrial fields of hydrogen fuel cells / gas turbines and chemical industry.

[0058] The hydrogen gas separated by the gas-liquid separator is conveyed to the hydrogen downstream industry 91 for use.

[0059] In the embodiment of the present disclosure, the liquid hydrogen is conveyed in the system through the conveying pipeline 10, and the conveying pipeline 10 and the surface of the liquid storage tank 7 are provided with multiple layers of heat insulation of aluminum foil and glass paper to shield the heat radiation effect and achieve the cold insulation effect.

[0060] In the embodiment of the present disclosure, the liquid hydrogen flows into the cooling device 11 through the liquid inlet 111 by the circulating pump through the conveying pipeline 10, flows out of the cooling device through the liquid outlet 112, and realizes the thermal management of the sodium ion battery by using the circulating cooling and conduction cooling.

[0061] The operation mode of the liquid cooling circulation structure for improving the thermal performance of the sodium ion battery provided in the embodiment of the present disclosure is as follows:

[0062] In the first step, the unbalanced power generated by the randomness and volatility of renewable resources such as wind and light in the new power system is converted into direct current required by the water electrolysis hydrogen production device through the transformer and power electronic equipment, the water electrolysis hydrogen production device uses water as raw material, and decomposes water into hydrogen and oxygen by using electric energy.

[0063] Second step, hydrogen produced by the hydrogen production device electrolyzes water through the liquefaction device to generate liquid hydrogen and store it in the liquid hydrogen storage tank.

[0064] Third step, the sodium ion battery controller collects system operation state information in real time through temperature sensors, liquid level sensors and flow sensors, and accepts scheduling instructions from the upper control unit. When the battery temperature is too high, the battery module exchanges heat with the phase change material and the conduction cooling and the battery cell on one hand, and on the other hand, it can pump liquid hydrogen into the cooling element through the circulating pump, reduce the temperature of the battery module through the heat exchange between the liquid hydrogen and the battery cell, and realize temperature control.

[0065] Fourth step, the hydrogen gas and liquid mixture after the cooling element is separated through the gas-liquid separator. The liquid hydrogen can be pumped into the liquid hydrogen storage tank for secondary use by the circulating pump. The hydrogen gas can not only be liquefied again through the hydrogen liquefaction device, but also be directly supplied to chemical industry, hydrogen fuel cell / gas turbine and many other fields.

[0066] Fifth step, the sodium ion battery controller monitors the operation state of the battery module in real time through the sensor, and uploads the battery state information to the upper control unit to realize closed-loop control of large-scale sodium ion energy storage power station and ensure the safe and stable operation of the energy storage power station.

[0067] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A liquid cooling circulation structure for improving thermal performance of a sodium-ion battery, characterized by, The application relates to a sodium ion battery, an electrolytic water hydrogen production device, a liquefaction device, a delivery unit and a power generation device. The sodium ion battery comprises a cooling piece with a cooling channel inside, which is used for cooling the sodium ion battery. The electrolytic water hydrogen production device is used for electrolyzing water into hydrogen and oxygen. The liquefaction device is used for liquefying hydrogen. The delivery unit is used for delivering liquid hydrogen into the cooling piece to cool the sodium ion battery. The power generation device is used for generating power according to renewable resources to supply power to the electrolytic water hydrogen production device, the liquefaction device and the delivery unit.

2. The liquid-cooling circulation structure for improving thermal performance of a sodium-ion battery according to claim 1, wherein The sodium ion battery comprises a plurality of interval-distributed battery cells and a phase change material piece arranged between two adjacent battery cells.

3. The liquid-cooling circulation structure for improving thermal performance of a sodium-ion battery according to claim 1, wherein The electrolytic water hydrogen production device can be any one of an alkaline electrolytic water device, a proton exchange membrane electrolytic water hydrogen production device, an anion membrane electrolytic water hydrogen production device and a solid oxide electrolytic water hydrogen production device.

4. The liquid-cooling circulation structure for improving thermal performance of a sodium-ion battery according to claim 1, wherein The liquefaction device converts hydrogen into liquid hydrogen through Claude cycle or Linde-Thomson cycle.

5. The liquid-cooling circulation structure for improving the thermal performance of a sodium-ion battery according to claim 1, wherein, The delivery unit is a circulating pump.

6. The liquid-cooling circulation structure for improving the thermal performance of a sodium-ion battery according to claim 1, wherein, The power generation device can be any one or more of a solar power generation device, a hydroelectric power generation device and a wind power generation device.

7. The liquid-cooling circulation structure for improving thermal performance of a sodium-ion battery according to claim 1, wherein The application further comprises a liquid storage tank and a heat conduction plate. The liquid storage tank is arranged at the bottom of the sodium ion battery, and the heat conduction plate is arranged between the liquid storage tank and the sodium ion battery.

8. The liquid-cooling circulation structure for improving the thermal performance of a sodium-ion battery according to claim 7, characterized in that, The liquid storage tank comprises a liquid storage inner tank and a cold preservation outer tank, the liquid storage inner tank is arranged in the cold preservation outer tank, and a vacuum is maintained between the liquid storage inner tank and the cold preservation outer tank.

9. The liquid-cooling circulation structure for improving the thermal performance of a sodium-ion battery according to claim 7, wherein, The heat conduction plate is a copper plate.

10. The liquid-cooling circulation structure for improving the thermal performance of a sodium-ion battery according to claim 7, wherein, The application further comprises a gas-liquid separator. One end of the gas-liquid separator is communicated with a liquid outlet of the cooling piece, and the other end is communicated with a liquid inlet of the delivery unit. The gas-liquid separator is used for separating hydrogen output by the cooling piece into gas and liquid, and delivering liquid hydrogen into the liquid storage tank through the delivery unit.

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