A temperature control device for energy storage battery

Abstract

The present invention provides a temperature control device for an energy storage battery, the temperature control device for the energy storage battery comprising: a water pump, the liquid inlet of the water pump is connected to the liquid outlet of the energy storage battery through a first pipeline; a cooling device, the cooling device is connected to the liquid outlet of the water pump through a second pipeline; a heater, the first end of the heater is connected to the cooling device through a third pipeline; a liquid outlet temperature sensor and a liquid return temperature sensor, the liquid outlet temperature sensor is arranged on a fourth pipeline, the liquid return temperature sensor is connected to the first pipeline, the controller makes a first adjustment to the cooling device and the heater according to the difference between the current liquid outlet temperature detected by the liquid outlet temperature sensor and the predetermined liquid outlet temperature, or makes a second adjustment to the cooling device and the heater according to the difference between the current liquid return temperature detected by the liquid return temperature sensor and the predetermined liquid return temperature. The temperature control device for the energy storage battery of the present invention efficiently controls the temperature of the energy storage battery through the coolant, and has high stability.

Description

Technical Field

[0001] The present invention relates to the field of energy storage, and in particular to a temperature control device for an energy storage battery. Background Art

[0002] Energy storage batteries need to work in a suitable temperature environment. Too high or too low temperature will shorten the life of the energy storage battery and affect the use of the energy storage battery.

[0003] Existing energy storage batteries usually use air cooling for heat dissipation, which has a relatively low heat dissipation efficiency and a greater impact of ambient temperature on the energy storage batteries. Summary of the invention

[0004] In view of the above problems in the prior art, an object of the present invention is to provide a temperature control device for an energy storage battery, which can efficiently control the temperature of the energy storage battery through a coolant and has high stability.

[0005] In order to solve the above problems, the present invention provides a temperature control device for an energy storage battery, the temperature control device for the energy storage battery comprising:

[0006] A water pump, wherein a liquid inlet of the water pump is connected to a liquid outlet of the energy storage battery through a first pipeline;

[0007] A cooling device, the cooling device is connected to the liquid outlet of the water pump through a second pipeline to cool the coolant, and the cooling of the cooling device is adjustable;

[0008] A heater, wherein a first end of the heater is connected to the cooling device through a third pipeline to heat the coolant from the cooling device, a second end of the heater is connected to the liquid inlet of the energy storage battery through a fourth pipeline, and the heating of the heater is adjustable;

[0009] a liquid outlet temperature sensor and a liquid return temperature sensor, wherein the liquid outlet temperature sensor is disposed on the fourth pipeline to detect a current liquid outlet temperature of the coolant in the fourth pipeline, and the liquid return temperature sensor is connected to the first pipeline to detect a current liquid return temperature of the coolant in the first pipeline;

[0010] A controller, wherein the controller is connected to the liquid outlet temperature sensor, the liquid return temperature sensor, the heater and the cooling device, and the controller performs a first adjustment on the cooling device and the heater according to a difference between the current liquid outlet temperature detected by the liquid outlet temperature sensor and a predetermined liquid outlet temperature, or performs a second adjustment on the cooling device and the heater according to a difference between the current liquid return temperature detected by the liquid return temperature sensor and a predetermined liquid return temperature.

[0011] Furthermore, the temperature control device also includes:

[0012] A liquid storage tank, the liquid storage tank is connected to the first pipeline via a fifth pipeline, the liquid storage tank is used to contain the coolant, an air bag is provided at one end of the liquid storage tank away from the liquid inlet / outlet of the liquid storage tank, the air bag can generate compression deformation according to the increase of the volume of the coolant in the liquid storage tank, and can generate expansion deformation according to the shortage of the coolant in the first pipeline, so as to push the coolant inside the liquid storage tank into the fifth pipeline, and then into the first pipeline;

[0013] a liquid infusion tube, wherein a liquid outlet end of the liquid infusion tube is connected to the first pipeline, and the coolant can be transported to the first pipeline through the liquid infusion tube;

[0014] A fluid infusion valve is connected to the fluid infusion tube to open / close the fluid infusion tube.

[0015] Furthermore, the temperature control device also includes:

[0016] a liquid replenishment pressure gauge, the liquid replenishment pressure gauge being connected to the liquid replenishment tube and being located between the liquid outlet end of the liquid replenishment tube and the liquid replenishment valve to detect the pressure of the coolant in the liquid replenishment tube;

[0017] A fluid replenishment pump, the fluid replenishment pump is connected to the liquid inlet end of the fluid replenishment tube to transport the coolant to the fluid replenishment tube;

[0018] The controller is also connected to the rehydration valve, the rehydration pump and the rehydration pressure gauge. When the controller starts the rehydration pump and opens the rehydration valve for rehydration, the rehydration pump and the rehydration valve are closed when the pressure of the coolant detected by the rehydration pressure gauge reaches a predetermined pressure.

[0019] Furthermore, the temperature control device also includes:

[0020] A liquid level sensor, the liquid level sensor is connected to the liquid storage tank to detect the current liquid level of the coolant in the liquid storage tank;

[0021] The controller is also connected to the liquid level sensor to start the liquid replenishing pump and open the liquid replenishing valve according to the current liquid level being lower than a predetermined liquid level.

[0022] Further, the diameter of the fifth pipeline is smaller than the diameter of the first pipeline.

[0023] Furthermore, the temperature control device also includes:

[0024] an exhaust valve connected to the liquid storage tank and adjacent to a liquid inlet / outlet of the liquid storage tank to exhaust gas in the liquid storage tank;

[0025] A pressure relief valve is connected to the liquid storage tank and is adjacent to the exhaust valve, so as to discharge the coolant when the pressure of the coolant in the liquid storage tank is greater than the maximum allowable pressure.

[0026] Furthermore, the temperature control device also includes:

[0027] A filter is provided on the fourth pipeline to filter the coolant from the heater.

[0028] Furthermore, the material of the housing of the filter is a metal material, and the temperature control device further comprises:

[0029] A semiconductor refrigeration sheet is connected to the housing, and the semiconductor refrigeration sheet can cool and heat the housing.

[0030] The controller is also connected to the semiconductor refrigeration chip to issue a first alarm and start the semiconductor refrigeration chip for cooling based on the current liquid outlet temperature being higher than a first predetermined value of the predetermined liquid outlet temperature, or to issue a second alarm and start the semiconductor refrigeration chip for heating based on the current liquid outlet temperature being lower than a second predetermined value of the predetermined liquid outlet temperature.

[0031] Furthermore, the controller controls the cooling device and the heater through the other one of the return liquid temperature sensor and the outlet liquid temperature sensor according to the failure of the other one of the return liquid temperature sensor and the outlet liquid temperature sensor.

[0032] The controller further calculates a temperature difference between the current liquid return temperature and the current liquid outlet temperature, and compensates for the first adjustment according to the temperature difference being greater than a predetermined difference.

[0033] Furthermore, the cooling device comprises:

[0034] A heat exchanger, the heat exchanger comprising a first channel and a second channel, the temperature of the second channel can be transferred to the first channel, and both ends of the first channel are connected to the second pipeline and the third pipeline respectively;

[0035] A compressor, wherein an air inlet of the compressor is connected to a first end of the second channel of the heat exchanger, the compressor can contain the refrigerant, and can compress the refrigerant so that the refrigerant becomes a high-temperature and high-pressure gaseous refrigerant;

[0036] a microchannel radiator connected to the exhaust port of the compressor to receive the refrigerant from the compressor and dissipate heat for the refrigerant so that the gaseous refrigerant becomes the liquid refrigerant;

[0037] A fan, the fan facing the microchannel radiator to cool the microchannel radiator;

[0038] an expansion valve, the expansion valve being connected to the microchannel radiator to receive the refrigerant from the microchannel radiator and converting the liquid refrigerant into the mist refrigerant, the opening of the expansion valve being adjustable, the expansion valve being connected to the second end of the second channel of the heat exchanger to discharge the mist refrigerant into the second channel;

[0039] The controller is also connected to the expansion valve, and adjusts the refrigeration of the cooling device by adjusting the opening of the expansion valve.

[0040] Due to the above technical solution, the present invention has the following beneficial effects:

[0041] According to the temperature control device of the energy storage battery of the present invention, the water pump extracts the coolant from the cooling channel in the energy storage battery through the first pipeline, and inputs the coolant into the cooling device through the second pipeline. The coolant can be cooled by the cooling device. The cooling device inputs the coolant into the heater through the third pipeline. The coolant can be heated by the heater. The heater inputs the coolant into the cooling channel of the energy storage battery through the fourth pipeline, thereby realizing the circulation temperature control of the energy storage battery. A return liquid temperature sensor is arranged on the first pipeline to detect the current return liquid temperature of the coolant. A liquid outlet temperature sensor is arranged on the fourth pipeline to detect the current liquid outlet temperature of the coolant. The controller adjusts the heater and the cooling device according to the difference between the current return liquid temperature and the predetermined return liquid temperature, so that the current return liquid temperature is stabilized at the predetermined return liquid temperature, or adjusts the heater and the cooling device according to the difference between the current liquid outlet temperature and the predetermined liquid outlet temperature, so that the current liquid outlet temperature is stabilized at the predetermined liquid outlet temperature. The temperature control device can stably and efficiently control the temperature of the energy storage battery, so that the energy storage battery is in a better environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solution of the present invention, the following briefly introduces the drawings required for use in the embodiments or prior art descriptions. Obviously, the drawings described below are only some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 is a schematic structural diagram of a temperature control device for an energy storage battery according to an embodiment of the present invention;

[0044] Figure 2 yes Figure 1 A schematic diagram of a partial structure of a temperature control device for an energy storage battery of an embodiment;

[0045] Figure 3 Schematic diagram of a temperature control device for an energy storage battery according to an embodiment of the present invention.

[0046] 100, water pump; 210, first pipeline; 220, second pipeline; 230, third pipeline; 240, fourth pipeline; 310, cooling device; 310, heat exchanger; 311, first channel; 312, second channel; 320, compressor; 330, microchannel radiator; 341, fan; 342, filter; 350, expansion valve; 400, heater; 510, filter; 520, semiconductor refrigeration chip; 610, liquid outlet temperature sensor; 620, liquid return temperature sensor; 710, liquid storage tank; 720, exhaust valve; 730, pressure relief valve; 740, fifth pipeline; 750, air bag; 760, liquid level sensor; 810, liquid infusion pipe; 820, liquid infusion valve; 830, liquid infusion pressure gauge; 840, liquid infusion pump; 900, energy storage battery. DETAILED DESCRIPTION

[0047] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0048] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0049] Next, a temperature control device for the energy storage battery 900 according to an embodiment of the present invention is described.

[0050] like Figures 1 to 3 As shown, the temperature control device of the embodiment of the present invention includes: a water pump 100, a cooling device 310, a heater 400, a liquid outlet temperature sensor 610, a liquid return temperature sensor 620 and a controller.

[0051] First, the water pump 100 is described. The liquid inlet of the water pump 100 is connected to the liquid outlet of the energy storage battery 900 through the first pipeline 210 .

[0052] A cooling channel for the flow of coolant is provided inside the energy storage battery 900. The temperature control device of the energy storage battery 900 provides coolant with an optimal temperature to the cooling channel. The coolant transfers the temperature to the energy storage battery 900, thereby keeping the energy storage battery 900 at an optimal temperature.

[0053] The water pump 100 is connected to the first end of the first pipeline 210, and the second end of the first pipeline 210 is connected to the liquid outlet of the energy storage battery 900. The water pump 100 extracts the coolant after heat exchange from the energy storage battery 900 to prevent the coolant after heat exchange from being retained in the energy storage battery 900.

[0054] Next, the cooling device 310 is described. The cooling device 310 is connected to the liquid outlet of the water pump 100 through the second pipe 220 to cool the coolant, and the cooling of the cooling device 310 is adjustable.

[0055] The cooling liquid from the water pump 100 can be cooled by the cooling device 310, and the cooling device 310 can be a water chiller, a cooling device 310 hereinafter, etc. The cooling of the cooling device 310 is adjustable, that is, the cooling amplitude is adjustable.

[0056] Next, the heater 400 is described. The first end of the heater 400 is connected to the cooling device 310 through the third pipeline 230 to heat the coolant from the cooling device 310, and the second end of the heater 400 is connected to the liquid inlet of the energy storage battery 900 through the fourth pipeline 240. The heating of the heater 400 is adjustable.

[0057] The heater 400 receives the coolant from the cooling device 310 through the third pipeline 230, and can heat the coolant, and can input the heated coolant into the liquid inlet of the energy storage battery 900 through the fourth pipeline 240. The heater 400 can be a pipeline heater. By adjusting the heating of the heater 400, the heating (i.e., the heating amplitude) of the heater 400 can be adjusted.

[0058] Next, the liquid outlet temperature sensor 610 and the liquid return temperature sensor 620 are described. The liquid outlet temperature sensor 610 is disposed on the fourth pipeline 240 to detect the current liquid outlet temperature of the coolant in the fourth pipeline 240, and the liquid return temperature sensor 620 is connected to the first pipeline 210 to detect the current liquid return temperature of the coolant in the first pipeline 210.

[0059] That is, the temperature of the coolant from the energy storage battery 900 is detected by the return liquid temperature sensor 620, and the temperature of the coolant to be input into the storage battery is detected by the outlet liquid temperature sensor 610.

[0060] Finally, the controller is described. The controller is connected to the liquid outlet temperature sensor 610, the liquid return temperature sensor 620, the heater 400 and the cooling device 310. The controller makes a first adjustment to the cooling device 310 and the heater 400 according to the difference between the current liquid outlet temperature detected by the liquid outlet temperature sensor 610 and the predetermined liquid outlet temperature, or makes a second adjustment to the cooling device 310 and the heater 400 according to the difference between the current liquid return temperature detected by the liquid return temperature sensor 620 and the predetermined liquid return temperature.

[0061] That is, the controller has two modes:

[0062] In mode 1, the controller performs a first adjustment on the cooling device 310 and the heater 400 according to the difference between the current liquid outlet temperature detected by the liquid outlet temperature sensor 610 and the predetermined liquid outlet temperature.

[0063] For example, the outlet temperature sensor 610 detects that the current outlet temperature of the coolant is 30 degrees, and the predetermined outlet temperature of the coolant is set to 20 degrees. The controller will increase the cooling amplitude of the cooling device 310 to further cool the coolant, so that the current outlet temperature of the coolant is reduced to 20 degrees. If the cooling is too much or the environment is too low, the current outlet temperature is reduced to 15 degrees, and the controller controls the heater 400 to start and / or reduce the cooling amplitude of the cooling device 310 to control the current outlet temperature of the coolant at 20 degrees. The current outlet temperature of the coolant is monitored by the outlet temperature sensor 610, and the controller adjusts the cooling device 310 and the heater 400 so that the current outlet temperature is the predetermined outlet temperature, which can ensure that the temperature of the coolant input to the energy storage battery 900 is at an optimal temperature.

[0064] Mode 2: The controller performs a second adjustment on the cooling device 310 and the heater 400 according to the difference between the current liquid return temperature detected by the liquid return temperature sensor 620 and the predetermined liquid return temperature.

[0065] For example, if the ambient temperature is too low, the return liquid temperature sensor 620 detects that the current return liquid temperature of the coolant is 10 degrees, and the preset outlet temperature of the coolant is set to 20 degrees, the controller will start the heater 400 to heat the coolant so that the current return liquid temperature of the coolant rises to 20 degrees. If the heater 400 heats too much, the ambient temperature is too high, or the temperature of the energy storage battery 900 is too high, and the current return liquid temperature rises to 25 degrees, the controller controls the heater 400 to reduce the heating amplitude and / or starts the cooling device 310 to control the current return liquid temperature of the coolant at 20 degrees. The return liquid temperature of the coolant is monitored by the return liquid temperature sensor 620, and the controller adjusts the cooling device 310 and the heater 400 so that the current return liquid temperature is the preset return liquid temperature, and the temperature of the coolant can be adjusted in time according to the heating condition of the energy storage battery 900.

[0066] In the temperature control device of the energy storage battery 900, the water pump 100 extracts the coolant from the cooling channel in the energy storage battery 900 through the first pipeline 210, and inputs the coolant into the cooling device 310 through the second pipeline 220. The coolant can be cooled by the cooling device 310. The cooling device 310 inputs the coolant into the heater 400 through the third pipeline 230. The coolant can be heated by the heater 400. The heater 400 inputs the coolant into the cooling channel of the energy storage battery 900 through the fourth pipeline 240, thereby realizing the circulation temperature control of the energy storage battery 900. A return liquid temperature sensor is set on the first pipeline 210. The device 620 detects the current return liquid temperature of the coolant, and the liquid outlet temperature sensor 610 is set on the fourth pipeline 240 to detect the current liquid outlet temperature of the coolant. The controller adjusts the heater 400 and the cooling device 310 according to the difference between the current return liquid temperature and the predetermined return liquid temperature, so that the current return liquid temperature is stabilized at the predetermined return liquid temperature, or adjusts the heater 400 and the cooling device 310 according to the difference between the current outlet liquid temperature and the predetermined outlet liquid temperature, so that the current outlet liquid temperature is stabilized at the predetermined outlet liquid temperature, so that the temperature control device can stably and efficiently control the temperature of the energy storage battery 900, so that the energy storage battery 900 is in a better environment.

[0067] In some embodiments of the present invention, the temperature control device further includes a liquid storage tank 710, a liquid infusion pipe 810 and a liquid infusion valve 820. The liquid storage tank 710 is connected to the first pipeline 210 through the fifth pipeline 740. The liquid storage tank 710 is used to contain coolant. An air bag 750 is provided at one end of the liquid storage tank 710 away from the liquid inlet / outlet of the liquid storage tank 710. The air bag 750 can generate compression deformation according to the increase in the volume of the coolant in the liquid storage tank 710, and can generate expansion deformation according to the shortage of coolant in the first pipeline 210, so as to push the coolant in the liquid storage tank 710 into the fifth pipeline 740 and then into the first pipeline 210. The liquid outlet end of the liquid infusion pipe 810 is connected to the first pipeline 210, and the coolant can be transported to the first pipeline 210 through the liquid infusion pipe 810. The liquid infusion valve 820 is connected to the liquid infusion pipe 810 to open / close the liquid infusion pipe 810.

[0068] like Figure 3 As shown, during the use of the temperature control device, the coolant inside it evaporates or leaks, which will lead to insufficient coolant, affecting the temperature control effect of the energy storage battery 900. If the coolant in the temperature control device is lost, the coolant in the first pipeline 210 will be insufficient, and the airbag 750 in the liquid storage tank 710 will change from compression deformation to expansion deformation, pushing the coolant in the liquid storage tank 710 to flow into the fifth pipeline 740, and then into the first pipeline 210, so that the first pipeline 210 is filled with coolant.

[0069] After long-term use, the liquid storage tank 710 needs to be refilled, or before each startup, the liquid storage tank 710 needs to be refilled. The refilling valve 820 can be opened to input coolant into the refilling pipe 810. The coolant in the liquid storage tank 710 flows into the first pipeline 210. After the coolant fills the first pipeline 210, it will overflow into the fifth pipeline 740, and flow into the liquid storage tank 710 from the fifth pipeline 740, thereby refilling the liquid storage tank 710. In this way, the first pipeline 210 can be refilled first and then the liquid storage tank 710 can be refilled. The temperature control device can control the temperature of the energy storage battery 900 while refilling, and can give priority to ensuring that there is sufficient coolant in each circulation pipeline of the temperature control device (the first pipeline 210, the second pipeline 220, the third pipeline 230 and the fourth pipeline 240 that are interconnected).

[0070] Optionally, the diameter of the fifth pipeline 740 is smaller than the diameter of the first pipeline 210 .

[0071] like Figure 2 As shown, the thinner fifth pipe 740 can reduce the disturbance to the coolant in the first pipe 210 and avoid increasing the cross-sectional area of ​​the first pipe 210 at the connection with the fifth pipe 740 too much, resulting in a decrease in the coolant flow rate and a decrease in heat exchange efficiency.

[0072] Furthermore, the temperature control device also includes a liquid replenishment pressure gauge 830 and a liquid replenishment pump 840. The liquid replenishment pressure gauge 830 is connected to the liquid replenishment tube 810 and is located between the liquid outlet end of the liquid replenishment tube 810 and the liquid replenishment valve 820 to detect the pressure of the coolant in the liquid replenishment tube 810. The liquid replenishment pump 840 is connected to the liquid inlet end of the liquid replenishment tube 810 to transport coolant to the liquid replenishment tube 810. The controller is also connected to the liquid replenishment valve 820, the liquid replenishment pump 840 and the liquid replenishment pressure gauge 830. When the controller starts the liquid replenishment pump 840 and opens the liquid replenishment valve 820 for replenishment, the liquid replenishment pump 840 and the liquid replenishment valve 820 are closed according to the pressure of the coolant detected by the liquid replenishment pressure gauge 830 reaching a predetermined pressure.

[0073] When fluid replenishment is needed, the controller opens the fluid replenishment valve 820 and starts the fluid replenishment pump 840. The fluid replenishment pump 840 can draw coolant from the outside to the fluid replenishment pipe 810, thereby replenishing the coolant. As the coolant flows into the first pipeline 210 and the liquid storage tank 710, the pressure of the coolant detected by the fluid replenishment pressure gauge 830 will rise. When the pressure reaches the predetermined pressure, the fluid replenishment pump 840 and the fluid replenishment valve 820 are closed to stop the fluid replenishment. Compared with replenishing the coolant to the predetermined liquid level of the liquid storage tank 710, this method controls the fluid replenishment according to the fluid replenishment pressure to ensure that the entire circulation pipeline is at a predetermined pressure, avoid the risk of the circulation pipeline being ruptured due to excessive coolant pressure, increase safety, and avoid the situation in which the liquid level fluctuation during the fluid replenishment of the liquid storage tank 710 leads to inaccurate level testing of the coolant in the liquid storage tank 710, resulting in incomplete fluid replenishment.

[0074] Furthermore, the temperature control device also includes a liquid level sensor 760. The liquid level sensor 760 is connected to the liquid storage tank 710 to detect the current liquid level of the coolant in the liquid storage tank 710. The controller is also connected to the liquid level sensor 760 to start the liquid replenishment pump 840 and open the liquid replenishment valve 820 according to the current liquid level being lower than the predetermined liquid level.

[0075] When the liquid level of the coolant in the liquid storage tank 710 drops to a predetermined level, the liquid replenishing pump 840 is started and the liquid replenishing valve 820 is opened, so that the liquid storage tank 710 can be replenished in time to avoid insufficient coolant in the first pipeline 210 due to untimely replenishment, which affects the temperature control of the energy storage battery 900.

[0076] In some embodiments of the present invention, the temperature control device includes an exhaust valve 720 and a pressure relief valve 730. The exhaust valve 720 is connected to the liquid storage tank 710 and is adjacent to the liquid inlet / outlet of the liquid storage tank to discharge the gas in the liquid storage tank 710. The pressure relief valve 730 is connected to the liquid storage tank 710 and is adjacent to the exhaust valve 720 to discharge the coolant in the liquid storage tank 710 when the pressure is greater than the maximum allowable pressure.

[0077] like Figure 3 As shown, the exhaust valve 720 and the pressure relief valve 730 are adjacent to the inlet / outlet of the liquid storage tank, that is, connected to the portion of the liquid storage tank 710 containing the coolant.

[0078] The gas in the temperature control device can be discharged through the exhaust valve 720. When the coolant expands due to heat or during the refilling process, gas may exist inside the temperature control device. The gas flows into the first pipeline 210, flows into the liquid storage tank 710 through the fifth pipeline 740, and is discharged from the exhaust valve 720. This prevents the gas from occupying the space of the coolant in the circulation pipeline and the liquid storage tank 710 and causing excessive pressure in the circulation pipeline and the liquid storage tank 710, thereby causing the circulation pipeline and the liquid storage tank 710 to be at risk of bursting.

[0079] The coolant of the temperature control device can be discharged through the pressure relief valve 730. Excessive coolant or coolant accumulation caused by local pipeline blockage will be discharged in time through the pressure relief valve 730 to avoid excessive coolant or accumulation of coolant causing pressure increase in the temperature control device, causing the circulation pipeline and the liquid storage tank 710 to burst at risk.

[0080] In some embodiments of the present invention, the temperature control device further includes a filter 510. The filter 510 is disposed on the fourth pipeline 240 to filter the coolant from the heater 400.

[0081] like Figure 3 As shown, the filter 510 can filter impurities in the circulation pipeline to prevent the impurities from clogging the circulation pipeline, affecting the flow of coolant and affecting the temperature control of the energy storage battery 900.

[0082] Furthermore, the outer shell of the filter 510 is made of metal material, and the temperature control device further comprises a semiconductor refrigeration sheet 520, which is connected to the outer shell. The semiconductor refrigeration sheet 520 can cool and heat the outer shell. The controller is also connected to the semiconductor refrigeration sheet 520, so as to issue a first alarm and start the semiconductor refrigeration sheet 520 for cooling according to the current liquid outlet temperature being higher than the first predetermined value of the predetermined liquid outlet temperature, or to issue a second alarm and start the semiconductor refrigeration sheet 520 for heating according to the current liquid outlet temperature being lower than the second predetermined value of the predetermined liquid outlet temperature. The controller switches the positive voltage and the negative voltage provided to the semiconductor refrigeration sheet 520, so as to realize the switching of cooling and heating of the semiconductor refrigeration sheet 520.

[0083] Under normal circumstances, the controller adjusts the heater 400 and the cooling device 310 according to the current return liquid temperature detected by the return liquid temperature sensor 620, or the controller adjusts the heater 400 and the cooling device 310 according to the current outlet liquid temperature detected by the outlet liquid temperature sensor 610. The current outlet liquid temperature of the coolant detected by the outlet liquid temperature sensor 610 has a small fluctuation range, and the current maximum outlet liquid temperature is not higher than the first predetermined value of the predetermined outlet liquid temperature, and the current minimum outlet liquid temperature is not lower than the second predetermined value of the predetermined outlet liquid temperature. If it exceeds this fluctuation range, it means that the temperature control of the cooling device 310 and the heater 400 is abnormal, and an alarm is issued in time to remind relevant personnel to deal with it in time. At this time, when the current liquid outlet temperature is higher than the first predetermined value of the predetermined liquid outlet temperature, the metal shell of the filter 510 is cooled by the semiconductor refrigeration sheet 520, thereby cooling the coolant in the shell; when the current liquid outlet temperature is lower than the second predetermined value of the predetermined liquid outlet temperature, the metal shell of the filter 510 is heated by the semiconductor refrigeration sheet 520, thereby heating the coolant in the shell, thereby avoiding the current liquid outlet temperature to be input into the energy storage battery 900 being abnormal, thereby avoiding the energy storage battery 900 from being abnormal, and increasing the stability of temperature control of the energy storage battery 900.

[0084] In some embodiments of the present invention, the controller controls the cooling device 310 and the heater 400 through the other one of the return liquid temperature sensor 620 and the outlet liquid temperature sensor 610 according to the failure of one of them. The controller also calculates the temperature difference between the current return liquid temperature and the current outlet liquid temperature, and compensates for the first adjustment according to the temperature difference being greater than the predetermined difference.

[0085] For example, if the return liquid temperature sensor 620 fails and the controller cannot read the value of the return liquid temperature sensor 620, the controller adjusts the cooling device 310 and the heater 400 according to the value of the current liquid outlet temperature of the liquid outlet temperature sensor 610, so that the current liquid outlet temperature reaches the predetermined liquid outlet temperature, thereby avoiding abnormal temperature control of the cooling liquid.

[0086] For example, the current return liquid temperature is 70 degrees, the current outlet liquid temperature is 20 degrees, the temperature difference is 50 degrees, and the predetermined difference is 30 degrees (the range of rapid cooling of the cooling device 310 under normal circumstances), indicating that the energy storage battery 900 is abnormal and the temperature rises too much. If it is still adjusted according to the current first adjustment, it is impossible to quickly adjust the emergency of the energy storage battery 900. At this time, the first adjustment is compensated, the heater 400 is turned off, and the refrigeration of the refrigeration device is increased, so as to quickly cool the coolant, and quickly cool the abnormally high temperature of the energy storage battery 900, so as to avoid the problem of delayed adjustment of the coolant temperature. In this way, it is possible to make adaptive adjustments in time according to the abnormal situation of the energy storage battery 900.

[0087] In some embodiments of the present invention, the cooling device 310 includes a heat exchanger 310, a compressor 320, a microchannel radiator 330, a fan 341 and an expansion valve 350. The heat exchanger 310 includes a first channel 311 and a second channel 312, the temperature of the second channel 312 can be transferred to the first channel 311, and the two ends of the first channel 311 are respectively connected to the second pipeline 220 and the third pipeline 230. The air inlet of the compressor 320 is connected to the first end of the second channel 312 of the heat exchanger 310, and the compressor 320 can contain refrigerant and compress the refrigerant so that the refrigerant becomes a high-temperature and high-pressure gaseous refrigerant. The microchannel radiator 330 is connected to the exhaust port of the compressor 320 to receive the refrigerant from the compressor 320, and dissipate the heat of the refrigerant so that the gaseous refrigerant becomes a liquid refrigerant. The fan 341 faces the microchannel radiator 330 to air-cool the microchannel radiator 330. The expansion valve 350 is connected to the microchannel radiator 330 to receive the refrigerant from the microchannel radiator 330 and change the liquid refrigerant into a mist refrigerant. The opening of the expansion valve 350 is adjustable. The expansion valve 350 is connected to the second end of the second channel 312 of the heat exchanger 310 to discharge the mist refrigerant into the second channel 312. The controller is also connected to the expansion valve 350, and the refrigeration of the cooling device 310 is adjusted by adjusting the opening of the expansion valve 350.

[0088] like Figure 1 and Figure 3 As shown, the compressor 320 changes the refrigerant into a high-temperature and high-pressure gaseous refrigerant, the microchannel radiator 330 receives the gaseous refrigerant from the compressor 320, and dissipates the heat of the refrigerant (the fan 341 blows air to the microchannel radiator 330, so that the temperature of the coolant inside the microchannel radiator 330 is reduced), so that other refrigerants become liquid refrigerants, the expansion valve 350 receives the refrigerant from the microchannel radiator 330, and changes the liquid refrigerant into a mist refrigerant, and inputs the mist refrigerant into the second channel 312 of the heat exchanger 310, thereby cooling the second channel 312 of the heat exchanger 310, and the low temperature of the second channel 312 can be transmitted to the first channel 311, so that the first channel 311 can cool the coolant received from the second pipeline 220, and input the cooled coolant into the third pipeline 230, so as to achieve rapid cooling of the coolant. The controller can control the opening of the expansion valve 350, so as to adjust the refrigeration of the refrigeration device. As a result, the coolant can be cooled efficiently and the cooling can be adjusted.

[0089] Optionally, a filter screen 342 is provided on a side of the fan 341 away from the microchannel radiator 330 to prevent larger debris from falling onto the fan 341 and affecting the rotation of the fan 341 .

[0090] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A temperature control device for an energy storage battery, characterized in that: The temperature control device comprises: A water pump, wherein a liquid inlet of the water pump is connected to a liquid outlet of the energy storage battery through a first pipeline; A cooling device, the cooling device is connected to the liquid outlet of the water pump through a second pipeline to cool the coolant, and the cooling of the cooling device is adjustable; A heater, wherein a first end of the heater is connected to the cooling device through a third pipeline to heat the coolant from the cooling device, a second end of the heater is connected to the liquid inlet of the energy storage battery through a fourth pipeline, and the heating of the heater is adjustable; a liquid outlet temperature sensor and a liquid return temperature sensor, wherein the liquid outlet temperature sensor is disposed on the fourth pipeline to detect a current liquid outlet temperature of the coolant in the fourth pipeline, and the liquid return temperature sensor is connected to the first pipeline to detect a current liquid return temperature of the coolant in the first pipeline; a controller, the controller being connected to the liquid outlet temperature sensor, the liquid return temperature sensor, the heater and the cooling device, the controller performing a first adjustment on the cooling device and the heater according to a difference between the current liquid outlet temperature detected by the liquid outlet temperature sensor and a predetermined liquid outlet temperature, or performing a second adjustment on the cooling device and the heater according to a difference between the current liquid return temperature detected by the liquid return temperature sensor and a predetermined liquid return temperature; A liquid storage tank, the liquid storage tank is connected to the first pipeline via a fifth pipeline, the liquid storage tank is used to contain the coolant, an air bag is provided at one end of the liquid storage tank away from the liquid inlet / outlet of the liquid storage tank, the air bag can generate compression deformation according to the increase of the volume of the coolant in the liquid storage tank, and can generate expansion deformation according to the shortage of the coolant in the first pipeline, so as to push the coolant inside the liquid storage tank into the fifth pipeline, and then into the first pipeline; a liquid infusion tube, wherein a liquid outlet end of the liquid infusion tube is connected to the first pipeline, and the coolant can be transported to the first pipeline through the liquid infusion tube; a fluid infusion valve, the fluid infusion valve being connected to the fluid infusion tube to open / close the fluid infusion tube; a liquid replenishment pressure gauge, the liquid replenishment pressure gauge being connected to the liquid replenishment tube and being located between the liquid outlet end of the liquid replenishment tube and the liquid replenishment valve to detect the pressure of the coolant in the liquid replenishment tube; A fluid replenishment pump, the fluid replenishment pump is connected to the liquid inlet end of the fluid replenishment tube to transport the coolant to the fluid replenishment tube; The controller is also connected to the refill valve, the refill pump and the refill pressure gauge. When the controller starts the refill pump and opens the refill valve for refilling, the controller turns off the refill pump and the refill valve according to the pressure of the coolant detected by the refill pressure gauge reaching a predetermined pressure. A liquid level sensor, the liquid level sensor is connected to the liquid storage tank to detect the current liquid level of the coolant in the liquid storage tank; The controller is also connected to the liquid level sensor to start the liquid replenishing pump and open the liquid replenishing valve according to the current liquid level being lower than a predetermined liquid level.

2. The temperature control device according to claim 1, characterized in that: A diameter of the fifth pipeline is smaller than a diameter of the first pipeline.

3. The temperature control device according to claim 1, characterized in that: The temperature control device also includes: an exhaust valve connected to the liquid storage tank and adjacent to a liquid inlet / outlet of the liquid storage tank to exhaust gas in the liquid storage tank; A pressure relief valve is connected to the liquid storage tank and is adjacent to the exhaust valve, so as to discharge the coolant when the pressure of the coolant in the liquid storage tank is greater than the maximum allowable pressure.

4. The temperature control device according to claim 1, characterized in that: The temperature control device also includes: A filter is provided on the fourth pipeline to filter the coolant from the heater.

5. The temperature control device according to claim 4, characterized in that: The material of the housing of the filter is a metal material, and the temperature control device further comprises: A semiconductor refrigeration sheet is connected to the housing, and the semiconductor refrigeration sheet can cool and heat the housing. The controller is also connected to the semiconductor refrigeration chip to issue a first alarm and start the semiconductor refrigeration chip for cooling based on the current liquid outlet temperature being higher than a first predetermined value of the predetermined liquid outlet temperature, or to issue a second alarm and start the semiconductor refrigeration chip for heating based on the current liquid outlet temperature being lower than a second predetermined value of the predetermined liquid outlet temperature.

6. The temperature control device according to claim 1, characterized in that: The controller controls the cooling device and the heater through the other one of the return liquid temperature sensor and the outlet liquid temperature sensor according to the failure of the other one of the return liquid temperature sensor and the outlet liquid temperature sensor. The controller further calculates a temperature difference between the current liquid return temperature and the current liquid outlet temperature, and compensates for the first adjustment according to the temperature difference being greater than a predetermined difference.

7. The temperature control device according to claim 1, characterized in that: The cooling device comprises: A heat exchanger, the heat exchanger comprising a first channel and a second channel, the temperature of the second channel can be transferred to the first channel, and both ends of the first channel are connected to the second pipeline and the third pipeline respectively; A compressor, wherein an air inlet of the compressor is connected to a first end of the second channel of the heat exchanger, the compressor can contain a refrigerant and can compress the refrigerant so that the refrigerant becomes a high-temperature and high-pressure gaseous refrigerant; a microchannel radiator connected to the exhaust port of the compressor to receive the refrigerant from the compressor and dissipate heat for the refrigerant so that the gaseous refrigerant becomes the liquid refrigerant; A fan, the fan facing the microchannel radiator to cool the microchannel radiator; an expansion valve, the expansion valve being connected to the microchannel radiator to receive the refrigerant from the microchannel radiator and converting the liquid refrigerant into the mist refrigerant, the opening of the expansion valve being adjustable, the expansion valve being connected to the second end of the second channel of the heat exchanger to discharge the mist refrigerant into the second channel; The controller is also connected to the expansion valve, and adjusts the refrigeration of the cooling device by adjusting the opening of the expansion valve.

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