Energy storage system, temperature regulation and control method, device, equipment, storage medium and product

Abstract

The invention relates to an energy storage system, a temperature regulation and control method, a temperature regulation and control device, equipment, a storage medium and a product. The energy storage system comprises a battery management system and an energy storage device. The energy storage device comprises a liquid cooling unit and at least one energy storage unit. The liquid cooling unit comprises at least one driving pump. Each energy storage unit corresponds to one driving pump; the battery management system is respectively connected with each driving pump; and the battery management system is used for controlling the flow of the cooling liquid output by the driving pump corresponding to each energy storage unit according to the state information of each energy storage unit so as to regulate and control the temperature of the corresponding energy storage unit. According to the energy storage system, the flexibility of temperature regulation and control on the energy storage unit is improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an energy storage system, a temperature control method, a device, a equipment, a storage medium and a product. Background Art

[0002] With the development of energy storage technology, the scale and capacity of energy storage systems continue to increase. In order to meet greater energy storage needs, in energy storage systems, multiple energy storage units are usually stored in an energy storage device, and a liquid cooling unit is used to control the temperature of the multiple energy storage units in the energy storage device.

[0003] However, the related art has the problem of low flexibility when performing temperature control on multiple energy storage units in an energy storage device. Summary of the invention

[0004] Based on this, it is necessary to provide an energy storage system, temperature control method, device, equipment, storage medium and product to address the above technical problems, so as to improve the flexibility of temperature control of multiple energy storage units in the energy storage device.

[0005] In a first aspect, an embodiment of the present application provides an energy storage system, which includes: a battery management system and an energy storage device; the energy storage device includes a liquid cooling unit and at least one energy storage unit, and the liquid cooling unit includes at least one driving pump; each energy storage unit corresponds to a driving pump; the battery management system is respectively connected to each driving pump;

[0006] The battery management system is used to control the flow rate of coolant output by the drive pump corresponding to each energy storage unit according to the status information of each energy storage unit, so as to regulate the temperature of the corresponding energy storage unit.

[0007] In the energy storage system provided in the embodiment of the present application, the energy storage system includes: a battery management system and an energy storage device; the energy storage device includes a liquid cooling unit and at least one energy storage unit, and the liquid cooling unit includes at least one driving pump; each energy storage unit corresponds to a driving pump; the battery management system is connected to each driving pump respectively; the battery management system controls the flow rate of cooling liquid output by the driving pump corresponding to each energy storage unit according to the status information of each energy storage unit, so as to regulate the temperature of the corresponding energy storage unit. In the system, the battery management system is connected to each driving pump in the liquid cooling unit. The battery management system can control the output flow of each driving pump according to the status information of each energy storage unit, so that the output flow of each driving pump can dynamically change with the status information of the corresponding energy storage unit, thereby improving the flexibility of temperature control of the energy storage unit; and the output flow of each driving pump can be dynamically adjusted according to the actual needs of each energy storage unit, so that the cooling needs of the energy storage unit corresponding to each driving pump are met, so that the temperature of each energy storage unit can be effectively controlled within the required range, thereby improving the life and performance of the energy storage unit; and the output flow of each driving pump is controlled in real time according to demand, which reduces the power consumption of each driving pump, realizes the intelligent use of the driving pump in the liquid cooling unit, and improves the competitiveness of the product.

[0008] In one of the embodiments, the liquid cooling unit further includes a temperature regulating device and at least one stack liquid cooling plate;

[0009] The temperature regulating device, at least one driving pump and at least one stack liquid cooling plate are connected in pairs; each driving pump corresponds to a stack liquid cooling plate; each stack liquid cooling plate is placed in contact with an energy storage unit;

[0010] The temperature regulating device is used to regulate the temperature of the coolant flowing through the temperature regulating device. The coolant in the temperature regulating device is transported to the corresponding liquid cooling plates of the fuel cell stack through each driving pump.

[0011] In the energy storage system provided in the embodiment of the present application, the liquid cooling unit also includes a temperature regulating device and at least one stack liquid cooling plate; the temperature regulating device, at least one driving pump and at least one stack liquid cooling plate are connected to each other, and each driving pump corresponds to a stack liquid cooling plate; each stack liquid cooling plate is placed in contact with an energy storage unit; the temperature regulating device is used to regulate the temperature of the coolant flowing through the temperature regulating device, and the coolant in the temperature regulating device is transported to the corresponding stack liquid cooling plates through each driving pump. In this system, the coolant in the temperature regulating device flows through the pipeline of the stack liquid cooling plate through each driving pump, and each stack liquid cooling plate is placed in contact with an energy storage unit, so that the coolant flowing through the stack liquid cooling plate can adjust the temperature of the corresponding energy storage unit; further, the temperature of the coolant is regulated by the temperature regulating device, thereby improving the efficiency of temperature regulation of each energy storage unit by the coolant.

[0012] In one embodiment, the temperature regulating device includes a first current collecting device, at least one temperature regulating component and a second current collecting device, and the first current collecting device and the second current collecting device each include at least one liquid inlet and at least one liquid outlet; each liquid outlet of the first current collecting device is respectively connected to the liquid inlet of each driving pump, and the liquid outlet of each driving pump is respectively connected to the liquid inlet of the second current collecting device through a stack liquid cooling plate, and each liquid outlet of the second current collecting device is respectively connected to the liquid inlet of the first current collecting device through each temperature regulating component;

[0013] The temperature regulating component is used to regulate the temperature of the coolant that converges from each fuel cell liquid cooling plate to the second current collecting device, so that the temperature of the coolant entering the first current collecting device is within a preset temperature range.

[0014] In the energy storage system provided by the embodiment of the present application, the temperature regulating device includes a first current collecting device, at least one temperature regulating component and a second current collecting device, and the first current collecting device and the second current collecting device each include at least one liquid inlet and at least one liquid outlet; each liquid outlet of the first current collecting device is respectively connected to the liquid inlet of each driving pump, and the liquid outlet of each driving pump is respectively connected to each liquid inlet of the second current collecting device through a stack liquid cooling plate, and each liquid outlet of the second current collecting device is respectively connected to each liquid inlet of the first current collecting device through each temperature regulating component; the temperature regulating component regulates the temperature of the coolant that converges to the second current collecting device from each stack liquid cooling plate, so that the temperature of the coolant entering the first current collecting device is within a preset temperature range. In this system, the temperature of the coolant that converges to the second current collecting device is regulated by the temperature regulating component, so that the temperature of the coolant that enters each stack liquid cooling plate through the first current collecting device and each driving pump is appropriate, and the temperature of the coolant flowing through each stack liquid cooling plate is uniform.

[0015] In one embodiment, the first current collecting device includes a first liquid storage component, a second liquid storage component, and a third liquid storage component connected between the first liquid storage component and the second liquid storage component;

[0016] Each liquid inlet of the first current collecting device is opened in the first liquid storage component; and the liquid outlet of the first current collecting device is opened in the second liquid storage component.

[0017] In the energy storage system provided by the embodiment of the present application, the first current collecting device includes a first liquid storage component, a second liquid storage component, and a third liquid storage component connected between the first liquid storage component and the second liquid storage component; each liquid inlet of the first current collecting device is opened in the first liquid storage component; and the liquid outlet of the first current collecting device is opened in the second liquid storage component. In this system, the coolant in each temperature control component is converged through the first liquid storage component by the first current collecting device, and the temperature is uniformed in the second liquid storage component, and the coolant is transported to each driving pump through the third liquid storage component, so that the temperature of the coolant flowing through the battery stack liquid cold plate corresponding to each driving pump is uniform, thereby improving the accuracy of temperature regulation of each energy storage unit.

[0018] In one embodiment, the first liquid storage component, the second liquid storage component and the third liquid storage component are all constructed as tubular structures, the arrangement area of ​​each liquid inlet of the first current collecting device on the first liquid storage component is defined as a first tube segment, and the arrangement area of ​​each liquid outlet of the first current collecting device on the second liquid storage component is defined as a second tube segment;

[0019] The liquid inlet and the liquid outlet of the third liquid storage component are connected to the liquid outlet of the first liquid storage component and the liquid inlet of the second liquid storage component respectively;

[0020] The liquid outlet of the first liquid storage component is located in the middle of the first pipe section; and / or

[0021] The liquid inlet of the second liquid storage component is located in the middle of the second pipe section.

[0022] In the energy storage system provided in the embodiment of the present application, the first liquid storage component, the second liquid storage component and the third liquid storage component are all constructed as tubular structures, the arrangement area of ​​the liquid inlets of the first current collecting device on the first liquid storage component is defined as the first tube segment, and the arrangement area of ​​the liquid outlets of the first current collecting device on the second liquid storage component is defined as the second tube segment; the liquid inlet and the liquid outlet of the third liquid storage component are respectively connected to the liquid outlet of the first liquid storage component and the liquid inlet of the second liquid storage component; the liquid outlet of the first liquid storage component is located in the middle position of the first tube segment; and / or the liquid inlet of the second liquid storage component is located in the middle position of the second tube segment. In the system, the liquid outlet of the first liquid storage component in the first collecting device is located in the middle of the first pipe segment, and the liquid inlet of the second liquid storage component is located in the middle of the second pipe segment, so that the first collecting device has an I-shaped bus structure, so that the temperature of the coolant delivered to each driving pump is more uniform, thereby improving the stability of temperature regulation of each energy storage unit; and the I-shaped bus structure can improve the transmission efficiency of the coolant, reduce heat loss, and improve energy utilization.

[0023] In one embodiment, the second liquid storage component further includes an openable and closable liquid injection port; the liquid injection port is used to communicate with a cooling liquid supply source.

[0024] In the energy storage system provided in the embodiment of the present application, an openable and closable liquid filling port is provided on the second liquid storage component, and the liquid filling port is connected to a cooling liquid supply source, so as to facilitate the filling of cooling liquid into the liquid cooling unit, ensure that there is sufficient cooling liquid in the liquid cooling unit, and improve the stability of the temperature control of each energy storage unit by the liquid cooling unit.

[0025] In one embodiment, the second current collecting device includes a fourth liquid storage component, and each liquid inlet and each liquid outlet of the second current collecting device are disposed in the fourth liquid storage component.

[0026] In the energy storage system provided in the embodiment of the present application, the second current collecting device includes a fourth liquid storage component, and each liquid inlet and each liquid outlet of the second current collecting device are opened in the fourth liquid storage component. In this system, by arranging the liquid inlet and liquid outlet of the second current collecting device on the fourth liquid storage component, the flow and control of the coolant can be realized. Such a design can make the coolant flow, mix and separate in the second current collecting device, so that the current state of the coolant in the liquid cooling unit can be obtained more accurately, thereby improving the accuracy of temperature control of each energy storage unit.

[0027] In one embodiment, the fourth liquid storage component is configured as a tubular structure;

[0028] The arrangement area of ​​the liquid inlets of the second current collecting device on the fourth liquid storage component is defined as a third pipe segment, and the liquid outlets of the second current collecting device are respectively located on both sides of the length direction of the third pipe segment.

[0029] In the energy storage system provided by the embodiment of the present application, the fourth liquid storage component is constructed as a tubular structure; the arrangement area of ​​each liquid inlet of the second current collecting device on the fourth liquid storage component is defined as the third pipe segment, and each liquid outlet of the second current collecting device is respectively located on both sides of the length direction of the third pipe segment. In this system, by arranging each liquid outlet of the second current collecting device on both sides of the third pipe segment, the uniform distribution of the coolant fluid can be achieved, thereby reducing the local accumulation of the coolant in the pipeline.

[0030] In one embodiment, the temperature regulation assembly includes a cooling assembly;

[0031] A portion of the liquid outlets of the second current collecting device are respectively connected to a portion of the liquid inlets of the first current collecting device through cooling components.

[0032] In the energy storage system provided in the embodiment of the present application, the temperature adjustment component includes a cooling component; a portion of the liquid outlets of the second current collecting device are respectively connected to a portion of the liquid inlet of the first current collecting device through the cooling component. In the system, when the cooling capacity demand of the energy storage unit is too high, the temperature of the coolant in the liquid cooling unit can also be cooled by the cooling component, thereby improving the refrigeration efficiency of the liquid cooling unit.

[0033] In one embodiment, the cooling assembly includes an evaporator, the evaporator includes a first heat exchange channel and a second heat exchange channel, the liquid inlet of the first heat exchange channel is connected to a liquid outlet of the second collector, and the liquid outlet of the first heat exchange channel is connected to a liquid inlet of the first collector;

[0034] The second heat exchange channel is used to exchange heat with the cooling liquid in the first heat exchange channel through the refrigerant flowing inside, so as to cool the temperature of the cooling liquid in the first heat exchange channel.

[0035] In the energy storage system provided in the embodiment of the present application, the cooling component includes an evaporator, the evaporator includes a first heat exchange channel and a second heat exchange channel, the liquid inlet of the first heat exchange channel is connected to a liquid outlet of the second collecting device, and the liquid outlet of the first heat exchange channel is connected to a liquid inlet of the first collecting device; the second heat exchange channel is used to exchange heat with the coolant in the first heat exchange channel through the refrigerant flowing inside, so as to cool the temperature of the coolant in the first heat exchange channel.

[0036] In one embodiment, the cooling component also includes a compressor, a condenser, a liquid storage tank and an expansion valve, the liquid outlet of the second heat exchange channel is connected to the first end of the compressor, the second end of the compressor is connected to the first end of the condenser, the second end of the condenser is connected to the first end of the liquid storage tank, the second end of the liquid storage tank is connected to the first end of the expansion valve, and the second end of the expansion valve is connected to the liquid inlet of the second heat exchange channel.

[0037] In the energy storage system provided in the embodiment of the present application, the cooling component also includes a compressor, a condenser, a liquid storage tank and an expansion valve, the liquid outlet of the second heat exchange channel is connected to the first end of the compressor, the second end of the compressor is connected to the first end of the condenser, the second end of the condenser is connected to the first end of the liquid storage tank, the second end of the liquid storage tank is connected to the first end of the expansion valve, and the second end of the expansion valve is connected to the liquid inlet of the second heat exchange channel. In this system, through the joint cooperation of the compressor, the condenser, the liquid storage tank and the expansion valve, a reliable and efficient refrigeration effect is provided for the cooling component.

[0038] In one embodiment, the temperature adjustment component further includes a heating component that is activated alternatively with the cooling component;

[0039] Another part of the liquid outlets of the second current collecting device are connected to another part of the liquid inlets of the first current collecting device through the heating assembly.

[0040] In the energy storage system provided in the embodiment of the present application, the temperature adjustment component also includes a heating component that is selectively turned on with the cooling component; another part of the liquid outlet of the second current collecting device is connected to another part of the liquid inlet of the first current collecting device through the heating component. In this system, the liquid cooling component includes not only the cooling component but also the heating component. When the energy storage unit has a cooling demand, the cooling component works; when the energy storage unit has a heating demand, the heating component works, so that the cooling or heating demand of the energy storage unit can be fully met, the precise adjustment of the coolant temperature is achieved, and the stability and reliability of the operation of the energy storage unit are improved.

[0041] In one embodiment, another part of the liquid outlet of the second current collecting device is connected to another part of the liquid inlet of the first current collecting device through a heating pipe;

[0042] The heating assembly includes a thermistor, which is attached to the outer wall of the heating pipe.

[0043] In the energy storage system provided in the embodiment of the present application, the heating component includes a thermistor, and another part of the liquid outlet of the second current collecting device is connected to another part of the liquid inlet of the first current collecting device through a heating pipe; the thermistor is attached to the outer wall of the heating pipe. In this system, since the thermistor has a highly efficient heating capacity and can quickly convert electrical energy into thermal energy, the thermistor is directly attached to the outer wall of the heating pipe between the first current collecting device and the second current collecting device, so that the coolant in the heating pipe can be quickly heated, thereby improving the heating efficiency; and the heating power of the thermistor can be adjusted by controlling the current or voltage, thereby realizing flexible control of the coolant heating process.

[0044] In one embodiment, the liquid cooling unit further comprises a liquid cooling unit controller, and the liquid cooling unit controller is respectively connected to each driving pump; the battery management system is connected to the liquid cooling unit controller;

[0045] The battery management system is also used to determine the flow adjustment strategy of each energy storage unit according to the status information of each energy storage unit;

[0046] The liquid cooling unit controller is used to control the flow rate of the coolant output by the driving pump corresponding to each energy storage unit according to each flow adjustment strategy.

[0047] In the energy storage system provided in the embodiment of the present application, the liquid cooling unit also includes a liquid cooling unit controller, which is connected to each drive pump respectively; the battery management system is connected to the liquid cooling unit controller; the battery management system is also used to determine the flow adjustment strategy of each energy storage unit according to the status information of each energy storage unit; the liquid cooling unit controller is used to control the flow rate of the coolant output by the drive pump corresponding to each energy storage unit according to each flow adjustment strategy. In this system, the battery management system can control the output flow rate of each drive pump through the liquid cooling unit controller, so that the temperature of each energy storage unit is within the required range, thereby improving the life and performance of the energy storage unit.

[0048] In a second aspect, an embodiment of the present application further provides a temperature control method, which is applied to an energy storage system, the energy storage system comprising: a battery management system and an energy storage device; the energy storage device comprises a liquid cooling unit and at least one energy storage unit, the liquid cooling unit comprises at least one driving pump; each energy storage unit corresponds to a driving pump, the method comprising:

[0049] Obtaining status information of each energy storage unit in the energy storage device;

[0050] According to the status information of each energy storage unit, the flow rate of the coolant output by the driving pump corresponding to each energy storage unit is controlled to adjust the temperature of the corresponding energy storage unit.

[0051] A temperature control method provided in an embodiment of the present application is applied to an energy storage system, wherein the energy storage system includes: a battery management system and an energy storage device, wherein the energy storage device includes a liquid cooling unit and at least one energy storage unit, and the liquid cooling unit includes at least one drive pump, and each energy storage unit corresponds to a drive pump; status information of each energy storage unit in the energy storage device is obtained, and according to the status information of each energy storage unit, the flow rate of coolant output by the drive pump corresponding to each energy storage unit is controlled to control the temperature of the corresponding energy storage unit. In the method, a battery management system is connected to each driving pump in a liquid cooling unit, so that the battery management system can control the output flow of each driving pump according to the status information of each energy storage unit, so that the output flow of each driving pump can be dynamically changed with the status information of the corresponding energy storage unit, thereby improving the flexibility of temperature control of the energy storage unit; and the output flow of each driving pump can be dynamically adjusted according to the actual demand of each energy storage unit, so that the cooling demand of the energy storage unit corresponding to each driving pump is met, so that the temperature of each energy storage unit can be effectively controlled to be within the demand range, thereby improving the life and performance of the energy storage unit; and the output flow of each driving pump is controlled in real time according to demand, which reduces the power consumption of each driving pump, realizes the intelligent use of the driving pump in the liquid cooling unit, and improves the competitiveness of the product.

[0052] In one embodiment, the state information includes the temperature of each energy storage unit, and according to the state information of each energy storage unit, the flow rate of the coolant output by the driving pump corresponding to each energy storage unit is controlled, including:

[0053] According to the temperature of each energy storage unit, the flow rate of the coolant output by the driving pump corresponding to each energy storage unit is controlled.

[0054] The temperature control method provided in the embodiment of the present application controls the flow rate of the coolant output by the driving pump corresponding to each energy storage unit according to the temperature of each energy storage unit. In this method, since the temperature of each energy storage unit can reflect the actual cooling demand of each energy storage unit, the flow rate of the coolant output by the driving pump corresponding to each energy storage unit is controlled according to the temperature of each energy storage unit, and accurate cooling control of each energy storage unit can be achieved, so that the temperature of each energy storage unit is within the required temperature range, and the life and performance of each energy storage unit are improved.

[0055] In one embodiment, according to the temperature of each energy storage unit, controlling the flow rate of the coolant output by the driving pump corresponding to each energy storage unit includes:

[0056] Determining a first energy storage unit from among the energy storage units according to the temperature of each energy storage unit;

[0057] According to the preset first temperature range and the temperature of the first energy storage unit, the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit is controlled.

[0058] The temperature control method provided in the embodiment of the present application determines the first energy storage unit from the energy storage units according to the temperature of each energy storage unit, and controls the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit according to the preset first temperature range and the temperature of the first energy storage unit. In this method, since the first temperature range is the temperature requirement range of the energy storage unit, the first temperature range is considered when regulating the output flow rate of the driving pump corresponding to the first energy storage unit, thereby improving the accuracy of the output flow rate of the driving pump corresponding to the first energy storage unit, thereby achieving accurate control of the temperature of the first energy storage unit, so that the temperature of the first energy storage unit is within the required temperature range.

[0059] In one embodiment, determining the first energy storage unit from the energy storage units according to the temperature of each energy storage unit includes:

[0060] Obtaining the temperature difference between each adjacent energy storage unit in all energy storage units;

[0061] Adjacent energy storage cells whose temperature difference is greater than a first limit value are determined as first energy storage cells.

[0062] The temperature control method provided in the embodiment of the present application obtains the temperature difference between each adjacent energy storage unit in all energy storage units, and determines the adjacent energy storage unit whose temperature difference is greater than the first boundary value as the first energy storage unit. In this method, since the temperature difference between adjacent energy storage units exceeds a certain temperature difference, the current unevenness may be caused by the uneven temperature. Therefore, the adjacent energy storage unit whose temperature difference is greater than the first boundary value can be determined as the first energy storage unit, so as to subsequently adjust the output flow of the driving pump corresponding to the first energy storage unit.

[0063] In one embodiment, according to a preset first temperature range and a temperature of the first energy storage unit, controlling the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit includes:

[0064] When the temperature of the first energy storage unit is within the first temperature range, controlling the driving pump corresponding to the first energy storage unit to maintain a current output state;

[0065] When the temperature of the first energy storage unit is outside the first temperature range, the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit is adjusted until the temperature difference between the first energy storage unit and an adjacent energy storage unit is less than a second boundary value.

[0066] The temperature control method provided in the embodiment of the present application controls the driving pump corresponding to the first energy storage unit to maintain the current output state when the temperature of the first energy storage unit is within the first temperature range; and adjusts the flow rate of the cooling liquid output by the driving pump corresponding to the first energy storage unit when the temperature of the first energy storage unit is outside the first temperature range until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value. In this method, the output flow rate of the driving pump corresponding to the first energy storage unit is regulated only when the temperature of the first energy storage unit is outside the first temperature range, thereby improving the accuracy of the temperature control of the first energy storage unit.

[0067] In one embodiment, when the temperature of the first energy storage unit is outside the first temperature range, adjusting the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value includes:

[0068] When the temperature of the first energy storage unit is greater than a maximum value of the first temperature range, generating a first flow request;

[0069] A first flow request is sent to a liquid cooling unit controller in the liquid cooling unit; the first flow request is used to instruct the liquid cooling unit controller to increase the flow rate of the coolant output by the drive pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than a second boundary value.

[0070] The temperature control method provided in the embodiment of the present application generates a first flow request when the temperature of the first energy storage unit is greater than the maximum value of the first temperature range; the first flow request is sent to the liquid cooling unit controller in the liquid cooling unit; the first flow request is used to instruct the liquid cooling unit controller to increase the flow rate of the coolant output by the drive pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value. In this method, when the temperature of the first energy storage unit is greater than the maximum value of the first temperature range, it means that the temperature of the first energy storage unit is too high, and at this time, the output flow rate of the drive pump is controlled to increase, thereby realizing the temperature reduction of the first energy storage unit, and improving the precise control of the temperature of the first energy storage unit.

[0071] In one embodiment, when the temperature of the first energy storage unit is outside the first temperature range, adjusting the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value includes:

[0072] generating a second flow request when the temperature of the first energy storage unit is less than a minimum value of the first temperature range;

[0073] A second flow request is sent to a liquid cooling unit controller in the liquid cooling unit, and the second flow request is used to instruct the liquid cooling unit controller to reduce the flow rate of the coolant output by the drive pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than a second boundary value.

[0074] The temperature control method provided in the embodiment of the present application generates a second flow request when the temperature of the first energy storage unit is less than the minimum value of the first temperature range; the second flow request is sent to the liquid cooling unit controller in the liquid cooling unit, and the second flow request is used to instruct the liquid cooling unit controller to reduce the flow rate of the coolant output by the drive pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value. In this method, when the temperature of the first energy storage unit is less than the minimum value of the first temperature range, it means that the temperature of the first energy storage unit is low, and at this time, the output flow rate of the drive pump is controlled to decrease, thereby achieving the temperature increase of the first energy storage unit and improving the precise control of the temperature of the first energy storage unit.

[0075] In one embodiment, according to the temperature of each energy storage unit, controlling the flow rate of the coolant output by the driving pump corresponding to each energy storage unit includes:

[0076] Determine an energy storage unit whose temperature is greater than a preset thermal runaway temperature threshold as a thermal runaway energy storage unit;

[0077] The second energy storage unit is determined according to the thermal runaway energy storage unit, and the flow rate of the coolant output by the driving pump corresponding to the second energy storage unit is controlled.

[0078] The temperature control method provided in the embodiment of the present application determines an energy storage unit whose temperature is greater than a preset thermal runaway temperature threshold as a thermal runaway energy storage unit; determines a second energy storage unit based on the thermal runaway energy storage unit, and controls the flow rate of the coolant output by the drive pump corresponding to the second energy storage unit. In this method, since the second energy storage unit is determined based on the thermal runaway energy storage unit, and the thermal runaway energy storage unit is an energy storage unit whose temperature is greater than the thermal runaway temperature threshold, the output flow rate of the drive pump corresponding to the second energy storage unit is controlled, so that the energy storage unit with temperature control requirements is temperature controlled in a targeted manner, thereby improving the flexibility of temperature control of each energy storage unit.

[0079] In one embodiment, determining a second energy storage unit according to the thermal runaway energy storage unit, and controlling the flow rate of the coolant output by the driving pump corresponding to the second energy storage unit includes:

[0080] Acquire adjacent energy storage units within a preset distance range from the thermal runaway energy storage unit, and determine the thermal runaway energy storage unit and the adjacent energy storage unit as the second energy storage unit;

[0081] The flow rate of the coolant output by the driving pump corresponding to each second energy storage unit is adjusted to the maximum flow rate of the driving pump through the liquid cooling unit controller in the liquid cooling unit.

[0082] The temperature control method provided in the embodiment of the present application obtains adjacent energy storage units within a preset distance range from the thermal runaway energy storage unit, determines the thermal runaway energy storage unit and the adjacent energy storage unit as the second energy storage unit, and adjusts the flow rate of the coolant output by the drive pump corresponding to each second energy storage unit to the maximum flow rate of the drive pump through the liquid cooling unit controller in the liquid cooling unit. In this method, the output flow rate of the drive pump corresponding to the thermal runaway energy storage unit is adjusted to the maximum flow rate, so that the thermal runaway energy storage unit can be cooled with the maximum cooling capacity in a short time, and rapid cooling is achieved; and at the same time, the drive pump corresponding to the adjacent energy storage unit of the thermal runaway energy storage unit is also operated at the maximum flow rate, reducing the risk of heat diffusion of the thermal runaway energy storage unit.

[0083] In one embodiment, according to the temperature of each energy storage unit, controlling the flow rate of the coolant output by the driving pump corresponding to each energy storage unit includes:

[0084] When the temperature of each energy storage unit is within a preset second temperature range, generating a self-circulation instruction;

[0085] The self-circulation instruction is sent to the liquid cooling unit controller in the liquid cooling unit. The self-circulation instruction is used to instruct the liquid cooling unit controller to control the driving pump corresponding to each energy storage unit to output a preset flow of coolant.

[0086] The temperature control method provided in the embodiment of the present application generates a self-circulation instruction when the temperature of each energy storage unit is within a preset second temperature range, and sends the self-circulation instruction to the liquid cooling unit controller in the liquid cooling unit. The self-circulation instruction is used to instruct the liquid cooling unit controller to control the drive pump corresponding to each energy storage unit to output a preset flow of coolant. In this method, when the cooling capacity demand of each energy storage unit is low, the drive pump corresponding to each energy storage unit can be controlled to operate in the self-circulation mode of the liquid cooling unit, that is, each drive pump operates at a preset flow rate, thereby reducing the power consumption of the liquid cooling unit.

[0087] In one embodiment, the state information includes working condition information of the energy storage unit; and according to the state information of each energy storage unit, controlling the flow rate of the coolant output by the driving pump corresponding to each energy storage unit includes:

[0088] For any energy storage unit, the flow rate of the coolant output by the driving pump corresponding to the energy storage unit is controlled according to the operating condition information of the energy storage unit and the preset operating condition threshold.

[0089] The temperature control method provided in the embodiment of the present application controls the flow rate of the coolant output by the drive pump corresponding to the energy storage unit for any energy storage unit according to the working condition information of the energy storage unit and the preset working condition threshold. In this method, since the working condition threshold can reflect the standard working condition of the energy storage unit, the cooling demand of each energy storage unit can be determined according to the working condition information and working condition threshold of each energy storage unit, and then the flow rate of the coolant output by the drive pump corresponding to each energy storage unit can be controlled, so that each energy storage unit can be accurately cooled and the performance and life of the energy storage unit can be improved.

[0090] In one embodiment, according to the working condition information of the energy storage unit and the preset working condition threshold, controlling the flow rate of the coolant output by the driving pump corresponding to the energy storage unit includes:

[0091] When the value of the operating condition information of the energy storage unit is greater than a preset first operating condition threshold, controlling a drive pump corresponding to the energy storage unit to output coolant at a first flow rate;

[0092] When the value of the operating condition information of the energy storage unit is less than a preset second operating condition threshold, controlling the drive pump corresponding to the energy storage unit to output the coolant at a second flow rate;

[0093] Among them, the first operating condition threshold is greater than the second operating condition threshold, and the first flow rate is greater than the second flow rate.

[0094] The temperature control method provided in the embodiment of the present application controls the drive pump corresponding to the energy storage unit to output the coolant at a first flow rate when the value of the working condition information of the energy storage unit is greater than the preset first working condition threshold; controls the drive pump corresponding to the energy storage unit to output the coolant at a second flow rate when the value of the working condition information of the energy storage unit is less than the preset second working condition threshold; wherein the first working condition threshold is greater than the second working condition threshold, and the first flow rate is greater than the second flow rate. In this method, when the energy storage unit is in a high-load cooling capacity demand working condition, the corresponding drive pump can be controlled to operate at a larger output flow rate to fully meet the life and temperature requirements of the energy storage battery in the high-load cooling capacity demand working condition; when the energy storage unit is in a low-load cooling capacity demand working condition, the corresponding drive pump can be controlled to operate at a smaller output flow rate, that is, the drive pump is controlled to operate at a medium-low speed, while achieving the consumption reduction under the low-load cooling capacity demand working condition, reducing the risk of excess cooling capacity, and making the temperature of the energy storage unit within an appropriate temperature range, thereby improving the discharge capacity of the energy storage battery under low working conditions.

[0095] In one embodiment, the operating condition information includes the ambient temperature of the energy storage unit and / or the operating multiple of the energy storage unit.

[0096] In the temperature control method provided in the embodiment of the present application, the working condition information includes the ambient temperature of the energy storage unit and / or the working ratio of the energy storage unit. The flow rate of the coolant output by the corresponding driving pump is controlled according to the ambient temperature and working ratio of the energy storage unit. In this way, the energy storage unit can be accurately cooled and controlled according to the actual needs of the energy storage unit, so that the temperature of the energy storage unit is within a safe working range.

[0097] In one embodiment, the state information further includes the temperature of the energy storage unit. When the value of the operating condition information of the energy storage unit is less than a preset second operating condition threshold, controlling a drive pump corresponding to the energy storage unit to output coolant at a second flow rate includes:

[0098] When the value of the operating condition information of the energy storage unit is less than the second operating condition threshold, generating a pulse width modulation signal of the energy storage unit according to the temperature of the energy storage unit;

[0099] The pulse width modulation signal of the energy storage unit is sent to a liquid cooling unit controller in the liquid cooling unit, and the pulse width modulation signal is used to instruct the liquid cooling unit controller to adjust the drive pump corresponding to the energy storage unit to output the coolant at a second flow rate.

[0100] The temperature control method provided in the embodiment of the present application generates a pulse width modulation signal of the energy storage unit according to the temperature of the energy storage unit when the value of the working condition information of the energy storage unit is less than the second working condition threshold value; the pulse width modulation signal of the energy storage unit is sent to the liquid cooling unit controller in the liquid cooling unit, and the pulse width modulation signal is used to instruct the liquid cooling unit controller to adjust the drive pump corresponding to the energy storage unit to output the coolant at the second flow rate. In this method, the pulse width modulation signal can accurately control the working state of the equipment. Therefore, the pulse width modulation signal generated by the temperature of the energy storage unit controls the output flow of the corresponding drive pump, which can achieve precise control of the drive pump, thereby improving the accuracy of temperature control of the energy storage unit.

[0101] In one embodiment, the state information includes operation information of the energy storage unit, and according to the state information of each energy storage unit, the flow rate of the coolant output by the driving pump corresponding to each energy storage unit is controlled, including:

[0102] According to the operation information of each energy storage unit, determine the energy storage unit in a non-working state among all the energy storage units;

[0103] The driving pump corresponding to the energy storage unit that is in a non-working state is controlled to be in a dormant state.

[0104] The temperature control method provided in the embodiment of the present application determines the energy storage unit in a non-working state among all the energy storage units according to the operation information of each energy storage unit, and controls the drive pump corresponding to the energy storage unit in a non-working state to be in a dormant state. In this method, the temperature of the energy storage unit in a non-working state and the corresponding drive pump do not participate in the thermal management of the energy storage system, which improves the accuracy of temperature control of other energy storage units and reduces the power consumption of the corresponding drive pump.

[0105] In one embodiment, the energy storage unit in a non-operating state includes a failed energy storage unit and / or an energy storage unit that has not been operated for a preset period of time.

[0106] In the temperature control method provided in the embodiment of the present application, the energy storage unit in a non-working state includes a failed energy storage unit and / or an energy storage unit that has not been operated for a preset period of time. By processing the failed energy storage unit and the energy storage unit that has not been operated for a preset period of time offline, the power consumption of the liquid cooling unit is reduced.

[0107] In a third aspect, the present application further provides a temperature control device, which is applied to an energy storage system, the energy storage system comprising: a battery management system and an energy storage device; the energy storage device comprises a liquid cooling unit and at least one energy storage unit, the liquid cooling unit comprises at least one driving pump; each energy storage unit corresponds to a driving pump, the device comprising:

[0108] An information acquisition module, used to obtain status information of each energy storage unit in the energy storage device;

[0109] The flow control module is used to control the flow rate of the coolant output by the driving pump corresponding to each energy storage unit according to the status information of each energy storage unit, so as to adjust the temperature of the corresponding energy storage unit.

[0110] In a fourth aspect, an embodiment of the present application provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of any one of the methods provided in the embodiment of the second aspect are implemented.

[0111] In a fifth aspect, an embodiment of the present application provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of any one of the methods provided in the above-mentioned second aspect embodiment.

[0112] In a sixth aspect, an embodiment of the present application provides a computer program product, including a computer program, which, when executed by a processor, implements the steps of any one of the methods provided in the above-mentioned second aspect embodiments.

[0113] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0114] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0115] Figure 1 is a schematic structural diagram of an energy storage system in one embodiment;

[0116] Figure 2 A schematic diagram of the structure of an energy storage system in another embodiment;

[0117] Figure 3 A schematic diagram of the structure of an energy storage system in another embodiment;

[0118] Figure 4 A schematic diagram of the structure of an energy storage system in another embodiment;

[0119] Figure 5 A schematic diagram of the structure of an energy storage system in another embodiment;

[0120] Figure 6A schematic diagram of the structure of an energy storage system in another embodiment;

[0121] Figure 7 A schematic diagram of the structure of an energy storage system in another embodiment;

[0122] Figure 8 A schematic diagram of the structure of an energy storage system in another embodiment;

[0123] Fig. 9 A schematic diagram of the structure of an energy storage system in another embodiment;

[0124] Fig.10 A schematic diagram of the structure of an energy storage system in another embodiment;

[0125] Fig.11 A schematic diagram of the structure of an energy storage system in another embodiment;

[0126] Fig.12 A schematic diagram of the structure of an energy storage system in another embodiment;

[0127] Fig.13 A schematic diagram of the structure of an energy storage system in another embodiment;

[0128] Fig.14 A schematic diagram of the structure of an energy storage system in another embodiment;

[0129] Fig.15 A schematic diagram of the structure of an energy storage system in another embodiment;

[0130] Fig.16 A schematic diagram of a temperature control method according to an embodiment;

[0131] Fig.17 A schematic diagram of a temperature control method according to another embodiment;

[0132] Fig.18 A schematic diagram of a temperature control method according to another embodiment;

[0133] Fig.19 A schematic diagram of a temperature control method according to another embodiment;

[0134] Fig. 20 A schematic diagram of a temperature control method according to another embodiment;

[0135] Fig.21 A schematic diagram of a temperature control method according to another embodiment;

[0136] Fig. 22 A schematic diagram of a temperature control method according to another embodiment;

[0137] Fig.23A schematic diagram of a temperature control method according to another embodiment;

[0138] Fig.24 A schematic diagram of a temperature control method according to another embodiment;

[0139] Fig.25 A schematic diagram of a temperature control method according to another embodiment;

[0140] Fig.26 A schematic diagram of a temperature control method according to another embodiment;

[0141] Fig. 27 A schematic diagram of a temperature control method according to another embodiment;

[0142] Fig.28 A schematic diagram of a temperature control method according to another embodiment;

[0143] Fig.29 is a structural block diagram of a temperature control device in one embodiment;

[0144] Fig.30 is a structural block diagram of a temperature control device in another embodiment;

[0145] Fig.31 is a structural block diagram of a temperature control device in another embodiment;

[0146] Fig.32 is a structural block diagram of a temperature control device in another embodiment;

[0147] Fig.33 is a structural block diagram of a temperature control device in another embodiment;

[0148] Fig.34 is a structural block diagram of a temperature control device in another embodiment;

[0149] Fig.35 is a structural block diagram of a temperature control device in another embodiment;

[0150] Fig.36 is a structural block diagram of a temperature control device in another embodiment;

[0151] Fig.37 is a structural block diagram of a temperature control device in another embodiment;

[0152] Fig.38 is a structural block diagram of a temperature control device in another embodiment;

[0153] Fig.39 is a structural block diagram of a temperature control device in another embodiment;

[0154] Fig.40 is a structural block diagram of a temperature control device in another embodiment;

[0155] Fig.41 is a structural block diagram of a temperature control device in another embodiment;

[0156] Fig.42 is a structural block diagram of a temperature control device in another embodiment;

[0157] Fig.43 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment.

[0158] The reference numerals in the specific implementation manner are as follows: 1 Energy storage system; 11 Battery management system; 12 Energy storage device; 13 Liquid cooling unit; 14 energy storage unit; 15 driving pump; 21 temperature regulating device; 22 stack liquid cooling plate; 31 first current collecting device; 32 temperature regulating component; 33 second current collecting device; 41 first liquid storage component;

[0159] 42 second liquid storage component; 43 third liquid storage component;

[0160] 44 liquid injection port; 51 first pipe section;

[0161] 52 second pipe section; 61 fourth liquid storage component;

[0162] 62 third pipe section; 71 cooling component;

[0163] 72 heating element; 81 evaporator;

[0164] 82 first heat exchange channel; 83 second heat exchange channel;

[0165] 91 compressor; 92 condenser;

[0166] 93 liquid storage tank; 94 expansion valve;

[0167] 101 thermistor; 102 heating pipe;

[0168] 121 liquid cooling unit controller; 151 pressure sensor;

[0169] 152 temperature sensor; 153 fan. DETAILED DESCRIPTION

[0170] The following embodiments of the technical solution of the present application will be described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0171] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the present application; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" in the specification and claims of the present application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions. In the description of the embodiments of the present application, the technical terms "first" and "second" are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined. The reference to "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0172] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0173] In the description of the embodiments of the present application, the term "plurality" refers to more than two (including two).

[0174] In the description of the embodiments of the present application, the orientation or position relationship indicated by the technical terms "middle", "length", "upper" and "lower" is based on the orientation or position relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0175] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "connection" and "attachment" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0176] At present, with the development of science and technology, the application of large-scale energy storage systems is becoming more and more extensive. Among them, the energy storage system includes multiple energy storage units. For example, if the energy storage system is a container and the energy storage unit is a battery cabinet, a liquid cooling unit can be set in the container to achieve temperature control of the battery cabinet in the container through the liquid cooling unit.

[0177] In the related art, the temperature of each battery cabinet in the container is adjusted respectively by the coolant flowing in the pipelines of multiple battery stack liquid cooling plates in the liquid cooling unit. However, the liquid cooling unit in the related art has the problem of poor flexibility when adjusting the temperature of each battery cabinet.

[0178] Based on the above considerations, in order to improve the flexibility of the liquid cooling unit in the energy storage system in regulating the temperature of each energy storage unit, an embodiment of the present application provides an energy storage system, which includes a battery management system and an energy storage device, the energy storage device includes at least one energy storage unit and a liquid cooling unit, the liquid cooling unit includes at least one drive pump, and each energy storage unit corresponds to a drive pump; the battery management system is connected to each drive pump respectively; the battery management system controls the flow rate of coolant output by the drive pump corresponding to each energy storage unit according to the status information of each energy storage unit, so as to regulate the temperature of the corresponding energy storage unit through the coolant output by each drive pump.

[0179] In such an energy storage system, since each driving pump corresponds to an energy storage unit and each driving pump is a variable speed water pump, the status information of each energy storage unit can be obtained through the battery management system, and then the speed of the water pump corresponding to the energy storage unit can be adjusted according to the status information of each energy storage unit to control the flow rate of coolant output by the driving pump corresponding to each energy storage unit, thereby realizing active regulation of the temperature of each energy storage unit, matching different temperature control requirements to the energy storage unit according to different states, and improving the flexibility of temperature control of the energy storage unit.

[0180] Of course, it should be understood that the effects that can be achieved by the energy storage system provided in the embodiment of the present application are not limited to this, and other technical effects can also be achieved. For example, the flow rate of the coolant output by the driving pump of the liquid cooling unit in the embodiment of the present application can be adjusted according to the status information of the energy storage unit, thereby reducing the power consumption of the driving pump and improving the intelligence of the temperature control of the liquid cooling unit.

[0181] In one embodiment, an energy storage system is provided, such as Figure 1 As shown, the energy storage system 1 includes: a battery management system 11 and an energy storage device 12; the energy storage device 12 includes a liquid cooling unit 13 and at least one energy storage unit 14, and the liquid cooling unit 13 includes at least one driving pump 15; each energy storage unit 14 corresponds to a driving pump 15; the battery management system 11 is respectively connected to each driving pump 15.

[0182] The battery management system 11 is used to control the flow rate of the coolant output by the driving pump 15 corresponding to each energy storage unit 14 according to the status information of each energy storage unit 14 , so as to adjust the temperature of the corresponding energy storage unit 14 .

[0183] Among them, the liquid cooling unit is a device that realizes cooling or heating by circulating coolant in the pipeline. A driving pump is arranged in the liquid cooling unit, and the driving pump can be used to drive the coolant in the pipeline of the liquid cooling unit to flow through the energy storage unit, so as to adjust the temperature of the energy storage unit by the coolant; optionally, the driving pump can be a variable speed water pump, and the coolant can be pure water, water mixture, etc.

[0184] The energy storage device can be an electrical cabinet container. Correspondingly, the energy storage unit in the energy storage device can be an electrical cabinet, a battery, etc. The energy storage device includes at least one energy storage unit. Each energy storage unit corresponds to a drive pump, that is, the liquid cooling pipeline where each drive pump is located can control the temperature of the corresponding energy storage unit. Figure 1 , Figure 1 The schematic diagram shows that the energy storage device includes three energy storage units and the liquid cooling unit includes three driving pumps, and each driving pump is connected in parallel.

[0185] Optionally, the energy storage unit may be within a preset distance of the pipeline at the output end of the driving pump, so that when the temperature of each energy storage unit needs to be regulated, the flow rate of the coolant output by the driving pump corresponding to each energy storage unit can be controlled to correspondingly regulate the temperature of each energy storage unit. Figure 1 The number of energy storage units and driving pumps in the embodiment is only an example and is not limited thereto in the embodiments of the present application; optionally, the number of driving pumps may be greater than or equal to the number of energy storage units.

[0186] Among them, the battery management system (BMS) is a system for monitoring energy storage units. The battery management system may include a main control terminal and a collection module. The collection module may collect the status information of each energy storage unit in the energy storage device in real time, and send the status information of each energy storage unit to the main control terminal. The main control terminal analyzes the status information, determines the flow rate of the coolant output by the drive pump corresponding to each energy storage unit, and then controls each water pump to work at the corresponding flow rate.

[0187] Optionally, a status sensor may be respectively arranged at a preset distance from each energy storage unit of the energy storage device, and the status information of each energy storage unit is collected by the status sensor. The status sensor sends the collected status information to the battery management system. The battery management system determines the flow rate of coolant output by the driving pump corresponding to each energy storage unit based on the received status information of each energy storage unit, and then controls each water pump to work at the corresponding flow rate.

[0188] In an optional embodiment, the flow rate of coolant output by the drive pump corresponding to each energy storage unit can be determined according to a preset analysis model; specifically, the status information of each energy storage unit is input into the analysis model, the status information of each energy storage unit is analyzed by the analysis model, the rotation speed of the drive pump corresponding to each energy storage unit is determined, and the flow rate of coolant output by each drive pump is controlled by controlling the rotation speed of each drive pump.

[0189] The status information may represent the working status information of the energy storage unit, wherein the status information may include temperature, working status, health status, capacity status, etc.

[0190] In the energy storage system provided by the embodiment of the present application, the energy storage system includes: a battery management system and an energy storage device; the energy storage device includes a liquid cooling unit and at least one energy storage unit, and the liquid cooling unit includes at least one driving pump; each energy storage unit corresponds to a driving pump; the battery management system is connected to each driving pump respectively; the battery management system controls the flow rate of cooling liquid output by the driving pump corresponding to each energy storage unit according to the status information of each energy storage unit to adjust the temperature of the corresponding energy storage unit. In this system, the battery management system is connected to each driving pump in the liquid cooling unit, and the battery management system can control the output flow rate of each driving pump according to the status information of each energy storage unit, so that the output flow rate of each driving pump can change dynamically with the status information of the corresponding energy storage unit, matching the different temperature control requirements of each energy storage unit, and improving the flexibility of temperature control of the energy storage unit; and the output flow rate of each driving pump can be dynamically adjusted according to the actual needs of each energy storage unit, reducing the power consumption of each driving pump, realizing the intelligent use of the driving pump in the liquid cooling unit, thereby improving the competitiveness of the product.

[0191] In one embodiment, Figure 2As shown, the liquid cooling unit 13 also includes a temperature regulating device 21 and at least one stack liquid cooling plate 22; the temperature regulating device 21, at least one driving pump 15 and at least one stack liquid cooling plate 22 are connected in pairs; each driving pump 15 corresponds to a stack liquid cooling plate 22; each stack liquid cooling plate 22 is placed in contact with an energy storage unit 14; the temperature regulating device 21 is used to regulate the temperature of the coolant flowing through the temperature regulating device 21, and the coolant in the temperature regulating device 21 is transported to the corresponding stack liquid cooling plates 22 through each driving pump 15.

[0192] Among them, the temperature regulating device, the driving pump and the stack liquid cooling plate are connected to each other. The temperature regulating device can adjust the temperature of the coolant flowing through the temperature regulating device, and control the coolant in the temperature regulating device to be transported to each stack liquid cooling plate corresponding to each driving pump through each driving pump; since each stack liquid cooling plate is placed in contact with an energy storage unit, the coolant flowing through the stack liquid cooling plate through each driving pump can adjust the temperature of each energy storage unit.

[0193] Furthermore, the battery management system controls the flow rate of coolant output by the drive pump corresponding to each energy storage unit through the status information of each energy storage unit, and dynamically adjusts the temperature of each energy storage unit in a targeted manner.

[0194] Optionally, the temperature regulating device may regulate the temperature of the coolant by heating the coolant or cooling the coolant. It is understandable that in actual applications, the temperature of the coolant is specifically regulated according to specific circumstances.

[0195] exist Figure 2 In the embodiment, three groups of driving pumps and fuel cell stack liquid cooling plates are included, wherein each group includes a driving pump and a fuel cell stack liquid cooling plate connected to the driving pump, and each group of driving pumps and fuel cell stack liquid cooling plates are arranged in parallel.

[0196] In the energy storage system provided in the embodiment of the present application, the liquid cooling unit also includes a temperature regulating device and at least one stack liquid cooling plate; the temperature regulating device, at least one driving pump and at least one stack liquid cooling plate are connected to each other, and each driving pump corresponds to a stack liquid cooling plate; each stack liquid cooling plate is placed in contact with an energy storage unit; the temperature regulating device is used to regulate the temperature of the coolant flowing through the temperature regulating device, and the coolant in the temperature regulating device is transported to the corresponding stack liquid cooling plates through each driving pump. In this system, the coolant in the temperature regulating device flows through the pipeline of the stack liquid cooling plate through each driving pump, and each stack liquid cooling plate is placed in contact with an energy storage unit, so that the coolant flowing through the stack liquid cooling plate can adjust the temperature of the corresponding energy storage unit; further, the temperature of the coolant is regulated by the temperature regulating device, thereby improving the efficiency of temperature regulation of each energy storage unit by the coolant.

[0197] In one embodiment, Figure 3 As shown, the temperature regulating device 21 includes a first collecting device 31, at least one temperature regulating component 32 and a second collecting device 33. The first collecting device 31 and the second collecting device 33 each include at least one liquid inlet and at least one liquid outlet; the liquid outlets of the first collecting device 31 are respectively connected to the liquid inlets of the driving pumps 15, the liquid outlets of the driving pumps 15 are respectively connected to the liquid inlets of the second collecting device 33 through a stack liquid cooling plate 22, and the liquid outlets of the second collecting device 33 are respectively connected to the liquid inlets of the first collecting device 31 through the temperature regulating components 32.

[0198] The temperature regulating assembly 32 is used to regulate the temperature of the coolant that converges from each stack liquid cooling plate 22 to the second current collecting device 33, so that the temperature of the coolant entering the first current collecting device 31 is within a preset temperature range.

[0199] in, Figure 3 The schematic diagram is a structural diagram of a liquid cooling unit including 5 stack liquid cooling plates and 4 temperature adjustment components as an example, the first current collecting device includes 4 liquid inlets and 5 liquid outlets, and the second current collecting device includes 5 liquid inlets and 4 liquid outlets. Optionally, the number of stack liquid cooling plates can be set according to actual needs, and the number of liquid inlets and liquid outlets in the first current collecting device and the second current collecting device can be determined according to the number of stack liquid cooling plates.

[0200] Among them, the coolant in the first collector is transported to the stack liquid cooling plate through each driving pump, and each stack liquid cooling plate adjusts the temperature of each energy storage unit through the coolant in the pipeline and then transports it to the second collector. Then the coolant in the second collector passes through the temperature control component and is transported to the first collector. In this way, the coolant circulates in the liquid cooling unit pipeline. The first collector converges the coolant in each temperature control component so that the temperature of the coolant flowing through each stack liquid cooling plate through each driving pump is uniform; the second collector can converge the coolant after flowing through each stack liquid cooling plate, and adjust the temperature of the coolant through each temperature control component so that the temperature of the coolant entering the first collector is within the preset temperature range.

[0201] In addition, the status information of each energy storage unit is used to control the flow rate of coolant delivered to the liquid cooling plate of the fuel cell stack by each driving pump, so that the liquid cooling unit can match the different cooling or heating requirements of each energy storage unit, ensuring that each energy storage unit operates at the optimal temperature, thereby improving the safety, reliability and life of each energy storage unit.

[0202] In the energy storage system provided by the embodiment of the present application, the temperature regulating device includes a first current collecting device, at least one temperature regulating component and a second current collecting device, and the first current collecting device and the second current collecting device each include at least one liquid inlet and at least one liquid outlet; each liquid outlet of the first current collecting device is respectively connected to the liquid inlet of each driving pump, and the liquid outlet of each driving pump is respectively connected to each liquid inlet of the second current collecting device through a stack liquid cooling plate, and each liquid outlet of the second current collecting device is respectively connected to each liquid inlet of the first current collecting device through each temperature regulating component; the temperature regulating component regulates the temperature of the coolant that converges to the second current collecting device from each stack liquid cooling plate, so that the temperature of the coolant entering the first current collecting device is within a preset temperature range. In this system, the temperature of the coolant that converges to the second current collecting device is regulated by the temperature regulating component, so that the temperature of the coolant that enters each stack liquid cooling plate through the first current collecting device and each driving pump is appropriate, and the temperature of the coolant flowing through each stack liquid cooling plate is uniform.

[0203] In one embodiment, Figure 4 As shown, the first collecting device 31 includes a first liquid storage component 41, a second liquid storage component 42 and a third liquid storage component 43 connected between the first liquid storage component 41 and the second liquid storage component 42; each liquid inlet of the first collecting device 31 is opened in the first liquid storage component 41; the liquid outlet of the first collecting device 31 is opened in the second liquid storage component 42.

[0204] The liquid storage component can be used to store and transport liquid. Therefore, in order to make the temperature of all the coolants that converge to the first collector from each temperature adjustment component uniform, the first collector can be set as a busbar structure. Specifically, the first collector includes a first liquid storage component, a second liquid storage component, and a third liquid storage component that is connected to the first liquid storage component and the second liquid storage component; each liquid inlet of the first collector is opened in the first liquid storage component, and each liquid outlet of the first collector is opened in the second liquid storage component.

[0205] In this way, the coolant in each temperature regulating component flows through the liquid inlet of the first liquid storage component through the third liquid storage component, converges in the third liquid storage component to make the temperature of each coolant uniform, and then passes through the liquid outlets of the second liquid storage component through each driving pump to transport the coolant to each fuel cell stack liquid cooling plate.

[0206] Optionally, in one embodiment, please continue to refer to Figure 4 The second liquid storage component 42 also includes an openable and closable liquid injection port 44; the liquid injection port 44 is used to communicate with a cooling liquid supply source.

[0207] Among them, if the cooling liquid supply source can be a liquid storage device that provides cooling liquid for the liquid cooling unit; for example, if the cooling liquid is water, the cooling liquid supply source can be a water storage tank.

[0208] The cooling liquid supply source is connected to the first collecting device through the liquid injection port of the second liquid storage component. When the liquid cooling unit needs to be filled with cooling liquid, the cooling liquid can be added to the first collecting device through the cooling liquid supply source by opening the liquid injection port.

[0209] In the energy storage system provided in the embodiment of the present application, an openable and closable liquid filling port is provided on the second liquid storage component, and the liquid filling port is connected to a cooling liquid supply source, so as to facilitate the filling of cooling liquid into the liquid cooling unit, ensure that there is sufficient cooling liquid in the liquid cooling unit, and improve the stability of the temperature control of each energy storage unit by the liquid cooling unit.

[0210] In the energy storage system provided by the embodiment of the present application, the first current collecting device includes a first liquid storage component, a second liquid storage component, and a third liquid storage component connected between the first liquid storage component and the second liquid storage component; each liquid inlet of the first current collecting device is opened in the first liquid storage component; and the liquid outlet of the first current collecting device is opened in the second liquid storage component. In this system, the coolant in each temperature control component is converged through the first liquid storage component by the first current collecting device, and the temperature is uniformed in the second liquid storage component, and the coolant is transported to each driving pump through the third liquid storage component, so that the temperature of the coolant flowing through the battery stack liquid cold plate corresponding to each driving pump is uniform, thereby improving the accuracy of temperature regulation of each energy storage unit.

[0211] In one embodiment, Figure 5 As shown, the first liquid storage component 41, the second liquid storage component 42 and the third liquid storage component 43 are all constructed as tubular structures, and the arrangement area of ​​the liquid inlets of the first collecting device 31 on the first liquid storage component 41 is defined as the first tube segment 51, and the arrangement area of ​​the liquid outlets of the first collecting device 31 on the second liquid storage component 42 is defined as the second tube segment 52; the liquid inlet and the liquid outlet of the third liquid storage component 43 are respectively connected to the liquid outlet of the first liquid storage component 41 and the liquid inlet of the second liquid storage component 42; the liquid outlet of the first liquid storage component 41 is located in the middle position of the first tube segment 51; and / or the liquid inlet of the second liquid storage component 42 is located in the middle position of the second tube segment 52.

[0212] Among them, the arrangement area between the liquid inlets of the first current collecting device is used as the first pipe section, and the liquid outlet of the first liquid storage component is located in the middle of the first pipe section; the arrangement area between the liquid outlets of the first current collecting device is used as the second pipe section, and the liquid inlet of the second liquid storage component is located in the middle of the second pipe section, that is, the middle of the first liquid storage component and the middle of the second liquid storage component are connected through the third liquid storage component. In this way, the first current collecting device presents an I-shaped flow collection and distribution row structure.

[0213] In the energy storage system provided in the embodiment of the present application, the first liquid storage component, the second liquid storage component and the third liquid storage component are all constructed as tubular structures, the arrangement area of ​​the liquid inlets of the first current collecting device on the first liquid storage component is defined as the first tube segment, and the arrangement area of ​​the liquid outlets of the first current collecting device on the second liquid storage component is defined as the second tube segment; the liquid inlet and the liquid outlet of the third liquid storage component are respectively connected to the liquid outlet of the first liquid storage component and the liquid inlet of the second liquid storage component; the liquid outlet of the first liquid storage component is located in the middle position of the first tube segment; and / or the liquid inlet of the second liquid storage component is located in the middle position of the second tube segment. In the system, the liquid outlet of the first liquid storage component in the first collecting device is located in the middle of the first pipe segment, and the liquid inlet of the second liquid storage component is located in the middle of the second pipe segment, so that the first collecting device has an I-shaped bus structure, so that the temperature of the coolant delivered to each driving pump is more uniform, thereby improving the stability of temperature regulation of each energy storage unit; and the I-shaped bus structure can improve the transmission efficiency of the coolant, reduce heat loss, and improve energy utilization.

[0214] In one embodiment, Figure 6 As shown, the second current collecting device 33 includes a fourth liquid storage component 61 , and each liquid inlet and each liquid outlet of the second current collecting device 33 are opened in the fourth liquid storage component 61 .

[0215] Among them, the fourth liquid storage component 61 is constructed as a tubular structure; the arrangement area of ​​each liquid inlet of the second collecting device 33 on the fourth liquid storage component 61 is defined as the third pipe segment 62, and each liquid outlet of the second collecting device 33 is respectively located on both sides of the length direction of the third pipe segment 62.

[0216] Continue to see Figure 6 The arrangement area of ​​each liquid inlet of the second collecting device is used as the third pipe segment, and each liquid outlet of the second collecting device can be arranged on both sides of the length direction of the third pipe segment; each liquid outlet of the second collecting device is respectively connected to each temperature adjustment component.

[0217] In the energy storage system provided by the embodiment of the present application, the fourth liquid storage component is constructed as a tubular structure; the arrangement area of ​​each liquid inlet of the second current collecting device on the fourth liquid storage component is defined as the third pipe segment, and each liquid outlet of the second current collecting device is respectively located on both sides of the length direction of the third pipe segment. In this system, by arranging each liquid outlet of the second current collecting device on both sides of the third pipe segment, the uniform distribution of the coolant fluid can be achieved, thereby reducing the local accumulation of the coolant in the pipeline.

[0218] In the energy storage system provided in the embodiment of the present application, the second current collecting device includes a fourth liquid storage component, and each liquid inlet and each liquid outlet of the second current collecting device are opened in the fourth liquid storage component. In this system, by arranging the liquid inlet and liquid outlet of the second current collecting device on the fourth liquid storage component, the flow and control of the coolant can be realized. Such a design can make the coolant flow, mix and separate in the second current collecting device, so that the current state of the coolant in the liquid cooling unit can be obtained more accurately, thereby improving the accuracy of temperature control of each energy storage unit.

[0219] In one embodiment, Figure 7 As shown, the temperature adjustment component 32 includes a cooling component 71; a portion of the liquid outlets of the second current collecting device 33 are respectively connected to a portion of the liquid inlets of the first current collecting device 31 through the cooling component 71. Optionally, the temperature adjustment component 32 also includes a heating component 72 that is selectively turned on or off with the cooling component 71; another portion of the liquid outlets of the second current collecting device 33 are connected to another portion of the liquid inlets of the first current collecting device 31 through the heating component 72.

[0220] The temperature regulating component may include a cooling component and / or a heating component.

[0221] It should be noted that Figure 7 The figure is a schematic diagram of the structure of a liquid cooling unit including two cooling components and two heating components. It should be noted that the number of cooling components and heating components in the embodiment of the present application is only for illustration. In actual application, the number of cooling components and heating components in the liquid cooling unit can be determined according to actual needs.

[0222] In the case where the temperature adjustment component is a cooling component, the description is made with one cooling component, one liquid outlet of the second current collecting device is connected to the liquid inlet of the cooling component, and the liquid outlet of the cooling component is connected to the liquid inlet of the first current collecting device. Correspondingly, in the case where the temperature adjustment component is a heating component, the description is made with one heating component, one liquid outlet of the second current collecting device is connected to the liquid inlet of the heating component, and the liquid outlet of the heating component is connected to the liquid inlet of the first current collecting device.

[0223] It should be noted that the working states of the cooling components and the heating components are mutually exclusive. For example, when each heating component is working, each cooling component is not working; when each cooling component is working, each heating component is not working. The working conditions of each cooling component and each heating component can be determined according to actual needs, and the embodiments of the present application are not limited here.

[0224] In the energy storage system provided in the embodiment of the present application, the temperature adjustment component also includes a heating component that is selectively turned on with the cooling component; another part of the liquid outlet of the second current collecting device is connected to another part of the liquid inlet of the first current collecting device through the heating component. In this system, the liquid cooling component includes not only the cooling component but also the heating component. When the energy storage unit has a cooling demand, the cooling component works; when the energy storage unit has a heating demand, the heating component works, so that the cooling or heating demand of the energy storage unit can be fully met, the precise adjustment of the coolant temperature is achieved, and the stability and reliability of the operation of the energy storage unit are improved.

[0225] In the energy storage system provided in the embodiment of the present application, the temperature adjustment component includes a cooling component; a portion of the liquid outlets of the second current collecting device are respectively connected to a portion of the liquid inlet of the first current collecting device through the cooling component. In the system, when the cooling capacity demand of the energy storage unit is too high, the temperature of the coolant in the liquid cooling unit can also be cooled by the cooling component, thereby improving the refrigeration efficiency of the liquid cooling unit.

[0226] In one embodiment, Figure 8 As shown, the cooling assembly 71 includes an evaporator 81, and the evaporator 81 includes a first heat exchange channel 82 and a second heat exchange channel 83. The liquid inlet of the first heat exchange channel 82 is connected to a liquid outlet of the second collecting device 33, and the liquid outlet of the first heat exchange channel 82 is connected to a liquid inlet of the first collecting device 31; the second heat exchange channel 83 is used to exchange heat with the cooling liquid in the first heat exchange channel 82 through the refrigerant flowing inside, so as to cool the temperature of the cooling liquid in the first heat exchange channel 82.

[0227] The evaporator includes a first heat exchange channel and a second heat exchange channel, wherein the first heat exchange channel may be a channel for the flow of coolant, and the second heat exchange channel may be a channel for the flow of refrigerant. The first heat exchange channel may be a hot medium channel, and the second heat exchange channel may be a cold medium channel. The first heat exchange channel and the second heat exchange channel transfer heat through the heat exchange surface inside the evaporator to achieve heat exchange between the hot medium and the cold medium.

[0228] That is, the coolant in the first heat exchange channel can be a hot medium, and the coolant in the second heat exchange channel can be a cold medium; the second heat exchange channel exchanges heat with the coolant in the first heat exchange channel through the coolant flowing inside to cool the temperature of the coolant in the first heat exchange channel.

[0229] In the energy storage system provided in the embodiment of the present application, the cooling component includes an evaporator, the evaporator includes a first heat exchange channel and a second heat exchange channel, the liquid inlet of the first heat exchange channel is connected to a liquid outlet of the second collecting device, and the liquid outlet of the first heat exchange channel is connected to a liquid inlet of the first collecting device; the second heat exchange channel is used to exchange heat with the coolant in the first heat exchange channel through the refrigerant flowing inside, so as to cool the temperature of the coolant in the first heat exchange channel.

[0230] In one embodiment, Fig. 9 As shown, the cooling component 71 also includes a compressor 91, a condenser 92, a liquid storage tank 93 and an expansion valve 94. The liquid outlet of the second heat exchange channel 83 is connected to the first end of the compressor 91, the second end of the compressor 91 is connected to the first end of the condenser 92, the second end of the condenser 92 is connected to the first end of the liquid storage tank 93, the second end of the liquid storage tank 93 is connected to the first end of the expansion valve 94, and the second end of the expansion valve 94 is connected to the liquid inlet of the second heat exchange channel 83.

[0231] Among them, the compressor can suck in low-pressure and low-temperature refrigerant gas, and compress it into high-pressure and high-temperature gas by increasing the pressure and temperature of the refrigerant gas. Such a compression process can enable the refrigerant to release more heat.

[0232] The condenser can receive high-pressure and high-temperature refrigerant gas from the compressor and cool it into high-pressure liquid by heat dissipation. During the condensation process, the heat released by the refrigerant will be transferred to the external environment, causing the temperature of the refrigerant to drop. Optionally, a fan can be set outside the condenser, which can provide a cold source to the condenser and blow air to cool the condenser.

[0233] The liquid storage tank is a component for storing and regulating refrigeration. The liquid storage tank is located between the condenser and the expansion valve. It is used to store high-pressure liquid refrigerant and balance the pressure and flow in the cooling component. The liquid storage tank can also provide refrigerant replenishment and stabilize the operation of the cooling component.

[0234] The expansion valve is arranged between the liquid storage tank and the evaporator to adjust the flow rate and pressure of the refrigerant. The expansion valve restricts the flow of the refrigerant, causing it to expand in the evaporator, thereby reducing the temperature and pressure of the refrigerant; the expansion valve can accurately control the flow rate and pressure of the refrigerant to achieve precise temperature control. Such an expansion process enables the refrigerant to absorb the heat of the coolant in the first heat exchange channel to achieve a cooling effect. Optionally, the expansion valve can be a thermal expansion valve.

[0235] In the energy storage system provided in the embodiment of the present application, the cooling component also includes a compressor, a condenser, a liquid storage tank and an expansion valve, the liquid outlet of the second heat exchange channel is connected to the first end of the compressor, the second end of the compressor is connected to the first end of the condenser, the second end of the condenser is connected to the first end of the liquid storage tank, the second end of the liquid storage tank is connected to the first end of the expansion valve, and the second end of the expansion valve is connected to the liquid inlet of the second heat exchange channel. In this system, through the joint cooperation of the compressor, the condenser, the liquid storage tank and the expansion valve, a reliable and efficient refrigeration effect is provided for the cooling component.

[0236] In one embodiment, Fig.10 As shown, the heating assembly 72 includes a thermistor 101 , and another portion of the liquid outlet of the second current collecting device 33 is connected to another portion of the liquid inlet of the first current collecting device 31 through a heating pipe 102 ; the thermistor 101 is attached to the outer wall of the heating pipe 102 .

[0237] Among them, another part of the liquid outlet of the second collecting device is connected to another part of the liquid inlet of the first collecting device through a heating pipe, and the thermistor can be attached to the outer wall of the heating pipe to heat the coolant flowing through the heating pipe.

[0238] Optionally, the thermistor can be connected to a power source in the liquid cooling unit, and the cooling liquid inside the heating pipe is electrically heated by the thermistor connected to the power source. The heating pipe can be a tubular structure.

[0239] In an optional embodiment, the liquid cooling unit may include a plurality of thermistors, and each thermistor may be connected in parallel or in series at the liquid outlet of the second current collecting device and the liquid inlet of the first current collecting device. Fig.10 The schematic diagram of the structure of two thermistors in parallel in the liquid cooling unit. Fig.11 As shown, Fig.11 It is a schematic diagram of the structure of two thermistors connected in series, that is, two thermistors are attached to a heating pipe.

[0240] In the energy storage system provided in the embodiment of the present application, the heating component includes a thermistor, and another part of the liquid outlet of the second current collecting device is connected to another part of the liquid inlet of the first current collecting device through a heating pipe; the thermistor is attached to the outer wall of the heating pipe. In this system, since the thermistor has a highly efficient heating capacity and can quickly convert electrical energy into thermal energy, the thermistor is directly attached to the outer wall of the heating pipe between the first current collecting device and the second current collecting device, so that the coolant in the heating pipe can be quickly heated, thereby improving the heating efficiency; and the heating power of the thermistor can be adjusted by controlling the current or voltage, thereby realizing flexible control of the coolant heating process.

[0241] In one embodiment, Fig.12As shown, the liquid cooling unit 13 further includes a liquid cooling unit controller 121 , and the liquid cooling unit controller 121 is respectively connected to each driving pump 15 ; the battery management system 11 is connected to the liquid cooling unit controller 121 .

[0242] The battery management system 11 is also used to determine the flow adjustment strategy of each energy storage unit 14 according to the status information of each energy storage unit 14; the liquid cooling unit controller 121 is used to control the flow rate of the coolant output by the drive pump 15 corresponding to each energy storage unit according to each flow adjustment strategy.

[0243] The liquid cooling unit controller can control the working state of the liquid cooling unit, including the working state of the temperature regulating component and the driving pump in the liquid cooling unit.

[0244] Therefore, the battery management system can determine the flow adjustment strategy of each energy storage unit according to the status information of each energy storage unit, and then send the flow adjustment strategy of each energy storage unit to the liquid cooling unit controller, and control the flow rate of coolant output by each drive pump through the liquid cooling unit controller.

[0245] Optionally, the flow adjustment strategy of each energy storage unit can be determined according to a preset strategy determination model; specifically, the battery management system inputs the status information of each energy storage unit into the strategy determination model, analyzes the status information of each energy storage unit through the strategy determination model, and determines the flow adjustment strategy of each energy storage unit; wherein, the flow adjustment strategy of each energy storage unit is essentially the flow adjustment strategy of each drive pump corresponding to each energy storage unit, and the flow adjustment strategy is used to control the flow rate of coolant output by the corresponding drive pump.

[0246] In the energy storage system provided in the embodiment of the present application, the liquid cooling unit also includes a liquid cooling unit controller, which is connected to each drive pump respectively; the battery management system is connected to the liquid cooling unit controller; the battery management system is also used to determine the flow adjustment strategy of each energy storage unit according to the status information of each energy storage unit; the liquid cooling unit controller is used to control the flow rate of the coolant output by the drive pump corresponding to each energy storage unit according to each flow adjustment strategy. In this system, the battery management system can control the output flow rate of each drive pump through the liquid cooling unit controller, so that the temperature of each energy storage unit is within the required range, thereby improving the life and performance of the energy storage unit.

[0247] In one embodiment, a schematic diagram of the structure of a temperature regulating device is given below. Fig.13 As shown, in Fig.13It includes a second collecting device 33, a cooling component 71, a first collecting device 31 and a driving pump 15. The second collecting device 33 is connected to the liquid inlets of the two cooling components through two liquid outlets, respectively. The liquid outlets of the two cooling components are connected to the two liquid inlets of the first collecting device 31, respectively. The first collecting device 31 is an I-shaped structure, and is connected to the five driving pumps through five liquid outlets.

[0248] It should be noted that there is also a structural diagram of the connection between the heating component and the first current collecting device on the back of the temperature regulating device 13, such as Fig.14 As shown, Fig.14 for Fig.13 A schematic structural diagram of the back side of the temperature regulating device, wherein a liquid outlet in the second collecting device 33 is connected to a liquid inlet of the first collecting device 31 through a heating pipe 102, and two thermistors 101 are attached to the heating pipe 102.

[0249] In one embodiment, the present application also provides a liquid cooling unit, such as Fig.15 As shown, pressure sensors 151 and temperature sensors 152 can be set on the first collecting device, the second collecting device, and the pipes of the cooling component. The temperature of the coolant can be regulated in real time through each pressure sensor and each temperature sensor; and the coolant in the condenser is cooled by the fan 153, thereby improving the efficiency of temperature regulation of the liquid cooling unit.

[0250] It can be understood that the design of each structure in the energy storage system in the above embodiment is only one example of achieving the technical effect of the present application. In practical applications, it can also be adaptively deformed to achieve easily conceivable technical effects. The embodiments of the present application do not limit its structure.

[0251] Next, the temperature control methods provided in the embodiments of the present application are described. The temperature control methods in the embodiments of the present application are all applied to energy storage systems and are described with the battery management system as the execution subject.

[0252] In one embodiment, Fig.16 As shown, a temperature control method is provided, which is applied to an energy storage system, the energy storage system comprising: a battery management system and an energy storage device; the energy storage device comprises a liquid cooling unit and at least one energy storage unit, the liquid cooling unit comprises at least one driving pump; each energy storage unit corresponds to a driving pump, and the embodiment comprises the following steps:

[0253] S1601, obtaining status information of each energy storage unit in the energy storage device.

[0254] The state information of the energy storage unit may be parameters related to the state of the energy storage unit, such as the capacity, charging state, discharging state, temperature, etc. of the energy storage unit.

[0255] Acquiring status information of each energy storage unit in the energy storage device may include respectively setting at least one status sensor on each energy storage unit, collecting status information of each energy storage unit through the status sensor, and sending the status information of each energy storage unit to the battery management system.

[0256] Optionally, at least one state sensor may be provided corresponding to an energy storage unit. For example, a temperature sensor and a pressure sensor may be provided on the energy storage unit, and the temperature information of the energy storage unit may be collected by the temperature sensor, and the pressure information of the energy storage unit may be collected by the pressure sensor, and so on.

[0257] S1602, according to the status information of each energy storage unit, controlling the flow rate of the coolant output by the driving pump corresponding to each energy storage unit to adjust the temperature of the corresponding energy storage unit.

[0258] Among them, the driving pump outputs coolant, which means that the driving pump discharges or pushes the coolant out of the temperature regulating device in the liquid cooling unit to complete the temperature control of the energy storage unit; the flow rate of the driving pump outputs coolant can represent the amount of coolant flowing through the driving pump per unit time. Optionally, the greater the flow rate of the driving pump outputs coolant, the greater the heat taken away from the energy storage unit. Therefore, the temperature of the corresponding energy storage unit can be controlled by adjusting the flow rate of the driving pump outputs coolant.

[0259] In one embodiment, the method for controlling the flow rate of coolant output by the drive pump corresponding to each energy storage unit may be to input the status information of each energy storage unit into a preset flow determination model, analyze the status information of each energy storage unit through the flow determination model, and obtain the output flow rate of the drive pump corresponding to each energy storage unit, and then the battery management system can control the flow rate of coolant output by each drive pump according to the output flow rate of each drive pump.

[0260] In another embodiment, the speed of the driving pump corresponding to each energy storage unit can be adjusted to control the flow rate of the coolant output by the corresponding driving pump; specifically, the speed of the driving pump corresponding to each energy storage unit is determined according to the status information of each energy storage unit, and then the battery management system can control the flow rate of the coolant output by each driving pump according to the speed of each driving pump to adjust the temperature of the corresponding energy storage unit; optionally, the status information of each energy storage unit can be input into a preset speed determination model, and the status information of each energy storage unit can be analyzed by the speed determination model to obtain the speed of the driving pump corresponding to each energy storage unit.

[0261] A temperature control method provided in an embodiment of the present application is applied to an energy storage system, wherein the energy storage system includes: a battery management system and an energy storage device, wherein the energy storage device includes a liquid cooling unit and at least one energy storage unit, and the liquid cooling unit includes at least one drive pump, and each energy storage unit corresponds to a drive pump; status information of each energy storage unit in the energy storage device is obtained, and according to the status information of each energy storage unit, the flow rate of coolant output by the drive pump corresponding to each energy storage unit is controlled to control the temperature of the corresponding energy storage unit. In the method, a battery management system is connected to each driving pump in a liquid cooling unit, so that the battery management system can control the output flow of each driving pump according to the status information of each energy storage unit, so that the output flow of each driving pump can be dynamically changed with the status information of the corresponding energy storage unit, thereby improving the flexibility of temperature control of the energy storage unit; and the output flow of each driving pump can be dynamically adjusted according to the actual demand of each energy storage unit, so that the cooling demand of the energy storage unit corresponding to each driving pump is met, so that the temperature of each energy storage unit can be effectively controlled to be within the demand range, thereby improving the life and performance of the energy storage unit; and the output flow of each driving pump is controlled in real time according to demand, which reduces the power consumption of each driving pump, realizes the intelligent use of the driving pump in the liquid cooling unit, and improves the competitiveness of the product.

[0262] The status information may include the temperature of each energy storage unit. In one embodiment, the flow rate of coolant output by the drive pump corresponding to each energy storage unit is controlled according to the status information of each energy storage unit, including: controlling the flow rate of coolant output by the drive pump corresponding to each energy storage unit according to the temperature of each energy storage unit.

[0263] Since controlling the flow rate of coolant output by the driving pump corresponding to each energy storage unit is to regulate the temperature of each energy storage unit, the flow rate of coolant output by the driving pump corresponding to each energy storage unit can be controlled according to the temperature of each energy storage unit to regulate the temperature of each energy storage unit.

[0264] Among them, the temperature of each energy storage unit can be compared with the standard temperature of the energy storage unit, and the output flow rate of the driving pump corresponding to each energy storage unit can be determined according to the comparison result, so as to control the flow rate of the coolant output by each driving pump according to the output flow rate of each driving pump; for example, the output flow rate of the driving pump corresponding to each energy storage unit can be determined according to the difference between the temperature of each energy storage unit and the standard temperature, and the corresponding relationship between the difference and the flow rate; that is, the flow rate corresponding to the difference between the temperature of each energy storage unit and the standard temperature in the corresponding relationship between the difference and the flow rate is determined as the output flow rate of the driving pump corresponding to each energy storage unit.

[0265] In an optional embodiment, the flow corresponding to the temperature of each energy storage unit can also be directly obtained from the preset correspondence between temperature and flow, and the flow corresponding to the temperature of each energy storage unit in the correspondence is determined as the output flow of the driving pump corresponding to each energy storage unit, and then the flow of the coolant output by each driving pump is controlled according to the output flow of each driving pump.

[0266] The temperature control method provided in the embodiment of the present application controls the flow rate of the coolant output by the driving pump corresponding to each energy storage unit according to the temperature of each energy storage unit. In this method, since the temperature of each energy storage unit can reflect the actual cooling demand of each energy storage unit, the flow rate of the coolant output by the driving pump corresponding to each energy storage unit is controlled according to the temperature of each energy storage unit, and accurate cooling control of each energy storage unit can be achieved, so that the temperature of each energy storage unit is within the required temperature range, and the life and performance of each energy storage unit are improved.

[0267] In one embodiment, Fig.17 As shown, according to the temperature of each energy storage unit, controlling the flow rate of the coolant output by the driving pump corresponding to each energy storage unit includes the following steps:

[0268] S1701, determining a first energy storage unit from among the energy storage units according to the temperature of each energy storage unit.

[0269] The first energy storage unit may be an energy storage unit that requires temperature control.

[0270] Therefore, the temperature of each energy storage unit can be compared with the allowable standard temperature of the energy storage unit, and the first energy storage unit can be determined according to the comparison result; for example, the energy storage unit whose temperature is inconsistent with the standard temperature can be determined as the first energy storage unit. Optionally, the standard temperature of each energy storage unit can be the same or different.

[0271] In one embodiment, Fig.18 As shown, according to the temperature of each energy storage unit, determining the first energy storage unit from each energy storage unit includes the following steps:

[0272] S1801, obtaining the temperature difference between each adjacent energy storage unit in all energy storage units.

[0273] According to the temperature of each energy storage unit, the temperature difference between all adjacent energy storage units is calculated. For example, the energy storage includes: energy storage unit A, energy storage unit B, energy storage unit C and energy storage unit D in sequence, then the temperature difference between energy storage unit A and energy storage unit B, the temperature difference between energy storage unit B and energy storage unit C, and the temperature difference between energy storage unit C and energy storage unit D are calculated.

[0274] S1802: Determine an adjacent energy storage unit whose temperature difference is greater than a first boundary value as a first energy storage unit.

[0275] For example, if the energy storage unit is an electric cabinet, the temperature difference between the electric cabinets exceeds a certain temperature, which may cause uneven current and even cause inter-cabinet circulation, seriously affecting the overall life of the energy storage device cabinet. Therefore, the first boundary value can be the maximum allowable temperature difference between adjacent energy storage units. For example, the first boundary value is 2°C.

[0276] Therefore, the adjacent energy storage unit whose temperature difference is greater than the first boundary value is determined as the first energy storage unit.

[0277] The temperature control method provided in the embodiment of the present application obtains the temperature difference between each adjacent energy storage unit in all energy storage units, and determines the adjacent energy storage unit whose temperature difference is greater than the first boundary value as the first energy storage unit. In this method, since the temperature difference between adjacent energy storage units exceeds a certain temperature difference, the current unevenness may be caused by the uneven temperature. Therefore, the adjacent energy storage unit whose temperature difference is greater than the first boundary value can be determined as the first energy storage unit, so as to subsequently adjust the output flow of the driving pump corresponding to the first energy storage unit.

[0278] S1702, controlling the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit according to the preset first temperature range and the temperature of the first energy storage unit.

[0279] Among them, the first temperature range can be the temperature requirement range of the energy storage unit, and the first energy storage unit is an adjacent energy storage unit with a temperature difference greater than the first boundary value. Therefore, the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit can be adjusted according to the preset first temperature range and the temperature of the first energy storage unit, thereby adjusting the temperature of the first energy storage unit.

[0280] In one embodiment, the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit can be determined according to a preset flow adjustment model; specifically, the first temperature range and the temperature of the first energy storage unit are input into the flow adjustment model, the first temperature range and the temperature of the first energy storage unit are analyzed by the flow adjustment model, and the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit is output.

[0281] The temperature control method provided in the embodiment of the present application determines the first energy storage unit from the energy storage units according to the temperature of each energy storage unit, and controls the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit according to the preset first temperature range and the temperature of the first energy storage unit. In this method, since the first temperature range is the temperature requirement range of the energy storage unit, the first temperature range is considered when regulating the output flow rate of the driving pump corresponding to the first energy storage unit, thereby improving the accuracy of the output flow rate of the driving pump corresponding to the first energy storage unit, thereby achieving accurate control of the temperature of the first energy storage unit, so that the temperature of the first energy storage unit is within the required temperature range.

[0282] By comparing the temperature of the first energy storage unit with the first temperature range, the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit can be controlled. This is described in detail below through an embodiment. In one embodiment, Fig.19 As shown, according to the preset first temperature range and the temperature of the first energy storage unit, controlling the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit includes the following steps:

[0283] S1901, when the temperature of the first energy storage unit is within a first temperature range, controlling a driving pump corresponding to the first energy storage unit to maintain a current output state.

[0284] It should be noted that the first energy storage unit is an adjacent energy storage unit whose temperature difference is greater than the first boundary value. Therefore, the first energy storage unit includes at least two, and the flow rate of the coolant output by the drive pumps corresponding to the two energy storage units can be controlled.

[0285] The first temperature range may be a battery temperature requirement range of the energy storage unit, that is, for any energy storage unit, when the temperature of the first energy storage unit is within the first temperature range, it indicates that the temperature of the first energy storage unit is appropriate, and the flow rate of the coolant output by the drive pump corresponding to the energy storage unit may not be adjusted. Therefore, when the temperature of the first energy storage unit is within the first temperature range, the drive pump corresponding to the first energy storage unit is controlled to maintain the current output state.

[0286] It should be noted that the difference between the maximum value and the minimum value in the first temperature range may be smaller than the first boundary value.

[0287] S1902, when the temperature of the first energy storage unit is outside the first temperature range, adjust the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value.

[0288] When the temperature of the first energy storage unit is outside the first temperature range, it indicates that the temperature of the first energy storage unit is abnormal, and the flow rate of the coolant output by the drive pump corresponding to the first energy storage unit needs to be adjusted until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value.

[0289] Optionally, the first boundary value may be equal to the second boundary value; alternatively, in order to reduce the frequency of adjusting the output flow of the driving pump, the first boundary value may be greater than the second boundary value.

[0290] When the temperature of the first energy storage unit is outside the first temperature range, the temperature of the first energy storage unit can be used as an input of a flow adjustment method according to a preset flow adjustment method, and the output flow of the driving pump corresponding to the first energy storage unit can be obtained by running the flow adjustment method. The flow rate of the coolant output by the corresponding driving pump is controlled according to the output flow of the driving pump corresponding to the first energy storage unit, so as to regulate the temperature of the corresponding first energy storage unit until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value.

[0291] It should be noted that if the temperature difference between the first energy storage unit and the adjacent energy storage unit is still less than the second boundary value after the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit is adjusted, the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit will continue to be controlled until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value.

[0292] The temperature control method provided in the embodiment of the present application controls the driving pump corresponding to the first energy storage unit to maintain the current output state when the temperature of the first energy storage unit is within the first temperature range; and adjusts the flow rate of the cooling liquid output by the driving pump corresponding to the first energy storage unit when the temperature of the first energy storage unit is outside the first temperature range until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value. In this method, the output flow rate of the driving pump corresponding to the first energy storage unit is regulated only when the temperature of the first energy storage unit is outside the first temperature range, thereby improving the accuracy of the temperature control of the first energy storage unit.

[0293] The situation where the temperature of the first energy storage unit is outside the first temperature range includes: the temperature of the first energy storage unit is greater than the maximum value of the first temperature range, or the temperature of the first energy storage unit is less than the minimum value of the first temperature range.

[0294] The following first describes the case where the temperature of the first energy storage unit is greater than the maximum value of the first temperature range. In one embodiment, Fig. 20As shown, when the temperature of the first energy storage unit is outside the first temperature range, adjusting the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value, including the following steps:

[0295] S2001: Generate a first flow request when the temperature of the first energy storage unit is greater than the maximum value of the first temperature range.

[0296] When the temperature of the first energy storage unit is greater than the maximum value of the first temperature range, it indicates that the temperature of the first energy storage unit is relatively high, and therefore, the first energy storage unit needs to be cooled down, and accordingly, the flow rate of the coolant output by the drive pump corresponding to the first energy storage unit needs to be increased. The first flow request may be generated according to a preset flow increase strategy; the first flow request may include the flow rate of the coolant output by the drive pump corresponding to the first energy storage unit, and / or the output flow rate that needs to be increased by the drive pump corresponding to the first energy storage unit.

[0297] The following description will be made by taking the first flow request including the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit as an example.

[0298] In one embodiment, the flow increase strategy may include a fixed flow value, which is the output flow value that the driving pump needs to increase each time. Therefore, the sum of the current coolant output flow rate of the driving pump corresponding to the first energy storage unit and the fixed flow value is determined as the output flow rate that the driving pump corresponding to the first energy storage unit needs to increase to, and then a first flow request is generated according to the output flow rate that the driving pump corresponding to the first energy storage unit needs to increase to; wherein the fixed flow value is the output flow rate that the driving pump corresponding to the first energy storage unit needs to increase.

[0299] In an optional embodiment, the flow increase strategy may also include a correspondence between a temperature difference and an output flow that needs to be increased by the drive pump, wherein the temperature difference in the correspondence represents the difference between the temperature of the first energy storage unit and the maximum value of the first temperature range. Therefore, according to the difference between the temperature of the first energy storage unit and the maximum value of the first temperature range, the output flow that needs to be increased by the drive pump corresponding to the first energy storage unit is determined from the correspondence, and according to the sum of the output flow that needs to be increased by the drive pump corresponding to the first energy storage unit and the current flow rate of the coolant output by the drive pump corresponding to the first energy storage unit, the output flow that needs to be increased by the drive pump corresponding to the first energy storage unit is determined, and then a first flow request is generated according to the output flow that needs to be increased by the drive pump corresponding to the first energy storage unit.

[0300] Optionally, based on the above method, a first flow rate request including an output flow rate that needs to be increased by a driving pump corresponding to the first energy storage unit may also be generated.

[0301] S2002, sending a first flow request to a liquid cooling unit controller in the liquid cooling unit; the first flow request is used to instruct the liquid cooling unit controller to increase the flow rate of the coolant output by the drive pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than a second boundary value.

[0302] The first flow request generated above is sent to the liquid cooling unit controller in the liquid cooling unit. After receiving the first flow request, the liquid cooling unit controller can control the increase in the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit according to the first flow request until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value.

[0303] For example, if the first flow request includes the output flow that the driving pump corresponding to the first energy storage unit needs to increase to, the liquid cooling unit controller can increase the flow rate of coolant output by the driving pump corresponding to the first energy storage unit according to the output flow that the driving pump corresponding to the first energy storage unit needs to increase to in the first flow request, until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value.

[0304] It should be noted that if the temperature difference between the first energy storage unit and the adjacent energy storage unit is not less than the second boundary value after the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit is adjusted according to the first flow request, the operation of adjusting the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit will continue until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value.

[0305] The temperature control method provided in the embodiment of the present application generates a first flow request when the temperature of the first energy storage unit is greater than the maximum value of the first temperature range; the first flow request is sent to the liquid cooling unit controller in the liquid cooling unit; the first flow request is used to instruct the liquid cooling unit controller to increase the flow rate of the coolant output by the drive pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value. In this method, when the temperature of the first energy storage unit is greater than the maximum value of the first temperature range, it means that the temperature of the first energy storage unit is too high, and at this time, the output flow rate of the drive pump is controlled to increase, thereby realizing the temperature reduction of the first energy storage unit, and improving the precise control of the temperature of the first energy storage unit.

[0306] The above embodiment is a description of the case where the temperature of the first energy storage unit is greater than the maximum value of the first temperature range. The following is a description of the case where the temperature of the first energy storage unit is less than the minimum value of the first temperature range through an embodiment. In one embodiment, Fig.21As shown, when the temperature of the first energy storage unit is outside the first temperature range, adjusting the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value, including the following steps:

[0307] S2101: Generate a second flow request when the temperature of the first energy storage unit is lower than a minimum value of the first temperature range.

[0308] When the temperature of the first energy storage unit is less than the minimum value of the first temperature range, it means that the temperature of the first energy storage unit is relatively low, and therefore, the first energy storage unit needs to be heated up, and accordingly, the flow rate of the coolant output by the drive pump corresponding to the first energy storage unit needs to be reduced. The second flow request may be generated according to a preset flow reduction strategy; the second flow request may include the flow rate of the coolant output by the drive pump corresponding to the first energy storage unit, and / or the output flow rate that needs to be reduced by the drive pump corresponding to the first energy storage unit.

[0309] The following description will be made by taking the second flow request including the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit as an example.

[0310] In one embodiment, the flow reduction strategy may include a fixed flow value, which is the output flow value that the driving pump needs to reduce each time. Therefore, the difference between the current flow rate of the coolant output by the driving pump corresponding to the first energy storage unit and the fixed flow value is determined as the output flow rate that the driving pump corresponding to the first energy storage unit needs to reduce, and then a second flow request is generated according to the output flow rate that the driving pump corresponding to the first energy storage unit needs to reduce; wherein the fixed flow value is the output flow rate that the driving pump corresponding to the first energy storage unit needs to reduce.

[0311] In an optional embodiment, the flow reduction strategy may also include a correspondence between a temperature difference and an output flow that the drive pump needs to increase, wherein the temperature difference in the correspondence represents the difference between the temperature of the first energy storage unit and the minimum value of the first temperature range. Therefore, according to the difference between the temperature of the first energy storage unit and the minimum value of the first temperature range, the output flow that the drive pump corresponding to the first energy storage unit needs to reduce is determined from the correspondence, and according to the difference between the current flow rate of the coolant output by the drive pump corresponding to the first energy storage unit and the output flow that the drive pump corresponding to the first energy storage unit needs to reduce, the output flow that the drive pump corresponding to the first energy storage unit needs to reduce is determined, and then a second flow request is generated according to the output flow that the drive pump corresponding to the first energy storage unit needs to reduce.

[0312] Optionally, based on the above method, a second flow rate request including the output flow rate that the driving pump corresponding to the first energy storage unit needs to reduce may also be generated.

[0313] S2102, sending a second flow request to a liquid cooling unit controller in the liquid cooling unit, the second flow request is used to instruct the liquid cooling unit controller to reduce the flow rate of the coolant output by the drive pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than a second boundary value.

[0314] The second flow request generated above is sent to the liquid cooling unit controller in the liquid cooling unit. After receiving the second flow request, the liquid cooling unit controller can control the driving pump corresponding to the first energy storage unit to reduce the flow rate of the coolant output according to the second flow request until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value.

[0315] For example, if the second flow request includes the output flow rate to which the driving pump corresponding to the first energy storage unit needs to be reduced, the liquid cooling unit controller can reduce the flow rate of coolant output by the driving pump corresponding to the first energy storage unit according to the output flow rate to which the driving pump corresponding to the first energy storage unit needs to be reduced in the second flow request, until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value.

[0316] It should be noted that if the temperature difference between the first energy storage unit and the adjacent energy storage unit is not less than the second boundary value after the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit is adjusted according to the second flow request, the operation of adjusting the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit will continue until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value.

[0317] The temperature control method provided in the embodiment of the present application generates a second flow request when the temperature of the first energy storage unit is less than the minimum value of the first temperature range; the second flow request is sent to the liquid cooling unit controller in the liquid cooling unit, and the second flow request is used to instruct the liquid cooling unit controller to reduce the flow rate of the coolant output by the drive pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value. In this method, when the temperature of the first energy storage unit is less than the minimum value of the first temperature range, it means that the temperature of the first energy storage unit is low, and at this time, the output flow rate of the drive pump is controlled to decrease, thereby achieving the temperature increase of the first energy storage unit and improving the precise control of the temperature of the first energy storage unit.

[0318] During the operation of the energy storage unit, the energy storage unit may experience thermal runaway. The following describes the thermal runaway scenario of the energy storage unit. Fig. 22 As shown, according to the temperature of each energy storage unit, the flow rate of the coolant output by the driving pump corresponding to each energy storage unit is controlled, including:

[0319] S2201, determining an energy storage unit whose temperature is greater than a preset thermal runaway temperature threshold as a thermal runaway energy storage unit.

[0320] Among them, the thermal runaway energy storage unit refers to an energy storage battery that has experienced thermal runaway; thermal runaway may mean that the temperature of the energy storage unit exceeds the set safe temperature range. If the energy storage unit has thermal runaway, it may cause the energy storage unit to fail to work normally, and may even cause serious consequences such as accidents, damage or fire. Therefore, it is extremely necessary to cool down the energy storage unit with thermal runaway in time.

[0321] Therefore, the thermal runaway temperature threshold may be a temperature threshold at which the energy storage unit can operate within a safe temperature range; if the temperature of the energy storage unit is greater than the thermal runaway temperature threshold, it may indicate that the temperature of the energy storage unit exceeds the safe temperature, so the energy storage unit with a temperature greater than the thermal runaway temperature threshold is determined as a thermal runaway energy storage unit.

[0322] S2202, determining a second energy storage unit according to the thermal runaway energy storage unit, and controlling the flow rate of the coolant output by a driving pump corresponding to the second energy storage unit.

[0323] Among them, the thermal runaway energy storage unit can be determined as the second energy storage unit. In order to achieve rapid cooling of the second energy storage unit, the driving pump corresponding to the second energy storage unit can be controlled to run at full load, that is, the flow rate of the coolant output by the driving pump corresponding to the second energy storage unit is controlled to be the maximum flow rate of the driving pump.

[0324] In order to prevent the occurrence of heat diffusion, the drive pumps corresponding to the thermal runaway energy storage unit and the adjacent energy storage units can also be operated at full load and constant speed, and the thermal runaway energy storage battery can be cooled down at the maximum cooling capacity for a short time. Fig.23 As shown, determining the second energy storage unit according to the thermal runaway energy storage unit and controlling the flow rate of the coolant output by the driving pump corresponding to the second energy storage unit includes the following steps:

[0325] S2301, obtaining adjacent energy storage units within a preset distance range from the thermal runaway energy storage unit, and determining the thermal runaway energy storage unit and the adjacent energy storage units as second energy storage units.

[0326] Among them, the location of each energy storage unit can be stored in the battery management system. Therefore, after the thermal runaway energy storage unit is determined, the distances between other energy storage units in other energy storage devices and the thermal runaway energy storage unit can be calculated, and energy storage units within a preset distance range from the thermal runaway energy storage unit can be determined as adjacent energy storage units, and then the thermal runaway energy storage unit and the adjacent energy storage unit can be determined as the second energy storage unit.

[0327] S2302: adjusting, by means of a liquid cooling unit controller in the liquid cooling unit, the flow rate of the coolant output by the driving pump corresponding to each second energy storage unit to be the maximum flow rate of the driving pump.

[0328] The flow rate of the coolant output by the driving pump corresponding to the second energy storage unit is determined as the maximum flow rate of the driving pump, and the flow rate of the coolant output by the driving pump corresponding to the second energy storage unit is adjusted to the maximum flow rate of the driving pump by a liquid cooling unit controller in the liquid cooling unit. The maximum flow rate of the driving pump may be the maximum flow rate that the driving pump can handle.

[0329] Specifically, after the battery management system determines the second energy storage unit, it generates a maximum flow instruction for the driving pump corresponding to the second energy storage unit, and sends the maximum flow instruction to the liquid cooling unit controller of the liquid cooling unit. The maximum flow instruction is used to instruct the liquid cooling unit controller to control the driving pump corresponding to the second energy storage unit to output the flow rate of coolant to be the maximum flow rate of the driving pump.

[0330] The temperature control method provided in the embodiment of the present application obtains adjacent energy storage units within a preset distance range from the thermal runaway energy storage unit, determines the thermal runaway energy storage unit and the adjacent energy storage unit as the second energy storage unit, and adjusts the flow rate of the coolant output by the drive pump corresponding to each second energy storage unit to the maximum flow rate of the drive pump through the liquid cooling unit controller in the liquid cooling unit. In this method, the output flow rate of the drive pump corresponding to the thermal runaway energy storage unit is adjusted to the maximum flow rate, so that the thermal runaway energy storage unit can be cooled with the maximum cooling capacity in a short time, and rapid cooling is achieved; and at the same time, the drive pump corresponding to the adjacent energy storage unit of the thermal runaway energy storage unit is also operated at the maximum flow rate, reducing the risk of heat diffusion of the thermal runaway energy storage unit.

[0331] The temperature control method provided in the embodiment of the present application determines an energy storage unit whose temperature is greater than a preset thermal runaway temperature threshold as a thermal runaway energy storage unit; determines a second energy storage unit based on the thermal runaway energy storage unit, and controls the flow rate of the coolant output by the drive pump corresponding to the second energy storage unit. In this method, since the second energy storage unit is determined based on the thermal runaway energy storage unit, and the thermal runaway energy storage unit is an energy storage unit whose temperature is greater than the thermal runaway temperature threshold, the output flow rate of the drive pump corresponding to the second energy storage unit is controlled, so that the energy storage unit with temperature control requirements is temperature controlled in a targeted manner, thereby improving the flexibility of temperature control of each energy storage unit.

[0332] When the cooling capacity demand of each energy storage unit is low, the drive pumps corresponding to each energy storage unit can be controlled to run at a low speed to achieve energy saving and consumption reduction. Fig.24 As shown, according to the temperature of each energy storage unit, controlling the flow rate of the coolant output by the driving pump corresponding to each energy storage unit includes the following steps:

[0333] S2401, generating a self-circulation instruction when the temperature of each energy storage unit is within a preset second temperature range.

[0334] The self-circulation instruction may be a circulation mode of the coolant inside the liquid cooling unit, under which the coolant can circulate by itself through the circulation pipeline inside the liquid cooling unit. The second temperature range may be a more suitable temperature range for the energy storage unit, and the second temperature range may be determined according to the actual operating state of the energy storage unit.

[0335] Therefore, when the temperature of each energy storage unit is within the preset second temperature range, the cooling capacity requirement of each energy storage unit is extremely low, and the battery management system can generate a self-circulation instruction.

[0336] S2402, sending a self-circulation instruction to a liquid cooling unit controller in the liquid cooling unit, wherein the self-circulation instruction is used to instruct the liquid cooling unit controller to control the drive pump corresponding to each energy storage unit to output a preset flow of coolant.

[0337] After receiving the self-circulation instruction, the liquid cooling unit controller can control the driving pump corresponding to each energy storage unit to run at a low speed, that is, it can control the driving pump corresponding to each energy storage unit to output the coolant at a preset flow rate.

[0338] The preset flow rate is a low flow rate, and the preset flow rate is less than a first flow rate threshold.

[0339] The temperature control method provided in the embodiment of the present application generates a self-circulation instruction when the temperature of each energy storage unit is within a preset second temperature range, and sends the self-circulation instruction to the liquid cooling unit controller in the liquid cooling unit. The self-circulation instruction is used to instruct the liquid cooling unit controller to control the drive pump corresponding to each energy storage unit to output a preset flow of coolant. In this method, when the cooling capacity demand of each energy storage unit is low, the drive pump corresponding to each energy storage unit can be controlled to operate in the self-circulation mode of the liquid cooling unit, that is, each drive pump operates at a preset flow rate, thereby reducing the power consumption of the liquid cooling unit.

[0340] The above embodiments all control the flow rate of the coolant output by the driving pump based on the temperature of the energy storage unit. The following is an example of using the working condition information of the energy storage unit to control the flow rate of the coolant output by the driving pump corresponding to the energy storage unit.

[0341] The status information includes the operating condition information of the energy storage unit; in one embodiment, the flow rate of the coolant output by the driving pump corresponding to each energy storage unit is controlled according to the status information of each energy storage unit, including: for any energy storage unit, according to the operating condition information of the energy storage unit and a preset operating condition threshold, the flow rate of the coolant output by the driving pump corresponding to the energy storage unit is controlled.

[0342] The operating condition information of the energy storage unit may be parameters and indicators describing the state and performance of the energy storage unit, and may include the working condition and energy storage condition of the energy storage unit.

[0343] Therefore, the output flow rate of the driving pump corresponding to the energy storage unit can be determined by comparing the operating condition information of the energy storage unit with the preset operating condition threshold, and then the flow rate of the coolant output by the corresponding driving pump can be adjusted by controlling the liquid cooling unit controller according to the output flow rate of the driving pump corresponding to the energy storage unit.

[0344] For example, when the operating condition information of the energy storage unit is greater than a preset operating condition threshold, it indicates that the energy storage unit is in a high-load cooling capacity demand condition, a third flow request is generated, and the third flow request is sent to the liquid cooling unit controller of the liquid cooling unit. The third flow request is used to instruct the liquid cooling unit controller to increase the flow rate of the coolant output by the drive pump corresponding to the energy storage unit.

[0345] Among them, a third flow request can be generated according to a preset high cooling capacity demand strategy, that is, when the operating condition information of the energy storage unit is greater than a preset operating condition threshold, a third flow request is directly generated, and the third flow request may include the flow rate of coolant that the drive pump corresponding to the energy storage unit needs to output.

[0346] When the operating condition information of the energy storage unit is less than the preset operating condition threshold, it indicates that the energy storage unit is in a low-load cooling capacity demand condition, and a fourth flow request is generated and sent to the liquid cooling controller of the liquid cooling unit. The fourth flow request is used to instruct the liquid cooling unit controller to reduce the flow rate of the coolant output by the drive pump corresponding to the energy storage unit.

[0347] Among them, the fourth flow request can be generated according to the preset low cooling capacity demand strategy, that is, when the operating condition information of the energy storage unit is less than the preset operating condition threshold, the fourth flow request is directly generated, and the fourth flow request can include the flow rate of coolant that the drive pump corresponding to the energy storage unit needs to output.

[0348] The temperature control method provided in the embodiment of the present application controls the flow rate of the coolant output by the drive pump corresponding to the energy storage unit for any energy storage unit according to the working condition information of the energy storage unit and the preset working condition threshold. In this method, since the working condition threshold can reflect the standard working condition of the energy storage unit, the cooling demand of each energy storage unit can be determined according to the working condition information and working condition threshold of each energy storage unit, and then the flow rate of the coolant output by the drive pump corresponding to each energy storage unit can be controlled, so that each energy storage unit can be accurately cooled and the performance and life of the energy storage unit can be improved.

[0349] In one embodiment, Fig.25 As shown, according to the working condition information of the energy storage unit and the preset working condition threshold, controlling the flow rate of the coolant output by the driving pump corresponding to the energy storage unit includes the following steps:

[0350] S2501, when the value of the operating condition information of the energy storage unit is greater than a preset first operating condition threshold, controlling a driving pump corresponding to the energy storage unit to output coolant at a first flow rate.

[0351] The first operating condition threshold may be a higher operating condition threshold. When the value of the operating condition information of the energy storage unit is greater than the first operating condition threshold, it indicates that the energy storage unit is in a high-load cooling capacity demand condition, and the drive pump corresponding to the energy storage unit is controlled to output coolant at a first flow rate; wherein the first flow rate may be the maximum flow rate of the drive pump.

[0352] Optionally, after the battery management system determines that the output flow of the driving pump corresponding to the energy storage battery is the first flow, the first flow of the driving pump corresponding to the energy storage unit can be sent to the liquid cooling unit controller of the liquid cooling unit, and the driving pump corresponding to the energy storage unit is controlled by the liquid cooling unit controller to output coolant at the first flow.

[0353] S2502: When the value of the operating condition information of the energy storage unit is less than a preset second operating condition threshold, control a drive pump corresponding to the energy storage unit to output coolant at a second flow rate.

[0354] Among them, the first operating condition threshold is greater than the second operating condition threshold, and the first flow rate is greater than the second flow rate.

[0355] The second operating condition threshold may be a lower operating condition threshold. When the value of the operating condition information of the energy storage unit is less than the second operating condition threshold, it indicates that the energy storage unit is in a low-load cooling capacity demand condition, and the drive pump corresponding to the energy storage unit is controlled to output coolant at a second flow rate; wherein the second flow rate may be a pre-set lower flow value; the second flow rate is less than the first flow rate.

[0356] Optionally, after the battery management system determines that the output flow of the driving pump corresponding to the energy storage battery is the second flow, the second flow of the driving pump corresponding to the energy storage unit can be sent to the liquid cooling unit controller of the liquid cooling unit, and the driving pump corresponding to the energy storage unit is controlled by the liquid cooling unit controller to output coolant at the second flow.

[0357] The temperature control method provided in the embodiment of the present application controls the drive pump corresponding to the energy storage unit to output the coolant at a first flow rate when the value of the working condition information of the energy storage unit is greater than the preset first working condition threshold; controls the drive pump corresponding to the energy storage unit to output the coolant at a second flow rate when the value of the working condition information of the energy storage unit is less than the preset second working condition threshold; wherein the first working condition threshold is greater than the second working condition threshold, and the first flow rate is greater than the second flow rate. In this method, when the energy storage unit is in a high-load cooling capacity demand working condition, the corresponding drive pump can be controlled to operate at a larger output flow rate to fully meet the life and temperature requirements of the energy storage battery in the high-load cooling capacity demand working condition; when the energy storage unit is in a low-load cooling capacity demand working condition, the corresponding drive pump can be controlled to operate at a smaller output flow rate, that is, the drive pump is controlled to operate at a medium-low speed, while achieving the consumption reduction under the low-load cooling capacity demand working condition, reducing the risk of excess cooling capacity, and making the temperature of the energy storage unit within an appropriate temperature range, thereby improving the discharge capacity of the energy storage battery under low working conditions.

[0358] In one embodiment, the operating condition information includes the ambient temperature of the energy storage unit and / or the operating rate of the energy storage unit, wherein the operating rate may include the charge and discharge rate of the energy storage unit.

[0359] Accordingly, when the operating condition information includes the ambient temperature of the energy storage unit, the method of controlling the flow rate of the coolant output by the driving pump corresponding to the energy storage unit includes: when the ambient temperature of the energy storage unit is greater than a first temperature threshold, controlling the driving pump corresponding to the energy storage unit to output the coolant at a maximum flow rate; when the ambient temperature of the energy storage unit is less than a second temperature threshold, controlling the driving pump corresponding to the energy storage unit to output the coolant at a second flow rate.

[0360] When the operating condition information includes the operating ratio of the energy storage unit, the method of controlling the flow rate of the coolant output by the driving pump corresponding to the energy storage unit includes: when the operating ratio of the energy storage unit is greater than a first ratio threshold, controlling the driving pump corresponding to the energy storage unit to output the coolant at a maximum flow rate; when the operating ratio of the energy storage unit is less than a second ratio threshold, controlling the driving pump corresponding to the energy storage unit to output the coolant at a second flow rate.

[0361] In the case where the operating condition information includes the ambient temperature of the energy storage unit and the operating ratio of the energy storage unit, the method of controlling the flow rate of the coolant output by the driving pump corresponding to the energy storage unit includes: when the ambient temperature of the energy storage unit is greater than a first temperature threshold and the operating ratio of the energy storage unit is greater than the first ratio threshold, controlling the driving pump corresponding to the energy storage unit to output the coolant at a maximum flow rate; when the ambient temperature of the energy storage unit is less than a second temperature threshold and the operating ratio of the energy storage unit is less than a second ratio threshold, controlling the driving pump corresponding to the energy storage unit to output the coolant at a second flow rate.

[0362] In the temperature control method provided in the embodiment of the present application, the working condition information includes the ambient temperature of the energy storage unit and / or the working ratio of the energy storage unit. The flow rate of the coolant output by the corresponding driving pump is controlled according to the ambient temperature and working ratio of the energy storage unit. In this way, the energy storage unit can be accurately cooled and controlled according to the actual needs of the energy storage unit, so that the temperature of the energy storage unit is within a safe working range.

[0363] The following is a detailed description of a process of controlling a driving pump corresponding to an energy storage unit to output coolant at a second flow rate by using an embodiment. In one embodiment, Fig.26 As shown, the state information also includes the temperature of the energy storage unit. When the value of the operating condition information of the energy storage unit is less than a preset second operating condition threshold, controlling the drive pump corresponding to the energy storage unit to output the coolant at a second flow rate includes the following steps:

[0364] S2601: When the value of the operating condition information of the energy storage unit is less than a second operating condition threshold, generate a pulse width modulation signal of the energy storage unit according to the temperature of the energy storage unit.

[0365] When the value of the operating condition information of the energy storage unit is less than the second operating condition threshold, the temperature of the energy storage unit may be input into the control algorithm to determine a pulse width modulation (PWM) signal of the energy storage unit.

[0366] Optionally, a temperature difference may be determined based on the temperature of the energy storage unit and a preset target temperature of the energy storage unit, and the temperature difference may be input into a preset control algorithm to obtain a pulse width modulation signal of the energy storage unit.

[0367] S2602, sending a pulse width modulation signal of the energy storage unit to a liquid cooling unit controller in the liquid cooling unit, wherein the pulse width modulation signal is used to instruct the liquid cooling unit controller to adjust a drive pump corresponding to the energy storage unit to output coolant at a second flow rate.

[0368] After the battery management system obtains the pulse width modulation signal of the energy storage unit, it can send the pulse width modulation signal to the liquid cooling unit controller of the liquid cooling unit. The liquid cooling unit controller adjusts the flow rate of the coolant output by the driving pump corresponding to the energy storage unit according to the pulse width modulation signal. The flow rate of the coolant output by the driving pump corresponding to the energy storage unit according to the pulse width modulation signal is adjusted to be the second flow rate.

[0369] The temperature control method provided in the embodiment of the present application generates a pulse width modulation signal of the energy storage unit according to the temperature of the energy storage unit when the value of the working condition information of the energy storage unit is less than the second working condition threshold value; the pulse width modulation signal of the energy storage unit is sent to the liquid cooling unit controller in the liquid cooling unit, and the pulse width modulation signal is used to instruct the liquid cooling unit controller to adjust the drive pump corresponding to the energy storage unit to output the coolant at the second flow rate. In this method, the pulse width modulation signal can accurately control the working state of the equipment. Therefore, the pulse width modulation signal generated by the temperature of the energy storage unit controls the output flow of the corresponding drive pump, which can achieve precise control of the drive pump, thereby improving the accuracy of temperature control of the energy storage unit.

[0370] The state information of the energy storage unit may also include the operation information of the energy storage unit. Then, in one embodiment, Fig. 27 As shown, according to the status information of each energy storage unit, controlling the flow rate of the coolant output by the driving pump corresponding to each energy storage unit includes the following steps:

[0371] S2701, determining an energy storage unit in a non-operating state among all the energy storage units according to the operation information of each energy storage unit.

[0372] The energy storage unit in a non-working state includes a failed energy storage unit and / or an energy storage unit that has not been operated for a preset period of time.

[0373] The operation information of the energy storage unit may include the current, voltage, health status, etc. of the energy storage battery; the health status may reflect whether the energy storage unit has failed. Therefore, the energy storage unit that has failed among all the energy storage units may be determined based on the health status in the operation information of each energy storage unit, and the energy storage unit that has failed may be determined as an energy storage unit in a non-working state.

[0374] It is also possible to determine the energy storage units that are not in operation among all the energy storage units based on the voltage in the operation information of each energy storage unit, and obtain the operation information of the energy storage units that are not in operation within a historical preset time period, so as to determine the energy storage units that are not in operation within a preset time period among all the energy storage units, and then determine the energy storage units that are not in operation within the preset time period among all the energy storage units as energy storage units in a non-working state.

[0375] In the temperature control method provided in the embodiment of the present application, the energy storage unit in a non-working state includes a failed energy storage unit and / or an energy storage unit that has not been operated for a preset period of time. By processing the failed energy storage unit and the energy storage unit that has not been operated for a preset period of time offline, the power consumption of the liquid cooling unit is reduced.

[0376] S2702, controlling the driving pump corresponding to the energy storage unit in a non-working state to be in a dormant state.

[0377] For energy storage units that are in a non-working state due to failure or long-term unused, the battery management system can perform offline processing on the non-working energy storage units, that is, the non-working energy storage units are only collected but not used for the judgment of thermal management related modes.

[0378] Among them, for the energy storage unit in a non-working state, the battery management system can control the corresponding driving pump to enter a dormant state, that is, the driving pump stops working.

[0379] Specifically, the battery management system can generate a sleep instruction for the energy storage unit in a non-working state, and send the sleep instruction to the liquid cooling unit controller of the liquid cooling unit. The liquid cooling unit controller controls the corresponding driving pump to be in a sleep state according to the sleep instruction.

[0380] The temperature control method provided in the embodiment of the present application determines the energy storage unit in a non-working state among all the energy storage units according to the operation information of each energy storage unit, and controls the drive pump corresponding to the energy storage unit in a non-working state to be in a dormant state. In this method, the temperature of the energy storage unit in a non-working state and the corresponding drive pump do not participate in the thermal management of the energy storage system, which improves the accuracy of temperature control of other energy storage units and reduces the power consumption of the corresponding drive pump.

[0381] In one embodiment, the present application also provides a temperature control method, which is applied to an energy storage system, wherein the liquid cooling unit includes a liquid cooling unit controller, and the energy storage unit is an electric cabinet and the drive pump is a variable speed water pump. Fig.28 As shown, the method comprises the following steps:

[0382] S2801, the battery management system obtains status information of each power cabinet; the status information includes temperature, working condition information and operation information.

[0383] The operating condition information includes the ambient temperature of the electric cabinet and / or the operating multiple of the electric cabinet.

[0384] S2802: The battery management system obtains the temperature difference between each adjacent electric cabinet among all the electric cabinets, and determines the adjacent electric cabinet whose temperature difference is greater than a first boundary value as the first electric cabinet.

[0385] S2803: For any first electric cabinet, when the temperature of the first electric cabinet is within a first temperature range, determine that the flow rate of the coolant output by the variable speed water pump corresponding to the first electric cabinet remains unchanged.

[0386] S2804: When the temperature of the first electric cabinet is outside the first temperature range, control the flow rate of the coolant output by the variable speed water pump of the first electric cabinet through the liquid cooling unit controller.

[0387] Among them, when the temperature of the first electric cabinet is greater than the maximum value of the first temperature range, a first control instruction is generated and sent to the liquid cooling unit controller. The first control instruction is used to instruct the liquid cooling unit controller to increase the flow rate of coolant output by the variable speed water pump corresponding to the first electric cabinet until the temperature difference between the first electric cabinet and the adjacent electric cabinet is less than the second boundary value.

[0388] When the temperature of the first electric cabinet is lower than the minimum value of the first temperature range, a second control instruction is generated and sent to the liquid cooling unit controller. The second control instruction is used to instruct the liquid cooling unit controller to reduce the flow rate of coolant output by the variable speed water pump corresponding to the first electric cabinet until the temperature difference between the first electric cabinet and the adjacent electric cabinet is lower than the second boundary value.

[0389] S2805: Determine an electric cabinet whose temperature is greater than a thermal runaway temperature threshold as a thermal runaway electric cabinet, and obtain neighboring electric cabinets within a preset distance from the thermal runaway electric cabinet.

[0390] S2806, generate a third control instruction for the thermal runaway electrical cabinet and the adjacent electrical cabinet, and send the third control instruction to the liquid cooling unit controller, the third control instruction is used to instruct the liquid cooling unit controller to adjust the flow rate of the output coolant of the variable speed water pump corresponding to the thermal runaway electrical cabinet and the adjacent electrical cabinet to the maximum flow rate.

[0391] S2807, when the temperature of each electric cabinet is within the second temperature range, a self-circulation instruction is generated and sent to the liquid cooling unit controller. The self-circulation instruction is used to instruct the liquid cooling unit controller to control the variable speed water pump corresponding to each electric cabinet to output coolant at a preset flow rate.

[0392] S2808, when the value of the operating condition information of the electric cabinet is greater than the first operating condition threshold, generate a fourth control instruction and send the fourth control instruction to the liquid cooling unit controller, the fourth control instruction is used to control the liquid cooling unit controller to control the electric cabinet to output coolant at a maximum flow rate.

[0393] S2809, when the value of the working condition information of the electric cabinet is less than the second working condition threshold, generate a PWM control signal, and send the PWM control signal to the liquid cooling unit controller, the PWM control signal is used to control the liquid cooling unit controller to control the electric cabinet to output coolant.

[0394] S2810, when the electric cabinet is in a non-working state, generate a fifth control instruction and send the fifth control instruction to the liquid cooling unit controller, the fifth control instruction is used to instruct the liquid cooling unit controller to adjust the electric cabinet in a non-working state to a sleep state.

[0395] The non-working state of the electric cabinet includes a fault of the electric cabinet or a non-use of the electric cabinet within a preset time period.

[0396] It should be noted that by controlling the output flow of the variable speed water pump corresponding to each electric cabinet in the above manner, the temperature of the corresponding electric cabinet can be regulated.

[0397] The temperature control method provided in the embodiment of the present application realizes the intelligent joint adjustment of the flow of multiple water pumps in the energy storage system by combining the busbar of the first current collecting device of the liquid cooling unit, multiple variable speed water pumps and the temperature control strategy. In addition to ensuring the uniform temperature of the coolant flowing to each stack liquid cooling plate, the output flow of each driving pump can be regulated according to the temperature difference between the electric cabinets and the actual required cooling capacity or heating capacity of the electric cabinet, so as to realize dynamic temperature control of the electric cabinet and reduce the power consumption of the driving pump, thereby ensuring the safety, reliability and life of the electric cabinet. In addition, different cooling or heating requirements can be matched to each electric cabinet according to different use environments and use ratios.

[0398] Moreover, under extreme boundary conditions, for example, the average temperature difference between cabinets caused by the increase / decrease in ambient temperature, the shady / sunny side of the sun, the windward / leeward side, etc., the flow rate of the higher temperature cabinet can be increased and the flow rate of the low temperature cabinet can be reduced by a variable speed water pump until the temperature difference between cabinets is less than the safety boundary value.

[0399] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0400] Based on the same inventive concept, the embodiment of the present application also provides a temperature control device for implementing the temperature control method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more temperature control device embodiments provided below can refer to the limitations on the temperature control method above, and will not be repeated here.

[0401] In one embodiment, Fig.29As shown, a temperature control device 2900 is provided, which is applied to an energy storage system, the energy storage system includes: a battery management system and an energy storage device; the energy storage device includes a liquid cooling unit and at least one energy storage unit, the liquid cooling unit includes at least one driving pump; each energy storage unit corresponds to a driving pump, the device includes: an information acquisition module 2901 and a flow control module 2902, wherein:

[0402] The information acquisition module 2901 is used to obtain the status information of each energy storage unit in the energy storage device;

[0403] The flow control module 2902 is used to control the flow rate of the coolant output by the driving pump corresponding to each energy storage unit according to the status information of each energy storage unit, so as to adjust the temperature of the corresponding energy storage unit.

[0404] In one embodiment, Fig.30 As shown, the status information includes the temperature of each energy storage unit, and the flow control module 2902 includes:

[0405] The first control unit 3001 controls the flow rate of the coolant output by the driving pump corresponding to each energy storage unit according to the temperature of each energy storage unit.

[0406] In one embodiment, Fig.31 As shown, the first control unit 3001 includes:

[0407] A first determining subunit 3101, configured to determine a first energy storage unit from among the energy storage units according to the temperatures of the energy storage units;

[0408] The first control subunit 3102 is used to control the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit according to the preset first temperature range and the temperature of the first energy storage unit.

[0409] In one embodiment, Fig.32 As shown, the first determining subunit 3101 includes:

[0410] An acquisition subunit 3201 is used to acquire the temperature difference between each adjacent energy storage unit in all energy storage units;

[0411] The second determining subunit 3202 is used to determine the adjacent energy storage units whose temperature difference is greater than the first boundary value as the first energy storage unit.

[0412] In one embodiment, Fig.33 As shown, the first control subunit 3102 includes:

[0413] The second control subunit 3301 is used to control the driving pump corresponding to the first energy storage unit to maintain a current output state when the temperature of the first energy storage unit is within a first temperature range;

[0414] The third control subunit 3302 is used to adjust the flow rate of coolant output by the driving pump corresponding to the first energy storage unit when the temperature of the first energy storage unit is outside the first temperature range, until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value.

[0415] In one embodiment, Fig.34 As shown, the third control subunit 3302 includes:

[0416] A first generating subunit 3401, configured to generate a first flow request when the temperature of the first energy storage unit is greater than a maximum value of a first temperature range;

[0417] The first sending subunit 3402 is used to send a first flow request to a liquid cooling unit controller in the liquid cooling unit; the first flow request is used to instruct the liquid cooling unit controller to increase the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value.

[0418] In one embodiment, Fig.35 As shown, the third control subunit 3302 includes:

[0419] The second generating subunit 3501 is used to generate a second flow request when the temperature of the first energy storage unit is less than the minimum value of the first temperature range;

[0420] The second sending sub-unit 3502 is used to send a second flow request to the liquid cooling unit controller in the liquid cooling unit, and the second flow request is used to instruct the liquid cooling unit controller to reduce the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value.

[0421] In one embodiment, Fig.36 As shown, the first control unit 3001 includes:

[0422] The third determination subunit 3601 is used to determine an energy storage unit whose temperature is greater than a preset thermal runaway temperature threshold as a thermal runaway energy storage unit;

[0423] The fourth control subunit 3602 is used to determine the second energy storage unit according to the thermal runaway energy storage unit, and control the flow rate of the coolant output by the driving pump corresponding to the second energy storage unit.

[0424] In one embodiment, Fig.37 As shown, the fourth control subunit 3602 includes:

[0425] The fourth determining subunit 3701 is used to obtain adjacent energy storage units within a preset distance range from the thermal runaway energy storage unit, and determine the thermal runaway energy storage unit and the adjacent energy storage unit as the second energy storage unit;

[0426] The adjusting subunit 3702 is used to adjust the flow rate of the coolant output by the driving pump corresponding to each second energy storage unit to the maximum flow rate of the driving pump through the liquid cooling unit controller in the liquid cooling unit.

[0427] In one embodiment, Fig.38 As shown, the first control unit 3001 includes:

[0428] The third generating subunit 3801 is used to generate a self-cycle instruction when the temperature of each energy storage unit is within a preset second temperature range;

[0429] The third sending subunit 3802 is used to send the self-circulation instruction to the liquid cooling unit controller in the liquid cooling unit. The self-circulation instruction is used to instruct the liquid cooling unit controller to control the driving pump corresponding to each energy storage unit to output a preset flow of coolant.

[0430] In one embodiment, Fig.39 As shown, the status information includes the operating condition information of the energy storage unit; the flow control module 2902 includes:

[0431] The second control unit 3901 is used to control the flow rate of the coolant output by the driving pump corresponding to any energy storage unit according to the operating condition information of the energy storage unit and a preset operating condition threshold value.

[0432] In one embodiment, Fig.40 As shown, the second control unit 3901 includes:

[0433] The fifth control subunit 4001 is used to control the drive pump corresponding to the energy storage unit to output the coolant at a first flow rate when the value of the operating condition information of the energy storage unit is greater than a preset first operating condition threshold;

[0434] The sixth control subunit 4002 is used to control the drive pump corresponding to the energy storage unit to output the coolant at a second flow rate when the value of the operating condition information of the energy storage unit is less than a preset second operating condition threshold;

[0435] Among them, the first operating condition threshold is greater than the second operating condition threshold, and the first flow rate is greater than the second flow rate.

[0436] In one embodiment, the operating condition information includes the ambient temperature of the energy storage unit and / or the operating multiple of the energy storage unit.

[0437] In one embodiment, Fig.41As shown, the state information also includes the temperature of the energy storage unit, and the sixth control subunit 4002 includes:

[0438] The fourth generating subunit 4101 is used to generate a pulse width modulation signal of the energy storage unit according to the temperature of the energy storage unit when the value of the operating condition information of the energy storage unit is less than the second operating condition threshold;

[0439] The fourth sending subunit is used to send the pulse width modulation signal of the energy storage unit to the liquid cooling unit controller in the liquid cooling unit, and the pulse width modulation signal is used to instruct the liquid cooling unit controller to adjust the drive pump corresponding to the energy storage unit to output coolant at a second flow rate.

[0440] In one embodiment, Fig.42 As shown, the status information includes the operation information of the energy storage unit, and the flow control module 2902 includes:

[0441] A determination unit 4201, configured to determine an energy storage unit in a non-working state among all energy storage units according to operation information of each energy storage unit;

[0442] The third control unit 4202 is used to control the driving pump corresponding to the energy storage unit in the non-working state to be in the dormant state.

[0443] In one embodiment, the energy storage unit in a non-operating state includes a failed energy storage unit and / or an energy storage unit that has not been operated for a preset period of time.

[0444] Each module in the above-mentioned temperature control device can be implemented in whole or in part by software, hardware or a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to each module above.

[0445] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Fig.43As shown. The computer device includes a processor, a memory, an input / output interface (Input / Output, referred to as I / O) and a communication interface. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface is connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The database of the computer device is used to store temperature control data. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal through a network connection. When the computer program is executed by the processor, a temperature control method is implemented.

[0446] Those skilled in the art will understand that Fig.43 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0447] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the technical solution of the temperature control method provided in any of the following embodiments is implemented.

[0448] The above embodiment provides a computer device, whose implementation principle and technical effect are similar to those of the above method embodiment, and will not be repeated here.

[0449] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the technical solution of the temperature control method provided in any of the above embodiments is implemented.

[0450] The above embodiment provides a computer-readable storage medium, whose implementation principle and technical effect are similar to those of the above method embodiment, and will not be repeated here.

[0451] In one embodiment, a computer program product is provided, including a computer program, which, when executed by a processor, implements the technical solution of the temperature control method provided in any of the above embodiments.

[0452] The above embodiment provides a computer program product, whose implementation principle and technical effect are similar to those of the above method embodiment, and will not be repeated here.

[0453] It should be noted that the data involved in this application (including but not limited to data used for analysis, stored data, displayed data, etc.) are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant laws, regulations and standards of relevant countries and regions.

[0454] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0455] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0456] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. An energy storage system, characterized in that: The energy storage system comprises: a battery management system and an energy storage device; the energy storage device comprises a liquid cooling unit and at least one energy storage unit, the liquid cooling unit comprises at least one driving pump; each energy storage unit corresponds to a driving pump; the battery management system is respectively connected to each of the driving pumps; The battery management system is used to control the flow rate of coolant output by the driving pump corresponding to each energy storage unit according to the status information of each energy storage unit, so as to regulate the temperature of the corresponding energy storage unit.

2. The system according to claim 1, characterized in that The liquid cooling unit also includes a temperature regulating device and at least one stack liquid cooling plate; The temperature regulating device, the at least one driving pump and the at least one stack liquid cooling plate are connected in pairs; each driving pump corresponds to one stack liquid cooling plate; each stack liquid cooling plate is placed in contact with one energy storage unit; The temperature regulating device is used to regulate the temperature of the coolant flowing through the temperature regulating device, and the coolant in the temperature regulating device is transported to the corresponding stack liquid cooling plates through each of the driving pumps.

3. The system according to claim 2, characterized in that The temperature regulating device comprises a first current collecting device, at least one temperature regulating component and a second current collecting device, wherein the first current collecting device and the second current collecting device each comprise at least one liquid inlet and at least one liquid outlet; each of the liquid outlets of the first current collecting device is respectively connected to the liquid inlet of each of the driving pumps, and each of the liquid outlets of the driving pumps is respectively connected to the liquid inlet of the second current collecting device through one of the stack liquid cooling plates, and each of the liquid outlets of the second current collecting device is respectively connected to the liquid inlet of the first current collecting device through each of the temperature regulating components; The temperature regulating component is used to regulate the temperature of the coolant that flows from each of the fuel cell stack liquid cooling plates to the second current collecting device, so that the temperature of the coolant entering the first current collecting device is within a preset temperature range.

4. The system according to claim 3, characterized in that The first current collecting device comprises a first liquid storage component, a second liquid storage component and a third liquid storage component connected between the first liquid storage component and the second liquid storage component; Each liquid inlet of the first current collecting device is opened in the first liquid storage component; and each liquid outlet of the first current collecting device is opened in the second liquid storage component.

5. The system according to claim 4, characterized in that The first liquid storage component, the second liquid storage component and the third liquid storage component are all constructed as tubular structures, and the arrangement area of ​​each of the liquid inlets of the first current collecting device on the first liquid storage component is defined as a first tube section, and the arrangement area of ​​each of the liquid outlets of the first current collecting device on the second liquid storage component is defined as a second tube section; The liquid inlet and the liquid outlet of the third liquid storage component are connected to the liquid outlet of the first liquid storage component and the liquid inlet of the second liquid storage component respectively; The liquid outlet of the first liquid storage component is located in the middle of the first tube section; and / or The liquid inlet of the second liquid storage component is located in the middle of the second tube section.

6. The system according to claim 5, characterized in that The second liquid storage component also includes an openable and closable liquid injection port; the liquid injection port is used to communicate with a cooling liquid supply source.

7. The system according to any one of claims 3 to 6, characterized in that: The second current collecting device comprises a fourth liquid storage component, and each of the liquid inlets and each of the liquid outlets of the second current collecting device are disposed in the fourth liquid storage component.

8. The system according to claim 7, characterized in that The fourth liquid storage component is configured as a tubular structure; The arrangement area of ​​the liquid inlets of the second current collecting device on the fourth liquid storage component is defined as a third pipe segment, and the liquid outlets of the second current collecting device are respectively located on both sides of the third pipe segment in the length direction.

9. The system according to any one of claims 3 to 6, characterized in that: The temperature regulating assembly includes a cooling assembly; A portion of the liquid outlets of the second current collecting device are respectively connected to a portion of the liquid inlets of the first current collecting device through the cooling assembly.

10. The system according to claim 9, characterized in that The cooling assembly includes an evaporator, the evaporator includes a first heat exchange channel and a second heat exchange channel, the liquid inlet of the first heat exchange channel is connected to one of the liquid outlets of the second collector, and the liquid outlet of the first heat exchange channel is connected to one of the liquid inlet of the first collector; The second heat exchange channel is used to exchange heat with the cooling liquid in the first heat exchange channel through the refrigerant flowing inside, so as to cool the temperature of the cooling liquid in the first heat exchange channel.

11. The system according to claim 10, characterized in that The cooling assembly also includes a compressor, a condenser, a liquid storage tank and an expansion valve, the liquid outlet of the second heat exchange channel is connected to the first end of the compressor, the second end of the compressor is connected to the first end of the condenser, the second end of the condenser is connected to the first end of the liquid storage tank, the second end of the liquid storage tank is connected to the first end of the expansion valve, and the second end of the expansion valve is connected to the liquid inlet of the second heat exchange channel.

12. The system according to claim 9, characterized in that The temperature adjustment component also includes a heating component that is turned on or off with the cooling component; Another part of the liquid outlets of the second current collecting device is connected to another part of the liquid inlet of the first current collecting device through the heating component.

13. The system according to claim 12, characterized in that The liquid outlet of another part of the second current collecting device is connected to the liquid inlet of another part of the first current collecting device through a heating pipe; The heating component includes a thermistor, and the thermistor is attached to the outer wall of the heating pipe.

14. The system according to any one of claims 1 to 6, characterized in that: The liquid cooling unit also includes a liquid cooling unit controller, and the liquid cooling unit controller is connected to each of the driving pumps respectively; the battery management system is connected to the liquid cooling unit controller; The battery management system is further used to determine the flow adjustment strategy of each energy storage unit according to the status information of each energy storage unit; The liquid cooling unit controller is used to control the flow rate of the coolant output by the driving pump corresponding to each energy storage unit according to each flow adjustment strategy.

15. A temperature control method, characterized in that: Applied to an energy storage system, the energy storage system comprises: a battery management system and an energy storage device; the energy storage device comprises a liquid cooling unit and at least one energy storage unit, the liquid cooling unit comprises at least one driving pump; each energy storage unit corresponds to a driving pump, the method comprises: Obtaining status information of each energy storage unit in the energy storage device; According to the status information of each energy storage unit, the flow rate of the coolant output by the driving pump corresponding to each energy storage unit is controlled to adjust the temperature of the corresponding energy storage unit.

16. The method according to claim 15, characterized in that The state information includes the temperature of each of the energy storage units, and controlling the flow rate of the coolant output by the drive pump corresponding to each of the energy storage units according to the state information of each of the energy storage units includes: According to the temperature of each energy storage unit, the flow rate of the coolant output by the driving pump corresponding to each energy storage unit is controlled.

17. The method according to claim 16, characterized in that According to the temperature of each energy storage unit, controlling the flow rate of the coolant output by the driving pump corresponding to each energy storage unit includes: Determining a first energy storage unit from among the energy storage units according to the temperature of each of the energy storage units; According to a preset first temperature range and the temperature of the first energy storage unit, the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit is controlled.

18. The method according to claim 17, characterized in that The step of determining the first energy storage unit from the energy storage units according to the temperature of each of the energy storage units comprises: Obtaining the temperature difference between each adjacent energy storage unit in all energy storage units; An adjacent energy storage cell having a temperature difference greater than a first limit value is determined as the first energy storage cell.

19. The method according to claim 17 or 18, characterized in that The step of controlling the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit according to the preset first temperature range and the temperature of the first energy storage unit comprises: When the temperature of the first energy storage unit is within the first temperature range, controlling the driving pump corresponding to the first energy storage unit to maintain a current output state; When the temperature of the first energy storage unit is outside the first temperature range, the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit is adjusted until the temperature difference between the first energy storage unit and an adjacent energy storage unit is less than a second boundary value.

20. The method according to claim 19, characterized in that When the temperature of the first energy storage unit is outside the first temperature range, adjusting the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and an adjacent energy storage unit is less than a second boundary value, comprises: generating a first flow request when the temperature of the first energy storage unit is greater than a maximum value of the first temperature range; The first flow request is sent to a liquid cooling unit controller in the liquid cooling unit; the first flow request is used to instruct the liquid cooling unit controller to increase the flow rate of coolant output by the drive pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value.

21. The method according to claim 19, characterized in that When the temperature of the first energy storage unit is outside the first temperature range, adjusting the flow rate of the coolant output by the driving pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and an adjacent energy storage unit is less than a second boundary value, comprises: generating a second flow request when the temperature of the first energy storage unit is less than a minimum value of the first temperature range; The second flow request is sent to a liquid cooling unit controller in the liquid cooling unit, and the second flow request is used to instruct the liquid cooling unit controller to reduce the flow rate of coolant output by the drive pump corresponding to the first energy storage unit until the temperature difference between the first energy storage unit and the adjacent energy storage unit is less than the second boundary value.

22. The method according to any one of claims 16 to 18, characterized in that: According to the temperature of each energy storage unit, controlling the flow rate of the coolant output by the driving pump corresponding to each energy storage unit includes: Determine an energy storage unit whose temperature is greater than a preset thermal runaway temperature threshold as a thermal runaway energy storage unit; A second energy storage unit is determined according to the thermal runaway energy storage unit, and the flow rate of the coolant output by the driving pump corresponding to the second energy storage unit is controlled.

23. The method according to claim 22, characterized in that The determining of the second energy storage unit according to the thermal runaway energy storage unit, and controlling the flow rate of the coolant output by the driving pump corresponding to the second energy storage unit, includes: Acquire adjacent energy storage units within a preset distance range from the thermal runaway energy storage unit, and determine the thermal runaway energy storage unit and the adjacent energy storage units as the second energy storage unit; The flow rate of the coolant output by the driving pump corresponding to each second energy storage unit is adjusted to the maximum flow rate of the driving pump through the liquid cooling unit controller in the liquid cooling unit.

24. The method according to any one of claims 16 to 18, characterized in that: According to the temperature of each energy storage unit, controlling the flow rate of the coolant output by the driving pump corresponding to each energy storage unit includes: When the temperature of each of the energy storage units is within a preset second temperature range, generating a self-circulation instruction; The self-circulation instruction is sent to a liquid cooling unit controller in the liquid cooling unit, and the self-circulation instruction is used to instruct the liquid cooling unit controller to control the driving pump corresponding to each energy storage unit to output a preset flow of coolant.

25. The method according to any one of claims 15 to 18, characterized in that: The state information includes the working condition information of the energy storage unit; and controlling the flow rate of the coolant output by the driving pump corresponding to each energy storage unit according to the state information of each energy storage unit includes: For any energy storage unit, the flow rate of the coolant output by the driving pump corresponding to the energy storage unit is controlled according to the operating condition information of the energy storage unit and a preset operating condition threshold.

26. The method according to claim 25, characterized in that The step of controlling the flow rate of the coolant output by the driving pump corresponding to the energy storage unit according to the operating condition information of the energy storage unit and the preset operating condition threshold value comprises: When the value of the operating condition information of the energy storage unit is greater than a preset first operating condition threshold, controlling a drive pump corresponding to the energy storage unit to output coolant at a first flow rate; When the value of the operating condition information of the energy storage unit is less than a preset second operating condition threshold, controlling the drive pump corresponding to the energy storage unit to output the coolant at a second flow rate; Among them, the first operating condition threshold is greater than the second operating condition threshold, and the first flow rate is greater than the second flow rate.

27. The method according to claim 26, characterized in that The operating condition information includes the ambient temperature of the energy storage unit and / or the operating multiple of the energy storage unit.

28. The method according to claim 26, characterized in that The state information also includes the temperature of the energy storage unit. When the value of the operating condition information of the energy storage unit is less than a preset second operating condition threshold, controlling the drive pump corresponding to the energy storage unit to output the coolant at a second flow rate includes: When the value of the operating condition information of the energy storage unit is less than the second operating condition threshold, generating a pulse width modulation signal of the energy storage unit according to the temperature of the energy storage unit; The pulse width modulation signal of the energy storage unit is sent to a liquid cooling unit controller in the liquid cooling unit, and the pulse width modulation signal is used to instruct the liquid cooling unit controller to adjust the drive pump corresponding to the energy storage unit to output the coolant at the second flow rate.

29. The method according to any one of claims 15 to 18, characterized in that: The state information includes operation information of the energy storage unit, and controlling the flow rate of the coolant output by the drive pump corresponding to each energy storage unit according to the state information of each energy storage unit includes: Determining an energy storage unit that is in a non-working state among all the energy storage units according to the operation information of each of the energy storage units; The driving pump corresponding to the energy storage unit in the non-working state is controlled to be in a dormant state.

30. The method according to claim 29, characterized in that The energy storage unit in a non-operating state includes a failed energy storage unit and / or an energy storage unit that has not been operated for a preset period of time.

31. A temperature control device, characterized in that: Applied to an energy storage system, the energy storage system comprises: a battery management system and an energy storage device; the energy storage device comprises a liquid cooling unit and at least one energy storage unit, the liquid cooling unit comprises at least one driving pump; each energy storage unit corresponds to a driving pump, and the device comprises: An information acquisition module, used to obtain status information of each energy storage unit in the energy storage device; The flow control module is used to control the flow rate of the coolant output by the driving pump corresponding to each energy storage unit according to the status information of each energy storage unit, so as to adjust the temperature of the corresponding energy storage unit.

32. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 15 to 30 are implemented.

33. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 15 to 30 are implemented.

34. A computer program product comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 15 to 30 are implemented.

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