Energy storage liquid cooling unit power supply control device and energy storage liquid cooling equipment

Abstract

The utility model relates to an energy storage liquid cooling unit power supply control device and energy storage liquid cooling equipment, the energy storage liquid cooling unit power supply control device comprises a power supply module, a control module and an isolation communication module, the power supply module is connected with an external power supply and a load in an energy storage liquid cooling unit, and the control module is connected with the power supply module and the isolation communication module. The isolation communication module is connected with an upper computer; and the control module sends a starting instruction to the power supply module after receiving a refrigeration command issued by the upper computer through the isolation communication module, so that the power supply module supplies power to the load. It can be seen that the control module communicates with the upper computer through the isolation communication module, electromagnetic interference can be effectively reduced, and the anti-interference capacity of power supply communication is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage liquid cooling control, in particular to an energy storage liquid cooling unit power supply control device and an energy storage liquid cooling equipment. BACKGROUND

[0002] With the continuous development and progress of energy storage technology, the installed capacity of energy storage is increasing, and the capacity and power of energy storage battery system single body are also rapidly increasing. High power density requires higher heat dissipation, and the internal battery of the energy storage battery system is prone to produce uneven heat and temperature distribution, and the safety hazard is also increasing.

[0003] The energy storage liquid cooling unit has stronger heat dissipation function than the air-cooled product, and is more matched with the large-capacity trend of the energy storage power station, so the market size of the energy storage liquid cooling temperature control technology also increases. In the process of realizing the present application, the inventors found that at least the following problems exist in the prior art: The power supply of the energy storage liquid cooling unit is mainly derived from the PCS (energy storage converter) AC side, and the electromagnetic interference to the energy storage liquid cooling unit is very strong. Therefore, how to improve the anti-interference ability of the power supply communication of the energy storage liquid cooling unit is a problem to be solved. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide an energy storage liquid cooling unit power supply control device and an energy storage liquid cooling equipment which can improve the anti-interference ability of power supply communication in view of the above problems.

[0005] The first aspect of the present application provides an energy storage liquid cooling unit power supply control device, comprising a power supply module, a control module and an isolation communication module, the power supply module is connected with an external power supply and a load in an energy storage liquid cooling unit, the control module is connected with the power supply module and the isolation communication module, and the isolation communication module is connected with an upper computer; after the control module receives a refrigeration command issued by the upper computer through the isolation communication module, a start instruction is sent to the power supply module, so that the power supply module supplies power to the load.

[0006] In one embodiment, the isolation communication module is a 485 isolation board.

[0007] In one embodiment, the power supply module comprises a frequency converter connected with the control module, and the frequency converter outputs the frequency-converted AC power to the load for power supply after receiving the start instruction.

[0008] In one embodiment, the power supply module further comprises a filter connected with the frequency converter, and the filter transmits the filtered AC power to the frequency converter.

[0009] In one embodiment, the power supply module further comprises a circuit breaker connected with the external power supply and the filter.

[0010] In one of the embodiments, the filter comprises an input end L1, an input end L2, an input end L3, an output end L1', an output end L2', an output end L3' and filter elements, the input end L1 is connected to the output end L1' through the corresponding filter element, the input end L2 is connected to the output end L2' through the corresponding filter element, the input end L3 is connected to the output end L3' through the corresponding filter element, the input end L1, the input end L2 and the input end L3 are connected to the circuit breaker, the output end L1', the output end L2' and the output end L3' are connected to the frequency converter; when the circuit breaker is turned on, three-phase alternating current is accessed to the filter.

[0011] In one of the embodiments, the circuit breaker is an air switch.

[0012] In one of the embodiments, the filter is an LC filter.

[0013] The second aspect of the present application provides an energy storage liquid cooling device, comprising an energy storage liquid cooling unit, a host computer and the energy storage liquid cooling unit power supply control device described above.

[0014] In one of the embodiments, the energy storage liquid cooling unit is used for refrigerating the battery cell, and the host computer is a battery management system.

[0015] Compared with the prior art, the technical scheme provided by the present application has at least the following beneficial effects:

[0016] The energy storage liquid cooling unit power supply control device and the energy storage liquid cooling device described above, after the control module receives the refrigeration command issued by the host computer through the isolation communication module, sends a start instruction to the power supply module, so that the power supply module supplies power to the load. The control module communicates with the host computer through the isolation communication module, which can effectively reduce electromagnetic interference and improve the anti-interference ability of power supply communication. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The structural block diagram of the energy storage liquid cooling unit power supply control device in one of the embodiments;

[0018] Figure 2 The structural schematic diagram of the energy storage liquid cooling unit power supply control device in one of the embodiments. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the present application clearer, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application.

[0021] It can be understood that, in the following embodiments, “connection” should be understood as “electrical connection”, “communication connection” and the like if the circuits, modules, units and the like connected with each other have the transmission of electrical signals or data.

[0022] As used herein, the singular forms “a”, “an” and “the” include plural referents unless the context clearly dictates otherwise. It should also be understood that the term “including” or “containing” or “having” or “with” or “comprising” or the like means the presence of stated features, integers, operations, components, parts, or combinations thereof, but does not preclude the presence or addition of one or more other features, integers, operations, components, parts, or combinations thereof.

[0023] In one embodiment, as shown in Figure 1 A power supply control device for an energy storage liquid cooling unit is provided, which includes a power supply module 110, a control module 120 and an isolated communication module 130. The power supply module 110 is connected to an external power supply and a load in the energy storage liquid cooling unit. The control module 120 is connected to the power supply module 110 and the isolated communication module 130. The isolated communication module 130 is connected to an upper computer. After receiving a refrigeration command issued by the upper computer through the isolated communication module 130, the control module 120 sends a start instruction to the power supply module 110, so that the power supply module 110 supplies power to the load.

[0024] The external power supply can be an alternating current power supply or a direct current power supply, for example, the power supply module 110 can be connected to the alternating current side of the energy storage converter to access alternating current. The load in the energy storage liquid cooling unit can be a compressor, a water pump, a fan and the like. The upper computer can be, but is not limited to, various personal computers, notebook computers, smart phones, tablet computers, Internet of Things devices, portable wearable devices and the like control terminals. It can be understood that the type of upper computer will also be different according to the application scene of the energy storage liquid cooling unit. The control module 120 can be a master control device such as an FPGA (Field Programmable Gate Array), an MCU (Microcontroller Unit) and a CPU (Central Processing Unit). When the upper computer determines that the energy storage liquid cooling unit needs to be started to cool, it sends a cooling command to the control module 120 through the isolation communication module 130. After receiving the cooling command, the control module 120 sends a start instruction to the power supply module 110. After receiving the start instruction, the power supply module 110 can filter, frequency convert and the like to the accessed alternating current / direct current, and output alternating current / direct current to the load for power supply. Whether the power supply module 110 outputs alternating current or direct current can also be set according to the type of load. The type of isolation communication module 130 is also not unique, and a 485 isolation board or other communication boards with isolation function can be selected. In the embodiment, the isolation communication module 130 is a 485 isolation board, which can enhance the common mode interference immunity of the strong current end and the ground, and the overvoltage immunity in communication with the upper computer. The isolation withstand voltage level can reach 4525VDC. Because the 485 isolation board is a separate finished product board, it can be selected and matched according to the anti-interference requirements of the whole machine communication end, so as to meet the current anti-interference protection level of the communication end on the market. In addition, the 485 isolation board is small in size, light in weight and convenient to maintain, and can be selected and used according to the application scene of the energy storage liquid cooling unit, and can be quickly replaced when damaged.

[0025] The energy storage liquid cooling unit can be used to cool the battery cell or other energy storage elements, and heat dissipation is performed on the energy storage elements to maintain stable temperature. Taking the energy storage liquid cooling unit used for cooling the battery cell as an example, the upper computer can be a battery management system (BMS). When the energy storage liquid cooling unit is running, the battery management system establishes communication with the energy storage liquid cooling unit. When the battery management system detects that the temperature of the battery cell reaches the cooling requirement, it establishes communication with the control module 120 through the 485 isolation board and the control module 120, and sends a cooling command to the control module 120 to control the power supply module 110 to supply power to the energy storage liquid cooling unit, so as to start the energy storage liquid cooling unit to cool the battery cell.

[0026] The specific structure of the power supply module 110 is not unique. In one embodiment, as shown in Figure 2As shown, the power supply module 110 includes a frequency converter 112 connected to the control module 120, which converts the incoming AC power and outputs it to the load for power supply after receiving the start command. Further, the power supply module 110 also includes a filter 114 connected to the frequency converter 112, which filters the incoming AC power and delivers it to the frequency converter 112. Among them, the filter 114 can be an LC (inductance and capacitance) filter, which filters the AC power and outputs it to the frequency converter 112, reduces the interference of spurs, and improves the stability of power supply. In addition, the power supply module 110 can also include a circuit breaker K connected to the external power supply and the filter 114. The circuit breaker K can be an air switch, which automatically disconnects when the incoming current exceeds the rated current, ensuring the safety of power supply.

[0027] As shown in Figure 2 The filter 114 includes an input end L1, an input end L2, an input end L3, an output end L1', an output end L2', an output end L3', and a filter element. The input end L1 is connected to the output end L1' through the corresponding filter element, the input end L2 is connected to the output end L2' through the corresponding filter element, and the input end L3 is connected to the output end L3' through the corresponding filter element. The input end L1, the input end L2, and the input end L3 are connected to the circuit breaker K, and the output end L1', the output end L2', and the output end L3' are connected to the frequency converter 112. When the circuit breaker K is turned on, three-phase AC power is connected to the filter 114. Among them, the filter element is specifically an LC component, one end of the inductor in the LC component is connected to the corresponding input end and grounded through the capacitor, and the other end of the inductor is connected to the corresponding output end. By setting filter elements on each line for filtering, the interference of spurs can be further reduced.

[0028] Specifically, also taking the energy storage liquid cooling unit for cooling the battery cell as an example, the air switch is closed, and when the energy storage liquid cooling unit is running, the battery management system establishes communication with the energy storage liquid cooling unit. When the temperature of the battery cell reaches the cooling requirement of the energy storage water machine, the energy storage liquid cooling unit establishes communication through the 485 isolation board control module 120 and issues a cooling command. At the same time, the battery management system can also monitor the working state and running data of the control module 120. When the energy storage liquid cooling unit is used in energy storage converter power supply or other unstable power supply, or when the energy storage liquid cooling unit requires strong power input to strengthen the insulation of the communication port of the control module 120 to 4525VDC safety voltage resistance, or when the communication port of the whole machine is tested for EMS (electromagnetic sensitivity) immunity (including EFT-fast transient impulse immunity, Surge-lightning surge immunity), the 485 isolation board can enhance the anti-interference and anti-overvoltage capability of the communication between the control module 120 and the battery management system.

[0029] In the above energy storage liquid cooling unit power supply control device, the 485 isolation board plays a role of communication switching. In the communication process, the communication port of the control module 120 and the 485 isolation board can resist EMS interference and overvoltage interference up to 4525VDC, which is much higher than the anti-interference ability of ordinary communication ports, and can improve the anti-interference and anti-overvoltage problems in the communication process, meet the safety voltage of the whole machine strong electricity input end to the communication end, prevent the communication port from being damaged due to interference problems, and avoid causing communication abnormalities of the battery management system and the energy storage liquid cooling unit.

[0030] In one embodiment, an energy storage liquid cooling device is also provided, comprising an energy storage liquid cooling unit, a host computer and the above energy storage liquid cooling unit power supply control device. The energy storage liquid cooling unit is used for refrigerating the battery cell, and the host computer is a battery management system. The energy storage liquid cooling device can further comprise a temperature sensor arranged on the battery cell, and the battery management system is connected to the temperature sensor to analyze whether the temperature of the battery cell reaches the refrigeration requirement according to the temperature detected by the temperature sensor. In addition, the battery management system is also used for monitoring the working state and running data of the energy storage liquid cooling unit.

[0031] The technical features of the above embodiments can be combined arbitrarily. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0032] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as the limitation of the scope of the utility model patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, some modifications and improvements can be made, which belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A power supply control device for an energy storage liquid-cooled unit, characterized in that, It includes a power supply module, a control module, and an isolation communication module. The power supply module is connected to an external power source and the load in the energy storage liquid cooling unit. The control module is connected to the power supply module and the isolation communication module, and the isolation communication module is connected to a host computer. After receiving a cooling command from the host computer through the isolation communication module, the control module sends a start command to the power supply module, so that the power supply module supplies power to the load.

2. The apparatus according to claim 1, characterized in that, The isolated communication module is a 485 isolation board.

3. The apparatus according to claim 1, characterized in that, The power supply module includes a frequency converter connected to the control module. After receiving the start command, the frequency converter converts the incoming AC power and outputs it to the load for power supply.

4. The apparatus according to claim 3, characterized in that, The power supply module also includes a filter connected to the frequency converter, which filters the incoming AC power before sending it to the frequency converter.

5. The apparatus according to claim 4, characterized in that, The power supply module also includes a circuit breaker, which is connected to an external power source and the filter.

6. The apparatus according to claim 5, characterized in that, The filter includes input terminals L1, L2, and L3, output terminals L1', L2', and L3', and filtering elements. Input terminal L1 is connected to output terminal L1' through the corresponding filtering element, input terminal L2 is connected to output terminal L2' through the corresponding filtering element, and input terminal L3 is connected to output terminal L3' through the corresponding filtering element. Input terminals L1, L2, and L3 are connected to the circuit breaker, and output terminals L1', L2', and L3' are connected to the frequency converter. When the circuit breaker is on, three-phase AC power is supplied to the filter.

7. The apparatus according to claim 5, characterized in that, The circuit breaker is an air switch.

8. The apparatus according to claim 4, characterized in that, The filter is an LC filter.

9. An energy storage liquid cooling device, characterized in that, It includes an energy storage liquid cooling unit, a host computer, and a power supply control device for the energy storage liquid cooling unit as described in any one of claims 1-8.

10. The energy storage liquid cooling device according to claim 9, characterized in that, The energy storage liquid cooling unit is used to cool the battery cells, and the host computer is a battery management system.

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