Intelligent temperature control method, device and server for energy storage cells of new energy vehicles

Abstract

The present invention provides an intelligent temperature control method, device and server for energy storage cells of new energy vehicles, which relates to the field of energy storage technology for new energy vehicles, including: obtaining a cell temperature set, and the highest cell temperature and the lowest cell temperature in the cell temperature set; switching the temperature control mode according to the highest cell temperature and the lowest cell temperature, so as to perform temperature control and adjustment processing on the entire energy storage cells; when it is detected that the temperature of each energy storage cell rises to a preset minimum temperature threshold in the heating mode, or drops to a preset maximum temperature threshold in the cooling mode, the water-cooled self-circulation mode is turned on, and the solenoid valve gear corresponding to each energy storage cell is adjusted according to the inlet and outlet water temperature of the water cooling unit and the temperature of each energy storage cell, so as to correct the temperature difference between each energy storage cell to within the preset temperature difference threshold range. The present invention can correct the temperature difference between energy storage cells of new energy vehicles, thereby significantly improving the accuracy of intelligent temperature control.

Description

Technical Field

[0001] The present invention relates to the field of new energy vehicle energy storage technology, and in particular to an intelligent temperature control method, device and server for a new energy vehicle energy storage cell. Background Art

[0002] The battery pack is the core component of new energy vehicles and is mainly used to provide power for new energy vehicles. The battery cells in the battery pack will heat up significantly during the driving of new energy vehicles. Excessive cell temperature will affect battery efficiency and service life. When driving in a cold environment, too low cell temperature will affect the normal driving of the vehicle and increase energy consumption. Therefore, with the continuous development of the new energy vehicle industry, it is crucial to accurately control the battery cell temperature within a reasonable range.

[0003] At present, relevant technologies have proposed that water cooling pipes or water cooling plates can be set around the battery pack, and the battery pack can be temperature-controlled by adjusting the water temperature in the water cooling pipes or water cooling plates. However, the temperatures of each battery cell in new energy vehicles are not the same. This solution cannot accurately control the temperature of each battery cell, nor can it correct the temperature difference between the battery cells. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide an intelligent temperature control method, device and server for energy storage cells of new energy vehicles, which can correct the temperature difference between energy storage cells of new energy vehicles, thereby significantly improving the accuracy of intelligent temperature control.

[0005] In a first aspect, an embodiment of the present invention provides an intelligent temperature control method for energy storage cells of new energy vehicles, the method comprising: obtaining a cell temperature set corresponding to multiple energy storage cells in the new energy vehicle, and a maximum cell temperature and a minimum cell temperature in the cell temperature set; switching a temperature control mode according to the maximum cell temperature and the minimum cell temperature to perform temperature control and adjustment processing on each energy storage cell as a whole, wherein the temperature control mode comprises: a heating mode and a cooling mode; when it is detected that each energy storage cell is heated to a preset minimum temperature threshold in the heating mode, or is cooled to a preset maximum temperature threshold in the cooling mode, a water cooling self-circulation mode is turned on, and according to the inlet and outlet water temperatures of the water cooling unit and the temperatures of each energy storage cell, the gear positions of the solenoid valves corresponding to each energy storage cell are adjusted respectively, so as to correct the temperature difference between each energy storage cell to within the preset temperature difference threshold range.

[0006] In one embodiment, the temperature control mode is switched according to the maximum battery cell temperature and the minimum battery cell temperature to perform temperature control and adjustment processing on each energy storage battery cell as a whole, including: when the minimum battery cell temperature is less than 10 degrees Celsius, the heating mode is turned on; when the minimum battery cell temperature is not less than 10 degrees Celsius and the maximum battery cell temperature is less than 30 degrees Celsius, it is determined that the energy storage system is operating normally; when the minimum battery cell temperature is not less than 10 degrees Celsius and the maximum battery cell temperature is not less than 30 degrees Celsius, the cooling mode is turned on.

[0007] In one embodiment, after the step of starting the heating mode, it includes: heating the energy storage cell when entering the heating mode, and if the lowest cell temperature is not less than a preset lowest temperature threshold, entering the water cooling self-circulation mode.

[0008] In one embodiment, after the step of starting the cooling mode, the method includes: cooling the energy storage cells when entering the cooling mode, and if the maximum cell temperature is not greater than a preset maximum temperature threshold, entering a water cooling self-circulation mode.

[0009] In one embodiment, according to the inlet and outlet water temperatures of the water cooling unit and the temperatures of the energy storage cells, the steps of adjusting the gear positions of the solenoid valves corresponding to the energy storage cells respectively include: if the difference between the inlet and outlet water temperatures of the water cooling unit is greater than 2 degrees Celsius, the solenoid valves corresponding to the energy storage cells are all switched to gear 1, wherein gear 1 is a high flow rate gear of the solenoid valve.

[0010] In one embodiment, the method includes: if the difference between the inlet water temperature and the outlet water temperature of the water cooling unit is not greater than 2 degrees Celsius, the temperature of each energy storage cell is detected respectively; when the temperature of any energy storage cell is not less than 28 degrees Celsius and less than 30 degrees Celsius, the solenoid valve corresponding to the energy storage cell is switched to gear 2, wherein gear 2 is a low flow rate gear of the solenoid valve; when the temperature of any energy storage cell is not less than 30 degrees Celsius, the solenoid valve corresponding to the energy storage cell is switched to gear 1.

[0011] In one embodiment, before the step of respectively detecting the temperature of each energy storage cell, the method includes: obtaining the average temperature of each energy storage cell; when the temperature of any energy storage cell is higher than the average temperature, switching the solenoid valve corresponding to the energy storage cell to gear 1, and during this round of water-cooling self-circulation, the gear position of the solenoid valve remains unchanged; when the temperature of any energy storage cell is not higher than the average temperature, switching the solenoid valve corresponding to the energy storage cell to gear 2, and during this round of water-cooling self-circulation, the gear position of the solenoid valve remains unchanged.

[0012] In one embodiment, before the step of detecting the temperature of each energy storage cell respectively, it also includes: sorting the energy storage cells in order of temperature from high to low, and keeping the gear position of the solenoid valve corresponding to the energy storage cell with the highest temperature unchanged at gear 1 during this round of water cooling self-circulation.

[0013] In one embodiment, after the step of adjusting the gear position of the solenoid valve corresponding to each energy storage cell according to the inlet and outlet water temperatures of the water cooling unit and the temperature of each energy storage cell, the method includes: when the water cooling self-circulation mode is turned on for a preset time interval, detecting the temperature difference between each energy storage cell; if the temperature difference is not within the preset temperature difference threshold range, re-starting the next round of water cooling self-circulation; if the temperature difference is within the preset temperature difference threshold range, turning off the cooling mode or the heating mode, and switching the solenoid valve corresponding to each energy storage cell to gear 0 to close the solenoid valve.

[0014] In a second aspect, an embodiment of the present invention further provides an intelligent temperature control device for energy storage cells of new energy vehicles, the device comprising: a temperature acquisition module, for acquiring a cell temperature set corresponding to multiple energy storage cells in the new energy vehicle, and a maximum cell temperature and a minimum cell temperature in the cell temperature set; a temperature control and adjustment module, for switching the temperature control mode according to the maximum cell temperature and the minimum cell temperature, so as to perform temperature control and adjustment processing on each energy storage cell as a whole, wherein the temperature control mode comprises: a heating mode and a cooling mode; a temperature difference correction module, for starting a water-cooled self-circulation mode when it is detected that each energy storage cell is heated to a preset minimum temperature threshold in the heating mode, or is cooled to a preset maximum temperature threshold in the cooling mode, and for performing gear adjustment processing on the solenoid valve gear corresponding to each energy storage cell according to the inlet and outlet water temperatures of the water cooling unit and the temperatures of each energy storage cell, so as to correct the temperature difference between each energy storage cell to within the preset temperature difference threshold range.

[0015] In a third aspect, an embodiment of the present invention further provides a server, comprising a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement any one of the methods provided in the first aspect.

[0016] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement any one of the methods provided in the first aspect.

[0017] The embodiments of the present invention bring the following beneficial effects:

[0018] An embodiment of the present invention provides an intelligent temperature control method, device and server for energy storage cells of new energy vehicles. After obtaining a cell temperature set corresponding to multiple energy storage cells in a new energy vehicle, as well as the highest cell temperature and the lowest cell temperature in the cell temperature set, the method switches the temperature control mode according to the highest cell temperature and the lowest cell temperature, so as to perform temperature control and adjustment processing on each energy storage cell as a whole, and when it is detected that each energy storage cell is heated to a preset minimum temperature threshold in a heating mode, or cooled to a preset maximum temperature threshold in a cooling mode, the water cooling self-circulation mode is turned on, and the gear position of the solenoid valve corresponding to each energy storage cell is adjusted according to the inlet and outlet water temperatures of the water cooling unit and the temperature of each energy storage cell, so as to correct the temperature difference between each energy storage cell to within the preset temperature difference threshold range. The embodiment of the present invention can reduce the conversion efficiency and operating power of the energy storage system, adjust the temperature of each cell by controlling the flow of each battery pack, thereby correcting the system temperature difference, and accurately control each battery pack, thereby optimizing the cooling and heating time.

[0019] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description, claims and drawings.

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 A schematic flow chart of an intelligent temperature control method for energy storage cells of new energy vehicles provided by an embodiment of the present invention;

[0023] Figure 2 A schematic diagram of a specific process of an intelligent temperature control method for energy storage cells of new energy vehicles provided by an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of the structure of a water cooling unit provided by an embodiment of the present invention;

[0025] Figure 4A schematic structural diagram of an intelligent temperature control device for energy storage cells of new energy vehicles provided by an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of the structure of a server provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described in combination with the embodiments below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] At present, the battery pack is the core component of new energy vehicles, which is mainly used to provide power for new energy vehicles. The battery cells in the battery pack will significantly heat up during the driving of new energy vehicles. If the battery cell temperature is too high, it will affect the battery efficiency and service life. When driving in a cold environment, if the battery cell temperature is too low, it will affect the normal driving of the vehicle and increase energy consumption. Therefore, with the continuous development of the new energy vehicle industry, how to accurately control the battery cell temperature within a reasonable range is crucial. The relevant technology proposes that a water cooling pipe or a water cooling plate can be set around the battery pack, and the battery pack can be temperature-controlled by adjusting the water temperature in the water cooling pipe or the water cooling plate. However, the temperature of each battery cell of the new energy vehicle is not the same. This solution cannot accurately control the temperature of each battery cell, nor can it correct the temperature difference between each battery cell. Based on this, the intelligent temperature control method, device and server of the energy storage battery cell of the new energy vehicle provided by the present invention can reduce the conversion efficiency and operating power of the energy storage system, adjust the temperature of each battery cell by controlling the flow of each battery pack, thereby correcting the system temperature difference, and accurately control each battery pack, thereby optimizing the cooling and heating time.

[0029] The embodiment of the present invention introduces in detail the intelligent temperature control method of the energy storage battery of the new energy vehicle, see Figure 1 The flowchart of a method for intelligent temperature control of energy storage cells of new energy vehicles shown in FIG. 1 mainly includes the following steps S102 to S106:

[0030] Step S102, obtaining a set of cell temperatures corresponding to multiple energy storage cells in the new energy vehicle, as well as the highest cell temperature and the lowest cell temperature in the set of cell temperatures. In one embodiment, the temperature of each cell can be collected from the control board, and the working state can be controlled according to the BMS request current. For example, when the temperature is lower than 10 degrees Celsius, the requested current is 0 and the system does not work.

[0031] Step S104, according to the highest cell temperature and the lowest cell temperature, the temperature control mode is switched to perform temperature control and regulation on the energy storage cells as a whole, wherein the temperature control mode includes: a heating mode and a cooling mode. In one embodiment, before entering the water-cooled self-circulation regulation, it is necessary to switch the heating mode and the cooling mode to perform temperature control and regulation. For details, see (1) to (3) below:

[0032] (1) When the minimum cell temperature is less than 10 degrees Celsius, the heating mode is turned on. When entering the heating mode, the energy storage cell is heated. If the minimum cell temperature is not less than the preset minimum temperature threshold, the water cooling self-circulation mode is entered.

[0033] (2) When the minimum battery cell temperature is not less than 10 degrees Celsius and the maximum battery cell temperature is less than 30 degrees Celsius, the energy storage system is determined to be operating normally.

[0034] (3) When the minimum cell temperature is not less than 10 degrees Celsius and the maximum cell temperature is not less than 30 degrees Celsius, the cooling mode is turned on. When entering the cooling mode, the energy storage cell is cooled. If the maximum cell temperature is not greater than the preset maximum temperature threshold, the water cooling self-circulation mode is entered.

[0035] Step S106, when it is detected that each energy storage cell is heated to a preset minimum temperature threshold in the heating mode, or is cooled to a preset maximum temperature threshold in the cooling mode, the water cooling self-circulation mode is turned on, and the solenoid valve gear corresponding to each energy storage cell is adjusted according to the inlet and outlet water temperatures of the water cooling unit and the temperature of each energy storage cell, so as to correct the temperature difference between each energy storage cell to within the preset temperature difference threshold range, wherein the preset temperature difference threshold range between each energy storage cell can be set to a temperature difference of no more than 5 degrees Celsius. In one embodiment, when a high voltage fault, a communication fault, or a detection fault is detected, it is necessary to control the water cooling unit to shut down and upload the fault information. In another embodiment, each temperature threshold in the control strategy can be set according to historical training data or actual usage, but the BMS water cooling strategy has the highest priority. If a conflict occurs when setting the threshold, the BMS water cooling strategy is executed.

[0036] The intelligent temperature control method of the energy storage cells of the new energy vehicle provided in the embodiment of the present invention can correct the temperature difference between the energy storage cells of the new energy vehicle, thereby significantly improving the accuracy of the intelligent temperature control.

[0037] See also Figure 2 A specific flow chart of an intelligent temperature control method for energy storage cells of new energy vehicles is shown, and Figure 3 The structural diagram of a water cooling unit shown in the figure, the embodiment of the present invention also provides an implementation method of intelligent temperature control of energy storage cells, see the following (A) to (C) for details:

[0038] (A) If the difference between the inlet and outlet water temperatures of the water-cooling unit is greater than 2 degrees Celsius, the solenoid valves corresponding to each energy storage cell will be switched to gear 1, where gear 1 is the high flow rate gear of the solenoid valve. In other words, the inlet and outlet water temperatures of the water-cooling unit are judged. When the inlet water temperature - outlet water temperature is greater than 2 degrees Celsius, all the solenoid valves are placed in gear 1.

[0039] (B) If the difference between the inlet and outlet water temperatures of the water cooling unit is not greater than 2 degrees Celsius, the temperature of each energy storage cell is tested respectively. The specific testing steps include the following (a) to (c):

[0040] (a) Sort the energy storage cells in descending order of temperature, and keep the solenoid valve corresponding to the energy storage cell with the highest temperature at gear 1 during this round of water cooling self-circulation. In other words, the solenoid valve of the battery pack with the highest temperature is always at gear 1 regardless of whether its battery pack temperature is lower than the average temperature.

[0041] (b) Obtaining the average temperature of each energy storage cell: When the temperature of any energy storage cell is higher than the average temperature, the solenoid valve corresponding to the energy storage cell is switched to gear 1, and during this round of water-cooling self-circulation, the gear position of the solenoid valve remains unchanged; when the temperature of any energy storage cell is not higher than the average temperature, the solenoid valve corresponding to the energy storage cell is switched to gear 2, and during this round of water-cooling self-circulation, the gear position of the solenoid valve remains unchanged. That is to say, when the temperature of the battery pack is higher than the average temperature, the solenoid valve is in gear 1, and when it is lower than the average temperature, the solenoid valve is in gear 2.

[0042] (c) When the temperature of any energy storage cell is not less than 28 degrees Celsius and less than 30 degrees Celsius, the solenoid valve corresponding to the energy storage cell is switched to gear 2, where gear 2 is the low flow rate gear of the solenoid valve; when the temperature of any energy storage cell is not less than 30 degrees Celsius, the solenoid valve corresponding to the energy storage cell is switched to gear 1, that is, when 30℃>battery pack temperature ≥28℃, the solenoid valve is set to gear 2, at which time the flow rate is slower; when 30℃≤battery pack temperature, the solenoid valve is set to gear 1, at which time the flow rate is faster.

[0043] In one embodiment, the above detection steps are judged in sequence, and the earlier the step, the higher the priority of the judgment. In the same round of water-cooling self-circulation process, once the gear position of the solenoid valve is determined in any step, it will not be changed before the end of the round of circulation.

[0044] (C) When the water-cooling self-circulation mode is turned on for a preset time interval, the temperature difference between each energy storage cell is detected: if the temperature difference is not within the preset temperature difference threshold range, the next round of water-cooling self-circulation is restarted; if the temperature difference is within the preset temperature difference threshold range, the cooling mode or heating mode is turned off, and the solenoid valve corresponding to each energy storage cell is switched to gear 0 so that the solenoid valve is closed. That is to say, when the cycle ends and the heating or cooling mode is exited, the water-cooling unit is on standby, and the solenoid valve is at gear 0, and the solenoid valve is closed.

[0045] In summary, the present invention can reduce the operating power of the unit. The power consumption of the unit when running at full speed is different from that when running at low speed. Precise control can reduce the operating power of the unit. In addition, the operation of the water-cooled unit will reduce the conversion efficiency of the energy storage system. By accurately controlling the flow rate and flow of each battery pack, the system conversion rate will be greatly improved. Moreover, controlling the flow of each battery pack can reduce the temperature difference of the battery pack, thereby correcting the system temperature difference. Precise control of each battery pack can optimize the cooling and heating time.

[0046] For the intelligent temperature control method of the energy storage battery cell of the new energy vehicle provided in the above-mentioned embodiment, the embodiment of the present invention provides an intelligent temperature control device of the energy storage battery cell of the new energy vehicle, which refers to Figure 4 The structure diagram of an intelligent temperature control device for energy storage cells of new energy vehicles shown in FIG. 1 includes the following parts:

[0047] The temperature acquisition module 402 acquires a set of battery cell temperatures corresponding to a plurality of energy storage battery cells in the new energy vehicle, as well as a maximum battery cell temperature and a minimum battery cell temperature in the set of battery cell temperatures;

[0048] The temperature control and regulation module 404 switches the temperature control mode according to the maximum cell temperature and the minimum cell temperature to perform temperature control and regulation on the energy storage cells as a whole, wherein the temperature control mode includes: a heating mode and a cooling mode;

[0049] The temperature difference correction module 406 starts the water cooling self-circulation mode when it is detected that the temperature of each energy storage cell rises to a preset minimum temperature threshold in the heating mode, or cools down to a preset maximum temperature threshold in the cooling mode, and adjusts the gear position of the solenoid valve corresponding to each energy storage cell according to the inlet and outlet water temperature of the water cooling unit and the temperature of each energy storage cell, so as to correct the temperature difference between each energy storage cell to within the preset temperature difference threshold range.

[0050] The intelligent temperature control device for the energy storage cells of the new energy vehicle provided in the embodiment of the present application can correct the temperature difference between the energy storage cells of the new energy vehicle, thereby significantly improving the accuracy of the intelligent temperature control.

[0051] In one embodiment, when switching the temperature control mode according to the maximum battery cell temperature and the minimum battery cell temperature to perform temperature control and regulation on each energy storage battery cell as a whole, the temperature control and regulation module 404 is also used to: when the minimum battery cell temperature is less than 10 degrees Celsius, start the heating mode; when the minimum battery cell temperature is not less than 10 degrees Celsius and the maximum battery cell temperature is less than 30 degrees Celsius, determine that the energy storage system is operating normally; when the minimum battery cell temperature is not less than 10 degrees Celsius and the maximum battery cell temperature is not less than 30 degrees Celsius, start the cooling mode.

[0052] In one embodiment, after the step of starting the heating mode, the temperature control module 404 is further used to heat the energy storage cell when entering the heating mode, and if the lowest cell temperature is not less than a preset lowest temperature threshold, enter the water cooling self-circulation mode.

[0053] In one embodiment, after the step of starting the cooling mode, the temperature control module 404 is further used to cool the energy storage cells when entering the cooling mode, and if the maximum cell temperature is not greater than a preset maximum temperature threshold, enter the water cooling self-circulation mode.

[0054] In one embodiment, when performing the step of adjusting the gear position of the solenoid valve corresponding to each energy storage cell according to the inlet and outlet water temperatures of the water cooling unit and the temperatures of each energy storage cell, the temperature difference correction module 406 is also used for: if the difference between the inlet water temperature and the outlet water temperature of the water cooling unit is greater than 2 degrees Celsius, the solenoid valves corresponding to each energy storage cell are switched to gear 1, wherein gear 1 is a high flow rate gear of the solenoid valve.

[0055] In one embodiment, the temperature difference correction module 406 is further used for: if the difference between the inlet water temperature and the outlet water temperature of the water cooling unit is not greater than 2 degrees Celsius, the temperature of each energy storage cell is detected respectively; when the temperature of any energy storage cell is not less than 28 degrees Celsius and less than 30 degrees Celsius, the solenoid valve corresponding to the energy storage cell is switched to gear 2, wherein gear 2 is the low flow rate gear of the solenoid valve; when the temperature of any energy storage cell is not less than 30 degrees Celsius, the solenoid valve corresponding to the energy storage cell is switched to gear 1.

[0056] In one embodiment, before the step of detecting the temperature of each energy storage cell respectively, the temperature difference correction module 406 is further used to: obtain the average temperature of each energy storage cell; when the temperature of any energy storage cell is higher than the average temperature, switch the solenoid valve corresponding to the energy storage cell to gear 1, and during this round of water-cooling self-circulation, the gear position of the solenoid valve remains unchanged; when the temperature of any energy storage cell is not higher than the average temperature, switch the solenoid valve corresponding to the energy storage cell to gear 2, and during this round of water-cooling self-circulation, the gear position of the solenoid valve remains unchanged.

[0057] In one embodiment, before performing the step of detecting the temperature of each energy storage cell respectively, the temperature difference correction module 406 is also used to: sort the energy storage cells in order of temperature from high to low, and keep the gear position of the solenoid valve corresponding to the energy storage cell with the highest temperature unchanged at gear 1 during this round of water cooling self-circulation.

[0058] In one embodiment, after performing the step of adjusting the gear position of the solenoid valve corresponding to each energy storage cell according to the inlet and outlet water temperatures of the water cooling unit and the temperatures of each energy storage cell, the temperature difference correction module 406 is further used to: detect the temperature difference between each energy storage cell when the water cooling self-circulation mode is turned on for a preset time interval; if the temperature difference is not within the preset temperature difference threshold range, restart the next round of water cooling self-circulation; if the temperature difference is within the preset temperature difference threshold range, turn off the cooling mode or the heating mode, and switch the solenoid valve corresponding to each energy storage cell to gear 0 to close the solenoid valve.

[0059] The device provided in the embodiment of the present invention has the same implementation principle and technical effects as those of the aforementioned method embodiment. For the sake of brief description, for matters not mentioned in the device embodiment, reference may be made to the corresponding contents in the aforementioned method embodiment.

[0060] An embodiment of the present invention provides a server. Specifically, the server includes a processor and a storage device. The storage device stores a computer program, and when the computer program is executed by the processor, it executes the method described in any one of the above-mentioned embodiments.

[0061] Figure 5 A structural diagram of a server provided in an embodiment of the present invention, the server 100 includes: a processor 50, a memory 51, a bus 52 and a communication interface 53, wherein the processor 50, the communication interface 53 and the memory 51 are connected via the bus 52; the processor 50 is used to execute an executable module stored in the memory 51, such as a computer program.

[0062] The memory 51 may include a high-speed random access memory (RAM), and may also include a non-volatile memory, such as at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 53 (which may be wired or wireless), and the Internet, wide area network, local area network, metropolitan area network, etc. may be used.

[0063] The bus 52 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 5Only one bidirectional arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0064] Among them, the memory 51 is used to store programs, and the processor 50 executes the program after receiving the execution instruction. The method executed by the device for flow process definition disclosed in any embodiment of the above-mentioned embodiment of the present invention can be applied to the processor 50 or implemented by the processor 50.

[0065] The processor 50 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the hardware integrated logic circuit or software instructions in the processor 50. The above processor 50 can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present invention can be implemented or executed. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor. The steps of the method disclosed in the embodiments of the present invention can be directly embodied as a hardware decoding processor to be executed, or can be executed by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. The storage medium is located in the memory 51, and the processor 50 reads the information in the memory 51 and completes the steps of the above method in combination with its hardware.

[0066] The computer program product of the readable storage medium provided in the embodiment of the present invention includes a computer-readable storage medium storing program code, and the instructions included in the program code can be used to execute the methods described in the previous method embodiments. The specific implementation can be referred to the previous method embodiments, which will not be repeated here.

[0067] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium, including several instructions to enable a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc., which can store program codes.

[0068] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention is described in detail with reference to the above-described embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-described embodiments within the technical scope disclosed by the present invention, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. An intelligent temperature control method for energy storage cells of new energy vehicles, characterized in that: The method comprises: Obtain a battery cell temperature set corresponding to multiple energy storage battery cells in a new energy vehicle, as well as a maximum battery cell temperature and a minimum battery cell temperature in the battery cell temperature set; According to the maximum battery cell temperature and the minimum battery cell temperature, the temperature control mode is switched to perform temperature control and regulation on each energy storage battery cell as a whole, wherein the temperature control mode includes: a heating mode and a cooling mode; When it is detected that the energy storage cells in each item are heated up to a preset minimum temperature threshold in the heating mode, or cooled down to a preset maximum temperature threshold in the cooling mode, the water cooling self-circulation mode is turned on, and the solenoid valve gears corresponding to each item of the energy storage cells are adjusted according to the inlet and outlet water temperatures of the water cooling unit and the temperatures of each item of the energy storage cells, so as to correct the temperature difference between each item of the energy storage cells to within the preset temperature difference threshold range; Wherein, the step of adjusting the gear position of the solenoid valve corresponding to each of the energy storage cells according to the inlet and outlet water temperatures of the water cooling unit and the temperatures of each of the energy storage cells comprises: if the difference between the inlet and outlet water temperatures of the water cooling unit is greater than 2 degrees Celsius, the solenoid valves corresponding to each of the energy storage cells are switched to gear 1, wherein gear 1 is a high flow rate gear of the solenoid valve; Among them, if the difference between the inlet water temperature and the outlet water temperature of the water cooling unit is not greater than 2 degrees Celsius, the temperature of each energy storage cell is detected respectively; when the temperature of any energy storage cell is not less than 28 degrees Celsius and less than 30 degrees Celsius, the solenoid valve corresponding to the energy storage cell is switched to gear 2, wherein gear 2 is the low flow rate gear of the solenoid valve; when the temperature of any energy storage cell is not less than 30 degrees Celsius, the solenoid valve corresponding to the energy storage cell is switched to gear 1; Among them, after the step of adjusting the gear position of the solenoid valve corresponding to each of the energy storage cells according to the inlet and outlet water temperatures of the water cooling unit and the temperature of each of the energy storage cells, the method includes: when the water cooling self-circulation mode is turned on for a preset time interval, detecting the temperature difference between each of the energy storage cells; if the temperature difference is not within the preset temperature difference threshold range, re-starting the next round of water cooling self-circulation; if the temperature difference is within the preset temperature difference threshold range, turning off the cooling mode or the heating mode, and switching the solenoid valve corresponding to each of the energy storage cells to gear 0 to close the solenoid valve.

2. The intelligent temperature control method for energy storage cells of new energy vehicles according to claim 1, characterized in that: The step of switching the temperature control mode according to the maximum battery cell temperature and the minimum battery cell temperature to perform temperature control and regulation on the energy storage battery cells as a whole includes: When the minimum battery cell temperature is less than 10 degrees Celsius, the heating mode is turned on; When the minimum battery cell temperature is not less than 10 degrees Celsius and the maximum battery cell temperature is less than 30 degrees Celsius, it is determined that the energy storage system operates normally; When the minimum battery cell temperature is not less than 10 degrees Celsius and the maximum battery cell temperature is not less than 30 degrees Celsius, the cooling mode is turned on.

3. The intelligent temperature control method for energy storage cells of new energy vehicles according to claim 2, characterized in that: After the step of starting the heating mode, the method further comprises: When entering the heating mode, the energy storage cell is heated, and if the minimum cell temperature is not less than the preset minimum temperature threshold, the water cooling self-circulation mode is entered.

4. The intelligent temperature control method for energy storage cells of new energy vehicles according to claim 2, characterized in that: After the step of starting the cooling mode, the method further comprises: When entering the cooling mode, the energy storage cell is cooled down. If the highest cell temperature is not greater than the preset highest temperature threshold, the water cooling self-circulation mode is entered.

5. The intelligent temperature control method for energy storage cells of new energy vehicles according to claim 1, characterized in that: Before the step of detecting the temperature of each of the energy storage cells respectively, the method includes: Obtaining the average temperature of each energy storage cell; When the temperature of any energy storage cell is higher than the average temperature, the solenoid valve corresponding to the energy storage cell is switched to gear 1, and during this round of water cooling self-circulation, the gear position of the solenoid valve remains unchanged; When the temperature of any energy storage cell is not higher than the average temperature, the solenoid valve corresponding to the energy storage cell is switched to gear 2, and during this round of water-cooling self-circulation, the gear position of the solenoid valve remains unchanged.

6. The intelligent temperature control method for energy storage cells of new energy vehicles according to claim 1, characterized in that: Before the step of detecting the temperature of each energy storage cell respectively, the method further includes: Arrange the energy storage cells in descending order of temperature, and keep the gear position of the solenoid valve corresponding to the energy storage cell with the highest temperature unchanged at gear 1 during this round of water-cooling self-circulation.

7. An intelligent temperature control device for energy storage cells of new energy vehicles, characterized in that: The device comprises: A temperature acquisition module is used to obtain a set of battery cell temperatures corresponding to multiple energy storage battery cells in a new energy vehicle, as well as a maximum battery cell temperature and a minimum battery cell temperature in the set of battery cell temperatures; A temperature control and regulation module switches the temperature control mode according to the maximum battery cell temperature and the minimum battery cell temperature to perform temperature control and regulation on each energy storage battery cell as a whole, wherein the temperature control mode includes: a heating mode and a cooling mode; The temperature difference correction module, when detecting that the energy storage cells in each of the energy storage units are heated up to a preset minimum temperature threshold in the heating mode, or cooled down to a preset maximum temperature threshold in the cooling mode, starts the water cooling self-circulation mode, and adjusts the gear positions of the solenoid valves corresponding to the energy storage cells in each of the energy storage units according to the inlet and outlet water temperatures of the water cooling unit and the temperatures of the energy storage cells in each of the energy storage units, so as to correct the temperature difference between the energy storage cells in each of the energy storage units to within the preset temperature difference threshold range; Wherein, the step of adjusting the gear position of the solenoid valve corresponding to each of the energy storage cells according to the inlet and outlet water temperatures of the water cooling unit and the temperatures of each of the energy storage cells comprises: if the difference between the inlet and outlet water temperatures of the water cooling unit is greater than 2 degrees Celsius, the solenoid valves corresponding to each of the energy storage cells are switched to gear 1, wherein gear 1 is a high flow rate gear of the solenoid valve; Among them, if the difference between the inlet water temperature and the outlet water temperature of the water cooling unit is not greater than 2 degrees Celsius, the temperature of each energy storage cell is detected respectively; when the temperature of any energy storage cell is not less than 28 degrees Celsius and less than 30 degrees Celsius, the solenoid valve corresponding to the energy storage cell is switched to gear 2, wherein gear 2 is the low flow rate gear of the solenoid valve; when the temperature of any energy storage cell is not less than 30 degrees Celsius, the solenoid valve corresponding to the energy storage cell is switched to gear 1; Among them, after the step of adjusting the gear position of the solenoid valve corresponding to each of the energy storage cells according to the inlet and outlet water temperatures of the water cooling unit and the temperature of each of the energy storage cells, the method includes: when the water cooling self-circulation mode is turned on for a preset time interval, detecting the temperature difference between each of the energy storage cells; if the temperature difference is not within the preset temperature difference threshold range, re-starting the next round of water cooling self-circulation; if the temperature difference is within the preset temperature difference threshold range, turning off the cooling mode or the heating mode, and switching the solenoid valve corresponding to each of the energy storage cells to gear 0 to close the solenoid valve.

8. A server, characterized in that: The method comprises a processor and a memory, wherein the memory stores computer executable instructions that can be executed by the processor, and the processor executes the computer executable instructions to implement the method according to any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are called and executed by a processor, the computer-executable instructions prompt the processor to implement the method according to any one of claims 1 to 6.

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