Energy storage management evaluation method, device, electronic device and storage medium

Abstract

The present invention discloses an energy storage management evaluation method, device, electronic device and storage medium, which relates to the field of battery management technology. The method includes: obtaining a plurality of simulated batteries; connecting the plurality of simulated batteries in series and / or in parallel to form a battery module, and connecting a power element between the positive and negative poles of each simulated battery; obtaining a simulated battery box, and placing the battery module in the first chamber of the simulated battery box; the control system sequentially provides a plurality of different working currents to the power element, so that the simulated battery heats up at different heating rates; under each working current, the battery module is temperature managed by an air cooling system, a liquid cooling system and an immersion system respectively, and the temperature management effects of the air cooling system, the liquid cooling system and the immersion system are determined; according to the temperature management effect, a temperature management strategy is determined. According to the method of the embodiment of the present invention, the temperature management effects of various thermal management systems can be accurately evaluated.

Description

Technical Field

[0001] The present invention relates to the field of battery management technology, and in particular to an energy storage management evaluation method, device, electronic equipment and storage medium. Background Art

[0002] With the growth of global energy demand and the popularization of renewable energy, the development of energy storage technology has become particularly important. As an efficient energy storage solution, energy storage battery boxes have been widely used in various fields. In order to ensure the reliability and stability of the energy storage battery box, the energy storage battery box needs to be thermally managed, because the temperature will have a certain impact on the performance and life of the battery, and too high or too low temperature may cause battery damage. At present, the thermal management of energy storage battery boxes mainly adopts the following methods: air cooling system, liquid cooling system and immersion system. Although the above thermal management methods can meet the cooling needs of energy storage battery boxes to a certain extent, in actual applications, the design and optimization of these systems often rely on simulation calculation results. Although simulation calculations can provide theoretical guidance, they lack the support of actual test data, and it is difficult to comprehensively evaluate the performance of various thermal management systems under different working conditions. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an energy storage management evaluation method, device, electronic device and storage medium, which can accurately evaluate the temperature management effects of various thermal management systems.

[0004] In a first aspect, a method for evaluating energy storage management according to an embodiment of the present invention comprises the following steps:

[0005] Acquire a plurality of simulated batteries; each of the simulated batteries is provided with a first temperature sensor;

[0006] Connecting a plurality of the simulated batteries in series and / or in parallel to form a battery module, and connecting a power element between the positive and negative electrodes of each simulated battery;

[0007] Obtain a simulated battery box, and place the battery module in a first chamber of the simulated battery box; the simulated battery box includes the first chamber and the second chamber separated by a heat dissipation plate, a heat exchange box is provided in the second chamber, an air cooling system and a liquid cooling system are provided in the first chamber, an immersion system is provided outside the simulated battery box, the immersion system is connected to the heat exchange box, and a liquid outlet of the heat exchange box is connected to the first chamber;

[0008] The control system sequentially provides a plurality of different operating currents to the power element, so that the simulated battery is heated at different heating rates;

[0009] Under each of the working currents, the temperature of the battery module is managed by the air cooling system, the liquid cooling system and the immersion system respectively;

[0010] Determining, by a first temperature sensor, the temperature management effects of the air cooling system, the liquid cooling system, and the immersion system at each of the working currents;

[0011] A temperature management strategy is determined according to the temperature management effect, and temperature management is performed on the real battery box according to the temperature management strategy.

[0012] According to some embodiments of the present invention, the immersion system includes an oil storage tank and a circulation pump, the oil storage tank is provided with a constant temperature chamber and a temperature adjustment chamber, the temperature adjustment chamber stores a first insulating oil, the constant temperature chamber stores a constant temperature second insulating oil, the temperature of the second insulating oil is lower than the first insulating oil; the temperature adjustment chamber is provided with a temperature adjustment element and a second temperature sensor, the liquid inlet of the heat exchange box is communicated with the liquid outlets of the constant temperature chamber and the temperature adjustment chamber respectively through a first three-way valve, the liquid outlet of the heat exchange box is communicated with the liquid inlet of the first chamber through a first solenoid valve, and the liquid outlet of the first chamber is communicated with the liquid inlet of the temperature adjustment chamber through a second solenoid valve;

[0013] When the immersion system is selected to perform temperature management on the battery module, the following steps are included:

[0014] When the temperature of the battery module reaches a first preset temperature, opening the first inlet of the first three-way valve to connect the temperature regulating chamber with the heat exchange box;

[0015] Opening the first solenoid valve and the second solenoid valve, the circulating pump drives the first insulating oil to circulate in the temperature adjustment chamber, the heat exchange box and the first chamber to immerse the battery module and cool the battery module;

[0016] When the temperature of the battery module reaches a second preset temperature, the first inlet of the first three-way valve is closed, the circulating pump pumps the first insulating oil in the first chamber and part of the first insulating oil in the heat exchange box into the temperature adjustment chamber, and closes the first solenoid valve and the second solenoid valve; the second preset temperature is greater than the first preset temperature;

[0017] The second inlet of the first three-way valve is opened to connect the constant temperature chamber with the heat exchange box, and the circulating pump pumps the second insulating oil into the heat exchange box to mix with part of the first insulating oil in the heat exchange box to obtain mixed insulating oil;

[0018] Opening the first solenoid valve to allow the mixed insulating oil to enter the first chamber and soak the battery module;

[0019] After the first insulating oil in the temperature regulating chamber is cooled by the temperature regulating element, the first inlet of the first three-way valve, the first solenoid valve and the second solenoid valve are opened, and the circulating pump drives the cooled first insulating oil to circulate in the temperature regulating chamber, the heat exchange box and the first chamber.

[0020] According to some embodiments of the present invention, the liquid cooling system includes a first liquid cooling plate, a second liquid cooling plate, and a liquid cooling channel disposed between adjacent simulated batteries, and the first liquid cooling plate and the second liquid cooling plate are connected through the liquid cooling channel;

[0021] When the liquid cooling system is selected to perform temperature management on the battery module, the following steps are included:

[0022] Introducing a first liquid at a first temperature into the first liquid cooling plate, so that the first liquid flows from a liquid inlet of the first liquid cooling plate to a liquid outlet of the first liquid cooling plate, and the first liquid flows from the first liquid cooling plate through the liquid cooling channel to the second liquid cooling plate;

[0023] A second liquid at a second temperature is introduced into the second liquid cooling plate, so that the second liquid flows from the liquid inlet of the second liquid cooling plate to the liquid outlet of the second liquid cooling plate, and the second liquid flows from the second liquid cooling plate through the liquid cooling channel to the first liquid cooling plate.

[0024] According to some embodiments of the present invention, the further comprising:

[0025] Disposing at least one real battery in the battery module;

[0026] Disposing a heating element at the bottom of the real battery and electrically connecting the heating element to the control system;

[0027] The control system activates the heating element to heat the real battery until the real battery experiences thermal runaway;

[0028] The battery module is cooled by the air cooling system, the liquid cooling system and the immersion system, and the cooling effects of the air cooling system, the liquid cooling system and the immersion system when thermal runaway occurs in the real battery are determined by the first temperature sensor.

[0029] According to some embodiments of the present invention, the real battery box is provided with a plurality of real batteries connected in series and / or in parallel; the temperature management strategy includes:

[0030] Collecting the average battery temperature of the real battery box through a temperature collection system;

[0031] When the average battery temperature exceeds a first preset temperature, according to the heating rate of the average battery temperature and the temperature management effects of the air cooling system, the liquid cooling system and the immersion system, one of the air cooling system, the liquid cooling system and the immersion system is selected to cool the real battery box;

[0032] When the average battery temperature exceeds a second preset temperature, the real battery box is cooled by the air cooling system, the liquid cooling system and the immersion system; the second preset temperature is greater than the first preset temperature.

[0033] According to some embodiments of the present invention, an atomizing nozzle is provided in the real battery box, the atomizing nozzle is connected to one end of a water pump, the other end of the water pump is connected to a liquid storage tank, and a cooling medium is stored in the liquid storage tank; the temperature management strategy also includes:

[0034] Collecting the temperature of each real battery in the real battery box by the temperature collection system;

[0035] When it is detected that the temperature of the real battery exceeds a preset threshold, the real battery is cooled by the air cooling system, the liquid cooling system and the immersion system, and the water pump sends the cooling medium in the liquid storage tank to the atomizing nozzle;

[0036] The atomizing nozzle atomizes the cooling medium and then sprays it onto the surface of the real battery to cool the battery.

[0037] According to some embodiments of the present invention, the step of obtaining a plurality of simulated batteries comprises:

[0038] Get a simulated electrolyte with the same specific heat capacity as the real battery;

[0039] A plurality of battery shells are obtained, and the simulated electrolyte is injected into each of the battery shells to form the simulated battery.

[0040] In a second aspect, an energy storage management evaluation device according to an embodiment of the present invention comprises at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions executable by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute the energy storage management evaluation method described in the embodiment of the first aspect above.

[0041] In a third aspect, an electronic device according to an embodiment of the present invention includes the energy storage management and evaluation device described in the embodiment of the second aspect.

[0042] In a fourth aspect, a computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the energy storage management evaluation method described in the embodiment of the first aspect.

[0043] The energy storage management evaluation method, device, electronic device and storage medium according to the embodiments of the present invention have at least the following beneficial effects: by using a simulated battery with properties close to those of a real battery, the effects of different thermal management strategies in actual applications can be accurately evaluated; through real-time monitoring and data analysis, actual temperature data support can be provided for the design of a thermal management system for a real battery box, which helps to optimize and improve the thermal management solution; by providing different operating currents, the temperature management effects of the air cooling system / liquid cooling system / immersion system under different working conditions can be verified, and the temperature management effects of the three can be compared, so that a temperature management strategy for the real battery box can be formulated based on the comparison results.

[0044] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0046] Figure 1 A flowchart of the steps of the energy storage management evaluation method according to an embodiment of the present invention;

[0047] Figure 2 It is a structural schematic diagram of a simulated battery box according to an embodiment of the present invention;

[0048] Figure 3 Schematic diagram of the structure of a battery module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0049] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and are not to be construed as limitations on the present application. For the step numbers in the following embodiments, they are only provided for the convenience of explanation, and the order between the steps is not limited in any way, and the execution order of each step in the embodiment can be adaptively adjusted according to the understanding of those skilled in the art.

[0050] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0051] The terms "first", "second", "third" and "fourth" etc. in the specification and claims of the present invention and the drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or units that are inherent to these processes, methods, products or devices.

[0052] Reference to "embodiments" in the present invention means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places 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 may be combined with other embodiments.

[0053] With the growth of global energy demand and the popularization of renewable energy, the development of energy storage technology has become particularly important. As an efficient energy storage solution, energy storage battery boxes have been widely used in various fields. In order to ensure the reliability and stability of the energy storage battery box, the energy storage battery box needs to be thermally managed, because the temperature will have a certain impact on the performance and life of the battery, and too high or too low temperature may cause battery damage. At present, the thermal management of energy storage battery boxes mainly adopts the following methods: air cooling system, liquid cooling system and immersion system. Although the above thermal management methods can meet the cooling needs of energy storage battery boxes to a certain extent, in actual applications, the design and optimization of these systems often rely on simulation calculation results. Although simulation calculations can provide theoretical guidance, they lack the support of actual test data, and it is difficult to comprehensively evaluate the performance of various thermal management systems under different working conditions.

[0054] To this end, the embodiments of the present invention propose an energy storage management evaluation method, device, electronic device and storage medium. By using a simulated battery with properties close to those of a real battery, the effects of different thermal management strategies in actual applications can be accurately evaluated. Through real-time monitoring and data analysis, actual temperature data support can be provided for the design of a thermal management system for a real battery box, which helps to optimize and improve the thermal management scheme. By providing different operating currents, the temperature management effects of the air cooling system / liquid cooling system / immersion system under different working conditions can be verified, and the temperature management effects of the three can be compared, so as to formulate a temperature management strategy for the real battery box based on the comparison results.

[0055] On the one hand, the embodiment of the present invention provides a method for evaluating energy storage management, such as Figure 1 As shown, the method comprises the following steps:

[0056] Step S100: obtaining a plurality of simulated batteries 110; each simulated battery 110 is provided with a first temperature sensor;

[0057] Step S200: multiple simulated batteries 110 are connected in series and / or in parallel to form a battery module 100, and a power element 120 is connected between the positive and negative electrodes of each simulated battery 110;

[0058] Step S300: obtaining a simulated battery box 200, and placing the battery module 100 in the first chamber 210 of the simulated battery box 200; the simulated battery box 200 includes a first chamber 210 and a second chamber 220 separated by a heat dissipation plate, a heat exchange box 300 is arranged in the second chamber 220, an air cooling system 400 and a liquid cooling system 500 are arranged in the first chamber 210, an immersion system 600 is arranged outside the simulated battery box 200, the immersion system 600 is connected to the heat exchange box 300, and the liquid outlet of the heat exchange box 300 is communicated with the first chamber 210;

[0059] Step S400: the control system 700 sequentially provides a plurality of different operating currents to the power element 120, so that the simulated battery 110 is heated at different heating rates;

[0060] Step S500: Under each working current, the temperature of the battery module 100 is managed by the air cooling system 400, the liquid cooling system 500 and the immersion system 600 respectively;

[0061] Step S600: determining the temperature management effects of the air cooling system 400, the liquid cooling system 500 and the immersion system 600 at each operating current through the first temperature sensor;

[0062] Step S700: Determine a temperature management strategy based on the temperature management effect, and perform temperature management on the actual battery box according to the temperature management strategy.

[0063] Specifically, in order to obtain the simulated battery 110, first, the specific heat capacity and other parameters of the real battery are obtained, and then, a simulated electrolyte having substantially the same specific heat capacity as the real battery is selected, and the simulated electrolyte is injected into the battery shell to form the simulated battery 110. It should be noted that the battery shell of the simulated battery 110 has the same structure and size as the real battery, and a simulated electrolyte is filled inside each battery shell, but does not contain a positive electrode, a negative electrode and a diaphragm material to form the simulated battery 110. In order to ensure the accuracy of the test results, it is necessary to make the characteristics of the simulated battery 110 basically consistent with those of the real battery. To this end, when making the simulated battery 110, a simulated electrolyte having properties close to those of the real battery is injected into the inside of the battery shell. After the simulated battery 110 is formed, it is necessary to test the simulated battery 110 to obtain the specific heat capacity, thermal conductivity and heating power of the simulated battery 110, and ensure that the error between the characteristic parameters of the simulated battery 110 and the characteristic parameters of the real battery is within a preset range. At the same time, a first temperature sensor is provided inside the simulated battery 110 to facilitate real-time monitoring of the temperature change of the simulated battery 110.

[0064] After the simulated battery 110 is manufactured, Figure 3 As shown, multiple simulated batteries 110 are connected in series and / or in parallel to form a battery module 100. Then, a power element 120 is connected between the positive and negative electrodes of each simulated battery 110. By controlling the current flowing through the power element 120 to change the heat generated by the power element 120, the heating condition of the battery under different operating conditions can be simulated. In this example, the power element 120 is a resistor, and the heat generated by the resistor is changed by controlling the current flowing through the resistor.

[0065] like Figure 2 As shown, the battery module 100 is placed in the first chamber 210 of the simulated battery box 200; the simulated battery box 200 includes a first chamber 210 and a second chamber 220 separated by a heat dissipation plate, a heat exchange box 300 is arranged in the second chamber 220, an air cooling system 400 and a liquid cooling system 500 are arranged in the first chamber 210, and an immersion system 600 is arranged outside the simulated battery box 200, the immersion system 600 is connected to the heat exchange box 300, and the liquid outlet of the heat exchange box 300 is connected to the first chamber 210. Among them, the air cooling system 400 cools down the simulated battery 110 in the simulated battery box 200 through a heat dissipation fan and a heat sink, the liquid cooling system 500 cools down the simulated battery 110 in the simulated battery box 200 through a liquid cooling plate, and the immersion system 600 cools down the simulated battery 110 in the simulated battery box 200 by immersing the simulated battery 110 in the simulated battery box 200 in insulating oil.

[0066] After the simulated battery box 200 is constructed, the simulated battery box 200 is tested to evaluate the temperature management effects of the air cooling system 400, the liquid cooling system 500 and the immersion system 600, and to evaluate and compare the control effects of each system under different working conditions. To this end, when testing, the control system 700 is used to provide a plurality of different working currents for the power element 120, so that the simulated battery 110 is heated at different heating rates. It should be noted that the control system 700 may include a controller and a constant current source, and the controller can control the constant current source to generate currents of different sizes, so that each simulated battery 110 has a different heating power, thereby simulating different working conditions. Corresponding to each different working current, the air cooling system 400, the liquid cooling system 500 and the immersion system 600 are required to cool down the simulated battery box 200 respectively to verify the cooling effects of the air cooling system 400, the liquid cooling system 500 and the immersion system 600 under different working conditions. For example, after the control system 700 provides the first current to the power element 120, the battery module 100 is cooled down through the air cooling system 400 to verify the cooling effect of the air cooling system 400 under the first current; similarly, after the control system 700 provides the first current to the power element 120, the battery module 100 is cooled down through the liquid cooling system 500 / immersion system 600 to verify the cooling effect of the liquid cooling system 500 / immersion system 600 under the first current; then, the first current is changed to the second current, and the cooling effect of the air cooling system 400 / liquid cooling system 500 / immersion system 600 under the second current is verified, and so on.

[0067] In order to verify the cooling effect of each system, in each process, the temperature of each simulated battery 110 is obtained through the first temperature sensor, so as to calculate the average temperature of the battery module 100. At each working current, the change of the average temperature of the battery module 100 under the action of the air cooling system 400 / liquid cooling system 500 / immersion system 600 is recorded, so that the temperature management effect of the air cooling system 400 / liquid cooling system 500 / immersion system 600 can be determined according to the change of the average temperature. The faster the average temperature drops, the better the corresponding temperature management effect is, and the slower the average temperature drops, the worse the corresponding temperature management effect is.

[0068] Through the above experiments, it is possible to verify whether the temperature management effect of the air cooling system 400 / liquid cooling system 500 / immersion system 600 under different working conditions meets expectations, and to determine whether the temperature management effect of each system needs to be optimized accordingly. At the same time, the temperature management effects of the air cooling system 400 / liquid cooling system 500 / immersion system 600 under different working conditions can be compared, so as to formulate a temperature management strategy based on the comparison results, optimize the temperature management of the real battery box, and thus ensure the normal operation of the real battery box.

[0069] According to the energy storage management evaluation method of the embodiment of the present invention, by using a simulated battery 110 that is close to the properties of a real battery, it is possible to reduce the testing cost and accurately evaluate the effects of different thermal management strategies in actual applications; through real-time monitoring and data analysis, it is possible to provide actual temperature data support for the design of a thermal management system for a real battery box, which is helpful to optimize and improve the thermal management solution; by providing different operating currents, it is possible to verify the temperature management effects of the air cooling system 400 / liquid cooling system 500 / immersion system 600 under different working conditions, and compare the temperature management effects of the three, so as to formulate a temperature management strategy for the real battery box based on the comparison results.

[0070] Further, in some embodiments of the present invention, the immersion system 600 includes an oil storage tank and a circulation pump, the oil storage tank is provided with a constant temperature chamber and a temperature regulating chamber, the temperature regulating chamber stores a first insulating oil, the constant temperature chamber stores a second insulating oil of constant temperature, and the temperature of the second insulating oil is lower than the first insulating oil; the temperature regulating chamber is provided with a temperature regulating element and a second temperature sensor, the liquid inlet of the heat exchange box 300 is connected to the liquid outlets of the constant temperature chamber and the temperature regulating chamber respectively through a first three-way valve, the liquid outlet of the heat exchange box 300 is connected to the liquid inlet of the first chamber 210 through a first solenoid valve, and the liquid outlet of the first chamber 210 is connected to the liquid inlet of the temperature regulating chamber through a second solenoid valve. When the immersion system 600 is selected to perform temperature management on the battery module 100, the following six steps are included:

[0071] (1) When the temperature of the battery module 100 reaches a first preset temperature, the first inlet of the first three-way valve is opened to connect the temperature regulating chamber with the heat exchange box 300;

[0072] (2) Open the first solenoid valve and the second solenoid valve, and the circulation pump drives the first insulating oil to circulate in the temperature adjustment chamber, the heat exchange box 300 and the first chamber 210 to immerse the battery module 100 and cool the battery module 100;

[0073] (3) When the temperature of the battery module 100 reaches the second preset temperature, the first inlet of the first three-way valve is closed, the circulation pump pumps the first insulating oil in the first chamber 210 and part of the first insulating oil in the heat exchange box 300 into the temperature adjustment chamber, and the first solenoid valve and the second solenoid valve are closed;

[0074] (4) Open the second inlet of the first three-way valve to connect the constant temperature chamber with the heat exchange box 300, and the circulating pump pumps the second insulating oil into the heat exchange box 300 to mix with part of the first insulating oil in the heat exchange box 300 to obtain mixed insulating oil;

[0075] (5) Open the first solenoid valve to allow the mixed insulating oil to enter the first chamber 210 and soak the battery module;

[0076] (6) After the first insulating oil in the temperature regulating chamber is cooled by the temperature regulating element, the first inlet of the first three-way valve, the first solenoid valve and the second solenoid valve are opened, and the circulating pump drives the cooled first insulating oil to circulate in the temperature regulating chamber, the heat exchange box 300 and the first chamber 210.

[0077] Specifically, when the control system 700 provides a certain working current to the power element 120, the battery module 100 gradually heats up. When the temperature of the battery module 100 reaches the first preset temperature, the battery module 100 begins to be cooled down through the immersion system 600. At this time, the first inlet of the first three-way valve, the first solenoid valve, and the second solenoid valve are opened to connect the temperature regulating chamber with the heat exchange box 300, the heat exchange box 300 with the first chamber 210, and the first chamber 210 with the temperature regulating chamber. In this way, driven by the circulating pump, the first insulating oil in the temperature regulating chamber can circulate in the temperature regulating chamber, the heat exchange box 300, and the first chamber 210, immersing the battery module 100 and cooling the battery module 100. In this case, the cooling effect of the immersion system 600 can be verified. If the battery module 100 drops from the first preset temperature to the normal temperature range, it means that the temperature management effect of the immersion system 600 is good. The cooling efficiency of the immersion system 600 can be determined by the change in the average temperature of the battery module 100. If the average temperature of the battery module 100 does not begin to drop after cooling by the first insulating oil, but continues to rise and reaches the second preset temperature, it means that the temperature of the first insulating oil is high. In this case, the battery module 100 cannot be effectively cooled. At this time, in order to cool the battery module 100, it is necessary to reduce the temperature of the first insulating oil in the temperature control chamber by a temperature control element, and use the cooled first insulating oil to cool the battery module 100. Since it takes a certain amount of time for the temperature control element to cool the first insulating oil, during this period, in order to avoid damage to the simulated battery 110 due to excessive temperature, the simulated battery 110 needs to be cooled quickly. At this time, the first inlet of the first three-way valve is closed first, so that the circulating pump pumps the first insulating oil in the first chamber 210 and part of the first insulating oil in the heat exchange box 300 into the temperature adjustment chamber, and closes the first solenoid valve and the second solenoid valve; then, the second inlet of the first three-way valve is opened to connect the constant temperature chamber with the heat exchange box 300, and the circulating pump pumps the second insulating oil into the heat exchange box 300, and mixes it with part of the first insulating oil in the heat exchange box 300 to obtain mixed insulating oil; then the first solenoid valve is opened to allow the mixed insulating oil to enter the first chamber 210 and soak the battery module 100. It should be noted that the second insulating oil with a lower temperature is stored in the constant temperature chamber. In order to avoid the second insulating oil from being too low in temperature and damaging the simulated battery 110, the second insulating oil is mixed with the first insulating oil to produce a mixed insulating oil with a lower temperature, and then the battery module 100 is quickly cooled. After the temperature regulating element lowers the first insulating oil in the temperature regulating chamber to a suitable temperature, the first inlet of the first three-way valve, the first solenoid valve and the second solenoid valve are opened, and the circulating pump drives the cooled first insulating oil to circulate in the temperature regulating chamber, the heat exchange box 300 and the first chamber 210. In this way, the temperature can be controlled in time when the temperature of the battery module 100 is high and thermal runaway of the battery may occur.When the immersion system is applied to a real battery box, it can not only cool down the real battery when the temperature of the real battery is slightly higher than the normal range, but also quickly cool down the real battery when the temperature of the real battery is too high and thermal runaway is likely to occur. In this way, the cooling effect of the immersion system 600 on the battery can be verified, and the ability of the immersion system to prevent the battery from thermal runaway can be verified.

[0078] Further, in some embodiments of the present invention, the liquid cooling system 500 includes a first liquid cooling plate, a second liquid cooling plate, and a liquid cooling channel disposed between adjacent simulated batteries 110, and the first liquid cooling plate and the second liquid cooling plate are connected through the liquid cooling channel. When the liquid cooling system 500 is selected to perform temperature management on the battery module 100, the following two steps are included:

[0079] (1) introducing a first liquid at a first temperature into the first liquid cooling plate, so that the first liquid flows from the liquid inlet of the first liquid cooling plate to the liquid outlet of the first liquid cooling plate, and the first liquid flows from the first liquid cooling plate through the liquid cooling channel to the second liquid cooling plate;

[0080] (2) A second liquid at a second temperature is introduced into the second liquid cooling plate, so that the second liquid flows from a liquid inlet of the second liquid cooling plate to a liquid outlet of the second liquid cooling plate, and the second liquid flows from the second liquid cooling plate through a liquid cooling channel to the first liquid cooling plate.

[0081] By introducing liquids of different temperatures into the first liquid cooling plate and the second liquid cooling plate, and allowing the two liquids of different temperatures to circulate between the first liquid cooling plate, the second liquid cooling plate and the liquid cooling channel, the efficiency of heat exchange can be accelerated and the cooling efficiency of the liquid cooling system 500 on the battery module 100 can be improved.

[0082] Furthermore, in some embodiments of the present invention, the energy storage management evaluation method further includes the following four steps:

[0083] (1) at least one real battery is provided in the battery module 100;

[0084] (2) A heating element is provided at the bottom of the real battery, and the heating element is electrically connected to the control system 700;

[0085] (3) The control system starts the heating element to heat the real battery until the real battery experiences thermal runaway;

[0086] (4) The battery module 100 is cooled by the air cooling system 400, the liquid cooling system 500 and the immersion system 600, and the cooling effect of the air cooling system 400, the liquid cooling system 500 and the immersion system 600 when the actual battery has thermal runaway is determined by the first temperature sensor.

[0087] Specifically, by setting a heating element at the bottom of the real battery, the control system can start the heating element to heat the real battery, thereby simulating the thermal runaway of the real battery. In this case, the first temperature sensor records the current temperature of the simulated battery 110 when the real battery is in thermal runaway, and determines the thermal conductivity of the thermal runaway battery. At the same time, the simulated battery box 200 is cooled by the air cooling system 400, the liquid cooling system 500 and the immersion system 600, so as to determine the management effect of the battery thermal runaway when the air cooling system 400, the liquid cooling system 500 and the immersion system 600 work together.

[0088] Furthermore, in some embodiments of the present invention, a plurality of real batteries connected in series and / or in parallel are arranged in the real battery box, and the temperature management strategy includes:

[0089] Step S910: collecting the average battery temperature of the actual battery box through the temperature collection system;

[0090] Step S920: when the average battery temperature exceeds the first preset temperature, one of the air cooling system 400, the liquid cooling system 500 and the immersion system 600 is selected to cool the real battery box according to the heating rate of the average battery temperature and the temperature management effects of the air cooling system 400, the liquid cooling system 500 and the immersion system 600;

[0091] Step S930: When the average battery temperature exceeds a second preset temperature, the real battery box is cooled by the air cooling system 400, the liquid cooling system 500 and the immersion system 600; the second preset temperature is greater than the first preset temperature.

[0092] Specifically, in the actual operation of the real battery box, the temperature of each real battery in the real battery box is collected in real time by the temperature collection system, so as to obtain the average battery temperature of the real battery box as a whole. When the average battery temperature of the real battery box is high and exceeds the first preset temperature, one of the air cooling system 400, the liquid cooling system 500 and the immersion system 600 is selected to cool the real battery box according to the heating rate of the average battery temperature. The heating rate of the average battery temperature can correspond to the working current provided to the power element 120; since the temperature management effects of the air cooling system 400, the liquid cooling system 500 and the immersion system 600 under different working currents have been determined after testing the simulated battery box 200, the air cooling system 400, the liquid cooling system 500 and the immersion system 600 can be selected according to the heating rate of the average battery temperature to cool the real battery box. When the average battery temperature exceeds the second preset value, it means that the average battery temperature in the real battery box is too high, and there may be a risk of thermal runaway. The real battery box needs to be cooled down at the fastest speed. At this time, the air cooling system 400, the liquid cooling system 500 and the immersion system 600 are selected to cool down the real battery box together. By selecting different temperature management strategies according to different working conditions of the real battery box, it is possible to control the temperature of the real battery box and reduce the working power of the entire system as much as possible, thereby saving energy consumption.

[0093] Furthermore, in some embodiments of the present invention, an atomizing nozzle is provided in the real battery box, the atomizing nozzle is connected to one end of a water pump, the other end of the water pump is connected to a liquid storage tank, and a cooling medium is stored in the liquid storage tank; the temperature management strategy also includes:

[0094] The temperature of each real battery in the real battery box is collected by a temperature collection system;

[0095] When it is detected that the temperature of the real battery exceeds a preset threshold, the real battery is cooled by an air cooling system, a liquid cooling system and an immersion system, and a water pump sends the cooling medium in the liquid storage tank to the atomizing nozzle;

[0096] The atomizing nozzle atomizes the cooling medium and sprays it on the surface of the actual battery to cool the battery.

[0097] Specifically, when the temperature of a real battery is too high and exceeds a preset threshold, it means that the real battery is about to / has already thermally run away. In order to avoid spontaneous combustion of the entire real battery box due to thermal runaway of a real battery, at this time, the cooling medium is atomized through an atomizing nozzle and sprayed on the surface of the real battery to cool the real battery and prevent the real battery from catching fire due to excessive temperature.

[0098] According to the energy storage management evaluation method of an embodiment of the present invention, by using a simulated battery with properties close to those of a real battery, the effects of different thermal management strategies in actual applications can be accurately evaluated; through real-time monitoring and data analysis, actual temperature data support can be provided for the design of a thermal management system for a real battery box, which is helpful to optimize and improve the thermal management solution; by providing different operating currents, the temperature management effects of the air cooling system / liquid cooling system / immersion system under different working conditions can be verified, and the temperature management effects of the three can be compared, so as to formulate a temperature management strategy for the real battery box based on the comparison results.

[0099] On the other hand, the present invention also provides an energy storage management evaluation device, comprising:

[0100] The processor may be implemented by a general-purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of the present application;

[0101] The memory can be implemented in the form of a read-only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM). The memory can store an operating system and other application programs. When the technical solution provided in the embodiments of this specification is implemented by software or firmware, the relevant program code is stored in the memory, and the processor is called to execute the energy storage management evaluation method of the embodiments of this application;

[0102] Input / output interface, used to realize information input and output;

[0103] Communication interface, used to realize communication interaction between this device and other devices. Communication can be realized through wired methods (such as USB, network cable, etc.) or wireless methods (such as mobile network, WIFI, Bluetooth, etc.);

[0104] The bus, which transfers information between the various components of the device (such as the processor, memory, input / output interfaces, and communication interfaces);

[0105] The processor, memory, input / output interface and communication interface are connected to each other through a bus inside the device.

[0106] An embodiment of the present application also provides an electronic device, comprising the above energy storage management and evaluation device.

[0107] An embodiment of the present application further provides a storage medium, which is a computer-readable storage medium and stores a computer program. When the computer program is executed by a processor, the above-mentioned energy storage management evaluation method is implemented.

[0108] As a non-transient computer-readable storage medium, the memory can be used to store non-transient software programs and non-transient computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage devices. In some embodiments, the memory may optionally include a memory remotely arranged relative to the processor, and these remote memories may be connected to the processor via a network. Examples of the above-mentioned networks include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof. The device embodiments described above are merely schematic, wherein the units described as separate components may or may not be physically separated, and are implemented to be located in one place, or may also be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0109] It will be appreciated by those skilled in the art that all or some of the steps and systems in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or non-transitory medium) and a communication medium (or transient medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically include computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0110] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the above-mentioned implementation mode. Technical personnel familiar with the field can also make various equivalent deformations or substitutions under the shared conditions without violating the spirit of the present invention. These equivalent deformations or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A method for evaluating energy storage management, characterized in that: The following steps are involved: Acquire a plurality of simulated batteries; each of the simulated batteries is provided with a first temperature sensor; Connecting a plurality of the simulated batteries in series and / or in parallel to form a battery module, and connecting a power element between the positive and negative electrodes of each simulated battery; Obtain a simulated battery box, and place the battery module in a first chamber of the simulated battery box; the simulated battery box includes the first chamber and the second chamber separated by a heat dissipation plate, a heat exchange box is provided in the second chamber, an air cooling system and a liquid cooling system are provided in the first chamber, an immersion system is provided outside the simulated battery box, the immersion system is connected to the heat exchange box, and a liquid outlet of the heat exchange box is connected to the first chamber; The control system sequentially provides a plurality of different operating currents to the power element, so that the simulated battery is heated at different heating rates; Under each of the working currents, the temperature of the battery module is managed by the air cooling system, the liquid cooling system and the immersion system respectively; Determining, by means of the first temperature sensor, the temperature management effects of the air cooling system, the liquid cooling system and the immersion system at each of the working currents; Determining a temperature management strategy according to the temperature management effect, and performing temperature management on the real battery box according to the temperature management strategy; The immersion system comprises an oil storage tank and a circulation pump, wherein a constant temperature chamber and a temperature regulating chamber are arranged in the oil storage tank, wherein a first insulating oil is stored in the temperature regulating chamber, and a second insulating oil of constant temperature is stored in the constant temperature chamber, wherein the temperature of the second insulating oil is lower than that of the first insulating oil; a temperature regulating element and a second temperature sensor are arranged in the temperature regulating chamber, wherein a liquid inlet of the heat exchange box is communicated with liquid outlets of the constant temperature chamber and the temperature regulating chamber respectively through a first three-way valve, wherein a liquid outlet of the heat exchange box is communicated with a liquid inlet of the first chamber through a first solenoid valve, and a liquid outlet of the first chamber is communicated with a liquid inlet of the temperature regulating chamber through a second solenoid valve; When the immersion system is selected to perform temperature management on the battery module, the following steps are included: When the temperature of the battery module reaches a first preset temperature, opening the first inlet of the first three-way valve to connect the temperature regulating chamber with the heat exchange box; Opening the first solenoid valve and the second solenoid valve, the circulating pump drives the first insulating oil to circulate in the temperature adjustment chamber, the heat exchange box and the first chamber to immerse the battery module and cool the battery module; When the temperature of the battery module reaches a second preset temperature, the first inlet of the first three-way valve is closed, the circulating pump pumps the first insulating oil in the first chamber and part of the first insulating oil in the heat exchange box into the temperature adjustment chamber, and closes the first solenoid valve and the second solenoid valve; the second preset temperature is greater than the first preset temperature; The second inlet of the first three-way valve is opened to connect the constant temperature chamber with the heat exchange box, and the circulating pump pumps the second insulating oil into the heat exchange box to mix with part of the first insulating oil in the heat exchange box to obtain mixed insulating oil; Opening the first solenoid valve to allow the mixed insulating oil to enter the first chamber and soak the battery module; After the first insulating oil in the temperature regulating chamber is cooled by the temperature regulating element, the first inlet of the first three-way valve, the first solenoid valve and the second solenoid valve are opened, and the circulating pump drives the cooled first insulating oil to circulate in the temperature regulating chamber, the heat exchange box and the first chamber.

2. The energy storage management evaluation method according to claim 1, characterized in that: The liquid cooling system comprises a first liquid cooling plate, a second liquid cooling plate and a liquid cooling channel arranged between adjacent simulated batteries, and the first liquid cooling plate is connected to the second liquid cooling plate through the liquid cooling channel; When the liquid cooling system is selected to perform temperature management on the battery module, the following steps are included: Introducing a first liquid at a first temperature into the first liquid cooling plate, so that the first liquid flows from a liquid inlet of the first liquid cooling plate to a liquid outlet of the first liquid cooling plate, and the first liquid flows from the first liquid cooling plate through the liquid cooling channel to the second liquid cooling plate; A second liquid at a second temperature is introduced into the second liquid cooling plate, so that the second liquid flows from the liquid inlet of the second liquid cooling plate to the liquid outlet of the second liquid cooling plate, and the second liquid flows from the second liquid cooling plate through the liquid cooling channel to the first liquid cooling plate.

3. The energy storage management evaluation method according to claim 1, characterized in that: Also includes: Disposing at least one real battery in the battery module; Disposing a heating element at the bottom of the real battery and electrically connecting the heating element to the control system; The control system activates the heating element to heat the real battery until the real battery experiences thermal runaway; The battery module is cooled by the air cooling system, the liquid cooling system and the immersion system, and the cooling effects of the air cooling system, the liquid cooling system and the immersion system when thermal runaway occurs in the real battery are determined by the first temperature sensor.

4. The energy storage management evaluation method according to claim 1, characterized in that: The real battery box is provided with a plurality of real batteries connected in series and / or in parallel; The temperature management strategy includes: Collecting the average battery temperature of the real battery box through a temperature collection system; When the average battery temperature exceeds a first preset temperature, according to the heating rate of the average battery temperature and the temperature management effects of the air cooling system, the liquid cooling system and the immersion system, one of the air cooling system, the liquid cooling system and the immersion system is selected to cool the real battery box; When the average battery temperature exceeds a second preset temperature, the real battery box is cooled by the air cooling system, the liquid cooling system and the immersion system; the second preset temperature is greater than the first preset temperature.

5. The energy storage management evaluation method according to claim 4, characterized in that: The real battery box is provided with an atomizing nozzle, the atomizing nozzle is connected to one end of a water pump, the other end of the water pump is connected to a liquid storage tank, and the liquid storage tank stores a cooling medium; The temperature management strategy also includes: Collecting the temperature of each real battery in the real battery box by the temperature collection system; When it is detected that the temperature of the real battery exceeds a preset threshold, the real battery is cooled by the air cooling system, the liquid cooling system and the immersion system, and the water pump sends the cooling medium in the liquid storage tank to the atomizing nozzle; The atomizing nozzle atomizes the cooling medium and then sprays it onto the surface of the real battery to cool the battery.

6. The energy storage management evaluation method according to claim 1, characterized in that: The step of obtaining a plurality of simulated batteries comprises: Get a simulated electrolyte with the same specific heat capacity as the real battery; A plurality of battery shells are obtained, and the simulated electrolyte is injected into each of the battery shells to form the simulated battery.

7. An energy storage management and evaluation device, characterized in that: It includes at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions that can be executed by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute the energy storage management evaluation method as described in any one of claims 1 to 6.

8. An electronic device, characterized in that: Including the energy storage management and evaluation device as described in claim 7.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the energy storage management evaluation method according to any one of claims 1 to 6.

Images