Heating device, energy storage system and heating control method and device

Abstract

The invention provides a heating device, an energy storage system and a heating control method and device, and belongs to the technical field of temperature control. The heating device comprises at least one battery unit, at least one conversion unit and at least one heating assembly, the first end and the second end of the battery unit are respectively connected with the first end and the second end of the conversion unit, the third end and the fourth end of the conversion unit are respectively connected with the first end and the second end of an external power supply, and the fifth end and the sixth end of the conversion unit are respectively connected with the heating assembly; wherein the conversion unit is used for enabling the battery unit or the external power supply to output working electric energy to the heating assembly according to working parameters of the battery unit and / or output parameters of the external power supply; and the heating assembly is used for converting the working electric energy into heat so as to increase the temperature of the battery module. According to the application, the effect of improving the flexibility and safety of heating the battery unit can be achieved.

Description

Technical Field

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

[0002] With the development of science and technology, energy storage systems are applied to various fields. In energy storage systems, some battery modules are often set up, and these battery modules are charged and discharged to achieve the corresponding functions of the energy storage system. However, the performance of the battery module is greatly affected by temperature, and the battery module cannot even be charged and discharged under low temperature conditions.

[0003] In the related art, the related technicians usually use liquid heating, resistance heating, and / or heating film heating to heat the battery module. For example, in the common heating method using a heating film, a battery module is generally used to power the heating film and the battery module directly controls the heating film so that the heating film can convert electrical energy into heat energy to increase the temperature of the battery module.

[0004] However, the solution of the related art can only simply increase the temperature of the battery module, but cannot adjust the specific heating strategy according to the actual working conditions of the battery module. Therefore, this solution has the problem of poor flexibility and safety. Summary of the invention

[0005] The purpose of the present application is to provide a heating device, an energy storage system, a heating control method and a device, which can improve the flexibility and safety of heating a battery cell.

[0006] The embodiment of the present application is implemented as follows:

[0007] According to a first aspect of an embodiment of the present application, a heating device is provided, comprising: the heating device comprises: at least one battery unit, at least one conversion unit, and at least one heating assembly;

[0008] The first end and the second end of the battery unit are connected to the first end and the second end of the conversion unit respectively, the third end and the fourth end of the conversion unit are connected to the first end and the second end of the external power supply respectively, and the fifth end and the sixth end of the conversion unit are connected to the heating assembly respectively;

[0009] Wherein, the conversion unit is used to enable the battery unit or the external power supply to output working power to the heating component according to the working parameters of the battery unit and / or the output parameters of the external power supply;

[0010] The heating component is used to convert the working electrical energy into heat to increase the temperature of the battery unit;

[0011] The operating parameters include at least one of the following: the temperature, charging current, and discharging current of the battery unit; the output parameters include at least the output voltage of the external power supply.

[0012] Optionally, the conversion unit includes: a resonant circuit, a first processing unit, a first switch, a second switch, and a pre-charging circuit;

[0013] The first end and the second end of the resonant circuit are connected to the first end and the second end of the battery unit respectively, the third end of the resonant circuit is connected to the first end of the first switch, the first end of the second switch and the first end of the pre-charging circuit respectively, and the fourth end of the resonant circuit is connected to the second end of the first switch and the second end of the second switch respectively;

[0014] The third end of the first switch is connected to the second end of the pre-charging circuit and the first end of the external power supply respectively, and the fourth end of the first switch is connected to the second end of the external power supply;

[0015] The third end and the fourth end of the second switch are respectively connected to the heating component;

[0016] Wherein, the first processing unit is used to control the resonant circuit to be turned off or on, the first switch to be turned on or off, and the second switch to be turned on or off according to the working parameter and the output parameter, so that the battery unit or the external power supply outputs the working power to the heating component;

[0017] The pre-charging circuit is used to reduce the voltage difference between the first end and the third end of the first switch.

[0018] Optionally, the heating device further comprises a second processing unit;

[0019] The first end of the second processing unit is connected to the third end of the battery unit, and the second end of the second processing unit is connected to the first processing unit;

[0020] Wherein, the second processing unit is used to obtain the working parameter and / or the output parameter, determine the target heating mode according to the working parameter and / or the output parameter, and send the target heating mode to the first processing unit; the target heating mode is used to indicate the device that supplies power to the heating component;

[0021] The first processing unit is used to control the resonant circuit to shut down or start up, the first switch to turn on or off, and the second switch to turn on or off according to the target heating method, so that the battery unit or the external power supply outputs the working power to the heating component.

[0022] Optionally, the conversion unit further includes: a temperature detection unit and an electric energy parameter detection unit;

[0023] The temperature detection unit and the electric energy parameter detection unit are respectively connected to the first processing unit;

[0024] Wherein, the temperature detection unit is used to detect the temperature and send the temperature to the first processing unit;

[0025] The electric energy parameter detection unit is used to detect the charging current, the discharging current and / or the output parameter, and send the charging current, the discharging current and / or the output parameter to the first processing unit;

[0026] The first processing unit is used to determine a target heating mode according to the temperature, the charging current, the discharging current and / or the output parameter;

[0027] The first processing unit is also used to control the resonant circuit to shut down or start up, the first switch to turn on or off, and the second switch to turn on or off according to the target heating method, so that the battery unit or the external power supply outputs the working power to the heating component.

[0028] A second aspect of an embodiment of the present application provides an energy storage system, which includes at least an external power supply and any heating device provided in the first aspect.

[0029] A third aspect of the embodiments of the present application provides a heating control method, which is applied to any heating device provided in the first aspect above; the method comprises:

[0030] Obtaining the temperature of a battery cell in the heating device;

[0031] When the temperature satisfies the first temperature range, determining that working power needs to be output to the heating component, and obtaining a target current of the battery unit; the target current includes a charging current or a discharging current;

[0032] Determining a heating mode to be performed according to the temperature and the target current;

[0033] According to the heating mode to be executed, the conversion unit in the heating device is controlled so that the battery unit or the external power supply outputs working power to the heating component.

[0034] Optionally, determining a heating mode to be performed according to the temperature and the target current includes:

[0035] Determine whether the temperature satisfies a second temperature interval; the maximum value of the second temperature interval is equal to the maximum value of the first temperature interval, and the minimum value of the second temperature interval is greater than the minimum value of the first temperature interval;

[0036] If so, determining whether the target current satisfies a first current interval within a first preset time period;

[0037] If so, the first preset heating mode is used as the heating mode to be executed; the device indicated by the first preset heating mode to output working power to the heating component is determined by the charging and discharging state of the battery unit.

[0038] Optionally, after determining whether the temperature satisfies the second temperature interval, the method further includes:

[0039] If not, determining whether the target current satisfies a second current interval within a second preset time period;

[0040] If yes, determine whether the temperature satisfies a third temperature interval; the maximum value of the third temperature interval is equal to the maximum value of the second temperature interval, and the minimum value of the third temperature interval is greater than the minimum value of the second temperature interval;

[0041] If the temperature does not satisfy the third temperature range, the second preset heating mode is used as the heating mode to be executed; the second preset heating mode is used to indicate that the external power supply outputs working power to the heating component.

[0042] Optionally, after determining whether the temperature satisfies a third temperature interval, the method further includes:

[0043] If the temperature satisfies the third temperature interval, determining whether the output parameter of the external power supply satisfies a preset voltage interval;

[0044] If yes, the second preset heating mode is used as the heating mode to be executed;

[0045] If not, the third preset heating mode is used as the heating mode to be executed; the third preset heating mode is used to indicate that the battery unit outputs working power to the heating component.

[0046] Optionally, when the heating mode to be performed is the first preset heating mode, controlling the conversion unit in the heating device according to the heating mode to be performed so that the battery unit or the external power supply outputs working power to the heating component includes:

[0047] Controlling the second switch in the conversion unit to be disconnected;

[0048] Controlling a first switch in the conversion unit to close, and controlling a resonant circuit in the conversion unit to soft-start;

[0049] controlling the second switch to close;

[0050] If it is determined that the battery unit is in a discharge state, the battery unit outputs the working electrical energy to the heating component through the resonant circuit;

[0051] If it is determined that the battery unit is in a charging state, the external power source outputs the operating power to the heating component through the first switch.

[0052] Optionally, when the heating mode to be performed is the second preset heating mode, controlling the conversion unit in the heating device according to the heating mode to be performed so that the battery unit or the external power supply outputs working power to the heating component includes:

[0053] Acquire a voltage difference between a first terminal and a third terminal of a first switch in the conversion unit;

[0054] When the voltage difference is less than a preset difference, controlling the first switch to close;

[0055] The second switch in the conversion unit is controlled to be closed.

[0056] Optionally, when the heating mode to be performed is the third preset heating mode, controlling the conversion unit in the heating device according to the heating mode to be performed so that the battery unit or the external power supply outputs working power to the heating component includes:

[0057] Controlling the first switch in the conversion unit to be disconnected;

[0058] Controlling the soft start of the resonant circuit in the conversion unit;

[0059] When it is determined that the resonant circuit has been started up, the second switch in the conversion unit is controlled to be closed.

[0060] Optionally, after controlling the conversion unit in the heating device according to the heating mode to be executed so that the battery unit or the external power supply outputs working power to the heating component, the method further includes:

[0061] Continuously acquiring the real-time temperature and real-time current of the battery unit and / or the real-time output parameters of the external power source;

[0062] Determine the heating mode to be updated at the current moment according to the real-time temperature, the real-time current and / or the output parameter;

[0063] The conversion unit is controlled to adjust the working state of the heating component according to the heating mode to be updated.

[0064] In a fourth aspect of the embodiments of the present application, a heating control device is provided, the device comprising:

[0065] A first acquisition module, used to acquire the temperature of the battery unit in the heating device;

[0066] A second acquisition module is used to determine that the heating component currently needs to output working power when the temperature meets the first temperature range, and to obtain a target current of the battery unit; the target current includes a charging current or a discharging current;

[0067] A control module is used to control a conversion unit in the heating device according to the temperature and the target current so that the battery unit or the external power supply outputs working power to the heating component.

[0068] According to a fifth aspect of an embodiment of the present application, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the heating control method described in the third aspect is implemented.

[0069] The beneficial effects of the embodiments of the present application include:

[0070] A heating device provided by an embodiment of the present application comprises at least one battery cell, at least one conversion unit, and at least one heating component, wherein the first end and the second end of the battery cell are connected to the first end and the second end of the conversion unit, respectively, the third end and the fourth end of the conversion unit are connected to the first end and the second end of an external power source, respectively, and the fifth end and the sixth end of the conversion unit are connected to the heating component, respectively.

[0071] Among them, the conversion unit enables the battery cell or the external power supply to output working power to the heating component according to the working parameters of the battery cell and / or the output parameters of the external power supply; the heating component converts the working power into heat to increase the temperature of the battery cell.

[0072] The heating device can not only flexibly decide whether to heat the battery cell according to the actual working condition of the battery cell, but also flexibly adjust the power supply for the heating component. In addition, since the external power supply can also be selected to power the heating component, the risk of battery cell loss or other safety accidents caused by long-term use of the battery cell to power the heating component can be avoided.

[0073] In this way, the flexibility and safety of heating the battery cells can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0074] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0075] Figure 1 A schematic diagram of the structure of a first heating device provided in an embodiment of the present application;

[0076] Figure 2 A schematic diagram of the structure of a second heating device provided in an embodiment of the present application;

[0077] Figure 3 A schematic diagram of the structure of a third heating device provided in an embodiment of the present application;

[0078] Figure 4 A schematic diagram of the structure of a fourth heating device provided in an embodiment of the present application;

[0079] Figure 5 A schematic diagram of the structure of an energy storage system provided in an embodiment of the present application;

[0080] Figure 6 A flow chart of a first heating control method provided in an embodiment of the present application;

[0081] Figure 7 A flow chart of a second heating control method provided in an embodiment of the present application;

[0082] Figure 8 A flowchart of a third heating control method provided in an embodiment of the present application;

[0083] Fig. 9 A flowchart of a fourth heating control method provided in an embodiment of the present application;

[0084] Fig.10 A schematic diagram of the structure of a heating control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0085] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0086] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0087] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0088] In the description of the present application, it should be noted that the terms "first", "second", "third", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0089] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0090] In the related art, the related technicians usually use liquid heating, resistance heating, and / or heating film heating to heat the battery module. For example, in the common method of heating using a heating film, the battery module is generally used to power the heating film and the battery module directly controls the heating film so that the heating film can convert electrical energy into thermal energy to increase the temperature of the battery module. However, the solution of the related art can only simply increase the temperature of the battery module, and cannot adjust the specific heating strategy according to the actual working conditions of the battery model.

[0091] It is understandable that if the temperature of the battery module is simply increased without considering the actual working conditions, the battery temperature may be too high, which may damage the service life of the battery cell or cause other safety accidents. Therefore, this solution has the problem of poor flexibility and safety.

[0092] In addition, since the solution of the related art is directly powered by the battery module, when the battery core cannot work normally in a low temperature environment, there may be a problem of not being able to provide an effective working voltage to the heating film. Moreover, long-term use of the battery module for power supply may also lead to a problem of reduced battery efficiency.

[0093] To this end, an embodiment of the present application provides a heating device, by setting at least one battery cell, at least one conversion unit, and at least one heating component in the heating device, specifically connecting the first end and the second end of the battery cell to the first end and the second end of the conversion unit respectively, connecting the third end and the fourth end of the conversion unit to the first end and the second end of the external power supply respectively, and connecting the fifth end and the sixth end of the conversion unit to the heating component respectively. Then, the conversion unit causes the battery cell or the external power supply to output working electrical energy to the heating component according to the working parameters of the battery cell and / or the output parameters of the external power supply; and the heating component converts the working electrical energy into heat to increase the temperature of the battery cell. In this way, the effect of improving the flexibility and safety of heating the battery cell can be achieved.

[0094] The embodiments of the present application are described by taking the heating device used in the energy storage system as an example, but it does not mean that the embodiments of the present application can only be used to heat the battery module in the energy storage system. The embodiments of the present application are not limited to this.

[0095] The heating device provided in the embodiment of the present application is explained in detail below.

[0096] Figure 1 This is a schematic diagram of the structure of a heating device provided in the present application. The heating device 100 can be applied to an energy storage system or any other system that can provide an external power source. Figure 1 An embodiment of the present application provides a heating device 100 , which includes: at least one battery cell 101 , at least one conversion unit 102 , and at least one heating component 103 .

[0097] The first and second ends of the battery cell 101 are connected to the first and second ends of the conversion unit 102 respectively, the third and fourth ends of the conversion unit 102 are connected to the first and second ends of the external power supply respectively, and the fifth and sixth ends of the conversion unit 102 are connected to the heating component 103 respectively.

[0098] The conversion unit 102 is used to enable the battery unit 101 or the external power source to output working power to the heating component 103 according to the working parameters of the battery unit 101 and / or the output parameters of the external power source.

[0099] The heating component 103 is used to convert the working electrical energy into heat to increase the temperature of the battery cell 101 .

[0100] Optionally, the operating parameter includes at least one of the following: temperature, charging current, and discharging current of the battery cell 101 .

[0101] The temperature may refer to the cell temperature of the battery cell 101. The charging current may refer to the current value input to the battery cell 101 when the battery cell 101 is charged, and the discharging current may refer to the current value output from the battery cell 101 when the battery cell 101 is discharged.

[0102] Optionally, the battery unit 101 may be a high voltage battery. Furthermore, the battery unit 101 may include only one battery pack or may include a plurality of battery packs connected to each other. This embodiment of the present application does not limit this.

[0103] The conversion unit 102 may be a conversion device with certain processing, calculation, and control capabilities. For example, the conversion unit 102 may be a direct current to direct current (DCDC) converter.

[0104] For example, the battery cell 101 and the conversion unit 102 may be respectively used as an independent device, or the battery cell 101 and the conversion unit 102 may be integrated into the same module, which is not limited in the embodiments of the present application.

[0105] Optionally, the external power source may be any power source that can provide an operating voltage. For example, if the heating device 100 is applied to an energy storage system, the external power source may specifically refer to a device in the energy storage system that outputs electrical energy to the outside, for example, the external power source may be a power conversion system (PCS).

[0106] Optionally, the output parameter includes at least the output voltage of the external power supply, and may also include other parameters of associated components of the external power supply, which is not limited in the embodiment of the present application.

[0107] The output voltage may refer to the voltage applied by the output end of the external power supply to the third end and the fourth end of the conversion unit 102. For example, when the external power supply can supply power normally or can output the working voltage to the conversion unit 102 and the heating component 103 normally, the output voltage is generally greater than or equal to 350V and less than or equal to 450V.

[0108] Optionally, the heating component 103 may refer to any device that can convert electrical energy into thermal energy based on the electrothermal effect. For example, the heating component 103 may be a heating film, a resistance wire, or other device, which is not limited in the embodiment of the present application.

[0109] The working electric energy refers to electric energy whose voltage level, current size, and power size can meet the parameters required for the normal operation of the heating component 103. In the embodiment of the present application, the conversion unit 102 can convert the electric energy output by the battery unit 101 or the external power supply into the working electric energy and then transmit it to the heating component 103, or the battery unit 101 or the external power supply can directly output the working electric energy that meets the requirements of the heating component 103 and then transmit it to the heating component 103 through the conversion unit 102. The embodiment of the present application does not limit this.

[0110] In this embodiment, the heating device 100 may include only one battery unit 101, one conversion unit 102 and one heating component 103. Figure 1 The structure shown in FIG. may also include a battery unit 101, a conversion unit 102 and a plurality of heating components 103, in which case the fifth terminal and the sixth terminal of the conversion unit 102 are respectively connected to the positive and negative power supply terminals of each heating component 103, so that the conversion unit 102 can provide working power to each heating component 103.

[0111] In addition, the heating device 100 may also include a plurality of battery cells 101, a plurality of conversion units 102, and a plurality of heating components 103. In this case, each battery cell 101 is connected to each conversion unit 102 in a one-to-one correspondence, and each battery cell 101 corresponds to at least one heating component 103 for heating, and each conversion unit 102 is respectively connected to a corresponding heating component 103. At the same time, each conversion unit 102 can communicate directly or indirectly with each other so as to obtain the working conditions of different conversion units 102.

[0112] It is worth noting that the operating parameter and / or the output parameter can be directly acquired and processed by the conversion unit 102, and then the conversion unit 102 determines whether the heating component 103 is currently powered by the battery unit 101 or by the external power supply. Other processing units with processing, calculation, control and other functions connected to the conversion unit 102 can also acquire and process the operating parameter and / or the output parameter, and then generate corresponding instructions to send to the conversion unit 102. This embodiment of the application is not limited to this.

[0113] It is worth noting that the working principle of the heating device 100 provided in the embodiment of the present application is as follows: in the power-off state, that is, the battery unit 101 is not charged or discharged, then the conversion unit 102 is also in a dormant state, and the heating component 103 has no power input and does not generate heat.

[0114] When the battery cell 101 needs to enter a charging state or a discharging state, if it is determined based on the working parameters that the battery cell 101 needs to be heated, it can be further determined based on the output parameters that the battery cell 101 or the external power supply supplies power to the heating component 103, and then the conversion unit 102 can perform corresponding actions to enable the battery cell 101 or the external power supply to output the working power to the heating component 103.

[0115] If it is determined based on the working parameters that the battery cell 101 does not need to be heated at present, the conversion unit 102 does not output working power to the heating component 103 .

[0116] Generally, since the operation of the battery cell 101 is greatly affected by temperature, the performance of the battery cell 101 will be greatly reduced in a low temperature environment, or even the battery cell 101 cannot be charged or discharged. Therefore, when the temperature of the battery cell 101 is low, it can be determined that the battery cell 101 needs to be heated.

[0117] Specifically, when the output parameter indicates that the external power supply can provide effective power, the external power supply can be used to power the heating component 103. When the output parameter indicates that the external power supply cannot provide effective power, but the battery unit 101 can provide effective power, the battery unit 101 can be used to power the heating component 103. In this way, it can be ensured that the external power supply is used first when the external power supply has power, thereby reducing the cell loss of the battery unit 101 and reducing the risk of safety accidents of the battery unit 101.

[0118] It is understandable that the heating device 100 provided in the embodiment of the present application can heat the battery cell 101 through the heating component 103 when the temperature of the battery cell 101 is low, so that the charging and discharging efficiency of the battery cell 101 in a low temperature environment can be improved. At the same time, in the embodiment of the present application, the conversion unit 102 determines whether the battery cell 101 needs to be heated according to the working parameters such as the temperature, charging current, and discharging current of the battery cell 101, and can adjust the power supply for the heating component 103 according to the output parameters of the external power supply.

[0119] It should be noted that when the temperature of the battery cell 101 is high, the heating device 100 can stop supplying power to the heating component 103 and thus stop heating the battery cell 101. In this way, the purpose of heating the battery cell 101 according to its actual working condition is achieved.

[0120] As can be seen from the above, the heating device 100 provided in the embodiment of the present application can not only flexibly determine whether to heat the battery cell 101 according to the actual working condition of the battery cell 101, but also flexibly adjust the power supply for the heating component 103. In addition, since the external power supply is preferentially selected to power the heating component 103 when the external power supply can be used, the risk of battery cell loss or other safety accidents caused by long-term use of the battery cell 101 to power the heating component 103 can also be avoided.

[0121] In this way, the flexibility and safety of heating the battery cell 101 can be improved.

[0122] For a possible implementation, see Figure 2 The conversion unit 102 includes: a resonant circuit 1021, a first processing unit 1022, a first switch K1, a second switch K2, and a pre-charging circuit 1023.

[0123] The first end and the second end of the resonant circuit 1021 are respectively connected to the first end and the second end of the battery cell 101, the third end of the resonant circuit 1021 is respectively connected to the first end of the first switch K1, the first end of the second switch K2 and the first end of the pre-charging circuit 1023, and the fourth end of the resonant circuit 1021 is respectively connected to the second end of the first switch K1 and the second end of the second switch K2.

[0124] The third end of the first switch K1 is connected to the second end of the pre-charging circuit 1023 and the first end of the external power source respectively, and the fourth end of the first switch K1 is connected to the second end of the external power source.

[0125] The third end and the fourth end of the second switch K2 are connected to the heating assembly 103 respectively.

[0126] Among them, the first processing unit 1022 is used to control the resonant circuit 1021 to shut down or start, the first switch K1 to turn on or off, and the second switch K2 to turn on or off according to the working parameters and the output parameters, so that the battery unit 101 or the external power supply outputs the working power to the heating component 103.

[0127] Optionally, the resonant circuit 1021 is used for soft starting and also has the function of adjusting the voltage of the electric energy output by the battery unit 101 , for example, the electric energy output by the battery unit 101 can be boosted.

[0128] Exemplarily, the resonant circuit 1021 may refer to an LLC circuit, which may specifically include an inductor, a capacitor, and other peripheral circuits (such as a switch tube, a transformer winding, etc.) for implementing corresponding functions. The resonant circuit 1021 may be any component that implements functions such as soft start, and the specific components and connection relationships are not described in detail in the embodiments of this application.

[0129] Optionally, the first switch K1 and the second switch K2 may be any possible switch devices, such as relays, which is not limited in the embodiment of the present application.

[0130] Optionally, the pre-charging circuit 1023 is used to reduce the voltage difference between the first terminal and the third terminal of the first switch K1.

[0131] Continue to see Figure 2 , the pre-charging circuit 1023 may include a resistor R and a diode D. When the external power source applies a voltage to the conversion unit 102, a certain voltage will exist at the third end and the first end of the first switch K1. However, if the pre-charging circuit 1023 is not provided, then the voltage at the first end of the first switch K1 is 0 when the external power source applies a voltage to the conversion unit 102. It can be seen that the provision of the pre-charging circuit 1023 can specifically reduce the voltage difference between the first end and the third end of the first switch K1 when the external power source applies a voltage to the conversion unit 102. In this way, it is possible to avoid the problem that a large inrush current is generated when the first switch K1 is closed due to a large voltage difference between the two ends, causing the heating device 100 and / or the conversion unit 102 to trigger overcurrent protection.

[0132] Optionally, the first processing unit 102 may be a digital signal processing chip (Digital Signal Processing, DSP for short), or any other processing unit having processing, calculation, control and other functions, which is not limited in the embodiment of the present application.

[0133] It should be noted that the first processing unit 1022 controls the operation of shutting down or starting up the resonant circuit 1021, turning on or off the first switch K1, and turning on or off the second switch K2 according to the working parameter and the output parameter, which can be specifically performed in the following manner:

[0134] In the first mode, the temperature in the working parameter is high, and it is determined that heating is not required. At this time, the first processing unit 1022 can control the second switch K2 to turn off to ensure that the heating component 103 will not be powered on. In addition, it can be determined whether to start the resonant circuit 1021 and turn on the first switch K1 according to the charging current or discharging current in the working parameter.

[0135] In the second mode, if the temperature in the working parameter is low, it is determined that heating is required, and the conversion unit 102 can work normally at this time, then the first processing unit 1022 can first control the first switch K1 to be turned on, and then control the resonant circuit 1021 to soft start, and then turn on the second switch K2. Then, when the battery unit 101 is in a discharging state, the heating component 103 is powered by the battery unit 101 and the resonant circuit 1021; when the battery unit 101 is in a charging state, the heating component 103 is powered by the external power supply and the first switch K1.

[0136] In addition, if the temperature in the working parameter is low, it is determined that heating is required, and the conversion unit 102 cannot work normally at this time, then it can be further determined whether the external power supply can supply power normally based on the output voltage indicated by the output parameter.

[0137] When it is determined that the external power supply can supply power normally, the third method can be used: the first processing unit 1022 can first control the first switch K1 to be turned on, and then turn on the second switch K2, so that the external power supply can supply power to the heating component 103.

[0138] In one possible manner, when the control is performed in the third manner, before the first switch K1 is turned on, the voltage difference between the first end and the third end of the first switch K1 may be detected, and then the first switch K1 may be turned on after ensuring that the voltage difference is small. In this way, the problem of a large inrush current when the first switch K1 is turned on may be avoided.

[0139] When it is determined that the external power supply cannot supply power normally, the fourth method can be used. The first processing unit 1022 can specifically control the first switch K1 to turn off, and then control the resonant circuit 1021 to soft start, and then turn on the second switch K2, so that the battery unit 101 can supply power to the heating component 103.

[0140] It can be understood that by controlling other components in the conversion unit 102 according to the working parameters and the output parameters by the first processing unit 1022, it is possible to flexibly output the working power to the heating component 103 according to actual working conditions while ensuring the safety of the heating device 100.

[0141] Continue to see Figure 2 , the conversion unit 102 also includes an output capacitor C, which can stabilize the power output and reduce voltage fluctuations. In addition, the second switch K2 can also be used to close when the voltage difference between the first end and the third end of the first switch K1 is large, and last for a certain period of time to quickly release the residual voltage in the output capacitor C. In this way, the voltage difference between the first end and the third end of the first switch K1 can be reduced to reduce the impact current that may occur when the first switch K1 is closed.

[0142] For a possible implementation, see Figure 3 The heating device 100 also includes a second processing unit 104 .

[0143] A first end of the second processing unit 104 is connected to the third end of the battery unit 101 , and a second end of the second processing unit 104 is connected to the first processing unit 1022 .

[0144] The second processing unit 104 is used to obtain the working parameter and / or the output parameter, determine the target heating method according to the working parameter and / or the output parameter, and send the target heating method to the first processing unit 1022 .

[0145] The first processing unit 1022 is used to control the resonant circuit 1021 to shut down or start, the first switch K1 to turn on or off, and the second switch K2 to turn on or off according to the target heating method, so that the battery unit 101 or the external power supply outputs the working power to the heating component 103.

[0146] Optionally, the second processing unit 104 may refer to a battery management system (BMS for short).

[0147] Optionally, the target heating mode can be used to indicate a device that supplies power to the heating component 103, and the target heating mode can also be used to indicate a specific mode of turning on or off each component in the control conversion unit 102. That is, the target heating mode corresponds to the four modes of control by the first processing unit 102 provided in the above embodiment. The strategy of the first processing unit 1022 controlling according to the target heating mode can be specifically referred to the above description, and the embodiment of the present application will not be repeated again.

[0148] It is worth noting that, since the BMS has all the information about the battery, the BMS can better determine the target heating method according to the working parameter and / or the output parameter, thereby improving the efficiency and performance of the heating device 100 .

[0149] For a possible implementation, see Figure 4 The conversion unit 102 also includes: a temperature detection unit 1024 and an electric energy parameter detection unit 1025 .

[0150] The temperature detection unit 1024 and the electric energy parameter detection unit 1025 are connected to the first processing unit 1022 respectively.

[0151] The temperature detection unit 1024 is used to detect the temperature of the battery unit 101 and send the temperature to the first processing unit 1022 .

[0152] The electric energy parameter detection unit 1025 is used to detect the charging current, the discharging current and / or the output parameter, and send the charging current, the discharging current and / or the output parameter to the first processing unit 1022 .

[0153] The first processing unit 1022 is used to determine a target heating method according to the temperature, the charging current, the discharging current and / or the output parameter.

[0154] The first processing unit 1022 is also used to control the resonant circuit 1021 to shut down or start, the first switch K1 to turn on or off, and the second switch K2 to turn on or off according to the target heating method, so that the battery unit 101 or the external power supply outputs the working power to the heating component 103.

[0155] Optionally, the temperature detection unit 1024 may be any device capable of detecting temperature, and the electric energy parameter detection unit may be any device capable of detecting parameters such as current and voltage, which is not limited in the embodiments of the present application.

[0156] It is worth noting that, in this embodiment, the temperature detection unit 1024 and the electric energy parameter detection unit 1025 respectively collect the working parameter and the output parameter, and then the first processing unit 1022 determines the target heating mode according to the working parameter and / or the output parameter, so that there is no need to set up an additional processing unit, and only the first processing unit 102 completes the operation of calculation, execution, and control. In this way, the design can be simplified to a certain extent.

[0157] Figure 5 is a schematic diagram of the structure of an energy storage system provided in an embodiment of the present application, see Figure 5 An embodiment of the present application provides an energy storage system C, which includes at least an external power supply and a heating device 100 provided in any of the above embodiments.

[0158] It is worth noting that the energy storage system C can perform all operations that the heating device 100 provided in the aforementioned embodiment can perform, and its implementation principles and technical effects are similar, which will not be repeated here.

[0159] Figure 6 This is a flow chart of a heating control method provided by the present application. The method can be applied to the heating device provided by any of the above embodiments, and the method can be specifically executed by the above first processing unit alone, or can be executed by the above first processing unit and the above second processing unit together, and the embodiments of the present application do not limit this. It can be understood that in the case where the first processing unit and the second processing unit are jointly executed, the second processing unit can be responsible for the acquisition, judgment, calculation and other processes, and then the second processing unit sends the calculation results to the first processing unit, and the first processing unit controls the various components in the conversion unit.

[0160] Combined with the above Figure 1-Figure 4 , continue to see Figure 6 , an embodiment of the present application provides a heating control method, the method comprising:

[0161] Step 21: Obtain the temperature of the battery cell in the heating device.

[0162] Optionally, the battery cell may be the battery cell 101 described above.

[0163] It is worth noting that the temperature can be obtained by the second processing unit or by the temperature detection unit. The specific setting can be made according to the circuit structure of the heating device, and the embodiment of the present application does not limit this.

[0164] Step 22: When the temperature satisfies the first temperature range, determine that the heating component currently needs to output working power, and obtain the target current of the battery unit.

[0165] Optionally, the first temperature range may be preset by relevant technicians according to the parameters of the battery unit and / or actual working conditions.

[0166] Generally, when the temperature satisfies the first temperature range, it indicates that the working performance of the battery cell (such as charging and discharging efficiency) may be affected, that is, the battery cell needs to be heated.

[0167] Optionally, the target current includes a charging current or a discharging current. It is understandable that if the target current is a charging current, it may indicate that the battery cell is currently in a charging state; if the target current is a discharging current, it may indicate that the battery cell is currently in a discharging state.

[0168] It is worth noting that when the temperature meets the first temperature range, it can be determined that the battery cell needs to be heated at present, and then the target current can be obtained, which can not only accurately determine the current charge and discharge state of the battery cell, but also determine the current magnitude of the battery cell when charging or discharging. In this way, the actual working condition of the battery cell can be better determined, which is convenient for subsequent heating according to the actual working condition of the battery cell.

[0169] Step 23: Control the conversion unit in the heating device according to the temperature and the target current, so that the battery unit or the external power supply outputs working power to the heating component.

[0170] Specifically, when the conversion unit is controlled so that the battery unit or the external power supply outputs working power to the heating component, the resonant circuit, the first switch, and the second switch in the conversion unit can be specifically controlled.

[0171] Further, when controlling the conversion unit, the power supply to the heating component can be determined according to the output parameter of the external power supply. For example, when the output parameter indicates that the external power supply can provide effective electrical energy, the external power supply can be used preferentially to power the heating component. This embodiment of the application is not limited to this.

[0172] It is worth noting that the heating control method provided in the embodiment of the present application controls the heating of the battery cell according to the temperature, charging current, discharging current and other parameters of the battery cell. In this way, when the temperature of the battery cell is low, the battery cell can be heated by supplying power to the heating component, which can ensure the charging and discharging efficiency of the battery cell under low temperature conditions. At the same time, the power supply for the heating component can be adjusted. For example, when the external power supply can be supplied, the external power supply is preferentially selected to supply power to the heating component. In this way, it can be avoided that the heating component can only be powered by the battery cell for a long time, thereby reducing the battery cell loss of the battery cell and reducing the risk of safety accidents of the battery cell.

[0173] In this way, the flexibility and safety of heating the battery cell can be improved.

[0174] For a possible implementation, see Figure 7 , according to the temperature and the target current, controlling the conversion unit in the heating device so that the battery unit or the external power supply outputs working power to the heating component, including:

[0175] Step 231: Determine a heating method to be performed according to the temperature and the target current.

[0176] Optionally, the heating mode to be executed can be used to indicate that the battery unit needs to be heated, and can also be used to indicate how to power the heating component. This embodiment of the present application does not limit this.

[0177] It should be understood that the heating mode to be executed corresponds to the target heating mode mentioned in the above embodiment, that is, the heating mode to be executed may also include the four modes controlled by the first processing unit 102 provided in the above embodiment. The embodiments of the present application are not described in detail here.

[0178] Step 232: Control the conversion unit in the heating device according to the heating mode to be executed so that the battery unit or the external power supply outputs working power to the heating component.

[0179] It is worth noting that after accurately determining how to heat the battery cell based on the working parameters of the battery cell, the conversion unit is controlled according to the heating method to be executed. In this way, it is convenient to heat it accurately according to the actual working conditions, thereby improving the flexibility and safety of heating the battery cell.

[0180] For a possible implementation, see Figure 8 , determining a heating method to be performed according to the temperature and the target current, including:

[0181] Step 233: Determine whether the temperature satisfies the second temperature range.

[0182] Optionally, it may be preset by relevant technicians according to the parameters of the battery unit and / or actual working conditions.

[0183] Generally, the maximum value of the second temperature interval is equal to the maximum value of the first temperature interval, and the minimum value of the second temperature interval is greater than or equal to the minimum value of the first temperature interval.

[0184] That is, the second temperature interval is a sub-interval of the first temperature interval. Exemplarily, assuming that the first temperature interval is [-∞, 5)°C, the second temperature interval may be [0, 5)°C.

[0185] It is worth noting that if the conditions are met, it indicates that the temperature is low, but the battery cell can be charged and discharged normally at this temperature, and the conversion unit can work normally. If the conditions are not met, it indicates that the temperature is low, and the battery cell may not be charged and discharged normally at this temperature, and the conversion unit cannot work normally.

[0186] Step 234: If satisfied, determine whether the target current satisfies the first current interval within a first preset time period.

[0187] Optionally, the first preset duration can be set according to actual needs, and can generally be 10s or any other possible duration, which is not limited in the embodiment of the present application.

[0188] Optionally, the first current interval is also set by relevant technicians according to the parameters of the battery cell during normal operation. For example, the first current interval may refer to a current greater than 4 A. In addition, since the heat release and performance of the battery cell are different during charging and discharging, different first current intervals may be set for the discharge state and the charge state, respectively.

[0189] Step 235: If yes, the first preset heating method is used as the heating method to be executed.

[0190] Optionally, the device indicated by the first preset heating mode to output working power to the heating component is determined by the charge and discharge state of the battery unit.

[0191] Exemplarily, if the battery cell is in a charging state, the external power source supplies power to the heating component. If the battery cell is in a discharging state, the battery cell supplies power to the heating component.

[0192] Specifically, the first preset heating mode corresponds to the second mode of controlling the first processing unit 102 provided in the above embodiment.

[0193] It is worth noting that if the target current satisfies the first current interval within the first preset time, it indicates that the battery unit is being charged or discharged. Furthermore, since the temperature satisfies the second interval, it can be determined that the temperature is low and the battery unit and the conversion unit can work normally.

[0194] In a possible implementation, see Figure 8 After determining whether the temperature satisfies the second temperature range, the method further includes:

[0195] Step 236: If not, determine whether the target current satisfies the second current interval within a second preset time period.

[0196] Optionally, the second preset duration can be set according to actual needs, and can generally be 3s or any other possible duration, which is not limited in the embodiment of the present application.

[0197] Optionally, the second current interval is also set by relevant technicians according to the parameters of the battery unit during normal operation. For example, the second current interval may refer to a current greater than 1 A. In addition, different second current intervals may be set for the discharge state and the charge state, respectively.

[0198] Step 237: If yes, determine whether the temperature satisfies the third temperature range.

[0199] Optionally, the maximum value of the third temperature interval is equal to the maximum value of the second temperature interval, and the minimum value of the third temperature interval is greater than the minimum value of the second temperature interval. Exemplarily, if the second temperature interval is [0, 5)°C, then the third temperature interval may be (-10, 0)°C.

[0200] It is worth noting that if the third temperature range is met, it means that the temperature is low and the low temperature protection of the BMS has been triggered. The battery cell can only be charged and discharged at a low efficiency at this temperature, and the conversion unit cannot work normally. If the third temperature range is not met, it means that the temperature is low and the low temperature protection of the battery cell has been triggered. The battery cell cannot be charged and discharged at this temperature, and the conversion unit cannot work normally.

[0201] Step 238: If the temperature does not satisfy the third temperature range, the second preset heating method is used as the heating method to be executed.

[0202] Optionally, the second preset heating mode is used to indicate that the external power supply outputs working power to the heating component.

[0203] Specifically, the second preset heating mode corresponds to the third mode of controlling the first processing unit 102 provided in the above embodiment.

[0204] In a possible implementation, see Figure 8 After determining whether the temperature satisfies the third temperature interval, the method further includes:

[0205] Step 239: If the temperature satisfies the third temperature range, determine whether the output parameter of the external power source satisfies a preset voltage range.

[0206] Optionally, the preset voltage interval is set by relevant technical personnel according to actual needs, and generally refers to a voltage interval that enables the heating component to work normally. For example, the preset voltage interval may be [350, 450]V.

[0207] It is worth noting that if the output parameter satisfies the preset voltage range, it indicates that the external power supply can normally supply power to the heating component. Otherwise, it indicates that the external power supply cannot normally supply power to the heating component.

[0208] Step 2310: If yes, the second preset heating method is used as the heating method to be executed.

[0209] In this way, it can be ensured that the external power supply is used first when the external power supply has power, thereby reducing the battery cell loss of the battery unit and reducing the risk of safety accidents of the battery unit.

[0210] Step 2311: If not, the third preset heating method is used as the heating method to be executed.

[0211] Optionally, the third preset heating mode is used to indicate that the battery unit outputs working power to the heating component.

[0212] Specifically, the third preset heating mode corresponds to the fourth mode of controlling the first processing unit 102 provided in the above embodiment.

[0213] It should be noted that, as can be seen from the above, the heating control method provided in the embodiment of the present application can flexibly select the way to heat the battery cell and power the heating component according to the actual values ​​of parameters such as the temperature, charging current, and discharging current of the battery cell. In this way, not only can the battery cell be heated when the temperature of the battery cell is low to ensure the charging and discharging efficiency of the battery cell under low temperature conditions; but it can also avoid having to use the battery cell for a long time to power the heating component, thereby reducing the battery cell loss of the battery cell and reducing the risk of safety accidents of the battery cell.

[0214] In this way, the flexibility and safety of heating the battery cell can be improved.

[0215] It is understandable that if other situations except step 231 to step 2311 occur, it indicates that there is no need to heat the battery cell, and there is no need to output working power to the heating component.

[0216] In a possible implementation, when the heating mode to be performed is the first preset heating mode, controlling the conversion unit in the heating device according to the heating mode to be performed so that the battery unit or the external power supply outputs working power to the heating component includes:

[0217] The second switch in the conversion unit is controlled to be turned off.

[0218] The first switch in the conversion unit is controlled to be closed, and the resonant circuit in the conversion unit is controlled to be soft-started.

[0219] The second switch is controlled to be closed.

[0220] If it is determined that the battery unit is in a discharge state, the battery unit outputs the operating electrical energy to the heating component through the resonant circuit.

[0221] If it is determined that the battery unit is in a charging state, the external power supply outputs the operating power to the heating component through the first switch.

[0222] It is worth noting that the second switch is disconnected before the resonant circuit is soft-started. In this way, the problem of soft-start failure of the resonant circuit due to load can be avoided, thereby ensuring the practicability and reliability of the method.

[0223] In a possible implementation, when the heating mode to be performed is the second preset heating mode, controlling the conversion unit in the heating device according to the heating mode to be performed so that the battery unit or the external power supply outputs working power to the heating component includes:

[0224] A voltage difference between a first terminal and a third terminal of a first switch in the conversion unit is obtained.

[0225] When the voltage difference is less than a preset difference, the first switch is controlled to be closed.

[0226] The second switch in the conversion unit is controlled to be closed.

[0227] Optionally, the preset difference value may be set according to actual needs and / or actual parameters of each component. For example, the preset difference value may be | ±30V |。

[0228] It is worth noting that if the voltage difference is large, a large inrush current may occur when the first switch is closed, so closing the first switch when the voltage difference is less than the preset difference can ensure that there will be no excessive inrush current and trigger the overcurrent protection. In this way, the safety of the method can be further improved.

[0229] Furthermore, after the first switch and the second switch are closed, the external power source may supply power to the heating assembly.

[0230] In a possible implementation, when the heating mode to be performed is the third preset heating mode, controlling the conversion unit in the heating device according to the heating mode to be performed so that the battery unit or the external power supply outputs working power to the heating component includes:

[0231] The first switch in the conversion unit is controlled to be turned off.

[0232] The resonant circuit in the conversion unit is controlled to soft start.

[0233] When it is determined that the resonant circuit has been started up, the second switch in the conversion unit is controlled to be closed.

[0234] It is worth noting that controlling the first switch to be disconnected and then soft-starting the resonant circuit can prevent the resonant circuit from outputting power to the external power supply after soft-starting. Moreover, after the resonant circuit is started and the second switch is closed, the battery unit can supply power to the heating component.

[0235] For a possible implementation, see Fig. 9 After controlling the conversion unit in the heating device according to the temperature and the target current so that the battery unit or the external power supply outputs working power to the heating component, the method further includes:

[0236] Step 24: Continuously obtain the real-time temperature and current of the battery unit and / or the real-time output parameters of the external power source.

[0237] Step 25: Determine the heating mode to be updated at the current moment according to the real-time temperature, the real-time current and / or the output parameter.

[0238] Step 26: Control the conversion unit to adjust the working state of the heating component according to the heating mode to be updated.

[0239] Optionally, the real-time temperature refers to the cell temperature of the battery cell at the current moment, the real-time current refers to the charging current or discharging current of the battery cell at the current moment, and the real-time output parameter refers to the voltage applied by the external power supply to the above-mentioned first switch at the current moment.

[0240] Specifically, the step of determining the heating mode to be updated is the same as the above-mentioned method of determining the heating mode to be executed, and reference may be made to the above description, and the embodiment of the present application will not be repeated here.

[0241] Optionally, the working state of the heating component may indicate whether the heating component is powered on, and a device that supplies power to the heating component, etc.

[0242] Furthermore, the heating mode to be updated also corresponds to the four modes of control by the first processing unit 102 provided in the above embodiment, which will not be described in detail in the embodiment of the present application.

[0243] It can be understood that when the conversion unit is controlled to adjust the working state according to the heating mode to be updated, the working state can be adaptively adjusted according to the heating mode to be updated and the heating mode being executed.

[0244] For example, in order to better explain the operation of switching the heating mode during the heating process, a variety of situations are provided below, and the specific description is as follows:

[0245] In the first case, if the heating method currently being executed is the second preset heating method mentioned above, and the heating method to be updated is the first preset heating method mentioned above, then when executing step 26, it can be carried out as follows: first control the second switch to be disconnected to avoid the subsequent resonant circuit from being unable to start under load; then control the first switch to remain in a closed state, and then control the resonant circuit to start soft start, and then close the second switch after the soft start is completed.

[0246] In the second case, if the heating method currently being executed is the second preset heating method mentioned above, and the heating method to be updated is the third preset heating method mentioned above, then when executing step 26, it can be carried out as follows: first control the second switch to be disconnected to prevent the subsequent resonant circuit from being unable to start with load; then control the first switch to be disconnected to prevent the resonant circuit from outputting power to the outside after the soft start is completed; then control the resonant circuit to start soft start, and close the second switch after the soft start is completed.

[0247] In the third case, if the heating mode currently being executed is the third preset heating mode mentioned above, and the heating mode to be updated is the first preset heating mode mentioned above, then when executing step 26, it can be carried out as follows: first control the second switch to be disconnected and close the resonant circuit; then determine whether the voltage difference between the first end and the third end of the first switch meets the preset difference, if so, close the first switch; then control the resonant circuit to start soft start, and close the second switch after the soft start is completed.

[0248] If the voltage difference does not meet the preset difference, the second switch is controlled to close and last for a certain period of time so that the output capacitor in the conversion unit can be discharged quickly; then the resonant circuit is controlled to start soft start, and the second switch is closed after the soft start is completed.

[0249] In the fourth case, if the heating method currently being executed is the third preset heating method mentioned above, and the heating method to be updated is the second preset heating method mentioned above, then when executing step 26, it can be carried out as follows: control the resonant circuit to be closed to avoid the external power supply to charge the battery unit with high power through the first switch and the resonant circuit when the first switch is closed; then disconnect the second switch to avoid the problem that the external power supply supplies power to the heating component for a long time through the above-mentioned pre-charging circuit, causing the above-mentioned resistor R to burn out; then determine whether the voltage difference between the first end and the third end of the first switch meets the preset difference, if so, close the first switch; and then close the second switch.

[0250] If the voltage difference does not meet the preset difference value, the second switch is controlled to be closed for a certain period of time so that the output capacitor in the conversion unit can be discharged quickly; and then the second switch is closed.

[0251] In the fifth case, if the heating mode to be updated is to stop heating, each device in the conversion unit is controlled to act according to corresponding steps to stop outputting the working voltage to the heating component.

[0252] The above is merely an example provided to explain the process of switching the heating mode, and does not mean that the method provided in the embodiment of the present application can only switch the heating mode in this way, and the embodiment of the present application does not limit this.

[0253] In a possible implementation, if the currently executed heating mode is the second preset heating mode, the method may further include:

[0254] The above voltage difference is continuously detected.

[0255] When it is detected that the voltage difference is greater than the first threshold, the second switch in the conversion unit is controlled to be opened, and when the voltage difference is less than the second threshold, the second switch in the conversion unit is controlled to be closed.

[0256] The first threshold and the second threshold can be set according to actual needs. Generally, the first threshold is greater than the second threshold. For example, the first threshold can be 40V and the second threshold can be 25V.

[0257] It is worth noting that, in this way, it is possible to avoid the problem that the first switch is abnormally closed and the external power supply supplies power to the heating component through the pre-charging circuit for a long time, thereby causing the resistor R to burn out due to overpower.

[0258] In a possible implementation, in the embodiment of the present application, after the output of the working voltage to the heating component is stopped, step 21 and other related steps may be re-executed after a certain interval. Step 21 and other related steps may also be continuously executed after the output of the working voltage to the heating component is stopped. The embodiment of the present application does not limit this.

[0259] The following describes the device and computer-readable storage medium used to execute the heating control method provided in the present application. The specific implementation process and technical effects are described above and will not be repeated below.

[0260] Fig.10 is a schematic diagram of a heating control device provided in an embodiment of the present application, see Fig.10 , the device comprises:

[0261] A first acquisition module 301 is used to acquire the temperature of the battery unit in the heating device;

[0262] The second acquisition module 302 is used to determine that the heating component currently needs to output working power when the temperature meets the first temperature range, and obtain the target current of the battery unit; the target current includes a charging current or a discharging current;

[0263] The control module 303 is used to control the conversion unit in the heating device according to the temperature and the target current so that the battery unit or the external power supply outputs working power to the heating component.

[0264] The above-mentioned device is used to execute the method provided by the aforementioned embodiment, and its implementation principle and technical effect are similar, which will not be repeated here.

[0265] The above modules may be one or more integrated circuits configured to implement the above methods, such as one or more application specific integrated circuits (ASICs), or one or more microprocessors, or one or more field programmable gate arrays (FPGAs). For another example, when a module is implemented in the form of a processing element scheduling program code, the processing element may be a general-purpose processor, such as a central processing unit (CPU) or other processor that can call program code. For another example, these modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).

[0266] An embodiment of the present application further provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments can be implemented.

[0267] Optionally, the present application also provides a program product, such as a computer-readable storage medium, including a program, which is used to execute any of the above-mentioned heating control method embodiments when executed by a processor.

[0268] In the several embodiments provided by the present invention, it should be understood that the disclosed devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0269] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0270] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0271] The above-mentioned integrated unit implemented in the form of a software functional unit can be stored in a computer-readable storage medium. The above-mentioned software functional unit is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) or a processor (English: processor) to perform some steps of the methods of various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (English: Read-Only Memory, abbreviated: ROM), random access memory (English: Random Access Memory, abbreviated: RAM), disk or optical disk and other media that can store program codes.

[0272] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0273] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A heating device, characterized in that: The heating device comprises: at least one battery unit, at least one conversion unit, and at least one heating assembly; The first end and the second end of the battery unit are connected to the first end and the second end of the conversion unit respectively, the third end and the fourth end of the conversion unit are connected to the first end and the second end of the external power supply respectively, and the fifth end and the sixth end of the conversion unit are connected to the heating assembly respectively; Wherein, the conversion unit is used to enable the battery unit or the external power supply to output working power to the heating component according to the working parameters of the battery unit and / or the output parameters of the external power supply; The heating component is used to convert the working electrical energy into heat to increase the temperature of the battery unit; The operating parameters include at least one of the following: the temperature, charging current, and discharging current of the battery unit; the output parameters include at least the output voltage of the external power supply.

2. The heating device according to claim 1, characterized in that The conversion unit includes: a resonant circuit, a first processing unit, a first switch, a second switch, and a pre-charging circuit; The first end and the second end of the resonant circuit are respectively connected to the first end and the second end of the battery unit, the third end of the resonant circuit is respectively connected to the first end of the first switch, the first end of the second switch and the first end of the pre-charging circuit, and the fourth end of the resonant circuit is respectively connected to the second end of the first switch and the second end of the second switch; The third end of the first switch is connected to the second end of the pre-charging circuit and the first end of the external power supply respectively, and the fourth end of the first switch is connected to the second end of the external power supply; The third end and the fourth end of the second switch are respectively connected to the heating component; Wherein, the first processing unit is used to control the resonant circuit to be turned off or on, the first switch to be turned on or off, and the second switch to be turned on or off according to the working parameter and the output parameter, so that the battery unit or the external power supply outputs the working power to the heating component; The pre-charging circuit is used to reduce the voltage difference between the first end and the third end of the first switch.

3. The heating device according to claim 2, characterized in that The heating device also includes a second processing unit; The first end of the second processing unit is connected to the third end of the battery unit, and the second end of the second processing unit is connected to the first processing unit; Wherein, the second processing unit is used to obtain the working parameters and / or the output parameters, determine the target heating mode according to the working parameters and / or the output parameters, and send the target heating mode to the first processing unit; the target heating mode is used to indicate the device that supplies power to the heating component; The first processing unit is used to control the resonant circuit to shut down or start up, the first switch to turn on or off, and the second switch to turn on or off according to the target heating method, so that the battery unit or the external power supply outputs the working power to the heating component.

4. The heating device according to claim 2, characterized in that The conversion unit also includes: a temperature detection unit and an electric energy parameter detection unit; The temperature detection unit and the electric energy parameter detection unit are respectively connected to the first processing unit; Wherein, the temperature detection unit is used to detect the temperature and send the temperature to the first processing unit; The electric energy parameter detection unit is used to detect the charging current, the discharging current and / or the output parameter, and send the charging current, the discharging current and / or the output parameter to the first processing unit; The first processing unit is used to determine a target heating mode according to the temperature, the charging current, the discharging current and / or the output parameter; The first processing unit is also used to control the resonant circuit to shut down or start up, the first switch to turn on or off, and the second switch to turn on or off according to the target heating method, so that the battery unit or the external power supply outputs the working power to the heating component.

5. An energy storage system, characterized in that: The energy storage system comprises at least an external power source and the heating device according to any one of claims 1 to 4.

6. A heating control method, characterized in that: Applicable to the heating device according to any one of claims 1 to 4 above; the method comprises: Obtaining the temperature of a battery cell in the heating device; When the temperature satisfies the first temperature range, determining that working power needs to be output to the heating component, and obtaining a target current of the battery unit; the target current includes a charging current or a discharging current; The conversion unit in the heating device is controlled according to the temperature and the target current so that the battery unit or the external power supply outputs working power to the heating component.

7. The heating control method according to claim 6, characterized in that: The step of controlling the conversion unit in the heating device according to the temperature and the target current so that the battery unit or the external power supply outputs working power to the heating component includes: Determining a heating mode to be performed according to the temperature and the target current; According to the heating mode to be executed, the conversion unit in the heating device is controlled so that the battery unit or the external power supply outputs working power to the heating component.

8. The heating control method according to claim 7, characterized in that: The step of determining a heating method to be performed according to the temperature and the target current includes: Determine whether the temperature satisfies a second temperature interval; the maximum value of the second temperature interval is equal to the maximum value of the first temperature interval, and the minimum value of the second temperature interval is greater than the minimum value of the first temperature interval; If so, determining whether the target current satisfies a first current interval within a first preset time period; If so, the first preset heating mode is used as the heating mode to be executed; the device indicated by the first preset heating mode to output working power to the heating component is determined by the charging and discharging state of the battery unit.

9. The heating control method according to claim 8, characterized in that: After determining whether the temperature satisfies the second temperature interval, the method further includes: If not, determining whether the target current satisfies a second current interval within a second preset time period; If yes, determine whether the temperature satisfies a third temperature interval; the maximum value of the third temperature interval is equal to the maximum value of the second temperature interval, and the minimum value of the third temperature interval is greater than the minimum value of the second temperature interval; If the temperature does not satisfy the third temperature range, the second preset heating mode is used as the heating mode to be executed; the second preset heating mode is used to indicate that the external power supply outputs working power to the heating component.

10. The heating control method according to claim 9, characterized in that: After determining whether the temperature satisfies a third temperature interval, the method further includes: If the temperature satisfies the third temperature interval, determining whether the output parameter of the external power supply satisfies a preset voltage interval; If yes, the second preset heating mode is used as the heating mode to be executed; If not, the third preset heating mode is used as the heating mode to be executed; the third preset heating mode is used to indicate that the battery unit outputs working power to the heating component.

11. The heating control method according to claim 10, characterized in that: In the case where the heating mode to be performed is the first preset heating mode, controlling the conversion unit in the heating device according to the heating mode to be performed so that the battery unit or the external power supply outputs working power to the heating component includes: Controlling the second switch in the conversion unit to be disconnected; Controlling a first switch in the conversion unit to close, and controlling a resonant circuit in the conversion unit to soft-start; controlling the second switch to close; If it is determined that the battery unit is in a discharge state, the battery unit outputs the working electrical energy to the heating component through the resonant circuit; If it is determined that the battery unit is in a charging state, the external power source outputs the operating power to the heating component through the first switch.

12. The heating control method according to claim 10, characterized in that: When the heating mode to be performed is the second preset heating mode, controlling the conversion unit in the heating device according to the heating mode to be performed so that the battery unit or the external power supply outputs working power to the heating component includes: Acquire a voltage difference between a first terminal and a third terminal of a first switch in the conversion unit; When the voltage difference is less than a preset difference, controlling the first switch to close; The second switch in the conversion unit is controlled to be closed.

13. The heating control method according to claim 10, characterized in that: In the case where the heating mode to be performed is the third preset heating mode, controlling the conversion unit in the heating device according to the heating mode to be performed so that the battery unit or the external power supply outputs working power to the heating component includes: Controlling the first switch in the conversion unit to be disconnected; Controlling the soft start of the resonant circuit in the conversion unit; When it is determined that the resonant circuit has been started up, the second switch in the conversion unit is controlled to be closed.

14. The heating control method according to any one of claims 6 to 13, characterized in that: After controlling the conversion unit in the heating device according to the heating mode to be performed so that the battery unit or the external power supply outputs working power to the heating component, the method further includes: Continuously acquiring the real-time temperature and real-time current of the battery unit and / or the real-time output parameters of the external power source; Determine the heating mode to be updated at the current moment according to the real-time temperature, the real-time current and / or the output parameter; The conversion unit is controlled to adjust the working state of the heating component according to the heating mode to be updated.

15. A heating control device, characterized in that: The device comprises: A first acquisition module, used to acquire the temperature of the battery unit in the heating device; A second acquisition module is used to determine that the heating component currently needs to output working power when the temperature meets the first temperature range, and to obtain a target current of the battery unit; the target current includes a charging current or a discharging current; A control module is used to control a conversion unit in the heating device according to the temperature and the target current so that the battery unit or the external power supply outputs working power to the heating component.

16. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the method described in any one of claims 6 to 14.

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