Solar battery heating system and heating control method and device thereof

Abstract

The embodiment of the present application provides a solar battery heating system and a heating control method and device thereof, which are used for heating the battery without consuming the battery power. The system comprises: a charging and discharging module, which is used for storing the power generated by a solar panel to the battery and simultaneously supplying power to a power regulating module; a charging and discharging power detection module, which is used for detecting the discharging power of the battery; an input voltage detection module, which is used for detecting the input voltage of the solar panel input to the charging and discharging module; a temperature detection module, which is used for detecting the temperature of the battery; and a control module, which is used for controlling the power regulating module to regulate the discharging power of the battery to zero when the temperature of the battery is less than a first preset temperature threshold and the input voltage is greater than a first preset voltage threshold, and heating the battery by using the power generated by the solar panel.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a solar battery heating system and its heating control method and apparatus. Background Technology

[0002] With the development of solar energy and battery technology, solar cells are being used more and more widely. However, solar cells have poor low-temperature characteristics. When the battery is in a low-temperature environment, not only will the battery's discharge capacity be limited, but charging at low temperatures will also raise safety issues.

[0003] Existing solar battery systems typically control battery temperature through battery heating. When the battery temperature is lower than the battery's charging operating temperature, the heating is turned on; when the temperature rises to the set value, the heating is turned off, and so on, to ensure that the battery operates near the set temperature value.

[0004] However, in the above scheme, since the power used to heat the battery is the solar cell itself, when the solar input power is insufficient, turning on the battery heating will consume the battery power. Under unstable solar input conditions, this method will not only fail to heat the battery to the charging temperature to charge the battery, but will also consume the existing power in the battery. Summary of the Invention

[0005] The purpose of this application is to provide a solar battery heating system and its heating control method and device, which can heat the battery without consuming the battery's power.

[0006] In a first aspect, embodiments of this application provide a solar battery heating system, the system comprising: a solar panel, a charging / discharging module, a charging / discharging power detection module, an input voltage detection module, a battery, a temperature detection module, a power regulation module, and a control module, wherein...

[0007] The charging and discharging module is connected to the solar panel at one end and to the battery and the power regulation module at the other end. It is used to store the electrical energy generated by the solar panel into the battery and to supply power to the power regulation module at the same time.

[0008] The charging and discharging power detection module is connected to the battery and is used to detect the discharge power of the battery and send the discharge power of the battery to the control module.

[0009] The input voltage detection module is connected to the solar panel and is used to detect the input voltage of the solar panel to the charging and discharging module, and send the input voltage to the control module.

[0010] The temperature detection module is installed on the battery and is used to detect the temperature of the battery and send the battery temperature to the control module.

[0011] The control module is configured to, based on the received input voltage, the battery discharge power, and the battery temperature, control the power adjustment module to adjust the battery discharge power to zero when the battery temperature is less than a first preset temperature threshold and the input voltage is greater than a first preset voltage threshold, thereby using the electrical energy generated by the solar panel to heat the battery.

[0012] In some embodiments, the control module is further configured to:

[0013] When the temperature of the battery is greater than a second preset temperature threshold, or when the input voltage is less than a second preset voltage threshold, the power regulation module is controlled to stop heating the battery, wherein the second preset temperature threshold is greater than the first preset temperature threshold, and the second preset voltage threshold is less than the first preset voltage threshold.

[0014] In some embodiments, the control module is specifically used for:

[0015] The temperature of the battery and the preset temperature value are input into a first proportional, integral, and derivative (PID) controller to obtain the first heating power;

[0016] The discharge power of the battery and the preset discharge power value are input into the second PID controller to obtain the second heating power, and when it is determined that the second heating power is greater than zero, the second heating power is set to zero;

[0017] The sum of the first heating power and the second heating power is used as the input power when heating the battery using the solar panel, wherein the preset temperature value is greater than the first preset temperature threshold and less than the second preset temperature threshold.

[0018] In some embodiments, the power regulation module is a direct current (DC)-DC circuit with voltage regulation function or a DC-DC circuit with current regulation function.

[0019] Secondly, embodiments of this application also provide a method for controlling the heating of a storage battery, applied to a solar storage battery heating system as described in any of the first aspects, the method comprising:

[0020] The input voltage of the solar panel to the battery, the discharge power of the battery, and the temperature of the battery are obtained.

[0021] When the temperature of the battery is lower than a first preset temperature threshold and the input voltage is greater than a first preset voltage threshold, the discharge power of the battery is controlled to be zero, and the battery is heated by the electrical energy generated by the solar panel.

[0022] In some embodiments, the method further includes:

[0023] When the temperature of the battery is greater than a second preset temperature threshold, or when the input voltage is less than a second preset voltage threshold, heating of the battery is stopped, wherein the second preset temperature threshold is greater than the first preset temperature threshold, and the second preset voltage threshold is less than the first preset voltage threshold.

[0024] In some embodiments, controlling the discharge power of the battery to zero and using the electrical energy generated by the solar panel to heat the battery includes:

[0025] The temperature of the battery and the preset temperature value are input into the first PID controller to obtain the first heating power;

[0026] The discharge power of the battery and the preset discharge power value are input into the second PID controller to obtain the second heating power, and when it is determined that the second heating power is greater than zero, the second heating power is set to zero;

[0027] The sum of the first heating power and the second heating power is used as the input power when the electrical energy generated by the solar panel is used to heat the battery.

[0028] Thirdly, embodiments of this application also provide a heating control device for a storage battery, comprising:

[0029] The acquisition unit is used to acquire the input voltage of the solar panel to the battery, the discharge power of the battery, and the temperature of the battery;

[0030] The control unit is configured to control the discharge power of the battery to zero and use the electrical energy generated by the solar panel to heat the battery when the temperature of the battery is less than a first preset temperature threshold and the input voltage is greater than a first preset voltage threshold.

[0031] In some embodiments, the control unit is further configured to:

[0032] When the temperature of the battery is greater than a second preset temperature threshold, or when the input voltage is less than a second preset voltage threshold, heating of the battery is stopped, wherein the second preset temperature threshold is greater than the first preset temperature threshold, and the second preset voltage threshold is less than the first preset voltage threshold.

[0033] In some embodiments, the control unit is specifically used for:

[0034] The temperature of the battery and the preset temperature value are input into the first PID controller to obtain the first heating power;

[0035] The discharge power of the battery and the preset discharge power value are input into the second PID controller to obtain the second heating power, and when it is determined that the second heating power is greater than zero, the second heating power is set to zero;

[0036] The sum of the first heating power and the second heating power is used as the input power when the electrical energy generated by the solar panel is used to heat the battery.

[0037] This application provides a solar battery heating system and its heating control method and apparatus. When the battery temperature is lower than a first preset temperature threshold, that is, when the battery temperature is low, if the input voltage of the solar panel to the battery is greater than the first preset voltage threshold, it is determined that under this condition, the electrical energy generated by the solar panel can heat the battery without consuming the battery's power. Therefore, the discharge power of the battery is controlled and adjusted to zero, and the electrical energy generated by the solar panel is used to heat the battery, thereby achieving heating of the battery without consuming the battery's power. Attached Figure Description

[0038] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments of this application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the system architecture of a solar battery heating system according to an embodiment of this application;

[0040] Figure 2 This is a schematic diagram illustrating the control logic of a control module determining the input power for heating a battery by a solar panel, according to an embodiment of this application.

[0041] Figure 3 This is a schematic diagram of the control process of a control module controlling the heating of a storage battery according to an embodiment of this application;

[0042] Figure 4 This is a circuit diagram of a power regulation module including voltage regulation function according to an embodiment of this application;

[0043] Figure 5 This is a circuit diagram of a power regulation module including current regulation function according to an embodiment of this application;

[0044] Figure 6 This is a flowchart illustrating a method for controlling the heating of a storage battery according to an embodiment of this application;

[0045] Figure 7 This is a schematic diagram of the structure of a battery heating control device according to an embodiment of this application. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. The described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0047] Existing solar battery systems typically control battery temperature through battery heating. When the battery temperature is lower than the battery's charging operating temperature, the heating is turned on; when the temperature rises to the set value, the heating is turned off, and so on, to ensure that the battery operates near the set temperature value.

[0048] However, in the above scheme, since the power used to heat the battery is the solar cell itself, when the solar input power is insufficient, turning on the battery heating will consume the battery power. Under unstable solar input conditions, this method will not only fail to heat the battery to the charging temperature to charge the battery, but will also consume the existing power in the battery.

[0049] To address the problem of current solar battery systems consuming battery power to heat the battery, this application provides a solar battery heating system, such as... Figure 1 As shown, it includes: a solar panel 10, a charging and discharging module 11, a charging and discharging power detection module 12, an input voltage detection module 13, a battery 14, a temperature detection module 15, a power regulation module 16, and a control module 17.

[0050] The charging and discharging module 11 is connected to the solar panel 10 at one end and to the storage battery 14 and the power regulation module 16 at the other end. It is used to store the electrical energy generated by the solar panel 10 into the storage battery 14 and to supply power to the power regulation module 16 at the same time.

[0051] It should be noted that the charging and discharging module 11 is connected between the solar panel 10 and the battery 14, storing the electrical energy generated by the solar panel 10 into the battery 14. At the same time, the charging and discharging module 11 is connected to the downstream system (such as a load device) to provide the electrical energy generated by the solar panel 10 and / or the electrical energy stored in the battery 14 to the downstream system. In addition, in the embodiments of this application, the charging and discharging module 11 is also connected to the power regulation module 16 for heating the battery 14 using the electrical energy generated by the solar panel 10.

[0052] In practice, the charging and discharging module 11 can adopt a conventional charging and discharging circuit structure, such as an overcharge protection circuit and an over-discharge protection circuit.

[0053] The charge / discharge power detection module 12 is connected to the battery 14 and is used to detect the discharge power of the battery 14 and send the discharge power of the battery 14 to the control module 17.

[0054] It should be noted that the charge / discharge power detection module 12 can use a conventional charge / discharge power detection circuit. In this embodiment, it detects the discharge power of the battery 14 and sends the discharge power of the battery 14 to the control module 17, so that the control module 17 controls the heating of the battery 14 when the discharge power of the battery 14 is zero. Of course, in other embodiments of this application, the charge / discharge power detection module 12 can also detect the charging power of the battery 14, and this embodiment does not limit this.

[0055] The input voltage detection module 13 is connected to the solar panel 10 and is used to detect the input voltage of the solar panel 10 to the charging and discharging module 11, and send the input voltage to the control module 17.

[0056] In practical applications, the input voltage detection module 13 is used to detect the input voltage of the solar panel 10 to the charging and discharging module 11, or to detect the output voltage of the solar panel 10. It can intuitively reflect whether the solar panel 10 is generating electricity and whether the electricity generated by the solar panel 10 can supply the downstream system.

[0057] In specific implementation, this application embodiment needs to heat the battery 14 using the electrical energy generated by the solar panel 10 without consuming the battery 14's power. Therefore, the electrical energy required to heat the battery 14 is entirely provided by the electrical energy generated by the solar panel 10. Thus, this application embodiment can ensure that the heating of the battery 14 is turned off during periods when the solar panel 10 does not generate electrical energy or generates less electrical energy by detecting the input voltage of the solar panel 10 into the charging and discharging module 11. During periods when the solar panel 10 generates more electrical energy, if the temperature of the battery 14 is low, the battery 14 is heated to ensure the operating temperature of the battery 14.

[0058] Temperature detection module 15 is installed on battery 14 to detect the temperature of battery 14 and send the temperature of battery 14 to control module 17.

[0059] In specific implementation, the temperature detection module 15 can use one or more temperature sensors, etc. The temperature detection module 15 detects the real-time temperature of the battery 14 and sends the real-time temperature of the battery 14 to the control module 17 to realize the temperature control of the battery 14.

[0060] The control module 17 is used to control the power adjustment module 16 to adjust the discharge power of the battery to zero and use the electrical energy generated by the solar panel to heat the battery when the temperature of the battery 14 is less than a first preset temperature threshold and the input voltage is greater than a first preset voltage threshold, based on the received input voltage, the discharge power of the battery 14 and the temperature of the battery 14.

[0061] It should be noted that, as needed, a heater may also be provided in this embodiment of the application, which is installed on the battery and used to heat the battery 14.

[0062] In specific implementation, the control module 17 is also used to: control the power regulation module to stop heating the battery when the temperature of the battery is greater than the second preset temperature threshold or the input voltage is less than the second preset voltage threshold, wherein the second preset temperature threshold is greater than the first preset temperature threshold and the second preset voltage threshold is less than the first preset voltage threshold.

[0063] When the battery temperature exceeds the second preset temperature threshold, it indicates that the battery has reached its normal operating temperature and there is no need to continue heating it. Therefore, the power regulation module can be controlled to stop heating the battery. Similarly, when the input voltage is below the second preset voltage threshold, it indicates that the solar panel is not currently generating electricity or is generating very little electricity. This electricity is insufficient to heat the battery without consuming its power. Therefore, to avoid consuming the battery's power, heating the battery also needs to be stopped.

[0064] The first preset temperature threshold and the second preset temperature threshold can both be set according to empirical values. For example, the first preset temperature threshold is 0 degrees Celsius (°C) and the second preset temperature threshold is 15°C. The first preset voltage threshold and the second preset voltage threshold can also be set according to empirical values. For example, the first preset voltage threshold is 10 volts (V) and the second preset voltage threshold is 8V.

[0065] In specific implementation, control module 17 controls power regulation module 16 to adjust the battery's discharge power to zero. When using the electrical energy generated by the solar panel to heat the battery, such as... Figure 2As shown, the control module 17 can input the battery temperature and a preset temperature value into the first PID controller to obtain the first heating power, and input the battery discharge power and a preset discharge power value into the second PID controller to obtain the second heating power. When the second heating power is determined to be greater than zero, the second heating power is set to zero, that is, the battery discharge power is adjusted to zero. Then, the sum of the first heating power and the second heating power is used as the input power when heating the battery with a solar panel. The preset temperature value is greater than the first preset temperature threshold and less than the second preset temperature threshold. The preset temperature value can be set based on experience, for example, the preset temperature value is 8°C. The preset discharge power value can also be set based on experience, for example, the preset discharge power value is 0 watts (W) to avoid the battery discharging to heat the battery.

[0066] In specific implementation, taking a first preset temperature threshold of T1, a second preset temperature threshold of T3, a first preset voltage threshold of V1, and a second preset voltage threshold of V2 as an example, combined with... Figure 3 The specific control logic of the control module 17 in this embodiment, which controls the power adjustment module to adjust the battery's discharge power to zero based on the received input voltage, the battery's discharge power, and the battery's temperature, and uses the electrical energy generated by the solar panel to heat the battery, will be explained below. Figure 3 As shown, it includes:

[0067] S31, Receive the battery temperature detected by the temperature detection module and the input voltage detected by the input voltage detection module.

[0068] S32. Determine whether the battery temperature is less than T1 and whether the input voltage is greater than V1. If the battery temperature is less than T1 and the input voltage is greater than V1, then execute step S33. If the battery temperature is greater than or equal to T1 and / or the input voltage is less than or equal to V1, continue executing step S31.

[0069] S33. When the battery temperature is less than T1 and the input voltage is greater than V1, the battery is heated. Based on the battery temperature, the current battery discharge power, the preset temperature value T2 and the preset discharge power value P1, the input power for heating the battery is determined by the first PID controller and the second PID controller. The battery is heated by the electrical energy generated by the solar panel, and the battery temperature rises.

[0070] S34. Determine whether the battery temperature is greater than T3 or the input voltage is less than V2. If the battery temperature is greater than T3 or the input voltage is less than V2, proceed to step S35. If the battery temperature is less than or equal to T3 and the input voltage is greater than V2, continue heating the battery.

[0071] S35. When the battery temperature is greater than T3 or the input voltage is less than V2, stop heating the battery and continue to execute step S31.

[0072] In the above process, based on the battery temperature, the current battery discharge power, the preset temperature value, and the preset discharge power value, the input power for heating the battery using the solar panel is determined through the first PID control and the second PID control. Heating the battery can achieve automatic temperature control, stabilizing the battery temperature within the operating temperature range. When the battery temperature reaches the preset temperature value, the input power is automatically reduced to keep the battery at a constant temperature, and the remaining power is used to charge the battery. At the same time, it ensures that even if the battery temperature is lower than the operating temperature range, the input power of the solar panel can still heat the battery to the operating temperature, and ensures that the heating process does not lose battery power.

[0073] In one example, the power regulation module 16 in this embodiment of the application may employ a DC-DC circuit that includes voltage regulation functionality, such as... Figure 4 As shown, the voltage is regulated by the DC-DC converter chip U1 and the pulse width modulation (PWM) control signal, thereby regulating the input power for heating the battery. The DC-DC converter chip U1 can be a DIO6930 model.

[0074] In another example, the power regulation module 16 in this embodiment can also be a DC-DC circuit that includes current regulation function, such as... Figure 5 As shown, the current is regulated by the DC-DC converter chip U2 and the pulse width modulation (PWM) control signal, thereby regulating the input power for heating the battery. The DC-DC converter chip U2 can be a SY8718H model.

[0075] Based on the same concept, embodiments of this application also provide a method for controlling the heating of a storage battery, applicable to any of the solar storage battery heating systems described in the first aspect, such as... Figure 6 As shown, the method includes:

[0076] Step 601: Obtain the input voltage of the solar panel to the battery, the discharge power of the battery, and the temperature of the battery.

[0077] Step 602: When the temperature of the battery is lower than the first preset temperature threshold and the input voltage is greater than the first preset voltage threshold, control the discharge power of the battery to zero and use the electrical energy generated by the solar panel to heat the battery.

[0078] In some embodiments, the method further includes:

[0079] Heating of the battery is stopped when the battery temperature is greater than the second preset temperature threshold or the input voltage is less than the second preset voltage threshold. The second preset temperature threshold is greater than the first preset temperature threshold and the second preset voltage threshold is less than the first preset voltage threshold.

[0080] In some embodiments, controlling the discharge power of the battery to zero and using electrical energy generated by a solar panel to heat the battery includes:

[0081] The battery temperature and the preset temperature value are input into the first PID controller to obtain the first heating power;

[0082] The battery discharge power and the preset discharge power value are input into the second PID controller to obtain the second heating power, and when the second heating power is determined to be greater than zero, the second heating power is set to zero.

[0083] The sum of the first heating power and the second heating power is used as the input power when using the electrical energy generated by the solar panel to heat the battery.

[0084] Based on the same concept, embodiments of this application also provide a heating control device for a storage battery, such as... Figure 7 As shown, it includes:

[0085] The acquisition unit 701 is used to acquire the input voltage of the solar panel to the battery, the discharge power of the battery, and the temperature of the battery;

[0086] The control unit 702 is used to control the discharge power of the battery to zero and use the electrical energy generated by the solar panel to heat the battery when the temperature of the battery is lower than a first preset temperature threshold and the input voltage is greater than a first preset voltage threshold.

[0087] In some embodiments, the control unit 702 is further configured to:

[0088] Heating of the battery is stopped when the battery temperature is greater than the second preset temperature threshold or the input voltage is less than the second preset voltage threshold. The second preset temperature threshold is greater than the first preset temperature threshold and the second preset voltage threshold is less than the first preset voltage threshold.

[0089] In some embodiments, the control unit 702 is specifically used for:

[0090] The battery temperature and the preset temperature value are input into the first PID controller to obtain the first heating power;

[0091] The battery discharge power and the preset discharge power value are input into the second PID controller to obtain the second heating power, and when the second heating power is determined to be greater than zero, the second heating power is set to zero.

[0092] The sum of the first heating power and the second heating power is used as the input power when using the electrical energy generated by the solar panel to heat the battery.

[0093] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0094] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to this application. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0095] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0096] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0097] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A solar-powered battery heating system, characterized in that, The system includes: a solar panel, a charging / discharging module, a charging / discharging power detection module, an input voltage detection module, a battery, a temperature detection module, a power regulation module, and a control module. The charging and discharging module is connected to the solar panel at one end and to the battery and the power regulation module at the other end. It is used to store the electrical energy generated by the solar panel into the battery and to supply power to the power regulation module at the same time. The charging and discharging power detection module is connected to the battery and is used to detect the discharge power of the battery and send the discharge power of the battery to the control module. The input voltage detection module is connected to the solar panel and is used to detect the input voltage of the solar panel to the charging and discharging module, and send the input voltage to the control module. The temperature detection module is installed on the battery and is used to detect the temperature of the battery and send the battery temperature to the control module. The control module is configured to, based on the received input voltage, the battery discharge power, and the battery temperature, control the power adjustment module to adjust the battery discharge power to zero when the battery temperature is less than a first preset temperature threshold and the input voltage is greater than a first preset voltage threshold, thereby using the electrical energy generated by the solar panel to heat the battery.

2. The system according to claim 1, characterized in that, The control module is also used for: When the temperature of the battery is greater than a second preset temperature threshold, or when the input voltage is less than a second preset voltage threshold, the power regulation module is controlled to stop heating the battery, wherein the second preset temperature threshold is greater than the first preset temperature threshold, and the second preset voltage threshold is less than the first preset voltage threshold.

3. The system according to claim 2, characterized in that, The control module is specifically used for: The temperature of the battery and a preset temperature value are input into a first proportional, integral and derivative PID controller to obtain the first heating power; The discharge power of the battery and the preset discharge power value are input into the second PID controller to obtain the second heating power, and when it is determined that the second heating power is greater than zero, the second heating power is set to zero; The sum of the first heating power and the second heating power is used as the input power when heating the battery using the solar panel, wherein the preset temperature value is greater than the first preset temperature threshold and less than the second preset temperature threshold.

4. The system according to claim 1, characterized in that, The power regulation module is a DC-DC circuit with voltage regulation function or a DC-DC circuit with current regulation function.

5. A method for controlling the heating of a storage battery, applied to a solar storage battery heating system as described in any one of claims 1-4, characterized in that, The method includes: The input voltage of the solar panel to the battery, the discharge power of the battery, and the temperature of the battery are obtained. When the temperature of the battery is lower than a first preset temperature threshold and the input voltage is greater than a first preset voltage threshold, the discharge power of the battery is controlled to be zero, and the battery is heated by the electrical energy generated by the solar panel.

6. The method according to claim 5, characterized in that, The method further includes: When the temperature of the battery is greater than a second preset temperature threshold, or when the input voltage is less than a second preset voltage threshold, heating of the battery is stopped, wherein the second preset temperature threshold is greater than the first preset temperature threshold, and the second preset voltage threshold is less than the first preset voltage threshold.

7. The method according to claim 5, characterized in that, The step of controlling the discharge power of the battery to zero and using the electrical energy generated by the solar panel to heat the battery includes: The temperature of the battery and the preset temperature value are input into the first PID controller to obtain the first heating power; The discharge power of the battery and the preset discharge power value are input into the second PID controller to obtain the second heating power, and when it is determined that the second heating power is greater than zero, the second heating power is set to zero; The sum of the first heating power and the second heating power is used as the input power when the electrical energy generated by the solar panel is used to heat the battery.

8. A heating control device for a storage battery, characterized in that, include: The acquisition unit is used to acquire the input voltage of the solar panel to the battery, the discharge power of the battery, and the temperature of the battery; The control unit is configured to control the discharge power of the battery to zero and use the electrical energy generated by the solar panel to heat the battery when the temperature of the battery is less than a first preset temperature threshold and the input voltage is greater than a first preset voltage threshold.

9. The apparatus according to claim 8, characterized in that, The control unit is also used for: When the temperature of the battery is greater than a second preset temperature threshold, or when the input voltage is less than a second preset voltage threshold, heating of the battery is stopped, wherein the second preset temperature threshold is greater than the first preset temperature threshold, and the second preset voltage threshold is less than the first preset voltage threshold.

10. The apparatus according to claim 8, characterized in that, The control unit is specifically used for: The temperature of the battery and the preset temperature value are input into the first PID controller to obtain the first heating power; The discharge power of the battery and the preset discharge power value are input into the second PID controller to obtain the second heating power, and when it is determined that the second heating power is greater than zero, the second heating power is set to zero; The sum of the first heating power and the second heating power is used as the input power when the electrical energy generated by the solar panel is used to heat the battery.

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