Battery heating control method, device, control equipment and readable storage medium

Abstract

The present application provides a battery heating control method, device, control equipment and readable storage medium, which relate to the field of battery technology. The battery unit, the first switch, the second switch and the charging interface form a main circuit; the heating unit, the heating switch and the charging interface form a circuit. The method includes: when it is determined that the battery unit needs to be charged and heated, the first switch and the second switch are controlled to be disconnected and the heating switch is closed, so that the charging device provides power to the heating unit through the charging interface and the heating switch, and the entire vehicle has completed high voltage; when it is detected that the temperature is greater than the first preset temperature, the first switch and the second switch are controlled to be closed and the heating switch is disconnected, so that the charging device provides power to the battery unit through the charging interface, the first switch and the second switch. In this way, the battery can be heated without consuming the battery's power, and the battery will not be charged during the heating process to ensure safety.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery heating control method, apparatus, control device, and readable storage medium. Background Art

[0002] Electric vehicles are powered by power battery packs. In low-temperature environments, the viscosity of the electrolyte within the battery pack increases, causing a decrease in the battery's conductivity. Simultaneously, lithium is deposited from the battery's negative electrode, and the deposited metallic lithium reacts with the electrolyte. Directly charging the battery in low-temperature environments can cause safety issues. Therefore, heating the battery pack is essential to mitigate the safety risks associated with low-temperature charging.

[0003] The current low-temperature heating control strategy is as follows: After the charger is plugged in and the charging process begins, the Battery Management System (BMS) and the charger perform a handshake. After the handshake is successful, the BMS adjusts the charger's output current due to the low battery temperature, allowing the charger's output power to be consumed by the heating system. However, this strategy cannot guarantee that the charger will not have sufficient power to charge the battery pack, which may lead to safety accidents. If the adjusted power is too low, the battery pack will discharge excessively, resulting in a reduction in battery charge. If the battery pack is at a low charge, it may even be completely depleted. Summary of the Invention

[0004] Embodiments of the present application provide a battery heating control method, apparatus, control device, and readable storage medium, which can heat a battery without consuming the battery's power, and at the same time, the battery will not be charged during the heating process to ensure safety.

[0005] The embodiments of the present application can be implemented as follows:

[0006] In a first aspect, an embodiment of the present application provides a battery heating control method, which is applied to a charging heating system. The charging heating system includes a heating unit, a first switch, a second switch, a heating switch, and a charging interface. One end of the battery unit is electrically connected to the first end of the charging interface via the first switch, and the other end is electrically connected to the second end of the charging interface via the second switch. One end of the heating unit is electrically connected between the first switch and the first end, and the other end is electrically connected between the second switch and the second end via the heating switch. The method includes:

[0007] When it is determined that the battery unit needs to be charged and heated, the first switch and the second switch are controlled to be opened and the heating switch is controlled to be closed, so that the charging device provides power to the heating unit through the charging interface and the heating switch, wherein the vehicle has already been connected to high voltage;

[0008] When it is detected that the temperature is greater than a first preset temperature, the first switch and the second switch are controlled to be closed and the heating switch is controlled to be opened, so that the charging device provides power to the battery unit through the charging interface, the first switch and the second switch.

[0009] In a second aspect, an embodiment of the present application provides a battery heating control device, which is applied to a charging heating system. The charging heating system includes a heating unit, a first switch, a second switch, a heating switch, and a charging interface. One end of the battery unit is electrically connected to the first end of the charging interface through the first switch, and the other end is electrically connected to the second end of the charging interface through the second switch. One end of the heating unit is electrically connected between the first switch and the first end, and the other end is electrically connected between the second switch and the second end through the heating switch. The device includes:

[0010] a heating module, configured to, when determining that the battery unit needs to be charged and heated, control the first switch and the second switch to be disconnected and the heating switch to be closed, so that the charging device provides power to the heating unit through the charging interface and the heating switch, wherein the vehicle has currently completed high voltage application;

[0011] The charging module is used to control the first switch and the second switch to be closed and the heating switch to be disconnected when detecting that the temperature is greater than a first preset temperature, so that the charging device provides power to the battery unit through the charging interface, the first switch and the second switch.

[0012] In a third aspect, an embodiment of the present application provides an electronic device, including a processor and a memory, wherein the memory stores machine-executable instructions that can be executed by the processor, and the processor can execute the machine-executable instructions to implement the battery heating control method described in any one of the aforementioned embodiments.

[0013] In a fourth aspect, an embodiment of the present application provides a readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the battery heating control method as described in any one of the aforementioned embodiments.

[0014] The battery heating control method, apparatus, control device, and readable storage medium provided in the embodiments of the present application are characterized by a main circuit comprising a battery cell, a first switch, a second switch, and a charging interface. One end of the heating unit is electrically connected between the first switch and the first end of the charging interface, and the other end is electrically connected between the second switch and the second end of the charging interface via the heating switch. When the vehicle has been connected to high voltage and it is determined that the battery cell requires charging and heating, the charging device can provide electric power to the heating unit via the charging interface and the heating switch by controlling the first and second switches to be open and the heating switch to be closed. When the temperature is detected to be greater than a first preset temperature, the first and second switches are controlled to be closed and the heating switch is controlled to be open, allowing the charging device to provide electric power to the battery cell via the charging interface, the first switch, and the second switch. In this way, the battery can be charged and heated, while avoiding the consumption of battery pack power during heating and the possibility of overcharging the battery due to excessive output power of the charging device during heating, which could lead to safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. 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 relevant drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic diagram of the current charging heating system;

[0017] Figure 2 A schematic diagram of a charging and heating system provided in an embodiment of the present application;

[0018] Figure 3 A block diagram of a control word device provided in an embodiment of the present application;

[0019] Figure 4 This is a flow chart of a battery heating control method according to an embodiment of the present application;

[0020] Figure 5 This is a second flow chart of the battery heating control method provided in an embodiment of the present application;

[0021] Figure 6 This is an example schematic diagram of the charging and heating system provided in this application;

[0022] Figure 7 for Figure 5 Schematic diagram of the flow of sub-steps included in step S120;

[0023] Figure 8 The third flowchart of the battery heating control method provided in the embodiment of the present application;

[0024] Figure 9 This is a fourth flow chart of the battery heating control method provided in an embodiment of the present application;

[0025] Figure 10 This is a block diagram of a battery heating control device provided in an embodiment of the present application;

[0026] Figure 11 This is the second schematic diagram of the battery heating control device provided in an embodiment of the present application.

[0027] Icons: 10-control device; 11-memory; 12-processor; 13-communication unit; 100-charging and heating system; 112-heating unit; 114-heating switch; 121-first switch; 122-second switch; 130-charging interface; 140-pre-charging branch; 200-battery unit; 400-battery heating control device; 410-pre-charging module; 420-heating module; 430-charging module. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] 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 protection, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of the present application.

[0030] It should be noted that relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0031] Please refer to Figure 1 , Figure 1 The following is a schematic diagram of the current charging and heating system. Currently, the two ends of the battery pack are connected to the output interface via two main control switches, and the heating system is also connected to the output interface via these two main control switches. In this circuit, the low-temperature heating control strategy used is as follows: After the charger is plugged in and the charging process begins, the Battery Management System (BMS) successfully exchanges power with the charger. Due to the low battery temperature, the BMS adjusts the requested value for the charger's output current, allowing the charger's output power to be consumed by the heating system. However, this strategy cannot guarantee that there will be no excess power from the charger to charge the battery pack. If the adjusted power is too low, the battery pack will discharge excessively, resulting in a reduction in the battery pack's charge level. If the battery level is low, the battery pack may even be completely depleted.

[0032] In order to solve the above problems, the embodiments of the present application provide a battery heating control method, device, control equipment and readable storage medium, and place the electrical wiring of the heating part close to the output end of the battery high-voltage interface. When the heating unit needs to be started due to low temperature, the battery unit first goes through the normal high-voltage process to ensure that the charging equipment is connected to the battery unit high-voltage system normally and continues to pre-charge the vehicle high-voltage system to ensure the normal operation of the vehicle high-voltage system; then, the heating switch and the switch of the circuit where the battery unit is located are controlled, so as to heat the battery without consuming the battery power. At the same time, the battery will not be charged during the heating process to ensure safety.

[0033] The following describes some embodiments of the present application in detail with reference to the accompanying drawings. In the absence of conflict, the following embodiments and features therein may be combined with each other.

[0034] The present invention provides a battery system comprising: Figure 2 The charging and heating system 100, the battery unit 200 and Figure 3 The control device 10 is shown. The control device 10 is used to control the charging and heating system 100 to heat and charge the battery unit 200. The battery unit 200 may include a battery pack including multiple batteries.

[0035] like Figure 1 As shown, the charging heating system 100 may include: a heating unit 112, a heating switch 114, a first switch 121, a second switch 122, and a charging interface 130. One end of the battery cell 200 can be electrically connected to the first end of the charging interface 130 via the first switch 121, and the other end of the battery cell 200 can be electrically connected to the second end of the charging interface 130 via the second switch 122. Thus, the battery cell 200, the first switch 121, the second switch 122, and the charging interface 130 form a main circuit. One end of the heating unit 112 is electrically connected between the first switch 121 and the first end of the charging interface 130, and the other end of the heating unit 112 is electrically connected between the second switch 122 and the second end of the charging interface 130 via the heating switch 114. Thus, the heating unit 112, the heating switch 114, and the charging interface 130 form a heating circuit.

[0036] The first switch 121, the second switch 122, and the heating switch 114 may be relays or other types of switches, and may be configured based on actual needs. The heating unit 112 may include a PTC (Positive Temperature Coefficient) device or other devices capable of heating, and may be configured based on actual needs.

[0037] The control device 10 can be communicatively connected or electrically connected to the first switch 121, the second switch 122, and the heating switch 114 to control the switching states of the first switch 121, the second switch 122, and the heating switch 114, thereby controlling the opening and closing of the main circuit and the opening and closing of the charging circuit. In this way, the battery can be heated without consuming the battery power, and the battery will not be charged during the heating process to ensure safety.

[0038] In this embodiment, the control device 10 may be, but is not limited to, a vehicle telematics box (TBOX). The control device 10 may include a memory 11, a processor 12, and a communication unit 13. The memory 11, processor 12, and communication unit 13 are electrically connected to each other, directly or indirectly, to enable data transmission or interaction. For example, these components may be electrically connected via one or more communication buses or signal lines.

[0039] The memory 11 is used to store programs or data. The memory 11 can be, but is not limited to, random access memory (RAM), read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), etc.

[0040] The processor 12 is used to read / write data or programs stored in the memory 11 and execute corresponding functions. For example, the memory 11 stores a battery heating control device 400, which includes at least one software function module that can be stored in the memory 11 in the form of software or firmware. The processor 12 executes software programs and modules stored in the memory 11, such as the battery heating control device 400 in the embodiment of the present application, to execute various functional applications and data processing, thereby implementing the battery heating control method in the embodiment of the present application.

[0041] The communication unit 13 is used to establish a communication connection between the control device 10 and other communication terminals through a network, and to send and receive data through the network.

[0042] It should be understood that Figure 3 The structure shown is only a schematic diagram of the structure of the control device 10, and the control device 10 may also include Figure 3 More or fewer components than shown, or with Figure 3 Different configurations shown. Figure 3 Each component shown in the figure can be implemented by hardware, software or a combination thereof.

[0043] Please refer to Figure 4 , Figure 4This is a flow chart of a battery heating control method provided in an embodiment of the present application. The method can be used in the control device 10 described above, which can control the charging and heating system 100 based on the method. The specific flow of the battery heating control method is described in detail below. In this embodiment, the method may include steps S120 to S130.

[0044] In step S120 , when it is determined that the battery cell 200 needs to be charged and heated, the first switch 121 and the second switch 122 are controlled to be disconnected and the heating switch 114 is controlled to be closed, so that the charging device provides power to the heating unit 112 through the charging interface 130 and the heating switch 114 .

[0045] When the entire vehicle has completed high voltage, the first switch 121 and the second switch 122 are both closed, that is, the charging circuit (i.e., the main circuit) is in a connected state. When the entire vehicle has been completely connected to high voltage and it is determined that the battery unit 200 needs to be charged and heated, the first switch 121 and the second switch 122 can be controlled to be disconnected to disconnect the charging circuit, so as to prevent the electric energy provided by the charging device from entering the battery unit 200 through the charging circuit. In addition, the heating switch 114 can be controlled to be closed to connect the charging circuit. In this way, when charging and heating are required, the charging circuit is disconnected and the heating circuit is connected. At this time, the electric energy provided by the charging device can be used as the electric energy required for heating the heating circuit, and at the same time, the electric energy will not be provided to the battery unit 200, thereby completing the heating without consuming the electric energy of the battery unit 200, and preventing the electric energy from being provided to the battery unit 200 at a low temperature, causing a safety accident.

[0046] Whether the battery unit 200 needs to be charged can be determined based on user input, combined with the charge level when the vehicle is plugged into a charging device, or by other means. Similarly, whether the battery unit 200 needs to be heated can be determined based on user input, based on detected temperature, or by other means.

[0047] In step S130, when it is detected that the temperature is greater than the first preset temperature, the first switch 121 and the second switch 122 are controlled to be closed and the heating switch 114 is disconnected, so that the charging device provides power to the battery unit 200 through the charging interface 130, the first switch 121 and the second switch 122.

[0048] While the charging circuit is disconnected and the heating circuit is connected, the temperature of the environment surrounding the battery cell 200 can be detected. This temperature can be compared with the first preset temperature. The first preset temperature can be a pre-set temperature required for heating during charging, and the specific value can be set based on actual needs. If the temperature is not greater than the first preset temperature, the current state (i.e., the charging circuit is disconnected and the heating circuit is connected) can be maintained to continue heating the battery cell 200.

[0049] If the temperature is greater than the first preset temperature, the first switch 121 and the second switch 122 can be controlled to close, and the heating switch 114 can be controlled to open, so that the charging circuit is connected and the heating circuit is disconnected, thereby using the power provided by the charging device to charge the battery unit 200.

[0050] In this way, by controlling the on / off status of the charging circuit and the heating circuit, the battery can be heated without consuming the battery power. At the same time, the battery will not be charged during the heating process to ensure safety.

[0051] Please refer to Figure 5 , Figure 5 This is a second flow chart of the battery heating control method provided in an embodiment of the present application. In this embodiment, before step S120, the method may further include step S110.

[0052] Step S110 : When it is determined that the battery unit 200 needs to be charged and a charging gun of the charging device is detected to be inserted, high voltage is applied to the entire vehicle.

[0053] In this embodiment, the control device 10 can detect the temperature of the battery cell 200 and, if the temperature is lower than a second preset temperature, determine that the battery cell 200 needs to be heated. If heating and charging are required, and if the charging device's charging gun is detected to be plugged into the vehicle where the charging heating system is located, the control device 10 can first control the battery cell 200 to follow the normal high-voltage charging process to ensure that the charging device is properly connected to the battery pack's high-voltage system and that the pre-charging process for the entire vehicle's high-voltage system continues, ensuring normal operation of the vehicle's high-voltage system. The second preset temperature is lower than the first preset temperature.

[0054] In this embodiment, if Figure 6As shown, the charging and heating system 100 may further include a pre-charging branch 140, one end of which is electrically connected between the battery cell 200 and the second switch 122, and the other end of which is electrically connected between the second switch 122 and the charging port 130. The pre-charging branch 140 may include a pre-charging switch and a pre-charging resistor. By controlling the pre-charging switch, the first switch 121, and the second switch 122, a high voltage is applied, i.e., a capacitive load is charged.

[0055] If the high voltage application is successful, step S120 may be performed. If the high voltage application fails, the high voltage application process may be repeated.

[0056] When the high voltage is applied successfully, the first switch 121 and the second switch 122 are in a closed state, and the heating switch 114 is in an open state. At this time, the first switch 121 and the second switch can be controlled to be open and the heating switch 114 can be closed so that the heating unit 112 can obtain electrical energy for heating, while ensuring that the battery unit 200 does not obtain electrical energy provided by the charging device.

[0057] Please refer to Figure 7 , Figure 7 for Figure 5 Schematic diagram of the flow of sub-steps included in step S120. In this embodiment, step S120 may include sub-steps S121 to S123.

[0058] Sub-step S121, when it is determined that the battery is connected to the charging device and charging and heating are required, the heating switch 114 is controlled to be closed, and the current output by the charging device is adjusted so that the current value of the current output by the charging device is less than a preset current value.

[0059] Sub-step S122 , when the current value of the current output by the charging device is less than the preset current value, controlling the closed first switch 121 and the second switch 122 to be opened.

[0060] Sub-step S123 : adjusting the parameters of the electric energy output by the charging device to provide electric energy to the heating unit 112 through the heating switch 114 .

[0061] After the vehicle is connected to the charging device and the battery cells 200 are heated and charged, the heating switch 114 can be closed to connect the heating circuit. The output voltage and current of the charging device can then be adjusted to ensure that the current output by the charging device is less than a preset current value. The specific value of the preset current value is determined based on actual needs. When the current value is less than the preset current value, the current value approaches zero.

[0062] When the current output by the charging device is adjusted to less than the preset current value, the first switch 121 and the second switch 122 that are currently closed can be controlled to be opened, that is, the charging circuit is disconnected. In this way, the first switch 121 and the second switch 122 will not be disconnected while the current is flowing, thereby ensuring safety.

[0063] After disconnecting the first and second switches 121 and 122, the voltage and current output by the charging device can be adjusted again. Once the adjustment is complete, the power provided by the charging device can be used to power the heating unit 112, allowing the heating unit 112 to heat the battery cells 200. Alternatively, the voltage and current output by the charging device can be adjusted so that the heating unit operates at maximum power for rapid temperature increase. By disconnecting the charging circuit, efficiency within the heating unit can be improved, preventing the requested voltage of the heating unit 112 from being lower than the designed parameter value after activation due to the battery charge level, thereby reducing heating power and affecting heating duration.

[0064] During the heating process using the heating unit 112, the ambient temperature of the battery cell 200 can be used. When the temperature is greater than the first preset temperature, the voltage and current output by the charging device can be adjusted to meet the charging requirements; then, the first switch 121 and the second switch 122 that are disconnected at this time can be closed first, and then the heating switch 114 can be disconnected, so that the battery cell 200 can be charged using the electric energy provided by the charging device.

[0065] like Figure 5 As shown, during the charging process, if it is determined again that the battery cell 200 needs to be heated, the process returns to step S120, where the heating unit 112 is activated and, when the temperature is greater than the first preset temperature, the battery cell 200 continues to be charged. In this way, after executing step S110, steps S120 to S130 are repeated until charging is completed.

[0066] The following combination Figure 6 The above charging heating method is briefly described.

[0067] exist Figure 6 In the charging and heating system 100 shown, an HV- relay is used as the first switch 121, an HV+ relay is used as the second switch 122, a PreChg relay is used as the pre-charging switch, a PTC relay is used as the heating switch 114, and a PTC unit is used as the heating unit 112. The charging device may be a charger.

[0068] When the charging cable is plugged into the vehicle, the BMS is activated to exit sleep mode and enter normal operation. The BMS controls the HV- and PreChg relays to close to pre-charge the circuit. After the pre-charge period, the HV+ relay closes and the Prechg relay opens, completing the high voltage application process for the entire vehicle.

[0069] After the high voltage is applied, if the battery temperature falls below a second preset temperature, it is determined that battery heating is necessary. In this case, the PTC relay is closed, adjusting the charger's output voltage and current to achieve a circuit detection value of 0. When the current detection value is 0, the HV+ and HV- relays are controlled to open. This allows the battery cells 200 to be heated using the power provided by the charger without charging them.

[0070] After disconnecting the HV+ and HV- relays, the charger's output voltage and current can be adjusted to maximize the PTC unit's power. During the heating process, if the battery temperature rises above a first preset temperature, heating will cease. In this case, the charger's output voltage and current can be adjusted. When the charger voltage equals the current battery voltage, the BMS closes the HV+ and HV- relays, disconnects the PTC relay, and enters the charging state, thereby charging the battery cell 200.

[0071] If the battery temperature drops below the second preset temperature during charging, the following steps are executed again: the PTC relay is closed, the charger output voltage and current are adjusted to make the circuit detection value 0, and the HV+ and HV- relays are disconnected until charging is completed.

[0072] In this embodiment, before starting the heating unit 112 , the BMS first performs a normal charging high voltage process, which can ensure that the charger is not damaged by the capacitive load and can also effectively verify that the high voltage circuit connection is normal.

[0073] Optionally, the control device 10 may send a control instruction to the BMS, and then the BMS controls the states of the first switch 121, the second switch 122, the heating switch 114 and the pre-charging switch based on the control instruction, thereby realizing charging heating control.

[0074] Please refer to Figure 8 , Figure 8 This is a third flow chart of the battery heating control method provided in an embodiment of the present application. In this embodiment, when charging is completed based on the above steps S110 to S130, the method may further include steps S150 and S160.

[0075] Step S150: When charging is completed, it is detected whether heat preservation is required.

[0076] In this embodiment, after charging is completed, whether the battery cell 200 needs to be kept warm can be continuously detected, or periodically detected, or detected again when a user instructs the battery cell 200 to keep warm. The control device 10 can determine whether the battery cell 200 needs to be kept warm based on whether the detected temperature of the battery cell 200 is lower than a second preset temperature.

[0077] As a possible implementation method, the current location of the electric vehicle can be obtained through the GPRS system, Beidou positioning system, etc. The current detection time can also be obtained through communication with a cloud server, etc. Then, based on the current location and the current detection time, the future ambient temperature change trend of the vehicle's current location can be obtained from the cloud server, etc. Whether insulation is required can be determined based on the ambient temperature change trend and the second preset temperature. The specific judgment method can be determined in combination with actual needs. For example, if the ambient temperature change trend indicates that the time period below the second preset temperature is longer than the preset time period, it can be determined that insulation is required.

[0078] Optionally, when determining that heat preservation is required, the control device 10 may send a heat preservation instruction to the BMS, and the BMS turns on the heating unit 112 to keep the temperature in accordance with the heat preservation instruction.

[0079] In step S160, when it is determined that insulation is required, the vehicle is again charged with high voltage, and after the high voltage is successfully applied, the first switch 121 and the second switch 122 are controlled to be disconnected and the heating switch 114 is closed, so that the charging device can be used to provide the heating unit with the required electrical energy for heating.

[0080] If insulation is determined to be necessary, since charging has completed and the vehicle is not in a high-voltage state, steps S110 to S120 can be re-executed at the determined insulation start time to apply high voltage to the vehicle. After successful application of high voltage, the first and second switches are controlled to be open and the heating switch is closed, thereby utilizing grid energy for insulation. This prevents loss of battery cell 200 power, ensures the user's mileage requirements, and maintains a high-performance battery phase.

[0081] Among them, the insulation start time can be the current time or the future time, etc., and can be determined in combination with the judgment method of determining whether to keep warm. For example, if the judgment method is based on the current temperature and the second preset temperature, then when the current temperature is lower than the second preset temperature, the current time can be used as the insulation start time.

[0082] Please refer to Figure 9 , Figure 9This is a fourth flow chart of the battery heating control method provided in an embodiment of the present application. In this embodiment, after step S160, the method may further include steps S170 and S180.

[0083] Step S170: obtaining a heating temperature during heating due to heat preservation requirements.

[0084] Step S180 , when the heating temperature is greater than a third preset temperature, controlling the heating switch 114 to be turned off to stop heating.

[0085] In this embodiment, when the heating unit 112 is used to heat the battery cell 200 due to the need for heat preservation, the temperature of the battery cell 200 at that time can be obtained as the heating temperature. This heating temperature can then be compared with a third preset temperature. The third preset temperature is greater than the first preset temperature. When the heating temperature is not greater than the third preset temperature, the heating unit 112 can continue to use the electric energy provided by the charging device for heating. When the heating temperature is greater than the third preset temperature, the heating switch 114 can be controlled to disconnect to stop heating. In this way, the time it takes for the temperature of the battery cell 200 to drop to the second preset temperature can be longer, avoiding frequent activation of the heating unit 112 for heating.

[0086] In order to execute the corresponding steps in the above embodiments and various possible methods, a method for implementing a battery heating control device 400 is given below. Optionally, the battery heating control device 400 can adopt the above Figure 3 The device structure of the control device 10 shown in FIG. Figure 10 , Figure 10 This is a block diagram of a battery heating control device 400 provided in an embodiment of the present application. It should be noted that the basic principles and technical effects of the battery heating control device 400 provided in this embodiment are the same as those of the aforementioned embodiments. For the sake of brevity, any details not mentioned in this embodiment can be referred to the corresponding content in the aforementioned embodiments. In this embodiment, the battery heating control device 400 can be applied to the aforementioned charging and heating system 100. The battery heating control device 400 may include: a heating module 420 and a charging module 430.

[0087] The heating module 420 controls the first switch 121 and the second switch 122 to be disconnected and the heating switch 114 to be closed when determining that the battery unit 200 needs to be charged and heated, so that the charging device provides power to the heating unit 112 through the charging interface 130 and the heating switch 114. The vehicle has already been connected to high voltage.

[0088] The charging module 430 is used to control the first switch 121 and the second switch 122 to close and the heating switch 114 to open when it detects that the temperature is greater than the first preset temperature, so that the charging device provides power to the battery unit 200 through the charging interface 130, the first switch 121 and the second switch 122.

[0089] Please refer to Figure 11 , Figure 11 The second block diagram of the battery heating control device 400 provided in an embodiment of the present application. The battery heating control device 400 may also include a pre-charging module 410. When the heating module 420 determines that the battery cell needs to be charged and heated, it controls the first switch and the second switch to be disconnected and the heating switch to be closed, so that the charging device provides electrical energy to the heating unit through the charging interface and the heating switch. The pre-charging module 410 is used to apply high voltage to the entire vehicle when it is determined that the battery cell needs to be charged and detects that the charging gun of the charging device is inserted. Wherein, when the high voltage is successfully applied, the first switch and the second switch are in a closed state. When the high voltage is successfully applied, the heating module 420 controls the first switch 121 and the second switch 122 to be disconnected and the heating switch 114 to be closed.

[0090] The heating module 420 is also used to control the first switch and the second switch to be disconnected and the heating switch to be closed again when it is determined that heating is needed again during the charging process, so that the charging device provides power to the heating unit through the charging interface and the heating switch until charging is completed.

[0091] In this embodiment, the heating module 420 is also used to detect whether insulation is required after charging is completed. If insulation is determined to be necessary, the pre-charging module 410 re-applies high voltage to the entire vehicle. After successful high voltage application, the heating module 420 controls the first switch 121 and the second switch 122 to open and the heating switch 114 to close, thereby utilizing the charging equipment to provide the heating unit 112 with the required electrical energy.

[0092] In this embodiment, the heating module 420 is also used to: obtain a heating temperature during the heating process due to insulation requirements; when the heating temperature is greater than a third preset temperature, control the heating switch 114 to disconnect to stop heating, wherein the third preset temperature is greater than the first preset temperature.

[0093] Optionally, the above modules can be stored in the form of software or firmware. Figure 3The memory 11 shown in FIG. 1 is stored in the operating system (OS) of the control device 10 and can be used by Figure 3 Meanwhile, the data, program codes, etc. required to execute the above modules may be stored in the memory 11.

[0094] An embodiment of the present application further provides a readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the battery heating control method is implemented.

[0095] In summary, the embodiments of the present application provide a battery heating control method, apparatus, control device, and readable storage medium. The battery cell, a first switch, a second switch, and a charging interface constitute a main circuit. One end of the heating unit is electrically connected between the first switch and the first end of the charging interface, and the other end is electrically connected between the second switch and the second end of the charging interface via the heating switch. When the vehicle has completed high voltage application and it is determined that the battery cell needs to be charged and heated, by controlling the first and second switches to be disconnected and the heating switch to be closed, the charging device can provide electric power to the heating unit through the charging interface and the heating switch. When the temperature is detected to be greater than a first preset temperature, the first and second switches are controlled to be closed and the heating switch is controlled to be disconnected, so that the charging device can provide electric energy to the battery cell through the charging interface, the first switch, and the second switch. In this way, the battery can be charged and heated, and the consumption of battery pack power during battery heating can be avoided. It can also avoid charging the battery due to excessive output power of the charging device during heating, thereby preventing safety accidents.

[0096] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can also be implemented in other ways. The device embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions and operations of the devices, methods and computer program products according to the multiple embodiments of the present application. In this regard, each box in the flowchart or block diagram can represent a module, a program segment or a part of the code, and the module, program segment or a part of the code contains one or more executable instructions for implementing the specified logical functions. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in an order different from that marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flowchart, and the combination of boxes in the block diagram and / or flowchart, can be implemented using a dedicated hardware-based system that performs the specified function or action, or can be implemented using a combination of dedicated hardware and computer instructions.

[0097] In addition, the functional modules in each embodiment of the present application can be integrated together to form an independent part, or each module can exist independently, or two or more modules can be integrated to form an independent part.

[0098] If the functions are implemented in the form of software function modules and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for enabling a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0099] The above description is merely an optional embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A battery heating control method, characterized in that: The method is applied to a charging heating system, which includes a heating unit, a first switch, a second switch, a heating switch, and a charging interface. One end of the battery unit is electrically connected to the first end of the charging interface via the first switch, and the other end is electrically connected to the second end of the charging interface via the second switch. One end of the heating unit is electrically connected between the first switch and the first end, and the other end is electrically connected between the second switch and the second end via the heating switch. The method includes: When it is determined that the battery unit needs to be charged and heated, the first switch and the second switch are controlled to be disconnected and the heating switch is controlled to be closed, so that the charging device provides power to the heating unit through the charging interface and the heating switch, wherein the vehicle has already completed high voltage application and the heating switch has been kept in the disconnected state since high voltage application; When it is detected that the temperature is greater than a first preset temperature, controlling the first switch and the second switch to be closed and the heating switch to be opened, so that the charging device provides power to the battery unit through the charging interface, the first switch and the second switch; Wherein, when it is determined that the battery unit needs to be charged and heated, controlling the first switch and the second switch to be opened and the heating switch to be closed, so that the charging device provides power to the heating unit through the charging interface and the heating switch, includes: When it is determined that the battery is connected to the charging device and needs to be charged and heated, the heating switch is controlled to be closed, and the current output by the charging device is adjusted so that the current value of the current output by the charging device is less than a preset current value; When the current value of the current output by the charging device is less than the preset current value, controlling the closed first switch and the second switch to be opened; Parameters of the electric energy output by the charging device are adjusted to provide electric energy to the heating unit through the heating switch.

2. The method according to claim 1, characterized in that When it is determined that the battery cell needs to be charged and heated, before controlling the first switch and the second switch to be opened and the heating switch to be closed so that the charging device provides power to the heating unit through the charging interface and the heating switch, the method further includes: When it is determined that the battery unit needs to be charged and a charging gun of the charging device is detected to be inserted, high voltage is applied to the entire vehicle, wherein, when the high voltage is applied successfully, the first switch and the second switch are in a closed state; When the high voltage is applied successfully, the step of controlling the first switch and the second switch to be opened and the heating switch to be closed is performed.

3. The method according to any one of claims 1 to 2, characterized in that The method further comprises: If heating is determined to be required again during the charging process, the process returns to the step of controlling the first switch and the second switch to be disconnected and the heating switch to be closed, so that the charging device provides electrical energy to the heating unit through the charging interface and the heating switch until charging is completed.

4. The method according to claim 3, characterized in that The method further comprises: When charging is finished, check whether insulation is needed; When it is determined that insulation is required, high voltage is applied to the entire vehicle again, and after the high voltage is successfully applied, the first switch and the second switch are controlled to be disconnected and the heating switch is closed, so that the charging device can be used to provide the heating unit with the required electrical energy for heating.

5. The method according to claim 4, characterized in that The detection of whether insulation is required includes: Obtain the ambient temperature change trend based on the detection time and the location of the electric vehicle; Whether heat preservation is required is determined according to the ambient temperature change trend and a second preset temperature, wherein the second preset temperature is lower than the first preset temperature.

6. The method according to claim 4, characterized in that The method further comprises: During the heating process due to heat preservation requirements, a heating temperature is obtained; When the heating temperature is greater than a third preset temperature, the heating switch is controlled to be turned off to stop heating, wherein the third preset temperature is greater than the first preset temperature.

7. A battery heating control device, characterized in that: The device is applied to a charging heating system, which includes a heating unit, a first switch, a second switch, a heating switch, and a charging interface. One end of the battery unit is electrically connected to the first end of the charging interface via the first switch, and the other end is electrically connected to the second end of the charging interface via the second switch. One end of the heating unit is electrically connected between the first switch and the first end, and the other end is electrically connected between the second switch and the second end via the heating switch. The device includes: a heating module, configured to, upon determining that the battery unit requires charging and heating, control the first and second switches to be disconnected and the heating switch to be closed, so that the charging device provides electrical energy to the heating unit through the charging interface and the heating switch, wherein the vehicle has currently completed high voltage application and the heating switch has remained in an open state since high voltage application; a charging module, configured to control the first switch and the second switch to be closed and the heating switch to be opened when detecting that the temperature is greater than a first preset temperature, so that the charging device provides power to the battery unit through the charging interface, the first switch, and the second switch; Wherein, the heating module is specifically used for: When it is determined that the battery is connected to the charging device and needs to be charged and heated, the heating switch is controlled to be closed, and the current output by the charging device is adjusted so that the current value of the current output by the charging device is less than a preset current value; When the current value of the current output by the charging device is less than the preset current value, controlling the closed first switch and the second switch to be opened; Parameters of the electric energy output by the charging device are adjusted to provide electric energy to the heating unit through the heating switch.

8. A control device, characterized in that: The system comprises a processor and a memory, wherein the memory stores machine-executable instructions that can be executed by the processor, and the processor can execute the machine-executable instructions to implement the battery heating control method according to any one of claims 1 to 6.

9. A readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the battery heating control method according to any one of claims 1 to 6 is implemented.

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