Control Method and Device of Battery, Mode Conversion Circuit, Charging Pile and Equipment

Abstract

The present application relates to a battery control method and device, a mode conversion circuit, a charging pile and equipment. The mode conversion circuit includes: a mode switching switch, a main negative relay switch and an energy interaction module. When the mode switching switch is not closed and the main negative relay switch is closed, the mode conversion circuit enters a pulse heating mode or a pulse charging mode to perform pulse charging, pulse discharging and energy recovery between the charging pile and the battery through the energy interaction module, and pulse heating or pulse charging of the battery. The present application charges or heats the battery by dynamically switching the working mode of the mode conversion circuit integrated at the charging pile end, which not only improves the heating speed and heating uniformity while reducing the cost of the entire vehicle, but also reduces the risk of lithium plating while ensuring the charging speed. In addition, it improves the charging efficiency and safety while avoiding energy waste.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery control method and device, a mode conversion circuit, a charging pile and equipment. Background Art

[0002] In related technologies, due to the differences in hardware configurations of heating systems in different models, some vehicles are only equipped with heating films, liquid cooling and liquid heating, etc., so under low-temperature charging conditions, not only is the heating speed slow, which is not conducive to battery charging, but the heating is also uneven, causing large temperature differences in various parts of the battery. This will not only shorten the battery life, but may also cause abnormal increase in internal battery pressure, increasing the risk of short circuit, thermal runaway and even explosion. At the same time, during the charging process, the battery also has serious polarization phenomena, which seriously affects the battery capacity retention rate and long charging time. Summary of the Invention

[0003] One of the purposes of this application is to provide a mode conversion circuit to solve the problems in the related art that during the battery charging process, some vehicles have slow heating speed, uneven heating, long charging time, reduced capacity retention rate, etc. due to hardware differences; the second purpose is to provide a charging pile; the third purpose is to provide a battery control method; the fourth purpose is to provide a battery control device; the fifth purpose is to provide an electronic device; the sixth purpose is to provide a computer-readable storage medium; and the seventh purpose is to provide a computer program product.

[0004] To achieve the above objectives, the present application provides a mode conversion circuit for use in a charging pile, comprising a mode switching switch, a main-negative relay switch, and an energy interaction module. The technical solution employed is as follows:

[0005] The mode switch is connected to the positive terminal of the charging pile and the positive terminal of the vehicle's battery respectively;

[0006] The main negative relay switch is connected to the negative terminal of the charging pile and the negative terminal of the battery respectively;

[0007] The energy interaction module is connected to the mode switch and the negative terminal of the charging pile respectively;

[0008] When the mode switch is closed and the main negative relay switch is closed, the mode conversion circuit enters the DC charging mode to perform DC charging for the battery through the charging pile;

[0009] When the mode switching switch is not closed and the main negative relay switch is closed, the mode conversion circuit enters the pulse heating mode or the pulse charging mode to perform pulse charging, pulse discharging and energy recovery between the charging pile and the battery through the energy interaction module to perform pulse heating or pulse charging on the battery.

[0010] According to the above technical means, by integrating a mode conversion circuit at the charging pile end, using a mode switching switch and a main negative relay switch to dynamically switch the working mode of the mode conversion circuit, on the basis of supporting the charging pile to perform DC charging of the battery, it also supports the coupling of pulse charging, pulse discharge and energy recovery through the energy interaction module to heat the battery or pulse charge. Therefore, first of all, the energy interaction module quickly heats the battery through pulse charging and discharging, without considering the hardware differences between different models, thereby improving the heating speed and heating uniformity, and reducing the possibility of shortened life and thermal runaway due to uneven heating, thereby greatly extending the battery life and reducing operation and maintenance costs. At the same time, by Because there is no need to add additional heating devices to each vehicle, the cost of the entire vehicle is reduced; secondly, during the heating process, the battery can be discharged through the energy interaction module, eliminating the inconsistency of the charge state distribution and lithium ion concentration distribution in the thickness direction of the battery, reducing the risk of lithium plating while ensuring the charging speed, greatly improving the polarization phenomenon under high charge state and ensuring the capacity retention rate; thirdly, the energy interaction module can also recover the energy released by depolarization, improving charging efficiency and safety while avoiding energy waste; finally, the same energy interaction module can realize heating, charging, discharging and energy recovery functions, effectively reducing the size of the charging pile and saving hardware costs. In addition, the negative terminal of the charging pile and the negative terminal of the battery are connected through the main negative relay switch, which not only realizes the automatic on-off control of the circuit, but also effectively protects the circuit from damage caused by reverse current.

[0011] Furthermore, the DC charging mode includes a constant voltage charging mode or a constant current charging mode. When the mode switching switch is closed and the main negative relay switch is closed, the mode conversion circuit enters the constant voltage charging mode to perform constant voltage charging for the battery through the charging pile, or the mode conversion circuit enters the constant current charging mode to perform constant current charging for the battery through the charging pile; wherein, the constant voltage charging mode or the constant current charging mode is determined based on the first message sent by the vehicle's battery management system.

[0012] According to the above technical means, on the one hand, the constant voltage charging mode or constant current charging mode is dynamically determined through the interactive messages between the battery management system and the charging pile. Since no additional hardware circuit is required, the hardware complexity and failure rate are reduced, and the decoupling of the battery management algorithm and the charging pile execution layer is realized, thereby achieving the purpose of optimal energy management and equipment protection; on the other hand, the charging pile can charge the battery pack with constant voltage or constant current by adjusting the switching state of the mode switching switch and the main negative relay switch, thereby realizing customized charging management of the battery, reducing polarization effect and lithium plating risk, and achieving the purpose of adapting to battery characteristic requirements; on the other hand, during the charging process, the BMS can dynamically adjust the interactive messages according to the battery's state of charge to achieve intelligent switching between constant voltage mode and constant current mode, and / or dynamic configuration of constant voltage parameters or constant current parameters, thereby improving charging efficiency and safety while extending battery life.

[0013] Furthermore, the mode conversion circuit also includes: a pre-charging switch and a pre-charging resistor, which are respectively connected to the positive terminal of the charging pile and the mode switching switch; a bus capacitor, which is respectively connected to the pre-charging switch and the negative terminal of the charging pile; when the pre-charging switch is not closed, the mode conversion circuit enters the pre-charging mode to pre-charge the bus capacitor through the charging pile.

[0014] According to the above technical means, before heating or charging the battery, the charging pile pre-charges the bus capacitor through the pre-charging resistor, so as to slowly establish a voltage gradient using the pre-charging resistor, which not only avoids the generation of instantaneous large current during direct conduction and protects the various components in the circuit from stress damage, but also makes the voltage of the bus capacitor gradually approach the battery terminal voltage, so as to reduce the voltage difference when the main negative relay is closed to a safe range, extend the life of each component, and achieve the purpose of hardware protection and safety enhancement.

[0015] Furthermore, the energy interaction module includes a first switch module and an energy storage module. The first switch module is connected to the mode switching switch and the energy storage module, respectively; the energy storage module is connected to the first switch module and the negative end of the charging pile, respectively; when the first switch module is in a closed state, the battery is pulse charged through the charging pile; when the first switch module is in an unclosed state, pulse charging, pulse discharge and energy recovery are performed between the charging pile and the battery through the energy storage module.

[0016] According to the above technical means, by setting up the first switch module, during the charging process, the charging pile can adjust the conduction state of the first switch module to not only perform pulse charging for the battery, but also discharge the battery and recover the energy released by depolarization through the charging, discharging and energy recovery of the energy storage module, thereby achieving an optimal balance between charging efficiency, safety and energy management.

[0017] Furthermore, the energy storage module includes a second switch module, a third switch module, a fourth switch module, a fifth switch module, a seventh switch module, a tenth switch module and a first energy storage module, the second switch module is respectively connected to the positive terminal of the battery and the fourth switch module; the third switch module is respectively connected to the positive terminal of the battery and the fifth switch module; the fourth switch module is respectively connected to the second switch module and the negative terminal of the charging pile; the fifth switch module is respectively connected to the third switch module and the negative terminal of the charging pile; the seventh switch module is respectively connected to the second switch module and the first energy storage module; the tenth switch module is respectively connected to the first energy storage module and the fifth switch module; when the states of all switch modules in the first switch module set are in the closed state and the When the states of all switch modules in the second switch module set are in an unclosed state, energy is stored for the first inductor in the first energy storage module through the battery. The first switch module set includes the second switch module, the fifth switch module and the seventh switch module, and the second switch module set includes the third switch module, the fourth switch module and the tenth switch module. When the states of all switch modules in the third switch module set are in a closed state and the states of all switch modules in the fourth switch module set are in an unclosed state, energy is stored for the first capacitor in the first energy storage module through the battery. The third switch module set includes the second switch module, the fifth switch module, the seventh switch module and the tenth switch module, and the fourth switch module set includes the third switch module and the fourth switch module.

[0018] According to the above technical means, on the one hand, by arranging multiple switch modules in the energy storage module, the charging pile can adjust the conduction state of each switch module, which can not only make the battery discharge drive the first inductor to store energy, so as to achieve the purpose of battery depolarization or pulse discharge uniform heat generation, but also make the battery and the first inductor drive the first capacitor to store and recover energy with a certain current, so as to achieve the purpose of recovering energy during battery depolarization or uniform heat generation, thereby achieving the optimal balance between safety and energy management; on the other hand, the conduction state of each switch module is switched periodically by pulses to control the discharge time of the battery, which greatly improves the uniformity of lithium ion distribution, extends battery life and reduces the risk of thermal runaway.

[0019] Furthermore, the first energy storage module also includes a ninth switch module and an eleventh switch module, the ninth switch module is respectively connected to the first inductor and the first capacitor; the eleventh switch module is respectively connected to the first inductor and the fifth switch module; the first inductor is respectively connected to the seventh switch module and the eleventh switch module; the first capacitor is respectively connected to the ninth switch module and the tenth switch module; when the state of the ninth switch module is in a closed state and the state of the eleventh switch module is in an unclosed state, the first inductor stores energy; when the state of the ninth switch module is in an unclosed state and the state of the eleventh switch module is in a closed state, the first capacitor stores energy.

[0020] According to the above technical means, by providing two switch modules in the first energy storage module, the charging pile can realize the switching between the first inductive energy storage and the first capacitive energy storage by adjusting the conduction state of the two switch modules, giving full play to the complementary advantages of the two energy storage methods and achieving the purpose of battery depolarization and energy recovery.

[0021] Furthermore, the energy storage module also includes a second energy storage module, a seventh switch module and a tenth switch module, which are all connected to the second energy storage module; when the states of all switch modules in the fifth switch module set are in a closed state and the states of all switch modules in the sixth switch module set are in an unclosed state, energy is continued to be stored for the first capacitor through the first inductor and energy is stored for the second inductor in the second energy storage module through the battery. The fifth switch module set includes the third switch module, the fourth switch module and the tenth switch module, and the sixth switch module set includes the second switch module, the fifth switch module and the seventh switch module; when the states of all switch modules in the seventh switch module set are in a closed state and the states of all switch modules in the eighth switch module set are in an unclosed state, energy is stored for the second capacitor in the second energy storage module through the second inductor. The seventh switch module set includes the third switch module, the fourth switch module, the seventh switch module and the tenth switch module, and the eighth switch module set includes the second switch module and the fifth switch module.

[0022] According to the above technical means, firstly, by setting two different energy storage modules in the energy storage module, the charging pile can adjust the conduction state of each switch module to switch the two energy storage modules to work alternately, so as to better meet the depolarization requirements of the battery and ensure the continuity and stability of the charging process; secondly, by adjusting the conduction state of each switch module, the charging pile can not only make the battery discharge drive the second inductor to store energy, so as to achieve the purpose of battery depolarization or pulse discharge uniform heat generation, but also make the first inductor continue to store energy for the first capacitor and the battery and the second inductor drive the second capacitor to store and recover energy with a certain current, so as to achieve the purpose of recovering energy during battery depolarization or uniform heat generation, thereby achieving the optimal balance between safety and energy management; finally, the conduction state of each switch module is switched periodically by pulses to control the discharge time of the battery, which greatly improves the uniformity of lithium ion distribution, extends battery life and reduces the risk of thermal runaway.

[0023] Furthermore, the second energy storage module also includes a sixth switch module and an eighth switch module. The sixth switch module is connected to the second inductor and the seventh switch module, respectively; the eighth switch module is connected to the second capacitor and the second inductor, respectively; the second inductor is connected to the tenth switch module and the sixth switch module, respectively; the second capacitor is connected to the eighth switch module and the tenth switch module, respectively; when the state of the sixth switch module is in a closed state and the state of the eighth switch module is in an unclosed state, the second inductor stores energy; when the state of the sixth switch module is in an unclosed state and the state of the eighth switch module is in a closed state, the second capacitor stores energy.

[0024] According to the above technical means, by setting two switch modules in the second energy storage module, the charging pile can adjust the conduction state of the two switch modules to achieve switching between the second inductive energy storage and the second capacitive energy storage, giving full play to the complementary advantages of the two energy storage methods and achieving the purpose of battery depolarization and energy recovery.

[0025] Furthermore, the energy storage module also includes a third energy storage module, which is respectively connected to the first capacitor of the first energy storage module and the positive end of the target storage medium; the first capacitor is also connected to the negative end of the target storage medium; when the states of all switch modules in the seventh switch module set are in a closed state and the states of all switch modules in the eighth switch module set are in an open state, energy is stored for the third inductor in the third energy storage module through the first capacitor to transfer the energy of the first capacitor to the target storage medium; when the states of all switch modules in the ninth switch module set are in a closed state and the states of all switch modules in the tenth switch module set are in an open state, energy is stored for the first inductor through the battery, energy is continued to be stored for the second capacitor through the second inductor, and energy is stored for the target storage medium through the third inductor. The ninth switch module set includes the second switch module, the fifth switch module, the seventh switch module, the eighth switch module in the second energy storage module, and the eleventh switch module in the first energy storage module. The tenth switch module set includes the third switch module, the fourth switch module, the sixth switch module in the second energy storage module, the ninth switch module in the first energy storage module, and the tenth switch module.

[0026] According to the above technical means, by further providing a third energy storage module in the energy storage module, the charging pile can transfer the energy in the first capacitor to the long-term energy storage medium by adjusting the conduction state of each switch module, thereby ensuring the normal alternating operation of the first energy storage module and the second energy storage module, thereby better meeting the depolarization requirements of the battery and ensuring the continuity and stability of the charging process.

[0027] Furthermore, the energy storage module also includes a fourth energy storage module, which is respectively connected to the second capacitor of the second energy storage module and the positive terminal of the target storage medium; the second capacitor is also connected to the negative terminal of the target storage medium; when the states of all switch modules in the eleventh switch module set are in a closed state and the states of all switch modules in the twelfth switch module set are in an unclosed state, energy is stored for the first capacitor through the battery, and energy is stored for the fourth inductor in the fourth energy storage module through the second capacitor to transfer the energy of the second capacitor to the target storage medium, the eleventh switch module set includes the second switch module, the fifth switch module, the seventh switch module, the ninth switch module and the tenth switch module in the first energy storage module, the twelfth switch module set includes the third switch module, the fourth switch module, the sixth switch module in the second energy storage module, the second storage module the eighth switch module in the energy storage module and the eleventh switch module in the first energy storage module; when the states of all switch modules in the thirteenth switch module set are in the closed state and the states of all switch modules in the fourteenth switch module set are in the unclosed state, energy is continued to be stored for the first capacitor through the first inductor, energy is stored for the second inductor through the battery, and energy is stored for the target storage medium through the fourth inductor. The thirteenth switch module set includes the third switch module, the fourth switch module, the sixth switch module in the second energy storage module, the ninth switch module and the tenth switch module in the first energy storage module, and the fourteenth switch module set includes the second switch module, the fifth switch module, the seventh switch module, the eighth switch module in the second energy storage module, the eleventh switch module in the first energy storage module, the twelfth switch module in the third energy storage module, and the thirteenth switch module in the fourth energy storage module.

[0028] According to the above technical means, on the one hand, by further providing a fourth energy storage module in the energy storage module, the charging pile can transfer the energy in the second capacitor to the long-term energy storage medium by adjusting the conduction state of each switch module, thereby ensuring the normal alternating operation of the first energy storage module and the second energy storage module, thereby better meeting the depolarization requirements of the battery and ensuring the continuity and stability of the charging process; on the other hand, by releasing energy to the same energy storage medium through the first capacitor and the second capacitor, the energy storage cost is reduced.

[0029] A charging pile, comprising a mode conversion unit and a control unit, wherein the mode conversion unit comprises any one of the above-mentioned mode conversion circuits, wherein:

[0030] The control unit is connected to the mode conversion unit and is used to control the mode conversion circuit to enter the target operating mode based on the second message sent by the vehicle's battery management system; the target operating mode includes a DC charging mode, a pulse heating mode or a pulse charging mode.

[0031] According to the above technical means, on the one hand, the target working mode of the mode conversion circuit is dynamically determined through the interactive messages between the battery management system and the charging pile, thereby realizing dynamic regulation of the charging mode and better meeting the charging needs of different vehicles; on the other hand, by integrating the mode conversion circuit at the charging pile end, the mode switching switch and the main negative relay switch are used to dynamically switch the working mode of the mode conversion circuit. On the basis of supporting the charging pile to perform DC charging of the battery, it also supports the coupling of pulse charging, pulse discharge and energy recovery through the energy interaction module to heat or pulse charge the battery. Therefore, first of all, the energy interaction module quickly heats the battery through pulse charging and discharging, without considering the hardware differences between different models, thereby improving the heating speed and heating uniformity, and reducing the heating caused by uneven heating. The possibility of shortened life and thermal runaway is reduced, thereby greatly extending the battery life and reducing operation and maintenance costs. At the same time, since there is no need to add additional heating devices to each vehicle, the cost of the entire vehicle is reduced; secondly, during the heating process, the battery can be discharged through the energy interaction module, eliminating the inconsistency of the charge state distribution and lithium ion concentration distribution in the thickness direction of the battery, reducing the risk of lithium plating while ensuring the charging speed, greatly improving the polarization phenomenon under high charge state and ensuring the capacity retention rate; thirdly, the energy interaction module can also recover the energy released by depolarization, avoiding energy waste while improving charging efficiency and safety; finally, the same energy interaction module can realize functions such as heating, charging, discharging and energy recovery, effectively reducing the volume of the charging pile and saving hardware costs.

[0032] Furthermore, the control unit is also used for at least one of the following: based on the first message sent by the battery management system, controlling the mode conversion circuit to enter the constant voltage charging mode or the constant current charging mode, so that the mode conversion circuit performs DC charging for the battery according to the target voltage or target current; based on the third message sent by the battery management system, switching the current direction of the mode conversion circuit within the target cycle to perform pulse charging and pulse discharging on the battery.

[0033] According to the above technical means, on the one hand, first, the constant voltage charging mode or constant current charging mode is dynamically determined through the interactive message between the BMS and the charging pile. Since no additional hardware circuit is required, the hardware complexity and failure rate are reduced, and the decoupling of the battery management algorithm and the charging pile execution layer is realized, achieving the purpose of optimal energy management and equipment protection; secondly, the charging pile can charge the battery pack with constant voltage or constant current by adjusting the switching state of the mode switching switch and the main negative relay switch, realizing customized charging management of the battery, reducing polarization effect and lithium plating risk, and achieving the purpose of adapting to battery characteristic requirements; finally, during the charging process, the BMS can dynamically adjust the interactive message according to the battery's state of charge to achieve intelligent switching between constant voltage mode and constant current mode, and / or dynamic configuration of constant voltage parameters or constant current parameters, which can improve charging efficiency and safety while extending battery life. On the other hand, the working mode of the mode conversion circuit is switched through interactive messages between the BMS and the charging pile, so that the charging pile can periodically adjust parameters such as the charging and discharging current and charging and discharging time. This not only improves the rationality, flexibility and intelligence of battery charging, but also improves charging safety while ensuring charging efficiency, thereby greatly extending battery life.

[0034] Furthermore, the control unit is also used to: determine the on-time of the first switch module in the energy interaction module based on the third message; during the on-time of the first switch module, control the state of the first switch module to be a closed state, so as to perform pulse charging for the battery through the charging pile; outside the on-time of the first switch module, control the state of the first switch module to be an unclosed state, and control the energy storage module in the energy interaction module to perform pulse charging, pulse discharging and energy recovery between the charging pile and the battery.

[0035] According to the above technical means, on the one hand, by setting the first switch module, during the charging process, the charging pile can adjust the conduction state of the first switch module, not only to perform pulse charging for the battery, but also to discharge the battery and recover the energy released by depolarization through the charging, discharging and energy recovery of the energy storage module, thereby achieving an optimal balance between charging efficiency, safety and energy management; on the other hand, the conduction time of the first switch module is dynamically determined through the interactive messages between the BMS and the charging pile to adapt to the charging requirements of different BMSs, thereby improving the accuracy and flexibility of the conduction time, thereby reducing the fluctuation of voltage or current during the charging process.

[0036] Furthermore, the control unit is also used to: within the target time period, control the states of all switch modules in the first target switch module set to be in a closed state and the states of all switch modules in the second target switch module set to be in an unclosed state, so as to store energy for the target object of the energy storage module; wherein, the target time period is determined based on the third message, and the target time period includes at least one of the following: a first time period, a second time period, a third time period, a fourth time period, a fifth time period, a sixth time period, and a seventh time period; when the target time period is the first time period, the first target switch module set includes the first switch module set, the second target switch module set includes the second switch module set, and the target object includes the first inductor in the first energy storage module of the energy storage module; when the target time period is the second time period, the first target switch module set includes the third switch module set, the second target switch module set includes the fourth switch module set, and the target object includes the first capacitor in the first energy storage module; when the target time period is the third time period, the first target switch module set includes the fifth switch module set, and the second target switch module set includes the sixth A switch module set, wherein the target objects include the first capacitor and the second inductor in the second energy storage module of the energy storage module; when the target time period is the fourth time period, the first target switch module set includes the seventh switch module set, the second target switch module set includes the eighth switch module set, and the target objects include the second capacitor in the second energy storage module and the third inductor in the third energy storage module of the energy storage module; when the target time period is the fifth time period, the first target switch module set includes the ninth switch module set, the second target switch module set includes the tenth switch module set, and the target objects include the first inductor, the second capacitor, and the target storage medium; when the target time period is the sixth time period, the first target switch module set includes the eleventh switch module set, the second target switch module set includes the twelfth switch module set, and the target objects include the first capacitor and the fourth inductor in the fourth energy storage module of the energy storage module; when the target time period is the seventh time period, the first target switch module set includes the thirteenth switch module set, the second target switch module set includes the fourteenth switch module set, and the target objects include the first capacitor, the second inductor, and the target storage medium.

[0037] According to the above technical means, on the one hand, the on-time of each switch module is dynamically determined through the interactive messages between the BMS and the charging pile to adapt to the charging needs of different stages, thereby improving the accuracy and flexibility of the on-time; on the other hand, by setting multiple switch modules in the energy storage module, the charging pile can adjust the on-state of each switch module to achieve energy storage of the inductor, energy storage of the capacitor and / or energy storage of the target storage medium in different time periods, thereby not only achieving the purpose of uniform heat generation during battery depolarization or pulse discharge, but also achieving the purpose of energy recovery during battery depolarization or uniform heat generation, thereby achieving the optimal balance between safety and energy management; on the other hand, by setting multiple energy storage modules, not only can the depolarization requirements of the battery be better met and the continuity and stability of the charging process be ensured, but also the energy in each capacitor can be transferred to the same long-term energy storage medium to ensure the normal alternating operation of each energy storage module, thereby reducing the energy storage cost.

[0038] A battery control method, applied to a control unit of any of the above charging piles, comprising:

[0039] Determining a target operating mode of the mode conversion circuit based on a second message sent by a battery management system of the vehicle; wherein the target operating mode includes a DC charging mode, a pulse heating mode, or a pulse charging mode;

[0040] The control mode conversion circuit enters a target operation mode to perform DC charging, pulse heating or pulse charging on the battery.

[0041] According to the above technical means, on the one hand, the target working mode of the mode conversion circuit is dynamically determined through the interactive messages between the battery management system and the charging pile, thereby realizing dynamic regulation of the charging mode and better meeting the charging needs of different vehicles; on the other hand, by integrating the mode conversion circuit at the charging pile end, the mode switching switch and the main negative relay switch are used to dynamically switch the working mode of the mode conversion circuit. On the basis of supporting the charging pile to perform DC charging of the battery, it also supports the coupling of pulse charging, pulse discharge and energy recovery through the energy interaction module to heat or pulse charge the battery. Therefore, first of all, the energy interaction module quickly heats the battery through pulse charging and discharging, without considering the hardware differences between different models, thereby improving the heating speed and heating uniformity, and reducing the heating caused by uneven heating. The possibility of shortened life and thermal runaway is reduced, thereby greatly extending the battery life and reducing operation and maintenance costs. At the same time, since there is no need to add additional heating devices to each vehicle, the cost of the entire vehicle is reduced; secondly, during the heating process, the battery can be discharged through the energy interaction module, eliminating the inconsistency of the charge state distribution and lithium ion concentration distribution in the thickness direction of the battery, reducing the risk of lithium plating while ensuring the charging speed, greatly improving the polarization phenomenon under high charge state and ensuring the capacity retention rate; thirdly, the energy interaction module can also recover the energy released by depolarization, avoiding energy waste while improving charging efficiency and safety; finally, the same energy interaction module can realize functions such as heating, charging, discharging and energy recovery, effectively reducing the volume of the charging pile and saving hardware costs.

[0042] A battery control device, applied to the control unit of any of the above charging piles, comprising:

[0043] a determination module, configured to determine a target mode of the mode conversion circuit based on a second message sent by a battery management system of the vehicle; wherein the target mode includes a DC charging mode, a pulse heating mode, or a pulse charging mode;

[0044] The control module is used to control the mode conversion circuit to enter the target mode to perform DC charging, pulse heating or pulse charging on the battery.

[0045] An electronic device includes a processor and a memory, wherein the memory stores a computer program that can be run on the processor, and the processor implements any of the above methods when executing the computer program.

[0046] A computer-readable storage medium stores a computer program, which implements any of the above methods when executed by a processor.

[0047] A computer program product includes a computer program or instructions, and when the computer program or instructions are executed by a processor, any of the above methods is implemented.

[0048] Beneficial effects of this application:

[0049] (1) Before heating or charging the battery, the charging pile pre-charges the bus capacitor through the pre-charging resistor to slowly establish a voltage gradient using the pre-charging resistor. This not only avoids the generation of instantaneous large current when directly turned on, protecting the various components in the circuit from stress damage, but also makes the voltage of the bus capacitor gradually approach the battery terminal voltage, so as to reduce the voltage difference when the main negative relay is closed to a safe range, extend the life of each component, and achieve the purpose of hardware protection and safety enhancement;

[0050] (2) The negative terminal of the charging pile and the negative terminal of the battery are connected through the main negative relay switch, which not only realizes the automatic on-off control of the circuit, but also effectively protects the circuit from damage caused by reverse current;

[0051] (3) The target operating mode of the mode conversion circuit is dynamically determined through interactive messages between the battery management system and the charging pile, realizing dynamic regulation of the charging mode and better meeting the charging needs of different vehicles;

[0052] (4) The mode switching switch and the main negative relay switch are used to dynamically switch the working mode of the mode conversion circuit. On the basis of supporting the DC charging of the battery by the charging pile, it also supports the coupling of pulse charging, pulse discharge and energy recovery through the energy interaction module to heat the battery or pulse charge. Therefore, first of all, the energy interaction module quickly heats the battery through pulse charging and discharging, without considering the hardware differences between different models, improving the heating speed and heating uniformity, and reducing the possibility of shortening the life and thermal runaway caused by uneven heating, thereby greatly extending the battery life and reducing operation and maintenance costs. At the same time, since there is no need to add Adding an additional heating device reduces the cost of the entire vehicle. Secondly, during the heating process, the battery can be discharged through the energy interaction module, eliminating the inconsistency of the charge state distribution and lithium ion concentration distribution in the thickness direction of the battery, reducing the risk of lithium plating while ensuring the charging speed, greatly improving the polarization phenomenon under high charge state and ensuring the capacity retention rate. Thirdly, the energy interaction module can also recover the energy released by depolarization, improving charging efficiency and safety while avoiding energy waste. Finally, the same energy interaction module can realize heating, charging, discharging and energy recovery functions, effectively reducing the volume of the charging pile and saving hardware costs.

[0053] (5) Dynamically determine the constant voltage charging mode or constant current charging mode through the interactive message between the battery management system and the charging pile. Since no additional hardware circuit is required, the hardware complexity and failure rate are reduced, and the decoupling of the battery management algorithm and the charging pile execution layer is realized, achieving the purpose of optimal energy management and equipment protection; at the same time, the charging pile can charge the battery pack with constant voltage or constant current by adjusting the switch state of the mode switching switch and the main negative relay switch, realizing customized charging management of the battery, reducing the polarization effect and lithium plating risk, and achieving the purpose of adapting to the battery characteristics requirements; In addition, during the charging process, the BMS can dynamically adjust the interactive message according to the battery's state of charge to achieve intelligent switching between constant voltage mode and constant current mode, and / or dynamic configuration of constant voltage parameters or constant current parameters, which can improve charging efficiency and safety while extending battery life;

[0054] (6) The working mode of the mode conversion circuit is switched through interactive messages between the BMS and the charging pile, so that the charging pile can periodically adjust the charging and discharging current, charging and discharging time and other parameters. This not only improves the rationality, flexibility and intelligence of battery charging, but also improves charging safety while ensuring charging efficiency, thereby greatly extending the battery life;

[0055] (7) By setting up multiple energy storage modules, not only can the depolarization requirements of the battery be better met and the charging process be continuous and stable, but the energy in each capacitor can also be transferred to the same long-term energy storage medium to ensure the normal alternating operation of each energy storage module, thereby reducing the energy storage cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 A schematic diagram of the structure of a mode conversion circuit provided in an embodiment of the present application Figure 1 ;

[0057] Figure 2 A schematic diagram of the structure of a mode conversion circuit provided in an embodiment of the present application Figure 2 ;

[0058] Figure 3 A schematic diagram of the structure of a mode conversion circuit provided in an embodiment of the present application Figure 3 ;

[0059] Figure 4 A schematic diagram of the circuit structure of a first energy storage module provided in an embodiment of the present application;

[0060] Figure 5 A schematic diagram of the structure of a mode conversion circuit provided in an embodiment of the present application Figure 4 ;

[0061] Figure 6A schematic diagram of the circuit composition structure of a second energy storage module provided in an embodiment of the present application;

[0062] Figure 7 A schematic diagram of the structure of a mode conversion circuit provided in an embodiment of the present application Figure 5 ;

[0063] Figure 8 A schematic diagram of the circuit structure of a third energy storage module provided in an embodiment of the present application;

[0064] Figure 9 A schematic diagram of the structure of a mode conversion circuit provided in an embodiment of the present application Figure 6 ;

[0065] Figure 10 A schematic diagram of the circuit structure of a fourth energy storage module provided in an embodiment of the present application;

[0066] Figure 11 A schematic diagram of the structure of a mode conversion circuit provided in an embodiment of the present application Figure 7 ;

[0067] Figure 12 A schematic diagram of the circuit structure of a mode conversion circuit provided in an embodiment of the present application;

[0068] Figure 13 Schematic diagram of current flow in a mode conversion circuit provided in an embodiment of the present application Figure 1 ;

[0069] Figure 14 Schematic diagram of current flow in a mode conversion circuit provided in an embodiment of the present application Figure 2 ;

[0070] Figure 15 Schematic diagram of current flow in a mode conversion circuit provided in an embodiment of the present application Figure 3 ;

[0071] Figure 16 Schematic diagram of current flow in a mode conversion circuit provided in an embodiment of the present application Figure 4 ;

[0072] Figure 17 Schematic diagram of current flow in a mode conversion circuit provided in an embodiment of the present application Figure 5 ;

[0073] Figure 18 Schematic diagram of current flow in a mode conversion circuit provided in an embodiment of the present application Figure 6 ;

[0074] Figure 19Schematic diagram of current flow in a mode conversion circuit provided in an embodiment of the present application Figure 7 ;

[0075] Figure 20 Schematic diagram of current flow in a mode conversion circuit provided in an embodiment of the present application Figure 8 ;

[0076] Figure 21 Schematic diagram of current flow in a mode conversion circuit provided in an embodiment of the present application Figure 9 ;

[0077] Figure 22 A schematic diagram of the structure of a charging pile provided in an embodiment of the present application;

[0078] Figure 23 A schematic diagram of various time periods within a target cycle provided in an embodiment of the present application;

[0079] Figure 24 A schematic diagram of a battery control method according to an embodiment of the present invention;

[0080] Figure 25 A schematic diagram of the structure of a battery control device provided in an embodiment of the present application;

[0081] Figure 26 A schematic diagram of a hardware entity of an electronic device provided in an embodiment of the present application.

[0082] Description of Reference Numerals

[0083] 100, mode conversion circuit; K2, mode switching switch; K3, main negative relay switch; 10, energy interaction module; K1, pre-charge switch; R1, pre-charge resistor; C3, bus capacitor;

[0084] 101, energy storage module; VT2, second switch module; VT3, third switch module; VT4, fourth switch module; VT5, fifth switch module; VT7, seventh switch module; VT10, tenth switch module; D1, first diode; D3, third diode; D4, fourth diode; D6, sixth diode; D7, seventh diode; D8, eighth diode; D9, ninth diode; D10, tenth diode; D11, eleventh diode; D12, twelfth diode; D13, thirteenth diode;

[0085] 1011, first energy storage module; L1, first inductor; C1, first capacitor; VT9, ninth switch module; VT11, eleventh switch module;

[0086] 1012, second energy storage module; L2, second inductor; C2, second capacitor; VT6, sixth switch module; VT8, eighth switch module;

[0087] 1013, third energy storage module; L3, third inductor; VT12, twelfth switch module;

[0088] 1014, fourth energy storage module; L4, fourth inductor; VT13, thirteenth switch module;

[0089] 200, charging pile; A+, positive terminal of the charging pile; A-, negative terminal of the charging pile; 210, mode conversion unit; 220, control unit; control device 250; 251, determination module; 252, control module;

[0090] 300, battery; V+, positive terminal of the battery; V-, negative terminal of the battery;

[0091] 400, target storage medium; X+, positive terminal of the target storage medium; X-, negative terminal of the target storage medium;

[0092] 500, electronic device; 501, processor; 502, communication interface; 503, memory; 504, bus. DETAILED DESCRIPTION

[0093] The following will describe the embodiments of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand the other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for the purpose of illustrating the present application and are not intended to limit the scope of protection of the present application.

[0094] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application. Therefore, the illustrations only show components related to the present application and are not drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component can be changed at will, and the component layout type may also be more complicated.

[0095] In the following description, reference is made to “some embodiments”, which describes a subset of all possible embodiments, but it will be understood that “some embodiments” may be the same subset or different subsets of all possible embodiments and may be combined with each other without conflict.

[0096] In the following description, the terms "first\second\third" involved are merely used to distinguish similar objects and do not represent a specific ordering of the objects. It can be understood that "first\second\third" can be interchanged with a specific order or sequence where permitted, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0097] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein are for the purpose of describing the embodiments of this application only and are not intended to limit this application.

[0098] In the field of modern battery technology, there are two main problems with charging vehicle batteries:

[0099] Question 1: Due to the differences in the hardware configuration of the heating systems of different models, some vehicles are only equipped with heating film, liquid cooling and liquid heating, etc., then under low-temperature charging conditions, not only is the heating speed slow, which is not conducive to battery charging, but the heating is also uneven, causing large temperature differences in various parts of the battery. This will not only shorten the battery life, but may also cause abnormal increase in internal battery pressure, increasing the risk of short circuit, thermal runaway and even explosion.

[0100] Problem 2: During battery charging, the battery's state of charge (SOC) and Li+ (lithium ion) distribution are uneven. Negative electrode particles near the SEI (solid electrolyte interface) membrane have a higher SOC and reach full charge faster; negative electrode particles farther from the SEI membrane have a lower SOC. Continuing to charge at a high rate will cause lithium deposition in the negative electrode particles near the SEI membrane, negatively impacting the battery's capacity retention and safety. Charging at a lower rate will result in a longer charging time.

[0101] The embodiment of the present application provides a mode conversion circuit. By integrating the mode conversion circuit at the charging pile end, the mode switching switch and the main negative relay switch are used to dynamically switch the working mode of the mode conversion circuit. On the basis of supporting the charging pile to perform DC charging of the battery, it also supports the coupling of pulse charging, pulse discharging and energy recovery through the energy interaction module to heat the battery or pulse charge. Therefore, firstly, the energy interaction module quickly heats the battery through pulse charging and discharging, without considering the hardware differences between different models, improving the heating speed and heating uniformity, and reducing the possibility of shortened life and thermal runaway due to uneven heating, thereby greatly extending the battery life and reducing operation and maintenance costs. At the same time, since there is no need to add additional heating devices to each vehicle, the cost of the entire vehicle is reduced. Secondly, during the heating process, the battery can be discharged through the energy interaction module, eliminating the inconsistency of the charge state distribution and lithium ion concentration distribution in the thickness direction of the battery, reducing the risk of lithium plating while ensuring the charging speed, greatly improving the polarization phenomenon under high charge state and ensuring the capacity retention rate. Thirdly, the energy interaction module can also recover the energy released by depolarization, improving charging efficiency and safety while avoiding energy waste. Finally, the same energy interaction module can realize heating, charging, discharging and energy recovery functions, effectively reducing the size of the charging pile and saving hardware costs. In addition, the negative terminal of the charging pile and the negative terminal of the battery are connected through the main negative relay switch, which not only realizes the automatic on-off control of the circuit, but also effectively protects the circuit from damage by reverse current.

[0102] Below, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application.

[0103] Figure 1 A schematic diagram of the structure of a mode conversion circuit provided in an embodiment of the present application Figure 1 , applied to charging piles, such as Figure 1 As shown, the mode conversion circuit 100 includes a mode switching switch K2, a main negative relay switch K3 and an energy interaction module 10, wherein:

[0104] The mode switching switch K2 is connected to the positive terminal A+ of the charging pile 200 and the positive terminal V+ of the vehicle's battery 300;

[0105] The main negative relay switch K3 is connected to the negative terminal A- of the charging pile 200 and the negative terminal V- of the battery 300 respectively;

[0106] The energy interaction module 10 is connected to the mode switching switch K2 and the negative terminal A- of the charging pile 200 respectively;

[0107] When the mode switching switch K2 is closed and the main negative relay switch K3 is closed, the mode conversion circuit 100 enters the DC charging mode to perform DC charging for the battery 300 through the charging pile 200;

[0108] When the mode switching switch K2 is not closed and the main negative relay switch K3 is closed, the mode conversion circuit 100 enters the pulse heating mode or the pulse charging mode to perform pulse charging, pulse discharging and energy recovery between the charging pile 200 and the battery 300 through the energy interaction module 10, and perform pulse heating or pulse charging on the battery 300.

[0109] Here, the mode switch K2 can be any suitable switch capable of achieving this function, such as a relay switch, a diode, a transistor, an IGBT (Insulated Gate Bipolar Transistor), etc. In some embodiments, the mode switch K2 can be a relay switch, which not only reduces costs but is also particularly suitable for handling high currents or high voltages, with lower contact temperature rise and loss, faster response speed, and longer service life. In practice, by adjusting the open and closed state of the mode switch K2, the positive terminal A+ of the charging pile 200 and the positive terminal V+ of the battery 300 can be connected.

[0110] The main negative relay switch K3 primarily controls negative current, providing circuit isolation and reverse current protection, effectively protecting the circuit from reverse current damage. By adjusting the on / off state of the main negative relay switch K3, the negative terminal A- of the charging pile 200 and the negative terminal V- of the battery 300 can be connected.

[0111] DC charging, also known as fast charging, is a method that can quickly replenish a vehicle's battery. Its core is to convert AC power into DC power and supply it directly to the battery at high power.

[0112] During implementation, by controlling the mode switching switch K2 to be closed and the main negative relay switch K3 to be closed, the mode conversion circuit 100 enters the DC charging mode to perform DC charging for the battery 300 through the charging pile 200. At this time, the current starts from A+, passes through K2, V+, V- and K3 in sequence, and finally returns to A-.

[0113] Throughout the charging process, the constant voltage or constant current provided by the charging station 200 can be dynamically changed. In some embodiments, when the battery is deeply discharged, constant current charging can be used to quickly replenish the battery; when the battery SOC is close to full charge, constant voltage charging can be switched to prevent overcharging.

[0114] In some embodiments, the DC charging parameters during the DC charging process can be adjusted based on the first message sent by the BMS. The DC charging parameters may include, but are not limited to, the type of DC charging mode, voltage value, current value, charging duration, etc. The types of DC charging modes include, but are not limited to, constant voltage charging mode, constant current charging mode, etc. The first message may carry DC charging parameters, first indication information, etc. The first indication information may be any suitable information that can indicate the DC charging parameters. By parsing the first message, the DC charging parameters can be determined. In some embodiments, the charging pile 200 can pre-set multiple DC charging parameters and determine the adapted DC charging parameters from the multiple DC charging parameters based on the first indication information in the first message.

[0115] In some embodiments, the DC charging mode includes a constant voltage charging mode or a constant current charging mode. When the mode switching switch K2 is closed and the main negative relay switch K3 is closed, the mode conversion circuit 100 enters a constant voltage charging mode to perform constant voltage charging for the battery 300 through the charging pile 200, or the mode conversion circuit 100 enters a constant current charging mode to perform constant current charging for the battery 300 through the charging pile 200; wherein, the constant voltage charging mode or the constant current charging mode is determined based on the first message sent by the battery management system of the vehicle.

[0116] Here, constant voltage charging mode maintains a constant voltage while charging, with the current decaying as the battery's SOC increases. This mode is suitable for later-stage battery charging to avoid overcharging risks. The constant voltage can be any suitable voltage, for example, 4.2V (volts). In some embodiments, the constant voltage can be determined based on the first message or other means.

[0117] Constant current charging mode maintains a constant current, with the voltage varying as the battery's SOC increases. This mode is suitable for initial charging and rapid charging. The constant current can be any suitable current, for example, 1A (ampere). In some embodiments, the constant current can be determined based on the first message or other means.

[0118] The first message may include any appropriate content. In some embodiments, the first message may include the type of DC charging mode. By parsing the first message, the type of DC charging mode required by the BMS can be obtained. In some embodiments, when the first message does not include the type of DC charging mode, the default constant voltage charging mode or constant current charging mode may be used as the type of DC charging mode.

[0119] During implementation, according to the DC charging parameters, the charging pile 200 performs energy output to perform constant voltage charging or constant current charging on the battery 300 .

[0120] In the implementation mode of the present application, on the one hand, the constant voltage charging mode or the constant current charging mode is dynamically determined through the interactive messages between the battery management system and the charging pile. Since no additional hardware circuit is required, the hardware complexity and failure rate are reduced, and the decoupling of the battery management algorithm and the charging pile execution layer is realized, thereby achieving the purpose of optimal energy management and equipment protection; on the other hand, the charging pile can charge the battery pack at a constant voltage or a constant current by adjusting the switching state of the mode switching switch and the main negative relay switch, thereby realizing customized charging management of the battery, reducing the polarization effect and the risk of lithium plating, and achieving the purpose of adapting to the battery characteristics requirements; on the other hand, during the charging process, the BMS can dynamically adjust the interactive messages according to the battery's state of charge to achieve intelligent switching between constant voltage mode and constant current mode, and / or dynamic configuration of constant voltage parameters or constant current parameters, thereby improving charging efficiency and safety while extending battery life.

[0121] In some embodiments, before charging the battery 300, the charging station 200 can interact with the BMS and determine the operating mode of the mode conversion circuit 100 through a second message sent by the BMS. The second message can carry the operating mode, second indication information, etc. The second indication information can be any suitable information that can indicate the operating mode. By parsing the second message, the operating mode can be determined. In some embodiments, the charging station 200 can pre-set multiple operating modes and determine the appropriate operating mode from the multiple operating modes based on the second indication information in the second message.

[0122] The working mode of the mode conversion circuit 100 may include but is not limited to a DC charging mode, a pulse heating mode, a pulse charging mode, etc. The pulse heating mode is mainly used to perform pulse heating on the battery 300, and is suitable for low-temperature charging conditions, preheating of the battery 300, etc., by using high-frequency current pulses to stimulate the internal resistance of the battery 300 to generate heat, and quickly increase the temperature of the battery 300. The pulse charging mode is mainly used to perform pulse charging on the battery 300, and is suitable for the battery 300 to be in a high SOC condition, etc., by using intermittent current input to achieve efficient power injection, while reducing polarization effects and heat accumulation. During implementation, both the pulse heating mode and the pulse charging mode can be achieved through high-frequency pulse charging and pulse discharging, the difference being the corresponding charge and discharge parameters during charging and discharging. In some embodiments, the charge and discharge parameters can be determined by a third message sent by the BMS, and the battery 300 can be pulse heated or pulse charged according to the charge and discharge parameters. The third message can carry charge and discharge parameters, third indication information, etc. The third indication information can be any suitable information that can indicate charge and discharge parameters. The charge and discharge parameters may include but are not limited to charge and discharge current, charge and discharge frequency, f, charge and discharge duty cycle D, etc. In some embodiments, the battery 300 may also be pulse heated or pulse charged according to default charge and discharge parameters. In some embodiments, the charging station 200 may preset multiple charge and discharge parameters and determine the appropriate charge and discharge parameters from the multiple charge and discharge parameters based on the third indication information in the third message.

[0123] The energy interaction module 10 can be any suitable circuit capable of implementing this function. In practice, when the mode switching switch K2 is not closed and the main negative relay switch K3 is closed, the mode conversion circuit 100 enters the pulse heating mode or the pulse charging mode. In the pulse heating mode or the pulse charging mode, the energy interaction module 10 performs pulse heating or pulse charging on the battery 300 by cyclically performing pulse charging, pulse discharging, and energy recovery throughout the process. K2 not being closed means that K2 is in the disconnected state.

[0124] In some embodiments, the energy interaction module 10 may include but is not limited to at least one of at least one switch module, at least one inductor, at least one capacitor, etc. In some embodiments, the energy interaction module 10 may further include at least one electrical switch.

[0125] The switch module (including other switch modules mentioned below) can be any suitable module capable of performing on / off functions. For example, the switch module may include an IGBT, or an IGBT + a diode. Another example is a transistor, or a transistor + a diode. The states of the switch module may include, but are not limited to, a closed state and an open state. The closed state indicates that the switch module is in the on state, during which the switch module is operating normally. The open state indicates that the switch module is in the off state, during which the switch module is not operating.

[0126] The inductor (including other inductors mentioned below) can be of any suitable size, and the energy discharged from the battery can be recovered through the inductor. During implementation, those skilled in the art can independently set the size and number of inductors based on actual needs, and the embodiments of this application are not limited thereto.

[0127] The capacitor (including other capacitors mentioned below) can be of any suitable size. For example, the capacitor can be large to better recover energy, and can recover energy released by the inductor and / or energy during battery discharge through the capacitor. During implementation, those skilled in the art can independently determine the size and number of capacitors based on actual needs, and the embodiments of this application are not limited thereto.

[0128] The electrical switch may be any suitable switch, for example, a diode, a transistor, a single-pole switch, etc.

[0129] In some embodiments, the energy interaction module 10 includes a first switch module VT1 and an energy storage module 101. Figure 2 As shown, where:

[0130] The first switch module VT1 is connected to the mode switching switch K2 and the energy storage module 101 respectively;

[0131] The energy storage module 101 is connected to the first switch module VT1 and the negative terminal A- of the charging pile 200 respectively;

[0132] When the first switch module VT1 is in a closed state, the battery 300 is pulse charged through the charging pile 200;

[0133] When the first switch module VT1 is in an open state, pulse charging, pulse discharging, and energy recovery are performed between the charging pile 200 and the battery 300 through the energy storage module 101 .

[0134] Here, VT1 can be any suitable module capable of performing on / off functions. VT1's on-time can be determined based on the third message sent by the BMS. In practice, in pulse heating mode, VT1's on-time is shorter; in pulse charging mode, VT1's on-time is longer.

[0135] Energy storage module 101 may be any suitable circuit capable of achieving this function. In some embodiments, energy storage module 101 includes at least one energy storage module. Energy storage module 101 may include at least one of at least one switch module, at least one inductor, at least one capacitor, etc. In some embodiments, energy storage module 101 may also include at least one electronic switch.

[0136] Since K2 is disconnected and K3 is closed, when VT1 is in the closed state, the current starts from A+, passes through VT1, V+, V- and K3 in sequence, and finally returns to A-, realizing pulse charging of the battery 300 by the charging pile 200.

[0137] When the pulse charging of the battery 300 is completed, the state of VT1 can be switched to an unclosed state to realize the discharge of the battery 300. During the discharge process of the battery 300, pulse charging, pulse discharging and energy recovery are realized through the energy storage module 101.

[0138] In the embodiment of the present application, by setting up the first switch module, during the charging process, the charging pile can adjust the conduction state of the first switch module to not only perform pulse charging for the battery, but also discharge the battery and recover the energy released by depolarization through the charging, discharging and energy recovery of the energy storage module, thereby achieving an optimized balance between charging efficiency, safety and energy management.

[0139] In some embodiments, the energy storage module 101 includes a second switch module VT2, a third switch module VT3, a fourth switch module VT4, a fifth switch module VT5, a seventh switch module VT7, a tenth switch module VT10 and a first energy storage module 1011. Figure 3 As shown, where:

[0140] The second switch module VT2 is connected to the positive terminal V+ of the battery 300 and the fourth switch module VT4 respectively;

[0141] The third switch module VT3 is connected to the positive terminal V+ of the battery 300 and the fifth switch module VT5 respectively;

[0142] The fourth switch module VT4 is connected to the second switch module VT2 and the negative terminal A- of the charging pile 200 respectively;

[0143] The fifth switch module VT5 is connected to the third switch module VT3 and the negative terminal A- of the charging pile 200 respectively;

[0144] The seventh switch module VT7 is connected to the second switch module VT2 and the first energy storage module 1011 respectively;

[0145] The tenth switch module VT10 is connected to the first energy storage module 1011 and the fifth switch module VT5 respectively;

[0146] When the states of all switch modules in the first switch module set are in the closed state and the states of all switch modules in the second switch module set are in the open state, the battery 300 is used to store energy for the first inductor L1 in the first energy storage module 1011. The first switch module set includes the second switch module VT2, the fifth switch module VT5, and the seventh switch module VT7. The second switch module set includes the third switch module VT3, the fourth switch module VT4, and the tenth switch module VT10.

[0147] When the states of all switch modules in the third switch module set are in a closed state and the states of all switch modules in the fourth switch module set are in an unclosed state, the battery 300 is used to store energy for the first capacitor C1 in the first energy storage module 1011. The third switch module set includes the second switch module VT2, the fifth switch module VT5, the seventh switch module VT7 and the tenth switch module VT10, and the fourth switch module set includes the third switch module VT3 and the fourth switch module VT4.

[0148] Here, VT2, VT3, VT4, VT5, VT7, and VT10 can be any suitable modules that can realize the on-off function, and their on-time can be determined according to the third message sent by the BMS.

[0149] The first energy storage module 1011 can be any suitable circuit capable of achieving this function. In some embodiments, the first energy storage module 1011 can include at least one of at least one switch module, at least one inductor, at least one capacitor, etc. In some embodiments, the first energy storage module 1011 can also include at least one electronic switch.

[0150] During implementation, K2 is disconnected, K3 is closed, VT1 is in an unclosed state, and the battery 300 begins to discharge.

[0151] When VT2, VT5 and VT7 are all closed, and VT3, VT4 and VT10 are not closed, the mode conversion circuit 100 is in the L1 energy storage stage. The current starts from V+, passes through VT2, VT7, the first energy storage module 1011, VT5 and K3 in sequence, and then returns to V- to achieve depolarization of the battery 300 or uniform heat generation.

[0152] When VT2, VT5, VT7 and VT10 are all closed, and VT3 and VT4 are not closed, the mode conversion circuit 100 is in the C1 energy storage stage. The current starts from V+, passes through VT2, VT7, the first energy storage module 1011, VT10, VT5 and K3 in sequence, and returns to V- to achieve energy recovery and storage.

[0153] In some embodiments, the energy storage module 101 further includes D7 and D10, D7 is connected to VT7 and C1 / C2 / D10, respectively, and D10 is connected to C1 / C2 / D7 and VT10, respectively.

[0154] In the embodiment of the present application, on the one hand, by arranging multiple switch modules in the energy storage module, the charging pile can adjust the conduction state of each switch module, which can not only make the battery discharge drive the first inductor to store energy, so as to achieve the purpose of battery depolarization or pulse discharge uniform heat generation, but also make the battery and the first inductor drive the first capacitor to store and recover energy with a certain current, so as to achieve the purpose of recovering energy during battery depolarization or uniform heat generation, thereby achieving the optimal balance between safety and energy management; on the other hand, the conduction state of each switch module is switched periodically by pulses to control the discharge time of the battery, which greatly improves the uniformity of lithium ion distribution, extends battery life and reduces the risk of thermal runaway.

[0155] In some embodiments, the first energy storage module 1011 further includes a ninth switch module VT9 and an eleventh switch module VT11. Figure 4 As shown, where:

[0156] a ninth switch module VT9 connected to the first inductor L1 and the first capacitor C1 respectively;

[0157] an eleventh switch module VT11 connected to the first inductor L1 and the fifth switch module VT5 respectively;

[0158] The first inductor L1 is connected to the seventh switch module VT7 and the eleventh switch module VT11 respectively;

[0159] The first capacitor C1 is connected to the ninth switch module VT9 and the tenth switch module VT10 respectively;

[0160] When the ninth switch module VT9 is in a closed state and the eleventh switch module VT11 is in an open state, the first inductor L1 stores energy;

[0161] When the ninth switch module VT9 is in an open state and the eleventh switch module VT11 is in a closed state, the first capacitor C1 stores energy.

[0162] Here, VT9 and VT11 can be any suitable modules that can realize the on-off function, and their on-time can be determined according to the third message sent by the BMS. The size of L1 and C1 can be set according to actual needs and is not limited in the embodiment of the present application.

[0163] When L1 is storing energy, VT2, VT5, VT7 and VT9 are all closed, and VT3, VT4, VT10 and VT11 are not closed. The current starts from V+, passes through VT2, VT7, L1, VT11, VT5 and K3 in sequence, and returns to V-.

[0164] When C1 is storing energy, VT2, VT5, VT7, VT10 and VT11 are all closed, and VT3, VT4 and VT9 are not closed. The current starts from V+, passes through VT2, VT7, L1, VT9, C1, VT10, VT5 and K3 in sequence, and returns to V-.

[0165] In some embodiments, the first energy storage module 1011 further includes D9 and D11 , D9 is connected to L1 and VT9 , respectively, and D11 is connected to L1 and VT11 , respectively.

[0166] In the embodiment of the present application, by setting two switch modules in the first energy storage module, the charging pile can adjust the conduction state of the two switch modules to achieve switching between the first inductive energy storage and the first capacitive energy storage, giving full play to the complementary advantages of the two energy storage methods and achieving the purpose of battery depolarization and energy recovery.

[0167] In some embodiments, the energy storage module 101 further includes a second energy storage module 1012, such as Figure 5 As shown, where:

[0168] The seventh switch module VT7 and the tenth switch module VT10 are also connected to the second energy storage module 1012;

[0169] When the states of all switch modules in the fifth switch module set are in the closed state and the states of all switch modules in the sixth switch module set are in the open state, energy is continuously stored for the first capacitor C1 through the first inductor L1 and energy is stored for the second inductor L2 in the second energy storage module 1012 through the battery 300. The fifth switch module set includes the third switch module VT3, the fourth switch module VT4 and the tenth switch module VT10, and the sixth switch module set includes the second switch module VT2, the fifth switch module VT5 and the seventh switch module VT7.

[0170] When the states of all switch modules in the seventh switch module set are in a closed state and the states of all switch modules in the eighth switch module set are in an unclosed state, energy is stored for the second capacitor C2 in the second energy storage module 1012 through the second inductor L2. The seventh switch module set includes the third switch module VT3, the fourth switch module VT4, the seventh switch module VT7 and the tenth switch module VT10, and the eighth switch module set includes the second switch module VT2 and the fifth switch module VT5.

[0171] Here, the second energy storage module 1012 can be any suitable circuit capable of achieving this function. In some embodiments, the second energy storage module 1012 can include at least one of at least one switch module, at least one inductor, at least one capacitor, etc. In some embodiments, the second energy storage module 1012 can also include at least one electronic switch.

[0172] During implementation, K2 is disconnected, K3 is closed, VT1 is in an unclosed state, and the battery 300 continues to discharge.

[0173] When VT3, VT4, and VT10 are all closed, and VT2, VT5, and VT7 are not closed, the mode conversion circuit 100 is in the energy storage phase for both C1 and L2. A current originates from V+, passes through VT3, VT10, the second energy storage module 1012, VT4, and K3, and returns to V- to store energy in L2. Since L1 is an inertial element and still has a magnetic field, to recover more energy, a freewheeling circuit is required for L1 to continue boosting C1. At this time, another current originates from L1, passes through VT9 and C1, and returns to L1 to continue storing energy in C1.

[0174] When VT3, VT4, VT7, and VT10 are all closed, and VT2 and VT5 are not closed, the mode conversion circuit 100 is in the C2 energy storage stage. A current starts from V+, passes through VT3, VT10, the second energy storage module 1012, VT7, VT4, and K3, and returns to V- to store energy in C2.

[0175] In the embodiment of the present application, firstly, by arranging two different energy storage modules in the energy storage module, the charging pile can adjust the conduction state of each switch module to switch the two energy storage modules to work alternately, so as to better meet the depolarization requirements of the battery and ensure the continuity and stability of the charging process; secondly, by adjusting the conduction state of each switch module, the charging pile can not only make the battery discharge drive the second inductor to store energy, so as to achieve the purpose of battery depolarization or pulse discharge uniform heat generation, but also make the first inductor continue to store energy for the first capacitor and the battery and the second inductor drive the second capacitor to store and recover energy with a certain current, so as to achieve the purpose of recovering energy during battery depolarization or uniform heat generation, thereby achieving the optimal balance between safety and energy management; finally, the conduction state of each switch module is switched periodically by pulses to control the discharge time of the battery, which greatly improves the uniformity of lithium ion distribution, extends battery life and reduces the risk of thermal runaway.

[0176] In some embodiments, the second energy storage module 1012 further includes a sixth switch module VT6 and an eighth switch module VT8. Figure 6 As shown, where:

[0177] The sixth switch module VT6 is connected to the second inductor L2 and the seventh switch module VT7 respectively;

[0178] an eighth switch module VT8 connected to the second capacitor C2 and the second inductor L2 respectively;

[0179] The second inductor L2 is connected to the tenth switch module VT10 and the sixth switch module VT6 respectively;

[0180] The second capacitor C2 is connected to the eighth switch module VT8 and the tenth switch module VT10 respectively;

[0181] When the state of the sixth switch module VT6 is in the closed state and the state of the eighth switch module VT8 is in the open state, the second inductor L2 stores energy;

[0182] When the state of the sixth switch module VT6 is in an unclosed state and the state of the eighth switch module VT8 is in a closed state, the second capacitor stores energy.

[0183] Here, VT6 and VT8 can be any suitable modules that can realize the on-off function, and their on-time can be determined according to the third message sent by the BMS. The size of L2 and C2 can be set according to actual needs and is not limited in this embodiment of the application.

[0184] When L2 is storing energy, VT3, VT4, VT6, VT9 and VT10 are all closed, and VT2, VT5, VT7, VT8 and VT11 are not closed, a current starts from V+, passes through VT3, VT10, L2, VT6, VT4 and K3 in sequence, and returns to V-.

[0185] When C2 is storing energy, VT3, VT4, VT7, VT8 and VT10 are all closed, and VT2, VT5, VT6, VT9 and VT11 are not closed, a current starts from V+, passes through VT3, VT10, L2, VT8, C2, VT7, VT4 and K3 in sequence, and returns to V-.

[0186] In some embodiments, the second energy storage module 1012 further includes D6 and D8, D6 is connected to VT6 and VT7, respectively, and D8 is connected to L2 and VT8, respectively.

[0187] In the embodiment of the present application, by setting two switch modules in the second energy storage module, the charging pile can adjust the conduction state of the two switch modules to achieve switching between the second inductive energy storage and the second capacitive energy storage, giving full play to the complementary advantages of the two energy storage methods and achieving the purpose of battery depolarization and energy recovery.

[0188] In some embodiments, the energy storage module 101 further includes a third energy storage module 1013, such as Figure 7 As shown, where:

[0189] The third energy storage module 1013 is connected to the first capacitor C1 of the first energy storage module 1011 and the positive terminal X+ of the target storage medium 400 respectively;

[0190] The first capacitor C1 is also connected to the negative terminal X- of the target storage medium 400;

[0191] When all switch modules in the seventh switch module set are in a closed state and all switch modules in the eighth switch module set are in an open state, energy is stored in the third inductor L3 in the third energy storage module 1013 through the first capacitor C1, so as to transfer the energy of the first capacitor C1 to the target storage medium 400;

[0192] When the states of all switch modules in the ninth switch module set are in a closed state and the states of all switch modules in the tenth switch module set are in an unclosed state, energy is stored in the first inductor L1 through the battery 300, energy is continued to be stored in the second capacitor C2 through the second inductor L2, and energy is stored in the target storage medium 400 through the third inductor L3. The ninth switch module set includes the second switch module VT2, the fifth switch module VT5, the seventh switch module VT7, the eighth switch module VT8 in the second energy storage module 1012, and the eleventh switch module VT11 in the first energy storage module 1011. The tenth switch module set includes the third switch module VT3, the fourth switch module VT4, the sixth switch module VT6 in the second energy storage module 1012, the ninth switch module VT9 in the first energy storage module 1011, and the tenth switch module VT10.

[0193] Here, the third energy storage module 1013 can be any suitable circuit capable of achieving this function. In some embodiments, the third energy storage module 1013 can include at least one of at least one switch module, at least one inductor, at least one capacitor, etc. In some embodiments, the third energy storage module 1013 can also include at least one electronic switch.

[0194] In some embodiments, the third energy storage module 1013 may include a twelfth switch module VT12 and L3, wherein:

[0195] VT12 is connected to C1 and L3 respectively;

[0196] L3 is connected to the positive terminal X+ of the target energy storage medium 400 and VT12 respectively.

[0197] In some embodiments, the third energy storage module 1013 may further include D3 and D12. Figure 8 As shown, where:

[0198] D3 is connected to the positive terminal X+ and L3 of the target energy storage medium 400 respectively;

[0199] L3 is connected to D3 and VT12 respectively;

[0200] VT12 is connected to L3 and C1 respectively;

[0201] C1 is connected to the negative terminal X- of VT12 and the target energy storage medium 400 respectively;

[0202] D12 is connected to L3 and the negative terminal X− of the target energy storage medium 400 , respectively.

[0203] During implementation, K2 is disconnected, K3 is closed, VT1 is in an unclosed state, and the battery 300 continues to discharge.

[0204] When VT3, VT4, VT7, VT8, VT10, and VT12 are all closed, and VT2, VT5, VT6, VT9, and VT11 are all open, the mode conversion circuit 100 is in the C2 and L3 energy storage phase. One current originates from V+, passes through VT3, VT10, L2, VT8, C2, VT7, VT4, and K3, and returns to V-, storing energy in C2. Another current originates from the negative terminal X- of the target storage medium 400, passes through C1, VT12, L3, and D3, and returns to the positive terminal X+ of the target storage medium 400, storing energy in L3.

[0205] When VT2, VT5, VT7, VT8, and VT11 are all closed, and VT3, VT4, VT6, VT9, VT10, and VT12 are all open, the mode conversion circuit 100 is in the energy storage phase of L1, C2, and the target storage medium 400. The first current originates from V+, passes through VT2, VT7, L1, VT11, VT5, and K3, and returns to V-, thereby storing energy in L1. The second current originates from L2, passes through VT8 and C2, and returns to L2, thereby storing energy in C2. The third current originates from the negative terminal X- of the target storage medium 400, passes through D12, L3, and D3, and returns to the positive terminal X+ of the target storage medium 400, thereby storing energy in the target storage medium 400.

[0206] In the embodiment of the present application, by further providing a third energy storage module in the energy storage module, the charging pile can transfer the energy in the first capacitor to the long-term energy storage medium by adjusting the conduction state of each switch module, so as to ensure the normal alternating operation of the first energy storage module and the second energy storage module, thereby better meeting the depolarization requirements of the battery and ensuring the continuity and stability of the charging process.

[0207] In some embodiments, the energy storage module 101 further includes a fourth energy storage module 1014, such as Figure 9 As shown, where:

[0208] The fourth energy storage module 1014 is connected to the second capacitor C2 of the second energy storage module 1012 and the positive terminal X+ of the target storage medium 400 respectively;

[0209] The second capacitor C2 is also connected to the negative terminal X- of the target storage medium 400;

[0210] When the states of all switch modules in the eleventh switch module set are in a closed state and the states of all switch modules in the twelfth switch module set are in an unclosed state, energy is stored in the first capacitor C1 through the battery 300, and energy is stored in the fourth inductor L4 in the fourth energy storage module 1014 through the second capacitor C2, so as to transfer the energy of the second capacitor C2 to the target storage medium 400. The eleventh switch module set includes the second switch module VT2, the fifth switch module VT5, the seventh switch module VT7, the ninth switch module VT9 and the tenth switch module VT10 in the first energy storage module 1011, and the twelfth switch module set includes the third switch module VT3, the fourth switch module VT4, the sixth switch module VT6 in the second energy storage module 1012, the eighth switch module VT8 in the second energy storage module 1012, and the eleventh switch module VT11 in the first energy storage module 1011.

[0211] When the states of all switch modules in the thirteenth switch module set are in a closed state and the states of all switch modules in the fourteenth switch module set are in an unclosed state, energy is continued to be stored for the first capacitor C1 through the first inductor L1, energy is stored for the second inductor L2 through the battery 300, and energy is stored for the target storage medium 400 through the fourth inductor L4. The thirteenth switch module set includes the third switch module VT3, the fourth switch module VT4, the sixth switch module VT6 in the second energy storage module 1012, the ninth switch module VT9 and the tenth switch module VT10 in the first energy storage module 1011, and the fourteenth switch module set includes the second switch module VT2, the fifth switch module VT5, the seventh switch module VT7, the eighth switch module VT8 in the second energy storage module 1012, the eleventh switch module VT11 in the first energy storage module 1011, the twelfth switch module VT12 in the third energy storage module 1013, and the thirteenth switch module VT13 in the fourth energy storage module 1014.

[0212] Here, the fourth energy storage module 1014 can be any suitable circuit capable of achieving this function. In some embodiments, the fourth energy storage module 1014 can include at least one of at least one switch module, at least one inductor, at least one capacitor, etc. In some embodiments, the fourth energy storage module 1014 can also include at least one electronic switch.

[0213] In some embodiments, the fourth energy storage module 1014 may include a thirteenth switch module VT13 and L4, wherein:

[0214] VT13 is connected to C2 and L4 respectively;

[0215] L4 is connected to the positive terminal X+ of the target energy storage medium 400 and VT13 respectively.

[0216] In some embodiments, the fourth energy storage module 1014 may further include D4 and D13. Figure 10 As shown, where:

[0217] D4 is connected to the positive terminal X+ and L4 of the target energy storage medium 400 respectively;

[0218] L4 is connected to D4 and VT13 respectively;

[0219] VT13 is connected to L4 and C2 respectively;

[0220] C2 is connected to the negative terminal X- of VT13 and the target energy storage medium 400 respectively;

[0221] D13 is connected to L4 and the negative terminal X− of the target energy storage medium 400 , respectively.

[0222] During implementation, K2 is disconnected, K3 is closed, VT1 is in an unclosed state, and the battery 300 continues to discharge.

[0223] When VT2, VT5, VT7, VT9, VT10, and VT13 are all closed, and VT3, VT4, VT6, VT8, and VT11 are not closed, the mode conversion circuit 100 is in the energy storage phase of C1 and L4. One current originates from V+, passes through VT2, VT7, L1, VT9, C1, VT10, VT5, and K3, and returns to V-, storing energy in C1. Another current originates from the negative terminal X- of the target storage medium 400, passes through C2, VT13, L4, and D4, and returns to the positive terminal X+ of the target storage medium 400, storing energy in L4.

[0224] When VT3, VT4, VT6, VT9, and VT10 are all closed, and VT2, VT5, VT7, VT8, VT11, VT12, and VT13 are all open, the mode conversion circuit 100 is in the energy storage phase involving C1, L2, and the target storage medium 400. The first current originates from V+, passes through VT3, VT10, L2, VT6, VT4, and K3, and returns to V-, storing energy in L2. Since L1 is an inertial element and still maintains a magnetic field, a freewheeling circuit is required to continue boosting C1 to recover more energy. At this point, the second current originates from L1, passes through VT9 and C1, and returns to L1, continuing to store energy in C1. The third current originates from the negative terminal X- of the target storage medium 400, passes through D13, L4, and D4, and returns to the positive terminal X+ of the target storage medium 400, storing energy in the target storage medium 400.

[0225] In the embodiment of the present application, on the one hand, by further providing a fourth energy storage module in the energy storage module, the charging pile can transfer the energy in the second capacitor to the long-term energy storage medium by adjusting the conduction state of each switch module, so as to ensure the normal alternating operation of the first energy storage module and the second energy storage module, thereby better meeting the depolarization requirements of the battery and ensuring the continuity and stability of the charging process; on the other hand, by releasing energy to the same energy storage medium through the first capacitor and the second capacitor, the energy storage cost is reduced.

[0226] In some embodiments, the mode conversion circuit 100 further includes a pre-charge switch K1, a pre-charge resistor R1 and a bus capacitor C3. Figure 11 As shown, where:

[0227] The pre-charge switch K1 and the pre-charge resistor R1 are connected to the positive terminal A+ of the charging pile 200 and the mode switching switch K2 respectively;

[0228] The bus capacitor C3 is connected to the pre-charge switch K1 and the negative terminal A- of the charging pile 200 respectively;

[0229] When the pre-charging switch K1 is not closed, the mode conversion circuit 100 enters the pre-charging mode to pre-charge the bus capacitor C3 through the charging pile 200 .

[0230] Here, the pre-charge switch K1 may be any suitable switch capable of achieving this function, such as a relay switch, a diode, a transistor, an IGBT, etc. In some embodiments, the pre-charge switch K1 may be a relay switch.

[0231] The size of the pre-charging resistor R1 can be any appropriate resistance value. During implementation, those skilled in the art can independently set the size of R1 according to actual needs, and the embodiment of the present application does not limit this.

[0232] The size of the bus capacitor C3 can be any suitable capacitor. During implementation, those skilled in the art can independently set the size of C3 according to actual needs, and the embodiment of the present application does not limit it.

[0233] When the mode conversion circuit 100 enters the DC charging mode, it first performs pre-charging and then performs DC charging on the battery 300, that is, it first disconnects K1 to enter the pre-charging mode, and then closes K1 when C3 is fully charged.

[0234] After the mode conversion circuit 100 enters the pulse heating mode or the pulse charging mode, if it enters the charging stage for the first time (or the first stage, that is, the charging pile 200 performs pulse charging on the battery 300), K1 is first disconnected to enter the pre-charging mode. When C3 is in a full state, K1 is closed again, and the subsequent second stage (that is, energy storage of L1), third stage (that is, energy storage of C1), fourth stage (energy storage of C1 and L2), fifth stage (that is, energy storage of C2 and L3), sixth stage (that is, energy storage of L1, C2 and the target storage medium 400), seventh stage (that is, energy storage of C1 and L4), eighth stage (that is, energy storage of C1, L2 and the target storage medium 400), first stage, second stage... are sequentially entered into a cycle until charging is completed.

[0235] In the embodiment of the present application, before heating or charging the battery, the charging pile pre-charges the bus capacitor through a pre-charging resistor to slowly establish a voltage gradient using the pre-charging resistor, which not only avoids the generation of instantaneous large current during direct conduction and protects various components in the circuit from stress damage, but also makes the voltage of the bus capacitor gradually approach the battery terminal voltage, so as to reduce the voltage difference when the main negative relay is closed to a safe range, extend the life of various components, and achieve the purpose of hardware protection and safety enhancement.

[0236] Figure 12 A schematic diagram of a circuit structure of a mode conversion circuit provided in an embodiment of the present application is shown in FIG. Figure 12 As shown, the mode conversion circuit 100 includes K1, K2, K3, R1, VT1-VT13, L1-L4, C1-C3, D1, D3, D4 and D6-D13, wherein:

[0237] 1) For DC charging mode

[0238] When VT1 to VT13 are not closed, and K1, K2, and K3 are all closed, the positive terminal A+ of the charging pile 200 is connected to the positive terminal V+ of the battery 300, and the negative terminal A- of the charging pile 200 is connected to the negative terminal V- of the battery 300. The current starts from A+, passes through K1, K2, V+, V-, and K3 in sequence, and then returns to A-. Figure 13 Before performing DC charging, K1 can be disconnected, causing the mode conversion circuit 100 to enter pre-charging mode, allowing the charging station 200 to pre-charge C3. At this time, the current starts from A+, passes through R1 and C3 in sequence, and finally returns to A-. When C3 is fully charged, K1 is closed again, allowing the charging station 200 to perform DC charging on the battery 300.

[0239] 2) For pulse charging mode or pulse heating mode, there are eight stages (i.e., stage 1 to stage 8)

[0240] (1) Phase 1

[0241] When K1 is closed, K2 is open, K3 is closed, VT1 is closed, and VT2 to VT13 are not closed, the charging pile 200 performs pulse charging on the battery 300. The current starts from A+ and passes through K1, D1, VT1, V+, V- and K3 in sequence before returning to A-. Figure 14 When entering the first stage for the first time, K1 can be disconnected, causing the mode conversion circuit 100 to enter the pre-charge mode, so that C3 can be pre-charged through the charging pile 200. At this time, the current starts from A+, passes through R1 and C3 in sequence, and finally returns to A-. When C3 is fully charged, K1 is closed again, causing the charging pile 200 to pulse charge the battery 300.

[0242] (2) Second stage

[0243] When K1 is disconnected, K2 is disconnected, K3 is closed, VT1 is not closed, VT2 is closed, VT3 is not closed, VT4 is not closed, VT5 is closed, VT6 is not closed, VT7 is closed, VT8 is not closed, VT9 is not closed, VT10 is not closed, VT11 is closed, VT12 is not closed, and VT13 is not closed, the mode conversion circuit 100 is in the L1 energy storage stage. The current starts from V+ and passes through VT2, VT7, L1, D11, VT11, VT5 and K3 in sequence before returning to V-. Figure 15 As shown, the discharge of battery 300 drives L1 to store energy, and the loop current increases exponentially, thereby achieving the purpose of depolarization of battery 300 or uniform heat generation.

[0244] (3) The third stage

[0245] When K1 is disconnected, K2 is disconnected, K3 is closed, VT1 is not closed, VT2 is closed, VT3 is not closed, VT4 is not closed, VT5 is closed, VT6 is not closed, VT7 is closed, VT8 is not closed, VT9 is closed, VT10 is closed, VT11 is not closed, VT12 is not closed, and VT13 is not closed, the mode conversion circuit 100 is in the C1 energy storage stage. The current starts from V+ and passes through VT2, VT7, L1, D9, VT9, C1, D10, VT10, VT5 and K3 in sequence before returning to V-. Figure 16 The battery 300 and L1 drive C1 to store and recover energy with a certain current, so as to achieve the purpose of recovering and storing energy during the depolarization or uniform heat generation process of the battery 300.

[0246] (4) The fourth stage

[0247] When K1 is disconnected, K2 is disconnected, K3 is closed, VT1 is not closed, VT2 is not closed, VT3 is closed, VT4 is closed, VT5 is not closed, VT6 is closed, VT7 is not closed, VT8 is not closed, VT9 is closed, VT10 is closed, VT11 is not closed, VT12 is not closed, and VT13 is not closed, the mode conversion circuit 100 is in the energy storage stage of C1 and L2, such as Figure 17 As shown in the figure, one current originates from V+, passes through VT3, VT10, L2, VT6, D6, VT4, and K3, and returns to V-, storing energy in L2. Another current originates from L1, passes through D9, VT9, C1, and D7, and returns to L1, continuing to store energy in C1. Because L1 is an inertial component and still has a magnetic field, it is necessary to provide a freewheeling circuit for L1 to continue boosting C1 in order to recover more energy.

[0248] (5) Fifth stage

[0249] When K1 is disconnected, K2 is disconnected, K3 is closed, VT1 is not closed, VT2 is not closed, VT3 is closed, VT4 is closed, VT5 is not closed, VT6 is not closed, VT7 is closed, VT8 is closed, VT9 is not closed, VT10 is closed, VT11 is not closed, VT12 is closed, and VT13 is not closed, the mode conversion circuit 100 is in the energy storage stage of C2 and L3, such as Figure 18 As shown in Figure 1, one current originates from V+, passes through VT3, VT10, L2, D8, VT8, C2, D7, VT7, VT4, and K3, and returns to V-, storing energy in C2. Another current originates from the negative terminal X- of the target storage medium 400, passes through C1, VT12, L3, and D3, and returns to the positive terminal X+ of the target storage medium 400, storing energy in L3. After C1 is boosted, the energy in C1 needs to be transferred to the target storage medium 400 to ensure normal alternating operation between the first energy storage module 1011 and the second energy storage module 1012.

[0250] (6) Sixth stage

[0251] When K1 is disconnected, K2 is disconnected, K3 is closed, VT1 is not closed, VT2, VT3 are not closed, VT4 is not closed, VT5, VT6 are not closed, VT7, VT8, VT9 are not closed, VT10 is not closed, VT11, VT12 are not closed, and VT13 is not closed, the mode conversion circuit 100 is in the energy storage stage of L1, C2 and the target energy storage medium 400, as shown in FIG. Figure 19As shown in Figure 1, the first current originates from V+ and passes through VT2, VT7, L1, D11, VT11, VT5, and K3, before returning to V- to store energy in L1. The second current originates from L2 and passes through D8, VT8, C2, and D10, before returning to L2 to store energy in C2. This is because L2 still has a magnetic field. Considering the characteristics of capacitor elements, the freewheeling circuit of the second energy storage module 1012 continuously increases the voltage of C2 to achieve energy recovery. The third current originates from the negative terminal X- of the target storage medium 400, passes through D12, L3, and D3, and returns to the positive terminal X+ of the target storage medium 400 to store energy in the target storage medium 400. Although the first energy storage module 1011 and the second energy storage module 1012 need to operate alternately, VT12 does not need to be disconnected immediately after the C2 energy storage phase ends. It only needs to be disconnected before the C1 energy storage phase (when C2 discharges into the target storage medium 400) begins. After VT12 is disconnected, the third energy storage module 1013 will enter the boost phase, and L3 will continue to boost and charge the target storage medium 400, thereby achieving maximum energy recovery.

[0252] (7) Seventh Stage

[0253] When K1 is disconnected, K2 is disconnected, K3 is closed, VT1 is not closed, VT2 is closed, VT3 is not closed, VT4 is not closed, VT5 is closed, VT6 is not closed, VT7 is closed, VT8 is not closed, VT9 is closed, VT10 is closed, VT11 is not closed, VT12 is not closed, and VT13 is closed, the mode conversion circuit 100 is in the energy storage stage of C1 and L4, such as Figure 20 As shown in Figure 1. One current originates from V+, passes through VT2, VT7, L1, D9, VT9, C1, D10, VT10, VT5, and K3, and returns to V-, storing energy in C1. Another current originates from the negative terminal X- of the target storage medium 400, passes through C2, VT13, L4, and D4, and returns to the positive terminal X+ of the target storage medium 400, storing energy in L4.

[0254] (8) Stage 8

[0255] When K1 is disconnected, K2 is disconnected, K3 is closed, VT1 is not closed, VT2 is not closed, VT3 is closed, VT4 is closed, VT5 is not closed, VT6 is closed, VT7 is not closed, VT8 is not closed, VT9 is closed, VT10 is closed, VT11 is not closed, VT12 is not closed, and VT13 is not closed, the mode conversion circuit 100 is in the energy storage stage of C1, L2, and the target energy storage medium 400, as shown in FIG. Figure 21As shown in the figure. The first current originates from V+, passes through VT3, VT10, L2, VT6, D6, VT4, and K3, and returns to V-, thus storing energy in L2. The second current originates from L1, passes through D9, VT9, C1, and D7, and returns to L1, thus further boosting the voltage of C1. The third current originates from the negative terminal X- of the target storage medium 400, passes through D13, L4, and D4, and returns to the positive terminal X+ of the target storage medium 400, thus storing energy in the target storage medium 400.

[0256] Table 1 below shows the working states of the first energy storage module 1011, the second energy storage module 1012, the third energy storage module 1013, and the fourth energy storage module 1014 in various stages, wherein:

[0257] Table 1 Working status of the four energy storage modules in each stage

[0258]

[0259] In the pulse heating mode or the pulse charging mode, the mode conversion circuit 100 performs pulse charging or pulse heating on the battery 300 by cyclically executing the eight stages.

[0260] In the embodiment of the present application, a mode conversion circuit is integrated at the charging pile end, and a mode switching switch and a main negative relay switch are used to dynamically switch the working mode of the mode conversion circuit. On the basis of supporting the charging pile to perform DC charging of the battery, it also supports the coupling of pulse charging, pulse discharging and energy recovery through the energy interaction module to heat the battery or pulse charge. Therefore, firstly, the energy interaction module quickly heats the battery through pulse charging and discharging, without considering the hardware differences between different models, thereby improving the heating speed and heating uniformity, and reducing the possibility of shortened life and thermal runaway due to uneven heating, thereby greatly extending the battery life and reducing operation and maintenance costs. At the same time, Because there is no need to add additional heating devices to each vehicle, the cost of the entire vehicle is reduced; secondly, during the heating process, the battery can be discharged through the energy interaction module, eliminating the inconsistency of the charge state distribution and lithium ion concentration distribution in the thickness direction of the battery, reducing the risk of lithium plating while ensuring the charging speed, greatly improving the polarization phenomenon under high charge state and ensuring the capacity retention rate; thirdly, the energy interaction module can also recover the energy released by depolarization, improving charging efficiency and safety while avoiding energy waste; finally, the same energy interaction module can realize heating, charging, discharging and energy recovery functions, effectively reducing the size of the charging pile and saving hardware costs. In addition, the negative terminal of the charging pile and the negative terminal of the battery are connected through the main negative relay switch, which not only realizes the automatic on-off control of the circuit, but also effectively protects the circuit from damage caused by reverse current.

[0261] Based on the above embodiment, the present application also provides a charging pile. Figure 22 A schematic diagram of the structure of a charging pile provided in an embodiment of the present application is shown in FIG. Figure 22 As shown, the charging pile 200 includes a mode conversion unit 210 and a control unit 220. The mode conversion unit 210 includes any of the above-mentioned mode conversion circuits 100, wherein:

[0262] The control unit 220 is connected to the mode conversion unit 210 and is used to control the mode conversion circuit 100 to enter the target operating mode based on the second message sent by the vehicle's battery management system; the target operating mode includes a DC charging mode, a pulse heating mode or a pulse charging mode.

[0263] Here, the control unit 220 may be any suitable unit capable of implementing this function, such as a microcontroller unit (MCU) or a central processing unit (CPU). The operating modes of the mode conversion circuit 100 may include, but are not limited to, a DC charging mode, a pulse heating mode, and a pulse charging mode.

[0264] The second message may carry an operating mode, a second indication information, etc. The second indication information may be any suitable information that can indicate an operating mode. During implementation, the control unit 220 may determine the target operating mode by parsing the second message. In some embodiments, the charging pile 200 may also pre-set multiple operating modes, and determine an adapted operating mode from the multiple operating modes based on the second indication information in the second message. In some embodiments, a correspondence between each second indication information and each operating mode may be established in advance, and based on the correspondence, the operating mode adapted to the second indication information may be determined.

[0265] In some embodiments, the control unit 220 is also used for at least one of the following: based on a first message sent by the battery management system, controlling the mode conversion circuit 100 to enter a constant voltage charging mode or a constant current charging mode, so that the mode conversion circuit 100 performs DC charging for the battery according to the target voltage or target current; based on a third message sent by the battery management system, switching the current direction of the mode conversion circuit 100 within the target cycle to perform pulse charging and pulse discharging on the battery 300.

[0266] Here, after determining that the operating mode of the mode conversion circuit 100 is the DC charging mode, the first message sent by the BMS further determines whether to enter the constant voltage charging mode or the constant current charging mode. The first message may carry DC charging parameters, first indication information, etc. The first indication information can be any suitable information that can indicate the DC charging parameters. DC charging parameters may include, but are not limited to, the DC charging mode type, voltage value, current value, charging duration, etc. In implementation, the control unit 200 parses the first message to determine the DC charging mode type and target voltage / target current. It is understood that when the DC charging mode is the constant voltage charging mode, the first message may also carry the target voltage; when the DC charging mode is the constant current charging mode, the first message may also carry the target current. In some embodiments, the charging station 200 may pre-set multiple DC charging parameters and determine the appropriate DC charging parameters from the multiple DC charging parameters based on the first indication information in the first message. In implementation, the control unit 220 controls the mode conversion circuit 100 to perform DC charging for the battery 300. For details on the mode conversion circuit embodiment described above, please refer to the detailed implementation of the mode conversion circuit embodiment.

[0267] The target cycle can be any suitable cycle. After determining that the operating mode of the mode conversion circuit 100 is pulse charging mode or pulse heating mode, the charge and discharge parameters are further determined based on the third message sent by the BMS. The third message can carry charge and discharge parameters, third indication information, etc. The third indication information can be any suitable information that can indicate the charge and discharge parameters. The charge and discharge parameters may include but are not limited to charge and discharge current, charge and discharge frequency f, charge and discharge duty cycle D, etc. In some embodiments, the battery 300 can also be pulse heated or pulse charged according to default charge and discharge parameters. In some embodiments, the charging pile 200 can pre-set multiple charge and discharge parameters and determine the appropriate charge and discharge parameters from the multiple charge and discharge parameters based on the third indication information in the third message. In implementation, the main difference between the pulse charging mode and the pulse heating mode is the charging time. The pulse heating mode is based on the resistance characteristics of the battery to generate Joule heat in each battery. Generally, the pulse heating mode has a shorter charging duration, while the pulse charging mode can specifically configure the charging time based on the charge and discharge parameters sent by the BMS. It is understood that both the pulse heating mode and the pulse charging mode include multiple phases, and throughout the entire process, the mode conversion circuit 100 will enter pulse charging, pulse discharging, and energy recovery. In implementation, the control unit 220 controls the mode conversion circuit 100 to perform pulse heating or pulse charging on the battery 300. For details, please refer to the specific implementation of the mode conversion circuit embodiment described above.

[0268] In the implementation mode of the present application, on the one hand, first, the constant voltage charging mode or constant current charging mode is dynamically determined through the interactive message between the BMS and the charging pile. Since no additional hardware circuit is required, the hardware complexity and failure rate are reduced, and the decoupling of the battery management algorithm and the charging pile execution layer is realized, thereby achieving the purpose of optimal energy management and equipment protection; secondly, the charging pile can charge the battery pack with constant voltage or constant current by adjusting the switching state of the mode switching switch and the main negative relay switch, thereby realizing customized charging management of the battery, reducing polarization effect and lithium plating risk, and achieving the purpose of adapting to battery characteristic requirements; finally, during the charging process, the BMS can dynamically adjust the interactive message according to the battery's state of charge to achieve intelligent switching between constant voltage mode and constant current mode, and / or dynamic configuration of constant voltage parameters or constant current parameters, thereby improving charging efficiency and safety while extending battery life. On the other hand, the working mode of the mode conversion circuit is switched through interactive messages between the BMS and the charging pile, so that the charging pile can periodically adjust parameters such as the charging and discharging current and charging and discharging time. This not only improves the rationality, flexibility and intelligence of battery charging, but also improves charging safety while ensuring charging efficiency, thereby greatly extending battery life.

[0269] In some embodiments, the control unit 220 is further used to: determine the on-time of the first switch module VT1 in the energy interaction module 10 based on the third message; during the on-time of the first switch module VT1, control the state of the first switch module VT1 to be in a closed state, so as to perform pulse charging for the battery 300 through the charging pile 200; outside the on-time of the first switch module VT1, control the state of the first switch module VT1 to be in an unclosed state, and control the energy storage module 101 in the energy interaction module 10 to perform pulse charging, pulse discharging and energy recovery between the charging pile 200 and the battery 300.

[0270] Here, the third message may carry charge and discharge parameters, third indication information, etc. The third indication information may be any suitable information capable of indicating the charge and discharge parameters. The charge and discharge parameters may include, but are not limited to, charge and discharge current, charge and discharge frequency f, and charge and discharge duty cycle D. It is understood that the charge and discharge current includes the charge current and discharge current, the charge and discharge frequency includes the charge frequency and discharge frequency, and the charge and discharge duty cycle includes the charge duty cycle and the discharge duty cycle.

[0271] In some embodiments, the on-time of VT1 can be determined based on the charging frequency and the charging duty cycle. Methods for determining the on-time of VT1 may include, but are not limited to, a first product, a weighted version of the first product, and the like. The first product is the product of a first ratio and a second ratio. The first ratio refers to the ratio between a first preset value and the charging frequency, and the first preset value can be any suitable value, such as 1. The second ratio refers to the ratio between the charging duty cycle and the second preset value, and the second preset value can be any suitable value, such as 100.

[0272] In some embodiments, the on-time T1 of VT1 can be determined by the following formula (2-1), where:

[0273] (2-1);

[0274] in, is the charging frequency, is the first preset value, is the second preset value, is the charging duty cycle.

[0275] During implementation, when VT1 is closed (i.e., when VT1 is conducting), the first stage begins, pulse charging the battery 300. When VT1 is not closed (i.e., when VT1 is disconnected), the second to eighth stages begin, discharging the battery 300. During the entire discharge process, the energy storage module 101 cycles through pulse charging, pulse discharging, and energy recovery. For implementation, please refer to the detailed implementation of the aforementioned mode conversion circuit embodiment.

[0276] In the implementation manner of the present application, on the one hand, by setting the first switch module, during the charging process, the charging pile can adjust the conduction state of the first switch module, not only to perform pulse charging for the battery, but also to discharge the battery and recover the energy released by depolarization through the charging, discharging and energy recovery of the energy storage module, thereby achieving an optimized balance between charging efficiency, safety and energy management; on the other hand, the conduction time of the first switch module is dynamically determined through the interactive message between the BMS and the charging pile to adapt to the charging requirements of different BMSs, thereby improving the accuracy and flexibility of the conduction time, thereby reducing the fluctuation of voltage or current during the charging process.

[0277] In some embodiments, the control unit 220 is further configured to: within a target time period, control the states of all switch modules in the first target switch module set to be in a closed state and the states of all switch modules in the second target switch module set to be in an unclosed state, so as to store energy for the target object of the energy storage module 101; wherein the target time period is determined based on the third message, and the target time period includes at least one of the following: a first time period, a second time period, a third time period, a fourth time period, a fifth time period, a sixth time period, and a seventh time period; when the target time period is the first time period, the first target switch module set includes the first switch module set, the second target switch module set includes the second switch module set, and the target object includes the first inductor L1 in the first energy storage module 1011 of the energy storage module 101; when the target time period is the second time period, the first target switch module set includes the third switch module set, the second target switch module set includes the fourth switch module set, and the target object includes the first capacitor C1 in the first energy storage module 1011; when the target time period is the third time period, the first target switch module set includes the fifth switch module set, the second target switch module set includes the sixth switch module set, and the target object includes The first capacitor C1 and the second inductor L2 in the second energy storage module 1012 of the energy storage module 101; when the target time period is the fourth time period, the first target switch module set includes the seventh switch module set, the second target switch module set includes the eighth switch module set, and the target object includes the second capacitor C2 in the second energy storage module 1012 and the third inductor L3 in the third energy storage module 1013 of the energy storage module 101; when the target time period is the fifth time period, the first target switch module set includes the ninth switch module set, the second target switch module set includes the tenth switch module set, and the target object includes the first capacitor C1 and the second inductor L2 in the second energy storage module 1012 of the energy storage module 101; inductor L1, second capacitor C2 and target storage medium 400; when the target time period is the sixth time period, the first target switch module set includes the eleventh switch module set, the second target switch module set includes the twelfth switch module set, and the target object includes the first capacitor C1 and the fourth inductor L4 in the fourth energy storage module 1014 of the energy storage module 101; when the target time period is the seventh time period, the first target switch module set includes the thirteenth switch module set, the second target switch module set includes the fourteenth switch module set, and the target object includes the first capacitor C1, the second inductor L2 and the target storage medium 400.

[0278] Here, after the first stage is completed, that is, after the pulse charging of the battery 300 is completed, the subsequent second to eighth stages are entered in sequence to complete the discharge of the battery 300, and then the first to eighth stages are entered again..., and this cycle is repeated until the battery 300 completes the pulse charging or pulse heating.

[0279] The first time period refers to the operating time of the first energy storage module 1011 during the second phase. The second time period refers to the operating time of the first energy storage module 1011 during the third phase. The third time period refers to the combined operating time of the first energy storage module 1011 and the second energy storage module 1012 during the fourth phase. The fourth time period refers to the combined operating time of the second energy storage module 1012 and the third energy storage module 1013 during the fifth phase. The fifth time period refers to the combined operating time of the first energy storage module 1011, the second energy storage module 1012, and the third energy storage module 1013 during the sixth phase. The sixth time period refers to the combined operating time of the first energy storage module 1011 and the fourth energy storage module 1014 during the seventh phase. The seventh time period refers to the combined operating time of the first energy storage module 1011, the second energy storage module 1012, and the fourth energy storage module 1014 during the eighth phase. In some embodiments, the first, third, and fifth time periods may be the same, and the second, fourth, and sixth time periods may be the same.

[0280] The third message may carry charge and discharge parameters, third indication information, etc. The third indication information may be any suitable information that can indicate the charge and discharge parameters. The charge and discharge parameters may include but are not limited to charge and discharge current, charge and discharge frequency f, charge and discharge duty cycle D, etc.

[0281] In some embodiments, the first time period can be determined based on the discharge frequency and the discharge duty cycle. Methods for determining the first time period may include, but are not limited to, a third product, a weighted version of the third product, and the like. The third product is the product of the third ratio and the fourth ratio. The third ratio refers to the ratio between the third preset value and the discharge frequency. The third preset value can be any suitable value, such as 1. In some embodiments, the third preset value can be the same as the first preset value. The fourth ratio refers to the ratio between the discharge duty cycle and the fourth preset value. The fourth preset value can be any suitable value, such as 100. In some embodiments, the fourth preset value can be the same as the second preset value.

[0282] In some embodiments, the first time period TS1 may be determined by the following formula (2-2), where:

[0283] (2-2);

[0284] in, is the discharge frequency, is the third preset value, is the fourth preset value, is the discharge duty cycle.

[0285] In some embodiments, the second time period can be determined based on the discharge frequency and the discharge duty cycle. The method for determining the second time period may include, but is not limited to, a fourth product, a weighted fourth product, etc. The fourth product is the product between the fifth ratio and the first difference. The fifth ratio refers to the ratio between the fifth preset value and the discharge frequency. The fifth preset value can be any suitable value, for example, 1. In some embodiments, the fifth preset value can also be the same as the first preset value. The first difference can be the difference between the sixth preset value and the sixth ratio. The sixth preset value can be any suitable value, for example, 1. The sixth ratio refers to the ratio between the discharge duty cycle and the seventh preset value. The seventh preset value can be any suitable value, for example, 100. In some embodiments, the seventh preset value can also be the same as the second preset value.

[0286] In some embodiments, the second time period TS2 may be determined by the following formula (2-3), where:

[0287] (2-3);

[0288] in, is the discharge frequency, is the fifth preset value, is the sixth preset value, is the fourth preset value, is the discharge duty cycle.

[0289] During implementation, the states of the various switch modules are controlled according to the time period corresponding to each stage to store energy for each target object. For details, please refer to the specific implementation of the aforementioned mode conversion circuit embodiment.

[0290] In the implementation manner of the present application, on the one hand, the on-time of each switch module is dynamically determined through interactive messages between the BMS and the charging pile to adapt to the charging requirements of different stages, thereby improving the accuracy and flexibility of the on-time; on the other hand, by setting multiple switch modules in the energy storage module, the charging pile can adjust the on-state of each switch module to achieve energy storage of the inductor, energy storage of the capacitor and / or energy storage of the target storage medium in different time periods, thereby not only achieving the purpose of uniform heat generation during battery depolarization or pulse discharge, but also achieving the purpose of energy recovery during battery depolarization or uniform heat generation, thereby achieving the optimal balance between safety and energy management; on the other hand, by setting multiple energy storage modules, not only can the depolarization requirements of the battery be better met, ensuring the continuity and stability of the charging process, but also the energy in each capacitor can be transferred to the same long-term energy storage medium to ensure the normal alternating operation of each energy storage module, thereby reducing the energy storage cost.

[0291] Figure 23A schematic diagram of various time periods within a target cycle is provided in an embodiment of the present application, such as Figure 23 As shown, where:

[0292] t1 refers to the time period corresponding to the first stage, that is, the conduction time of VT1;

[0293] t2 refers to the time period corresponding to the second stage;

[0294] t3 refers to the time period corresponding to the third stage;

[0295] t4 refers to the time period corresponding to the fourth stage;

[0296] t5 refers to the time period corresponding to the fifth stage;

[0297] t6 refers to the time period corresponding to the sixth stage;

[0298] t7 refers to the time period corresponding to the seventh stage;

[0299] t8 refers to the time period corresponding to the eighth stage.

[0300] In the embodiment of the present application, on the one hand, the target working mode of the mode conversion circuit is dynamically determined through the interactive messages between the battery management system and the charging pile, thereby realizing dynamic regulation of the charging mode and better meeting the charging needs of different vehicles; on the other hand, by integrating the mode conversion circuit at the charging pile end, the mode switching switch and the main negative relay switch are used to dynamically switch the working mode of the mode conversion circuit. On the basis of supporting the charging pile to perform DC charging of the battery, it also supports the coupling of pulse charging, pulse discharge and energy recovery through the energy interaction module to heat or pulse charge the battery. Therefore, firstly, the energy interaction module quickly heats the battery through pulse charging and discharging, without considering the hardware differences between different models, thereby improving the heating speed and heating uniformity, and reducing the heating caused by uneven heating. The possibility of shortened life and thermal runaway is reduced, thereby greatly extending the battery life and reducing operation and maintenance costs. At the same time, since there is no need to add additional heating devices to each vehicle, the cost of the entire vehicle is reduced; secondly, during the heating process, the battery can be discharged through the energy interaction module, eliminating the inconsistency of the charge state distribution and lithium ion concentration distribution in the thickness direction of the battery, reducing the risk of lithium plating while ensuring the charging speed, greatly improving the polarization phenomenon under high charge state and ensuring the capacity retention rate; thirdly, the energy interaction module can also recover the energy released by depolarization, avoiding energy waste while improving charging efficiency and safety; finally, the same energy interaction module can realize functions such as heating, charging, discharging and energy recovery, effectively reducing the volume of the charging pile and saving hardware costs.

[0301] Based on the above embodiments, the present application further provides a battery control method. The method provided in the embodiments of the present application can be executed by an electronic device. The electronic device can be various types of terminals such as laptop computers, tablet computers, desktop computers, vehicle terminals, set-top boxes, mobile devices (for example, mobile phones, portable music players, personal digital assistants, dedicated messaging devices, portable gaming devices), etc., and can also be implemented as a server. The server can be an independent physical server, or a server cluster or distributed system composed of multiple physical servers. It can also be a cloud server that provides basic cloud computing services such as cloud services, cloud databases, cloud computing, cloud functions, cloud storage, network services, cloud communications, middleware services, domain name services, security services, content delivery networks (CDNs), and big data and artificial intelligence platforms.

[0302] Figure 24 A schematic diagram of a battery control method according to an embodiment of the present invention is shown in FIG. Figure 24 As shown, in the control unit of any of the above charging piles, the control method includes steps S241 and S242, wherein:

[0303] Step S241: Determine a target operating mode of the mode conversion circuit based on a second message sent by the vehicle's battery management system; wherein the target operating mode includes a DC charging mode, a pulse heating mode, or a pulse charging mode;

[0304] Step S242: Control the mode conversion circuit to enter the target working mode to perform DC charging, pulse heating or pulse charging on the battery.

[0305] Here, the second message may carry the operating mode, second indication information, etc. In implementation, the target operating mode can be determined by parsing the second message. In implementation, the implementation process of steps S241 to S242 can refer to the specific implementation of the aforementioned charging pile embodiment.

[0306] According to the above technical means, on the one hand, the target working mode of the mode conversion circuit is dynamically determined through the interactive messages between the battery management system and the charging pile, thereby realizing dynamic regulation of the charging mode and better meeting the charging needs of different vehicles; on the other hand, by integrating the mode conversion circuit at the charging pile end, the mode switching switch and the main negative relay switch are used to dynamically switch the working mode of the mode conversion circuit. On the basis of supporting the charging pile to perform DC charging of the battery, it also supports the coupling of pulse charging, pulse discharge and energy recovery through the energy interaction module to heat or pulse charge the battery. Therefore, first of all, the energy interaction module quickly heats the battery through pulse charging and discharging, without considering the hardware differences between different models, thereby improving the heating speed and heating uniformity, and reducing the heating caused by uneven heating. The possibility of shortened life and thermal runaway is reduced, thereby greatly extending the battery life and reducing operation and maintenance costs. At the same time, since there is no need to add additional heating devices to each vehicle, the cost of the entire vehicle is reduced; secondly, during the heating process, the battery can be discharged through the energy interaction module, eliminating the inconsistency of the charge state distribution and lithium ion concentration distribution in the thickness direction of the battery, reducing the risk of lithium plating while ensuring the charging speed, greatly improving the polarization phenomenon under high charge state and ensuring the capacity retention rate; thirdly, the energy interaction module can also recover the energy released by depolarization, avoiding energy waste while improving charging efficiency and safety; finally, the same energy interaction module can realize functions such as heating, charging, discharging and energy recovery, effectively reducing the volume of the charging pile and saving hardware costs.

[0307] In some embodiments, when the target operating mode is a DC charging mode, the control method further includes step S243, wherein:

[0308] Step S243: Based on the first message sent by the battery management system, control the mode conversion circuit to enter the constant voltage charging mode or the constant current charging mode, so that the mode conversion circuit performs DC charging for the battery according to the target voltage or target current.

[0309] Here, the first message may carry DC charging parameters, first indication information, and the like. These parameters may include, but are not limited to, the type of DC charging mode, voltage, current, and charging duration. By parsing the first message, the type of DC charging mode and the target voltage / target current can be determined. For implementation, the process of step S243 can be found in the specific implementation of the aforementioned charging pile embodiment.

[0310] In the implementation mode of the present application, first, the constant voltage charging mode or the constant current charging mode is dynamically determined through the interactive message between the BMS and the charging pile. Since no additional hardware circuit is required, the hardware complexity and failure rate are reduced, and the decoupling of the battery management algorithm and the charging pile execution layer is realized, thereby achieving the purpose of optimal energy management and equipment protection; secondly, the charging pile can charge the battery pack with constant voltage or constant current by adjusting the switching state of the mode switching switch and the main negative relay switch, thereby realizing customized charging management of the battery, reducing the polarization effect and lithium plating risk, and achieving the purpose of adapting to the battery characteristic requirements; finally, during the charging process, the BMS can dynamically adjust the interactive message according to the battery's state of charge to achieve intelligent switching between constant voltage mode and constant current mode, and / or dynamic configuration of constant voltage parameters or constant current parameters, thereby improving charging efficiency and safety while extending battery life.

[0311] In some embodiments, when the target operating mode is the pulse heating mode or the pulse charging mode, the control method further includes step S244, wherein:

[0312] Step S244: Based on the third message sent by the battery management system, the current direction of the mode conversion circuit is switched within the target period to perform pulse charging and pulse discharging on the battery.

[0313] Here, the third message may carry charging and discharging parameters, third indication information, etc. The charging and discharging parameters may include, but are not limited to, charging and discharging current, charging and discharging frequency f, and charging and discharging duty cycle D. By parsing the third message, the charging and discharging parameters can be determined. For implementation, the implementation process of step S244 above can refer to the specific implementation of the aforementioned charging pile embodiment.

[0314] In the implementation mode of the present application, the working mode of the mode conversion circuit is switched through interactive messages between the BMS and the charging pile, so that the charging pile can periodically adjust parameters such as the charging and discharging current and charging and discharging time. This not only improves the rationality, flexibility and intelligence of battery charging, but also improves charging safety while ensuring charging efficiency, thereby greatly extending the battery life.

[0315] In some embodiments, the control method further includes steps S245 to S247, wherein:

[0316] Step S245: determining the on-time of the first switch module in the energy interaction module based on the third message;

[0317] Step S246: During the on-time of the first switch module, the state of the first switch module is controlled to be closed, so as to perform pulse charging for the battery through the charging pile;

[0318] Step S247: Outside the conduction time of the first switch module, the state of the first switch module is controlled to be an open state, and the energy storage module in the energy interaction module is controlled to perform pulse charging, pulse discharging and energy recovery between the charging pile and the battery.

[0319] Here, the target period can be any suitable period. By parsing the third message, the charge and discharge parameters can be determined. In some embodiments, the on-time of VT1 can be determined based on the charging frequency and the charging duty cycle. For example, the on-time of VT1 can be determined using the above formula (2-1). For implementation, the above steps S245 to S247 can be referred to in the specific implementation of the aforementioned charging pile embodiment.

[0320] In the implementation manner of the present application, on the one hand, by setting the first switch module, during the charging process, the charging pile can adjust the conduction state of the first switch module, not only to perform pulse charging for the battery, but also to discharge the battery and recover the energy released by depolarization through the charging, discharging and energy recovery of the energy storage module, thereby achieving an optimized balance between charging efficiency, safety and energy management; on the other hand, the conduction time of the first switch module is dynamically determined through the interactive message between the BMS and the charging pile to adapt to the charging requirements of different BMSs, thereby improving the accuracy and flexibility of the conduction time, thereby reducing the fluctuation of voltage or current during the charging process.

[0321] In some embodiments, the control method further includes step S248, wherein:

[0322] Step S248: During a target time period, control the states of all switch modules in the first target switch module set to be in a closed state and the states of all switch modules in the second target switch module set to be in an open state, so as to store energy for the target object of the energy storage module; wherein the target time period is determined based on the third message.

[0323] Here, the target time period includes at least one of the following: a first time period, a second time period, a third time period, a fourth time period, a fifth time period, a sixth time period, and a seventh time period. The target object includes at least one of the following: L1, C1, L2, C2, L3, L4, and the target storage medium 400. The target objects corresponding to different time periods can be the same or different. For implementation, the implementation process of step S248 can refer to the specific implementation of the aforementioned charging pile embodiment.

[0324] According to the above technical means, on the one hand, the on-time of each switch module is dynamically determined through the interactive messages between the BMS and the charging pile to adapt to the charging needs of different stages, thereby improving the accuracy and flexibility of the on-time; on the other hand, by setting multiple switch modules in the energy storage module, the charging pile can adjust the on-state of each switch module to achieve energy storage of the inductor, energy storage of the capacitor and / or energy storage of the target storage medium in different time periods, thereby not only achieving the purpose of uniform heat generation during battery depolarization or pulse discharge, but also achieving the purpose of energy recovery during battery depolarization or uniform heat generation, thereby achieving the optimal balance between safety and energy management; on the other hand, by setting multiple energy storage modules, not only can the depolarization requirements of the battery be better met and the continuity and stability of the charging process be ensured, but also the energy in each capacitor can be transferred to the same long-term energy storage medium to ensure the normal alternating operation of each energy storage module, thereby reducing the energy storage cost.

[0325] Based on the above embodiments, the present application also provides a battery control device. Figure 25 This is a schematic diagram of the structure of a battery control device provided in an embodiment of the present application, which is applied to the control unit of any of the above-mentioned charging piles, such as Figure 25 As shown, the battery control device 250 includes a determination module 251 and a control module 252, wherein:

[0326] A determination module 251 is configured to determine a target mode of the mode conversion circuit based on a second message sent by the vehicle's battery management system; wherein the target mode includes a DC charging mode, a pulse heating mode, or a pulse charging mode;

[0327] The control module 252 is used to control the mode conversion circuit to enter the target mode to perform DC charging, pulse heating or pulse charging on the battery.

[0328] In some embodiments, the control module 252 is further used to: based on the first message sent by the battery management system, control the mode conversion circuit to enter the constant voltage charging mode or the constant current charging mode, so that the mode conversion circuit performs DC charging for the battery according to the target voltage or target current.

[0329] In some embodiments, the control module 252 is further configured to: based on a third message sent by the battery management system, switch the current direction of the mode conversion circuit within a target cycle to perform pulse charging and pulse discharging on the battery.

[0330] In some embodiments, the determination module 251 is further used to: determine the on-time of the first switch module in the energy interaction module based on the third message; the control module 252 is further used to: control the state of the first switch module to a closed state during the on-time of the first switch module to perform pulse charging for the battery through the charging pile; outside the on-time of the first switch module, control the state of the first switch module to an unclosed state, and control the energy storage module in the energy interaction module to perform pulse charging, pulse discharging and energy recovery between the charging pile and the battery.

[0331] In some embodiments, the control module 252 is further used to: control the states of all switch modules in the first target switch module set to be in a closed state and the states of all switch modules in the second target switch module set to be in an unclosed state within a target time period, so as to store energy for the target object of the energy storage module; wherein the target time period is determined based on the third message.

[0332] The description of the above device embodiment is similar to the description of the above method embodiment and has similar beneficial effects as the method embodiment. For technical details not disclosed in the device embodiment of this application, please refer to the description of the method embodiment of this application for understanding.

[0333] It should be noted that in the embodiments of the present application, if the above method is implemented in the form of a software function module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiments of the present application, or the part that contributes to the relevant technology, can be embodied in the form of a software product. The software product is stored in a storage medium and includes several instructions for enabling an electronic device (which can be a personal computer, server, or network device, etc.) to execute all or part of the methods described in each embodiment of the present application. The aforementioned storage medium includes various media that can store program code, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a magnetic disk, or an optical disk. In this way, the embodiments of the present application are not limited to any specific combination of hardware and software.

[0334] The present application also provides an electronic device, including a memory and a processor, wherein the memory stores a computer program that can be run on the processor, and the processor implements any of the above methods when executing the computer program.

[0335] The present application also provides a computer-readable storage medium having a computer program stored thereon, which implements the above method when executed by a processor. The computer-readable storage medium may be transient or non-transient.

[0336] The present application also provides a computer program product, comprising a computer program or instructions that, when executed by a processor, implement some or all of the steps in any of the above methods. The computer program product may be implemented in hardware, software, or a combination thereof. In one optional embodiment, the computer program product is embodied as a computer storage medium. In another optional embodiment, the computer program product is embodied as a software product, such as a software development kit (SDK).

[0337] It should be noted that Figure 26 This is a hardware entity diagram of an electronic device provided in an embodiment of the present application, such as Figure 26 As shown, the hardware entity of the electronic device 500 includes: a processor 501, a communication interface 502 and a memory 503, wherein:

[0338] The processor 501 generally controls the overall operations of the electronic device 500 .

[0339] The communication interface 502 enables the electronic device to communicate with other terminals or servers through a network.

[0340] Memory 503 is configured to store instructions and applications executable by processor 501. It can also cache data to be processed or processed by processor 501 and various modules in electronic device 500 (e.g., image data, audio data, voice communication data, and video communication data). This can be implemented using flash memory (FLASH) or random access memory (RAM). Data can be transmitted between processor 501, communication interface 502, and memory 503 via bus 504.

[0341] It should be noted that the description of the above storage medium and device embodiments is similar to the description of the above method embodiments and has similar beneficial effects as the method embodiments. For technical details not disclosed in the storage medium and device embodiments of this application, please refer to the description of the method embodiments of this application for understanding.

[0342] The above embodiments are only preferred embodiments for fully illustrating the present application, and the protection scope of the present application is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art based on the present application are within the protection scope of the present application.

Claims

1. A mode conversion circuit, characterized in that: Applied to charging piles, including mode switching switch, main and negative relay switches and energy interaction module, including: The mode switching switch is connected to the positive terminal of the charging pile and the positive terminal of the vehicle's battery respectively; The main negative relay switch is connected to the negative terminal of the charging pile and the negative terminal of the battery respectively; The energy interaction module is connected to the mode switching switch and the negative terminal of the charging pile respectively; When the mode switching switch is closed and the main negative relay switch is closed, the mode conversion circuit enters the DC charging mode to perform DC charging for the battery through the charging pile; When the mode switching switch is not closed and the main negative relay switch is closed, the mode conversion circuit enters the pulse heating mode or the pulse charging mode, so as to perform pulse charging, pulse discharging and energy recovery between the charging pile and the battery through the energy interaction module, thereby performing pulse heating or pulse charging on the battery.

2. The mode conversion circuit according to claim 1, wherein: The DC charging mode includes a constant voltage charging mode or a constant current charging mode, wherein: When the mode switching switch is closed and the main negative relay switch is closed, the mode conversion circuit enters the constant voltage charging mode to perform constant voltage charging for the battery through the charging pile, or the mode conversion circuit enters the constant current charging mode to perform constant current charging for the battery through the charging pile; wherein, the constant voltage charging mode or the constant current charging mode is determined based on the first message sent by the battery management system of the vehicle.

3. The mode conversion circuit according to claim 1, wherein: The mode conversion circuit further includes: The pre-charge switch and the pre-charge resistor are connected to the positive terminal of the charging pile and the mode switching switch respectively; a bus capacitor connected to the pre-charge switch and the negative terminal of the charging pile respectively; When the pre-charging switch is not closed, the mode conversion circuit enters a pre-charging mode to pre-charge the bus capacitor through the charging pile.

4. The mode conversion circuit according to any one of claims 1 to 3, characterized in that: The energy interaction module includes a first switch module and an energy storage module, wherein: The first switch module is connected to the mode switching switch and the energy storage module respectively; The energy storage module is connected to the first switch module and the negative terminal of the charging pile respectively; When the first switch module is in a closed state, pulse charging is performed on the battery through the charging pile; When the first switch module is in an unclosed state, pulse charging, pulse discharging and energy recovery are performed between the charging pile and the battery through the energy storage module.

5. The mode conversion circuit according to claim 4, wherein: The energy storage module includes a second switch module, a third switch module, a fourth switch module, a fifth switch module, a seventh switch module, a tenth switch module and a first energy storage module, wherein: The second switch module is connected to the positive terminal of the battery and the fourth switch module respectively; The third switch module is connected to the positive terminal of the battery and the fifth switch module respectively; The fourth switch module is connected to the second switch module and the negative terminal of the charging pile respectively; The fifth switch module is connected to the third switch module and the negative terminal of the charging pile respectively; The seventh switch module is connected to the second switch module and the first energy storage module respectively; The tenth switch module is connected to the first energy storage module and the fifth switch module respectively; When all switch modules in the first switch module set are in a closed state and all switch modules in the second switch module set are in an unclosed state, energy is stored for the first inductor in the first energy storage module by using the battery, the first switch module set includes the second switch module, the fifth switch module, and the seventh switch module, and the second switch module set includes the third switch module, the fourth switch module, and the tenth switch module; When the states of all switch modules in the third switch module set are in a closed state and the states of all switch modules in the fourth switch module set are in an unclosed state, energy is stored for the first capacitor in the first energy storage module by the battery. The third switch module set includes the second switch module, the fifth switch module, the seventh switch module, and the tenth switch module, and the fourth switch module set includes the third switch module and the fourth switch module.

6. The mode conversion circuit according to claim 5, wherein: The first energy storage module further includes a ninth switch module and an eleventh switch module, wherein: The ninth switch module is connected to the first inductor and the first capacitor respectively; The eleventh switch module is connected to the first inductor and the fifth switch module respectively; The first inductor is connected to the seventh switch module and the eleventh switch module respectively; The first capacitor is connected to the ninth switch module and the tenth switch module respectively; When the ninth switch module is in a closed state and the eleventh switch module is in an open state, the first inductor stores energy; When the ninth switch module is in an open state and the eleventh switch module is in a closed state, the first capacitor stores energy.

7. The mode conversion circuit according to claim 5, wherein: The energy storage module further includes a second energy storage module, wherein: The seventh switch module and the tenth switch module are also connected to the second energy storage module; When all switch modules in the fifth switch module set are in a closed state and all switch modules in the sixth switch module set are in an open state, energy is continuously stored for the first capacitor through the first inductor and energy is stored for the second inductor in the second energy storage module through the battery, the fifth switch module set includes the third switch module, the fourth switch module, and the tenth switch module, and the sixth switch module set includes the second switch module, the fifth switch module, and the seventh switch module; When the states of all switch modules in the seventh switch module set are in a closed state and the states of all switch modules in the eighth switch module set are in an unclosed state, energy is stored for the second capacitor in the second energy storage module through the second inductor. The seventh switch module set includes the third switch module, the fourth switch module, the seventh switch module, and the tenth switch module, and the eighth switch module set includes the second switch module and the fifth switch module.

8. The mode conversion circuit according to claim 7, wherein: The second energy storage module further includes a sixth switch module and an eighth switch module, wherein: The sixth switch module is connected to the second inductor and the seventh switch module respectively; The eighth switch module is connected to the second capacitor and the second inductor respectively; The second inductor is connected to the tenth switch module and the sixth switch module respectively; The second capacitor is connected to the eighth switch module and the tenth switch module respectively; When the sixth switch module is in a closed state and the eighth switch module is in an open state, the second inductor stores energy; When the sixth switch module is in an open state and the eighth switch module is in a closed state, the second capacitor stores energy.

9. The mode conversion circuit according to claim 7, wherein: The energy storage module further includes a third energy storage module, wherein: The third energy storage module is connected to the first capacitor of the first energy storage module and the positive terminal of the target storage medium respectively; The first capacitor is further connected to the negative terminal of the target storage medium; When all switch modules in the seventh switch module set are in a closed state and all switch modules in the eighth switch module set are in an open state, storing energy in the third inductor in the third energy storage module through the first capacitor, so as to transfer energy of the first capacitor to the target storage medium; When the states of all switch modules in the ninth switch module set are in a closed state and the states of all switch modules in the tenth switch module set are in an unclosed state, energy is stored in the first inductor through the battery, energy is continued to be stored in the second capacitor through the second inductor, and energy is stored in the target storage medium through the third inductor. The ninth switch module set includes the second switch module, the fifth switch module, the seventh switch module, the eighth switch module in the second energy storage module, and the eleventh switch module in the first energy storage module. The tenth switch module set includes the third switch module, the fourth switch module, the sixth switch module in the second energy storage module, the ninth switch module in the first energy storage module, and the tenth switch module.

10. The mode conversion circuit according to claim 9, wherein: The energy storage module further includes a fourth energy storage module, wherein: The fourth energy storage module is connected to the second capacitor of the second energy storage module and the positive terminal of the target storage medium respectively; The second capacitor is further connected to the negative terminal of the target storage medium; When all switch modules in the eleventh switch module set are in a closed state and all switch modules in the twelfth switch module set are in an unclosed state, energy is stored in the first capacitor by the battery, and energy is stored in the fourth inductor in the fourth energy storage module by the second capacitor, so as to transfer energy of the second capacitor to the target storage medium. The eleventh switch module set includes the second switch module, the fifth switch module, the seventh switch module, the ninth switch module in the first energy storage module, and the tenth switch module. The twelfth switch module set includes the third switch module, the fourth switch module, the sixth switch module in the second energy storage module, the eighth switch module in the second energy storage module, and the eleventh switch module in the first energy storage module. When the states of all switch modules in the thirteenth switch module set are in a closed state and the states of all switch modules in the fourteenth switch module set are in an unclosed state, energy is continuously stored for the first capacitor through the first inductor, energy is stored for the second inductor through the battery, and energy is stored for the target storage medium through the fourth inductor. The thirteenth switch module set includes the third switch module, the fourth switch module, the sixth switch module in the second energy storage module, the ninth switch module in the first energy storage module, and the tenth switch module. The fourteenth switch module set includes the second switch module, the fifth switch module, the seventh switch module, the eighth switch module in the second energy storage module, the eleventh switch module in the first energy storage module, the twelfth switch module in the third energy storage module, and the thirteenth switch module in the fourth energy storage module.

11. A charging pile, characterized in that: The method comprises a mode conversion unit and a control unit, wherein the mode conversion unit comprises the mode conversion circuit according to any one of claims 1 to 10, wherein: The control unit is connected to the mode conversion unit and is used to control the mode conversion circuit to enter a target operating mode based on a second message sent by the battery management system of the vehicle; the target operating mode includes a DC charging mode, a pulse heating mode or a pulse charging mode.

12. The charging pile according to claim 11, characterized in that: The control unit is further configured to: Based on the first message sent by the battery management system, control the mode conversion circuit to enter a constant voltage charging mode or a constant current charging mode, so that the mode conversion circuit performs direct current charging for the battery according to a target voltage or a target current; Based on the third message sent by the battery management system, the current direction of the mode conversion circuit is switched within a target period to perform pulse charging and pulse discharging on the battery.

13. The charging pile according to claim 12, characterized in that: The control unit is further configured to: Determining, based on the third message, a conduction time of the first switch module in the energy interaction module; During the on-time of the first switch module, controlling the state of the first switch module to be in a closed state, so as to perform pulse charging for the battery through the charging pile; Outside the conduction time of the first switch module, the state of the first switch module is controlled to be an unclosed state, and the energy storage module in the energy interaction module is controlled to perform pulse charging, pulse discharging and energy recovery between the charging pile and the battery.

14. The charging pile according to claim 13, characterized in that: The control unit is further configured to: During a target time period, controlling the states of all switch modules in the first target switch module set to be in a closed state and the states of all switch modules in the second target switch module set to be in an unclosed state, so as to store energy for the target object of the energy storage module; The target time period is determined based on the third message, and the target time period includes at least one of the following: a first time period, a second time period, a third time period, a fourth time period, a fifth time period, a sixth time period, and a seventh time period; When the target time period is the first time period, the first target switch module set includes a first switch module set, the second target switch module set includes a second switch module set, and the target object includes a first inductor in a first energy storage module of the energy storage module; When the target time period is the second time period, the first target switch module set includes a third switch module set, the second target switch module set includes a fourth switch module set, and the target object includes a first capacitor in the first energy storage module; When the target time period is the third time period, the first target switch module set includes the fifth switch module set, the second target switch module set includes the sixth switch module set, and the target object includes the first capacitor and the second inductor in the second energy storage module of the energy storage module; When the target time period is the fourth time period, the first target switch module set includes the seventh switch module set, the second target switch module set includes the eighth switch module set, and the target object includes the second capacitor in the second energy storage module and the third inductor in the third energy storage module of the energy storage module; When the target time period is the fifth time period, the first target switch module set includes a ninth switch module set, the second target switch module set includes a tenth switch module set, and the target object includes the first inductor, the second capacitor, and a target storage medium; When the target time period is the sixth time period, the first target switch module set includes the eleventh switch module set, the second target switch module set includes the twelfth switch module set, and the target object includes the first capacitor and the fourth inductor in the fourth energy storage module of the energy storage module; When the target time period is the seventh time period, the first target switch module set includes the thirteenth switch module set, the second target switch module set includes the fourteenth switch module set, and the target object includes the first capacitor, the second inductor, and the target storage medium.

15. A battery control method, characterized in that: The control unit of the charging pile according to any one of claims 11 to 14 comprises: Determining a target mode of the mode conversion circuit based on a second message sent by a battery management system of the vehicle; wherein the target mode includes a DC charging mode, a pulse heating mode, or a pulse charging mode; The mode conversion circuit is controlled to enter the target mode to perform direct current charging, pulse heating or pulse charging on the battery.

16. A battery control device, characterized in that: The control unit of the charging pile according to any one of claims 11 to 14 comprises: a determination module, configured to determine a target operating mode of the mode conversion circuit based on a second message sent by a battery management system of the vehicle; wherein the target operating mode includes a DC charging mode, a pulse heating mode, or a pulse charging mode; A control module is used to control the mode conversion circuit to enter the target working mode to perform DC charging, pulse heating or pulse charging on the battery.

17. An electronic device, characterized in that: The method comprises a processor and a memory, wherein the memory stores a computer program that can be run on the processor, and when the processor executes the computer program, the method according to claim 15 is implemented.

18. A computer-readable storage medium, characterized in that A computer program is stored thereon, and when the computer program is executed by a processor, the method according to claim 15 is implemented.

19. A computer program product comprising a computer program or instructions, characterized in that When the computer program or instructions are executed by a processor, the method according to claim 15 is implemented.

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