Battery control method, ground support equipment, medium and program product

Abstract

The present application discloses a battery control method, ground equipment, medium and program product, which belongs to the field of charge and discharge control technology. The method includes: obtaining the total charge and discharge state parameters and external charge and discharge parameters of the battery pack; when the total charge and discharge state parameters do not match the external charge and discharge parameters, selecting at least one target battery from the battery pack, so that after the charge and discharge state parameters of the target battery are assigned to preset values, the total charge and discharge state parameters recalculated match the external charge and discharge parameters; through the bidirectional DCDC corresponding to the target battery, the target battery is controlled to charge and discharge based on the charge and discharge strategy corresponding to the preset value, and through the bidirectional DCDC corresponding to each remaining battery, each remaining battery is controlled to charge and discharge based on the charge and discharge balance strategy. The present application can maximize the charge and discharge balance between batteries with different battery voltages.

Description

Technical Field

[0001] The present application relates to the technical field of charge and discharge control, and in particular to a battery control method, ground support equipment, medium and program product. Background Art

[0002] With the popularization of electric vehicles that use electricity as the main power source, such as new energy vehicles, eVTOL (Electric Vertical Takeoff and Landing), and new energy ships, it is necessary to use batteries carried by ground support equipment such as ground support vehicles to charge electric vehicles.

[0003] The batteries on the ground handling vehicle may include rechargeable batteries and / or non-rechargeable batteries, and the battery voltages of different rechargeable batteries and / or non-rechargeable batteries may be different. In the related art, a bidirectional DCDC (Direct Current Direct Current Converter) is used to adjust the voltage so that each battery can work normally. In the related art, the balanced charging and discharging of each battery is controlled by a battery charge and discharge balancing strategy.

[0004] However, when the total charge and discharge state parameters of the battery pack do not match the external charge and discharge parameters such as the charging power of the charging pile or the load power, it is difficult for the battery pack to achieve charge and discharge balance. Summary of the invention

[0005] The main purpose of the present application is to provide a battery control method, ground support equipment, medium and program product, aiming to solve the technical problem in the related art that a battery control strategy is urgently needed that can maximize the realization of charge and discharge balance when the total charge and discharge state parameters of the battery pack do not match the external charge and discharge parameters such as the charging power of the charging pile or the load power.

[0006] To achieve the above object, the present application provides a battery control method, the method comprising:

[0007] Obtaining total charge and discharge state parameters and external charge and discharge parameters of a battery pack; the battery pack includes a plurality of batteries connected in parallel, and the batteries are connected to a DC bus through a bidirectional DC converter DCDC;

[0008] In the case where the total charge and discharge state parameter does not match the external charge and discharge parameter, at least one target battery is selected from the battery pack so that after the charge and discharge state parameter of the target battery is assigned a preset value, the total charge and discharge state parameter recalculated matches the external charge and discharge parameter; wherein the preset value corresponds to the parameter type of the charge and discharge state parameter;

[0009] Through the bidirectional DCDC corresponding to the target battery, the target battery is controlled to be charged and discharged based on the charge and discharge strategy corresponding to the preset value, and through the bidirectional DCDC corresponding to each remaining battery, each remaining battery is controlled to be charged and discharged based on the charge and discharge balancing strategy. The remaining batteries are the batteries in the battery pack except the target battery.

[0010] In one embodiment, in the charging process, the total charge and discharge state parameter is the total allowable charging current of all rechargeable batteries, and the external charge and discharge parameter is the output current of the charging pile;

[0011] In the case where the total charge and discharge state parameter does not match the external charge and discharge parameter, at least one target battery is selected from the battery pack, including:

[0012] When the total allowed charging current is greater than the output current of the charging pile, the rechargeable battery with the largest state of charge parameter among all the rechargeable batteries is marked as the first target battery;

[0013] Assigning the allowed charging current of the first target battery to 0;

[0014] Recalculating a first total allowable charging current of all rechargeable batteries to determine a first total current recalculation result;

[0015] In the case where the recalculated result of the first total current is greater than the output current of the charging pile, the rechargeable battery with the largest state of charge parameter among all the rechargeable batteries whose allowable charging current is not 0 is marked as the first target battery, and the step of assigning the allowable charging current of the first target battery to 0 is returned to be executed until the recalculated result of the first total current is less than or equal to the output current of the charging pile, so as to select at least one target battery from the battery pack;

[0016] The target battery is controlled to be charged and discharged based on a charge and discharge strategy corresponding to a preset value by a bidirectional DCDC corresponding to the target battery, and each remaining battery is controlled to be charged and discharged based on a charge and discharge balancing strategy by a bidirectional DCDC corresponding to each remaining battery, including:

[0017] For each remaining battery, based on the charging stage of the remaining battery, the remaining battery is charged at the corresponding stage through the corresponding bidirectional DCDC control;

[0018] When it is detected that the cycle condition is triggered, updating the allowed charging current of the first target battery based on the actual allowed charging current of the first target battery;

[0019] Return to the step of recalculating the first total allowable charging current of all rechargeable batteries and determining a first total current recalculation result until the voltage of each rechargeable battery rises to the charging cut-off voltage.

[0020] In one embodiment, the loop conditions include:

[0021] The charging time reaches the preset time; or

[0022] It is monitored that the voltage of at least one remaining battery rises to the constant voltage charging voltage.

[0023] In one embodiment, when the total allowed charging current is greater than the output current of the charging pile, before marking the rechargeable battery with the largest state of charge parameter among all the rechargeable batteries as the first target battery, the method further includes:

[0024] When the total allowable charging current is greater than the output current of the charging pile, the allowable charging current of all rechargeable batteries in the constant voltage stage is assigned to 0;

[0025] Recalculating the total allowable charging current of all rechargeable batteries to determine a second total current recalculation result;

[0026] When the second total current recalculated result is less than or equal to the output current of the charging pile, the corresponding bidirectional DCDC controls each rechargeable battery in the constant current stage to perform constant current charging;

[0027] When it is detected that all rechargeable batteries are in the constant voltage stage, the corresponding bidirectional DCDC controls each rechargeable battery to perform constant voltage charging until the voltage of all rechargeable batteries rises to the charging cut-off voltage;

[0028] When the recalculated result of the second total current is greater than the output current of the charging pile, a step of marking the rechargeable battery with the largest state of charge parameter among all the rechargeable batteries as the first target battery is performed.

[0029] In one embodiment, the battery pack includes a plurality of rechargeable batteries and a plurality of non-rechargeable batteries, and in the discharge process, the external charge and discharge parameter is the load power;

[0030] In the case where the total charge and discharge state parameter does not match the external charge and discharge parameter, at least one target battery is selected from the battery pack, including:

[0031] Among all the rechargeable batteries, the rechargeable battery with the largest remaining capacity is used as the first main battery;

[0032] When the first total maximum power of all non-rechargeable batteries is greater than or equal to the load power, determining whether the first total rated power of the battery pack is less than the load power; the first total rated power is the sum of the rated powers of the first main battery and all non-rechargeable batteries;

[0033] When the first total rated power is less than the load power, the non-rechargeable battery with the smallest maximum power among all non-rechargeable batteries is marked as the second target battery;

[0034] Assigning the rated power of the second target battery to the maximum power corresponding to the second target battery;

[0035] Recalculating the first total rated power to obtain a first total power recalculation result;

[0036] When the recalculated result of the first total power is less than the load power, the non-rechargeable battery with the smallest maximum power among all non-rechargeable batteries except the second target battery is marked as the second target battery;

[0037] Return to the step of assigning the rated power of the second target battery to the maximum power corresponding to the second target battery, until the recalculated result of the first total power is greater than or equal to the load power;

[0038] The target battery is controlled to be charged and discharged based on a charge and discharge strategy corresponding to a preset value through a bidirectional DCDC corresponding to the target battery, including:

[0039] The first main battery is controlled by the corresponding bidirectional DCDC to perform constant voltage discharge according to the DC bus voltage, and each second target battery is controlled by the corresponding bidirectional DCDC to perform constant power discharge based on the corresponding maximum power.

[0040] In one embodiment, each remaining battery is controlled to be charged and discharged based on a charge and discharge balancing strategy through a bidirectional DCDC corresponding to each remaining battery, including:

[0041] For any remaining non-rechargeable battery except the second target battery, determine a target non-rechargeable battery ranked before the remaining non-rechargeable battery from the first battery sequence; the first battery sequence includes all non-rechargeable batteries and the first main battery, and all the second target batteries are ranked before all the remaining non-rechargeable batteries, and the first main battery is ranked after all the non-rechargeable batteries;

[0042] For any remaining non-rechargeable battery except the second target battery, determine a first reference total power of the remaining non-rechargeable battery; wherein the first reference total power is the sum of the rated powers of all batteries in the first battery sequence except the target non-rechargeable battery;

[0043] For any remaining non-rechargeable battery except the second target battery, determine a first output power from the first load power to be allocated; wherein the first load power to be allocated is a portion of the load power except the maximum power of all target non-rechargeable batteries, and a ratio of the first output power to the first load power to be allocated is equal to a ratio of the rated power of the remaining non-rechargeable battery to the first reference total power;

[0044] The corresponding bidirectional DCDC controls each remaining non-rechargeable battery to output constant power at the corresponding first output power.

[0045] In one embodiment, after determining whether the first total rated power of the battery pack is less than the load power, the method further includes:

[0046] When the first total rated power is greater than or equal to the load power, for each non-rechargeable battery, determining a second output power of the non-rechargeable battery; wherein a ratio of the second output power to the corresponding rated power is equal to a ratio of the load power to the first total rated power;

[0047] Each non-rechargeable battery is controlled by a corresponding bidirectional DCDC to output a constant power at a corresponding second output power.

[0048] In one embodiment, after the rechargeable battery with the largest remaining capacity among all the rechargeable batteries is used as the first main battery, the method further includes:

[0049] When the first total maximum power of all non-rechargeable batteries is less than the load power, and the second total maximum power of all rechargeable batteries and all non-rechargeable batteries is greater than or equal to the load power, all remaining rechargeable batteries except the first main battery among all rechargeable batteries are sorted from large to small according to the remaining capacity to obtain a sequence of remaining rechargeable batteries;

[0050] For any remaining rechargeable battery in the sequence of remaining rechargeable batteries, determining all target rechargeable batteries that are ranked before the remaining rechargeable battery;

[0051] For any remaining rechargeable battery in the remaining rechargeable battery sequence, determine a reference total remaining capacity of the remaining rechargeable battery; the reference total remaining capacity is the sum of the remaining capacities of all rechargeable batteries in the remaining rechargeable battery sequence except all target rechargeable batteries and the remaining capacity of the first main battery;

[0052] For any remaining rechargeable battery in the sequence of remaining rechargeable batteries, a third output power is determined from the second load power to be allocated; the ratio of the third output power to the second load power to be allocated is equal to the ratio of the corresponding remaining capacity to the reference total remaining capacity; the second load power to be allocated is the portion of the load power other than the first total maximum power and the maximum power of all target rechargeable batteries;

[0053] The first main battery is controlled by the corresponding bidirectional DCDC to perform constant voltage discharge according to the DC bus voltage, and each non-rechargeable battery is controlled by the corresponding bidirectional DCDC to perform constant power discharge based on the corresponding maximum power, and for any remaining rechargeable battery in the remaining rechargeable battery sequence, when the third output power is greater than or equal to the corresponding maximum power, the remaining rechargeable battery is controlled by the corresponding bidirectional DCDC to perform constant power output at the corresponding maximum power; when the third output power is less than the corresponding maximum power, the remaining rechargeable battery is controlled by the corresponding bidirectional DCDC to perform constant power output at the third output power.

[0054] In one embodiment, the battery pack includes a plurality of non-rechargeable batteries, and in the discharge process, the total charge and discharge state parameter is the second total rated power of all non-rechargeable batteries, and the external charge and discharge parameter is the load power;

[0055] In the case where the total charge and discharge state parameter does not match the external charge and discharge parameter, at least one target battery is selected from the battery pack, including:

[0056] When the second total rated power is less than the load power, the non-rechargeable battery with the largest rated power among all the non-rechargeable batteries is marked as the second main battery, and the non-rechargeable batteries other than the second main battery are marked as pending batteries;

[0057] Mark the undetermined battery with the smallest maximum power as the third target battery;

[0058] Assigning the rated power of the third target battery to the maximum power corresponding to the third target battery;

[0059] Recalculating the second total rated power of all non-rechargeable batteries to obtain a second total power recalculation result;

[0060] When the total power recalculated result is less than the load power, the remaining battery to be determined with the smallest maximum power among all the remaining batteries except the third target battery is marked as the third target battery;

[0061] Return to the step of assigning the rated power of the third target battery to the maximum power corresponding to the third target battery, until the recalculated result of the second total power is greater than or equal to the load power;

[0062] For any remaining undetermined battery except the third target battery, determining a fourth output power based on a preset charge and discharge balancing strategy;

[0063] The target battery is controlled to be charged and discharged based on a charge and discharge strategy corresponding to a preset value by a bidirectional DCDC corresponding to the target battery, and each remaining battery is controlled to be charged and discharged based on a charge and discharge balancing strategy by a bidirectional DCDC corresponding to each remaining battery, including:

[0064] The second main battery is controlled by the corresponding bidirectional DCDC to perform constant voltage discharge at the DC bus voltage, each third target battery is controlled by the corresponding bidirectional DCDC to perform constant power discharge at the corresponding maximum power, and any remaining undetermined battery except the third target battery is controlled by the corresponding bidirectional DCDC to perform constant power discharge at the corresponding fourth output power.

[0065] In one embodiment, determining the fourth output power based on a preset charge-discharge balancing strategy includes:

[0066] Determine a target battery to be determined that is ranked before the remaining batteries to be determined from a second battery sequence; the second battery sequence includes all the non-rechargeable batteries, and all the third target batteries are ranked before all the remaining batteries to be determined, and the second main battery is ranked at the end;

[0067] Determine a second reference total power of the remaining batteries to be determined; the second reference total power is the sum of the rated powers of all batteries in the second battery sequence except the target battery to be determined;

[0068] A fourth output power is determined from the third load power to be allocated; wherein the third load power to be allocated is the part of the load power excluding the maximum power of all third target batteries and the maximum power of the target battery to be determined; and the ratio of the fourth output power to the third load power to be allocated is equal to the ratio of the rated power of the remaining batteries to be determined to the second reference total power.

[0069] In one embodiment, after obtaining the total charge and discharge state parameters and external charge and discharge parameters of the battery pack, the method further includes:

[0070] When the second total rated power is greater than or equal to the load power, the non-rechargeable battery with the largest rated power among all the non-rechargeable batteries is marked as the third main battery, and the batteries other than the third main battery are marked as the first auxiliary battery;

[0071] The third main battery is controlled by the corresponding bidirectional DCDC to perform constant voltage discharge at the DC bus voltage, and each first subsidiary battery is controlled by the corresponding bidirectional DCDC to perform constant power discharge according to the corresponding fifth output power; wherein the ratio of the fifth output power of any first subsidiary battery to the load power is equal to the ratio of the rated power of any first subsidiary battery to the second total rated power.

[0072] In addition, the present application also provides an electric vehicle ground handling equipment, the electric vehicle ground handling equipment comprising:

[0073] Movable vehicles;

[0074] A DC bus and a battery pack, both of which are arranged on a movable carrier, the battery pack includes a plurality of batteries connected in parallel, and the batteries are connected to the DC bus through a bidirectional DC converter DCDC;

[0075] A control module is disposed on a movable carrier, and the control module is respectively connected to each battery and each bidirectional DCDC communication. The control module includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, and the computer program is configured to implement the steps of the battery control method as described above.

[0076] In one embodiment, a parallel power supply and discharge main circuit and a pre-charge branch are arranged between the battery and the bidirectional DCDC. The power supply and discharge main circuit includes a first contactor and a fuse, and the pre-charge branch includes a pre-charge resistor and a second contactor connected in series. The second contactor is used to turn on or off the pre-charge branch.

[0077] In one embodiment, it further includes:

[0078] An electric energy driving module, which is arranged on the movable vehicle and is used to drive the movable vehicle to move;

[0079] An external charging module, the external charging module is arranged on the movable vehicle, and the external charging module is used to charge the battery pack of the electric vehicle;

[0080] Among them, the DC bus is connected to the electric energy drive module and the external charging module respectively, the battery is detachably connected to the movable carrier, and the specifications of the battery are consistent with the specifications of the battery pack.

[0081] In one embodiment, the external charging module includes:

[0082] A charging pile body, which is arranged on a movable vehicle and is detachably connected to the electric vehicle through a pipeline;

[0083] The thermal management module is arranged on a movable carrier. The thermal management module is constructed to be connected to the battery cavity of the electric vehicle to form a battery heat exchange branch when the charging pile body is connected to the electric vehicle, so that the insulating heat exchange fluid in the thermal management module can flow in the battery heat exchange branch and be filled into the battery cavity.

[0084] In one embodiment, the charging pile body has a device cavity, and a charging module is arranged in the device cavity;

[0085] The thermal management module is also constructed to communicate with the device cavity to form a device heat exchange branch, so that the insulating heat exchange fluid flows in the device heat exchange branch and fills the device cavity.

[0086] In one embodiment, the thermal management module includes a main circuit, which includes a medium storage tank, a pump, and a heat exchanger that are sequentially connected through a pipeline;

[0087] Among them, the device heat exchange branch and the battery heat exchange branch are connected in parallel and then connected in series to the main circuit to form a circulation loop; or, the device heat exchange branch, the battery heat exchange branch and the main circuit are connected in series to form a circulation loop.

[0088] In one embodiment, a cooling channel is defined in at least one of the control module, the electric energy drive module and the battery, and the thermal management module is connected to the cooling channel to allow the insulating heat exchange fluid to flow in the cooling channel.

[0089] In one embodiment, the movable vehicle includes a compartment, and the external charging module and the battery are both disposed in the compartment;

[0090] Heat dissipation holes are provided at the side wall of the carriage corresponding to the position of the external charging module;

[0091] The movable vehicle also includes a rainproof component, which is arranged at the heat dissipation hole.

[0092] In one embodiment, the side wall of the vehicle compartment is further provided with a battery access hole and a charging gun access hole, the battery access hole is for the battery to pass through, and the charging gun access hole is for the charging gun of the external charging module to pass through; the movable vehicle also includes a first cover and a second cover, the first cover can be opened and closed at the battery access hole to open or close the battery access hole, and the second cover can be opened and closed at the charging gun access hole to open or close the charging gun access hole.

[0093] In one embodiment, the external charging module has a battery debugging interface, and a battery debugging position is also defined in the vehicle compartment. The battery debugging position is arranged adjacent to the external charging module. The side wall of the vehicle compartment is provided with a hatch opening directly opposite to the battery debugging position. The movable vehicle also includes a debugging hatch, which is arranged at the hatch opening to open or close the hatch opening, and the debugging hatch is used for allowing the battery to pass through.

[0094] In one embodiment, the inner wall of the carriage is provided with a fireproof layer, and the fireproof layer is constructed as an aerogel fireproof coating or a fireproof paint layer; and / or

[0095] The movable vehicle also includes a fire extinguishing component, which is arranged in the vehicle compartment and is a perfluorohexanone spray component.

[0096] In one embodiment, the movable carrier further comprises:

[0097] A chassis, wherein the chassis is provided with a carriage;

[0098] The traction rod is arranged at one end of the chassis in the length direction.

[0099] In addition, the present application also provides a storage medium, which is a computer-readable storage medium. A computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the battery control method as described above are implemented.

[0100] In addition, the present application also provides a computer program product, which includes a computer program. When the computer program is executed by a processor, the steps of the battery control method as described above are implemented.

[0101] One or more technical solutions proposed in this application have at least the following technical effects:

[0102] The battery control method proposed in the present application, when the total charge and discharge state parameters of the battery pack do not match the external charge and discharge parameters such as the charging power of the charging pile or the load power, controls some batteries independently as target batteries, and controls the charge and discharge of the remaining batteries through a charge and discharge balancing strategy, thereby maximizing the charge and discharge balance between batteries with different battery voltages.

[0103] In addition, when the charging power of the charging pile is insufficient, the present application first charges the batteries in the constant current stage, and then charges the batteries in the constant voltage stage, thereby making full use of the charging power of the charging pile so that all batteries can eventually reach the effect of nearly synchronous full charge and achieve charging balance.

[0104] In addition, when all non-rechargeable batteries are discharged, this application provides a power allocation strategy based on rated power to maximize the discharge efficiency of non-rechargeable batteries. When non-rechargeable batteries and rechargeable batteries are discharged together, power allocation is performed considering the remaining capacity of different batteries, and batteries with different remaining capacities are discharged synchronously to the minimum value as much as possible to achieve discharge balance.

[0105] In addition, in the technical solution of the present application, the electric energy driving module for driving the movable vehicle and the external charging module for charging the battery pack of the electric vehicle are both connected to the battery, so that the electric energy used by both is provided by the battery, which reduces the cost of ground equipment. And the specifications of the battery and the electric vehicle are consistent, so when the battery pack of the electric vehicle needs to be replaced, the battery on the ground equipment can be directly replaced on the electric vehicle as a spare part, so that a ground vehicle can provide multiple support capabilities, and a single ground vehicle can meet the needs of multiple tasks, thereby improving the support capabilities of ground equipment and reducing the support costs of electric vehicles.

[0106] In addition, the external charging module has a battery debugging interface, and the battery can be detachably connected to the battery debugging interface, so that the charging and discharging debugging can be performed through the external charging module to adjust the battery voltage to be consistent with the voltage of other battery packs on the electric vehicle to meet the needs of battery replacement.

[0107] In addition, a thermal management module is integrated into the ground support equipment, so that a piece of ground support equipment has thermal management capabilities in addition to charging and battery replacement, further improving the support capabilities of the ground support equipment and reducing the support costs of electric vehicles.

[0108] In addition, during the process of charging the electric vehicle, the thermal management module achieves immersion cooling of the charging module in the device cavity through an insulating heat exchange fluid, and can also immerse the battery cells in the battery pack, thereby providing thermal management functions for the battery pack and the charging module itself to support higher-power charging, thereby further improving the fast charging speed.

[0109] In addition, the thermal management module can also provide insulating heat exchange fluid to the control module and / or the electric drive module, etc., so as to ensure that the operating temperature of the control module and / or the electric drive module of the ground support equipment itself is within a suitable temperature environment.

[0110] In addition, the battery discharge circuit in the distribution box is equipped with a pre-charging branch formed by a pre-charging resistor, thereby realizing the pre-charging function and preventing surges during discharge and voltage imbalance between different batteries. BRIEF DESCRIPTION OF THE DRAWINGS

[0111] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0112] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0113] Figure 1 This is a flow chart of the first embodiment of the battery control method of the present application;

[0114] Figure 2 Schematic diagram of the power distribution box for the electric vehicle ground support equipment provided for this application;

[0115] Figure 3 A schematic diagram of the structure of the electric vehicle ground support equipment provided for this application;

[0116] Figure 4 A schematic diagram of the control module structure of the hardware operating environment involved in the battery control method in the embodiment of the present application;

[0117] Figure 5 A schematic diagram of the power supply for the electric vehicle ground support equipment provided for this application;

[0118] Figure 6 A connection diagram of an embodiment of an external charging module of an electric vehicle ground support equipment provided by the present application;

[0119] Figure 7A connection diagram of another embodiment of the external charging module of the electric vehicle ground support equipment provided by the present application;

[0120] Figure 8 A connection diagram of another embodiment of the external charging module of the electric vehicle ground support equipment provided by the present application;

[0121] Fig. 9 A schematic diagram of the parallel connection of the device heat exchange branch and the battery heat exchange branch provided in this application;

[0122] Fig.10 A control schematic diagram and a connection schematic diagram of each onboard device of the electric vehicle ground support equipment provided in this application;

[0123] Fig.11 A schematic diagram of the compartment layout of the electric vehicle ground support equipment provided for this application.

[0124] Description of Figure Numbers:

[0125] 01. Device heat exchange branch; 02. Battery heat exchange branch; 10. eVTOL; 10a. Battery cavity; 11. Battery cell; 12. First battery cavity hole; 13. Second battery cavity hole; 100. Movable vehicle; 110. Chassis; 120. Carriage; 121. Battery compartment; 122. External charging module compartment; 123. Battery access hole; 124. Charging gun access hole; 125. Battery debugging compartment; 1521. Battery debugging position; 130. Tow bar; 140. Slow charging interface; 150. Fast charging interface; 200. Electric energy drive module; 300. External charging module; 310. Charging pile body; 311. Device cavity; 3111. First device hole; 3112. Second device hole; 320, charging module; 330, thermal management module; 330a, first thermal management submodule; 330b, second thermal management submodule; 331, medium storage box; 3311, medium return pipe; 332, pump; 333, heat exchanger; 3331, medium pump outlet pipe; 341, gas storage device; 342, gas circuit valve; 350, charging gun; 361, first three-way pipe; 362, second three-way pipe; 400, battery; 500, distribution box; 510, charger; 520, DC bus; 530, supply and discharge circuit; 531, pre-charging resistor; 532, first positive contactor; 540, reserved interface circuit; 550, bidirectional DCDC; 600, control module.

[0126] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0127] It should be understood that the specific embodiments described herein are only used to explain the technical solutions of the present application and are not used to limit the present application.

[0128] In order to better understand the technical solution of the present application, a detailed description will be given below in conjunction with the accompanying drawings and specific implementation methods.

[0129] The main solution of the embodiment of the present application is: obtaining the total charge and discharge state parameters and external charge and discharge parameters of the battery pack; the battery pack includes multiple batteries connected in parallel, and the batteries are connected to the DC bus through a bidirectional DC converter DCDC; when the total charge and discharge state parameters do not match the external charge and discharge parameters, at least one target battery is selected from the battery pack, so that after the charge and discharge state parameters of the target battery are assigned to preset values, the recalculated total charge and discharge state parameters match the external charge and discharge parameters; wherein the preset value corresponds to the parameter type of the charge and discharge state parameters; through the bidirectional DCDC corresponding to the target battery, the target battery is controlled to charge and discharge based on the charge and discharge strategy corresponding to the preset value, and through the bidirectional DCDC corresponding to each remaining battery, each remaining battery is controlled to charge and discharge based on the charge and discharge balancing strategy, and the remaining batteries are batteries in the battery pack except the target battery.

[0130] In this embodiment, for the convenience of description, the following description is made by taking the electric vehicle ground support equipment as the execution subject.

[0131] With the popularization of electric vehicles that use electricity as the main power source, such as new energy vehicles, eVTOL (Electric Vertical Takeoff and Landing), and new energy ships, it is necessary to use batteries carried by ground support equipment such as ground support vehicles to charge electric vehicles.

[0132] In the related art, batteries are generally directly connected to the DC bus. If different types of batteries are to be connected in parallel, the charging and discharging voltages need to be matched. However, since different types of batteries use different voltage ranges, they cannot be directly connected in parallel, or the discharge capacity is affected after parallel connection. In addition, the batteries on the ground handling vehicle may include rechargeable batteries and / or non-rechargeable batteries, such as fuel cells among non-rechargeable batteries. Since the refueling speed of fuel cells is faster than the charging speed of rechargeable batteries, the ground handling vehicle can increase the attendance rate or attendance speed by using fuel cells, but the battery voltages between different rechargeable batteries and / or non-rechargeable batteries may be different.

[0133] Therefore, there is an urgent need for a battery control strategy that can maximize charge and discharge balance when the total charge and discharge state parameters of the battery pack do not match the external charge and discharge parameters such as the charging power of the charging pile or the load power.

[0134] To this end, the present application provides a solution, which uses a bidirectional DCDC (Direct Current Direct Current Converter) to adjust the voltage so that each battery can work normally. When the total charge and discharge state parameters of the battery pack do not match the external charge and discharge parameters such as the charging power of the charging pile or the load power, some batteries are independently controlled as target batteries, and the remaining batteries are controlled by a charge and discharge balancing strategy, thereby maximizing the charge and discharge balance between batteries with different battery voltages.

[0135] It should be noted that the execution subject of this embodiment may be a computing service device with data processing, network communication and program running functions, such as a tablet computer, a personal computer, a mobile phone, a vehicle terminal, etc., or an electronic device capable of realizing the above functions, an electric vehicle ground support equipment, etc. The following takes the electric vehicle ground support equipment as an example to illustrate this embodiment and the following embodiments.

[0136] Based on this, the present application embodiment provides a battery control method, referring to Figure 1 , Figure 1 This is a flow chart of the first embodiment of the battery control method of the present application.

[0137] In this embodiment, the battery control method includes steps S10 to S30:

[0138] Step S10, obtaining total charge and discharge state parameters and external charge and discharge parameters of the battery pack.

[0139] The battery pack includes a plurality of batteries connected in parallel, and the batteries are connected to a DC bus through a bidirectional DC converter DCDC.

[0140] It can be understood that the execution subject of this embodiment is the control module of the electric vehicle ground support equipment. Each battery in the battery pack has its own control system, for example, for rechargeable batteries, it has a BMS (Battery Management System, battery management system), and for fuel cells, it has an EMS (Energy Management System, energy management system).

[0141] See also Figure 2The electric vehicle ground handling vehicle is equipped with a distribution box 500, which includes multiple battery interfaces, multiple bidirectional DCDC550, a DC bus 520 and a charger 510. The charger 510 is connected to the slow charging interface of the electric vehicle ground handling vehicle; the number of multiple battery interfaces and multiple bidirectional DCDC550 is consistent and one-to-one corresponding, and each battery interface is connected to the DC bus 520 through the corresponding bidirectional DCDC550; one end of the DC bus 520 is connected to the charger 510, and the other end is configured as an output interface. The bidirectional DCDC550 can also be directly connected to the fast charging interface 150.

[0142] Among them, the battery interface is a terminal connected to the battery 400, which includes but is not limited to a physical interface and an electrical interface. The number of battery interfaces is determined according to the maximum number of batteries 400. The battery 400 and the corresponding battery interface can be connected using a quick-release structure to increase the speed of battery replacement. The charger 510 is an on-board charger arranged in the distribution box 500. In one embodiment, its power is less than or equal to 6.6KW. It is connected to the slow charging interface 140 to convert AC power into DC power, and then power each battery 400 through the bidirectional DCDC550.

[0143] The bidirectional DCDC550 can realize the bidirectional flow between DC power and DC power, that is, it can transmit DC power from one end to the other end, and can also transmit power in the reverse direction. In this way, batteries of different types or manufacturers are connected to the DC bus 520 through the bidirectional DCDC550, and the DC bus 520 is connected to various loads or charging piles, that is, the charging and discharging of batteries of different types or manufacturers are all carried out through the bidirectional DCDC550, so the voltage conversion of DCDC can adapt to batteries with different voltage ranges.

[0144] In this embodiment, the input voltage range of the bidirectional DCDC550 needs to be as wide as possible to adapt to different power supplies, such as 200~1500V. Similarly, the output voltage range needs to be matched according to the load voltage, such as 400~800V. In one example, the bidirectional DCDC550 is an isolated DCDC with an isolation voltage ≥2kV. In addition, the bidirectional DCDC550 is configured with a constant voltage output mode, a constant power output mode, a constant current output mode, a constant power input mode, a constant voltage input mode, and a constant current input mode.

[0145] The control module in this embodiment can be an all-in-one controller, which includes a power controller. The power controller is configured to control and distribute power to the distribution box. The power controller and each BMS, EMS and DCDC controller can be connected via CAN (Controller Area Network) line communication. Of course, other communication methods such as 485 communication can also be used. BMS, EMS, etc. upload battery status and alarm information to the power controller, and the DCDC controller uploads DCDC status and other information. At the same time, the PCS also controls the operation of each bidirectional DCDC550 and adjusts its voltage, power, current and other parameters in the form of communication commands. In addition, the all-in-one controller also includes a VCU (Vehicle Control Unit), which is connected to the power controller. The power controller receives data and commands from the VCU and reports data.

[0146] For the ith battery in the battery pack, the reported battery status includes but is not limited to: battery voltage , State of Charge , the battery capacity is recorded as , the allowable charging current is ,in, . M is the total number of batteries in the battery pack.

[0147] In this embodiment, the battery pack can be regarded as a virtual battery, that is, the battery status of all batteries is converted into the status of a virtual battery. The status of the virtual battery is the total charge and discharge status parameter. For example, the rated voltage of the virtual battery is equal to the voltage of the DC bus 520. , and the capacity of the virtual battery KWh corresponds to the total capacity KWh, expressed as , The capacity Ah of the virtual battery corresponds to the total capacity Ah, expressed as , ; The state of charge of the virtual battery corresponds to the total state of charge, expressed as , ; The allowable charging current of the virtual battery corresponds to the total allowable charging current, expressed as , .

[0148] The external charging and discharging parameters are the charging pile output current during charging and the load power during discharging. It is understandable that during charging, the power controller will also handshake and communicate with the charging pile control system to obtain the charging pile output current. During discharging (such as charging eVTOL), the power controller, as the charging pile control system, will also handshake and communicate with the load controller (such as the eVTOL control system) to obtain the load power.

[0149] Step S20, when the total charge and discharge state parameters do not match the external charge and discharge parameters, at least one target battery is selected from the battery pack so that after the charge and discharge state parameters of the target battery are assigned preset values, the recalculated total charge and discharge state parameters match the external charge and discharge parameters.

[0150] The preset value corresponds to the parameter type of the charge and discharge state parameter.

[0151] Step S30, controlling the target battery to charge and discharge based on a charge and discharge strategy corresponding to a preset value through the bidirectional DCDC corresponding to the target battery, and controlling the remaining batteries to charge and discharge based on a charge and discharge balancing strategy through the bidirectional DCDC corresponding to each remaining battery.

[0152] The remaining cells are cells other than the target cell in the battery pack.

[0153] It is understandable that during charging, the total charge and discharge state parameters do not match the external charge and discharge parameters, that is, the power of the charging pile is insufficient to balance all the rechargeable batteries. During discharge, the total charge and discharge state parameters do not match the external charge and discharge parameters, that is, when the non-rechargeable batteries and / or rechargeable batteries in the battery pack output at rated power, the total rated power of the battery pack is less than the load power, so that the battery pack is difficult to match the load requirements when discharging according to the balanced discharge strategy in the relevant technology.

[0154] In this regard, in this embodiment, some batteries can be selected from the battery pack, and then the charging state parameters of the batteries pre-acquired and stored in the power controller are directly assigned to the preset values. After the preset values ​​are assigned, the power controller can recalculate the total charging and discharging state parameters.

[0155] The number of the batteries in this part makes the recalculated total charge and discharge state parameters match the external charge and discharge parameters. Then the power controller controls the target battery to charge and discharge based on the charge and discharge strategy corresponding to the preset value, while the remaining batteries are still charged and discharged according to the charge and discharge balance strategy.

[0156] It is not difficult to see that in this embodiment, when the total charge and discharge state parameters of the battery pack do not match the external charge and discharge parameters such as the charging power of the charging pile or the load power, some batteries are independently controlled as target batteries, and the remaining batteries are controlled by the charge and discharge balance strategy, thereby maximizing the charge and discharge balance between batteries with different battery voltages.

[0157] The following is an explanation of the charging process and the discharging process:

[0158] In the charging process, the total charge and discharge state parameter is the first total allowable charging current of all rechargeable batteries, and the external charge and discharge parameter is the output current of the charging pile.

[0159] Specifically, after the electric vehicle ground support equipment is powered on, the control module first starts self-testing. If no fault occurs, it detects whether the charging gun is plugged in by detecting whether the charging gun CC1 and CC2 signals exist. When the charging gun is detected to be plugged in, the charging process begins. At this time, the power controller and the charging pile control system enter the handshake process and configure the charging pile to the constant voltage charging mode. The charging voltage is the output voltage of the DC bus, which can still be expressed as , the charging current is the maximum charging current allowed by the charging pile.

[0160] Since the connected rechargeable batteries may be of different voltages, capacities, and SOCs (State of Charge), the power controller will convert the information and status reported by different rechargeable batteries, calculate a total parameter, and then interact with the charging pile control system.

[0161] During the charging process, the BMS of the rechargeable battery reports the allowed charging current, and the power controller calculates the total allowed charging current as , .

[0162] when When the current is less than or equal to the output current of the charging pile, the charging pile is insufficient to balance charge all the rechargeable batteries so that all the batteries are eventually fully charged synchronously. Step S20 executed by the power controller specifically includes steps A25 to A28:

[0163] Step A25, when the total allowed charging current is greater than the output current of the charging pile, the rechargeable battery with the largest state of charge parameter among all the rechargeable batteries is marked as the first target battery.

[0164] Step A26, assigning the allowable charging current of the first target battery to 0.

[0165] Step A27, recalculating the first total allowable charging current of all rechargeable batteries to determine a first total current recalculation result.

[0166] Step A28, when the recalculated result of the first total current is greater than the output current of the charging pile, the rechargeable battery with the largest state of charge parameter among all rechargeable batteries whose allowed charging current is not 0 is marked as the first target battery.

[0167] Return to step A27 until the recalculated result of the first total current is less than or equal to the output current of the charging pile, so as to select at least one target battery from the battery pack.

[0168] Specifically, the power controller determines the rechargeable battery with the largest state of charge parameter from all the rechargeable batteries based on the state of charge parameters reported by each BMS, and directly assigns its corresponding allowable charging current to 0, that is, shuts down the battery branch where it is located to isolate the rechargeable battery from the battery pack.

[0169] It can be seen that in this embodiment, the preset value is 0. At this time, the rechargeable battery is marked as the first target battery. In one example, the rechargeable batteries in the battery pack are numbered from 1 to N (N ≤ M), among which the charge state parameter of the rechargeable battery numbered 3 is the largest, that is, = , at this time, let .

[0170] The power controller then recalculates , that is, the first total current recalculation result is obtained. Of course, the first total current recalculation result can still be used If If the state of charge is still greater than the output current of the charging pile, the power controller will determine the battery with the largest state of charge parameter from all the rechargeable batteries except the first target battery, and directly assign the corresponding allowable charging current to 0. Then the power controller will recalculate This cycle continues until the recalculated Less than or equal to the output current of the charging pile.

[0171] It can be seen that in this embodiment, When the current is greater than the output current of the charging pile, the corresponding charging battery with the largest state of charge parameter will be , so that The value of changes until Less than or equal to the output current of the charging pile.

[0172] Then the power controller executes step S30, which specifically includes the following steps A31 to A32:

[0173] Step A31 : for each remaining battery, based on the charging stage of the remaining battery, the remaining battery is charged at a corresponding stage through a corresponding bidirectional DCDC control.

[0174] It is understandable that after the electric vehicle ground support equipment is started, it will first disconnect the contactor or relay of the circuit structure such as the distribution box to avoid accidents caused by accidental startup of various on-board equipment. Therefore, for the first target battery, the power controller does not act on it, that is, the contactor of the battery branch where the first target battery is located is not turned on, so that the first target battery is isolated.

[0175] For the remaining batteries that are not marked as the first target batteries among all the rechargeable batteries, the power controller determines the charging stage they are in based on the state parameters reported by them.

[0176] It should be noted that constant current charging and constant voltage charging are two indispensable stages in the charging process of rechargeable batteries. In the constant current stage, the battery power is quickly replenished with a constant current until the battery voltage reaches the preset voltage value or the battery power is close to full. In this stage, the charging current remains unchanged, the battery voltage gradually rises, and the rechargeable battery absorbs electrical energy at a faster rate. In the constant voltage stage, when the battery voltage reaches the preset constant voltage charging voltage, it automatically switches from the constant current charging stage to the constant voltage stage, ensuring that the battery is fully charged and avoiding overcharging by maintaining a constant charging voltage. In this stage, the charging voltage is constant, and the charging current gradually decreases as the battery power increases to ensure that the rechargeable battery will not be damaged by overcharging when it is fully charged.

[0177] Thus, for the rechargeable battery in the constant current charging stage among the remaining batteries, the power controller controls the bidirectional DCDC550 connected to the rechargeable battery to switch to the constant current input mode, and the input current is configured as For a rechargeable battery in the constant voltage charging stage, the power controller controls the bidirectional DCDC550 connected to the rechargeable battery to switch to the constant voltage charging input mode, and configures the input voltage to .

[0178] Step A32: when it is detected that the cycle condition is triggered, updating the allowed charging current of the first target battery based on the actual allowed charging current of the first target battery.

[0179] Return to step A27 until the voltage of each rechargeable battery rises to the charging cut-off voltage.

[0180] Of course, it is understandable that as charging progresses, the charging stage of the rechargeable battery changes. For example, some rechargeable batteries in the constant current stage enter the constant voltage charging stage after charging, and their allowed charging current becomes smaller, which will cause the total allowed charging current of the battery pack to change. At this time, the specific charging process can be adaptively adjusted according to this change.

[0181] Specifically, in this embodiment, when the power controller detects that the cycle condition is triggered, it will update the specific value of the allowable charging current assigned to 0 to its actual allowable charging current.

[0182] Among them, the cycle condition may be that the charging time reaches a preset time, that is, the power controller periodically removes the mark of the first target battery and cancels the assignment of its allowable charging current, and then recalculates the total allowable charging current based on the actual allowable charging current, obtains the first total current recalculation result, and then enters the next cycle and executes the above steps again.

[0183] Alternatively, since the BMS of each rechargeable battery will continuously report the battery status, the cycle condition can also be to monitor that the voltage of at least one remaining battery rises to the constant voltage charging voltage. At this time, the total allowable charging current of the battery pack will obviously change, so the power controller can remove the mark of the first target battery and cancel the assignment of its allowable charging current, and then recalculate the total allowable charging current based on the actual allowable charging current to obtain the first total current recalculation result. Obviously, in this process, the battery branch where the rechargeable battery previously marked as the first target battery is located will be turned on, so that charging will begin.

[0184] It is not difficult to see that in this embodiment, when the output current of the charging pile is not sufficient to charge all the rechargeable batteries evenly, the rechargeable batteries with larger charge state parameters, that is, more battery remaining power, are first eliminated, and the rechargeable batteries with smaller charge state parameters, that is, less battery remaining power, are then eliminated. During the charging process, the rechargeable batteries that have been eliminated before are continuously turned on and charged, so that all the rechargeable batteries are finally charged as synchronously as possible.

[0185] In addition, although the charging speed in the constant voltage stage is slower, if some of the rechargeable batteries in the constant voltage stage are not marked as the first target batteries and are charged, some of the rechargeable batteries in the constant voltage stage may be fully charged first. To this end, in another embodiment, the power controller performs steps A21 to A24:

[0186] Step A21: When the total allowed charging current is greater than the output current of the charging pile, the allowed charging currents of all rechargeable batteries in the constant voltage stage are assigned a value of 0.

[0187] Step A22: recalculate the total allowable charging current of all rechargeable batteries to determine a second total current recalculation result.

[0188] Step A23: When the recalculated result of the second total current is less than or equal to the output current of the charging pile, the corresponding bidirectional DCDC is used to control the constant current charging of each rechargeable battery in the constant current stage.

[0189] Step A24: When it is detected that all rechargeable batteries are in the constant voltage stage, each rechargeable battery is controlled to perform constant voltage charging through the corresponding bidirectional DCDC until the voltage of all rechargeable batteries rises to the charging cut-off voltage.

[0190] When the recalculated second total current is greater than the output current of the charging pile, step A25 is executed.

[0191] Specifically, in this embodiment, If the current is greater than the output current of the charging pile, the allowable charging current of all rechargeable batteries in the constant voltage stage will be assigned to 0 first, and the total allowable charging current of all rechargeable batteries will be recalculated. If the output current of the charging pile is less than or equal to the output current of the charging pile, then the output current of the charging pile is sufficient, so that the rechargeable battery in the constant current stage can be charged first, that is, the bidirectional DCDC550 connected to each rechargeable battery in the constant current stage is configured as a constant current input mode, and the input current is configured as the corresponding Until all rechargeable batteries enter the constant voltage stage, and then all rechargeable batteries are charged at a constant voltage, that is, the bidirectional DCDC550 connected to each rechargeable battery is configured to the constant voltage input mode, and the output voltage is configured to the corresponding .

[0192] It is not difficult to see that in this embodiment, when the output current of the charging pile is insufficient, the rechargeable batteries in the constant current stage are charged first. After all the rechargeable batteries are in the constant voltage stage, all the rechargeable batteries are charged at a constant voltage, thereby ensuring that all the rechargeable batteries are fully charged synchronously.

[0193] Of course, if all the rechargeable batteries in the constant voltage stage are removed, If the output current of the charging pile is still greater than the output current of the charging pile, then the output current of the charging pile is still insufficient, and the charging process provided by the aforementioned implementation method can be executed, that is, the rechargeable batteries with larger charge state parameters, that is, more remaining battery power, are first eliminated.

[0194] It should be noted that only rechargeable batteries need to be charged. During the above charging process, if the battery pack includes multiple non-rechargeable batteries, the contactor or relay of the non-rechargeable batteries needs to be disconnected, the corresponding bidirectional DCDC550 stops working, and the corresponding allowed charging current is 0.

[0195] In the discharge process, the external charge and discharge parameter is the load power. It can be understood that the battery pack may include a plurality of rechargeable batteries, or the battery pack may include a plurality of rechargeable batteries and a plurality of non-rechargeable batteries, or the battery pack may also include a plurality of non-rechargeable batteries.

[0196] When the charging gun insertion signal is not detected, the discharge process is entered. In one embodiment, a battery pack including multiple rechargeable batteries and multiple non-rechargeable batteries is used as an example for explanation. It should be noted that the non-rechargeable battery includes a disposable battery such as an alkaline battery or a fuel cell. In this embodiment, the non-rechargeable battery is a fuel cell.

[0197] At this time, step S20 performed by the power controller specifically includes the following steps B21 to B26:

[0198] Step B21: Among all the rechargeable batteries, the rechargeable battery with the largest remaining capacity is used as the first main battery.

[0199] The power controller can calculate the remaining capacity of each rechargeable battery based on the battery status reported by each rechargeable battery. The remaining capacity of the i-th rechargeable battery can be expressed as The power amplifier then uses the rechargeable battery with the largest remaining capacity as the first main battery. The power controller calculates the first total maximum power of all non-rechargeable batteries:

[0200] ;

[0201] in, is the total maximum power, is the maximum power of the i-th non-rechargeable battery, where the N+1th to M-th batteries are non-rechargeable batteries and the 1st to Nth batteries are rechargeable batteries.

[0202] Step B22: When the first total maximum power of all non-rechargeable batteries is greater than or equal to the load power, determine whether the first total rated power of the battery pack is less than the load power.

[0203] The first total rated power is the sum of the rated powers of the first main battery and all non-rechargeable batteries.

[0204] Since fuel cells can be refueled significantly faster, priority is given to releasing the power of the fuel cell during discharge. The power controller calculates ,judge ≥ Is it established? Among them, is the load power.

[0205] like ≥ The output power of the non-rechargeable battery alone can meet the load requirement.

[0206] Of course, for non-rechargeable batteries such as fuel cells, their efficiency is highest when they work at rated power, so the output power of the non-rechargeable battery should be controlled near the rated power as much as possible. To this end, the power controller will continue to determine whether the sum of the rated powers of the first main battery and all non-rechargeable batteries meets the load power.

[0207] Specifically, the power controller calculates the sum of the rated powers of the first main battery and all non-rechargeable batteries:

[0208] ;

[0209] in, is the first total rated power, is the rated power of the first main battery, is the rated power of the i-th non-rechargeable battery.

[0210] The power controller then determines ≥ Is it true?

[0211] Step B23, when the first total rated power is less than the load power, mark the non-rechargeable battery with the smallest maximum power among all the non-rechargeable batteries as the second target battery.

[0212] Step B24, assigning the rated power of the second target battery to the maximum power corresponding to the second target battery.

[0213] exist ≥ When it is not true, all fuel cells cannot meet the load requirements when operating at rated power. At this time, the power controller marks the non-rechargeable battery with the smallest maximum power among all non-rechargeable batteries as the second target battery. Then the rated power of the second target battery is assigned to its maximum power, that is, when the i-th non-rechargeable battery is marked as the second target battery, let .

[0214] Step B25, recalculate the first total rated power to obtain a recalculated result of the first total power.

[0215] Step B26, when the recalculated result of the first total power is less than the load power, the non-rechargeable battery with the smallest maximum power among all non-rechargeable batteries except the second target battery is marked as the second target battery.

[0216] Return to step B24 until the recalculated result of the first total power is greater than or equal to the load power.

[0217] After changing the rated power of the first target battery, the power controller recalculates . It can be seen that at this time It is actually the sum of the rated power of the first main battery, the maximum power of the second target battery and the rated powers of the remaining non-rechargeable batteries.

[0218] like ≥ If it still does not hold, then the non-rechargeable battery with the smallest maximum power among all non-rechargeable batteries not marked as the second target battery is marked as the second target battery. Of course, it can be understood that the non-rechargeable battery with the smallest maximum power is actually the non-rechargeable battery with the second smallest maximum power among all non-rechargeable batteries.

[0219] In this way, the power controller sequentially assigns the rated power of the non-rechargeable battery with the lowest maximum power ranking to its maximum power until the recalculated ≥ Established.

[0220] At this time, the power controller executes step S30, which specifically includes step B31:

[0221] Step B31, controlling the first main battery to perform constant voltage discharge according to the DC bus voltage through the corresponding bidirectional DCDC, and controlling each second target battery to perform constant power discharge based on the corresponding maximum power through the corresponding bidirectional DCDC.

[0222] Specifically, the power controller controls the bidirectional DCDC550 connected to the first main battery to enter the constant voltage output mode, and the output voltage is configured as Since all bidirectional DCDC550s are connected in parallel to the DC bus, the output voltage of the first main battery This will make the output voltage of all bidirectional DCDC550 .

[0223] The power controller controls the bidirectional DCDC 550 connected to each second target battery to enter a constant power output mode, and the non-rechargeable battery outputs at a maximum power.

[0224] For the remaining non-rechargeable batteries that are not marked as the second target batteries, the power controller may control each of the connected bidirectional DCDC 550 to enter the constant power mode, and the non-rechargeable batteries output at the corresponding rated power.

[0225] Alternatively, in one embodiment, for the remaining non-rechargeable batteries that are not marked as the second target batteries, the power controller performs the following steps B32 to B35:

[0226] Step B32: for any remaining non-rechargeable battery except the second target battery, determine a target non-rechargeable battery ranked before the remaining non-rechargeable battery from the first battery sequence.

[0227] The first battery sequence includes all non-rechargeable batteries and the first main battery, and all second target batteries are sequenced before all remaining non-rechargeable batteries, and the first main battery is sequenced after all non-rechargeable batteries.

[0228] Step B33: for any remaining non-rechargeable battery except the second target battery, determine a first reference total power of the remaining non-rechargeable battery.

[0229] The first reference total power is the sum of the rated powers of all batteries in the first battery sequence except the target non-rechargeable battery.

[0230] Step B34: for any remaining non-rechargeable battery except the second target battery, determine the first output power from the first load power to be allocated.

[0231] The first load power to be allocated is the part of the load power except the maximum power of all target non-rechargeable batteries, and the ratio of the first output power to the first load power to be allocated is equal to the ratio of the rated power of the remaining non-rechargeable batteries to the first reference total power.

[0232] Step B35, controlling each remaining non-rechargeable battery to output constant power at the corresponding first output power through the corresponding bidirectional DCDC.

[0233] As mentioned above, the battery pack includes non-rechargeable batteries numbered from N+1 to M. At this time, after the first main battery and the second target battery are determined, a first battery sequence can be reconstructed.

[0234] The first battery sequence is {1, ..., k, k+1, ..., m-1, m}, wherein the 1st to kth batteries are second target batteries, the k+1st to m-1th batteries are remaining non-rechargeable batteries, and the mth battery is the first main battery. In this way, all second target batteries are ranked before all remaining non-rechargeable batteries, and the first main battery is ranked after all non-rechargeable batteries.

[0235] For the nth battery in the first battery sequence, where, ; Its first output power is:

[0236] ;

[0237] in, is the first output power of the nth battery, is the rated power of the nth battery, is the rated power of the jth battery, is the maximum power of the jth battery, and .

[0238] It is not difficult to see that for the nth battery, its target non-rechargeable batteries are the j=1 to j=n-1 batteries in {1, ..., k, k+1, ..., m-1, m}. That is, the first load power to be allocated of the nth battery. is the first reference total power of the nth battery.

[0239] Of course, it can be clearly seen from this that the ratio of the first output power to the first load power to be distributed is equal to the ratio of the rated power thereof to the first reference total power.

[0240] It is not difficult to see that this embodiment provides a discharge balancing method in a discharge process, and also makes the output power of each non-rechargeable battery not exceed its maximum power as much as possible.

[0241] Of course, the power controller can also perform steps B27-B28:

[0242] B27. When the first total rated power is greater than or equal to the load power, determine the second output power of the non-rechargeable battery for each non-rechargeable battery.

[0243] The ratio of the second output power to the corresponding rated power is equal to the ratio of the load power to the first total rated power.

[0244] B28. Control each non-rechargeable battery to output constant power at the corresponding second output power through the corresponding bidirectional DCDC.

[0245] Specifically, in ≥ When it is established, the second output power of the i-th non-rechargeable battery is determined:

[0246] ;

[0247] in, is the second output power of the i-th non-rechargeable battery, is the rated power of the i-th non-rechargeable battery, and N+1≤i≤M.

[0248] Then the power controller controls each non-rechargeable battery connected bidirectional DCDC550 to enter the constant power output mode, and controls the non-rechargeable battery to Provides constant power output.

[0249] It is not difficult to see that, in this embodiment, each non-rechargeable battery is discharged evenly as close to the rated power as possible.

[0250] In addition, since the battery pack contains both non-rechargeable and rechargeable batteries, < At this time, the power controller also needs to calculate the total maximum power of all rechargeable batteries :

[0251] ;

[0252] The power controller then determines + ≥ Is it established? + ≥ If the rechargeable battery and the non-rechargeable battery are both required to output electrical energy, + ≥ If not, the power controller will report a reminder message to remind the control module to limit the power output of the vehicle-mounted equipment and other loads, thereby + ≥ Established.

[0253] At this time, the power controller needs to perform the following steps S40~S80:

[0254] Step S40, when the first total maximum power of all non-rechargeable batteries is less than the load power, and the second total maximum power of all rechargeable batteries and all non-rechargeable batteries is greater than or equal to the load power, all remaining rechargeable batteries except the first main battery among all rechargeable batteries are sorted from large to small according to the remaining capacity to obtain a remaining rechargeable battery sequence.

[0255] Step S50: for any remaining rechargeable battery in the sequence of remaining rechargeable batteries, determine all target rechargeable batteries that are ranked before the remaining rechargeable battery.

[0256] Step S60: determining a reference total remaining capacity of any remaining rechargeable battery in the remaining rechargeable battery sequence.

[0257] The reference total remaining capacity is the sum of the remaining capacities of all rechargeable batteries except all target rechargeable batteries in the remaining rechargeable battery sequence and the remaining capacity of the first main battery.

[0258] Step S70: for any remaining rechargeable battery in the remaining rechargeable battery sequence, determine a third output power from the second load power to be allocated.

[0259] The ratio of the third output power to the second load power to be allocated is equal to the ratio of the corresponding remaining capacity to the reference total remaining capacity; the second load power to be allocated is the part of the load power excluding the first total maximum power and the maximum power of all target rechargeable batteries.

[0260] Specifically, in < and + ≥ When it is established, the power controller reorders all the remaining rechargeable batteries except the first main battery in all the rechargeable batteries according to the battery status reported by each BMS from large to small according to the remaining capacity to obtain the remaining rechargeable battery sequence D (y). Since the battery pack includes a total of N rechargeable batteries, but the remaining rechargeable battery sequence D (y) does not include the first main battery, therefore, 1≤y≤N-1.

[0261] For the yth remaining rechargeable battery in the remaining rechargeable battery sequence D(y), determine the corresponding third output power:

[0262] ;

[0263] in, is the third output power of the yth remaining charged battery in the remaining charged battery sequence D(y), is the maximum power of the zth remaining charged battery in the remaining charged battery sequence D(y), is the remaining capacity of the yth remaining charged battery, is the remaining capacity of the zth remaining charged battery, is the remaining capacity of the first main battery, is the reference total remaining capacity of the yth remaining charged battery; is the second power to be allocated of the yth remaining charged battery.

[0264] It is not difficult to see that the ratio of the third output power to the second load power to be allocated is equal to the ratio of the corresponding remaining capacity to the reference total remaining capacity.

[0265] Step S80, controlling the first main battery to perform constant voltage discharge according to the DC bus voltage through the corresponding bidirectional DCDC, controlling each non-rechargeable battery to perform constant power discharge based on the corresponding maximum power through the corresponding bidirectional DCDC, and for any remaining rechargeable battery in the remaining rechargeable battery sequence, when the third output power is greater than or equal to the corresponding maximum power, controlling the remaining rechargeable battery to perform constant power output at the corresponding maximum power through the corresponding bidirectional DCDC; and controlling the remaining rechargeable battery to perform constant power output at the third output power through the corresponding bidirectional DCDC when the third output power is less than the corresponding maximum power.

[0266] Of course, in order to prevent the third output power from exceeding the maximum power of the remaining rechargeable battery, it is also necessary to determine ≥ Is it established? The maximum power corresponding to the remaining charged battery.

[0267] like ≥ , the power controller controls the corresponding bidirectional DCDC550 to switch to the constant power output mode so that the remaining charged battery can output at the maximum power.

[0268] like < , the power controller controls the corresponding bidirectional DCDC550 to switch to the constant power output mode so that the remaining charged battery outputs the third power Output.

[0269] At the same time, the power controller controls the bidirectional DCDC550 connected to the first main battery to switch to constant voltage output mode and use the DC bus voltage The power controller controls the bidirectional DCDC550 connected to each non-rechargeable battery to switch to a constant power output mode so that each non-rechargeable battery can output at maximum power.

[0270] It is not difficult to see that in this embodiment, by using the situation that there are both non-rechargeable batteries and rechargeable batteries in the battery pack, power allocation is performed by comprehensively considering the maximum power and remaining capacity of different batteries, and rechargeable batteries of different SOCs are discharged synchronously to the lowest value as much as possible, while the output power of each non-rechargeable battery does not exceed its maximum power.

[0271] In addition, for electric vehicle ground support equipment, there is also a situation where all rechargeable batteries are unavailable in extreme protection conditions. At this time, only multiple non-rechargeable batteries are connected in the battery pack. The total charge and discharge state parameter is the second total rated power of all non-rechargeable batteries, and the external charge and discharge parameter is the load power. The following takes the non-rechargeable battery as a fuel cell as an example for explanation.

[0272] At this time, in one embodiment, when the power controller executes step S20, the following steps C21 to C26 are specifically included:

[0273] Step C21, when the second total rated power is less than the load power, the non-rechargeable battery with the largest rated power among all non-rechargeable batteries is marked as the second main battery, and the non-rechargeable batteries other than the second main battery are marked as pending batteries.

[0274] Step C22: Mark the undetermined battery with the smallest maximum power as the third target battery.

[0275] Step C23, assigning the rated power of the third target battery to the maximum power corresponding to the third target battery.

[0276] Step C24, recalculating the second total rated power of all non-rechargeable batteries to obtain a recalculated second total power result.

[0277] Step C25, when the recalculated result of the second total power is less than the load power, among all the remaining batteries to be determined except the third target battery, the remaining battery to be determined with the smallest maximum power is marked as the third target battery.

[0278] Return to step C23 until the second total power is recalculated to be greater than or equal to the load power.

[0279] Step C26: for any remaining undetermined battery except the third target battery, determine the third output power based on a preset charge and discharge balancing strategy.

[0280] Specifically, the power controller can obtain the rated power and maximum power of each non-rechargeable battery according to the battery status of the non-rechargeable battery reported by each EMS. The power amplifier can use the non-rechargeable battery with the largest rated power and / or maximum power as the second main battery. The power amplifier can also calculate the second total rated power of all non-rechargeable batteries:

[0281] ;

[0282] in, is the second total rated power, is the rated power of the i-th non-rechargeable battery, wherein the N+1-M-th batteries in the battery pack are non-rechargeable batteries, that is, N+1≤i≤M.

[0283] exist < When all fuel cells work at rated power, they cannot meet the load requirements. At this time, the power controller marks the fuel cell with the smallest maximum power among all fuel cells as the third target cell. Then the rated power of the third target cell is assigned to its maximum power, that is, when the i-th fuel cell is marked as the third target cell, let .

[0284] After changing the rated power of the third target battery, the power controller recalculates . It can be seen that at this time It is actually the sum of the maximum power of the third target battery and the rated powers of the remaining fuel cells.

[0285] like ≥ If it still does not hold, then the fuel cell with the smallest maximum power among all fuel cells not marked as the third target cell, that is, among all the pending cells, is marked as the third target cell. Of course, it can be understood that at this time, the non-rechargeable battery with the smallest maximum power is actually the non-rechargeable battery with the second smallest maximum power among all non-rechargeable batteries.

[0286] In this way, the power controller sequentially assigns the rated power of the fuel cell with the lowest maximum power ranking to its maximum power until the recalculated maximum power is ≥ .

[0287] At this time, the power controller executes step S30 specifically as follows: controlling the second main battery to perform constant voltage discharge at the DC bus voltage through the corresponding bidirectional DCDC, controlling each third target battery to perform constant power discharge at the corresponding maximum power through the corresponding bidirectional DCDC, and controlling any undetermined battery except the third target battery to perform constant power discharge at the corresponding third output power through the corresponding bidirectional DCDC.

[0288] Specifically, the power controller controls the bidirectional DCDC550 connected to the second main battery to enter the constant voltage output mode, and the output voltage is configured as Since all bidirectional DCDC550s are connected in parallel to the DC bus, the output voltage of the second main battery This will make the output voltage of all bidirectional DCDC550 .

[0289] The power controller controls the bidirectional DCDC 550 connected to each third target battery to enter a constant power output mode and output at a maximum power.

[0290] For the fuel cells that are not marked as the third target cells, the power controller may control each of the connected bidirectional DCDC 550 to enter the constant power mode, and the fuel cells output at the corresponding rated power.

[0291] In one feasible implementation, step C26 specifically includes:

[0292] Step C261, determining a target battery to be determined that is ranked before the remaining batteries to be determined from the second battery sequence.

[0293] The second battery sequence includes all non-rechargeable batteries, and all third target batteries are sequenced before all remaining pending batteries, with the second main battery sequenced at the very end.

[0294] Step C262, determining a second reference total power of the battery to be determined.

[0295] The second reference total power is the sum of the rated powers of all batteries in the second battery sequence except the target battery to be determined.

[0296] Step C263, determining a fourth output power from the third load power to be allocated.

[0297] Among them, the third load power to be allocated is the part of the load power excluding the maximum power of all third target batteries and the maximum power of the target battery to be determined; and the ratio of the fourth output power to the third load power to be allocated is equal to the ratio of the rated power of the remaining batteries to be determined to the second reference total power.

[0298] Specifically, as mentioned above, the battery group includes fuel cells numbered from N+1 to M. Now, after the second main battery and the third target battery are determined, a second battery sequence can be reconstructed.

[0299] The second battery sequence is {1, ..., k', k'+1, ..., m'-1, m'}; wherein the 1st to k'th batteries are the third target batteries, the k'+1st to m'-1th batteries are the remaining pending batteries that are not marked as the third target batteries, and the m'th battery is the third main battery. In this way, all third target batteries are sorted before all remaining pending batteries, and the second main battery is sorted after all pending batteries, i.e., at the very end of the sequence.

[0300] For the n'th battery in the second battery sequence, where, ; Its fourth output power is:

[0301] ;

[0302] in, is the fourth output power of the n'th battery, is the rated power of the n'th battery, is the rated power of the j'th battery, is the maximum power of the j'th battery, and .

[0303] It is not difficult to see that for the n'th battery, its target batteries are the j'=1' to j'=n'-1 batteries in {1', ..., k', k'+1, ..., m'-1, m'}. That is, the third load power to be distributed of the n'th battery. is the second reference total power of the n'th battery.

[0304] It is not difficult to see that this embodiment provides a discharge equalization method for a non-rechargeable battery pack, and also makes the output power of each non-rechargeable battery as efficient as possible without exceeding its maximum power, that is, outputting close to the rated power.

[0305] Of course, the power controller can also perform steps C27~C28:

[0306] Step C27, when the second total rated power is greater than or equal to the load power, the non-rechargeable battery with the largest rated power among all the non-rechargeable batteries is marked as the first main battery, and the batteries other than the first main battery are marked as the first auxiliary batteries.

[0307] Step C28, controlling the first main battery to discharge at a constant voltage with the DC bus voltage through the corresponding bidirectional DCDC, and controlling each first sub-battery to discharge at a constant power according to the corresponding fifth output power through the corresponding bidirectional DCDC.

[0308] The ratio of the fifth output power of any first subsidiary battery to the load power is equal to the ratio of the rated power of any first subsidiary battery to the second total rated power.

[0309] Specifically, in ≥ When it is established, the non-rechargeable battery with the largest rated power among all the non-rechargeable batteries is directly marked as the first main battery, and the batteries except the first main battery are marked as the first sub-batteries.

[0310] The fifth output power of any first sub-battery is:

[0311] ;

[0312] in, is the fifth output power of the i-th first secondary battery, is the rated power of the i-th first secondary battery, and N+1≤i≤M.

[0313] The power controller then controls the bidirectional DCDC550 connected to the third main battery to switch to constant voltage output mode with the DC bus voltage Output, each first battery connected bidirectional DCDC550 enters the constant power output mode, and Provides constant power output.

[0314] It is not difficult to see that in this embodiment, all non-rechargeable batteries are discharged evenly at a power as close to the rated power as possible, that is, at the highest efficiency.

[0315] Also, see Figure 3 The present application provides an electric vehicle ground support equipment, which includes a movable vehicle 100, a DC bus 520 and a battery pack. The DC bus 520 and the battery pack are both arranged on the movable vehicle 100. The battery pack includes a plurality of batteries 400 connected in parallel. The battery 400 is connected to the DC bus 520 via a bidirectional DC converter DCDC.

[0316] The electric vehicle ground support equipment further includes a control module, which is disposed on the movable vehicle 100 . The control module is respectively connected to each battery 400 and each bidirectional DCDC 550 for communication.

[0317] See also Figure 4The control module includes at least one processor; and a memory connected to the at least one processor in communication; wherein the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by the at least one processor so that the at least one processor can execute the battery control method in the above embodiment.

[0318] Specifically, the electric vehicle may be a new energy vehicle, a battery vehicle, a drone, an eVTOL 10, a new energy ship, etc. The following description will be made by taking the electric vehicle as an example of an eVTOL 10.

[0319] It is understandable that the eVTOL 10 has at least one battery pack. The battery pack can provide power to the power unit of the eVTOL 10, or can also provide power to airborne systems such as an airborne environmental control system and an airborne lighting system. The battery pack includes a module housing having a battery cavity and a battery cell group installed in the battery cavity. Figure 7 In a feasible embodiment, the module shell has a first battery cavity hole 12 and a second battery cavity hole 13 connected to the battery cavity 10a, wherein the first battery cavity hole 12 is for the insulated heat exchange fluid to flow in, and the second battery cavity hole 13 is for the insulated heat exchange fluid to flow out. And the first battery cavity hole 12 and the second battery cavity hole 13 are both arranged on the upper part of the top wall or the side wall of the module shell. In addition, the module shell is a shell structure with a sealing design, so that the battery cavity 10a inside it can be used to fill the insulating heat exchange fluid. When the battery cavity 10a is filled with the insulating heat exchange fluid, the insulating heat exchange fluid can completely submerge the battery cell group, thereby contacting the battery cell 11 of the battery cell group for heat exchange, so as to transfer the heat of the battery cell 11 to the module shell, and heat exchange occurs between the module shell and the external environment, which is conducive to improving the heat dissipation efficiency of the battery cell 11. In addition, the eVTOL 10 also has a machine-end interface, which includes a machine-end medium inlet hole connected to the first battery cavity hole 12, and a machine-end medium outlet hole connected to the second battery cavity hole 13. Of course, the machine-side interface can be integrated into the charging socket on the eVTOL that cooperates with the charging gun, so as to avoid significantly increasing the weight of the eVTOL and avoiding wasting the body space of the eVTOL.

[0320] The movable vehicle 100 is a machine or equipment that has mobility and can be used to transport equipment and / or personnel. It is understandable that the mobility includes but is not limited to ground mobility, air mobility, water mobility, and underwater mobility. Therefore, the movable vehicle 100 includes but is not limited to vehicles, ships, and aircraft. The following description takes the movable vehicle 100 as a vehicle, that is, the electric vehicle ground handling equipment is a ground handling vehicle as an example.

[0321] Reference below Figure 4, which shows a schematic diagram of the structure of a control module suitable for implementing the embodiment of the present application. The control module in the embodiment of the present application may include but is not limited to mobile terminals such as mobile phones, laptop computers, digital broadcast receivers, PDAs (Personal Digital Assistants), PADs (Portable Application Descriptions: tablet computers), PMPs (Portable Media Players: portable multimedia players), vehicle-mounted terminals (such as vehicle-mounted navigation terminals), etc., and fixed terminals such as digital TVs, desktop computers, etc. Figure 4 The control module shown is merely an example and should not bring any limitation to the functions and scope of use of the embodiments of the present application.

[0322] like Figure 4 As shown, the control module may include a processing device 1001 (such as a central processing unit, a graphics processor, etc.), which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM: Read Only Memory) 1002 or a program loaded from a storage device 1003 to a random access memory (RAM: Random Access Memory) 1004. In RAM1004, various programs and data required for the operation of the control module are also stored. The processing device 1001, ROM1002 and RAM1004 are connected to each other through a bus 1005. An input / output (I / O) interface 1006 is also connected to the bus. Generally, the following systems can be connected to the I / O interface 1006: an input device 1007 including, for example, a touch screen, a touch pad, a keyboard, a mouse, an image sensor, a microphone, an accelerometer, a gyroscope, etc.; an output device 1008 including, for example, a liquid crystal display (LCD: Liquid Crystal Display), a speaker, a vibrator, etc.; a storage device 1003 including, for example, a magnetic tape, a hard disk, etc.; and a communication device 1009. The communication device 1009 can allow the control module to communicate with other devices wirelessly or wired to exchange data. Although the control module with various systems is shown in the figure, it should be understood that it is not required to implement or have all the systems shown. More or fewer systems can be implemented or have alternatively.

[0323] In particular, according to the embodiments disclosed in the present application, the process described above with reference to the flowchart can be implemented as a computer software program. For example, the embodiments disclosed in the present application include a computer program product, which includes a computer program carried on a computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from the network through a communication device, or installed from the storage device 1003, or installed from the ROM 1002. When the computer program is executed by the processing device 1001, the above-mentioned functions defined in the battery control method of the embodiment disclosed in the present application are executed.

[0324] The control module provided by the present application adopts the battery control method in the above embodiment, which can solve the technical problem in the related technology that a battery control strategy that can maximize the realization of charge and discharge balance when the total charge and discharge state parameters of the battery pack do not match the external charge and discharge parameters such as the charging power of the charging pile or the load power is urgently needed. Compared with the prior art, the beneficial effects of the control module provided by the present application are the same as the beneficial effects of the battery control method provided by the above embodiment, and the other technical features in the control module are the same as the features disclosed in the method of the previous embodiment, which will not be repeated here.

[0325] It should be understood that the various parts disclosed in this application can be implemented by hardware, software, firmware or a combination thereof. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.

[0326] In one embodiment, a parallel power supply and discharge main circuit and a pre-charge branch circuit are arranged between the battery and the bidirectional DCDC550. The power supply and discharge main circuit includes a first contactor and a fuse, and the pre-charge branch circuit includes a pre-charge resistor and a second contactor connected in series. The second contactor is used to turn on or off the pre-charge branch circuit.

[0327] Specifically, see Figure 2 The movable vehicle 100 is equipped with a distribution box 500, which includes multiple battery interfaces, multiple bidirectional DCDC550, a DC bus 520 and a charger 510. The charger 510 is connected to the slow charging interface of the electric vehicle ground handling vehicle; the number of multiple battery interfaces and multiple bidirectional DCDC550 is consistent and one-to-one corresponding, and each battery interface is connected to the DC bus 520 through the corresponding bidirectional DCDC550; one end of the DC bus 520 is connected to the charger 510, and the other end is configured as an output interface. The bidirectional DCDC550 can also be directly connected to the fast charging interface 150.

[0328] Among them, the battery interface is a terminal connected to the battery 400, which includes but is not limited to a physical interface and an electrical interface. The number of battery interfaces is determined according to the number of batteries 400. And optionally, the battery 400 and the corresponding battery interface can be connected using a quick-release structure to increase the speed of battery replacement. The charger 510 is an on-board charger arranged in the distribution box 500. In one embodiment, its power is less than or equal to 6.6KW. It is connected to the slow charging interface 140 to convert AC power into DC power, and then power each battery 400 through the bidirectional DCDC550.

[0329] The bidirectional DCDC550 can realize the bidirectional flow between DC power and DC power, that is, it can transmit DC power from one end to the other end, and can also transmit power in the reverse direction. In this way, batteries of different types or manufacturers are connected to the DC bus 520 through the bidirectional DCDC550, and the DC bus 520 is connected to various loads or charging piles, that is, the charging and discharging of batteries of different types or manufacturers are all carried out through the bidirectional DCDC550, so the voltage conversion of DCDC can adapt to batteries with different voltage ranges.

[0330] The fast charging interface 150 is an interface provided on the mobile vehicle 100 that supports fast charging technology. It allows the ground vehicle to receive fast charging DC power in a short time when it is connected to a ground charging pile or other ground vehicles. The slow charging interface 140 is an electrical interface provided on the mobile vehicle 100 for connecting to an AC charging pile for slow charging. Of course, the mobile vehicle 100 can be configured with only one of the fast charging interface 150 and the slow charging interface 140.

[0331] See also Figure 2 It can be understood that the pre-charging branch has a pre-charging resistor 531, which is used to limit the current in the circuit to a suitable range before the subsequent external charging module 300 is powered on, so as to avoid the surge caused by the transient large current from damaging the first positive contactor 532 and / or the fuse. In addition, since the pre-charging branch limits the current, it can also balance the voltages between different batteries 400 to a certain extent, preventing the voltage imbalance between different batteries 400 from causing a loop, thereby improving the circuit safety.

[0332] Since eVTOL maintenance involves various matters in various aspects, various power supply operations may be involved in the specific work process, such as powering various special maintenance tools or other on-board equipment. In this embodiment, the distribution box 500 is provided with at least one reserved interface circuit 540, so that the function expansion can be achieved through the reserved interface circuit 540 to power the aforementioned various special maintenance tools or other on-board equipment, so as to further improve the support capability of the ground handling vehicle.

[0333] See also Figure 5In one embodiment, the electric vehicle ground support equipment further includes an electric energy driving module 200 and an external charging module 300. The electric energy driving module 200 is provided on the movable vehicle 100 to drive the movable vehicle 100 to move; the external charging module 300 is provided on the movable vehicle 100, and the external charging module 300 is used to charge the battery pack of the electric vehicle; the DC bus 520 is respectively connected to the electric energy driving module 200 and the external charging module 300, and the battery 400 is detachably connected to the movable vehicle 100, and the specifications of the battery 400 are consistent with those of the battery pack.

[0334] Specifically, the electric drive module 200 is a powertrain unit of the movable vehicle 100. For a ground handling vehicle, the electric drive module 200 is a key part of the electric vehicle that converts electric energy into mechanical energy to drive the ground handling vehicle. It can be understood that the electric drive module 200 includes but is not limited to a motor, a reducer, an inverter, etc.

[0335] The external charging module 300 is a charging assembly unit, which is used to convert other electrical energy such as AC power in the power grid or DC current in the battery 400 into an acceptable form of electrical energy for the eVTOL battery pack, thereby realizing charging of the eVTOL battery pack. It can be understood that the external charging module 300 includes but is not limited to a charging module formed by a charging circuit, a charging gun connected to the charging module by a cable, etc.

[0336] The battery 400 is used to provide the required electric energy for the external charging module 300 and the electric drive module. In this embodiment, the battery 400 is detachably connected to the movable vehicle 100, so that it can be detached from the movable vehicle 100.

[0337] And the specifications of the battery 400 are consistent with the specifications of the battery pack on the eVTOL. Specifically, the specifications are consistent, which means that the model, size, product parameters, performance indicators and other attributes of the battery 400 and the battery meet the same standards and requirements, so that the two are interchangeable. In addition, in this embodiment, multiple batteries 400 are connected in parallel to form a large battery pack, so that the use of the entire battery pack is not affected after removing some batteries 400. Of course, multiple batteries 400 connected in parallel can also meet the needs of fast charging of multiple eVTOLs.

[0338] It is not difficult to see that compared with the electric energy driving module 200 and the external charging module 300 each using independent batteries for power supply, in this embodiment, the electric energy driving module 200 that drives the movable vehicle 100 to move and the external charging module 300 that charges the battery pack of the electric vehicle are both connected to the battery pack, so that the electric energy used by both is provided by the battery pack, reducing the cost of ground support equipment.

[0339] In addition, since the battery 400 is consistent with the battery pack specifications of the electric vehicle, when the battery pack of the electric vehicle needs to be replaced, the battery 400 on the ground handling vehicle can be directly replaced as a spare part on the electric vehicle, so that a ground handling vehicle can provide multiple support capabilities, and a single ground handling vehicle can meet the needs of the support mission, thereby improving the support capabilities of the ground handling vehicle and reducing the support cost of eVTOL. And by integrating most of the functions required for eVTOL ground support into a ground handling vehicle, eVTOL can take off and land at airports that originally had no ground support facilities, reducing the cost of airport construction and facilitating the promotion and operation of eVTOL.

[0340] It should be noted that the battery pack of eVTOL10 is installed in the wing of eVTOL10 or near the wing of the fuselage, and multiple battery packs are generally arranged in parallel with each other to avoid affecting the power supply of other battery packs after a single battery pack is damaged. However, when the battery packs are connected in parallel, the different voltages of the battery packs will cause a loop to form between the battery packs and cause the battery to burn, so it is necessary to ensure that the voltages between the multiple battery packs are consistent. To this end, in one embodiment, the external charging module 300 has a battery debugging interface, and the battery 400 is detachably connected to the battery debugging interface.

[0341] It can be seen that the external charging module 300 has at least two functions: (1) charging the eVTOL 10; (2) debugging the charge and discharge of the battery 400. Specifically, when replacing the battery, first determine the battery 400 as a spare part, and connect its positive and negative poles to the battery debugging interface of the external charging module 300. Then, the battery 400 is charged and discharged through the external charging module 300 so that the voltage of the battery 400 is adjusted to be consistent with the voltage of the remaining battery pack on the eVTOL, and finally the battery 400 is replaced on the eVTOL.

[0342] It is not difficult to see that in this embodiment, when performing a battery replacement operation, the external charging module 300 on the ground handling vehicle can be directly used to adjust the voltage of the battery 400 to meet the needs of the battery replacement, thereby facilitating rapid battery replacement, and there is no need to use other equipment or tooling to debug the battery voltage during the battery replacement process, thereby further improving the support capability of the ground handling vehicle.

[0343] In one embodiment, the external charging module 300 includes: a charging pile body 310 and a thermal management module 330. The charging pile body 310 is disposed on the movable vehicle 100, and the charging pile body 310 is detachably connected to the electric vehicle through a pipeline; the thermal management module 330 is disposed on the movable vehicle 100, and the thermal management module 330 is configured to communicate with the battery cavity of the electric vehicle to form a battery heat exchange branch 02 when the charging pile body 310 is connected to the electric vehicle, so that the insulating heat exchange fluid in the thermal management module 330 flows in the battery heat exchange branch 02 and is filled into the battery cavity 10a.

[0344] See also Figure 6 and Figure 7 , wherein the charging pile body 310 is the main part of the external charging module 300, which includes but is not limited to a charging module for accommodating an internal charging circuit, providing a human-machine interaction panel required for charging, and carrying a charging gun and a charging cable. The thermal management module 330 is used to provide a thermal management function for the battery pack of the eVTOL during charging. The thermal management module 330 can be arranged inside the charging pile body 310, or can be arranged outside the charging pile body 310. As in one example, the charging pile body 310 includes a shell, and a thermal management module installation space is separated in the shell, and the thermal management module 330 can be installed in the thermal management module installation space. At this time, when the ground vehicle is maintained, the external charging module 300 can be disassembled as a whole by hoisting the shell, so as to improve the maintenance efficiency of the ground vehicle itself in a modular way. Alternatively, the thermal management module 330 can also be arranged on the side of the charging pile body 310, or can be arranged on the movable vehicle 100 separated from the charging pile body 310, and this embodiment does not limit this.

[0345] In this embodiment, the thermal management module 330 is used to provide an insulating heat exchange fluid, and has a heat exchange component that drives the insulating heat exchange fluid to flow in the battery heat exchange branch 02. The insulating heat exchange fluid is a coolant, so that it can absorb and take away heat during the flow. When the charging pile body 310 is connected to the eVTOL10 through the charging gun, the thermal management module 330 is connected to the battery cavity 10a on the eVTOL10, thereby forming a battery heat exchange branch 02, so that the insulating heat exchange fluid can flow in the battery heat exchange branch 02. After the insulating heat exchange fluid enters the battery cavity 10a through the first battery cavity hole 12, it can directly contact the battery cell in the battery cavity 10a, thereby performing thermal management on the battery cell 11, and then flows out along the second battery cavity hole 13. In this way, this embodiment provides immersion cooling for the battery cell 11 of the battery pack, thereby improving the thermal management efficiency.

[0346] The insulating heat exchange fluid is an insulating, flash-free coolant. In one embodiment, the insulating heat exchange fluid is made of deionized water, electronic fluorinated liquid, hydrocarbons, esters or silicone oils. In this way, the insulating heat exchange fluid has the characteristics of high insulation, high specific heat capacity, high thermal conductivity, non-combustibility, no flash point, non-toxicity, and low chemical activity. In addition, even if the insulating heat exchange fluid in this embodiment leaks, safety problems can be avoided. Optionally, in one embodiment, the electronic fluorinated liquid is configured as hydrofluoroether or hydrofluoroolefin. Optionally, in one embodiment, the hydrocarbon is configured as mineral oil or synthetic hydrocarbon oil, such as transformer oil. Optionally, in one embodiment, the lipid is configured as triglyceride or synthetic ester. Optionally, in one embodiment, the silicone oil is configured as dimethyl silicone oil.

[0347] It is worth mentioning that the insulating heat exchange fluid in the battery pack is input into the battery pack by the thermal management module 330 only when the eVTOL 10 is charged, so that the insulating heat exchange fluid is in direct contact with the battery cell 11 in the battery pack to exchange heat, thereby changing the temperature of the battery pack. Alternatively, in a feasible embodiment, the battery pack is also filled with a battery heat exchange medium to form an immersion cooling battery pack for the battery cell in the battery cavity 10a. In this way, during the flight of the eVTOL 10, the battery cell in the immersion cooling battery pack is cooled by the battery heat exchange medium. And the material of the battery heat exchange medium is consistent with the material of the insulating heat exchange fluid, so that the thermal management module in this embodiment can be compatible with the immersion cooling battery pack, that is, when the thermal management module 330 is connected to the battery cavity 10a, the insulating heat exchange fluid and the battery heat exchange medium can be directly fused and mixed, without first emptying the battery heat exchange medium in the battery cavity 10a and then inputting the insulating heat exchange fluid, thereby improving the convenience of maintenance and reducing the difficulty of maintenance.

[0348] It is not difficult to see that in this embodiment, the thermal management module 330 can be connected to the battery cavity 10a in the eVTOL 10 to form a battery heat exchange branch 02, so that in the process of charging the eVTOL 10, the battery cells 11 in the battery pack are immersed in cooling through the insulating heat exchange fluid, thereby providing a thermal management function for the battery pack to support higher power charging, thereby further improving the fast charging speed.

[0349] Also, see Figure 6 and Figure 7 In one embodiment, the charging pile body 310 has a device cavity 311, and the charging module 320 is arranged in the device cavity 311; the thermal management module 330 is also constructed to be connected to the device cavity 311 to form a device heat exchange branch 01, so that the insulating heat exchange fluid can flow in the device heat exchange branch 01 and enter the device cavity.

[0350] The charging pile body 310 has a device cavity 311, which is used to install a charging module that provides charging services. It is understandable that the charging module 320 includes but is not limited to a fast charging circuit and / or a slow charging circuit, and a charging control circuit that controls the fast charging circuit and / or the slow charging circuit to provide charging services. The fast charging circuit is used to provide fast charging services, and the slow charging circuit is used to provide ordinary charging services. In one example, the charging circuit also includes a detection circuit and an isolation circuit. The charging module includes charging power devices such as a DC-DC converter, an AC-DC converter, a battery, a capacitor, an inductor, an induction coil, a rectifier bridge, a high-voltage bus, a switch tube, a fuse protector, and a diode. It is understandable that when all the charging power devices of the charging module 320 are integrated into one chamber, the device cavity 311 can be a chamber. Alternatively, when all the charging power devices of the charging module 320 are distributed in multiple chambers, the device cavity 311 can also be a connected body composed of multiple chambers connected by pipelines, and this embodiment does not limit this. It is worth mentioning that the device cavity 311 is a chamber with a sealed design, thereby isolating the environment inside the device cavity from the environment outside the device cavity, so as to prevent the insulating heat exchange fluid from leaking from the device cavity 311 when flowing in the device cavity 311. In addition, the chamber structure with a sealed design of the device cavity 311 can also allow the insulating heat exchange fluid to completely fill the device cavity 311 and completely submerge the charging module 320. The device cavity 311 can be filled with the insulating heat exchange fluid, and of course, the insulating heat exchange fluid can also submerge all the charging power devices. The insulating heat exchange fluid exchanges heat with each charging module 320 in the device cavity 311 to cool down each charging module 320. Please refer to Figure 7 It can be understood that the charging pile body 310 has a first device hole 3111 and a second device hole 3112 connected to the device cavity 311. The first device hole 3111 is for the insulating heat exchange fluid to flow in, and the second device hole 3112 is for the insulating heat exchange fluid to flow out. Of course, in order to allow the insulating heat exchange fluid to completely submerge the charging module 320, the first device hole 3111 and the second device hole 3112 are also arranged on the top wall or the upper part of the side wall of the device cavity 311. In addition, the charging pile body 310 may be provided with a corresponding flow channel or guide structure to ensure that the insulating heat exchange fluid circulates to each charging module 320 to ensure the immersion effect.

[0351] Since the charging module 320 and the battery cells 11 of the battery pack will generate heat during charging, this embodiment provides immersion cooling for the charging module 320 and the battery cells 11 of the battery pack in the device cavity 311 to improve thermal management efficiency.

[0352] Specifically, the thermal management module 330 is connected to the device cavity 311, thereby forming a device heat exchange branch 01. At this time, the cooled insulating heat exchange fluid enters the device cavity 311 through the first device hole 3111, and directly contacts each charging module 320 in the device cavity 311, thereby taking away the heat generated by the charging module 320 and heating up. The heated insulating heat exchange fluid leaves the device cavity 311 through the second device hole 3112 and continues to move along the device heat exchange branch 01, thereby taking away the heat from the device cavity 311.

[0353] It is not difficult to see that the thermal management module 330 in this embodiment is not only connected to the device cavity 311 where the charging module 320 is installed to form a device heat exchange branch 01, but also can be connected to the battery cavity 10a in the eVTOL 10 to form a battery heat exchange branch 02, so that in the process of charging the eVTOL 10, the charging module 320 in the device cavity 311 is immersed in cooling through the insulating heat exchange fluid, and the battery cell 11 in the battery pack can also be immersed in cooling. In this way, during the fast charging process, the battery pack can always be maintained in a certain temperature range, meeting the requirements of fast charging while maintaining the uniformity of the battery pack temperature.

[0354] In addition, compared to the strict requirements of eVTOL10 for space and weight, the ground handling vehicle has enough spare space and weight to install a thermal management module 330 with greater power, which is conducive to improving the thermal management effect of the battery pack. And because the thermal management function of the battery pack during charging is provided by the thermal management module 330 on the ground handling vehicle, the thermal management device of eVTOL10 can only provide thermal management services when the battery pack is discharged, and does not need to be started when charging, that is, eVTOL10 can carry a thermal management device with less power than that in the related art, thereby reducing the space and weight occupied by the thermal management device on eVTOL10. Of course, since the thermal management device of eVTOL10 itself does not need to be started when charging, it can also make eVTOL10 more energy-efficient.

[0355] In addition, in addition to providing immersion cooling for the battery pack, the thermal management module 330 of this embodiment also uses immersion cooling technology to directly immerse components such as charging power devices, which has better cooling effect and simpler structure. It also solves the complex problems of low indirect cooling efficiency in traditional liquid cooling technology and the need for liquid leakage prevention design and insulation design in specific structural design.

[0356] See also Figure 7In one embodiment, the thermal management module 330 may include a first thermal management submodule 330a and a second thermal management submodule 330b, wherein the first thermal management submodule 330a is connected to the device heat exchange branch 01, and the second thermal management submodule 330b is connected to the battery heat exchange branch 02. The first thermal management submodule 330a and the second thermal management submodule 330b each have an independent heat exchange system, thereby independently adjusting the temperature of the insulating heat exchange fluid in the corresponding branch. In this way, the battery heat exchange branch 02 and the device heat exchange branch 01 are temperature-controlled independently of each other without affecting each other, so as to improve safety and reduce the complexity of the temperature control program.

[0357] Alternatively, see Figure 8 In one embodiment, the thermal management module 330 includes a main circuit, which includes a medium storage box 331, a pump 332 and a heat exchanger 333 connected in sequence through pipelines. Among them, the medium storage box 331 can be constructed as an expansion water tank, in which an insulating heat exchange fluid is stored. The capacity of the expansion water tank needs to be determined according to all heat exchange requirements, and a certain margin is reserved. The pump 332 is used to drive the insulating heat exchange fluid to flow in the battery heat exchange branch 02 and / or the device heat exchange branch 01. The power of the pump 332 is calculated based on the flow resistance. The pump 332 can be integrated into the heat exchanger 333. The heat exchanger 333 is used to exchange heat with the insulating heat exchange fluid. When the insulating heat exchange fluid flows through the heat exchanger 333, under the action of the heat exchanger 333, the temperature of the insulating heat exchange fluid is changed, so that the temperature difference between the insulating heat exchange fluid and the battery cell 11 and / or the charging module 320 is large, so that heat exchange can be performed on them.

[0358] In an optional embodiment, the heat exchanger 333 includes a direct evaporation refrigeration cycle device. In this way, the heat exchanger 333 can adjust the temperature of the insulating heat exchange fluid, and adjust the temperature of the battery pack and the device cavity 311 by adjusting the temperature of the insulating heat exchange fluid. However, this embodiment is not limited to this. In other embodiments, the heat exchanger 333 adjusts the temperature of the insulating heat exchange fluid through an indirect water circulation refrigeration device, an absorption refrigeration device, or a semiconductor refrigeration device.

[0359] It is understandable that in some low-temperature use environments such as high latitudes, low temperatures will inevitably affect the normal operation of the battery pack and / or the charging module 320. For example, in an optional embodiment, the main circuit also includes a PTC (Positive Temperature Coefficient) heater (not shown). Alternatively, in another optional embodiment, the heat exchanger 333 is connected to the heat pump system, and the heat pump system switches between cooling mode and heating mode. In this way, through the PTC heater, or when the heat pump system is in heating mode, the insulating heat exchange fluid flowing through the main circuit can also be heated. In this way, the thermal management module 330 can not only heat the insulating heat exchange fluid, but also cool the insulating heat exchange fluid, thereby adapting to various temperature conditions, that is, improving the environmental adaptability of the thermal management module 330. Of course, in other optional embodiments, the battery pack of the eVTOL is provided with a phase change module and a heat exchange module connected to the phase change module for heat exchange, so that the eVTOL can use the battery pack as a heat source for the aircraft temperature control system to control the temperature of the cabin. At this time, through the mode switching of the PTC heater and / or heat pump system, as well as the battery heat exchange branch, the phase change module in the battery pack is heated or cooled in advance, so that the phase change material is transformed into the phase required for the flight mission. In this way, during the flight, the phase change material can exchange heat with the refrigerant in the aircraft temperature control system, that is, the phase change material stores the heat transferred from the cabin, or the phase change material transfers the heat stored in advance to the cabin, so that the phase change material in the battery pack can meet various temperature control scenarios of eVTOL to improve the reliability and adaptability of the aircraft.

[0360] Specifically, the expansion water tank has a first tank port and a second tank port, the first tank port is connected to the pump 332 through a pipeline, the outlet of the pump 332 is connected to the heat exchanger 333 through a pipeline, and the heat exchanger 333 has a medium pump outlet pipe 3331. The second tank port is connected to the medium return pipe 3311. At this time, the medium return pipe 3311, the expansion water tank, the pump 332, the heat exchanger 333 and the medium pump outlet pipe 3331 are connected in series in sequence to form the main path of this embodiment.

[0361] As an optional implementation, the device heat exchange branch 01 and the battery heat exchange branch 02 are connected in parallel and then connected in series to the main circuit to form a circulation loop. Fig. 9, the medium pump-out pipe 3331 is connected to a first three-way pipe 361, one interface of the first three-way pipe 361 is connected to the battery cavity 10a through a pipeline, and the other interface of the first three-way pipe 361 is connected to the device cavity 311 through a pipeline; similarly, the medium return pipe 3311 is connected to a second three-way pipe 362, one interface of the second three-way pipe 362 is connected to the battery cavity 10a through a pipeline, and the other interface of the second three-way pipe 362 is connected to the device cavity 311 through a pipeline. In this way, when the charging pile body 310 is connected to the eVTOL, one interface of the first three-way pipe 361, the battery cavity 10a and one interface of the second three-way pipe 362 constitute the battery heat exchange branch 02, and the other interface of the first three-way pipe 361, the device cavity 311 and the other interface of the second three-way pipe 362 constitute the device heat exchange branch 01.

[0362] In this embodiment, when the charging pile body 310 is connected to the eVTOL, the device heat exchange branch 01 and the battery heat exchange branch 02 are connected in parallel and then connected in series to the main circuit to form a circulation loop. At this time, the pump transports the insulating heat exchange fluid to the heat exchanger 333 for cooling. After the cooling, the insulating heat exchange fluid passes through the medium pump outlet pipe 3331 and is divided into two paths at the first three-way pipe 361:

[0363] Device heat exchange branch 01: The insulating heat exchange fluid passes through the first device hole 3111 and enters the device cavity 311 to directly contact with each charging module 320 for heat exchange and heat rise. The heated insulating heat exchange fluid passes through the second device hole 3112 and the pipeline in turn to return to the second three-way pipe 362, and then returns to the expansion water tank through the medium return pipe 3311.

[0364] Battery heat exchange branch 02: The insulating heat exchange fluid enters the battery cavity 10a from the charging pile body 310 and directly contacts the battery cell 11 for heat exchange and heat rises. The heated insulating heat exchange fluid passes through the second battery cavity hole 13 and returns to the second three-way pipe 362, and then returns to the expansion water tank through the medium return pipe 3311.

[0365] In this embodiment, the device heat exchange branch 01 and the battery heat exchange branch 02 are connected in parallel to the same main circuit. In this way, the insulating heat exchange fluid transported from the main circuit is divided into two paths and enters the device heat exchange branch 01 and the battery heat exchange branch 02, so that the insulating heat exchange fluid cooled by the heat exchanger 333 can enter the device heat exchange branch 01 or the battery heat exchange branch 02 as soon as possible for heat exchange. The insulating heat exchange fluids in the two branches do not affect each other, and the cooling effect of the insulating heat exchange fluids in the two branches can be ensured.

[0366] Alternatively, as another optional implementation, the device heat exchange branch 01, the battery heat exchange branch 02 and the main circuit are connected in series to form a circulation loop.

[0367] See also Figure 8 As an option of this embodiment: the medium pump-out pipe 3331 is connected to the first battery cavity hole 12 of the battery cavity 10a through the connecting pipe between the ground handling vehicle and the eVTOL, the second battery cavity hole 13 of the battery cavity 10a is connected to the first device hole 3111 of the device cavity 311 through another connecting pipe, and the second device hole 3112 of the device cavity 311 is connected to the medium return pipe 3311. At this time, the main circuit, the battery heat exchange branch 02 and the device heat exchange branch 01 are connected in series in sequence, and the three form a circulation loop, and the insulating heat exchange fluid pumped out of the main circuit first enters the battery heat exchange branch 02, then enters the device heat exchange branch 01, and finally flows into the main circuit.

[0368] Or as another option of this embodiment: the medium return pipe 3311 is connected to the second battery cavity hole 13 of the battery cavity 10a through the connecting pipe between the eVTOL and the ground handling vehicle, the first battery cavity hole 12 of the battery cavity 10a is connected to the second device hole 3112 of the device cavity 311 through another connecting pipe, and the first device hole 3111 of the device cavity 311 is connected to the medium pumping pipe 3331. At this time, the main circuit, the device heat exchange branch 01 and the battery heat exchange branch 02 are connected in series in sequence, and the three form a circulation loop, and the insulating heat exchange fluid pumped out of the main circuit first enters the device heat exchange branch 01.

[0369] It is not difficult to see that the series connection of pipes is simpler than the parallel connection. It should be noted that since the temperature that the charging module 320 can withstand is higher than the temperature that the battery cell 11 in the battery pack can withstand, it is better that the battery heat exchange branch 02 is connected in series upstream of the device heat exchange branch 01. In this way, the insulating heat exchange fluid that has been cooled by the heat exchanger 333 first flows through the battery heat exchange branch 02 to cool the battery cell, and then flows through the device heat exchange branch 01 to cool the various charging modules 320. In this way, the parameters of the insulating heat exchange fluid can be designed accordingly based only on the cooling requirements of the battery cell, without fully considering the cooling requirements of the battery cell 11 and the cooling requirements of the charging module 320. This not only ensures the cooling effect of the battery, but also reduces the complexity of the temperature control of the insulating heat exchange fluid.

[0370] In this embodiment, the device heat exchange branch 01 and the battery heat exchange branch 02 are both temperature controlled by the heat exchanger 333 on the same main line, which reduces the number of components of the thermal management module 330. In addition, the device heat exchange branch 01 and the battery heat exchange branch 02 are both temperature controlled by the heat exchanger 333 on the same main line, which can also reduce the volume and weight of the thermal management module 330, thereby facilitating the miniaturization of the thermal management module and further facilitating the integration of the thermal management module into the ground handling vehicle.

[0371] It is understandable that after the battery pack is charged, the insulating heat exchange fluid may need to be discharged from the battery cavity 10a. Therefore, in one embodiment, the thermal management module 330 further includes a gas-filling and liquid-exchanging component, which is connected to the battery heat exchange branch and is used to input non-flammable gas into the battery cavity 10a to discharge the insulating heat exchange fluid from the battery cavity 10a.

[0372] In this way, when the temperature of the battery pack is adjusted to a preset temperature or is fully charged, the eVTOL can introduce non-flammable gas into the battery heat exchange branch through the inflation and fluid exchange assembly during the flight takeoff preparation stage. After the non-flammable gas enters the battery cavity 10a through one of the first battery cavity hole 12 and the second battery cavity hole 13, the insulating heat exchange fluid therein is squeezed out of the battery cavity 10a through the other of the first battery cavity hole 12 and the second battery cavity hole 13. On the one hand, the insulating heat exchange fluid in the battery cavity 10a is discharged, and on the other hand, during the flight of the eVTOL, the battery cavity 10a is filled with non-flammable gas to suppress the combustion of the battery cavity 10a when thermal runaway occurs in the battery cavity 10a.

[0373] Alternatively, when the circuit in the device cavity 311 needs to be repaired and maintained or the insulating heat exchange fluid needs to be discharged for other reasons, the insulating heat exchange fluid in the device cavity 311 also needs to be discharged. To this end, in one embodiment, the thermal management module 330 further includes a gas-filling and liquid-exchanging component, which is connected to the device heat exchange branch 01 and is used to input non-flammable gas into the device cavity 311 to discharge the insulating heat exchange fluid from the device cavity 311.

[0374] Specifically, when the insulating heat exchange fluid needs to be discharged, non-combustible gas can be introduced into the device heat exchange branch through the gas-filled liquid-exchanging assembly. After the non-combustible gas enters the device cavity 311 through one of the first device hole 3111 and the second device hole 3112, the insulating heat exchange fluid inside it is squeezed out of the device cavity 311 through the other of the first device hole 3111 and the second device hole 3112, thereby discharging the insulating heat exchange fluid in the device cavity 311.

[0375] Of course, in some feasible implementations, when the battery heat exchange branch and the device heat exchange branch are connected in series, the insulating heat exchange fluid in the battery cavity 10a and the device cavity 311 can be discharged simultaneously through an inflation and drainage assembly. It should be noted that when the inflation and drainage assembly is working, the insulating heat exchange fluid can return to the expansion water tank under the action of non-flammable gas. Of course, the insulating heat exchange fluid can also be discharged to the outside.

[0376] The non-combustible gas in this embodiment refers to the gas other than the combustible gas and the combustion-supporting gas. In one embodiment, the non-combustible gas includes one or more of an inert gas, nitrogen, carbon dioxide, and sulfur hexafluoride.

[0377] For details, please refer to Figure 8, the gas filling and liquid replacement assembly includes a gas storage device 341 and a gas circuit valve 342 which are connected in sequence through a pipeline. The gas storage device 341 can be a high-pressure gas storage device, and the gas circuit valve 342 is a pressure reducing valve. In this way, the gas storage device 341 has a relatively high gas pressure. Under the action of the high gas pressure, the non-combustible gas will enter the battery cavity 10a in the eVTOL along the pipeline. After the non-combustible gas enters the battery cavity 10a, it squeezes the insulating heat exchange fluid, so that the insulating heat exchange fluid is discharged from the battery cavity 10a. In addition, under the action of the pressure reducing valve, the high-pressure non-combustible gas in the gas storage device 341 can be released by reducing the pressure to prevent the pipeline from being subjected to excessive gas pressure, thereby preventing the pipeline, the battery cell 11 in the battery cavity 10a, and the charging module 320 in the device cavity 311 from being damaged.

[0378] See also Figure 8 and Fig.10 In one embodiment, a cooling channel is defined in at least one of the control module 600, the electric drive module 200, and the battery 400, and the thermal management module 330 is connected to the cooling channel to allow the insulating heat exchange fluid to flow in the cooling channel.

[0379] It should be noted that, since the ground handling vehicle has many functions, the corresponding control strategy should be configured in advance in the control module 600 from the perspective of safe operation to prohibit the simultaneous activation of multiple functions. That is, multiple functions are mutually exclusive. For example, when the ground handling vehicle is in a driving state, functions such as charging the battery 400, charging the eVTOL, and debugging the battery 400 should be completely prohibited. Similarly, when the battery 400 is being charged, the vehicle should be prohibited from driving, charging the eVTOL, and debugging the battery 400.

[0380] Also, see Figure 8 , a cooling channel may be defined in the control module 600, and the cooling channel is arranged adjacent to or surrounding the heat-generating components such as the processor in the control module 600. In this way, when the thermal management module provides the cooled insulating heat exchange fluid, the cooled insulating heat exchange fluid flows through the cooling channel to cool the heat-generating components in the control module 600. That is, in this embodiment, the cooling function of the control module 600 itself in the ground handling vehicle, the cooling function of the charging pile itself, and even the thermal management function of the battery are all integrated into a thermal management module of the ground handling vehicle, thereby improving the functional integration inside the ground handling vehicle.

[0381] Also, see Figure 8, a corresponding cooling channel can also be defined in the electric energy drive module 200, and the cooling channel is arranged inside the electric energy module, such as inside the motor. Therefore, when the thermal management module provides the cooled insulating heat exchange fluid, the insulating heat exchange fluid flows through the cooling channel to absorb and take away the heat inside the electric energy drive module 200. That is, in this embodiment, the cooling function of the electric energy drive module itself in the ground handling vehicle, the cooling function of the charging pile itself, and even the thermal management function of the battery are all integrated into the thermal management module of the ground handling vehicle, thereby improving the functional integration inside the ground handling vehicle.

[0382] Also, see Figure 8 , a corresponding cooling channel may also be defined in the battery 400, and the cooling channel is arranged between the battery cells. Therefore, when the thermal management module 330 provides the cooled insulating heat exchange fluid, the insulating heat exchange fluid flows through the cooling channel to absorb and take away the heat inside the battery cell. That is, in this embodiment, the cooling function of the battery itself in the ground handling vehicle, the cooling function of the electric energy drive module 200 itself, and the cooling function of the charging pile itself, and even the thermal management function of the battery on the eVTOL are all integrated into the thermal management module 330 of the ground handling vehicle, thereby improving the functional integration inside the ground handling vehicle.

[0383] It can be understood that the above-mentioned cooling channels are all provided in the electric drive module 200, the control module 600 and the battery 400, and are all connected to the thermal management module 330. At this time, the cooling channels in the three can be connected in parallel to form a motor cooling channel, a control cooling channel and a battery cooling channel, or they can be connected in series to form a vehicle cooling channel, which is not limited in this embodiment. Of course, in one embodiment, at least one of the electric drive module 200, the control module 600 or the battery 400 is provided with an air cooling structure.

[0384] It can be seen that in this embodiment, the thermal management functions of other onboard equipment of the ground handling vehicle can be integrated into the thermal management module 330, thereby improving the functional integration inside the ground handling vehicle.

[0385] In one embodiment, the movable vehicle 100 includes a compartment 120 , the external charging module 300 and the battery 400 are both disposed in the compartment 120 , and heat dissipation holes are provided at positions of the side walls of the compartment 120 corresponding to the external charging module 300 .

[0386] Specifically, when the movable vehicle 100 is a vehicle, it includes a chassis 110 and an upper part. The chassis 110 can be a truck chassis, a pickup chassis, an MPV (Multi-Purpose Vehicle) chassis, etc. The chassis 110 includes a vehicle body, a cab, tires, a steering system, a hydraulic component, an air pump component, and a braking system. In addition, the chassis 110 is also equipped with the aforementioned control module 600 and the electric energy drive module 200. Please refer to Figure 3 In one example, a traction rod 130 may be provided at one end of the chassis 110 in the length direction, such as the tail, so that the ground handling vehicle also has a traction function, further increasing the functions of the ground handling vehicle and improving the support capability of a single ground handling vehicle.

[0387] The upper part includes a compartment 120, a battery 400, a distribution box 500, an external charging module 300, etc. The compartment 120 is a part installed on the chassis 110 for loading equipment. In one example, the compartment 120 is a closed container or a semi-closed container with a rectangular cross-section.

[0388] In order to prevent the external charging module 300 and other on-board equipment on the ground handling vehicle from being exposed to the external environment and affecting its use, the battery 400 and the external charging module 300 are both installed in the vehicle compartment 120 .

[0389] See also Fig.11 In one embodiment, a plurality of chambers may be separated by partitions in the carriage 120, including a battery compartment 121 and an external charging module compartment 122. For example, the battery compartment 121 and the external charging module compartment 122 are arranged in a square along the length of the carriage 120. Of course, in other embodiments, the battery compartment 121 and the external charging module compartment 122 may also be arranged along the width direction of the carriage 120, and this embodiment is not limited thereto. All batteries 400 are installed in the battery compartment 121. Of course, most of the batteries 400 may also be installed in the battery compartment 121, and 1 to 2 small portions of the batteries 400 may be installed in other parts of the carriage 120 for backup use. The external charging module 300 is installed in the external charging module compartment 122.

[0390] It can be seen that in this embodiment, the battery 400 for driving the vehicle forward is not installed on the chassis 110 of the vehicle, but is installed in the vehicle compartment 120. Compared with the layout in which the battery 400 is installed on the chassis 110, the ground clearance is higher, which improves the passing ability of the chassis 110 of the ground handling vehicle, and helps the ground handling vehicle adapt to eVTOL protection and emergency rescue and maintenance work under various field road conditions.

[0391] The heat dissipation holes and the external charging module 300 can be arranged opposite each other, such as the side wall of the compartment 120 is provided with a heat dissipation hole connected to the external charging module compartment 122, so that the waste heat generated by the external charging module 300 during operation can be dissipated to the outside air through the heat dissipation holes. The heat dissipation holes may include a plurality of circular holes, square holes, long holes or other hole structures arranged in an array, and this embodiment is not limited to this. In other embodiments, the heat dissipation holes may also be constructed as a shutter structure.

[0392] The heat dissipation holes may include multiple groups, such as two groups of heat dissipation holes respectively disposed on the two side walls in the width direction of the compartment 120 to form convection air. For example, in one embodiment, a group of heat dissipation holes is configured on both side walls opposite to the external charging module compartment 122. The two groups of heat dissipation holes enable air convection to be formed in the external charging module compartment 122, further improving the heat dissipation effect.

[0393] In one embodiment, the movable vehicle 100 further includes a rainproof component (not shown), which is disposed at the heat dissipation hole.

[0394] In addition, in order to ensure the reliability of the ground handling vehicle in rainy days or wading environments, a rainproof component is also provided at the heat dissipation hole, and the rainproof component is used to prevent rain or splashing water droplets from passing through the heat dissipation hole and entering the car 120. In one example, the rainproof component can be constructed as a waterproof edge, one end of which is fixed to the upper edge of the heat dissipation hole, and the other end extends vertically downward in a direction away from the heat dissipation hole. In another example, the rainproof component can also be constructed as a honeycomb stainless steel rainproof wire mesh covering the heat dissipation hole. Of course, the rainproof component can also be other structures, and this embodiment does not limit this.

[0395] In one embodiment, a battery access hole 123 and a charging gun access hole 124 are formed on the side wall of the carriage 120. The battery access hole 123 is for the battery 400 to pass through, and the charging gun access hole 124 is for the charging gun of the external charging module 300 to pass through. The movable vehicle 100 also includes a first cover and a second cover. The first cover can be opened and closed at the battery access hole 123 to open or close the battery access hole 123, and the second cover can be opened and closed at the charging gun access hole 124 to open or close the charging gun access hole 124.

[0396] At least one battery access hole 123 is provided on the compartment 120 corresponding to the battery 400. The size of the battery access hole 123 allows the battery 400 to pass through, so that the battery 400 can be quickly removed and replaced as a spare part on the eVTOL. A charging gun access hole 124 is provided on the compartment 120 at a position corresponding to the external charging module 300. The size of the charging gun access hole 124 allows the charging gun of the external charging module 300 to pass through. That is, when the external charging module 300 is not in operation, the charging gun can be retracted and fixed on the external charging module 300. When the external charging module 300 is in operation, the charging gun is extended out of the compartment 120.

[0397] In order to prevent rainwater, foreign matter, etc. from entering the battery compartment 121, a first cover is provided at the battery access hole 123, and the first cover opens or closes the battery access hole 123. Therefore, when the ground handling vehicle is driving, stopped for maintenance but not changing the battery, the first cover closes the battery access hole 123 to ensure the safety of the environment in the battery compartment 121. When it is necessary to change the battery and take out the battery 400, the first cover opens the battery access hole 123 to allow the battery 400 to be taken out.

[0398] Similarly, in order to prevent rainwater, foreign objects, etc. from entering the vehicle compartment 120 (external charging module compartment 122), a second cover is provided at the charging gun access hole 124, and the second cover opens or closes the charging gun access hole 124. Therefore, when the ground handling vehicle is not performing charging operations, the second cover will close the charging gun access hole 124 to ensure the safety of the environment in the external charging module compartment 122.

[0399] It should be noted that the first covering member and the second covering member can be constructed as structures such as a hinged door, a sliding door, etc. at the corresponding entrance and exit.

[0400] It is understandable that when the battery needs to be replaced, the battery 400 that needs to be removed can be determined first, and then the battery 400 can be connected to the battery debugging interface through circuit switching, and the battery 400 can be parameter debugged through the battery debugging interface. After the parameter debugging is completed, the battery 400 can be removed and taken out from the battery compartment 121. However, since the inspection of the battery 400 during the battery replacement is not limited to voltage adjustment, it also involves a variety of comprehensive and detailed inspections such as shell inspection, pole external inspection, leakage detection, electrolyte inspection, temperature inspection, etc. Therefore, the battery 400 can be taken out of the battery compartment 121 in advance, and the voltage can be adjusted only after passing the above inspections. To this end, in one embodiment, a battery debugging position 1251 is further defined in the carriage 120, and the battery debugging position 1251 is arranged adjacent to the external charging module 300; a hatch opening facing the battery debugging position 1251 is provided on the side wall of the carriage 120; the movable vehicle 100 also includes a debugging hatch, which is used for the battery 400 to pass through, and the debugging hatch is arranged at the hatch opening to open or close the hatch opening.

[0401] The carriage 120 may reserve a battery debugging position 1251 behind the external charging module 300 (near the rear of the vehicle), so that the voltage of the battery 400 may be debugged at the battery debugging position 1251 using the battery debugging interface of the external charging module 300 .

[0402] Specifically, a battery debugging cabin 125 is defined in the compartment 120 by a partition at the side (rear) of the external charging module cabin 122. The battery debugging cabin 125 is connected to the outside through the hatch opening, so that the battery 400 can enter or leave the battery debugging cabin 125. The hatch opening is provided with a debugging hatch, and the debugging hatch closes the hatch opening when the battery debugging cabin is not in use. It can be understood that the debugging hatch can be constructed as a sliding door, a rolling door, a swing door, etc., and this embodiment does not limit this.

[0403] A connecting hole is provided on the partition between the external charging module compartment 122 and the battery debugging compartment 125, and the connecting hole is directly opposite to the battery debugging interface provided on the external charging module 300, so that the battery debugging interface is exposed from the connecting hole. In this way, when the battery needs to be replaced, the battery 400 that needs to be removed is first determined, and the battery 400 is taken out of the battery compartment 121, and then the debugging compartment door is opened to place the battery 400 in the battery debugging compartment. The maintenance personnel can perform various inspections on the battery 400 according to the preset inspection specifications, and after the inspection is passed, the battery 400 is connected to the battery debugging interface through a cable, and finally the voltage charging and discharging is debugged.

[0404] Of course, there is also an emergency battery in the car. In this case, an emergency debugging interface connected to the emergency battery can be provided in the battery debugging cabin, so that the voltage charging and discharging of the battery 400 can be debugged through the emergency battery.

[0405] In addition, in order to facilitate various inspections of the battery 400, in one embodiment, a tool spare box is also provided in the compartment 120, and the tool spare box is arranged adjacent to the battery debugging position 1251. For example, the tool box can be arranged in the aforementioned battery debugging compartment 125, and the two are arranged side by side in the width direction of the compartment 120.

[0406] The tool spare parts box contains various tooling tools. Of course, the tooling tools in the tool spare parts box are not limited to the tooling tools for debugging the battery 400, but also include other tools for ground vehicle driving maintenance, charging pile maintenance, etc.

[0407] In one embodiment, a fireproof layer is provided on the inner wall of the compartment 120. In this embodiment, the inner wall of the compartment 120 includes but is not limited to the inner wall of the outer frame of the compartment 120 and the two side walls of the partition. The fireproof layer is constructed as an aerogel fireproof coating, a fireproof paint layer or other types of fireproof layer structures.

[0408] In this embodiment, the fireproof layer can prevent the flame from spreading when the battery 400 experiences thermal runaway or other fire events, thereby leaving sufficient time for personnel to escape and improving the safety of the ground handling vehicle.

[0409] In one embodiment, the movable vehicle 100 further includes a fire extinguishing assembly, which is disposed in the vehicle compartment 120 .

[0410] In this embodiment, multiple fire extinguishing components can be respectively arranged in the battery compartment 121, the external charging module compartment 122, the battery debugging compartment 125 and other compartments, so that when a fire occurs in each compartment, the fire extinguishing components can be quickly activated to extinguish the fire. The fire extinguishing component is a perfluorohexanone spray component. Of course, in other embodiments, the fire extinguishing component can also be a spray component of a medium such as heptafluoropropane, high-pressure carbon dioxide, or ultra-fine water mist.

[0411] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0412] The present application provides a computer-readable storage medium having computer-readable program instructions (ie, computer program) stored thereon, and the computer-readable program instructions are used to execute the battery control method in the above-mentioned embodiment.

[0413] The computer-readable storage medium provided in the present application may be, for example, a USB flash drive, but is not limited to electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems or devices, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM: Random Access Memory), a read-only memory (ROM: Read Only Memory), an erasable programmable read-only memory (EPROM: Erasable Programmable Read Only Memory or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM: CD-Read Only Memory), an optical storage device, a magnetic storage device, or any suitable combination of the above. In this embodiment, the computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system or device. The program code contained on the computer-readable storage medium may be transmitted using any appropriate medium, including but not limited to: wires, optical cables, RF (Radio Frequency: Radio Frequency), etc., or any suitable combination of the above.

[0414] The computer-readable storage medium may be included in the control module; or may exist independently without being assembled into the control module.

[0415] The computer-readable storage medium carries one or more programs. When the one or more programs are executed by the control module, the control module: obtains the total charge and discharge state parameters and external charge and discharge parameters of the battery pack; the battery pack includes multiple batteries connected in parallel, and the batteries are connected to the DC bus through a bidirectional DC converter DCDC; when the total charge and discharge state parameters do not match the external charge and discharge parameters, select at least one target battery from the battery pack, so that after the charge and discharge state parameters of the target battery are assigned to preset values, the recalculated total charge and discharge state parameters match the external charge and discharge parameters; wherein the preset value corresponds to the parameter type of the charge and discharge state parameters; through the bidirectional DCDC corresponding to the target battery, control the target battery to charge and discharge based on the charge and discharge strategy corresponding to the preset value, and through the bidirectional DCDC corresponding to each remaining battery, control each remaining battery to charge and discharge based on the charge and discharge balancing strategy, and the remaining battery is the battery in the battery pack except the target battery.

[0416] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, C++, and conventional procedural programming languages ​​such as "C" or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as a separate software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0417] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present application. In this regard, each square box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the square box can also occur in a sequence different from that marked in the accompanying drawings. For example, two square boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each square box in the block diagram and / or flow chart, and the combination of the square boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0418] The modules involved in the embodiments described in this application may be implemented by software or hardware, wherein the name of the module does not constitute a limitation on the unit itself in some cases.

[0419] The readable storage medium provided in this application is a computer-readable storage medium, which stores computer-readable program instructions (i.e., computer programs) for executing the above-mentioned battery control method, and can solve the corresponding technical problems. Compared with the prior art, the beneficial effects of the computer-readable storage medium provided in this application are the same as the beneficial effects of the battery control method provided in the above-mentioned embodiment, and will not be repeated here.

[0420] The present application also provides a computer program product, including a computer program, which implements the steps of the battery control method described above when the computer program is executed by a processor. Compared with the prior art, the beneficial effects of the computer program product provided by the present application are the same as the beneficial effects of the battery control method provided by the above embodiment, and will not be repeated here.

[0421] The above are only preferred embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A battery control method, characterized in that: The method comprises: Obtaining total charge and discharge state parameters and external charge and discharge parameters of a battery pack; the battery pack includes a plurality of batteries connected in parallel, and the batteries are connected to a DC bus through a bidirectional DC converter DCDC; In the case where the total charge and discharge state parameter does not match the external charge and discharge parameter, at least one target battery is selected from the battery pack so that after the charge and discharge state parameter of the target battery is assigned a preset value, the total charge and discharge state parameter recalculated matches the external charge and discharge parameter; wherein the preset value corresponds to the parameter type of the charge and discharge state parameter, and in the discharge process, the charge and discharge state parameter is the rated power, and the rated power of the target battery is assigned to the corresponding maximum power; and the external charge and discharge parameter is the load power; Control the target battery to be charged and discharged based on the charge and discharge strategy corresponding to the preset value through the bidirectional DCDC corresponding to the target battery, and control each of the remaining batteries to be charged and discharged based on the charge and discharge balancing strategy through the bidirectional DCDC corresponding to each of the remaining batteries, wherein the remaining batteries are batteries other than the target battery in the battery pack; Wherein, the battery pack includes a plurality of rechargeable batteries and a plurality of non-rechargeable batteries, and the bidirectional DCDC corresponding to the target battery controls the target battery to charge and discharge based on the charge and discharge strategy corresponding to the preset value, including: controlling the first main battery to perform constant voltage discharge according to the DC bus voltage through the corresponding bidirectional DCDC, and controlling the target battery to perform constant power discharge based on the corresponding maximum power through the corresponding bidirectional DCDC; the first main battery is one of all the rechargeable batteries; or, The battery pack includes a plurality of non-rechargeable batteries, and the bidirectional DCDC corresponding to the target battery controls the target battery to charge and discharge based on a charge and discharge strategy corresponding to the preset value, including: controlling the second main battery to discharge at a constant voltage with a DC bus voltage through the corresponding bidirectional DCDC, and controlling the target battery to discharge at a constant power with a corresponding maximum power through the corresponding bidirectional DCDC; the second main battery is one of all the non-rechargeable batteries.

2. The battery control method according to claim 1, characterized in that: When the battery pack includes a plurality of rechargeable batteries and a plurality of non-rechargeable batteries, when the total charge and discharge state parameter does not match the external charge and discharge parameter, selecting at least one target battery from the battery pack includes: Among all the rechargeable batteries, the rechargeable battery with the largest remaining capacity is used as the first main battery; In the case where the first total maximum power of all the non-rechargeable batteries is greater than or equal to the load power, determining whether the first total rated power of the battery pack is less than the load power; the first total rated power is the sum of the rated powers of the first main battery and all the non-rechargeable batteries; When the first total rated power is less than the load power, marking the non-rechargeable battery with the smallest maximum power among all the non-rechargeable batteries as a second target battery; Assigning the rated power of the second target battery to the maximum power corresponding to the second target battery; Recalculating the first total rated power to obtain a first total power recalculation result; In a case where the first total power recalculated result is less than the load power, marking the non-rechargeable battery with the smallest maximum power among all the non-rechargeable batteries except the second target battery as the second target battery to serve as the target battery; Return to the step of assigning the rated power of the second target battery to the maximum power corresponding to the second target battery until the first total power is recalculated to be greater than or equal to the load power.

3. The battery control method according to claim 2, characterized in that: The controlling each of the remaining batteries to charge and discharge based on a charge and discharge balancing strategy through the bidirectional DCDC corresponding to each of the remaining batteries includes: For any remaining non-rechargeable battery except the second target battery, determine a target non-rechargeable battery ranked before the remaining non-rechargeable battery from a first battery sequence; the first battery sequence includes all the non-rechargeable batteries and the first main battery, and all the second target batteries are ranked before all the remaining non-rechargeable batteries, and the first main battery is ranked after all the non-rechargeable batteries; For any remaining non-rechargeable battery except the second target battery, determine a first reference total power of the remaining non-rechargeable battery; wherein the first reference total power is the sum of the rated powers of all the batteries in the first battery sequence except the target non-rechargeable battery; For any remaining non-rechargeable battery except the second target battery, determine a first output power from the first load power to be allocated; wherein the first load power to be allocated is the portion of the load power except the maximum power of all the target non-rechargeable batteries, and the ratio of the first output power to the first load power to be allocated is equal to the ratio of the rated power of the remaining non-rechargeable battery to the first reference total power; Each of the remaining non-rechargeable batteries is controlled by a corresponding bidirectional DCDC to output constant power at the corresponding first output power.

4. The battery control method according to claim 3, characterized in that: After determining whether the first total rated power of the battery pack is less than the load power, the method further includes: When the first total rated power is greater than or equal to the load power, for each of the non-rechargeable batteries, determining a second output power of the non-rechargeable battery; wherein a ratio of the second output power to the corresponding rated power is equal to a ratio of the load power to the first total rated power; Each of the non-rechargeable batteries is controlled by a corresponding bidirectional DCDC to output constant power at the corresponding second output power.

5. The battery control method according to claim 2, characterized in that: After the rechargeable battery with the largest remaining capacity among all the rechargeable batteries is used as the first main battery, the method further includes: When the first total maximum power of all the non-rechargeable batteries is less than the load power, and the second total maximum power of all the rechargeable batteries and all the non-rechargeable batteries is greater than or equal to the load power, sorting all the remaining rechargeable batteries except the first main battery among all the rechargeable batteries from large to small according to the remaining capacity to obtain a sequence of remaining rechargeable batteries; For any remaining rechargeable battery in the sequence of remaining rechargeable batteries, determining all target rechargeable batteries that are arranged before the remaining rechargeable battery; For any remaining rechargeable battery in the remaining rechargeable battery sequence, determining a reference total remaining capacity of the remaining rechargeable battery; the reference total remaining capacity is the sum of the remaining capacities of all rechargeable batteries in the remaining rechargeable battery sequence except all the target rechargeable batteries and the remaining capacity of the first main battery; For any remaining rechargeable battery in the remaining rechargeable battery sequence, a third output power is determined from the second load power to be allocated; the ratio of the third output power to the second load power to be allocated is equal to the ratio of the corresponding remaining capacity to the reference total remaining capacity; the second load power to be allocated is the portion of the load power excluding the first total maximum power and the maximum power of all the target rechargeable batteries; The first main battery is controlled by the corresponding bidirectional DCDC to perform constant voltage discharge according to the DC bus voltage, and each non-rechargeable battery is controlled by the corresponding bidirectional DCDC to perform constant power discharge based on the corresponding maximum power. For any remaining rechargeable battery in the remaining rechargeable battery sequence, when the third output power is greater than or equal to the corresponding maximum power, the remaining rechargeable battery is controlled by the corresponding bidirectional DCDC to perform constant power output at the corresponding maximum power; when the third output power is less than the corresponding maximum power, the remaining rechargeable battery is controlled by the corresponding bidirectional DCDC to perform constant power output at the third output power.

6. The battery control method according to claim 1, characterized in that: When the battery pack includes a plurality of non-rechargeable batteries, in the discharge process, the total charge-discharge state parameter is the second total rated power of all the non-rechargeable batteries; When the total charge and discharge state parameter does not match the external charge and discharge parameter, selecting at least one target battery from the battery pack includes: When the second total rated power is less than the load power, marking the non-rechargeable battery with the largest rated power among all the non-rechargeable batteries as the second main battery, and marking the non-rechargeable batteries other than the second main battery as pending batteries; Marking the undetermined battery with the smallest maximum power as the third target battery; Assigning the rated power of the third target battery to the maximum power corresponding to the third target battery; Recalculating the second total rated power of all the non-rechargeable batteries to obtain a second total power recalculation result; In the case that the recalculated result of the second total power is less than the load power, among all the remaining batteries to be determined except the third target battery, the remaining battery to be determined with the smallest maximum power is marked as the third target battery to serve as the target battery; Return to the step of assigning the rated power of the third target battery to the maximum power corresponding to the third target battery until the recalculated result of the second total power is greater than or equal to the load power; For any remaining undetermined battery except the third target battery, determining a fourth output power based on a preset charge and discharge balancing strategy; The controlling each of the remaining batteries to charge and discharge based on a charge and discharge balancing strategy through the bidirectional DCDC corresponding to each of the remaining batteries includes: Any of the remaining pending batteries except the third target battery is controlled by the corresponding bidirectional DCDC to perform constant power discharge at the corresponding fourth output power.

7. The battery control method according to claim 6, characterized in that: The determining the fourth output power based on the preset charge-discharge balancing strategy includes: Determine a target battery to be determined from a second battery sequence that is ranked before the remaining batteries to be determined; the second battery sequence includes all the non-rechargeable batteries, and all the third target batteries are ranked before all the remaining batteries to be determined, and the second main battery is ranked at the end; Determine a second reference total power of the remaining batteries to be determined; the second reference total power is the sum of the rated powers of all the non-rechargeable batteries in the second battery sequence except the target battery to be determined; The fourth output power is determined from the third load power to be allocated; wherein the third load power to be allocated is the part of the load power excluding the maximum power of all the third target batteries and the maximum power of the target battery to be determined; and the ratio of the fourth output power to the third load power to be allocated is equal to the ratio of the rated power of the remaining batteries to be determined to the second reference total power.

8. The battery control method according to claim 6, characterized in that: After obtaining the total charge and discharge state parameters and external charge and discharge parameters of the battery pack, the method further includes: When the second total rated power is greater than or equal to the load power, marking the non-rechargeable battery with the largest rated power among all non-rechargeable batteries as a third main battery, and marking the batteries other than the third main battery as first sub-batteries; The third main battery is controlled by the corresponding bidirectional DCDC to perform constant voltage discharge at the DC bus voltage, and each of the first subsidiary batteries is controlled by the corresponding bidirectional DCDC to perform constant power discharge according to the corresponding fifth output power; wherein the ratio of the fifth output power of any first subsidiary battery to the load power is equal to the ratio of the rated power of any first subsidiary battery to the second total rated power.

9. An electric vehicle ground support equipment, characterized in that: The electric vehicle ground support equipment comprises: Movable vehicles; A DC bus and a battery pack, wherein the DC bus and the battery pack are both arranged on the movable carrier, the battery pack comprises a plurality of batteries connected in parallel, and the batteries are connected to the DC bus through a bidirectional DC converter DCDC; A control module, wherein the control module is disposed on the movable carrier, and the control module is respectively connected to each of the batteries and each of the two-way DCDC communications, and the control module comprises: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the computer program is configured to implement the steps of the battery control method as described in any one of claims 1 to 8.

10. The electric vehicle ground support equipment according to claim 9, characterized in that: A parallel supply and discharge main circuit and a pre-charge branch are arranged between the battery and the bidirectional DCDC. The supply and discharge main circuit includes a first contactor and a fuse. The pre-charge branch includes a pre-charge resistor and a second contactor connected in series. The second contactor is used to turn on or off the pre-charge branch.

11. The electric vehicle ground support equipment according to claim 9, characterized in that: Also includes: An electric energy driving module, the electric energy driving module is arranged on the movable carrier and is used to drive the movable carrier to move; An external charging module, the external charging module is arranged on the movable vehicle, and the external charging module is used to charge the battery pack of the electric vehicle; Among them, the DC bus is connected to the electric energy driving module and the external charging module respectively, the battery is detachably connected to the movable carrier, and the specifications of the battery are consistent with the specifications of the battery pack.

12. The electric vehicle ground support equipment according to claim 11, characterized in that: The external charging module comprises: A charging pile body, the charging pile body is arranged on the movable vehicle, and the charging pile body is detachably connected to the electric vehicle through a pipeline; A thermal management module is arranged on the movable vehicle, and the thermal management module is constructed to be connected with the battery cavity of the electric vehicle to form a battery heat exchange branch when the charging pile body is connected to the electric vehicle, so that the insulating heat exchange fluid in the thermal management module can flow in the battery heat exchange branch and fill the battery cavity.

13. The electric vehicle ground support equipment according to claim 12, characterized in that: The charging pile body has a device cavity, and a charging module is arranged in the device cavity; The thermal management module is also configured to communicate with the device cavity to form a device heat exchange branch, so that the insulating heat exchange fluid can flow in the device heat exchange branch and fill the device cavity.

14. The electric vehicle ground support equipment according to claim 13, characterized in that: The thermal management module includes a main circuit, which includes a medium storage box, a pump, and a heat exchanger that are sequentially connected through pipelines; The device heat exchange branch and the battery heat exchange branch are connected in parallel and then in series to the main circuit to form a circulation loop; or, the device heat exchange branch, the battery heat exchange branch and the main circuit are connected in series to form a circulation loop.

15. The electric vehicle ground support equipment according to claim 12, characterized in that: A cooling channel is defined in at least one of the control module, the electric energy drive module and the battery, and the thermal management module is connected to the cooling channel so that the insulating heat exchange fluid can flow in the cooling channel.

16. The electric vehicle ground support equipment according to claim 11, characterized in that: The movable vehicle comprises a carriage, the external charging module and the battery are both arranged in the carriage, and a heat dissipation hole is provided at a position of a side wall of the carriage corresponding to the external charging module; The movable carrier also includes a rainproof component, which is arranged at the heat dissipation hole.

17. The electric vehicle ground support equipment according to claim 16, characterized in that: The side wall of the carriage is also provided with a battery access hole and a charging gun access hole, wherein the battery access hole is for the battery to pass through, and the charging gun access hole is for the charging gun of the external charging module to pass through; the movable carrier further comprises a first cover member and a second cover member, wherein the first cover member can be opened and closed at the battery access hole to open or close the battery access hole, and the second cover member can be opened and closed at the charging gun access hole to open or close the charging gun access hole; and / or The external charging module has a battery debugging interface, and a battery debugging position is also defined in the carriage, and the battery debugging position is arranged adjacent to the external charging module. The side wall of the carriage is provided with a hatch opening facing the battery debugging position, and the movable vehicle also includes a debugging hatch, which is arranged at the hatch opening to open or close the hatch opening, and the debugging hatch is used for allowing the battery to pass through.

18. The electric vehicle ground support equipment according to claim 16, characterized in that: The inner wall of the carriage is provided with a fireproof layer, and the fireproof layer is constructed as an aerogel fireproof coating or a fireproof paint layer; and / or The movable vehicle also includes a fire extinguishing component, which is arranged in the vehicle compartment and is a perfluorohexanone spray component.

19. The electric vehicle ground support equipment according to claim 16, characterized in that: The movable vehicle further comprises: a chassis, wherein the carriage is provided on the chassis; A traction rod is arranged at one end of the chassis in the length direction.

20. A storage medium, characterized in that: The storage medium is a computer-readable storage medium, and a computer program is stored on the storage medium. When the computer program is executed by a processor, the steps of the battery control method according to any one of claims 1 to 8 are implemented.

21. A computer program product, characterized in that The computer program product comprises a computer program, and when the computer program is executed by a processor, the steps of the battery control method according to any one of claims 1 to 8 are implemented.

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