On-board power supply, battery assembly, device, method, equipment, medium and vehicle

Abstract

The present invention discloses a vehicle-mounted power supply, a battery assembly, a device, a method, an equipment, a medium and a vehicle. The vehicle-mounted power supply comprises: a battery module, the battery module is suitable for constituting a battery assembly of a vehicle and can be detached from the battery assembly; an electric energy output circuit, the input end of the electric energy output circuit is connected to the battery module, the output end of the electric energy output circuit is suitable for connecting an external load of the vehicle, and the electric energy output circuit is used to convert the output voltage of the battery module and supply power to the external load of the vehicle when the battery module is in a detached state.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a vehicle-mounted power supply, a battery assembly, a device, a method, equipment, a medium and a vehicle. Background Art

[0002] With the development of vehicle technology, more and more vehicles use power batteries as a power source.

[0003] The battery assembly currently used in vehicles or other electric equipment includes multiple battery cells. When these battery cells are not supplying power to the vehicle's power load and / or non-power load, they are in an idle state and are not fully utilized. When the owner needs to use electricity outside the vehicle, the owner needs to find or equip another power source. Summary of the invention

[0004] Embodiments of the present invention provide a vehicle-mounted power supply, a battery assembly, a device, a method, a device, a medium and a vehicle to solve the problem that the battery assembly in the existing equipment cannot take into account the external power demand of the equipment.

[0005] A vehicle-mounted power supply, comprising:

[0006] A battery module, the battery module is suitable for constituting a battery assembly of a vehicle and is detachable from the battery assembly;

[0007] An electric energy output circuit, wherein the input end of the electric energy output circuit is connected to the battery module, the output end of the electric energy output circuit is suitable for connecting to an external load, and the electric energy output circuit is used to convert the output voltage of the battery module to supply power to the external load when the battery module is in a disassembled state.

[0008] Preferably, the electric energy output circuit comprises: a first switch tube, a second switch tube, a first inductor and an energy storage capacitor;

[0009] The first switch tube and the second switch tube are arranged in series between the first input terminal and the first output terminal of the electric energy output circuit;

[0010] The first end of the first inductor is connected to the connection node between the first switch tube and the second switch tube, and the second end of the first inductor is connected to the second input end and the second output end of the power output circuit;

[0011] Two ends of the energy storage capacitor are respectively connected to the first output end and the second output end of the electric energy output circuit.

[0012] Preferably, the electric energy output circuit further includes:

[0013] A first filter capacitor, wherein two ends of the first filter capacitor are respectively connected to a first input end and a second input end of the electric energy output circuit.

[0014] Preferably, the battery module comprises a plurality of battery cells, and the plurality of battery cells are connected in series in sequence;

[0015] The first input terminal and the second input terminal of the electric energy output circuit are connected to two ends of the battery module respectively.

[0016] A battery assembly, comprising:

[0017] Multiple battery modules;

[0018] An assembly structure, wherein at least one of the battery modules can be detached from the battery assembly through the assembly structure.

[0019] Preferably, the battery assembly comprises:

[0020] A plurality of the battery modules, wherein the plurality of the battery modules are connected in series;

[0021] A plurality of first switches are provided, and two ends of each battery module detachable from the battery assembly are connected in parallel with a first switch.

[0022] Preferably, the battery assembly further includes:

[0023] A first switch circuit, a second switch circuit and a first voltage conversion circuit;

[0024] The two input ends of the first voltage conversion circuit are connected to the two ends of any one of the plurality of battery modules through a first switch circuit;

[0025] The two output ends of the first voltage conversion circuit are connected to the two ends of each battery module detachable from the battery assembly through a second switch circuit.

[0026] Preferably, the first voltage conversion circuit includes a first transformer, a third switch tube, a fourth switch tube and a fifth switch tube;

[0027] The first end of the first winding of the first transformer is connected to the first switch circuit through the third switch tube;

[0028] The first end of the second winding of the first transformer is connected to the second switch circuit through the fourth switch tube;

[0029] The second end of the second winding of the first transformer is connected to the second switch circuit through the fifth switch tube.

[0030] Preferably, the first voltage conversion circuit further includes a second filter capacitor, and two ends of the second filter capacitor are connected to two output ends of the first voltage conversion circuit.

[0031] A power supply device comprises a first battery assembly and a second battery assembly;

[0032] The first battery assembly includes the above-mentioned battery assembly;

[0033] The second battery assembly is connected to the first battery assembly and is used to replenish energy to the disassembled battery module when the disassembled battery module of the first battery assembly is assembled back to a preset position.

[0034] Preferably, the second battery assembly includes the above-mentioned battery assembly.

[0035] Preferably, the power supply device further comprises a second voltage conversion circuit;

[0036] The second voltage conversion circuit is connected to the first battery assembly and the second battery assembly, and is used to convert the voltage output by the second battery assembly to the disassembled battery module.

[0037] Preferably, either one of the first battery assembly and the second battery assembly is a high-voltage battery assembly, and the other is a low-voltage battery assembly;

[0038] The second voltage conversion circuit includes a second transformer, a first rectifier circuit and a second rectifier circuit;

[0039] The first winding of the second transformer is connected to the high-voltage battery assembly through the first rectifier circuit;

[0040] The second winding of the second transformer is connected to the low-voltage battery assembly through the second rectifier circuit.

[0041] Preferably, the first rectifier circuit is a full-bridge rectifier circuit, and the full-bridge rectifier circuit includes a first bridge arm and a second bridge arm;

[0042] The first end of the first bridge arm and the first end of the second bridge arm are both connected to the first end of the high-voltage battery assembly;

[0043] The second end of the first bridge arm and the second end of the second bridge arm are both connected to the second end of the high-voltage battery assembly;

[0044] A midpoint of the first bridge arm and a midpoint of the second bridge arm are respectively connected to two ends of the first winding of the second transformer.

[0045] Preferably, the first rectifier circuit is a half-bridge rectifier circuit, and the half-bridge rectifier circuit includes a third bridge arm;

[0046] The first end of the third bridge arm and the midpoint of the third bridge arm are respectively connected to two ends of the high-voltage battery assembly;

[0047] The second end of the third bridge arm and the midpoint of the third bridge arm are respectively connected to the two ends of the first winding of the second transformer.

[0048] Preferably, the second rectifier circuit is a synchronous rectifier circuit, and the synchronous rectifier circuit includes a fourth bridge arm;

[0049] Two ends of the fourth bridge arm are respectively connected to two ends of the second winding of the second transformer;

[0050] The midpoint of the fourth bridge arm and the middle tap of the second winding of the second transformer are respectively connected to the two ends of the low-voltage battery assembly.

[0051] Preferably, the second voltage conversion circuit further includes a third filter capacitor, and two ends of the third filter capacitor are respectively connected to two ends of the second rectifier circuit.

[0052] A battery control method is applied to the above battery assembly, the battery control method comprising:

[0053] Determine, based on first measured data corresponding to the plurality of battery modules, the disassembled battery modules and the remaining battery modules among the plurality of battery modules;

[0054] The remaining battery modules are controlled to supply power to the battery assembly.

[0055] Preferably, the plurality of battery modules of the battery assembly are connected in series, the battery assembly further comprises a plurality of first switches, and both ends of each battery module detachable from the battery assembly are connected in parallel with one of the first switches; the battery control method further comprises:

[0056] The first switch corresponding to the removed battery module and the first switch corresponding to the remaining battery module are controlled to operate.

[0057] Preferably, before determining the disassembled battery modules and remaining battery modules of the battery assembly, the method further comprises:

[0058] The current state of the battery assembly is determined based on the first measured data corresponding to the plurality of battery modules, where the current state is a disassembled state or a replaced state.

[0059] Preferably, the first measured data includes a measured voltage;

[0060] The determining the current state of the battery assembly based on the first measured data corresponding to the plurality of battery modules includes:

[0061] When an open circuit voltage exists in the measured voltages corresponding to the plurality of battery modules, determining that the battery assembly is in the disassembled state;

[0062] When there is no open circuit voltage among the measured voltages corresponding to the plurality of battery modules and the preset placement conditions are met, it is determined that the battery assembly is in the placed-back state.

[0063] Preferably, the preset pick-and-place condition is that a measured voltage change corresponding to the measured voltage is greater than a preset voltage change.

[0064] Preferably, controlling the first switch corresponding to the removed battery module and the first switch corresponding to the remaining battery module to operate includes:

[0065] When the current state is a disassembled state, controlling the first switch corresponding to the disassembled battery module to be turned on, and controlling the first switches corresponding to the remaining battery modules to be turned off;

[0066] When the current state is the put-back state, the first switch corresponding to the removed battery module is controlled to be disconnected, and the first switches corresponding to the remaining battery modules are controlled to be disconnected.

[0067] Preferably, before controlling the first switch corresponding to the removed battery module to be disconnected and controlling the first switches corresponding to the remaining battery modules to be disconnected, the battery control method further includes:

[0068] The disassembled battery modules are recharged until the second measured data corresponding to the multiple battery modules meet the recharge completion condition.

[0069] Preferably, the step of replenishing energy for the disassembled battery module comprises:

[0070] The remaining battery modules are controlled to replenish energy for the removed battery modules.

[0071] Preferably, the battery assembly further comprises a first switch circuit, a second switch circuit and a first voltage conversion circuit; two input ends of the first voltage conversion circuit are connected to two ends of any battery module among the plurality of battery modules through the first switch circuit; two output ends of the first voltage conversion circuit are connected to two ends of each battery module detachable from the battery assembly through the second switch circuit;

[0072] The controlling the remaining battery modules to replenish the removed battery modules includes:

[0073] Control the first switches K1 corresponding to the plurality of battery modules to be disconnected, control the first switch circuits corresponding to the remaining battery modules to be turned on, control the second switch circuits corresponding to the removed battery modules to be turned on, and control the first voltage conversion circuit to work, so that the remaining battery modules replenish energy for the removed battery modules.

[0074] Preferably, the second measured data includes measured electrical quantity;

[0075] The energy replenishment completion condition is that the absolute value of the measured power difference is less than the preset power difference threshold;

[0076] The absolute value of the measured power difference is the difference between the measured power of the remaining battery module and the measured power of the removed battery module.

[0077] A power supply control method is applied to the above power supply device, and the power supply control method includes:

[0078] Determining that the current state of the first battery assembly is a returned state;

[0079] Control the second battery assembly to replenish energy for the first battery assembly.

[0080] Preferably, before determining that the current state of the first battery assembly is a put-back state, the method further includes:

[0081] A current state of the first battery assembly is determined based on first measured data of the first battery assembly, where the current state is a disassembled state or a replaced state.

[0082] Preferably, controlling the second battery assembly to replenish energy for the first battery assembly includes:

[0083] The second battery assembly is controlled to recharge the removed battery module of the first battery assembly until the second measured data of the first battery assembly meets the recharging completion condition.

[0084] Preferably, the energy replenishment completion condition is that the measured power of the removed battery module of the first battery assembly reaches the target power;

[0085] The target power is determined based on an average of the measured power of the remaining battery modules of the first battery assembly.

[0086] Preferably, the plurality of battery modules of the first battery assembly are connected in series, and the first battery assembly further comprises a plurality of first switches, and two ends of each battery module detachable from the battery assembly are connected in parallel with one of the first switches;

[0087] Before controlling the second battery assembly to replenish the first battery assembly, the power supply control method further includes:

[0088] The first switch corresponding to the removed battery module of the first battery assembly is controlled to be disconnected, and the first switch corresponding to the remaining battery modules of the first battery assembly is controlled to be turned on.

[0089] Preferably, the controlling the second battery assembly to replenish the first battery assembly further includes:

[0090] The second voltage conversion circuit disposed between the first battery assembly and the second battery assembly is controlled to operate, the output voltage of the second battery assembly is converted, and the converted voltage is used to replenish energy for the disassembled battery module in the first battery assembly.

[0091] An electronic device comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor implements the above-mentioned battery control method or the above-mentioned power supply control method when executing the computer program.

[0092] A computer-readable storage medium stores a computer program, wherein the computer program implements the battery control method or the power supply control method when executed by a processor.

[0093] A vehicle comprises the above-mentioned battery assembly, the above-mentioned power supply device, the above-mentioned electronic device or the above-mentioned computer-readable storage medium.

[0094] The above-mentioned vehicle-mounted power supply, battery assembly, device, method, equipment, medium and vehicle can integrate the power output circuit with the battery module removed from the battery assembly, reuse the vehicle power supply as a mobile power supply to power external loads, so as to ensure the convenience of charging the external loads. BRIEF DESCRIPTION OF THE DRAWINGS

[0095] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0096] Figure 1 is a circuit diagram of a vehicle-mounted power supply in one embodiment of the present invention;

[0097] Figure 2 is a circuit diagram of an electric energy output circuit in one embodiment of the present invention;

[0098] Figure 3 is a first circuit schematic diagram of a battery assembly in one embodiment of the present invention;

[0099] Figure 4 is a second circuit schematic diagram of a battery assembly in one embodiment of the present invention;

[0100] Figure 5 yes Figure 4 A circuit diagram of a first voltage conversion circuit;

[0101] Figure 6 is a first circuit diagram of a power supply device in one embodiment of the present invention;

[0102] Figure 7 is a second circuit diagram of a power supply device in one embodiment of the present invention;

[0103] Figure 8 yes Figure 7 A circuit diagram of a second voltage conversion circuit in FIG.

[0104] In the figure: 10, vehicle power supply; 1, battery module; 2, power output circuit; G11, first switch tube; G12, second switch tube; L11, first inductor; C11, first filter capacitor; C12, energy storage capacitor; 20, battery assembly; 3, first switch circuit; 4, second switch circuit; 5, first voltage conversion circuit; K1, first switch; T1, first transformer; G21, third switch tube; G22, fourth switch tube; G23, fifth switch tube; C21, second filter capacitor; 30, power supply device; 31, first battery assembly; 32, second battery assembly; 33, second voltage conversion circuit; T2, second transformer; 331, first rectifier circuit; 332, second rectifier circuit; G31, first transistor; G32, second transistor; G33, third transistor; G34, fourth transistor; G35, fifth transistor; G36, sixth transistor; C31, third filter capacitor. DETAILED DESCRIPTION

[0105] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0106] It should be understood that the present invention can be implemented in different forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, providing these embodiments will make the disclosure thorough and complete and fully convey the scope of the present invention to those skilled in the art. In the accompanying drawings, the sizes and relative sizes of layers and regions may be exaggerated for clarity. The same reference numerals throughout represent the same elements.

[0107] It should be understood that when an element or layer is referred to as being "on, adjacent to, connected to or coupled to other elements or layers, it may be directly on, adjacent to, connected to or coupled to other elements or layers, or there may be intervening elements or layers. In contrast, when an element is referred to as being "directly on, directly adjacent to, directly connected to or directly coupled to other elements or layers, there may be no intervening elements or layers. It should be understood that, although the terms first, second, third, etc. may be used to describe various elements, components, regions, layers and / or parts, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the teachings of the present invention, the first element, component, region, layer or part discussed below may be represented as a second element, component, region, layer or part.

[0108] Spatially relative terms such as "under," "beneath," "below," "under," "above," "above," and the like may be used herein for ease of description to describe the relationship of an element or feature shown in the figures to other elements or features. It should be understood that the spatially relative terms are intended to include different orientations of the device in use and operation in addition to the orientations shown in the figures. For example, if the device in the accompanying drawings is flipped, then the elements or features described as "under other elements" or "under" or "under" will be oriented as "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatial descriptors used herein are interpreted accordingly.

[0109] The purpose of the terms used herein is only to describe specific embodiments and is not intended to be limiting of the present invention. When used herein, the singular forms "one", "an" and "said / the" are also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "consisting of" and / or "comprising", when used in this specification, determine the presence of the features, integers, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, parts and / or groups. When used herein, the term "and / or" includes any and all combinations of the relevant listed items.

[0110] In order to fully understand the present invention, detailed structures and steps will be presented in the following description to illustrate the technical solutions proposed by the present invention. The preferred embodiments of the present invention are described in detail below, but in addition to these detailed descriptions, the present invention may also have other implementations.

[0111] The embodiment of the present invention provides a vehicle-mounted power supply 10, which is a power supply installed on a vehicle. Figure 1 As shown, the vehicle-mounted power supply 10 includes:

[0112] A battery module 1, wherein the battery module 1 is suitable for constituting a battery assembly 20 of a vehicle and is detachable from the battery assembly 20;

[0113] The power output circuit 2 has an input end connected to the battery module 1, and an output end suitable for connecting to an external load. The power output circuit 2 is used to convert the output voltage of the battery module 1 to supply power to the external load when the battery module 1 is in a disassembled state.

[0114] As an example, the vehicle-mounted power supply 10 includes a battery module 1 and an electric energy output circuit 2. The battery module 1 is suitable for constituting a battery assembly 20 of a vehicle and can be detached from the battery assembly 20. That is to say, the battery assembly 20 on the vehicle includes a detachably connected battery module 1, which can be removed from the battery assembly 20 of the vehicle according to actual needs and used as a mobile power source. The input end of the electric energy output circuit 2 is connected to the battery module 1, and the output end of the electric energy output circuit 2 is connected to an external load. When the battery module 1 is in a disassembled state, the output voltage of the battery module 1 is converted to provide the external load with the voltage required for its operation. In practical applications, the electric energy output circuit 2 can be integrated with the battery module 1 removed from the battery assembly 20 to supply power to the external load as a mobile power source to ensure the convenience of charging the external load.

[0115] In one embodiment, if Figure 2 As shown, the electric energy output circuit 2 includes: a first switch tube G11, a second switch tube G12, a first inductor L11 and an energy storage capacitor C12;

[0116] The first switch tube G11 and the second switch tube G12 are arranged in series between the first input terminal Vi1 and the first output terminal Vo1 of the power output circuit 2;

[0117] The first end of the first inductor L11 is connected to the connection node between the first switch tube G11 and the second switch tube G12, and the second end of the first inductor L11 is connected to the second input end Vi2 and the second output end Vo2 of the power output circuit 2;

[0118] Two ends of the energy storage capacitor C12 are respectively connected to the first output terminal Vo1 and the second output terminal Vo2 of the power output circuit 2 .

[0119] The first switch tube G11 and the second switch tube G12 are two switch tubes arranged in the power output circuit 2, which may be but not limited to MOS tubes. The first inductor L11 is a component in the power output circuit 2 for realizing voltage conversion, accumulating and releasing current, which may be but not limited to a power inductor.

[0120] As an example, the first end of the first switch tube G11 is connected to the first input end Vi1 of the power output circuit 2, the second end of the first switch tube G11 is connected to the first end of the second switch tube G12, and the second end of the second switch tube G12 is connected to the first output end Vo1 of the power output circuit 2; the first end of the first inductor L11 is connected to the connection node between the second end of the first switch tube G11 and the first end of the second switch tube G12, and the second end of the first inductor L11 is connected to the second input end Vi2 and the second output end Vo2 of the power output circuit 2; the two ends of the energy storage capacitor C12 are respectively connected to the first output end Vo1 of the power output circuit 2 and the second output terminal Vo2; when the two input terminals of the electric energy output circuit 2 are connected to the battery unit, and the two output terminals of the electric energy output circuit 2 are connected to the external load, the electric energy output circuit 2 performs a voltage conversion process, and needs to alternately perform the following two steps: (1) when the first switch tube G11 is turned on and the second switch tube G12 is turned off, the battery unit charges the first inductor L11, and the energy storage capacitor C12 supplies power to the external load; (2) when the first switch tube G11 is turned off and the second switch tube G12 is turned on, due to the characteristic that the inductor current of the first inductor L11 cannot change suddenly, the first inductor L11 supplies power to the energy storage capacitor C12 and the external load.

[0121] In this embodiment, the conduction or disconnection of the first switch tube G11 and the second switch tube G12 in the power output circuit 2 is staggered to control the power output circuit 2 to convert the output voltage of the battery unit to provide the external load with the voltage required for its operation; in practical applications, the power output circuit 2 can be integrated with any battery unit in the battery assembly 20 to serve as a mobile power source to power the external load to ensure the convenience of charging the external load.

[0122] In one embodiment, the electric energy output circuit 2 further includes:

[0123] The first filter capacitor C11 has two ends connected to the first input terminal Vin1 and the second input terminal Vi2 of the power output circuit 2 respectively.

[0124] As an example, the power output circuit 2 also includes a first filter capacitor C11, and the two ends of the first filter capacitor C11 are respectively connected to the first input end Vi1 and the second input end Vi2 of the power output circuit 2. When the first input end Vi1 and the second input end Vi2 of the power output circuit 2 are respectively connected to the two ends of the battery unit, the first filter capacitor C11 can filter the input voltage of the battery unit.

[0125] In one embodiment, the battery module 1 includes a plurality of battery cells, and the plurality of battery cells are connected in series in sequence;

[0126] The first input terminal Vin1 and the second input terminal Vin2 of the power output circuit 2 are connected to two ends of the battery module 1 respectively.

[0127] As an example, the battery module 1 includes multiple battery cells, which are connected in series in sequence; the head and tail ends of the multiple battery cells are respectively connected to the two input ends of the power output circuit 2, so that the multiple battery cells can be used to supply power to the external load through the power output circuit 2 to ensure the convenience of charging the external load. The two input ends of the power output circuit 2 are respectively connected to the two ends of the battery module 1, and the two output ends of the power output circuit 2 are respectively connected to the external load. When the battery module 1 is needed to supply power to the external load, the first switch tube G11 and the second switch tube G12 in the power output circuit 2 are alternately controlled to be turned on or off, so that the power output circuit 2 converts the output voltage of the battery module 1 to provide the external load with the voltage required for its operation. Specifically, the following two steps are alternately performed: (1) when the first switch tube G11 is turned on and the second switch tube G12 is turned off, the battery module 1 charges the first inductor L11 and the energy storage capacitor C12 supplies power to the external load; (2) when the first switch tube G11 is turned off and the second switch tube G12 is turned on, due to the characteristic that the inductor current of the first inductor L11 cannot change suddenly, the first inductor L11 supplies power to the energy storage capacitor C12 and the external load. In this example, the battery module 1 and the power output circuit 2 are integrated into one to form the battery module 1. The battery module 1 can be used as a mobile power source to supply power to the external load connected thereto, thereby ensuring the convenience of charging the external load.

[0128] An embodiment of the present invention provides a battery assembly 20, including:

[0129] A plurality of battery modules 1;

[0130] An assembly structure, wherein at least one of the battery modules 1 can be detached from the battery assembly 20 through the assembly structure.

[0131] The assembly structure is a structure that allows the battery module 1 to be detachably installed. In practical applications, the power output circuit 2 can be integrated with the battery module 1 removed from the battery assembly 20 to serve as a mobile power source to supply power to the external loads, thereby ensuring the convenience of charging the external loads.

[0132] An embodiment of the present invention provides a battery assembly 20, such as Figure 3 As shown, the battery assembly 20 includes:

[0133] A plurality of the battery modules 1, wherein the plurality of the battery modules 1 are connected in series;

[0134] A plurality of first switches K1 are provided, and two ends of each battery module 1 detachable from the battery assembly are connected in parallel with a first switch K1 .

[0135] As an example, the battery assembly 20 includes a plurality of battery modules 1, a plurality of first switches K1 and an assembly structure. At least one of the battery modules 1 can be detached from the battery assembly 20 through the assembly structure. According to actual conditions, at least one battery module 1 can be detached and used as a mobile power source, so that the detached battery module 1 can directly supply power to the external load connected to it, ensuring the convenience of charging the external load. The plurality of battery modules 1 are connected in series, and the two ends of each battery module 1 detachable from the battery assembly are connected in parallel with one of the first switches. According to actual conditions, the conduction or disconnection of the first switch K1 can be controlled, so that the basic functions of the battery assembly 20 can be guaranteed to be unaffected before and after the battery module 1 of the battery assembly 20 is disassembled. For the convenience of description, the detached battery module is the battery module 1 detached from the battery assembly 20 and is determined as the detached battery module; accordingly, the battery modules 1 in the battery assembly 20 other than the detached battery module are determined as the remaining battery modules.

[0136] For example, when it is necessary to remove some battery modules 1 from the battery assembly 20 as a mobile power source to supply power to external loads, these battery modules 1 can be removed from the battery assembly 20 and determined as the removed battery modules. The first switch K1 corresponding to the removed battery modules is controlled to be turned on, and the first switch K1 corresponding to the remaining battery modules is controlled to be turned off, so that the battery cells corresponding to the remaining battery modules can be connected in series through the first switch K1 as a whole to supply power to the outside, so as to ensure that the basic functions of the battery assembly 20 are not affected; accordingly, when the removed battery modules are reinstalled into the preset position corresponding to the battery assembly 20, the first switch K1 corresponding to the removed battery modules is controlled to be turned off, and the first switch K1 corresponding to the remaining battery modules is controlled to be turned off, so that the removed battery modules and the remaining battery modules are connected in series as a whole to supply power to the outside.

[0137] In this example, at least one of the battery modules 1 is detachable from the battery assembly 20 through the assembly structure, so that each battery module 1 can be detached and used as a mobile power source to ensure the convenience of charging the load outside the vehicle; moreover, both ends of each battery module 1 detachable from the battery assembly are connected in parallel with one of the first switches K1, and the conduction or disconnection of multiple first switches K1 is controlled to ensure that the basic functions of the battery assembly 20 are not affected before and after the battery module 1 is disassembled.

[0138] In one embodiment, if Figure 4 As shown, the battery assembly 20 also includes:

[0139] A first switch circuit 3, a second switch circuit 4 and a first voltage conversion circuit 5;

[0140] The two input ends of the first voltage conversion circuit 5 are connected to two ends of any one of the battery modules 1 through the first switch circuit 3;

[0141] The two output ends of the first voltage conversion circuit 5 are connected to the two ends of each battery module 1 detachable from the battery assembly through the second switch circuit 4 .

[0142] As an example, the two input ends of the first voltage conversion circuit 5 are connected to the two ends of any of the battery modules 1 in the plurality of battery modules 1 through the first switch circuit 3, so that any of the battery modules 1 in the plurality of battery modules 1 can be connected to the first voltage conversion circuit 5 to output energy. Correspondingly, the two output ends of the first voltage conversion circuit 5 are connected to the two ends of each battery module 1 detachable from the battery assembly through the second switch circuit 4, so that when each battery module 1 detachable from the battery assembly is reinstalled to the preset position corresponding to the battery assembly 20, the first voltage conversion circuit 5 can be used to replenish energy to the detached battery module.

[0143] The first switch circuit 3 and the second switch circuit 4 are in a normally open state. When some of the battery modules 1 in the battery assembly 20 are removed and used as a mobile power source, the first switch K1 corresponding to the removed battery module can be controlled to be turned on, and the first switch K1 corresponding to the remaining battery module can be turned off, so that the battery cells corresponding to the remaining battery modules can be connected in series through the first switch K1 to form a whole for external power supply; when the removed battery module is reinstalled into the preset position corresponding to the battery assembly 20, the first switches K1 corresponding to all the battery modules 1 are controlled to be turned off, so that all the battery cells in the battery assembly 20 are connected in series to form a loop, and then the first switch circuit 3 between the two input ends of the first voltage conversion circuit 5 and the remaining battery modules is controlled to be turned on, and the two output ends of the first voltage conversion circuit 5 and the second switch circuit 4 between the removed battery modules are controlled to be turned on, so that the voltage output by the remaining battery modules is converted through the first voltage conversion circuit 5, and the removed battery modules can be replenished with energy.

[0144] In this example, the battery modules 1 in the battery assembly 20 are detachably connected, so that each battery module 1 can be removed and used as a mobile power source to meet the needs of charging external loads. Each battery module 1 is arranged in parallel with a first switch K1, which can ensure that the basic functions of the battery assembly 20 are not affected before and after each battery module 1 is removed; when the first switches K1 corresponding to all the battery modules 1 are disconnected, so that all the battery cells in the battery assembly 20 are connected in series to form a loop, the first switch circuit 3, the second switch circuit 4 and the first voltage conversion circuit 5 can be controlled to work, and the remaining battery modules in the battery assembly 20 can be used to replenish energy for the removed battery modules to ensure the balance of each battery cell in the battery assembly 20 to ensure the normal operation of the battery assembly 20.

[0145] In one embodiment, if Figure 5 As shown, the first voltage conversion circuit 5 includes a first transformer T1, a third switch tube G21, a fourth switch tube G22 and a fifth switch tube G23;

[0146] The first end of the first winding of the first transformer T1 is connected to the first switch circuit 3 through the third switch tube G21;

[0147] The first end of the second winding of the first transformer T1 is connected to the second switch circuit 4 through the fourth switch tube G22;

[0148] The second end of the second winding of the first transformer T1 is connected to the second switch circuit 4 through the fifth switch tube G23.

[0149] As an example, the first voltage conversion circuit 5 includes a first transformer T1, a third switch tube G21, a fourth switch tube G22 and a fifth switch tube G23. One end of the first winding of the first transformer T1 is connected to the first switch circuit 3 through the third switch tube G21, the first end of the second winding of the first transformer T1 is connected to the second switch circuit 4 through the fourth switch tube G22, and the second end of the second winding of the first transformer T1 is connected to the second switch circuit 4 through the fifth switch tube G23. The third switch tube G21, the fourth switch tube G22 and the fifth switch tube G23 can be controlled to be turned on or off so that they cooperate with the first transformer T1 to perform voltage conversion, thereby realizing the use of the remaining battery modules to replenish the energy of the disassembled battery modules.

[0150] In this example, the process of using the remaining battery modules to replenish energy for the disassembled battery modules is as follows: the first switches K1 corresponding to all the battery modules 1 are controlled to be disconnected, so that all the battery cells in the battery assembly 20 are connected in series to form a loop, and then the first switch circuit 3 between the remaining battery modules and the first winding of the first transformer T1 is controlled to be turned on, and the second switch circuit 4 between the disassembled battery module and the second winding of the first transformer T1 is controlled to be turned on, so that the direct current output by the remaining battery modules can be converted into a pulse current through the third switch tube G21, and the pulse current is input to the first transformer T1 for voltage conversion. The pulse current after the voltage conversion by the first transformer T1 is then converted into direct current through the staggered fourth switch tube G22 and the fifth switch tube G23. The direct current replenishes energy for the disassembled battery module through the turned-on second switch circuit 4, so as to realize the use of the remaining battery modules in the battery assembly 20 to replenish energy for the disassembled battery module, so as to ensure the balance of each battery cell in the battery assembly 20, so as to ensure the normal operation of the battery assembly 20.

[0151] In one embodiment, if Figure 5 As shown, the first voltage conversion circuit 5 further includes a second filter capacitor C21 , and two ends of the second filter capacitor C21 are connected to two output ends of the first voltage conversion circuit 5 .

[0152] As an example, the first voltage conversion circuit 5 also includes a second filter capacitor C21, and the two ends of the second filter capacitor C21 are respectively connected to the first output end Vo1 and the second output end Vo2 of the first voltage conversion circuit 5. When the two output ends of the power output circuit 2 are connected to the disassembled battery module through the second switching circuit 4, the output voltage of the first voltage conversion circuit 5 can be filtered.

[0153] In one embodiment, the first switch circuit 3 includes a plurality of second switches and a plurality of third switches, and the second switch circuit 4 includes a plurality of fourth switches and a plurality of fifth switches;

[0154] A first end of each of the second switches is connected to two adjacent battery modules 1, and a second end of the second switch is connected to a first end of a first winding of the first transformer T1;

[0155] A first end of each of the third switches is connected to two adjacent battery modules 1, and a second end of the third switch is connected to a second end of the first winding of the first transformer T1;

[0156] A first end of each of the fourth switches is connected to two adjacent battery modules 1, and a second end of the fourth switch is connected to a first end of the second winding of the first transformer T1;

[0157] The second end of each of the fifth switches is connected to two adjacent battery modules 1 , and the second end of the fifth switch is connected to the second end of the second winding of the first transformer T1 .

[0158] As an example, the first switch circuit 3 includes a plurality of second switches and a third switch, and the second switch circuit 4 includes a plurality of fourth switches and a plurality of fifth switches, and the two ends of each of the second switches are respectively connected to the first end of the first winding of two adjacent battery modules 1, the two ends of each of the third switches are respectively connected to the second end of the first winding of two adjacent battery modules 1, and the two ends of each of the fourth switches are respectively connected to the first end of the second winding of the first transformer T1, and the two ends of each of the fifth switches are respectively connected to the second end of the second winding of the first transformer T1. When the remaining battery module needs to be used to replenish the energy of the disassembled battery module, the second switch and the third switch at both ends of the remaining battery module can be controlled to be turned on, and the fourth switch and the fifth switch at both ends of the disassembled battery module can be controlled to be turned on, so that the two ends of the remaining battery module are connected to the first winding of the first transformer T1, and the second winding of the first transformer T1 is connected to the two ends of the disassembled battery module, so that the output voltage of the remaining battery module is converted by the first voltage conversion circuit 5, and the converted voltage is used to replenish the energy of the disassembled battery module.

[0159] In one embodiment, the battery assembly 20 further includes:

[0160] A controller connected to the plurality of first switches K1, for controlling the first switch K1 corresponding to the disassembled battery module to be turned on and the first switches K1 corresponding to the remaining battery modules to be turned off when the battery module 1 is disassembled; and for controlling the first switch K1 corresponding to the disassembled battery module to be turned off and the first switches K1 corresponding to the remaining battery modules to be turned off when the battery module 1 is installed back to a preset position.

[0161] As an example, the battery assembly 20 further includes a controller, which is connected to a plurality of first switches K1, and can control the operation of the plurality of first switches K1 according to actual conditions to ensure the normal operation of the battery assembly 20. For example, when it is necessary to remove part of the battery modules 1 from the battery assembly 20 as a mobile power source to supply power to the load outside the vehicle, the part of the battery modules 1 can be removed from the battery assembly 20, determined as the removed battery modules, and the first switches K1 corresponding to the removed battery modules are controlled to be turned on, and the first switches K1 corresponding to the remaining battery modules are controlled to be turned off, so that the battery cells corresponding to the remaining battery modules can be connected in series through the first switches K1 to form a whole for external power supply, so as to ensure that the basic functions of the battery assembly 20 are not affected; accordingly, when the removed battery modules are reinstalled into the preset positions corresponding to the battery assembly 20, the first switches K1 corresponding to the removed battery modules are controlled to be turned off, and the first switches K1 corresponding to the remaining battery modules are controlled to be turned off, so that the removed battery modules and the remaining battery modules are connected in series to form a whole for external power supply.

[0162] The embodiment of the present invention provides a power supply device 30, such as Figure 6 As shown, the power supply device 30 includes a first battery assembly 31 and a second battery assembly 32;

[0163] The first battery assembly 31 includes the battery assembly 20 in the above embodiment;

[0164] The second battery assembly 32 is connected to the first battery assembly 31 and is used to replenish energy to the disassembled battery module when the disassembled battery module of the first battery assembly 31 is assembled back to a preset position.

[0165] As an example, the power supply device 30 includes a first battery assembly 31 and a second battery assembly 32. The first battery assembly 31 may be the battery assembly 20 in the above embodiment, and the second battery assembly 32 may be the battery assembly 20 in the above embodiment, or may be other battery assemblies 20. When part of the battery modules 1 in the first battery assembly 31 are removed (i.e., the removed battery modules) and used as mobile power sources, the first switch K1 corresponding to the removed battery modules can be controlled to be turned on, and the first switches K1 corresponding to the remaining battery modules can be turned off, so that the battery cells corresponding to the remaining battery modules can be connected in series through the first switch K1 as a whole to supply power to the outside; when the removed battery modules are reinstalled into the preset positions corresponding to the first battery assembly 31, the first switch K1 corresponding to the removed battery modules can be controlled to be turned off, and the first switches K1 corresponding to the remaining battery modules can be turned on, so that the second battery assembly 32 can charge the removed battery modules and complete the energy replenishment control of the removed battery modules; finally, the first switch K1 corresponding to the removed battery modules and the first switches K1 corresponding to the remaining battery modules are controlled to be turned off, so that the removed battery modules and the remaining battery modules are connected in series as a whole to supply power to the outside.

[0166] For example, when the power supply device is installed on a vehicle, any one of the first battery assembly 31 and the second battery assembly 32 can be the power battery assembly 20 on the vehicle, and the other can be the starting battery assembly 20 on the vehicle. For example, when the power battery assembly 20 is the first battery assembly 31 and the starting battery assembly 20 is the second battery assembly 32, the starting battery assembly 20 can be used to recharge the disassembled battery module in the power battery assembly 20.

[0167] In one embodiment, the second battery assembly 32 includes the battery assembly 20 in the above embodiment.

[0168] As an example, the power supply device 30 includes a first battery assembly 31 and a second battery assembly 32, and the first battery assembly 31 and the second battery assembly 32 both include the battery assembly 20 in the above embodiment, that is, when the battery modules 1 in the two battery assemblies 20 can be removed and used as mobile power sources, the first switch K1 corresponding to the removed battery module can be controlled to be turned on, and the first switch K1 corresponding to the remaining battery modules can be turned off, so that the battery cells corresponding to the remaining battery modules can be connected in series through the first switch K1 to form a whole external power supply. When the removed battery module of any battery assembly 20 is reinstalled into the preset position corresponding to the first battery assembly 31, the first switch K1 corresponding to the removed battery module can be controlled to be turned off, and the first switch K1 corresponding to the remaining battery module can be turned on, so that the other battery assembly 20 can replenish the removed battery module of the battery assembly 20.

[0169] In one embodiment, if Figure 7 As shown, the power supply device 30 further includes a second voltage conversion circuit 33;

[0170] The second voltage conversion circuit 33 is connected to the first battery assembly 31 and the second battery assembly 32, and is used to convert the voltage output from the second battery assembly 32 to the disassembled battery module.

[0171] As an example, the power supply device 30 further includes a second voltage conversion circuit 33, which is arranged between the first battery assembly 31 and the second battery assembly 32, and is used to convert the voltage of the disassembled battery module outputted from the second battery assembly 32 to the first battery assembly 31. In this example, when the disassembled battery module in the first battery assembly 31 is reinstalled into the preset position of the first battery assembly 31, the first switch K1 corresponding to the disassembled battery module can be controlled to be disconnected, and the first switch K1 corresponding to the remaining battery module can be turned on, so that the second battery assembly 32 can replenish the disassembled battery module. During the replenishment process, if the voltage of the first battery assembly 31 does not match the voltage of the second battery assembly 32, it will affect the normal progress of the replenishment process, and even damage the first battery assembly 31. Therefore, it is necessary to set a second voltage conversion circuit 33 between the first battery assembly 31 and the second battery assembly 32 for step-up and step-down conversion. For example, when the voltage of the second battery assembly 32 is higher than the voltage of the first battery assembly 31 that needs to be recharged, the output voltage of the second battery assembly 32 is stepped down by the second voltage conversion circuit 33, and the stepped-down voltage is used to recharge the removed battery module of the first battery assembly 31; when the voltage of the second battery assembly 32 is lower than the voltage of the first battery assembly 31 that needs to be recharged, the output voltage of the second battery assembly 32 is stepped up by the second voltage conversion circuit 33, and the stepped-up voltage is used to recharge the removed battery module of the first battery assembly 31.

[0172] In one embodiment, if Figure 8 As shown, either one of the first battery assembly 31 and the second battery assembly 32 is a high-voltage battery assembly, and the other is a low-voltage battery assembly;

[0173] The second voltage conversion circuit 33 includes a second transformer T2, a first rectifier circuit 331 and a second rectifier circuit 332;

[0174] The first winding of the second transformer T2 is connected to the high-voltage battery assembly through the first rectifier circuit 331;

[0175] The second winding of the second transformer T2 is connected to the low-voltage battery assembly through the second rectifier circuit 332 .

[0176] Among them, the high-voltage battery assembly refers to the battery assembly 20 with higher voltage at both ends, and the low-voltage battery assembly refers to the battery assembly 20 with lower voltage at both ends, that is, in the two battery assemblies 20 of the power supply device 30, the battery assembly 20 with higher voltage at both ends is the high-voltage battery assembly, and the battery assembly 20 with lower voltage at both ends is the low-voltage battery assembly. The first winding and the second winding of the second transformer T2 are two windings in the second transformer T2.

[0177] As an example, the second voltage conversion circuit 33 includes a second transformer T2, a first rectifier circuit 331, and a second rectifier circuit 332. The first winding of the second transformer T2 is connected to both ends of the high-voltage battery assembly through the first rectifier circuit 331, and the second winding of the second transformer T2 is connected to both ends of the low-voltage battery assembly through the second rectifier circuit 332. In this example, both ends of the first winding of the second transformer T2 are respectively connected to the first connection terminal V1 and the second connection terminal V2 of the second transformer T2, and both ends of the second winding of the second transformer T2 are respectively connected to the third connection terminal V3 and the fourth connection terminal V4 of the second transformer T2.

[0178] For example, the low-voltage battery assembly is the first battery assembly 31, and the high-voltage battery assembly is the second battery assembly 32. When the disassembled battery modules of the low-voltage battery assembly are assembled back to the preset position, the high-voltage battery assembly can be controlled to replenish energy for the disassembled battery modules of the low-voltage battery assembly. The control process is as follows: the voltage output by the high-voltage battery assembly is rectified by the first rectifier circuit 331, then stepped down by the second transformer T2, and finally rectified by the second rectifier circuit 332, so that the voltage input to the low-voltage battery assembly is lower than the output voltage of the high-voltage battery assembly.

[0179] For example, the high-voltage battery assembly is the first battery assembly 31, and the low-voltage battery assembly is the second battery assembly 32. When the disassembled battery modules of the high-voltage battery assembly are assembled back to the preset position, the low-voltage battery assembly can be controlled to replenish energy for the disassembled battery modules of the high-voltage battery assembly. The control process is as follows: the voltage output by the low-voltage battery assembly is rectified by the second rectifier circuit 332, and then boosted by the second transformer T2. Then, it is rectified by the first rectifier circuit 331, so that the voltage input to the high-voltage battery assembly is higher than the output voltage of the low-voltage battery assembly.

[0180] In one embodiment, if Figure 8 As shown, the first rectifier circuit 331 is a full-bridge rectifier circuit, and the full-bridge rectifier circuit 331 includes a first bridge arm and a second bridge arm;

[0181] The first end of the first bridge arm and the first end of the second bridge arm are both connected to the first end of the high-voltage battery assembly;

[0182] The second end of the first bridge arm and the second end of the second bridge arm are both connected to the second end of the high-voltage battery assembly;

[0183] A midpoint of the first bridge arm and a midpoint of the second bridge arm are respectively connected to two ends of the first winding of the second transformer.

[0184] As an example, the first rectifier circuit 331 can be a full-bridge rectifier circuit, which includes a first bridge arm and a second bridge arm; the first bridge arm includes a first transistor G31 and a second transistor G32 arranged in series, and the connection node between the first transistor G31 and the second transistor G32 is the midpoint of the first bridge arm; the second bridge arm includes a third transistor G33 and a fourth transistor G34 arranged in series, and the connection node between the third transistor G33 and the fourth transistor G34 is the midpoint of the second bridge arm; both ends of the first bridge arm and both ends of the second bridge arm are used to connect to the high-voltage battery assembly, that is, the first end of the first bridge arm and the first end of the second bridge arm are both connected to the first end of the high-voltage battery assembly, that is, the first transistor G31 and the third transistor G33 are both connected to the first end of the high-voltage battery assembly; the second end of the first bridge arm and the second The second ends of the bridge arms are connected to the second ends of the high-voltage battery assembly, that is, the second transistor G32 and the fourth transistor G34 are connected to the second end of the high-voltage battery assembly; the midpoint of the first bridge arm and the midpoint of the second bridge arm are respectively connected to the two ends of the first winding of the second transformer T2, and the following two steps can be performed alternately: (1) controlling the first transistor G31 and the fourth transistor G34 to be turned on, and controlling the second transistor G32 and the third transistor G33 to be turned off, so that the high-voltage battery assembly is connected to the first winding of the second transformer T2 through the first transistor G31 and the fourth transistor G34; (2) controlling the second transistor G32 and the third transistor G33 to be turned on, and controlling the first transistor G31 and the fourth transistor G34 to be turned off, so that the high-voltage battery assembly is connected to the first winding of the high-voltage battery assembly through the second transistor G32 and the fourth transistor G34 to achieve a rectification effect.

[0185] In one embodiment, the first rectifier circuit 331 is a half-bridge rectifier circuit, and the half-bridge rectifier circuit includes a third bridge arm;

[0186] The first end of the third bridge arm and the midpoint of the third bridge arm are respectively connected to two ends of the high-voltage battery assembly;

[0187] The second end of the third bridge arm and the midpoint of the third bridge arm are respectively connected to the two ends of the first winding of the second transformer.

[0188] As an example, the first rectifier circuit 331 may be a half-bridge rectifier circuit, which includes a third bridge arm, wherein the first end of the third bridge arm and the midpoint of the third bridge arm are respectively connected to the two ends of the high-voltage battery assembly, that is, the two ends of a transistor in the third bridge arm are respectively connected to the two ends of the high-voltage battery assembly; the second end of the third bridge arm and the midpoint of the third bridge arm are respectively connected to the two ends of the first winding of the second transformer, that is, the two ends of another transistor in the third bridge arm are respectively connected to the two ends of the first winding of the second transformer. For example, the third bridge arm includes two transistors, wherein the two ends of one transistor are connected to the two ends of the high-voltage battery assembly; the two ends of the other transistor are connected to the two ends of the first winding of the second transformer T2, and the signal between the high-voltage battery assembly and the first winding of the second transformer T2 is rectified by controlling the conduction and disconnection of the two transistors.

[0189] In one embodiment, if Figure 8 As shown, the second rectifier circuit 332 is a synchronous rectifier circuit, and the synchronous rectifier circuit includes a fourth bridge arm;

[0190] Two ends of the fourth bridge arm are respectively connected to two ends of the second winding of the second transformer;

[0191] The midpoint of the fourth bridge arm and the middle tap of the second winding of the second transformer are respectively connected to the two ends of the low-voltage battery assembly.

[0192] As an example, the second rectifier circuit 332 is a synchronous rectifier circuit, which includes a fourth bridge arm, and the fourth bridge arm includes a fifth transistor G35 and a sixth transistor G36 arranged in series; the two ends of the fourth bridge arm are respectively connected to the two ends of the second winding of the second transformer, the fifth transistor G35 is connected to the first end of the second winding of the second transformer T2, and the sixth transistor G36 is connected to the second end of the second winding of the second transformer T2; the midpoint of the fourth bridge arm and the middle tap of the second winding of the second transformer are respectively connected to the two ends of the low-voltage battery assembly, that is, the midpoint of the fourth bridge arm and the middle tap of the second winding of the second transformer are respectively the third connection terminal V3 and the fourth connection terminal V4 of the second voltage conversion circuit 33, which are used to connect the two ends of the low-voltage battery assembly. In this example, by staggered control of either one of the fifth transistor G35 and the sixth transistor G36 to be turned on and the other to be turned off, the two ends of the second voltage conversion circuit 33 are staggeredly connected to the low-voltage battery assembly, and the signal between the low-voltage battery assembly and the second winding of the second transformer T2 is rectified.

[0193] In one embodiment, if Figure 8As shown, the second voltage conversion circuit 33 further includes a third filter capacitor C31 , and two ends of the third filter capacitor C31 are respectively connected to two ends of the second rectifier circuit 332 .

[0194] As an example, the second voltage conversion circuit 33 also includes a third filter capacitor C31, and the two ends of the third filter capacitor C31 are respectively connected to the two ends of the second rectifier circuit 332, that is, the third filter capacitor C31 is arranged between the third connection terminal V3 and the fourth connection terminal V4 of the second voltage conversion circuit 33, and can filter the input voltage or output voltage of the second voltage conversion circuit 33.

[0195] The embodiment of the present invention provides a battery control method, which is applied to the battery assembly 20 in the above embodiment. The battery control method can be applied to a BMS or other electronic devices. Taking a BMS as an example, the BMS is connected to the battery assembly 20 and is used to control the operation of the battery assembly 20. The battery control method includes:

[0196] Based on the first measured data corresponding to the plurality of battery modules 1, determining the disassembled battery modules and the remaining battery modules in the plurality of battery modules 1;

[0197] The remaining battery modules are controlled to supply power to the battery assembly 20 .

[0198] The first measured data is data detected in real time and is used to evaluate the current state of the battery assembly 20 . The first measured data may include but is not limited to measured voltage, etc.

[0199] As an example, the BMS detects the first measured data corresponding to the multiple battery modules 1 in the battery assembly 20 in real time; by comparing and analyzing the first measured data corresponding to the multiple battery modules 1, it determines which battery modules among the multiple battery modules are disassembled battery modules and which battery modules are remaining battery modules. Then, the remaining battery modules are controlled to power the battery assembly 20, so that after the disassembled battery module is disassembled, the remaining battery modules can still supply power to the outside normally, so as to ensure that the disassembled battery module of the battery assembly 20 can work normally before and after it is disassembled.

[0200] In one embodiment, the plurality of battery modules 1 of the battery assembly 20 are connected in series, and the battery assembly 20 further comprises a plurality of first switches, and both ends of each battery module 1 detachable from the battery assembly are connected in parallel with one of the first switches; the battery control method further comprises:

[0201] The first switch corresponding to the removed battery module and the first switch corresponding to the remaining battery module are controlled to operate.

[0202] As an example, after determining the disassembled battery modules and the remaining battery modules among the multiple battery modules 1, the BMS can control the first switch K1 corresponding to the disassembled battery module and the first switch K1 corresponding to the remaining battery module to work, so that the battery assembly 20 can normally supply power to the outside to ensure the realization of its basic functions. Since the battery modules 1 in the battery assembly 20 are detachably connected, each battery module 1 can be disassembled and used as a mobile power source to ensure the convenience of charging the load outside the vehicle; moreover, the two ends of each battery module 1 are connected in parallel with a first switch K1. After determining the current state and the corresponding disassembled battery modules and the remaining battery modules according to the first measured data corresponding to the multiple battery modules 1, the first switch K1 corresponding to the disassembled battery module and the first switch K1 corresponding to the remaining battery module are controlled to work to ensure that the basic functions of the battery assembly 20 are not affected before and after the battery module 1 is disassembled.

[0203] In one embodiment, before determining the removed battery modules and remaining battery modules of the battery assembly, the method further includes:

[0204] The current state of the battery assembly is determined based on the first measured data corresponding to the plurality of battery modules, where the current state is a disassembled state or a replaced state.

[0205] Among them, the current state of the battery assembly 20 includes two states: a disassembled state and a returned state. The disassembled state refers to a state in which part of the battery module 1 is disassembled, and conversely, the returned state refers to a state in which the disassembled battery module 1 is returned to a preset position.

[0206] As an example, the BMS detects the first measured data corresponding to multiple battery modules 1 in the battery assembly 20 in real time; by comparing and analyzing the first measured data corresponding to multiple battery modules 1, it determines whether the current state of the battery assembly 20 is disassembled or put back, and determines the disassembled battery module and the remaining battery module corresponding to the current state. Then, according to the control strategy corresponding to the current state, the first switch K1 corresponding to the disassembled battery module and the first switch K1 corresponding to the remaining battery module are controlled to work, so that the battery assembly 20 can normally supply power to the outside to ensure the realization of its basic functions.

[0207] In this example, when it is necessary to remove some battery modules 1 from the battery assembly 20 as a mobile power source to supply power to the external load of the vehicle, these battery modules 1 can be removed from the battery assembly 20 and determined as the removed battery modules, and the other battery modules are determined as the remaining battery modules; when it is determined according to the first measured data that the current state of the battery assembly 20 is the removed state, the first switch K1 corresponding to the removed battery module is controlled to be turned on, and the first switch K1 corresponding to the remaining battery module is controlled to be turned off, so that the battery cells corresponding to the remaining battery modules can be connected in series through the first switch K1 to form a whole Power is supplied to the outside to ensure that the basic functions of the battery assembly 20 are not affected; accordingly, when it is determined according to the first measured data that the current state of the battery assembly 20 is the put-back state, that is, when the disassembled battery module is reinstalled into the preset position corresponding to the battery assembly 20, the first switch K1 corresponding to the disassembled battery module is controlled to be disconnected, and the first switch K1 corresponding to the remaining battery module is controlled to be disconnected, so that the disassembled battery module and the remaining battery module are connected in series to form a whole to supply power to the outside, so that the battery assembly 20 can supply power to the outside normally before and after the battery module 1 is disassembled to ensure the realization of its basic functions.

[0208] In one embodiment, the first measured data includes a measured voltage;

[0209] The determining the current state of the battery assembly based on the first measured data corresponding to the plurality of battery modules includes:

[0210] When an open circuit voltage exists in the measured voltages corresponding to the plurality of battery modules, determining that the battery assembly is in the disassembled state;

[0211] When there is no open circuit voltage among the measured voltages corresponding to the plurality of battery modules and the preset placement conditions are met, it is determined that the battery assembly is in the placed-back state.

[0212] The open circuit voltage is a voltage used to evaluate whether the battery module 1 is in an open circuit state.

[0213] As an example, the BMS detects the measured voltages corresponding to multiple battery modules 1 in the battery assembly 20 in real time; compares the measured voltage corresponding to each battery module 1 with the open circuit voltage; if there is an open circuit voltage in the measured voltages corresponding to the multiple battery modules 1, it is determined that at least one battery module 1 is disassembled, and the current state of the battery assembly 20 can be determined to be a disassembled state; conversely, if there is no open circuit voltage in the measured voltages corresponding to the multiple battery modules 1, the voltage change corresponding to each battery module 1 is determined according to the measured voltages corresponding to the multiple battery modules 1, and based on the voltage changes corresponding to all the battery modules 1, it is evaluated whether the preset pick-up and placement conditions are met, and if the preset pick-up and placement conditions are met, the current state of the battery assembly 20 is determined to be a placed back state.

[0214] In one embodiment, the preset pick-and-place condition is that a measured voltage change corresponding to the measured voltage is greater than a preset voltage change.

[0215] The preset voltage variation is a preset threshold value used to evaluate whether the voltage variation reaches a larger standard and to determine whether the battery module 1 is disassembled or put back.

[0216] As an example, the BMS detects the measured voltages of multiple battery modules 1 in real time, and determines the corresponding measured voltage change based on the measured voltages detected at two adjacent moments of the same battery module 1; compares the measured voltage change with the preset voltage change; if the measured voltage change is greater than the preset voltage change, it means that a battery module 1 has been disassembled or put back, and therefore, it is determined that the preset pick-up and placement conditions are met.

[0217] In one embodiment, controlling the first switch corresponding to the removed battery module and the first switch corresponding to the remaining battery module to operate includes:

[0218] When the current state is a disassembled state, controlling the first switch corresponding to the disassembled battery module to be turned on, and controlling the first switches corresponding to the remaining battery modules to be turned off;

[0219] When the current state is the put-back state, the first switch corresponding to the removed battery module is controlled to be disconnected, and the first switches corresponding to the remaining battery modules are controlled to be disconnected.

[0220] As an example, when the BMS determines that the current state of the battery assembly 20 is a disassembled state, it can be determined that some battery modules 1 in the battery assembly 20 have been disassembled as a mobile power source. To ensure the basic functions of the battery assembly 20, it is necessary to control the first switch K1 corresponding to the disassembled battery module to be turned on, and control the first switch K1 corresponding to the remaining battery modules to be turned off, so that the battery cells corresponding to the remaining battery modules can be connected in series through the first switch K1 to supply power to the outside as a whole, so as to ensure that the basic functions of the battery assembly 20 are not affected.

[0221] As an example, when the BMS determines that the current state of the battery assembly 20 is the replaced state, it can determine that the disassembled battery module in the battery assembly 20 is reinstalled into the preset position corresponding to the battery assembly 20. At this time, it is necessary to control the first switch K1 corresponding to the disassembled battery module to be disconnected, and control the first switch K1 corresponding to the remaining battery module to be disconnected, so that the disassembled battery module and the remaining battery module are connected in series to form a whole to supply power to the outside.

[0222] In one embodiment, before controlling the first switch corresponding to the removed battery module to be disconnected and controlling the first switches corresponding to the remaining battery modules to be disconnected, the battery control method further includes:

[0223] The disassembled battery modules are recharged until the second measured data corresponding to the plurality of battery modules 1 meet the recharge completion condition.

[0224] The second measured data is data detected in real time and is used to evaluate whether the disassembled battery module has been fully replenished. The second measured data may include but is not limited to measured SOC, etc.

[0225] As an example, when the BMS determines that the current state of the battery assembly 20 is the replaced state, it can determine that the disassembled battery module in the battery assembly 20 is reinstalled into the preset position corresponding to the battery assembly 20. Since the disassembled battery module is taken away separately for use as a mobile power source, the power difference between the disassembled battery module and the remaining battery modules will be large. If the two are directly connected in series as a whole to supply power to the outside, it will affect the normal operation of the battery assembly 20. Therefore, it is necessary to perform a charging operation to recharge the disassembled battery module using the power of the battery assembly 20 itself or the power of an external power supply, and in the charging process, the second measured data corresponding to multiple battery modules 1 is detected in real time, and the second measured data is compared with the preset charging completion condition. If the second measured data meets the charging completion condition, it is determined that the charging of the disassembled battery module is completed, and the control of the first switch K1 corresponding to the remaining battery module can be executed to disconnect, so that the disassembled battery module and the remaining battery module are connected in series as a whole to supply power to the outside.

[0226] In one embodiment, the step of replenishing energy for the disassembled battery module includes:

[0227] The remaining battery modules are controlled to replenish energy for the removed battery modules.

[0228] As an example, when the BMS determines that the current state of the battery assembly 20 is the replaced state, it can determine that the disassembled battery module in the battery assembly 20 is reinstalled into the preset position corresponding to the battery assembly 20. Since the disassembled battery module is taken away separately for use as a mobile power source, the power difference between the disassembled battery module and the remaining battery modules will be large. If the two are directly connected in series as a whole to supply power to the outside, it will affect the normal operation of the battery assembly 20. At this time, since the power of the remaining battery module is generally greater than the power of the disassembled battery module, the remaining battery module can be controlled to replenish the disassembled battery module, and during the replenishment process, the second measured data corresponding to multiple battery modules 1 can be detected in real time, and the second measured data can be compared with the preset replenishment completion condition. If the second measured data meets the replenishment completion condition, it is determined that the recharge of the disassembled battery module is completed, and the control of the first switch K1 corresponding to the remaining battery module can be disconnected, so that the disassembled battery module and the remaining battery module are connected in series as a whole to supply power to the outside. In this example, the remaining battery modules are controlled to recharge the removed battery modules to fully utilize the power of the battery assembly 20 without introducing an external power source for recharging, which helps to ensure the convenience of the recharging operation.

[0229] In one embodiment, the battery assembly 20 further includes a first switch circuit 3, a second switch circuit 4 and a first voltage conversion circuit 5; two input ends of the first voltage conversion circuit 5 are connected to two ends of any battery module 1 of the plurality of battery modules 1 through the first switch circuit 3; two output ends of the first voltage conversion circuit 5 are connected to two ends of each battery module 1 detachable from the battery assembly through the second switch circuit 4;

[0230] The controlling the remaining battery modules to replenish the removed battery modules includes:

[0231] Control the first switches K1 corresponding to the multiple battery modules 1 to be disconnected, control the first switch circuits 3 corresponding to the remaining battery modules to be turned on, control the second switch circuits 4 corresponding to the disassembled battery modules to be turned on, and control the first voltage conversion circuit 5 to work, so that the remaining battery modules can replenish energy for the disassembled battery modules.

[0232] As an example, when the disassembled battery module is reinstalled into the preset position corresponding to the battery assembly 20, the BMS needs to recharge the disassembled battery module, and the specific control process is as follows: control the first switch K1 corresponding to all the battery modules 1 to be disconnected, so that all the battery cells in the battery assembly 20 are connected in series to form a loop, and then control the first switch circuit 3 between the two input ends of the first voltage conversion circuit 5 and the remaining battery modules to be turned on, and control the second switch circuit 4 between the two output ends of the first voltage conversion circuit 5 and the disassembled battery module to be turned on, so that the first voltage conversion circuit 5 converts the voltage output by the remaining battery module, and then recharges the disassembled battery module.

[0233] In this example, the battery modules 1 in the battery assembly 20 are detachably connected, so that each battery module 1 can be removed and used as a mobile power source to meet the needs of charging external loads. Each battery module 1 is arranged in parallel with a first switch K1 to ensure that the basic functions of the battery assembly 20 are not affected before and after each battery module 1 is removed; by controlling the operation of the first switch circuit 3, the second switch circuit 4 and the first voltage conversion circuit 5, the remaining battery modules in the battery assembly 20 can be used to replenish energy for the removed battery modules to ensure the balance of each battery unit in the battery assembly 20 and to ensure the normal operation of the power supply device 30.

[0234] In one embodiment, the second measured data includes measured electrical quantity;

[0235] The energy replenishment completion condition is that the absolute value of the measured power difference is less than the preset power difference threshold;

[0236] The absolute value of the measured power difference is the difference between the measured power of the remaining battery module and the measured power of the removed battery module.

[0237] The preset power difference threshold is a pre-set threshold for evaluating whether the power difference reaches a smaller standard, and can be specifically understood as a threshold for evaluating whether the remaining battery module and the removed battery module are in balanced power.

[0238] As an example, when the BMS controls the remaining battery modules to recharge the removed battery modules, it is necessary to obtain the measured power corresponding to multiple battery modules 1, based on the measured power of the remaining battery modules and the measured power of the removed battery modules, and dynamically calculate the absolute value of the measured power difference between the two, and then compare the absolute value of the measured power difference with the preset power difference threshold. If the absolute value of the measured power difference is less than the preset power difference threshold, it is determined that the absolute value of the measured power difference between the remaining battery modules and the removed battery modules is small, and it can be determined that the recharging of the removed battery modules is completed, and the first switch K1 corresponding to the remaining battery modules can be controlled to disconnect, so that the removed battery modules and the remaining battery modules are connected in series as a whole to supply power to the outside.

[0239] An embodiment of the present invention provides a power supply control method, which is applied to the power supply device 30 in the above embodiment. The power supply control method is applicable to a BMS or other electronic devices. Taking a BMS as an example, the BMS is connected to the power supply device 30. The power supply control method includes:

[0240] Determining that the current state of the first battery assembly 31 is a put-back state;

[0241] The second battery assembly 32 is controlled to replenish energy for the first battery assembly 31 .

[0242] Among them, the current state of the first battery assembly 31 includes two states: a disassembled state and a returned state. The disassembled state refers to a state in which part of the battery module 1 is disassembled, and conversely, the returned state refers to a state in which the disassembled battery module 1 is returned to a preset position.

[0243] As an example, the BMS detects in real time the first measured data corresponding to multiple battery modules 1 in the first battery assembly 31; by comparing and analyzing the first measured data corresponding to multiple battery modules 1, it determines whether the current state of the first battery assembly 31 is a disassembled state or a replaced state, and determines the disassembled battery modules and remaining battery modules corresponding to the current state.

[0244] As an example, when the BMS determines that the current state of the first battery assembly 31 is the returned state, it can determine that the disassembled battery module in the first battery assembly 31 is reinstalled into the preset position corresponding to the first battery assembly 31. Since the disassembled battery module is taken away separately for use as a mobile power source, the power difference between the disassembled battery module and the remaining battery modules will be large. If the two are directly connected in series as a whole to supply power to the outside, it will affect the normal operation of the first battery assembly 31. Therefore, it is necessary to perform a charging operation, specifically control the second battery assembly 32 to charge the disassembled battery module in the first battery assembly 31, and detect the second measured data corresponding to multiple battery modules 1 in real time during the charging process, and compare the second measured data with the preset charging completion condition. If the second measured data meets the charging completion condition, it is determined that the charging of the disassembled battery module in the first battery assembly 31 is completed, so that the first battery assembly 31 can operate normally.

[0245] In one embodiment, before determining that the current state of the first battery assembly is a put-back state, the method further includes:

[0246] A current state of the first battery assembly is determined based on first measured data of the first battery assembly, where the current state is a disassembled state or a replaced state.

[0247] As an example, the BMS detects the first measured data corresponding to the multiple battery modules 1 in the first battery assembly 31 in real time, and determines whether the current state of the battery assembly 20 is a disassembled state or a put-back state by comparing and analyzing the first measured data corresponding to the multiple battery modules 1. In this example, the BMS can determine the current state of the first battery assembly 31 based on the measured voltages corresponding to the multiple battery modules 1 and the pre-set evaluation criteria, and the current state is a disassembled state or a put-back state.

[0248] In one embodiment, the first measured data includes a measured voltage;

[0249] The determining the current state of the battery assembly based on the first measured data corresponding to the plurality of battery modules includes:

[0250] When an open circuit voltage exists in the measured voltages corresponding to the plurality of battery modules, determining that the battery assembly is in the disassembled state;

[0251] When there is no open circuit voltage among the measured voltages corresponding to the plurality of battery modules and the preset placement conditions are met, it is determined that the battery assembly is in the placed-back state.

[0252] The open circuit voltage is a voltage used to evaluate whether the battery module 1 is in an open circuit state.

[0253] As an example, the BMS detects the measured voltages corresponding to multiple battery modules 1 in the first battery assembly 31 in real time; compares the measured voltage corresponding to each battery module 1 with the open circuit voltage; if there is an open circuit voltage in the measured voltages corresponding to the multiple battery modules 1, it is determined that at least one battery module 1 is disassembled, and the current state of the first battery assembly 31 can be determined to be a disassembled state; conversely, if there is no open circuit voltage in the measured voltages corresponding to the multiple battery modules 1, the voltage change corresponding to each battery module 1 is determined according to the measured voltages corresponding to the multiple battery modules 1, and based on the voltage changes corresponding to all the battery modules 1, it is evaluated whether they meet the preset pick-and-place conditions, and if the preset pick-and-place conditions are met, the current state of the first battery assembly 31 is determined to be a placed back state.

[0254] In one embodiment, the preset pick-and-place condition is that a measured voltage change corresponding to the measured voltage is greater than a preset voltage change.

[0255] The preset voltage variation is a preset threshold value used to evaluate whether the voltage variation reaches a larger standard and to determine whether the battery module 1 is disassembled or put back.

[0256] As an example, the BMS detects the measured voltages of multiple battery modules 1 in real time, and determines the corresponding measured voltage change based on the measured voltages detected at two adjacent moments of the same battery module 1; compares the measured voltage change with the preset voltage change; if the measured voltage change is greater than the preset voltage change, it means that a battery module 1 has been disassembled or put back, and therefore, it is determined that the preset pick-up and placement conditions are met.

[0257] In one embodiment, controlling the second battery assembly 32 to replenish the first battery assembly 31 includes:

[0258] The second battery assembly 32 is controlled to recharge the disassembled battery module of the first battery assembly 31 until the second measured data of the first battery assembly 31 meets the recharging completion condition.

[0259] As an example, when the BMS determines that the current state of the first battery assembly 31 is the returned state, it can determine that the disassembled battery module in the first battery assembly 31 is reinstalled into the preset position corresponding to the first battery assembly 31. Since the disassembled battery module is taken away separately for use as a mobile power source, the power difference between the disassembled battery module and the remaining battery modules will be large. If the two are directly connected in series as a whole to supply power to the outside, it will affect the normal operation of the first battery assembly 31. Therefore, it is necessary to perform a charging operation, specifically control the second battery assembly 32 to charge the disassembled battery module in the first battery assembly 31, and detect the second measured data corresponding to multiple battery modules 1 in real time during the charging process, and compare the second measured data with the preset charging completion condition. If the second measured data meets the charging completion condition, it is determined that the charging of the disassembled battery module in the first battery assembly 31 is completed, so that the first battery assembly 31 can operate normally.

[0260] In one embodiment, the energy replenishment completion condition is that the measured power of the removed battery module of the first battery assembly 31 reaches the target power;

[0261] The target power is determined based on an average of the measured power of the remaining battery modules of the first battery assembly 31 .

[0262] The target power is the power used to evaluate whether the disassembled battery module has been fully replenished.

[0263] As an example, before the BMS needs to control the second battery assembly 32 to recharge the removed battery modules in the first battery assembly 31, it needs to first obtain the measured power of the remaining battery modules in the first battery assembly 31, and determine the target power based on the average of the measured power of the remaining battery modules. Specifically, the average of the measured power of the remaining battery modules can be directly determined as the target power, or the average of the measured power of the remaining battery modules can be adjusted to determine the target power. For example, the difference between the average of the measured power of the remaining battery modules and a preset error value is determined as the target power. When the BMS controls the second battery assembly 32 to recharge the disassembled battery module in the first battery assembly 31, it detects the measured power corresponding to the disassembled battery module in real time, and compares the measured power corresponding to the disassembled battery module with the target power. If the measured power corresponding to the disassembled battery module is greater than the target power, it is determined that the absolute value of the measured power difference between the remaining battery module and the disassembled battery module is small, and it can be determined that the recharging of the disassembled battery module is completed. The first switch K1 corresponding to the remaining battery module can be controlled to be disconnected, so that the disassembled battery module and the remaining battery module are connected in series as a whole to supply power to the outside.

[0264] In one embodiment, the plurality of battery modules 1 of the first battery assembly 31 are connected in series, and the first battery assembly 31 further comprises a plurality of first switches, and each of the two ends of the battery module 1 detachable from the battery assembly is connected in parallel with one of the first switches;

[0265] Before controlling the second battery assembly 32 to replenish the first battery assembly 31, the power supply control method further includes:

[0266] The first switches corresponding to the removed battery modules of the first battery assembly 31 are controlled to be disconnected, and the first switches corresponding to the remaining battery modules of the first battery assembly 31 are controlled to be turned on.

[0267] As an example, when the BMS determines that the current state is the put-back state, it first controls the first switch K1 corresponding to the removed battery module of the first battery assembly 31 to be disconnected, controls the first switch K1 corresponding to the remaining battery modules of the first battery assembly 31 to be turned on, and then controls the second battery assembly 32 to replenish the removed battery module of the first battery assembly 31, so that the second battery module 32 can charge the removed battery module of the first battery assembly 31 without charging the remaining battery modules of the first battery assembly 31, so as to realize targeted energy replenishment for the removed battery modules.

[0268] In one embodiment, controlling the second battery assembly 32 to replenish the first battery assembly 31 further includes:

[0269] The second voltage conversion circuit arranged between the first battery assembly 31 and the second battery assembly 32 is controlled to work, the output voltage of the second battery assembly 32 is converted, and the converted voltage is used to replenish energy for the disassembled battery module in the first battery assembly 31.

[0270] As an example, when the disassembled battery module in the first battery assembly 31 is reinstalled into the preset position of the first battery assembly 31, the first switch K1 corresponding to the disassembled battery module can be controlled to be disconnected, and the first switch K1 corresponding to the remaining battery module can be turned on, so that the second battery assembly 32 can replenish the disassembled battery module. During the replenishment process, if the voltage of the first battery assembly 31 does not match the voltage of the second battery assembly 32, it will affect the normal progress of the replenishment process and even damage the first battery assembly 31 and the second battery assembly 32. Therefore, it is necessary to control the second voltage conversion circuit 33 arranged between the first battery assembly 31 and the second battery assembly 32 to work, convert the output voltage of the second battery assembly 32, and use the converted voltage to replenish the disassembled battery module in the first battery assembly 31. For example, when the voltage of the second battery assembly 32 is higher than the voltage of the first battery assembly 31 that needs to be recharged, the output voltage of the second battery assembly 32 is stepped down by the second voltage conversion circuit 33, and the stepped-down voltage is used to recharge the removed battery module of the first battery assembly 31; when the voltage of the second battery assembly 32 is lower than the voltage of the first battery assembly 31 that needs to be recharged, the output voltage of the second battery assembly 32 is stepped up by the second voltage conversion circuit 33, and the stepped-up voltage is used to recharge the removed battery module of the first battery assembly 31.

[0271] An embodiment of the present invention provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the above-mentioned battery control method is implemented. To avoid repetition, it is not described one by one here.

[0272] An embodiment of the present invention provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, the above-mentioned battery control method is implemented. To avoid repetition, it is not described here one by one.

[0273] An embodiment of the present invention provides a vehicle, including the battery assembly 20 in the above embodiment, the power supply device in the above embodiment, the electronic device in the above embodiment or the computer-readable storage medium in the above embodiment, which will not be described one by one here to avoid repetition.

[0274] An embodiment of the present invention provides a vehicle, comprising the battery assembly in the above embodiment, the power supply device in the above embodiment, the electronic device in the above embodiment, or the computer-readable storage medium in the above embodiment.

[0275] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A vehicle-mounted power supply, characterized in that: include: A battery module, wherein the battery module is suitable for constituting a battery assembly of a vehicle and is detachable from the battery assembly; the battery assembly comprises a plurality of the battery modules, an assembly structure, and a plurality of first switches; the plurality of the battery modules are connected in series; at least one of the battery modules is detachable from the battery assembly via the assembly structure; Two ends of each battery module detachable from the battery assembly are connected in parallel with one of the first switches; An electric energy output circuit, wherein the input end of the electric energy output circuit is connected to the battery module, the output end of the electric energy output circuit is suitable for connecting to an external load, and the electric energy output circuit is used to convert the output voltage of the battery module to supply power to the external load when the battery module is in a disassembled state.

2. The vehicle-mounted power supply according to claim 1, characterized in that: The electric energy output circuit comprises: a first switch tube, a second switch tube, a first inductor and an energy storage capacitor; The first switch tube and the second switch tube are arranged in series between the first input terminal and the first output terminal of the electric energy output circuit; The first end of the first inductor is connected to the connection node between the first switch tube and the second switch tube, and the second end of the first inductor is connected to the second input end and the second output end of the power output circuit; Two ends of the energy storage capacitor are respectively connected to the first output end and the second output end of the electric energy output circuit.

3. The vehicle-mounted power supply according to claim 2, characterized in that: The electric energy output circuit also includes: A first filter capacitor, wherein two ends of the first filter capacitor are respectively connected to a first input end and a second input end of the electric energy output circuit.

4. The vehicle-mounted power supply according to claim 2 or 3, characterized in that: The battery module comprises a plurality of battery cells, and the plurality of battery cells are connected in series in sequence; The first input terminal and the second input terminal of the electric energy output circuit are connected to two ends of the battery module respectively.

5. The vehicle-mounted power supply according to claim 1, characterized in that: The battery assembly also includes: A first switch circuit, a second switch circuit and a first voltage conversion circuit; The two input ends of the first voltage conversion circuit are connected to the two ends of any one of the plurality of battery modules through a first switch circuit; The two output ends of the first voltage conversion circuit are connected to the two ends of each battery module detachable from the battery assembly through a second switch circuit.

6. The vehicle-mounted power supply according to claim 5, characterized in that: The first voltage conversion circuit includes a first transformer, a third switch tube, a fourth switch tube and a fifth switch tube; The first end of the first winding of the first transformer is connected to the first switch circuit through the third switch tube; The first end of the second winding of the first transformer is connected to the second switch circuit through the fourth switch tube; The second end of the second winding of the first transformer is connected to the second switch circuit through the fifth switch tube.

7. The vehicle-mounted power supply according to claim 6, characterized in that: The first voltage conversion circuit also includes a second filter capacitor, and two ends of the second filter capacitor are connected to two output ends of the first voltage conversion circuit.

8. A power supply device, characterized in that: including a first battery assembly and a second battery assembly; The first battery assembly includes the battery assembly in the vehicle-mounted power supply according to any one of claims 1 to 7; The second battery assembly is connected to the first battery assembly and is used to replenish energy to the disassembled battery module when the disassembled battery module of the first battery assembly is assembled back to a preset position.

9. The power supply device according to claim 8, characterized in that: The second battery assembly includes the battery assembly in the vehicle power supply according to any one of claims 1-7.

10. The power supply device according to claim 8, characterized in that: The power supply device further includes a second voltage conversion circuit; The second voltage conversion circuit is connected to the first battery assembly and the second battery assembly, and is used to convert the voltage output by the second battery assembly to the disassembled battery module.

11. The power supply device according to claim 10, characterized in that: Either one of the first battery assembly and the second battery assembly is a high-voltage battery assembly, and the other is a low-voltage battery assembly; The second voltage conversion circuit includes a second transformer, a first rectifier circuit and a second rectifier circuit; The first winding of the second transformer is connected to the high-voltage battery assembly through the first rectifier circuit; The second winding of the second transformer is connected to the low-voltage battery assembly through the second rectifier circuit.

12. The power supply device according to claim 11, characterized in that: The first rectifier circuit is a full-bridge rectifier circuit, and the full-bridge rectifier circuit includes a first bridge arm and a second bridge arm; The first end of the first bridge arm and the first end of the second bridge arm are both connected to the first end of the high-voltage battery assembly; The second end of the first bridge arm and the second end of the second bridge arm are both connected to the second end of the high-voltage battery assembly; A midpoint of the first bridge arm and a midpoint of the second bridge arm are respectively connected to two ends of the first winding of the second transformer.

13. The power supply device according to claim 11, characterized in that: The first rectifier circuit is a half-bridge rectifier circuit, and the half-bridge rectifier circuit includes a third bridge arm; The first end of the third bridge arm and the midpoint of the third bridge arm are respectively connected to two ends of the high-voltage battery assembly; The second end of the third bridge arm and the midpoint of the third bridge arm are respectively connected to the two ends of the first winding of the second transformer.

14. The power supply device according to claim 11, characterized in that: The second rectifier circuit is a synchronous rectifier circuit, and the synchronous rectifier circuit includes a fourth bridge arm; Two ends of the fourth bridge arm are respectively connected to two ends of the second winding of the second transformer; The midpoint of the fourth bridge arm and the middle tap of the second winding of the second transformer are respectively connected to the two ends of the low-voltage battery assembly.

15. The power supply device according to claim 11, characterized in that: The second voltage conversion circuit also includes a third filter capacitor, and two ends of the third filter capacitor are respectively connected to two ends of the second rectifier circuit.

16. A battery control method, characterized in that: Applied to the vehicle-mounted power supply according to any one of claims 1 to 7, the battery control method comprises: Determine, based on first measured data corresponding to the plurality of battery modules, the disassembled battery modules and the remaining battery modules among the plurality of battery modules; The remaining battery modules are controlled to supply power to the battery assembly.

17. The battery control method according to claim 16, characterized in that: The multiple battery modules of the battery assembly are connected in series, and the battery assembly further comprises a plurality of first switches, and two ends of each battery module detachable from the battery assembly are connected in parallel with one of the first switches; The battery control method further includes: The first switch corresponding to the removed battery module and the first switch corresponding to the remaining battery module are controlled to operate.

18. The battery control method according to claim 16, characterized in that: Before determining the disassembled battery modules and the remaining battery modules among the plurality of battery modules based on the first measured data corresponding to the plurality of battery modules, the method further includes: Based on the first measured data corresponding to the plurality of battery modules, current states of the plurality of battery modules are determined, where the current states are disassembled states or replaced states.

19. The battery control method according to claim 18, characterized in that: The first measured data includes a measured voltage; The determining the current state of the battery assembly based on the first measured data corresponding to the plurality of battery modules includes: When an open circuit voltage exists in the measured voltages corresponding to the plurality of battery modules, determining that the battery assembly is in the disassembled state; When there is no open circuit voltage among the measured voltages corresponding to the plurality of battery modules and the preset placement conditions are met, it is determined that the battery assembly is in the placed-back state.

20. The battery control method according to claim 19, characterized in that: The preset pick-and-place condition is that a measured voltage change corresponding to the measured voltage is greater than a preset voltage change.

21. The battery control method according to claim 18, characterized in that: The controlling the first switch corresponding to the removed battery module and the first switch corresponding to the remaining battery module to operate includes: When the current state is a disassembled state, controlling the first switch corresponding to the disassembled battery module to be turned on, and controlling the first switches corresponding to the remaining battery modules to be turned off; When the current state is the put-back state, the first switch corresponding to the removed battery module is controlled to be disconnected, and the first switches corresponding to the remaining battery modules are controlled to be disconnected.

22. The battery control method according to claim 17, characterized in that: Before controlling the first switch corresponding to the removed battery module to be disconnected and controlling the first switches corresponding to the remaining battery modules to be disconnected, the battery control method further includes: The disassembled battery modules are recharged until the second measured data corresponding to the multiple battery modules meet the recharge completion condition.

23. The battery control method according to claim 22, characterized in that: The step of replenishing energy for the disassembled battery module comprises: The remaining battery modules are controlled to replenish energy for the removed battery modules.

24. The battery control method according to claim 23, characterized in that: The battery assembly further includes a first switch circuit, a second switch circuit and a first voltage conversion circuit; two input ends of the first voltage conversion circuit are connected to two ends of any battery module among the plurality of battery modules through the first switch circuit; two output ends of the first voltage conversion circuit are connected to two ends of each battery module detachable from the battery assembly through the second switch circuit; The controlling the remaining battery modules to replenish the removed battery modules includes: Control the first switches corresponding to the multiple battery modules to be disconnected, control the first switch circuits corresponding to the remaining battery modules to be turned on, control the second switch circuits corresponding to the removed battery modules to be turned on, and control the first voltage conversion circuit to work, so that the remaining battery modules can replenish energy for the removed battery modules.

25. The battery control method according to claim 22, characterized in that: The second measured data includes measured power; The energy replenishment completion condition is that the absolute value of the measured power difference is less than the preset power difference threshold; The absolute value of the measured power difference is the difference between the measured power of the remaining battery module and the measured power of the removed battery module.

26. A power supply control method, characterized in that: Applied to the power supply device according to any one of claims 8 to 15, the power supply control method comprises: Determining that the current state of the first battery assembly is a returned state; Control the second battery assembly to replenish energy for the first battery assembly.

27. The power supply control method according to claim 26, characterized in that: Before determining that the current state of the first battery assembly is a put-back state, the method further includes: A current state of the first battery assembly is determined based on first measured data of the first battery assembly, where the current state is a disassembled state or a replaced state.

28. The power supply control method according to claim 26, characterized in that: The controlling the second battery assembly to replenish energy for the first battery assembly includes: The second battery assembly is controlled to recharge the removed battery module of the first battery assembly until the second measured data of the first battery assembly meets the recharging completion condition.

29. The power supply control method according to claim 28, characterized in that: The energy replenishment completion condition is that the measured power of the removed battery module of the first battery assembly reaches the target power; The target power is determined based on an average of the measured power of the remaining battery modules of the first battery assembly.

30. The power supply control method according to claim 26, characterized in that: The plurality of battery modules of the first battery assembly are connected in series, and the first battery assembly further comprises a plurality of first switches, and two ends of each battery module detachable from the battery assembly are connected in parallel with one of the first switches; Before controlling the second battery assembly to replenish the first battery assembly, the power supply control method further includes: The first switch corresponding to the removed battery module of the first battery assembly is controlled to be disconnected, and the first switch corresponding to the remaining battery modules of the first battery assembly is controlled to be turned on.

31. The power supply control method according to claim 26, characterized in that: The controlling the second battery assembly to replenish energy for the first battery assembly further includes: The second voltage conversion circuit disposed between the first battery assembly and the second battery assembly is controlled to operate, the output voltage of the second battery assembly is converted, and the converted voltage is used to replenish energy for the disassembled battery module in the first battery assembly.

32. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, it implements the battery control method described in any one of claims 16-25, or implements the power supply control method described in any one of claims 26-31.

33. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, it implements the battery control method described in any one of claims 16-25, or implements the power supply control method described in any one of claims 26-31.

34. A vehicle, characterized in that: It includes the vehicle-mounted power supply according to any one of claims 1 to 7, the power supply device according to any one of claims 8 to 15, the electronic device according to claim 32, or the computer-readable storage medium according to claim 33.

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