Power supply method, power supply system and automobile

Abstract

The invention discloses a power supply method, a power supply system and an automobile, and the power supply method comprises the steps that when the automobile runs, a battery pack is adopted to supply power to a plurality of power utilization devices; when the automobile is parked and charged, the charging gun is used for supplying power to the plurality of electric devices and the battery pack at the same time; the power supply system comprises a battery pack, a charging socket, a first power supply positive wire, a first power supply negative wire, a second power supply positive wire, a second power supply negative wire, a first relay and a second relay, and the first power supply positive wire and the first power supply negative wire are connected between the power utilization device and the battery pack; the second power supply positive wire and the second power supply negative wire are connected between the power utilization device and the battery pack; the first relay is connected in series with the first power supply positive wire, the second relay is connected in series with the second power supply positive wire, and the first relay and the second relay are electrically connected with the management system of the battery pack, so that the safety of the battery pack is improved, the charging and discharging times of the battery pack are reduced, and the service life of the battery pack is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of automobiles, and in particular, to a power supply method, a power supply system and an automobile. Background Art

[0002] Electric or hybrid electric vehicle electrical devices such as air conditioners, radios, and lighting systems are all electrically connected to the battery pack and powered by the battery pack. When users use electrical devices such as air conditioners, radios, and lighting systems while charging their electric or hybrid vehicles, the battery pack will be charged and discharged at the same time, which will reduce the charging efficiency of the battery pack and increase the charging time of the battery pack; on the other hand, it will increase the number of charge and discharge times of the battery pack and reduce the service life of the battery pack. Summary of the invention

[0003] In order to solve at least one aspect of the above problems, the present invention provides a power supply method, including using a battery pack to supply power to a plurality of electrical devices when the car is driving; and using a charging gun to supply power to a plurality of electrical devices and the battery pack at the same time when the car is parked and charging. Through the above technical scheme, the mode of the battery pack supplying power to a plurality of electrical devices in the prior art is retained for use in the process of the car driving, and a mode of using a charging pile to supply power to the electrical devices and the battery pack at the same time when the car is parked and charging is creatively added. At this time, there is no need for the battery pack to supply power to the electrical devices, and the charging pile is used to directly supply power to the electrical devices, which helps to improve the safety of the battery pack and reduce the number of times the battery pack is charged and discharged, thereby extending the service life of the battery pack.

[0004] Preferably, one or more charging guns are provided; when one charging gun is provided, one charging gun is used to power several power-consuming devices and battery packs at the same time; when multiple charging guns are provided, multiple charging guns are used to power several power-consuming devices and battery packs respectively at the same time. According to the arrangement of existing charging piles, two charging piles are designed to power power consumption devices and battery packs at the same time. Among them, the method of using two charging guns to power several power consumption devices and battery packs respectively at the same time not only ensures the use of power consumption devices, but also helps to improve the charging efficiency of battery packs.

[0005] Preferably, when one charging gun is used to supply power to several electrical devices and a battery pack at the same time, the power supply system of the automobile includes a battery pack, a charging socket, at least one group of power supply lines and at least one group of relays; the battery pack includes a battery pack body, a management system, a positive main line, a negative main line, a positive branch line and a negative branch line; the positive main line and the negative main line are electrically connected to the positive terminal and the negative terminal of the battery pack body, respectively; the first end of the positive branch line and the first end of the negative branch line are electrically connected to the positive main line and the negative main line, respectively, and the second end of the positive branch line and the second end of the negative branch line are electrically connected to the positive terminal and the negative terminal of the charging socket, respectively, and the charging socket is used to be electrically connected to the charging gun; a group of power supply lines includes a first positive power supply line, a first negative power supply line, a second positive power supply line, a second negative power supply line ; The first end of the first positive power supply line and the first end of the first negative power supply line are respectively used to electrically connect to the positive terminal and negative terminal of the electrical device, and the second end of the first positive power supply line and the second end of the first negative power supply line are respectively electrically connected to the positive main line and the negative main line; the first end of the second positive power supply line and the first end of the second negative power supply line are respectively used to electrically connect to the positive terminal and negative terminal of the electrical device, and the second end of the second positive power supply line and the second end of the second negative power supply line are respectively electrically connected to the positive branch line and the negative branch line; a group of relays includes a first relay and a second relay, the first relay is connected in series to the first positive power supply line, and the second relay is connected in series to the second positive power supply line; the management system includes a control unit, and the control unit is electrically connected to the first relay and the second relay, respectively.

[0006] Preferably, when two charging guns are used to supply power to several electrical devices and a battery pack respectively at the same time, the power supply system of the automobile includes a battery pack, two charging sockets, at least one group of power supply lines and at least one group of relays; the battery pack includes a battery pack body, a management system, a positive main line, a negative main line, a positive branch line and a negative branch line; the positive main line and the negative main line are electrically connected to the positive terminal and the negative terminal of the battery pack body respectively; the first end of the positive branch line and the first end of the negative branch line are electrically connected to the positive main line and the negative main line respectively, and the second end of the positive branch line and the second end of the negative branch line are electrically connected to the positive terminal and the negative terminal of one of the charging sockets respectively, and the charging socket is used to be electrically connected to the charging gun; a group of power supply lines includes a first positive power supply line, a first negative power supply line, a second positive power supply line and a second negative power supply line; The first end of the first positive power supply line and the first end of the first negative power supply line are respectively used to electrically connect to the positive terminal and the negative terminal of the electrical device, and the second end of the first positive power supply line and the second end of the first negative power supply line are respectively electrically connected to the positive main line and the negative main line; the first end of the second positive power supply line and the first end of the second negative power supply line are respectively used to electrically connect to the positive terminal and the negative terminal of the electrical device, and the second end of the second positive power supply line and the second end of the second negative power supply line are respectively electrically connected to the positive terminal and the negative terminal of another charging socket; a group of relays includes a first relay and a second relay, the first relay is connected in series to the first positive power supply line, and the second relay is connected in series to the second positive power supply line; the management system includes a control unit, and the control unit is electrically connected to the first relay and the second relay, respectively.

[0007] The present application also provides a power supply system, including a battery pack, a charging socket, at least one group of power supply lines and at least one group of relays; the battery pack includes a battery pack body, a management system, a positive main line, a negative main line, a positive branch line and a negative branch line; the positive main line and the negative main line are electrically connected to the positive terminal and the negative terminal of the battery pack body respectively; the first end of the positive branch line and the first end of the negative branch line are electrically connected to the positive main line and the negative main line respectively, the second end of the positive branch line and the second end of the negative branch line are electrically connected to the positive terminal and the negative terminal of the charging socket respectively, and the charging socket is used to be electrically connected to a charging pile; a group of power supply lines includes a first positive power supply line, a first negative power supply line, a second positive power supply line and a second negative power supply line; the first end of the first positive power supply line and The first end of the first negative power supply line is used to electrically connect to the positive terminal and the negative terminal of the electrical device, and the second end of the first positive power supply line and the second end of the first negative power supply line are electrically connected to the positive main line and the negative main line respectively; the first end of the second positive power supply line and the first end of the second negative power supply line are used to electrically connect to the positive terminal and the negative terminal of the electrical device, and the second end of the second positive power supply line and the second end of the second negative power supply line are electrically connected to the positive branch line and the negative branch line respectively; a group of relays includes a first relay and a second relay, the first relay is connected in series on the first positive power supply line, and the second relay is connected in series on the second positive power supply line; the management system includes a control unit, and the control unit is electrically connected to the first relay and the second relay, respectively.

[0008] Through the above technical scheme, a power supply system for a car that is suitable for charging with a charging gun is designed. When the management system obtains a signal expressing the driving of the car, the first relay is controlled to close and the second relay is disconnected, so that the battery pack can supply power to the electrical device; when the charging pile is connected to the charging socket of the car and the management system obtains a signal expressing the parking charging of the car, the second relay is controlled to close and the first relay is disconnected, so that the charging pile can supply power to the electrical device and the battery pack at the same time, which helps to improve the safety of the battery pack and reduce the number of charge and discharge times of the battery pack, thereby extending the service life of the battery pack.

[0009] Preferably, a step-down transformer or a DC / DC converter is connected in series to the first positive power supply line.

[0010] Preferably, the power supply lines and relays are provided in multiple groups, and the number of power supply lines and relays is equal to the number of electrical devices to be connected, so as to be connected to multiple electrical devices respectively, so as to realize individual control of power supply to the electrical devices.

[0011] Preferably, the electrical device is an air conditioner, and / or a lighting system, and / or a radio.

[0012] Preferably, the electrical device is an ultrasonic generator; the battery pack body also includes a shell, a number of modules, and at least one ultrasonic transducer, the modules are fixedly connected in the shell, and a plurality of ultrasonic transducers are respectively fixedly installed in the modules, or at least one storage box is fixedly connected to the bottom plate of the shell, the storage box contains a heat transfer medium, and the ultrasonic transducer is fixedly inserted in the storage box; the ultrasonic transducer is electrically connected to the ultrasonic generator. Through the above technical scheme, the power supply system of the present application is used to power the ultrasonic generator, so that the battery pack body is powered by the ultrasonic generator during normal driving, and the charging pile is powered by the ultrasonic generator during parking charging; by setting an ultrasonic transducer, the cavitation effect of ultrasound and its accompanying thermal effect are used to heat up the electrolyte in the module or the heat transfer medium is heated and transfers heat to the module, which helps to solve the charging and discharging problems of the battery pack in cold climate environments, thereby further improving the charging efficiency of the battery pack and extending the service life of the battery pack.

[0013] Preferably, a temperature sensor is fixedly inserted on the module or storage box to detect the temperature of the electrolyte or the heat transfer medium; the management system includes a receiving unit, which is electrically connected to the temperature sensor, so that the management system controls the opening and closing of the first relay or the second relay according to the transmission signal of the temperature sensor. Through the above technical solution, a temperature sensor is set to detect the temperature of the electrolyte in the module or the heat transfer medium in the storage box and transmit the information to the receiving unit. When the management system determines that the temperature is lower than the preset value, the control unit controls the first relay or the second relay to close; when the management system determines that the temperature is higher than the preset value, the control unit controls the first relay and the second relay to close.

[0014] The present application also provides a car, comprising any power supply system described above.

[0015] A power supply method, a power supply system and a vehicle of the present invention have the following beneficial effects:

[0016] The power supply method creatively adds a mode in which a charging pile is used to simultaneously power an electrical device and a battery pack when the car is parked and charged. In this case, the battery pack is no longer required to power the electrical device, and the charging pile is used to directly power the electrical device; the power supply system creatively adds a plurality of electrical connection structures between the electrical device and the charging socket, which is used for the charging pile to directly power the electrical device, and the management system controls the first relay and the second relay according to the operating status of the vehicle to realize the switching between the battery pack powering the electrical device and the charging pile powering the electrical device and the battery pack at the same time, which helps to improve the safety of the battery pack and reduce the number of charge and discharge times of the battery pack, thereby extending the service life of the battery pack; by designing one of the electrical devices as an ultrasonic generator and providing an ultrasonic transducer in the battery pack, the cavitation effect of the ultrasonic wave and its accompanying thermal effect are used to heat the electrolyte in the module or heat the heat transfer medium and transfer heat to the module, which helps to solve the charging and discharging problems of the battery pack in cold climate environments, thereby further improving the charging efficiency of the battery pack and extending the service life of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to better understand the above and other purposes, features, advantages and functions of the present invention, reference may be made to the embodiments shown in the accompanying drawings. The same reference numerals in the accompanying drawings refer to the same components. It should be understood by those skilled in the art that the accompanying drawings are intended to schematically illustrate the preferred embodiments of the present invention and have no limiting effect on the scope of the present invention, and the components in the drawings are not drawn to scale.

[0018] Figure 1 A circuit diagram of a power supply system according to an embodiment of the present invention is shown;

[0019] Figure 2 A circuit diagram of a power supply system according to another embodiment of the present invention is shown;

[0020] Figure 3 A schematic structural diagram of a battery pack for a vehicle according to an embodiment of the present invention is shown;

[0021] Figure 4 A bottom view of a battery pack for a vehicle according to an embodiment of the present invention is shown.

[0022] Description of reference numerals:

[0023] 11. Battery pack body; 111. Shell; 112. Module; 113. Cooling pipe; 12. Management system; 13. Positive main line; 14. Negative main line; 15. Positive branch line; 16. Negative branch line; 2. Charging socket; 3. Charging pile; 41. First relay; 42. Second relay; 51. First positive power supply line; 52. First negative power supply line; 53. Second positive power supply line; 54. Second negative power supply line; 6. DC / DC converter; 71. Ultrasonic generator; 72. Ultrasonic transducer; 73. Storage box; 731. Plug cover; 74. Temperature sensor. DETAILED DESCRIPTION

[0024] The following is a description of exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, including various details of the embodiments of the present disclosure to facilitate understanding, which should be considered as merely exemplary. Therefore, it should be recognized by those of ordinary skill in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.

[0025] As used herein, the term "including" and its variations mean open inclusion, i.e., "including but not limited to". Unless otherwise stated, the term "or" means "and / or". The term "based on" means "based at least in part on". The terms "an example embodiment" and "an embodiment" mean "at least one example embodiment". The term "another embodiment" means "at least one additional embodiment". The terms "first", "second", etc. may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0026] In order to at least partially solve one or more of the above-mentioned problems and other potential problems, an embodiment of the present disclosure proposes a power supply method, including using a battery pack to power a number of electrical devices when the car is driving; and using a charging gun to simultaneously power a number of electrical devices and the battery pack when the car is parked and charging.

[0027] There is one or two charging piles 3, and one or two charging guns are provided on the charging pile 3. When there is one charging pile 3 and one charging gun is provided on the charging pile 3, one charging gun is used to supply power to several electrical devices and battery packs at the same time; specifically, Figure 1As shown, at this time, the power supply system of the car includes a battery pack, a charging socket 2, at least one group of power supply lines and at least one group of relays; the battery pack includes a battery pack body 11, a management system 12, a positive main line 13, a negative main line 14, a positive branch line 15 and a negative branch line 16; the positive main line 13 and the negative main line 14 are electrically connected to the positive terminal and the negative terminal of the battery pack body respectively; the first end of the positive branch line 15 and the first end of the negative branch line 16 are electrically connected to the positive main line 13 and the negative main line 14 respectively, the second end of the positive branch line 15 and the second end of the negative branch line 16 are electrically connected to the positive terminal and the negative terminal of the charging socket 2 respectively, and the charging socket 2 is used to be electrically connected to the charging gun; a group of power supply lines includes a first positive power supply line 51, a first negative power supply line 52, a second positive power supply line 53, and a second negative power supply line 54; the first end of the first positive power supply line 51 The first end of the first power supply negative line 52 is respectively used to electrically connect to the positive terminal and the negative terminal of the electrical device, and the second end of the first power supply positive line 51 and the second end of the first power supply negative line 52 are respectively electrically connected to the positive main line 13 and the negative main line 14; the first end of the second power supply positive line 53 and the first end of the second power supply negative line 54 are respectively used to electrically connect to the positive terminal and the negative terminal of the electrical device, and the second end of the second power supply positive line 53 and the second end of the second power supply negative line 54 are respectively electrically connected to the positive branch line 15 and the negative branch line 16; a group of relays includes a first relay 41 and a second relay 42, the first relay 41 is connected in series to the first power supply positive line 51, and the second relay 42 is connected in series to the second power supply positive line 53; the management system 12 includes a control unit, and the control unit is electrically connected to the first relay 41 and the second relay 42 respectively.

[0028] Preferably, when two charging piles 3 are arranged close to each other, or two charging guns are arranged on one charging pile 3, the two charging guns are used to supply power to several electrical devices and battery packs respectively at the same time; specifically, Figure 2As shown, at this time, the power supply system of the car includes a battery pack, two charging sockets 2, at least one group of power supply lines and at least one group of relays; the battery pack includes a battery pack body 11, a management system 12, a positive main line 13, a negative main line 14, a positive branch line 15 and a negative branch line 16; the positive main line 13 and the negative main line 14 are electrically connected to the positive terminal and the negative terminal of the battery pack body respectively; the first end of the positive branch line 15 and the first end of the negative branch line 16 are electrically connected to the positive main line 13 and the negative main line 14 respectively, and the second end of the positive branch line 15 and the second end of the negative branch line 16 are electrically connected to the positive terminal and the negative terminal of one of the charging sockets 2 respectively, and the charging socket 2 is used to be electrically connected to the charging gun; a group of power supply lines includes a first positive power supply line 51, a first negative power supply line 52, a second positive power supply line 53, and a second negative power supply line 54; the first end of the first positive power supply line 51 The first end of the first power supply negative line 52 is respectively used to electrically connect to the positive terminal and the negative terminal of the electrical device, and the second end of the first power supply positive line 51 and the second end of the first power supply negative line 52 are respectively electrically connected to the positive main line 13 and the negative main line 14; the first end of the second power supply positive line 53 and the first end of the second power supply negative line 54 are respectively used to electrically connect to the positive terminal and the negative terminal of the electrical device, and the second end of the second power supply positive line 53 and the second end of the second power supply negative line 54 are respectively electrically connected to the positive terminal and the negative terminal of another charging socket 2; a group of relays includes a first relay 41 and a second relay 42, the first relay 41 is connected in series to the first power supply positive line 51, and the second relay 42 is connected in series to the second power supply positive line 53; the management system 12 includes a control unit, which is electrically connected to the first relay 41 and the second relay 42 respectively.

[0029] The present application also provides a power supply system, such as Figure 1As shown, it includes a battery pack, a charging socket 2, at least one group of power supply lines and at least one group of relays; the battery pack includes a battery pack body 11, a management system 12, a positive main line 13, a negative main line 14, a positive branch line 15 and a negative branch line 16; the positive main line 13 and the negative main line 14 are electrically connected to the positive terminal and the negative terminal of the battery pack body respectively; the first end of the positive branch line 15 and the first end of the negative branch line 16 are electrically connected to the positive main line 13 and the negative main line 14 respectively, the second end of the positive branch line 15 and the second end of the negative branch line 16 are electrically connected to the positive terminal and the negative terminal of the charging socket 2 respectively, and the charging socket 2 is used to be electrically connected to the charging pile 3; a group of power supply lines includes a first positive power supply line 51, a first negative power supply line 52, a second positive power supply line 53, and a second negative power supply line 54; the first end of the first positive power supply line 51 and the first end of the first negative power supply line 52 are used to be electrically connected to the positive terminal and the negative terminal of the power-consuming device respectively The electrical device may be an air conditioner, and / or a lighting system, and / or a radio. The second end of the first positive power supply line 51 and the second end of the first negative power supply line 52 are electrically connected to the positive main line 13 and the negative main line 14, respectively. Preferably, a step-down transformer or a DC / DC converter 6 is connected in series to the first positive power supply line 51; the first end of the second positive power supply line 53 and the first end of the second negative power supply line 54 are used to electrically connect to the positive terminal and the negative terminal of the electrical device, respectively, and the second end of the second positive power supply line 53 and the second end of the second negative power supply line 54 are electrically connected to the positive branch line 15 and the negative branch line 16, respectively; a group of relays includes a first relay 41 and a second relay 42, the first relay 41 is connected in series to the first positive power supply line 51, and the second relay 42 is connected in series to the second positive power supply line 53; the management system 12 includes a control unit, and the control unit is electrically connected to the first relay 41 and the second relay 42, respectively.

[0030] In some embodiments, multiple groups of power supply lines and relays are provided, and the number of groups of power supply lines and relays is equal to the number of electrical devices to be connected, and are used to connect to multiple electrical devices respectively, so as to realize separate control of power supply to the electrical devices; specifically, the first end of the first positive power supply line 51, the first end of the first negative power supply line 52, the first end of the second positive power supply line 53, and the first end of the second negative power supply line 54 in the multiple groups of power supply lines are used to be electrically connected to the positive terminals and negative terminals of the multiple electrical devices respectively, and the second end of the first positive power supply line 51 and the first negative power supply line 54 in the multiple groups of power supply lines are used to be electrically connected to the positive terminals and negative terminals of the multiple electrical devices respectively. The second ends of 52 are electrically connected to the positive main line 13 and the negative main line 14 respectively, and the second ends of the second positive power supply line 53 and the second negative power supply line 54 in the multiple power supply lines are electrically connected to the positive branch line 15 and the negative branch line 16 respectively; the first relays 41 in the multiple relay groups are respectively connected in series to the first positive power supply line 51 in the multiple power supply lines, and the second relays 42 in the multiple relay groups are respectively connected in series to the second positive power supply line 53 in the multiple power supply lines, and the first relays 41 and the second relays 42 in the multiple relay groups are both electrically connected to the control unit of the management system 12.

[0031] In some embodiments, the electrical device is an ultrasonic generator 71, and the first end of the first positive power supply line 51, the first end of the first negative power supply line 52, the first end of the second positive power supply line 53, and the first end of the second negative power supply line 54 are respectively electrically connected to the positive terminal and the negative terminal of the ultrasonic generator 71; the battery pack body 11 also includes a shell 111, a plurality of modules 112, and at least one ultrasonic transducer 72, the plurality of modules 112 are fixedly connected in the shell 111, and the plurality of ultrasonic transducers 72 are respectively fixedly installed in the plurality of modules 112, or the shell 111 At least one storage box 73 is fixedly connected to the bottom plate, and a heat transfer medium is contained in the storage box 73. An ultrasonic transducer 72 is fixedly inserted on the storage box 73; the ultrasonic transducer 72 is electrically connected to the ultrasonic generator 71; preferably, a temperature sensor 74 is fixedly inserted on the module 112 or the storage box 73 for detecting the temperature of the electrolyte or the heat transfer medium; the management system 12 includes a receiving unit, and the receiving unit is electrically connected to the temperature sensor 74, so that the management system 12 controls the opening and closing of the first relay 41 or the second relay 42 according to the transmission signal of the temperature sensor 74.

[0032] More preferably, a storage box 73 is provided on the bottom plate of the housing 111, and the ultrasonic transducer 72 and the temperature sensor 74 are both connected to the storage box 73. Specifically, Figure 1 , Figure 3 and Figure 4As shown, a plurality of storage boxes 73 are provided, and the plurality of storage boxes 73 are evenly distributed at the bottom end of the bottom plate. Preferably, in this embodiment, the number of storage boxes 73 is equal to the number of modules 112, and a plurality of storage boxes 73 correspond to a plurality of modules 112 one by one. The plurality of storage boxes 73 are respectively arranged directly below the plurality of modules 112, and the outer wall of the storage box 73 is fixedly connected to the bottom surface of the bottom plate of the shell 111; a filling port is provided on each storage box 73, and a plugging cover 731 is installed on the filling port; a cooling pipe 113 distributed in a wave shape is fixedly connected to the bottom surface of the bottom plate, and the plurality of storage boxes 73 are respectively arranged in the wave trough of the cooling pipe 113; The storage box 73 contains a heat transfer medium, preferably, the heat transfer medium is silicone oil; a plurality of ultrasonic transducers 72 are provided, the number of ultrasonic transducers 72 is equal to the number of storage boxes 73, the plurality of ultrasonic transducers 72 are respectively connected to the plurality of storage boxes 73, the plurality of ultrasonic transducers 72 are all electrically connected to the ultrasonic generator 71, and the ultrasonic generator 71 is fixedly connected to the bottom surface of the bottom plate; a plurality of temperature sensors 74 are provided, the number of temperature sensors 74 is equal to the number of storage boxes 73, the plurality of temperature sensors 74 are respectively connected to the plurality of storage boxes 73, and the plurality of temperature sensors 74 are all electrically connected to the receiving unit.

[0033] The present application also provides a car, comprising any power supply system described above.

[0034] The embodiments of the present disclosure have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The selection of terms used herein is intended to best explain the principles of the embodiments, practical applications, or technical improvements in the market, or to enable other persons of ordinary skill in the art to understand the present invention.

Claims

1. A power supply method, characterized in that: include When the car is running, the battery pack is used to power several electrical devices; When the car is parked and charging, a charging gun is used to power several electrical devices and the battery pack at the same time.

2. A power supply method according to claim 1, characterized in that: There are one or more charging guns. When there is one charging gun, one charging gun is used to supply power to several electrical devices and battery packs at the same time. When there are multiple charging guns, multiple charging guns are used to supply power to several electrical devices and battery packs respectively at the same time.

3. A power supply method according to claim 2, characterized in that: When a charging gun is used to simultaneously power a plurality of electrical devices and a battery pack, the power supply system of the vehicle comprises a battery pack, a charging socket (2), at least one set of power supply lines and at least one set of relays; The battery pack comprises a battery pack body (11), a management system (12), a positive main line (13), a negative main line (14), a positive branch line (15) and a negative branch line (16); the positive main line (13) and the negative main line (14) are respectively electrically connected to the positive terminal and the negative terminal of the battery pack body; the first end of the positive branch line (15) and the first end of the negative branch line (16) are respectively electrically connected to the positive main line (13) and the negative main line (14); the second end of the positive branch line (15) and the second end of the negative branch line (16) are respectively electrically connected to the positive terminal and the negative terminal of the charging socket (2); the charging socket (2) is used to be electrically connected to a charging gun; A group of power supply lines comprises a first positive power supply line (51), a first negative power supply line (52), a second positive power supply line (53), and a second negative power supply line (54); the first end of the first positive power supply line (51) and the first end of the first negative power supply line (52) are respectively used to electrically connect to the positive terminal and the negative terminal of the power-consuming device, and the second end of the first positive power supply line (51) and the second end of the first negative power supply line (52) are respectively electrically connected to the positive main line (13) and the negative main line (14); the first end of the second positive power supply line (53) and the first end of the second negative power supply line (54) are respectively used to electrically connect to the positive terminal and the negative terminal of the power-consuming device, and the second end of the second positive power supply line (53) and the second end of the second negative power supply line (54) are respectively electrically connected to the positive branch line (15) and the negative branch line (16); A group of relays comprises a first relay (41) and a second relay (42), wherein the first relay (41) is connected in series to a first positive power supply line (51), and the second relay (42) is connected in series to a second positive power supply line (53); and a management system (12) comprises a control unit, which is electrically connected to the first relay (41) and the second relay (42), respectively.

4. A power supply method according to claim 2, characterized in that: When two charging guns are used to respectively supply power to a plurality of electrical devices and a battery pack at the same time, the power supply system of the vehicle comprises a battery pack, two charging sockets (2), at least one set of power supply lines and at least one set of relays; The battery pack comprises a battery pack body (11), a management system (12), a positive main line (13), a negative main line (14), a positive branch line (15) and a negative branch line (16); the positive main line (13) and the negative main line (14) are respectively electrically connected to the positive terminal and the negative terminal of the battery pack body; the first end of the positive branch line (15) and the first end of the negative branch line (16) are respectively electrically connected to the positive main line (13) and the negative main line (14); the second end of the positive branch line (15) and the second end of the negative branch line (16) are respectively electrically connected to the positive terminal and the negative terminal of one of the charging sockets (2); the charging socket (2) is used to be electrically connected to a charging gun; A group of power supply lines comprises a first positive power supply line (51), a first negative power supply line (52), a second positive power supply line (53), and a second negative power supply line (54); the first end of the first positive power supply line (51) and the first end of the first negative power supply line (52) are respectively used to electrically connect to the positive terminal and the negative terminal of the power-consuming device, and the second end of the first positive power supply line (51) and the second end of the first negative power supply line (52) are respectively electrically connected to the positive main line (13) and the negative main line (14); the first end of the second positive power supply line (53) and the first end of the second negative power supply line (54) are respectively used to electrically connect to the positive terminal and the negative terminal of the power-consuming device, and the second end of the second positive power supply line (53) and the second end of the second negative power supply line (54) are respectively electrically connected to the positive terminal and the negative terminal of another charging socket (2); A group of relays comprises a first relay (41) and a second relay (42), wherein the first relay (41) is connected in series to a first positive power supply line (51), and the second relay (42) is connected in series to a second positive power supply line (53); and a management system (12) comprises a control unit, which is electrically connected to the first relay (41) and the second relay (42), respectively.

5. A power supply system, characterized in that: It comprises a battery pack, a charging socket (2), at least one set of power supply wires and at least one set of relays; The battery pack comprises a battery pack body (11), a management system (12), a positive main line (13), a negative main line (14), a positive branch line (15) and a negative branch line (16); the positive main line (13) and the negative main line (14) are respectively electrically connected to the positive terminal and the negative terminal of the battery pack body; the first end of the positive branch line (15) and the first end of the negative branch line (16) are respectively electrically connected to the positive main line (13) and the negative main line (14); the second end of the positive branch line (15) and the second end of the negative branch line (16) are respectively electrically connected to the positive terminal and the negative terminal of the charging socket (2); the charging socket (2) is used to be electrically connected to the charging pile (3); A group of power supply lines comprises a first positive power supply line (51), a first negative power supply line (52), a second positive power supply line (53), and a second negative power supply line (54); the first end of the first positive power supply line (51) and the first end of the first negative power supply line (52) are respectively used to electrically connect to the positive terminal and the negative terminal of the power-consuming device, and the second end of the first positive power supply line (51) and the second end of the first negative power supply line (52) are respectively electrically connected to the positive main line (13) and the negative main line (14); the first end of the second positive power supply line (53) and the first end of the second negative power supply line (54) are respectively used to electrically connect to the positive terminal and the negative terminal of the power-consuming device, and the second end of the second positive power supply line (53) and the second end of the second negative power supply line (54) are respectively electrically connected to the positive branch line (15) and the negative branch line (16); A group of relays comprises a first relay (41) and a second relay (42), wherein the first relay (41) is connected in series to a first positive power supply line (51), and the second relay (42) is connected in series to a second positive power supply line (53); and a management system (12) comprises a control unit, which is electrically connected to the first relay (41) and the second relay (42), respectively.

6. A power supply system according to claim 5, characterized in that: A step-down transformer or a DC / DC converter (6) is connected in series to the first positive power supply line (51).

7. A power supply system according to claim 5, characterized in that: The power supply lines and relays are provided in multiple groups, the number of which is equal to the number of electrical devices to be connected, and are used to connect to multiple electrical devices respectively, so as to realize individual control of power supply to the electrical devices.

8. A power supply system according to claim 5, characterized in that: The electrical device is an air conditioner, and / or a lighting system, and / or a radio.

9. A power supply system according to claim 5, characterized in that: The electrical device is an ultrasonic generator (71); the battery pack body (11) further comprises a shell (111), a plurality of modules (112), and at least one ultrasonic transducer (72); the plurality of modules (112) are fixedly connected in the shell (111); the plurality of ultrasonic transducers (72) are respectively fixedly installed in the plurality of modules (112); or at least one storage box (73) is fixedly connected to the bottom plate of the shell (111); a heat transfer medium is contained in the storage box (73); and the ultrasonic transducer (72) is fixedly inserted in the storage box (73); the ultrasonic transducer (72) is electrically connected to the ultrasonic generator (71).

10. A power supply system according to claim 9, characterized in that: The module (112) or the storage box (73) is fixedly provided with a temperature sensor (74) for detecting the temperature of the electrolyte or the heat transfer medium; the management system (12) comprises a receiving unit, the receiving unit being electrically connected to the temperature sensor (74), so that the management system (12) controls the opening and closing of the first relay (41) or the second relay (42) according to the transmission signal of the temperature sensor (74).

11. A car, characterized in that: A power supply system comprising any one of claims 5 to 10.

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