Vehicle power supply system and vehicle

Abstract

A vehicle power supply system and a vehicle. The vehicle power supply system (100) comprises: at least one battery swapping box (10) independent of each other, each battery swapping box (10) comprising a battery pack (11), a secondary high-voltage box (12), and a secondary quick-change connector (13); and a main high-voltage box (20); the main high-voltage box (20) is connected to a plurality of main quick-change connectors (30); the main high-voltage box (20) comprises a main positive direct-current bus, a main negative direct-current bus, and a pre-charging unit (40); one end of the main positive direct-current bus is separately connected to positive high-voltage interfaces (31) of the plurality of main quick-change connectors, and the other end of the main positive direct-current bus is separately connected to at least one main positive power supply interface (211) of the main high-voltage box; and one end of the main negative direct-current bus is separately connected to negative high-voltage interfaces (32) of the plurality of main quick-change connectors, and the other end of the main negative direct-current bus is separately connected to at least one main negative power supply interface (212) of the main high-voltage box by means of the pre-charging unit (40). According to the vehicle power supply system (100), the amount of electricity can be selected and matched according to requirements, so that the usage flexibility and the application reliability of the battery swapping box (10) are improved; moreover, a pre-charging operation can be realized on the basis of the pre-charging unit (40), so that the power safety is improved.

Description

Vehicle power supply system and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 202323594367.4, filed on December 26, 2023, entitled “Vehicle Power Supply System and Vehicle,” the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0003] The present disclosure relates to the field of vehicle technology, and in particular to a vehicle power supply system and a vehicle. Background Art

[0004] In the related art, the vehicle power supply system includes several battery swap boxes and on-board high-voltage boxes. Each battery swap box is connected to the on-board high-voltage box to complete the charging and discharging control of the battery swap box through the on-board high-voltage box.

[0005] However, the battery swap boxes in the above power supply system are fixedly connected, so during the battery swap process, all the battery swap boxes in the system need to be replaced simultaneously and as a whole. At the same time, the battery swap power options are limited, which reduces the user experience.

[0006] Public content

[0007] In view of the above problems, the present disclosure provides a vehicle power supply system and a vehicle. The battery swap boxes are designed independently of each other. Users can select the power according to their needs, thereby improving the space flexibility and application reliability of the battery swap boxes. At the same time, during the battery swap process, users can also swap batteries on one or more of the battery swap boxes, thereby improving the flexibility of battery swapping. In addition, pre-charging operations can be implemented based on the pre-charging unit, thereby improving charging safety.

[0008] In the first aspect, the present disclosure provides a vehicle power supply system, which includes: at least one independent battery exchange box, each battery exchange box includes a battery pack, a slave high-voltage box and a slave quick-change connector, and the slave high-voltage box is respectively connected to the corresponding battery pack and the slave quick-change connector; a main high-voltage box, the main high-voltage box is connected to multiple main quick-change connectors, each main quick-change connector is suitable for connecting to a slave quick-change connector, the main high-voltage box includes a main positive DC bus, a main negative DC bus and a pre-charging unit, one end of the main positive DC bus is respectively connected to the high-voltage positive interface of the multiple main quick-change connectors, the other end of the main positive DC bus is respectively connected to at least one main power supply positive interface of the main high-voltage box, one end of the main negative DC bus is respectively connected to the high-voltage negative interface of the multiple main quick-change connectors, and the other end of the main negative DC bus is respectively connected to at least one main power supply negative interface of the main high-voltage box through the pre-charging unit; wherein, when the main quick-change connector is connected to the slave quick-change connector, the electric energy of the battery pack is transmitted to at least one main power supply positive interface and at least one main power supply negative interface through the main high-voltage box and the slave high-voltage box to power the main high-voltage load of the vehicle.

[0009] In the technical solution of the embodiment of the present disclosure, each battery swap box is independent of each other, and the user can select the power according to the demand, thereby improving the flexibility of the use space and the application reliability of the battery swap box. At the same time, during the battery swap process, the user can also perform battery swap operations on one or more of the battery swap boxes to improve the flexibility of battery swap. In each battery swap box, the battery pack is connected to the slave quick-change connector through the slave high-voltage box. When the main high-voltage box is connected to the slave quick-change connector of the battery swap box through the main quick-change connector, the battery pack can be connected to the power supply interface of the main high-voltage box through the slave high-voltage box, the slave quick-change connector, and the main quick-change connector to establish a main power supply circuit to supply power to the main high-voltage load of the vehicle. At the same time, the pre-charging operation can be performed based on the pre-charging unit. That is, in the process of transmitting the electric energy of the battery pack to at least one main power supply positive interface and at least one main power supply negative interface through the main high-voltage box and the slave high-voltage box, the main power supply negative interface first limits the current on the main negative DC bus through the pre-charging unit to pre-charge the main high-voltage load of the vehicle. After the voltage of the main high-voltage load reaches the target voltage, the main power supply negative interface is controlled to be directly connected to the main negative DC bus to continue charging the main high-voltage load to ensure charging safety and avoid excessive current at the moment of high-voltage charging, which may cause damage to the equipment.

[0010] In some embodiments, the pre-charging unit includes: a main negative relay, one end of the main negative relay is connected to the other end of the main negative DC bus, and the other end of the main negative relay is respectively connected to at least one main power supply negative interface; a pre-charging relay and a pre-charging resistor, the pre-charging relay and the pre-charging resistor are connected in series and then in parallel with the main negative relay.

[0011] That is to say, during the pre-charging process, the pre-charging resistor can be used to limit the current to ensure charging safety. After the pre-charging is completed, the main negative relay is controlled to be energized to continue charging.

[0012] In some embodiments, the main high-voltage box also includes: at least one charging positive relay, one end of the at least one charging positive relay is respectively connected to the other end of the main positive DC bus, and the other end of the at least one charging positive relay is respectively connected to at least one charging positive interface of the main high-voltage box; at least one charging negative relay, one end of the at least one charging negative relay is respectively connected to the other end of the main negative DC bus, and the other end of the at least one charging negative relay is respectively connected to at least one charging negative interface of the main high-voltage box; wherein, the at least one charging positive interface and the at least one charging negative interface are suitable for being connected to the charging circuit of a charging device to charge the battery pack through the charging device.

[0013] Based on charging instructions, the main high-voltage box controls the charging positive and negative relays to close, opening the charging circuit and charging the battery pack through the charging equipment. When charging is complete or charging conditions are not met, the main high-voltage box controls the charging positive and negative relays to open, disconnecting the charging circuit and preventing charging.

[0014] In some embodiments, the main high-voltage box also includes: an auxiliary relay and a first high-voltage protection module, one end of the auxiliary relay is connected to the other end of the main positive DC bus, the other end of the auxiliary relay is connected to the auxiliary power supply positive interface of the main high-voltage box through the first high-voltage protection module, and the other end of the main negative DC bus is also connected to the auxiliary power supply negative interface of the main high-voltage box; wherein, the auxiliary power supply positive interface and the auxiliary power supply negative interface are suitable for being connected to the auxiliary power supply circuit of the vehicle to supply power to the auxiliary high-voltage load of the vehicle through the battery pack.

[0015] When the power supply system supplies power to the auxiliary high-voltage load, the first high-voltage protection module is used to perform high-voltage power supply protection on the power supply circuit to improve power safety.

[0016] In some embodiments, the main high-voltage box further includes: a second high-voltage protection module, which is connected in series to the main positive DC bus to provide high-voltage protection for the main DC bus.

[0017] In some embodiments, the master high-voltage box further includes a master battery management unit, which is connected to the pre-charge unit, at least one positive charging relay, at least one negative charging relay, and the auxiliary relay, respectively, to control the pre-charge unit, at least one positive charging relay, at least one negative charging relay, and the auxiliary relay. The master battery management unit is also connected to the low-voltage interfaces of the plurality of master quick-change connectors to exchange information with the slave high-voltage box, and to the low-voltage interface of the master high-voltage box to exchange information with the first external device. In other words, the master battery management unit can implement functions such as charge and discharge control and information exchange.

[0018] In some embodiments, the main high-voltage box further includes a main high-voltage acquisition unit configured to acquire the voltage of the main DC bus for fault diagnosis. The main battery management unit is further connected to the main high-voltage acquisition unit via a first main communication bus and configured to receive fault diagnosis results from the main high-voltage acquisition unit. The main battery management unit can control the main DC bus based on the fault diagnosis results from the main high-voltage acquisition unit and can also transmit the fault diagnosis results to external devices for high-voltage protection.

[0019] In some embodiments, the master high-voltage box also includes: a master wireless communication unit, the master battery management unit is also connected to the master wireless communication unit through a first master communication bus, so as to interact information with a second external device through the master wireless communication unit; and / or, a master remote debugging bridge, the master battery management unit is also connected to the master remote debugging bridge through a second master communication bus, so as to interact information with a remote device through the master remote debugging bridge.

[0020] The main battery management unit can realize information exchange with the second external device based on wireless communication through the main wireless communication unit; the main battery management unit can establish a network connection with the remote device based on the main remote debugging bridge, so that developers can perform debugging operations on the main battery management unit.

[0021] In some embodiments, the battery pack includes: at least one battery cell module, which is connected in series and / or in parallel and connected to the high-voltage interface of the corresponding slave high-voltage box through the high-voltage interface of the battery pack, and is configured to provide electrical energy; at least one battery monitoring unit, which is connected to the low-voltage interface of the corresponding slave high-voltage box through the low-voltage interface of the battery pack, and is configured to monitor at least one battery cell module and send the monitoring results to the corresponding slave high-voltage box.

[0022] This embodiment integrates the battery cell module and the battery monitoring unit in the battery pack, and monitors the status of the battery cell module through the battery monitoring unit to improve monitoring reliability.

[0023] In some embodiments, the slave high-voltage box includes: a slave positive DC bus and a slave positive relay, one end of the slave positive DC bus is connected to the high-voltage positive interface of the slave high-voltage box, the other end of the slave positive DC bus is connected to the high-voltage positive interface of the corresponding slave quick-change connector, and the slave positive relay is connected in series to the slave positive DC bus; a slave negative DC bus and a slave negative relay, one end of the slave negative DC bus is connected to the high-voltage negative interface of the slave high-voltage box, the other end of the slave negative DC bus is connected to the high-voltage negative interface of the corresponding slave quick-change connector, and the slave negative relay is connected in series to the slave negative DC bus.

[0024] By controlling the slave positive relay and the slave negative relay to be energized, the slave positive DC bus and the slave negative DC bus are in a conducting state to carry out the charging and discharging process; by controlling the slave positive relay and the slave negative relay to be disconnected, the slave positive DC bus and the slave negative DC bus are in a disconnected state to stop the charging and discharging process.

[0025] In some embodiments, the slave high-voltage box further includes: a third high-voltage protection module, which is connected in series to the slave positive DC bus, so as to provide high-voltage protection to the slave DC bus through the third high-voltage protection module.

[0026] In some embodiments, the slave high-voltage box further includes a slave battery management unit, which is connected to the slave positive relay and the slave negative relay, respectively, to control the slave positive relay and the slave negative relay, and is connected to the low-voltage interface of the slave high-voltage box via a first slave communication bus to exchange information with the battery pack, and is connected to the low-voltage interface of the corresponding slave quick-change connector to exchange information with the master high-voltage box. This allows the junction box and control box of related art to be integrated into the slave battery management unit, thereby improving system integration and reducing application costs.

[0027] In some embodiments, the slave high-voltage box further includes: a slave high-voltage acquisition unit configured to acquire the slave DC bus voltage for fault diagnosis; the slave battery management unit is also connected to the slave high-voltage acquisition unit via a first slave communication bus, and is configured to receive the fault diagnosis results of the slave high-voltage acquisition unit.

[0028] The slave battery management unit can control the on and off of the slave DC bus based on the fault diagnosis results of the slave high-voltage acquisition unit to perform fault protection actions. In addition, the slave battery management unit can also send the fault diagnosis results of the slave high-voltage acquisition unit to the master high-voltage box.

[0029] In some embodiments, the slave high-voltage box also includes: a slave wireless communication unit, the slave battery management unit is also connected to the slave wireless communication unit through a first slave communication bus, so as to interact with a second external device through the slave wireless communication unit; and / or, a positioning unit, the slave battery management unit is also connected to the positioning unit through a second slave communication bus, so as to obtain the location information of the slave high-voltage box through the positioning unit; and / or, a slave remote debugging bridge, the slave battery management unit is also connected to the slave remote debugging bridge through a second slave communication bus, so as to interact with a remote device through the remote debugging bridge.

[0030] The slave battery management unit can exchange information with a second external device via wireless communication via the slave wireless communication unit. The slave battery management unit can obtain real-time location information of the distribution box via the positioning unit to facilitate feedback of location information during the battery replacement process. The slave battery management unit establishes a network connection with the remote device via the slave remote debugging bridge, allowing developers to debug programs on the slave battery management unit from the remote device.

[0031] In a second aspect, the present disclosure provides a vehicle comprising the above-mentioned vehicle power supply system.

[0032] The above description is only an overview of the technical solution of the present disclosure. In order to more clearly understand the technical means of the present disclosure, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present disclosure more obvious and easy to understand, the specific implementation methods of the present disclosure are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustration purposes only and are not to be considered as limiting the present disclosure. The same reference numerals are used throughout the drawings to denote the same components. In the drawings:

[0034] FIG1 is a connection diagram of a vehicle power supply system according to some embodiments of the present disclosure;

[0035] FIG2 is a connection diagram of a vehicle power supply system according to some embodiments of the present disclosure;

[0036] FIG3 is a schematic diagram of the connection of a main high-voltage box according to some embodiments of the present disclosure;

[0037] FIG4 is a connection diagram of a main battery management unit according to some embodiments of the present disclosure;

[0038] FIG5 is a connection diagram of a battery-swapping box according to some embodiments of the present disclosure;

[0039] FIG6 is a connection diagram of a slave battery management unit according to some embodiments of the present disclosure;

[0040] FIG7 is a block diagram of a vehicle according to some embodiments of the present disclosure.

[0041] Figure markings: Vehicle power supply system 100, battery exchange box 10, battery pack 11, battery cell module 111, high voltage interface 112 of battery pack, battery monitoring unit 113, low voltage interface 114 of battery pack, slave high voltage box 12, high voltage interface 121 of slave high voltage box, low voltage interface 122 of slave high voltage box, third high voltage protection module 123, slave battery management unit 124, slave high voltage acquisition unit 125, slave wireless communication unit 126, positioning unit 127, slave remote debugging bridge 128, slave quick change connector 13, high voltage positive interface 131 of slave quick change connector, high voltage negative interface 132 of slave quick change connector, low voltage interface 133 of slave quick change connector, water cooling heat exchange component 14, water cooling interface 15 of battery exchange box, main high voltage Pressure box 20, main power supply positive interface 211, main power supply negative interface 212, auxiliary power supply positive interface 213, auxiliary power supply negative interface 214, charging positive interface 221, charging negative interface 222, first high-voltage protection module 23, second high-voltage protection module 24, main battery management unit 25, low-voltage interface 26 of main high-voltage box, main high-voltage acquisition unit 27, main wireless communication unit 28, main remote debugging bridge 29, main quick-change connector 30, high-voltage positive interface 31 of main quick-change connector, high-voltage negative interface 32 of main quick-change connector, low-voltage interface 33 of main quick-change connector, pre-charging unit 40, first external device 200, second external device 300, remote device 400, water cooling device 500, vehicle 1000. DETAILED DESCRIPTION

[0042] The following embodiments of the technical solution of the present disclosure are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present disclosure and are therefore only examples and are not intended to limit the scope of protection of the present disclosure.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present disclosure belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present disclosure; the terms "including" and "having" and any variations thereof in the specification and claims of the present disclosure and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0044] In the description of the embodiments of the present disclosure, technical terms such as "first" and "second" are used solely to distinguish between different objects and should not be understood to indicate or imply relative importance or to implicitly specify the quantity, specific order, or primary and secondary relationship of the technical features indicated. In the description of the embodiments of the present disclosure, "plurality" means more than two, unless otherwise specifically defined.

[0045] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present disclosure. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0046] In the description of the embodiments of the present disclosure, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0047] In the description of the embodiments of the present disclosure, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0048] In the description of the embodiments of the present disclosure, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present disclosure.

[0049] In the description of the embodiments of the present disclosure, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and they can refer to internal connectivity between two components or interaction between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present disclosure based on specific circumstances.

[0050] In related technologies, a vehicle power supply system includes multiple battery-switching boxes and an onboard high-voltage box. All of the battery-switching boxes are fixedly connected, and the junction box and control box in each battery-switching box are independently designed to complete the wiring and control functions within the corresponding battery-switching box through the junction box and control box, respectively. During use, each battery-switching box is connected to the onboard high-voltage box, which controls the charging and discharging of the battery-switching box.

[0051] However, the battery swap boxes in the above power supply system are fixedly connected, so during the battery swap process, the vehicle needs to keep the number of battery swap boxes consistent with the original target number, and the battery swap power options are limited, which reduces the user experience.

[0052] In order to solve the above technical problems, the present disclosure proposes a vehicle power supply system, in which the battery swap boxes are designed independently of each other. Users can select the power according to their needs, thereby improving the space flexibility and application reliability of the battery swap boxes. At the same time, during the battery swap process, pre-charging operations can be performed based on the pre-charging unit to improve charging safety.

[0053] The vehicle power supply system of the present disclosure is described below with reference to FIG1 .

[0054] As shown in FIG1 , the vehicle power supply system 100 of the present disclosure may include: at least one independent battery-swap box 10 and a main high-voltage box 20 .

[0055] Among them, each battery exchange box 10 includes a battery pack, a slave high-voltage box 12 and a slave quick-change connector 13, and the slave high-voltage box 12 is connected to the corresponding battery pack and the slave quick-change connector 13 respectively. The main high-voltage box 20 is connected to multiple main quick-change connectors 30, each main quick-change connector 30 is suitable for connecting to a slave quick-change connector 13, and the main high-voltage box 20 includes a main positive DC bus, a main negative DC bus and a pre-charging unit 40. One end of the main positive DC bus is respectively connected to the high-voltage positive interface 31 of the multiple main quick-change connectors, and the other end of the main positive DC bus is respectively connected to at least one main power supply positive interface 211 of the main high-voltage box 20. One end of the main negative DC bus is respectively connected to the high-voltage negative interface 32 of the multiple main quick-change connectors, and the other end of the main negative DC bus is respectively connected to at least one main power supply negative interface 212 of the main high-voltage box 20 through the pre-charging unit 40; wherein, when the main quick-change connector 30 is connected to the slave quick-change connector 13, the power of the battery pack is transmitted to at least one main power supply positive interface 211 and at least one main power supply negative interface 212 through the main high-voltage box 20 and the slave high-voltage box 12 to supply power to the main high-voltage load of the vehicle.

[0056] The battery pack 11 is a battery structure composed of several cells connected in parallel and / or in series for electrical energy storage. Each battery swap box 10 includes a battery pack 11, a slave high-voltage box 12 and a slave quick-change connector 13. The slave quick-change connector 13 can be a national standard DC charging socket and may include a high-voltage electrical interface, a low-voltage communication interface and an insulation detection resistor, etc. In each battery swap box 10, the battery pack 11 is connected to the slave quick-change connector 13 through the slave high-voltage box 12, that is, the slave high-voltage box 12 can realize the wiring function between the battery pack 11 and the slave quick-change connector 13, specifically, it can realize the wiring on-off control function between the battery pack 11 and the slave quick-change connector 13. In addition, the slave high-voltage box 12 can also realize the status monitoring of the battery swap box 10, such as status monitoring of the battery pack 11, current monitoring between the battery pack 11 and the slave quick-change connector 13, voltage monitoring between the battery pack 11 and the slave quick-change connector 13, temperature monitoring of multiple sampling points in the battery swap box 10, and on-off status monitoring, etc., which are not limited here.

[0057] Each battery swap box 10 in the power supply system is independent of each other, so the user can operate the battery swap box 10 individually, that is, to achieve flexible configuration of the battery swap box 10. For example, one battery swap box 10, two battery swap boxes 10, etc. can be configured. In addition, during the battery swap process, the user can perform a battery swap operation on one or more of the battery swap boxes 10, which improves the flexibility of battery swapping.

[0058] The main quick-change connector 30 is a DC charging socket compatible with the slave quick-change connector 13, and may include a high-voltage electrical interface, a low-voltage communication interface, etc. corresponding to the slave quick-change connector 13. For example, when the main quick-change connector 30 is connected to the slave quick-change connector 13, the high-voltage electrical interface of the main quick-change connector 30 is connected to the high-voltage electrical interface of the slave quick-change connector 13 to establish a power supply path; the low-voltage communication interface of the main quick-change connector 30 is connected to the low-voltage communication interface of the slave quick-change connector 13 to establish a low-voltage communication channel. As shown in Figure 2, the power supply system includes three battery-changing boxes 10. The main high-voltage box 20 is connected to the slave quick-change connector 13 of the battery-changing box 10 through the main quick-change connector 30. The high-voltage positive interface 31 of the three main quick-change connectors is connected to the high-voltage positive interface 131 of the corresponding slave quick-change connector. The high-voltage negative interface 32 of the three main quick-change connectors is connected to the high-voltage negative interface 132 of the corresponding slave quick-change connector to form a power supply circuit to transmit the electric energy of the battery-changing box 10 to the main positive DC bus and the main negative DC bus of the main high-voltage box 20.

[0059] The main high-voltage box 20 is connected to a plurality of main quick-change connectors 30, which respectively establish power supply and communication connections with the slave quick-change connector 13 of the battery-swap box 10 through the main quick-change connectors 30. The main high-voltage box 20 is connected to a plurality of main quick-change connectors 30. The user can configure the battery-swap box 10 according to actual power demand. For example, if a vehicle can be configured with one battery-swap box 10, the main high-voltage box 20 is connected to the slave quick-change connector 13 of the configured battery-swap box 10 through one of the plurality of main quick-change connectors 30; in the case of configuring two battery-swap boxes 10, the main high-voltage box 20 is connected to the slave quick-change connector 13 of the configured two battery-swap boxes 10 through two of the plurality of main quick-change connectors 30.

[0060] In the case where the vehicle is equipped with two battery swap boxes 10, the slave quick-change connectors 13 of the two battery swap boxes 10 are respectively connected to the two main quick-change connectors 30 connected to the main high-voltage box 20. At this time, the battery packs 11 in the two battery swap boxes 10 are connected to the main positive DC bus and the main negative DC bus of the high-voltage box 20 through the slave high-voltage box 12, the slave quick-change connector 13, and the corresponding main quick-change connector 30 to transmit electrical energy to the main positive DC bus and the main negative DC bus. The main positive DC bus is connected to at least one main power supply positive interface 211 of the main high-voltage box 20, and the main negative DC bus is connected to at least one main power supply negative interface 212 of the main high-voltage box 20 through the pre-charging unit 40 to transmit the electrical energy of the battery pack to at least one main power supply positive interface 211 and at least one main power supply negative interface 212 to supply power to the main high-voltage load of the vehicle.

[0061] The main high-voltage load can be set according to the operating requirements of the vehicle, for example, the main high-voltage load is the vehicle's drive motor, compressor, etc. The corresponding main power supply circuit can be matched according to the number of set main high-voltage loads, and the main power supply positive interface 211 and the main power supply negative interface 212 for supplying power to the main power supply circuit can be further configured. As shown in Figure 2, the main high-voltage box 20 is configured with two main power supply positive interfaces 211 and two main power supply negative interfaces 212. The two main power supply positive interfaces 211 and the two main power supply negative interfaces 212 are respectively connected to the power supply ends of the two main power supply circuits, that is, one main power supply positive interface 211 and one main power supply negative interface 212 are connected to the power supply end of one main power supply circuit; the other main power supply positive interface 211 and the other main power supply negative interface 212 are connected to the power supply end of the other main power supply circuit.

[0062] The pre-charging unit 4 is used to implement a pre-charging current limiting operation to prevent the current from being too large at the moment of high-voltage charging and causing damage to the equipment. Specifically, this can be achieved through components such as current limiting resistors. For example, in the process of transmitting the power of the battery pack to at least one main power supply positive interface 211 and at least one main power supply negative interface 212 through the main high-voltage box 20 and the slave high-voltage box 12, first, the main power supply negative interface 212 performs a current limiting operation on the current on the main negative DC bus through the pre-charging unit 40 to perform current limiting pre-charging on the main high-voltage load of the vehicle. After the voltage of the main high-voltage load reaches the target voltage, the main power supply negative interface 212 is controlled to be directly connected to the main negative DC bus to continue charging the main high-voltage load to ensure charging safety and avoid excessive current at the moment of high-voltage charging, which may cause damage to the equipment.

[0063] In some embodiments, the pre-charging unit 40 includes: a main negative relay K41, one end of the main negative relay K41 is connected to the other end of the main negative DC bus, and the other end of the main negative relay K41 is respectively connected to at least one main power supply negative interface 212; a pre-charging relay K42 and a pre-charging resistor R1, the pre-charging relay K42 and the pre-charging resistor R1 are connected in series and then connected in parallel with the main negative relay K41.

[0064] That is to say, during the pre-charging process, the pre-charging relay K42 is first controlled to be closed and the main negative relay K41 is disconnected, so as to limit the current through the pre-charging resistor to avoid excessive current during high-voltage charging and damage to the high-voltage load. After the voltage of the high-voltage load reaches the target voltage, the pre-charging relay K42 is controlled to be disconnected and the main negative relay K41 is closed to continue charging the load.

[0065] In some embodiments, the main high-voltage box 20 also includes: at least one charging positive relay K11, one end of the at least one charging positive relay K11 is respectively connected to the other end of the main positive DC bus, and the other end of the at least one charging positive relay K11 is respectively connected to at least one charging positive interface 221 of the main high-voltage box 20; at least one charging negative relay K12, one end of the at least one charging negative relay K12 is respectively connected to the other end of the main negative DC bus, and the other end of the at least one charging negative relay K12 is respectively connected to at least one charging negative interface 222 of the main high-voltage box 20; wherein, the at least one charging positive interface 221 and the at least one charging negative interface 222 are suitable for being connected to the charging circuit of a charging device to charge the battery pack through the charging device.

[0066] Taking Figure 2 as an example, the main high-voltage box 20 includes two positive charging interfaces 221 and two negative charging interfaces 222. These interfaces can correspond to two charging plugs of an external charging device, or can correspond to a single charging plug of an external charging device. For example, one positive charging interface 221 and one negative charging interface 222 constitute a single charging interface, although this is not a limitation. The two positive charging interfaces 221 are connected to the main positive DC busbar via corresponding positive charging relays K11, and the two negative charging interfaces 222 are connected to the main negative DC busbar via corresponding negative charging relays K12. After the external charging device's charging interface establishes a connection with the positive charging interface 221 and negative charging interface 222 of the main high-voltage box 20, the main high-voltage box 20 controls the positive charging relays K11 and K12 to energize, activating the charging circuit and charging the battery pack 11 through the charging device. When charging is complete or charging conditions are not met, the main high-voltage box 20 controls the positive charging relays K11 and K12 to de-energize, disconnecting the charging circuit and preventing charging.

[0067] Specifically, a charging circuit can be selected based on the charging demand and the connection of the charging interface to control the charging positive relay K11 and the charging negative relay K12. For example, when only one charging positive interface 221 and one charging negative interface 222 are connected to the external charging device, the corresponding charging positive relay K11 and charging negative relay K12 can be controlled to be energized to charge through one charging positive interface 221 and one charging negative interface 222; when both charging positive interfaces 221 and two charging negative interfaces 222 are connected to the external charging device, when the charging demand is large, the two charging positive relays K11 and the two charging negative relays K12 can be controlled to be energized to charge through two groups of charging positive interfaces 221 and charging negative interfaces 222; when the charging demand is small, one of the charging positive relays K11 and one of the charging negative relays K12 can be controlled to be energized to charge through one group of charging positive interfaces 221 and charging negative interfaces 222.

[0068] In some embodiments, the main high-voltage box 20 also includes: an auxiliary relay K13 and a first high-voltage protection module 23, one end of the auxiliary relay K13 is connected to the other end of the main positive DC bus, and the other end of the auxiliary relay K13 is connected to the auxiliary power supply positive interface 213 of the main high-voltage box 20 through the first high-voltage protection module 23, and the other end of the main negative DC bus is also connected to the auxiliary power supply negative interface 214 of the main high-voltage box 20; wherein, the auxiliary power supply positive interface 213 and the auxiliary power supply negative interface 214 are suitable for being connected to the auxiliary power supply circuit of the vehicle to supply power to the auxiliary high-voltage load of the vehicle through the battery pack.

[0069] Specifically, the auxiliary high-voltage load may be set based on the operation requirements of the vehicle. For example, the auxiliary high-voltage load may be a water pump, a compressor, etc. of a water cooling system of the vehicle.

[0070] The vehicle's auxiliary power supply circuit draws power from the main positive DC bus and the main negative DC bus through the auxiliary power supply positive interface 213 and the auxiliary power supply negative interface 214 to supply power to the auxiliary high-voltage loads. During the power supply process, the main high-voltage box 20 can control the auxiliary relay K13 according to actual conditions. For example, when it is determined that the power supply system has sufficient power, the auxiliary relay K13 is controlled to close to supply power to the auxiliary high-voltage loads; when it is determined that the power supply system has low power, the auxiliary relay K13 is controlled to open to stop supplying power to the auxiliary high-voltage loads, so that the power supply system gives priority to supplying power to the vehicle's main high-voltage loads to meet the vehicle's operating needs. Specifically, the power situation can be obtained based on the communication between the main high-voltage box 20 and the slave high-voltage box 12.

[0071] In addition, when the power supply system supplies power to auxiliary high-voltage loads, the power supply circuit is protected by the first high-voltage protection module 23. For example, the first high-voltage protection module 23 includes a fuse to disconnect the power supply when the current on the power supply line exceeds a current threshold.

[0072] In some embodiments, the main high-voltage box 20 further includes a second high-voltage protection module 24 , which is connected in series to the main positive DC bus to provide high-voltage protection for the main DC bus.

[0073] For example, the second high-voltage protection module 24 may include a fuse, which can disconnect the main positive DC bus when the current on the main positive DC bus exceeds a preset current threshold. The second high-voltage protection module 24 may also include a fuse and a manual maintenance switch, which can control the disconnection of the main positive DC bus when the current on the main positive DC bus exceeds a preset current threshold. The manual maintenance switch can be manually controlled by an operator. For example, when circuit maintenance or emergency circuit disconnection is required, the operator controls the manual maintenance switch to be disconnected to put the main positive DC bus in a disconnected state and achieve power-off control. When power restoration is required, the operator controls the manual maintenance switch to be closed to restore power to the main positive DC bus.

[0074] In some embodiments, the master high-voltage box 20 further includes a master battery management unit 25, which is connected to the pre-charge unit 40, at least one positive charging relay K11, at least one negative charging relay K12, and the auxiliary relay K13, respectively, to control the pre-charge unit 40, at least one positive charging relay K11, at least one negative charging relay K12, and the auxiliary relay K13. The master battery management unit 25 is also connected to the low-voltage interfaces 33 of the plurality of master quick-change connectors to exchange information with the slave high-voltage box 12, and to the low-voltage interface of the master high-voltage box 20 to exchange information with the first external device 200. In other words, the master battery management unit can implement functions such as charge and discharge control and information exchange.

[0075] The low-voltage interfaces 33 of multiple master quick-change connectors are connected to the low-voltage interfaces 133 of corresponding slave quick-change connectors to form a communication loop. In the embodiment shown in Figure 2, the power supply system includes three battery-swap boxes 10, and the master high-voltage box 20 is connected to the slave quick-change connectors 13 of the battery-swap boxes 10 via the master quick-change connector 30, so that information exchange between the three slave high-voltage boxes 12 and the master high-voltage box 20 can be achieved through the low-voltage interface.

[0076] Specifically, the main battery management unit 25 controls the vehicle's main power supply circuit through the pre-charging unit 40 to control the discharge process of the power supply system; controls the charging positive relay K11 and the charging negative relay K12 to control the charging circuit to control the charging process of the power supply system; controls the auxiliary power supply circuit of the vehicle by controlling the on-off of the auxiliary relay K13 to control the discharge process of the power supply system; and connects to the low-voltage interface 33 of multiple main quick-change connectors to exchange information with the high-voltage box 12. Specifically, it can realize status monitoring of the battery pack 11 in the battery swap box 10 connected to the main high-voltage box 20, and send control signals such as charging and discharging to the corresponding battery swap box 10 through information interaction, so as to further control the charging and discharging of the corresponding battery swap box 10; by connecting to the low-voltage interface 26 of the main high-voltage box, it can interact with the first external device 200 for information, so as to realize receiving the signals sent by the first external device 200, such as charging control signals, discharging control signals, etc., and control the pre-charging unit 40, at least one charging positive relay K11, at least one charging negative relay K12 and the auxiliary relay K13 based on the signals sent by the first external device 200, and perform signal interaction with the battery swap box 10 connected to the main high-voltage box 20 to realize charging and discharging control of the battery swap box 10, etc. In addition, the main battery management unit 25 can also send the obtained feedback signals, monitoring signals and other information to the first external device 200, such as the battery status signal, charging and discharging status signal, fault detection signal fed back by each battery swap box 10, and the status signal, fault detection signal, etc. of the main high-voltage box 30. Among them, the first external device 200 can be a vehicle controller, a vehicle-mounted control terminal, etc.

[0077] In some embodiments, the main high-voltage box 20 also includes: a main high-voltage acquisition unit 27, which is configured to collect the main DC bus voltage for fault diagnosis; the main battery management unit 25 is also connected to the main high-voltage acquisition unit 27 through a first main communication bus, and is configured to receive the fault diagnosis results of the main high-voltage acquisition unit 27.

[0078] The main high-voltage acquisition unit 27 acquires the main DC bus voltage and performs fault diagnosis based on the acquired main DC bus voltage. For example, when the main DC bus voltage exceeds the main voltage threshold, the main high-voltage acquisition unit 27 determines that an overvoltage fault has occurred in the main DC bus and sends the diagnosis result of the overvoltage fault to the main battery management unit 25. The main battery management unit 25 can control the main DC bus to be disconnected based on the diagnosis result of the overvoltage fault, for example, controlling the end of charging during the charging process and controlling the end of power supply during the power supply process to protect the power supply system.

[0079] Among them, the first main communication bus is a bus for transmitting information between modules, which can be selected based on actual conditions. Figure 4 uses SCAN as the first main communication bus.

[0080] In some embodiments, the master high-voltage box 20 further includes: a master wireless communication unit 28, to which the master battery management unit 25 is further connected via a first master communication bus, for information exchange with a second external device 300; and / or a master remote debugging bridge 29, to which the master battery management unit 25 is further connected via a second master communication bus, for information exchange with a remote device 400. The second master communication bus is a bus for information transmission between modules and can be selected based on actual circumstances. FIG4 illustrates the DCAN as the second master communication bus.

[0081] It should be noted that both SCAN and DCAN are CAN (Controller Area Network) buses, but they have different functions. SCAN mainly detects the transmission of high voltage, temperature and other data, while DCAN mainly uploads some summary data to the cloud platform.

[0082] The main wireless communication unit 28 can adopt a ZigBee wireless communication module, a wireless Bluetooth module (such as a BLE (Bluetooth Low Energy) module, a WiFi communication module, etc. The main battery management unit 25 exchanges information with the second external device 300 based on wireless communication through the main wireless communication unit 28. The second external device 300 can be a vehicle key, a user terminal, etc.

[0083] The main remote debugging bridge 29 is used to connect the main battery management unit 25 and the remote device 400 to a network. Specifically, a debugger, namely the main remote debugging bridge 29, is started on the computer where the program to be debugged is running, namely the main battery management unit 25, and the debugger is connected to the developer's computer, namely the remote device 400, so that the developer can perform program debugging operations on the main battery management unit 25 on the remote device 400.

[0084] As shown in Figures 5 and 6, in some embodiments, the battery pack 11 includes: at least one battery cell module 111, which is connected in series and / or in parallel, and is connected to the high-voltage interface 121 of the corresponding slave high-voltage box through the high-voltage interface 112 of the battery pack, and is configured to provide electrical energy; at least one battery monitoring unit 113, which is connected to the low-voltage interface 122 of the corresponding slave high-voltage box through the low-voltage interface 114 of the battery pack, and is configured to monitor the at least one battery cell module 111 and send the monitoring results to the corresponding slave high-voltage box 12.

[0085] The battery cell module 111 is a module structure composed of multiple battery cells connected in series and / or in parallel. Multiple battery cell modules 111 are connected in series and / or in parallel to form a battery pack 11 to perform electrical energy storage and power supply functions. Based on the high-voltage interface 112 of the battery pack and the corresponding high-voltage interface 121 of the slave high-voltage box, when the corresponding high-voltage interface 121 of the slave high-voltage box is connected to the main high-voltage box 20 through the main quick-change connector 30, the battery pack 11 realizes the charging and power supply process based on the corresponding high-voltage interface 121 of the slave high-voltage box, the main quick-change connector 30 and the main high-voltage box 20.

[0086] The battery monitoring unit 113 is used to monitor the status of the battery module 111 in the battery pack 11 to obtain the status monitoring signal of the battery module 111, such as the voltage monitoring signal, current monitoring signal, temperature monitoring signal, etc. of the battery module 111, and send the monitoring results to the corresponding slave high-voltage box 12. When the high-voltage interface 121 of the corresponding slave high-voltage box is connected to the main high-voltage box 20 through the main quick-change connector 30, the monitoring results of the battery module 111 can be sent to the main high-voltage box 30 through the low-voltage interface 122 of the slave high-voltage box.

[0087] This embodiment integrates the battery cell module 111 and the battery monitoring unit 113 into the battery pack 11 to improve monitoring reliability.

[0088] In some embodiments, the slave high-voltage box 12 includes: a slave positive DC bus and a slave positive relay K21, one end of the slave positive DC bus is connected to the high-voltage positive interface of the slave high-voltage box 12, the other end of the slave positive DC bus is connected to the high-voltage positive interface 131 of the corresponding slave quick-change connector, and the slave positive relay K21 is connected in series on the slave positive DC bus; a slave negative DC bus and a slave negative relay K22, one end of the slave negative DC bus is connected to the high-voltage negative interface of the slave high-voltage box 12, the other end of the slave negative DC bus is connected to the high-voltage negative interface 132 of the corresponding slave quick-change connector, and the slave negative relay K22 is connected in series on the slave negative DC bus.

[0089] That is to say, the electric energy provided by the battery pack 11 is output from the positive DC bus and the negative DC bus, and can be controlled by the positive relay K21 and the negative relay K22 to be attracted, so that the positive DC bus and the negative DC bus are in the on state to carry out the charging and discharging process; and by controlling the positive relay K21 and the negative relay K22 to be disconnected, so that the positive DC bus and the negative DC bus are in the disconnected state.

[0090] In some embodiments, the slave high-voltage box 12 further includes: a third high-voltage protection module 123 , which is connected in series to the slave positive DC bus.

[0091] The third high-voltage protection module 123 is used to provide charging and discharging protection for the slave positive DC bus. For example, the third high-voltage protection module 123 is a fuse. When the current of the slave positive DC bus exceeds a preset current, the fuse controls the slave positive DC bus to be disconnected. Alternatively, the third high-voltage protection module 123 includes a fuse and a manual maintenance switch. On the one hand, the fuse can be used to disconnect the slave positive DC bus when the current on the slave positive DC bus exceeds a preset current threshold to provide high-voltage protection. The manual maintenance switch can be manually controlled by an operator. For example, when circuit maintenance or emergency circuit disconnection is required, the operator controls the manual maintenance switch to be disconnected to disconnect the slave positive DC bus and achieve power-off control. When power restoration is required, the operator controls the manual maintenance switch to be closed to restore power to the slave positive DC bus.

[0092] In some embodiments, the slave high-voltage box 12 further includes a slave battery management unit 124, which is connected to the slave positive relay K21 and the slave negative relay K22, respectively, to control the on / off of the slave positive relay K21 and the slave negative relay K22, and is connected to the low-voltage interface 122 of the slave high-voltage box via a first slave communication bus to exchange information with the battery pack 11, and is connected to the low-voltage interface 133 of the corresponding slave quick-change connector to exchange information with the master high-voltage box 20. The first slave communication bus is a bus for transmitting information between modules and can be selected based on actual conditions. FIG6 uses SCAN as the first slave communication bus.

[0093] The slave battery management unit 124 controls the slave positive relay K21 and the slave negative relay K22 to control the slave positive DC bus and the slave negative DC bus to control the charging and discharging process of the battery pack 11; it is connected to the low-voltage interface 122 of the slave high-voltage box to interact with the battery pack 11, such as receiving monitoring information of the battery pack 11 and sending control signals to the battery pack 11; it is connected to the low-voltage interface 133 of the corresponding slave quick-change connector. When the battery exchange box 10 is connected to the main high-voltage box 20 through the main quick-change connector 30, it can interact with the main high-voltage box 20, such as receiving control signals from the main high-voltage box 20 and sending monitoring information of the battery pack 11 to the main high-voltage box 20.

[0094] In some embodiments, the slave high-voltage box 12 also includes: a slave high-voltage acquisition unit 125, which is configured to acquire the slave DC bus voltage for fault diagnosis; the slave battery management unit 124 is also connected to the slave high-voltage acquisition unit 125 via a first slave communication bus, and is configured to receive the fault diagnosis results of the slave high-voltage acquisition unit 125.

[0095] Specifically, the slave high-voltage acquisition unit 125 acquires the slave DC bus voltage and performs fault diagnosis based on the acquired slave DC bus voltage. For example, when the slave DC bus voltage exceeds the slave voltage threshold, the slave high-voltage acquisition unit 125 determines that an overvoltage fault has occurred in the slave DC bus, and sends the diagnosis result of the slave DC bus overvoltage fault to the slave battery management unit 124. The slave battery management unit 124 can control the on and off of the slave DC bus based on the diagnosis result of the slave DC bus overvoltage fault. For example, during the charging process, when the slave battery management unit 124 determines that a slave DC bus overvoltage fault has been received, the charging is controlled to end. During the power supply process, when the slave battery management unit 124 determines that a slave DC bus overvoltage fault has been received, the power supply is controlled to end for high-voltage protection. In addition, the slave battery management unit 124 can also send the diagnosis result of the slave DC bus overvoltage fault to the main high-voltage box 20.

[0096] In some embodiments, the slave high-voltage box 12 further includes: a slave wireless communication unit 126, to which the slave battery management unit 124 is further connected via a first slave communication bus, so as to exchange information with the second external device 300 via the slave wireless communication unit 126; and / or a positioning unit 127, to which the slave battery management unit 124 is further connected via a second slave communication bus, so as to obtain the location information of the slave high-voltage box 12 via the positioning unit 127; and / or a slave remote debugging bridge 128, to which the slave battery management unit 124 is further connected via a second slave communication bus, so as to exchange information with the remote device 400 via the slave remote debugging bridge 128. The second slave communication bus is a bus for transmitting information between modules and can be selected based on actual conditions. FIG6 uses DCAN as the second slave communication bus.

[0097] The slave wireless communication unit 126 may adopt a ZigBee wireless communication module, a wireless Bluetooth module (such as a BLE module, a Wi-Fi communication module, etc.). The slave battery management unit 124 implements information exchange with the second external device 300 based on wireless communication through the slave wireless communication unit 126.

[0098] The positioning unit 127 is used to determine the location information of the distribution box 10 to facilitate the feedback of the location information during the battery replacement process. The positioning unit 127 can adopt a GPS (Global Positioning System) unit, etc.

[0099] The slave remote debugging bridge 128 is used to establish a network connection between the slave battery management unit 124 and the remote device 400 , so that developers can debug the program on the slave battery management unit 124 based on the remote device 400 .

[0100] In addition, in some embodiments of the present disclosure, each battery exchange box 10 also includes: a water-cooled heat exchange component 14, which is suitable for being connected to an external water cooling device 500 through a water cooling interface 15 of the battery exchange box, and is configured to perform heat exchange on the battery exchange box 10 based on hot water or cold water provided by the external water cooling device 500.

[0101] The water-cooled heat exchange assembly 14 may include refrigerant pipelines arranged corresponding to the battery pack 11 and refrigerant pipelines arranged corresponding to the slave battery management unit 124. The water-cooled heat exchange assembly 14 is connected to the external water cooling device 500 through the water cooling interface 15 of the battery swap box. The hot or cold water provided by the external water cooling device 500 can flow into the water-cooled heat exchange assembly 14 through the water cooling interface 15 of the battery swap box to exchange heat with the battery swap box 10 through the water-cooled heat exchange assembly 14.

[0102] Compared with the technical solution of using heating elements for heat exchange, this embodiment reduces the wiring harness arrangement cost.

[0103] In the technical solution of the embodiment of the present disclosure, each battery swap box 10 is independent of each other, and the user can select the power according to the demand, thereby improving the flexibility of the use space and the application reliability of the battery swap box 10. At the same time, during the battery swap process, the user can also perform battery swap operations on one or more of the battery swap boxes 10 to improve the flexibility of battery swap. In each battery swap box 10, the battery pack 11 is connected to the slave quick-change connector 13 through the slave high-voltage box 12. When the main high-voltage box 20 is connected to the slave quick-change connector 13 of the battery swap box 10 through the main quick-change connector 30, the battery pack 11 can be connected to the power supply interface of the main high-voltage box 20 through the slave high-voltage box 12, the slave quick-change connector 13, and the main quick-change connector 30 to establish a power supply circuit to power the load, or the battery pack 11 is connected to the charging interface of the main high-voltage box 20 through the slave high-voltage box 12, the slave quick-change connector 13, and the main quick-change connector 30 to establish a charging circuit, and the external power supply charges the battery pack 11 through the charging circuit.

[0104] At the same time, the power supply system can perform a pre-charging operation based on the pre-charging unit 40. That is, in the process of transmitting the electric energy of the battery pack 11 to at least one main power supply positive interface 211 and at least one main power supply negative interface 212 through the main high-voltage box 20 and the slave high-voltage box 12, the main power supply negative interface 212 first limits the current on the main negative DC bus through the pre-charging resistor R1 in the pre-charging unit 40 to pre-charge the main high-voltage load of the vehicle. After the voltage of the main high-voltage load reaches the target voltage, the main power supply negative interface 212 is controlled to be directly connected to the main negative DC bus to continue charging the main high-voltage load to ensure charging safety and avoid excessive current at the moment of high-voltage charging, which may cause damage to the equipment.

[0105] At the same time, when the main quick-change connector 30 is connected to the slave quick-change connector 13, the main high-voltage box 20 and the slave high-voltage box 12 exchange information to perform charging and discharging, power on and off, and other controls. For example, when the main high-voltage box 20 receives a high-voltage power-on instruction, it can control the distribution box 10 to power on in sequence, and determine the power-on status of each distribution box 10 through information interaction with the slave high-voltage box 12; when the main high-voltage box 20 receives a high-voltage power-off instruction, it can control the distribution box 10 to power off in sequence, and determine the power-off status of each distribution box 10 through information interaction with the slave high-voltage box 12; during application, the slave high-voltage box 12 can obtain status information such as the battery pack status and bus status in the distribution box 10, and send the status information to the main high-voltage box 20. The main high-voltage box 20 controls each distribution box 10 according to the status information of each distribution box 10, and at the same time summarizes and processes each status information to send the processed information to an external device, such as a vehicle controller.

[0106] Therefore, the present invention integrates the junction box and control box in the battery swap box in the related art. Compared with the independent design of the junction box and control box in the related art, it improves the system integration and space utilization, and reduces the cost of wiring harnesses and connectors.

[0107] Corresponding to the above embodiments, the present disclosure also proposes a vehicle.

[0108] As shown in FIG7 , the vehicle 1000 according to the embodiment of the present disclosure includes the vehicle power supply system 100100 described above.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present disclosure, and they should all be included in the scope of the claims and specification of the present disclosure. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present disclosure is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. Vehicle power supply system, wherein, The system includes: At least one independent battery swapping box, each of the battery swapping boxes includes a battery pack, a slave high-voltage box, and a slave quick-change connector, and the slave high-voltage box is respectively connected to the corresponding battery pack and the slave quick-change connector; A main high-voltage box, the main high-voltage box is connected with a plurality of main quick-change connectors, each of the main quick-change connectors is adapted to connect to one of the slave quick-change connectors, the main high-voltage box includes a main positive DC bus, a main negative DC bus, and a pre-charge unit, one end of the main positive DC bus is respectively connected to the high-voltage positive interfaces of the plurality of main quick-change connectors, the other end of the main positive DC bus is respectively connected to at least one main power supply positive interface of the main high-voltage box, one end of the main negative DC bus is respectively connected to the high-voltage negative interfaces of the plurality of main quick-change connectors, and the other end of the main negative DC bus is respectively connected to at least one main power supply negative interface of the main high-voltage box through the pre-charge unit; Wherein, when the main quick-change connector is connected to the slave quick-change connector, the electric energy of the battery pack is transmitted to the at least one main power supply positive interface and the at least one main power supply negative interface through the main high-voltage box and the slave high-voltage box to supply power to the main high-voltage load of the vehicle.

2. The system according to claim 1, wherein, The pre-charge unit includes: A main negative relay, one end of the main negative relay is connected to the other end of the main negative DC bus, and the other end of the main negative relay is respectively connected to the at least one main power supply negative interface; A pre-charge relay and a pre-charge resistor, the pre-charge relay and the pre-charge resistor are connected in series and are in parallel with the main negative relay.

3. The system according to claim 1 or 2, wherein, The main high-voltage box further includes: At least one charging positive relay, one end of the at least one charging positive relay is respectively connected to the other end of the main positive DC bus, and the other end of the at least one charging positive relay is respectively connected to at least one charging positive interface of the main high-voltage box correspondingly; At least one charging negative relay, one end of the at least one charging negative relay is respectively connected to the other end of the main negative DC bus, and the other end of the at least one charging negative relay is respectively connected to at least one charging negative interface of the main high-voltage box correspondingly; Wherein, the at least one charging positive interface and the at least one charging negative interface are adapted to be connected to the charging circuit of a charging device to charge the battery pack through the charging device.

4. The system according to claim 3, wherein, The main high-voltage box further includes: An auxiliary relay and a first high-voltage protection module, one end of the auxiliary relay is connected to the other end of the main positive DC bus, and the other end of the auxiliary relay is connected to the auxiliary power supply positive interface of the main high-voltage box through the first high-voltage protection module, and the other end of the main negative DC bus is also connected to the auxiliary power supply negative interface of the main high-voltage box; Wherein, the auxiliary power supply positive interface and the auxiliary power supply negative interface are adapted to be connected to the auxiliary power supply circuit of the vehicle to supply power to the auxiliary high-voltage load of the vehicle through the battery pack.

5. The system according to any one of claims 1-4, wherein, The main high-voltage box further includes: A second high-voltage protection module, the second high-voltage protection module is connected in series on the main positive DC bus.

6. The system according to claim 4, wherein, The main high-voltage box further includes: A main battery management unit, which is respectively connected to the pre-charge unit, the at least one charging positive relay, the at least one charging negative relay and the auxiliary relay to control the pre-charge unit, the at least one charging positive relay, the at least one charging negative relay and the auxiliary relay, and is respectively connected to the low-voltage interfaces of the multiple main quick-change connectors to perform information interaction with the slave high-voltage box, and is connected to the low-voltage interface of the main high-voltage box to perform information interaction with a first external device.

7. The system according to claim 6, wherein, The main high-voltage box further includes: A main high-voltage acquisition unit configured to acquire the main DC bus voltage for fault diagnosis; The main battery management unit is further connected to the main high-voltage acquisition unit through a first main communication bus and is configured to receive the fault diagnosis result of the main high-voltage acquisition unit.

8. The system according to claim 6 or 7, wherein The main high-voltage box further includes: A main wireless communication unit, and the main battery management unit is further connected to the main wireless communication unit through a first main communication bus to perform information interaction with a second external device through the main wireless communication unit; and / or, A main remote debugging bridge, and the main battery management unit is further connected to the main remote debugging bridge through a second main communication bus to perform information interaction with a remote device through the main remote debugging bridge.

9. The system according to any one of claims 1-8, wherein, The battery pack includes: At least one battery cell module, which is connected to the high-voltage interface of the corresponding slave high-voltage box through the high-voltage interface of the battery pack after being connected in series and / or in parallel, and is configured to provide electric energy; At least one battery monitoring unit, which is connected to the low-voltage interface of the corresponding slave high-voltage box through the low-voltage interface of the battery pack, and is configured to monitor the at least one battery cell module and send the monitoring result to the corresponding slave high-voltage box.

10. The system according to any one of claims 1-9, wherein, The slave high-voltage box includes: A slave positive DC bus and a slave positive relay, one end of the slave positive DC bus is connected to the high-voltage positive interface of the slave high-voltage box, the other end of the slave positive DC bus is connected to the high-voltage positive interface of the corresponding slave quick-change connector, and the slave positive relay is connected in series on the slave positive DC bus; A slave negative DC bus and a slave negative relay, one end of the slave negative DC bus is connected to the high-voltage negative interface of the slave high-voltage box, the other end of the slave negative DC bus is connected to the high-voltage negative interface of the corresponding slave quick-change connector, and the slave negative relay is connected in series on the slave negative DC bus.

11. The system according to claim 10, wherein, The slave high-voltage box further includes: A third high-voltage protection module, which is connected in series on the slave positive DC bus.

12. The system according to claim 10 or 11, wherein, The slave high-voltage box further includes: A slave battery management unit, which is respectively connected to the slave positive relay and the slave negative relay to control the slave positive relay and the slave negative relay, and is connected to the low-voltage interface of the slave high-voltage box through a first slave communication bus to perform information interaction with the battery pack, and is connected to the low-voltage interface of the corresponding slave quick-change connector to perform information interaction with the main high-voltage box.

13. The system according to claim 12, wherein, The slave high-voltage box further includes: A slave high-voltage acquisition unit configured to acquire the slave DC bus voltage for fault diagnosis; The slave battery management unit is also connected to the slave high-voltage acquisition unit through the first slave communication bus, and is configured to receive the fault diagnosis result of the slave high-voltage acquisition unit.

14. The system according to claim 12 or 13, wherein, The slave high-voltage box further includes: A slave wireless communication unit, the slave battery management unit is also connected to the slave wireless communication unit through the first slave communication bus to perform information interaction with a second external device through the slave wireless communication unit; and / or, A positioning unit, the slave battery management unit is also connected to the positioning unit through a second slave communication bus to obtain the position information of the slave high-voltage box through the positioning unit; and / or, A slave remote debugging bridge, the slave battery management unit is also connected to the slave remote debugging bridge through the second slave communication bus to perform information interaction with a remote device through the slave remote debugging bridge.

15. A vehicle, comprising the vehicle power supply system according to any one of claims 1-14.

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