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 independently operated battery swapping box (10), each battery swapping box (10) comprising a battery pack (11), a secondary high-voltage box (12) and a secondary quick-swap connector (13), and the secondary high-voltage box (12) being respectively connected to the corresponding battery pack (11) and secondary quick-swap connector (13); and a primary high-voltage box (20) connected to a plurality of primary quick-swap connectors (30), each primary quick-swap connector (30) being configured to be connected to one secondary quick-swap connector (13), wherein when the primary quick-swap connectors (30) are connected to the quick-swap connectors (13), the primary high-voltage box (20) exchanges information with the secondary high-voltage boxes (12), and the electric energy of the battery packs (11) is transmitted to a power supply interface (21) of the primary high-voltage box (20), or the electric energy of a charging interface (22) of the primary high-voltage box (20) is transmitted to the battery packs (11).

Description

Vehicle power supply system and vehicle

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to Chinese patent application number 202323594398.X, 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 box. 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. The junction box and control box of the battery swap box in the related technology are integrated into a design, thereby improving the system integration and space utilization, reducing the cost of wiring harnesses and connectors, and having the advantages of maintainability, wide applicability, and high safety and reliability.

[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, and each main quick-change connector is suitable for connecting to a slave quick-change connector; wherein, when the main quick-change connector is connected to the slave quick-change connector, the main high-voltage box and the slave high-voltage box exchange information, and transmit the power of the battery pack to the power supply interface of the main high-voltage box or transmit the power of the charging interface of the main high-voltage box to the battery pack.

[0009] In the technical solution of the embodiment of the present disclosure, each battery swap box is independent of each other, and users can select the power according to their needs, thereby improving the flexibility of the use space and application reliability of the battery swap box. At the same time, during the battery swap process, users 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 power supply circuit to power the load, or the battery pack can be connected to the charging 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 charging circuit, and the external power supply charges the battery pack through the charging circuit. At the same time, when the main quick-change connector is connected to the slave quick-change connector, the main high-voltage box and the slave high-voltage box exchange information to perform charging and discharging control. That is to say, the slave high-voltage box in each battery swap box has wiring and control functions, that is, the present disclosure 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.

[0010] In some embodiments, the main high-voltage box includes: a main positive DC bus, one end of the main positive DC bus is respectively connected to the high-voltage positive interface of 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 of the main high-voltage box; a main negative DC bus, one end of the main negative DC bus is respectively connected to the high-voltage negative interface of 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; wherein, at least one main power supply positive interface and at least one main power supply negative interface are suitable for being connected to the main power supply circuit of the vehicle to supply power to the main high-voltage load of the vehicle through the battery pack.

[0011] In this embodiment, the main power supply positive interface and the main power supply negative interface are directly connected to the main positive DC bus and the main negative DC bus. The main circuit has no relays and pre-charge circuits, reducing the cost of the main high-voltage box.

[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 first high-voltage protection module includes a fuse, so as to disconnect the power supply when the current on the power supply line supplying power to the auxiliary high-voltage load exceeds a current threshold.

[0017] 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.

[0018] In some embodiments, the second high-voltage protection module includes a fuse and a manual maintenance switch.

[0019] The fuse disconnects the main positive DC bus for high-voltage protection when the current on the bus exceeds a preset threshold. The operator can manually control the manual maintenance switch. For example, if circuit maintenance or emergency circuit breaker operations are required, the operator can open the manual maintenance switch to disconnect the main positive DC bus, achieving power outage control. To restore power, the operator closes the manual maintenance switch to restore power to the main positive DC bus.

[0020] In some embodiments, the master high-voltage box further includes a master battery management unit (BMU), which is connected to at least one positive charging relay, at least one negative charging relay, and an auxiliary relay, respectively, to control the on / off of the at least one positive charging relay, at least one negative charging relay, and the auxiliary relay. The BMU 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 BMU can implement functions such as charge and discharge control and information exchange.

[0021] In some embodiments, the main high-voltage box also includes: a main high-voltage acquisition unit, configured to acquire the main DC bus voltage for fault diagnosis; the main battery management unit is also connected to the main high-voltage acquisition unit through a first main communication bus, and is configured to receive the fault diagnosis results of the main high-voltage acquisition unit.

[0022] The main battery management unit can control the main DC bus based on the fault diagnosis results of the main high-voltage acquisition unit, and can also send the fault diagnosis results to external devices for high-voltage protection.

[0023] 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.

[0024] The main battery management unit can exchange information 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] In some embodiments, the third high-voltage protection module includes a fuse and a manual maintenance switch.

[0031] The fuse disconnects the slave positive DC bus for high-voltage protection when the current on the slave positive DC bus exceeds a preset threshold. A manual maintenance switch allows the operator to manually open and close the slave positive DC bus to meet actual needs.

[0032] 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 on / off of the slave positive relay and the slave negative relay. The slave battery management unit 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. Integrating the junction box and control box of related art into the slave battery management unit improves system integration and reduces application costs.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] In some embodiments, the slave high-voltage box further includes: a current detection unit configured to detect the slave DC bus current; and the slave battery management unit is further connected to the current detection unit to receive the slave DC bus current, thereby realizing current detection of the slave DC bus.

[0038] In some embodiments, each battery swap box further includes a water-cooled heat exchange assembly adapted to connect to an external water cooling device via the battery swap box's water cooling interface. The water-cooled heat exchange assembly is configured to exchange heat for the battery swap box using hot or cold water provided by the external water cooling device. Compared to solutions employing heating elements for heat exchange, this reduces wiring harness layout costs.

[0039] In a second aspect, the present disclosure provides a vehicle comprising the above-mentioned vehicle power supply system.

[0040] 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

[0041] 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:

[0042] FIG1 is a connection diagram of a vehicle power supply system according to some embodiments of the present disclosure;

[0043] FIG2 is a connection diagram of a vehicle power supply system according to some embodiments of the present disclosure;

[0044] FIG3 is a schematic diagram of the connection of a main high-voltage box according to some embodiments of the present disclosure;

[0045] FIG4 is a connection diagram of a main battery management unit according to some embodiments of the present disclosure;

[0046] FIG5 is a connection diagram of a battery-swapping box according to some embodiments of the present disclosure;

[0047] FIG6 is a connection diagram of a slave battery management unit according to some embodiments of the present disclosure;

[0048] FIG7 is a block diagram of a vehicle according to some embodiments of the present disclosure.

[0049] 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, current detection unit 129, 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-cooled heat exchange component 14, water-cooled interface 15 of battery exchange box, main high voltage box 20, power supply interface 21, 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 interface 22, 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, first external device 200, second external device 300, remote device 400, external water cooling device 500, vehicle 1000. DETAILED DESCRIPTION

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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).

[0056] 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.

[0057] 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.

[0058] 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.

[0059] However, the fixed connection between the battery swap boxes in the above-mentioned power supply system means that 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. At the same time, the independent design of the junction box and the control box makes the integration of the entire system insufficient, the space utilization rate is low, and the cost of wiring harnesses and connectors is increased. In addition, the control box and the junction box also need to be connected through a low-voltage wiring harness, which reduces the reliability of communication, further increases the number of connection nodes in the battery swap box, increases the reliability risk of high-voltage connection and low-voltage communication, and is more expensive.

[0060] 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, users can also swap batteries on one or more of the battery swap boxes, thereby improving the flexibility of battery swapping. The junction box and control box of the battery swap box in the related technology are integrated into a design, thereby improving the system integration and space utilization, reducing the cost of wiring harnesses and connectors, and having the advantages of maintainability, wide applicability, and high safety and reliability.

[0061] The vehicle power supply system of the present disclosure is described below with reference to FIG1 .

[0062] As shown in Figure 1, the vehicle power supply system 100 in the present disclosure includes: at least one independent battery-swap box 10 and a main high-voltage box 20, wherein each battery-swap box 10 includes a battery pack 11, a slave high-voltage box 12 and a slave quick-change connector 13, and the slave high-voltage box 12 is respectively connected to the corresponding battery pack 11 and the slave quick-change connector 13. The main high-voltage box 20 is connected to a plurality of main quick-change connectors 30, and each main quick-change connector 30 is suitable for connecting to a slave quick-change connector 13. In which, 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, and transmit the electric energy of the battery pack 11 to the power supply interface 21 of the main high-voltage box 20 or transmit the electric energy of the charging interface 22 of the main high-voltage box 20 to the battery pack 11.

[0063] 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.

[0064] 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.

[0065] 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. 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.

[0066] 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.

[0067] When 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 power supply interface 21 and the charging interface 22 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. At the same time, the main high-voltage box 20 establishes information interaction with the slave high-voltage box 12. Therefore, based on the information interaction between the main high-voltage box 20 and the slave high-voltage box 12, for example, the slave high-voltage box 12 can send the status monitoring information of the battery swap box 10 to the master high-voltage box 20. The main high-voltage box 20 can control each battery swap box 10 based on the status monitoring information of each battery swap box 10 and the received control instructions to realize the charging and discharging control of the battery pack 11 of the battery swap box 10. Specifically, when the main high-voltage box 20 receives a power supply instruction and determines that the battery exchange box 10 is normal based on the status monitoring information of each battery exchange box 10, the main high-voltage box 20 can send the received power supply instruction to the slave high-voltage box 12 of the distribution box 10, and control the discharge of the battery pack 11 through the slave high-voltage box 12, and then output the electric energy of the battery pack 11 through the power supply interface 21 to power the load connected to the power supply interface 21; when the main high-voltage box 20 receives a charging instruction and determines that the battery exchange box 10 is normal based on the status monitoring information of each battery exchange box 10, the main high-voltage box 20 can send the received charging instruction to the slave high-voltage box 12 of the distribution box 10, and control the battery pack 11 through the slave high-voltage box 12 to charge the battery pack 11 with the electric energy provided by the external power supply connected to the charging interface 22.

[0068] Therefore, the slave high-voltage box 12 of this embodiment has not only a wiring function but also a control function, realizing the integration of the wiring box and the control box in the related art, improving the system integration and reducing costs. At the same time, each battery swap box 10 is independent of each other. Compared with the existing battery swap boxes connected together, the number of battery swap boxes 10 can be selected according to the actual needs of the user, improving the configuration flexibility and battery swap flexibility.

[0069] It should be noted that the slave quick-change connector 13 can adopt a national standard DC charging socket interface, and the main quick-change connector 303 is a national standard DC charging socket interface compatible with the slave quick-change connector 13. Therefore, the vehicle power supply system can be connected to an external power source through the charging interface 22 of the main high-voltage box 20 to charge the battery pack 11 in the system, or the battery swap box 10 can be replaced at a battery swap station and connected to the charging connector of an external charging device through the slave quick-change connector 13 of the battery swap box 10 to directly perform DC charging on the battery swap box 10 through the external device.

[0070] As shown in Figure 2, in some embodiments, the main high-voltage box 20 includes: a main positive DC bus, one end of the main positive DC bus is respectively connected to the high-voltage positive interface 31 of 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; a main negative DC bus, one end of the main negative DC bus is respectively connected to the high-voltage negative interface 32 of 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; wherein, at least one main power supply positive interface 211 and at least one main power supply negative interface 212 are suitable for being connected to the main power supply circuit of the vehicle to supply power to the main high-voltage load of the vehicle through the battery pack 11.

[0071] The high-voltage positive interfaces 31 of multiple master quick-change connectors are connected to the high-voltage positive interfaces 131 of corresponding slave quick-change connectors, and the high-voltage negative interfaces 32 of multiple master quick-change connectors are connected to the high-voltage negative interfaces 132 of corresponding slave quick-change connectors to form a power supply circuit to receive electrical energy from the corresponding battery-changing boxes 10. In the embodiment shown in FIG2 , the power supply system includes three battery-changing boxes 10, and the master high-voltage box 20 is connected to the slave quick-change connector 13 of the battery-changing box 10 via the master quick-change connector 30. The three battery-changing boxes 10 are powered in parallel to transmit the electrical energy of the battery-changing boxes 10 to the main positive DC bus and the main negative DC bus of the master high-voltage box 20.

[0072] 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.

[0073] The electric energy provided by each battery exchange box 10 is transmitted to the main positive DC bus and the main negative DC bus of the main high-voltage box 20, and then draws power from the main positive DC bus and the main negative DC bus through the main power supply positive interface 211 and the main power supply negative interface 212 to power the main power supply circuit.

[0074] In this embodiment, the main power supply positive interface 211 and the main power supply negative interface 212 are directly connected to the main positive DC bus and the main negative DC bus. The main circuit has no relays and pre-charge circuits, reducing the cost of the main high-voltage box 20.

[0075] 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 11 through the charging device.

[0076] Taking Figure 2 as an example, the main high-voltage box 20 includes two positive charging interfaces 221 and two negative charging interfaces 222, which can correspond to two charging guns of an external charging device, or can be set to correspond to one charging gun of an external charging device, without limitation here. The two positive charging interfaces 221 are connected to the main positive DC bus through corresponding positive charging relays K11, and the two negative charging interfaces 222 are connected to the main negative DC bus through corresponding negative charging relays K12. After the charging interface of the external charging device is connected to 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 relay K11 and the negative charging relay K12 to energize the charging circuit to conduct, and charge the battery pack 11 through the charging device. When charging is completed or the charging conditions are not met, the main high-voltage box 20 controls the positive charging relay K11 and the negative charging relay K12 to disconnect, so that the charging circuit is in a disconnected state and charging operation cannot be performed.

[0077] 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.

[0078] 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 K3 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 11.

[0079] 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.

[0080] 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, if 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; if 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. The specific power situation can be obtained based on communication with the slave high-voltage box 12.

[0081] In addition, when the power supply system supplies power to the auxiliary high-voltage load, the first high-voltage protection module 23 is used to protect the power supply circuit, for example, the power supply is controlled to be disconnected when the voltage exceeds a preset voltage.

[0082] In some embodiments of the present disclosure, the first high-voltage protection module 23 includes a fuse FU1 , which can disconnect the power supply when the current on the power supply line exceeds a current threshold.

[0083] In some embodiments of the present disclosure, 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 overvoltage and overcurrent protection for the main DC bus. For example, the second high-voltage protection module 24 may include a fuse FU2, which can disconnect the main positive DC bus when the current on the main positive DC bus exceeds a preset current threshold.

[0084] In some embodiments of the present disclosure, the second high-voltage protection module 24 includes a fuse FU2 and a manual maintenance switch K14.

[0085] Fuse FU2 disconnects the main positive DC bus when the current on the bus exceeds a preset threshold. Manual maintenance switch K14 can be manually controlled by the operator. For example, to perform circuit maintenance or emergency circuit breaker operations, the operator can open manual maintenance switch K14 to disconnect the main positive DC bus and achieve power outage control. When power restoration is required, the operator closes manual maintenance switch K14 to restore power to the main positive DC bus.

[0086] In combination with what is shown in FIG3 , in some embodiments, the main high-voltage box 20 further includes: a main battery management unit 25, which is respectively connected to at least one positive charging relay K11, at least one negative charging relay K12, and an auxiliary relay K13 to perform on-off control on at least one positive charging relay K11, at least one negative charging relay K12, and the auxiliary relay K13, and is respectively connected to the low-voltage interfaces 33 of a plurality of main quick-change connectors to perform information interaction with the slave high-voltage box 12, and is connected to the low-voltage interface 26 of the main high-voltage box to perform information interaction with the first external device 200.

[0087] 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.

[0088] Specifically, the main battery management unit 25 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, and controls the auxiliary power supply circuit of the vehicle by controlling the on-off of the auxiliary relay K13 to control the discharging process of the power supply system; by being connected to the low-voltage interface 33 of multiple main quick-change connectors to exchange information with the high-voltage box 12, it can specifically monitor the status of the battery pack 11 in the battery swap box 10 connected to the main high-voltage box 20, and send the charging and discharging control signals 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 being connected to the low-voltage interface 26 of the main high-voltage box , to exchange information with the first external device 200, thereby receiving signals sent by the first external device 200, such as charging control signals, discharging control signals, etc., and controlling at least one charging positive relay K11, at least one charging negative relay K12 and auxiliary relay K13 based on the signals sent by the first external device 200, and performing signal exchange 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, for example, 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, an on-board control terminal, etc.

[0089] As shown in Figure 4, in some embodiments, the main high-voltage box 20 also includes: a main high-voltage acquisition unit 27, which is configured to acquire 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.

[0090] 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 overvoltage fault diagnosis result to the main battery management unit 25. The main battery management unit 25 can control the main DC bus to disconnect based on the overvoltage fault diagnosis result, for example, controlling the end of charging during the charging process or the end of power supply during the power supply process to protect the power supply system. The first main communication bus is the bus for information transmission between modules and can be selected based on actual conditions. The first main communication bus is the bus for information transmission between modules and can be selected based on actual conditions. Figure 4 uses SCAN as the first main communication bus.

[0091] 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 DCAN as the second slave communication bus.

[0092] 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.

[0093] 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] 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.

[0098] This embodiment integrates the battery cell module 111 and the battery monitoring unit 113 into the battery pack 11 to improve monitoring reliability.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] The slave positive DC bus is protected from charging and discharging by the third high-voltage protection module 123 . For example, the third high-voltage protection module 123 is a fuse FU3 . When the current of the slave positive DC bus exceeds a preset current, the fuse FU3 is controlled to disconnect the slave positive DC bus.

[0103] In some embodiments, the third high voltage protection module 123 includes a fuse FU3 and a manual maintenance switch K23 .

[0104] Fuse FU3 disconnects the slave positive DC bus for high-voltage protection when the current on the slave positive DC bus exceeds a preset threshold. Manual maintenance switch K23 can be manually controlled by the operator. For example, in situations requiring circuit maintenance or emergency circuit breaker disconnection, the operator can open manual maintenance switch K23 to disconnect the slave positive DC bus, achieving power outage control. When power restoration is required, the operator closes manual maintenance switch K23 to restore power to the slave positive DC bus.

[0105] In some embodiments, the slave high-voltage box 12 also includes: a slave battery management unit 124, which is respectively connected to the slave positive relay K21 and the slave negative relay K22 to control the on and 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 through the first slave communication bus to interact with the battery pack 11, and is connected to the low-voltage interface 133 of the corresponding slave quick-change connector to interact with the master high-voltage box 20.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] The first slave communication bus is a bus for transmitting information between modules and can be selected based on actual conditions. FIG6 shows SCAN as the first slave communication bus.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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 .

[0114] In some embodiments, the slave high voltage box 12 further includes: a current detection unit 129 configured to detect the slave DC bus current; the slave battery management unit 124 is also connected to the current detection unit 129 to receive the slave DC bus current.

[0115] That is to say, the current detection information on the slave DC bus is obtained through the current detection unit 129, and the current detection information of the slave DC bus is sent 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 current detection information of the slave DC bus, and at the same time, the current detection information of the slave DC bus can be sent to the main high-voltage box 20.

[0116] Therefore, this embodiment integrates the junction box and the control box in the related art into the slave battery management unit 124, thereby improving the system integration and reducing the application cost.

[0117] In some embodiments, 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.

[0118] 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.

[0119] Compared with the technical solution of using heating elements for heat exchange, this embodiment reduces the wiring harness arrangement cost.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] Corresponding to the above embodiments, the present disclosure also proposes a vehicle.

[0124] As shown in FIG7 , a vehicle 1000 according to an embodiment of the present disclosure includes the vehicle power supply system 100 described above.

[0125] 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, and each of the main quick-change connectors is adapted to connect to one of the slave quick-change connectors; Wherein, when the main quick-change connector is connected to the slave quick-change connector, the main high-voltage box and the slave high-voltage box perform information interaction, and transmit the electric energy of the battery pack to the power supply interface of the main high-voltage box or transmit the electric energy of the charging interface of the main high-voltage box to the battery pack.

2. The system according to claim 1, wherein, The main high-voltage box includes: A main positive DC bus, 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, and 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; A main negative DC bus, 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; Wherein, the at least one main power supply positive interface and the at least one main power supply negative interface are adapted to be connected to the main power supply circuit of the vehicle to supply power to the main high-voltage load of the vehicle through the battery pack.

3. The system according to claim 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 the 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, 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 claim 4, wherein The first high-voltage protection module includes a fuse.

6. The system according to any one of claims 2-5, 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.

7. The system according to claim 6, wherein, The second high-voltage protection module includes a fuse and a manual maintenance switch.

8. The system according to claim 4 or 5, wherein The main high-voltage box further includes: The main battery management unit is connected to the at least one charging positive relay, the at least one charging negative relay, and the auxiliary relay respectively, to control the on / off of the at least one charging positive relay, the at least one charging negative relay, and the auxiliary relay, and is connected to the low-voltage interfaces of the multiple main quick-change connectors respectively, 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.

9. The system according to claim 8, 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.

10. The system according to claim 8 or 9, 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.

11. The system according to any one of claims 1-10, 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.

12. The system according to any one of claims 1-11, 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.

13. The system according to claim 12, wherein, The slave high-voltage box further includes: A third high-voltage protection module, and the third high-voltage protection module is connected in series on the slave positive DC bus.

14. The system according to claim 13, wherein, The third high-voltage protection module includes a fuse and a manual maintenance switch.

15. The system according to any one of claims 12 - 14, wherein, 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 on / off of 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.

16. The system according to claim 15, wherein, The slave high-voltage box further includes: The slave high-voltage acquisition unit is configured to acquire the 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.

17. The system according to claim 15 or 16, wherein, The slave high-voltage box further includes: A slave wireless communication unit, and 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, and 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, and 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.

18. The system according to any one of claims 15 - 17, wherein, The slave high-voltage box further includes: A current detection unit configured to detect the DC bus current; The slave battery management unit is also connected to the current detection unit to receive the DC bus current.

19. The system according to any one of claims 1-18, wherein, Each of the battery swapping boxes further includes: A water-cooled heat exchange component, which is adapted to be connected to an external water-cooled device through the water-cooled interface of the battery swapping box and is configured to exchange heat for the battery swapping box based on hot water or cold water provided by the external water-cooled device.

20. A vehicle, comprising the vehicle power supply system according to any one of claims 1-19.

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