High-voltage distribution box and electric equipment

Abstract

This application relates to the field of power distribution equipment technology and provides a high-voltage distribution box and electrical equipment. The high-voltage distribution box of this application includes a housing, and a power distribution circuit and a BMS component disposed within the housing for connection to external modules. The power distribution circuit includes a common node, an output circuit, a charging circuit, and a power supply circuit. At least one of the power supply circuit, output circuit, and charging circuit has multiple branches connected in parallel between the common node and the corresponding external module, and the BMS component is connected to the multiple branches via sampling harnesses. The high-voltage distribution box of this application, through the arrangement of multiple parallel branches in the power distribution circuit, ensures that when one branch fails, the other branches can still operate normally, maintaining the normal operation of the power distribution circuit for a short period. Simultaneously, the BMS component can monitor the operating status of each branch to facilitate subsequent maintenance work, thereby improving the reliability of the power distribution circuit.

Description

Technical Field

[0001] This application relates to the field of power distribution equipment technology, and in particular to a high-voltage distribution box and power equipment. Background Technology

[0002] With the rapid development of new energy vehicles and energy storage equipment, high-voltage distribution units (PDUs), as core components for power transmission and distribution, directly affect the safety and reliability of the system. Traditional high-voltage distribution unit circuit designs have many limitations. Most traditional PDUs use a single-branch design, connecting only a single branch to external modules such as power sources, loads, and charging equipment. However, this single-circuit design suffers from poor reliability; if a circuit fails, the charging and discharging functions of the entire PDU will fail, making it unsuitable for applications requiring high power supply continuity. Utility Model Content

[0003] In view of this, this application aims to provide a high-voltage distribution box that improves the reliability of power distribution circuits.

[0004] To achieve the above objectives, the technical solution of this application is implemented as follows:

[0005] A high-voltage distribution box includes a housing, and a power distribution circuit and a BMS component disposed in the housing for connection with an external module;

[0006] The power distribution circuit includes a common node, and an output circuit, a charging circuit, and a power supply circuit connected at one end to the common node;

[0007] The external module includes a load module connected to the other end of the output circuit, a charging module connected to the other end of the charging circuit, and a power module connected to the other end of the power supply circuit.

[0008] In the power supply circuit, the output circuit, and the charging circuit, at least one of them has multiple branches connected in parallel between the common node and the corresponding external module, and the BMS component is connected to the multiple branches via a sampling harness.

[0009] Furthermore, the common node includes a positive copper busbar assembly and a negative copper busbar assembly; the output circuit includes a positive output circuit and a negative output circuit; the charging circuit includes a positive charging circuit and a negative charging circuit; the power supply circuit includes a positive power supply circuit and a negative power supply circuit; the positive copper busbar assembly is connected to the positive output circuit, the positive charging circuit, and the positive power supply circuit respectively, and the negative copper busbar assembly is connected to the negative output circuit, the negative charging circuit, and the negative power supply circuit respectively.

[0010] Furthermore, both the positive output circuit and the negative output circuit include a main relay connected to the corresponding common node, and multiple output branches connected in parallel between the main relay and the load module; each output branch includes an output connector connected to the main relay, the output connector being disposed on the housing and used to connect the load module; in the positive output circuit, a main fuse is also connected in series on the output branch.

[0011] Furthermore, the positive output circuit also includes a first pre-charge circuit; the first pre-charge circuit includes a pre-charge resistor and a first pre-charge relay connected in series, and the pre-charge resistor and the pre-charge relay are respectively connected to the two ends of the main relay.

[0012] Furthermore, both the positive charging circuit and the negative charging circuit include multiple charging branches connected in parallel between the corresponding common node and the charging module; each charging branch includes a charging connector disposed on the housing and used to connect the charging module, and a charging relay connected between the charging connector and the common node; in the positive charging circuit, a main fuse is also connected in series on the charging branch.

[0013] Furthermore, both the positive and negative power supply circuits include multiple power connectors connected to the corresponding common node; the power connectors are used to connect the power module and are disposed on the housing; in the negative power supply circuit, each power connector is connected to the negative copper busbar assembly via an overcurrent assembly, and the housing is also provided with multiple current sensors corresponding to each overcurrent assembly; the current sensors are used to measure the current of the corresponding overcurrent assembly and are communicatively connected to the BMS assembly through the sampling harness.

[0014] Furthermore, an insulator is provided on the inner wall of the housing, and the positive copper busbar assembly and the negative copper busbar assembly are both located on top of the insulator; a heat dissipation structure is attached to both the positive copper busbar assembly and the negative copper busbar assembly, and the heat dissipation structure has multiple outwardly extending fins.

[0015] Furthermore, the power distribution circuit also includes a thermal management circuit; the thermal management circuit includes a thermal management connector connected between the positive copper busbar assembly and the negative copper busbar assembly, and a thermal management relay and a thermal management fuse connected in series between the thermal management connector and the positive copper busbar assembly; and / or, the power distribution circuit also includes an air conditioning circuit; the air conditioning circuit includes an air conditioning connector connected between the positive copper busbar assembly and the negative copper busbar assembly, an air conditioning relay and an air conditioning fuse connected in series between the air conditioning connector and the positive copper busbar assembly, and a second pre-charge circuit connected in parallel with the air conditioning relay; the second pre-charge circuit includes a second pre-charge relay and a second pre-charge resistor connected in series, and a capacitor is connected between the two terminals of the air conditioning relay.

[0016] Furthermore, the housing includes a housing body with an open top and a top cover covering the top of the housing body; sealing foam is sandwiched between the housing body and the top cover, and a one-way valve is provided on the housing body for the gas inside the housing to be discharged.

[0017] Compared with related technologies, this application has the following advantages:

[0018] (1) The high-voltage distribution box described in this application forms a redundancy backup in the power distribution circuit by setting at least one of the power supply circuit, output circuit and charging circuit having multiple parallel branches. When a branch fails, the other branches can still work normally to maintain the normal operation of the power distribution circuit for a short period of time. At the same time, the BMS component can monitor the working status of each branch and identify the faulty branch to facilitate subsequent maintenance work, thereby improving the reliability of the power distribution circuit and ensuring the continuous operation of the high-voltage distribution box.

[0019] (2) By using positive and negative copper busbar assemblies as common nodes, physical isolation between the positive and negative circuits is achieved. At the same time, the copper busbar assembly, as a common node, has good current carrying capacity and can effectively carry the current from each branch. Furthermore, as a rigid electrical connection structure, the copper busbar can improve the connection effect between circuits to a certain extent.

[0020] (3) The main relay in the output circuit enables on / off control of the output circuit, thus providing protection in case of load module failure. Simultaneously, the multiple output connectors in multiple output branches allow connection of multiple load modules, enabling multi-load output functionality. Furthermore, the main fuse located in the positive output circuit can disconnect the load module from the positive output circuit in case of overload, improving the overall safety of the output circuit.

[0021] (4) By setting the first pre-charging circuit, when the load module is started, the pre-charging resistor can be used to limit the current flowing to the load module, so as to avoid the impact of instantaneous large current on the load module.

[0022] (5) The charging relay in the charging circuit enables on / off control of the charging circuit. The parallel charging branches in the charging circuit distribute the charging current, reducing the current load on individual charging branches, decreasing heat generation during charging, and improving charging efficiency and system reliability. The main fuse on the positive charging branch ensures the safety of the entire charging circuit.

[0023] (6) By setting up parallel connections of multiple power connectors, multiple power branches are formed, which is conducive to realizing the function of multiple power inputs. At the same time, by setting up overcurrent components and current sensors, the BMS component can collect current information on the power circuit and realize the monitoring of the overall working status of the high-voltage distribution box.

[0024] (7) The insulators provide electrical isolation between the housing and each copper busbar assembly, preventing leakage and short circuits caused by contact between the power distribution circuit and the housing, thus improving safety. At the same time, the heat dissipation structure improves the heat dissipation effect of the copper busbar assembly, further reducing the heat generated by the copper busbar assembly and the entire power distribution circuit.

[0025] (8) By setting up the thermal management circuit, a power interface can be provided for the thermal management system to ensure the normal operation of the thermal management system. By setting up the air conditioning circuit, a high-voltage power interface can be provided for the air conditioning system to support the normal operation of the air conditioning system and meet the needs of the vehicle interior environment regulation.

[0026] (9) The combination of the housing body and the top cover facilitates the assembly and maintenance of the power distribution circuit. At the same time, the rice foam can maintain the sealing of the housing. When the gas pressure inside the housing rises due to the heat generated by the circuit, the excess gas can be discharged through the one-way valve, and external gas or liquid can be prevented from entering the housing.

[0027] This application also proposes an electrical appliance having a high-voltage distribution box as described above.

[0028] The electrical equipment and / or high-voltage distribution box described in this application have the same technical effects as related technologies, and will not be described in detail here. Attached Figure Description

[0029] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0030] Figure 1 This is a schematic diagram of the high-voltage distribution box described in the embodiments of this application;

[0031] Figure 2 This is a schematic diagram of the internal structure of the high-voltage distribution box described in the embodiments of this application;

[0032] Figure 3 This is a schematic diagram of the power distribution circuit described in the embodiments of this application;

[0033] Figure 4 This is a schematic diagram of the positive electrode circuit described in the embodiments of this application;

[0034] Figure 5 This is a schematic diagram of the negative electrode circuit described in the embodiments of this application;

[0035] Figure 6 This is a schematic diagram of the thermal management circuit and air conditioning circuit described in the embodiments of this application;

[0036] Explanation of reference numerals in the attached figures:

[0037] 1. Housing; 101. Housing body; 102. Top cover; 103. Sealing foam; 104. Heat dissipation structure; 105. One-way valve;

[0038] 2. Positive electrode copper busbar assembly; 201. First positive electrode copper busbar; 202. Second positive electrode copper busbar;

[0039] 3. Negative electrode copper busbar assembly; 301. First negative electrode copper busbar; 302. Second negative electrode copper busbar; 303. Third negative electrode copper busbar;

[0040] 4a. Positive output circuit; 4b. Negative output circuit;

[0041] 401, Main relay; 402a, Positive output connector; 402b, Negative output connector; 403, First connecting copper busbar; 404, Second connecting copper busbar; 405, Third connecting copper busbar; 407, First pre-charge resistor; 408, First pre-charge relay;

[0042] 5a. Positive charging circuit; 5b. Negative charging circuit;

[0043] 501, Charging relay; 502a, Positive charging connector; 502b, Negative charging connector; 503, Fourth connecting copper busbar; 504, Fifth connecting copper busbar; 505, Sixth connecting copper busbar;

[0044] 6a. Positive power supply circuit; 6b. Negative power supply circuit;

[0045] 601a Positive power connector; 601b Negative power connector; 602 Overcurrent assembly; 603 Current sensor; 604 Manual maintenance switch;

[0046] 7. Thermal management circuit; 701. Thermal management connector; 702. Thermal management relay; 703. Thermal management fuse;

[0047] 8. Air conditioning circuit; 801. Air conditioning connector; 802. Air conditioning relay; 803. Air conditioning fuse; 804. Second pre-charge relay; 805. Second pre-charge resistor; 806. Capacitor;

[0048] 9. BMS assembly; 901. Sampling harness; 902. Bracket;

[0049] 10. Main fuse. Detailed Implementation

[0050] To make the technical solution and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0051] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0052] Furthermore, it should be noted that in the description of this application, if terms such as "upper," "lower," "inner," or "outer" appear, indicating orientation or positional relationship, these are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, if terms such as "first" or "second" appear, they are also used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] Furthermore, in the description of this application, unless otherwise expressly defined, the terms "installation," "connection," "joining," and "connector" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application in light of the specific circumstances.

[0054] In this application, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0055] The present application will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0056] An embodiment of the first aspect of this application provides a high-voltage distribution box.

[0057] In related technologies, traditional high-voltage distribution boxes typically use only a single branch to connect external modules such as power supply, load, and charging equipment. If a circuit failure occurs, it will directly cause the charging and discharging functions of the entire high-voltage distribution box to fail, which cannot meet the application scenarios with high power supply continuity, thus resulting in poor reliability.

[0058] In view of this, in order to overcome the shortcomings of related technologies, the high-voltage distribution box in this embodiment combines... Figure 1 , Figure 2 and Figure 3 As shown, the overall design includes a housing 1, and a power distribution circuit and BMS component 9 disposed in the housing 1 for connecting to external modules.

[0059] The power distribution circuit includes a common node, and an output circuit, a charging circuit, and a power supply circuit connected to the common node at one end. The external modules include a load module connected to the other end of the output circuit, a charging module connected to the other end of the charging circuit, and a power supply module connected to the other end of the power supply circuit.

[0060] In the power supply circuit, output circuit, and charging circuit, at least one of them has multiple branches connected in parallel between the common node and the corresponding external module, and the BMS component 9 is connected to the multiple branches through the sampling harness 901.

[0061] Therefore, by setting at least one of the power supply circuit, output circuit, and charging circuit to have multiple parallel branches, redundancy is formed in the power distribution circuit. When one branch fails, the other branches can still work normally to maintain the normal operation of the power distribution circuit for a short period of time. At the same time, the BMS component 9 can monitor the working status of each branch and identify the faulty branch to facilitate subsequent maintenance work, thereby improving the reliability of the power distribution circuit and ensuring the continuous operation of the high-voltage distribution box.

[0062] Based on the above overview, specifically in this embodiment, the charging module is a charging device that can supply power to the power module through a high-voltage distribution box. Furthermore, the power module is a power battery, and the load module is a drive motor or other high-power electrical equipment. In addition, the BMS component 9 in this embodiment includes two BMS main boards stacked in the height direction, and a bracket 902 disposed on the inner wall of the housing 1. One BMS main board is covered and secured below the bracket 902, while the other BMS main board is mounted on top of the bracket 902.

[0063] In some of the exemplary implementations, combined with Figure 3 As shown, the common node includes a positive copper busbar assembly 2 and a negative copper busbar assembly 3. The output circuit includes a positive output circuit 4a and a negative output circuit 4b, the charging circuit includes a positive charging circuit 5a and a negative charging circuit 5b, and the power supply circuit includes a positive power supply circuit 6a and a negative power supply circuit 6b.

[0064] At the same time, combined Figure 4 As shown, the positive copper busbar assembly 2 is connected to the positive output circuit 4a, the positive charging circuit 5a, and the positive power supply circuit 6a, respectively, thus forming a positive circuit. Furthermore, combined with... Figure 5 As shown, the negative copper busbar assembly 3 is connected to the negative output circuit 4b, the negative charging circuit 5b and the negative power supply circuit 6b respectively, thus forming a negative circuit.

[0065] Therefore, by using positive and negative copper busbar assemblies as common nodes, physical isolation between the positive and negative circuits is achieved. Simultaneously, the copper busbar assembly, as a common node, has good current-carrying capacity and can effectively carry the current from each branch. Furthermore, as a rigid electrical connection structure, the copper busbar can improve the connection effect between circuits to a certain extent.

[0066] In a specific implementation, the positive copper busbar assembly 2 includes a first positive copper busbar 201 connecting the positive output circuit 4a and the positive charging circuit 5a, and a second positive copper busbar 202 connecting the positive power supply circuit 6a. One end of the first, second, and third positive copper busbars is connected together, serving as the aforementioned common node.

[0067] Meanwhile, the negative copper busbar assembly 3 includes a first negative copper busbar 301 connected to the positive output circuit 4a, a second negative copper busbar 302 connected to the negative charging circuit 5b, and a third negative copper busbar 303 connected to the positive power supply circuit 6a. One end of the first, second, and third negative copper busbars 303 are connected together, serving as another common node as described above.

[0068] In some exemplary embodiments, both the positive output circuit 4a and the negative output circuit 4b include a main relay 401 connected to a corresponding common node, and multiple output branches connected in parallel between the main relay 401 and the load module. Each output branch includes an output connector connected to the main relay 401, which is mounted on the housing 1 and used to connect to the load module. In the positive output circuit 4a, a main fuse 10 is also connected in series on the output branch.

[0069] The main relay 401 in the output circuit enables on / off control of the output circuit, thus providing circuit control and protection in case of load module failure. Simultaneously, the multiple output connectors in the multiple output branches allow connection to multiple load modules, achieving multi-load output functionality and preventing circuit output interruptions due to power module failure, thereby further improving the reliability of the power distribution circuit.

[0070] Furthermore, the main fuse 10 is installed in the positive output circuit 4a, which can disconnect the load module from the positive output circuit 4a when the output circuit is overloaded, ensuring that there is no voltage from the power module at both ends of the load module, thereby achieving a protection effect and improving the safety of the entire output circuit.

[0071] In a specific implementation, the output branch includes a positive output branch and a negative output branch respectively located in the positive output circuit 4a and the negative output circuit 4b, and the output connector includes a positive output connector 402a and a negative output connector 402b respectively located in the positive output branch and the negative output branch.

[0072] In the positive output circuit 4a, a first connecting copper busbar 403 is provided between the main relay 401 and the positive output branch, and the positive output connector 402a is connected to the main fuse 10 through a second connecting copper busbar 404. In the negative output circuit 4b, a third connecting copper busbar 405 is provided between the main relay 401 and the negative output connector 402b, and the end of the third connecting copper busbar 405 forms a transverse portion, which simultaneously connects to two negative output copper busbars to form two negative output branches.

[0073] In some exemplary embodiments, the positive output circuit 4a further includes a first pre-charge circuit. The first pre-charge circuit includes a pre-charge resistor and a first pre-charge relay 408 connected in series, with the pre-charge resistor and pre-charge relay respectively connected to the two ends of the main relay 401.

[0074] By setting the first pre-charging circuit, when the power distribution circuit is in the working state of discharging to the load module, the first pre-charging relay 408 is turned on first. The pre-charging resistor limits the current flowing to the load module, thereby pre-charging the capacitor 806 in the load module. When the pre-charging process ends, the first pre-charging relay 408 can cut off the pre-charging circuit. At the same time, the main relay 401 connects the output circuit to ensure that the power distribution circuit continues to discharge to the load module. This avoids the impact of a large instantaneous current on the load module when the output circuit is turned on.

[0075] In practice, the two ends of the first pre-charging circuit are connected to the first connecting copper busbar 403 and the first copper busbar, respectively.

[0076] In some exemplary embodiments, both the positive charging circuit 5a and the negative charging circuit 5b include multiple charging branches connected in parallel between their respective common nodes and the charging module. Each charging branch includes a charging connector mounted on the housing 1 for connecting to the charging module, and a charging relay 501 connected between the charging connector and the common node. In the positive charging circuit 5a, a main fuse 10 is also connected in series on the charging branch.

[0077] The charging relay 501 in the charging circuit enables on / off control of the charging circuit. The parallel charging branches in the charging circuit distribute the charging current, reducing the current load on individual charging branches, decreasing heat generation during charging, and improving charging efficiency and system reliability. The main fuse 10 on the positive charging branch ensures the safety of the entire charging circuit.

[0078] In practical implementation, the charging branch includes a positive charging branch and a negative charging branch, and the charging connectors include a positive charging connector 502a and a negative charging connector 502b. The positive charging connector 502a in the positive charging branch is connected to the charging relay 501 bracket 902 via a fourth connecting copper busbar 503, which simultaneously connects both positive charging connectors 502a. The charging relay 501 is connected to the main fuse 10 via a fifth connecting copper busbar 504. The negative charging connector 502b in the negative charging branch is connected to the charging relay 501 bracket 902 via a sixth connecting copper busbar 505, which simultaneously connects both negative charging connectors 502b.

[0079] In some exemplary embodiments, both the positive power supply circuit 6a and the negative power supply circuit 6b include multiple power connectors connected to corresponding common nodes. The power connectors are used to connect the power supply module and are located on the housing 1.

[0080] In the negative power supply circuit 6b, each power connector is connected to an overcurrent assembly 602 between itself and the negative copper busbar assembly 3. The housing 1 also contains multiple current sensors 603, each corresponding to one of the overcurrent assemblies 602. The current sensors 603 measure the current of the corresponding overcurrent assembly 602 and are communicatively connected to the BMS assembly 9 via a sampling harness 901.

[0081] By connecting multiple power connectors in parallel, multiple power branches are formed, which facilitates the realization of multiple power input functions. At the same time, the inclusion of overcurrent component 602 and current sensor 603 enables the BMS component to collect current information on the power circuit, thereby monitoring the overall operating status of the high-voltage distribution box.

[0082] In a specific implementation, the power connector includes a positive power connector 601a and a negative power connector 601b. In the positive power circuit 6a, the positive connector is connected to the second positive copper busbar 202, and a manual maintenance switch 604 is connected in series on the second positive copper busbar 202. The manual maintenance switch 604 can be operated to disconnect the connection between the second positive copper busbar 202 and the power module.

[0083] In addition, the current sensor 603 is a Hall current sensor 603, which is mounted on the overcurrent assembly 602 and connected to the BMS assembly 9.

[0084] In some exemplary embodiments, insulators are provided on the inner wall of the housing 1, and the positive copper busbar assembly 2 and the negative copper busbar assembly 3 are both located on top of the insulators. A heat dissipation structure 104 is attached to both the positive and negative copper busbar assemblies 2 and 3, and the heat dissipation structure 104 has multiple outwardly extending fins. The insulators provide electrical isolation between the housing 1 and each copper busbar assembly, preventing leakage or short circuits caused by contact between the power distribution circuit and the housing 1, thus improving safety. Simultaneously, the heat dissipation structure 104 improves the heat dissipation effect of the copper busbar assemblies, further reducing the heat generated by the copper busbar assemblies and the entire power distribution circuit.

[0085] In practice, heat dissipation structures 104 are also provided on the first, third, and fifth connecting copper busbars 504.

[0086] In some of the exemplary implementations, combined with Figure 3 and Figure 6As shown, the power distribution circuit also includes a thermal management circuit 7. The thermal management circuit 7 includes a thermal management connector 701 connected between the positive copper busbar assembly 2 and the negative copper busbar assembly 3, and a thermal management relay 702 and a thermal management fuse 703 connected in series between the thermal management connector 701 and the positive copper busbar assembly 2.

[0087] Meanwhile, the power distribution circuit also includes an air conditioning circuit 8. The air conditioning circuit 8 includes an air conditioning connector 801 connected between the positive copper busbar assembly 2 and the negative copper busbar assembly 3; an air conditioning relay 802 and an air conditioning fuse 803 connected in series between the air conditioning connector 801 and the positive copper busbar assembly 2; and a second pre-charging circuit connected in parallel with the air conditioning relay 802. The second pre-charging circuit includes a second pre-charging relay 804 and a second pre-charging resistor 805 connected in series, and a capacitor 806 is connected between the two terminals of the air conditioning relay 802.

[0088] The thermal management circuit 7 provides a power interface for the thermal management system to ensure its normal operation. The air conditioning circuit 8 provides a high-voltage power interface for the air conditioning system to support its normal operation and meet the needs of the vehicle's interior environment.

[0089] In some exemplary embodiments, the housing 1 includes a housing body 101 with an open top and a top cover 102 covering the top of the housing body 101. Sealing foam 103 is sandwiched between the housing body 101 and the top cover 102, and a one-way valve 105 is provided on the housing body 101 to allow gas to escape from the housing 1. The mating arrangement of the housing body 101 and the top cover 102 facilitates the assembly and maintenance of the electrical circuit. Simultaneously, the sealing foam maintains the airtightness of the housing 1. When the gas pressure inside the housing 1 increases due to heat generated by the circuit, the one-way valve can expel excess gas and prevent external gas or liquid from entering the housing 1.

[0090] It is worth noting that all the aforementioned relays are controlled by BMS component 9. Furthermore, in this embodiment, in the output circuit and charging circuit, the main relay 401 is an HF600A relay, the main fuse 10 is an RS309-MF-EV_700-900_A fuse, and the charging relay 501 is an HFE82V-400A relay.

[0091] In the first and second pre-charging circuits, the first pre-charging resistor 407 is an EVR-C44804A.0-100R-J 200W pre-charging resistor, and the second pre-charging resistor 805 is a JEIL 40W-60W pre-charging resistor. Both the first and second pre-charging relays 804 are HFE82V-40 relays. In the thermal management circuit 7, the thermal management fuse 703 is an EV88-750-_250-400A fuse, and the thermal management relay 702 is an HFE82V-150B-HC5 relay. In the air conditioning circuit 8, the air conditioning relay 802 is an HFE82V-100D relay, and the air conditioning fuse 803 is an EV88-_6-100A fuse. The capacitor 806 is a CPA1X107J031A 1X capacitor 806. Of course, depending on the actual parameters and design of the high-voltage distribution box, other models of the electrical components mentioned above can be used to meet the working requirements of the power distribution circuit.

[0092] The high-voltage distribution box in this embodiment adopts the above design. By setting multiple parallel branches in the power distribution circuit, redundancy is formed. When a branch fails, the other branches can still work normally to maintain the normal operation of the power distribution circuit for a short period of time. At the same time, the BMS component 9 can monitor the working status of each branch and identify the faulty branch to facilitate subsequent maintenance work, thereby improving the reliability of the power distribution circuit and ensuring the continuous operation of the high-voltage distribution box.

[0093] An embodiment of the second aspect of this application provides an electrical appliance having a high-voltage distribution box as described above.

[0094] The electrical equipment in this embodiment includes new energy vehicles, energy storage devices, etc., which have large-capacity, high-power power batteries and high-energy-consuming load devices.

[0095] The electrical equipment in this embodiment, through the installation of the high-voltage distribution box, has good reliability and can ensure the continuous operation of the electrical equipment.

[0096] The above descriptions are merely some embodiments of this application and are not intended to limit this application. The technical features or structures in the foregoing different embodiments can be arbitrarily combined to form other specific technical solutions as needed. For those skilled in the art, this application can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of the claims of this application.

Claims

1. A high-voltage distribution box, characterized in that: Includes a housing, and a power distribution circuit and BMS component disposed within the housing for connection with an external module; The power distribution circuit includes a common node, and an output circuit, a charging circuit, and a power supply circuit connected at one end to the common node; The external module includes a load module connected to the other end of the output circuit, a charging module connected to the other end of the charging circuit, and a power module connected to the other end of the power supply circuit. In the power supply circuit, the output circuit, and the charging circuit, at least one of them has multiple branches connected in parallel between the common node and the corresponding external module, and the BMS component is connected to the multiple branches via a sampling harness.

2. The high-voltage distribution box according to claim 1, characterized in that: The common node includes a positive copper busbar assembly and a negative copper busbar assembly; The output circuit includes a positive output circuit and a negative output circuit, the charging circuit includes a positive charging circuit and a negative charging circuit, and the power supply circuit includes a positive power supply circuit and a negative power supply circuit. The positive copper busbar assembly is connected to the positive output circuit, the positive charging circuit, and the positive power supply circuit, respectively, and the negative copper busbar assembly is connected to the negative output circuit, the negative charging circuit, and the negative power supply circuit, respectively.

3. The high-voltage distribution box according to claim 2, characterized in that: Both the positive output circuit and the negative output circuit include a main relay connected to the corresponding common node, and multiple output branches connected in parallel between the main relay and the load module; The output branch includes an output connector that connects to the main relay. The output connector is located on the housing and is used to connect to the load module. In the positive output circuit, a main fuse is also connected in series on the output branch.

4. The high-voltage distribution box according to claim 3, characterized in that: The positive output circuit also includes a first pre-charge circuit; The first pre-charge circuit includes a pre-charge resistor and a first pre-charge relay connected in series, and the pre-charge resistor and the pre-charge relay are respectively connected to the two ends of the main relay.

5. The high-voltage distribution box according to claim 2, characterized in that: Both the positive charging circuit and the negative charging circuit include multiple charging branches connected in parallel between the corresponding common node and the charging module. The charging branch includes a charging connector disposed on the housing and used to connect the charging module, and a charging relay connected between the charging connector and the common node; In the positive charging circuit, a main fuse is also connected in series on the charging branch.

6. The high-voltage distribution box according to claim 2, characterized in that: Both the positive power supply circuit and the negative power supply circuit include multiple power connectors connected to the corresponding common node. The power connector is used to connect the power module and is located on the housing; In the negative power supply circuit, each power connector is connected to the negative copper busbar assembly, and the housing is also provided with a plurality of current sensors corresponding to each of the overcurrent components. The current sensor is used to measure the current corresponding to the overcurrent component and is communicatively connected to the BMS component through the sampling harness.

7. The high-voltage distribution box according to claim 2, characterized in that: An insulator is provided on the inner wall of the housing, and the positive copper busbar assembly and the negative copper busbar assembly are both located on top of the insulator; Both the positive electrode copper busbar assembly and the negative electrode copper busbar assembly are fitted with heat dissipation structures, which have multiple outwardly extending fins.

8. The high-voltage distribution box according to claim 2, characterized in that: The power distribution circuit also includes a thermal management circuit; The thermal management circuit includes a thermal management connector connected between the positive copper busbar assembly and the negative copper busbar assembly, and a thermal management relay and a thermal management fuse connected in series between the thermal management connector and the positive copper busbar assembly. And / or, the power distribution circuit also includes an air conditioning circuit; The air conditioning circuit includes an air conditioning connector connected between the positive copper busbar assembly and the negative copper busbar assembly, an air conditioning relay and an air conditioning fuse connected in series between the air conditioning connector and the positive copper busbar assembly, and a second pre-charging circuit connected in parallel with the air conditioning relay. The second pre-charging circuit includes a second pre-charging relay and a second pre-charging resistor connected in series, and a capacitor is connected between the two terminals of the air conditioning relay.

9. The high-voltage distribution box according to any one of claims 1 to 8, characterized in that: The housing includes a housing body with an open top and a top cover that seals the top of the housing body; A sealing foam is sandwiched between the housing body and the top cover, and a one-way valve is provided on the housing body to allow gas inside the housing to be discharged.

10. An electrical appliance, characterized in that: The electrical equipment has a high-voltage distribution box as described in any one of claims 1 to 9.

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