A battery pack power distribution unit

Abstract

A battery pack power distribution unit, relating to the field of power battery technology, is used to solve the problems of long R&D design cycles and high repair costs when BDU assemblies are damaged due to low compatibility. The battery pack power distribution unit includes a mounting plate, a connection plate, and components. The connection plate includes independent module main positive connection plate, module main negative connection plate, discharge positive connection plate, and discharge negative connection plate, which are respectively disposed on both sides of the mounting plate along its width. Components are disposed on one side of the mounting plate and include a main fuse, a heating fuse, a shunt, a pre-charge resistor, a pre-charge relay, a heating relay, a main positive relay, a fast-charge relay, and a main negative relay. The module main positive connection plate, main fuse, main positive relay, and discharge positive connection plate are electrically connected, and the discharge negative connection plate, main negative relay, and module main negative connection plate are electrically connected sequentially.

Description

Technical Field

[0001] This application relates to the field of power battery technology, and in particular to a battery pack power distribution unit. Background Technology

[0002] To ensure the smooth operation of the battery system's charging and discharging, a battery pack circuit breaker unit, such as relays and fuses, is required. To facilitate the assembly of these components, an integrated battery distribution unit (BDU) assembly is used, and the BDU is then directly connected to the battery pack via a junction box.

[0003] However, on the one hand, the current battery pack BDU shell needs to be designed independently. Each different model, function, and circuit power amplifier requires a different BDU design, resulting in resource waste, high development costs, and long product development cycles. On the other hand, the BDU assembly is an integrated component. When internal components such as a single relay unit stick together or a fuse blows, it is difficult to repair. The usual solution is to directly replace the entire BDU assembly, which results in high repair costs. Utility Model Content

[0004] This application provides a battery pack power distribution unit to solve the above-mentioned problems.

[0005] This application provides a battery pack power distribution unit, including a mounting plate, a terminal board, and components. The terminal board includes mutually independent module main positive terminal board, module main negative terminal board, discharge positive terminal board, and discharge negative terminal board, which are respectively disposed on both sides of the mounting plate along the width direction of the mounting plate. The components are disposed on one side of the mounting plate and include a main fuse, a heating fuse, a shunt, a pre-charge resistor, a pre-charge relay, and a heating relay. The circuit consists of a main positive relay, a fast charging relay, and a main negative relay. The module's main positive terminal board, main fuse, main positive relay, and discharge positive terminal board are connected in sequence. The discharge negative terminal board, main negative relay, and module main negative terminal board are connected in sequence. The module main positive terminal board, pre-charge relay, pre-charge resistor, and discharge positive terminal board are connected in sequence. The module main positive terminal board, fast charging relay, and the positive terminal of the fast charging interface are connected in sequence. The module main positive terminal board, heating relay, heating fuse, and the positive terminal of the heating equipment are connected in sequence.

[0006] In this application, the junction board and various components are directly mounted on the mounting plate. The position of each component is fixed by the board, which can achieve the effect of pre-installation of the circuit breaker unit. By scattering the various components on the mounting plate, the integration of components can be avoided, so that when a component is damaged, it can be directly replaced and repaired, reducing maintenance costs.

[0007] The battery pack module does not require space to be reserved for the BDU housing. Compared with existing integrated solutions, this solution uses less space, allowing more space to be used for the layout of the battery pack or other components, which helps to improve the energy density of the battery pack or accommodate more auxiliary equipment.

[0008] When designing circuit breaker units, the model and type of components can be directly adjusted according to the function, and components can be directly replaced without setting up an independent module housing, which reduces the research and development and manufacturing cycle and improves the universality and adaptability of the circuit breaker unit.

[0009] Meanwhile, the aforementioned connection relationships between the components in this solution can be directly arranged on the mounting plate. Through the above circuit arrangement, various functions of the traditional integrated BDU unit can be realized, avoiding functional degradation. The components in this solution are directly mounted on the same side of the mounting plate, making circuit arrangement more convenient compared to the traditional structure.

[0010] In some embodiments of this application, the main positive relay and the discharge positive terminal are electrically connected to the external circuit, and the main positive relay is used to control the connection and disconnection between the positive terminal of the battery and the external circuit; the main negative relay and the discharge negative terminal are electrically connected to the external circuit, and are used to control the connection and disconnection between the negative terminal of the battery and the external circuit.

[0011] The connection structure between the discharge positive terminal board, the discharge negative terminal board, and the external circuit facilitates the electrical connection wiring between the external circuit and the battery module. At the same time, the connection between this part and the external circuit can realize the function of controlling the current on and off of the external circuit through the main positive relay and the main negative relay.

[0012] In some embodiments of this application, the module main positive terminal board is used to connect to the positive terminal of the battery module; the module main negative terminal board is used to connect to the negative terminal of the battery module. The connection between the module main positive terminal board, the module main negative terminal board and the battery module enables the battery pack power distribution unit provided in this application to realize the power supply and de-energization of the battery module through wiring.

[0013] In some embodiments of this application, the mounting plate includes a first part and a second part distributed along the length direction, and the components in the first part and the second part are electrically connected through a junction box; the main fuse, heating fuse, pre-charge resistor, pre-charge relay and heating relay are disposed on the first part; the main positive relay, fast charging relay, main negative relay and shunt are disposed on the second part.

[0014] The components are installed on the first and second parts respectively, which facilitates reasonable layout, easy installation and arrangement of circuits, and the connection of the power board can stabilize the current.

[0015] In some embodiments of this application, the heating fuse is disposed on the side of the first part closer to the second part; the main fuse, pre-charge resistor, pre-charge relay, and heating relay are disposed on one side of the heating fuse. The placement of the main fuse, pre-charge resistor, pre-charge relay, and heating relay facilitates the arrangement of circuitry on the heating fuse.

[0016] In some embodiments of this application, the main fuse, pre-charge resistor, and pre-charge relay are spaced apart along the width of the mounting plate, and the heating relay is disposed between the pre-charge relay and the heating fuse. The distribution of the main fuse, pre-charge resistor, pre-charge relay, and heating relay facilitates the electrical connection of the components at the first part.

[0017] In some embodiments of this application, along the length of the mounting plate and in the direction from the first part to the second part, the main positive relay, the fast charging relay, and the main negative relay are distributed at intervals in sequence, and the shunt and the main negative relay are distributed at intervals along the width of the mounting plate.

[0018] The positions of the main positive relay, fast charging relay, main negative relay, and shunt facilitate the electrical connection of the components in the second part.

[0019] In some embodiments of this application, the mounting plate is further provided with multiple fixing holes, and the battery pack power distribution unit is further provided with multiple first threaded parts. The multiple first threaded parts are provided in a one-to-one correspondence with the multiple fixing holes, and multiple components are respectively provided at the multiple fixing holes. The first threaded parts pass through the components and are fixedly connected to the corresponding fixing holes so that the components are relatively fixed to the mounting plate.

[0020] The fixing hole and the first threaded part facilitate the fixed connection between the component and the mounting plate, making the component position stable and the connection relationship stable.

[0021] In some embodiments of this application, multiple mounting holes are formed at the two width edges of the mounting plate, and the battery pack power distribution unit also includes multiple second threaded parts, which are respectively arranged in correspondence with the multiple mounting holes. The mounting plate is used to fit against the inner wall of the battery pack, and the second threaded parts pass through the corresponding mounting holes and are fixedly connected to the battery pack.

[0022] The mounting holes and second threaded parts enable the battery pack power distribution unit of this application to be fixedly installed in a designated area within the battery pack, which helps to stabilize the wiring connection between the components and the battery cells within the power distribution unit. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the technical solution of this utility model and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solution of this utility model and do not constitute a limitation on the technical solution of this utility model.

[0024] Figure 1 This is a schematic diagram of a battery pack power distribution unit provided in an embodiment of this application.

[0025] Reference numerals: 1-Mounting plate; 11-First part; 12-Second part; 13-Fixing hole; 14-First threaded part; 15-Mounting hole; 2-Connector board; 21-Module main positive connector board; 22-Module main negative connector board; 23-Discharge positive connector board; 24-Discharge negative connector board; 3-Components; 31-Main fuse; 32-Heating fuse; 33-Shunt unit; 34-Pre-charge resistor; 35-Pre-charge relay; 36-Heating relay; 37-Main positive relay; 38-Fast charging relay; 39-Main negative relay. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected" and "linked" should be interpreted broadly, for example, as a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, when describing pipelines, the terms "connected" and "linked" as used in this application have the meaning of establishing electrical connection. The specific meaning needs to be understood in conjunction with the context.

[0030] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0031] To ensure the smooth operation of the battery system's charging and discharging, a battery pack circuit breaker unit, such as relays and fuses, is required. To facilitate the assembly of these components, an integrated battery distribution unit (BDU) assembly is used, and the BDU is then directly connected to the battery pack via a junction box.

[0032] However, on the one hand, the current battery pack BDU shell needs to be designed independently. Each different model, function, and circuit power amplifier requires a different BDU design, resulting in resource waste, high development costs, and long product development cycles. On the other hand, the BDU assembly is an integrated component. When internal components such as a single relay unit stick together or a fuse blows, it is difficult to repair. The usual solution is to directly replace the entire BDU assembly, which results in high repair costs.

[0033] Therefore, please refer to Figure 1 This application provides a battery pack power distribution unit, including a mounting plate 1, a power connection plate 2, and components 3.

[0034] Please refer to Figure 1 The mounting plate 1 can be made of plastic and is generally flat, or it can have recesses and protrusions to facilitate the mating with different components and ensure the stable installation of different components 3. Its material can be polybutylene terephthalate or other plastic materials.

[0035] Alternatively, mounting plate 1 can also be made of aluminum alloy, for example, the plate can be formed using sheet metal parts.

[0036] Please refer to Figure 1 The junction board 2 includes a module main positive junction board 21, a module main negative junction board 22, a discharge positive junction board 232, and a discharge negative junction board 242, which are independent of each other. The module main positive junction board 21, the module main negative junction board 22, the discharge positive junction board 232, and the discharge negative junction board 242 are respectively disposed on both sides of the mounting plate 1 along the width direction of the mounting plate 1.

[0037] Please refer to Figure 1 The junction board 2 is the main circuit connecting the battery pack power distribution unit to the battery pack and external power source. It can use copper busbars, copper-aluminum busbars, or aluminum busbars for electrical connection.

[0038] Please refer to Figure 1Component 3 is disposed on one side of the mounting plate 1. Component 3 includes a main fuse 31, a heating fuse 32, a shunt 33, a pre-charge resistor 34, a pre-charge relay 35, a heating relay 36, a main positive relay 37, a fast-charge relay 38, and a main negative relay 39. The main fuse 31, heating fuse 32, shunt 33, pre-charge resistor 34, pre-charge relay 35, heating relay 36, main positive relay 37, fast-charge relay 38, and main negative relay 39 are all commonly used components in the battery pack power distribution unit. The models of these components can be selected according to design requirements.

[0039] Please refer to Figure 1 Among them, the module main positive terminal board 21, main fuse 31, main positive relay 37, and discharge positive terminal board 232 are connected in sequence; the discharge negative terminal board 242, main negative relay 39, and module main negative terminal board 22 are connected in sequence; the module main positive terminal board 21, precharge relay 35, precharge resistor 34, and discharge positive terminal board 232 are connected in sequence; the module main positive terminal board 21, fast charge relay 38, and the positive terminal of the fast charge interface are connected in sequence; and the module main positive terminal board 21, heating relay 36, heating fuse 32, and the positive terminal of the heating equipment are connected in sequence.

[0040] Please refer to Figure 1 In this application, the grounding board 2 and various components 3 are directly configured on the mounting plate 1. The position of each component is fixed by the board body, which can achieve the effect of pre-installation of the circuit breaker unit. By scattering the various components 3 on the mounting plate 1, the integration of components 3 can be avoided, so that when a component 3 is damaged, it can be directly replaced and repaired, reducing maintenance costs.

[0041] The battery pack module does not require space to be reserved for the BDU housing. Compared with existing integrated solutions, this solution uses less space, allowing more space to be used for the layout of the battery pack or other components, which helps to improve the energy density of the battery pack or accommodate more auxiliary equipment.

[0042] When designing the circuit breaker unit, the model and type of component 3 can be directly adjusted according to the function, and component 3 can be directly replaced without setting up an independent module housing, which reduces the research and development and manufacturing cycle and improves the universality and adaptability of the circuit breaker unit.

[0043] Meanwhile, the above-mentioned connection relationship between components 3 in this solution can be directly arranged on the mounting plate 1. Through the above circuit arrangement, various functions of the traditional integrated BDU unit can be realized, avoiding functional degradation. Components 3 in this solution are directly installed on the same side of the mounting plate 1, which makes the circuit arrangement more convenient compared to the traditional structure.

[0044] Please refer to Figure 1For example, the main circuit sequence is: module main positive terminal board 21 → main fuse 31 → main positive relay 37 → discharge positive terminal board 232.

[0045] Main circuit return sequence: Discharge negative terminal board 242 → Main negative relay 39 → Module main negative terminal board 22.

[0046] Pre-charging circuit sequence: Module main positive connection board 21 → Pre-charging relay 35 → Pre-charging resistor 34 → Discharge positive connection board 232.

[0047] Fast charging circuit sequence: Module main positive terminal board 21 → Fast charging relay 38 → Fast charging interface positive terminal.

[0048] Heating circuit sequence: Module main positive terminal 21 → Heating relay 36 → Heating fuse 32 → Heating equipment positive terminal.

[0049] Please refer to Figure 1 Specifically:

[0050] The main circuit connection includes the module's main positive terminal board 21 and the module's main negative terminal board 22.

[0051] Module main positive terminal 21: Serves as the collection point for the positive terminals of the battery modules, connected to one end of the main positive relay 37. The main positive relay 37 controls the connection and disconnection between the battery positive terminal and the external circuit. Its other end is connected to the discharge positive terminal 232, which provides positive voltage to external loads (such as motor controllers). The main fuse 31 is typically connected in series between the module main positive terminal 21 and the main positive relay 37. When an overcurrent occurs in the main circuit, the main fuse 31 blows, cutting off the circuit and protecting the battery and other equipment.

[0052] Module main negative terminal 22: This is the junction point for the negative terminals of the battery module, connected to one end of the main negative relay 39. The main negative relay 39 controls the connection and disconnection between the battery negative terminal and the external circuit, and its other end is connected to the discharge negative terminal 242, forming a current loop for the external load.

[0053] The function of the pre-charging circuit is to charge the load capacitor before the main positive relay 37 closes, preventing a large current surge during the closing process. The pre-charging resistor 34 and the pre-charging relay 35 are connected in series and then in parallel across the main positive relay 37. One end of the pre-charging relay 35 is connected to the module's main positive terminal board 21 (usually after the main fuse 31), and the other end of the pre-charging resistor 34 is connected to the discharge positive terminal board 232. When the system is powered on, the pre-charging relay 35 closes first, and current slowly charges the load capacitor through the pre-charging resistor 34. When the capacitor voltage approaches the battery voltage, the main positive relay 37 closes, and then the pre-charging relay 35 is opened.

[0054] The fast-charging relay 38 is used to control the fast-charging function. One end of the fast-charging relay 38 is connected to the module's main positive terminal block 21 (usually after the main fuse 31), and the other end is connected to the positive terminal of the dedicated fast-charging interface. The negative terminal of the fast-charging interface is connected to the module's main negative terminal block 22. During fast charging, the fast-charging relay 38 is closed, connecting the battery to the fast-charging device.

[0055] The heating circuit is used to heat the battery in low-temperature environments. A heating fuse 32 is connected in series in the heating circuit for overcurrent protection. One end of the heating relay 36 is connected to the module's main positive terminal 21 (usually after the main fuse 31), and the other end is connected to one end of the heating fuse 32. The other end of the heating fuse 32 is connected to the positive terminal of the heating device, and the negative terminal of the heating device is connected to the module's main negative terminal 22. When battery heating is required, the heating relay 36 is closed, and current flows through the heating device to generate heat.

[0056] Shunt 33 is used to measure the current in the circuit. Usually, shunt 33 is connected in series between the main negative relay 39 and the discharge negative terminal plate 242. By measuring the voltage drop across shunt 33, the magnitude of the current in the circuit can be calculated according to Ohm's law.

[0057] Please refer to Figure 1 In some examples, the main positive relay 37 and the discharge positive terminal 232 are electrically connected to the external circuit. The main positive relay 37 is used to control the connection and disconnection between the positive terminal of the battery and the external circuit. The main negative relay 39 and the discharge negative terminal 242 are electrically connected to the external circuit and are used to control the connection and disconnection between the negative terminal of the battery and the external circuit.

[0058] The connection structure between the discharge positive terminal board 232, the discharge negative terminal board 242 and the external circuit facilitates the electrical connection of the external circuit and the battery module. At the same time, the connection between this part and the external circuit can realize the function of controlling the current on and off of the external circuit through the main positive relay 37 and the main negative relay 39.

[0059] For example, starting from the negative terminal of the battery pack, the main negative relay 39 is connected first. The function of the main negative relay 39 is to control the connection between the negative terminal of the battery pack and the external circuit. Next, the current flows through the copper busbar (i.e., the connecting plate 2) and other conductive connections to the current sensor, which is used to monitor the magnitude of the current output by the battery pack in real time. Then it is connected to the battery pack, and after exiting the battery pack, it is connected to the fuse. The fuse is used to cut off the circuit in time when a fault such as overcurrent occurs in the circuit, protecting other components.

[0060] A switching relay is connected after the fuse. This relay switches the circuit connections between different operating modes (e.g., low-voltage and high-voltage). The switching relay connects to another battery pack, which in turn connects to a main positive relay 37. The main positive relay 37 controls the connection between the positive terminal of the battery pack and the external circuit. The positive terminal of the main positive relay 37 has a positive interface for connecting other components of the battery pack, such as a motor controller.

[0061] Please refer to Figure 1 In some examples, the module main positive terminal board 21 is used to connect to the positive terminal of the battery module; the module main negative terminal board 22 is used to connect to the negative terminal of the battery module. The connection between the module main positive terminal board 21, the module main negative terminal board 22 and the battery module enables the battery pack power distribution unit provided in this application to realize the power supply and de-energization of the battery module through wiring.

[0062] Please refer to Figure 1 In some examples, the mounting plate 1 includes a first part 11 and a second part 12 distributed along the length direction, and the components 3 of the first part 11 and the second part 12 are electrically connected through a junction plate 2; the main fuse 31, the heating fuse 32, the pre-charge resistor 34, the pre-charge relay 35 and the heating relay 36 are disposed on the first part 11; the main positive relay 37, the fast charging relay 38, the main negative relay 39 and the shunt 33 are disposed on the second part 12.

[0063] Component 3 is installed on the first part 11 and the second part 12 respectively, which facilitates reasonable layout and the installation and arrangement of the circuit. The power supply board 2 can stabilize the current when connected to power.

[0064] Please refer to Figure 1 In some examples, the first part 11 and the second part 12 can be two parts of the mounting plate 1 along the length direction. These two parts can abut each other or have a gap. The first part 11 and the second part 12 can be exactly the same, or the first part 11 can be larger than the second part 12 or smaller than the second part 12.

[0065] In some examples, the heating fuse 32 is located on the side of the first part 11 near the second part 12; the main fuse 31, the pre-charge resistor 34, the pre-charge relay 35, and the heating relay 36 are located on one side of the heating fuse 32. The positioning of the main fuse 31, the pre-charge resistor 34, the pre-charge relay 35, and the heating relay 36 facilitates the arrangement of the circuitry on the heating fuse 32.

[0066] In some examples, the above scheme is only an example of a layout position. The scope of protection that this scheme can protect should not be limited to the above-mentioned layout range, but should also include the distribution positions of other components 3 that are installed on the first part 11 and maintain the above-mentioned circuit connection state.

[0067] Please refer to Figure 1 In some examples, the main fuse 31, pre-charge resistor 34, and pre-charge relay 35 are spaced apart along the width of the mounting plate 1, and the heating relay 36 is disposed between the pre-charge relay 35 and the heating fuse 32. The distribution of the main fuse 31, pre-charge resistor 34, pre-charge relay 35, and heating relay 36 facilitates the electrical connection of the components 3 at the first part 11.

[0068] In some examples, the main fuse 31, the pre-charge resistor 34, and the pre-charge relay 35 are spaced apart along the width of the mounting plate 1, and the spacing between adjacent components may be the same or different.

[0069] Please refer to Figure 1 In some examples, along the length of the mounting plate 1, in the direction from the first part 11 to the second part 12, the main positive relay 37, the fast charging relay 38 and the main negative relay 39 are distributed in sequence at intervals, and the shunt 33 and the main negative relay 39 are distributed at intervals along the width of the mounting plate 1.

[0070] The positions of the main positive relay 37, fast charging relay 38, main negative relay 39, and shunt 33 facilitate the electrical connection of the components 3 in the second part 12.

[0071] In some examples, the direction of the first part 11 pointing to the second part 12 not only represents the length direction, but should also have the direction of the distribution of the relative positions of the first part 11 and the second part 12, and is the direction of the first part 11 toward the second part 12.

[0072] The main positive relay 37, fast charging relay 38 and main negative relay 39 are distributed in sequence at intervals, and the intervals between two adjacent components 3 may be different.

[0073] Please refer to Figure 1 In some examples, the mounting plate 1 also has multiple fixing holes 13, and the battery pack power distribution unit also includes multiple first threaded parts 14. The multiple first threaded parts 14 are arranged one-to-one with the multiple fixing holes 13. Multiple components 3 are respectively arranged at the multiple fixing holes 13. The first threaded parts 14 pass through the components 3 and are fixedly connected to the corresponding fixing holes 13 so that the components 3 are relatively fixed to the mounting plate 1.

[0074] The fixing hole 13 and the first threaded part 14 can facilitate the fixed connection between the component 3 and the mounting plate 1, so that the position of the component 3 is stable and the connection relationship is stable.

[0075] Please refer to Figure 1 In some examples, the fixing hole 13 can be a threaded hole or a through hole, in which case the first threaded component 14 can be fitted with the fixing hole 13. When the fixing hole 13 is a threaded hole, the threaded component can be a bolt or a bolt washer; when the fixing hole 13 is a through hole, the threaded component can be a bolt nut, stud nut, or other fastener adapted to the through hole.

[0076] Please refer to Figure 1 In some examples, multiple mounting holes 15 are formed at the two width edges of the mounting plate 1. The battery pack power distribution unit also includes multiple second threaded parts, which are configured one-to-one with the multiple mounting holes 15. The mounting plate 1 is used to fit against the inner wall of the battery pack. The second threaded parts pass through the corresponding mounting holes 15 and are fixedly connected to the battery pack.

[0077] Please refer to Figure 1 In some examples, mounting hole 15 can fix mounting plate 1 in a designated position inside battery pack. Therefore, mounting hole 15 can be a through hole, and the second threaded part can be a bolt washer and nut to make the connection between mounting plate 1 and battery pack stable.

[0078] Mounting hole 15 and second threaded part enable the battery pack power distribution unit of this application to be fixedly installed in a designated area inside the battery pack, which helps to stabilize the wiring connection between the components 3 and the battery cells in the power distribution unit.

[0079] In the description of this specification, specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples.

[0080] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A battery pack power distribution unit, characterized in that, include: Mounting plate; The power supply board includes a module main positive power supply board, a module main negative power supply board, a discharge positive power supply board, and a discharge negative power supply board, which are independent of each other. The module main positive power supply board, the module main negative power supply board, the discharge positive power supply board, and the discharge negative power supply board are respectively disposed on both sides of the mounting plate along the width direction of the mounting plate. The components are disposed on one side of the mounting plate, including a main fuse, a heating fuse, a shunt, a pre-charge resistor, a pre-charge relay, a heating relay, a main positive relay, a fast-charge relay, and a main negative relay. Specifically, the module main positive terminal board, the main fuse, the main positive relay, and the discharge positive terminal board are electrically connected in sequence; the discharge negative terminal board, the main negative relay, and the module main negative terminal board are electrically connected in sequence; the module main positive terminal board, the pre-charge relay, the pre-charge resistor, and the discharge positive terminal board are electrically connected in sequence; the module main positive terminal board, the fast-charge relay, and the positive terminal of the fast-charge interface are electrically connected in sequence; and the module main positive terminal board, the heating relay, the heating fuse, and the positive terminal of the heating device are electrically connected in sequence.

2. The battery pack power distribution unit according to claim 1, characterized in that, The main positive relay and the discharge positive terminal are electrically connected to the external circuit. The main positive relay is used to control the connection and disconnection between the positive terminal of the battery and the external circuit. The main negative relay and the discharge negative terminal board are electrically connected to the external circuit and are used to control the connection and disconnection of the battery negative terminal and the external circuit.

3. The battery pack power distribution unit according to claim 2, characterized in that, The module's main positive terminal board is used to connect to the positive terminal of the battery module. The module's main negative terminal board is used to connect to the negative terminal of the battery module.

4. The battery pack power distribution unit according to any one of claims 1 to 3, characterized in that, The mounting plate has a first part and a second part distributed along its length, and the components in the first part and the second part are electrically connected through a junction plate. The main fuse, the heating fuse, the pre-charge resistor, the pre-charge relay, and the heating relay are disposed on the first part; The main positive relay, the fast charging relay, the main negative relay, and the shunt are disposed on the second part.

5. The battery pack power distribution unit according to claim 4, characterized in that, The heating fuse is located on the side of the first part closer to the second part; The main fuse, the pre-charge resistor, the pre-charge relay, and the heating relay are disposed on one side of the heating fuse.

6. The battery pack power distribution unit according to claim 5, characterized in that, The main fuse, the pre-charge resistor, and the pre-charge relay are spaced apart along the width of the mounting plate, and the heating relay is disposed between the pre-charge relay and the heating fuse.

7. The battery pack power distribution unit according to claim 4, characterized in that, Along the length of the mounting plate, and in the direction from the first portion to the second portion, the main positive relay, the fast charging relay, and the main negative relay are sequentially spaced apart. The shunt and the main negative relay are spaced apart along the width of the mounting plate.

8. The battery pack power distribution unit according to claim 1, characterized in that, The mounting plate also has multiple fixing holes, and the battery pack power distribution unit also includes multiple first threaded parts. The multiple first threaded parts are arranged one-to-one with the multiple fixing holes. The multiple components are respectively arranged at the multiple fixing holes. The first threaded parts pass through the components and are fixedly connected to the corresponding fixing holes, so that the components are relatively fixed to the mounting plate.

9. The battery pack power distribution unit according to claim 1, characterized in that, The mounting plate also has multiple mounting holes formed at its two width edges. The battery pack power distribution unit also includes multiple second threaded parts, which are arranged one-to-one with the mounting holes. The mounting plate is used to fit against the inner wall of the battery pack. The second threaded parts pass through the corresponding mounting holes and are fixedly connected to the battery pack.

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