Functional module, power distribution device, battery pack and electric equipment

Abstract

The utility model discloses a functional module, a power distribution device, a battery pack and electric equipment. The functional module comprises a shell, a first module and a second module. The first module is arranged in the shell and used for being electrically connected with a battery pack of the battery pack, the first module comprises a body, a main positive relay, a fuse, a pre-charging relay and a pre-charging resistor, the main positive relay is electrically connected with a first connector, the fuse is electrically connected with a second connector, and the first connector and the second connector both penetrate through the body. The second module is arranged in the shell and used for being electrically connected with the battery pack, the second module comprises a main body, a main negative relay and a current acquisition unit, the main negative relay comprises a communicating vessel, a separator and a coil, the communicating vessel penetrates through the shell, the separator is arranged between the communicating vessel and the coil, and the current acquisition unit comprises a body part and an electric connecting piece; the body part is sleeved on the communicating vessel, a first end of the electric connecting piece is electrically connected with the body part, a second end of the electric connecting piece is installed on the separating piece in a penetrating mode, and the second module is electrically connected with the first module.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a functional module, a power distribution device, a battery pack and electrical equipment. Background Art

[0002] The power distribution device is a common device in the battery pack. The power distribution device can open and close the circuit to control the charging and discharging of the battery pack. In the related art, the power distribution device includes electrical components such as the main positive relay, fuse, pre-charge relay, main negative relay and current acquisition unit, and these electrical components are all independent components. Therefore, the overall volume of the power distribution device is relatively large. Therefore, when the power distribution device is installed inside the battery pack, the space occupied by the power distribution device in the battery pack is relatively large, which is not conducive to the miniaturization of the battery pack. Utility Model Content

[0003] Embodiments of the present application provide a functional module, a power distribution device, a battery pack, and electrical equipment.

[0004] The functional module of certain embodiments of the present application is applied to a power distribution device, and the functional module includes a housing, a first module, and a second module. The first module is arranged in the housing and is used to be electrically connected to the battery pack of the battery pack. The first module includes a body, a main positive relay, a fuse, a pre-charge relay, and a pre-charge resistor. The body is provided with a receiving cavity. The main positive relay, the fuse, the pre-charge relay, and the pre-charge resistor are all electrically connected and arranged in the receiving cavity. The main positive relay is electrically connected to a first connector, and the fuse is electrically connected to a second connector. The first connector and the second connector are both passed through the body. The second module is arranged in the shell and is used to be electrically connected to the battery pack. The second module includes a main body, a main negative relay and at least one current collection unit. The main body is provided with a accommodating cavity. The main negative relay and the current collection unit are both arranged in the accommodating cavity. The main negative relay includes a communicating vessel, a partition and a coil. The communicating vessel passes through the shell. The partition is arranged between the communicating vessel and the coil. The current collection unit includes a main body and an electrical connector. The main body is sleeved on the communicating vessel. The first end of the electrical connector is electrically connected to the main body. The second end of the electrical connector is passed through and installed on the partition. The first connector and the second connector are both electrically connected to the communicating vessel to electrically connect the second module to the first module.

[0005] In some embodiments, one end of the fuse is electrically connected to the main positive relay through a first copper busbar, and the other end is electrically connected to the second connector through a second copper busbar. The main positive relay includes a first end and a second end opposite to each other. The first connector and the first copper busbar are both electrically connected to the first end of the main positive relay. The pre-charge relay is electrically connected to the first connector and the pre-charge resistor, and the pre-charge resistor is electrically connected to the first copper busbar.

[0006] In some embodiments, the distance between the first end of the main positive relay and the side of the first copper busbar facing away from the first end of the main positive relay is smaller than the distance between the first end of the main positive relay and the side of the first connector facing away from the first end of the main positive relay.

[0007] In some embodiments, a connector is provided on the first copper busbar. The first module further includes a first wiring harness, a second wiring harness, and a third wiring harness. The first wiring harness is electrically connected to the pre-charging relay and the pre-charging resistor. One end of the second wiring harness is electrically connected to the first connector, and the other end is electrically connected to the pre-charging relay. One end of the third wiring harness is electrically connected to the first copper busbar through the connector, and the other end is electrically connected to the pre-charging resistor.

[0008] In some embodiments, the body includes a first side wall and a second side wall opposite to each other, and a peripheral wall located between the first side wall and the second side wall, and the first side wall, the second side wall and the peripheral wall together form a accommodating cavity; the first connector and the second connector are both arranged through the first side wall.

[0009] In some embodiments, the first module further includes a third connector and a fourth connector. The third connector is electrically connected to the main positive relay and is passed through the body. The fourth connector is electrically connected to the pre-charge relay and is passed through the body, and both the third connector and the fourth connector are low-voltage connectors.

[0010] In some embodiments, the communicating vessel includes a first communicating vessel and a second communicating vessel, and the first communicating vessel and the second communicating vessel are arranged at an interval. The main negative relay also includes a moving member, the moving member is electrically connected to the coil, and the moving member can move between the coil and the communicating vessel to selectively open or close the electrical connection between the first communicating vessel and the second communicating vessel.

[0011] In some embodiments, the communicating vessel includes a first peripheral wall opposite to the inner peripheral wall of the main body, and the moving member includes a second peripheral wall opposite to the inner peripheral wall of the main body. The current collection unit also includes a first circuit board, which is disposed on the first peripheral wall and is electrically connected to the main body and the first end of the electrical connector, and the electrical connector is spaced apart from the second peripheral wall.

[0012] In some embodiments, the current collection unit includes one, and the main body of the current collection unit is electrically connected to the first connecting vessel or the second connecting vessel.

[0013] In some embodiments, the current collection unit includes two units, wherein the main body of one of the current collection units is electrically connected to the first connecting vessel; and the main body of the other current collection unit is electrically connected to the second connecting vessel.

[0014] In some embodiments, the main body also includes a plug-in portion opposite to the current collection unit, and the plug-in portion is arranged on the outer wall of the main body; the second module also includes a wiring harness, one end of which is electrically connected to the battery management system, and the other end is electrically connected to the second end of the electrical connector through the plug-in portion.

[0015] In some embodiments, when the current collection units include two, the plug-in parts include two, and the two plug-in parts are arranged on the same side of the main body.

[0016] In some embodiments, the functional module also includes a heating module, which is disposed in the shell and electrically connected to the second module and the first module. The heating module includes a heating shell, a heating relay and a heating fuse. The heating shell is provided with a accommodating space, and the heating relay and the heating fuse are both disposed in the accommodating space.

[0017] In some embodiments, the functional module further includes a connecting copper bar, and the connecting copper bar includes a positive copper bar, a positive output copper bar, a negative copper bar, a negative output copper bar, a third copper bar, and a fourth copper bar. The positive copper bar and the positive output copper bar are electrically connected to the first connector and the second connector respectively; the negative copper bar and the negative output copper bar are both electrically connected to the connecting vessel; one end of the third copper bar is electrically connected to the heating module of the functional module, and the other end is electrically connected to the positive output copper bar; one end of the fourth copper bar is electrically connected to the heating module, and the other end is electrically connected to the negative output copper bar.

[0018] In some embodiments, the functional module also includes a battery management system (Battery Management System, BMS), which is disposed in the shell and is electrically connected to the first module, the second module and the heating module of the functional module. The battery management system is used to control the operation of the first module, the second module and the heating module.

[0019] The power distribution device of the battery pack in certain embodiments of the present application includes the functional module and the fast charging module described in any of the above embodiments, the fast charging module is arranged outside the shell and is electrically connected to the functional module, and the fast charging module and the functional module are used together to control the operation of the battery pack.

[0020] In certain embodiments, the power distribution device further includes a fast charging module, which is disposed outside the shell and electrically connected to the functional module, and the fast charging module and the functional module are used together to control the operation of the battery pack; the fast charging module includes a fast charging shell, a fast charging fuse, a first relay, a second relay and a second circuit board, the fast charging fuse, the first relay and the second relay are arranged side by side and are all installed on the fast charging shell, the fast charging fuse is electrically connected to the first relay, and the first relay and the second relay are both electrically connected to the second circuit board.

[0021] In some embodiments, both the first relay and the second relay are provided with plug-ins, and the plug-ins are used to be electrically connected to the second circuit board.

[0022] In some embodiments, the second circuit board is a single-layer board.

[0023] The battery pack of certain embodiments of the present application comprises a battery pack and a power distribution device as described in any of the above embodiments. The power distribution device is electrically connected to the battery pack and is used to control the charging and discharging of the battery pack.

[0024] The electrical equipment of certain embodiments of the present application includes the battery pack described in the above embodiments.

[0025] In the functional modules, power distribution devices, battery packs and electrical equipment of the embodiments of the present application, a first module is arranged in a shell and includes a main body, a main positive relay, a fuse, a pre-charge relay and a pre-charge resistor. The main positive relay, the fuse, the pre-charge relay and the pre-charge resistor are electrically connected and arranged in the accommodation cavity of the main body. The second module is arranged in the shell and includes a main body, a main negative relay and at least one current acquisition unit. The main negative relay and the current acquisition unit are arranged in the accommodation cavity of the main body, and the first module is electrically connected to the second module. Therefore, compared with the traditional main positive relay, fuse, pre-charge relay, pre-charge resistor, main negative relay and current acquisition unit as independent components, the main positive relay, fuse, pre-charge relay and pre-charge resistor can be integrated into a first module, the main negative relay and the current acquisition unit can be integrated into a second module, and the first module and the second module can be installed in the battery pack as a whole, so that the space occupied by the functional module is smaller, the utilization rate of the internal space of the battery pack is improved, and the miniaturization of the battery pack is realized.

[0026] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0028] Figure 1 It is a schematic diagram of the structure of an electrical device in some embodiments of the present application;

[0029] Figure 2 is a circuit diagram of a battery pack according to an embodiment of the present application;

[0030] Figure 3 yes Figure 1 A three-dimensional exploded schematic diagram of a functional module in a power distribution device of a battery pack of an electrical device shown;

[0031] Figure 4 yes Figure 3 A schematic diagram of the three-dimensional structure of the first module in the functional module shown;

[0032] Figure 5 yes Figure 3 A three-dimensional exploded schematic diagram of the first module in the functional module shown;

[0033] Figure 6 yes Figure 3 A schematic diagram of a three-dimensional structure of an implementation of a second module in the functional module shown;

[0034] Figure 7 yes Figure 6The exploded perspective view of the second module shown;

[0035] Figure 8 yes Figure 3 A schematic diagram of a three-dimensional structure of another embodiment of the second module in the functional module shown;

[0036] Fig. 9 yes Figure 8 The exploded perspective view of the second module shown;

[0037] Fig.10 is a circuit diagram of a battery pack according to another embodiment of the present application;

[0038] Fig.11 yes Figure 1 A schematic diagram of the three-dimensional structure of a fast charging module in a power distribution device of a battery pack of an electrical equipment is shown.

[0039] Description of main component symbols:

[0040] Electrical equipment 3000, vehicle body 3100;

[0041] Battery pack 2000;

[0042] Power distribution device 1000; battery pack 1100; charging and discharging circuit 1200; heating element 1300; first connector 1400; second connector 1500; fast charging circuit 1600;

[0043] Functional module 100;

[0044] Housing 10;

[0045] The first module 20, the main body 21, the accommodating cavity 201, the first side wall 211, the second side wall 213, the peripheral wall 215, the outer peripheral wall 2151, the main positive relay 22, the first end 221 of the main positive relay, the second end 223 of the main positive relay, the fuse 23, the first end 231 of the fuse, the second end 233 of the fuse, the pre-charge relay 24, the pre-charge resistor 25, the first connector 26, the second connector 27, the first copper bus 281, the connector 2811, the second copper bus 283, the first wire harness 291, the second wire harness 293, the third wire harness 295, the third connector 297, and the fourth connector 299;

[0046] The second module 30, the main body 31, the accommodating cavity 301, the first side wall 311, the second side wall 313, the peripheral wall 315, the inner peripheral wall 3151, the outer peripheral wall 3153, the plug-in portion 317, the main negative relay 33, the connecting vessel 331, the first connecting vessel 3311, the second connecting vessel 3313, the first peripheral wall 3315, the partition 333, the coil 335, the moving part 337, the second peripheral wall 3371, the first sub-section 338, the second sub-section 339, the current collection unit 35, the main body 351, the electrical connector 353, the first end 3531 of the electrical connector, the second end 3533 of the electrical connector, the first circuit board 355, and the low-voltage connecting vessel 37;

[0047] Heating module 40, heating shell 41, heating relay 43, heating fuse 45;

[0048] Connecting copper bar 50, positive copper bar 51, positive output copper bar 52, negative copper bar 53, negative output copper bar 54, third copper bar 55, fourth copper bar 56;

[0049] Battery management system 60;

[0050] Fast charging module 200 , fast charging housing 210 , fast charging fuse 220 , first relay 230 , second relay 240 , second circuit board 250 , and plug-in piece 260 . DETAILED DESCRIPTION

[0051] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0052] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0053] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0054] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0056] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0057] See also Figure 1, the electric device 3000 of certain embodiments of the present application includes a battery pack 2000. The electric device 2000 includes but is not limited to vehicles, energy storage cabinets or aircraft. Specifically, in certain embodiments, when the electric device 3000 includes a vehicle, the vehicle includes a body 3100, and the battery pack 2000 is installed in the body 3100. The battery pack 2000 can provide a power source for the vehicle to enable the vehicle to operate normally. It should be noted that vehicles include but are not limited to pure electric vehicles, hybrid vehicles and other passenger vehicles or large-scale engineering vehicles whose working conditions are not very severe.

[0058] Among them, since the electric device 3000 in this embodiment includes the battery pack 2000, it can be understood that the electric device 3000 also includes at least the same beneficial effects as the battery pack 2000. Therefore, for the beneficial effects of the electric device 3000, please refer to the beneficial effects of the battery pack 2000 described below.

[0059] See also Figure 1 The battery pack 2000 of some embodiments of the present application includes a battery pack 1100 and a power distribution device 1000. The power distribution device 1000 is electrically connected to the battery pack 1100, and the power distribution device 1000 is used to control the charging and discharging of the battery pack 1100.

[0060] The power distribution device 1000 is disposed in the battery pack 2000 and is electrically connected to the battery group 1100. Thus, the power distribution device 1000 can realize functions such as charge and discharge control, temperature monitoring and protection (including overcharge protection, over-discharge protection and short-circuit protection, etc.) of the battery group 1100, thereby improving the stability of the battery pack 2000 in supplying power to the power-consuming device 3000 and ensuring the stable operation of the power-consuming device 3000. It is understandable that the power distribution device 1000 can be designed to match the different power-consuming devices 3000 to meet the use requirements of different power-consuming devices 3000.

[0061] In some embodiments, the battery pack 2000 may include at least one battery pack 1100, wherein the number of battery packs 1100 in the battery pack 2000 may be adjusted according to different application scenarios of the battery pack 2000. Further, the battery pack 1100 may include multiple batteries, and the number of batteries in the battery pack 1100 may be adjusted according to the application scenario and capacity of the battery pack 1100. It should be noted that in some embodiments, the multiple batteries in the battery pack 1100 may be connected in series, in parallel or in a mixed manner, and the mixed manner means that the multiple batteries are both connected in series and in parallel. Among them, since the battery pack 2000 in this embodiment includes the power distribution device 1000 and at least one battery pack 1100, it can be understood that the battery pack 2000 at least also includes the same beneficial effects as the power distribution device 1000 and the battery pack 1100. Therefore, the beneficial effects of the battery pack 2000 refer to the beneficial effects of the power distribution device 1000 described below.

[0062] See also Figure 1 and Figure 2 The power distribution device 1000 of the battery pack in some embodiments of the present application includes a functional module 100, and the functional module 100 is used to control the operation of the battery pack 2000. It should be noted that in some embodiments, the power distribution device 1000 may include but is not limited to a battery disconnect unit (Battery Disconnect Unit, BDU) and a high-voltage power distribution unit (Power Distribution Unit, PDU).

[0063] Among them, since the distribution device 1000 includes the functional module 100, it can be understood that the distribution device 1000 also includes at least the same beneficial effects as the functional module 100. Therefore, for the beneficial effects of the distribution device 1000, please refer to the beneficial effects of the functional module 100 described below.

[0064] See also Figure 2 , Figure 3 , Figure 5 and Figure 7The functional module 100 of certain embodiments of the present application is applied to a power distribution device 1000, and the functional module 100 includes a housing 10, a first module 20, and a second module 30. The first module 20 is disposed in the housing 10 and is used to be electrically connected to the battery pack 1100 of the battery pack 2000. The first module 20 includes a body 21, a main positive relay 22, a fuse 23, a pre-charge relay 24, and a pre-charge resistor 25. The body 21 is provided with a receiving cavity 201. The main positive relay 22, the fuse 23, the pre-charge relay 24, and the pre-charge resistor 25 are all electrically connected and are all disposed in the receiving cavity 201. The main positive relay 22 is electrically connected to a first connector 26, and the fuse 23 is electrically connected to a second connector 27. The first connector 26 and the second connector 27 are both passed through the body 21. The second module 30 is arranged in the shell 10 and is used to be electrically connected to the battery pack 1100. The second module 30 includes a main body 31, a main negative relay 33 and at least one current collection unit 35. The main body 31 is provided with a accommodating cavity 301. The main negative relay 33 and the current collection unit 35 are both arranged in the accommodating cavity 301. The main negative relay 33 includes a connecting vessel 331, a partition 333 and a coil 335. The connecting vessel 331 passes through the shell 10. The partition 333 is arranged between the connecting vessel 331 and the coil 335. The current collection unit 35 includes a main body 351 and an electrical connector 353. The main body 351 is sleeved on the connecting vessel 331. The first end 3531 of the electrical connector 353 is electrically connected to the main body 351. The second end 3533 of the electrical connector 353 is passed through and installed on the partition 333. The first connector 26 and the second connector 27 are both electrically connected to the connecting vessel 331, so that the second module 30 is electrically connected to the first module 20. It should be noted that, in some embodiments, the first module 20 can select the main positive relay 22, fuse 23, pre-charge relay 24 and pre-charge resistor 25 with different parameters according to the use requirements of the battery pack 2000, and the second module 30 can select the main negative relay 33 and current acquisition unit 35 with different parameters according to the use requirements of the battery pack 2000, thereby improving the applicability of the functional module 100. Among them, the first connector 26, the second connector 27 and the connecting device 331 are all high-voltage connectors.

[0065] The housing 10 is a component for installing the first module 20 and the second module 30. The housing 10 can be made of one or more insulating materials such as plastic, rubber, glass or ceramic. Thus, the housing 10 can provide installation space for the first module 20 and the second module 30 on the one hand, and can prevent the operator from directly contacting the first module 20 and the second module 30 on the other hand, thereby improving the safety performance of the functional module 100.

[0066] The body 21 is a component for installing the main positive relay 22, the fuse 23, the pre-charge relay 24 and the pre-charge resistor 25. The body 21 can be made of one or more insulating materials such as plastic, rubber, glass or ceramic. Among them, the accommodating cavity 201 may include a variety of different shapes and sizes, for example, the accommodating cavity 201 may be a rectangular parallelepiped, a cylindrical shape or a hexagonal prism, etc. The shape of the accommodating cavity 201 can be determined according to the shape and size of the main positive relay 22, the fuse 23, the pre-charge relay 24 and the pre-charge resistor 25. Correspondingly, the main body 31 is a component for installing the main negative relay 33 and the current acquisition unit 35. The main body 31 can be made of one or more insulating materials such as plastic, rubber, glass or ceramic. Among them, the accommodating cavity 301 may include a variety of different shapes and sizes, for example, the accommodating cavity 301 may be a rectangular parallelepiped, a cylindrical shape or a hexagonal prism, etc. The shape of the accommodating cavity 301 can be determined according to the shape and size of the main negative relay 33 and the current acquisition unit 35.

[0067] In some embodiments, the first module 20 and the second module 30 can be disposed on the housing 10 in a detachable connection manner, so that the first module 20 and the second module 30 can be easily disassembled for repair or replacement when the first module 20 and the second module 30 are damaged. The detachable connection manner includes but is not limited to a snap connection or a threaded connection. In other embodiments, the first module 20 and the second module 30 can be disposed on the housing 10 in a non-detachable connection manner, so that the structural stability of the functional module 100 can be improved, and the electrical equipment 3000 ( Figure 1 During operation, the first module 20 and the second module 30 shake and fall off, thereby improving the working stability of the battery pack 2000. The non-detachable connection method includes but is not limited to bonding or welding.

[0068] In the functional module 100 of the embodiment of the present application, the first module 20 is arranged in the housing 10, and includes a body 21, a main positive relay 22, a fuse 23, a pre-charge relay 24 and a pre-charge resistor 25, the main positive relay 22, the fuse 23, the pre-charge relay 24 and the pre-charge resistor 25 are electrically connected, and are all arranged in the accommodating cavity 201 of the body 21, the second module 30 is arranged in the housing 10, and includes a body 31, a main negative relay 33 and at least one current acquisition unit 35, the main negative relay 33 and the current acquisition unit 35 are all arranged in the accommodating cavity 301 of the body 31, and the first module 20 and the second module 3 0 electrical connection, thus, compared with the traditional main positive relay, fuse, pre-charge relay, pre-charge resistor, main negative relay and current acquisition unit as independent components, the main positive relay 22, fuse 23, pre-charge relay 24 and pre-charge resistor 25 can be integrated into a first module 20, and the main negative relay 33 and the current acquisition unit 35 can be integrated into a second module 30, and the first module 20 and the second module 30 can be installed in the battery pack 2000 as a whole, so that the space occupied by the functional module 100 is smaller, the utilization rate of the internal space of the battery pack 2000 is improved, and the miniaturization of the battery pack 2000 is realized.

[0069] In addition, the main positive relay 22, the fuse 23, the pre-charge relay 24 and the pre-charge resistor 25 together form an integrated module structure (first module 20), and the main negative relay 33 and the current acquisition unit 35 together form an integrated module structure (second module 30), which can also simplify the number of cables of the distribution device 1000, thereby simplifying the line structure of the charging and discharging circuit 1200300 and reducing the failure rate.

[0070] See also Figure 2 In some embodiments, the power distribution device 1000 further includes a BMS 60, which is disposed in the housing 10 and electrically connected to the first module 20 and the second module 30. The battery management system 60 is used to control the operation of the first module 20 and the second module 30. Specifically, in this embodiment, compared with the BMS 60 being disposed outside the power distribution device 1000, the BMS 60 is integrated in the power distribution device 1000, which can improve the utilization rate of the internal space of the power distribution device 1000, realize the miniaturization of the power distribution device 1000, and thus realize the miniaturization of the battery pack 2000.

[0071] Specifically, in some embodiments, the BMS 60 may include a high voltage sampling unit (High Voltage Supervising Unit, HVSU) and a battery monitoring and control system (Battery Monitoring and Control, BMC). In other words, the HVSU and the BMC are integrated into the BMS 60. In other embodiments, the HVSU can be independently provided, that is, the HVSU is provided outside the BMS 60 and is electrically connected to the charge and discharge circuit 1200 and the BMS 60. In the embodiments of the present application, only the HVSU integrated into the BMS 60 is used as an example for description.

[0072] Among them, HVSU is an electrical component with functions such as current sampling, voltage or sintering detection and leakage detection, that is, HVSU can collect information such as temperature, current and voltage of the charging and discharging circuit 1200 of the battery pack 1100; BMC is a system that monitors the current, voltage and temperature of the battery pack 1100 in real time, and provides functions such as data acquisition, data processing, communication and control. In this application, BMC is responsible for real-time monitoring and control of the battery pack 1100, and can promptly detect and handle abnormal conditions of the battery. HVSU is responsible for monitoring the high-voltage part of the battery pack 1100 to prevent overvoltage or undervoltage. Therefore, HVSU and BMC are integrated in BMS60 to improve the reliability and safety of the battery pack 2000 and extend the service life of the battery pack 2000. In addition, compared with the independent settings of HVSU and BMC, the BMS60 of this embodiment does not need to set up additional interfaces and connecting lines. On the one hand, this can reduce the complexity of the BMS60 line, reduce the failure risk of BMS60, and ensure the normal operation of the battery pack 2000; on the other hand, when the BMS60 is integrated into the functional module 100, the size of the functional module 100 is smaller, which is conducive to the miniaturization of the distribution device 1000 and the battery pack 2000.

[0073] In addition, BMS60 can be electrically connected to the first module 20 and the second module 30 through copper busbars, wiring harnesses or electrical connecting plates, so that BMS60 can control the working status of the first module 20 and the second module 30 (for example, power on or power off, etc.), thereby controlling the operation of the battery pack 2000.

[0074] See also Figure 4 and Figure 5In some embodiments, one end of the fuse 23 is electrically connected to the main positive relay 22 through the first copper busbar 281, and the other end is electrically connected to the second connector 27 through the second copper busbar 283. The main positive relay 22 includes a first end 221 and a second end 223 relative to each other. The first connector 26 and the first copper busbar 281 are both electrically connected to the first end 221 of the main positive relay 22. The pre-charge relay 24 is electrically connected to the first connector 26 and the pre-charge resistor 25, and the pre-charge resistor 25 is electrically connected to the first copper busbar 281.

[0075] Please combine Figure 2 , wherein a relay is an electrical component that turns on or off a controlled circuit when an input quantity (such as voltage, current or temperature, etc.) reaches a specified value. In the embodiment of the present application, the main positive relay 22 is a relay with a normally open contact. The main positive relay 22 can connect or disconnect the battery pack 1100 in the charge and discharge circuit 1200 of the battery pack 2000. For example, when the coil 335 of the main positive relay 22 is activated, the contact is closed to turn on the charge and discharge circuit 1200 of the battery pack 1100, and when the input quantity reaches a specified value, the contact is disconnected to disconnect the charge and discharge circuit 1200 of the battery pack 1100. Therefore, the setting of the main positive relay 22 can protect the charge and discharge circuit 1200, thereby improving the working stability of the battery pack 2000.

[0076] The fuse 23 is an electrical component that uses the heat generated by itself to melt the fuse and disconnect the circuit when the current exceeds the specified value. In the embodiment of the present application, the first end 221 of the main positive relay 22 is electrically connected to the first connector 26, and the first end 221 of the main positive relay 22 is electrically connected to the fuse 23 through the first copper bus 281, and the other end of the fuse 23 is electrically connected to the second connector 27, so that the main positive relay 22 and the fuse 23 can be electrically connected and connected together to the position of the charging and discharging circuit 1200 of the battery pack 1100 close to the positive electrode of the battery pack 1100, so as to protect the charging and discharging circuit 1200, thereby improving the working stability of the battery pack 2000.

[0077] The pre-charge relay 24 is an electrical component that can open and close the pre-charge circuit and protect the electrical components and the charge-discharge circuit 1200 from large current shocks through the pre-charge resistor 25. In the embodiment of the present application, the pre-charge relay 24 can be electrically connected to the main positive relay 22 and the fuse 23 in parallel. Therefore, the setting of the pre-charge relay 24 can prevent the electrical components and the charge-discharge circuit 1200 in the battery pack 2000 from being damaged, thereby improving the working stability of the battery pack 2000.

[0078] The pre-charging resistor 25 is an electrical component that can limit the output current of the battery pack 1100. In the embodiment of the present application, the pre-charging resistor 25 is connected in series with the pre-charging relay 24, and the pre-charging resistor 25 and the pre-charging relay 24 are electrically connected in parallel with the main positive relay 22 and the fuse 23. Therefore, the setting of the pre-charging resistor 25 can prevent the electrical components and the charging and discharging circuit 1200 in the battery pack 2000 from being damaged, and further improve the working stability of the battery pack 2000.

[0079] Specifically, in some embodiments, the first module 20 can be electrically connected to other electrical components through the first connector 26 and the second connector 27 to jointly form a charge and discharge circuit 1200 of the battery pack 1100. For example, the current generated by the battery pack 1100 can enter the main positive relay 22 through the first connector 26, flow into the fuse 23 through the copper busbar between the main positive relay 22 and the fuse 23, and then flow out through the second connector 27 electrically connected to the fuse 23.

[0080] In the related art, the fuse is electrically connected to the main positive relay using a copper busbar, wherein the copper busbar needs to be connected and fixed to one of the two terminals of the main positive relay using fasteners (such as bolts, etc.). At this time, most of the structures of the fasteners (such as bolt heads and gaskets, etc.) are located outside the main positive relay and the fuse. On the one hand, this will cause users to be able to directly contact the fasteners, thereby causing safety problems; on the other hand, the fasteners are prone to interfere with other structures, thereby affecting the normal assembly of the main positive relay and the fuse in the battery pack. In the embodiment of the present application, the first copper busbar 281 is electrically connected to the first end 221 of the main positive relay 22 by welding. Therefore, compared with the use of fasteners for connection and fixing, on the one hand, it can improve the safety of the first module 20 and the functional module 100; on the other hand, it can reduce or even avoid the possibility of interference between the first module 20 and other structures, and ensure the normal assembly of the first module 20 in the housing 10.

[0081] In addition, the first copper busbar 281 can be accommodated in the accommodating cavity 201, thereby reducing the size of the integrated module formed by the main positive relay 22 and the fuse 23, that is, the overall size of the integrated module (first module 20) formed by the main body 21, the main positive relay 22, the fuse 23, the pre-charge relay 24 and the pre-charge resistor 25 is smaller, which is conducive to the miniaturization of the functional module 100.

[0082] See also Figure 4 and Figure 5In some embodiments, the body 21 includes a first side wall 211 and a second side wall 213 relative to each other, and a peripheral wall 215 located between the first side wall 211 and the second side wall 213. The first side wall 211 of the body 21, the second side wall 213 of the body 21 and the peripheral wall 215 of the body 21 together form a accommodating cavity 201. The main positive relay 22, the fuse 23, the pre-charge relay 24 and the pre-charge resistor 25 are all accommodated in the accommodating cavity 201, thereby enabling the housing 10, the main positive relay 22, the fuse 23, the pre-charge relay 24 and the pre-charge resistor 25 to form an integrated module. It can be understood that all structures in the first module 20 except the first connector 26 and the second connector 27 are housed in the main body 21. Therefore, on the one hand, the protection effect of the main body 21 on its internal electrical components (including the main positive relay 22, the fuse 23, the pre-charge relay 24 and the pre-charge resistor 25) can be further enhanced to ensure the working stability of the first module 20; on the other hand, the possibility of direct contact between the operator and the electrical components inside the main body 21 can be reduced as much as possible, thereby improving the safety performance of the first module 20.

[0083] In some embodiments, the first connector 26 and the second connector 27 are both installed through the first side wall 211 of the body 21. In other words, the first connector 26 and the second connector 27 are located on the same side of the body 21. Compared with the first connector 26 and the second connector 27 being installed through different side walls of the body 21, for example, the first connector 26 is installed through the first side wall 211 of the body 21, and the second connector 27 is installed through the second side wall 213 of the body 21 or the peripheral wall 215 of the body 21, the first connector 26 and the second connector 27 are both installed through the same side wall of the body 21. On the one hand, the size of the first module 20 in the height direction (i.e., the direction from the first side wall 211 of the body 21 to the second side wall 213 of the body 21, or the direction from the second side wall 213 of the body 21 to the first side wall 211 of the body 21) can be reduced, that is, the overall size of the first module 20 is reduced, thereby not only reducing the possibility of interference between the first connector 26 and the second connector 27 and other electrical components, but also realizing the battery pack 2000 ( Figure 1 On the other hand, it is convenient to electrically connect the first module 20 with other electrical components, and improve the power distribution device 1000 ( Figure 1 In the embodiment of the present application, the first connector 26 and the second connector 27 are both disposed through the first side wall 211 of the body 21 .

[0084] In certain embodiments, the main positive relay 22, the fuse 23, the pre-charge relay 24 and the pre-charge resistor 25 can be installed in the accommodating cavity 201 by means of welding, bonding, snap connection or threaded connection. On the one hand, this can improve the structural stability of the first module 20 and prevent the electrical components in the accommodating cavity 201 from shaking, which may cause the electrical connection between the first module 20 and other electrical components to fail, thereby improving the working stability of the battery pack 2000. On the other hand, compared with setting various assembly structures on the main body 21 to install the main positive relay 22, the fuse 23, the pre-charge relay 24 and the pre-charge resistor 25, the structure of the main body 21 in this embodiment is simpler, which is not only beneficial to improving the production efficiency of the main body 21, but also can improve the utilization rate of the internal space of the main body 21, thereby realizing the miniaturization of the first module 20.

[0085] In addition, in some embodiments, the main positive relay 22, the fuse 23, the pre-charge relay 24 and the pre-charge resistor 25 can be installed in the body 21 in a stacked manner. Therefore, compared with the main positive relay 22, the fuse 23, the pre-charge relay 24 and the pre-charge resistor 25 being installed in the body 21 in a flat manner, the internal space of the body 21 is fully utilized, which is conducive to the miniaturization of the first module 20. In the embodiment of the present application, the main positive relay 22 and the pre-charge relay 24 are respectively arranged at opposite ends of the accommodating cavity 201, the fuse 23 and the pre-charge resistor 25 are stacked and arranged between the main positive relay 22 and the pre-charge relay 24, and the fuse 23 is closer to the first side wall 211 of the body 21 than the pre-charge resistor 25.

[0086] See also Figure 2 and Figure 5 In some embodiments, the fuse 23 includes a first end 231 and a second end 233 opposite to each other. The first end 231 of the fuse 23 is electrically connected to the main positive relay 22 through the first copper bar 281, and the second end 233 of the fuse 23 is electrically connected to the second connector 27 through the second copper bar 283. Thus, an electrical connection can be formed between the first connector 26 and the second connector 27, so that the first module 20 can be electrically connected to other electrical components through the first connector 26 and the second connector 27 to jointly form the charge and discharge circuit 1200 of the battery pack 1100. It can be understood that in some embodiments, the second connector 27 can also be electrically connected to the second end 233 of the fuse 23 through a wiring harness or other electrical connectors.

[0087] In some embodiments, a connector 2811 is provided on the first copper bus 281. The first module 20 may further include a first wiring harness 291, a second wiring harness 293, and a third wiring harness 295. The first wiring harness 291 is electrically connected to the pre-charge relay 24 and the pre-charge resistor 25. One end of the second wiring harness 293 is electrically connected to the first connector 26, and the other end is electrically connected to the pre-charge relay 24. One end of the third wiring harness 295 is electrically connected to the first copper bus 281 through the connector 2811, and the other end is electrically connected to the pre-charge resistor 25, thereby enabling the pre-charge resistor 25 to be connected in series with the pre-charge relay 24, and the pre-charge resistor 25 and the pre-charge relay 24 are electrically connected to the main positive relay 22 and the fuse 23 in parallel.

[0088] It should be noted that, in some embodiments, the connector 2811 may be a welding point, that is, one end of the third wiring harness 295 may be connected to the first copper bar 281 by welding, thereby, one end of the third wiring harness 295 may be electrically connected to the first end 231 of the fuse 23, and compared with the use of fasteners (such as bolts, etc.) to connect to the first copper bar 281, the integrated module formed by the third wiring harness 295, the main positive relay 22 and the fuse 23 in this embodiment is smaller in size, which is conducive to the miniaturization of the battery pack 2000. In addition, the third wiring harness 295 can be accommodated in the accommodating cavity 201, thereby, on the one hand, the possibility of direct contact between the operator and the third wiring harness 295 can be reduced as much as possible, thereby improving the safety of the first module 20; on the other hand, it can reduce or even avoid the interference of the third wiring harness 295 with other structures, and ensure the normal assembly of the first module 20.

[0089] In some embodiments, the first module 20 also includes a third connector 297 and a fourth connector 299. The third connector 297 is electrically connected to the main positive relay 22 and is passed through the body 21. The fourth connector 299 is electrically connected to the pre-filling relay 24 and is passed through the body 21. The third connector 297 and the fourth connector 299 are both low-voltage connectors. Specifically, in some embodiments, the electrical equipment 3000 may also include a low-voltage power supply (not shown). The third connector 297 and the fourth connector 299 can be electrically connected to the low-voltage power supply so that the electric energy of the low-voltage power supply can be transmitted to the main positive relay 22 and the pre-filling relay 24, thereby ensuring the stable operation of the first module 20.

[0090] Since the main positive relay 22, fuse 23, pre-charge relay 24 and pre-charge resistor 25 are all accommodated in the main body 21 to jointly form the first module 20, in order to achieve the miniaturization of the first module 20, the main positive relay 22, fuse 23, pre-charge relay 24 and pre-charge resistor 25 are relatively close to each other. Therefore, when the first module 20 is working normally, the heat generated by the main positive relay 22, fuse 23, pre-charge relay 24 and pre-charge resistor 25 will affect each other, resulting in excessive local heat in the first module 20 and causing damage, such as causing the temperature of the fuse 23 to be too high and causing damage, affecting the service life of the electrical components. In the embodiment of the present application, the body 21 is provided with a plurality of through holes, which penetrate the body 21, and the plurality of through holes correspond to the fuse 23 and the pre-charging resistor 25, respectively, so that the heat generated by the main positive relay 22, the fuse 23, the pre-charging relay 24 and the pre-charging resistor 25 can be dissipated to the outside of the body 21 through the through holes, avoiding the continuous increase of heat in the body 21, which causes damage to the main positive relay 22, the fuse 23, the pre-charging relay 24 and the pre-charging resistor 25, and prolongs the service life of the first module 20. In addition, the setting of the body 21 can also prevent the heat generated by other electrical components (such as the main negative relay 33, etc.) from affecting the electrical components in the first module 20, thereby ensuring the normal operation of the first module 20.

[0091] See also Figure 2 , Figure 6 and Figure 7 In some embodiments, the main negative relay 33 is a relay with a normally closed contact. The main negative relay 33 can disconnect or connect the battery pack 1100 in the charge and discharge circuit 1200 of the battery pack 2000. For example, when the coil 335 of the main negative relay 33 is activated, the contact opens to cut off the output of the battery pack 1100. Therefore, the setting of the main negative relay 33 can protect the charge and discharge circuit 1200, thereby improving the working stability of the battery pack 2000.

[0092] In some embodiments, the main negative relay 33 further includes a first sub-section 338 and a second sub-section 339, wherein the coil 335 is accommodated in the first sub-section 338, and the first sub-section 338 is used to close the magnetic field generated by the coil 335 being energized; the connector 331 (including the first connector 3311 and the second connector 3313) is installed through the second sub-section 339, and the separator 333 is arranged between the first sub-section 338 and the second sub-section 339, and is connected to both the first sub-section 338 and the second sub-section 339. It should be noted that in some embodiments, the separator 333 and the first sub-section 338 and the second sub-section 339 can be connected by welding.

[0093] The current acquisition unit 35 is an electrical component with a current detection function. In the present application, the current acquisition unit 35 and the main negative relay 33 together form an integrated module (the second module 30), and together with the first module 20 form the charge and discharge circuit 1200 of the battery pack 1100. The current acquisition unit 35 can collect the current of the charge and discharge circuit 1200 of the battery pack 1100, thereby ensuring the current stability of the charge and discharge circuit 1200, which is beneficial to the stable operation of the battery pack 2000 and improves the safety of the battery pack 2000. It should be noted that in some embodiments, the current acquisition unit 35 includes but is not limited to a shunt, a Hall sensor, or other current sensors.

[0094] In some embodiments, the connector 331 includes a first connector 3311 and a second connector 3313, and the first connector 3311 and the second connector 3313 are spaced apart. The main negative relay 33 also includes a moving member 337, which is electrically connected to the coil 335 and can move between the coil 335 and the connector 331 to selectively open or close the electrical connection between the first connector 3311 and the second connector 3313.

[0095] Specifically, in some embodiments, when the coil 335 of the main negative relay 33 is activated, the movable member 337 can move toward the direction of the coil 335 to disconnect the electrical connection between the first connector 3311 and the second connector 3313, thereby disconnecting the output of the battery pack 1100; when the coil 335 of the main negative relay 33 is not activated, the movable member 337 can move toward the direction of the connector 331 (including the first connector 3311 and the second connector 3313) to connect the electrical connection between the first connector 3311 and the second connector 3313, thereby realizing the output of the battery pack 1100. Therefore, the setting of the main negative relay 33 can protect the charge and discharge circuit 1200, thereby improving the working stability of the battery pack 2000.

[0096] More specifically, in some embodiments, the second module 30 can be electrically connected to other electrical components through the first connector 3311 and the second connector 3313 to jointly form the charge and discharge circuit 1200 of the battery pack 1100. For example, the current generated by the battery pack 1100 can enter the second module 30 through one of the first connector 3311 and the second connector 3313, and flow out through the other of the first connector 3311 and the second connector 3313 after passing through the main negative relay 33, wherein the first connector 3311 and the second connector 3313 are both provided through the main body 31.

[0097] It should be noted that, in some embodiments, the first communicating vessel 3311 and the second communicating vessel 3313 are both installed on the same side wall of the main body 31. In other words, the first communicating vessel 3311 and the second communicating vessel 3313 are located on the same side of the main body 31. Compared with the first communicating vessel 3311 and the second communicating vessel 3313 being installed on different side walls, for example, the first communicating vessel 3311 is installed on the first side wall 311 of the main body 31, and the second communicating vessel 3313 is installed on the second side wall 313 of the main body 31 or the peripheral wall 315 of the main body 31, the first communicating vessel 3311 and the second communicating vessel 3313 are both installed on the same side wall of the main body 31. The same side wall installed on the main body 31 can reduce the size of the second module 30 in the height direction (i.e., the direction from the first side wall 311 of the main body 31 to the second side wall 313 of the main body 31, or the direction from the second side wall 313 of the main body 31 to the first side wall 311 of the main body 31), that is, reduce the overall size of the second module 30, thereby not only reducing the possibility of interference between the first connector 3311 and the second connector 3313 and other electrical components, but also realizing the miniaturization of the battery pack 2000; on the other hand, it can facilitate the electrical connection between the second module 30 and other electrical components, and improve the assembly efficiency of the BDU integrated structure. In the present application, the first connector 3311 and the second connector 3313 are both arranged on the first side wall 311 of the main body 31.

[0098] See also Figure 2 , Figure 6 and Figure 7 In some embodiments, the connector 331 includes a first peripheral wall 3315 opposite to the inner peripheral wall 3151 of the main body 31, and the moving member 337 includes a second peripheral wall 3371 opposite to the inner peripheral wall 3151 of the main body 31. The current collection unit 35 also includes a first circuit board 355, which is disposed on the first peripheral wall 3315 and electrically connected to the main body 351 and the first end 3531 of the electrical connector 353, and the electrical connector 353 is spaced from the second peripheral wall 3371. Thus, the electrical connector 353 can fully utilize the space in the height direction of the second module 30 in the accommodating cavity 301, thereby reducing the space occupied by the electrical connector 353 on the one hand, which is conducive to the miniaturization of the second module 30 and the battery pack 2000; on the other hand, it can reduce or even avoid interference between the electrical connector 353 and other structures in the second module 30 (such as the moving member 337, etc.), thereby ensuring the stability and reliability of the operation of the second module 30.

[0099] Specifically, in some embodiments, when the current generated by the battery pack 1100 enters the second module 30 through one of the first connector 3311 and the second connector 3313 and flows out through the other of the first connector 3311 and the second connector 3313, a pressure difference can be generated on the body 351, and the first circuit board 355 can obtain the pressure difference generated on the body 351 to obtain the current flowing through the first connector 3311 or the second connector 3313, and the first circuit board 355 can also transmit the obtained current information to the BMS 60 through the electrical connector 353 ( Figure 2 It should be noted that, in some embodiments, the body 131 may be a copper-manganese alloy, etc. The electrical connector 135 may be a pin header or a wiring harness, etc., which is not limited here.

[0100] See also Figure 2 , Figure 6 and Figure 7 In some embodiments, the current collection unit 35 may include a main body 351 of the current collection unit 35 and the first connector 3311 or the second connector 3313, thereby, the housing 10, the main negative relay 33 and the current collection unit 35 can form the second module 30 together. Specifically, the main body 351 can be sleeved on one of the first connector 3311 and the second connector 3313, the first circuit board 355 is electrically connected to the main body 351 and the first end 3531 of the electrical connector 353, and the second end 3533 of the electrical connector 353 is installed through the partition 333, thereby, the current collection unit 35 can collect the current information on the charge and discharge circuit 1200, and can transmit the collected current information to the BMS 60, so as to protect the charge and discharge circuit 1200 and ensure the stable operation of the battery pack 2000.

[0101] See also Figure 2 , Figure 8 and Fig. 9In other embodiments, the current collection unit 35 may include two, wherein the body 351 of one current collection unit 35 is electrically connected to the first connector 3311; the body 351 of the other current collection unit 35 is electrically connected to the second connector 3313, thereby, the main body 31, the main negative relay 33 and the two current collection units 35 can form the second module 30 together. Specifically, the two body parts 351 can be respectively sleeved on the first connector 3311 and the second connector 3313, the two first circuit boards 355 are respectively electrically connected to the two body parts 351 and the first ends 3531 of the two electrical connectors 353, the second ends 3533 of the two electrical connectors 353 are both penetrated and installed on the partition 333, and the second ends 3533 of the two electrical connectors 353 are spaced apart, thereby, in the case of damage to one current collection unit 35, the other current collection unit 35 can still work normally, thereby ensuring the stability of the operation of the second module 30.

[0102] In addition, the two current acquisition units 35 can respectively collect the current information flowing through the first communicating vessel 3311 and the second communicating vessel 3313 and transmit it to the BMS 60. When the BMS 60 obtains the current information collected by the two current acquisition units 35, the BMS 60 can compare and analyze the data collected by the two current acquisition units 35, thereby improving the accuracy of the current acquisition unit 35, thereby improving the safety of the charging and discharging circuit 1200 of the battery pack 1100, and meeting the requirements of the electrical equipment 3000 ( Figure 1 Safety performance requirements of ASIL C level in the Automotive Safety Integrity Level (ASIL) as shown in the figure.

[0103] Among them, the main body 351 is sleeved on the first connector 3311 and / or the second connector 3313, and the side of the main body 351 opposite to the first connector 3311 and / or the second connector 3313 is not in contact with other structures. Therefore, compared with the close fit between the main body 351 and other structures, the heat dissipation performance of the main body 351 is better, thereby preventing the current acquisition unit 35 from being damaged due to excessive temperature, and improving the accuracy of information acquisition by the current acquisition unit 35. In addition, compared with the traditional current acquisition unit 35 that needs to be electrically connected to other electrical components through electrical connectors such as copper bars, the current acquisition unit 35 in this embodiment can realize the collection of current information on the charge and discharge circuit 1200 without the need for electrical connectors such as copper bars. Therefore, on the one hand, the size of the second module 30 can be reduced, which is conducive to the miniaturization of the battery pack 2000; on the other hand, the production cost of the second module 30 can also be reduced.

[0104] In the related art, the main body is electrically connected to the main negative relay by a copper busbar, wherein the copper busbar needs to be connected and fixed to the terminal of the main negative relay by fasteners (such as bolts, etc.). At this time, most of the structures of the fasteners (such as bolt heads and gaskets, etc.) are located outside the main negative relay. Therefore, on the one hand, the user can directly contact the fasteners, thereby causing safety problems; on the other hand, the fasteners are prone to interfere with other structures, thereby affecting the normal assembly of the main negative relay and the current acquisition unit in the battery pack. In the embodiment of the present application, the main body 351 can be set to the first connector 3311 and / or the second connector 3313 by welding. Therefore, compared with the use of fasteners for connection and fixing, on the one hand, the safety of the second module 30 can be improved; on the other hand, the possibility of interference between the second module 30 and other structures can be reduced or even avoided, thereby ensuring the normal assembly of the second module 30.

[0105] See also Figure 2 , Figure 6 and Figure 7 ,and Figure 8 and Fig. 9 In some embodiments, the main body 31 further includes a plug-in portion 317 opposite to the current collection unit 35, and the plug-in portion 317 is disposed on the outer peripheral wall 3153 of the main body 31. The second module 30 further includes a wiring harness, one end of which is electrically connected to the BMS 60, and the other end of which is electrically connected to the second end 3533 of the electrical connector 353 through the plug-in portion 317.

[0106] Specifically, in some embodiments, when the main body 351 of the current collection unit 35 collects the current information flowing through the first connector 3311 and / or the second connector 3313, the first circuit board 355 can transmit the current information to the BMS 60 through the electrical connector 353 and the wiring harness, so that the BMS 60 controls the operation of the battery pack 2000 according to the current information, thereby improving the safety of the battery pack 2000. It should be noted that the quantitative relationship between the plug-in portion 317 and the current collection unit 35 is one-to-one, that is, one plug-in portion 317 corresponds to one current collection unit 35.

[0107] Please combine Figure 8 and Fig. 9In some embodiments, when the current collection unit 35 includes two, the plug-in parts 317 include two, and the two plug-in parts 317 are arranged on the same side wall of the main body 31. Therefore, compared with the two plug-in parts 317 being arranged on different side walls of the main body 31, the two plug-in parts 317 being arranged on the same side wall of the main body 31 can reduce the overall size of the second module 30 on the one hand, thereby not only reducing the possibility of interference between the plug-in parts 317 and other electrical components, but also realizing the miniaturization of the battery pack 2000; on the other hand, it can facilitate the electrical connection between the plug-in parts 317 and the wiring harness, and improve the assembly efficiency of the power distribution device 1000. In the present application, the two plug-in parts 317 can be arranged on the same side of the peripheral wall 315 of the main body 31.

[0108] In some embodiments, the second module 30 further includes a low-voltage connector 37, which is electrically connected to the coil 335 of the main negative relay 33 and passes through the main body 31. Specifically, in some embodiments, the low-voltage connector 37 can be electrically connected to a low-voltage power supply (not shown) so that the electric energy of the low-voltage power supply can be transmitted to the coil 335 of the main negative relay 33, thereby ensuring the stable operation of the main negative relay 33.

[0109] See also Figure 2 and Figure 3 In some embodiments, the functional module 100 further includes a heating module 40, which is disposed in the housing 10 and is electrically connected to the second module 30 and the first module 20. The heating module 40 includes a heating shell 41, a heating relay 43 and a heating fuse 45. The heating shell 41 is provided with an accommodating space, and the heating relay 43 and the heating fuse 45 are both disposed in the accommodating space. Specifically, in some embodiments, the BMS 60 is electrically connected to the heating module 40, and the BMS 60 can also control the operation of the heating module 40. Among them, the BMS 60 can be electrically connected to the heating module 40 by means of a copper bus, a wiring harness or an electrical connecting piece, so that the BMS 60 can control the working state of the heating module 40 (for example, power on or power off, etc.), thereby controlling the operation of the battery pack 2000.

[0110] Furthermore, in some embodiments, the battery pack 2000 may also include a heating element 1300, which can be electrically connected to the heating module 40, so that the BMS 60 can control the normal operation of the heating element 1300 through the heating module 40, so that the battery pack 1100 is always at a suitable operating temperature, preventing the temperature from being too low to affect the working performance of the battery pack 1100 or even causing damage to the battery pack 1100, thereby improving the stability and safety of the battery pack 1100 and extending the service life of the battery pack 1100. It should be noted that in some embodiments, the heating element 1300 can be a heating element such as a heating film.

[0111] In certain embodiments, the heating relay 43 and the heating fuse 45 may together form an integrated module structure (heating module 40). Thus, compared with the heating relay 43 and the heating fuse 45 being independent components, the integrated heating relay 43 and the heating fuse 45 occupy a smaller space, thereby being able to improve the working stability of the battery pack 2000 while also improving the utilization rate of the internal space of the battery pack 2000, thereby achieving miniaturization of the battery pack 2000.

[0112] Please continue reading Figure 2 and Figure 3 In some embodiments, the functional module 100 further includes a connecting copper bar 50, which includes a positive copper bar 51, a positive output copper bar 52, a negative copper bar 53, a negative output copper bar 54, a third copper bar 55, and a fourth copper bar 56. The positive copper bar 51 and the positive output copper bar 52 are electrically connected to the first connector 26 and the second connector 27, respectively; the negative copper bar 53 and the negative output copper bar 54 are both electrically connected to the connecting vessel 331 (including the first connecting vessel 3311 and the second connecting vessel 3313); one end of the third copper bar 55 is electrically connected to the heating module 40 of the functional module 100, and the other end is electrically connected to the positive output copper bar 52; one end of the fourth copper bar 56 is electrically connected to the heating module 40, and the other end is electrically connected to the negative output copper bar 54.

[0113] Specifically, in some embodiments, one end of the positive copper busbar 51 is electrically connected to the second connector 27, and the other end is electrically connected to the positive electrode of the battery pack 1100; one end of the positive output copper busbar 52 is electrically connected to the first connector 26, and the other end is electrically connected to the first connector 1400 or the second connector 1500 of the battery pack 2000; one end of the negative copper busbar 53 is electrically connected to the first connector 3311, and the other end is electrically connected to the negative electrode of the battery pack 1100; one end of the negative output copper busbar 54 is electrically connected to the second connector 3313, and the other end is electrically connected to the first connector 1400 or the second connector 1500 of the battery pack 2000, thereby enabling the first module 20 and the second module 30 to jointly form the main circuit of the charge and discharge circuit 1200. In addition, one end of the third copper busbar 55 is electrically connected to the heating module 40 of the functional module 100, and the other end is electrically connected to the positive output copper busbar 52; one end of the fourth copper busbar 56 is electrically connected to the heating module 40, and the other end is electrically connected to the negative output copper busbar 54, thereby enabling the heating module 40 to constitute a heating circuit of the charge and discharge circuit 1200, and the heating circuit is electrically connected to the main circuit.

[0114] See also Figure 2 , Fig.10 and Fig.11In some embodiments, the power distribution device 1000 further includes a fast charging module 200, which is disposed outside the housing 10 and electrically connected to the functional module 100. The fast charging module 200 and the functional module 100 are used together to control the operation of the battery pack 2000. The fast charging module 200 includes a fast charging housing 210, a fast charging fuse 220, a first relay 230, a second relay 240 and a second circuit board 250. The fast charging fuse 220, the first relay 230 and the second relay 240 are arranged side by side and are all installed on the fast charging housing 210. The fast charging fuse 220 is electrically connected to the first relay 230, and the first relay 230 and the second relay 240 are both electrically connected to the second circuit board 250. It should be noted that, in some embodiments, the fast charging fuse 220 is electrically connected to the first relay 230, and the first relay 230 and the second relay 240 are both electrically connected to the second circuit board 250, so that the fast charging fuse 220, the first relay 230 and the second relay 240 can jointly form a fast charging circuit 1600, and the fast charging circuit 1600 can be electrically connected to the main circuit of the charging and discharging circuit 1200 (for example, the fast charging circuit 1600 is connected in parallel with the main circuit).

[0115] In some embodiments, the fast charge fuse 220, the first relay 230 and the second relay 240 can be arranged on the fast charge housing 210 in a detachable connection manner, so that they can be easily removed for repair or replacement when the fast charge fuse 220, the first relay 230 or the second relay 240 is damaged. Among them, the detachable connection method includes but is not limited to a snap connection or a threaded connection. In other embodiments, the fast charge fuse 220, the first relay 230 and the second relay 240 can be arranged on the fast charge housing 210 in a non-detachable connection manner, thereby improving the structural stability of the fast charge module 200 and preventing the fast charge module 200 from being damaged when the electrical equipment 3000 ( Figure 1 As shown in the figure, the fast charge fuse 220, the first relay 230 or the second relay 240 shakes and falls off during operation, thereby improving the working stability of the battery pack 2000. Among them, the non-detachable connection method includes but is not limited to bonding or welding.

[0116] In the embodiment of the present application, the fast charge fuse 220 can protect the fast charge circuit 1600, thereby ensuring the normal operation of the battery pack 2000. Among them, the first relay 230 and the second relay 240 are relays with normally open contacts, and the first relay 230 and the second relay 240 can jointly control the fast charge current (such as low voltage and large current or high voltage and small current, etc.) to enter the battery pack 1100 to achieve the fast charge function. Among them, the first relay 230 can be electrically connected to the fast charge fuse 220, and jointly connected to the main circuit of the charge and discharge circuit 1200 at a position close to the positive electrode of the battery pack 1100, and the second relay 240 can be connected to the charge and discharge circuit 1200 at a position close to the negative electrode of the battery pack 1100, thereby, the first relay 230, the second relay 240 and the fast charge fuse 220 can enable the battery pack 1100 to have a fast charge function. For example, when the fast charge circuit 1600 and the charge and discharge circuit 1200 are both turned on, the fast charge current can enter the positive electrode of the battery pack 1100 through the first relay 230 and the fast charge fuse 220, and flow out of the negative electrode of the battery pack 1100 through the second relay 240. It should be noted that in some embodiments, the first relay 230 and the second relay 240 may be a DC relay or an AC relay. The embodiment of the present application is only described by taking the first relay 230 and the second relay 240 as a DC relay as an example.

[0117] In some embodiments, the first relay 230 can be electrically connected to the fast charge fuse 220 using electrical connectors such as a wiring harness or a copper busbar. For example, when the first relay 230 is electrically connected to the fast charge fuse 220 using a copper busbar, the copper busbar can be connected and fixed to the terminal of the first relay 230 using fasteners (such as bolts, etc.). For another example, when the first relay 230 is electrically connected to the fast charge fuse 220 using a copper busbar, the copper busbar can be electrically connected to the first relay 230 by welding. Therefore, compared with the use of fasteners for connection and fixation, the use of welding can reduce or even avoid the possibility of interference between the fast charge module 200 and other structures, thereby ensuring the normal assembly of the fast charge module 200.

[0118] See also Fig.10 and Fig.11 In some embodiments, the first relay 230 and the second relay 240 are both provided with a plug 260, and the plug 260 is used to be electrically connected to the second circuit board 250, so that the second circuit board 250 can control the operation of the first relay 230 and the second relay 240, and obtain the operation information (such as the operation voltage or the operation current, etc.) of the first relay 230 and the second relay 240. Figure 2 As shown in the figure, it can be electrically connected to the second circuit board 250, so that the BMS60 can obtain the working information of the fast charging module 200 through the second circuit board 250.

[0119] Specifically, in some embodiments, the plug 260 can be electrically connected to the conductive terminal (not shown) on the second circuit board 250 by welding, plugging or abutting, so as to realize the electrical connection between the first relay 230 and the second relay 240 and the second circuit board 250. It should be noted that in some embodiments, the plug 260 and the conductive terminal can be made of conductive materials, and the conductive materials are not limited to metals, graphite, conductive polymers, oxides or carbon nanotubes. Among them, metals include but are not limited to copper, aluminum, silver, gold and nickel; oxides include but are not limited to copper oxide, zinc oxide and magnesium oxide. Therefore, when the plug 260 and the conductive terminal are in contact, the plug 260 and the conductive terminal can be electrically connected.

[0120] In some embodiments, the second circuit board 250 may include a single-layer board, a double-layer board, and a multi-layer board. It is understandable that since the second circuit board 250 of the fast charging module 200 is only electrically connected to the first relay 230 and the second relay 240, the second circuit board 250 of the fast charging module 200 can be a single-layer board, thereby simplifying the manufacturing process of the second circuit board 250 and reducing the production cost of the fast charging module 200.

[0121] In addition, since the first relay 230 and the second relay 240 are arranged side by side, that is, the first relay 230 and the second relay 240 are arranged together and close to each other, wherein the fast charging fuse 220 can be arranged on the side of the first relay 230 away from the second relay 240, thereby, compared with the first relay 230 and the second relay 240 being arranged at intervals, for example, the fast charging fuse 220 is arranged between the first relay 230 and the second relay 240, the size of the second circuit board 250 is smaller, thereby on the one hand, it can further reduce the production cost of the second circuit board 250, that is, reduce the production cost of the fast charging module 200; on the other hand, it can be conducive to the miniaturization of the fast charging module 200, thereby improving the space utilization inside the battery pack 2000.

[0122] See also Figure 1 and Figure 2 In some embodiments, the battery pack 2000 may further include a first connector 1400 and a second connector 1500. It should be noted that in some embodiments, the first connector 1400 and the second connector 1500 may be circular connectors or rectangular connectors.

[0123] Specifically, in some embodiments, when the first connector 1400 is electrically connected to the charge-discharge circuit 1200, the battery pack 2000 can have a slow charge function; when the second connector 1500 is electrically connected to the charge-discharge circuit 1200 through the fast charge circuit 1600, the battery pack 2000 can have a fast charge function. In addition, the battery pack 2000 can also be electrically connected to the motor 3200 through the first connector 1400, so that the battery pack 2000 (battery group 1100) can provide electric energy to the motor 3200, thereby converting the electric energy into mechanical energy through the motor 3200 to drive the electric device 3000 to operate, so as to achieve stable control of the electric device 3000.

[0124] In some embodiments, first connector 1400 and second connector 1500 are arranged side by side, that is, first connector 1400 and second connector 1500 can be arranged on the same side of battery pack 2000. Compared with the case where first connector 1400 and second connector 1500 are arranged on different sides of battery pack 2000, first connector 1400 and second connector 1500 in this embodiment can not only be easily connected to an external device, thereby facilitating user operation, but also reduce the possibility of interference between first connector 1400 and second connector 1500 and other electrical components when connected to an external device, thereby ensuring the stability and reliability of battery pack 2000.

[0125] In summary, please refer to Figure 2 and Fig.10 In some embodiments, during operation of the battery pack 2000, the current flow may be as follows:

[0126] The battery pack 2000 is in the pre-power-on process: when the BMS60 receives the pre-power-on information, the BMS60 controls the low-voltage power supply to transmit electric energy to the pre-charge relay 24 of the first module 20, so that the pre-charge relay 24 starts to work. Specifically, first, the current generated by the battery pack 1100 can flow out to the load (such as the motor 3200, etc.) after passing through the fuse 23, the pre-charge relay 24, the pre-charge resistor 25 and the first connector 1400 of the first module 20, and then the current can flow back to the battery pack 1100 through the main negative relay 33 and the current acquisition unit 35 of the second module 30, wherein, when the current flows through the main negative relay 33 and the current acquisition unit 35, the current acquisition unit 35 can collect current information;

[0127] The battery pack 2000 is in the pre-power-on and power-off process: when the BMS 60 receives the pre-power-on completion information, the BMS 60 controls the low-voltage power supply to transmit power to the main positive relay 22 of the first module 20, so that the main positive relay 22 starts to work, and controls the low-voltage power supply to stop supplying power to the pre-charge relay 24, so that the pre-charge relay 24 stops working;

[0128] The battery pack 2000 is in the discharge process: the current generated by the battery pack 1100 flows out to the load through the fuse 23, the main positive relay 22 and the first connector 1400, and then the current can flow back to the battery pack 1100 through the main negative relay 33 and the current acquisition unit 35, wherein the current acquisition unit 35 can collect current information when the current flows through the main negative relay 33 and the current acquisition unit 35;

[0129] The battery pack 2000 is in the charging process (slow charging): the current can flow into the charging and discharging circuit 1200 through the first connector 1400, and flow into the battery pack 1100 through the main positive relay 22 and the fuse 23, and then the current can flow out through the main negative relay 33 and the current acquisition unit 35, wherein, when the current flows through the main negative relay 33 and the current acquisition unit 35, the current acquisition unit 35 can collect current information;

[0130] The battery pack 2000 is in the charging process (fast charging): the current can flow into the fast charging circuit 1600 through the second connector 1500, and flow into the battery pack 1100 after passing through the first relay 230, the fast charging fuse 220, the main positive relay 22 and the fuse 23 in sequence, and then the current can flow out through the main negative relay 33, the current acquisition unit 35 and the second relay 240. Among them, when the current flows through the main negative relay 33 and the current acquisition unit 35, the current acquisition unit 35 can collect current information.

[0131] It should be noted that the current flow of the battery pack 2000 during operation in the above-mentioned embodiment is only an example description, and the current flow of the battery pack 2000 during operation may also be other different embodiments, which will not be explained one by one here.

[0132] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification. At the same time, other implementation methods can be derived from the above-mentioned embodiments, so that structural and logical replacements and changes can be made without departing from the scope of this disclosure.

[0133] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A functional module, applied to a power distribution device, characterized in that: include: case; a first module, the first module is arranged in the shell and is used to be electrically connected to the battery pack of the battery pack, the first module includes a body, a main positive relay, a fuse, a pre-charge relay and a pre-charge resistor, the body is provided with a receiving cavity, the main positive relay, the fuse, the pre-charge relay and the pre-charge resistor are electrically connected and are arranged in the receiving cavity, the main positive relay is electrically connected to a first connector, the fuse is electrically connected to a second connector, and the first connector and the second connector are both passed through the body; and The second module is arranged in the shell and is used to be electrically connected to the battery pack. The second module includes a main body, a main negative relay and at least one current collection unit. The main body is provided with a accommodating cavity. The main negative relay and the current collection unit are both arranged in the accommodating cavity. The main negative relay includes a communicating vessel, a partition and a coil. The communicating vessel passes through the shell. The partition is arranged between the communicating vessel and the coil. The current collection unit includes a main body and an electrical connector. The main body is sleeved on the communicating vessel. The first end of the electrical connector is electrically connected to the main body. The second end of the electrical connector is passed through and installed on the partition. The first connector and the second connector are both electrically connected to the communicating vessel, so that the second module is electrically connected to the first module.

2. The functional module according to claim 1, characterized in that: One end of the fuse is electrically connected to the main positive relay through a first copper busbar, and the other end is electrically connected to the second connector through a second copper busbar. The main positive relay includes a first end and a second end opposite to each other. The first connector and the first copper busbar are both electrically connected to the first end of the main positive relay. The pre-charging relay is electrically connected to the first connector and the pre-charging resistor, and the pre-charging resistor is electrically connected to the first copper busbar.

3. The functional module according to claim 2, characterized in that: The distance between the first end of the main positive relay and the side of the first copper busbar facing away from the first end of the main positive relay is smaller than the distance between the first end of the main positive relay and the side of the first connector facing away from the first end of the main positive relay.

4. The functional module according to claim 2, characterized in that: The first copper busbar is provided with a connector; the first module further includes: a first wiring harness, the first wiring harness electrically connecting the pre-charging relay and the pre-charging resistor; a second wiring harness, one end of which is electrically connected to the first connector, and the other end of which is electrically connected to the pre-charge relay; and A third wiring harness, one end of which is electrically connected to the first copper busbar through the connector, and the other end of which is electrically connected to the pre-charging resistor.

5. The functional module according to claim 1, characterized in that: The body includes a first side wall and a second side wall opposite to each other, and a peripheral wall located between the first side wall and the second side wall. The first side wall, the second side wall and the peripheral wall together form a receiving cavity. The first connector and the second connector are both arranged through the first side wall.

6. The functional module according to claim 1, characterized in that: The first module also includes: a third connector, the third connector being electrically connected to the main positive relay and passing through the body; and A fourth connector, the fourth connector is electrically connected to the pre-charging relay and passes through the main body, and the third connector and the fourth connector are both low-voltage connectors.

7. The functional module according to claim 1, characterized in that: The communicating vessel comprises a first communicating vessel and a second communicating vessel, wherein the first communicating vessel and the second communicating vessel are arranged at intervals; The main negative relay also includes: A moving member is electrically connected to the coil, and the moving member can move between the coil and the communicating vessel to selectively open or close the electrical connection between the first communicating vessel and the second communicating vessel.

8. The functional module according to claim 7, characterized in that: The communicating vessel comprises a first peripheral wall opposite to the inner peripheral wall of the main body, and the moving member comprises a second peripheral wall opposite to the inner peripheral wall of the main body; The current collection unit also includes: A first circuit board is disposed on the first peripheral wall and is electrically connected to the main body and the first end of the electrical connector. The electrical connector is spaced apart from the second peripheral wall.

9. The functional module according to claim 7, characterized in that: The current collection unit comprises one, the main body of the current collection unit is electrically connected to the first communicating vessel or the second communicating vessel; or The current collection units include two, wherein the main body of one of the current collection units is electrically connected to the first communicating vessel; and the main body of the other current collection unit is electrically connected to the second communicating vessel.

10. The functional module according to claim 1, characterized in that: The main body also includes a plug-in portion opposite to the current collection unit, and the plug-in portion is arranged on the outer peripheral wall of the main body; the second module also includes a wiring harness, one end of which is electrically connected to the battery management system, and the other end is electrically connected to the second end of the electrical connector through the plug-in portion.

11. The functional module according to claim 10, characterized in that: In the case where the current collection units include two, the plug-in parts include two, and the two plug-in parts are arranged on the same side of the main body.

12. The functional module according to claim 1, characterized in that: The functional module also includes: A heating module is arranged in the shell and is electrically connected to the second module and the first module. The heating module includes a heating shell, a heating relay and a heating fuse. The heating shell is provided with a accommodating space. The heating relay and the heating fuse are both arranged in the accommodating space.

13. The functional module according to claim 1, characterized in that: The functional module further includes a connecting copper bar, and the connecting copper bar includes a positive copper bar, a positive output copper bar, a negative copper bar, a negative output copper bar, a third copper bar and a fourth copper bar; The positive copper busbar and the positive output copper busbar are electrically connected to the first connector and the second connector respectively; the negative copper busbar and the negative output copper busbar are both electrically connected to the communicating vessel; one end of the third copper busbar is electrically connected to the heating module of the functional module, and the other end is electrically connected to the positive output copper busbar; one end of the fourth copper busbar is electrically connected to the heating module, and the other end is electrically connected to the negative output copper busbar.

14. The functional module according to claim 1, characterized in that: The functional module also includes: A battery management system is arranged in the shell and is electrically connected to the first module, the second module and the heating module of the functional module. The battery management system is used to control the operation of the first module, the second module and the heating module.

15. A power distribution device for a battery pack, characterized in that: include: The functional module according to any one of claims 1 to 14; and A fast charging module, wherein the fast charging module is arranged outside the shell and is electrically connected to the functional module, and the fast charging module and the functional module are used together to control the operation of the battery pack.

16. The power distribution device according to claim 15, characterized in that: The fast charging module includes a fast charging shell, a fast charging fuse, a first relay, a second relay and a second circuit board. The fast charging fuse, the first relay and the second relay are arranged side by side and are all installed on the fast charging shell. The fast charging fuse is electrically connected to the first relay, and the first relay and the second relay are both electrically connected to the second circuit board.

17. The power distribution device according to claim 16, characterized in that: The first relay and the second relay are both provided with plug-ins, and the plug-ins are used to be electrically connected to the second circuit board.

18. The power distribution device according to claim 16, characterized in that: The second circuit board is a single-layer board.

19. A battery pack, characterized in that: include: Battery pack; and The power distribution device according to any one of claims 15 to 18, wherein the power distribution device is electrically connected to the battery pack, and the power distribution device is used to control the charging and discharging of the battery pack.

20. The battery pack according to claim 19, characterized in that: The battery pack further comprises: a first connector electrically connected to the functional module; and A second connector, wherein the second connector is electrically connected to the fast charging module of the power distribution device.

21. An electrical equipment, characterized in that: include: The battery pack according to claim 19 or 20.

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