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

Abstract

The utility model discloses an integrated module, a power distribution device, a battery pack and electric equipment. The integrated module comprises a shell, a main positive relay, a fuse, a pre-charging relay and a pre-charging resistor. The shell is provided with an accommodating cavity, and the main positive relay, the fuse, the pre-charging relay and the pre-charging resistor are all arranged in the accommodating cavity and are all used for being connected with a main negative relay and a current acquisition unit of the power distribution device. The main positive relay is electrically connected with a first connector, the first connector penetrates through the shell, the fuse is electrically connected with a second connector, the second connector penetrates through the shell, one end of the fuse is electrically connected with the main positive relay through a first electric connecting piece, and the other end of the fuse is electrically connected with the second connector through a second electric connecting piece. The main positive relay comprises a first end and a second end which are opposite to each other, the first connector and the first electric connecting piece are electrically connected with the first end of the main positive relay, the pre-charging relay is electrically connected with the first connector and the pre-charging resistor, and the pre-charging resistor is electrically connected with the first electric connecting piece.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to an integrated 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. Generally, the power distribution device includes electrical components such as the main positive relay, fuse, pre-charge relay, pre-charge resistor and current collection element. However, these electrical components are independent components and occupy a large space when installed inside the battery pack, which affects the miniaturization of the battery pack. Utility Model Content

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

[0004] The integrated module of certain embodiments of the present application is applied to a power distribution device, and the integrated module includes a housing, a main positive relay, a fuse, a pre-filling relay and a pre-filling resistor. The housing is provided with a receiving cavity, and the main positive relay, the fuse, the pre-filling relay and the pre-filling resistor are all arranged in the receiving cavity, and are all used to be electrically connected to the main negative relay and the current acquisition unit of the power distribution device. The main positive relay is electrically connected to a first connector, and the first connector passes through the housing. The fuse is electrically connected to a second connector, and the second connector passes through the housing. One end of the fuse is electrically connected to the main positive relay through a first electrical connector, and the other end is electrically connected to the second connector through a second electrical connector. The main positive relay includes a first end and a second end opposite to each other, and the first connector and the first electrical connector are both electrically connected to the first end of the main positive relay. The pre-filling relay is electrically connected to the first connector and the pre-filling resistor, and the pre-filling resistor is electrically connected to the first electrical connector.

[0005] In some embodiments, the distance between the side of the first electrical connector facing away from the first end of the main positive relay and the first end of the main positive relay is smaller than the distance between the side of the first connector facing away from the first end of the main positive relay and the first end of the main positive relay.

[0006] In some embodiments, a connector is provided on the first electrical connector. The integrated 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 electrical connector through the connector, and the other end is electrically connected to the pre-charging resistor.

[0007] In some embodiments, the shell 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 receiving cavity; the first connector and the second connector are both arranged through the first side wall.

[0008] In some embodiments, the main positive relay and the pre-charging relay are respectively arranged at opposite ends of the accommodating cavity, the fuse and the pre-charging resistor are stacked and arranged between the main positive relay and the pre-charging relay, and the fuse is closer to the first side wall than the pre-charging resistor.

[0009] In some embodiments, the shell is provided with a plurality of through holes, the through holes passing through the shell, and the plurality of through holes respectively correspond to the fuse and the pre-charging resistor.

[0010] In some embodiments, the integrated module further includes a third connector and a fourth connector. The third connector is electrically connected to the main positive relay and passes through the housing. The fourth connector is electrically connected to the pre-charge relay and passes through the housing, and both the third connector and the fourth connector are low-voltage connectors.

[0011] In some embodiments, the shell further includes a mounting portion, wherein the mounting portion extends from an outer peripheral wall of the shell toward a direction away from the shell, and the mounting portion is used for mounting the shell on a battery pack.

[0012] The power distribution device of the battery pack of certain embodiments of the present application includes a main negative relay, a current acquisition unit and an integrated module as described in any of the above embodiments. The main negative relay, the current acquisition unit and the integrated module are all electrically connected and jointly control the operation of the battery pack.

[0013] In some embodiments, the power distribution device also includes a battery management system (BMS), which is electrically connected to the main negative relay, the current acquisition unit and the integrated module, and the battery management system is used to control the operation of the main negative relay, the current acquisition unit and the integrated module.

[0014] 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.

[0015] The electrical equipment of certain embodiments of the present application includes the battery pack described in the above embodiments.

[0016] In the integrated module, power distribution device, battery pack and electrical equipment of the embodiments of the present application, the main positive relay, fuse, pre-charging relay and pre-charging resistor are all accommodated in the shell, and one end of the fuse is electrically connected to the main positive relay through a first electrical connector, and the other end is electrically connected to the second connector through a second electrical connector, 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 electrical connector. Therefore, compared with the traditional main positive relay, fuse, pre-charging relay and pre-charging resistor as independent components, the main positive relay, fuse, pre-charging relay and pre-charging resistor can be installed in the battery pack as a whole, so that the space occupied by the main positive relay, fuse, pre-charging relay and pre-charging resistor is smaller, thereby improving the utilization of the internal space of the battery pack and realizing the miniaturization of the battery pack.

[0017] 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

[0018] 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:

[0019] Figure 1 It is a schematic diagram of the structure of an electrical device in some embodiments of the present application;

[0020] Figure 2 is a circuit diagram of a battery pack according to certain embodiments of the present application;

[0021] Figure 3 yes Figure 1 A schematic diagram of the three-dimensional structure of an integrated module of a battery pack in an electrical device shown;

[0022] Figure 4 yes Figure 1 A three-dimensional exploded schematic diagram of the integrated module of the battery pack in the electrical equipment shown.

[0023] Description of main component symbols:

[0024] 2000, electrical equipment, 2100, vehicle body;

[0025] 1000, battery pack; 100, power distribution device; 200, battery pack; 300, charging and discharging circuit;

[0026] 10. integrated module; 11. housing; 110. receiving cavity; 111. first side wall; 113. second side wall; 115. peripheral wall; 1151. peripheral wall; 116. mounting portion; 117. through hole; 12. main positive relay; 121. first end of main positive relay; 123. second end of main positive relay; 13. fuse; 131. first end of fuse; 133. second end of fuse; 141. first electrical connector; 1411. connector; 143. second electrical connector; 15. pre-charge relay; 16. pre-charge resistor; 17. first connector; 18. second connector; 191. first wiring harness; 193. second wiring harness; 195. third wiring harness; 197. third connector; 199. fourth connector;

[0027] 20. Main negative relay; 30. Current acquisition unit; 40. Battery management system. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] See also Figure 1 , the electric device 2000 of certain embodiments of the present application includes a battery pack 1000. The electric device 2000 includes but is not limited to vehicles, energy storage cabinets or aircraft. Specifically, in certain embodiments, when the electric device 2000 includes a vehicle, the vehicle includes a body 2100, and the battery pack 1000 is installed in the body 2100. The battery pack 1000 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.

[0035] Among them, since the electric device 2000 in this embodiment includes the battery pack 1000, it can be understood that the electric device 2000 also includes at least the same beneficial effects as the battery pack 1000. Therefore, for the beneficial effects of the electric device 2000, please refer to the beneficial effects of the battery pack 1000 described below.

[0036] Please continue reading Figure 1 The battery pack 1000 of some embodiments of the present application includes a battery pack 200 and a power distribution device 100. The power distribution device 100 is electrically connected to the battery pack 200, and the power distribution device 100 is used to control the charging and discharging of the battery pack 200.

[0037] The power distribution device 100 is disposed in the battery pack 1000 and is electrically connected to the battery group 200. Thus, the power distribution device 100 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 200, thereby improving the stability of the battery pack 1000 in supplying power to the power-consuming device 2000 and ensuring the stable operation of the power-consuming device 2000. It is understandable that the power distribution device 100 can be designed to match the different power-consuming devices 2000 to meet the use requirements of different power-consuming devices 2000.

[0038] In some embodiments, the battery pack 1000 may include at least one battery pack 200, wherein the number of battery packs 200 in the battery pack 1000 may be adjusted according to different application scenarios of the battery pack 1000. Further, the battery pack 200 may include multiple batteries, and the number of batteries in the battery pack 200 may be adjusted according to the application scenario and capacity of the battery pack 200. It should be noted that in some embodiments, the multiple batteries in the battery pack 200 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 1000 in this embodiment includes a power distribution device 100 and at least one battery pack 200, it can be understood that the battery pack 1000 at least also includes the same beneficial effects as the power distribution device 100 and the battery pack 200. Therefore, for the beneficial effects of the battery pack 1000, please refer to the beneficial effects of the power distribution device 100 below.

[0039] See also Figure 1 and Figure 2 The power distribution device 100 of the battery pack in some embodiments of the present application includes an integrated module 10, a main negative relay 20 and a current acquisition unit 30. The main negative relay 20, the current acquisition unit 30 and the integrated module 10 are electrically connected and jointly control the operation of the battery pack 1000. It should be noted that in some embodiments, the power distribution device 100 may include but is not limited to a battery pack disconnect unit (Battery Disconnect Unit, BDU) and a high-voltage power distribution unit (Power Distribution Unit, PDU).

[0040] Specifically, please combine Figure 3 and Figure 4In some embodiments, the integrated module 10 includes a housing 11, a main positive relay 12, a fuse 13, a pre-charge relay 15, and a pre-charge resistor 16. The housing 11 is provided with a receiving cavity 110, and the main positive relay 12, the fuse 13, the pre-charge relay 15, and the pre-charge resistor 16 are all arranged in the receiving cavity 110, and are all used to connect with the main negative relay 20 and the current acquisition unit 30 of the power distribution device 100. The main positive relay 12 is electrically connected to a first connector 17, which passes through the housing 11. The fuse 13 is electrically connected to a second connector 18, which passes through the housing 11. One end of the fuse 13 is electrically connected to the main positive relay 12 through a first electrical connector 141, and the other end is electrically connected to the second connector 18 through a second electrical connector 143. The main positive relay 12 includes a first end 121 and a second end 123 opposite to each other. The first connector 17 and the first electrical connector 141 are both electrically connected to the first end 121 of the main positive relay 12. The pre-charge relay 15 is electrically connected to the first connector 17 and the pre-charge resistor 16, and the pre-charge resistor 16 is electrically connected to the first electrical connector 141. It should be noted that in some embodiments, the integrated module 10 can select the main positive relay 12, fuse 13, pre-charge relay 15 and pre-charge resistor 16 with different parameters according to the use requirements of the battery pack 1000, thereby improving the applicability of the integrated module 10. Among them, the first connector 17 and the second connector 18 are both high-voltage connectors.

[0041] It is understandable that, in some embodiments, the first electrical connector 141 includes but is not limited to a copper bar, a wiring harness or an electrical connection piece, that is, a copper bar, a wiring harness or an electrical connection piece can be used to electrically connect one end of the fuse 13 and the main positive relay 12. In the embodiment of the present application, only the first electrical connector 141 is a copper bar as an example for description. The second electrical connector 143 includes but is not limited to a copper bar, a wiring harness or an electrical connection piece, that is, a copper bar, a wiring harness or an electrical connection piece can be used to electrically connect the other end of the fuse 13 and the second connector 18. In the embodiment of the present application, only the second electrical connector 143 is a copper bar as an example for description.

[0042] Among them, the housing 11 refers to a component that can isolate the main positive relay 12, the fuse 13, the pre-charge relay 15 and the pre-charge resistor 16 from the external environment. The housing 11 can be made of one or more insulating materials such as plastic, rubber, glass or ceramic. Therefore, the setting of the housing 11 can prevent the operator from directly contacting the main positive relay 12, the fuse 13, the pre-charge relay 15 and the pre-charge resistor 16, thereby improving the safety performance of the integrated module 10; on the other hand, it can reduce or even avoid the influence of other electrical components (such as the main negative relay 20 or the current acquisition unit 30, etc.) in the power distribution device 100 on the integrated module 10, for example, avoiding electromagnetic interference of other electrical components to the integrated module 10, which causes the integrated module 10 to fail to work normally, thereby improving the working stability of the integrated module 10.

[0043] A relay is an electrical component that turns on or off a controlled circuit when an input quantity (such as voltage, current or temperature) reaches a specified value. In the present application, the relay includes a main positive relay 12, which is a relay with a normally open contact. The main positive relay 12 can connect or disconnect the battery pack 200 in the charge and discharge circuit 300 of the battery pack 1000. For example, when the coil of the main positive relay 12 is activated, the contact is closed to turn on the charge and discharge circuit 300 of the battery pack 200, and when the input quantity reaches a specified value, the contact is disconnected to disconnect the charge and discharge circuit 300 of the battery pack 200. Therefore, the setting of the main positive relay 12 can protect the charge and discharge circuit 300, thereby improving the working stability of the battery pack 1000.

[0044] The fuse 13 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 present application, the first end 121 of the main positive relay 12 is electrically connected to the first connector 17, and the first end 121 of the main positive relay 12 is electrically connected to the fuse 13 through the first electrical connector 141, and the other end of the fuse 13 is electrically connected to the second connector 18, so that the main positive relay 12 and the fuse 13 can be electrically connected and connected together to the position of the charging and discharging circuit 300 of the battery pack 200 close to the positive electrode of the battery pack 200, so as to protect the charging and discharging circuit 300, thereby improving the working stability of the battery pack 1000.

[0045] The pre-charge relay 15 is an electrical component that can open and close the pre-charge circuit and protect the electrical components and the charge-discharge circuit 300 from large current shocks through the pre-charge resistor. In the present application, the pre-charge relay 15 can be electrically connected to the main positive relay 12 and the fuse 13 in parallel. Thus, the setting of the pre-charge relay 15 can prevent the electrical components and the charge-discharge circuit 300 in the battery pack 1000 from being damaged, and improve the working stability of the battery pack 1000.

[0046] The pre-charging resistor 16 is an electrical component that can limit the output current of the battery pack 200. In the present application, the pre-charging resistor 16 is connected in series with the pre-charging relay 15, and the pre-charging resistor 16 and the pre-charging relay 15 are electrically connected in parallel with the main positive relay 12 and the fuse 13. Therefore, the setting of the pre-charging resistor 16 can prevent the electrical components and the charging and discharging circuit 300 in the battery pack 1000 from being damaged, and further improve the working stability of the battery pack 1000.

[0047] Specifically, in some embodiments, the integrated module 10 can be electrically connected to other electrical components through the first connector 17 and the second connector 18 to jointly form a charge and discharge circuit 300 of the battery pack 200. For example, the current generated by the battery pack 200 can enter the main positive relay 12 through the first connector 17, and flow into the fuse 13 through the copper busbar (first electrical connector 141) between the main positive relay 12 and the fuse 13, and then flow out through the second connector 18 electrically connected to the fuse 13.

[0048] 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 present application, the first electrical connector 141 is electrically connected to the first end 121 of the main positive relay 12 by welding. Therefore, compared with the use of fasteners for connection and fixing, on the one hand, it can improve the safety of the integrated module 10; on the other hand, it can reduce or even avoid the possibility of interference between the integrated module 10 and other structures, thereby ensuring the normal assembly of the integrated module 10.

[0049] In addition, the first electrical connector 141 can be accommodated in the accommodating cavity 110, thereby reducing the size of the integrated module formed by the main positive relay 12 and the fuse 13, that is, the overall size of the integrated module 10 formed by the shell 11, the main positive relay 12, the fuse 13, the pre-charge relay 15 and the pre-charge resistor 16 is smaller, which is conducive to the miniaturization of the battery pack 1000.

[0050] In some embodiments, the distance between the side of the first electrical connector 141 facing away from the first end 121 of the main positive relay 12 and the first end 121 of the main positive relay 12 is smaller than the distance between the side of the first connector 17 facing away from the first end 121 of the main positive relay 12 and the first end 121 of the main positive relay 12. This can reduce the space occupied by the first electrical connector 141 and the fuse 13 in the direction from the first end 121 of the relay 12 to the second end 123 of the relay 12, thereby facilitating the miniaturization of the integrated module 10 and the battery pack 1000.

[0051] In the integrated module 10 of the power distribution device 100 of the embodiment of the present application, the main positive relay 12, the fuse 13, the pre-charging relay 15 and the pre-charging resistor 16 are all accommodated in the shell 11, and one end of the fuse 13 is electrically connected to the main positive relay 12 through the first electrical connector 141, and the other end is electrically connected to the second connector 18 through the second electrical connector 143, the pre-charging relay 15 is electrically connected to the first connector 17 and the pre-charging resistor 16, and the pre-charging resistor 16 is electrically connected to the first electrical connector 141. Therefore, compared with the traditional main positive relay, fuse, pre-charging relay and pre-charging resistor as independent components, the main positive relay 12, fuse 13, pre-charging relay 15 and pre-charging resistor 16 can be installed as a whole in the battery pack 1000, so that the space occupied by the main positive relay 12, fuse 13, pre-charging relay 15 and pre-charging resistor 16 is smaller, thereby improving the utilization rate of the internal space of the battery pack 1000, and thus realizing the miniaturization of the battery pack 1000.

[0052] In addition, the first electrical connector 141 and the first connector 17 are both electrically connected to the first end 121 of the main positive relay 12. Therefore, compared with the traditional main positive relay including two terminals (i.e., connectors), the main positive relay 12 in the present application only needs to be provided with one terminal (i.e., the first connector 17), thereby reducing the production cost of the main positive relay 12.

[0053] In addition, the housing 11, the main positive relay 12, the fuse 13, the pre-charging relay 15 and the pre-charging resistor 16 together form an integrated module structure, which can also simplify the number of cables in the power distribution device, thereby simplifying the line structure of the charging and discharging circuit 300 and reducing the failure rate.

[0054] See also Figure 2 and Figure 4In some embodiments, the relay may further include a main negative relay 20, which is a relay with a normally closed contact. The main negative relay 20 can disconnect or connect the battery pack 200 in the charge and discharge circuit 300 of the battery pack 1000. For example, when the coil of the main negative relay 20 is activated, the contact opens to cut off the output of the battery pack 200. Therefore, the setting of the main negative relay 20 can protect the charge and discharge circuit 300, thereby improving the working stability of the battery pack 1000.

[0055] The current acquisition unit 30 is an electrical component with a current detection function. In the present application, the current acquisition unit 30 can form a charge and discharge circuit 300 of the battery pack 200 together with the integrated module 10 and the main negative relay 20, and the current acquisition unit 30 can collect the current of the charge and discharge circuit 300 of the battery pack 200, thereby ensuring the current stability of the charge and discharge circuit 300, which is beneficial to the stable operation of the battery pack 1000 and improves the safety of the battery pack 1000. It should be noted that in some embodiments, the current acquisition unit 30 includes but is not limited to other current sensors such as shunts and Hall sensors.

[0056] Please continue reading Figure 2 and Figure 4 In some embodiments, the power distribution device 100 further includes a BMS 40, which is electrically connected to the main negative relay 20, the current acquisition unit 30 and the integrated module 10, and is used to control the operation of the main negative relay 20, the current acquisition unit 30 and the integrated module 10. Specifically, in this embodiment, compared with the BMS 40 being arranged outside the power distribution device 100, the BMS 40 being integrated into the power distribution device 100 can improve the utilization rate of the internal space of the power distribution device 100, realize the miniaturization of the power distribution device 100, and thus realize the miniaturization of the battery pack 1000.

[0057] Specifically, in some embodiments, the BMS 40 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 both integrated in the BMS 40 .

[0058] Among them, HVSU is an electrical component with functions such as current sampling, total 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 300 of the battery pack 200; BMC is a system that monitors the current, voltage and temperature and other parameters of the battery pack 200 in real time, and provides data acquisition, data processing, communication and control functions. In this application, BMC is responsible for real-time monitoring and control of the battery pack 200, and can promptly detect and handle abnormal conditions of the battery. HVSU is responsible for monitoring and protecting the high-voltage part of the battery pack 200 to prevent overvoltage, undervoltage and other conditions. Therefore, HVSU and BMC are integrated in BMS40 to improve the reliability and safety of the battery pack 1000 and extend the service life of the battery pack 1000. In addition, compared with the independent settings of HVSU and BMC, the BMS40 of this embodiment does not need to set up additional interfaces and connecting lines. On the one hand, it can reduce the complexity of the BMS40 line, reduce the failure risk of BMS40, and ensure the normal operation of the battery pack 1000; on the other hand, when the BMS40 is integrated in the power distribution device 100, the size of the power distribution device 100 is smaller, thereby enabling the miniaturization of the battery pack 1000.

[0059] In addition, BMS40 can be electrically connected to the integrated module 10, the main negative relay 20 and the current acquisition unit 30 through copper busbars, wiring harnesses or electrical connecting plates. Thus, BMS40 can control the working status of the integrated module 10, the main negative relay 20 and the current acquisition unit 30 (for example, power on or power off, etc.), thereby controlling the operation of the battery pack 1000.

[0060] See also Figure 3 and Figure 4In some embodiments, the housing 11 includes a first side wall 111, a second side wall 113 and a peripheral wall 115 located between the first side wall 111 and the second side wall 113. The first side wall 111, the second side wall 113 and the peripheral wall 115 are combined to form a receiving cavity 110. The main positive relay 12 and the fuse 13 are both received in the receiving cavity 110, so that the housing 11, the main positive relay 12, the fuse 13, the pre-charge relay 15 and the pre-charge resistor 16 can form an integrated module. Among them, the receiving cavity 110 may include a variety of different shapes and sizes. For example, the receiving cavity 110 may be a rectangular parallelepiped, a cylindrical shape or a hexagonal prism shape, etc. It can be understood that in some embodiments, the shape of the receiving cavity 110 can be determined according to the shape and size of the main positive relay 12, the fuse 13, the pre-charge relay 15 and the pre-charge resistor 16. It can be understood that all structures in the integrated module 10 except the first connector 17 and the second connector 18 are housed in the shell 11. Therefore, on the one hand, the protection effect of the shell 11 on its internal electrical components (including the main positive relay 12, the fuse 13, the pre-charge relay 15 and the pre-charge resistor 16) can be further enhanced to ensure the working stability of the integrated module 10; on the other hand, the possibility of direct contact between the operator and the electrical components inside the shell 11 can be reduced as much as possible, thereby improving the safety performance of the integrated module 10.

[0061] In some embodiments, the first connector 17 and the second connector 18 are both installed on the same side wall of the shell 11. In other words, the first connector 17 and the second connector 18 are located on the same side of the shell 11. Compared with the first connector 17 and the second connector 18 being installed on different side walls of the shell 11, for example, the first connector 17 is installed on the first side wall 111 of the shell 11, and the second connector 18 is installed on the second side wall 113 or the peripheral wall 115. The first connector 17 and the second connector 18 are both installed on the same side wall of the shell 11. On the one hand, the size of the integrated module 10 in the length direction (i.e., the direction from the first side wall 111 to the second side wall 113, or the direction from the second side wall 113 to the first side wall 111) can be reduced, that is, the overall size of the integrated module 10 can be reduced, thereby not only reducing the possibility of interference between the first connector 17 and the second connector 18 and other electrical components, but also realizing the battery pack 1000 ( Figure 1 On the other hand, it can facilitate the electrical connection between the integrated module 10 and other electrical components, thereby improving the assembly efficiency of the power distribution device 100. In the present application, the first connector 16 and the second connector 17 are both disposed through the first side wall 111.

[0062] In some embodiments, the main positive relay 12, the fuse 13, the pre-charge relay 15 and the pre-charge resistor 16 can be installed in the receiving cavity 110 by welding, bonding, snap connection or threaded connection. On the one hand, this can improve the structural stability of the integrated module 10 and prevent the electrical components in the receiving cavity 110 from shaking, which may cause the electrical connection between the integrated module 10 and other electrical components to fail, thereby improving the working stability of the battery pack 1000; on the other hand, compared with setting various assembly structures on the shell 11 to install the main positive relay 12, the fuse 13, the pre-charge relay 15 and the pre-charge resistor 16, the structure of the shell 11 in this embodiment is simpler, which is not only conducive to improving the production efficiency of the shell 11, but also can improve the utilization rate of the internal space of the shell 11, thereby realizing the miniaturization of the integrated module 10.

[0063] In addition, in some embodiments, the main positive relay 12, the fuse 13, the pre-charge relay 15 and the pre-charge resistor 16 can be installed in the housing 11 in a stacked manner. Therefore, compared with the main positive relay 12, the fuse 13, the pre-charge relay 15 and the pre-charge resistor 16 being installed in the housing 11 in a flat manner, the internal space of the housing 11 is fully utilized, which is conducive to the miniaturization of the integrated module 10. In the present application, the main positive relay 12 and the pre-charge relay 15 are respectively arranged at opposite ends of the accommodating cavity 110, the fuse 13 and the pre-charge resistor 16 are stacked and arranged between the main positive relay 12 and the pre-charge relay 15, and the fuse 13 is closer to the first side wall 111 than the pre-charge resistor 16.

[0064] If the main positive relay 12 or other electrical components in the integrated module 10 are installed on the battery pack 1000 by bonding or other non-detachable connection methods, then when the main positive relay 12 is damaged and needs to be replaced, the entire power distribution device 100 or even the entire battery pack 1000 needs to be replaced, resulting in a high cost of use of the electrical equipment 2000. Figure 2 , Figure 3 and Figure 4 In the embodiment of the present application, the housing 11 may further include a mounting portion 116, which extends from the outer peripheral wall 1151 of the housing 11 in a direction away from the housing 11, and the mounting portion 116 is used for mounting the housing 11 on the battery pack 1000. Specifically, the operator can detachably mount the housing 11 in the battery pack 1000 through fasteners (such as bolts, etc.) or connecting elements such as snaps. Therefore, when it is necessary to replace the main positive relay 12 or other electrical components in the integrated module 10, the operator only needs to remove the integrated module 10 from the battery pack 1000 for replacement, without replacing the entire power distribution device 100 or even the entire battery pack 1000, thereby reducing the use cost of the electrical equipment 2000.

[0065] In certain embodiments, the fuse 13 includes a first end 131 and a second end 133 relative to each other. The first end 131 of the fuse 13 is electrically connected to the main positive relay 12 via a first electrical connector 141, and the second end 133 of the fuse 13 is electrically connected to the second connector 18 via a second electrical connector 143. Thus, an electrical connection can be formed between the first connector 17 and the second connector 18, so that the integrated module 10 can be electrically connected to other electrical components via the first connector 17 and the second connector 18 to jointly form a charging and discharging circuit of the battery pack 200.

[0066] In some embodiments, a connector 1411 is provided on the first electrical connector 141. The integrated module 10 may also include a first wiring harness 191, a second wiring harness 193, and a third wiring harness 195. The first wiring harness 191 is electrically connected to the pre-charge relay 15 and the pre-charge resistor 16. One end of the second wiring harness 193 is electrically connected to the first connector 17, and the other end is electrically connected to the pre-charge relay 15. One end of the third wiring harness 195 is electrically connected to the first electrical connector 141 through a connector 1411, and the other end is electrically connected to the pre-charge resistor 16, thereby enabling the pre-charge resistor 16 to be connected in series with the pre-charge relay 15, and the pre-charge resistor 16 and the pre-charge relay 15 are electrically connected in parallel with the main positive relay 12 and the fuse 13.

[0067] It should be noted that, in some embodiments, the connector 1411 may be a welding point, that is, one end of the third wiring harness 195 may be connected to the first electrical connector 141 by welding, thereby, one end of the third wiring harness 195 may be electrically connected to the first end 131 of the fuse 13. Compared with the use of fasteners (such as bolts, etc.) to connect to the first electrical connector 141, the integrated module formed by the third wiring harness 195, the main positive relay 12 and the fuse 13 in this embodiment is smaller in size, which is conducive to the miniaturization of the battery pack 1000. In addition, the third wiring harness 195 can be accommodated in the accommodating cavity 110, thereby, on the one hand, the possibility of direct contact between the operator and the third wiring harness 195 can be reduced as much as possible, thereby improving the safety of the integrated module 10; on the other hand, it can reduce or even avoid the interference of the third wiring harness 195 with other structures, ensuring the normal assembly of the integrated module 10.

[0068] In some embodiments, the integrated module 10 further includes a third connector 197 and a fourth connector 199. The third connector 197 is electrically connected to the main positive relay 12 and is passed through the housing 11. The fourth connector 199 is electrically connected to the pre-filling relay 15 and is passed through the housing 11. The third connector 197 and the fourth connector 199 are both low-voltage connectors. Specifically, in some embodiments, the electrical device 2000 may also include a low-voltage power supply (not shown). The third connector 197 and the fourth connector 199 can be electrically connected to the low-voltage power supply so that the electrical energy of the low-voltage power supply can be transmitted to the main positive relay 12 and the pre-filling relay 15, thereby ensuring the stable operation of the integrated module 10.

[0069] See also Figure 2 and Figure 4 In some embodiments, during operation of the battery pack 1000, the current flow may be as follows:

[0070] The battery pack 1000 is in the pre-power-on process: when the BMS 40 receives the pre-power-on information, the BMS 40 controls the low-voltage power supply to transmit electric energy to the pre-charge relay 15 in the integrated module 10, so that the pre-charge relay 15 starts to work. Specifically, first, the current generated by the battery pack 200 can enter the fuse 13 in the integrated module 10 through the second connector 18, and flow out to the load after passing through the fuse 13, the third wiring harness 195, the pre-charge resistor 16, the first wiring harness 191, the pre-charge relay 15, the second wiring harness 193 and the first connector 17, and then the current can flow back to the battery pack 200 through the current acquisition unit 30 and the main negative relay 20;

[0071] The battery pack 1000 is in the pre-power-on and power-off process: when the BMS 40 receives the pre-power-on completion information, the BMS 40 controls the low-voltage power supply to transmit power to the main positive relay 12, so that the main positive relay 12 starts to work, and controls the low-voltage power supply to stop supplying power to the pre-charge relay 15, so that the pre-charge relay 15 stops working;

[0072] The battery pack 1000 is in the discharge process: the current generated by the battery pack 200 enters the fuse 13 of the integrated module 10 through the second connector 18, and flows out to the load after passing through the copper busbar (first electrical connector 141), the main positive relay 12 and the first connector 17, and then the current can flow back to the battery pack 200 through the current acquisition unit 30 and the main negative relay 20;

[0073] The battery pack 1000 is in the charging process: the current can enter the main positive relay 12 of the integrated module 10 through the first connector 17, and flow out to the battery pack 200 after passing through the copper bus (first electrical connector 141), the fuse 13 and the second connector 18, and then the current can flow out through the main negative relay 20 and the current acquisition unit 30.

[0074] It should be noted that the current flow of the battery pack 1000 during operation in the above-mentioned embodiment is only an example description, and the current flow of the battery pack 1000 during operation may also be other different embodiments, which will not be explained one by one here.

[0075] Since the main positive relay 12, fuse 13, pre-charge relay 15 and pre-charge resistor 16 are all housed in the housing 11 to form an integrated module 10, in order to achieve miniaturization of the integrated module 10, the main positive relay 12, fuse 13, pre-charge relay 15 and pre-charge resistor 16 are relatively close to each other. Therefore, when the integrated module 10 is working normally, the heat generated by the main positive relay 12, fuse 13, pre-charge relay 15 and pre-charge resistor 16 will affect each other, resulting in excessive local heat in the integrated module 10 and causing damage, such as causing the temperature of the fuse 13 to be too high and causing damage, affecting the service life of the electrical components. Please refer to Figure 4 In the embodiment of the present application, the housing 11 is provided with a plurality of through holes 117, which penetrate the housing 11, and the plurality of through holes 117 correspond to the fuse 13 and the pre-charging resistor 16, respectively. Thus, the heat generated by the main positive relay 12, the fuse 13, the pre-charging relay 15 and the pre-charging resistor 16 can be dissipated to the outside of the housing 11 through the through holes 117, thereby preventing the main positive relay 12, the fuse 13, the pre-charging relay 15 and the pre-charging resistor 16 from being damaged due to the continuous increase of heat in the housing 11, thereby extending the service life of the integrated module 10. In addition, the setting of the housing 11 can also prevent the heat generated by other electrical components (such as the main negative relay 20, etc.) from affecting the electrical components in the integrated module 10, thereby ensuring the normal operation of the integrated module 10.

[0076] It should be noted that, in some embodiments, the cross-sectional shape of the through hole 117 may be a regular shape or an irregular shape such as a circle, a square, a racetrack shape, and an ellipse, and is not limited here. The number of through holes 117 includes a plurality, and a plurality of through holes 117 are arranged at intervals in the housing 11. It should be noted that, in some embodiments, the through hole 117 may penetrate at least one of the first side wall 111, the second side wall 113, and the peripheral wall 115 and correspond to at least part of the main positive relay 12, the fuse 13, the pre-charge relay 15, and the pre-charge resistor 16.

[0077] 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.

[0078] 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. An integrated module, applied to a power distribution device, characterized in that: It includes a shell, a main positive relay, a fuse, a pre-charge relay and a pre-charge resistor. The shell is provided with a receiving cavity. The main positive relay, the fuse, the pre-charge relay and the pre-charge resistor are all arranged in the receiving cavity and are used to connect with the main negative relay and the current acquisition unit of the power distribution device; The main positive relay is electrically connected to a first connector, which passes through the shell; the fuse is electrically connected to a second connector, which passes through the shell; one end of the fuse is electrically connected to the main positive relay through a first electrical connector, and the other end is electrically connected to the second connector through a second electrical connector; the main positive relay includes a first end and a second end opposite to each other, the first connector and the first electrical connector 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 electrical connector.

2. The integrated module according to claim 1, characterized in that: The distance between the first end of the main positive relay and the side of the first electrical connector 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.

3. The integrated module according to claim 1, characterized in that: The first electrical connector is provided with a connector; the integrated module further comprises: 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 electrical connector via the connector, and the other end of which is electrically connected to the pre-charging resistor.

4. The integrated module according to claim 1, characterized in that: The shell 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.

5. The integrated module according to claim 4, characterized in that: The main positive relay and the pre-charging relay are respectively arranged at opposite ends of the accommodating cavity, the fuse and the pre-charging resistor are stacked and arranged between the main positive relay and the pre-charging relay, and the fuse is closer to the first side wall than the pre-charging resistor.

6. The integrated module according to claim 1, characterized in that: The shell is provided with a plurality of through holes, and the through holes penetrate the shell. The plurality of through holes correspond to the fuse and the pre-charging resistor respectively.

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

8. The integrated module according to claim 1, characterized in that: The shell further includes a mounting portion, which extends from an outer peripheral wall of the shell toward a direction away from the shell, and the mounting portion is used for the shell to be mounted on a battery pack.

9. A power distribution device for a battery pack, characterized in that: It comprises a main negative relay, a current acquisition unit and an integrated module as described in any one of claims 1 to 8, wherein the main negative relay, the current acquisition unit and the integrated module are electrically connected and jointly control the operation of the battery pack.

10. The power distribution device according to claim 9, characterized in that: The power distribution device also includes: A battery management system, wherein the battery management system is electrically connected to the main negative relay, the current acquisition unit and the integrated module, and the battery management system is used to control the operation of the main negative relay, the current acquisition unit and the integrated module.

11. A battery pack, characterized in that: include: Battery pack; and The power distribution device according to claim 9 or 10, 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.

12. An electrical equipment, characterized in that: include: The battery pack according to claim 11.

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