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 negative relay and at least one current acquisition unit. The shell is provided with an accommodating cavity. The main negative relay is arranged in the containing cavity, the main negative relay is used for being connected with a battery management system of the power distribution device and comprises a connector, a separator and a coil, the connector penetrates through the shell, and the separator is arranged between the connector and the coil. The current collection unit is arranged in the containing cavity, the current collection unit is used for being connected with the battery management system, the current collection unit comprises a body part and an electric connecting piece, the connector is sleeved with the body part, the body part is electrically connected with the connector, the first end of the electric connecting piece is electrically connected with the body part, and the second end of the electric connecting piece is installed on the partition piece in a penetrating mode. In the application, the current acquisition unit does not need to be electrically connected with the connector through a copper bar, so that the space occupied by the main negative relay and the current acquisition unit can be reduced, and the utilization rate of the internal space of the battery pack is improved.

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 switch the circuit on and off 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, main negative relay and current acquisition unit. Generally, the current acquisition unit needs to be connected to the terminal of the main negative relay through a copper busbar, which will cause the main negative relay and the current acquisition unit to occupy a larger space size, that is, the space size occupied by installing them inside the battery pack is larger, thereby affecting 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 negative relay and at least one current acquisition unit. The housing is provided with a receiving cavity. The main negative relay is arranged in the receiving cavity, and the main negative relay is used to connect to the battery management system of the power distribution device. The main negative relay includes a connector, a separator and a coil. The connector passes through the housing, and the separator is arranged between the connector and the coil. The current acquisition unit is arranged in the receiving cavity, and the current acquisition unit is used to connect to the battery management system. The current acquisition unit includes a main body and an electrical connector. The main body is sleeved on the connector and electrically connected to the connector. The first end of the electrical connector is electrically connected to the main body, and the second end of the electrical connector is passed through and installed on the separator.

[0005] In some embodiments, the connector includes a first connector and a second connector, and the first connector and the second connector 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 connector to selectively conduct or disconnect the electrical connection between the first connector and the second connector.

[0006] In some embodiments, the housing includes a first side wall, a second side wall 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 connector includes a first peripheral wall opposite to the inner peripheral wall of the housing, and the moving member includes a second peripheral wall opposite to the inner peripheral wall of the housing. The current collection unit also includes a circuit board, the circuit board is arranged 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.

[0007] In some embodiments, the current collection unit includes one, and the main body of the current collection unit is electrically connected to the first connector or the second connector.

[0008] In some embodiments, the current collection unit includes two units, wherein the body of one of the current collection units is electrically connected to the first connector; and the body of the other current collection unit is electrically connected to the second connector.

[0009] In some embodiments, the shell 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 shell; the integrated 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.

[0010] 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 housing.

[0011] In some embodiments, the integrated module further includes a low voltage connector, which is electrically connected to the coil and passes through the housing.

[0012] 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.

[0013] The power distribution device of the battery pack of certain embodiments of the present application includes the integrated module and the battery management system (BMS) described in any of the above embodiments. The integrated module is used to control the operation of the battery pack. The BMS is electrically connected to the integrated module and is used to control the operation of the integrated module.

[0014] In certain embodiments, the power distribution device further includes an integrated module, wherein the integrated module is used to control the operation of the battery pack, the integrated module is electrically connected to the BMS, and the battery management system is used to control the operation of the integrated module.

[0015] 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.

[0016] The electrical equipment of certain embodiments of the present application includes the battery pack described in the above embodiments.

[0017] In the integrated module, power distribution device, battery pack and electrical equipment of the embodiments of the present application, the main negative relay and at least one current collection unit are arranged in the accommodating cavity, and the main body of the current collection unit is sleeved on the connector. Therefore, compared with the traditional current collection unit electrically connected to the connector of the main negative relay through the copper busbar, the main body of the current collection unit in the present application does not need to be electrically connected to the connector through the copper busbar, and the first end of the electrical connector is electrically connected to the main body, and the second end of the electrical connector is installed through the partition, so that the main negative relay and the current collection unit can be integrated. On the one hand, it can simplify the structure of the current collection unit, reduce the space occupied by the main negative relay and the current collection unit, improve the utilization rate of the internal space of the battery pack, and facilitate the miniaturization of the battery pack; on the other hand, it can ensure the stability and reliability of the operation of the main negative relay and the current collection unit.

[0018] 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

[0019] 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:

[0020] Figure 1 It is a schematic diagram of the structure of an electrical device in some embodiments of the present application;

[0021] Figure 2 is a circuit diagram of a battery pack according to certain embodiments of the present application;

[0022] Figure 3 yes Figure 1 A schematic diagram of a three-dimensional structure of an embodiment of an integrated module of a battery pack in an electrical device is shown;

[0023] Figure 4 yes Figure 3 A three-dimensional exploded schematic diagram of the integrated module shown;

[0024] Figure 5 yes Figure 1 A schematic three-dimensional structure diagram of another embodiment of an integrated module of a battery pack in an electrical device is shown;

[0025] Figure 6 yes Figure 5 A three-dimensional exploded schematic diagram of the integrated module shown.

[0026] Description of main component symbols:

[0027] 2000, electrical equipment, 2100, vehicle body;

[0028] 1000, battery pack; 100, power distribution device; 200, battery pack; 300, charging and discharging circuit;

[0029] 10. Integrated module;

[0030] 11. housing; 110. accommodating cavity; 111. first side wall; 113. second side wall; 115. peripheral wall; 1151. inner peripheral wall; 1153. outer peripheral wall; 117. mounting portion; 119. plug-in portion;

[0031] 12, main negative relay; 121, connector; 1211, first connector; 1213, second connector; 1215, first peripheral wall; 123, partition; 125, coil; 126, moving part; 1261, second peripheral wall; 127, first sub-unit; 128, second sub-unit;

[0032] 13. Current collection unit; 131. Main body; 133. Circuit board; 135. Electrical connector; 1351. First end of the electrical connector; 1353. Second end of the electrical connector;

[0033] 16. Low voltage connector;

[0034] 20. Integrated module; 21. Fuse; 23. Main positive relay; 25. Pre-charge module; 251. Pre-charge relay; 253. Pre-charge resistor; 30. Battery management system. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] 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.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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 and a BMS 30, and the integrated module 10 is used to control the operation of the battery pack 1000. The BMS 30 is electrically connected to the integrated module 10 and is used to control the operation of the integrated module 10. It should be noted that, in some embodiments, the power distribution device 100 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).

[0047] Specifically, please combine Figures 3 to 6 In some embodiments, the integrated module 10 includes a housing 11, a main negative relay 12 and at least one current collection unit 13. The housing 11 is provided with a housing chamber 110. The main negative relay 12 is disposed in the housing chamber 110. The main negative relay 12 is used to connect to the battery management system 30 of the power distribution device 100. The main negative relay 12 includes a connector 121, a separator 123 and a coil 125. The connector 121 passes through the housing 11. The separator 123 is disposed between the connector 121 and the coil 125. The current collection unit 13 is disposed in the housing chamber 110. The current collection unit 13 is used to connect to the battery management system 30. The current collection unit 13 includes a body 131 and an electrical connector 135. The body 131 is sleeved on the connector 121 and electrically connected to the connector 121. The first end 1351 of the electrical connector 135 is electrically connected to the body 131. The second end 1353 of the electrical connector 135 is installed on the separator 123. It should be noted that, in some embodiments, the connector 121 may be a high-voltage connector.

[0048] Among them, the housing 11 refers to an element that can separate the main negative relay 12 and the current acquisition unit 13 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 provide installation space for the main negative relay 12 and the current acquisition unit 13 on the one hand; on the other hand, it can prevent the operator from directly contacting the main negative relay 12 and the current acquisition unit 13, thereby improving the safety performance of the integrated module 10. In the embodiment of the present application, 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, and the first side wall 111, the second side wall 113 and the peripheral wall 115 together form a housing chamber 110. Among them, the housing chamber 110 may include a variety of different shapes and sizes, for example, the housing chamber 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 housing chamber 110 can be determined according to the shape and size of the main negative relay 12 and the current acquisition unit 13. It can be understood that all structures in the integrated module 10 except the connector 121 are accommodated in the shell 11. Therefore, on the one hand, the protection effect of the shell 11 on its internal electrical components (including the main negative relay 12 and the current acquisition unit 13) 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.

[0049] A relay is an electrical component that turns on or off a controlled circuit when an input quantity (such as voltage and current) reaches a specified value. In the present application, the relay includes a main negative relay 12, which is a relay with a normally closed contact. The main negative relay 12 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 125 of the main negative relay 12 is activated, the contact opens to cut off the output of the battery pack 200. Therefore, the setting of the main negative relay 12 can protect the charge and discharge circuit 300, thereby improving the working stability of the battery pack 1000.

[0050] In some embodiments, the main negative relay 12 further includes a first sub-section 127 and a second sub-section 124, wherein the coil 125 is contained in the first sub-section 127, and the first sub-section 127 is used to close the magnetic field generated by the coil 123 being energized; the connector 121 (including the first connector 1211 and the second connector 1213) is installed through the second sub-section 124, and the separator 123 is disposed between the first sub-section 127 and the second sub-section 124, and is connected to both the first sub-section 127 and the second sub-section 124. It should be noted that in some embodiments, the separator 123 and the first sub-section 127 and the second sub-section 124 can be connected by welding.

[0051] The current acquisition unit 13 is an electrical component with a current detection function. In the present application, the current acquisition unit 13 and the main negative relay 12 form an integrated module 10 together, and form a charge and discharge circuit 300 of the battery pack 200 together with the integrated module 20 (including the fuse 21, the main positive relay 23 and the pre-charge module 25). The current acquisition unit 13 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 13 includes but is not limited to a shunt, a Hall sensor or other current sensors.

[0052] See also Figures 3 to 6 In some embodiments, the connector 121 includes a first connector 1211 and a second connector 1213, and the first connector 1211 and the second connector 1213 are spaced apart. The main negative relay 12 also includes a moving member 126, which is electrically connected to the coil 125, and the moving member 126 can move between the coil 125 and the connector 121 to selectively connect or disconnect the electrical connection between the first connector 1211 and the second connector 1213.

[0053] Specifically, please combine Figure 2 In some embodiments, when the coil 125 of the main negative relay 12 is activated, the movable member 126 can move toward the direction of the coil 125 to disconnect the electrical connection between the first connector 1211 and the second connector 1213, thereby disconnecting the output of the battery pack 200; when the coil 125 of the main negative relay 12 is not activated, the movable member 126 can move toward the direction of the connector 121 (including the first connector 1211 and the second connector 1213) to connect the electrical connection between the first connector 1211 and the second connector 1213, thereby realizing the output of the battery pack 200. Therefore, the setting of the main negative relay 12 can protect the charge and discharge circuit 300, thereby improving the working stability of the battery pack 1000.

[0054] More specifically, in some embodiments, the integrated module 10 can be electrically connected to other electrical components (including but not limited to the fuse 21, the main positive relay 23 and the pre-charge module 25) through the first connector 1211 and the second connector 1213 to jointly form the charge and discharge circuit 300 of the battery pack 200. For example, the current generated by the battery pack 200 can enter the interior of the integrated module 10 through one of the first connector 1211 and the second connector 1213, and flow out through the other of the first connector 1211 and the second connector 1213 after passing through the main negative relay 12, wherein the first connector 1211 and the second connector 1213 are both provided through the housing 11.

[0055] It should be noted that, in some embodiments, the first connector 1211 and the second connector 1213 are both installed on the same side wall of the housing 11. In other words, the first connector 1211 and the second connector 1213 are located on the same side of the housing 11. Compared with the first connector 1211 and the second connector 1213 being installed on different side walls, for example, the first connector 1211 is installed on the first side wall 111 of the housing 11, and the second connector 1213 is installed on the second side wall 113 or the peripheral wall 115, the first connector 1211 and the second connector 1213 are installed on the same side wall of the housing 11. 3 are both installed on the same side wall of the housing 11. On the one hand, the size of the integrated module 10 in the height 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 1211 and the second connector 1213 and other electrical components, but also realizing the miniaturization of the battery pack 1000; on the other hand, it can facilitate the electrical connection between the integrated module 10 and other electrical components, and improve the assembly efficiency of the power distribution device 100. In the present application, the first connector 1211 and the second connector 1213 are both installed on the first side wall 111.

[0056] In some embodiments, the connector 121 includes a first circumferential wall 1215 opposite to the inner circumferential wall 1151 of the housing 11 , and the moving member 126 includes a second circumferential wall 1261 opposite to the inner circumferential wall 1151 of the housing 11 . The current collection unit 13 also includes a circuit board 133, which is arranged on the first peripheral wall 1215 and is electrically connected to the main body 131 and the first end 1351 of the electrical connector 135. The electrical connector 135 is spaced from the second peripheral wall 1261. Therefore, the electrical connector 135 can fully utilize the space in the height direction of the integrated module 10 (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) in the accommodating cavity 110. On the one hand, it can reduce the space size occupied by the electrical connector 135, which is beneficial to the miniaturization of the integrated module 10 and the battery pack 1000; on the other hand, it can reduce or even avoid interference between the electrical connector 135 and other structures in the integrated module 10 (such as the moving part 136, etc.), thereby ensuring the stability and reliability of the operation of the integrated module 10.

[0057] Specifically, in some embodiments, when the current generated by the battery pack 200 enters the integrated module 10 through one of the first connector 1211 and the second connector 1213 and flows out through the other of the first connector 1211 and the second connector 1213, a pressure difference can be generated on the body 131, and the circuit board 133 can obtain the pressure difference generated on the body 131 to obtain the current flowing through the first connector 1211 or the second connector 1213, and the circuit board 133 can also transmit the obtained current information to the BMS 30 through the electrical connector 135 ( 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.

[0058] See also Figure 2 , Figure 5 and Figure 6In some embodiments, the current collection unit 13 may include a main body 131 of the current collection unit 13 that is electrically connected to the first connector 1211 or the second connector 1213, whereby the housing 11, the main negative relay 12, and a current collection unit 13 can together form an integrated module 10. Specifically, the main body 131 can be sleeved on one of the first connector 1211 and the second connector 1213, the circuit board 133 is electrically connected to the main body 131 and the first end 1351 of the electrical connector 135, and the second end 1353 of the electrical connector 135 is installed through the partition 123, whereby the current collection unit 13 can collect current information on the charge and discharge circuit 300, and can transmit the collected current information to the BMS 30, thereby protecting the charge and discharge circuit 300 and ensuring the stable operation of the battery pack 1000.

[0059] See also Figure 2 , Figure 3 and Figure 4 In other embodiments, the current collection unit 13 may include two, wherein the body 131 of one current collection unit 13 is electrically connected to the first connector 1211; the body 131 of the other current collection unit 13 is electrically connected to the second connector 1213, thereby, the housing 11, the main negative relay 12 and the two current collection units 13 can form an integrated module 10 together. Specifically, the two body parts 131 can be respectively sleeved on the first connector 1211 and the second connector 1213, the two circuit boards 133 are respectively electrically connected to the two body parts 131 and the first ends 1351 of the two electrical connectors 135, the second ends 1353 of the two electrical connectors 135 are both penetrated and installed on the partition 123, and the second ends 1353 of the two electrical connectors 135 are spaced apart, thereby, in the case of damage to one current collection unit 13, the other current collection unit 13 can still work normally, thereby ensuring the stability of the operation of the integrated module 10.

[0060] In addition, the two current acquisition units 13 can respectively collect the current information flowing through the first connector 1211 and the second connector 1213 and transmit it to the BMS30. When the BMS30 obtains the current information collected by the two current acquisition units 13, the BMS30 can compare and analyze the data collected by the two current acquisition units 13, thereby improving the accuracy of the current acquisition unit 13, thereby improving the safety of the charging and discharging circuit 300 of the battery pack 200, and meeting the requirements of the electrical equipment 2000 ( Figure 1 Safety performance requirements of ASIL C level in the Automotive Safety Integrity Level (ASIL) as shown in the figure.

[0061] Among them, the main body 131 is sleeved on the first connector 1211 and / or the second connector 1213, and the side of the main body 131 opposite to the first connector 1211 and / or the second connector 1213 is not in contact with other structures. Therefore, compared with the close fit between the main body 131 and other structures, the heat dissipation performance of the main body 131 is better, thereby preventing the current acquisition unit 13 from being damaged due to excessive temperature, and improving the accuracy of information acquisition by the current acquisition unit 13. In addition, compared with the traditional current acquisition unit 13 that needs to be electrically connected to other electrical components through electrical connectors such as copper bars, the current acquisition unit 13 in this embodiment can realize the collection of current information on the charge and discharge circuit 300 without the need for electrical connectors such as copper bars. Therefore, on the one hand, the size of the integrated module 10 can be reduced, which is conducive to the miniaturization of the battery pack 1000; on the other hand, the production cost of the integrated module 10 can also be reduced.

[0062] In the related art, the main body needs to be electrically connected to the main negative relay using a copper busbar, wherein the copper busbar needs to be connected and fixed to the terminal of the main negative 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 negative relay. 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 negative relay and the current acquisition unit in the battery pack. In the present application, the main body 131 can be set to the first connector 1211 and / or the second connector 1213 by welding. Therefore, compared with the use of fasteners for connection and fixation, 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.

[0063] In the integrated module 10 of the power distribution device of the embodiment of the present application, the main negative relay 12 and at least one current collection unit 13 are both arranged in the accommodating cavity 110, and the main body 131 of the current collection unit 13 is sleeved on the connector 121. Therefore, compared with the traditional current collection unit electrically connected to the connector of the main negative relay through the copper busbar, the main body 131 of the current collection unit 13 in the present application does not need to be electrically connected to the connector 121 through the copper busbar, and the first end 1351 of the electrical connector 135 is electrically connected to the main body 131, and the second end 1353 of the electrical connector 135 is penetrated and installed in the partition 123, so that the main negative relay 12 and the current collection unit 13 are integrated, and on the one hand, the structure of the current collection unit 13 can be simplified, the space occupied by the main negative relay 12 and the current collection unit 13 can be reduced, and the utilization rate of the internal space of the battery pack 1000 can be improved, which is conducive to the miniaturization of the battery pack 1000; on the other hand, the stability and reliability of the operation of the main negative relay 12 and the current collection unit 13 can be guaranteed.

[0064] In addition, the housing 11, the main negative relay 12 and at least one current acquisition unit 13 together form an integrated module structure, which can also simplify the number of cables of the power distribution device 100, thereby simplifying the line structure of the charging and discharging circuit 300 and reducing the failure rate.

[0065] See also Figure 2 In some embodiments, the power distribution device further includes an integrated module 20, which includes a fuse 21, a main positive relay 23, and a pre-charge module 25. The integrated module 20 is used to control the operation of the battery pack 1000. The integrated module 20 is electrically connected to a battery management system 30, and the battery management system 30 is used to control the operation of the integrated module 20.

[0066] Among them, compared with the traditional fuse, main positive relay and pre-charge module as independent components, when the fuse 21, main positive relay 23 and pre-charge module 25 are installed as a whole in the battery pack 1000, the integrated fuse 21, main positive relay 23 and pre-charge module 25 occupy a smaller space size, thereby improving the utilization rate of the internal space of the battery pack 1000, thereby realizing the miniaturization of the battery pack 1000. In addition, the main positive relay 23, fuse 21, and pre-charge module 25 together form an integrated module structure, which can also simplify the number of cables of the power distribution device 100, thereby simplifying the line structure of the charge and discharge circuit 300 and reducing the failure rate.

[0067] Specifically, see Figure 2In some embodiments, the relay also includes a main positive relay 23, which is a relay with a normally open contact. The main positive relay 23 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 23 is activated, the contacts are closed to turn on the charge and discharge circuit 300 of the battery pack 200, and when the input reaches a specified value, the contacts are opened to disconnect the charge and discharge circuit 300 of the battery pack 200. Therefore, the setting of the main positive relay 23 can protect the charge and discharge circuit 300, thereby improving the working stability of the battery pack 1000.

[0068] The fuse 21 is an electrical component that generates heat to melt the fuse and disconnect the circuit when the current exceeds a specified value. In the present application, the main positive relay 23 and the fuse 21 can be electrically connected and connected together to the position of the charging and discharging circuit 300 of the battery pack 200 near the positive electrode of the battery pack 200 to protect the charging and discharging circuit 300, thereby improving the working stability of the battery pack 1000.

[0069] In some embodiments, the pre-charging module 25 may include a pre-charging relay 251, wherein the pre-charging relay 251 is an electrical component that can start and disconnect the pre-charging circuit to protect the electrical components and the charging and discharging circuit 300 from voltage shocks. In the present application, the pre-charging relay 251 can be electrically connected to the main positive relay 23 and the fuse 21 in parallel, so that the setting of the pre-charging relay 251 can prevent the electrical components and the charging and discharging circuit 300 in the battery pack 1000 from being damaged, and improve the working stability of the battery pack 1000.

[0070] Furthermore, in some embodiments, the pre-charge module 25 may also include a pre-charge resistor 253, wherein the pre-charge resistor 253 is an electrical component capable of limiting the output current of the battery pack 200. In the present application, the pre-charge resistor 253 is connected in series with the pre-charge relay 251, and the pre-charge resistor 253 and the pre-charge relay 251 are electrically connected in parallel with the main positive relay 23 and the fuse 21. Thus, the setting of the pre-charge resistor 253 can prevent the electrical components and the charge and discharge circuit 300 in the battery pack 1000 from being damaged, further improving the working stability of the battery pack 1000. In the present application, the pre-charge module 25 includes the pre-charge relay 251 and the pre-charge resistor 253.

[0071] In some embodiments, the pre-charge relay 251 and the pre-charge resistor 253 may be independent components, in other words, the pre-charge relay 251 and the pre-charge resistor 253 may be installed separately in the battery pack 1000, thereby improving the working stability of the battery pack 1000. In other embodiments, the pre-charge relay 251 and the pre-charge resistor 253 may form an integrated module structure together, thereby, compared with the pre-charge relay 251 and the pre-charge resistor 253 being independent components, the integrated pre-charge relay 251 and the pre-charge resistor 253 occupy a smaller space size, thereby improving the working stability of the battery pack 1000, and also improving the utilization rate of the internal space of the battery pack 1000, thereby miniaturizing the battery pack 1000.

[0072] It can be understood that in other embodiments, the main positive relay 23 and the fuse 21 can jointly form an integrated module structure, and the pre-charge relay 251 and the pre-charge resistor 253 can jointly form an integrated module structure; or, the main positive relay 23, the fuse 21, the pre-charge relay 251 and the pre-charge resistor 253 are all independent components; or the main positive relay 23 and the fuse 21 are all independent components, and the pre-charge relay 251 and the pre-charge resistor 253 jointly form an integrated module structure; or, the main positive relay 23 and the fuse 21 can jointly form an integrated module structure, and the pre-charge relay 251 and the pre-charge resistor 253 are all independent components.

[0073] Please refer again Figure 2 In this embodiment, compared with the BMS 30 being arranged outside the power distribution device 100, the BMS 30 being integrated inside 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.

[0074] Specifically, in some embodiments, the BMS 30 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 30 .

[0075] 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 300 of the battery pack 200; BMC is a system that monitors the current, voltage and temperature of the battery pack 200 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 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 BMS30 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 BMS30 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 BMS30 line, reduce the failure risk of BMS30, and ensure the normal operation of the battery pack 1000; on the other hand, when the BMS30 is integrated into the power distribution device 100, the size of the power distribution device 100 is smaller, thereby enabling the miniaturization of the battery pack 1000.

[0076] In addition, BMS30 can be electrically connected to the integrated module 10 and the integrated module 20 through copper busbars, wiring harnesses or electrical connecting plates, so that BMS30 can control the working status of the integrated module 10 and the integrated module 20 (for example, power on or power off, etc.), thereby controlling the operation of the battery pack 1000.

[0077] If the main negative relay 12 is installed on the battery pack 1000 by bonding or other non-detachable connection methods, when the main negative 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 the power consumption equipment 2000 ( Figure 2 The cost of using (as shown) is high. Please refer to Figure 1 , and combined with Figure 3 and Figure 4 ,or Figure 5 and Figure 6In the embodiment of the present application, the housing 11 may further include a mounting portion 117, the mounting portion 117 extending from the outer peripheral wall 1111 of the housing 11 in a direction away from the housing 11, and the mounting portion 117 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 the main negative relay 12 needs to be replaced, 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.

[0078] In some embodiments, the housing 11 further includes a plug-in portion 119 opposite to the current collection unit 13, and the plug-in portion 119 is disposed on the outer peripheral wall 1153 of the housing 11. The integrated module 10 may further include a wiring harness (not shown), one end of which is electrically connected to the BMS 30, and the other end of which is electrically connected to the second end 1353 of the electrical connector 135 through the plug-in portion 119.

[0079] Specifically, in some embodiments, when the main body 131 of the current collection unit 13 collects the current information flowing through the first connector 14 and / or the second connector 15, the circuit board 133 can transmit the current information to the BMS 30 through the electrical connector 135 and the wiring harness, so that the BMS 30 controls the operation of the battery pack 1000 according to the current information, thereby improving the safety of the battery pack 1000. It should be noted that the quantitative relationship between the plug-in portion 119 and the current collection unit 13 is one-to-one, that is, one plug-in portion 119 corresponds to one current collection unit 13.

[0080] In some embodiments, when the current collection unit 13 includes two, the plug-in parts 119 include two, and the two plug-in parts 119 are arranged on the same side wall of the housing 11. Therefore, compared with the two plug-in parts 119 being arranged on different side walls of the housing 11, the two plug-in parts 119 being arranged on the same side wall of the housing 11 can reduce the overall size of the integrated module 10 on the one hand, thereby not only reducing the possibility of interference between the plug-in parts 119 and other electrical components, but also realizing the miniaturization of the battery pack 1000; on the other hand, it can facilitate the electrical connection between the plug-in parts 119 and the wiring harness, and improve the assembly efficiency of the power distribution device 100. In the present application, the two plug-in parts 119 can be arranged on the same side of the peripheral wall 115.

[0081] In some embodiments, the integrated module 10 further includes a low-voltage connector 16, which is electrically connected to the coil 125 of the main negative relay 12 and passes through the housing 11. Specifically, in some embodiments, the electrical device 2000 may further include a low-voltage power supply (not shown). The low-voltage connector 16 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 coil 125 of the main negative relay 12, thereby ensuring the stable operation of the main negative relay 12.

[0082] See also Figure 2 , and combined with Figure 4 or Figure 6 In some embodiments, during operation of the battery pack 1000, the current flow may be as follows:

[0083] The battery pack 1000 is in the pre-power-on process: when the BMS30 receives the pre-power-on information, the BMS30 controls the low-voltage power supply to transmit electric energy to the pre-charge relay 251, so that the pre-charge relay 251 starts to work. Specifically, first, the current generated by the battery pack 200 can flow out to the load after passing through the fuse 21, the pre-charge relay 251 and the pre-charge resistor 253, and then the current can flow into the integrated module 10 through the first connector 14, and flow back to the battery pack 200 through the moving part 126 and the second connector 15, wherein, when the current flows through the first connector 14 and the second connector 15, the current acquisition unit 13 can collect the current information;

[0084] The battery pack 1000 is in the pre-power-on and power-off process: when the BMS 30 receives the pre-power-on completion information, the BMS 30 controls the low-voltage power supply to transmit power to the main positive relay 23, so that the main positive relay 23 starts to work, and controls the low-voltage power supply to stop supplying power to the pre-charge relay 251, so that the pre-charge relay 251 stops working;

[0085] The battery pack 1000 is in the discharge process: the current generated by the battery pack 200 flows out to the load through the fuse 21 and the main positive relay 23, and then the current can flow into the integrated module 10 through the first connector 14, and flow back to the battery pack 200 through the moving part 126 and the second connector 15, wherein, when the current flows through the first connector 14 and the second connector 15, the current collection unit 13 can collect current information;

[0086] The battery pack 1000 is in the charging process: the current can flow into the battery pack 200 through the main positive relay 23 and the fuse 21, and then the current can flow into the integrated module 10 through the second connector 15, and flow out through the moving part 126 and the first connector 14, wherein when the current flows through the first connector 14 and the second connector 15, the current acquisition unit 13 can collect current information.

[0087] 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.

[0088] 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.

[0089] 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: include: A housing, wherein the housing is provided with a receiving cavity; A main negative relay, the main negative relay is arranged in the accommodating cavity, the main negative relay is used to connect to the battery management system of the power distribution device, the main negative relay comprises a connector, a separator and a coil, the connector passes through the housing, and the separator is arranged between the connector and the coil; and At least one current collection unit is arranged in the accommodating cavity, and the current collection unit is used to connect with the battery management system. The current collection unit includes a main body and an electrical connector. The main body is sleeved on the connector and electrically connected to the connector. The first end of the electrical connector is electrically connected to the main body, and the second end of the electrical connector is penetrated and installed on the partition.

2. The integrated module according to claim 1, characterized in that: The connector comprises a first connector and a second connector, wherein the first connector and the second connector 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 connector to selectively connect or disconnect the electrical connection between the first connector and the second connector.

3. The integrated module according to claim 2, characterized in that: The housing comprises a first side wall, a second side wall and a peripheral wall located between the first side wall and the second side wall, wherein the first side wall, the second side wall and the peripheral wall together form a receiving cavity; the connector comprises a first peripheral wall opposite to the inner peripheral wall of the housing, and the moving member comprises a second peripheral wall opposite to the inner peripheral wall of the housing; The current collection unit also includes: A circuit board is arranged 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.

4. The integrated module according to claim 2, characterized in that: The current collection unit comprises one, the main body of the current collection unit is electrically connected to the first connector or the second connector; or The current collection units include two, wherein the body of one of the current collection units is electrically connected to the first connector; and the body of the other current collection unit is electrically connected to the second connector.

5. The integrated module according to claim 1, characterized in that: The shell 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 shell; the integrated module also includes a wiring harness, one end of which is electrically connected to the battery management system, and the other end of the wiring harness is electrically connected to the second end of the electrical connector through the plug-in portion.

6. The integrated module according to claim 5, characterized in that: In the case where there are two current collection units, there are two plug-in parts, and the two plug-in parts are arranged on the same side of the housing.

7. The integrated module according to claim 1, characterized in that: The integrated module also includes: A low voltage connector is electrically connected to the coil and passes through the shell.

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: include: The integrated module according to any one of claims 1 to 8, wherein the integrated module is used to control the operation of the battery pack; and A battery management system is electrically connected to the integrated module and is used to control the operation of the integrated module.

10. The power distribution device according to claim 9, characterized in that: The power distribution device also includes: An integrated module, the integrated module includes a fuse, a main positive relay, and a pre-charging module, the integrated module is used to control the operation of the battery pack, the integrated module is electrically connected to the battery management system, and the battery management system is used to control the operation of the integrated module.

11. A battery pack, characterized in that: include: Battery pack; and The power distribution device according to any one of claims 9 to 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 device, characterized in that: include: The battery pack according to claim 11.

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