Battery management assembly and battery pack

Abstract

The invention provides a battery management assembly and a battery pack. The battery management assembly comprises a BDU shell; the electric connection copper bar is connected to the BDU shell, and the electric connection copper bar is provided with an acquisition insertion piece end; the main relay assembly is assembled in the BDU shell, the main relay assembly comprises a main relay body, and the main relay body is provided with a control insertion piece end; and one end of the BMS board is electrically connected with the acquisition insertion piece end, and the other end of the BMS board is electrically connected with the control insertion piece end. The electric connection structure in the battery management assembly is simplified, the connection is reliable, and the space utilization rate is improved.

Description

Technical Field

[0001] This application relates to a battery management component and battery pack, belonging to the field of new energy battery technology. Background Technology

[0002] In electric vehicles, energy storage systems, and other fields, battery packs are the core energy storage units. Battery packs typically contain battery management components used for electrical connections, status monitoring, charge / discharge control, and safety protection.

[0003] In conceiving and implementing this application, the applicant discovered at least the following problems: Existing battery management components, such as battery disconnect units (BDUs), typically include components such as relays, fuses, current acquisition units, and electrical connection busbars. These components usually need to be electrically connected to the BMS board to achieve signal acquisition and control command transmission. Currently, this is achieved through complex wiring harnesses, which not only increases the complexity of the components and assembly time but also occupies a large amount of space.

[0004] The preceding description is intended to provide general background information and does not necessarily constitute prior art. Summary of the Invention

[0005] This application provides a battery management component and battery pack, which simplifies the internal electrical connection structure of the battery management component, ensures reliable connection, and improves space utilization.

[0006] This application provides a battery management component, including:

[0007] BDU housing;

[0008] An electrical connection copper busbar is connected to the BDU housing, and the electrical connection copper busbar has a data acquisition insert end;

[0009] The main relay assembly is assembled inside the BDU housing. The main relay assembly includes a main relay body, which has a control plug terminal.

[0010] The BMS board has one end electrically connected to the acquisition chip and the other end electrically connected to the control chip.

[0011] The beneficial effects of this application are as follows: By directly connecting the BMS board to both the acquisition pins of the electrical connection copper busbar and the control pins of the main relay, the internal electrical connection structure of the battery management component is simplified, space utilization is improved, and the complex wiring harnesses of traditional solutions are reduced. This not only reduces material costs and assembly time but also reduces potential failure risks and contact resistance caused by too many connection points, thereby improving the reliability of signal acquisition and control command transmission and the stability of the entire system.

[0012] In some alternative implementations, the BMS board has a first connector and a second connector, the first connector being connected to the acquisition connector and the second connector being connected to the control connector.

[0013] It should be noted that by directly connecting the BMS board to the acquisition pins of the electrical connection copper busbar and the control pins of the main relay, the internal wiring is simplified and the use of connectors and wire harnesses is reduced.

[0014] In some alternative implementations, the BMS board has multiple soldering holes, through which the acquisition and control inserts are respectively soldered to the BMS board.

[0015] It should be noted that welding provides a robust mechanical connection and excellent electrical conductivity, with extremely low resistance at the connection point, thus preventing loosening caused by vibration. This connection method ensures the permanence and ultra-high reliability of the connection between the BMS board and the core power / control components, making it particularly suitable for automotive environments with extremely high requirements for vibration and connection stability.

[0016] In some alternative embodiments, the BDU housing includes a top cover and a base, the top cover being disposed on the base, and the top cover and the base forming a receiving cavity, in which the electrical connection copper busbar, the main relay assembly, and the BMS board are respectively housed;

[0017] The electrical connection copper busbar is located on the base.

[0018] It should be noted that the modular and integrated design of the battery management component is achieved by forming a receiving cavity with the top cover and the base, housing all key components. This structure facilitates transportation, installation, and overall maintenance, and provides effective physical protection and insulation for internal components, improving the overall safety and environmental adaptability of the component. Placing the electrical connection copper busbars in the base lays the foundation for subsequent integrated injection molding and positioning fixation.

[0019] In some alternative implementations, the base is a plastic part;

[0020] The electrical connection copper busbar and the base are formed into a single piece through injection molding.

[0021] It should be noted that the electrical connection copper busbar can be integrated with the base through an insert injection molding process, which greatly improves structural strength, insulation performance and assembly efficiency.

[0022] In some alternative embodiments, the base is provided with a limiting groove that accommodates a portion of the electrical connection copper busbar; and / or,

[0023] The base is also provided with a limiting boss that protrudes toward the electrical connection copper busbar. The limiting boss and the base form a limiting space to accommodate another part of the electrical connection copper busbar.

[0024] It should be noted that the structural design of the limiting groove and limiting boss enables multi-point and multi-directional limiting of the electrical connection copper busbar. This ensures that the electrical connection copper busbar is accurately positioned and securely fixed during assembly and throughout its service life, and will not shift or loosen due to external forces or vibrations, thereby guaranteeing the stability and safety of the electrical connection.

[0025] In some alternative implementations, the battery management component also includes a shunt connected to the copper busbar, the main relay body, and the shunt.

[0026] It should be noted that by introducing a shunt and connecting it to the electrical connection copper busbar and the main relay body, a complete current acquisition function is integrated. This enables the battery management component to monitor the main circuit current in real time, providing crucial data for battery management system state estimation (such as SOC), fault diagnosis, and overcurrent protection, thereby enhancing the management accuracy and safety of the battery pack.

[0027] In some alternative embodiments, the main relay assembly further includes a bracket having a slot in which the main relay body is snapped; and / or,

[0028] The bracket is equipped with a latching device, which is located in a slot to engage with the main relay body.

[0029] It should be noted that the design of the bracket, slot, and clip provides an efficient and reliable fixing solution for the main relay, requiring only simple tools. The snap-fit ​​structure avoids the use of screws and other fasteners, simplifying the assembly process. At the same time, the cooperation of the slot and clip effectively absorbs and buffers vibration energy, preventing the main relay body from loosening and improving its connection reliability under harsh operating conditions.

[0030] In some alternative implementations, the battery management assembly also includes a seal surrounding the periphery of the base and located on the side of the base opposite to the top cover.

[0031] The battery management assembly also includes an insulating component, which is attached to the side of the base away from the top cover;

[0032] The battery management component also includes a heat-conducting element, and the base is provided with a mounting port. The heat-conducting element is assembled into the mounting port and abuts against the electrical connection copper busbar.

[0033] It should be noted that the BDU housing provides excellent physical protection and insulation. The design of additional seals, insulation components, and thermal conductive elements further enhances the overall sealing protection level, electrical insulation performance, and heat dissipation capacity of the assembly, ensuring safe and stable operation under harsh conditions.

[0034] In addition, this application also provides a battery pack, including a housing, a battery pack, a liquid cooling plate, and the aforementioned battery management components;

[0035] The battery pack is housed inside the enclosure, and the battery management components are located inside the enclosure and abut against the liquid cooling plate.

[0036] The battery management component and battery pack provided in this application include a housing, a battery pack, a liquid cooling plate, and the aforementioned battery management component. The battery pack is disposed within the housing, and the battery management component is located within the housing and abuts against the liquid cooling plate. The battery management component includes a BDU housing; an electrical connection copper busbar connected to the BDU housing, the electrical connection copper busbar having a data acquisition terminal; a main relay assembly assembled within the BDU housing, the main relay assembly including a main relay body having a control terminal; and a BMS board, one end of the BMS board being electrically connected to the data acquisition terminal, and the other end of the BMS board being electrically connected to the control terminal.

[0037] By directly connecting the BMS board to both the acquisition pins of the electrical connection busbar and the control pins of the main relay, the internal electrical connection structure of the battery management component is simplified, space utilization is improved, and the complex wiring harnesses of traditional solutions are reduced. This not only reduces material costs and assembly time but also reduces potential failure risks and contact resistance caused by too many connection points, improving the reliability of signal acquisition and control command transmission, as well as the stability of the entire system. Attached Figure Description

[0038] The above and other objects, features, and advantages of embodiments of this application will become more readily understood through the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this application will be described by way of example and non-limitation, wherein:

[0039] Figure 1 This is an exploded view of the battery management component according to an embodiment of this application;

[0040] Figure 2 This is a partial structural diagram of the electrical connection copper busbar in the battery management component of this application embodiment;

[0041] Figure 3 This is a schematic diagram of the main relay body in the battery management component of this application embodiment;

[0042] Figure 4 This is a top view of the battery management component in an embodiment of this application without the top cover;

[0043] Figure 5 This is a schematic diagram of the structure of the BMS board in the battery management component of this application embodiment;

[0044] Figure 6This is a schematic diagram of the battery management component structure in a partial embodiment of this application;

[0045] Figure 7 This is a schematic diagram of the assembly structure of the first type of electrical connection copper busbar and the base in the battery management component of this application embodiment;

[0046] Figure 8 This is a first-view structural schematic diagram of the assembly of the second type of electrical connection copper busbar and the base in the battery management component of this application embodiment;

[0047] Figure 9 This is an assembly diagram of an electrical connection copper busbar, a main relay, and a shunt in a battery management component according to an embodiment of this application.

[0048] Figure 10 This is an assembly diagram of another type of electrical connection copper busbar, main relay and shunt in the battery management component of this application embodiment;

[0049] Figure 11 This is a first-view structural diagram of the bracket in the battery management component according to an embodiment of this application;

[0050] Figure 12 This is a schematic diagram of the bracket in the battery management component according to an embodiment of this application from a second perspective.

[0051] Figure 13 This is a second-view structural diagram of the assembly of the second type of electrical connection copper busbar and the base in the battery management component of this application embodiment.

[0052] Figure label:

[0053] 100 - Battery Management Component;

[0054] 110-BDU housing; 111-Top cover;

[0055] 112-Base; 1121-Limiting groove; 1122-Limiting boss; 1123-Mounting port; 1124-First fixing groove; 1125-Second fixing groove; 1126-First limiting rib; 1127-Second limiting rib; 1128-Third limiting rib; 1129-Fourth limiting rib; 1102-Hot riveting column;

[0056] 120 - Electrical connection copper busbar; 1201 - Data acquisition insert end; 121 - First copper busbar; 122 - Second copper busbar; 123 - Third copper busbar; 124 - Fourth copper busbar; 125 - Fifth copper busbar; 126 - Sixth copper busbar; 127 - Seventh copper busbar; 128 - Limiting hole; 129 - Grounding copper busbar;

[0057] 130 - Main relay assembly; 131 - Main relay body; 1311 - Control plug-in terminal; 1312 - Main positive relay; 1313 - Main negative relay; 1314 - Fast charging positive relay; 1315 - Fast charging negative relay;

[0058] 132-Bracket; 1321-Slot; 1322-Snap fastener;

[0059] 140 - BMS board; 141 - First connector terminal; 142 - Second connector terminal; 143 - Solder hole; 144 - Precharge relay; 145 - Precharge resistor; 146 - Pressure sensor; 147 - Floating connector; 148 - Pin; 149 - Fixing hole;

[0060] 150 - Diverter; 160 - Seal; 170 - Insulation; 180 - Heat-conducting component;

[0061] 191 - First interface; 192 - Second interface; 193 - Third interface; 194 - Fourth interface; 195 - Fifth interface; 196 - Sixth interface; 197 - Seventh interface; 198 - Eighth interface. Detailed Implementation

[0062] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. All other obtained embodiments are within the scope of protection of this application. In the absence of conflict, the following embodiments and features can be combined with each other.

[0063] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0064] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0065] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0066] In conceiving and implementing this application, the applicant discovered at least the following problems: Existing battery management components, such as battery disconnect units (BDUs), typically include components such as relays, fuses, current acquisition units, and electrical connection busbars. These components usually need to be electrically connected to the BMS board to achieve signal acquisition and control command transmission. Currently, this is achieved through complex wiring harnesses, which not only increases the complexity of the components and assembly time but also occupies a large amount of space.

[0067] The battery management component proposed in this application simplifies the internal electrical connection structure by directly connecting the BMS board to both the acquisition pins of the electrical connection copper busbar and the control pins of the main relay. This improves space utilization and reduces the complex wiring harnesses found in traditional solutions. This not only reduces material costs and assembly time but also minimizes potential failure risks and contact resistance caused by excessive connection points, thereby enhancing the reliability of signal acquisition and control command transmission, as well as the overall system stability.

[0068] The battery management component provided in this application will be described in detail below with reference to specific embodiments.

[0069] Figure 1 This is an exploded view of the battery management component according to an embodiment of this application. Figure 2 This is a partial structural diagram of the electrical connection copper busbar in the battery management component according to an embodiment of this application. Figure 3 This is a schematic diagram of the main relay body in the battery management component of this application embodiment. Figure 4 This is a top view of the battery management component according to an embodiment of this application without the top cover. Figure 5 This is a schematic diagram of the structure of the BMS board in the battery management component of this application embodiment.

[0070] like Figures 1 to 5 As shown in the figure, this application embodiment proposes a battery management component 100, including:

[0071] BDU housing 110;

[0072] The electrical connection copper bus 120 is connected to the BDU housing 110, and the electrical connection copper bus 120 has a data acquisition insert end 1201;

[0073] The main relay assembly 130 is assembled inside the BDU housing 110. The main relay assembly 130 includes a main relay body 131, and the main relay body 131 has a control plug-in terminal 1311.

[0074] BMS board 140, one end of which is electrically connected to acquisition chip 1201, and the other end of which is electrically connected to control chip 1311.

[0075] It should be noted that the BDU housing 110 serves as the basic structure of the entire assembly, used to house and secure the internal components.

[0076] It should be noted that the electrical connection copper busbar 120 is used to carry high current and transmit signals. It is fixedly connected to the BDU housing 110. The electrical connection copper busbar 120 has an extended acquisition insert 1201, which is used to connect to the BMS board 140 so that the BMS board 140 can acquire signals such as battery voltage and temperature (this can be achieved by setting voltage acquisition points or installing temperature sensors on the copper busbar).

[0077] In some embodiments, the electrical connection copper busbar 120 is connected to the BDU housing 110, and the electrical connection copper busbar 120 has a data acquisition plug-in terminal 1201 for acquiring signals such as voltage or temperature.

[0078] In some embodiments, the electrical connection copper busbar 120 includes a first copper busbar 121, a second copper busbar 122, a third copper busbar 123, a fourth copper busbar 124, a fifth copper busbar 125, a sixth copper busbar 126, and a seventh copper busbar 127.

[0079] In some embodiments, a sampling insert end 1201 is welded onto the electrical connection copper busbar 120. The electrical connection copper busbar 120 is provided with two limiting holes 128. One end of the sampling insert end 1201 is inserted into the two limiting holes 128 on the electrical connection copper busbar 120, and the other end is chamfered on all four sides.

[0080] It should be noted that the main relay assembly 130 is also assembled inside the BDU housing 110 and is used to control the on / off state of the main circuit current. The main relay assembly 130 includes a main relay body 131. The main relay body 131 has a control plug terminal 1311, which is used to receive control signals (such as activation or deactivation commands) from the BMS board 140.

[0081] In some embodiments, the main relay is provided with a control plug-in terminal 1311, and the control plug-in terminal 1311 and the acquisition plug-in terminal 1201 can be plugged into or soldered to the BMS board 140.

[0082] In some embodiments, the main relay body 131 includes a main positive relay 1312, a main negative relay 1313, a fast charging positive relay 1314, and a fast charging negative relay 1315.

[0083] It should be noted that the BMS board 140 is the core control part of the battery management system. One end of the BMS board 140 is electrically connected to the acquisition terminal 1201 of the electrical connection copper busbar 120 to acquire acquisition signals; the other end of the BMS board 140 is electrically connected to the control terminal 1311 of the main relay body 131 to send control commands.

[0084] In some embodiments, the BMS board 140 integrates a precharge relay 144, a precharge resistor 145, and a pressure sensor 146.

[0085] In some embodiments, the battery management component 100 is further provided with a plurality of interface components, including a first interface 191, a second interface 192, a third interface 193, a fourth interface 194, a fifth interface 195, a sixth interface 196, a seventh interface 197, and an eighth interface 198.

[0086] In some embodiments, the first interface 191 and the second interface 192 are located at both ends of the BDU housing 110, the third interface 193 and the fourth interface 194 are located on one side of the BDU housing 110, and the fifth interface 195, the sixth interface 196, the seventh interface 197 and the eighth interface 198 are located on the other side of the BDU housing 110.

[0087] Specifically, the first copper busbar 121 is connected to the first interface 191 and the positive terminal of the main positive relay 1312;

[0088] The second copper busbar 122 is connected to the negative terminal of the main positive relay 1312, the fifth interface 195, the negative terminal of the fast charging positive relay 1314, and the third interface 193;

[0089] The third copper busbar 123 connects to the positive terminal of the fast charging positive relay 1314 and the seventh interface 197;

[0090] The fourth copper busbar 124 is connected to the negative terminal of the fast charging negative relay 1315;

[0091] The fifth copper busbar 125 is connected to the positive terminal of the fast charging negative relay 1315, the fourth interface 194, the sixth interface 196, and the positive terminal of the main negative relay 1313;

[0092] The sixth copper busbar 126 connects the negative terminal of the main negative relay 1313 to the shunt 150;

[0093] The seventh copper busbar 127 connects to the shunt 150 and the second interface 192.

[0094] By directly connecting the BMS board 140 to both the acquisition terminal 1201 of the electrical connection copper busbar 120 and the control terminal 1311 of the main relay, the internal electrical connection structure of the battery management component 100 is simplified, reducing the complex wiring harnesses found in traditional solutions. This not only reduces material costs and assembly time but also minimizes potential failure risks and contact resistance caused by excessive connection points, improving the reliability of signal acquisition and control command transmission, as well as the overall system stability.

[0095] like Figures 1 to 5 As shown, in some optional embodiments, the BMS board 140 has a first connector 141 and a second connector 142, the first connector 141 being connected to the acquisition connector 1201 and the second connector 142 being connected to the control connector 1311.

[0096] It should be noted that by directly connecting the BMS board 140 to the acquisition plug-in terminal 1201 of the electrical connection copper busbar 120 and the control plug-in terminal 1311 of the main relay through plug-in, the internal wiring is simplified and the use of connectors and wire harnesses is reduced.

[0097] Furthermore, it makes the assembly process extremely simple and efficient, like "plug and play." It eliminates processes such as welding or screw fastening, significantly improving production efficiency and facilitating subsequent maintenance and replacement. At the same time, the standardized plug-in interface also reduces the risk of human error during the assembly process.

[0098] In some embodiments, the connection method between the BMS board 140 and the plug-in end can be varied.

[0099] In one embodiment, the BMS board 140 may integrate or connect a first connector 141 and a second connector 142. The first connector 141 can be directly plugged into the acquisition connector 1201, and the second connector 142 can be directly plugged into the control connector 1311. This connection method facilitates assembly and maintenance.

[0100] In some embodiments, if the acquisition insert 1201 and the control insert 1311 are connected to the BMS board 140, then the integrated fish-mouth terminal is soldered on the BMS board 140, and the acquisition insert 1201 and the control insert 1311 are connected to the fish-mouth terminal on the BMS board 140.

[0101] Figure 6 This is a schematic diagram of the battery management component structure in a partial embodiment of this application.

[0102] like Figures 1 to 4 as well as Figure 6 As shown, in some optional embodiments, the BMS board 140 is provided with a plurality of soldering holes 143, and the acquisition insert end 1201 and the control insert end 1311 respectively pass through different soldering holes 143 and are soldered to the BMS board 140.

[0103] It should be noted that the welded connection provides a robust mechanical connection and excellent electrical conductivity, with extremely low resistance at the connection point, thus avoiding loosening issues caused by vibration. This connection method ensures the permanence and ultra-high reliability of the connection between the BMS board 140 and the core power / control components, making it particularly suitable for automotive environments with extremely high requirements for vibration and connection stability.

[0104] Specifically, the acquisition insert 1201 and the control insert 1311 pass through different welding holes 143 and are fixedly connected to the BMS board 140 by welding (e.g., wave soldering, reflow soldering, etc.). The welding connection provides a stable and reliable electrical and mechanical connection.

[0105] In some embodiments, multiple soldering holes 143 may be formed on the BMS board 140. During assembly, the acquisition pin end 1201 of the electrical connection copper busbar 120 and the control pin end 1311 of the main relay body 131 pass through the corresponding soldering holes 143, and are then fixed to the BMS board 140 by a soldering process (such as wave soldering) to achieve electrical connection. Soldering connection has the advantages of reliable connection and low resistance.

[0106] Figure 7 This is a schematic diagram of the assembly structure of the first type of electrical connection copper busbar and the base in the battery management component of this application embodiment.

[0107] like Figures 1 to 4 ,as well as Figure 7 As shown, in some optional embodiments, the BDU housing 110 includes a top cover 111 and a base 112. The top cover 111 is disposed on the base 112, and the top cover 111 and the base 112 form a receiving cavity. The electrical connection copper busbar 120, the main relay assembly 130 and the BMS board 140 are respectively received in the receiving cavity.

[0108] The electrical connection copper busbar 120 is located on the base 112.

[0109] It should be noted that the modular and integrated design of the battery management component 100 is achieved by forming a receiving cavity with the top cover 111 and the base 112, housing all key components. This structure facilitates transportation, installation, and overall maintenance, and provides effective physical protection and insulation for internal components, improving the overall safety and environmental adaptability of the component. The placement of the electrical connection copper busbar 120 on the base 112 lays the foundation for subsequent integrated injection molding and positioning fixation.

[0110] In some embodiments, the BDU housing 110 includes a top cover 111 and a base 112. The top cover 111 covers the base 112, and the two are fixedly connected by means of snaps, screws, etc., together forming a closed receiving cavity. The electrical connection copper busbar 120, the main relay assembly 130, the BMS board 140, and other optional components are all disposed within this receiving cavity.

[0111] In some embodiments, the BMS board 140 can be heat-riveted to the base 112 or bolted to the base 112.

[0112] In some embodiments, the BMS board 140 is hot-riveted to the base 112. The base 112 is provided with a hot riveting post 1102, and the BMS board 140 is provided with a fixing hole 149. The hot riveting post 1102 on the base 112 passes through the fixing hole 149 on the BMS board 140, and the BMS board 140 is hot-riveted to the hot riveting post 1102.

[0113] In other embodiments, if the BMS board 140 is bolted to the base 112, the base 112 is provided with a BMS board 140 fixing insert, and the bolt passes through the fixing hole 149 on the BMS board 140 and cooperates with the insert for fixing.

[0114] In some embodiments, the electrical connection copper busbar 120 further includes a grounding copper busbar 129, one end of which is connected to the BMS board 140 and the other end is connected to the BDU fixing steel sleeve.

[0115] In some embodiments, the BMS board 140 is provided with a floating connector 147, and the shunt 150 collects and outputs temperature information via a pin 148, which is connected to the floating connector 147 by plugging.

[0116] like Figure 1 as well as Figure 7 As shown, the base 112 is provided with a first fixing groove 1124 and a second fixing groove 1125. Glue is applied in the fixing grooves to fix the pre-charge relay 144 and the pre-charge resistor 145.

[0117] like Figure 1 , Figure 7 As shown, in some alternative embodiments, the base 112 is a plastic part;

[0118] The electrical connection copper busbar 120 and the base 112 are formed into a single piece by injection molding.

[0119] It should be noted that the electrical connection copper busbar 120 can be integrated with the base 112 through an insert injection molding process, which greatly improves the structural strength, insulation performance and assembly efficiency.

[0120] Furthermore, the copper busbar is encased in plastic, which integrates it with the base 112 into a robust whole, providing excellent resistance to vibration and impact.

[0121] Plastic itself is an insulator, which fundamentally prevents the risk of short circuit between the electrical connection copper busbar 120 and the base 112.

[0122] Furthermore, the precise positioning of the copper busbars is completed during the injection molding process, eliminating the need for separate copper busbar installation and adjustment steps, which greatly improves production efficiency and consistency.

[0123] In some embodiments, to optimize the structure, the base 112 is preferably made of an insulating material, such as engineering plastics (PA66, PBT, etc.), and is injection molded.

[0124] Specifically, to enhance the structure and simplify assembly, the electrical connection copper busbar 120 can be integrally formed with the base 112 using an insert injection molding process. That is, when injection molding the base 112, the pre-formed electrical connection copper busbar 120 is placed into the mold, so that the plastic covers a specific part of the copper busbar, forming a solid whole.

[0125] Figure 8 This is a first-view structural schematic diagram of the assembly of the second type of electrical connection copper busbar and the base in the battery management component of this application embodiment.

[0126] like Figure 1 , Figure 8 As shown, in some optional embodiments, the base 112 is provided with a limiting groove 1121, the limiting groove 1121 accommodating a portion of the electrical connection copper busbar 120; and / or,

[0127] The base 112 is also provided with a limiting boss 1122, which protrudes toward the electrical connection copper busbar 120. The limiting boss 1122 and the base 112 form a limiting space to accommodate another part of the electrical connection copper busbar 120.

[0128] It should be noted that the structural design of the limiting groove 1121 and the limiting boss 1122 enables multi-point and multi-directional limiting of the electrical connection copper busbar 120. This ensures that the electrical connection copper busbar 120 is accurately positioned and securely fixed during assembly and throughout its service life, and will not shift or loosen due to external forces or vibrations, thereby guaranteeing the stability and safety of the electrical connection.

[0129] Furthermore, in order to better position the electrical connection copper busbar 120 during the assembly process, a limiting groove 1121 can be provided on the base 112 to accommodate and position a part of the electrical connection copper busbar 120.

[0130] Furthermore, a limiting boss 1122 may be provided on the base 112. The limiting boss 1122 protrudes towards the electrical connection copper busbar 120 and forms a limiting space with the base 112 to accommodate and limit another part of the electrical connection copper busbar 120 and prevent it from shifting.

[0131] In some embodiments, a first limiting rib 1126 is provided at the external interface position of the base 112, and the first limiting rib 1126 limits the electrical connection copper busbar 120.

[0132] In some embodiments, the base 112 is provided with a second limiting rib 1127 and a third limiting rib 1128. The second limiting rib 1127 limits the X-direction of the main relay, and the third limiting rib 1128 limits the Y-direction of the main relay.

[0133] Figure 9 This is an assembly diagram of an electrical connection copper busbar, main relay, and shunt in the battery management component of this application embodiment. Figure 10 This is an assembly diagram of another type of electrical connection copper busbar, main relay, and shunt in the battery management component of this application embodiment.

[0134] like Figure 1 , Figure 9 as well as Figure 10 As shown, in some optional embodiments, the battery management component 100 also includes a shunt 150, which is electrically connected to the busbar 120, the main relay body 131, and the shunt 150.

[0135] It should be noted that by introducing the shunt 150 and connecting it to the electrical connection copper busbar 120 and the main relay body 131, a complete current acquisition function is integrated. This enables the battery management component 100 to monitor the main circuit current in real time, providing key data for battery management system state estimation (such as SOC), fault diagnosis, and overcurrent protection, thereby enhancing the management accuracy and safety of the battery pack.

[0136] In some embodiments, the battery management component 100 may further include a shunt 150. The shunt 150 is connected in series in the main circuit for accurately measuring the charge and discharge current. The electrical connection busbar 120, the main relay body 131, and the shunt 150 are electrically connected to each other to form a complete current path. The signal output terminal of the shunt 150 is also connected to the BMS board 140.

[0137] In some embodiments, the base 112 is provided with a fourth limiting rib 1129, which limits the flow divider 150.

[0138] In some embodiments, the electrical connection copper busbar 120, the main relay body 131, and the shunt 150 can be connected by bolts or by welding. If the electrical connection copper busbar 120 is bolted to the main relay body 131 and the shunt 150, then the electrical connection copper busbar 120 and the shunt 150 need to be electroplated.

[0139] If the electrical connection copper busbar 120, the main relay body 131 and the shunt 150 are connected by welding, then the electrical connection copper busbar 120 and the shunt 150 do not need to be electroplated and have their surfaces passivated.

[0140] Figure 11 This is a first-view structural diagram of the bracket in the battery management component according to an embodiment of this application. Figure 12 This is a second-view structural schematic diagram of the bracket in the battery management component according to an embodiment of this application.

[0141] like Figure 1 , Figure 11 and Figure 12 As shown, in some optional embodiments, the main relay assembly 130 further includes a bracket 132 having a slot 1321 in which the main relay body 131 is engaged; and / or,

[0142] The bracket 132 is provided with a fastener 1322, which is located in the slot 1321 to engage with the main relay body 131.

[0143] It should be noted that the design of the bracket 132, the slot 1321, and the clip 1322 provides an efficient and reliable fixing solution for the main relay that can be completed with only simple tools. The snap-fit ​​structure avoids the use of screws and other fasteners, simplifying the assembly process. At the same time, the cooperation between the slot 1321 and the clip can effectively absorb and buffer vibration energy, prevent the main relay body 131 from loosening, and improve its connection reliability under harsh working conditions.

[0144] In some embodiments, the main relay assembly 130 may further include a bracket 132. The bracket 132 is used to fix the main relay body 131. The bracket 132 has a slot 1321, in which the main relay body 131 can be inserted and locked. For a more secure fixation, the bracket 132 may also be provided with a resilient latching member 1322, which is located within the slot 1321. When the main relay body 131 is inserted into the slot 1321, the latching member 1322 engages with a corresponding structure (such as a latching groove) on the main relay body 131 to achieve locking.

[0145] In some embodiments, the bracket 132 is double-U-shaped, and one bracket 132 can fix two main relay bodies 131. The bracket 132 holds the main relay bodies 131 in the slot 1321 (inside the U-shaped opening). Utilizing the plastic elasticity of the buckle 1322, the buckle 1322 and the main relay bodies 131 are interference-fitted to fix the main relay bodies 131. The bracket 132 is fixed on the base 112.

[0146] Figure 13 This is a second-view structural diagram of the assembly of the second type of electrical connection copper busbar and the base in the battery management component of this application embodiment.

[0147] like Figure 1 , Figure 13 As shown, in some alternative embodiments, the battery management assembly 100 further includes a seal 160 surrounding the periphery of the base 112 and located on the side of the base 112 opposite to the top cover 111.

[0148] The battery management assembly 100 also includes an insulating element 170, which is attached to the side of the base 112 opposite to the top cover 111.

[0149] The battery management assembly 100 also includes a heat-conducting element 180, and the base 112 is provided with a mounting port 1123. The heat-conducting element 180 is assembled in the mounting port 1123 and abuts against the electrical connection copper busbar 120.

[0150] It should be noted that the BDU housing 110 provides excellent physical protection and insulation. The design of additional seals 160, insulators 170, and thermally conductive elements 180 further enhances the overall sealing protection level, electrical insulation performance, and heat dissipation capacity of the assembly, ensuring safe and stable operation under harsh conditions.

[0151] Furthermore, the seal 160 provides an interface seal between the battery pack housing and the battery pack housing, effectively preventing the intrusion of contaminants such as moisture and dust, thereby improving the overall protection level (IP rating) and environmental durability of the battery pack.

[0152] In some embodiments, the seal 160 may be made of an elastic material such as rubber, surround the periphery of the base 112, and be located on the side of the base 112 opposite to the top cover 111 (i.e., the bottom). When the entire battery management assembly 100 is mounted onto the battery pack housing, the seal is compressed, forming a seal between the two to prevent external moisture and dust from entering.

[0153] Furthermore, the insulating component 170 adds double insulation protection between the component and the external enclosure, greatly enhancing the electrical safety of the system and preventing leakage and short circuits.

[0154] In some embodiments, the insulating element 170 may be made of an insulating film material and attached to the side (bottom) of the base 112 opposite to the top cover 111 to provide an additional insulating protective layer for the base 112 and prevent short circuits with the housing or other conductive components.

[0155] Furthermore, the heat-conducting component 180 can quickly conduct the heat generated by the electrical connection copper busbar 120 when it is operating at high current to the external heat dissipation structure (such as liquid cooling plate), effectively reducing the temperature rise of key components, avoiding performance degradation or safety risks caused by overheating, and improving the power carrying capacity and lifespan of the components.

[0156] In some embodiments, the base 112 has a mounting opening 1123. A heat-conducting component 180 (such as a thermally conductive silicone pad, phase change material, etc.) is assembled in the mounting opening 1123. One end of the heat-conducting component 180 is in close contact with the electrical connection copper busbar 120 (especially in areas with high current and easy heat generation), while the other end can contact the liquid cooling plate of the battery pack, thereby efficiently conducting away the heat generated by the electrical connection copper busbar 120 and reducing temperature rise.

[0157] The battery management component provided in this application includes a BDU housing; an electrical connection copper busbar connected to the BDU housing, the electrical connection copper busbar having a data acquisition plug-in terminal; a main relay assembly assembled inside the BDU housing, the main relay assembly including a main relay body, the main relay body having a control plug-in terminal; and a BMS board, one end of the BMS board being electrically connected to the data acquisition plug-in terminal, and the other end of the BMS board being electrically connected to the control plug-in terminal.

[0158] By directly connecting the BMS board to both the acquisition pins of the electrical connection busbar and the control pins of the main relay, the internal electrical connection structure of the battery management component is simplified, space utilization is improved, and the complex wiring harnesses of traditional solutions are reduced. This not only reduces material costs and assembly time but also reduces potential failure risks and contact resistance caused by too many connection points, improving the reliability of signal acquisition and control command transmission, as well as the stability of the entire system.

[0159] In addition, this application embodiment also provides a battery pack, including a housing, a battery pack, a liquid cooling plate, and the aforementioned battery management component 100;

[0160] The battery pack is housed inside the enclosure, and the battery management component 100 is located inside the enclosure and abuts against the liquid cooling plate.

[0161] It should be noted that the liquid cooling plate dissipates heat from the electrical connection copper busbar 120 through the heat-conducting component 180, thereby dissipating heat from the relay body 131 and the shunt 150. As a result, the relay body 131 and the shunt 150 can be derated, reducing costs.

[0162] For example, a 400A relay body 131 and a 500A shunt 150 are generally required. However, when using a liquid cooling solution, a 300A relay body 131 and a 400A shunt 150 can be used, which can greatly reduce costs.

[0163] The battery pack includes a housing, a battery pack, and a battery management component 100 according to any of the above embodiments. The battery pack consists of multiple battery cells and is disposed inside the housing. The battery management component 100 is typically installed on the side wall or end of the housing, connected to the housing, and connected to the positive and negative terminals of the battery pack through components such as the internal electrical connection copper busbar 120, thereby achieving comprehensive management of the battery pack.

[0164] In some examples, the housing can be a rectangular structure, and the size of the housing can be greater than or equal to the size of the battery management component 100, so that the housing can support the battery management component 100.

[0165] Understandably, the enclosure is designed to support the battery management unit 100.

[0166] The dimensions of the aforementioned box can be set according to actual needs, and this application embodiment does not impose any further restrictions.

[0167] Additionally, it should be noted that this embodiment does not limit the shape of the box. For example, the box can be a regular shape such as a cuboid or a cylinder, or it can be other irregular shapes.

[0168] It should be noted that the specific structure of the battery management component 100 will not be limited here, but can be referred to the above.

[0169] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0170] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0171] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery management component (100), characterized in that, include: BDU housing (110); An electrical connection copper busbar (120) is connected to the BDU housing (110), and the electrical connection copper busbar (120) has a data acquisition insert end (1201). The main relay assembly (130) is assembled inside the BDU housing (110). The main relay assembly (130) includes a main relay body (131) having a control plug-in terminal (1311). BMS board (140), one end of which is electrically connected to the acquisition plug-in (1201), and the other end of which is electrically connected to the control plug-in (1311).

2. The battery management component (100) according to claim 1, characterized in that, The BMS board (140) has a first plug-in terminal (141) and a second plug-in terminal (142). The first plug-in terminal (141) is plugged into the acquisition plug-in terminal (1201), and the second plug-in terminal (142) is plugged into the control plug-in terminal (1311).

3. The battery management component (100) according to claim 1, characterized in that, The BMS board (140) is provided with multiple welding holes (143), and the acquisition insert end (1201) and the control insert end (1311) are respectively welded to the BMS board (140) through different welding holes (143).

4. The battery management component (100) according to any one of claims 1-3, characterized in that, The BDU housing (110) includes a top cover (111) and a base (112). The top cover (111) is disposed on the base (112), and the top cover (111) and the base (112) form a receiving cavity. The electrical connection copper busbar (120), the main relay assembly (130), and the BMS board (140) are respectively housed in the receiving cavity. The electrical connection copper busbar (120) is located on the base (112).

5. The battery management component (100) according to claim 4, characterized in that, The base (112) is a plastic part; The electrical connection copper busbar (120) and the base (112) are formed into one piece by injection molding.

6. The battery management component (100) according to claim 4, characterized in that, The base (112) is provided with a limiting groove (1121), the limiting groove (1121) accommodating a portion of the electrical connection copper busbar (120); and / or, The base (112) is also provided with a limiting boss (1122), which protrudes toward the electrical connection copper busbar (120). The limiting boss (1122) and the base (112) form a limiting space to accommodate another part of the electrical connection copper busbar (120).

7. The battery management component (100) according to any one of claims 1-3, characterized in that, The battery management assembly (100) also includes a shunt (150), which is connected to the electrical busbar (120), the main relay body (131), and the shunt (150).

8. The battery management assembly (100) according to any one of claims 1-3, characterized in that, The main relay assembly (130) further includes a bracket (132) having a slot (1321) in which the main relay body (131) is engaged; and / or, The bracket (132) is provided with a buckle (1322), which is located in the slot (1321) to engage with the main relay body (131).

9. The battery management component (100) according to claim 4, characterized in that, The battery management assembly (100) also includes a seal (160) surrounding the periphery of the base (112) and located on the side of the base (112) opposite to the top cover (111). The battery management assembly (100) also includes an insulating element (170) attached to the side of the base (112) opposite to the top cover (111); The battery management assembly (100) further includes a heat-conducting component (180), and the base (112) is also provided with a mounting port (1123). The heat-conducting component (180) is assembled in the mounting port (1123) and abuts against the electrical connection copper busbar (120).

10. A battery pack, characterized in that, It includes a housing, a battery pack, a liquid cooling plate, and a battery management component (100) as described in any one of claims 1 to 9. The battery pack is disposed inside the housing, and the battery management component (100) is located inside the housing and abuts against the liquid cooling plate.

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