BDU module, assembly method of BDU module, battery pack and electric equipment

Abstract

The invention discloses a BDU module, an assembly method of the BDU module, a battery pack and electric equipment, and the BDU module comprises a voltage division relay core body which is provided with a first low-voltage terminal and a second low-voltage terminal; the N-line relay core body is connected with the voltage division relay core body, and the N-line relay core body is provided with a third low-voltage terminal and a fourth low-voltage terminal; the PCB electrical board is provided with a voltage division relay low-voltage power supply loop and an N-line relay low-voltage power supply loop, and the first low-voltage terminal and the second low-voltage terminal are connected with the PCB electrical board and are connected in the voltage division relay low-voltage power supply loop; and the third low-voltage terminal and the fourth low-voltage terminal are connected with the PCB electrical board and are connected in an N-line relay low-voltage power supply loop. According to the BDU module, the risk of line errors and faults is reduced, the manufacturing cost is reduced, the assembly efficiency is improved, and the integration level is high.

Description

Technical Field

[0001] The present invention relates to the field of battery technology, and in particular to a BDU module, an assembly method of a BDU module, a battery pack and an electrical device. Background Art

[0002] In the relevant technologies, the battery pack plays the role of the core power source in new energy vehicles. Its performance, especially the endurance (energy density), reliability and manufacturing cost, directly determines the market potential and sustainable development of electric vehicle technology. As the core component of battery management, the battery pack circuit breaker unit (BDU) undertakes a vital task. It performs precise monitoring of voltage and current, conducts continuous insulation status inspection, ensures the efficiency and control of power transmission, data exchange and the execution of diagnostic functions. The stability and efficiency of the BDU are directly related to the efficiency and safety of the entire system, especially the pre-charging process, which is a key guarantee link for the safety of the high-voltage system. The new BDU can realize the functions of voltage division and self-heating of the power battery pack through different internal relays and the battery management system (BMS).

[0003] In traditional solutions, electrical connections rely on dense harness components and connectors. The harness design contains multiple independent components, such as plugs, connectors, terminals, wires, and auxiliary materials. These components are combined together to form a harness. This structure increases the probability of failure because the failure of a single part will directly affect the performance of the entire system, resulting in reduced reliability, high manufacturing costs, low efficiency, and inconvenience in integration. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a BDU module, which reduces the risk of line error failure, reduces manufacturing costs, improves assembly efficiency, and has high integration.

[0005] The present invention also provides a BDU module assembly method, which is applicable to the above-mentioned BDU module.

[0006] The present invention also provides a battery pack, which includes the above-mentioned BDU module.

[0007] The present invention further provides an electrical device, which includes the above-mentioned battery pack.

[0008] According to an embodiment of the present invention, the BDU module includes: a voltage-dividing relay core, the voltage-dividing relay core has a first low-voltage terminal and a second low-voltage terminal; an N-line relay core, the N-line relay core is connected to the voltage-dividing relay core, the N-line relay core has a third low-voltage terminal and a fourth low-voltage terminal; a PCB electrical board, the PCB electrical board has a voltage-dividing relay low-voltage power supply circuit and an N-line relay low-voltage power supply circuit, the first low-voltage terminal and the second low-voltage terminal are connected to the PCB electrical board and connected to the voltage-dividing relay low-voltage power supply circuit, and the third low-voltage terminal and the fourth low-voltage terminal are connected to the PCB electrical board and connected to the N-line relay low-voltage power supply circuit.

[0009] According to the BDU module of the embodiment of the present invention, by setting the first low-voltage terminal and the second low-voltage terminal on the voltage-dividing relay core, setting the third low-voltage terminal and the fourth low-voltage terminal on the N-line relay core, and setting the voltage-dividing relay low-voltage power supply circuit and the N-line relay low-voltage power supply circuit on the PCB electrical board, the first low-voltage terminal and the second low-voltage terminal are connected to the PCB electrical board and connected to the voltage-dividing relay low-voltage power supply circuit, the third low-voltage terminal and the fourth low-voltage terminal are connected to the PCB electrical board and connected to the N-line relay low-voltage power supply circuit, the low-voltage wiring harness and connectors between the voltage-dividing relay core and the voltage-dividing relay low-voltage power supply circuit and between the N-line relay core and the N-line relay low-voltage power supply circuit can be reduced, the risk of line error failure is reduced, the manufacturing cost is reduced, the assembly efficiency is improved, and the integration is high.

[0010] According to some embodiments of the present invention, at least one of the first low voltage terminal, the second low voltage terminal, the third low voltage terminal and the fourth low voltage terminal is inserted into the PCB electrical board.

[0011] According to some embodiments of the present invention, the present invention further includes: a first connecting copper bar, wherein two ends of the first connecting copper bar are respectively connected to the N-line relay core and the voltage-dividing relay core through fasteners.

[0012] According to some embodiments of the present invention, the present invention further includes: a fourth connecting copper bar connected to the N-line relay core through a fastener.

[0013] According to some embodiments of the present invention, the N-line relay core has a first auxiliary contact terminal and a second auxiliary contact terminal, the PCB electrical board has an auxiliary contact loop, the first auxiliary contact terminal and the second auxiliary contact terminal are connected to the PCB electrical board and to the auxiliary contact loop.

[0014] In some embodiments of the present invention, at least one of the first auxiliary contact terminal and the second auxiliary contact terminal is inserted into the PCB electrical board.

[0015] According to some embodiments of the present invention, the PCB electrical board has a high-voltage sampling circuit, and the BDU module also includes: a safety device, which is connected to the voltage-dividing relay core; a high-voltage sampling copper bus, which is connected to the safety device and the PCB electrical board and is connected to the high-voltage sampling circuit.

[0016] In some embodiments of the present invention, the high-voltage sampling copper busbar has a plug-in portion, and the plug-in portion is plugged into the PCB electrical board.

[0017] In some embodiments of the present invention, it further comprises: a second connecting copper bar, wherein two ends of the second connecting copper bar are respectively connected to the safety device and the voltage-sharing relay core through fasteners.

[0018] In some embodiments of the present invention, it also includes: a third connecting copper bar, the third connecting copper bar is connected to the high-voltage sampling copper bar, and the third connecting copper bar and the high-voltage sampling copper bar are connected to the safety device through fasteners.

[0019] In some embodiments of the present invention, it also includes: a shell, the shell has an installation cavity, one side of the installation cavity is open to form an opening, the PCB electrical board is arranged at the opening to seal the opening, the voltage divider relay core, the N line relay core, the safety device and the high-voltage sampling copper bus are fixed in the installation cavity.

[0020] In some embodiments of the present invention, the opening is located on one side of the shell in the thickness direction, and the N-line relay core, the voltage-dividing relay core, the safety device and the high-voltage sampling copper bus are arranged in sequence along the length direction of the installation cavity.

[0021] In some embodiments of the present invention, the shell has a glue potting structure, which is used to fix the N-line relay core and the voltage-sharing relay core; and / or the safety device and the high-voltage sampling copper bus are fixed in the installation cavity by fasteners.

[0022] In some embodiments of the present invention, the housing has an avoidance hole, and the avoidance hole is arranged opposite to the fasteners connecting the voltage-sharing relay core, the N-line relay core, the safety device and the high-voltage sampling copper busbar.

[0023] In some embodiments of the present invention, it further includes: a sealing plug, each of the avoidance holes is provided with a sealing plug for sealing the avoidance hole.

[0024] According to the assembly method of a BDU module of an embodiment of the present invention, the BDU module is the above-mentioned BDU module, and the BDU module further includes a housing, the housing has an installation cavity, and one side of the installation cavity is opened to form an opening, and the assembly method includes:

[0025] Placing the voltage-sharing relay core and the N-line relay core in the installation cavity;

[0026] Injecting fixing glue into the installation cavity to fix the voltage-sharing relay core and the N-line relay core;

[0027] The PCB electrical board is arranged at the opening, and the connecting terminals on the voltage-sharing relay core and the N-line relay core are clamped into the sockets on the PCB electrical board;

[0028] The connecting terminal is connected to the PCB electrical board by welding.

[0029] According to the assembly method of the BDU module of the embodiment of the present invention, the voltage-dividing relay core and the N-line relay core are first placed in a shell, and then glue is poured into the shell to fix the voltage-dividing relay core and the N-line relay core. A PCB electrical board is arranged at the opening and the connecting terminals on the voltage-dividing relay core and the N-line relay core are clamped and welded to connect. During the BDU assembly process, the voltage-dividing relay core and the N-line relay core can be fixed in advance, which is convenient for the assembly of the BDU module and improves the assembly efficiency.

[0030] A battery pack according to an embodiment of the present invention includes the above-mentioned BDU module.

[0031] According to the battery pack of the embodiment of the present invention, the third low-voltage terminal and the fourth low-voltage terminal are arranged on the N-line relay core, and the voltage-dividing relay low-voltage power supply circuit and the N-line relay low-voltage power supply circuit are arranged on the PCB electrical board, the first low-voltage terminal and the second low-voltage terminal are connected to the PCB electrical board and connected to the voltage-dividing relay low-voltage power supply circuit, the third low-voltage terminal and the fourth low-voltage terminal are connected to the PCB electrical board and connected to the N-line relay low-voltage power supply circuit, the low-voltage wiring harness and connectors between the voltage-dividing relay core and the voltage-dividing relay low-voltage power supply circuit and between the N-line relay core and the N-line relay low-voltage power supply circuit can be reduced, the risk of line error failure is reduced, the manufacturing cost is reduced, the assembly efficiency is improved, and the integration is high.

[0032] An electric device according to an embodiment of the present invention includes the above-mentioned battery pack.

[0033] According to the electrical equipment of the embodiment of the present invention, by setting the above-mentioned battery pack, the battery pack includes the above-mentioned BDU module, the first low-voltage terminal and the second low-voltage terminal are set on the voltage-dividing relay core, the third low-voltage terminal and the fourth low-voltage terminal are set on the N-line relay core, and the voltage-dividing relay low-voltage power supply circuit and the N-line relay low-voltage power supply circuit are set on the PCB electrical board, the first low-voltage terminal and the second low-voltage terminal are connected to the PCB electrical board and connected to the voltage-dividing relay low-voltage power supply circuit, the third low-voltage terminal and the fourth low-voltage terminal are connected to the PCB electrical board and connected to the N-line relay low-voltage power supply circuit, the low-voltage wiring harness and connectors between the voltage-dividing relay core and the voltage-dividing relay low-voltage power supply circuit and between the N-line relay core and the N-line relay low-voltage power supply circuit can be reduced, the risk of line error failure is reduced, the manufacturing cost is reduced, the assembly efficiency is improved, and the integration is high.

[0034] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0036] Figure 1 is a perspective view of a BDU module according to an embodiment of the present invention;

[0037] Figure 2 is an exploded diagram of a BDU module according to an embodiment of the present invention;

[0038] Figure 3 is a schematic diagram of a BDU module according to an embodiment of the present invention;

[0039] Figure 4 yes Figure 2 Enlarged view of point A in the middle.

[0040] Reference numerals:

[0041] 100. BDU module;

[0042] 1. Shell; 11. Opening; 12. Avoidance hole;

[0043] 2. Voltage-dividing relay core; 21. First low-voltage terminal; 22. Second low-voltage terminal;

[0044] 3. N line relay core; 31. third low voltage terminal; 32. fourth low voltage terminal; 33. first auxiliary contact terminal; 34. second auxiliary contact terminal;

[0045] 4. PCB electrical board; 41. jack; 42. recessed portion;

[0046] 5. Safety device;

[0047] 6. High-voltage sampling copper busbar; 61. Connecting part;

[0048] 71, first connecting copper bar; 72, second connecting copper bar; 73, third connecting copper bar; 74, fourth connecting copper bar;

[0049] 8. Fasteners; 9. Sealing plugs. DETAILED DESCRIPTION

[0050] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0051] In the description of the present invention, 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 positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0052] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] Reference below Figure 1-Figure 3 A BDU module 100 according to an embodiment of the present invention is described.

[0054] like Figure 1-Figure 3 As shown, the BDU module 100 according to the embodiment of the present invention includes a voltage-sharing relay core 2 , an N-line relay core 3 and a PCB electrical board 4 .

[0055] Specifically, the voltage-dividing function of the battery pack is to divide the input voltage into two parts or multiple levels through a voltage-dividing relay, thereby generating a stable, measurable low voltage at the output end, which is convenient for instrument reading or precise control of electronic equipment. It can also be used for signal transmission to protect equipment and personnel safety. It can also be used for fault detection. By comparing the voltage after voltage division, the change of input voltage can be detected for fault diagnosis or protection circuit, such as automatic disconnection when the high voltage exceeds a predetermined value.

[0056] The self-heating function of the battery pack is to open and close the heating element when the N-line relay receives a specific pulse signal to achieve periodic pulse heating. For example, when preheating the engine, it may be powered on for a short time at a fixed time to avoid energy waste caused by continuous high temperature, extend the life of the equipment, prevent overheating, and avoid overheating damage caused by heating elements working for a long time when it is not necessary, so as to ensure the safety of the equipment. Pulse heating can automatically stop after the temperature reaches the set value, ensuring that the heating object reaches the precise temperature required. When the heating equipment fails, the N-line relay can act as a protection device to stop heating and prevent the fault from further expanding.

[0057] The voltage-sharing relay core 2 has a first low-voltage terminal 21 and a second low-voltage terminal 22. The voltage-sharing relay core 2 may have a first static contact, a first moving contact, and a first coil for driving the first moving contact to move. The first low-voltage terminal 21 and the second low-voltage terminal 22 may be connected to the two ends of the first coil respectively. When the first coil is energized, the first moving contact may be in contact with or disconnected from the first static contact. The first static contact and the first moving contact may both be one or the first static contact and the first moving contact may both be two corresponding ones.

[0058] The N-line relay core 3 is connected to the voltage-sharing relay core 2, and the N-line relay core 3 has a third low-voltage terminal 31 and a fourth low-voltage terminal 32. The N-line relay core 3 may have a second static contact, a second moving contact, and a second coil for driving the second moving contact to move. The third low-voltage terminal 31 and the fourth low-voltage terminal 32 may be connected to the two ends of the second coil respectively, and the second moving contact may be in contact with or disconnected from the second static contact when the second coil is energized. The second static contact and the second moving contact may both be one, or the second static contact and the second moving contact may both be two corresponding ones.

[0059] The PCB electrical board 4 is provided with a voltage-dividing relay low-voltage power supply circuit and an N-line relay low-voltage power supply circuit. The first low-voltage terminal 21 and the second low-voltage terminal 22 are connected to the PCB electrical board 4 and are connected to the voltage-dividing relay low-voltage power supply circuit. The third low-voltage terminal 31 and the fourth low-voltage terminal 32 are connected to the PCB electrical board 4 and are connected to the N-line relay low-voltage power supply circuit. In this way, the voltage-dividing relay core 2 can be connected to the PCB electrical board 4 through the first low-voltage terminal 21 and the second low-voltage terminal 22, and the N-line relay core 3 can be connected to the PCB electrical board 4 through the third low-voltage terminal 31 and the fourth low-voltage terminal 32. The N-line relay core 3 and the voltage-dividing relay core 2 are powered and signals are read by the electrical circuit inside the PCB electrical board 4. The voltage-dividing relay core 2 and the N-line relay core 3 do not need to be connected to conduct the voltage-dividing relay low-voltage power supply circuit and the N-line relay low-voltage power supply circuit through a wiring harness and a connector, which reduces the risk of line errors and faults, reduces manufacturing costs, improves assembly efficiency, and has a high degree of integration.

[0060] Among them, the first low-voltage terminal 21, the second low-voltage terminal 22, the third low-voltage terminal 31 and the fourth low-voltage terminal 32 can be copper sheets, the first low-voltage terminal 21 and the second low-voltage terminal 22 can be integrated with the voltage-dividing relay core 2, and the third low-voltage terminal 31 and the fourth low-voltage terminal 32 can be integrated with the N-line relay core 3.

[0061] In addition, the first low-voltage terminal 21 and the second low-voltage terminal 22 are welded to the PCB electrical board 4, and the third low-voltage terminal 31 and the fourth low-voltage terminal 32 are welded to the PCB electrical board 4. For example, the first low-voltage terminal 21, the second low-voltage terminal 22, the third low-voltage terminal 31 and the fourth low-voltage terminal 32 are fixed to the PCB electrical board 4 by wave soldering.

[0062] According to the BDU module 100 of the embodiment of the present invention, by setting the first low-voltage terminal 21 and the second low-voltage terminal 22 on the voltage-dividing relay core 2, setting the third low-voltage terminal 31 and the fourth low-voltage terminal 32 on the N-line relay core 3, and setting the voltage-dividing relay low-voltage power supply circuit and the N-line relay low-voltage power supply circuit on the PCB electrical board 4, the first low-voltage terminal 21 and the second low-voltage terminal 22 are connected to the PCB electrical board 4 and connected to the voltage-dividing relay low-voltage power supply circuit, the third low-voltage terminal 31 and the fourth low-voltage terminal 32 are connected to the PCB electrical board 4 and connected to the N-line relay low-voltage power supply circuit, the low-voltage wiring harness and connectors between the voltage-dividing relay core 2 and the voltage-dividing relay low-voltage power supply circuit and between the N-line relay core 3 and the N-line relay low-voltage power supply circuit can be reduced, the risk of line error failure is reduced, the manufacturing cost is reduced, the assembly efficiency is improved, and the integration is high.

[0063] In some embodiments of the present invention, Figure 1 As shown, combined Figure 2 At least one of the first low voltage terminal 21, the second low voltage terminal 22, the third low voltage terminal 31 and the fourth low voltage terminal 32 is inserted on the PCB electrical board 4. This facilitates the connection between the first low voltage terminal 21, the second low voltage terminal 22, the third low voltage terminal 31 and the fourth low voltage terminal 32 and the PCB electrical board 4.

[0064] For example, in Figure 1 and Figure 2 In the example shown, the PCB electrical board 4 is provided with sockets 41 corresponding to the first low-voltage terminal 21, the second low-voltage terminal 22, the third low-voltage terminal 31 and the fourth low-voltage terminal 32, respectively. The first low-voltage terminal 21, the second low-voltage terminal 22, the third low-voltage terminal 31 and the fourth low-voltage terminal 32 are respectively inserted into the corresponding sockets 41. Figure 4 As shown, combined Figure 2 The first low-voltage terminal 21, the second low-voltage terminal 22, the third low-voltage terminal 31 and the fourth low-voltage terminal 32 are strip-shaped sheet structures, the socket 41 is a strip-shaped hole, and recessed portions 42 are provided on the two inner walls opposite to each other in the width direction of the socket 41. There are multiple recessed portions 42, for example, two, arranged at intervals along the length direction of the socket 41, thereby facilitating the insertion of the first low-voltage terminal 21, the second low-voltage terminal 22, the third low-voltage terminal 31 and the fourth low-voltage terminal 32 into the socket 41, and facilitating the formation of more solder in the socket 41, thereby ensuring the reliability of the connection between the PCB electrical board 4 and the first low-voltage terminal 21, the second low-voltage terminal 22, the third low-voltage terminal 31 and the fourth low-voltage terminal 32.

[0065] In some embodiments of the present invention, Figure 2 As shown, combined Figure 3 The BDU module 100 further includes a first connecting copper bar 71, and the two ends of the first connecting copper bar 71 are respectively connected to the N-line relay core 3 and the voltage-sharing relay core 2 through fasteners 8. Thus, the N-line relay core 3 and the voltage-sharing relay core 2 can be connected through the first connecting copper bar 71, which facilitates the connection between the N-line relay core 3 and the voltage-sharing relay core 2, and the wiring harness and connector between the N-line relay core 3 and the voltage-sharing relay core 2 can be omitted, further reducing the risk of line error failure, reducing manufacturing costs, improving assembly efficiency, and further improving integration.

[0066] like Figure 2 As shown, the first connecting copper bus 71 is T-shaped, and the first connecting copper bus 71 includes a first connecting part and a second connecting part, the two ends of the first connecting part in the length direction are respectively connected to the N line relay core 3 and the voltage divider relay core 2, the second connecting part is perpendicular to the first connecting part to form a T shape, one end of the second connecting part is connected to the first connecting part, and the other end is bent for connection to the positive pole of the battery.

[0067] In some embodiments of the present invention, Figure 2 As shown, combined Figure 3 , the BDU module 100 also includes a fourth connecting copper bar 74, which is connected to the N line relay core 3 through a fastener 8. It can be understood that one end of the fourth connecting copper bar 74 is connected to the N line relay core 3 through a fastener 8, and the other end is used to connect the N line, thereby facilitating the connection between the N line relay core 3 and the N line, and the wiring harness and connector between the N line relay core 3 and the N line can be omitted, further reducing the risk of line error failure, reducing manufacturing costs, improving assembly efficiency, and further improving integration. Among them, the fourth connecting copper bar 74 is formed in an L shape.

[0068] In some embodiments of the present invention, Figure 1-Figure 3 As shown, the N-line relay core 3 has a first auxiliary contact terminal 33 and a second auxiliary contact terminal 34, and the PCB electrical board 4 has an auxiliary contact circuit, and the first auxiliary contact terminal 33 and the second auxiliary contact terminal 34 are connected to the PCB electrical board 4 and connected to the auxiliary contact circuit. In this way, the first auxiliary contact terminal 33 and the second auxiliary contact terminal 34 of the N-line relay core 3 can be connected to the PCB electrical board 4, and the electrical circuit inside the PCB electrical board 4 can supply power to the N-line relay core 3 and read signals. The N-line relay core 3 does not need to be connected to the auxiliary contact circuit through a wiring harness and a connector, which reduces the risk of line errors and faults, reduces manufacturing costs, improves assembly efficiency, and has a high degree of integration.

[0069] The first auxiliary contact terminal 33 and the second auxiliary contact terminal 34 can be connected to a measuring device on the N-line relay core 3 for measuring the current, voltage or temperature of the N-line relay core 3 to supply power to the measuring device.

[0070] In some embodiments of the present invention, Figure 1 As shown, combined Figure 2 At least one of the first auxiliary contact terminal 33 and the second auxiliary contact terminal 34 is inserted on the PCB electrical board 4. This facilitates the connection between the first auxiliary contact terminal 33 and the second auxiliary contact terminal 34 and the PCB electrical board 4. The first auxiliary contact terminal 33 and the second auxiliary contact terminal 34 are welded to the PCB electrical board 4, specifically by wave soldering.

[0071] For example, in Figure 1 and Figure 2 In the example shown, the PCB electrical board 4 is provided with sockets 41 corresponding to the first auxiliary contact terminal 33 and the second auxiliary contact terminal 34, and the first auxiliary contact terminal 33 and the second auxiliary contact terminal 34 are respectively inserted into the corresponding sockets 41. Figure 4 As shown, combined Figure 2 The structures of the multiple jacks 41 are the same. The jacks 41 are bar-shaped holes. Recesses 42 are provided on the two inner walls opposite to each other in the width direction of the jacks 41. There are multiple, for example, two, recesses 42 spaced apart along the length direction of the jacks 41, thereby facilitating the insertion of the first auxiliary contact terminal 33 and the second auxiliary contact terminal 34 into the jacks 41 and facilitating the formation of more solder in the jacks 41, thereby ensuring the reliability of the connection between the PCB electrical board 4 and the first auxiliary contact terminal 33 and the second auxiliary contact terminal 34.

[0072] In some embodiments of the present invention, Figure 2 and Figure 3 As shown, there is a high-voltage sampling circuit on the PCB electrical board 4, and the BDU module 100 also includes a safety device 5 and a high-voltage sampling copper bus 6. The safety device 5 has a fuse. The safety device 5 of the present application can be a passive safety device. The safety device 5 is connected to the voltage-dividing relay core 2, and the high-voltage sampling component is connected to the safety device 5 and the PCB electrical board 4 and is connected to the high-voltage sampling circuit. The present application sets the existing high-voltage sampling harness in the form of a copper busbar, and then connects it to the PCB electrical board 4. The electrical appliance and the battery management system (BMS) can directly collect the voltage signal on the circuit through the PCB electrical board 4. There is no need to set a high-voltage sampling harness, which reduces the risk of line errors and failures, reduces manufacturing costs, improves assembly efficiency, and has a high degree of integration.

[0073] In some embodiments of the present invention, the high-voltage sampling copper busbar 6 has a plug-in portion 61, and the plug-in portion 61 is plugged into the PCB electrical board 4. This facilitates the connection between the high-voltage sampling copper busbar 6 and the PCB electrical board 4. The high-voltage sampling copper busbar 6 is welded to the PCB electrical board 4, specifically by wave soldering.

[0074] For example, in Figure 1 and Figure 2 In the example shown, the PCB electrical board 4 is provided with a socket 41 corresponding to the high-voltage sampling copper busbar 6, and the plug-in portion 61 of the high-voltage sampling copper busbar 6 is inserted into the corresponding socket 41. Figure 4 As shown, combined Figure 2 The structures of multiple jacks 41 are the same. The jacks 41 are bar-shaped holes. Recesses 42 are provided on two inner walls opposite to each other in the width direction of the jacks 41. There are multiple, for example, two, recesses 42 spaced apart along the length direction of the jacks 41. This facilitates the insertion of the plug-in portion 61 of the high-voltage sampling copper bus 6 into the jacks 41 and facilitates the formation of more solder in the jacks 41, thereby ensuring the reliability of the connection between the PCB electrical board 4 and the high-voltage sampling copper bus 6.

[0075] In some embodiments of the present invention, Figure 2 As shown, combined Figure 3The BDU module 100 further includes a second connecting copper bar 72, and the two ends of the second connecting copper bar 72 are respectively connected to the safety device 5 and the voltage-sharing relay core 2 through fasteners 8. Thus, the safety device 5 and the voltage-sharing relay core 2 can be connected through the second connecting copper bar 72, which facilitates the connection between the safety device 5 and the voltage-sharing relay core 2, and the wiring harness and connector between the safety device 5 and the voltage-sharing relay core 2 can be omitted, further reducing the risk of line error failure, reducing manufacturing costs, improving assembly efficiency, and further improving integration.

[0076] In some embodiments of the present invention, the BDU module 100 further includes a third connecting copper bar 73, which is connected to the high-voltage sampling copper bar 6, and the third connecting copper bar 73 and the high-voltage sampling copper bar 6 are connected to the insurance device 5 through a fastener 8. The third connecting copper bar 73 can be used to connect to the negative electrode of the battery, thereby facilitating the connection between the insurance device 5 and the negative electrode of the battery.

[0077] In addition, the high-voltage sampling copper bus 6 and the third connecting copper bus 73 are connected to the safety device 5 through a fastener 8. The fastener 8 is simultaneously passed through the third connecting copper bus 73 and the high-voltage sampling copper bus 6 and then connected to the safety device 5, thereby reducing the number of parts and facilitating assembly.

[0078] In the related technology, the traditional solution consists of a low-voltage wiring harness (N-line relay and voltage-dividing relay low-voltage end), an auxiliary contact wiring harness (N-line relay and voltage-dividing relay low-voltage end auxiliary contact wiring harness), a high-voltage wiring harness (high-voltage connector wiring harness), a high-voltage connector, a fuse, an N-line relay, a voltage-dividing relay, four different specifications of bolts, connecting copper bars, and plastic parts. The components need to transmit current through a wiring harness. There are many materials, the assembly is cumbersome, the labor cost is high, the assembly process is complicated, and large-scale automated mass production is impossible.

[0079] In the present application, a PCB electrical board 4 is provided, on which a voltage divider relay low-voltage power supply circuit, an N-line relay low-voltage power supply circuit, and a high-voltage sampling circuit are integrated; the voltage divider relay core 2 is connected to the PCB electrical board 4 via a first low-voltage terminal 21 and a second low-voltage terminal 22; the N-line relay core 3 is connected to the PCB electrical board 4 via a third low-voltage terminal 31 and a fourth low-voltage terminal 32; the high-voltage sampling harness is designed to be connected to the PCB electrical board 4 via a high-voltage sampling copper bus 6, and a first connecting copper bus 71, a second connecting copper bus 72, a third connecting copper bus 73, and a fourth connecting copper bus 74 are provided for connection between the components; the risk of line error failure is low, the manufacturing cost is low, the assembly efficiency is high, and the integration is high.

[0080] In some embodiments of the present invention, Figure 1 and Figure 2As shown, the BDU module 100 also includes a housing 1, the housing 1 has an installation cavity, one side of the installation cavity is open to form an opening 11, a PCB electrical board 4 is arranged at the opening 11 to block the opening 11, and the voltage-dividing relay core 2, the N-line relay core 3, the safety device 5 and the high-voltage sampling copper bus 6 are fixedly arranged in the installation cavity. The housing 1 can protect the internal voltage-dividing relay core 2, the N-line relay core 3, the safety device 5 and the high-voltage sampling copper bus 6, wherein the PCB electrical board 4 is arranged at the opening 11 and can be used as a part of the shell to protect the internal parts, thereby reducing the material cost of the housing 1 and reducing the occupied space of the housing 1. In addition, the present application directly arranges the voltage-dividing relay core 2 and the N-line relay core 3 in the housing 1, and merges the shells of the N-line relay and the voltage-dividing relay with the housing 1 to form the housing 1 of the BDU module 100, thereby reducing the number of assembled parts, optimizing the structure, reducing costs, and improving the integration of the BDU module 100.

[0081] Optionally, the housing 1 is a plastic part, which has good insulation, low cost and is easy to process.

[0082] In some embodiments of the present invention, Figure 2 As shown, the opening 11 is located on one side of the thickness direction of the housing 1, and the N-line relay core 3, the voltage-dividing relay core 2, the safety device 5 and the high-voltage sampling copper bus 6 are sequentially arranged along the length direction of the installation cavity. This can make the arrangement of the N-line relay core 3, the voltage-dividing relay core 2, the safety device 5 and the high-voltage sampling copper bus 6 in the housing 1 more reasonable and compact, and facilitate the connection between the various components.

[0083] Of course, the present invention is not limited thereto. Different N-line relay cores 3 and voltage-dividing relay cores 2 may be selected according to the specific BDU module 100 selection, and the above-mentioned structural arrangement may be changed to adjust the size and installation method of the BDU module 100.

[0084] In some embodiments of the present invention, the housing 1 has a glue pouring structure, which is used to fix the N-line relay core 3 and the voltage-dividing relay core 2. It is understandable that when the BDU module 100 is assembled, the N-line relay core 3 and the voltage-dividing relay core 2 can be placed in the housing 1, and then glue can be poured into the housing 1. After the poured glue is cured, the N-line relay core 3 and the voltage-dividing relay core 2 can be fixed in the housing 1.

[0085] In some embodiments of the present invention, Figure 2 As shown, the safety device 5 and the high-voltage sampling copper bar 6 are fixed in the installation cavity by fasteners 8. This facilitates the fixing of the safety device 5 and the high-voltage sampling copper bar 6 on the housing 1, and at the same time can improve the reliability of the fixing of the safety device 5 and the high-voltage sampling copper bar 6.

[0086] In some embodiments of the present invention, Figure 2 As shown, the housing 1 has an avoidance hole 12, and the avoidance hole 12 is arranged opposite to the fastener 8 connecting the voltage-sharing relay core 2, the N-line relay core 3, the safety device 5 and the high-voltage sampling copper bus 6. When the BDU module 100 is assembled, the voltage-sharing relay core 2, the N-line relay core 3, the safety device 5 and the high-voltage sampling copper bus 6 and the connecting copper bus (the first connecting copper bus 71, the second connecting copper bus 72, the third connecting copper bus 73 and the fourth connecting copper bus 74) can be first placed in the housing 1, and then the fastener 8 can be fixed and connected through the avoidance hole 12 on the outside of the housing 1, and the connection between each component and the housing 1 can be achieved at the same time.

[0087] Furthermore, if Figure 1 and Figure 2 As shown, the BDU module 100 further includes a sealing plug 9, and each avoidance hole 12 is provided with a sealing plug 9 for blocking the avoidance hole 12. This can prevent the avoidance hole 12 from entering dust or liquid such as water, and better protect the internal components of the housing 1.

[0088] The following describes an assembly method of a BDU module 100 according to an embodiment of the present invention, wherein the BDU module 100 is the above-mentioned BDU module 100, and the BDU module 100 further includes a housing 1, the housing 1 has an installation cavity, one side of the installation cavity is opened to form an opening 11, and the assembly method includes:

[0089] Place the voltage divider relay core 2 and the N line relay core 3 in the installation cavity;

[0090] Inject fixing glue into the installation cavity to fix the voltage divider relay core 2 and the N line relay core 3;

[0091] The PCB electrical board 4 is arranged at the opening 11, and the connection terminals on the voltage divider relay core 2 and the N line relay core 3 are clamped into the sockets 41 on the PCB electrical board 4;

[0092] The connecting terminal and the PCB electrical board 4 are connected by welding, for example, by wave soldering.

[0093] Therefore, during the BDU assembly process, the voltage divider relay core 2 and the N line relay core 3 can be fixed in advance, which facilitates the assembly of the BDU module 100.

[0094] According to the assembly method of the BDU module 100 of the embodiment of the present invention, the voltage-dividing relay core 2 and the N-line relay core 3 are first placed in the housing 1, and then glue is poured into the housing 1 to fix the voltage-dividing relay core 2 and the N-line relay core 3. The PCB electrical board 4 is arranged at the opening 11 and the connecting terminals on the voltage-dividing relay core 2 and the N-line relay core 3 are clamped and welded to connect. During the BDU assembly process, the voltage-dividing relay core 2 and the N-line relay core 3 can be fixed in advance, which facilitates the assembly of the BDU module 100 and improves the assembly efficiency.

[0095] In some embodiments of the present invention, when the BDU module 100 includes a safety device 5, a high-voltage sampling copper busbar 6, and first to fourth connecting copper busbars, before the PCB board is set at the opening 11, the assembly method of the BDU module 100 also includes placing the safety device 5, the high-voltage sampling copper busbar 6, and the first to fourth connecting copper busbars in the shell 1, connecting the third connecting copper busbar 73, the high-voltage sampling copper busbar 6, and the safety device 5 to the shell 1 through a fastener 8, connecting the second connecting copper busbar 72 and the safety device 5 to the shell 1 through a fastener 8, connecting the second connecting copper busbar 72 and the voltage divider relay core 2 through a fastener 8, connecting the first connecting copper busbar 71 and the voltage divider relay core 2 through a fastener 8, connecting the first connecting copper busbar 71 and the N line relay core 3 through a fastener 8, and connecting the fourth connecting copper busbar 74 to the N line relay core 3 through a fastener 8, and a total of six fasteners 8 are used to connect the various components.

[0096] The housing 1 has avoidance holes 12 for avoiding the six fasteners 8 , and the six fasteners 8 are installed through the six avoidance holes 12 respectively.

[0097] After all components are installed in the housing 1, the PCB is placed at the opening 11, and the first auxiliary contact terminal 33 and the second auxiliary contact terminal 34 of the N-line relay core 3 and the plug-in portion 61 of the high-voltage sampling copper bus 6 are clamped into the socket 41 of the PCB electrical board 4 and welded together.

[0098] Finally, the sealing plug 9 is arranged at the avoidance hole 12 to block the avoidance hole 12 .

[0099] A battery pack according to an embodiment of the present invention is described below.

[0100] The battery pack according to the embodiment of the present invention includes the above-mentioned BDU module 100 .

[0101] According to the battery pack of the embodiment of the present invention, by setting the above-mentioned BDU module 100, a first low-voltage terminal 21 and a second low-voltage terminal 22 are set on the voltage-dividing relay core 2, a third low-voltage terminal 31 and a fourth low-voltage terminal 32 are set on the N-line relay core 3, and a voltage-dividing relay low-voltage power supply circuit and an N-line relay low-voltage power supply circuit are set on the PCB electrical board 4. The first low-voltage terminal 21 and the second low-voltage terminal 22 are connected to the PCB electrical board 4 and connected to the voltage-dividing relay low-voltage power supply circuit, and the third low-voltage terminal 31 and the fourth low-voltage terminal 32 are connected to the PCB electrical board 4 and connected to the N-line relay low-voltage power supply circuit. The low-voltage wiring harness and connectors between the voltage-dividing relay core 2 and the voltage-dividing relay low-voltage power supply circuit and between the N-line relay core 3 and the N-line relay low-voltage power supply circuit can be reduced, thereby reducing the risk of line error failure, reducing manufacturing costs, improving assembly efficiency, and having a high degree of integration.

[0102] The following describes an electric device according to an embodiment of the present invention, wherein the electric device may be a vehicle, an aircraft, an energy storage device, a computer, or the like.

[0103] An electric device according to an embodiment of the present invention includes the above-mentioned battery pack.

[0104] According to the electrical equipment of the embodiment of the present invention, by setting the above-mentioned battery pack, the battery pack includes the above-mentioned BDU module 100, and the first low-voltage terminal 21 and the second low-voltage terminal 22 are set on the voltage-dividing relay core 2, and the third low-voltage terminal 31 and the fourth low-voltage terminal 32 are set on the N-line relay core 3, and the voltage-dividing relay low-voltage power supply circuit and the N-line relay low-voltage power supply circuit are set on the PCB electrical board 4. The first low-voltage terminal 21 and the second low-voltage terminal 22 are connected to the PCB electrical board 4 and connected to the voltage-dividing relay low-voltage power supply circuit, and the third low-voltage terminal 31 and the fourth low-voltage terminal 32 are connected to the PCB electrical board 4 and connected to the N-line relay low-voltage power supply circuit. The low-voltage wiring harness and connectors between the voltage-dividing relay core 2 and the voltage-dividing relay low-voltage power supply circuit and between the N-line relay core 3 and the N-line relay low-voltage power supply circuit can be reduced, thereby reducing the risk of line errors and failures, reducing manufacturing costs, improving assembly efficiency, and having a high degree of integration.

[0105] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0106] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A BDU module, characterized in that: include: A voltage-sharing relay core (2), wherein the voltage-sharing relay core (2) has a first low-voltage terminal (21) and a second low-voltage terminal (22); An N-line relay core (3), the N-line relay core (3) being connected to the voltage-sharing relay core (2), the N-line relay core (3) having a third low-voltage terminal (31) and a fourth low-voltage terminal (32); A PCB electrical board (4), wherein the PCB electrical board (4) has a voltage-sharing relay low-voltage power supply circuit and an N-line relay low-voltage power supply circuit, the first low-voltage terminal (21) and the second low-voltage terminal (22) are connected to the PCB electrical board (4) and are connected to the voltage-sharing relay low-voltage power supply circuit, and the third low-voltage terminal (31) and the fourth low-voltage terminal (32) are connected to the PCB electrical board (4) and are connected to the N-line relay low-voltage power supply circuit.

2. The BDU module according to claim 1, characterized in that: At least one of the first low-voltage terminal (21), the second low-voltage terminal (22), the third low-voltage terminal (31) and the fourth low-voltage terminal (32) is inserted on the PCB electrical board (4).

3. The BDU module according to claim 1, characterized in that: Also includes: A first connecting copper bar (71), wherein two ends of the first connecting copper bar (71) are respectively connected to the N-line relay core (3) and the voltage-sharing relay core (2) via fasteners (8).

4. The BDU module according to claim 1, characterized in that: Also includes: A fourth connecting copper bar (74), wherein the fourth connecting copper bar (74) is connected to the N-line relay core (3) via a fastener (8).

5. The BDU module according to claim 1, characterized in that: The N-line relay core (3) has a first auxiliary contact terminal (33) and a second auxiliary contact terminal (34); the PCB electrical board (4) has an auxiliary contact loop; the first auxiliary contact terminal (33) and the second auxiliary contact terminal (34) are connected to the PCB electrical board (4) and to the auxiliary contact loop.

6. The BDU module according to claim 5, characterized in that: At least one of the first auxiliary contact terminal (33) and the second auxiliary contact terminal (34) is inserted into the PCB electrical board (4).

7. The BDU module according to claim 1, characterized in that: The PCB electrical board (4) has a high-voltage sampling circuit, and the BDU module (100) further comprises: A safety device (5), the safety device (5) being connected to the voltage-sharing relay core (2); A high-voltage sampling copper busbar (6), wherein the high-voltage sampling component is connected to the safety device (5) and the PCB electrical board (4) and is connected to the high-voltage sampling loop.

8. The BDU module according to claim 7, characterized in that: The high-voltage sampling copper busbar (6) has a plug-in portion (61), and the plug-in portion (61) is plugged into the PCB electrical board (4).

9. The BDU module according to claim 7, characterized in that: Also includes: A second connecting copper bar (72), two ends of which are respectively connected to the safety device (5) and the voltage-sharing relay core (2) via fasteners (8).

10. The BDU module according to claim 7, characterized in that: Also includes: A third connecting copper bar (73), wherein the third connecting copper bar (73) is connected to the high-voltage sampling copper bar (6), and the third connecting copper bar (73) and the high-voltage sampling copper bar (6) are connected to the safety device (5) via a fastener (8).

11. The BDU module according to claim 7, characterized in that: Also includes: A housing (1), wherein the housing (1) has an installation cavity, one side of the installation cavity is open to form an opening (11), the PCB electrical board (4) is arranged at the opening (11) for blocking the opening (11), and the voltage-dividing relay core (2), the N-line relay core (3), the safety device (5) and the high-voltage sampling copper bus (6) are fixedly arranged in the installation cavity.

12. The BDU module according to claim 11, characterized in that: The opening (11) is located on one side of the shell (1) in the thickness direction, and the N-line relay core (3), the voltage-dividing relay core (2), the safety device (5) and the high-voltage sampling copper bus (6) are arranged in sequence along the length direction of the installation cavity.

13. The BDU module according to claim 11, characterized in that: The housing (1) has a glue potting structure inside, and the glue potting structure is used to fix the N-line relay core (3) and the voltage divider relay core (2); And / or, the safety device (5) and the high-voltage sampling copper bus (6) are fixed in the installation cavity via a fastener (8).

14. The BDU module according to claim 11, characterized in that: The housing (1) is provided with an avoidance hole (12), and the avoidance hole (12) is arranged relative to a fastener (8) connecting the voltage-sharing relay core (2), the N-line relay core (3), the safety device (5) and the high-voltage sampling copper busbar (6).

15. The BDU module according to claim 14, characterized in that: Also includes: A sealing plug (9) is provided at each of the avoidance holes (12) and is used to seal the avoidance holes (12).

16. A method for assembling a BDU module, characterized in that: The BDU module (100) is a BDU module (100) according to any one of claims 1 to 15, the BDU module (100) further comprising a housing (1), the housing (1) having an installation cavity, one side of the installation cavity being open to form an opening (11), and the assembly method comprising: Placing the voltage-sharing relay core (2) and the N-line relay core (3) in the installation cavity; Injecting fixing glue into the installation cavity to fix the voltage-sharing relay core (2) and the N-line relay core (3); The PCB electrical board (4) is arranged at the opening (11), and the connection terminals on the voltage-dividing relay core (2) and the N-line relay core (3) are clamped into the jacks (41) on the PCB electrical board (4); The connecting terminal and the PCB electrical board (4) are connected by welding.

17. A battery pack, characterized in that: It comprises a BDU module (100) according to any one of claims 1-15.

18. An electrical equipment, characterized in that: Comprising a battery pack according to claim 17.

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