Power distribution device, battery pack and vehicle

Abstract

Disclosed is a power distribution device, a battery pack, and a vehicle, the power distribution device (1) including a base (100), a high voltage circuit (200), a circuit board (300), a low voltage circuit (400), and a plurality of high and low voltage connection tabs (500), a high voltage connection portion (110) and a low voltage connection portion (120) are fixed to the base, the high voltage circuit is at least partially assembled to the base and electrically communicates with the high voltage connection portion, includes a main cutoff switch core (230) having a module positive connection terminal (210) and a module negative connection terminal (220) and fixed by the base, the circuit board is attached to the base, the low voltage circuit is integrated on the circuit board and electrically communicates with the low voltage connection portion, and each of the high and low voltage connection tabs has one end connected to and electrically communicates with the high voltage circuit and the other end inserted into the circuit board and electrically communicates with the low voltage circuit. The power distribution device has the advantages of simple structure and compactness, high space utilization, small volume, light weight and low cost.

Description

[Technical Field]

[0001] This application claims priority to a Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on December 20, 2021, bearing application number 202123233795.5 and titled "Power Battery System Distribution Box," and a Chinese patent application filed with the State Intellectual Property Office of the People's Republic of China on February 25, 2022, bearing application number 202210182099.6 and titled "Power Distribution Device, Battery Pack and Vehicle," the entire contents of which are incorporated herein by reference.

[0002] The present disclosure relates to the technical field of vehicles, and more particularly to power distribution devices, battery packs, and vehicles. [Background technology]

[0003] The distribution box in the related art usually includes a high-voltage circuit, a low-voltage circuit, a high-voltage connector, and a low-voltage connector, and has many connecting copper bars or harness wiring between components in the distribution box, which results in a messy layout, a large occupied space, low space utilization, high costs, heavy weight, large volume, and low production efficiency. Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure seeks to solve at least one of the technical problems in the prior art by providing a power distribution device that has advantages such as a simple and compact structure, high space utilization, small volume, light weight, and low cost.

[0005] The present disclosure further provides a battery pack having the above power distribution device.

[0006] The present disclosure further provides a vehicle having the above battery pack. [Means for solving the problem]

[0007] The power distribution device according to the first embodiment of the present disclosure includes a base, a high-voltage circuit, a circuit board, a low-voltage circuit, and a plurality of contact a high-voltage connection portion and a low-voltage connection portion fixed to the base; the high-voltage circuit is at least partially assembled to the base, electrically communicating with the high-voltage connection portion, and includes a main cutoff switch core having a module positive connection terminal and a module negative connection terminal and fixed by the base; the circuit board is attached to the base; the low-voltage circuit is integrated on the circuit board and electrically communicating with the low-voltage connection portion; contact The connecting tab has a first end connected to the high voltage circuit and electrically communicating therewith, and a second end inserted into the circuit board and electrically communicating with the low voltage circuit.

[0008] In some embodiments of the present disclosure, the plurality of contact The connecting tabs are parallel to each other and perpendicular to the circuit board.

[0009] In some embodiments of the present disclosure, the high-voltage circuit is overlap-connected to the high-voltage connection portion and electrically communicates therewith, the low-voltage connection portion is inserted into the circuit board and electrically communicates with the low-voltage circuit, and the connected components in the high-voltage circuit are electrically communicated by the overlap connection.

[0010] In some embodiments of the present disclosure, the high-voltage circuit further includes a circuit protection device, the circuit protection device is assembled to the base, a first terminal of the circuit protection device forms the module positive connection terminal, there are a plurality of main shutoff switch cores, the plurality of main shutoff switch cores include at least a main positive shutoff switch core and a main negative shutoff switch core, a second terminal of the circuit protection device is electrically connected to a first terminal of the main positive shutoff switch core, and the second terminal of the main positive shutoff switch core and the first terminal of the main negative shutoff switch core are respectively electrically connected to the high-voltage connection portion, and the plurality of contactThe connection tabs include a main positive low voltage positive electrode connection tab, a main positive low voltage negative electrode connection tab, a main negative low voltage positive electrode connection tab, and a main negative low voltage negative electrode connection tab, a first end of the main positive low voltage positive electrode connection tab and a first end of the main positive low voltage negative electrode connection tab are respectively connected to the main positive shutoff switch core, a second end of the main positive low voltage positive electrode connection tab and a second end of the main positive low voltage negative electrode connection tab are respectively inserted into the circuit board and electrically communicate with the low voltage circuit, a first end of the main negative low voltage positive electrode connection tab and a first end of the main negative low voltage negative electrode connection tab are respectively connected to the main negative shutoff switch core, and a second end of the main negative low voltage positive electrode connection tab and a second end of the main negative low voltage negative electrode connection tab are respectively inserted into the circuit board and electrically communicate with the low voltage circuit.

[0011] In some embodiments of the present disclosure, the second terminal of the circuit protection device is overlap-connected to the first terminal of the main positive cutoff switch core and is in electrical communication therewith, and the second terminal of the main positive cutoff switch core and the first terminal of the main negative cutoff switch core are overlap-connected to the high-voltage connection portion and are in electrical communication therewith, respectively.

[0012] In some embodiments of the present disclosure, the plurality of contact The connection tabs further include a positive voltage collecting tab and a negative voltage collecting tab, a first end of the positive voltage collecting tab being lap-connected to a lap-connection point between the second terminal of the main positive cutoff switch core and the high-voltage connection portion, a second end of the positive voltage collecting tab being inserted into the circuit board and electrically communicating with the low-voltage circuit, a first end of the negative voltage collecting tab being lap-connected to a lap-connection point between the first terminal of the main negative cutoff switch core and the high-voltage connection portion, and a second end of the negative voltage collecting tab being inserted into the circuit board and electrically communicating with the low-voltage circuit.

[0013] In some embodiments of the present disclosure, the high-voltage connection portion further includes a high-voltage positive electrode lead-out tab and a high-voltage negative electrode lead-out tab, the high-voltage positive electrode lead-out tab being overlap-connected to the second terminal of the main positive cutoff switch core and the end of the positive electrode voltage collecting tab, respectively, and being in electrical communication therewith, and the high-voltage negative electrode lead-out tab being overlap-connected to the first terminal of the main negative cutoff switch core and the end of the negative electrode voltage collecting tab, respectively, and being in electrical communication therewith.

[0014] In some embodiments of the present disclosure, the second terminal of the main positive cutoff switch core, the ends of the high-voltage positive electrode pull-out tab and the positive electrode voltage collecting tab are overlapped and connected in order, a positive electrode rotation prevention positioning groove is provided in one of the high-voltage positive electrode pull-out tab and the positive electrode voltage collecting tab, and the other of the high-voltage positive electrode pull-out tab and the positive electrode voltage collecting tab is fitted into the positive electrode rotation prevention positioning groove, and the first terminal of the main negative cutoff switch core, the ends of the high-voltage negative electrode pull-out tab and the negative electrode voltage collecting tab are overlapped and connected in order, a negative electrode rotation prevention positioning groove is provided in one of the high-voltage negative electrode pull-out tab and the negative electrode voltage collecting tab, and the other of the high-voltage negative electrode pull-out tab and the negative electrode voltage collecting tab is fitted into the negative electrode rotation prevention positioning groove.

[0015] In some embodiments of the present disclosure, the base is configured to have a first positioning partition rib and a second positioning partition rib, the first positioning partition rib being located between the circuit protection device and the high-voltage positive electrode pull-out tab and between the circuit protection device and the positive electrode voltage collecting tab, and the second positioning partition rib being located between the high-voltage positive electrode pull-out tab and the high-voltage negative electrode pull-out tab and between the positive electrode voltage collecting tab and the negative electrode voltage collecting tab.

[0016] In some embodiments of the present disclosure, the high-voltage circuit further includes a current sensor, a first terminal of the current sensor forms the module negative electrode connecting terminal, a second terminal of the current sensor is electrically connected to a second terminal of the main negative cutoff switch core, and contactThe connection tab further includes a current collecting pin, a first end of the current collecting pin connected to the current sensor, and a second end of the current collecting pin inserted into the circuit board and electrically communicating with the low-voltage circuit.

[0017] In some embodiments of the present disclosure, the second terminal of the current sensor is overlap-connected to and in electrical communication with the second terminal of the main negative cutoff switch core.

[0018] In some embodiments of the present disclosure, the base is configured to have a third positioning partition rib, the third positioning partition rib being located between the current sensor and the high voltage connection.

[0019] In some embodiments of the present disclosure, the circuit protection device, the main positive cutoff switch core, the main negative cutoff switch core, and the current sensor are arranged in sequence along the length direction of the base, and the low-voltage connection portion and the current sensor are arranged along the width direction of the base.

[0020] In some embodiments of the present disclosure, the high-voltage circuit further includes a pre-charge circuit, a portion of which is integrated on the circuit board, the pre-charge circuit including a pre-charge resistor and a pre-charge cut-off switch, the pre-charge resistor and the pre-charge cut-off switch being assembled on the base and inserted into the circuit board, the pre-charge resistor and the pre-charge cut-off switch being connected in series with each other and in parallel to the main cut-off switch core, contact The connection tabs further include a pre-charged low-voltage positive electrode connection tab and a pre-charged low-voltage negative electrode connection tab, a first end of the pre-charged low-voltage positive electrode connection tab and a first end of the pre-charged low-voltage negative electrode connection tab being connected to the pre-charge cutoff switch, and a second end of the pre-charged low-voltage positive electrode connection tab and a second end of the pre-charged low-voltage negative electrode connection tab being inserted into the circuit board and electrically communicating with the low-voltage circuit.

[0021] In some embodiments of the present disclosure, the pre-charge cutoff switch has a pre-charge high-voltage positive connection tab and a pre-charge high-voltage negative connection tab, the pre-charge resistor has a resistor high-voltage connection tab, the pre-charge cutoff switch and the pre-charge resistor are in electrical communication by contact, and the pre-charge high-voltage positive connection tab, the pre-charge high-voltage negative connection tab, and the resistor high-voltage connection tab are inserted into the circuit board and electrically communicate with a portion of the pre-charge circuit integrated on the circuit board. Preferably, the pre-charge cutoff switch has the pre-charge high-voltage positive connection tab and the pre-charge high-voltage negative connection tab, the pre-charge resistor has a resistor high-voltage positive connection tab and a resistor high-voltage negative connection tab, and the pre-charge high-voltage positive connection tab, the pre-charge high-voltage negative connection tab, the resistor high-voltage positive connection tab, and the resistor high-voltage negative connection tab are inserted into the circuit board and electrically communicate with a portion of the pre-charge circuit integrated on the circuit board.

[0022] In some embodiments of the present disclosure, the precharge circuit further includes a precharge connection tab, the second terminal of the circuit protection device is overlap-connected to the first terminal of the main positive shutoff switch core and is in electrical communication therewith, a first end of the precharge connection tab is overlap-connected to a point where the second terminal of the circuit protection device and the first terminal of the main positive shutoff switch core are overlap-connected, and a second end of the precharge connection tab is inserted into the circuit board and is in electrical communication with a portion of the precharge circuit integrated on the circuit board.

[0023] In some embodiments of the present disclosure, the precharge connection tab is integrally molded with the second terminal of the circuit protection device.

[0024] In some embodiments of the present disclosure, the pre-charge cutoff switch, the pre-charge resistor, the main positive cutoff switch core, the main negative cutoff switch core, and the low-voltage connection part are arranged in order along the length direction of the base, and the pre-charge cutoff switch, the pre-charge resistor, and the circuit protection device are arranged along the width direction of the base.

[0025] In some embodiments of the present disclosure, the base is configured to have a main positive cutoff switch core mounting groove, a main negative cutoff switch core mounting groove, a pre-charge cutoff switch mounting groove, and a pre-charge resistor mounting groove, wherein the main positive cutoff switch core is fixed to the main positive cutoff switch core mounting groove by a thermally conductive sealant, the main negative cutoff switch core is fixed to the main negative cutoff switch core mounting groove by a thermally conductive sealant, the pre-charge cutoff switch is engaged with the pre-charge cutoff switch mounting groove or is fixed to the pre-charge cutoff switch mounting groove by a thermally conductive sealant, and the pre-charge resistor is engaged with the pre-charge resistor mounting groove.

[0026] In some embodiments of the present disclosure, the base includes a base body and a panel, the at least a portion of the high-voltage circuit is assembled to the base body, the circuit board is attached to the base body, the panel is connected to the base body, and the high-voltage connection and the low-voltage connection are fixed to the panel.

[0027] In some embodiments of the present disclosure, the base body and the panel are one piece or separate pieces.

[0028] A battery pack according to an embodiment of the second aspect of the present disclosure includes a case, a power distribution device according to an embodiment of the first aspect of the present disclosure, and a battery module, wherein the power distribution device is installed within the case, the high-voltage connection portion and the low-voltage connection portion are exposed from the case, and the battery module is installed within the case and is electrically connected to the module positive electrode connection terminal and the module negative electrode connection terminal, respectively.

[0029] A vehicle according to an embodiment of the third aspect of the present disclosure includes the battery pack according to the embodiment of the second aspect of the present disclosure. [Effects of the Invention]

[0030] Additional aspects and advantages of the disclosure will be set forth in part in the description that follows, and in part will be obvious from the description, or may be learned by practice of the disclosure. [Brief explanation of the drawings]

[0031] The above and / or additional aspects and advantages of the present disclosure will become apparent and readily understood by reading the following detailed description of the embodiments with reference to the drawings, in which:

[0032] [Figure 1] 1 is a schematic configuration diagram of a power distribution device according to an embodiment of the present disclosure. [Figure 2] FIG. 10 is a schematic configuration diagram of a power distribution device according to an embodiment of the present disclosure, viewed from another perspective. [Figure 3] FIG. 10 is a schematic configuration diagram of a power distribution device according to another embodiment of the present disclosure. [Figure 4] FIG. 1 is an exploded view of a power distribution device according to an embodiment of the present disclosure. [Figure 5] 1 is a schematic configuration diagram of a base of a power distribution device according to an embodiment of the present disclosure. [Figure 6] FIG. 10 is a schematic configuration diagram of a base of a power distribution device according to an embodiment of the present disclosure, viewed from another perspective. [Figure 7] 1 is a schematic circuit diagram of a power distribution device according to an embodiment of the present disclosure. [Figure 8] FIG. 10 is a schematic configuration diagram of a power distribution device according to another embodiment of the present disclosure. [Figure 9] 1 is a schematic configuration diagram of a vehicle according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0033] Hereinafter, the embodiments of the present disclosure will be described in detail, and examples of the embodiments are shown in the drawings, where the same or similar reference numerals throughout represent the same or similar parts or parts having the same or similar functions. The embodiments described below with reference to the drawings are merely illustrative and are intended to help interpret the present disclosure, and should not be understood as limiting the present disclosure.

[0034] In the description of the present disclosure, the orientations or positional relationships indicated by terms such as “center,” “longitudinal direction,” “lateral direction,” “length,” “width,” “thickness,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial direction,” “radial direction,” and “circumferential direction” are orientations or positional relationships shown based on the drawings, and are intended merely to facilitate and simplify the description of the present disclosure, and do not indicate or suggest that the depicted devices or parts must have a specific orientation, be configured, or be operated in a specific orientation, and therefore should not be understood as limiting the present disclosure.

[0035] In the description of this disclosure, "plurality" means two or more, and "several" means one or more.

[0036] Hereinafter, a battery pack 2 according to an embodiment of the present disclosure will be described with reference to the drawings. The battery pack 2 includes a case 800, a battery module 700, and a power distribution device 1.

[0037] Hereinafter, a power distribution device 1 according to an embodiment of the present disclosure will be described with reference to the drawings.

[0038] As shown in FIGS. 1 to 8, a power distribution device 1 according to an embodiment of the present disclosure includes a base 100, a high-voltage circuit 200, a circuit board 300, a low-voltage circuit 400, and a plurality of contact Includes connecting tab 500.

[0039] A high-voltage connection part 110 and a low-voltage connection part 120 are fixed to the base 100. A high-voltage circuit 200 is at least partially assembled to the base 100, electrically connected to the high-voltage connection part 110, has a module positive connection terminal 210 and a module negative connection terminal 220, and includes a main cutoff switch core 230 fixed by the base 100. A circuit board 300 is attached to the base 100. A low-voltage circuit 400 is integrated on the circuit board 300 and electrically connected to the low-voltage connection part 120. contactThe connecting tab 500 has a first end connected to the high voltage circuit 200 and electrically connected thereto, and a second end inserted into the circuit board 300 and electrically connected to the low voltage circuit 400 .

[0040] Regarding the term "main shutoff switch core 230," the main shutoff switch may include, but is not limited to, one or more of a relay, an IGBT (Insulated Gate Bipolar Transistor), and a MOS transistor (Metal-Oxide-Semiconductor Field-Effect Transistor, MOSFET). The "core" refers to the part of the main shutoff switch that mainly performs its function, and can be understood to be the internal functional components excluding the housing of the main shutoff switch itself. In other words, the main shutoff switch core 230 is the remaining part of the main shutoff switch excluding the housing of the main shutoff switch itself. A battery management controller (BMC) may also be integrated on the circuit board 300.

[0041] In the battery pack 2 according to the embodiment of the present disclosure, the power distribution device 1 is installed in a case, the high-voltage connection part 110 and the low-voltage connection part 120 are exposed from the case, and the battery module 700 is installed in the case and electrically connected to the module positive electrode connection terminal 210 and the module negative electrode connection terminal 220, respectively. The high-voltage connection part 110 and the low-voltage connection part 120 are exposed from the case so as to be connected to electrical equipment of the vehicle (e.g., a motor, an air conditioner compressor, a PTC (Positive Temperature Coefficient), a controller, etc.).

[0042] For example, instead of the high-voltage circuit 200 and the low-voltage circuit 400 being directly connected, a transformer structure (i.e., a structure capable of changing voltage) is connected between the high-voltage circuit 200 and the low-voltage circuit 400, for example, a transformer is connected between the high-voltage circuit 200 and the low-voltage circuit 400. The installation of the transformer structure can ensure that the voltage of the current in the low-voltage circuit 400 is lower than the voltage of the current in the high-voltage circuit 200, and the battery module 700 can supply power to the low-voltage circuit 400 via the high-voltage circuit 200 and the transformer structure, ensuring normal operation of the low-voltage circuit 400.

[0043] In the power distribution device 1 according to the embodiment of the present disclosure, the high-voltage connection portion 110 and the low-voltage connection portion 120 are fixed to the base 100, and the high-voltage connection portion 110 and the low-voltage connection portion 120 can be exposed from the case. Therefore, the high-voltage connection portion 110 can supply power to high-voltage electrical equipment in a vehicle. The low-voltage connection portion 120 may include communication pins for communicating with a vehicle controller to realize real-time control of the power distribution device 1. The low-voltage connection portion 120 may further include a low-voltage plug for supplying power to low-voltage electrical equipment in the vehicle. The base 100 fixes the relative positions of both the high-voltage connection portion 110 and the low-voltage connection portion 120 to the base 100, thereby preventing contact between the high-voltage connection portion 110 and the low-voltage connection portion 120 and ensuring the safety of the electrical connection of the power distribution device 1. The high-voltage connection portion 110, the low-voltage connection portion 120, and the base 100 can be designed separately to improve connection flexibility. The battery module 700 can supply power to the high voltage circuit 200 via the module positive electrode connection terminal 210 and the module negative electrode connection terminal 220, and the high voltage circuit 200 can supply power to high voltage electrical equipment of the vehicle via the high voltage connection part 110.

[0044] Furthermore, by directly fixing the main shutoff switch core 230 using the base 100, space can be saved and the main shutoff switch core 230 can have a sufficiently long pull-out portion, and the main shutoff switch core 230 is directly used and fixed and protected using the base 100, thus eliminating the original case of the conventional shutoff switch and making the structure simpler and more compact.

[0045] The low-voltage circuit 400 is integrated on the circuit board 300, the circuit board 300 is attached to the base 100, and the main cutoff switch core 230 can have a sufficiently long lead-out portion, which creates a prerequisite for omitting a large amount of copper bars and harnesses inside the power distribution device 1. Based on this, contact The connecting tab 500 is contact The first end of the connecting tab 500 is connected to the high voltage circuit 200 and electrically communicates therewith, and the second end is inserted into the circuit board 300 and is installed to electrically communicate with the low voltage circuit 400 .

[0046] In other words, each contact The first end of the connecting tab 500 is connected to the high voltage circuit 200, and each contact The second end of the connecting tab 500 may be directly inserted into the circuit board 300, thereby realizing communication between the high-voltage circuit 200 and the low-voltage circuit 400, and allowing the low-voltage circuit 400 on the circuit board 300 to control the on / off of the main cutoff switch core 230, thereby eliminating the need for intermediate connecting members (e.g., copper bars, harnesses, etc.) for conventional high- and low-voltage connections.

[0047] As can be seen from the above, the electrical connection between the high-voltage circuit 200 and the low-voltage circuit 400 is more reliable, the layout is clear, and problems such as excessive temperature rise and sintering of the connection points are less likely to occur. By eliminating the large number of copper bars and harnesses in the conventional power distribution device 1, the layout of the electrical connections in the power distribution device 1 can be further simplified, and the structure is simple and compact, thereby further reducing the volume of the power distribution device 1, improving the space utilization rate of the power distribution device 1, reducing the weight and cost of the power distribution device 1, further saving space in the battery pack 2, improving the energy density of the battery pack 2, and improving the driving range of the completed vehicle.

[0048] As described above, the power distribution device 1 according to the embodiment of the present disclosure has advantages such as a simple and compact structure, high space utilization rate, small volume, light weight, and low cost.

[0049] The battery pack 2 according to the embodiment of the present disclosure has advantages such as a simple and compact structure, high space utilization, small volume, light weight, and low cost by utilizing the power distribution device 1 according to the above embodiment of the present disclosure.

[0050] In some specific embodiments of the present disclosure, as shown in FIGS. contact The connecting tabs 500 are parallel to each other and perpendicular to the circuit board 300. The area where the high voltage circuit 200 is arranged is approximately parallel to the circuit board 300, and each contact By installing the connecting tab 500 perpendicular to the circuit board 300, the high voltage circuit 200 and the circuit board 300 contact The size of the Connect Tab 500 has been reduced, contact The volume of the connecting tab 500 can be reduced while multiple contact Interference between the connecting tabs 500 can be avoided, the difficulty of circuit connection can be reduced, and the layout can be further simplified.

[0051] In some specific embodiments of the present disclosure, as shown in Figures 2 to 4, the high-voltage circuit 200 is overlap-connected to the high-voltage connection portion 110 and electrically communicates therewith, and the main shutoff switch core 230 can have a sufficiently long lead-out portion, so that the high-voltage circuit 200 and the high-voltage connection portion 110 are partially overlapped to achieve an overlap connection therebetween, and electrical communication is achieved through such an overlap connection, so that the conventional intermediate connection members between the high-voltage circuit and the high-voltage connection portion, i.e., the copper bar and harness of the high-voltage portion, can be omitted.

[0052] Furthermore, the low-voltage connector 120 is inserted into the circuit board 300 and electrically communicates with the low-voltage circuit 400, i.e., the low-voltage circuit 400 and the low-voltage connector 120 can be electrically connected by the circuit board 300, thus eliminating the need for intermediate connectors between the low-voltage circuit and the low-voltage connector, i.e., the copper bar and harness in the low-voltage section, of the conventional circuit. The components to be connected in the high-voltage circuit 200 are electrically connected by an overlapping connection, i.e., the components that need to be connected in the high-voltage circuit 200 are partially overlapping each other to achieve an overlapping connection, and electrical communication is achieved by such an overlapping connection, thus eliminating the need for intermediate connectors in the high-voltage circuit, i.e., the copper bar and harness in the high-voltage section, of the conventional circuit.

[0053] As a result, the electrical connections between the high-voltage circuit 200 and the high-voltage connection part 110, between the connected parts in the high-voltage circuit 200 itself, and between the low-voltage circuit 400 and the low-voltage connection part 120 are more reliable, the layout is clear, and problems such as excessive temperature rise and sintering of the connection points are less likely to occur.By eliminating the large number of copper bars and harnesses in the conventional distribution device, the layout of the electrical connections in the distribution device 1 can be further simplified, thereby further reducing the volume of the distribution device 1, improving the space utilization rate of the distribution device 1, reducing the weight and cost of the distribution device 1, further saving space in the battery pack 2, improving the energy density of the battery pack 2, and improving the driving range of the completed vehicle.

[0054] 1 , 2 , and 4 , the high-voltage circuit 200 further includes a circuit protection device 240, which is assembled to the base 100 and has a first terminal forming the module positive electrode connection terminal 210. The circuit protection device 240 may include, but is not limited to, one or more types of circuit protection devices, such as a fuse, a breaker, a fuse box, and an active fuse. By installing the circuit protection device 240, when a situation such as excessive current or excessive voltage occurs in the high-voltage circuit 200, the circuit protection device 240 can automatically disconnect in a timely manner to shut down the high-voltage circuit 200 and protect other components in the high-voltage circuit 200.

[0055] There are multiple main shutdown switch cores 230, including at least a main positive shutdown switch core 231 and a main negative shutdown switch core 232, and the second terminal of the circuit protection device 240 is electrically connected to the first terminal of the main positive shutdown switch core 231, and the second terminal of the main positive shutdown switch core 231 and the first terminal of the main negative shutdown switch core 232 are each electrically connected to the high-voltage connection part 110.

[0056] The main positive cutoff switch core 231 may include, but is not limited to, one or more of a relay core (i.e., a relay does not need to be provided with a case), an IGBT core (i.e., an IGBT does not need to be provided with a case), and a MOS transistor core (i.e., a MOS transistor does not need to be provided with a case). The main negative cutoff switch core 232 may include, but is not limited to, one or more of a relay core (i.e., a relay does not need to be provided with a case), an IGBT core (i.e., an IGBT does not need to be provided with a case), and a MOS transistor core (i.e., a MOS transistor does not need to be provided with a case).

[0057] The circuit board 300 can control the on / off of the main positive cutoff switch core 231 and the on / off of the main negative cutoff switch core 232 by integrating the low-voltage circuit 400 thereon.

[0058] For example, the main positive cutoff switch core 231 can control whether the high voltage connection part 110 and the module positive electrode connection terminal 210 are in communication with each other, and the main negative cutoff switch core 232 can control whether the high voltage connection part 110 and the module negative electrode connection terminal 220 are in communication with each other. Main / Negative Cutoff Switch Core 232 are both kept on, electrical continuity of the high-voltage circuit 200 can be achieved, and at this time, the battery module 700 can supply power to the high-voltage electrical equipment of the vehicle via the high-voltage connection part 110. Because the voltage of the current in the high-voltage circuit 200 is high, two switches, the main positive cutoff switch core 231 and the main negative cutoff switch core 232, are installed, and the on / off of the main positive cutoff switch core 231 and the main negative cutoff switch core 232 is prevented from interfering with each other, thereby very reliably cutting off the high-voltage circuit 200 and improving the safety of the high-voltage circuit 200, thereby ensuring the safety of power supply to the high-voltage electrical equipment of the vehicle.

[0059] Also, multiple contact The connection tabs 500 include a main positive low voltage positive electrode connection tab 510, a main positive low voltage negative electrode connection tab 520, a main negative low voltage positive electrode connection tab 530, and a main negative low voltage negative electrode connection tab 540. A first end of the main positive low voltage positive electrode connection tab 510 and a first end of the main positive low voltage negative electrode connection tab 520 are respectively connected to the main positive cutoff switch core 231. A second end of the main positive low voltage positive electrode connection tab 510 and a second end of the main positive low voltage negative electrode connection tab 520 are respectively connected to the main positive cutoff switch core 231. , are inserted into the circuit board 300 and electrically connected to the low-voltage circuit 400, a first end of the main negative low-voltage positive electrode connection tab 530 and a first end of the main negative low-voltage negative electrode connection tab 540 are respectively connected to the main negative cutoff switch core 232, and a second end of the main negative low-voltage positive electrode connection tab 530 and a second end of the main negative low-voltage negative electrode connection tab 540 are respectively inserted into the circuit board 300 and electrically connected to the low-voltage circuit 400.

[0060] In this way, the main positive cutoff switch core 231 achieves electrical communication with the low voltage circuit 400 in the circuit board 300 via the main positive low voltage positive electrode connection tab 510 and the main positive low voltage negative electrode connection tab 520, and the main negative cutoff switch core 232 achieves electrical communication with the low voltage circuit 400 in the circuit board 300 via the main negative low voltage positive electrode connection tab 530 and the main negative low voltage negative electrode connection tab 540. In this way, the low voltage circuit 400 in the circuit board 300 can be used to control the on / off of the main positive cutoff switch core 231 and the on / off of the main negative cutoff switch core 232.

[0061] Furthermore, the main positive shutoff switch core 231 is directly connected to the circuit board 300 in an insertion manner via the main positive low voltage positive electrode connection tab 510 and the main positive low voltage negative electrode connection tab 520, thereby eliminating the need for a conductive structure (e.g., a conductive copper bar or conductor wire) between the main positive shutoff switch core 231 and the circuit board 300 and ensuring a reliable electrical connection between the main positive shutoff switch core 231 and the circuit board 300, which is advantageous to reducing the volume, cost, and weight of the power distribution device 1. Furthermore, the main negative shutoff switch core 232 is directly connected to the circuit board 300 in an insertion manner via the main negative low voltage positive electrode connection tab 530 and the main negative low voltage negative electrode connection tab 540, thereby eliminating the need for a conductive structure (e.g., a conductive copper bar or conductor wire) between the main negative shutoff switch core 232 and the circuit board 300 and ensuring a reliable electrical connection between the main negative shutoff switch core 232 and the circuit board 300, which is advantageous to reducing the volume, cost, and weight of the power distribution device 1.

[0062] Preferably, as shown in Figures 1, 2 and 4, the second terminal of the circuit protection device 240 is overlap-connected to the first terminal of the main positive shutdown switch core 231 and is in electrical communication therewith, and the second terminal of the main positive shutdown switch core 231 and the first terminal of the main negative shutdown switch core 232 are overlap-connected to the high-voltage connection part 110 and are in electrical communication therewith.

[0063] In this way, there is no need to install a conductive structure (e.g., a conductive copper bar) between the circuit protection device 240 and the main shutoff switch core 230, which results in a higher space utilization rate for the power distribution device 1, a smaller volume, lighter weight, and lower cost, which is advantageous for improving the reliability of the electrical connection between the circuit protection device 240 and the main shutoff switch core 230, and is less likely to cause problems such as excessive temperature rise or sintering of the connection points. Furthermore, there is no need to install a conductive structure (e.g., a conductive copper bar or conductor) between both the main positive shutoff switch core 231 and the main negative shutoff switch core 232 and the high-voltage connection part 110, which simplifies the electrical connection structure between the main positive shutoff switch core 231 and the main negative shutoff switch core 232, resulting in a more reliable electrical connection, a simpler layout, and less likely to cause problems such as excessive temperature rise or sintering of the connection points.

[0064] Furthermore, as shown in Figs. 1, 2 and 4, contact The connection tab 500 further includes a positive voltage collecting tab 550 and a negative voltage collecting tab 560. A first end of the positive voltage collecting tab 550 is lap-connected to the lap-connected portion between the second terminal of the main positive cutoff switch core 231 and the high-voltage connecting portion 110, and a second end of the positive voltage collecting tab 550 is inserted into the circuit board 300 to electrically communicate with the low-voltage circuit 400. A first end of the negative voltage collecting tab 560 is lap-connected to the lap-connected portion between the first terminal of the main negative cutoff switch core 232 and the high-voltage connecting portion 110, and a second end of the negative voltage collecting tab 560 is inserted into the circuit board 300 to electrically communicate with the low-voltage circuit 400.

[0065] In this way, the circuit board 300 collects the voltage of the high-voltage circuit 200 through the positive voltage collecting tab 550 and the negative voltage collecting tab 560, and can further monitor the voltage of the high-voltage circuit 200 and whether or not sintering has occurred, which is beneficial to the reliable application of the power distribution device 1 and improves the safety of the power distribution device 1.

[0066] 3 to 6, high-voltage connection portion 110 includes a high-voltage positive electrode draw tab 111 and a high-voltage negative electrode draw tab 112. High-voltage positive electrode draw tab 111 is overlap-connected to the second terminal of main positive cutoff switch core 231 and the end of positive electrode voltage collection tab 550, respectively, and is in electrical communication therewith. In this way, there is no need to install a conductive structure (e.g., a conductive copper bar or conductor) between high-voltage positive electrode draw tab 111 and main positive cutoff switch core 231, and there is no need to install a conductive structure (e.g., a conductive copper bar or conductor) between high-voltage positive electrode draw tab 111 and positive electrode voltage collection tab 550. The high-voltage negative electrode draw tab 112 is overlap-connected to the end of the first terminal of the main negative cutoff switch core 232 and the negative electrode voltage collection tab 560, respectively, and is in electrical communication with them; thus, there is no need to install a conductive structure (e.g., a conductive copper bar or conductor) between the high-voltage negative electrode draw tab 112 and the main negative cutoff switch core 232, and there is no need to install a conductive structure (e.g., a conductive copper bar or conductor) between the high-voltage negative electrode draw tab 112 and the negative electrode voltage collection tab 560.

[0067] By installing the high-voltage positive electrode pull-out tab 111 and the high-voltage negative electrode pull-out tab 112, an electrical connection can be realized between the high-voltage connection part 110 and the high-voltage circuit 200, thereby ensuring that the high-voltage connection part 110 can supply power to the high-voltage electrical equipment of the vehicle and further simplifying the layout of electrical connections within the power distribution device 1, thereby further reducing the volume of the power distribution device 1, improving the space utilization rate of the power distribution device 1, reducing the weight and cost of the power distribution device 1, further saving space for the battery pack 2, improving the energy density of the battery pack 2, and improving the cruising range of the completed vehicle.

[0068] In some embodiments of the present disclosure, the ends of the second terminal of the main positive cutoff switch core 231, the high-voltage positive electrode draw tab 111, and the positive electrode voltage collection tab 550 are overlapped and connected in order, a positive electrode rotation prevention positioning groove is provided in one of the high-voltage positive electrode draw tab 111 and the positive electrode voltage collection tab 550, and the other of the high-voltage positive electrode draw tab 111 and the positive electrode voltage collection tab 550 is fitted into the positive electrode rotation prevention positioning groove. The ends of the first terminal of the main negative cutoff switch core 232, the high-voltage negative electrode draw tab 112, and the negative electrode voltage collection tab 560 are overlapped and connected in order, a negative electrode rotation prevention positioning groove is provided in one of the high-voltage negative electrode draw tab 112 and the negative electrode voltage collection tab 560, and the other of the high-voltage negative electrode draw tab 112 and the negative electrode voltage collection tab 560 is fitted into the negative electrode rotation prevention positioning groove.

[0069] For example, in order to reduce the probability of damage to the positive electrode voltage collecting tab 550 and the negative electrode voltage collecting tab 560 and ensure the reliability of voltage collection, a positive electrode anti-rotation positioning groove may be provided on the high-voltage positive electrode pull-out tab 111, and a negative electrode anti-rotation positioning groove may be provided on the high-voltage negative electrode pull-out tab 112.

[0070] In this way, the positive and negative voltage collecting tabs 550, 560 can be prevented from moving parallel to the width of the base 100, improving the stability of the electrical connection and the accuracy of voltage collection, while also preventing the positive and negative voltage collecting tabs 550, 560 from rotating during the assembly process, particularly in embodiments where the positive and negative voltage collecting tabs 550, 560 need to be attached and fixed with screw fasteners (e.g., bolts).

[0071] Furthermore, as shown in Figures 1 to 6, the base 100 is configured to have a first positioning partition rib 130 and a second positioning partition rib 140, the first positioning partition rib 130 being located between the circuit protection device 240 and the high-voltage positive electrode pull-out tab 111 and between the circuit protection device 240 and the positive electrode voltage collecting tab 550, and the second positioning partition rib 140 being located between the high-voltage positive electrode pull-out tab 111 and the high-voltage negative electrode pull-out tab 112 and between the positive electrode voltage collecting tab 550 and the negative electrode voltage collecting tab 560.

[0072] The first positioning partition rib 130 separates the positive electrode voltage collecting tab 550 and the negative electrode voltage collecting tab 560, and prevents electrical contact caused by movement between the circuit protection device 240 and the high voltage positive electrode pull-out tab 111. connection This not only prevents electrical interference caused by movement between the circuit protection device 240 and the positive voltage collecting tab 550 but also separates the circuit protection device 240 and the positive voltage collecting tab 550. connection This can avoid the above-mentioned problems and can also provide a certain positioning effect for the circuit protection device 240, the high voltage positive electrode pull-out tab 111, and the positive electrode voltage collection tab 550.

[0073] The second positioning partition rib 140 not only separates the high-voltage positive electrode pull tab 111 and the high-voltage negative electrode pull tab 112 to prevent electrical misconnection due to movement between the high-voltage positive electrode pull tab 111 and the high-voltage negative electrode pull tab 112, but also separates the positive electrode voltage collection tab 550 and the negative electrode voltage collection tab 560 to prevent electrical misconnection due to movement between the positive electrode voltage collection tab 550 and the negative electrode voltage collection tab 560, and can also perform a certain positioning function for the high-voltage positive electrode pull tab 111, the high-voltage negative electrode pull tab 112, the positive electrode voltage collection tab 550, and the negative electrode voltage collection tab 560.

[0074] In some specific embodiments of the present disclosure, as shown in Figures 1 and 4, the high-voltage circuit 200 further includes a current sensor 150, a first terminal of the current sensor 150 forms the module negative electrode connecting terminal 220, and a second terminal of the current sensor 150 electrically communicates with a second terminal of the main negative cutoff switch core 232. contactThe connecting tab 500 further includes a current collecting pin 570, a first end of which is connected to the current sensor 150, and a second end of which is inserted into the circuit board 300 to electrically communicate with the low-voltage circuit 400. In this way, a copper bar or harness between the current collecting pin 570 and the circuit board 300 and the low-voltage circuit 400 can be omitted, and electrical connection between the current collecting pin 570 and the circuit board 300 and the low-voltage circuit 400 can be realized, which not only saves space within the power distribution device 1 but also improves the safety of the electrical connection. The current sensor 150 may be a high-voltage supervise unit (HVSU).

[0075] By installing the current sensor 150, a module negative electrode connection terminal 220 can be formed to realize an effective connection between the high-voltage circuit 200 and the battery module 700, and the circuit board 300 can obtain the current of the high-voltage circuit 200 collected by the current sensor 150 through the current collecting pin 570, thereby ensuring the stability of the current of the high-voltage circuit 200 and contributing to the reliable use of the power distribution device 1. The current sensor 150 may be a shunt.

[0076] Furthermore, the second terminal of the current sensor 150 is overlap-connected to the second terminal of the main negative cutoff switch core 232 and is electrically connected thereto, and there is no need to install a conductive structure (e.g., a conductive copper bar or wire) between the current sensor 150 and the main negative cutoff switch core 232, which not only reduces the risk of sintering and excessive temperature rise between the current sensor 150 and the main negative cutoff switch core 232, but also improves the space utilization of the power distribution device 1, reduces the volume of the power distribution device 1, and reduces the weight and cost of the power distribution device 1.

[0077] Furthermore, as shown in FIGS. 1 to 6, the base 100 is configured to have a third positioning partition rib 160, which is located between the current sensor 150 and the high-voltage connection portion 110.

[0078] The third positioning partition rib 160 partitions the current sensor 150 and the high-voltage connection portion 110, and prevents electrical contact due to movement between the current sensor 150 and the high-voltage connection portion 110. connection This not only avoids the above problem but also provides a certain positioning effect for the current sensor 150 and the high voltage connection 110.

[0079] Preferably, as shown in Figures 1 and 4, the circuit protection device 240, the main positive cutoff switch core 231, the main negative cutoff switch core 232 and the current sensor 150 are arranged in sequence along the length of the base 100, in this way facilitating overlapping connections between multiple components in the high-voltage circuit 200 and advantageously eliminating conductive structures (e.g., conductive copper bars or conductor wires), thereby improving the space utilization rate of the power distribution device 1, reducing the volume, cost and weight of the power distribution device 1, ensuring the reliability of the electrical connection, and avoiding damage to the high-voltage circuit 200; and since the high-voltage circuit 200 is arranged mainly along the length of the base 100, the space of the base 100 can be utilized more effectively.

[0080] The low-voltage connection part 120 and the current sensor 150 are arranged along the width direction of the base 100. In this way, the low-voltage connection part 120 and the current sensor 150 do not need to be continuously arranged along the length direction of the base 100, which reduces the length of the power distribution device 1, further improves the space utilization rate of the power distribution device 1, and reduces the weight and cost of the power distribution device 1.

[0081] In some specific embodiments of the present disclosure, as shown in Figures 1, 2, 4 and 7, the high-voltage circuit 200 further includes a pre-charge circuit 170, a portion of which is integrated on a circuit board 300, the pre-charge circuit 170 including a pre-charge resistor 180 and a pre-charge cut-off switch 190, which are assembled on a base 100 and inserted into the circuit board 300, and which are connected in series to each other and in parallel to the main cut-off switch core 230.

[0082] The precharge resistor 180 and the precharge cutoff switch 190 are connected in series, and both the precharge resistor 180 and the precharge cutoff switch 190 are connected in series. Main cutoff switch core 230. The pre-charge cutoff switch 190 and the low-voltage circuit 400 are directly connected, that is, there is no need to install a transformer structure between the pre-charge cutoff switch 190 and the low-voltage circuit 400.

[0083] The installation of the pre-charge circuit 170 can prevent damage to the battery module 700 and the main shutoff switch core 230 and ensure the safety of the battery module 700 and the main shutoff switch core 230. The circuit board 300 can control the on / off of the pre-charge shutoff switch 190. The pre-charge shutoff switch 190 can be directly fixed to the base 100, eliminating the need to install a separate case for the pre-charge shutoff switch 190, thereby reducing the volume, weight, and cost of the power distribution device 1.

[0084] Furthermore, since both the pre-charge resistor 180 and the pre-charge cut-off switch 190 are inserted into the circuit board 300, there is no need to install a conductive structure (e.g., a conductive copper bar or conductor) between them and the circuit board 300, which simplifies the layout of the power distribution device 1, reduces the volume of the power distribution device 1, and improves the space utilization rate of the power distribution device 1.

[0085] The pre-charge resistor 180 may be a thermistor. When a thermistor is applied to the pre-charge circuit 170, the pre-charge circuit 170 has a simple structure, a small volume, is easily integrated with other components, has a certain degree of protection against pre-charge overheating, and is highly adaptable to the operating environment and resistance range.

[0086] For example, the resistance of a thermistor is sensitive to temperature, and the resistance of the thermistor increases gradually as the temperature rises and exceeds the transition temperature (Curie point). When applying a thermistor to the precharge circuit 170, only the range of resistance in which the thermistor operates normally (between the minimum resistance and the resistance corresponding to the Curie temperature) needs to be considered. The range of resistance of the thermistor and the range of withstand energy can be calculated based on required parameters such as voltage, load capacity, precharge completion voltage difference, and precharge time.

[0087] The minimum resistance of the thermistor is calculated as Rmin≧tmin / (C*ln(UB / UB-Ut)), and the maximum resistance of the thermistor is calculated as Rmax≦tmax / (C*ln(UB / UB-Ut)), where tmin is the minimum pre-charge time, tmax is the maximum pre-charge time, Rmin is the minimum resistance of the thermistor, Rmax is the maximum resistance of the thermistor, C is the capacitance of the capacitive load, Ut is the corresponding capacitive load end voltage during the pre-charge process, and UB is the voltage of the battery module 700.

[0088] After calculating the resistance range of the thermistor, calibration is performed based on the temperature-resistance characteristic curve of the selected thermistor, and the maximum and minimum values ​​of the corresponding resistance within a certain temperature range, for example, within a range of -60°C to 130°C, of ​​the thermistor are selected to calibrate the precharge time.

[0089] During the thermistor precharge process, the maximum energy released by the precharge circuit 170 to the thermistor is calculated as follows: Ech=1 / 2CU 2 and the energy that must be absorbed to raise the temperature of a single thermistor from the maximum operating ambient temperature Tamax to the Curie temperature Tc is Eth, where Eth=Cth*(Tc-Tamax), where Cth is the heat capacity of the thermistor (i.e., the energy that must be supplied to raise the temperature of the thermistor body by 1 K, expressed in joules).

[0090] Thermistors should maintain a low resistance under normal operating conditions, otherwise charging time will be affected. If the energy of the charging circuit is greater than the energy that a single thermistor can withstand, the energy can be resolved by connecting multiple thermistors in series or parallel to improve the circuit's voltage and energy withstand capabilities, i.e., n*§*Eth≧Ech, where § is a safety margin (typically 0.7-0.9), and n is the number of thermistors used. The number of thermistors calculated using this method not only meets the requirements but also reduces costs.

[0091] In some embodiments of the present disclosure, the resistance range of the single thermistor may be 20Ω to 200Ω, the ambient temperature range for use may be -60°C to 130°C, and the withstand voltage capability of the single thermistor may be 450VDC or less or 1000VDC or less.

[0092] The following describes an example of parameters for a voltage of 400 VDC, a capacitive load capacitance of 800 μf, and a response time of 1.5 seconds or less when the charging voltage difference is 98%. The parameters of a single thermistor are a resistance of 70 Ω, a withstand voltage of 500 VDC, a Curie temperature of 125°C, a resistance range of 56 Ω to 112 Ω for the thermistor within the range of -60°C to 125°C, and a heat capacity of 2.5 J / K. The number of thermistors to be used can be pre-selected using the following method: [Table 1]

[0093] Based on the above formula, the precharge is completed within 180ms to 360ms, the safety margin can be set to 0.8, the maximum ambient temperature is 90°C, the energy required for the thermistor to reach its Curie temperature is 70J, and the circuit energy is 64J. In other words, a single thermistor meets the requirements and meets the expected conditions.

[0094] The above is merely for describing some embodiments of the present disclosure, intended to further illustrate the possibilities of practical application, and is not intended to limit the scope of protection of the present disclosure.

[0095] Also, multiple contact The connection tab 500 further includes a pre-charged low-voltage positive electrode connection tab 580 and a pre-charged low-voltage negative electrode connection tab 590, a first end of the pre-charged low-voltage positive electrode connection tab 580 and a first end of the pre-charged low-voltage negative electrode connection tab 590 are respectively connected to the pre-charge cut-off switch 190, and a second end of the pre-charged low-voltage positive electrode connection tab 580 and a second end of the pre-charged low-voltage negative electrode connection tab 590 are respectively inserted into the circuit board 300 and electrically communicate with the low-voltage circuit 400.

[0096] In this way, an electrical connection can be realized between the pre-charge cut-off switch 190 and the low-voltage circuit 400 on the circuit board 300, so that the low-voltage circuit 400 can control the on / off of the pre-charge cut-off switch 190, and intermediate connecting members such as conductive wires and copper bars can be omitted between the pre-charge cut-off switch 190 and the circuit board 300, which can further simplify the layout of electrical connections within the power distribution device 1, thereby further reducing the volume of the power distribution device 1, improving the space utilization rate of the power distribution device 1, and reducing the weight and cost of the power distribution device 1.

[0097] 2 , the pre-charge cutoff switch 190 has a pre-charge high-voltage positive electrode connection tab 191 and a pre-charge high-voltage negative electrode connection tab 192. The pre-charge resistor 180 has a resistor high-voltage connection tab 181, and the circuit protection device 240 and the pre-charge resistor 180 are electrically connected by contact, thereby eliminating conductive structures such as copper bars and harnesses between the pre-charge cutoff switch 190 and the pre-charge resistor 180. The pre-charge high-voltage positive electrode connection tab 191, the pre-charge high-voltage negative electrode connection tab 192, and the resistor high-voltage connection tab 181 are inserted into the circuit board 300 and electrically connected to the portion of the pre-charge circuit 170 integrated on the circuit board 300, thereby eliminating intermediate connection members between the conventional pre-charge cutoff switch 190 and the pre-charge resistor 180 and the circuit board 300, i.e., copper bars and harnesses of the pre-charge portion.

[0098] 8 , pre-charge cutoff switch 190 has pre-charge high-voltage positive electrode connection tab 191 and pre-charge high-voltage negative electrode connection tab 192, pre-charge resistor 180 has resistor high-voltage positive electrode connection tab 182 and resistor high-voltage negative electrode connection tab 183, and pre-charge high-voltage positive electrode connection tab 191, pre-charge high-voltage negative electrode connection tab 192, resistor high-voltage positive electrode connection tab 182, and resistor high-voltage negative electrode connection tab 183 are inserted into circuit board 300 and electrically communicate with the portion of pre-charge circuit 170 integrated on circuit board 300. In this case, pre-charge resistor 180 does not need to be connected to circuit protection device 240, and pre-charge resistor 180 only needs to be connected to circuit board 300, which facilitates installation and removal and increases processing speed.

[0099] This ensures a more reliable electrical connection between both the pre-charge cut-off switch 190 and the pre-charge resistor 180 and the circuit board 300, with a clearer layout and less susceptible to problems such as excessive temperature rise or sintering of the connection points. By eliminating the large number of copper bars and harnesses in the conventional power distribution device, the layout of the electrical connections within the power distribution device 1 can be further simplified, thereby further reducing the volume of the power distribution device 1, improving the space utilization rate of the power distribution device 1, reducing the weight and cost of the power distribution device 1, further saving space in the battery pack 2, improving the energy density of the battery pack 2, and improving the driving range of the completed vehicle.

[0100] Preferably, as shown in FIG. 2 , the precharge circuit 170 further includes a precharge connection tab 171, the second terminal of the circuit protection device 240 is overlap-connected to the first terminal of the main positive shutdown switch core 231 and electrically communicates therewith, the first end of the precharge connection tab 171 is overlap-connected to the overlap-connection point between the second terminal of the circuit protection device 240 and the first terminal of the main positive shutdown switch core 231, and the second end of the precharge connection tab 171 is inserted into the circuit board 300 and electrically communicates with the part of the precharge circuit 170 integrated on the circuit board 300.

[0101] By installing the precharge connection tab 171, the precharge circuit 170 and Main cutoff switch core 230, and can also be used to detect the voltage of the precharge circuit 170. Since the electrical connection is achieved by inserting the precharge connection tab 171 and the circuit board 300, there is no need to install a conductive structure (e.g., a conductive copper bar or conductor) between the precharge connection tab 171 and the circuit board 300, and there is no need to install a conductive structure (e.g., a conductive copper bar or conductor) between the overlap connection point between the second terminal of the circuit protection device 240 and the first terminal of the main positive cutoff switch core 231 and the precharge connection tab 171, which simplifies the layout of the power distribution device 1, reduces the volume of the power distribution device 1, and improves the space utilization rate of the power distribution device 1.

[0102] The pre-charge connection tab 171 is integrally molded with the second terminal of the circuit protection device 240. In this way, the connection strength between the pre-charge connection tab 171 and the circuit protection device 240 is high, and the reliability of the electrical connection between the pre-charge connection tab 171 and the circuit protection device 240 can be guaranteed.

[0103] 2 and 4 , in some preferred embodiments of the present disclosure, the pre-charge cutoff switch 190, the pre-charge resistor 180, the main positive cutoff switch core 231, the main negative cutoff switch core 232, and the low-voltage connection part 120 are sequentially arranged along the length of the base 100, which not only further improves the space utilization rate of the base 100 but also ensures reliable connection of the circuit of the power distribution device 1. The pre-charge cutoff switch 190, the pre-charge resistor 180, and the circuit protection device 240 are arranged along the width of the base 100, which allows any two of the pre-charge cutoff switch 190, the pre-charge resistor 180, and the circuit protection device 240 to cross the length of the base 100, thereby reducing the length of the base 100 to a certain extent, and thereby reducing the volume of the power distribution device 1.

[0104] 2, 5, and 6, the base 100 is configured to have a main positive cutoff switch core mounting groove 101, a main negative cutoff switch core mounting groove 102, a pre-charge cutoff switch mounting groove 103, and a pre-charge resistor mounting groove 104. The main positive cutoff switch core 231 is fixed to the main positive cutoff switch core mounting groove 101 by a thermally conductive sealant, the main negative cutoff switch core 232 is fixed to the main negative cutoff switch core mounting groove 102 by a thermally conductive sealant, the pre-charge cutoff switch 190 is engaged with the pre-charge cutoff switch mounting groove 103 or is fixed to the pre-charge cutoff switch mounting groove 103 by a thermally conductive sealant, and the pre-charge resistor 180 is engaged with the pre-charge resistor mounting groove 104.

[0105] In this way, the connection strength between the four components, namely, the main positive cutoff switch core 231, the main negative cutoff switch core 232, the pre-charge cutoff switch 190, and the pre-charge resistor 180, and the base 100 is higher, which prevents the four components, namely, the main positive cutoff switch core 231, the main negative cutoff switch core 232, the pre-charge cutoff switch 190, and the pre-charge resistor 180, from moving relative to the base 100, thereby improving the reliability of the electrical connection within the power distribution device 1.

[0106] 2 to 6 , in some preferred embodiments of the present disclosure, the base 100 includes a base body 105 and a panel 106, both of which may be insulating members made of, for example, a plastic material. At least a portion of the high-voltage circuit 200 is assembled to the base body 105, the circuit board 300 is attached to the base body 105, the panel 106 is connected to the base body 105, and the high-voltage connection 110 and the low-voltage connection 120 are fixed to the panel 106. In this manner, the structural strength of the base body 105 and the stability of the attachment of the high-voltage circuit 200 and the circuit board 300 can be ensured. Furthermore, dividing the base 100 into two members not only facilitates the processing and manufacturing of the base body 105 and the panel 106, but also makes it easier to attach the high-voltage circuit 200, the circuit board 300, and the low-voltage circuit to the base 100.

[0107] Preferably, the base body 105 and the panel 106 are one piece or separate pieces. If the base body 105 and the panel 106 are one piece, they can be manufactured separately and then molded into one piece, thereby facilitating the installation of the high-voltage circuit 200, the circuit board 300, and the low-voltage circuit 400. Alternatively, the base body 105 and the panel 106 can be directly injection molded at one time to improve the connection strength between the base body 105 and the panel 106. In this way, the installation method of the base 100 is more diverse, and the structure of the base 100 can be adjusted according to different usage situations, improving the applicability of the base 100 and allowing the power distribution device 1 to meet the needs of different usage environments.

[0108] Hereinafter, the assembly process of the power distribution device 1 according to the embodiment of the present disclosure will be described with reference to the drawings.

[0109] First, the main positive cutoff switch core 231 and the main negative cutoff switch core 232 are fixed in the main positive cutoff switch core mounting groove 101 and the main negative cutoff switch core mounting groove 102 of the base 100, respectively, using a sealant; Next, the pre-charge resistor 180 and the pre-charge cut-off switch 190 are fitted into the pre-charge resistor mounting groove 104 and the pre-charge cut-off switch mounting groove 103 of the base 100, Then, the circuit protection device 240 is placed on the base 100, and an electrical connection with the pre-charge resistor 180 is established using a buckle. Next, the positive voltage collecting tab 550, the negative voltage collecting tab 560, and the current sensor 150 are fixed using bolts. The circuit board 300 is fixed to the base 100, and the connection tabs are aligned and inserted (e.g., the main positive low-voltage positive connection tab 510, the main positive low-voltage negative connection tab 520, the main negative low-voltage positive connection tab 530, the main negative low-voltage negative connection tab 540, the positive voltage collecting tab 550, the negative voltage collecting tab 560, the current collecting pin 570, and the pre-charge connection tab 171). The low-voltage connection portion 120 of the circuit board 300 is inserted into the preliminary hole of the base 100. Finally, the base 100 is sealed.

[0110] Hereinafter, a vehicle 3 according to an embodiment of the present disclosure will be described with reference to FIG. 9, and the vehicle 3 includes a battery pack 2 according to the above embodiment of the present disclosure.

[0111] By utilizing the battery pack 2 according to the above-described embodiment of the present disclosure, the vehicle according to the embodiment of the present disclosure has advantages such as a simple and compact structure, high space utilization rate, small volume, light weight, and low cost.

[0112] In some preferred embodiments of the present disclosure, the vehicle further includes a load 900 electrically connected to the battery pack. The battery pack is used to power the load. The load includes electrical equipment of the vehicle, such as a motor, an air conditioner compressor, a PTC (Positive Temperature Coefficient), a controller, etc.

[0113] Other configurations and operations of the power distribution device 1, the battery pack 2, and the vehicle 3 according to the embodiments of the present disclosure are known to those skilled in the art and will not be described in detail here.

[0114] In the description herein, a description using terms such as "particular embodiment," "specific example," or "example" means that the particular feature, structure, material, or characteristic described with reference to that embodiment or example is included in at least one embodiment or example of the present disclosure. In the description herein, exemplary references to the above terms do not necessarily refer to the same embodiment or example.

[0115] Although embodiments of the present disclosure have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of the present disclosure, and that the scope of the present disclosure is limited by the claims and their equivalents. [Explanation of symbols]

[0116] 1 Power distribution equipment 2 battery packs 3 vehicles 100 base 101 Main positive cutoff switch core mounting groove 102 Main / negative cutoff switch core mounting groove 103 Precharge cutoff switch mounting groove 104 Precharge resistor mounting groove 105 Base body 106 Panel 110 High-voltage connection 111 High voltage positive electrode pull-out tab 112 High voltage negative electrode pull-out tab 120 Low-voltage connection 130 First positioning partition rib 140 Second positioning partition rib 150 Current Sensor 160 Third positioning partition rib 170 Precharge Circuit 171 Precharge connection tab 180 Precharge resistor 181 Resistor high voltage connection tab 182 Resistor high voltage positive connection tab 183 Resistor high voltage negative electrode connection tab 190 Precharge cutoff switch 191 Precharge high voltage positive connection tab 192 Precharge high voltage negative connection tab 200 High-voltage circuit 210 Module positive connection terminal 220 Module negative connection terminal 230 Main disconnect switch core 231 Main positive cutoff switch core 232 Main / Negative Cutoff Switch Core 240 Circuit protection devices 300 Circuit Boards 400 Low voltage circuit 500 contact Continued tab 510 Main positive low voltage positive connection tab 520 Main positive low voltage negative electrode connection tab 530 Main negative low voltage positive connection tab 540 Main negative low voltage negative electrode connection tab 550 Positive voltage collection tab 560 Negative voltage collection tab 570 Current Collection Pins 580 Precharge low voltage positive connection tab 590 Precharge low voltage negative electrode connection tab 700 battery module 800 cases 900 load

Claims

1. The device includes a base (100), a high-voltage circuit (200), a circuit board (300), a low-voltage circuit (400), and a plurality of connection tabs (500); A high-pressure connection (110) and a low-pressure connection (120) are fixed to the base; At least a portion of the high-voltage circuit is assembled to the base, the high-voltage circuit is electrically connected to the high-voltage connection portion, the high-voltage circuit has a module positive connection terminal (210) and a module negative connection terminal (220), and the high-voltage circuit includes a main cutoff switch core (230) fixed to the base; the circuit board is attached to the base; the low-voltage circuit is integrated on the circuit board and electrically connected to the low-voltage connection; a first end of each of the connection tabs is electrically connected to the high-voltage circuit, and a second end of each of the connection tabs is inserted into the circuit board and electrically connected to the low-voltage circuit; The high-voltage circuit further includes a circuit protection device (240), the circuit protection device is assembled to the base, and a first terminal of the circuit protection device forms the module positive connection terminal; The power distribution device (1) is characterized in that there are a plurality of main shutoff switch cores, the plurality of main shutoff switch cores including at least a main positive shutoff switch core (231) and a main negative shutoff switch core (232), the second terminal of the circuit protection device is electrically connected to the first terminal of the main positive shutoff switch core, and the second terminal of the main positive shutoff switch core and the first terminal of the main negative shutoff switch core are each electrically connected to the high-voltage connection portion.

2. 2. The power distribution device of claim 1, wherein the plurality of connection tabs are parallel to one another and perpendicular to the circuit board.

3. the high voltage circuit is overlapped with the high voltage connection and electrically connected thereto; the low-voltage connection portion is inserted into the circuit board and electrically connected to the low-voltage circuit; 2. The power distribution device according to claim 1, wherein the components connected in the high voltage circuit are electrically connected by overlapping connections.

4. The power distribution device described in claim 1, characterized in that the multiple connection tabs include a main positive low voltage positive electrode connection tab (510), a main positive low voltage negative electrode connection tab (520), a main negative low voltage positive electrode connection tab (530) and a main negative low voltage negative electrode connection tab (540), a first end of the main positive low voltage positive electrode connection tab and a first end of the main positive low voltage negative electrode connection tab are each connected to the main positive cutoff switch core, a second end of the main positive low voltage positive electrode connection tab and a second end of the main positive low voltage negative electrode connection tab are each inserted into the circuit board and electrically connected to the low voltage circuit, a first end of the main negative low voltage positive electrode connection tab and a first end of the main negative low voltage negative electrode connection tab are each connected to the main negative cutoff switch core, and a second end of the main negative low voltage positive electrode connection tab and a second end of the main negative low voltage negative electrode connection tab are each inserted into the circuit board and electrically connected to the low voltage circuit.

5. The second terminal of the circuit protection device is overlap-connected to the first terminal of the main positive cutoff switch core and electrically connected thereto; The power distribution device according to claim 4, wherein the second terminal of the main positive cutoff switch core and the first terminal of the main negative cutoff switch core are respectively overlap-connected to the high-voltage connection portion and electrically connected thereto.

6. the plurality of connection tabs further include a positive voltage collecting tab (550) and a negative voltage collecting tab (560); a first end of the positive voltage collecting tab is lap-connected to a lap-connection point between the second terminal of the main positive cutoff switch core and the high-voltage connection portion, and a second end of the positive voltage collecting tab is inserted into the circuit board and electrically connected to the low-voltage circuit; 6. The power distribution device according to claim 5, wherein a first end of the negative voltage collecting tab is lap-connected to a lap-connection point between the first terminal of the main negative cutoff switch core and the high-voltage connection portion, and a second end of the negative voltage collecting tab is inserted into the circuit board and electrically connected to the low-voltage circuit.

7. The high-voltage connection portion includes a high-voltage positive electrode lead tab (111) and a high-voltage negative electrode lead tab (112), the high-voltage positive electrode lead-out tab is overlap-connected to the second terminal of the main positive cutoff switch core and an end of the positive electrode voltage collecting tab, and is electrically connected thereto; 7. The power distribution device according to claim 6, wherein the high-voltage negative electrode lead-out tab is overlap-connected to ends of the first terminal of the main negative cutoff switch core and the negative electrode voltage collection tab, and is electrically connected thereto.

8. the second terminal of the main positive cutoff switch core, the high-voltage positive electrode lead-out tab, and the positive electrode voltage collecting tab are connected together in order, a positive electrode rotation prevention positioning groove is provided in one of the high-voltage positive electrode lead-out tab and the positive electrode voltage collecting tab, and the other of the high-voltage positive electrode lead-out tab and the positive electrode voltage collecting tab is fitted into the positive electrode rotation prevention positioning groove; 8. The power distribution device according to claim 7, wherein the first terminal of the main negative cutoff switch core, the high-voltage negative electrode lead-out tab, and the negative electrode voltage collecting tab are connected in an overlapping manner in order, a negative electrode rotation prevention positioning groove is provided in one of the high-voltage negative electrode lead-out tab and the negative electrode voltage collecting tab, and the other of the high-voltage negative electrode lead-out tab and the negative electrode voltage collecting tab is fitted into the negative electrode rotation prevention positioning groove.

9. The base has a first positioning partition rib (130) and a second positioning partition rib (140); the first positioning partition rib is located between the circuit protection device and the high-voltage positive electrode lead-out tab, and between the circuit protection device and the positive electrode voltage collecting tab; 8. The power distribution device according to claim 7, wherein the second positioning partition rib is located between the high-voltage positive electrode lead-out tab and the high-voltage negative electrode lead-out tab, and between the positive electrode voltage collecting tab and the negative electrode voltage collecting tab.

10. The high-voltage circuit further includes a current sensor (150), a first terminal of the current sensor forms the module negative electrode connecting terminal, and a second terminal of the current sensor is electrically connected to a second terminal of the main negative cutoff switch core; 5. The power distribution device of claim 4, wherein the plurality of connection tabs further include current collecting pins (570), a first end of the current collecting pin connected to the current sensor, and a second end of the current collecting pin inserted into the circuit board and electrically communicating with the low voltage circuit.

11. The power distribution device according to claim 10, wherein the second terminal of the current sensor is overlap-connected to the second terminal of the main negative cutoff switch core and electrically connected thereto.

12. 11. The electrical power distribution device of claim 10, wherein the base is configured with a third positioning partition rib (160), the third positioning partition rib being located between the current sensor and the high voltage connection.

13. the circuit protection device, the main positive cutoff switch core, the main negative cutoff switch core, and the current sensor are sequentially arranged along a longitudinal direction of the base; The power distribution device according to claim 10 , wherein the low-voltage connection portion and the current sensor are arranged along a width direction of the base.

14. the high-voltage circuit further includes a precharge circuit (170), a portion of which is integrated on the circuit board, the precharge circuit including a precharge resistor (180) and a precharge cutoff switch (190), the precharge resistor and the precharge cutoff switch being assembled on the base and inserted into the circuit board, the precharge resistor and the precharge cutoff switch being connected in series with each other and in parallel with the main cutoff switch core; 5. The power distribution device of claim 4, wherein the plurality of connection tabs further include a pre-charged low-voltage positive connection tab (580) and a pre-charged low-voltage negative connection tab (590), a first end of the pre-charged low-voltage positive connection tab and a first end of the pre-charged low-voltage negative connection tab are respectively connected to the pre-charge cut-off switch, and a second end of the pre-charged low-voltage positive connection tab and a second end of the pre-charged low-voltage negative connection tab are respectively inserted into the circuit board to be electrically connected to the low-voltage circuit.

15. The pre-charge cut-off switch has a pre-charge high voltage positive electrode connection tab (191) and a pre-charge high voltage negative electrode connection tab (192), the pre-charge resistor has a resistor high voltage connection tab (181), the circuit protection device and the pre-charge resistor are electrically connected by contact, and the pre-charge high voltage positive electrode connection tab, the pre-charge high voltage negative electrode connection tab and the resistor high voltage connection tab are inserted into the circuit board and electrically connected to a part of the pre-charge circuit integrated on the circuit board, or 15. The power distribution device of claim 14, wherein the pre-charge cutoff switch has the pre-charge high-voltage positive electrode connection tab and the pre-charge high-voltage negative electrode connection tab, the pre-charge resistor has a resistor high-voltage positive electrode connection tab (182) and a resistor high-voltage negative electrode connection tab (183), and the pre-charge high-voltage positive electrode connection tab, the pre-charge high-voltage negative electrode connection tab, the resistor high-voltage positive electrode connection tab, and the resistor high-voltage negative electrode connection tab are inserted into the circuit board and electrically connected to a portion of the pre-charge circuit integrated on the circuit board.

16. The base includes a base body (105) and a panel (106); At least a part of the high-voltage circuit is assembled to the base body, and the circuit board is attached to the base body; The power distribution device according to claim 1 , wherein the panel is connected to the base body, and the high voltage connection portion and the low voltage connection portion are fixed to the panel.

17. A power distribution device (1) according to any one of claims 1 to 16, comprising a case (800), a battery module (700), The power distribution device is installed in the case, and the high-voltage connection portion (110) and the low-voltage connection portion (120) are exposed from the case; The battery pack (2) is characterized in that the battery module is installed in the case and is electrically connected to the module positive electrode connection terminal (210) and the module negative electrode connection terminal (220), respectively.

18. A vehicle (3) comprising the battery pack (2) of claim 17 and a load (900) electrically connected to the battery pack.

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