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 "Distribution Box of Power Battery System", 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 a power distribution device, a battery pack, and a vehicle. [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 a large number of 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 cost, 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, and thus provides a power distribution device having advantages of simple and compact structure, high space utilization, small volume, light weight, low cost, etc.

[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 embodiment of the first aspect 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 and electrically communicates 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 communicates 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 connection 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, the main shutoff switch core is multiple, the multiple 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, 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 multiple 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 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 respectively inserted into the circuit board and electrically communicated 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 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 respectively inserted into the circuit board and electrically communicated with the low voltage circuit.

[0011] In some embodiments of the present disclosure, the second terminal of the circuit protection device is superimposedly 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 each superimposedly connected to the high voltage connection portion and are in electrical communication therewith.

[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 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, a second end of the positive voltage collecting tab is inserted into the circuit board and electrically communicates with the low voltage circuit, 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 communicates 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 pull-out tab and a high voltage negative electrode pull-out tab, the high voltage positive electrode pull-out tab being overlap-connected to the second terminal of the main positive cut-off 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 pull-out tab being overlap-connected to the first terminal of the main negative cut-off 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 high voltage positive electrode pull-out tab, and the ends of 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 high voltage negative electrode pull-out tab, and the ends of 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 tab and between the circuit protection device and the positive electrode voltage collection tab, and the second positioning partition rib being located between the high voltage positive electrode pull tab and the high voltage negative electrode pull tab and between the positive electrode voltage collection tab and the negative electrode voltage collection 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 connection terminal, and a second terminal of the current sensor is electrically connected to a second terminal of the main negative cutoff switch core, and the plurality of 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 with a third locating partition rib, the third locating 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 of the base, and the low voltage connection and the current sensor are arranged along the width of the base.

[0020] In some embodiments of the present disclosure, the high voltage circuit further includes a pre-charge circuit, a portion of the pre-charge circuit is integrated on the circuit board, the pre-charge circuit includes a pre-charge resistor and a pre-charge cut-off switch, the pre-charge resistor and the pre-charge cut-off switch are assembled on the base and inserted into the circuit board, the pre-charge resistor and the pre-charge cut-off switch are connected in series with each other and in parallel to the main cut-off switch core, and the plurality of 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 are respectively connected to the pre-charge cut-off 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 are respectively inserted into the circuit board and electrically communicated 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 electrode connection tab and a pre-charge high voltage negative electrode connection tab, the pre-charge resistor has a resistor high voltage connection tab, the pre-charge cutoff switch 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 portion of the pre-charge circuit integrated on the circuit board. Preferably, 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 and a resistor high voltage negative electrode connection tab, 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.

[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 cutoff switch core and electrically communicates therewith, a first end of the precharge connection tab is overlap-connected to a overlap connection point between the second terminal of the circuit protection device and the first terminal of the main positive cutoff switch core, and a second end of the precharge connection tab is inserted into the circuit board and electrically communicates with a portion of the precharge circuit integrated on the circuit board.

[0023] In some embodiments of the present disclosure, the pre-charge 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 are arranged in sequence 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 shutoff switch core mounting groove, a main negative shutoff switch core mounting groove, a pre-charge shutoff switch mounting groove and a pre-charge resistor mounting groove, the main positive shutoff switch core is fixed to the main positive shutoff switch core mounting groove by a thermally conductive sealant, the main negative shutoff switch core is fixed to the main negative shutoff switch core mounting groove by a thermally conductive sealant, the pre-charge shutoff switch is engaged with the pre-charge shutoff switch mounting groove or is fixed to the pre-charge shutoff 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 may be 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 the 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 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. Effect of the Invention

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

[0031] The above and / or additional aspects and advantages of the present disclosure will become apparent and will be readily understood by reference to 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. [Diagram 2] FIG. 2 is a schematic configuration diagram of a power distribution device according to an embodiment of the present disclosure, viewed from another perspective. [Diagram 3] FIG. 13 is a schematic configuration diagram of a power distribution device according to another embodiment of the present disclosure. [Figure 4] FIG. 2 is an exploded view of a power distribution device according to an embodiment of the present disclosure. [Diagram 5] FIG. 2 is a schematic configuration diagram of a base of a power distribution device according to an embodiment of the present disclosure. [Figure 6] FIG. 2 is a schematic configuration diagram of a power distribution device according to an embodiment of the present disclosure, viewed from another angle. [Figure 7] FIG. 1 is a schematic circuit diagram of a power distribution device according to an embodiment of the present disclosure. [Figure 8] FIG. 13 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 PREFERRED EMBODIMENTS

[0033] Hereinafter, the embodiments of the present disclosure will be described in detail, and examples of the embodiments are shown in the drawings, in which 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 illustrative and are merely for interpreting 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," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial direction," "radial direction," "circumferential direction," and the like are orientations or positional relationships indicated 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 portion 110 and a low voltage connection portion 120 are fixed to the base 100. A high voltage circuit 200 is at least partially assembled to the base 100 and electrically communicates with the high voltage connection portion 110. The high voltage circuit 200 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 communicates with the low voltage connection portion 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] With regard to the term "main shutoff switch core 230", the main shutoff switch may include one or more of a relay, an IGBT (Insulated Gate Bipolar Transistor), and a MOS transistor (MOSFET, field effect transistor), but is not limited thereto. The "core" is a part of the main shutoff switch that mainly performs its function, and can be understood as an internal functional part excluding the housing of the main shutoff switch itself, that is, the main shutoff switch core 230 is the remaining part excluding the housing of the main shutoff switch itself. A battery management controller (BMC) may be integrated in the circuit board 300.

[0041] In the battery pack 2 of 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 transformation 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 transformation 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 transformation structure, thereby realizing the 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 part 110 and the low voltage connection part 120 are fixed to the base 100, and the high voltage connection part 110 and the low voltage connection part 120 can be exposed from the case, so that the high voltage connection part 110 can realize the supply of power to the high voltage electrical equipment of the vehicle, and the low voltage connection part 120 may include a communication pin for communicating with a controller of the vehicle so as to realize real-time control of the power distribution device 1, and the low voltage connection part 120 may further include a low voltage plug for supplying power to the low voltage electrical equipment of the vehicle. The base 100 fixes the relative positions of both the high voltage connection part 110 and the low voltage connection part 120 with the base 100, thereby preventing contact between the high voltage connection part 110 and the low voltage connection part 120 and ensuring the safety of the electrical connection of the power distribution device 1. The high voltage connection part 110, the low voltage connection part 120, and the base 100 can be designed separately to improve the flexibility of the connection. 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] And 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; the main shutoff switch core 230 is directly utilized, and the main shutoff switch core 230 is fixed and protected using the base 100, thus eliminating the original case of the conventional shutoff switch, and the structure is 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 A first end of the connecting tab 500 is connected to the high voltage circuit 200 and electrically communicates therewith, and a second end is inserted into the circuit board 300 and is disposed to electrically communicate with the low voltage circuit 400 .

[0046] In other words, each contact A first end of the connecting tab 500 is connected to the high voltage circuit 200. 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 in the circuit board 300 to control the on / off of the main cutoff switch core 230, and 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, and the layout is clear, making it less susceptible to problems such as excessive temperature rise and sintering of the connection points. By eliminating the large amount 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 the space of the battery pack 2, improving the energy density of the battery pack 2, and improving the driving capability of the completed vehicle.

[0048] Thus, 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] By utilizing the power distribution device 1 according to the above embodiment of the present disclosure, the battery pack 2 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.

[0050] In some specific embodiments of the present disclosure, as shown in FIGS. contact The connection tabs 500 are parallel to each other and perpendicular to the circuit board 300. The area in which the high voltage circuit 200 is arranged is approximately parallel to the circuit board 300. contact By installing the connection tab 500 vertically 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 The 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 part 110 and electrically communicates therewith, and the main shutoff switch core 230 can have a sufficiently long pull-out portion, so that the high-voltage circuit 200 and the high-voltage connection part 110 are partially overlapped and overlapped to realize an overlap connection between the two, and such an overlap connection realizes electrical communication, and thus the conventional intermediate connection members between the high-voltage circuit and the high-voltage connection part, i.e., the copper bar and harness of the high-voltage part, can be omitted.

[0052] Also, the low voltage connection part 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 connection part 120 can be electrically communicated by the circuit board 300, thus making it possible to omit intermediate connection members between the low voltage circuit and the low voltage connection part in the related art, i.e., the copper bar and harness in the low voltage part, etc. And the components to be connected in the high voltage circuit 200 are electrically communicated by overlapping connection, i.e., the components to be connected in the high voltage circuit 200 are partially overlapped to realize the overlapping connection, and the electrical communication is realized by such overlapping connection, thus making it possible to omit intermediate connection members in the related art high voltage circuit, i.e., the copper bar and harness in the high voltage part, etc.

[0053] As a result, the electrical connections between the high-voltage circuit 200 and the high-voltage connection part 110, between the connected components in the high-voltage circuit 200 itself, and between the low-voltage circuit 400 and the low-voltage connection part 120 are more reliable and the layout is clear, making it less likely to cause problems such as excessive temperature rise or sintering of the connection points. By eliminating the large amount of copper bars and harnesses in the conventional power distribution device, the layout of the electrical connections in 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, and 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.

[0054] In some specific embodiments of the present disclosure, as shown in Figures 1, 2 and 4, the high voltage circuit 200 further includes a circuit protection device 240, which is assembled to the base 100, and a first terminal of the circuit protection device 240 forms the module positive electrode connection terminal 210. The circuit protection device 240 may include, but is not limited to, one or more 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 occurs in the high voltage circuit 200 where the current is too high and the voltage is too high, the circuit protection device 240 can automatically cut off in a timely manner to cut off the high voltage circuit 200 and achieve the purpose of protecting other components in the high voltage circuit 200.

[0055] The main shutoff switch core 230 is provided in plurality and includes at least a main positive shutoff switch core 231 and a main negative shutoff switch core 232, and the second terminal of the circuit protection device 240 is electrically connected to the first terminal of the main positive shutoff switch core 231, and the second terminal of the main positive shutoff switch core 231 and the first terminal of the main negative shutoff switch core 232 are each electrically connected to the high-voltage connection portion 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., no need to install a case on the relay), an IGBT core (i.e., no need to install a case on the IGBT), and a MOS transistor core (i.e., no need to install a case on the MOS transistor). The main negative cutoff switch core 232 may include, but is not limited to, one or more of a relay core (i.e., no need to install a case on the relay), an IGBT core (i.e., no need to install a case on the IGBT), and a MOS transistor core (i.e., no need to install a case on the MOS transistor).

[0057] Incidentally, 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 connected to 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 connected to each other. Main negative cutoff switch core 232 are both kept on, electrical continuity of the high voltage circuit 200 can be realized, and at this time, the battery module 700 can supply power to the high voltage electrical equipment of the vehicle through the high voltage connection part 110. Since 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 provided, and the on / off of the main positive cutoff switch core 231 and the main negative cutoff switch core 232 are prevented from interfering with each other, so that the high voltage circuit 200 can be shut off very reliably, the safety of the high voltage circuit 200 can be improved, and the safety of the power supply to the high voltage electrical equipment of the vehicle can be guaranteed.

[0059] In addition, multiple contact The connection tab 500 includes 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, and 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 respectively 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 realizes 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 realizes 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] The main positive cutoff switch core 231 is directly connected to the circuit board 300 in an insertion manner by the main positive low voltage positive electrode connection tab 510 and the main positive low voltage negative electrode connection tab 520, so that the conductive structure (e.g., conductive copper bar or conductor) between the main positive cutoff switch core 231 and the circuit board 300 is omitted, and a reliable electrical connection between the main positive cutoff switch core 231 and the circuit board 300 can be ensured, which is advantageous to reduce the volume, cost, and weight of the power distribution device 1. The main negative cutoff switch core 232 is directly connected to the circuit board 300 in an insertion manner by the main negative low voltage positive electrode connection tab 530 and the main negative low voltage negative electrode connection tab 540, so that the conductive structure (e.g., conductive copper bar or conductor) between the main negative cutoff switch core 232 and the circuit board 300 is omitted, and a reliable electrical connection between the main negative cutoff switch core 232 and the circuit board 300 can be ensured, which is advantageous to reduce 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 lap-connected to the first terminal of the main positive cut-off switch core 231 and electrically communicates therewith, and the second terminal of the main positive cut-off switch core 231 and the first terminal of the main negative cut-off switch core 232 are lap-connected to the high-voltage connection portion 110 and electrically communicates therewith.

[0063] In this way, there is no need to install a conductive structure (e.g., conductive copper bar) between the circuit protection device 240 and the main shutoff switch core 230, and the space utilization rate of the power distribution device 1 is higher, so the volume is smaller, the weight is lighter, and the cost is lower, which is favorable for improving the reliability of the electrical connection between the circuit protection device 240 and the main shutoff switch core 230, and problems such as excessive temperature rise and sintering of the connection parts are less likely to occur. And there is no need to install a conductive structure (e.g., 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 of the main positive shutoff switch core 231 and the main negative shutoff switch core 232, ensures electrical connection, makes the layout simpler, and is less likely to cause problems such as excessive temperature rise and sintering of the connection parts.

[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 a lap-connection point between the second terminal of the main positive cutoff switch core 231 and the high voltage connection part 110, a second end of the positive voltage collecting tab 550 is inserted into the circuit board 300 and electrically communicates with the low voltage circuit 400, a first end of the negative voltage collecting tab 560 is lap-connected to a lap-connection point between the first terminal of the main negative cutoff switch core 232 and the high voltage connection part 110, and a second end of the negative voltage collecting tab 560 is inserted into the circuit board 300 and electrically communicates with the low voltage circuit 400.

[0065] In this way, the circuit board 300 can collect the voltage of the high voltage circuit 200 through the positive voltage collecting tab 550 and the negative voltage collecting tab 560, and further monitor the voltage of the high voltage circuit 200 and the presence or absence of sintering, 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, the high voltage connection portion 110 includes a high voltage positive electrode draw tab 111 and a high voltage negative electrode draw tab 112. The high voltage positive electrode draw tab 111 is overlappingly connected to the second terminal of the main positive cutoff switch core 231 and the end of the positive electrode voltage collection tab 550, respectively, and is in electrical communication therewith. Thus, there is no need to install a conductive structure (e.g., a conductive copper bar or conductor) between the high voltage positive electrode draw tab 111 and the 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 the high voltage positive electrode draw tab 111 and the positive electrode voltage collection tab 550. The high voltage negative electrode draw tab 112 is overlappingly 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 wire) 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 wire) 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 between the high voltage connection part 110 and the high voltage circuit 200 can be realized, 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 the 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 the space of the battery pack 2, improving the energy density of the battery pack 2, and improving the driving capability of the completed vehicle.

[0068] In some embodiments of the present disclosure, the ends of the second terminal, the high voltage positive electrode pull-out tab 111, and the positive electrode voltage collecting tab 550 of the main positive cutoff switch core 231 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 111 and the positive electrode voltage collecting tab 550, and the other of the high voltage positive electrode pull-out tab 111 and the positive electrode voltage collecting tab 550 is fitted into the positive electrode rotation prevention positioning groove. The ends of the first terminal, the high voltage negative electrode pull-out tab 112, and the negative electrode voltage collecting tab 560 of the main negative cutoff switch core 232 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 112 and the negative electrode voltage collecting tab 560, and the other of the high voltage negative electrode pull-out tab 112 and the negative electrode voltage collecting 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 to ensure the reliability of voltage collection, a positive electrode anti-rotation positioning groove may be installed on the high voltage positive electrode pull-out tab 111, and a negative electrode anti-rotation positioning groove may be installed 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 improving the accuracy of voltage collection, while at the same time 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 by 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, and the first positioning partition rib 130 is 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 is 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 partitions the positive electrode voltage collecting tab 550 and the negative electrode voltage collecting tab 560, and prevents electrical interference caused by movement between the circuit protection device 240 and the high voltage positive electrode pull-out tab 111. connection This not only avoids electrical interference caused by movement between the circuit protection device 240 and the positive voltage collecting tab 550, but also serves to separate the circuit protection device 240 and the positive voltage collecting tab 550. connection 13 and 14. 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 the second terminal of the main negative cutoff switch core 232. contactThe connection 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, thus eliminating the copper bar or harness between the current collecting pin 570 and the circuit board 300 and the low-voltage circuit 400, and realizing the electrical connection between the current collecting pin 570 and the circuit board 300 and the low-voltage circuit 400, thereby not only saving space in the power distribution device 1 but also improving 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 connecting 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 being advantageous to realizing 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 rate 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, and the third positioning partition rib 160 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 interference 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 cut-off switch core 231, the main negative cut-off switch core 232 and the current sensor 150 are arranged in sequence along the length direction of the base 100, in this way, it is advantageous to facilitate overlapping connections between multiple components in the high-voltage circuit 200 and omit conductive structures (e.g., conductive copper bars or conductors), 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, avoiding damage to the high-voltage circuit 200, and since the high-voltage circuit 200 is mainly arranged along the length direction 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, there is no need for the low-voltage connection part 120 and the current sensor 150 to be continuously arranged along the length direction of the base 100, thereby reducing the length of the power distribution device 1, further improving the space utilization rate of the power distribution device 1, and reducing 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 the pre-charge circuit 170 is integrated into a circuit board 300, the pre-charge circuit 170 includes a pre-charge resistor 180 and a pre-charge cut-off switch 190, the pre-charge resistor 180 and the pre-charge cut-off switch 190 are assembled on a base 100 and inserted into the circuit board 300, and the pre-charge resistor 180 and the pre-charge cut-off switch 190 are connected in series with each other and in parallel to the main cut-off switch core 230.

[0082] The pre-charge resistor 180 and the pre-charge cut-off switch 190 are connected in series. After the pre-charge resistor 180 and the pre-charge cut-off switch 190 are connected in series, Main cutoff switch core 230. And 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 pre-charge circuit 170 is provided to prevent damage to the battery module 700 and the main cutoff switch core 230, and ensure the safety of the battery module 700 and the main cutoff switch core 230. The circuit board 300 can control the on / off of the pre-charge cutoff switch 190. The pre-charge cutoff switch 190 may be directly fixed to the base 100, and there is no need to provide a separate case for the pre-charge cutoff switch 190, which can reduce the volume of the power distribution device 1 and the 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 wire) 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 easy to integrate with other components, has a certain protection capability against pre-charge overheating, and is highly adaptable to the operating environment and resistance range.

[0086] For example, the resistance value of a thermistor is sensitive to temperature, and the thermistor has a characteristic that its resistance value increases stepwise when the temperature rises and exceeds a transition temperature (Curie point). When applying a thermistor to the precharge circuit 170, only the resistance value range in which it operates normally (between the minimum resistance and the resistance value corresponding to the Curie temperature) needs to be considered. The resistance value range and the range of withstandable energy of the thermistor can be calculated based on parameter requirements 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 precharge time, tmax is the maximum precharge 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 precharge 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 within a certain temperature range, for example, within the range of -60°C to 130°C, the maximum and minimum corresponding resistance values ​​of the thermistor within this temperature range are selected to calibrate the precharge time.

[0089] During the precharging process of the thermistor, the maximum energy discharged by the precharge circuit 170 to the thermistor is calculated as Ech=1 / 2CU. 2 and the energy that needs to 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 needs to be supplied to raise the temperature of the thermistor body by 1 K, in Joules).

[0090] The thermistor should maintain a low resistance state under normal use conditions, otherwise it will affect the charging time. When the energy of the charging circuit is greater than the energy that a single thermistor can withstand, the energy can be decomposed by connecting multiple thermistors in series or parallel to improve the voltage resistance and energy resistance of the circuit, that is, n*§*Eth≧Ech, § is a safety margin, usually 0.7-0.9, and n is the number of thermistors used. The number of thermistors used obtained by this calculation method can not only meet the requirements, but also reduce costs.

[0091] In some embodiments of the present disclosure, the resistance range of the single thermistor may be 20Ω to 200Ω, the operating temperature range is −60° C. to 130° C., and the withstand voltage capability of the single thermistor is 450 VDC or less or 1000 VDC 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 within 1.5 seconds when the charging voltage difference is 98%, and 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 a 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 with reference to the following method. [Table 1]

[0093] Based on the above formula, the precharge is completed within a time of 180ms to 360ms, the safety margin can be selected as 0.8, the maximum environmental temperature is 90°C, the energy required for the thermistor to reach its own Curie temperature is 70J, and the circuit energy is 64J, that is, a single thermistor meets the requirements and meets the expected conditions.

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

[0095] In addition, 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 communicated with the low voltage circuit 400.

[0096] In this way, an electrical connection between the pre-charge cut-off switch 190 and the low-voltage circuit 400 in the circuit board 300 can be realized, 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 conductors and copper bars can be omitted between the pre-charge cut-off switch 190 and the circuit board 300, so that 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, and reducing the weight and cost of the power distribution device 1.

[0097] In some embodiments of the present disclosure, as shown in FIG. 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, and thus conductive structures such as copper bars and harnesses between the pre-charge cutoff switch 190 and the pre-charge resistor 180 can be omitted. 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 part of the pre-charge circuit 170 integrated in the circuit board 300, and thus intermediate connection members between both 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 parts, can be omitted.

[0098] In some other embodiments of the present disclosure, as shown in Fig. 8, 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 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 191, the pre-charge high voltage negative electrode connection tab 192, the resistor high voltage positive electrode connection tab 182 and the resistor high voltage negative electrode connection tab 183 are inserted into the circuit board 300 and electrically communicate with the part of the pre-charge circuit 170 integrated in the circuit board 300. At this time, it is not necessary to connect the pre-charge resistor 180 to the circuit protection device 240, and the pre-charge resistor 180 needs to be connected only to the circuit board 300, which makes it easy to attach and detach and has a high processing speed.

[0099] As a result, the electrical connection between both the pre-charge cut-off switch 190 and the pre-charge resistor 180 and the circuit board 300 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 amount of copper bars and harnesses in the conventional power distribution device, the layout of the electrical connections in 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 capability 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 lap-connected to the first terminal of the main positive cutoff switch core 231 and electrically communicates therewith, the first end of the precharge connection tab 171 is lap-connected to the lap-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 second end of the precharge connection tab 171 is inserted into the circuit board 300 and electrically communicates with the portion of the precharge circuit 170 integrated on the circuit board 300.

[0101] By providing a 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 pre-charge circuit 170. Since the electrical connection is achieved by inserting the pre-charge 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 pre-charge 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 cut-off switch core 231 and the pre-charge connection tab 171. This 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 formed 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] In some preferred embodiments of the present disclosure, as shown in Figures 2 and 4, 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 direction of the base 100, thus not only further improving the space utilization rate of the base 100 but also ensuring a reliable connection of the circuit of the power distribution device 1. And the pre-charge cutoff switch 190, the pre-charge resistor 180 and the circuit protection device 240 are arranged along the width direction of the base 100, thus any two of the pre-charge cutoff switch 190, the pre-charge resistor 180 and the circuit protection device 240 cross in the length direction of the base 100, and the length of the base 100 can be reduced to a certain extent, thereby reducing the volume of the power distribution device 1.

[0104] In some preferred embodiments of the present disclosure, as shown in Figures 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 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 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 connections within the power distribution device 1.

[0106] In some preferred embodiments of the present disclosure, as shown in FIGS. 2 to 6, the base 100 includes a base body 105 and a panel 106, and both the base body 105 and the panel 106 may be insulating members made of, for example, plastic materials. At least a part 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 part 110 and the low-voltage connection part 120 are fixed to the panel 106. In this way, the structural strength of the base body 105 can be guaranteed, and the stability of the attachment of the high-voltage circuit 200 and the circuit board 300 can be guaranteed. Furthermore, by dividing the base 100 into two members, not only can the processing and manufacturing of the base body 105 and the panel 106 be facilitated, but also the high-voltage circuit 200, the circuit board 300, and the low-voltage circuit can be easily attached to the base 100.

[0107] Preferably, the base body 105 and the panel 106 are one body or separate bodies. If the base body 105 and the panel 106 are one body, the base body 105 and the panel 106 can be manufactured separately and then molded into one body, 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 manner of the base 100 is more diverse, and the structure of the base 100 can be adjusted according to different usage situations, which improves the applicability of the base 100 and allows the power distribution device 1 to meet the needs of different usage environments.

[0108] Hereinafter, a process for assembling 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 realized by a buckle. Next, the positive voltage collecting tab 550, the negative voltage collecting tab 560, and the current sensor 150 are fixed using bolts, and the circuit board 300 is fixed to the base 100, and each connection tab is aligned and inserted (for example, 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, with reference to FIG. 9, a vehicle 3 according to an embodiment of the present disclosure will be described, 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 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 electric devices 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 herein.

[0114] In the description herein, a description using a term such as "specific embodiment," "example," or "embodiment" means that the specific feature, structure, material, or characteristic described with reference to the embodiment or example is included in at least one embodiment or example of the present disclosure. In the description herein, exemplary descriptions of 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 can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and objectives of the present disclosure, and the scope of the present disclosure is limited by the claims and their equivalents. [Explanation of symbols]

[0116] 1 Power distribution equipment 2 Battery pack 3. Vehicle 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 Panel 106 110 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 3rd 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 cutoff switch core 231 Main positive cutoff switch core 232 Main / negative cutoff switch core 240 Circuit protection devices 300 Circuit Board 400 Low voltage circuit 500 contact Continued tab 510 Main positive low voltage positive connection tab 520 Main positive low voltage negative 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 Precharged low voltage positive connection tab 590 Precharge low voltage negative 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 high and low voltage connection tabs (500); A high-voltage connection (110) and a low-voltage 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 power distribution device (1), characterized in that a first end of each of the high and low voltage connection tabs is electrically connected to the high voltage circuit, and a second end of each of the high and low voltage connection tabs is inserted into the circuit board and electrically connected to the low voltage circuit.

2. 2. The power distribution device of claim 1, wherein said plurality of high and low voltage connection tabs are parallel to one another and perpendicular to said 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 in the high voltage circuit are electrically connected by overlap connections.

4. 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 main shutoff switch core is provided in a plurality of types, and the plurality of main shutoff switch cores include at least a main positive shutoff switch core (231) and a main negative shutoff switch core (232). A second terminal of the circuit protection device is electrically connected to a first terminal of the main positive shutoff switch core. The second terminal of the main positive shutoff switch core and the first terminal of the main negative shutoff switch core are electrically connected to the high voltage connection portion, respectively.

2. The power distribution device according to claim 1, wherein the plurality of high and low voltage connection tabs include a main positive low voltage positive connection tab (510), a main positive low voltage negative connection tab (520), a main negative low voltage positive connection tab (530), and a main negative low voltage negative connection tab (540), a first end of the main positive low voltage positive connection tab and a first end of the main positive low voltage negative connection tab are respectively connected to the main positive shutoff switch core, a second end of the main positive low voltage positive connection tab and a second end of the main positive low voltage negative connection tab are respectively inserted into the circuit board and electrically connected to the low voltage circuit, a first end of the main negative low voltage positive connection tab and a first end of the main negative low voltage negative connection tab are respectively connected to the main negative shutoff switch core, and a second end of the main negative low voltage positive connection tab and a second end of the main negative low voltage negative connection tab are respectively 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 overlap-connected to the high voltage connection portion and electrically connected thereto.

6. The plurality of high and low voltage 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 overlapped and connected to an end of the second terminal of the main positive cutoff switch core and 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 extraction tab is overlapped and electrically connected to ends of the first terminal and the negative electrode voltage collection tab of the main negative cutoff switch core.

8. the second terminal of the main positive cutoff switch core, the high voltage positive electrode pull-out tab, and the end of the positive electrode voltage collecting tab are stacked and connected in order, a positive electrode rotation prevention positioning groove is provided on 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; 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 pull-out tab, and the negative electrode voltage collecting tab are stacked and connected in sequence, a negative electrode rotation prevention positioning groove is provided on 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.

9. The base is configured to have 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 pull-out tab, and between the circuit protection device and the positive electrode voltage collecting tab; 8. The power distribution device of 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 high and low voltage 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. 11. The power distribution device of claim 10, wherein the second terminal of the current sensor is overlap-connected and electrically connected to the second terminal of the main negative cutoff switch core.

12. 11. The electrical power distribution device of claim 10, wherein the base is configured with a third locating partition rib (160), the third locating 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 connected in parallel to the main cutoff switch core; 5. The power distribution device of claim 4, wherein the plurality of high and low voltage 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 portion 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 precharge circuit includes:

15. The power distribution device of claim 14, further comprising a precharge connection tab (171), wherein 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, a first end of the precharge connection tab is overlap-connected to a overlap connection point between the second terminal of the circuit protection device and the first terminal of the main positive cutoff switch core, and a second end of the precharge connection tab is inserted into the circuit board and electrically connected to a portion of the precharge circuit integrated on the circuit board.

17. 17. The power distribution device of claim 16, wherein the pre-charge connection tab is integrally molded with the second terminal of the circuit protection device.

18. 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 portion are sequentially arranged along a longitudinal direction of the base, The power distribution device of claim 14 , wherein the pre-charge cut-off switch, the pre-charge resistor and the circuit protection device are arranged along a width direction of the base.

19. The base 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 is fixed to the main positive cutoff switch core mounting groove by a thermally conductive sealant; The main / negative cutoff switch core is fixed in the main / negative cutoff switch core mounting groove by a thermally conductive sealant; The pre-charge cut-off switch is engaged with the pre-charge cut-off switch mounting groove or is fixed to the pre-charge cut-off switch mounting groove by a thermally conductive sealant; 15. The power distribution device of claim 14, wherein the pre-charge resistor is engaged with the pre-charge resistor mounting groove.

20. 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 any one of claims 1 to 19, characterized in that the panel is connected to the base body, and the high voltage connection and the low voltage connection are fixed to the panel.

21. The power distribution device according to claim 20, wherein the base body and the panel are integral or separate.

22. A power distribution device (1) according to any one of claims 1 to 21, and 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.

23. A vehicle (3) comprising the battery pack (2) according to claim 22 and a load (900) electrically connected to the battery pack.

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