Power distribution box for vehicle

Abstract

The invention provides a distribution box for a vehicle, which can be provided with at least more than two different current sensors in a replaceable manner to detect current, and comprises a base with a current sensor accommodating cavity for accommodating the current sensors, the current sensor accommodating cavity comprises a bottom wall at the lower end and a circumferential side wall, the side walls include first and second side walls opposed to each other in a first direction and third and fourth side walls opposed to each other in a second direction crossing the first direction. When the size of each current sensor in the first direction when the current sensor is installed is regarded as the width of the current sensor, the width of at least one type of current sensor is different from the width of the other type of current sensor. And the current sensor accommodating cavity is configured to enable the distance between the first side wall and the second side wall to be matched with the current sensor with the largest width among the different current sensors.

Description

Technical Field

[0001] The present invention relates to a distribution box for a vehicle, and in particular to a distribution box which is used in a new energy vehicle and can be used for a variety of current sensors. Background Art

[0002] As a circuit distribution box for electricity consumption, the distribution box is the control center that directs various components in the power supply line to reasonably distribute electric energy. It is the control link that reliably receives the upper power supply and correctly feeds out the load electric energy. It is also the key to obtaining satisfactory power supply quality. There are many electrical components installed in the distribution line, such as current sensors, relays, etc., which can monitor current and power through current sensors.

[0003] As for the distribution box, for example, in the field of new energy vehicles, the high-voltage distribution box is a very important part. It is used to supply the high-voltage direct current of the high-voltage battery to the high-voltage electrical appliances of the whole vehicle, receive the direct current from the on-board charger or the non-on-board charger, and charge the high-voltage battery. It also has other auxiliary detection functions such as current detection and leakage monitoring.

[0004] In existing distribution boxes, generally speaking, the installation location for installing the current sensor is dedicated, and only a specific current sensor can be installed. Other types of sensors cannot be installed, and the replacement function of different sensors from different manufacturers cannot be realized.

[0005] Therefore, when installing the electrical components of the distribution box, the distribution box must be redesigned for different current sensors from different manufacturers, which is undoubtedly troublesome, not only time-consuming and labor-intensive but also increases economic costs. Summary of the invention

[0006] In order to solve the above-mentioned technical problems of traditional distribution boxes, cope with the current situation of diversified battery capacity of new energy vehicles, and meet customers' needs for replacement configuration of various types of current sensors in distribution boxes, the present invention provides a distribution box for vehicles, which can replaceably install at least two or more different current sensors to detect current, greatly improving the versatility. In addition to matching different current detection requirements, it can also avoid replacing with other products when there is a shortage in the supply chain, ensuring stable production of high-voltage distribution boxes and optimizing costs. In addition, the present invention can effectively utilize the installation space of the high-voltage distribution box, has a compact structure, and avoids the phenomenon of idle installation cavity structure when replacing different types of current sensors.

[0007] Specifically, the present invention provides a distribution box for a vehicle, in which at least two different current sensors can be installed interchangeably to detect current, and the distribution box includes: a distribution box base made of resin, the distribution box base includes a current sensor accommodating cavity for accommodating the current sensor, the current sensor accommodating cavity includes a bottom wall at the lower end and a circumferential side wall, the side wall includes a first side wall and a second side wall opposite to each other in a first direction, and a third side wall and a fourth side wall opposite to each other in a second direction intersecting the first direction, so as to be able to surround the current sensor in the circumferential direction. Each of the current sensors can be equipped with a bus bar for current to flow through, so that the two ends of the bus bar extend outward from the current sensor respectively, and when the current sensor is installed in the current sensor accommodating cavity, the extension direction of the bus bar is consistent with the first direction. On the distribution box base, two or more fixing parts are arranged at the position outside the side wall of the current sensor accommodating cavity, which are used to fix the two ends of the bus bar extending outward from the current sensor. When the dimension of each current sensor in the first direction when in the installed state is regarded as the width of the current sensor, the width of at least one current sensor is different from the width of other types of current sensors, and the current sensor accommodating cavity is configured to match the distance between the first side wall and the second side wall with the current sensor with the largest width among the different current sensors.

[0008] According to the distribution box with the above configuration, since the current sensor accommodating cavity is configured so that the distance between the first side wall and the second side wall matches the current sensor with the largest thickness in the first direction among the different current sensors, for different types of current sensors, in addition to being fixed by the fixing part with the help of the bus bar, the current sensor can also be wrapped with the help of the first side wall and the second side wall to apply a retaining force to the current sensor and thus fix the current sensor. The appropriate fixing method can be selected according to the shape of the current sensor to be installed to achieve universal installation.

[0009] Preferably, in the above-mentioned distribution box, the fixing part includes: a first fixing part used as a common fixing part, which is arranged close to the first side wall; and a second fixing part and a third fixing part used as optional fixing parts, which are arranged close to the second side wall and are staggered with each other in the first direction, and the first fixing part is configured to fix one of the two ends of the bus bar, and the second fixing part and the third fixing part are configured so that one of them is selected to fix the other end of the two ends of the bus bar.

[0010] According to the distribution box having the above structure, since a common fixing portion is provided and one end of the busbar can be effectively fixed by only one fixing portion, space is effectively saved and utilized. In addition, since a second fixing portion and a third fixing portion are provided which are staggered with each other in a first direction and can be used in conjunction with the first fixing portion, an appropriate fixing point can be selected according to the shape of the current sensor to be installed, thereby achieving universal installation.

[0011] Preferably, in the above-mentioned distribution box, at least the first fixing portion is a stud integrally formed in the distribution box base and extending upward, and the stud can pass through the mounting hole at one end of the busbar and be tightened by a nut.

[0012] According to the distribution box with the above structure, the stud as the first fixing part is integrally formed with the distribution box base. Fixing can be achieved by directly passing the mounting hole at one end of the busbar through the stud and tightening the nut. It has high stability and does not require additional bolts, making operation more convenient.

[0013] Preferably, in the above-mentioned distribution box, the current sensor accommodating cavity also includes a step portion arranged from the bottom wall, and the step portion includes: a vertical wall erected from the bottom wall along a first direction; and a horizontal wall extending from the vertical wall along a second direction to the third side wall, the horizontal wall, the bottom wall, the first side wall, the second side wall, the third side wall and the fourth side wall constitute a first accommodating cavity for accommodating at least one of the current sensors, and the vertical wall, the bottom wall, the first side wall, the second side wall and the fourth side wall constitute a second accommodating cavity for accommodating at least one of the current sensors.

[0014] According to the distribution box with the above structure, due to the provision of a step portion, the current sensor accommodating chamber is divided into two upper and lower spaces and two lateral spaces. It is possible to select an appropriate installation space according to the shape of the current sensor to be installed, reasonably and effectively utilize each space, and realize universal installation.

[0015] Preferably, in the above-mentioned distribution box, protruding positioning ribs are respectively provided on the inner wall surfaces of the first side wall and the second side wall of the current sensor accommodating cavity, and the positioning ribs extend in the up-down direction.

[0016] According to the distribution box with the above structure, since the positioning ribs are provided, when the current sensor is wrapped by the first side wall and the second side wall to apply a holding force to the current sensor and thus fix the current sensor, the squeezing force can be applied to the current sensor by the positioning ribs provided on the first side wall and the second side wall, so that the posture of the current sensor can be maintained more stably, making the installation more stable.

[0017] Preferably, in the above-mentioned distribution box, the distribution box base also includes a busbar positioning cavity, and the busbar positioning cavity has a wall body surrounding the second fixing part and the third fixing part on the outside of the second side wall of the current sensor accommodating cavity, so that when the other end of the busbar is fixed to the second fixing part or the third fixing part, the other end is received in the busbar positioning cavity and positioned.

[0018] According to the distribution box with the above structure, the other end of the busbar can be received in the busbar positioning cavity, so that the busbar positioning cavity can assist in positioning and guiding the busbar, reliably maintain the installation posture of the busbar, and further reliably maintain the installation posture of the current sensor fixed by the fixation of the busbar, thereby improving reliability.

[0019] Preferably, in the above-mentioned distribution box, the fourth side wall of the current sensor accommodating cavity has a concave cutout portion.

[0020] According to the distribution box with the above structure, by utilizing the recessed cut-out portion on the fourth side wall of the current sensor accommodating cavity, even for the current sensor that has a fixed point formed on the side but is not available, the fixed point will not become an interference because the fixed point can be accommodated by the cut-out portion, so that this type of current sensor can also be reliably accommodated and installed in the current sensor accommodating cavity, thereby improving installation versatility.

[0021] Preferably, in the above-mentioned distribution box, the current sensor includes at least the following three types: a first current sensor: its current sensor body is integrated with the bus bar, the current sensor body itself does not include a fixing point for fixing the first current sensor to the base of the distribution box, and a side surface of the current sensor body located on the side of the fourth side wall when in the installed state is provided with a first signal control interface extending in the height direction, and the opening of the first signal control interface faces upward for the wiring harness to be led out; a second current sensor: its current sensor body and the bus bar are constructed separately, the current sensor body has a through hole for the bus bar to pass through and has a bus bar fixing portion for fixing the bus bar, and the current sensor body itself does not include a fixing point for fixing the second current sensor to the base of the distribution box. The third current sensor comprises a first current sensor body and a second current sensor body, wherein the first current sensor body and the second current sensor body are separately constructed with a bus bar, the current sensor body has a through hole for the bus bar to pass through but does not have a bus bar fixing portion for fixing the bus bar, the current sensor body itself includes a fixing point designed to fix the third current sensor to the base of the distribution box, and the lower part of the side of the current sensor body located on the side of the third side wall in the installed state has an opening to form a third signal control interface, and the third signal control interface is used for the wiring harness to be led out. The fixing point of the third current sensor is a convex piece that extends outward from two side surfaces located on both sides of the third side wall and the fourth side wall in the installed state, and can be received in the cutout portion. The width of the third current sensor is greater than the width of the first current sensor and the width of the second current sensor, and matches the distance between the first side wall and the second side wall of the current sensor accommodating chamber. The dimension of the third current sensor in the installation direction, i.e., the height, is greater than the height of the first current sensor and is substantially equal to the height of the second current sensor.

[0022] According to the distribution box with the above structure, at least the above three current sensors can be installed interchangeably. In addition to matching different current detection requirements, it can also avoid replacing with other products when there is a shortage in the supply chain, ensuring the stable production of high-voltage distribution boxes and optimizing costs.

[0023] Preferably, in the above-mentioned distribution box, the length of the second current sensor is substantially equal to the length of the third current sensor, and they are accommodated in the second accommodating cavity in a state of being loaded on the bottom wall, and the first current sensor is accommodated in the first accommodating cavity in a state of being loaded on the horizontal wall.

[0024] According to the distribution box with the above structure, the various spaces of the current sensor accommodating cavity can be reasonably utilized according to the structural configuration of various types of sensors, and at least three different current sensors can be installed in the most compact space layout, and the installation space can be controlled within the range of about one current sensor, thereby realizing space saving and achieving miniaturization.

[0025] Preferably, the above-mentioned distribution box also includes an upper cover, which can be assembled with the distribution box base so as to cover the distribution box base from above, and the part of the upper cover corresponding to the current sensor accommodating cavity includes a first upper cover surface and a second upper cover surface protruding upward than the first upper cover surface, the first upper cover surface is used to abut against the top surface of the first current sensor when the first current sensor is accommodated in the current sensor accommodating cavity, and the second upper cover surface is used to abut against the top surface of the second current sensor or the third current sensor when the second current sensor or the third current sensor is accommodated in the current sensor accommodating cavity.

[0026] According to the distribution box with the above structure, the resin upper cover can be used to assist in holding and fixing various current sensors, further improving the installation reliability. Moreover, the upper cover is used as a holder for each current sensor, and no other holder is required, thereby saving parts, saving space and reducing costs.

[0027] Preferably, in the above-mentioned distribution box, the bottom wall of the current sensor accommodating cavity is located at a lower side relative to the base surface of the distribution box base, so that a bottom cavity is formed around the current sensor accommodating cavity below the base surface, and the bottom cavity includes a signal output port, and the wiring harness led out from the first signal control interface of the first current sensor can be guided to the bottom cavity and connected to the signal output port via the through hole set on the base surface; the wiring harness led out from the second signal control interface of the second current sensor can be guided to the bottom cavity and connected to the signal output port via the outlet port set at the position of the current sensor accommodating cavity corresponding to the second signal control interface, and the wiring harness led out from the third signal control interface of the third current sensor can be guided to the bottom cavity and connected to the signal output port via the outlet port set at the position of the current sensor accommodating cavity corresponding to the third signal control interface.

[0028] According to the distribution box with the above structure, each current sensor is provided with a signal control interface. When the replaceable installation of each current sensor is achieved, the output direction and wiring path of the signal interface of each current sensor can also achieve corresponding replaceability.

[0029] The main aspects of the power distribution box for a vehicle of the present invention have been introduced above. Below, it will be described in conjunction with the accompanying drawings to facilitate a clearer understanding of the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The accompanying drawings are used to better understand the present invention and do not constitute an improper limitation of the present invention.

[0031] Figure 1 is a schematic diagram of the appearance of a power distribution box for a vehicle according to an embodiment of the present invention;

[0032] Figure 2 is a schematic assembly diagram of a base for a power distribution box for a vehicle according to an embodiment of the present invention;

[0033] Figures 3A-3D is a schematic diagram of different current sensors to be installed in a power distribution box for a vehicle according to an embodiment of the present invention, wherein Figure 3A is a schematic diagram of a first current sensor, Figure 3B is a schematic diagram of the second current sensor, Figure 3C Schematic diagram of the second current sensor after being fixed to the bus bar, Figure 3D is a schematic diagram of a third current sensor;

[0034] Figures 4A-4C is a schematic diagram of the installation of the first current sensor, wherein Figure 4A This is a planar installation diagram. Figure 4B It is the aa section view. Figure 4C This is the bb cross-sectional view. Figure 4D This is the back installation diagram;

[0035] Figures 5A-5C is a schematic diagram of the installation of the second current sensor, where Figure 5A This is a planar installation diagram. Figure 5B yes Figure 5A A longitudinal cross-sectional view along the center of the sensor body Figure 5C is a transverse cross-sectional view, Figure 5D This is the back installation diagram;

[0036] Figures 6A-6C is a schematic diagram of the installation of the third current sensor, where Fig. 6A This is a planar installation diagram. Figure 6B is a transverse cross-sectional view. Figure 6C is a longitudinal cross-sectional view, Fig.6D This is the back installation diagram;

[0037] Figure 7 It is a schematic diagram of the one-piece molded terminal.

[0038] List of Reference Numerals

[0039] 10 Distribution Box

[0040] 100 Distribution box base, base

[0041] 110 Current sensor housing cavity

[0042] 111 outlet

[0043] 112 slots

[0044] 113 second accommodation chamber

[0045] 120 side wall

[0046] 121 first side wall

[0047] 122 second side wall

[0048] 123 Third side wall

[0049] 124 Fourth side wall

[0050] 125 cut

[0051] 130 bottom wall

[0052] 140 Steps

[0053] 141 vertical wall

[0054] 142 horizontal wall

[0055] 160 busbar positioning cavity

[0056] 161 positioning slot

[0057] 162 wall

[0058] 170 positioning ribs

[0059] 200 Upper cover

[0060] 201 First upper cover

[0061] 202 Second upper cover

[0062] 203 side positioning rib

[0063] 204 upper positioning rib

[0064] 101 Electrical Components

[0065] 300 Current Sensor

[0066] 300A First Current Sensor

[0067] 301A current sensor body

[0068] 302A top surface

[0069] 310A First signal control interface

[0070] FL current direction

[0071] 300B Second current sensor

[0072] 320B through hole

[0073] 330B bus bar fixing part

[0074] 310B Second signal control interface

[0075] 302B top surface

[0076] 300C Third Current Sensor

[0077] 310C third signal control interface

[0078] 320C through hole

[0079] 330C fixed point

[0080] WWidth

[0081] Height

[0082] 400 First Bus

[0083] 401, 402 mounting holes

[0084] 403 boss

[0085] 500 Second Bus

[0086] 501, 502 mounting holes

[0087] 503 fixing hole

[0088] 600 studs

[0089] 610, 620, 630 bolts

[0090] 700, 710 nuts

[0091] 50 signal output port

[0092] 22 confluence harness path

[0093] 23 branch wiring harness

[0094] 24 branch wiring harness routing

[0095] 25 branch wiring harness routing

[0096] 26 piercing

[0097] 27 branch wiring harness routing

[0098] 28 signal output ports DETAILED DESCRIPTION

[0099] Hereinafter, the technical solution of the present invention will be more clearly illustrated by describing specific embodiments of the present invention with reference to the accompanying drawings.

[0100] It should be noted that the drawings of the present invention are only schematic diagrams simply shown to clearly show the parts related to the scheme of the present invention, and some non-essential parts that may exist are not shown. Therefore, these drawings should not be understood as limitations on the present invention, and they may be different from the actual structure when used. In addition, it should also be understood that the terms "upper", "lower", "left", "right", "front", "back", etc. that may appear in the following description to indicate orientation or position are for the purpose of convenience of explanation and are not restrictive. Similarly, for the sake of clarity and conciseness, the description of well-known functions and structures is omitted in the following description. In addition, it should be noted that the terms "upper", "lower", "left", "right", "front", and "back" that appear in the description of the current sensor are all orientations of the current sensor under the installation posture.

[0101] Figure 1 1 is a schematic diagram of the appearance of a distribution box 10 for a vehicle (hereinafter also referred to as a distribution box) according to an embodiment of the present invention. Figure 2 1 is a schematic diagram of assembling a base 100 of a power distribution box 10 for a vehicle according to an embodiment of the present invention.

[0102] The distribution box 10 according to the present embodiment is applied to new energy vehicles, for example, for high voltage power distribution. The distribution box 10 may include a base 100 made of resin and an upper cover 200 made of resin, and the base 100 and the upper cover 200 may be assembled with each other. Figure 2 As shown, the base 100 is, for example, a rectangular block, on which several electrical components such as a current sensor 300, positive and negative relays, pre-charge relays, pre-charge resistors, etc., low-voltage signal harnesses and interfaces can be installed. The electrical components are connected by busbars such as copper bars, and their signal communication is connected by harnesses.

[0103] Unlike traditional distribution boxes that can only install one dedicated current sensor, the distribution box 10 according to the present embodiment can replaceably install at least two or more (three in the present embodiment) different current sensors to detect current, which greatly improves the versatility. In addition to matching different current detection requirements, it can also avoid replacing with other products when there is a shortage in the supply chain, ensuring stable production of high-voltage distribution boxes and optimizing costs. In addition, the distribution box 10 of the present embodiment can also effectively utilize the installation space of the high-voltage distribution box, and has a compact structure, avoiding the phenomenon of idle installation cavity structure when replacing different types of current sensors.

[0104] First, combine Figures 3A-3DThree different current sensors 300 to be installed in the distribution box 10 of this embodiment are introduced. The current sensors of this embodiment are all Hall current sensors. Figure 3A is a schematic diagram of a first current sensor 300A, Figure 3B is a schematic diagram of a second current sensor 300B, Figure 3C Schematic diagram of the second current sensor after being fixed to the bus bar, Figure 3D is a schematic diagram of a third current sensor 300C.

[0105] like Figures 3A-3D As shown, the three current sensors 300A-300C of this embodiment are all regular block-shaped, and each can be equipped with a bus bar for current to flow through, so that two ends of the bus bar extend from opposite sides of each current sensor body respectively.

[0106] Figure 3A The first current sensor 300A is, for example, an integrated structure of a straight-line bus bar, that is, the current sensor body and the straight-line bus bar 400 are integrally formed, and fixing holes for bolts 600, 610, etc. to pass through are formed at both ends of the bus bar 400, so that the first current sensor 300A can be fixed through the holes at both ends of the bus bar 400.

[0107] like Figure 3A As shown, for the first current sensor 300A, except for the mounting holes 410 at both ends of the bus bar 400, the current sensor body itself does not include other fixing points for fixing the first current sensor to the base 100. In other words, the first current sensor 300A is mainly installed and fixed to the base 100 by the integrated bus bar 400. Figure 4A The other end of the integrated busbar of the first current sensor 300A may have a boss 403 extending laterally from both sides of the busbar in the width direction, and the boss 403 may be used as a positioning portion to improve the positioning capability of the busbar, which will be described later. However, the boss is not restrictive and may not be provided.

[0108] The current sensor body of the first current sensor 300A is shown in the figure, and the lower part is a right-angle block shape and the upper part is an arc-shaped block shape. Figure 3AA first signal control interface 310A extending in the height direction is protrudingly provided on the right side of the base 100 for wiring the signal line. When the first current sensor 300A is accommodated in the current sensor accommodating cavity 110 of the base 100, the first signal control interface is located on the fourth side wall 114 side of the current sensor accommodating cavity 110 of the base 100 (to be described later) and opens upward for leading out the signal line.

[0109] Figure 3B The second current sensor 300B shown is different from the first current sensor 300A in that it does not have a bus bar integrally provided therein, but the current sensor body and the bus bar are constructed separately. The current sensor body is formed with a through hole 320B, and the bus bar 500 can pass through the through hole. The bus bar 500 can be, for example, L-shaped, and the two ends can be respectively provided with fixing holes for the bolts 600 and 620 to pass through. The current sensor body of the second current sensor 300B has a bus bar fixing portion 330B for fixing the bus bar. As shown in the figure, the bus bar fixing portion 330B, for example, extends from the lower edge of the through hole 320B, forming a placement surface for the bus bar 500. The bus bar fixing portion 330B, for example, has a fixing hole, and the bus bar 500 can also be provided with a fixing hole 503 at a corresponding position (see Fig. 6A ), so that when the bus bar 500 passes through the through hole 320B of the second current sensor 300B and is placed and supported on the bus bar fixing portion 330B, the current sensor body of the second current sensor 300B is integrally connected with the bus bar 500 by passing the bolts from below through the fixing holes of the bus bar fixing portion 330B and the fixing holes 503 of the bus bar 500 and tightening the nuts, as shown in FIG. Figure 3C As shown. At this time, similar to the case of the first current sensor 300A, the second current sensor 300B can be installed and fixed to the base 100 by means of the fixing holes at both ends of the bus bar 500 (for example, the L-shaped bus bar in the figure) pre-connected with the second current sensor 300B. The current sensor body of the second current sensor 300B itself does not include a fixing point for fixing the second current sensor to the base 100. In other words, the second current sensor 300A is mainly installed and fixed to the base 100 by the bus bar 500 installed later.

[0110] As shown in the figure, the current sensor body of the second current sensor 300B is, for example, a right-angle block shape at the bottom and an arc-shaped block shape at the top. A side surface of the current sensor body of the second current sensor 300B penetrated by the through hole 320B is provided with a second signal control interface 310B protrudingly at a lower position along the extension direction of the bus bar. When the second current sensor 300B is accommodated in the current sensor accommodating cavity 110 of the base 100, the second signal control interface 310B is, for example, close to the bottom wall 130 side and the third side wall 123 side of the current sensor accommodating cavity 110 described later and has an end opening for the lead-out of the signal line (to be described later).

[0111] Figure 3D The third current sensor 300C shown has an outer contour substantially the same as that of the second current sensor 300B, and is also similar to the second current sensor 300B in that the current sensor body itself is not integrally provided with a bus bar, but rather the current sensor body and the bus bar 500 (which may share a bus bar with the second current sensor 300B) are constructed separately. However, unlike the second current sensor 300B, the current sensor body of the third current sensor 300C does not have a bus bar fixing portion for fixing the bus bar such as the bus bar fixing portion 330B of the second current sensor 300B. Therefore, for the third current sensor 300C, since the third current sensor body cannot be integrally connected to the bus bar when installed in the distribution box, even if the bus bar has been connected and fixed to the base of the distribution box, it is difficult to correspondingly maintain the third current sensor 300C only via the bus bar. In view of this situation, as Figure 3D As described above, this type of third current sensor 300C includes a fixing point 330C for fixing the current sensor body of the third current sensor 300C to the base 100 of the distribution box 10 during design. Therefore, the original intention of the design is that when the third current sensor 300C is installed on the base 100 of the distribution box 10, by fixing such a fixing point 330C to the base, the current sensor body of the third current sensor 300C can also be reliably fixed to the base 100. Figure 3D As shown, in this embodiment, the fixing point 330C of the third current sensor 300C is, for example, two side surfaces in the length direction of the third current sensor body, that is, two side surfaces not penetrated by the through hole ( Figure 3D A convex piece protrudes outward from the center of the approximately height direction of the left and right side surfaces in the middle, and a through hole portion is formed in each convex piece, through which a bolt or the like can pass to achieve connection and fixation.

[0112] like Figure 3DAs shown, the current sensor body of the third current sensor 300C is, for example, in the shape of a right-angle block at the bottom and in the shape of an arc block at the top, which is basically consistent with the outer contour of the current sensor body of the second current sensor 300B. The third current sensor 300C has an opening below one side surface in the length direction of the current sensor body, that is, one side surface not penetrated by the through hole, so that the opening forms a third signal control interface 310C. When the third current sensor 300C is accommodated in the current sensor accommodating cavity of the base 100, the third signal control interface 310C can be used for signal line extraction (to be described later).

[0113] For the above three current sensors 300, namely the first current sensor 300A, the second current sensor 300B and the third current sensor 300C, the length, height and width can have the following settings: the height of the second current sensor 300B is substantially equal to the height of the third current sensor 300C, and both are greater than the height of the first current sensor 300A; the width of the third current sensor 300C is greater than the width of the first current sensor 300A and also greater than the width of the second current sensor 300B; the length of the third current sensor 300C is substantially equal to the length of the second current sensor 300B, and both are less than the length of the first current sensor 300A.

[0114] The above describes three examples of current sensors that can be installed interchangeably in the distribution box 10 of the embodiment of the present invention. The following describes in detail the base 100 for installing the current sensors in the distribution box 10 and the installation method of each current sensor.

[0115] The base 100 of the distribution box 10 is made of resin. Figure 1 and 2 As shown, it has a generally rectangular outline formed by a generally rectangular peripheral wall. The upper surface of the base 100 is a base surface for mounting various electrical components thereon. A space surrounded by a rectangular peripheral wall can be formed below the base surface as a reverse space or back space.

[0116] like Figure 4AAs shown in Figures 1 and 2, the base 100 made of resin of the distribution box 10 includes a current sensor accommodating chamber 110 for accommodating each current sensor 300. The current sensor accommodating chamber 110 includes a bottom wall 130 at the lower end and a circumferential side wall 120, and the side wall 120 includes a first side wall 121 and a second side wall 122 opposite to each other in a first direction (corresponding to the width direction of the current sensor and the extension direction of the bus bar) and a third side wall 123 and a fourth side wall 124 opposite to each other in a second direction (corresponding to the length direction of the current sensor) intersecting the first direction (vertical in this embodiment) so as to surround the current sensor in the circumferential direction. In this embodiment, since the lower part of each current sensor 300 (the part received by the current sensor accommodating chamber) is a right-angle block, accordingly, the current sensor accommodating chamber 110 is also roughly formed into a rectangular box shape.

[0117] The bottom wall 130 of the current sensor accommodating chamber 110 is located at a lower side relative to the base surface of the base 100, so that a bottom cavity (reverse cavity, back cavity) is formed around the current sensor accommodating chamber 110 below the base surface, which can be used for laying the wiring harnesses led out from each current sensor 300. The bottom cavity includes a signal output port 28, and the wiring harnesses led out from the signal control interface of each current sensor 300 can be laid to the signal output port 28.

[0118] In order to interchangeably accommodate different current sensors 300, namely the first current sensor 300A, the second current sensor 300B and the third current sensor 300C, the length of the current sensor accommodating cavity 110, namely the distance between the third side wall 123 and the fourth side wall 124, is designed to be greater than the length of the first current sensor 300A with the longest length; the width, namely the distance between the first side wall 121 and the second side wall 122, is designed to match the width of the third current sensor 300C with the widest width; and the height is preferably designed to be lower than the height of the second current sensor 300B or the third current sensor 300C with the highest height, so that when each current sensor is installed in the current sensor accommodating cavity, each current sensor can be exposed in the height direction, of course, this is not restrictive.

[0119] The first side wall 121 and the second side wall 122 of the current sensor accommodating chamber 110 are both formed with recessed cutouts, so that the busbars extending from the current sensor body of each current sensor can extend to the outside of the current sensor accommodating chamber 110 through the cutouts and be fixed to the corresponding fixing portions provided on the base surface of the base 100. The fourth side wall 114 of the current sensor accommodating chamber 110 is also formed with recessed cutouts 125, so that when the third current sensor 300C having the fixing point 330C is to be installed in the current sensor accommodating chamber 110, the fixing point 330C provided on the side of the third current sensor 300C can be accommodated in the cutouts 125 without interference.

[0120] In this embodiment, on the base surface of the base 100, three fixing parts are arranged outside the first side wall 121 and the second side wall 122 of the current sensor accommodating cavity 110, all of which are used to fix the two ends of the busbars 400 and 500 extending from the opposite sides of the current sensor body of the current sensor. In order to realize the interchangeability of the current sensor in a small space, the first fixing part of the three fixing parts is used as a common fixing part (corresponding to Figure 4A The first fixing portion is arranged close to the first side wall 121; the second fixing portion (corresponding to Figure 4A The position of the reference numeral 610) and the third fixing portion (corresponding to Figure 5A The position of the second fixing portion (marked with reference numeral 620) is used as an optional fixing portion, and the second fixing portion and the third fixing portion are arranged near the second side wall 122 and are staggered from each other in the first direction. When each current sensor 300 is installed, one end of the busbars 400 and 500 used by each current sensor is fixed to the first fixing portion as a common fixing portion, and the other end of the busbars can be selectively fixed to the second fixing portion or the third fixing portion according to the situation. In this embodiment, as Figure 7 As shown, the first fixing portion used as the common fixing portion can be a terminal such as a stud integrally formed with the base 100. Of course, it can be understood by those skilled in the art that the first fixing portion can also be other structures, such as a through hole provided on the base surface, which is fixed by passing a bolt through the through hole and the mounting hole at one end of the busbar and tightening the bolt; or a convex portion, which is fixed by passing the convex portion through the mounting hole at one end of the busbar and welding therein; or a snap portion, etc. In the present embodiment, the second fixing portion 142 and the third fixing portion 143 are, for example, through holes provided on the base surface, etc. However, like the first fixing portion, this setting is only an example and not restrictive, and can also be set as the first fixing portion.

[0121] In the distribution box 10 of the present embodiment, the current sensor accommodating cavity 110 of the base 100 also includes a step portion 140 set from the bottom wall 130, and the step portion 140 includes: a vertical wall 141 erected from the bottom wall 130 along a first direction; and a horizontal wall 142 extending from the vertical wall 141 along a second direction to the third side wall 123, the horizontal wall 142, the bottom wall 130, the first side wall 121, the second side wall 122, the third side wall 123 and the fourth side wall 124 constitute a first accommodating cavity for accommodating at least one current sensor, which is the first current sensor 300A in the present embodiment; the vertical wall 141, the bottom wall 130, the first side wall 121, the second side wall 122 and the fourth side wall 124 constitute a second accommodating cavity 113 for accommodating at least one of the current sensors, which is the second current sensor 300B and the third current sensor 300C in the present embodiment. Due to the step portion 140, the current sensor accommodating chamber is divided into two upper and lower spaces and two lateral spaces, so that appropriate installation space can be selected according to the shape of the current sensor to be installed, and each space can be reasonably and effectively used to achieve universal installation.

[0122] In the distribution box 10 of the present embodiment, the inner wall surfaces of the first side wall 121 and the second side wall 122 of the current sensor accommodating cavity 110 of the base 100 may be respectively provided with protruding positioning ribs 170, and the positioning ribs extend in the up-down direction. The number of positioning ribs is preferably two or more and they are evenly arranged, and the shape may be rib-shaped, and the upper end may have a downwardly inclined guide surface to facilitate the insertion of the current sensor. Since the positioning ribs are provided, when the current sensor is wrapped by means of the first side wall 121 and the second side wall 122 to apply a holding force to the current sensor and thus fix the current sensor, the current sensor can be pressed by the positioning ribs provided on the first side wall and the second side wall, and the posture of the current sensor can be more stably maintained, making the installation more stable.

[0123] In addition, as shown in the figure, in the distribution box 10 of the present embodiment, the base 100 may further include a busbar positioning cavity 160, the busbar positioning cavity 160 having a wall body 162 surrounding the second fixing portion and the third fixing portion on the outer side of the second side wall 122 of the current sensor accommodating cavity, so that when the other end of the busbar is fixed to the second fixing portion or the third fixing portion, the other end of the busbar is received in the busbar positioning cavity 160. In the present embodiment, since the integrated busbar 400 of the first current sensor 300A has a boss 403, the busbar positioning cavity 160 also has a positioning groove 161 extending outward laterally, and the boss 403 can be positioned in the positioning groove 161. There is no specific limitation on the shape of the busbar positioning cavity 160, and it can be set accordingly according to the shape of the busbar used, as long as the positioning of the busbar can be achieved. By utilizing the busbar positioning cavity, the other end of the busbar can be received in the busbar positioning cavity, so that the busbar can be positioned and guided by the busbar positioning cavity, the installation posture of the busbar can be reliably maintained, and then the installation posture of the current sensor fixed by the fixation of the busbar can be reliably maintained, thereby improving reliability.

[0124] Moreover, according to the distribution box 10 of this example, Figure 1 As shown, the upper cover 200 can be assembled with the base 100, so as to cover the base 100 from above. The portion of the upper cover 200 corresponding to the current sensor accommodating cavity 110 includes a first upper cover surface 201 and a second upper cover surface 202 protruding upwards more than the first upper cover surface 201, as shown in FIG. Figure 4C , 6C As shown, the second upper cover surface 202 protrudes upward and can be configured to have side positioning ribs 203 and upper positioning ribs 204. The first upper cover surface and the second upper cover surface of the upper cover 200 can also serve as positioning components for applying a holding force to the installed current sensor from above.

[0125] The following will refer to Figures 4A-4C Describe the installation of the first current sensor 300A, wherein Figure 4A This is a planar installation diagram. Figure 4B It is the aa section view. Figure 4C This is the bb cross-sectional view. Figure 4D This is the rear installation diagram.

[0126] As shown in the figure, the first current sensor 300A has a straight-line integrated busbar 400, and mounting holes 401 and 402 are respectively provided at both ends of the busbar 400. After ensuring that the detection current flows to FL correctly, one of the mounting holes 401 of the busbar 400 is passed through the first fixing part, i.e., the stud, which serves as a common fixing part, and the boss 403 at the other end of the busbar 400 is placed in the positioning groove 161 of the busbar positioning cavity 460, and the mounting hole 402 at the other end coincides with the through hole of the base which serves as the second fixing part, and the end of the other end of the busbar 400 is adjacent to the wall 162 of the busbar positioning cavity 160. At this time, at the stud 600 of the common fixing part, the stud 600 is tightened with a nut 700, and at the second fixing part, a bolt 610 is inserted from the top to sequentially penetrate the mounting hole 402 of the busbar 400 and the through hole of the base and then tightened with the nut 710, thereby achieving the fixation of the first current sensor 300A. At this time, around the first current sensor 300A, the wall 162 of the busbar positioning cavity 160, the positioning groove 161, the third side wall 123 of the current sensor accommodating cavity 110 and the horizontal wall 142 of the step portion 140 form a part of the boundary for positioning the first current sensor 300A. In addition, referring to the cross-sectional view, the first current sensor A is placed on the horizontal wall 142 of the step portion and is accommodated in the first accommodating cavity, so that it is at the middle height of the current sensor accommodating cavity 110; space is reserved at the lower right for arranging another two current sensors, namely the second current sensor 300B and the third current sensor 300C, forming a second accommodating cavity, and a wire groove 112 is reserved at the lower left for the wiring of another two current sensors, namely the second current sensor 300B and the third current sensor 300C.

[0127] Therefore, by using the current sensor accommodating cavity 110 of the base 100 of the distribution box 10 of this embodiment, the first current sensor 300A can be reliably installed, fixed and positioned.

[0128] In addition, when the upper cover 200 is assembled to the base 100, Figure 4C As shown, the first upper cover surface 201 of the upper cover 200 abuts against the top surface 302A of the current sensor body 301A of the first current sensor 300A, exerting a retaining force downward, thereby further reliably retaining the first current sensor 300A in the up and down directions, and cooperating with the first fixing portion and the second fixing portion in Figure 3 to more stably position the first current sensor 300A in a reasonable space of the current sensor accommodating cavity 110, further improving the installation reliability.

[0129] The following will refer to Figures 5A-5C Describe the installation of the second current sensor 300B, wherein Figure 5A This is a planar installation diagram. Figure 5B , Figure 5C is a cross-sectional view, Figure 5D This is the rear installation diagram.

[0130] As mentioned above, the second current sensor 300B itself does not have an integrated busbar and no fixing point, but has a busbar fixing portion 330B. Based on this situation, before installing the second current sensor 300B, it is necessary to first confirm that its current direction FL is consistent with that of the previous current sensor (the detection current directions of the three current sensors are consistent), and then install the external busbar 500 into the Figure 3B The second current sensor 300B is inserted into the through hole 320B in the middle of the busbar fixing portion 330B, and then fixed by the busbar fixing portion 330B. The state of the busbar 500 after installation is referred to as Figure 3C In the present embodiment, for miniaturization, the bus bar 500 is in an L shape as shown in the figure, and has mounting holes 501 and 502 at both ends.

[0131] After the second current sensor 300B is assembled with the bus bar 500, the combination is mounted as a sub-assembly to the Figure 5A The busbar 500 is placed in the second accommodating cavity of the current sensor accommodating cavity 110 and placed on the bottom surface 130 of the current sensor accommodating cavity 110. The mounting hole 501 at one end of the busbar 500 is passed through the stud 600 of the first fixing part as the common fixing part and tightened with a nut 700. The mounting hole 502 at the other end of the busbar 500 coincides with the through hole on the base surface as the third fixing part. The bolt 630 is inserted from above and the nut is tightened. Thus, the busbar 500 is firmly installed and fixed, thereby realizing the fixation of the second current sensor 300B. At this time, the wall body 162 of the busbar positioning cavity 160, the bottom wall 130 of the current sensor accommodating cavity 110 and the fourth side 124 wall form a part of the boundary for positioning the second current sensor 300B around the current sensor 300B, and a surrounding structure is formed for the second current sensor 300B, effectively and repeatedly utilizing the space to achieve a small and compact layout.

[0132] In addition, when the upper cover 200 is assembled to the base 100, Figure 5C As shown, the upper positioning rib 204 (see Figure 6C ) against the top surface 302B of the current sensor body of the second current sensor 300B, exerting a holding force downward, and the side positioning rib 203 (see Figure 6C) clamps the two sides of the top of the current sensor body from the side, thereby applying a retaining force from the side, so that the upper cover 200 can further reliably retain the second current sensor 300B in the up and down directions and in the lateral direction, and cooperates with the first fixing part and the third fixing part in Figure 3 to more stably position the second current sensor 300B in a reasonable space of the current sensor accommodating cavity, further improving the installation reliability.

[0133] The following will refer to Figures 6A-6C Describes the installation of the third current sensor 300C, wherein Fig. 6A This is a planar installation diagram. Figure 6B , Figure 6C is a cross-sectional view, Fig.6D This is the rear installation diagram.

[0134] The third current sensor 300C itself has a fixing point 330C, i.e., a convex piece, but it cannot be used in the distribution box of the embodiment, and the third current sensor 300C cannot be installed on the base 100 using the fixing point provided by the third current sensor 300C. In addition, the third current sensor itself does not have an integrated bus bar and a bus bar fixing point. Based on this situation, before installing the third current sensor 300C, it is also necessary to first confirm that the current direction FL is consistent with the previous current sensor, and then install the external bus bar 500 into the base 100. Figure 3D The third current sensor 300C is inserted into the second accommodating cavity 110 of the current sensor accommodating cavity 110 of the base 100, and then placed on the bottom wall 130. In this embodiment, the third current sensor 300C can use the same bus bar 500 as the second current sensor. At this time, as in the case of the second current sensor 300B, the mounting holes 501 and 502 at both ends of the bus bar 500 are mounted on the first fixing portion and the third fixing portion and bolts and nuts are tightened.

[0135] For the third current sensor 300C, although it has a protruding piece 330C, the protruding piece does not have a matching fixed target. For example, in this embodiment, one protruding piece is located in the space of the current sensor housing cavity 110, and the other protruding piece is received in the cutout 125 of the fourth side wall 124, and therefore cannot be used. In view of this situation, the dimension of the current sensor housing cavity in the first direction, i.e., the distance between the first side wall 121 and the second side wall 122 of the present embodiment, matches the width of the third current sensor 300C, so that the current sensor body of the third current sensor 300C is sandwiched between the first side wall 121 and the second side wall 122 of the current sensor housing cavity 110 in the first direction, and the positioning of the third current sensor 300C in the first direction is achieved by the clamping of the first side wall and the second side wall. Therefore, the third current sensor 300C is reliably installed and fixed as a whole through the first side wall and the second side wall of the current sensor housing cavity and the bus bar. More preferably, in this embodiment, positioning ribs 170 are further provided on the first side wall and the second side wall, respectively, so as to provide a holding force for the third current sensor 300C more reliably.

[0136] In this embodiment, when the third current sensor 300C is installed and fixed, the third current sensor 300C is surrounded by the wall 162 of the bus bar positioning cavity 160, the vertical wall 141 of the step portion 140 of the current sensor accommodating cavity 110, the bottom wall 130 and the fourth side wall 124, forming a part of the boundary for positioning the third current sensor 300C, and the layout space is reused to achieve a small and compact layout.

[0137] In addition, similarly to the second current sensor 300B, when the upper cover 200 is assembled to the base 100, as shown in FIG. Figure 6C As shown, the upper positioning rib 204 of the second upper cover surface 202 of the upper cover 200 abuts against the top surface of the current sensor body of the third current sensor 300C, applying a holding force downward, and the side positioning rib 203 clamps the two sides of the top of the current sensor body from the side, thereby applying a holding force from the side, so that the upper cover 200 can further reliably hold the third current sensor 300C in the up and down directions and in the lateral direction, and cooperates with the first fixing part and the third fixing part to more stably position the third current sensor 300C in a reasonable space of the current sensor accommodating cavity, thereby further improving the installation reliability.

[0138] As mentioned above, according to the distribution box of this embodiment, at least the above three current sensors can be installed interchangeably. In addition to matching different current detection requirements, it can also avoid replacing with other products when there is a shortage in the supply chain, ensuring stable production of high-voltage distribution boxes and optimizing costs. In addition, according to the structural configuration of various types of sensors, the various spaces of the current sensor accommodating cavity can be reasonably utilized, and at least three different current sensors can be installed in the most compact space layout, and the installation space can be controlled within the range of about 1 current sensor, realizing space saving and achieving small and compact size.

[0139] In addition, as described above, each current sensor 300 is provided with a signal control interface, that is, the first current sensor 300A is provided with a first signal control interface 310A, the second current sensor 300B is provided with a second signal control interface 310B, and the third current sensor 300C is provided with a third signal control interface 310C. In order to achieve the interchangeability between each current sensor 300A, 300B, and 300C, the signal interface outlet direction and wiring path should also have corresponding interchangeability. Based on this, consider aligning the through holes (center circular holes) of the second current sensor 300B and the third current sensor 300C, which have similar appearances, with the arc shape facing upward in the same direction and the square right-angle parts facing downward in the same direction. At this time, the outlet interfaces of the two current sensors are both located at Figure 5D , Fig.6D The bottom cavity (back cavity, reverse cavity) of the base 100 is opened at the corresponding position of the signal interface of the bottom cavity to form an outlet 111, and is designed with branch harness paths 23, 24 and a converging harness path 22. The harnesses are merged from the branch harness paths 23, 24 to the converging harness path 22, and then connected to the signal output port 28, so as to realize the interchange of the signal harnesses of the current sensors 300B and 300C. In addition, the first current sensor 300A in FIG4 has its signal outlet facing upward and is located in the sensor accommodating cavity. In order to realize the interchange of harnesses, the harness path needs to merge with the other two current sensors 300B and 300C, and the output line from the first signal control interface passes through the branch harness path 25, passes through the through hole 26 to Figure 4D The bottom cavity (back cavity, reverse cavity) of the current sensor 300A is connected to the signal output port 28 after merging into the converging wiring harness path 22 along the branch wiring harness path 27. Therefore, when the three current sensors 300A to 300C are interchangeable, their signal wiring harnesses can also be interchanged.

[0140] In addition, in this embodiment, the busbar 400 is straight and the busbar 500 is L-shaped, but this is not restrictive, and a busbar of corresponding shape can be selected according to actual conditions. However, from the perspective of miniaturization and high space utilization, the situation in this embodiment is preferred.

[0141] In addition, in the present embodiment, the fixing parts for fixing the busbar include three common fixing parts, but this is not restrictive. For example, four fixing parts may be provided in a one-to-one correspondence, or more than three optional fixing parts may be provided, etc. However, in view of miniaturization and high space utilization, the present embodiment is preferred.

[0142] In addition, in this embodiment, different current sensors are used in Example 3, however, other types of applicable current sensors can also be installed.

[0143] In addition, in this embodiment, the first direction and the second direction are perpendicular to each other, but this is not restrictive, and they may also be intersecting with each other other than perpendicular to each other. However, from the perspective of miniaturization and high space utilization, the situation in this embodiment is preferred.

[0144] In addition, in this embodiment, the first fixing portion is arranged outside the first side wall, and the second and third fixing portions are arranged outside the second side wall, but this is not restrictive, and the fixing portions can be arranged outside other side walls according to the shape of the bus bar. However, from the perspective of miniaturization and high space utilization, the situation of this embodiment is preferred.

[0145] The bus bars carried by the three different types of current sensors of the present invention share one of the fixed points and the wiring path of their signal output lines, make full use of the appearance characteristics of each current sensor, and overlap the non-essential positioning areas of the current sensor body partially or completely in space, thereby forming a compact installation cavity, thereby realizing the interchangeable structure of the three current sensors.

[0146] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A distribution box for a vehicle, wherein at least two different current sensors can be installed interchangeably in the distribution box to detect current, and the distribution box comprises: A distribution box base made of resin, the distribution box base includes a current sensor accommodating cavity for accommodating the current sensor, the current sensor accommodating cavity includes a bottom wall at the lower end and a circumferential side wall, the side wall includes a first side wall and a second side wall opposite to each other in a first direction and a third side wall and a fourth side wall opposite to each other in a second direction intersecting the first direction so as to be able to surround the current sensor in the circumferential direction, Each of the current sensors can be equipped with a bus bar through which current flows, so that two ends of the bus bar extend outward from the current sensor respectively, and when the current sensor is installed in the current sensor receiving cavity, the extending direction of the bus bar is consistent with the first direction. Wherein, on the distribution box base, at the position outside the side wall of the current sensor accommodating cavity, there are two or more fixing parts for fixing the two ends of the bus bar extending outward from the current sensor, and Among them, when the size of each current sensor in the first direction when in the installed state is regarded as the width of the current sensor, the width of at least one type of current sensor is different from the width of other types of current sensors, and the current sensor accommodating cavity is configured to: make the distance between the first side wall and the second side wall match the current sensor with the largest width among the different current sensors.

2. The distribution box according to claim 1, wherein: The fixing part includes: a first fixing part used as a common fixing part, the first fixing part is arranged close to the first side wall; and a second fixing part and a third fixing part used as optional fixing parts, the second fixing part and the third fixing part are arranged close to the second side wall and are staggered with each other in the first direction, and The first fixing portion is configured to fix one of both ends of the bus bar, and the second fixing portion and the third fixing portion are configured so that one of them is selected to fix the other of the both ends of the bus bar.

3. The distribution box according to claim 2, wherein: At least the first fixing portion is a stud integrally formed in the distribution box base and extending upward, and the stud can pass through the mounting hole at one end of the busbar and be tightened by a nut.

4. The distribution box according to any one of claims 1 to 3, wherein: The current sensor accommodating chamber further includes a step portion provided from the bottom wall, The step portion includes: a vertical wall erected from the bottom wall along a first direction; and a horizontal wall extending from the vertical wall to the third side wall along a second direction, The horizontal wall, the bottom wall, the first side wall, the second side wall, the third side wall and the fourth side wall constitute a first accommodating cavity for accommodating a sensor body of at least one current sensor. The vertical wall, the bottom wall, the first side wall, the second side wall and the fourth side wall constitute a second accommodating cavity for accommodating a sensor body of at least another type of the current sensor.

5. The distribution box according to claim 4, wherein: Protruding positioning ribs are respectively provided on the inner wall surfaces of the first side wall and the second side wall of the current sensor accommodating cavity, and the positioning ribs extend in the up-down direction.

6. The distribution box according to claim 5, wherein: The distribution box base also includes a busbar positioning cavity, which has a wall body surrounding the second fixing part and the third fixing part on the outside of the second side wall of the current sensor accommodating cavity, so that when the other end of the busbar is fixed to the second fixing part or the third fixing part, the other end is received in the busbar positioning cavity and positioned.

7. The distribution box according to claim 6, wherein: The fourth side wall of the current sensor accommodating chamber has a recessed cutout portion.

8. The distribution box according to claim 7, further comprising the current sensor, wherein: The current sensors include at least the following three types: The first current sensor: the current sensor body is integrated with the bus bar, the current sensor body itself does not include a fixing point for fixing the first current sensor to the base of the distribution box, and a side surface of the current sensor body located on the side of the fourth side wall in the installed state is provided with a first signal control interface extending in the height direction, and the opening of the first signal control interface faces upward for the wiring harness to be led out; The second current sensor: the current sensor body and the bus bar are structured separately, the current sensor body has a through hole for the bus bar to pass through and has a bus bar fixing portion for fixing the bus bar, the current sensor body itself does not include a fixing point for fixing the second current sensor to the distribution box base, and the lower part of a side surface of the current sensor body located on the side of the first side wall when in the installed state is provided with a second signal control interface extending along the first direction, and the end of the second signal control interface is open for the wiring harness to be led out; as well as The third current sensor: the current sensor body and the bus bar are structured separately, the current sensor body has a through hole for the bus bar to pass through but does not have a bus bar fixing portion for fixing the bus bar, the current sensor body itself includes a fixing point designed to fix the third current sensor to the base of the distribution box, and the lower part of a side surface of the current sensor body located on the side of the third side wall when in the installed state has an opening to form a third signal control interface, and the third signal control interface is used for the wiring harness to be led out; The fixing point of the third current sensor is a protruding piece that extends outward from two side surfaces located on both sides of the third side wall and the fourth side wall in the installed state, and can be received in the cutout portion. The width of the third current sensor is greater than the width of the first current sensor and the width of the second current sensor, and matches the distance between the first side wall and the second side wall of the current sensor accommodating cavity. The dimension of the third current sensor in the installation direction, ie, the height, is greater than the height of the first current sensor and is substantially equal to the height of the second current sensor.

9. The distribution box according to claim 8, wherein: The second current sensor has a substantially equal length to the third current sensor, and is accommodated in the second accommodation cavity in a state of being placed on the bottom wall. The first current sensor is accommodated in the first accommodation chamber in a state of being placed on the horizontal wall.

10. The distribution box according to claim 9, further comprising an upper cover, which can be assembled with the distribution box base to cover the distribution box base from above, The portion of the upper cover corresponding to the current sensor accommodating cavity includes a first upper cover surface and a second upper cover surface protruding further upward than the first upper cover surface, the first upper cover surface being used to abut against the top surface of the first current sensor when the first current sensor is accommodated in the current sensor accommodating cavity, and the second upper cover surface being used to abut against the top surface of the second current sensor or the third current sensor when the second current sensor or the third current sensor is accommodated in the current sensor accommodating cavity.

11. The distribution box according to claim 10, wherein: The bottom wall of the current sensor accommodating cavity is located at a lower side relative to the base surface of the distribution box base, so that a bottom cavity is formed around the current sensor accommodating cavity below the base surface, and the bottom cavity includes a signal output port. The wiring harness led out from the first signal control interface of the first current sensor can be guided to the bottom cavity through the through hole arranged on the base surface and connected to the signal output port; The wiring harness led out from the second signal control interface of the second current sensor can be guided to the bottom cavity and connected to the signal output port via the wire outlet provided at a position of the current sensor accommodating cavity corresponding to the second signal control interface. The wiring harness led out from the third signal control interface of the third current sensor can be guided to the bottom cavity and connected to the signal output port via a wire outlet provided at a position of the current sensor accommodating cavity corresponding to the third signal control interface.

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