A power distribution assembly, a power distribution unit, a charging device

Abstract

This invention provides a power distribution assembly, a power distribution unit, and a charging device. The power distribution assembly includes: a circuit board extending along a second direction and a third direction perpendicular to each other; a plurality of onboard relays arranged on the circuit board at predetermined intervals along the second direction; and a plurality of latching terminal groups, each latching terminal group including two latching terminals correspondingly connected to an onboard relay and fixed to the circuit board along the third direction. The circuit board includes a plurality of slot groups, each slot group located between two adjacent latching terminal groups along the second direction; each slot group includes two slots located on one edge of the circuit board along the third direction and extending inward along the third direction, the two slots being spaced apart by a predetermined distance in the second direction to offset each other in the third direction. This power distribution assembly can improve the situation of circuit board twisting and deforming due to bearing the weight of copper busbars in the prior art, and has a better load-bearing capacity.

Description

Technical Field

[0001] This invention relates to the field of power distribution technology, and specifically to a power distribution component, a power distribution unit, and a charging device. Background Technology

[0002] With the rapid development of the electric vehicle industry, the market demand for high-power DC charging piles is increasing. To improve the utilization rate of charging modules, modern charging piles typically employ dynamic power allocation technology, also known as flexible allocation or matrix switching. This technology flexibly allocates the power of the charging module to different charging guns based on the real-time charging needs of different vehicles. In existing technical solutions, this power matrix switching mainly relies on traditional high-voltage DC contactors, which are typically large cylindrical contactors. In a typical charging system with multiple outputs, a large number of onboard relays or contactors are often required to enable the switching function of any charging module to any charging gun. For example, in certain 12-gun full matrix topologies, up to 130 or more switching devices may be needed. Due to the large size and large number of contactors, this power distribution unit is bulky, costly, and difficult to maintain.

[0003] To address this, the applicant proposes a novel power distribution unit comprising distribution components, busbar components, and an outer frame. The distribution components include circuit boards and relays, and are distributed vertically. The busbar components connect relays across the distribution components and connect relays within the distribution components. The circuit board extends horizontally, with both ends fixed to the outer frame. The busbar components utilize heavy copper busbars, and the circuit boards, designed to accommodate a sufficient number of relays, are typically narrow and long. These elongated boards are prone to deformation under the weight of the copper busbars, resulting in constant stress and a high risk of breakage due to stress concentration during equipment vibration. Furthermore, a single circuit board requires multi-point fastening with multiple vertically extending and one horizontally extending copper busbars. Due to manufacturing tolerances in the circuit board, copper busbars, and outer frame, these tolerances accumulate over long spans. When multiple fastening points are rigidly connected simultaneously, misalignment of mounting holes often occurs. Forced fastening can easily lead to severe twisting and deformation of the circuit board. Summary of the Invention

[0004] The purpose of this invention is to overcome the above-mentioned defects or problems in the prior art and to provide a power distribution component, a power distribution unit, and a charging device. This power distribution component can improve the situation in the prior art where the circuit board is twisted and deformed due to the weight of the copper busbar.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] Technical Solution 1: A power distribution component, comprising: a circuit board extending along a mutually perpendicular second direction and a third direction; a plurality of onboard relays disposed on the circuit board at predetermined intervals along the second direction; and a plurality of latching terminal groups, each of the latching terminal groups comprising two latching terminals correspondingly connected to one of the onboard relays and fixed to the circuit board along the third direction; wherein, the circuit board comprises a plurality of slot groups, each of the slot groups being located between two adjacent latching terminal groups along the second direction; each of the slot groups comprising two slots respectively located on one side edge of the circuit board along the third direction and extending inward along the third direction, the two slots being spaced apart by a predetermined distance in the second direction to be staggered in the third direction.

[0007] Technical Solution 2 based on Technical Solution 1: The bottom of the slot is closer to the inside of the circuit board than the connection position of the locking terminal on the circuit board.

[0008] Technical solution three, based on technical solution one, also includes several device groups that correspond one-to-one with the onboard relays; the onboard relays and device groups that correspond to each other are arranged on the circuit board along a third direction; the slot is provided on the circuit board body; the two latching terminals in the same latching terminal group are located on the side where the onboard relay is located and the side where the device group is located, respectively, along a third direction.

[0009] Technical Solution 4 based on Technical Solution 3: The terminal connecting the onboard relay to the circuit board is closer along a third direction to the location of the latching terminal corresponding to the onboard relay than the location of the device group.

[0010] Furthermore, the present invention also provides a fifth technical solution: a power distribution unit, comprising: a plurality of power distribution components as described in any one of technical solutions one to four, each of the distribution components being arranged sequentially along a first direction perpendicular to both the second direction and the third direction; a bus component, comprising a plurality of first busbars and a plurality of second busbars, the first busbars and the second busbars being located on opposite sides of each of the power distribution components along the third direction; the first busbars crossing at least one of the distribution components along the first direction and connecting to latching terminals located in different distribution components, the second busbars connecting to each of the latching terminals located in the distribution component within the distribution component, so as to connect or disconnect the current circuit through the relay.

[0011] Furthermore, the present invention also provides a sixth technical solution: a charging device for charging multiple loads, comprising a distribution unit as described in technical solution five; a plurality of charging modules adapted to connect to a power supply and provide matching electrical energy to the loads; and a wiring component connecting the power distribution unit and each of the charging modules, and having wiring terminals corresponding to each of the loads; each first busbar in the power distribution unit is connected to the charging module through the wiring component, so as to distribute the electrical energy provided by the charging module to the load to at least one of the wiring terminals by switching on and off the relays in the distribution component.

[0012] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects:

[0013] Technical solution one provides a power distribution component. This component features inwardly extending slots along the edge of a circuit board in a third direction. These slots are arranged between adjacent latching terminals in a second direction, thereby dividing the originally structurally continuous circuit board at the edge to form outwardly protruding cantilever arms. These cantilever arms are precisely where the latching terminals are located. Because the cantilever arms are decoupled from the circuit board in their degrees of freedom along the second direction, they possess greater deformation capacity. Simultaneously, with the latching terminals positioned on these cantilever arms, the cantilever structure allows the circuit board to provide appropriate deformation even with tolerances when connected to external conductive components, thus achieving adaptive assembly with multi-point latching. Furthermore, since the slots do not completely cut the circuit board, the circuit board also includes a main body portion without slots. This main body portion provides good load-bearing capacity to external conductive components, thereby preventing excessive deformation of the cantilever arms from causing overall deformation or warping of the circuit board. The slot can be set between each latching terminal or after a gap of multiple latching terminals. In the latter case, it can avoid the excessive deformation capacity of the cantilever due to too few connection parts between the cantilever formed by the slot and the main body of the circuit board, thereby improving the load-bearing capacity of the circuit board for external conductive components.

[0014] Slots are provided on both sides of the circuit board along the third direction, and these slots are located between adjacent latching terminal groups. When the latching terminals on both sides of the circuit board need to bear large stress, the slots distributed on both sides can provide good deformation capacity for the cantilever of the latching terminals on both sides of the circuit board, and can prevent the circuit board from warping due to uneven stress.

[0015] Furthermore, the two slots in the slotted assembly are spaced a predetermined distance apart in the second direction, thus completely offset in the third direction. This offset design increases the length from the bottom of the slot to the other edge of the circuit board, thereby enhancing the load-bearing capacity of the cantilever. This ensures that the cantilever can still provide good structural strength against vertical shear forces within its deformation range, effectively supporting the weight of external conductive components. The completely offset structure maximizes the length from the bottom of the slot to the other edge of the circuit board, thus maximizing the load-bearing capacity of the cantilever.

[0016] In technical solution two, the bottom of the slot is closer to the inside of the circuit board than the connection position of the latching terminal. This means that the depth of the slot is limited relative to the connection position of the latching terminal, ensuring that the depth of the slot can cut off the stress transmission path between the latching terminal and the main body of the circuit board. This forces the stress to bypass the slot and be transmitted through the connection between the cantilever and the main body of the circuit board, thus preventing stress from being transmitted to the connection position between the latching terminal and the circuit board, which could cause the solder joint to crack or peel off.

[0017] Technical solution three also includes component groups, which are surface-mount devices that can be directly mounted on the circuit board to control the on / off state of onboard relays. Onboard relays are paired with component groups, with each component group controlling the on / off state of one onboard relay. The corresponding onboard relays and component groups are arranged along a third direction, thereby enhancing the structural strength of the circuit board in the third direction through the high-strength onboard relays. The structural strength of the circuit board increases closer to the onboard relays. The component groups are positioned close to the onboard relays, which protect the component groups from damage due to circuit board deformation. Furthermore, this arrangement creates airflow channels along a third direction between the onboard relays, facilitating external heat dissipation for the onboard relays.

[0018] In technical solution four, the terminal connecting the onboard relay to the circuit board is located between the device group and the latching terminal, and is closer to the latching terminal. When the onboard relay is cooled by an external fan, the terminal connecting the onboard relay to the circuit board can be closer to the external fan, thereby improving the heat dissipation efficiency of the onboard relay.

[0019] Technical solution five provides a power distribution unit, which includes the aforementioned power distribution component and bus assembly. By replacing the conventional high-voltage DC contactor with an onboard relay, the miniaturization advantage of the onboard relay is utilized, reducing the size of the power distribution unit and lowering the overall manufacturing cost. Since the busbar in the bus assembly is relatively heavy, the aforementioned power distribution component is specifically used. By slotting the circuit board, the circuit board is prevented from deforming or being damaged due to tolerances during assembly of the busbar, and the circuit board can be ensured to support the weight of the busbar without deformation.

[0020] Technical solution six provides a charging device that, due to the adoption of the power distribution unit, greatly improves the utilization rate of its internal space and reduces the overall manufacturing cost. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments are briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is an exploded view of the power distribution unit according to an embodiment of the present invention;

[0023] Figure 2 This is an exploded view of a portion of the power distribution unit involved in an embodiment of the present invention;

[0024] Figure 3 This is a schematic diagram of the power distribution unit according to an embodiment of the present invention along a third direction to the first side;

[0025] Figure 4 This is a schematic diagram of the power distribution unit along a third direction to the second side according to an embodiment of the present invention;

[0026] Figure 5 This is a schematic diagram of the distribution component in the power distribution unit according to an embodiment of the present invention;

[0027] Figure 6 This is a schematic diagram of the allocation component involved in an embodiment of the present invention. Figure 1 ;

[0028] Figure 7 This is a schematic diagram of the allocation component involved in an embodiment of the present invention. Figure 2 ;

[0029] Figure 8 This is a schematic diagram of the allocation component involved in an embodiment of the present invention. Figure 3 ; Figure 9 This is a power flexible distribution topology involved in an embodiment of the present invention.

[0030] Explanation of key figure labels:

[0031] Distribution component 100; circuit board 110; slot 111; first slot 112; second slot 113; onboard relay 120; relay connection terminal 121; latching terminal 130; device group 140;

[0032] Busbar assembly 200; First busbar 210; Second busbar 220; Connector 230;

[0033] Outer frame 300; side frame 310; slide groove 311; slide groove opening 312; slide rail 313; top frame 320; bottom frame 330; limiting plate 340;

[0034] Reinforcing component 400; intermediate fixing component 410. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are preferred embodiments of the present invention and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0036] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and accompanying drawings of this invention is for distinguishing different objects and not for describing a specific order.

[0037] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this invention, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this invention.

[0038] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this invention should be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection by other means or components.

[0039] In the claims, description and accompanying drawings of this invention, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0040] Example 1

[0041] Embodiment 1 of this invention relates to a charging device for charging multiple loads, which may be charging guns used to charge new energy electric vehicles. The charging device includes a power distribution unit provided by this invention, as well as several charging modules and wiring components. The power distribution unit includes a power distribution component 100 provided by this invention.

[0042] The charging module is designed to connect to a power supply and provide matching electrical energy to the load. Specifically, as the core unit of power conversion, the charging module's input is connected to the AC power grid (such as 380V AC), primarily used to convert AC power into high-voltage DC power. Since different models of electric vehicles with varying remaining battery levels have vastly different charging power requirements (e.g., some only require 20kW slow charging, while others require 480kW supercharging), using a fixed "one charger, one gun" configuration would result in low utilization of the charging module. Therefore, the charging equipment in this embodiment adopts a flexible power distribution architecture.

[0043] The wiring component connects the power distribution unit and each charging module, and has terminals corresponding to each load. As the output terminal, the wiring component has multiple terminals (e.g., for connecting to multiple charging guns), each terminal corresponding to a load to be charged. The power distribution unit is positioned between the charging modules and the wiring component, serving as the core actuator of the power switching matrix. The connection relationship between the wiring component and the power distribution unit is described in detail below.

[0044] In this architecture, the DC power output from the charging modules is not directly transmitted to the load, but rather first fed into the power distribution unit. The control system, based on real-time charging demands from each load (such as BMS messages), controls the power distribution unit to flexibly switch the power of one or more charging modules to designated terminals. For example, when a load requires high-power charging, the power distribution unit can connect the outputs of multiple charging modules in parallel and then supply them to the corresponding terminal of that load; when multiple loads are charging simultaneously, the power of different charging modules is independently allocated to each terminal, achieving dynamic power sharing and on-demand distribution.

[0045] The structure of the power distribution unit will now be described in detail.

[0046] Reference Figures 1 to 4 The power distribution unit includes several distribution components 100, a busbar assembly 200, an outer frame 300, and a reinforcing member 400.

[0047] Before further describing the power distribution unit, it is necessary to explain the relevant directions in the specification and claims of this invention. The first, second, and third directions in the specification and claims of this invention are mutually orthogonal and perpendicular directions. In this embodiment, referring to the accompanying drawings, they are respectively referred to as the up-down direction, left-right direction, and front-back direction.

[0048] First, let's explain the allocation component 100. (Refer to...) Figure 5 Each distribution component 100 is stacked sequentially along a first direction, thereby making full use of the cabinet's height space. Each distribution component 100 mainly includes a circuit board 110, several onboard relays 120, and several sets of latching terminals 130. The circuit board 110, as the main supporting body, is elongated and extends along a second direction perpendicular to the first direction. Several onboard relays 120 are linearly arranged on the circuit board 110 at predetermined intervals along the second direction, forming a regular one-dimensional array in space. This layout ensures that when multiple distribution components 100 are stacked along the first direction, all onboard relays 120 form a matrix distribution in the side view plane, facilitating circuit planning.

[0049] To enable the connection and disconnection of large external currents, the circuit board 110 is provided with latching terminal groups 130 corresponding to each onboard relay 120. These latching terminal groups 130 are arranged at predetermined intervals along a second direction. Each latching terminal group 130 includes two latching terminals 130, which are arranged on both sides of the onboard relay 120 along a third direction perpendicular to both the first and second directions. The contacts of the onboard relay 120 are connected in series between the corresponding two latching terminals 130 to control the on / off state of the current loop between them.

[0050] The busbar assembly 200 in this power distribution unit typically uses a heavy copper busbar, and it needs to be latched to the latching terminal 130 in the distribution assembly 100. Multiple connections can easily accumulate manufacturing tolerances; if the copper busbar is directly latched to the rigid circuit board 110, it can easily cause the circuit board 110 to twist or the solder joints to crack. Therefore, refer to... Figure 6The circuit board 110 has several inwardly extending slots 111 on at least one edge along a third direction. Here, "inwardly extending" refers to extending from one edge of the circuit board 110 along the third direction toward the other edge. Specifically, at least one slot 111 is provided between two adjacent latching terminals 130 along the second direction. This slot 111 penetrates the thickness direction of the circuit board 110, thereby physically dividing the originally continuous edge structure of the circuit board 110 into several relatively independent cantilever structures, on which the aforementioned latching terminals 130 are fixed. Through this slot 111 design, the cantilever area where the latching terminals 130 are located is decoupled from the central body of the circuit board 110 in terms of force. When the bus assembly 200 is connected to the latching terminals 130, if there is a small positional deviation or flatness tolerance, the cantilever can adaptively compensate by undergoing moderate micro-deformation using the elasticity of the material itself, without transmitting huge mechanical stress to the main body of the circuit board 110 or the solder pins of the onboard relay 120.

[0051] Preferred, refer to Figure 6 The bottom of the slot 111 extends to a depth inside the circuit board 110, and is set to be closer to the inner center line of the circuit board 110 than the connection position of the latching terminal 130. See the attached diagram for details. Figure 6 The positional difference between the two is indicated by the red dashed line. This depth setting cuts off the direct inward transmission path of stress, forcing the stress to bypass the root of slot 111, further protecting the reliability of the electrical connection point.

[0052] In this embodiment, the circuit board 110 has slots 111 on both sides of its third-direction edges, forming a plurality of slot groups 111. To address the uneven stress caused by the possibility of connecting different busbar specifications on both sides of the circuit board 110 (e.g., one side connecting a vertical busbar across a component, and the other side connecting a horizontal busbar within the component), the slot groups 111 can adopt an asymmetrical design. For example, two slots 111 located on the two sides of the circuit board 110 within the same slot group 111 can be staggered at a predetermined distance in the second direction, rather than being opposite each other on a straight line. This ensures that the effective width of the main body of the circuit board 110 is maximized, maintaining the overall longitudinal rigidity of the circuit board 110.

[0053] Furthermore, the slot 111 on the circuit board 110 does not need to be provided between each group of adjacent latching terminals 130; instead, a slot 111 can be provided after a series of latching terminals 130 in the second direction. For example, refer to... Figure 6 A slot 111 is provided at the middle position of the second direction near the circuit board 110, which spans three latching terminals 130.

[0054] In addition, to achieve drive control of the onboard relay 120, the circuit board 110 is also provided with several device groups 140 (including surface mount components such as driver chips, resistors, and capacitors). Each device group 140 corresponds one-to-one with the onboard relay 120, and the two are arranged side by side along the third direction. Specifically, two latching terminals 130 in the same latching terminal group 130 are located on the outer sides of the assembly of the onboard relay 120 and the device group 140, respectively. This layout not only uses the larger onboard relay 120 as a structural skeleton to enhance the strength of the circuit board 110 in the third direction, but also leaves gaps between the onboard relays 120 that generate a lot of heat, forming a through airflow in the second direction, which is beneficial for heat dissipation in conjunction with an external fan. To further optimize heat dissipation, the pin terminals connecting the onboard relay 120 to the circuit board 110, namely the relay connection terminals 121, are designed to be closer to the edge of the circuit board 110 than the device group 140, thus being closer to the windward side of the air-cooled heat dissipation airflow and improving heat exchange efficiency. The location of the terminals connecting the onboard relay 120 to the circuit board 110 can be referred to Figure 8 As shown.

[0055] Next, the structure of the bus assembly 200 will be described. The bus assembly 200 is used to realize the electrical interconnection between the aforementioned distribution components 100 and between the various onboard relays 120 within the distribution components 100, forming a structure as follows: Figure 9 The flexible distribution matrix topology is shown. The bus component 200 mainly includes several first busbars 210 and several second busbars 220, which are orthogonally distributed in space. Together with the onboard relays 120 arranged in an array, they constitute the power distribution structure of the power distribution unit.

[0056] The first busbar 210 extends along a first direction (i.e., the vertical direction). Physically, each first busbar 210 spans multiple distribution components 100 arranged sequentially along the first direction. (Refer to...) Figure 9 In the circuit topology shown, the first bus 210 corresponds to the line marked in blue. Figure 9 (Only part of the circuit is marked in the image) connects the charging buses corresponding to different charging modules. One end of the first bus 210 is connected to the aforementioned charging module via a wiring component to introduce DC power output from the charging module. On the extended path, the first bus 210 is connected to the latching terminal 130 (i.e., the latching terminal 130 located on the side of the onboard relay 120) corresponding to the positions in different distribution components 100, thereby transmitting the power of the same charging module to different levels of distribution components 100.

[0057] The second busbar 220 extends along the second direction (i.e., the left-right direction). Physically, the second busbar 220 is primarily arranged within the extension range of the single distribution component 100. (Refer to...) Figure 9 The circuit topology shown here, these second buses 220 are equivalent to the lines marked in red ( Figure 9 (Only a portion of the wiring is shown in the diagram), which refers to the horizontal connections between adjacent switches. Each second bus 220 is connected to a specific terminal to collect electrical energy switched by the onboard relay 120 and output it to the load.

[0058] Furthermore, this embodiment also employs a double-sided wiring structure. Specifically, the two sides of the distribution component 100 along a third direction (i.e., the front-to-back direction) are defined as the first side and the second side, respectively. The first bus 210 and the second bus 220 are located on opposite sides of the distribution component 100 along the third direction, respectively. For example, referring to... Figure 3 and Figure 4 All vertically extending first buses 210 are arranged on the first side (e.g., the front side) of the circuit board 110 along a third direction, while all horizontally extending second buses 220 are arranged on the second side (e.g., the rear side) of the circuit board 110 along a third direction. In this layout, the current conduction path is clear: current from the charging module first enters the first bus 210 located on the first side; subsequently, the current reaches the corresponding latching terminal 130 on the second side of the circuit board 110 through a corresponding connector 230, and then connects to a corresponding onboard relay 120 through the second bus 220; if the control system closes the onboard relay 120, the current flows through the internal contacts of the relay to another latching terminal 130 located on the first side of the circuit board 110, and then through the latching terminal 130 to the corresponding other first bus 210, and then through the first bus 210 to the load. This design makes... Figure 9 Each switch in the topology physically corresponds to a specific onboard relay 120. By controlling the on / off state of the onboard relay 120, the connection or disconnection between any vertical line and any horizontal line can be achieved.

[0059] In addition, the busbar assembly 200 also includes several connection bars 230, which are also copper busbars. They cross the first and second sides of the distribution assembly 100 in a third direction to connect the latching terminals 130 corresponding to the different onboard relays 120 located on both sides. The first busbar 210 and the second busbar 220 on the first and second sides are connected through the connection bars 230 to form a complete matrix switching circuit.

[0060] The power distribution unit provided in this embodiment includes a positive line and a negative line, therefore its actual number of switches is: Figure 9 Twice the topology shown.

[0061] Next, the structure of the outer frame 300 will be explained.

[0062] Reference Figure 1 and Figure 2 The outer frame 300 includes two side frames 310 spaced apart along a second direction, and a top frame 320 and a bottom frame 330 connecting the top and bottom of the side frames 310. The side frames 310 extend along a first direction and have a plurality of grooves 311 arranged along the first direction on their inner surfaces. The grooves 311 extend along a third direction, and their openings (e.g., openings facing the first side), i.e., groove openings 312, are flared outwards in a trumpet shape. During installation, both ends of the circuit board 110 in the dispensing assembly 100 are inserted into the corresponding grooves 311 along the third direction. The trumpet-shaped groove openings 312 serve as guides, facilitating the quick alignment and insertion of the circuit board 110. After the dispensing assembly 100 is inserted into place, a removable limiting baffle is installed on the other side (e.g., the second side) of the side frame 310 to block the openings of the grooves 311, thereby restricting the dispensing assembly 100 from disengaging along the third direction. When maintenance is required on a particular distribution component 100, it is only necessary to remove the connecting bolts of the first busbar 210 and the second busbar 220 connected to the distribution component 100 and remove the limit baffle. The specific distribution component 100 can then be pulled out of the outer frame 300 for inspection or replacement without disassembling the entire power distribution unit, which greatly improves the convenience of maintenance.

[0063] The outer frame 300 also includes a slide rail 313, which can be fixedly installed on the inner side of the side frame 310 by bolts, and a groove 311 is formed on the slide rail 313.

[0064] Furthermore, given that the second bus 220 extends a long distance horizontally and needs to carry the large current after convergence, it is relatively heavy. To prevent the second bus 220 from generating excessive torque on the circuit board 110 and to prevent the circuit board 110 from deforming due to the weight, this embodiment also includes at least one reinforcing member 400. (Refer to...) Figure 1 The reinforcing member 400 extends along the first direction, with one end (e.g., the top or bottom end) securely connected to the top frame 320 and / or the bottom frame 330 of the outer frame 300, and the other end spanning several distribution components 100 and mechanically fixed to the intermediate fixing member 410 located in the middle position in the vertical direction and fixed to the two side frames 310.

[0065] Finally, the connection relationship between the wiring components and the power distribution unit in the charging equipment is explained. The wiring components are used to introduce electrical energy into the power distribution unit and to output the distributed electrical energy to the load. The wiring components connect the power distribution unit and each charging module, and are provided with terminals corresponding to each load. The wiring components mainly include a terminal block connecting each first busbar 210 in the power distribution unit. One end of this terminal block is connected to the end of a first busbar 210 of the charging module and the power distribution unit, and the other end forms a terminal block connected to a load. When charging is required, a load is connected to a terminal block, and the electrical energy of the charging module can be directly output to the load through the terminal block. At the same time, the electrical energy of other charging modules can be connected to this terminal block through the power distribution unit, thereby realizing flexible switching.

[0066] Example 2

[0067] The difference between Embodiment 2 and Embodiment 1 is that the structure of the slot 111 in the circuit board 110 of the distribution component 100 is different.

[0068] Reference Figure 7 In Embodiment 2, the circuit board 110 has a group of three slots 111. Two of these slots 111 are located on one side edge of the circuit board 110 along a third direction, forming two first slots 112. The other slot 111 is located on the other side edge, forming a second slot 113. The width of the second slot 113 is greater than that of the first slot 112. This arrangement creates a cantilever structure with a certain width along a second direction between the two first slots 112, which can accommodate uneven stress on the two sides of the circuit board 110 in the third direction, effectively improving the overall structural strength of the circuit board 110. Preferably, the distance between the two first slots 112 is set to be approximately equal to the width of the second slot 113 to ensure the symmetry of the portion of the circuit board 110 used to mount the latching terminal 130 in the third direction. Preferably, one side of the circuit board 110 with the first slot 112 is located on the first side corresponding to the first busbar 210, and one side of the circuit board 110 with the second slot 113 is located on the second side corresponding to the second busbar 220.

[0069] Example 3

[0070] The difference between Embodiment 3 and Embodiment 1 is that the structure of the slot 111 in the circuit board 110 of the distribution component 100 is different.

[0071] Reference Figure 8In Embodiment 3, the circuit board 110 has two slots 111, which are located on one side edge of the circuit board 110 along a third direction. The width of one slot 111 is greater than that of the other slot 111. The slot 111 with the narrower width can be located in the middle of its two adjacent latching terminals 130. Preferably, the side of the circuit board 110 with the narrower slot 111 is located on the first side corresponding to the first busbar 210, and the side of the circuit board 110 with the wider slot 111 is located on the second side corresponding to the second busbar 220.

[0072] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this invention, but does not constitute a limitation on the scope of protection of this invention. Modifications, equivalent substitutions, or other improvements to the embodiments of this invention or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this invention or the foregoing embodiments, in conjunction with common knowledge, general technical knowledge, and / or existing technology, should all be included within the scope of protection of this invention.

Claims

1. A power distribution component (100), characterized in that, include: Circuit board (110) extending along a second and a third direction that are perpendicular to each other; A plurality of onboard relays (120) are arranged on the circuit board (110) at predetermined intervals along a second direction; and A plurality of latching terminal groups, each of the latching terminal groups including two latching terminals (130) that are connected to an onboard relay (120) along a third direction and fixed to the circuit board (110); The circuit board (110) includes a plurality of slot groups, each of which is located between two adjacent latching terminal groups along the second direction; each of the slot groups includes two slots (111) located on one side edge of the circuit board (110) along the third direction and extending inward along the third direction, the two slots (111) being spaced apart by a predetermined distance in the second direction to be staggered in the third direction.

2. The power distribution component (100) as described in claim 1, characterized in that, The bottom of the slot (111) is closer to the inside of the circuit board (110) than the connection position of the latching terminal (130) on the circuit board (110).

3. The power distribution component (100) as described in claim 1, characterized in that, It also includes several device groups (140) that correspond one-to-one with the onboard relay (120); the onboard relay (120) and the device group (140) that correspond to each other are arranged on the circuit board (110) along a third direction; the slot (111) is provided on the body of the circuit board (110); the two latching terminals (130) in the same latching terminal group are respectively located on the side where the onboard relay (120) is located and on the side where the device group (140) is located along a third direction.

4. A power distribution component (100) as described in claim 3, characterized in that, The terminal connecting the onboard relay (120) to the circuit board (110) is closer along a third direction to the location of the latching terminal (130) corresponding to the onboard relay (120) than the location of the device group (140).

5. A power distribution unit, characterized in that it comprises: A plurality of power distribution components (100) as described in any one of claims 1-4, wherein each of the distribution components (100) is arranged sequentially along a first direction that is perpendicular to both the second direction and the third direction; A bus assembly (200) includes a plurality of first buses (210) and a plurality of second buses (220), the first buses (210) and the second buses (220) being located on opposite sides of each of the power distribution assemblies (100) along a third direction; the first buses (210) are connected to latching terminals (130) located in different distribution assemblies (100) across at least one of the distribution assemblies (100) along a first direction, and the second buses (220) are connected to latching terminals (130) located in the distribution assembly (100) within the distribution assembly (100) to connect or disconnect current loops via the relay (120).

6. A charging device for charging multiple loads, characterized in that, Includes a distribution unit as described in claim 5; and Several charging modules, adapted to connect to a power supply and provide matching electrical energy to the load; and A wiring component, which connects the power distribution unit and each of the charging modules, and is provided with wiring terminals corresponding to each of the loads; Each of the first busbars (210) in the power distribution unit is connected to the charging module through the wiring component, so as to distribute the electrical energy provided by the charging module to the load to at least one of the wiring terminals by switching on and off the relays (120) in the distribution component (100).

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