Power distribution circuit and direct current charging pile
By designing a power distribution circuit including multiple charging power packets, DC output ports and DC contactors, the problems of high cost, high failure rate and complex logic in the prior art DC charging pile are solved, and the effects of fully flexible power distribution and cost reduction are achieved.
Patent Information
- Application Number
- CN202520321415.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2035-02-26
AI Technical Summary
The power distribution circuits of existing DC charging piles have problems such as high cost, high failure rate and complex logic, and cannot achieve fully flexible power distribution.
A power distribution circuit is designed, including multiple charging power packets, multiple DC output ports and multiple sets of DC contactors. The number of DC output ports is less than the number of charging power packets. Each DC output port is electrically connected to multiple adjacent charging power packets through a DC contactor to achieve fully flexible power distribution.
It realizes fully flexible power distribution, reduces the number of DC contactors, reduces the failure rate and cost, and has a simple and clear logic.
Smart Images
Figure CN222691424U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of power distribution circuits, and in particular to a power distribution circuit and a DC charging pile. Background Art
[0002] In the related art, the power distribution circuit of the DC charging pile includes a matrix power distribution circuit, a multi-channel series power distribution circuit and a multi-dimensional power distribution circuit. Among them, the matrix power distribution circuit uses DC contactors in parallel to realize power distribution between each output circuit. Its disadvantage is that there are many DC contactors, which leads to high system cost, increased system failure rate and complex control logic. The multi-channel series power distribution circuit uses DC contactors in series to realize power distribution between each output circuit. Compared with the matrix power distribution, the cost is low, but the disadvantage is that it cannot achieve full flexible distribution, and the power distribution logic itself has defects. In the multi-dimensional power distribution circuit, the number of charging power packs and DC output ports is the same, and the number of DC contactors required is large. Its disadvantage is that the number of DC contactors is large and the system cost is high. Utility Model Content
[0003] The present application provides an improved power distribution circuit and a DC charging pile.
[0004] The present application provides a power distribution circuit, including: multiple charging power packs, multiple DC output ports and multiple groups of DC contactors, the multiple charging power packs are connected in parallel between an AC power supply and the multiple DC output ports, the number of the DC output ports is less than the number of the charging power packs, each of the DC output ports is correspondingly connected to one of the charging power packs, the charging power pack serves as an inherent power pack corresponding to the DC output port, and each of the DC output ports is electrically connected to the charging power packs arranged adjacent to the corresponding inherent power packs through the multiple groups of DC contactors, and the charging power packs arranged adjacent to the inherent power packs corresponding to other DC output ports.
[0005] Preferably, the multiple inherent power packs corresponding to the multiple DC output ports are arranged at intervals, and the multiple charging power packs adjacent to the multiple inherent power packs all serve as auxiliary power packs of each DC output port, and each DC output port is electrically connected to the multiple auxiliary power packs through the multiple groups of DC contactors.
[0006] Preferably, when the charging power demand of one of the DC output ports is not greater than the charging power of the corresponding inherent power package, the DC output port is preferentially connected to the corresponding inherent power package for charging.
[0007] Preferably, when the charging power demand of one of the DC output ports is greater than the charging power of the corresponding inherent power pack, but not greater than the charging power of the inherent power pack corresponding to the DC output port plus the charging power of all the auxiliary power packs, the DC output port calls the corresponding inherent power pack, then calls at least one of the auxiliary power packs in an idle state, and controls the corresponding DC contactor to close.
[0008] Preferably, the power distribution circuit also includes a controller electrically connected to the multiple groups of DC contactors; when the charging power demand of one of the DC output ports is greater than the charging power of the corresponding inherent power pack, and is not greater than the charging power of the inherent power pack corresponding to the DC output port plus the charging power of all the auxiliary power packs, the controller controls at least one of the DC contactors between the inherent power pack corresponding to the DC output port and at least one of the auxiliary power packs in an idle state to close, so that the inherent power pack corresponding to the DC output port and at least one of the auxiliary power packs in an idle state are charged.
[0009] Preferably, when the charging power demand of one of the DC output ports is greater than the charging power of the inherent power package corresponding to the DC output port plus the charging power of all the auxiliary power packages, the DC output port calls the corresponding inherent power package and all the auxiliary power packages, and then calls at least one other inherent power package that is in an idle state, and controls the corresponding DC contactor to close.
[0010] Preferably, the power distribution circuit also includes a controller, which is electrically connected to the multiple groups of DC contactors; when the charging power demand of one of the DC output ports is greater than the charging power of the inherent power pack corresponding to the DC output port plus the charging power of all the auxiliary power packs, the controller controls the multiple DC contactors arranged between the inherent power pack corresponding to the DC output port and all the auxiliary power packs to close, and controls at least one of the inherent power packs in an idle state to be connected, so that the inherent power pack corresponding to the DC output port, all the auxiliary power packs and at least one of the inherent power packs in an idle state are charged.
[0011] Preferably, the number of the charging power packs is at least twice the number of the DC output ports, and the number of groups of the DC contactors is at least three times the number of the DC output ports.
[0012] Preferably, the number of the DC output ports is at least m, the number of the charging power packs is at least 2m, and the number of the DC contactors is at least 3m; wherein m=3*2 n-1 , n is a positive integer greater than or equal to 1.
[0013] The present application also provides a DC charging pile, comprising a power distribution circuit as described in any one of the above embodiments.
[0014] The power distribution circuit and DC charging pile of the embodiment of the present application. The power distribution circuit includes multiple charging power packs, multiple DC output ports and multiple groups of DC contactors. The number of DC output ports is less than the number of charging power packs. Each DC output port is connected to one of the charging power packs, which serves as the inherent power pack corresponding to the DC output port, and each DC output port is electrically connected to the charging power packs arranged adjacent to the corresponding inherent power packs through multiple groups of DC contactors, and the charging power packs arranged adjacent to the inherent power packs corresponding to other DC output ports. The power distribution circuit of the present application is suitable for scenarios where the number of DC output ports is less than the number of charging power packs, can achieve fully flexible power distribution, and the number of required DC contactors is reduced, the logic is simple, and the failure rate and cost are low.
[0015] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.
[0017] Figure 1 FIG. 1 is a functional block diagram of an embodiment of a power distribution circuit of the present application.
[0018] Figure 2 Shown Figure 1 The power distribution schematic diagram of the power distribution circuit shown.
[0019] Figure 3 Shown Figure 1 A functional block diagram of an embodiment of a power distribution circuit is shown.
[0020] Figure 4 Shown Figure 1 A functional block diagram of another embodiment of a power distribution circuit is shown.
[0021] Figure 5 Shown Figure 1 A functional block diagram of another embodiment of a power distribution circuit is shown.
[0022] Figure 6 Shown Figure 1 A functional block diagram of another embodiment of a power distribution circuit is shown.
[0023] Figure 7 Shown Figure 1 A functional block diagram of another embodiment of a power distribution circuit is shown.
[0024] Figure 8 Shown Figure 1 A functional block diagram of another embodiment of a power distribution circuit is shown.
[0025] Fig. 9 Shown Figure 1 A power distribution schematic diagram of another embodiment of a power distribution circuit is shown. DETAILED DESCRIPTION
[0026] The power distribution circuit and the DC charging pile provided in the embodiments of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can be combined with each other at will.
[0027] Figure 1 Shown is a principle block diagram of an embodiment of the power distribution circuit 1 of the present application. Figure 2 Shown Figure 1 The power distribution schematic diagram of the power distribution circuit 1 is shown in FIG. Figure 1 and Figure 2 As shown, the power distribution circuit 1 includes multiple charging power packs, multiple DC output ports and multiple groups of DC contactors. Multiple charging power packs are connected in parallel between an AC power source and multiple DC output ports. The number of DC output ports is less than the number of charging power packs. Each DC output port corresponds to one of the charging power packs, which serves as the inherent power pack of the DC output port. And each DC output port is electrically connected to the charging power packs arranged adjacent to the corresponding inherent power packs through multiple groups of DC contactors, and the charging power packs arranged adjacent to the inherent power packs corresponding to other DC output ports.
[0028] In this embodiment, multiple charging power packs are represented by M1~M6. Multiple DC output ports are represented by DC1~DC3. Multiple groups of DC contactors are represented by KM1~KM9, wherein each group of DC contactors includes positive and negative connection terminals (not shown in the figure). Multiple charging power packs M1~M6 are connected in parallel between the AC power supply and multiple DC output ports DC1~DC3. Among them, each DC output port corresponds to an inherent charging power pack and is connected to multiple adjacent charging power packs through a DC contactor.
[0029] Specifically, the DC output port DC1 is connected to the charging power pack M1, which is the inherent power pack of the DC output port DC1. The DC output port DC1 is electrically connected to the charging power pack M2 disposed adjacent to the charging power pack M1 through the DC contactor KM1, is electrically connected to the charging power pack M4 disposed adjacent to the charging power pack M3 through the DC contactor KM7, and is electrically connected to the charging power pack M6 disposed adjacent to the charging power pack M5 through the DC contactor KM6.
[0030] The DC output port DC2 is connected to the charging power pack M3, which is the inherent power pack of the DC output port DC2. The DC output port DC2 is electrically connected to the charging power pack M4 arranged adjacent to the charging power pack M3 through the DC contactor KM3, is electrically connected to the charging power pack M2 arranged adjacent to the charging power pack M1 through the DC contactor KM2, and is electrically connected to the charging power pack M6 arranged adjacent to the charging power pack M5 through the DC contactor KM9.
[0031] The DC output port DC3 is connected to the charging power pack M5, which is the inherent power pack of the DC output port DC3. The DC output port DC3 is electrically connected to the charging power pack M6 adjacent to the charging power pack M5 through the DC contactor KM5, is electrically connected to the charging power pack M2 adjacent to the charging power pack M1 through the DC contactor KM8, and is electrically connected to the charging power pack M4 adjacent to the charging power pack M3 through the DC contactor KM4.
[0032] The power distribution circuit 1 of the present application is suitable for scenarios where the number of DC output ports is less than the number of charging power packs, can achieve fully flexible power distribution, and the number of required DC contactors is reduced, the logic is simple, and the failure rate and cost are low.
[0033] exist Figure 1 and Figure 2 In the embodiment shown, multiple inherent power packages corresponding to multiple DC output ports are arranged at intervals. Specifically, the inherent power package corresponding to the DC output port DC1 is the charging power package M1. The inherent power package corresponding to the DC output port DC2 is the charging power package M3. The inherent power package corresponding to the DC output port DC3 is the charging power package M5. The charging power packages M1, M3, and M5 are arranged at intervals. Figure 1 In the embodiment shown, multiple charging power packs adjacent to multiple inherent power packs are used as auxiliary power packs for each DC output port, and each DC output port is electrically connected to multiple auxiliary power packs through multiple groups of DC contactors. An auxiliary power pack is arranged between two adjacent inherent power packs, and multiple auxiliary power packs can be used as backup power packs for each DC output port.
[0034] exist Figure 1 and Figure 2In the illustrated embodiment, the charging power pack M2 disposed adjacent to the charging power pack M1, the charging power pack M4 disposed adjacent to the charging power pack M3, and the charging power pack M6 disposed adjacent to the charging power pack M5 can all be used as auxiliary power packs for the DC output ports DC1, DC2, and DC3. Each DC output port DC1 or DC2 or DC3 is electrically connected to a plurality of auxiliary power packs through a plurality of groups of DC contactors, respectively. For example, the DC output port DC1 is electrically connected to the charging power pack M2 through the DC contactor KM1, is electrically connected to the charging power pack M4 through the DC contactor KM7, and is electrically connected to the charging power pack M6 through the DC contactor KM6. The DC output port DC2 is electrically connected to the charging power pack M2 through the DC contactor KM2, is electrically connected to the charging power pack M4 through the DC contactor KM3, and is electrically connected to the charging power pack M6 through the DC contactor KM9. The DC output port DC3 is electrically connected to the charging power pack M2 through the DC contactor KM8, is electrically connected to the charging power pack M4 through the DC contactor KM4, and is electrically connected to the charging power pack M6 through the DC contactor KM5.
[0035] Combination Figure 2 It can be seen that the charging power packs M2, M4, and M6 can all be used as shared power packs for each DC output port DC1, DC2, or DC3. The link between the DC output port and the charging power pack can clearly indicate the coordination relationship between the DC output port and the charging power pack. The logic is simple and clear. This arrangement enables the power distribution circuit 1 to adapt to the scenario where the number of DC output ports is less than the number of charging power packs. On the basis of achieving full flexible power distribution, the number of DC contactors can be reduced, and the failure rate and cost can be reduced.
[0036] exist Figure 1 and Figure 2 In the embodiment shown, the number of DC output ports is at least m, the number of charging power packs is at least 2m, and the number of groups of DC contactors is at least 3m. Where m=3*2 n-1 , n is a positive integer greater than or equal to 1. For example, when n is 1, m is 3, 2m is 6, and 3m is 9; when n is 2, m is 6, 2m is 12, and 3m is 18; when n is 3, m is 12, 2m is 24, and 3m is 36. By analogy, as n increases, m, 2m, and 3m also increase accordingly. The rule of increase is m=3*2 n-1 That is, when the minimum value of n is 1, the minimum value of m is 3, the minimum value of 2m is 6, and the minimum value of 3m is 9. Figure 1 and Figure 2As shown, the number of DC output ports is at least 3, the number of charging power packs is at least 6, and the number of groups of DC contactors is at least 9. The figure shows only 9 groups of DC contactors, each of which has 2, 1 positive and 1 negative, for a total of 18, which are not shown in the figure.
[0037] exist Figure 1 and Figure 2 In the illustrated embodiment, the number of charging power packs is at least twice the number of DC output ports, and the number of groups of DC contactors is at least three times the number of DC output ports. For example, in this embodiment, the number of DC output ports is at least 3, the number of charging power packs is at least 6, and the number of groups of DC contactors is at least 9. It can be concluded that the number of charging power packs is at least twice the number of DC output ports, and the number of groups of DC contactors is at least three times the number of DC output ports. In this way, the quantitative relationship between the DC output ports, the charging power packs, and the DC contactors can be determined.
[0038] Compared with the related art, the power distribution circuit 1 of the present application is suitable for scenarios where the number of DC output ports is less than the number of charging power packs, can achieve fully flexible power distribution, and the number of required DC contactors is reduced, with lower failure rate and cost.
[0039] In some embodiments, when the charging power requirement of one of the DC output ports is not greater than the charging power of the corresponding inherent power package, the DC output port is preferentially connected to the corresponding inherent power package for charging. Figure 1 and Figure 2 In the illustrated embodiment, when the charging power demand of the DC output port DC1 is not greater than the charging power of the charging power package M1, the DC output port DC1 preferentially calls or defaults to the charging power package M1 for charging. The inherent power package corresponding to the DC output port DC2 is the charging power package M3. When the charging power demand of the DC output port DC2 is not greater than the charging power of the charging power package M3, the DC output port DC2 preferentially calls or defaults to the charging power package M3 for charging. The inherent power package corresponding to the DC output port DC3 is the charging power package M5. When the charging power demand of the DC output port DC3 is not greater than the charging power of the charging power package M5, the DC output port DC3 preferentially calls or defaults to the charging power package M5 for charging. With such a configuration, when the charging demand is relatively small, the charging demand can be met without any power allocation, and the inherent power package preferentially responds to the charging demand of this port.
[0040] It should be noted that priority calling can be understood as priority connection or access. When the DC output port has power demand, it can be connected automatically or through a control switch, which is not limited in this application.
[0041] In this embodiment, multiple groups of DC contactors can all be electrically controlled contactors. The power distribution circuit 1 also includes a controller (not shown), which is electrically connected to the multiple groups of DC contactors. The controller is used to control the on and off of the DC contactors according to power requirements or deployment instructions. Different power requirements or different deployment instructions correspond to different controlled DC contactors, thereby connecting different charging power packages. Please refer to the following for details.
[0042] In some embodiments, when the charging power demand of one of the DC output ports is greater than the charging power of the corresponding inherent power package, but not greater than the charging power of the inherent power package corresponding to the DC output port plus the charging power of all auxiliary power packages, the DC output port calls the corresponding inherent power package, then calls at least one auxiliary power package in an idle state, and controls the corresponding DC contactor to close.
[0043] exist Figure 1 and Figure 2 In the illustrated embodiment, if the charging power packages M2, M4, and M6 are all in an idle state, when the charging power demand of the DC output port DC1 is greater than the charging power of the corresponding charging power package M1, and is not greater than the sum of the charging powers of the charging power packages M1, M2, M4, and M6, the DC output port DC1 may call the idle charging power package M2 or the charging power package M4 or the charging power packages M2, M4, or the charging power packages M2, M4, and M6 after calling the corresponding charging power package M1. Similarly, when the charging power demand of the DC output port DC2 is greater than the charging power of the corresponding charging power package M3, and is not greater than the sum of the charging powers of the charging power packages M3, M2, M4, and M6, the DC output port DC2 may call the idle charging power package M2 or the charging power package M4 or the charging power packages M2, M4, or the charging power packages M2, M4, and M6 after calling the corresponding charging power package M3. Similarly, when the charging power demand of the DC output port DC3 is greater than the charging power of the corresponding charging power package M5, and is not greater than the sum of the charging powers of the charging power packages M5, M2, M4, and M6, the DC output port DC3 can call the idle charging power package M2 or charging power package M4 or charging power packages M2, M4, or charging power packages M2, M4, and M6 after calling the corresponding charging power package M5. With such a setting, full flexible power distribution can be achieved according to actual needs, the number of DC contactors can be minimized, and the failure rate and cost can be reduced.
[0044] In some embodiments, when the charging power demand of one of the DC output ports is greater than the charging power of the corresponding inherent power pack, and is not greater than the charging power of the inherent power pack corresponding to the DC output port plus all the auxiliary power packs, the controller controls at least one set of DC contactors between the inherent power pack corresponding to the DC output port and at least one auxiliary power pack in an idle state to close, so that the inherent power pack corresponding to the DC output port and at least one auxiliary power pack in an idle state are charged. This embodiment is described by taking the DC output port DC1 as an example. For details, please refer to the following Figures 3 to 5 As shown in the embodiment.
[0045] Figure 3 Shown Figure 1 The schematic diagram of an embodiment of the power distribution circuit 1 is shown in FIG. Figure 3 As shown, when the charging power demand of the DC output port DC1 is greater than the charging power of the corresponding charging power package M1, and is not greater than the sum of the charging powers of the charging power packages M1, M2, M4, and M6, and when the DC output port DC1 requires two charging power packages to meet the charging power demand, if the charging power package M2 adjacent to the charging power package M1 is idle, the controller controls the DC contactor KM1 to close, and calls the charging power package M2, so that the charging power package M1 and the charging power package M2 are charged together.
[0046] Figure 4 Shown Figure 1 A principle block diagram of another embodiment of the power distribution circuit 1 is shown. Figure 4 The embodiment shown is Figure 3 The embodiment shown is similar, with the main difference being that when the DC output port DC1 requires three charging power packs to meet the charging power demand, if the charging power packs M2 and M4 are idle, the controller controls the DC contactors KM1 and KM7 to close, and calls the charging power packs M2 and M4, so that the charging power pack M1 is charged together with the charging power packs M2 and M4.
[0047] Figure 5 Shown Figure 1 A principle block diagram of another embodiment of the power distribution circuit 1 is shown. Figure 5 The embodiment shown is Figure 4 The embodiment shown is similar, with the main difference being that when the DC output port DC1 requires four charging power packs to meet the charging power demand, if the charging power packs M2, M4, and M6 are all idle, the controller controls the DC contactors KM1, KM7, and KM6 to be closed, and calls the charging power packs M2, M4, and M6, so that the charging power pack M1 is charged together with the charging power packs M2, M4, and M6.
[0048] Similarly, if the charging power requirement of the DC output port DC2 or DC output port DC3 is similar to the charging power requirement of the DC output port DC1, the above logic can be used for allocation. With such a configuration, the power distribution circuit 1 of this embodiment can be flexibly allocated according to the power demand, not only giving priority to allocating the inherent power package, but also allocating the appropriate auxiliary power package according to the principle of proximity, and the control logic and implementation method are simple.
[0049] In some embodiments, when the charging power demand of one of the DC output ports is greater than the charging power of the inherent power package corresponding to the DC output port plus the charging power of all auxiliary power packages, the DC output port calls the corresponding inherent power package and all auxiliary power packages, and then calls at least one other inherent power package that is in an idle state, and controls the corresponding DC contactor to close.
[0050] exist Figure 1 and Figure 2 In the illustrated embodiment, when the charging power demand of the DC output port DC1 is greater than the sum of the charging powers of the charging power packages M1, M2, M4, and M6, the DC output port DC1 may call other idle charging power packages M3 or M5 after calling the corresponding charging power packages M1, M2, M4, and M6. Similarly, when the charging power demand of the DC output port DC2 is greater than the sum of the charging powers of the charging power packages M3, M2, M4, and M6, the DC output port DC2 may call other idle charging power packages M1 or M5 after calling the corresponding charging power packages M3, M2, M4, and M6. Similarly, when the charging power demand of the DC output port DC3 is greater than the sum of the charging powers of the charging power packages M5, M2, M4, and M6, the DC output port DC3 may call other idle charging power packages M1 or M3 after calling the corresponding charging power packages M5, M2, M4, and M6. This setting can achieve fully flexible power distribution, minimize the number of DC contactors, and reduce failure rates and costs.
[0051] In some embodiments, when the charging power demand of one of the DC output ports is greater than the charging power of the inherent power pack of the DC output port plus all the auxiliary power packs, the controller controls the multiple DC contactors set between the inherent power pack corresponding to the DC output port and all the auxiliary power packs to close, and controls at least one inherent power pack in an idle state to be connected, so that the inherent power pack corresponding to the DC output port, all the auxiliary power packs and at least one inherent power pack in an idle state can be charged. This embodiment is described by taking the DC output port DC1 as an example. For details, please refer to the following Figures 6 to 8 As shown in the embodiment.
[0052] Figure 6 Shown Figure 1FIG. 1 is a schematic block diagram of another embodiment of the power distribution circuit 1 shown in FIG. Figure 6 As shown, when the charging power demand of the DC output port DC1 is greater than the sum of the charging powers of the inherent power pack M1 of the DC output port DC1 plus all the auxiliary power packs M2, M4, and M6, and when the DC output port DC1 requires five charging power packs to meet the charging power demand, if the charging power packs M2, M4, M6, and M3 are all idle, the controller controls the DC contactors KM1, KM7, KM6, and KM2 to be closed, and calls the charging power packs M2, M4, M6, and M3, so that the charging power pack M1 is charged together with the charging power packs M2, M4, M6, and M3.
[0053] Figure 7 Shown Figure 1 A principle block diagram of another embodiment of the power distribution circuit 1 is shown. Figure 7 The embodiment shown is Figure 6 The embodiment shown is similar, with the main difference being that when the DC output port DC1 requires five charging power packs to meet the charging power demand, if the charging power packs M2, M4, M6, and M5 are all idle, the controller controls the DC contactors KM1, KM7, KM6, and KM8 to be closed, and calls the charging power packs M2, M4, M6, and M5, so that the charging power pack M1 is charged together with the charging power packs M2, M4, M6, and M5.
[0054] Figure 8 Shown Figure 1 A principle block diagram of another embodiment of the power distribution circuit 1 is shown. Figure 8 The embodiment shown is Figure 7 The embodiment shown is similar, with the main difference being that when the DC output port DC1 requires six charging power packs to meet the charging power demand, if the charging power packs M2, M4, M6, M3, and M5 are all idle, the controller controls the DC contactors KM1, KM7, KM6, KM2, and KM8 to call the charging power packs M2, M4, M6, M3, and M5, so that the charging power pack M1 is charged together with the charging power packs M2, M4, M6, M3, and M5.
[0055] Similarly, when the DC output port DC1 requires seven or more charging power packages to meet the charging power demand, multiple charging power packages M2, M4, M6, M3, M5, etc. are called to charge the charging power package M1 together with multiple charging power packages M2, M4, M6, M3, M5, etc. In this way, multiple charging power packages are provided as much as possible to meet the charging demand.
[0056] Similarly, if the charging power requirement of the DC output port DC2 or the DC output port DC3 is similar to the charging power requirement of the DC output port DC1, the above logic can be used for allocation.
[0057] With such configuration, the power distribution circuit 1 of this embodiment can be flexibly allocated according to power demand, not only giving priority to allocating inherent power packages, but also allocating appropriate auxiliary power packages, and the control logic and implementation method are simple.
[0058] In the above Figures 6 to 8 In the illustrated embodiment, the inherent power packages M3 and M5 of the DC output port DC2 are originally in an idle state. When they are called by the DC output port DC1 and are in a working state, if the DC output port DC2 has a power demand, the charging power package M3 in the working state can be switched from the DC output port DC1 to the corresponding DC output port DC2. Similarly, the inherent power package M5 of the DC output port DC3 is originally in an idle state. When they are called by the DC output port DC1 and are in a working state, if the DC output port DC3 has a power demand, the charging power package M5 in the working state can be switched from the DC output port DC1 to the corresponding DC output port DC3. In this way, the inherent power package is satisfied to respond to the charging demand of this port first.
[0059] Furthermore, if the DC output port DC1 first calls multiple auxiliary power packs to charge simultaneously, and has not yet indicated that they are fully charged and the multiple auxiliary power packs are still in working condition, if the power charging demand of the DC output port DC2 or DC3 is greater than the charging power of the corresponding inherent power pack, it can only be allocated to its own inherent power pack. Other charging power packs need to wait until they are in an idle state before they can be called. In this way, they need to wait in line to meet the first-come-first-served charging demand.
[0060] Fig. 9 Shown Figure 1 The power distribution circuit 1 shown is a power distribution schematic diagram of another embodiment. Fig. 9 The embodiment shown is Figure 1 and Figure 2 The embodiment shown is similar, the main difference is that the number of charging power packs, DC output ports and DC contactors are different, the deployment logic and principle are similar, and the number relationship between DC output ports, charging power packs and DC contactors is also similar. Fig. 9 As shown, there are six DC output ports and twelve charging power packs. The number of DC output ports and charging power packs has increased accordingly, and the link between the DC output port and the charging power pack can still clearly show the coordination relationship between the DC output port and the charging power pack. Compared with the related art, the logic is simple and clear, and the number of required DC contactors is greatly reduced, the failure rate and cost are low, and no further description is given here.
[0061] In the power distribution circuit 1 of the present application, each DC output port corresponds to an inherent charging power pack and is connected to three adjacent charging power packs through a DC contactor, and then controls the DC contactors connected to the three adjacent charging power packs to close, and so on, until the output power of the DC output port meets the requirements, and the number of DC contactors required is small, which reduces the cost of the power distribution circuit 1. Compared with the related art, the power distribution circuit 1 is suitable for the scenario where the number of DC output ports is less than the number of charging power packs, can achieve full flexible power distribution, and the number of required DC contactors is reduced, the logic is simple, and the failure rate and cost are low, thereby solving the problems of high cost, high failure rate, and complex logic of the existing matrix power distribution circuit, the problem that the multi-channel series power distribution circuit cannot fully flexibly distribute power, and the multi-dimensional power distribution circuit is not suitable for the problem that the number of DC output ports is less than the number of charging module power packs.
[0062] The present application also provides a DC charging pile including a power distribution circuit 1 of any one of the above embodiments. The DC charging pile of this embodiment includes the above Figures 1 to 9 The power distribution circuit 1 shown in the embodiment, the DC charging pile can adapt to the scenario where the number of DC output ports is less than the number of charging power packs, realizing fully flexible power distribution, and the number of required DC contactors is reduced, the logic is simple, and the failure rate and cost are low.
[0063] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.
Claims
1. A power distribution circuit, characterized in that: include: Multiple charging power packs, multiple DC output ports and multiple groups of DC contactors, the multiple charging power packs are connected in parallel between an AC power supply and the multiple DC output ports, the number of the DC output ports is less than the number of the charging power packs, each of the DC output ports is connected to one of the charging power packs, the charging power pack serves as an inherent power pack corresponding to the DC output port, and each of the DC output ports is electrically connected to the charging power packs arranged adjacent to the corresponding inherent power packs and the charging power packs arranged adjacent to the inherent power packs corresponding to other DC output ports through the multiple groups of DC contactors.
2. The power distribution circuit according to claim 1, characterized in that: The multiple inherent power packs corresponding to the multiple DC output ports are arranged at intervals, and the multiple charging power packs adjacent to the multiple inherent power packs all serve as auxiliary power packs of each DC output port, and each DC output port is electrically connected to the multiple auxiliary power packs through the multiple groups of DC contactors.
3. The power distribution circuit according to claim 2, characterized in that: When the charging power demand of one of the DC output ports is not greater than the charging power of the corresponding inherent power package, the DC output port is preferentially connected to the corresponding inherent power package for charging.
4. The power distribution circuit according to claim 2, characterized in that: When the charging power demand of one of the DC output ports is greater than the charging power of the corresponding inherent power pack, and is not greater than the charging power of the inherent power pack corresponding to the DC output port plus the charging power of all the auxiliary power packs, the DC output port calls the corresponding inherent power pack, then calls at least one of the auxiliary power packs in an idle state, and controls the corresponding DC contactor to close.
5. The power distribution circuit according to claim 2, characterized in that: The power distribution circuit also includes a controller, which is electrically connected to the multiple groups of DC contactors; when the charging power demand of one of the DC output ports is greater than the charging power of the corresponding inherent power pack, and is not greater than the charging power of the inherent power pack corresponding to the DC output port plus the charging power of all the auxiliary power packs, the controller controls at least one of the DC contactors between the inherent power pack corresponding to the DC output port and at least one of the auxiliary power packs in an idle state to close, so that the inherent power pack corresponding to the DC output port and at least one of the auxiliary power packs in an idle state are charged.
6. The power distribution circuit according to claim 2, characterized in that: When the charging power demand of one of the DC output ports is greater than the charging power of the inherent power package corresponding to the DC output port plus the charging power of all the auxiliary power packages, the DC output port calls the corresponding inherent power package and all the auxiliary power packages, and then calls at least one other inherent power package in an idle state, and controls the corresponding DC contactor to close.
7. The power distribution circuit according to claim 6, characterized in that: The power distribution circuit also includes a controller, which is electrically connected to the multiple groups of DC contactors; when the charging power demand of one of the DC output ports is greater than the charging power of the inherent power pack corresponding to the DC output port plus the charging power of all the auxiliary power packs, the controller controls the multiple DC contactors arranged between the inherent power pack corresponding to the DC output port and all the auxiliary power packs to close, and controls at least one of the inherent power packs in an idle state to be connected, so that the inherent power pack corresponding to the DC output port, all the auxiliary power packs and at least one of the inherent power packs in an idle state are charged.
8. The power distribution circuit according to claim 1, characterized in that: The number of the charging power packs is at least twice the number of the DC output ports, and the number of the DC contactor groups is at least three times the number of the DC output ports.
9. The power distribution circuit according to claim 1 or 8, characterized in that: The number of the DC output ports is at least m, the number of the charging power packs is at least 2m, and the number of the DC contactor groups is at least 3m; wherein m=3*2 n-1 , n is a positive integer greater than or equal to 1.
10. A DC charging pile, characterized in that: Comprising the power distribution circuit as claimed in any one of claims 1 to 9.