PDU board, PDU box and charging pile

Abstract

The utility model provides a PDU board, a PDU box and a charging pile, the PDU board comprises a switching power supply, a plurality of positive relays, a plurality of negative relays, a control module, a first isolation driving module, a second isolation driving module, a first isolation power supply unit and a second isolation power supply unit, each positive relay is used for controlling the on-off of a positive line; each cathode relay is used for controlling the on-off of a cathode line; the control module respectively controls the positive relay and the negative relay through the two isolation driving modules, and an isolation power supply unit is connected between each of the two isolation driving modules and the switching power supply. The positive electrode circuit and the negative electrode circuit on the PDU board are relatively isolated, so that the positive electrode and the negative electrode of a vehicle battery can be prevented from forming a loop through the positive electrode circuit and the negative electrode circuit of the PDU board to cause short circuit, and the vehicle is further protected; as the low-voltage system and the high-voltage system are relatively isolated, the control module cannot be damaged even if the high voltage of the single-side relay is connected in series with the low voltage, and normal work of the PDU board is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to charging technical field, concretely relates to a PDU board, PDU box and charging stake. BACKGROUND

[0002] With the increase of the number of electric vehicles, the demand for high-power equipment in the field of charging stake is higher and higher. The power of the charging stake is getting bigger and bigger. At present, most of the high-power charging stakes adopt multiple-in and multiple-out PDU (Power Distribution Unit, power distribution unit) for power distribution. The contacts of the relay are directly arranged between the positive line or the negative line in the traditional PDU assembly, which is used to control the on-off of the line. Once the high voltage passes through the relay and enters the low-voltage control module of the control relay, it will cause the vehicle battery to form a loop through the positive line and the negative line, causing a short circuit, which will further damage the vehicle, and the high-voltage current will also cause damage to the control module. SUMMARY

[0003] The utility model discloses a PDU board, PDU box and charging stake to solve the above technical problems, the positive pole, negative pole line of PDU board is relatively isolated, can avoid the positive pole and negative pole of vehicle battery through the positive pole, negative pole line of PDU board and form a loop, cause short circuit, and further protect the vehicle, and the low-voltage system and high-voltage system are relatively isolated, and the anti-interference ability is stronger, can guarantee the normal work of PDU board.

[0004] The utility model discloses the technical scheme as follows:

[0005] A PDU board, comprising: a switching power supply, a plurality of positive pole relays, a plurality of negative pole relays, a control module, a first isolation driving module, a second isolation driving module, a first isolation power supply unit and a second isolation power supply unit, wherein each positive pole relay is used to control the on-off of the positive pole line corresponding to the positive pole relay, each negative pole relay is used to control the on-off of the negative pole line corresponding to the negative pole relay, the control module controls the deactivation and attraction of the positive pole relay and the negative pole relay through the first isolation driving module and the second isolation driving module respectively, the first isolation driving module and the switching power supply are connected with the first isolation power supply unit, and the second isolation driving module and the switching power supply are connected with the second isolation power supply unit.

[0006] In addition, the PDU board according to the utility model can also have the following additional technical features:

[0007] According to one embodiment of the utility model, each positive electrode relay is used for controlling the on-off of the positive electrode line between the positive electrode output busbar and the corresponding positive electrode input interface of the positive electrode relay, and each negative electrode relay is used for controlling the on-off of the negative electrode line between the negative electrode output busbar and the corresponding negative electrode input interface of the negative electrode relay.

[0008] According to one embodiment of the utility model, the positive electrode relay and the negative electrode relay are magnetic latching relays or monostable relays.

[0009] According to one embodiment of the utility model, a third isolated power supply unit is connected between the control module and the first isolated power supply unit, and the third isolated power supply unit is used for converting the driving power provided by the first isolated power supply unit for the first isolated driving module into a control power and providing the control power to the control module.

[0010] According to one embodiment of the utility model, the first isolated driving module comprises a first isolated driving chip, and each positive electrode relay corresponds to one first isolated driving chip.

[0011] According to one embodiment of the utility model, the utility model further comprises a communication interface and a power supply interface, the communication interface is used for transmitting external communication signals to the control module, and the power supply interface is used for connecting an external power supply and the switching power supply.

[0012] In addition, the utility model also provides a PDU box to realize the above object.

[0013] The PDU box comprises a positive electrode input busbar, a negative electrode input busbar and a plurality of groups of PDU boards as described above.

[0014] In addition, the PDU box provided by the utility model has the following additional technical features:

[0015] According to one embodiment of the utility model, the utility model further comprises a shell, and a guide rail is arranged inside the shell to enable the PDU board to be inserted into the shell along the guide rail.

[0016] According to one embodiment of the utility model, the utility model further comprises a fan, and the fan is installed on one side of the shell through a fan support.

[0017] According to one embodiment of the utility model, the side surface and the bottom of the fan support are respectively provided with epoxy plates, and the epoxy plates are provided with channels suitable for output busbars or input busbars.

[0018] In addition, the utility model provides a charging pile to realize the above object.

[0019] A charging pile comprises the PDU box as described above.

[0020] The utility model has the advantages of:

[0021] The PDU board of the utility model divides the current loop from the switching power supply into two paths, one path supplies power to the first isolated driving module through the first isolated power supply unit, and the positive electrode relay controls the positive electrode circuit under the driving of the first isolated driving module; one path supplies power to the second isolated driving module through the second isolated power supply unit, and the negative electrode relay controls the negative electrode circuit under the driving of the second isolated driving module, so that the positive electrode and the negative electrode circuit on the PDU board are relatively isolated, the positive electrode and the negative electrode of the vehicle battery cannot form a loop through the positive electrode and the negative electrode circuit of the PDU board, short circuit is avoided, and the vehicle is further protected; since the low-voltage system and the high-voltage system are relatively isolated systems, the unilateral relay cannot cause damage to the control module even if the high-voltage is connected into the low-voltage, the anti-interference capability is relatively strong, and the PDU board can work normally. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The figure is a block diagram of the PDU board of one embodiment of the utility model;

[0023] Figure 2 The figure is a structural diagram of the PDU board of one embodiment of the utility model;

[0024] Figure 3 And Figure 4 The figure is a three-dimensional structural diagram of the PDU box of one embodiment of the utility model under different viewing angles;

[0025] Figure 5 The figure is a structural diagram of the PDU box of another embodiment of the utility model. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] For example, Figure 1 And Figure 2As shown, the PDU board 100 in the embodiment of the utility model includes: switching power supply 1, a plurality of positive relays 2, a plurality of negative relays 3, control module 4, first isolation drive module 5, second isolation drive module 6, first isolation power supply unit 7 and second isolation power supply unit 8, wherein each positive relay 2 is used to control the on-off of the positive line corresponding to the positive relay 2; each negative relay 3 is used to control the on-off of the negative line corresponding to the negative relay 3; control module 4 controls the turn-off and attraction of positive relay 2 and negative relay 3 through first isolation drive module 5 and second isolation drive module 6 respectively, and first isolation power supply unit 7 is connected between first isolation drive module 5 and switching power supply 1, and second isolation power supply unit 8 is connected between second isolation drive module 6 and switching power supply 1.

[0028] It can be understood that the current loop on the PDU board 100 in the embodiment can be divided into two paths from switching power supply 1, one path supplies power to first isolation drive module 5 through first isolation power supply unit 7, so that positive relay 2 controls the positive line under the drive of first isolation drive module 5; one path supplies power to second isolation drive module 6 through second isolation power supply unit 8, so that negative relay 3 controls the negative line under the drive of second isolation drive module 6. Even if the high voltage of the single-sided relay is connected into the low voltage, since the voltage power supply loop on this side can only pass through the single-sided line, the positive line and the negative line are relatively isolated, and the positive and negative poles of the vehicle battery cannot form a loop through the positive line and the negative line on the PDU board 100, so as not to cause short circuit, thereby protecting the vehicle; since control module 4 controls positive relay 2 and negative relay 3 through first isolation drive module 5 and second isolation drive module 6 respectively, the low-voltage system and the high-voltage system on the PDU board 100 are relatively isolated systems, and the high voltage of the single-sided relay connected into the low voltage will not cause damage to control module 4, so that the anti-interference ability is relatively strong, and the normal work of the PDU board 100 is guaranteed.

[0029] As shown in the embodiment of the utility model, Figure 2 In one specific embodiment of the utility model, the positive relay 2 can be 6, and each positive relay 2 is used to control the on-off of the positive line between the positive output busbar 9 and the positive input interface 10 corresponding to the positive relay 2; the negative relay 2 can be 6, and each negative relay 3 is used to control the on-off of the negative line between the negative output busbar 11 and the negative input interface 12 corresponding to the negative relay 3. In some other embodiments of the utility model, the number of positive relays, positive input interfaces, negative relays and negative input interfaces can also be adjusted according to actual needs, and the embodiment is not limited.

[0030] In one embodiment of the utility model, the positive output busbar 9 and the negative output busbar 11 can be welded in the PDU board 100 card slot by using wave soldering, four welding notches can be arranged on the PDU board 100, and the welding bumps on the output busbar are not more than 2mm of the PDU board, so as to ensure the welding strength of the output busbar and the board.

[0031] In one embodiment of the utility model, the positive relay 2 and the negative relay 3 can be on-board relays, such as magnetic latching relays, monostable relays and the like, so as to adapt to the needs of the PDU board mounting structure, and the embodiment is not limited.

[0032] Preferably, the positive relay 2 and the negative relay 3 are both magnetic latching relays. Compared with general high-voltage relays, the magnetic latching relays have stronger anti-interference ability, do not need to be provided with redundant mechanical moving parts, have smaller size and lower cost; and the magnetic latching relays do not need to consume energy in the contact holding state, so continuous power supply driving is not needed, the coil has small heat generation, and the power consumption is small.

[0033] As shown in the figure, Figure 1 In one embodiment of the utility model, a third isolated power supply unit 13 can be connected between the control module 4 and the first isolated power supply unit 7, and the third isolated power supply unit 13 is used to convert the driving power supply provided by the first isolated power supply unit 7 for the first isolated driving module 5 into a control power supply and provide the control power supply to the control module 4.

[0034] It should be noted that the embodiment is only one power supply mode that can be selected by the control module 4, and in some other embodiments of the utility model, the third isolated power supply unit 13 can be connected between the control module 4 and the second isolated power supply unit 8, and is used to convert the driving power supply provided by the second isolated power supply unit 8 for the second isolated driving module 6 into a control power supply and provide the control power supply to the control module 4; or the control module 4 directly obtains the control power supply from the first isolated power supply unit 7 or the second isolated power supply unit 8; or the control module 4 directly obtains the control power supply from the switching power supply 1 through an isolated power supply unit, and the embodiment is not limited.

[0035] In one embodiment of the utility model, the first isolated driving module 5 can include a first isolated driving chip, each positive relay 2 corresponds to a first isolated driving chip, the second isolated driving module 6 can also include a second isolated driving chip, and each negative relay 3 corresponds to an isolated driving chip, so that the control module 4 can control the relays through a single isolated driving chip. In some other embodiments of the utility model, the first isolated driving module 5 and the second isolated driving module 6 can also be isolated driving circuits with isolated driving functions, so that the control module 4 can control the relays through the isolated driving circuits, and the embodiment is not limited.

[0036] As Figure 2 shown in the utility model one embodiment, PDU board 100 can also include: communication interface 14 and power supply interface 15, communication interface 14 is used to transmit external communication signal to control module 4, to play the role of external communication, power supply interface 15 is used to connect external power supply and switching power supply 1, to play the role of low voltage power supply. Wherein, communication interface 14 and power supply interface 15 can be two fast plug-in connectors, the embodiment does not limit.

[0037] In a specific embodiment of the utility model, switching power supply can be AC / DC switching power supply, and the AC / DC switching power supply provides 12V DC to two 12V-to-12V isolation power supplies (i.e. first isolation power supply unit, second isolation power supply unit) in the board, one 12V-to-12V isolation power supply provides power to the positive relay drive (i.e. first isolation drive module), and is stepped down to 3.3V by the third isolation power supply unit to supply power to the MCU (i.e. control module); another 12V-to-12V isolation power supply provides power to the negative relay drive (i.e. second isolation drive module), and the MCU controls the turn-off and attraction of the positive and negative relays through the isolation drive module. The MCU can also be connected to the temperature detection processing module, so that the MCU can monitor whether the PDU board 100 is within the normal working temperature range according to the temperature detected by the temperature detection processing module, to ensure the safety of work.

[0038] In addition, to achieve the above object, the utility model also proposes a PDU box.

[0039] As Figure 3 shown, the PDU box of the utility model embodiment comprises: a positive input busbar 200, a negative input busbar 300 and a plurality of PDU boards 100 as described above, the positive input busbar 200 is connected to the positive line of the power module corresponding to the positive input busbar 200 and a plurality of PDU boards 100 through the positive input interface 10 on the PDU board 100; the negative input busbar 300 is connected to the positive line of the power module corresponding to the negative input busbar 300 and a plurality of PDU boards 100 through the negative input interface 12 on the PDU board 100, and the power module is connected to one positive input busbar 200 and one negative input busbar 300 on the PDU box, so that power distribution can be realized through the PDU box.

[0040] As Figure 3As shown in the utility model, in one specific embodiment of the utility model, one PDU box can include 6 positive input busbars 200, 6 negative input busbars 300 and 5 groups of PDU plates 100, 6 positive relays and 6 negative relays are arranged on each PDU plate 100, and 6 power modules are provided for the PDU box, so that each power module corresponds to one positive input busbar and one negative input busbar, and the connection sequence of the power module and the input busbar can be any combination, and the maximum power output can be achieved.

[0041] As shown in the utility model, Figure 4 As shown in one embodiment of the utility model, the PDU box can further include a shell 400, and the shell 400 is internally provided with guide rails 500, so that the PDU plates 100 are inserted into the shell 400 along the guide rails 500, and the PDU plates 100 are conveniently and quickly installed and disassembled.

[0042] Specifically, the guide rails 500 can be arranged on the upper and lower sides of the shell and fixed in the shell 400 through a plurality of cross-slot countersunk head screws, and an upper support plate can be further installed on the top of the shell 400, and the upper support plate can be connected with the shell 400 through a plurality of open-type countersunk head blind rivets, so that when the PDU box is subsequently installed in the charging pile, the bolts of the guide rails will not scratch other parts in the charging pile, and similarly, a lower support plate can also be installed on the bottom of the shell 400 in a similar manner, and the embodiment is not limited in this regard.

[0043] In one embodiment of the utility model, the front part of the shell 400 is open, so that the code dialing and program burning work on the control board in the PDU box are facilitated.

[0044] In one embodiment of the utility model, a sheet metal side plate 600 can be further installed on the side surface of the shell 400, the sheet metal side plate 600 can be connected with the shell 400 through an open-type countersunk head blind rivet, a handle 700 can be installed on the sheet metal side plate 600, and the PDU box is conveniently disassembled and maintained in the later period.

[0045] At present, when the ordinary PDU box fails, the entire PDU needs to be disassembled and sent to the manufacturer for repair. However, in the embodiment of the utility model, when the PDU box fails, only the screws between the PDU box and the external copper bus need to be disassembled, and then the faulty PDU plate 100 is disassembled from the front part and replaced. After the repair is completed, the distribution box is reinstalled, and the charging pile power supply can be restored.

[0046] As shown in the utility model, Figure 5 As shown in one embodiment of the utility model, the PDU box can further include a fan 800, and the fan 800 is installed on one side of the shell through a fan support 900, so as to improve the heat dissipation efficiency of the PDU box. Specifically, the fan support 900 can be installed on the shell 400 through a plurality of combination screws, and when the PDU box is installed, the input busbar can be installed first, and then the fan support 900 and the fan 800 are installed.

[0047] In one embodiment of the present application, the side and bottom of the fan support 900 are respectively provided with an epoxy plate 1000, and the epoxy plate is provided with a channel suitable for output busbars or input busbars to extend out. Specifically, the epoxy plate can be installed on the fan support 900 by means of combination screws, thereby playing a role of isolation and preventing the charging pile from disturbing the centrifugal fan.

[0048] In addition, in order to achieve the above object, the present application further provides a charging pile.

[0049] The charging pile according to the embodiment of the present application comprises the PDU box as described above.

[0050] The charging pile according to the embodiment of the present application has the beneficial effects of the PDU box as described above.

[0051] In the description of the present application, the meaning of "a plurality of" is two or more than two, unless otherwise explicitly specified and limited.

[0052] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements.

[0053] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

Claims

1. A PDU board, characterized by, The PDU box comprises: a switching power supply; a plurality of positive relays, each of which is used to control the on-off of the positive line between the positive output busbar and the positive input interface corresponding to the positive relay; a plurality of negative relays, each of which is used to control the on-off of the negative line between the negative output busbar and the negative input interface corresponding to the negative relay; a control module, which controls the off and attraction of the positive relays and the negative relays through a first isolation driving module and a second isolation driving module respectively, and a first isolation power supply unit and a second isolation power supply unit are connected between the first isolation driving module and the switching power supply and between the second isolation driving module and the switching power supply.

2. The PDU board of claim 1, wherein, Each of the positive relays is used to control the on-off of the positive line between the positive output busbar and the positive input interface corresponding to the positive relay; and each of the negative relays is used to control the on-off of the negative line between the negative output busbar and the negative input interface corresponding to the negative relay.

3. The PDU board of claim 1, wherein, The positive relays and the negative relays are magnetic latching relays or monostable relays.

4. The PDU board of claim 1, wherein, A third isolation power supply unit is connected between the control module and the first isolation power supply unit, and is used to convert the driving power provided by the first isolation power supply unit for the first isolation driving module into a control power for the control module.

5. The PDU board of claim 1, wherein, Further comprising: a communication interface and a power supply interface, the communication interface is used to transmit external communication signals to the control module, and the power supply interface is used to connect an external power supply and the switching power supply.

6. A PDU box characterized in that, The PDU box comprises: a positive input busbar, a negative input busbar and a plurality of groups of PDU boards according to any one of claims 1-5, the positive input busbar is connected with the positive lines of a plurality of PDU boards through the positive input interfaces on the PDU boards, and the negative input busbar is connected with the negative lines of a plurality of PDU boards through the negative input interfaces on the PDU boards.

7. The PDU case of claim 6, wherein, Further comprising: a shell, which is internally provided with guide rails to enable the PDU boards to be inserted into the shell along the guide rails.

8. The PDU case of claim 7, wherein, Further comprising: a fan, which is installed on one side of the shell through a fan support.

9. The PDU case of claim 8, wherein, The side surface and the bottom surface of the fan support are respectively provided with epoxy plates, and the epoxy plates are provided with channels suitable for the output busbar or the input busbar to extend out.

10. A charging post, characterized by The PDU box comprises: the PDU box according to any one of claims 6-9.

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