CN110832727A - Direct current charging equipment - Google Patents
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- CN110832727A CN110832727A CN201780092846.4A CN201780092846A CN110832727A CN 110832727 A CN110832727 A CN 110832727A CN 201780092846 A CN201780092846 A CN 201780092846A CN 110832727 A CN110832727 A CN 110832727A
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Abstract
A direct current charging apparatus (1), the direct current charging apparatus (1) comprising: a signal processor (10), a switch controller (20), a plurality of power supply devices (30), and a plurality of charging guns (40); the signal processor (10) is respectively connected with the plurality of charging guns (40) and the switch controller (20), and the plurality of power supply devices (30) are connected with the plurality of charging guns (40) through the switch controller (20); the signal processor (10) generates a switch control instruction according to the working state information corresponding to the plurality of charging guns (40), and sends the switch control instruction to the switch controller (20), and the switch controller (20) adjusts the electrical connection relation between the plurality of power supply devices (30) and the plurality of charging guns (40) according to the switch control instruction. The utilization rate of the charger can be improved, and the charging current on each charging gun can be further adjusted, so that the cost of the charger is reduced.
Description
The invention relates to the field of charging devices, in particular to direct-current charging equipment.
In recent years, with the rapid development of new energy vehicles and the strong support of the national environmental protection policies such as energy conservation and consumption reduction, new energy vehicles gradually grow into the industry with the fastest development speed, and meanwhile, charging piles matched with the new energy vehicles (such as electric vehicles) are also rapidly developed correspondingly.
However, along with the popularization of new energy automobiles, especially pure electric cars, the problem of power supply for the new energy automobiles is evolved into a huge barrier for further development of the new energy automobiles. For example, taking a ground charging pile as an example, if enough electric quantity can be provided for a new energy automobile so that the new energy automobile has power resources for a long trip (i.e., coming out of the market), the problem that the country under the eye is dedicated to solve is particularly solved. In addition, because ground charging piles are limited by the examination of land and power grids, a charging mode of one electric pile and one electric pile is generally adopted, but the charging piles in the mode can be divided into an alternating current charging pile and a direct current charging pile;
for example, taking an ac charging pile installed in a parking lot of a residential area as an example, the ac charging pile usually outputs a unidirectional or three-directional ac current, but the ac current output by the on-board charger is converted into a dc current to further supply power to the on-board battery, and the charging power is usually small (e.g., 7KW or 22KW), so that the charging speed of the electric vehicle is slow.
In contrast, a dc charging pile (also referred to as an off-board charger) can directly supply dc power to the on-board battery, for example, a charging station installed beside a highway is a dc charging pile. Although the existing direct current charging pile can output large power (for example, 60KW or 200KW), the pile body of the existing direct current charging pile is large in size, and a high-power charging machine is often used for supplying power, after all, a plurality of alternating current-direct current (AC-DC) power modules are carried inside the direct current charging pile, so that the manufacturing cost is generally high. Particularly, when the charging mode of one electric pile is adopted, if there are N charging guns, N high-power chargers need to be arranged correspondingly, and the N chargers are not associated with each other and work independently.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a dc charging device, which can improve the utilization rate of a charger and adjust the charging current on a charging gun in real time to reduce the cost of the charger.
In order to solve the above technical problem, an embodiment of the present invention provides a dc charging apparatus, where the dc charging apparatus includes a signal processor, a switch controller, a plurality of power supply devices, and a plurality of charging guns;
the signal processor is respectively connected with the plurality of charging guns and the switch controller, and the plurality of power supply devices are connected with the plurality of charging guns through the switch controller;
the signal processor generates a switch control instruction according to the working state information corresponding to the plurality of charging guns and sends the switch control instruction to the switch controller, and the switch controller adjusts the electrical connection relation between the plurality of power supply devices and the plurality of charging guns according to the switch control instruction;
each power supply device in the plurality of power supply devices is a direct current charger which outputs a constant current, and the maximum current of each direct current charger is a fixed current threshold;
wherein the maximum load current of each charging gun in the plurality of charging guns is greater than or equal to the sum of the fixed current thresholds output by each power supply device.
The switch controller comprises a plurality of switch assemblies and a direct current charging bus, wherein each switch assembly comprises a first control switch, a second control switch and a third control switch;
each power supply device in the plurality of power supply devices is connected with the first end of the first control switch in each switch assembly in a one-to-one correspondence mode, and each charging gun is connected with the first end of the second control switch in each switch assembly in a one-to-one correspondence mode; the power supply device is connected with the first end of the first control switch, and the charging gun is connected with the first end of the second control switch;
in any one switch assembly, the second end of the first control switch is connected with the second end of the second control switch, the first end of the third control switch is connected with the first end of the first control switch, the second end of the third control switch is connected with the first end of the second control switch, and the second end of the first control switch is connected with the direct-current charging bus.
Optionally, when the signal processor receives a charging request instruction sent by a target charging gun, the signal processor detects a ratio of the number of the charging guns in an idle state to the number of the charging guns in an occupied state, generates a fast charging instruction corresponding to the target charging gun when the ratio meets a fast charging condition, and sends the fast charging instruction to the switch controller, and the switch controller connects at least two power supply devices to the target charging gun according to the fast charging instruction so as to perform fast charging operation on the target charging gun;
the switch controller determines a first power supply device and at least one second power supply device to supply power to the target charging gun according to the quick charging instruction, and adjusts switch assemblies respectively corresponding to the second power supply devices according to the quick charging instruction so as to disconnect the connection relation between the second power supply devices and the corresponding charging guns and establish the connection relation between the second power supply devices and the direct-current charging bus;
the switch controller adjusts a switch component corresponding to the first power supply device according to the quick charging instruction so as to establish a connection relation between the first power supply device and the target charging gun and establish a connection relation between the first power supply device and the direct-current charging bus; the first power supply device is connected with the target charging gun through one switch assembly, and the second power supply device is connected with the target charging gun through two switch assemblies;
the maximum load current of the second control switch in each switch assembly is greater than or equal to the sum of fixed current thresholds output by each power supply device;
the maximum load current of the charging bus is larger than or equal to the sum of fixed current thresholds output by the power supply devices.
Optionally, when the signal processor receives a charging request instruction sent by a target charging gun, the signal processor detects a ratio of the number of the charging guns in an idle state to the number of the charging guns in an occupied state, generates a slow charging instruction corresponding to the target charging gun when the ratio meets a slow charging condition, and sends the slow charging instruction to the switch controller, and the switch controller connects a power supply device corresponding to the target charging gun to perform a slow charging operation on the target charging gun;
the switch controller adjusts a switch component corresponding to the target charging gun according to the slow charging instruction so as to disconnect the connection relation between a power supply device corresponding to the target charging gun and the direct-current charging bus and establish the connection relation between the power supply device corresponding to the target charging gun and the target charging gun.
In the invention, the signal processor, the switch controller, the plurality of power supply devices and the plurality of charging guns form direct current charging equipment, the signal processor can generate a switch control instruction according to working state information corresponding to the plurality of charging guns and send the switch control instruction to the switch controller, and the switch controller adjusts the electrical connection relation between the plurality of power supply devices and the plurality of charging guns according to the switch control instruction, so that the charging current on each charging gun can be adjusted, the utilization rate of the charger is improved, and the cost of the charger is reduced.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dc charging device according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another dc charging apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a switch assembly according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another dc charging device according to an embodiment of the present invention.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The following are detailed below.
Fig. 1 is a schematic structural diagram of a dc charging device according to an embodiment of the present invention. As shown in fig. 1, the dc charging apparatus 1 includes: a signal processor 10, a switch controller 20, a plurality of power supply devices 30, and a plurality of charging guns 40;
the signal processor 10 is connected to the plurality of charging guns 40 and the switch controller 20, respectively, and the plurality of power supply devices 30 are connected to the plurality of charging guns 40 through the switch controller 20;
the signal processor 10 generates a switch control command according to the working state information corresponding to the plurality of charging guns 40, and transmits the switch control command to the switch controller 20, and the switch controller 20 adjusts the electrical connection relationship between the plurality of power supply devices 30 and the plurality of charging guns 40 according to the switch control command;
specifically, the signal processor 10 may detect, when receiving a charging request instruction sent by a target charging gun (the target charging gun may be any one charging gun 40 of the plurality of charging guns 40 in the embodiment corresponding to fig. 1), operating state information corresponding to the plurality of charging guns 40 according to the charging request instruction, further generate a fast charging instruction corresponding to the target charging gun, and send the fast charging instruction to the switch controller 20, so that the switch controller 20 selects at least two power supply devices 30 among the plurality of power supply devices 30 according to the fast charging instruction to connect to the target charging gun, so as to perform a fast charging operation on the target charging gun;
optionally, when receiving a charging request instruction sent by a target charging gun, the signal processor 10 may further detect operating state information corresponding to each of the plurality of charging guns 40 according to the charging request instruction, further generate a slow charging instruction corresponding to the target charging gun, and send the slow charging instruction to the switch controller 20, so that the switch controller adjusts an electrical connection relationship between the plurality of power supply devices 30 and the plurality of charging guns 40 according to the slow charging instruction, so as to perform a slow charging operation on the target charging gun.
In view of this, the dc charging device 1 may be applied to a ground charging pile for providing power resources for a new energy vehicle, so as to further control the switch controller 20 to implement dynamic power distribution according to the working state information corresponding to each charging gun 40 in practical application, and further form a group-type ground power supply device, so as to adjust the charging current on the target charging gun in real time, so as to improve the utilization rate of each low-power charger in each power supply device 30.
As can be seen, in the present invention, the signal processor 10 in the dc charging apparatus 1 is connected to the plurality of charging guns 40 and the switch controller 20, respectively, and the plurality of power supply devices 30 are connected to the plurality of charging guns 40 through the switch controller 20; in addition, the signal processor firstly generates a switch control instruction according to the working state information corresponding to the plurality of charging guns; then, the signal processor 10 transmits the switch control instruction to the switch controller 20; finally, the switch controller 20 adjusts the electrical connection relationship between the plurality of power supply devices 30 and the plurality of charging guns 40 according to the switch control instruction. It can be seen that, when the signal processor 10 receives a charging request instruction sent by a target charging gun, a fast charging instruction or a slow charging instruction corresponding to the target charging gun may be further generated according to the working state information corresponding to the plurality of charging guns 40, and when the switch controller 20 receives the fast charging instruction, at least two power supply devices 30 may be selected from the plurality of power supply devices 30 to be connected to the target charging gun, so as to perform a fast charging operation on the target charging gun; optionally, the switch controller 20 may further connect the power supply devices 30 in the dc charging apparatus 1 to the charging guns 40 one-to-one when receiving the slow charging instruction, so as to perform a slow charging operation on a target charging gun, thereby improving a utilization rate of the charger, and further adjusting the charging current of each charging gun in real time according to the operating state information of each charging gun, so as to reduce the cost of the charger.
Further, please refer to fig. 2, which is a schematic structural diagram of another dc charging apparatus according to an embodiment of the present invention. As shown in fig. 2, the dc charging apparatus includes the signal processor 10, the switch controller 20, a plurality of power supply devices 30, and a plurality of charging guns 40 in the embodiment corresponding to fig. 1; wherein the switch controller 20 includes: a plurality of switch modules 201 and a dc charging bus 202;
in any one of the switch assemblies 201, the switch assembly includes a first control switch, a second control switch, and a third control switch; specifically, please refer to fig. 3, which is a schematic structural diagram of a switch assembly according to an embodiment of the present invention. As shown in fig. 3, the switch assembly 201 includes a first control switch 2011, a second control switch 2012 and a third control switch 2013;
as can be seen from fig. 2 and 3, each of the plurality of power supply devices 30 is connected to the first end of the first control switch 2011 of each switch module 201 in a one-to-one correspondence manner, and each of the charging guns 40 is connected to the first end of the second control switch 2012 of each switch module 201 in a one-to-one correspondence manner; wherein, a power supply device 30 is connected with a first end of a first control switch 2011, and a charging gun 40 is connected with a first end of a second control switch 2012;
in addition, in any switch assembly 201, the second end of the first control switch 2011 is connected to the second end of the second control switch 2012, the first end of the third control switch 2013 is connected to the first end of the first control switch 2011, the second end of the third control switch 2013 is connected to the first end of the second control switch 2012, and the second end of the first control switch 2011 is connected to the dc charging bus 202.
When the signal processor 10 receives a charging request instruction sent by a target charging gun, the signal processor 10 detects a ratio of the number of the charging guns in an idle state to the number of the charging guns in an occupied state, generates a fast charging instruction corresponding to the target charging gun when the ratio meets a fast charging condition, and sends the fast charging instruction to the switch controller 20, and the switch controller 20 connects at least two power supply devices 30 to the target charging gun according to the fast charging instruction to perform fast charging operation on the target charging gun;
further, the switch controller 20 may determine, according to the fast charging instruction, that a first power supply device and at least one second power supply device supply power to the target charging gun, and the switch controller 20 adjusts, according to the fast charging instruction, the switch assemblies 201 corresponding to the second power supply devices, respectively, so as to disconnect the connection relationship between the second power supply devices and the corresponding charging gun 40, and establish the connection relationship between the second power supply devices and the dc charging bus 202;
further, the switch controller 20 may adjust the switch component 201 corresponding to the first power supply device according to the fast charging instruction, so as to establish a connection relationship between the first power supply device and the target charging gun, and establish a connection relationship between the first power supply device and the dc charging bus 202;
the first power supply device is a power supply device 30 connected with the target charging gun through one switch assembly 201, and the second power supply device is a power supply device 30 connected with the target charging gun through two switch assemblies 201.
Optionally, the signal processor 10 may further detect a ratio of the number of charging guns in an idle state to the number of charging guns in an occupied state when receiving a charging request instruction sent by a target charging gun, generate a slow charging instruction corresponding to the target charging gun when the ratio satisfies a slow charging condition, and send the slow charging instruction to the switch controller 20, where the switch controller 20 connects the power supply device 30 corresponding to the target charging gun to perform a slow charging operation on the target charging gun;
further, the switch controller 20 adjusts the switch component 201 corresponding to the target charging gun according to the slow charging instruction, so as to disconnect the connection relationship between the power supply device 30 corresponding to the target charging gun and the dc charging bus 202, and establish the connection relationship between the power supply device 30 corresponding to the target charging gun and the target charging gun.
Each power supply device 30 is a dc charger outputting a constant current, and the maximum current of each dc charger is a fixed current threshold;
wherein, the maximum load current of the second control switch 2012 in each switch assembly 201 is greater than or equal to the sum of the fixed current thresholds output by each power supply device 30; therefore, the second control switch 2012 can be prevented from being damaged due to the excessive current.
Wherein, the maximum load current of the dc charging bus 202 is greater than or equal to the sum of the fixed current thresholds output by the power supply devices 30; therefore, the phenomenon that the direct current charging bus 202 is damaged due to the excessive current provided by the plurality of power supply devices 30 can be avoided.
The maximum load current of each charging gun 40 in the plurality of charging guns 40 is greater than or equal to the sum of the fixed current thresholds output by each power supply device 30, so that when the plurality of power supply devices 30 are simultaneously connected to a single charging gun 40 to supply power, the phenomenon of damage caused by excessive current is avoided.
For example, please refer to fig. 4, which is a schematic structural diagram of another dc charging apparatus according to an embodiment of the present invention. As shown in fig. 4, each power supply device is connected to each charging gun through a switch controller, and the number of each power supply device and each charging gun is in a one-to-one mode, that is, Na power supply devices correspond to Nb charging guns. In fig. 4, the charging device specifically includes a plurality of power supply devices 30, a plurality of charging guns 40, a dc charging bus 202, and a plurality of switch assemblies 201; wherein, the Nth switch module 201 includes a first control switch KN1Second control switch KN2Third control switch KN3(ii) a For example, the first switch assembly 201 includes a first control switch K11Second control switch K12Third control switch K13I.e. each switch module 201 can use Ki1Denotes a first control switch, Ki2Denotes a second control switch, Ki3A third control switch is shown, (where i ═ 1, 2 …, N), and accordingly, in fig. 4, each of the plurality of power supply devices 30 may be represented by ia power supply devices, and each of the plurality of charging guns 40 may be represented by ib charging guns.
For example, when the maximum reference number N of the switch assembly 201 corresponding to each charging gun 40 is 5 and it is detected that the operating state information of 5 charging guns (1b charging gun, 2b charging gun, 3b charging gun, 4b charging gun, 5b charging gun) are all in the occupied state, a slow charging command corresponding to the 5 charging guns may be generated and sent to the switch controller 20 including the 5 switch assemblies 201; subsequently, the switch controller 20 will adjust the switch assemblies 201 corresponding to the 5 charging guns respectively, i.e. disconnect the power supply devices (1a power supply device, 2a power supply device, 3a power supply device, 4a power supply device, 5a power supply device) corresponding to the target charging gun (the 5 charging guns) from the dc charging bus202 such that K isi1(i ═ 1, 2, 3, 4, 5) the level signal is equal to zero, i.e. the first control switch is opened, and the current signal on the dc charging bus is zero; and further establishing a connection relationship between the power supply devices corresponding to the 5 charging guns and the target charging gun so that K is equal to Ki3The level signals on (i ═ 1, 2, 3, 4, 5) are all 1, i.e. the third control switch is closed. It can be seen that 5 power supply devices in the dc power supply apparatus can be respectively connected to 5 charging guns one by one through corresponding 5 switch assemblies.
For another example, also taking the structural diagrams corresponding to fig. 2 and 4 as examples, each switch module 201 includes a first control switch (K)i1) And a second control switch (K)i2) And a third control switch (K)i3) Wherein i is the number of each control switch in the corresponding switch assembly 201 (i.e. i is 1, 2, 3, 4, 5), when the signal processor 10 in the embodiment corresponding to fig. 2 receives a charging request command sent by a target charging gun (e.g. 1b charging gun), the ratio of the number of charging guns in the idle state (4) to the number of charging guns in the occupied state (1) may be checked according to the charging request sent by the 1b charging gun. Since the number of charging guns that are idle is 4 times the number of charging guns that are occupied. Therefore, the signal processor 10 may determine that the ratio satisfies a fast charging condition (that is, the ratio of the number of charging guns in the idle state to the number of charging guns in the occupied state is not zero), and then the signal processor 10 may further generate a fast charging command corresponding to the 1b charging gun, and send the fast charging command corresponding to the 1b charging gun to the switch controller 20, so that the switch controller 20 may synchronously connect the idle 4 power supply devices (2a power supply device, 3a power supply device, 4a power supply device, 5a power supply device) and the power supply device (1a) corresponding to the 1b charging gun according to the switch command, so as to perform a fast charging operation at a speed of 5 times for the 1b charging gun.
However, when the 1b charging gun is subjected to a fast charging operation, the switch processor 20 may further adjust the switch assemblies 201 corresponding to the second power supply devices (specifically, the 2a power supply device, the 3a power supply device, the 4a power supply device, and the 5a power supply device) according to the fast charging instruction, so as to further disconnect the connection relationship between the four power supply devices and the corresponding charging gun, and establish the connection relationship between the four power supply devices and the dc charging bus 202, that is, the working states corresponding to the second control switch and the third control switch that have a connection relationship with the idle 4 charging guns are adjusted to be disconnected, and the first control switches in the switch assemblies that have a connection relationship with the charging bus are all in a closed state; in addition, the switch controller 20 may further adjust the switch component 201 corresponding to the first power supply device (1a power supply device), and establish a connection relationship between the 1a power supply device and the dc charging bus 202. Further, please refer to table 1, which shows the switch connection attribute corresponding to each switch component 201 in the power supply device;
| each power supply device | First control switch | Second control switch | Third control switch | Each charging gun |
| 1a power supply device | K11＝1 | K12＝1 | K13＝0 | 1b charging gun |
| 2a supply ofElectrical device | K21＝1 | K22＝0 | K23＝0 | 2b charging gun |
| 3a power supply device | K31＝1 | K32＝0 | K33＝0 | 3b charging gun |
| 4a power supply device | K41＝1 | K42＝0 | K23＝0 | 4b charging gun |
| 5a power supply device | K51＝1 | K52＝0 | K53＝0 | 5b charging gun |
TABLE 1
As shown in table 1, when the signal processor 10 sends the fast charging command to the switch controller 20, the switch processor 20 may adjust the switch modules 201 corresponding to the second power supply devices (idle 4 power supply devices) according to the fast charging command, that is, the level signals of the first control switches corresponding to the 4 idle power supply devices are all 1, that is, K is provided21＝1,K31＝1,K41＝1,K 511 is ═ 1; in addition, the level signal on each second control switch is 0, namely K22＝0，K32＝0，K42＝0，K520 and the level signal on each third control switch is 0, i.e. K23＝0，K23＝0，K23＝0，K23＝0。
Meanwhile, the switch controller 20 also adjusts the switch component 201 corresponding to the first power supply device (1a power supply device) according to the fast charging instruction, that is, the level signal on the first control switch corresponding to the 1a power supply device is 1, that is, K 111 and the level signal on the second control switch is 1, i.e. K 121 and the level signal K on the third control switch130. Therefore, the switch controller 20 synchronously connects the idle 4 power supply devices (2a power supply device, 3a power supply device, 4a power supply device, 5a power supply device) and the power supply device (1a) corresponding to the 1b charging gun according to the switch command, so as to perform the fast charging operation of 5 times speed on the target charging gun.
It can be seen that, when Na power supply devices are used to supply power to Nb charging guns, if the ratio of the number of the charging guns in the idle state to the number of the charging guns in the occupied state is not zero, for example, the ratio is an integer multiple D, the signal processor may generate a fast charging instruction corresponding to the target charging gun, and send the fast charging instruction to the switch controller 20, and the switch controller 20 may adjust the closing and opening attributes of the corresponding switch assembly 201, and may further perform (D +1) -fold fast charging on each charging gun in the occupied state, at this time, each power supply device is a low-power charger, and each low-power charger may perform fast charging operation on the target charging gun through the dc charging bus 202, specifically, please refer to the control condition of the switch controller 20 given in table 1 on the internal multiple switch assemblies 201, the description will not be continued.
For another example, still taking the structural diagram given in fig. 4 as an example, when 5 power supply devices (1a power supply device, 2a power supply device, 3a power supply device, 4a power supply device, and 5a power supply device) in the dc power supply apparatus 1 are respectively connected to 5 charging guns through corresponding switch assemblies 201, and a ratio between the number of charging guns in the idle state and the charging guns in the occupied state is not zero, that is, the ratio still satisfies the fast charging condition, but the ratio is not an integer multiple (for example, when there are 2 idle charging guns and 3 occupied charging guns), at this time, the signal processor 10 may receive the charging instruction sent by the target charging guns (1b charging guns, 3b charging guns, and 5b charging guns), and may control the switch controller 20 to perform 2-time charging on the partial charging guns (for example, 1b charging guns and 3b charging guns are charged by using the 1a power supply device and 2a power supply device) (for performing the 1b charging on the 1b charging guns by using the 1a power supply device and 2a power supply device) Electrically, and the 3a power supply device and the 4a power supply device are used for performing double-speed charging on the 3b charging gun), and when the electric quantity of the electric vehicle connected with the 1b and the 3b is full, the switch controller 20 can further use the 1a power supply device and the 3a power supply device corresponding to the 1b charging gun and the 3b charging gun as a second power supply device, at this time, the signal processor 10 can further generate a fast charging instruction for the 5b charging gun when the other 4 charging guns are in an idle state and the 5b charging gun is in an occupied state, so as to further perform fast charging operation on the 5b charging gun; for the double-speed charging of the 5b charging gun, further refer to the switch connection attributes corresponding to the switch components in table 1, which is not described herein again.
As can be seen, in the present invention, the signal processor 10 in the dc charging apparatus 1 is connected to the plurality of charging guns 40 and the switch controller 20, respectively, and the plurality of power supply devices 30 are connected to the plurality of charging guns 40 through the switch controller 20; in addition, the signal processor 10 first generates a switch control command according to the operating state information corresponding to the plurality of charging guns 40; then, the signal processor 10 transmits the switch control instruction to the switch controller 20; finally, the switch controller 20 adjusts the electrical connection relationship between the plurality of power supply devices 30 and the plurality of charging guns 40 according to the switch control instruction. It can be seen that, when the signal processor 10 receives a charging request instruction sent by a target charging gun, the ratio between the number of chargers in an idle state in the dc charging device 1 and the number of chargers in an occupied state may be further detected; if the ratio is zero, it is determined that a slow charging condition is satisfied, and therefore, the charging devices 30 in the dc charging apparatus 1 may be connected to the charging guns 40 one-to-one to satisfy a target charging gun operation; optionally, if the ratio is not zero, it is determined that a fast charging condition is satisfied, and therefore, the switch controller 20 may connect at least two power supply devices 30 to the target charging gun to perform a fast charging operation on the target charging gun, so as to improve a utilization rate of the charger, and further adjust a charging current on each charging gun according to the working state information of each charging gun, so as to reduce a cost of the charger.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above can be implemented by a computer program, which can be stored in a computer-readable storage medium, and when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (10)
- A DC charging apparatus, comprising a signal processor, a switch controller, a plurality of power supply devices and a plurality of charging guns;the signal processor is respectively connected with the plurality of charging guns and the switch controller, and the plurality of power supply devices are connected with the plurality of charging guns through the switch controller;the signal processor generates a switch control instruction according to the working state information corresponding to the plurality of charging guns and sends the switch control instruction to the switch controller, and the switch controller adjusts the electrical connection relation between the plurality of power supply devices and the plurality of charging guns according to the switch control instruction.
- The dc charging apparatus of claim 1, wherein the switch controller comprises a plurality of switch assemblies and a dc charging bus, the switch assemblies comprising a first control switch, a second control switch, a third control switch;each power supply device in the plurality of power supply devices is connected with the first end of the first control switch in each switch assembly in a one-to-one correspondence mode, and each charging gun is connected with the first end of the second control switch in each switch assembly in a one-to-one correspondence mode; the power supply device is connected with the first end of the first control switch, and the charging gun is connected with the first end of the second control switch;in any one switch assembly, the second end of the first control switch is connected with the second end of the second control switch, the first end of the third control switch is connected with the first end of the first control switch, the second end of the third control switch is connected with the first end of the second control switch, and the second end of the first control switch is connected with the direct-current charging bus.
- The direct-current charging equipment according to claim 1, wherein when the signal processor receives a charging request instruction sent by a target charging gun, the signal processor detects a ratio of the number of the charging guns in an idle state to the number of the charging guns in an occupied state, generates a fast charging instruction corresponding to the target charging gun when the ratio satisfies a fast charging condition, and sends the fast charging instruction to the switch controller, and the switch controller connects at least two power supply devices to the target charging gun according to the fast charging instruction so as to perform fast charging operation on the target charging gun.
- The DC charging apparatus according to claim 3,the switch controller determines a first power supply device and at least one second power supply device to supply power to the target charging gun according to the quick charging instruction, and adjusts switch assemblies respectively corresponding to the second power supply devices according to the quick charging instruction so as to disconnect the connection relation between the second power supply devices and the corresponding charging guns and establish the connection relation between the second power supply devices and the direct-current charging bus;the switch controller adjusts a switch component corresponding to the first power supply device according to the quick charging instruction so as to establish a connection relation between the first power supply device and the target charging gun and establish a connection relation between the first power supply device and the direct-current charging bus; the first power supply device is connected with the target charging gun through one switch assembly, and the second power supply device is connected with the target charging gun through two switch assemblies.
- The direct current charging apparatus according to claim 1,when the signal processor receives a charging request instruction sent by a target charging gun, the signal processor detects the ratio of the number of the charging guns in an idle state to the number of the charging guns in an occupied state, generates a slow charging instruction corresponding to the target charging gun when the ratio meets a slow charging condition, and sends the slow charging instruction to the switch controller, and the switch controller connects a power supply device corresponding to the target charging gun to perform slow charging operation on the target charging gun.
- The DC charging apparatus according to claim 5,and the switch controller adjusts a switch component corresponding to the target charging gun according to the slow charging instruction so as to disconnect the connection relation between the power supply device corresponding to the target charging gun and the direct-current charging bus and establish the connection relation between the power supply device corresponding to the target charging gun and the target charging gun.
- The direct-current charging equipment according to any one of claims 1 to 6, wherein each power supply device is a direct-current charger with constant-current output, and the maximum current of each direct-current charger is a fixed current threshold.
- The dc charging apparatus of claim 2, wherein the maximum load current of the second control switch in each switch assembly is greater than or equal to the sum of the fixed current thresholds output by each power supply device.
- The dc charging apparatus of claim 2, wherein the maximum load current of the charging bus is greater than or equal to the sum of the fixed current thresholds output by the power supplies.
- The dc charging apparatus of claim 1, wherein a maximum load current of each charging gun of the plurality of charging guns is greater than or equal to a sum of fixed current thresholds output by the respective power supply devices.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/CN2017/099006 WO2019037072A1 (en) | 2017-08-25 | 2017-08-25 | Direct current charging device |
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| CN110832727A true CN110832727A (en) | 2020-02-21 |
| CN110832727B CN110832727B (en) | 2022-01-18 |
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| CN111071095A (en) * | 2020-01-20 | 2020-04-28 | 重庆国翰能源发展有限公司 | Charging pile interconnection system |
| CN114274819B (en) * | 2020-09-28 | 2024-04-16 | 比亚迪股份有限公司 | Vehicle, charging device, and computer-readable storage medium |
| CN113829937B (en) * | 2021-09-01 | 2023-08-25 | 深圳英飞源技术有限公司 | Multi-gun charging pile charging control method, charging pile and storage medium |
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| CN110832727B (en) | 2022-01-18 |
| WO2019037072A1 (en) | 2019-02-28 |
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