CN216069682U

CN216069682U - Power cabinet system and charging system for mobile charging pile

Info

Publication number: CN216069682U
Application number: CN202122914956.0U
Authority: CN
Inventors: 魏文深; 鲁斌
Original assignee: Xiamen Shenlan Power Technology Co ltd
Current assignee: Xiamen Shenlan Power Technology Co ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-03-18
Anticipated expiration: 2031-11-25

Abstract

The utility model provides a power cabinet system and a charging system for a mobile charging pile, which comprise an output circuit, wherein the output circuit is provided with a shunt coupled to a charging input end; the metering module is coupled to the current divider to detect the current value of the output circuit and meter the electric quantity of the output circuit according to the current value of the output circuit, and then the metering module is coupled to the main control board; the main control board is configured to feed back the electric quantity of the output circuit to the charging input end in real time. The utility model realizes that the charging system used for the mobile charging pile continuously and stably obtains the electric quantity from the fixed charging pile under the controlled state of the fixed charging pile.

Description

Power cabinet system and charging system for mobile charging pile

Technical Field

The utility model relates to the technical field of charging piles, in particular to a power cabinet system and a charging system for a mobile charging pile.

Background

The new energy automobile comes along with the rapid development of the new energy automobile, the charging problem comes along with the new energy automobile, and the new energy automobile charging pile comes out to solve the problem. The charging pile in the current market is designed according to national standards, has a standard charging interface, is divided into a direct current charging pile and an alternating current charging pile, is high in charging speed, and can shorten the charging time and well solve the pain of new energy automobile users.

Have a large amount of fixed charging stake on the market, if the removal fills electric pile and can follow fixed charging stake and continuously get the electric problem of charging that just can solve the removal and fill electric pile. In prior art, fixed charging stake can only charge for the car, and fixed charging stake charges for the vehicle through the attribute of discernment vehicle, and any removal charging stake except the vehicle all can not make fixed charging stake be under controlled state and continuously stably acquire the electric quantity from fixed charging stake promptly.

Therefore, a power cabinet system capable of enabling the fixed charging pile to be in a controlled state and continuously and stably taking power from the fixed charging pile and a charging system for the mobile charging pile are needed to be solved.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems in the prior art, the utility model provides a power cabinet system and a charging system for a mobile charging pile.

In a first aspect, the present invention provides a power cabinet system configured to be coupled to a stationary charging post via a charging input, comprising:

the output circuit is provided with a shunt which is coupled to the charging input end;

the metering module is coupled to the current divider to detect the current value of the output circuit and meter the electric quantity of the output circuit according to the current value of the output circuit, and then the metering module is coupled to the main control board;

the main control board is configured to feed back the electric quantity of the output circuit to the charging input end in real time. The metering module is used for simulating the state change of the automobile battery capacity (SOC) through the main control board control, and feeding back to the fixed charging pile through the main control board so as to prevent the fixed charging pile from being disconnected due to misjudgment of automobile battery faults and continue to take electricity from the fixed charging pile.

Further, the charging circuit comprises a current dummy load circuit, a dummy load in the current dummy load circuit and the output circuit are coupled to the charging input end in parallel, and the main control board is configured to switch on the current dummy load circuit when detecting that the current value of the output circuit is smaller than a first set current value I so as to enable the current of the output circuit to be larger than the first set current value I, and switch off the current dummy load circuit otherwise.

In the charging process, the metering module used for simulating the capacity of the automobile battery has a first set current value I (namely a cut-off current value) as the automobile battery, in the normal automobile charging process, after the current value of the output circuit reaches the set current value, the fixed charging pile stops charging, the current dummy load is used for loading the fixed charging pile to the charging input end and is connected to increase the current of the main loop, so that the fixed charging pile is cheated to mistakenly assume that the current of the output circuit detected by the metering module used for simulating the capacity of the automobile battery is larger than the first set current value I (namely the cut-off current value), and the power cabinet system can obtain electric energy from the fixed charging pile all the time.

Further, the first set current value I ranges from 0A < I < 3A.

Further, the charging device further comprises a voltage dummy load circuit, the voltage dummy load circuit comprises a first inverter and a rectifying plate, the charging input end comprises a power line end and a low-voltage auxiliary power line end, the input end of the first inverter is connected to the low-voltage auxiliary power line end, the output end of the first inverter is connected with the input end of the rectifying plate, and the output end of the rectifying plate is connected to the power line end to provide initial voltage for starting of the fixed charging pile. The voltage dummy load circuit is used for simulating the initial voltage of the automobile battery and loading the initial voltage to the charging input end, so that the fixed charging pile starts a charging function.

Further, the input voltage of the low-voltage auxiliary power supply end is 12V, and the input voltage of the power supply end ranges from 200V to 750V.

Further, the main control board is configured to respond to the starting of the charging function of the fixed charging pile, cut off the voltage dummy load circuit, send a constant current charging demand message to enable the fixed charging pile to work in a constant current mode of a second set current, and send a constant voltage charging demand message to the fixed charging pile to control the fixed charging pile to work in a constant voltage mode of a first set voltage after the main control board detects that the voltage of the charging input end reaches the first set voltage and controls the output circuit to be switched on. The main control board is configured to simulate the charging state of the battery, firstly request a constant-current charging mode, and when a set voltage value is reached, request a constant-voltage charging mode, wherein the constant-voltage charging function is to better protect the battery.

Further, the range of the first setting voltage is 200-400V.

Furthermore, the output circuit also comprises a second inverter, the second inverter is connected to the front end of the shunt in parallel, and the main control board controls the on-off of the branch where the shunt is located. The second inverter is arranged on the output circuit, so that the direct current or the alternating current can be selected and output according to actual requirements.

Further, a direct current breaker for protecting the safety of the system is arranged between the charging input end and the output circuit.

In a second aspect, the utility model provides a charging system for a mobile charging pile, which includes the power cabinet system of the first aspect and a plurality of charging cabinets, wherein the power cabinet system is connected with the plurality of charging cabinets.

Drawings

The accompanying drawings are included to provide a further understanding of the embodiments and are incorporated in and constitute a part of this specification. The drawings illustrate embodiments and together with the description serve to explain the principles of the utility model. Other embodiments and many of the intended advantages of embodiments will be readily appreciated as they become better understood by reference to the following detailed description. Other features, objects and advantages of the present application will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings in which:

FIG. 1 is a functional block diagram of a power cabinet system of a particular embodiment of the present application;

FIG. 2 is a control circuit schematic of the power cabinet system of an embodiment of the present application;

FIG. 3 is a schematic diagram of an output circuit of the power cabinet system of an exemplary embodiment of the present application;

FIG. 4 is a voltage dummy load circuit schematic of the power cabinet system of an exemplary embodiment of the present application;

FIG. 5 is a schematic diagram of a current dummy load circuit of the power cabinet system of an embodiment of the present application.

Reference numerals: 100-a charging input; 101-mains terminal; 102-low voltage auxiliary power supply terminal; 103-a communication terminal; 200-a control circuit; 201-a main control board; 202-a metering module; 300-an output circuit; 301-a shunt; 302-a second inverter; 400-voltage dummy load circuit; 401-a first inverter; 402-a rectifying plate; 403-a contactor; 500-current dummy load circuit, R1/R2/R3-dummy load.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the utility model, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present invention. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

Referring to fig. 1, fig. 1 is a schematic block diagram of a power cabinet system, including: an output circuit 300, the output circuit 300 having a current divider 301 coupled to the charging input terminal 100; a dc breaker for protecting the safety of the system is provided between the charging input terminal 100 and the output circuit 300. Wherein, charging input 100 is the rifle that charges of connecting fixed electric pile.

A voltage dummy load circuit 400 configured to simulate an initial voltage of the vehicle battery and coupled to the charging input terminal 100 to initiate a charging function of the dc charging post. An output circuit 300 configured to output the current obtained from the charging input terminal 100 in response to the start of the charging function of the dc charging post. A current dummy load circuit 500, configured to be coupled to the charging input 100, regulates the current of the output circuit 300 based on the control of the control circuit 200.

A control circuit 200 configured to simulate a change in state of capacity (SOC) of the vehicle battery by detecting a voltage and a current of the output circuit 300 and to feed back the change in state of capacity of the battery to the charging input terminal 100; and, controlling the current dummy load circuit 500 to be turned on and off, adjusting the current of the output circuit 300, and feeding back the detected current value of the output circuit 300 to the charging input terminal 100.

Referring to fig. 2, fig. 2 is a schematic diagram of a control circuit 200 of a power cabinet system according to an embodiment, where the control circuit 200 includes a metering module 202 and a main control board 201, and the metering module 202 is coupled to the main control board 201; the metering module 202 is used for simulating the change of the automobile battery capacity state (soc) and feeding back to the fixed charging pile through the main control board 201 so as to prevent the fixed charging pile from being disconnected due to misjudgment of the automobile battery fault and continue to take electricity from the fixed charging pile. Because fixed charging pile can judge the change that the battery charges, if do not change, if the battery fills not fully, fixed charging pile can judge that it just fills not fully with the fault, in order to avoid fixed charging pile's fault judgement, realize the control to electric current, voltage through the module, main control board 201 sends the change signal to fixed charging pile through the communication, then feeds back to fixed charging pile, and the electric quantity of transmission fixed charging pile is at the message that changes.

Referring to fig. 3, fig. 3 is a schematic diagram of an output circuit 300 of the power cabinet system, wherein the output circuit 300 is provided with a current divider 301 coupled to the charging input terminal 100; the metering module 202 is coupled to the shunt 301 to detect a current value of the output circuit 300 and meter the electric quantity of the output circuit 300 according to the current value of the output circuit 300, so as to be coupled to the main control board 201; the output circuit 300 further includes a second inverter 302, the second inverter 302 is connected to the front end of the shunt 301 in parallel, and the main control board 201 controls on/off of the branch where the shunt 301 is located. The output circuit 300 is provided with the second inverter 302, which is favorable for selecting the output to be direct current or alternating current according to actual needs. The metering module 202 and the main control board 201 realize the control of the current and the voltage of the output circuit 300, and then feed back to the fixed charging pile to simulate the change state of the automobile battery.

Preferably, the second inverter 302 is a 310V to 220V second inverter 302. Because still include devices such as fan, lighting apparatus in the removal stake of charging, need use the alternating current of commonly used 220V. The preferred dc power of the output circuit 300 is 310V.

Referring to fig. 4, fig. 4 is a schematic diagram of a voltage dummy load circuit 400 of a power cabinet system according to an embodiment, the voltage dummy load circuit 400 includes a first inverter 401 and a rectifying board 402, the charging input terminal 100 includes a power line terminal 101 and a low-voltage auxiliary power line terminal 102, and the main control board 201 and the fixed charging pile communicate with each other through a communication terminal 103. The input end of the first inverter 401 is connected to the low-voltage auxiliary power line terminal 102, the output end of the first inverter 401 is connected to the input end of the rectifying plate 402, and the output end of the rectifying plate 402 is connected to the power line terminal 101 to provide the initial voltage for starting the fixed charging pile. Because fixed charging stake can detect the initial voltage of treating the side of charging, actual battery can not have the electricity before treating charging, has initial voltage promptly, if initial voltage is zero, fixed charging stake can judge not put through, consequently can jump and not provide the electric quantity. The voltage dummy load circuit 400 is used to simulate the initial voltage of the car battery and load the initial voltage to the charging input terminal 100, so that the fixed charging pile starts the charging function.

Preferably, the input voltage of the low-voltage auxiliary power supply terminal is 12V, and the input voltage of the power supply terminal ranges from 200V to 750V.

In a specific embodiment, the main control board 201 is configured to switch off the voltage dummy load circuit 400 in response to the start of the charging function of the fixed charging pile, send a constant current charging demand message to enable the fixed charging pile to operate in a constant current mode at the second set current, and send a constant voltage charging demand message to the fixed charging pile to control the fixed charging pile to operate in a constant voltage mode at the first set voltage after the control output circuit 300 is turned on if the main control board 201 detects that the voltage of the charging input terminal 100 reaches the first set voltage. The main control board 201 is configured to simulate a charging state of a battery, and first requests a constant-current charging mode, and when a set voltage value is reached, requests a constant-voltage charging mode, where the constant-voltage charging function is to better protect the battery.

Preferably, the range value of the first setting voltage is 200-400V.

Referring to fig. 5, fig. 5 is a schematic diagram of a current dummy load circuit of a power cabinet system according to an embodiment of the present application, in which dummy loads R1, R2, and R3 of the current dummy load circuit 500 are coupled in parallel with an output circuit to the charging input terminal 100.

Preferably, the first set current value I is in the range of 0A < I < 3A.

The utility model also provides a charging system for the mobile charging pile, which comprises the power cabinet system shown in the figure 1 and a plurality of charging cabinets, wherein the power cabinet system provides electric energy for the plurality of charging cabinets.

The charging system for the mobile charging pile has the function of communicating with the BMS through the CAN network, and is used for judging the type of the battery and obtaining parameters of the power battery system and state parameters of the power battery before and during charging; the charging system should be able to judge whether charging gun, charging cable connect correctly, when charging pile detects when being connected with electric automobile battery system is abnormal in the charging process, stop charging immediately, and send alarm information.

Therefore, how to solve the problem that prevents fixed charging stake stop charging in the charging process becomes another big difficult problem in the design of power cabinet system, needs to cheat fixed charging stake misjudgement fixed charging stake trouble promptly and cut off the power supply. In the above embodiment, the control circuit 200 and the output circuit 300 are skillfully set to simulate the change of the battery capacity (SOC) of the fixed charging pile, and in the optimized scheme, the current pseudo-resistor circuit 500 is further adopted to increase the current of the main loop to cheat the fixed charging pile, so that the current which is mistaken for the output circuit 300 is always in a state larger than the cut-off current, and therefore, the power failure caused by mistaken connection abnormality of the charging pile is avoided in the charging process, the continuous charging state can be maintained, and the charging time can be controlled by sending an instruction by the main control board 201.

The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims

1. A power cabinet system configured to be coupled to a stationary charging post via a charging input, comprising:

an output circuit having a shunt coupled to a charging input;

the main control board is configured to feed back the electric quantity of the output circuit to the charging input end in real time.

2. The power cabinet system according to claim 1, further comprising a current dummy load circuit, wherein a dummy load in the current dummy load circuit is configured to be coupled to the charging input in parallel with the output circuit, wherein the main control board is configured to turn on the current dummy load circuit to cause the current of the output circuit to be greater than a first set current value I when detecting that the current value of the output circuit is less than the first set current value I, and turn off the current dummy load circuit otherwise.

3. The power cabinet system according to claim 2, wherein the first set current value I ranges from 0A < I < 3A.

4. The power cabinet system according to claim 1, further comprising a voltage dummy load circuit, wherein the voltage dummy load circuit comprises a first inverter and a rectifying plate, the charging input terminal comprises a power line terminal and a low-voltage auxiliary power line terminal, the input terminal of the first inverter is connected to the low-voltage auxiliary power line terminal, the output terminal of the first inverter is connected to the input terminal of the rectifying plate, and the output terminal of the rectifying plate is connected to the power line terminal to provide an initial voltage for starting the fixed charging pile.

5. The power cabinet system according to claim 4, wherein the input voltage at the low voltage auxiliary power line terminal is 12V, and the input voltage at the power line terminal ranges from 200V to 750V.

6. The power cabinet system according to claim 4, wherein the main control board is configured to switch off the voltage dummy load circuit in response to the start of the charging function of the fixed charging pile, send a constant current charging demand message to enable the fixed charging pile to operate in a constant current mode at a second set current, and control the output circuit to be switched on and then send a constant voltage charging demand message to the fixed charging pile to control the fixed charging pile to operate in a constant voltage mode at a first set voltage after the main control board detects that the voltage at the charging input end reaches the first set voltage.

7. The power cabinet system according to claim 6, wherein the range of the first set voltage is 200-400V.

8. The power cabinet system according to claim 1, wherein the output circuit further comprises a second inverter, the second inverter is connected to the front end of the shunt in parallel, and the main control board controls on/off of the branch where the shunt is located.

9. The power cabinet system according to claim 1, wherein a dc breaker for protecting system safety is provided between the charging input terminal and the output circuit.

10. A charging system for a mobile charging post, comprising the power cabinet system of any one of claims 1 to 9 and a plurality of charging cabinets, wherein the power cabinet system provides power to the plurality of charging cabinets.