CN217882878U - Charging control device and charging equipment - Google Patents

Abstract

The utility model discloses a charge control device and battery charging outfit relates to the technical field that charges to when solving and meetting the dangerous condition in the charging process, make the battery charging outfit outage guarantee the problem of personal safety. The charge control device includes: the charging device comprises a main controller, a signal conditioning circuit, a switch control circuit, a first switch and a second switch, wherein the first switch and the second switch are connected in series on a power supply circuit of the charging device. The charging equipment comprises the technical scheme. The utility model provides a charge control device and battery charging outfit are used for under emergency, control charging device's operating condition.

Description

Charging control device and charging equipment

Technical Field

The utility model relates to a technical field that charges, concretely relates to charging control device and battery charging outfit.

Background

New energy automobile all can need to fill electric pile when charging, and the charging control device and the battery charging outfit that fill electric pile then make when running into the dangerous condition in the charging process and fill electric pile outage and guarantee personal safety.

Fill electric pile's emergency button effect and be when filling electric pile emergence incident, can make the switch of equipment emergency stop to press the emergency stop button under special circumstances, main control unit responds to the signal that the emergency stop button was pressed, can control supply circuit and stop the power supply, avoids appearing the danger that personnel electrocute. However, if the main controller controls the power supply circuit to stop supplying power untimely, unsafe accidents can be caused.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a charge control device and battery charging outfit to and time control battery charging outfit stops to the consumer power supply, thereby avoid unsafe occurence of failure.

In order to achieve the above object, the present invention provides a charging control device and a charging apparatus, which includes a main controller, a signal conditioning circuit, a switch control circuit, and a first switch and a second switch connected in series to a power supply circuit of the charging device;

the first switch is electrically connected with the signal input end of the controller through the signal conditioning circuit, and the signal output end of the controller is electrically connected with the second switch through the switch control circuit;

when the first switch is in an off state, the second switch is in an off state; when the first switch is in the closed state, the second switch is in the closed state.

Compared with the prior art, the utility model provides an among the charging control device, first switch and second switch concatenate on charging device's supply circuit, can break off charging device's supply circuit rapidly through first switch for charging device's supply circuit stops to the consumer power supply, thereby avoids because supply circuit stops the power supply untimely, the unsafe accident that leads to takes place. Meanwhile, the first switch is electrically connected with the signal input end of the main controller through the signal conditioning circuit, and the signal output end of the main controller is electrically connected with the second switch through the switch control circuit, so that the signal conditioning circuit can also transmit a disconnection signal of the first switch to the main controller under the condition that the first switch is disconnected, and the main controller can control the second switch to be disconnected according to the disconnection signal. Therefore, when the first switch is turned off, the first switch fails to successfully turn off the power supply circuit of the charging device for some reasons, and the second switch can also be used as a standby switch to turn off the power supply circuit of the charging device, so that the reliability of the charging control device is ensured.

The utility model also provides a battery charging outfit, this battery charging outfit include the charge control device and the battery charging outfit that above-mentioned technical scheme provided

Compared with the prior art, the utility model provides a charging equipment have beneficial effect with the utility model provides a charging control device's beneficial effect is the same, no longer gives unnecessary details here.

Drawings

The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:

fig. 1 is a block diagram illustrating a charging control apparatus according to an embodiment of the present invention;

fig. 2 shows a block diagram of a signal conditioning circuit according to an embodiment of the present invention;

fig. 3 shows a schematic circuit diagram of a signal conditioning circuit in an embodiment of the present invention;

fig. 4 shows a block diagram of a switch control circuit in an embodiment of the present invention;

fig. 5 shows a circuit schematic diagram of the switch control circuit in the embodiment of the present invention.

Fig. 6 shows a schematic circuit diagram of a charging device provided by an embodiment of the present invention.

Reference numerals:

100-a charge control device; a first switch SW1; 101-a master controller; 102-signal conditioning circuitry; 1021-an isolation sub-circuit; 1022-an anti-jamming subcircuit; 1023-a filter shaping sub-circuit; 1024 — a first power supply; 103-a switch control circuit; 1031-signal conversion sub-circuit; 1032-a signal amplification sub-circuit; RLY 1-a second switch; RLY 2-third switch; GND-ground; R1-R12-first to twelfth resistors; d1, a voltage stabilizing diode; c1-a first capacitor; c2-a second capacitor; ISO 1-optical coupler; U1-Schmitt trigger buffer; STOP-first switch off signal; AC _ OUTPUT _ EN1 — master controller first control signal; AC _ OUTPUT _ EN2 — master controller second control signal; a U2-XOR gate; a Q1-triode; a D2-diode; 200-a power supply loop; 201-line branch; 202-a power supply; 2011-neutral branch; 2012-line branch.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

The charging control device is a device capable of carrying out emergency control on equipment, and when the equipment has a safety accident, the device can make the equipment suddenly stop so as to press a sudden stop button under special conditions to stop the equipment and avoid the danger of electric shock of personnel. However, if the stop voltage output is not sufficient, a safety accident may occur in time.

To the above problem, an embodiment of the utility model provides a charge control device, it can control the battery charging outfit and whether supply power to the consumer to improve battery charging device's reliability and battery charging outfit's security.

In practical applications, the charging device may be, in terms of the type of electric energy to be charged: fast charging equipment, slow charging equipment, constant current charging equipment and the like. From the perspective of whether the charging equipment is movable, the charging equipment can be a movable alternating-current charging pile, a movable direct-current charging pile, a wall-mounted charging equipment and the like. The electric devices may include, but are not limited to, various electric vehicles, home appliances, industrial devices, or the like. For example: the electric vehicle may include an electric automobile, an electric bicycle, an electric motorcycle, and the like.

Fig. 1 shows an application structure schematic diagram of a charging control device in a charging device according to an embodiment of the present invention. As shown in fig. 1, a charging control apparatus 100 provided by an embodiment of the present invention includes a main controller 101, a signal conditioning circuit 102, a switch control circuit 103, a first switch SW1, and a second switch RLY1. The first switch SW1 and the second switch RLY1 are connected in series to the power supply circuit 200 of the charging device. The types of the first switch SW1 and the second switch RLY1 are various, and may be an electronic switch that can be switched on and off by a control signal, or a manual switch, and may be specifically selected according to actual situations.

As shown in fig. 1, the first switch SW1 is electrically connected to a signal input terminal of the main controller 101 through a signal conditioning circuit 102, and a signal output terminal of the main controller 101 is electrically connected to the second switch RLY1 through a switch control circuit 103. When the first switch SW1 is in the open state, the second switch RLY1 is in the open state, and when the first switch SW1 is in the closed state, the second switch RLY1 is in the closed state.

Next, a scene in which the ac charging pile charges the electric vehicle will be taken as an example, and the charging control apparatus 100 and the charging device control the charging process of the ac charging pile.

If the ac charging post is controlled to be stopped urgently, as shown in fig. 1, the power supply circuit 200 is disconnected by the first switch SW1, so that the ac charging post stops charging the electric vehicle. For example: when the first switch SW1 is a push switch, and the first switch SW1 is turned off by pressing, theoretically, the ac charging pile stops charging the electric vehicle. Meanwhile, the signal conditioning circuit 102 detects the turn-off signal of the first switch SW1 and transmits the turn-off signal to the main control terminal, and the main control terminal receives the turn-off signal, can generate a control signal based on the turn-off signal, and transmits the control signal to the switch control circuit 103 so as to control the turn-off of the second switch RLY1 by using the switch control circuit 103.

As shown in fig. 1, when the first switch SW1 is not turned off due to aging of the switching device, sensitivity failure, and the like, the second switch RLY1 may be used as a compensation to stop charging the electric vehicle through the ac charging post. It can be seen that when the first switch SW1 is turned off, the second switch RLY1 is also in the off state. At this time, the power supply circuit 200 is disconnected, and the alternating-current charging pile stops charging the electric automobile.

As shown in fig. 1, in the charging control device 100 provided in the embodiment of the present invention, the first switch SW1 and the second switch RLY1 are connected in series on the power supply circuit 200 of the charging device, and the user can rapidly disconnect the power supply circuit 200 of the charging device through the first switch SW1, so that the power supply circuit 200 of the charging device stops supplying power to the electric equipment, thereby avoiding the occurrence of unsafe accidents caused by the power supply circuit 200 stopping supplying power untimely. Meanwhile, the first switch SW1 is electrically connected to a signal input end of the main controller 101 through the signal conditioning circuit 102, and a signal output end of the main controller 101 is electrically connected to the second switch RLY1 through the switch control circuit 103, so that when the first switch SW1 is turned off, the signal conditioning circuit 102 can also transmit a turn-off signal of the first switch SW1 to the main controller 101, and the main controller 101 can control the turn-off of the second switch RLY1 according to the turn-off signal. Based on this, when the first switch SW1 is turned off, for some reason, the first switch SW1 fails to turn off the power supply circuit 200 of the charging device, and the second switch RLY1 can also be used as a backup switch to turn off the power supply circuit 200 of the charging device, thereby ensuring the reliability of the charging control device 100 and the charging equipment.

In some possible implementations, fig. 2 shows a schematic structural diagram of the signal conditioning circuit 102 according to an embodiment of the present invention. As shown in fig. 2, the signal conditioning circuit 102 includes an isolation sub-circuit 1201, an anti-interference sub-circuit 1022, and a filter shaping sub-circuit 1023. A first signal input end of the isolation sub-circuit 1201 is used for being connected with a first power supply, a second signal input end of the isolation sub-circuit 1201 is electrically connected with the first switch SW1, and a signal output end of the isolation sub-circuit 1201 is electrically connected with a signal input end of the anti-interference sub-circuit 1022; the signal output end of the anti-interference sub-circuit 1022 is electrically connected to the signal input end of the filter shaping sub-circuit 1023, and the signal output end of the filter shaping circuit 1023 is electrically connected to the signal input end of the main controller 101.

As shown in fig. 2, when the first switch SW1 is turned off, the power supply circuit 200 is also theoretically turned off, and the charging device stops supplying power to the electric device. The isolation sub-circuit 1201 receives a signal of the first switch SW1, transmits the signal to the anti-interference sub-circuit 1022, the anti-interference sub-circuit 1022 performs unidirectional transmission of the signal, transmits the signal to the filtering and shaping sub-circuit 1023, and the filtering and shaping sub-circuit 1023 performs rectangular pulse shaping of waveform distortion, so that an ideal rectangular pulse is obtained, and transmits the signal to the main controller 101.

In some optional manners, as shown in fig. 2, the isolation sub-circuit 1201 is a voltage regulation sub-circuit, and the first switch SW1 is electrically connected to the signal input terminal of the anti-interference sub-circuit 1022 through the voltage regulation sub-circuit. In this case, when the first switch SW1 is turned off, the voltage regulator sub-circuit can ensure that the input signal of the anti-interference sub-circuit 1022 is stable, and thus, the input end and the output end of the anti-interference sub-circuit 1022 are completely and electrically isolated.

Illustratively, as shown in fig. 2, the anti-interference sub-circuit 1022 may be an optical coupler, and is configured to perform signal transmission between the isolation sub-circuit 1201 and the filter shaping sub-circuit 1023, where signals of the optical coupler are transmitted unidirectionally. Under the effect of the voltage stabilizing sub-circuit, the input signal voltage of the optical coupler is stable, so that the input end and the output end of the optical coupler are completely electrically isolated, the output signal has no influence on the input end, the anti-interference capability is strong, and the transmission efficiency is high.

As shown in fig. 2, the filter shaping sub-circuit 1023 may be a schmitt trigger buffer, which is used to process the signal transmitted by the anti-interference sub-circuit 1022, and in a digital system, the rectangular pulse is often distorted in waveform during transmission, and the rising edge and the falling edge are not ideal, and after shaping by the schmitt trigger buffer, a more ideal rectangular pulse wave is obtained, and the signal is transmitted to the main controller 101.

For example, fig. 3 shows a schematic structural diagram of a signal conditioning circuit according to an embodiment of the present invention. As shown in fig. 3, when the anti-interference sub-circuit 1022 shown in fig. 2 is the optical coupler ISO1 shown in fig. 3, the filter shaping sub-circuit 1023 shown in fig. 2 is the schmitt trigger buffer U1 shown in fig. 3, the isolation sub-circuit 1201 includes a zener diode D1, a capacitor C1, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, and a first power supply, and the voltage of the first power supply may be 12V or may be selected according to actual situations. The first resistor R1 is connected with a first power supply, the second resistor R2 is also connected with the first switch SW1, and the anode of the voltage stabilizing diode D1, the capacitor C1 and the third resistor R3 are all grounded. The cathodes of the first resistor R1, the second resistor R2 and the zener diode D1 are all connected to the first end of the fourth resistor R4, the second end of the fourth resistor R4 is connected to the signal input terminals of the capacitor C1, the third resistor R3 and the optical coupler ISO1, the filter-shaping sub-circuit 1023 may include a schmitt trigger buffer U1, a fifth resistor R5, a sixth resistor R6 and a second power supply (voltage may be 3.3V), the first signal input terminal of the sixth resistor R6 is electrically connected to the signal output terminal of the anti-interference sub-circuit 1022, the second signal input terminal is electrically connected to the fifth resistor R5, the signal output terminal of the sixth resistor R6 is electrically connected to the signal input terminal of the schmitt trigger buffer U1, the other end of the fifth resistor R5 is electrically connected to the second power supply, and the signal output terminal of the filter-shaping sub-circuit 1023 is electrically connected to the signal input terminal of the main controller 101.

In specific implementation, as shown in fig. 3, the capacitor C1, the zener diode D1, and the third resistor R3 are grounded, the cathode of the zener diode D1 is connected to the first end of the fourth resistor R4, and the third resistor R3 and the capacitor C1 are both connected to the second end of the fourth resistor R4, so that the potential difference between the two ends of the fourth resistor R4 is constant. Based on this, when the first switch SW1 is turned off, one end of the second resistor R2 is floating. Assuming that the optical coupler ISO1 meets the conditions of high-level input and low-level output, when direct current (voltage may be 12V) output by a power supply can enter the optical coupler ISO1 through the first resistor R1 and the fourth resistor R4, the voltage entering the optical coupler ISO1 is constant, and output signal deviation of the optical coupler ISO1 caused by unstable input voltage is avoided. Therefore, the operation of the optical coupler ISO1 can be controlled more stably. At this time, the isolation sub-circuit 1201 isolates the first switch SW1 from the optical coupler ISO1, so as to avoid an unnecessary influence of a switching part on the optical coupler ISO1, in this embodiment, the optical coupler ISO1 is turned on at a high level, and the isolation sub-circuit 1201 also has a voltage reduction function. In the isolation sub-circuit 1201, the cathode of the zener diode D1 is connected to the first resistor R1, and a large voltage drop is generated when the 12V voltage passes through the first resistor R1, so that the output voltage is reduced to a voltage sufficient for conducting the optocoupler ISO1, and the zener diode D1 makes the output voltage of the isolation sub-circuit 1201 more stable.

As shown in fig. 3, a signal input end of the optical coupler ISO1 is electrically connected to a signal output end of the isolation sub-circuit 1201, when the first switch SW1 is turned off, the signal input end of the optical coupler ISO1 is at a high level, the optical coupler ISO1 is turned on, and the signal output end is at a low level. When the first switch SW1 is closed, the signal input end of the optical coupler ISO1 is at a low level, the optical coupler ISO1 is not conducted, and the signal output end is at a high level. The signal input end of the Schmidt trigger buffer U1 is electrically connected with the signal output end of the optical coupler ISO1 through a sixth resistor R6, the other end of the sixth resistor R6 is electrically connected with the signal input end of the Schmidt trigger buffer U1, the first signal input end of the sixth resistor R6 is electrically connected with the optical coupler ISO1, the second signal input end is electrically connected with a fifth resistor R5, and the other end of the fifth resistor R5 is connected with 3.3V voltage so as to ensure that the input end of the Schmidt trigger buffer U1 is not suspended. When the first switch SW1 is turned off, the signal input end of the optical coupler ISO1 is at a high level, the optical coupler ISO1 is turned on, and the signal output end of the optical coupler ISO1 is at a low level; the optical coupler ISO1 transmits the low-level signal to a signal input end of the Schmitt trigger buffer U1; when the first switch SW1 is closed, the signal input end of the optical coupler ISO1 is at a low level, the optical coupler ISO1 is disconnected, and the signal output end is at a high level; the optical coupler ISO1 transmits the level signal to the signal input end of the schmitt trigger buffer U1, and the schmitt trigger buffer U1 processes the signal and transmits the processed signal to the main controller 101 through the signal output end.

In some embodiments, as shown in fig. 3, the signal conditioning circuit 102 may convert the turn-off signal of the first switch into a digital turn-off signal. Here, the signal conditioning circuit 102 may further include an eighth resistor R8 to limit the digital off signal output by the schmitt trigger buffer U1. The main controller 101 is configured to receive a digital off signal and transmit a control signal to the switch control circuit 103 based on the digital off signal.

Illustratively, the main Controller 101 may be an MCU (Micro Controller Unit), i.e., a microcontroller, also called a single chip, or a logic circuit. The signal processing method here may be selected from various existing signal processing methods as long as the control signal can be generated based on the digital off signal.

In specific implementation, as shown in fig. 1, when the first switch SW1 is closed, the main controller 101 does not receive the digital off signal in the signal conditioning circuit 102, and the main controller 101 does not transmit a control signal to the switch control circuit 103, at this time, the charging device operates normally. When the first switch SW1 is turned off, the signal conditioning circuit 102 changes the signal, and the main controller 101 controls the switching circuit based on the change. In practical applications, the master controller 101 may be communicatively coupled to at least one of a server, an alarm, and the like.

In one example, as shown in fig. 1, when the main controller 101 is communicatively connected to a server, the main controller 101 may upload the switch state information of the first switch SW1 to the server, and the user terminal may access the server to obtain the state of the first switch SW 1.

In one example, as shown in fig. 1, when the main controller 101 is connected to an alarm, in the case of an off state of the first switch SW1, a signal at a signal input end of the main controller 101 changes, the main controller 101 senses the change of the signal and sends an instruction, the alarm is connected to the main controller 101, and when the signal changes, the alarm is triggered, and the alarm operates to warn.

In one possible implementation, fig. 4 shows a block diagram of a switch control circuit according to an embodiment of the present invention. As shown in fig. 4, the above-described switch control circuit 103 includes a signal conversion sub-circuit 1031 and a signal amplification sub-circuit 1032. A signal input terminal of the signal converting sub-circuit 1031 is electrically connected to a signal output terminal of the main controller 101, a signal output terminal of the signal converting sub-circuit 1031 is electrically connected to a signal input terminal of the signal amplifying sub-circuit 1032, and a signal output terminal of the signal amplifying sub-circuit 1032 is electrically connected to a signal input terminal of the second switch RLY1.

As shown in fig. 1 and 4, when the first switch SW1 is turned off, the off signal is transmitted to the main controller 101 through the signal conditioning circuit 102, the main controller 101 performs information processing to generate a control signal, and the control signal is transmitted to the signal converting sub-circuit 1031. The signal converting sub-circuit 1031 performs a switching function on the signal path to control the transmission of the signal, the signal converting sub-circuit 1031 outputs the signal to the signal amplifying sub-circuit 1032, and the signal amplifying sub-circuit 1032 amplifies the signal, so that the second switch RLY1 can also respond and react quickly.

In some alternatives, as shown in fig. 4, the signal converting sub-circuit 1031 is a multiplexer, the multiplexer has at least two signal input terminals, the at least two signal output terminals of the master and the multiplexer have at least two signal input terminals in a one-to-one correspondence and are electrically connected, and the signal output terminal of the multiplexer is electrically connected to the signal input terminal of the signal amplifying sub-circuit 1032. The multiplexer selects one of a group of input signals according to different states of the input control signal and sends the selected one to a logic circuit of an output end, and the logic circuit is also called as a data selector or a multiplexer. It should be understood that the type of the multiplexer according to the embodiment of the present invention can be determined according to the control signal level required by the signal amplifying circuit when the first switch is turned off. For example: when the signal amplifying circuit amplifies a signal in the case where a high potential is required, a multiplexer that outputs a high level signal in the case where the first switch is turned off should be selected. Another example is: when the signal amplification sub-circuit 1032 needs to amplify a signal in the case of a low potential, a multiplexer that outputs a low level signal in the case where the first switch is turned off should be selected.

Illustratively, in order to ensure the stable operation of the multiplexer, each signal output end of the multiplexer is connected with a ground resistor. Fig. 5 shows the circuit schematic diagram of the switch control circuit in the embodiment of the present invention, as shown in fig. 5, when the signal conversion sub-circuit 1031 is an exclusive or gate U2 circuit, the first signal input terminal of the exclusive or gate U2 circuit is electrically connected to the first signal output terminal of the main controller 101 and the tenth resistor R10, the second signal input terminal of the exclusive or gate U2 circuit is electrically connected to the second signal output terminal of the main controller 101 and the ninth resistor R9, and the ninth resistor R9 and the tenth resistor R10 are grounded, so as to ensure that the two signal input terminals of the exclusive or gate U2 have the same signal input when the circuit normally works.

In some optional manners, as shown in fig. 5, the signal amplification sub-circuit 1032 may be a triode amplifier circuit or an MOS transistor amplifier circuit, and the function of the signal amplification sub-circuit 1032 is to amplify the weak signal output by the signal conversion sub-circuit 1031 into an electrical signal with a larger amplitude value, so as to obtain a stronger signal, so that the second switch RLY1 can respond quickly.

Illustratively, as shown in fig. 5, the signal amplifying sub-circuit 1032 may include a transistor Q1, a diode D2, and a fifth power supply, the signal output terminal of the signal converting sub-circuit 1031 may be electrically connected to the control terminal of the transistor Q1, the first electrode of the transistor Q1 is connected to ground, the second electrode of the transistor Q1 is electrically connected to the positive electrode of the diode D2, the negative electrode of the diode D2 is electrically connected to the fifth power supply, and the second switch RLY1 is connected in parallel to two ends of the diode D2.

In specific implementation, as shown in fig. 4 and 5, when the first switch SW1 is turned off, the signal output by the signal converting sub-circuit 1031 may control the potential of the second electrode of the transistor Q1 (i.e., the anode potential of the diode) to change the conducting state of the diode D2. The second switch RLY1 can be the relay, the electric shock system of this relay is the normally closed contact, closed under the normal condition, after the coil is electrified, the relay is disconnected; namely, the relay is in a closed state when the first switch SW1 is closed; when the first switch SW1 is turned off, the main controller 101 releases a signal to the switch control circuit 103, controlling the relay to be turned off.

In some examples, when the signal amplifying circuit is a transistor amplifying circuit, the transistor Q1 may be a transistor, and the transistor may be an NPN transistor or a PNP transistor.

Fig. 5 shows the circuit schematic diagram of the switch control circuit in the embodiment of the present invention, as shown in fig. 5, when the transistor Q1 is an NPN type triode, then under the condition that the first switch SW1 is turned off, the signal output by the signal conversion sub-circuit 1031 is a high level signal, and then the NPN type triode is turned on to output a low level signal. If the triode is a PNP triode, the signal output by the signal conversion sub-circuit 1031 is a low level signal when the first switch SW1 is turned off, so as to ensure that the PNP triode is turned on, and further output a high level signal.

In another example, when the signal amplifying circuit is a MOS transistor amplifying circuit, the transistor Q1 may be an NMOS transistor, or a PMOS transistor, if the transistor is an NMOS transistor, the NMOS transistor may refer to the related description of the NPN transistor in the foregoing description when the first switch SW1 is turned off, and if the transistor is a PMOS transistor, the NMOS transistor may refer to the related description of the PNP transistor in the foregoing description when the first switch SW1 is turned off.

In a specific implementation, as shown in fig. 6, when the first switch SW1 is closed, the control signal output by the main controller 101 includes two first low level signals, and the xor gate U2 circuit may output a second low level signal based on the two first low level signals, so as to control the signal amplification sub-circuit 1032 to be turned off by using the second low level signal. When the first switch SW1 is turned off, the signal conditioning circuit 102 sends a signal to the main controller 101, the main controller 101 performs signal processing, transmits an exclusive signal to the exclusive or gate U2, and the exclusive or gate U2 outputs a high level when the input levels are different. At this time, for the NPN transistor, the collector outputs a low level signal, and the second switch RLY1 is turned off.

The embodiment of the utility model provides a still provide a battery charging outfit, this battery charging outfit can include the utility model discloses charge control device 100 and power supply circuit 200. It should be understood that the charging device may also include a power supply 200 electrically connected to the power supply circuit 200.

The first switch SW1 and the second switch RLY1 included in the charge control device 100 are connected in series in the power supply circuit 200. The beneficial effects of the charging device are referred to the foregoing, and are not described herein again. It should be understood that the power supply circuit 200 of the exemplary embodiment of the present disclosure may be a dc power supply circuit or an ac power supply circuit.

In a possible implementation manner, the charging device further includes an alarm, and the signal output end of the main controller 101 is electrically connected to the alarm. Of course, the charging apparatus further includes a server and a user terminal, the main controller 101 communicates with the server, and the server communicates with the user terminal.

The utility model discloses supply circuit includes controllable switch, first power supply branch road and second power supply branch road. The controllable switch comprises a control device and a third switch RLY2 controlled by the control device. The first switch SW1, the second switch RLY1 and the control device are connected in series on the first power supply branch, and the third switch RLY2 is connected in series on the second power supply branch. The first switch SW1, the second switch RLY1 and the third switch RLY2 can select the type according to the actual situation.

Fig. 6 shows a schematic circuit diagram of an ac charging pile according to an exemplary embodiment of the present invention. As shown in fig. 6, the power supply circuit 200 of the ac charging pile is an ac power supply circuit, which has a neutral line branch and a live line branch. The first switch SW1 may be a two-way scram button, the second switch RLY1 shown may be a relay, and the third switch RLY2 may be a contactor, in which a coil of the contactor is energized and contacts are closed in a case where both the first switch SW1 and the second switch RLY1 are closed; when the first switch SW1 is turned off, the second switch RLY1 is turned off, and at this time, the power supply circuit is turned off, the contactor coil is powered off, and the normally closed contact is turned off.

As shown in fig. 3, the two-way emergency stop button, i.e. the first switch SW1, includes four pins, which are a first pin, a second pin, a third pin and a fourth pin, respectively, the first pin and the fourth pin are connected to the signal conditioning circuit 102, and the second pin and the third pin are connected to the neutral branch of the power supply circuit 200. Under the default condition, double-circuit scram button is first switch SW 1's second pin and third pin closure promptly, because the second pin, third pin and relay establish ties on the zero line is a branch, and main control unit 101 passes through switch control circuit 103 control relay, makes the relay be controlled by main control unit 101, consequently, when the second pin, under the equal closed condition of third pin and relay, the contactor just can be closed for electric equipment such as electric automobile output 220V alternating voltage can be passed through to the alternating-current charging stake.

When the emergency stop button is pressed down, the second pin and the third pin of the switch are disconnected, the contactor cannot be closed no matter whether the relay is closed or not, and the charging gun cannot output 220V voltage, so that the 220V voltage can be timely and effectively disconnected for output. The other switch of the emergency stop button is used for generating an emergency stop signal to the main controller 101.

As shown in fig. 3, the principle of the two-way scram button, i.e., the first switch SW1, generating the scram signal is as follows: the two-way emergency stop button is characterized in that a first switch SW1 is electrically connected with one end of a resistor R1, the other end of the resistor R1 is electrically connected with a resistor R2, a resistor R3 and a cathode of a voltage stabilizing diode D1, the other end of the resistor R2 is electrically connected with a 12V power supply, the other end of the voltage stabilizing anode diode D1, a capacitor C1 and a resistor R4 are grounded, and the other end of the resistor R3, the capacitor C1 and the resistor R4 are electrically connected with a signal input end (pin 1) of an optical coupler ISO 1; pins 2 and 3 of the optical coupler ISO1 are grounded, a signal output end (pin 4) of the optical coupler ISO1 is electrically connected with a resistor R5 and a resistor R6, and the other end of the resistor R5 is connected with a power supply of 3.3V; the other end of the resistor R6 is connected with the input end (end A) of the Schmidt trigger buffer U1, the GND end of the Schmidt trigger buffer U1 is grounded, the VCC end is connected with 3.3V voltage, one end of the capacitor C2 is connected with the GND end of the Schmidt trigger buffer U1, and the other end of the capacitor C2 is connected with the VCC end of the Schmidt trigger buffer U1; the signal output end, namely the Y end, of the Schmidt trigger buffer U1 is electrically connected with a resistor R7 and a resistor R8, the other end of the resistor R7 is connected with 3.3V voltage, and the resistor R8 is electrically connected with the signal input end of the main controller 101.

When the two-way emergency stop button is pressed, namely the first switch SW1 is not pressed, the first pin, the fourth pin, the second pin and the third pin of the switch are all connected, pins 3 and 4 of the optical coupler ISO1 are not conducted, at the moment, pin 1 of the signal input end of the optical coupler ISO1 is in a low level, pin 4 of the signal output end of the optical coupler ISO1 outputs a high level, the Schmidt trigger buffer U1 does not change the level, the Schmidt trigger buffer U1 receives the level and then transmits the level to the main controller 101, at the moment, the main controller 101 does not detect a disconnection signal, and the charging equipment works normally. When the two-way emergency stop button, namely the first switch SW1, is pressed down, the first pin, the fourth pin, the second pin and the third pin of the switch are all disconnected, one end of the resistor R1 is suspended, the signal input end, namely the pin 1, of the optical coupler ISO1 is at a high level, the pins 3 and 4 of the optical coupler ISO1 are connected, the signal input end a of the schmitt trigger buffer U1 is at a low level, the signal output end, namely the pin Y, of the schmitt trigger buffer U1 is also at a low level, and the main controller 101 determines that the two-way emergency stop button, namely the first switch SW1, is pressed down after detecting the low level, and then sends an emergency stop signal.

As shown in fig. 5 and 6, the main controller 101 controls the relay RLY1 to operate as follows: the first signal output end of the main controller 101 is electrically connected to the signal input end, i.e., the end a, of the resistor R10 and the signal input end of the xor gate U2, and the other end of the resistor R10 is grounded. A second signal output end of the main controller 101 is electrically connected with one end of the resistor R9 and a B end of the xor gate U2, the other end of the resistor R9 is grounded, a GND end of the xor gate U2 is grounded, a VCC end of the xor gate U2 is connected with 3.3V voltage, a Y pin of the xor gate U2 is a signal output end of the xor gate, a signal output end of the xor gate U2, namely a Y end, is connected with one end of the resistor R11, the other end of the resistor R11 is electrically connected with a pin 1 of the resistor R12 and the NPN type triode Q1, and the other end of the resistor R12 is grounded. The pin 3 of the NPN type triode Q1 is electrically connected with the anode of the diode D2, the cathode of the diode D2 is connected with a 12V power supply, and the relay RLY1 is connected with the diode D2 in parallel.

When the double-path emergency stop button, namely the first switch SW1, is not pressed, the first control signal AC _ OUTPUT _ EN1 and the second control signal AC _ OUTPUT _ EN2 of the main controller 101 have the same level, at this time, the xor gate OUTPUTs a low level, the NPN type triode is not turned on in a low level, and at this time, the relay is turned on.

When the double-channel emergency stop button, namely the first switch SW1, is pressed, the levels of the first control signal AC _ OUTPUT _ EN1 and the second control signal AC _ OUTPUT _ EN2 of the main controller 101 are inconsistent, at this time, the exclusive or gate OUTPUTs a high level, the high level of the NPN type triode is turned on, and at this time, the relay is turned off.

In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A charging control apparatus for controlling a charging apparatus, the charging control apparatus and a charging device comprising: the charging device comprises a main controller, a signal conditioning circuit, a switch control circuit, a first switch and a second switch, wherein the first switch and the second switch are connected in series on a power supply circuit of the charging device;

the first switch is electrically connected with the signal input end of the main controller through the signal conditioning circuit, and the signal output end of the main controller is electrically connected with the second switch through the switch control circuit;

when the first switch is in an open state, the second switch is in an open state, and when the first switch is in a closed state, the second switch is in a closed state.

2. The charge control device of claim 1, wherein the signal conditioning circuit comprises: the device comprises an isolation sub-circuit, an anti-interference sub-circuit and a filtering and shaping sub-circuit;

the first signal input end of the isolation sub-circuit is used for being connected with a first power supply, the second signal input end of the isolation sub-circuit is electrically connected with a first switch, the signal output end of the isolation sub-circuit is electrically connected with the signal input end of the anti-interference sub-circuit, the signal output end of the anti-interference sub-circuit is electrically connected with the signal input end of the filtering and shaping sub-circuit, and the signal output end of the filtering and shaping sub-circuit is electrically connected with the signal input end of the main controller.

3. The charge control device according to claim 2, wherein the isolation sub-circuit is a voltage regulator sub-circuit, and the first switch is electrically connected to the signal input terminal of the anti-interference sub-circuit through the voltage regulator sub-circuit; and/or the presence of a gas in the gas,

the anti-jamming sub-circuit comprises an optical coupler, and the filtering and shaping sub-circuit comprises a Schmitt trigger buffer.

4. The charge control device according to any one of claims 1 to 3, wherein the switch control circuit includes a signal conversion sub-circuit and a signal amplification sub-circuit;

the signal input end of the signal conversion sub-circuit is electrically connected with the signal output end of the main controller, the signal output end of the signal conversion sub-circuit is electrically connected with the signal input end of the signal amplification sub-circuit, and the signal output end of the signal amplification sub-circuit is electrically connected with the signal input end of the second switch.

5. The charging control device of claim 4, wherein the signal conversion sub-circuit is a multiplexer, the multiplexer has at least two signal inputs, at least two signal outputs of the main controller are electrically connected to the multiplexer in a one-to-one correspondence, and a signal output of the multiplexer is electrically connected to a signal input of the signal amplification sub-circuit.

6. The charge control device of claim 5, wherein the switch control circuit further comprises at least two resistors each connected to ground, the multiplexer having each signal input electrically connected to a respective resistor.

7. The charging control device of claim 4, wherein the signal conversion sub-circuit is an exclusive-OR gate, and the signal amplification circuit is a triode amplification circuit or a MOS transistor amplification circuit.

8. A charging apparatus comprising the charge control device according to any one of claims 1 to 7 and a power supply circuit;

the first switch and the second switch contained in the charging control device and the charging equipment are connected in series in the power supply circuit.

9. Charging apparatus according to claim 8, wherein the supply circuit comprises a controllable switch, a first supply branch and a second supply branch, the controllable switch comprising control means and a third switch controlled by the control means;

the first switch, the second switch and the control device are connected in series on the first power supply branch, and the third switch is connected in series on the second power supply branch.

10. The charging device according to claim 8, wherein the charging control device and the charging device further comprise an alarm, and the signal output end of the main controller is electrically connected with the alarm; and/or the presence of a gas in the gas,

the charging equipment further comprises a server and a user terminal, the main controller is communicated with the server, and the server is communicated with the user terminal.

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