CN213025952U - Relay energy-saving circuit, energy storage device and vehicle - Google Patents
Relay energy-saving circuit, energy storage device and vehicle Download PDFInfo
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- CN213025952U CN213025952U CN202021996990.6U CN202021996990U CN213025952U CN 213025952 U CN213025952 U CN 213025952U CN 202021996990 U CN202021996990 U CN 202021996990U CN 213025952 U CN213025952 U CN 213025952U
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Abstract
The application discloses a relay energy-saving circuit, an energy storage device and a vehicle, wherein the circuit comprises a flyback power module, and the flyback power module can stabilize the input voltage; the delay turn-off module is used for closing the relay when being switched on; and the step-down conversion module is used for carrying out step-down conversion on the input voltage and outputting the converted input voltage to the relay, and the output voltage obtained by the step-down conversion module can ensure that the relay maintains a pull-in state when the delay turn-off module is disconnected. The driving voltage required for keeping the relay closed is reduced through the voltage reduction conversion module, so that the driving current is reduced, the resistance voltage division is avoided, and the high energy-saving efficiency can be achieved.
Description
Technical Field
The utility model relates to a circuit control technical field, concretely relates to relay energy-saving circuit, energy memory and vehicle.
Background
With the increasing importance and the high price of energy sources, the energy saving of circuits also becomes more and more important, in the current energy storage products, many relays are directly driven, the circuits are simple, no additional circuit is provided, but the purpose of energy saving can not be realized by direct driving, and the energy consumption is high. And a part of the energy-saving circuit utilizes a relay coil to be connected with an RC in series to achieve the purpose of energy saving. The relay coil is connected with the RC in series, so that a certain energy-saving purpose can be achieved, but the resistor R can consume power all the time due to the introduction of the resistor R, and although some electric energy can be saved, the energy-saving effect is not high, and the energy-saving effect is not ideal.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned drawbacks and deficiencies of the prior art, it is desirable to provide a relay energy saving circuit, an energy storage device and a vehicle to achieve higher energy saving efficiency.
In a first aspect, the present invention provides a relay energy-saving circuit, the circuit includes:
the flyback power supply module is connected with an input voltage at the input end of the flyback power supply module, and can stabilize the input voltage; the input end of the delay turn-off module is connected with the output end of the flyback power supply module, the output end of the delay turn-off module is connected with the input end of the relay, and the delay turn-off module is switched on to close the relay; the input end of the step-down conversion module is connected with the output end of the flyback power supply module, the output end of the step-down conversion module is connected with the input end of the relay, the step-down conversion module performs step-down conversion on input voltage and outputs the converted input voltage to the input end of the relay, and output voltage obtained through step-down conversion can ensure that the relay maintains a pull-in state when the delay turn-off module is disconnected.
In one embodiment, the input voltage is provided by a power supply, the anode of the power supply is connected with the input end of the flyback power supply module, and the cathode of the power supply is connected with the output end of the relay through a controllable switch.
In one embodiment, the delayed turn-off module comprises: the input end of the first resistor is connected with an input voltage; the input end of the capacitor is connected with the output end of the first resistor; the input end of the second resistor is connected with the output end of the capacitor, and the output end of the second resistor is grounded; the grid electrode of the first transistor is connected with the output end of the capacitor, and the source electrode of the first transistor is grounded; the input end of the third resistor is connected with an input voltage; a gate of the second transistor is connected with an output end of the third resistor, a source of the second transistor is connected with an input voltage, and a drain of the second transistor is connected with the relay; and the input end of the fourth resistor is connected to the grid electrode of the second transistor and the output end of the third resistor, and the output end of the fourth resistor is connected with the drain electrode of the first transistor.
In one embodiment, the delayed turn-off module further includes: and the input end of the voltage-stabilizing tube is connected with the output end of the capacitor, and the output end of the voltage-stabilizing tube is grounded.
In one embodiment, the delay time of the delay turn-off module is positively correlated to the magnitudes of the first resistance, the second resistance, and the capacitance.
In one embodiment, the circuit further comprises: the reverse prevention module is connected between the output end of the voltage reduction conversion module and the input end of the relay, the input end of the reverse prevention module is connected with the output end of the voltage reduction conversion module, the output end of the reverse prevention module is connected with the input end of the relay, and when the delay turn-off module is conducted, the reverse prevention module prevents the delay turn-off module from being conducted with the voltage reduction conversion module.
In one embodiment, the reverse prevention module comprises a diode, the anode of the diode is connected with the input end of the buck conversion module, and the cathode of the diode is connected with the input end of the relay.
In a second aspect, the present invention provides an energy storage device, including the above relay energy saving circuit.
In a third aspect, the present invention provides a vehicle comprising the energy storage device described above.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a relay energy-saving circuit, energy memory and vehicle, the circuit includes flyback power module, flyback power module can carry out the steady voltage to the input voltage; the delay turn-off module is used for closing the relay when being switched on; and the step-down conversion module is used for carrying out step-down conversion on the input voltage and outputting the converted input voltage to the relay, and the output voltage obtained by the step-down conversion module can ensure that the relay maintains a pull-in state when the delay turn-off module is disconnected. The driving voltage required for keeping the relay closed is reduced through the voltage reduction conversion module, so that the driving current is reduced, the resistance voltage division is avoided, and the high energy-saving efficiency can be achieved.
Drawings
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 shows a block diagram of a relay energy saving circuit according to an embodiment of the present application;
fig. 2 shows a circuit diagram of a relay power saving circuit according to an embodiment of the present application.
Detailed Description
The present application will be described in further detail with reference to the following drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the relevant invention and are not limiting of the invention. It should be noted that, for convenience of description, only the portions related to the present invention are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
The energy-saving relay circuit and the energy storage device according to the embodiment of the present invention will be described with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 shows a block diagram of a relay energy-saving circuit provided in the present application. The circuit includes:
the flyback power supply module is connected with an input voltage at the input end of the flyback power supply module, and can stabilize the input voltage; the input end of the delay turn-off module is connected with the output end of the flyback power supply module, the output end of the delay turn-off module is connected with the input end of the relay, and the delay turn-off module is switched on to close the relay; the input end of the step-down conversion module is connected with the output end of the flyback power supply module, the output end of the step-down conversion module is connected with the input end of the relay, the step-down conversion module performs step-down conversion on input voltage and outputs the converted input voltage to the input end of the relay, and output voltage obtained through step-down conversion can ensure that the relay maintains a pull-in state when the delay turn-off module is disconnected.
Specifically, the voltage required to maintain the relay in the pull-in state is relatively low because the voltage required to pull-in the relay is relatively high. And when the time delay is started, the turn-off module is in a conducting state, so that enough current is ensured to drive the relay to be closed. When the relay is reliably closed, the delay turn-off module is switched off, the voltage reduction conversion module performs voltage reduction treatment, and current is provided to enable the relay to keep a closed state. The driving voltage required by the relay to be kept closed is reduced through the voltage reduction conversion module, so that the driving current is reduced, the energy consumption of the relay in steady-state work is optimized, and the purposes of high energy-saving efficiency and energy saving are achieved. A flyback power supply module is additionally arranged in front of the delay turn-off module and the voltage reduction conversion module, the flyback power supply module can stabilize the input voltage to a fixed value, and the normal work of the rear module can be guaranteed no matter the power supply voltage is higher than the voltage for driving the relay to be closed or lower than the relay holding voltage.
It should be noted that, the input voltage mentioned above is provided by a power supply, an anode of the power supply is connected to the input end of the flyback power supply module, and a cathode of the power supply is connected to the output end of the relay through a controllable switch.
The input voltage can adopt direct current low-voltage electricity, and the power supply can adopt a storage battery. When the relay needs to be closed, the controllable switch is closed, and the direct-current low-voltage electricity of the storage battery is transmitted to the delay turn-off module and the voltage reduction conversion module. The delay turn-off module is switched on and outputs driving current to drive the relay to be closed; meanwhile, after the direct-current low-voltage electricity provided by the low-voltage storage battery is subjected to voltage reduction conversion, the voltage reduction conversion module outputs smaller driving direct current to the reverse prevention module, and the energy consumption of the relay in stable-state operation is optimized.
Referring to fig. 2, fig. 2 shows a circuit diagram of a relay power saving circuit provided in the present application.
The delay shutdown module may include: a first resistor R1The first resistor R1The input end of the voltage regulator is connected with input voltage; capacitor C1The input end of the capacitor and the first resistor R1The output ends of the two-way valve are connected; a second resistor R2Said second resistance R2Is connected with the output end of the capacitor, and the second resistor R2The output end of the transformer is grounded; a first transistor Q1The first transistor Q1Is connected to the output terminal of the capacitor, the first transistor Q1The source of (2) is grounded; third resistor R3The input end of the third resistor is connected with an input voltage; second transistor Q2The second transistor Q2Is connected to the output terminal of the third resistor, the second transistor Q2The source of (2) is connected to the input voltage, the secondTransistor Q2The drain electrode of the relay is connected with the relay; a fourth resistor R4The input end of the fourth resistor is connected to the second transistor Q2And the output end of the fourth resistor is connected with the first transistor Q1Of the substrate. Preferably, the delay shutdown module further includes: and the input end of the voltage-stabilizing tube is connected with the output end of the capacitor, and the output end of the voltage-stabilizing tube is grounded.
After the controllable switch is closed, the delay turn-off module is turned on, so that the corresponding circuit is in a conducting state, and sufficient current is ensured to drive the relay to be closed. After a period of time, the relay has been reliably closed, which is the time delay shutdown module opened, and current will be provided by the buck converter module to maintain the relay closed. Wherein the delay time of the turn-off module and the first resistor R are delayed1The second resistor R2And said capacitor C1Is positively correlated with the magnitude of (a). Specifically, the time constant of this RC circuit is equal to (R)1+R2)*C1When 2-3 time constants have elapsed, C1Already filled, the second resistor R2The voltage division is very small, the first transistor Q1Will be turned off. The specific implementation can be based on the first transistor Q1And the input voltage of the power supply.
The delay time of the delayed turn-off module can be calibrated according to actual conditions, and is generally 150 ms.
Specifically, after the controllable switch is closed, the power supply starts to supply power to the delay turn-off module through the flyback power module, and the capacitor C1Is in a short-circuit state at the beginning, and the first resistor R1A second resistor R2By voltage division to the first transistor Q1Is supplied by a gate of a first transistor Q1Is turned on, the third resistor R is turned on3A fourth resistor R4After voltage division, the voltage is supplied to a second transistor Q2Is supplied by the gate of the second transistor Q2On, the second transistor Q2After the relay is switched on, the power supply directly supplies power to the relay to switch on the relay. Starting the second transistor Q1Grid electrode ofThe voltage is higher, so a voltage stabilizing tube TV is added1And stabilizing the grid voltage. Over time, the capacitance C1Is gradually increased, the first resistor R1A second resistor R2The voltage on the second resistor R gradually decreases2To the first transistor Q1Below the turn-on voltage of, the first transistor Q1Off when the second transistor Q is turned off2And then closed. And the delayed turn-off module stops supplying power.
The flyback power module and the buck conversion module are similar in implementation principle, are both a DC-DC conversion topology, and mainly achieve set stable output voltage through a loop control circuit. The basic principle is as follows: after the output voltage (Vo) and the reference voltage (Vref) pass through the differential amplification circuit, the conduction time of the switching tube is controlled through a Pulse Width Modulation (PWM) circuit, so that the purpose of outputting stable voltage is achieved. The loop control circuit of the DC-DC topology may be implemented by a separate device, for example: operational amplifiers, comparators, clock circuits, flip-flops, etc., may also be implemented by integrated IC chips, such as: a buck converter module integrated chip TPS54140DGQ and a boost converter module integrated chip LT 8331. Since the implementation scheme of the DC-DC conversion module is well-established, the detailed description is omitted here.
The step-down conversion module reduces the power voltage, and different voltages, such as 6V, can be obtained by adjusting circuit parameters. After the time delay turn-off module is switched off, the voltage reduction conversion module provides current for the relay, and because the voltage is reduced, the power consumption is reduced, and the purpose of energy conservation is achieved.
A flyback power supply module is additionally arranged in front of the delay turn-off module and the voltage reduction conversion module, input voltage is connected to the input end of the flyback power supply module, and the flyback power supply module can stabilize the input voltage to a fixed value. Therefore, no matter the input voltage is higher than the relay driving voltage (such as 12V) or lower than the relay holding voltage (such as 6V), the voltage provided after the voltage is stabilized by the flyback power supply module can ensure the normal work of the time delay turn-off module and the voltage reduction conversion module, so that the circuit has stronger universality.
Take the driving voltage 12V and the relay holding voltage 6V as an example. When the input voltage of the power supply is larger than 12V, if the flyback power supply module is not provided, the following relay is burnt out, and the flyback power supply module can reduce the voltage to 12V and then supply the voltage to the following circuit. When the input voltage of the power supply is too small, the power supply uses the low-voltage battery of the vehicle mentioned above, for example, and the low-voltage battery is not charged in time. When the voltage is too small, the voltage may be less than 6V, so that the rear circuit cannot work, and due to the flyback power supply module, the voltage can be increased to 12V firstly and then supplied to the rear circuit, and the rear circuit can be guaranteed to work normally.
From the above, the flyback power module can raise and lower the voltage at the same time, and the buck conversion module can only lower the voltage.
On the basis of the embodiment, the circuit further comprises an anti-reverse module, the anti-reverse module is connected between the output end of the voltage reduction conversion module and the input end of the relay, the input end of the anti-reverse module is connected with the output end of the voltage reduction conversion module, the output end of the anti-reverse module is connected with the input end of the relay, and when the delay turn-off module is conducted, the anti-reverse module prevents the delay turn-off module from being conducted with the voltage reduction conversion module.
The reverse prevention module is connected behind the voltage reduction conversion module. Because the time delay turn-off module and the voltage reduction conversion module are in parallel connection, when the time delay turn-off module is switched on, the output voltage of the time delay turn-off module is greater than that of the voltage reduction conversion module, and current can flow into the voltage reduction conversion module from the time delay turn-off module, so that the reverse prevention module is added, the current can be prevented from flowing backwards, and the voltage reduction conversion module can normally supply power to the relay after the time delay turn-off module is switched off.
As an implementation mode, the reverse prevention module comprises a diode, the anode of the diode is connected with the input end of the buck conversion module, and the cathode of the diode is connected with the input end of the relay.
The technical effects of the present invention will be further described with reference to the background art and the embodiments.
Continuing with the example of drive voltage 12V, relay hold voltage 6V. The power consumed without any power saving circuit is: p ═ UI ═ 12V/28 Ω ═ 5.14W. After adding resistance partial pressure, the relay needs 6V when keeping closed, then also be 6V on the divider resistance, can deduce that the resistance that needs divider resistance is also 28 ohms, adds the power that consumes after resistance partial pressure: p ═ UI ═ 12V/(28 Ω +28 Ω)) ═ 2.57 watts. And in the scheme of the utility model, the voltage is reduced to 6V from 12V, and the power of consumption is: p ═ UI ═ 6V/28 Ω ═ 1.29 watts. It can be seen that the utility model discloses can obtain very showing energy-conserving effect.
Furthermore, the utility model provides an energy storage device, including the above relay energy-saving circuit. The energy storage device can be a portable energy storage power supply, can be placed indoors or in an automobile, is suitable for various types of loads, can be preferably configured with two direct current outputs of 5V and 12V, and can supply power for consumer electronics and vehicle-mounted electric appliances. The system is internally provided with a high-safety storage battery, an advanced battery management system is configured, the long service life of the battery and the safety of the use process can be ensured, and the storage battery can be charged by selecting solar energy, automobile charging and a power grid.
Furthermore, the utility model discloses still provide a vehicle, it includes foretell energy memory. The input voltage may be a low voltage battery of the vehicle, and the controllable switch is controlled by an Electronic Control Unit (ECU) of the vehicle. When the relay needs to be closed, the electronic control unit outputs a control signal for closing the relay, the controllable switch is closed under the control of the electronic control unit, and the direct-current low-voltage electricity of the low-voltage storage battery is transmitted to the delay turn-off module and the voltage reduction conversion module. The delay turn-off module is switched on and outputs driving current to drive the relay to be closed; meanwhile, after the direct-current low-voltage electricity provided by the low-voltage storage battery is subjected to voltage reduction conversion, the voltage reduction conversion module outputs smaller driving direct current to the reverse prevention module, so that the energy consumption of the relay in stable operation is optimized, and the purpose of saving energy is achieved.
The above description is only a preferred embodiment of the application and is illustrative of the principles of the technology employed. It will be appreciated by those skilled in the art that the scope of the disclosure herein is not limited to the particular combination of features described above, but also encompasses other arrangements formed by any combination of the above features or their equivalents without departing from the spirit of the disclosure. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.
Claims (9)
1. A relay power saving circuit, the circuit comprising:
the flyback power supply module is connected with an input voltage at the input end of the flyback power supply module, and can stabilize the input voltage;
the input end of the delay turn-off module is connected with the output end of the flyback power supply module, the output end of the delay turn-off module is connected with the input end of the relay, and the delay turn-off module is switched on to close the relay;
the input end of the step-down conversion module is connected with the output end of the flyback power supply module, the output end of the step-down conversion module is connected with the input end of the relay, the step-down conversion module performs step-down conversion on input voltage and outputs the converted input voltage to the input end of the relay, and output voltage obtained through step-down conversion can ensure that the relay maintains a pull-in state when the delay turn-off module is disconnected.
2. The relay power-saving circuit of claim 1, wherein the input voltage is provided by a power supply, an anode of the power supply is connected to the input terminal of the flyback power module, and a cathode of the power supply is connected to the output terminal of the relay through a controllable switch.
3. The relay power saving circuit of claim 1, wherein the time delay shutdown module comprises:
the input end of the first resistor is connected with an input voltage;
the input end of the capacitor is connected with the output end of the first resistor;
the input end of the second resistor is connected with the output end of the capacitor, and the output end of the second resistor is grounded;
the grid electrode of the first transistor is connected with the output end of the capacitor, and the source electrode of the first transistor is grounded;
the input end of the third resistor is connected with an input voltage;
a gate of the second transistor is connected with an output end of the third resistor, a source of the second transistor is connected with an input voltage, and a drain of the second transistor is connected with the relay;
and the input end of the fourth resistor is connected to the grid electrode of the second transistor and the output end of the third resistor, and the output end of the fourth resistor is connected with the drain electrode of the first transistor.
4. The relay power saving circuit of claim 3, wherein the time delay shutdown module further comprises:
and the input end of the voltage-stabilizing tube is connected with the output end of the capacitor, and the output end of the voltage-stabilizing tube is grounded.
5. The relay power saving circuit according to claim 3 or 4,
the delay time of the delay turn-off module is positively correlated with the sizes of the first resistor, the second resistor and the capacitor.
6. The relay power save circuit of claim 1, further comprising:
the reverse prevention module is connected between the output end of the voltage reduction conversion module and the input end of the relay, the input end of the reverse prevention module is connected with the output end of the voltage reduction conversion module, the output end of the reverse prevention module is connected with the input end of the relay, and when the delay turn-off module is conducted, the reverse prevention module prevents the delay turn-off module from being conducted with the voltage reduction conversion module.
7. The relay power saving circuit of claim 6, wherein the reverse prevention module comprises a diode, the anode of the diode is connected to the input terminal of the buck conversion module, and the cathode of the diode is connected to the input terminal of the relay.
8. An energy storage device, characterized by comprising the relay energy saving circuit of any one of claims 1 to 7.
9. A vehicle characterized by comprising the energy storage device of claim 8.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021996990.6U CN213025952U (en) | 2020-09-11 | 2020-09-11 | Relay energy-saving circuit, energy storage device and vehicle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021996990.6U CN213025952U (en) | 2020-09-11 | 2020-09-11 | Relay energy-saving circuit, energy storage device and vehicle |
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| CN213025952U true CN213025952U (en) | 2021-04-20 |
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| CN202021996990.6U Active CN213025952U (en) | 2020-09-11 | 2020-09-11 | Relay energy-saving circuit, energy storage device and vehicle |
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Effective date of registration: 20231223 Address after: No. 3009, BYD Road, Pingshan District, Shenzhen, Guangdong 518118 Patentee after: BYD Co.,Ltd. Address before: 518118 BYD Road, Pingshan New District, Shenzhen, Guangdong 3009 Patentee before: BYD Co.,Ltd. Patentee before: Shanwei Fudi Battery Co.,Ltd. |