Model airplane battery discharge protection circuit

Abstract

The invention discloses a model airplane battery discharge protection circuit. Comprising a model airplane battery, a battery protection circuit, a relay, a first load and a second load, the model airplane battery is connected with a battery protection circuit and a first load, the battery protection circuit is connected with a relay and a second load, and the relay is connected with a first load circuit; the battery protection circuit controls the on-off of the relay and the second load; the on-off of the first load is controlled by the relay and the second load; when the output voltage of the model airplane battery is lower than a set voltage threshold value, the battery protection circuit starts discharge protection and controls the second load and the relay to be disconnected; and when the second load is disconnected and the relay is disconnected, controlling the first load to be disconnected. When the circuit is controlled to be switched on and switched off, the heating value of components is remarkably reduced, a heat dissipation circuit and electric appliance isolation provided by a relay do not need to be independently arranged, the safety of the circuit is improved, and the circuit is simple in structure and high in stability.

Description

Technical Field

[0001] The present disclosure generally relates to the technical field of battery discharge protection, and in particular to a battery discharge protection circuit for a model aircraft based on a relay. Background Art

[0002] In the prior art, the protection circuit of lithium batteries generally uses field effect transistors or Zener diodes. This method has a serious problem of heating of circuit components and requires additional heat sinks. It is not friendly to circuits with high integration and high quality requirements. At the same time, the discharge protection circuit using field effect transistors is highly complex, which increases the design cost and the difficulty of fault point troubleshooting, resulting in poor circuit flexibility.

[0003] Therefore, it is hoped that there will be a more scientific battery discharge protection circuit for model aircraft to solve the problems existing in the prior art. Summary of the invention

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide a discharge protection circuit for a battery of a model aircraft, which can meet the current discharge protection requirements for the battery of a model aircraft.

[0005] Based on one aspect of an embodiment of the present invention, the embodiment of the present application provides a model aircraft battery discharge protection circuit, including:

[0006] Model aircraft battery, battery protection circuit, relay and first load and second load;

[0007] The model aircraft battery is connected to the battery protection circuit and the first load, and the battery protection circuit is connected to the relay and the second load;

[0008] The relay is connected to the first load;

[0009] The battery protection circuit controls the on and off of the relay and the on and off of the second load;

[0010] The on and off of the relay and the on and off of the second load control the on and off of the first load;

[0011] When the output voltage of the aircraft model battery is lower than the set voltage threshold, the battery protection circuit starts the discharge protection, controls the second load to be disconnected, and the relay to be disconnected;

[0012] When the second load is disconnected and the relay is disconnected, controlling the first load to be disconnected;

[0013] The first load is a high current load;

[0014] The second load is a load of the battery protection circuit.

[0015] In another embodiment, the voltage of the aircraft model battery is 15 volts, the continuous discharge current is 27 amps, the operating voltage of the battery protection circuit is 15 volts, the maximum current is 30 amps, and the operating current of the relay is 30 amps.

[0016] In another embodiment, the output voltage of the aircraft model battery is set to a voltage threshold of 14.8 volts.

[0017] In the embodiment of the present application, a model aircraft battery, a battery protection circuit, a relay, a first load and a second load are provided; the model aircraft battery is connected to the battery protection circuit and the first load, and the battery protection circuit is connected to the relay and the second load; the battery protection circuit controls the on and off of the relay and the on and off of the second load; the on and off of the first load is controlled by the on and off of the relay and the on and off of the second load; when the output voltage of the model aircraft battery is lower than the set voltage threshold, the battery protection circuit starts the discharge protection, controls the second load to be disconnected, and the relay to be disconnected; when the second load is disconnected and the relay is disconnected, the first load is controlled to be disconnected. The discharge protection circuit of the present application significantly reduces the heat generated by the components when the circuit is turned on and off, and there is no need to set up a heat dissipation circuit separately. The electrical isolation provided by the relay improves the safety of the circuit, so that the circuit of the present application can handle a larger current. The circuit structure of the present application is simple, easy to troubleshoot and maintain fault problems, and has strong stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Other features, objects and advantages of the present application will become more apparent by reading the detailed description of non-limiting embodiments made with reference to the following drawings:

[0019] Figure 1 This is a circuit diagram of a battery discharge protection circuit for a model aircraft provided by an embodiment of the present application.

[0020] In the figure, 100 is the aircraft model battery, 200 is the battery protection circuit, 300 is the relay, 400 is the first load, and 500 is the second load. DETAILED DESCRIPTION

[0021] The present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the relevant invention, rather than to limit the invention. It is also necessary to explain that, for ease of description, only the parts related to the invention are shown in the accompanying drawings.

[0022] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0023] Please refer to Figure 1 , which shows a circuit diagram of a discharge protection circuit for a model aircraft battery that can be applied to an embodiment of the present application.

[0024] like Figure 1 As shown, the aircraft model battery discharge protection circuit includes: an aircraft model battery 100, a battery protection circuit 200, a relay 300, a first load 400, and a second load 500;

[0025] The aircraft model battery 100 is connected to the battery protection circuit 200 and the first load 400, and the battery protection circuit 200 is connected to the relay 300 and the second load 500;

[0026] The relay 300 is connected to the first load 400;

[0027] The battery protection circuit 200 controls the on / off of the relay 300 and the on / off of the second load 500;

[0028] The on / off of the relay 300 and the on / off of the second load 500 control the on / off of the first load 400;

[0029] When the output voltage of the aircraft model battery 100 is lower than the set voltage threshold, the battery protection circuit 200 starts the discharge protection, controls the second load 500 to be disconnected, and the relay 300 to be disconnected;

[0030] When the second load 500 is disconnected and the relay 300 is disconnected, the first load 400 is controlled to be disconnected;

[0031] The first load 400 is a high current load;

[0032] The second load 500 is a load of the battery protection circuit 200 .

[0033] The voltage of the aircraft model battery 100 is 15 volts, and the continuous discharge current is 27 amps. The operating voltage of the battery protection circuit 200 is 15 volts, and the maximum current is 30 amps. The operating current of the relay 300 is 30 amps.

[0034] The output voltage of the aircraft model battery 100 is set to a voltage threshold of 14.8 volts.

[0035] Specifically, during the implementation process, the maximum current that the first load 400 can carry can reach 60A, and the second load 500 is the load of the battery protection circuit 200, and the current of the load is relatively small. After the aircraft model battery 100 is continuously discharged, if its output voltage is lower than a certain voltage value, it may cause damage to the electrical equipment, and it may also cause over-discharge damage to the aircraft model battery 100. The discharge voltage of the aircraft model battery 100 is monitored in real time by the battery protection circuit 200. When the discharge voltage of the aircraft model battery 100 is lower than the set threshold, the battery discharge protection is immediately started. At this time, the battery protection The circuit 200 will disconnect the relay 300 and the second load 500 it carries to prevent the aircraft model battery 100 from continuing to discharge and causing over-discharge. At this time, since the relay 300, the second load 500 and the first load 400 are in a parallel relationship, when the second load 500 is disconnected and the relay 300 is disconnected, the first load 400 will be controlled to be disconnected. In this way, all loads connected to the aircraft model battery 100 are in a disconnected state, and the aircraft model battery 100 will no longer be consumed by the load and will stop discharging, thereby achieving the purpose of battery protection for the aircraft model battery 100.

[0036] Since the relay 300 controls the on and off of the first load 400, and the heat generated by the relay 300 is relatively small, there is no need for a separate heat dissipation circuit to dissipate heat for the circuit of the present application, making the circuit as a whole simpler. Since the relay 300 provides electrical isolation between the second load 500 and the first load 400, thereby improving the safety between the first load 400 and the battery protection circuit 200, the relay 300 can handle a larger current, so the first load 400 can withstand a larger current. At the same time, since the control of the relay 300 is relatively simple, the battery protection circuit 200 only needs to send a voltage signal to achieve disconnection, making the circuit very simple.

[0037] The units or modules involved in the embodiments described in the present application may be implemented by software or hardware. The units or modules described may also be arranged in a processor. The names of these units or modules do not constitute limitations on the units or modules themselves in certain circumstances.

[0038] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the inventive concept. For example, the above features are replaced with (but not limited to) technical features with similar functions disclosed in the present application.

Claims

1. A model aircraft battery discharge protection circuit, characterized in that: include: Model aircraft battery, battery protection circuit, relay and first load and second load; The aircraft model battery is connected to the battery protection circuit and the first load, and the battery protection circuit is connected to the relay and the second load; The relay is connected to the first load; The battery protection circuit controls the on and off of the relay and the on and off of the second load; The on and off of the relay and the on and off of the second load control the on and off of the first load; When the output voltage of the aircraft model battery is lower than the set voltage threshold, the battery protection circuit starts the discharge protection, controls the second load to be disconnected, and the relay to be disconnected; When the second load is disconnected and the relay is disconnected, controlling the first load to be disconnected; The first load is a high current load; The second load is a load of the battery protection circuit.

2. The circuit according to claim 1, characterized in that The voltage of the aircraft model battery is 15 volts, the continuous discharge current is 27 amps, the working voltage of the battery protection circuit is 15 volts, the maximum current is 30 amps, and the working current of the relay is 30 amps.

3. The circuit according to claim 2, characterized in that The output voltage of the aircraft model battery is set to a voltage threshold of 14.8 volts.

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