Battery pack alternating current charging prevention protection circuit of fuel warmer
By designing a protection circuit to prevent AC charging of the battery pack in the fuel heater and using an on-off control subcircuit composed of relays, diodes, and transistors, the problem of overcharging or undercharging the battery pack is solved, and stable charging of the battery pack and extended service life are achieved.
Patent Information
- Application Number
- CN202422753718.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-12
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-11-12
AI Technical Summary
The battery packs of existing fuel heaters are prone to overcharging or undercharging during the charging process, which affects battery performance and life and leads to frequent replacement.
A protection circuit for preventing battery packs from AC charging in fuel heaters was designed. The on-off control subcircuit composed of relays, diodes, and transistors, combined with field-effect transistors and resistors, formed a multi-layer protection mechanism to ensure the stability and safety of the battery pack during charging.
It effectively prevents overcharging or undercharging of the battery pack, prolongs the battery life, and improves the stability and safety of the battery.
Smart Images
Figure CN223363877U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of heater battery pack charging protection, and in particular relates to a fuel heater battery pack AC charging protection circuit. Background Art
[0002] Oil heaters are mainly used to generate heat by using oil as fuel and are used for keeping warm. They are light, flexible, small in size, light in weight, powerful, easy to operate, safe and reliable, and use less electricity and oil.
[0003] Existing fuel heaters include an internal battery pack and an external EX_DC power supply. Usually, the internal battery pack and the external EX_DC power supply have different power supply voltages. In the existing technology, the internal battery pack is usually charged by the external EX_DC power supply. However, since the external EX_DC power supply cannot provide a stable charging current, the battery pack is prone to overcharging or undercharging, which affects the performance and life of the battery and requires frequent replacement of the battery pack. Utility Model Content
[0004] Purpose of the utility model: to provide a fuel heater to prevent battery pack AC charging protection circuit, to solve the above problems existing in the prior art.
[0005] Technical solution: A fuel heater battery pack AC charging protection circuit includes an external adapter, the input end of the external adapter is connected to the external AC power, the output end of the external adapter is connected to the input end of the first on-off control subcircuit, the output end of the first on-off control subcircuit is connected to the input end of the second on-off control subcircuit, the output end of the second on-off control subcircuit is simultaneously connected to the input end of the first current subcircuit and the input end of the second current subcircuit, the output end of the first current subcircuit is connected to the battery pack B1, and the output end of the second current subcircuit is connected to the battery pack B2.
[0006] Preferably, the first on-off control subcircuit includes a relay K2, a diode D26, a transistor Q2, a resistor R3 and a resistor R4, wherein pin 3 of the relay K2 is connected to the external adapter, the resistor R3 is connected to pin 4 of the relay K2 and the cathode of the diode D26, the anode of the diode D26 is simultaneously connected to pin 5 of the relay K2 and the collector of the transistor Q2, the emitter of the transistor Q2 is grounded, and the base of the transistor Q2 is connected to the resistor R4.
[0007] Preferably, the relay K2 is a Relay-SPDT relay, the diode D26 is an RS2M diode, and the transistor Q2 is a 7002 transistor.
[0008] Preferably, the second on-off control subcircuit includes a relay K1, a resistor R1, a resistor R2, a diode D25 and a transistor Q1, wherein pin 1 of the relay K1 is connected to the output end of the first on-off control subcircuit, one end of the resistor R1 is simultaneously connected to pin 4 of the relay K1 and the negative electrode of the diode D25, the other end of the resistor R1 is connected to the input end of the first current subcircuit, pin 2 of the relay K1 is connected to the input end of the second current subcircuit, the positive electrode of the diode D25 is simultaneously connected to pin 5 of the relay K1 and the collector of the transistor Q1, the emitter of the transistor Q1 is grounded, and the resistor R2 is connected to the base of the transistor Q1.
[0009] Preferably, the relay K1 is a Relay-SPDT relay, the diode D25 is an RS2M diode, and the transistor Q1 is a 7002 transistor.
[0010] Preferably, the first current sub-circuit includes a field-effect transistor Q34, a field-effect transistor Q35, a resistor R96, a resistor R97, a resistor R98 and a transistor Q36, the source of the field-effect transistor Q35 is connected to the output end of the second on-off control sub-circuit, the gate of the field-effect transistor Q35 is simultaneously connected to the resistor R96 and the gate of the field-effect transistor Q34, the other end of the resistor R96 is simultaneously connected to the drain of the field-effect transistor Q35, the drain of the field-effect transistor Q34 and one end of the resistor R97, the other end of the resistor R97 is connected to the collector of the transistor Q36, the emitter of the transistor Q36 is grounded, and the base of the transistor Q36 is connected to the resistor R98.
[0011] Preferably, the field effect transistor Q34 and the field effect transistor Q35 are both ZM071P03N field effect transistors, and the transistor Q36 is an 8050 transistor.
[0012] Preferably, the second current sub-circuit includes a field-effect transistor Q31, a field-effect transistor Q32, a resistor R93, a resistor R94, a resistor R95 and a transistor Q33, the source of the field-effect transistor Q32 is connected to the output end of the second on-off control sub-circuit, the gate of the field-effect transistor Q32 is simultaneously connected to the resistor R93 and the gate of the field-effect transistor Q31, the other end of the resistor R93 is simultaneously connected to the drain of the field-effect transistor Q32, the drain of the field-effect transistor Q31 and one end of the resistor R94, the other end of the resistor R94 is connected to the collector of the transistor Q33, the emitter of the transistor Q33 is grounded, and the base of the transistor Q33 is connected to the resistor R95.
[0013] Preferably, the field effect transistor Q31 and the field effect transistor Q32 are both ZM071P03N field effect transistors, and the transistor Q33 is an 8050 transistor.
[0014] Beneficial effect: The utility model relates to a protection circuit for preventing battery packs from being charged by AC in a fuel heater. When an external adapter is connected to external AC power, pins 1 and 3 of relay K1 are energized and connected. At this time, the main circuit is powered by the external adapter. When pins 1 and 2 of relay K1 are energized and connected, the battery packs B1 and B2 are charged in cooperation with the first current sub-circuit, the second current sub-circuit and the second on-off control sub-circuit, which can effectively prevent the external AC power connected to the external adapter from charging battery packs B1 and B2. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is the charging protection circuit of the utility model. DETAILED DESCRIPTION
[0016] like Figure 1As shown, the utility model provides a technical solution: a fuel heater battery pack AC charging protection circuit, including an external adapter, the input end of the external adapter is connected to the external AC power, the output end of the external adapter is connected to the input end of the first on-off control subcircuit, the output end of the first on-off control subcircuit is connected to the input end of the second on-off control subcircuit, the output end of the second on-off control subcircuit is simultaneously connected to the input end of the first current subcircuit and the input end of the second current subcircuit, the output end of the first current subcircuit is connected to the battery pack B1, the output end of the second current subcircuit is connected to the battery pack B2, wherein the first on-off control subcircuit The control subcircuit includes a relay K2, a diode D26, a transistor Q2, a resistor R3 and a resistor R4. The relay K2 adopts a Relay-SPDT relay, the diode D26 adopts an RS2M diode, and the transistor Q2 adopts a 7002 transistor. Pin 3 of the relay K2 is connected to the external adapter, the resistor R3 is connected to pin 4 of the relay K2 and the cathode of the diode D26, the anode of the diode D26 is connected to pin 5 of the relay K2 and the collector of the transistor Q2, the emitter of the transistor Q2 is grounded, and the base of the transistor Q2 is connected to the resistor R4. The on-off control subcircuit includes a relay K1, a resistor R1, a resistor R2, a diode D25 and a transistor Q1. The relay K1 adopts a Relay-SPDT relay, the diode D25 adopts an RS2M diode, and the transistor Q1 adopts a 7002 transistor. Pin 1 of the relay K1 is connected to the output end of the first on-off control subcircuit, one end of the resistor R1 is simultaneously connected to pin 4 of the relay K1 and the negative electrode of the diode D25, the other end of the resistor R1 is connected to the input end of the first current subcircuit, and pin 2 of the relay K1 is connected to the input end of the second current subcircuit. The positive electrode of the diode D25 is connected to pin 5 of the relay K1 and the collector of the transistor Q1 at the same time. The emitter of the transistor Q1 is grounded. The resistor R2 is connected to the base of the transistor Q1. When the external adapter is connected to the external AC power, pins 1 and 3 of the relay K1 are energized and connected. At this time, the main circuit is powered by the external adapter. When pins 1 and 2 of the relay K1 are energized and connected, the battery pack B1 and the battery pack B2 are charged in cooperation with the first current sub-circuit, the second current sub-circuit and the second on-off control sub-circuit, which can effectively prevent the external AC power connected to the external adapter from charging the battery pack B1 and the battery pack B2.
[0017] In a further embodiment, the first current sub-circuit includes a field-effect transistor Q34, a field-effect transistor Q35, a resistor R96, a resistor R97, a resistor R98 and a transistor Q36. The field-effect transistor Q34 and the field-effect transistor Q35 are both ZM071P03N field-effect transistors, the transistor Q36 is an 8050 transistor, the source of the field-effect transistor Q35 is connected to the output end of the second on-off control sub-circuit, the gate of the field-effect transistor Q35 is simultaneously connected to the resistor R96 and the gate of the field-effect transistor Q34, the other end of the resistor R96 is simultaneously connected to the drain of the field-effect transistor Q35, the drain of the field-effect transistor Q34 and one end of the resistor R97, the other end of the resistor R97 is connected to the collector of the transistor Q36, the emitter of the transistor Q36 is grounded, and the base of the transistor Q36 is connected to the resistor R98.
[0018] In a further embodiment, the second current sub-circuit includes a field-effect transistor Q31, a field-effect transistor Q32, a resistor R93, a resistor R94, a resistor R95 and a transistor Q33. The field-effect transistor Q31 and the field-effect transistor Q32 are both ZM071P03N field-effect transistors, the transistor Q33 is an 8050 transistor, the source of the field-effect transistor Q32 is connected to the output end of the second on-off control sub-circuit, the gate of the field-effect transistor Q32 is simultaneously connected to the resistor R93 and the gate of the field-effect transistor Q31, the other end of the resistor R93 is simultaneously connected to the drain of the field-effect transistor Q32, the drain of the field-effect transistor Q31 and one end of the resistor R94, the other end of the resistor R94 is connected to the collector of the transistor Q33, the emitter of the transistor Q33 is grounded, and the base of the transistor Q33 is connected to the resistor R95.
[0019] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various equivalent transformations can be made to the technical solutions of the present invention, and these equivalent transformations all fall within the scope of protection of the present invention.
Claims
1. A fuel heater battery pack AC charging protection circuit, characterized in that: It includes an external adapter, the input end of the external adapter is connected to the external AC power, the output end of the external adapter is connected to the input end of the first on-off control subcircuit, the output end of the first on-off control subcircuit is connected to the input end of the second on-off control subcircuit, the output end of the second on-off control subcircuit is simultaneously connected to the input end of the first current subcircuit and the input end of the second current subcircuit, the output end of the first current subcircuit is connected to the battery pack B1, and the output end of the second current subcircuit is connected to the battery pack B2.
2. A fuel heater battery pack AC charging protection circuit according to claim 1, characterized in that: The first on-off control subcircuit includes a relay K2, a diode D26, a transistor Q2, a resistor R3, and a resistor R4. Pin 3 of the relay K2 is connected to the external adapter, the resistor R3 is connected to pin 4 of the relay K2 and the cathode of the diode D26, the anode of the diode D26 is connected to both pin 5 of the relay K2 and the collector of the transistor Q2, the emitter of the transistor Q2 is grounded, and the base of the transistor Q2 is connected to the resistor R4.
3. A fuel heater battery pack AC charging protection circuit according to claim 2, characterized in that: The relay K2 is a Relay-SPDT relay, the diode D26 is an RS2M diode, and the transistor Q2 is a 7002 transistor.
4. A fuel heater battery pack AC charging protection circuit according to claim 1, characterized in that: The second on-off control subcircuit includes a relay K1, a resistor R1, a resistor R2, a diode D25, and a transistor Q1. Pin 1 of the relay K1 is connected to the output end of the first on-off control subcircuit, one end of the resistor R1 is simultaneously connected to pin 4 of the relay K1 and the cathode of the diode D25, the other end of the resistor R1 is connected to the input end of the first current subcircuit, pin 2 of the relay K1 is connected to the input end of the second current subcircuit, the anode of the diode D25 is simultaneously connected to pin 5 of the relay K1 and the collector of the transistor Q1, the emitter of the transistor Q1 is grounded, and the resistor R2 is connected to the base of the transistor Q1.
5. A fuel heater battery pack AC charging protection circuit according to claim 4, characterized in that: The relay K1 is a Relay-SPDT relay, the diode D25 is an RS2M diode, and the transistor Q1 is a 7002 transistor.
6. A fuel heater battery pack AC charging protection circuit according to claim 1, characterized in that: The first current sub-circuit includes a field-effect transistor Q34, a field-effect transistor Q35, a resistor R96, a resistor R97, a resistor R98, and a transistor Q36. The source of the field-effect transistor Q35 is connected to the output end of the second on-off control sub-circuit, the gate of the field-effect transistor Q35 is connected to both the resistor R96 and the gate of the field-effect transistor Q34, the other end of the resistor R96 is connected to both the drain of the field-effect transistor Q35, the drain of the field-effect transistor Q34, and one end of the resistor R97, the other end of the resistor R97 is connected to the collector of the transistor Q36, the emitter of the transistor Q36 is grounded, and the base of the transistor Q36 is connected to the resistor R98.
7. A fuel heater battery pack AC charging protection circuit according to claim 6, characterized in that: The field effect tube Q34 and the field effect tube Q35 are both ZM071P03N field effect tubes, and the transistor Q36 is an 8050 transistor.
8. The fuel heater battery pack AC charging protection circuit according to claim 1, characterized in that: The second current sub-circuit includes a field-effect transistor Q31, a field-effect transistor Q32, a resistor R93, a resistor R94, a resistor R95, and a transistor Q33. The source of the field-effect transistor Q32 is connected to the output end of the second on-off control sub-circuit, the gate of the field-effect transistor Q32 is connected to both the resistor R93 and the gate of the field-effect transistor Q31, the other end of the resistor R93 is connected to both the drain of the field-effect transistor Q32, the drain of the field-effect transistor Q31, and one end of the resistor R94, the other end of the resistor R94 is connected to the collector of the transistor Q33, the emitter of the transistor Q33 is grounded, and the base of the transistor Q33 is connected to the resistor R95.
9. A fuel heater battery pack AC charging protection circuit according to claim 8, characterized in that: The field effect tube Q31 and the field effect tube Q32 are both ZM071P03N field effect tubes, and the transistor Q33 is an 8050 transistor.