CN219329623U - Circuit for indicating normal and under-voltage states of battery - Google Patents
Circuit for indicating normal and under-voltage states of battery Download PDFInfo
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- CN219329623U CN219329623U CN202222909113.6U CN202222909113U CN219329623U CN 219329623 U CN219329623 U CN 219329623U CN 202222909113 U CN202222909113 U CN 202222909113U CN 219329623 U CN219329623 U CN 219329623U
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Abstract
The utility model relates to the field of circuits and discloses a circuit for indicating normal and under-voltage states of a battery, which comprises a battery BT1, a voltage stabilizing tube ZD1, a triode Q1, a light emitting diode LED1, a voltage stabilizing tube ZD2, a triode Q2, a light emitting diode LED2 and a plurality of current limiting resistors for protecting elements in the circuit. The cathode of the voltage stabilizing tube ZD1 is connected with the positive electrode of the battery BT1, and the anode is connected with the base electrode of the triode Q1. The anode of the light emitting diode LED1 is respectively connected with the anode of the battery BT1 and the emitter of the triode Q1, and the cathode is respectively connected with the cathode of the battery BT1 and the collector of the triode Q1. The cathode of the voltage stabilizing tube ZD2 is connected with the positive electrode of the battery BT1, and the anode is connected with the base electrode of the triode Q2. The anode of the light emitting diode LED2 is connected with the anode of the battery BT1, and the cathode is connected with the emitter of the triode Q2. The collector of the triode Q2 is connected with the cathode of the battery BT 1. The utility model can visually indicate the electricity consumption condition of the battery and remind a user to effectively and reasonably protect the battery. Meanwhile, the circuit structure is simple, and the production cost can be reduced.
Description
Technical Field
The utility model relates to the field of circuits, in particular to a circuit for indicating normal and under-voltage states of a battery.
Background
With the development and progress of technology, various electronic products are developed, so that the amateur life of people is increasingly enriched, various small household appliances, electric toys and the like are mostly provided with matched rechargeable batteries, and for some low-unit price products, a perfect battery management system is not matched. When the rechargeable battery is excessively discharged for use, the service life of the battery core is shortened and even the battery core is invalid, and the electric quantity cannot be re-charged again, so that the battery is damaged. However, some existing battery management systems are complex, have high use cost, and are not suitable for use in some low-cost products. There is therefore a need for a low cost battery management solution to this problem.
Disclosure of Invention
The utility model aims to provide a circuit for indicating the normal and under-voltage states of a battery, which can visually indicate the electricity consumption condition of the battery aiming at the normal working state of the battery and the preset under-voltage, remind a user to effectively and reasonably protect the battery, charge the under-voltage battery in time, prevent the service life of a battery core from being shortened or even losing efficacy due to over-discharge of the battery and is beneficial to cost control. Meanwhile, the circuit is simple, and the manufacturing cost is low.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model discloses a circuit for indicating normal and under-voltage states of a battery, which comprises a battery BT1, a voltage stabilizing tube ZD1, a triode Q1, a light emitting diode LED1, a voltage stabilizing tube ZD2, a triode Q2, a light emitting diode LED2 and a plurality of current limiting resistors for protecting elements in the circuit.
The cathode of the voltage stabilizing tube ZD1 is connected with the positive electrode of the battery BT1, and the anode is connected with the base electrode of the triode Q1.
The anode of the light emitting diode LED1 is respectively connected with the anode of the battery BT1 and the emitter of the triode Q1, and the cathode is respectively connected with the cathode of the battery BT1 and the collector of the triode Q1.
The cathode of the voltage stabilizing tube ZD2 is connected with the positive electrode of the battery BT1, and the anode is connected with the base electrode of the triode Q2.
The anode of the light emitting diode LED2 is connected with the anode of the battery BT1, and the cathode is connected with the emitter of the triode Q2.
The collector of the triode Q2 is connected with the cathode of the battery BT 1.
When the operating voltage of the battery BT1 is within the set voltage range, that is, the voltage is greater than the avalanche voltage of the voltage stabilizing tube ZD1 and the voltage stabilizing tube ZD2 (the avalanche voltage can select the corresponding voltage stabilizing tube according to the actual situation), the voltage stabilizing tube ZD1 and the voltage stabilizing tube ZD2 are respectively reverse breakdown-conducted, the triode Q1 and the triode Q2 are both conducted, and the light emitting diode LDE1 is not lightened; the light emitting diode LED2 is illuminated.
When the voltage of the battery BT1 is in an under-voltage state and is not in a set voltage range, the voltage is smaller than avalanche voltage of the voltage stabilizing tube ZD1 and the voltage stabilizing tube ZD2, the voltage stabilizing tube ZD1 and the voltage stabilizing tube ZD2 are in a reverse connection cut-off state, the triode Q1 and the triode Q2 do not work, and the light emitting diode LDE1 is bright; the light emitting diode LED2 is not illuminated.
Whether the battery is under-voltage or not can be visually indicated through the on-off state of the light emitting diode. When the diode LED1 is turned on, the battery is in an under-voltage state, and needs to be charged in time.
Further, the current limiting resistor comprises a resistor R1, a resistor R3, a resistor R4 and a resistor R5. One end of the resistor R1 is connected with the anode of the voltage stabilizing tube ZD1, and the other end of the resistor R1 is connected with the base electrode of the triode Q1. One end of the resistor R3 is connected with the anode of the battery BT1, and the other end of the resistor R is respectively connected with the anode of the light emitting diode LED1 and the emitter of the triode Q1. One end of the resistor R4 is connected with the anode of the voltage stabilizing tube ZD2, and the other end is connected with the base electrode of the triode Q2. One end of the resistor R5 is connected with the anode of the battery BT1, and the other end of the resistor R is connected with the anode of the light emitting diode LED 2.
Further, the circuit also comprises an anti-interference resistor R2; one end of the resistor R2 is connected with the cathode of the battery BT1, and the other end of the resistor R2 is respectively connected with the base electrode of the triode Q1 and one end of the resistor R1.
Further, the triode Q1 and the triode Q2 are NPN type triodes.
Further, the light emitting diode LED1 is a red light, and the light emitting diode LED2 is a green light.
The utility model has the advantages that:
according to the utility model, whether the working voltage of the battery BT1 is in the set normal voltage range can be judged according to the on-off conditions of the light emitting diode LED1 and the light emitting diode LED2, the battery power consumption condition is visually indicated, a user is reminded to effectively and reasonably protect the battery, the undervoltage battery is timely charged, the service life of the battery core is prevented from being shortened or even losing efficacy due to over-discharge of the battery, and the cost control is facilitated. Meanwhile, the circuit has simple structure, fewer devices and nodes are needed, the production cost and the circuit power consumption can be reduced, and the circuit can be applied to low-unit-price products.
Drawings
Fig. 1 is a circuit diagram of the present utility model.
Detailed Description
In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be described in further detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, the utility model discloses a circuit for indicating normal and under-voltage states of a battery, which comprises a battery BT1, a voltage stabilizing tube ZD1, a triode Q1, a light emitting diode LED1, a voltage stabilizing tube ZD2, a triode Q2, a light emitting diode LED2, and a plurality of current limiting resistors and anti-interference resistors R2 for protecting elements in the circuit. The current limiting resistor comprises a resistor R1, a resistor R3, a resistor R4 and a resistor R5, the triode Q1 and the triode Q2 are NPN triodes, the light emitting diode LED1 is a red light, and the light emitting diode LED2 is a green light.
The concrete connection is as follows:
the cathode of the voltage stabilizing tube ZD1 is connected with the positive electrode of the battery BT1, the anode is connected with one end of a resistor R1, the other end of the resistor R1 is respectively connected with the base electrode of the triode Q1 and one end of a resistor R2, and the other end of the resistor R2 is connected with the negative electrode of the battery BT 1.
The anode of the light-emitting diode LED1 is respectively connected with one end of a resistor R3 and the emitter of a triode Q1, and the other end of the resistor R3 is connected with the anode of the battery BT 1; the cathode of the light emitting diode LED1 is connected to the collector of the transistor Q1 and the negative electrode of the battery BT1, respectively.
The cathode of the voltage stabilizing tube ZD2 is connected with the positive electrode of the battery BT1, and the anode is connected with one end of the resistor R4; the other end of the resistor R4 is connected with the base electrode of the triode Q2.
The anode of the light emitting diode LED2 is connected to one end of a resistor R5, and the other end of the resistor R5 is connected to the positive electrode of the battery BT 1. The cathode of the light emitting diode LED2 is connected to the emitter of the transistor Q2. The collector of the triode Q2 is connected with the cathode of the battery BT 1.
When the working voltage of the battery BT1 is within a set voltage range, namely the voltage is larger than the avalanche voltage of the voltage stabilizing tube ZD1 and the voltage stabilizing tube ZD2 (the avalanche voltage can be selected according to the actual situation), the voltage stabilizing tube ZD1 and the voltage stabilizing tube ZD2 are reversely broken down and conducted, the battery voltage is divided by the resistor R1 and the resistor R2, the base electrode of the triode Q1 is positively biased, the triode Q1 is conducted, the light emitting diode LED1 (red light) is directly short-circuited, at the moment, the light emitting diode LED1 (red light) is not on, and the anode of the battery BT1 forms a loop through the resistor R3 and the triode Q1 to the cathode of the battery BT 1.
The other path of battery voltage is limited by a resistor R4 and then is supplied to the positive bias voltage of the base electrode of a triode Q2, the triode Q2 is conducted, the anode of a battery BT1 passes through a resistor R5, a light emitting diode LED2 (green light), the cathodes of the triodes Q2 to BT1 form a loop, and the light emitting diode LED2 (green light) works normally. I.e. when the battery is operating in the normal voltage range, the light emitting diode LED2 (green light) is on and the light emitting diode LED1 (red light) is off.
When the voltage of the battery BT1 is discharged to be lower than a preset value (slightly higher than the lowest threshold value), the voltage flowing through the voltage stabilizing tube ZD1 is lower than the voltage stabilizing value, the voltage stabilizing tube is in a reverse connection cut-off state, the voltage of the base electrode of the triode Q1 is reduced to 0V, the triode Q1 does not work, the positive electrode of the battery BT1 forms a loop through the resistor R3, the light emitting diode LED1 (red light) is connected to the negative electrode of the battery BT1, and the light emitting diode LED1 (red light) works normally.
The other path of battery voltage is lower than the voltage stabilizing value through the voltage stabilizing tube ZD2, the voltage stabilizing tube is in a reverse connection cut-off state, the voltage of the base electrode of the triode Q2 is reduced to 0V, the triode Q2 does not work, the light emitting diode LED2 (green light) cannot form a loop through the triode Q2, and the battery voltage is in a non-working state, namely the light emitting diode LED1 (red light) is on after the battery voltage is undervoltage, and the light emitting diode LED2 (green light) is off.
When the LED is used, whether the battery is under-voltage can be visually indicated through the on-off state of the LED. When the diode LED1 is turned on, the battery is in an under-voltage state, and needs to be charged in time. And the battery is prevented from shortening the service life of the battery core or even losing efficacy due to overdischarge, and the cost control is facilitated.
In summary, the utility model can judge whether the working voltage of the battery BT1 is within the set normal voltage range according to the on-off condition of the light emitting diode LED1 and the light emitting diode LED2, visually indicate the battery power consumption condition, remind the user to effectively and reasonably protect the battery and charge the undervoltage battery in time. Meanwhile, the indicating circuit has simple structure, fewer needed devices and nodes, reduced production cost and circuit power consumption, and can be applied to low-unit-price products.
The present utility model is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present utility model are intended to be included in the scope of the present utility model.
Claims (5)
1. A circuit for indicating normal and under-voltage conditions of a battery, comprising: the LED protection circuit comprises a battery BT1, a voltage stabilizing tube ZD1, a triode Q1, a light emitting diode LED1, a voltage stabilizing tube ZD2, a triode Q2, a light emitting diode LED2 and a plurality of current limiting resistors for protecting elements in the circuit;
the cathode of the voltage stabilizing tube ZD1 is connected with the positive electrode of the battery BT1, and the anode is connected with the base electrode of the triode Q1;
the anode of the light emitting diode LED1 is respectively connected with the anode of the battery BT1 and the emitter of the triode Q1, and the cathode is respectively connected with the cathode of the battery BT1 and the collector of the triode Q1;
the cathode of the voltage stabilizing tube ZD2 is connected with the positive electrode of the battery BT1, and the anode is connected with the base electrode of the triode Q2;
the anode of the light emitting diode LED2 is connected with the anode of the battery BT1, and the cathode is connected with the emitter of the triode Q2;
the collector of the triode Q2 is connected with the cathode of the battery BT 1.
2. The circuit for battery normal and under-voltage condition indication of claim 1, wherein: the current limiting resistor comprises a resistor R1, a resistor R3, a resistor R4 and a resistor R5;
one end of the resistor R1 is connected with the anode of the voltage stabilizing tube ZD1, and the other end of the resistor R1 is connected with the base electrode of the triode Q1;
one end of the resistor R3 is connected with the anode of the battery BT1, and the other end of the resistor R is respectively connected with the anode of the light-emitting diode LED1 and the emitter of the triode Q1;
one end of the resistor R4 is connected with the anode of the voltage stabilizing tube ZD2, and the other end of the resistor R is connected with the base electrode of the triode Q2;
one end of the resistor R5 is connected with the anode of the battery BT1, and the other end of the resistor R is connected with the anode of the light emitting diode LED 2.
3. The circuit for battery normal and under-voltage condition indication of claim 2, wherein: the anti-interference resistor R2 is also included; one end of the resistor R2 is connected with the cathode of the battery BT1, and the other end of the resistor R2 is respectively connected with the base electrode of the triode Q1 and one end of the resistor R1.
4. A circuit for indicating a battery condition as defined in any one of claims 1-3, wherein: the triode Q1 and the triode Q2 are NPN type triodes.
5. A circuit for indicating a battery condition as defined in any one of claims 1-3, wherein: the light emitting diode LED1 is a red light, and the light emitting diode LED2 is a green light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222909113.6U CN219329623U (en) | 2022-10-31 | 2022-10-31 | Circuit for indicating normal and under-voltage states of battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222909113.6U CN219329623U (en) | 2022-10-31 | 2022-10-31 | Circuit for indicating normal and under-voltage states of battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219329623U true CN219329623U (en) | 2023-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222909113.6U Active CN219329623U (en) | 2022-10-31 | 2022-10-31 | Circuit for indicating normal and under-voltage states of battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219329623U (en) |
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2022
- 2022-10-31 CN CN202222909113.6U patent/CN219329623U/en active Active
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| GR01 | Patent grant | ||
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Address after: 361000 Xiamen Torch High tech Zone (Xiang'an) Industrial Zone, Xianghai Second Road, Xiamen City, Fujian Province, China, Accelerator Phase III, Building 3 Patentee after: XIAMEN XUNHENG ELECTRONICS TECH Co.,Ltd. Country or region after: China Address before: Room 3047, Xuanye building, Chuangye Park, torch high tech Zone, Xiamen City, Fujian Province Patentee before: XIAMEN XUNHENG ELECTRONICS TECH Co.,Ltd. Country or region before: China |
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| CP03 | Change of name, title or address |