CN206272289U - A kind of Vehicular accumulator cell undervoltage detection circuit - Google Patents
A kind of Vehicular accumulator cell undervoltage detection circuit Download PDFInfo
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- CN206272289U CN206272289U CN201621380988.XU CN201621380988U CN206272289U CN 206272289 U CN206272289 U CN 206272289U CN 201621380988 U CN201621380988 U CN 201621380988U CN 206272289 U CN206272289 U CN 206272289U
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- accumulator cell
- vehicular accumulator
- detection circuit
- resistor
- triode
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Abstract
The utility model is related to a kind of circuit, a kind of Vehicular accumulator cell undervoltage detection circuit is specifically disclosed, is connected with Vehicular accumulator cell, the detection circuit includes on-vehicle player and MCU, with MCU as control core, MCU is connected with DC DC power modules, power sense circuit and electronic switch；The DC DC power modules are also connected with Vehicular accumulator cell；The power sense circuit is also connected with Vehicular accumulator cell；The electronic switch is also connected with Vehicular accumulator cell and on-vehicle player respectively.Circuit structure of the present utility model is simple, is easy to repacking with operation, the low cost of realization.
Description
Technical field
The utility model is related to a kind of detection circuit, and in particular to be a kind of Vehicular accumulator cell undervoltage detection circuit.
Background technology
On-vehicle player be it is a kind of designed exclusively for vehicles such as bus, big mini bus, coaches it is vehicle-mounted
Amusement equipment.General on-vehicle player has 2 kinds of power voltage supplies, is respectively 12V and 24V.With the on-vehicle player of 12V power voltage supplies
As a example by：Power is larger when being worked due to on-vehicle player, and when automobile also non-retrofire, Vehicular accumulator cell cannot charge, and
On-vehicle player continuous firing can cause that Vehicular accumulator cell further reduces voltage, when vehicular electricity storage cell voltage drops to automobile
When below the lower voltage limit that igniting starts, automobile will be unable to start.
The content of the invention
The purpose of this utility model is exactly in order in solving the problems, such as above-mentioned background technology, so as to provide a kind of vehicle-mounted storage
Battery undervoltage detects circuit, and the detection circuit can detect Vehicular accumulator cell brownout but also start voltage in automotive ignition
When more than lower limit, on-vehicle player is closed, Vehicular accumulator cell is not persistently reduced voltage again.
In order to solve the above-mentioned technical problem, the technical scheme that the utility model is used is：A kind of Vehicular accumulator cell is under-voltage
Detection circuit, is connected with Vehicular accumulator cell, and the detection circuit includes on-vehicle player, it is characterised in that also including MCU, with
MCU is control core, and MCU is connected with DC-DC power module, power sense circuit and electronic switch；The DC-DC power module
Also it is connected with Vehicular accumulator cell；The power sense circuit is also connected with Vehicular accumulator cell；The electronic switch also respectively with car
Carry battery and on-vehicle player connection.
Preferably：The power sense circuit is by light emitting diode, first resistor, second resistance, 3rd resistor, the 4th electricity
Resistance, the first triode, the second triode and commutation diode are constituted；One end of the light emitting diode connects with Vehicular accumulator cell
Connect, the other end is connected with one end of first resistor；The other end of the first resistor is connected with the colelctor electrode of the first triode；Institute
The grounded emitter of the first triode is stated, its base stage is connected with one end of second resistance；The other end difference of the second resistance
The colelctor electrode of connection 3rd resistor and the second triode；The other end of the 3rd resistor is connected with Vehicular accumulator cell；Described
The grounded emitter of two triodes, its base stage is connected with one end of the 4th resistance；The other end of the 4th resistance and rectification two
The positive pole connection of pole pipe；The negative pole of the commutation diode is connected with Vehicular accumulator cell.
Preferably：The light emitting diode is red light emitting diodes.
The beneficial effects of the utility model are：The detection circuit employs the component of low cost, on on-vehicle player
Install the undervoltage detection circuit of Vehicular accumulator cell additional, when the non-retrofire of automobile, on-vehicle player detection vehicular electricity storage cell voltage
It is too low but also automotive ignition start voltage lower limit more than when, close on-vehicle player, Vehicular accumulator cell is not continued again
Reduce voltage；After automotive ignition starts, Vehicular accumulator cell gos up by charged voltage, and on-vehicle player detects vehicle-mounted storage
Cell voltage has been in normal working voltage scope, and on-vehicle player power supply is now opened again；So ensure that automobile
Clean boot, reduces risk.
Circuit structure of the present utility model is simple, reequips more convenient, low cost, easily realizes and operation.
Brief description of the drawings
Fig. 1, composition block diagram of the present utility model；
Fig. 2, a kind of implementation structured flowchart of the present utility model.
Specific embodiment
Below in conjunction with the accompanying drawings and preferred scheme makees further details of theory to specific embodiment of the present utility model
It is bright.
As shown in Figure 1, it is composition block diagram of the present utility model, specifically a kind of Vehicular accumulator cell undervoltage detection circuit,
It is connected with Vehicular accumulator cell 10, the detection circuit includes on-vehicle player 1, MCU 2, DC-DC power module 3, power detecting electricity
Road 4 and electronic switch 5, with MCU 2 as control core, MCU 2 respectively with DC-DC power module 3, power sense circuit 4, electronics
Switch 5 is connected；The DC-DC power module 3 is also connected with Vehicular accumulator cell 10；The power sense circuit 4 also with vehicle-mounted storage
Battery 10 is connected；The electronic switch 5 is also connected with Vehicular accumulator cell 10 and on-vehicle player 1 respectively.
Preferred scheme：The power sense circuit 4 is by LED 1, first resistor R1, second resistance R2,
Three resistance R3, the 4th resistance R4, the first triode Q1, the second triode Q2 and commutation diode D1 are constituted；The light-emitting diodes
One end of pipe LED1 is connected with Vehicular accumulator cell 10, and the other end is connected with one end of first resistor R1；The first resistor R1's
The other end is connected with the colelctor electrode of the first triode Q1；The grounded emitter of the first triode Q1, its base stage and the second electricity
Hinder one end connection of R2；The other end of the second resistance R2 connects the current collection of 3rd resistor R3 and the second triode Q2 respectively
Pole；The other end of the 3rd resistor R3 is connected with Vehicular accumulator cell 10；The grounded emitter of the second triode Q2, its base
Pole is connected with one end of the 4th resistance R4；The other end of the 4th resistance R4 is connected with the positive pole of commutation diode D1；It is described
The negative pole of commutation diode D1 is connected with Vehicular accumulator cell 10.
Preferably：The LED 1 is red light emitting diodes.
Embodiment：The present embodiment combination accompanying drawing 2 and specific parameter are illustrated, in the electrical schematic diagram shown in accompanying drawing 2,
When automobile does not light a fire startup, power sense circuit 4 detects the voltage of Vehicular accumulator cell 10, when the voltage of Vehicular accumulator cell 10 is small
When 10V, there is the pressure drop of 9.3V because of commutation diode D1, the base stage of the second triode Q2 needs more than the 0.7V could to turn on, institute
Ended with now the second triode Q2；The voltage of Vehicular accumulator cell 10 makes the one or three pole by second resistance R2 and 3rd resistor R3
Pipe Q1 is turned on, and LED 1 is turned on by the first triode Q1, and now red light is lighted；When MCU 2 receives power supply inspection
The low level signal A, MCU 2 that slowdown monitoring circuit 4 sends sends control signal, so as to disconnect electronic switch 5, on-vehicle player 1 stops
Work.
After automotive ignition starts, the voltage of Vehicular accumulator cell 10 starts to charge up rise, when power sense circuit 4 is detected
When the voltage of Vehicular accumulator cell 10 is more than or equal to 10V, the voltage of Vehicular accumulator cell 10 has the pressure of 9.3V by commutation diode D1
Drop, the base stage of the second triode Q2 has the pressure drop of 0.7V, the second triode Q2 conductings；The now base voltage of the first triode Q1
It is 0V, the first triode Q1 cut-offs, the red light of LED 1 is knocked out；Now MCU 2 receives power sense circuit 4
High level signal A, MCU 2 sends control signal closes electronic switch 5, and on-vehicle player 1 is started working.
After on-vehicle player of the present utility model 1 installs the undervoltage detection circuit of Vehicular accumulator cell additional, just can effectively keep away
Exempt to cause the voltage continuous decrease of Vehicular accumulator cell 10 because of the continuous firing of on-vehicle player 1 so that automobile cannot light a fire startup.
Because undervoltage detection circuit of the present utility model is fairly simple, repacking is also more convenient, so the repacking cost of on-vehicle player 1 is not
Can increase how much.
Claims (3)
1. a kind of Vehicular accumulator cell undervoltage detection circuit, with Vehicular accumulator cell（10）Connection, the detection circuit includes vehicle-mounted broadcasting
Put machine（1）, it is characterized in that：Also include MCU（2）, with MCU as control core, MCU is connected with DC-DC power module（3）, power supply
Detection circuit（4）And electronic switch（5）；The DC-DC power module is also connected with Vehicular accumulator cell；The power sense circuit
Also it is connected with Vehicular accumulator cell；The electronic switch is also connected with Vehicular accumulator cell and on-vehicle player respectively.
2. Vehicular accumulator cell undervoltage detection circuit according to claim 1, it is characterized in that：The power sense circuit（4）
By light emitting diode（LED1）, first resistor（R1）, second resistance（R2）, 3rd resistor（R3）, the 4th resistance（R4）, the one or three
Pole pipe（Q1）, the second triode（Q2）And commutation diode（D1）Composition；One end of the light emitting diode and Vehicular accumulator cell
Connection, the other end is connected with one end of first resistor；The other end of the first resistor is connected with the colelctor electrode of the first triode；
The grounded emitter of first triode, its base stage is connected with one end of second resistance；The other end of the second resistance point
Not Lian Jie 3rd resistor and the second triode colelctor electrode；The other end of the 3rd resistor is connected with Vehicular accumulator cell；It is described
The grounded emitter of the second triode, its base stage is connected with one end of the 4th resistance；The other end of the 4th resistance and rectification
The positive pole connection of diode；The negative pole of the commutation diode is connected with Vehicular accumulator cell.
3. Vehicular accumulator cell undervoltage detection circuit according to claim 1, it is characterized in that：The light emitting diode（LED1）
It is red light emitting diodes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621380988.XU CN206272289U (en) | 2016-12-16 | 2016-12-16 | A kind of Vehicular accumulator cell undervoltage detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621380988.XU CN206272289U (en) | 2016-12-16 | 2016-12-16 | A kind of Vehicular accumulator cell undervoltage detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206272289U true CN206272289U (en) | 2017-06-20 |
Family
ID=59046687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621380988.XU Active CN206272289U (en) | 2016-12-16 | 2016-12-16 | A kind of Vehicular accumulator cell undervoltage detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206272289U (en) |
-
2016
- 2016-12-16 CN CN201621380988.XU patent/CN206272289U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: 214072 B1 Block B22-A of Wuxi National High-tech Industrial Development Zone, Jiangsu Province Patentee after: Wuxi Electronics & Instruments Industry Co., Ltd. Address before: 214072 4th Floor, A5 Building, Liyuan Development Zone, Wuxi City, Jiangsu Province Patentee before: Wuxi Electronics & Instruments Industry Co., Ltd. |