CN209746101U - Battery power monitoring circuit of electric bicycle - Google Patents
Battery power monitoring circuit of electric bicycle Download PDFInfo
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- CN209746101U CN209746101U CN201822234159.6U CN201822234159U CN209746101U CN 209746101 U CN209746101 U CN 209746101U CN 201822234159 U CN201822234159 U CN 201822234159U CN 209746101 U CN209746101 U CN 209746101U
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Abstract
the utility model discloses an electric bicycle battery power monitoring circuit, which belongs to the electric vehicle technical field and comprises a sampling circuit, a filter circuit and a discrimination circuit, and solves the technical problem of monitoring the electric vehicle battery power by adopting the modularized circuit design, the utility model adopts 5 voltage threshold values of U1, U2, U3, U4 and U5 to monitor the battery power, along with the reduction of the battery voltage, the threshold voltage sequence of a phase inverter is smaller than U1, U2, U3 and U4, thereby leading the LED lamp D2, the LED lamp D3, the LED lamp D4 and the LED lamp D5 to be sequentially turned off, and visually observing the residual power of the battery, the utility model adopts a logic circuit to directly measure the electric vehicle battery power, adopts an indicator lamp to display the power, and visually observe the residual power value of the battery, the utility model adopts a circuit to realize the monitoring of the battery power without a singlechip and an AD chip, the device can be used for detecting various electric vehicle batteries in a universal way, and is low in cost and convenient to wire.
Description
Technical Field
The utility model belongs to the technical field of the electric motor car, especially, relate to an electric bicycle battery power monitoring circuit.
Background
the electric vehicle battery is the core energy supply of the electric vehicle, the monitoring of the electric vehicle battery is an important link in an electric vehicle control system, the traditional electric vehicle monitoring circuit adopts a mode of matching sampling resistance and AD to realize the monitoring of the electric vehicle, but because AD needs microcontrollers such as a single chip microcomputer to read conversion values of the microcontrollers, the monitoring circuit of the electric vehicle can be used only after the programming of manufacturers, the models of the single chip microcomputers adopted by the manufacturers are different, programs in the electric vehicle single chip microcomputers produced by the manufacturers are different, even AD conversion programs adopted by the electric vehicles of different models of one manufacturer are different, and the modularized production cannot be formed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an electric bicycle battery power monitoring circuit has solved the technical problem who adopts the modularization circuit design control electric motor car battery power.
in order to achieve the above purpose, the utility model adopts the following technical scheme:
A battery electric quantity monitoring circuit of an electric bicycle comprises a sampling circuit, a filter circuit and a discrimination circuit;
The sampling circuit comprises a resistor R1 and a resistor R2, one end of the resistor R1 is connected with the anode of the battery of the electric vehicle, and the other end of the resistor R2 is connected with the ground wire;
The filter circuit comprises an operational amplifier IC1, a resistor R5, a resistor R3, a resistor R4, a capacitor C1, an operational amplifier IC2, a capacitor C2 and a resistor R9, wherein a connection node of the resistor R2 and the resistor R1 is connected with a positive input end of the operational amplifier IC1, a negative input end of the operational amplifier IC1 is connected with one end of the capacitor C1 through the resistor R1, the other end of the capacitor C1 is connected with a positive input end of the operational amplifier IC1, the positive input end of the operational amplifier IC1 is also connected with a ground line through the resistor R1, a connection node of the resistor R1 and the capacitor C1 is also connected with the ground line through the capacitor C1, a negative input end of the operational amplifier IC1 is connected with an output end of the operational amplifier IC1, an output end of the operational amplifier IC1 is also connected with a connection node of the resistor R1 and the capacitor C1 through the resistor R1, and an output end of the;
The discriminating circuit comprises an inverter U1A, an inverter U1B, an inverter U1C, an inverter U1D, an inverter U1E, a resistor R6, a resistor R10, a resistor R11, a resistor R12, a resistor R13, an LED lamp D2, an LED lamp D3, an LED lamp D4, an LED lamp D5, a resistor R7, a resistor R8, a resistor R16, a resistor R17, a resistor R15, a resistor R14 and a field-effect transistor Q1, wherein the output end of the operational amplifier IC1 is connected with the positive electrode of the diode D1, the negative electrode of the diode D1 is connected with the input end of the inverter U1 1, the input end of the inverter U1 1 is connected with the input end of the inverter U1 1 through the resistor R1, and the input end of the inverter U1 1 is connected with the ground wire of the input end of the inverter U1 1 through the resistor R1;
The output end of the inverter U1A is connected with the anode of the LED lamp D2, the cathode of the LED lamp D2 is connected with the ground wire through a resistor R7, the output end of the inverter U1B is connected with the anode of the LED lamp D3, the cathode of the LED lamp D3 is connected with the ground wire through a resistor R8, the output end of the inverter U1C is connected with the anode of the LED lamp D4, the cathode of the LED lamp D4 is connected with the ground wire through a resistor R16, the output end of the inverter U1D is connected with the anode of the LED lamp D5, the cathode of the LED lamp D5 is connected with the ground wire through a resistor R17, the output end of the inverter U1E is connected with the G pole of the field effect tube Q1 through a resistor R15, and the D pole of the field effect tube Q1 is connected with the anode of the electric vehicle battery.
Preferably, the models of the operational amplifier IC1 and the operational amplifier IC2 are both operational amplifiers LM 741; the model numbers of the inverter U1A, the inverter U1B, the inverter U1C, the inverter U1D and the inverter U1E are all 74LS 04.
Preferably, the model of the inverter U1A, the inverter U1B, the inverter U1C, the inverter U1D and the inverter U1E is an inverter in the same chip 74LS 04.
A battery power monitoring circuit of electric bicycle, solved the technical problem who adopts modularization circuit design control electric motor car battery power, the utility model discloses a logic circuit direct measurement electric motor car battery power to adopt the pilot lamp to show the electric quantity, can audio-visual residual electric quantity value of observing the battery, the utility model discloses a circuit realizes the control of battery power, does not need singlechip and AD chip, can general and various electric motor car battery's detection, and is with low costs, the wiring is convenient.
drawings
Fig. 1 is a circuit diagram of the present invention.
Detailed Description
The battery power monitoring circuit of the electric bicycle shown in fig. 1 comprises a sampling circuit, a filter circuit and a discrimination circuit;
The sampling circuit comprises a resistor R1 and a resistor R2, one end of the resistor R1 is connected with the anode of the battery of the electric vehicle, and the other end of the resistor R2 is connected with the ground wire;
The filter circuit comprises an operational amplifier IC1, a resistor R5, a resistor R3, a resistor R4, a capacitor C1, an operational amplifier IC2, a capacitor C2 and a resistor R9, wherein a connection node of the resistor R2 and the resistor R1 is connected with a positive input end of the operational amplifier IC1, a negative input end of the operational amplifier IC1 is connected with one end of the capacitor C1 through the resistor R1, the other end of the capacitor C1 is connected with a positive input end of the operational amplifier IC1, the positive input end of the operational amplifier IC1 is also connected with a ground line through the resistor R1, a connection node of the resistor R1 and the capacitor C1 is also connected with the ground line through the capacitor C1, a negative input end of the operational amplifier IC1 is connected with an output end of the operational amplifier IC1, an output end of the operational amplifier IC1 is also connected with a connection node of the resistor R1 and the capacitor C1 through the resistor R1, and an output end of the;
the voltage of the electric vehicle battery is divided by a resistor R1 and a resistor R2 and then input to the positive input end of the operational amplifier IC1, and the negative electrode of the electric vehicle battery is the ground wire;
The operational amplifier IC1 and the operational amplifier IC2 form a high Q value notch filter, so that low-frequency interference generated by a motor of the electric vehicle can be well filtered, the low-frequency interference cannot be caused when the discrimination circuit discriminates the voltage of the battery, and the stability of the discrimination circuit is ensured.
The discriminating circuit comprises an inverter U1A, an inverter U1B, an inverter U1C, an inverter U1D, an inverter U1E, a resistor R6, a resistor R10, a resistor R11, a resistor R12, a resistor R13, an LED lamp D2, an LED lamp D3, an LED lamp D4, an LED lamp D5, a resistor R7, a resistor R8, a resistor R16, a resistor R17, a resistor R15, a resistor R14 and a field-effect transistor Q1, wherein the output end of the operational amplifier IC1 is connected with the positive electrode of the diode D1, the negative electrode of the diode D1 is connected with the input end of the inverter U1 1, the input end of the inverter U1 1 is connected with the input end of the inverter U1 1 through the resistor R1, and the input end of the inverter U1 1 is connected with the ground wire of the input end of the inverter U1 1 through the resistor R1;
the output end of the inverter U1A is connected with the anode of the LED lamp D2, the cathode of the LED lamp D2 is connected with the ground wire through a resistor R7, the output end of the inverter U1B is connected with the anode of the LED lamp D3, the cathode of the LED lamp D3 is connected with the ground wire through a resistor R8, the output end of the inverter U1C is connected with the anode of the LED lamp D4, the cathode of the LED lamp D4 is connected with the ground wire through a resistor R16, the output end of the inverter U1D is connected with the anode of the LED lamp D5, the cathode of the LED lamp D5 is connected with the ground wire through a resistor R17, the output end of the inverter U1E is connected with the G pole of the field effect tube Q1 through a resistor R15, and the D pole of the field effect tube Q1 is connected with the anode of the electric vehicle battery.
the level discrimination circuit formed by the inverter U1A, the inverter U1B, the inverter U1C, the inverter U1D and the inverter U1E has 5 voltage thresholds, and the 5 voltage thresholds can be changed by adjusting the resistance values of the resistor R6, the resistor R10, the resistor R11, the resistor R12 and the resistor R13; the upper and lower voltage limits of the battery of the electric vehicle adopted in the embodiment are 14.6V to 11V, and since the threshold level of the inverter is 0.45V, the 5 voltage thresholds adopted in the embodiment are respectively:
U1＝0.45V×14.6＝6.6V；
U2＝0.45V×13.6＝6.12V；
U3＝0.45V×12.2≈5.5V；
U4＝0.45V×11.5≈5.2V；
U5＝0.45V×11＝4.95V；
wherein U1, U2, U3, U4 and U5 are the input terminal voltage of inverter U1E, the input terminal voltage of inverter U1D, the input terminal voltage of inverter U1C, the input terminal voltage of inverter U1B and the input terminal voltage of inverter U1A, respectively;
the diode D1 is a constant current diode 1N5283, the constant current of which is I220 uA, and the resistance values of the resistor R6, the resistor R10, the resistor R11, the resistor R12 and the resistor R13 can be calculated by ohm's law.
The inverter U1A, the inverter U1B, the inverter U1C, the inverter U1D and the inverter U1E are all powered by an electric vehicle battery.
in the embodiment, 5 voltage thresholds of U1, U2, U3, U4 and U5 are adopted to monitor the electric quantity of the battery, when the voltage value of the battery is reduced, and the threshold voltage of the inverter U1A is smaller than 6.6V, the inverter U1 outputs a low level, and the LED lamp D2 is turned off, similarly, as the voltage of the battery is reduced, the threshold voltage sequence of the inverter is smaller than that of U1, U2, U3 and U4, so that the LED lamp D2, the LED lamp D3, the LED lamp D4 and the LED lamp D5 are turned off in sequence, and the remaining electric quantity of the battery is visually observed, when the threshold voltage of the inverter is smaller than that of U5, the battery voltage is too low, the inverter U1E outputs a low level, so that the field effect transistor Q1 is turned off, the power supply loop of the electric vehicle motor is disconnected, and the battery is protected from being operated under the condition of.
the utility model discloses only need select suitable resistance R6, resistance R10, resistance R11, resistance R12 and resistance R13 can show battery power, be fit for the demand of modularization production.
Preferably, the models of the operational amplifier IC1 and the operational amplifier IC2 are both operational amplifiers LM 741; the model numbers of the inverter U1A, the inverter U1B, the inverter U1C, the inverter U1D and the inverter U1E are all 74LS 04.
preferably, the model of the inverter U1A, the inverter U1B, the inverter U1C, the inverter U1D and the inverter U1E is an inverter in the same chip 74LS 04.
a battery power monitoring circuit of electric bicycle, solved the technical problem who adopts modularization circuit design control electric motor car battery power, the utility model discloses a logic circuit direct measurement electric motor car battery power to adopt the pilot lamp to show the electric quantity, can audio-visual residual electric quantity value of observing the battery, the utility model discloses a circuit realizes the control of battery power, does not need singlechip and AD chip, can general and various electric motor car battery's detection, and is with low costs, the wiring is convenient.
Claims (3)
1. The utility model provides an electric bicycle battery electric quantity monitoring circuit which characterized in that: the device comprises a sampling circuit, a filter circuit and a discrimination circuit;
The sampling circuit comprises a resistor R1 and a resistor R2, one end of the resistor R1 is connected with the anode of the battery of the electric vehicle, and the other end of the resistor R2 is connected with the ground wire;
The filter circuit comprises an operational amplifier IC1, a resistor R5, a resistor R3, a resistor R4, a capacitor C1, an operational amplifier IC2, a capacitor C2 and a resistor R9, wherein a connection node of the resistor R2 and the resistor R1 is connected with a positive input end of the operational amplifier IC1, a negative input end of the operational amplifier IC1 is connected with one end of the capacitor C1 through the resistor R1, the other end of the capacitor C1 is connected with a positive input end of the operational amplifier IC1, the positive input end of the operational amplifier IC1 is also connected with a ground line through the resistor R1, a connection node of the resistor R1 and the capacitor C1 is also connected with the ground line through the capacitor C1, a negative input end of the operational amplifier IC1 is connected with an output end of the operational amplifier IC1, an output end of the operational amplifier IC1 is also connected with a connection node of the resistor R1 and the capacitor C1 through the resistor R1, and an output end of the;
the discriminating circuit comprises an inverter U1A, an inverter U1B, an inverter U1C, an inverter U1D, an inverter U1E, a resistor R6, a resistor R10, a resistor R11, a resistor R12, a resistor R13, an LED lamp D2, an LED lamp D3, an LED lamp D4, an LED lamp D5, a resistor R7, a resistor R8, a resistor R16, a resistor R17, a resistor R15, a resistor R14 and a field-effect transistor Q1, wherein the output end of the operational amplifier IC1 is connected with the positive electrode of the diode D1, the negative electrode of the diode D1 is connected with the input end of the inverter U1 1, the input end of the inverter U1 1 is connected with the input end of the inverter U1 1 through the resistor R1, and the input end of the inverter U1 1 is connected with the ground wire of the input end of the inverter U1 1 through the resistor R1;
The output end of the inverter U1A is connected with the anode of the LED lamp D2, the cathode of the LED lamp D2 is connected with the ground wire through a resistor R7, the output end of the inverter U1B is connected with the anode of the LED lamp D3, the cathode of the LED lamp D3 is connected with the ground wire through a resistor R8, the output end of the inverter U1C is connected with the anode of the LED lamp D4, the cathode of the LED lamp D4 is connected with the ground wire through a resistor R16, the output end of the inverter U1D is connected with the anode of the LED lamp D5, the cathode of the LED lamp D5 is connected with the ground wire through a resistor R17, the output end of the inverter U1E is connected with the G pole of the field effect tube Q1 through a resistor R15, and the D pole of the field effect tube Q1 is connected with the anode of the electric vehicle battery.
2. The electric bicycle battery power monitoring circuit of claim 1, wherein: the models of the operational amplifier IC1 and the operational amplifier IC2 are both operational amplifiers LM 741; the model numbers of the inverter U1A, the inverter U1B, the inverter U1C, the inverter U1D and the inverter U1E are all 74LS 04.
3. The electric bicycle battery power monitoring circuit of claim 2, wherein: the model of the inverter U1A, the inverter U1B, the inverter U1C, the inverter U1D and the inverter U1E is an inverter in the same 74LS04 chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822234159.6U CN209746101U (en) | 2018-12-28 | 2018-12-28 | Battery power monitoring circuit of electric bicycle |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822234159.6U CN209746101U (en) | 2018-12-28 | 2018-12-28 | Battery power monitoring circuit of electric bicycle |
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| CN209746101U true CN209746101U (en) | 2019-12-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111449491A (en) * | 2019-12-30 | 2020-07-28 | 浙江绍兴苏泊尔生活电器有限公司 | Cooking appliance control method and cooking appliance |
| CN112186832A (en) * | 2020-09-07 | 2021-01-05 | 安徽绿沃循环能源科技有限公司 | Lithium battery charging and discharging indicating circuit |
| CN113933716A (en) * | 2021-09-29 | 2022-01-14 | 深圳市昂佳科技有限公司 | Ultra-low standby power consumption nanoamp wide voltage range LED battery power indicating system |
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2018
- 2018-12-28 CN CN201822234159.6U patent/CN209746101U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111449491A (en) * | 2019-12-30 | 2020-07-28 | 浙江绍兴苏泊尔生活电器有限公司 | Cooking appliance control method and cooking appliance |
| CN112186832A (en) * | 2020-09-07 | 2021-01-05 | 安徽绿沃循环能源科技有限公司 | Lithium battery charging and discharging indicating circuit |
| CN113933716A (en) * | 2021-09-29 | 2022-01-14 | 深圳市昂佳科技有限公司 | Ultra-low standby power consumption nanoamp wide voltage range LED battery power indicating system |
| CN113933716B (en) * | 2021-09-29 | 2022-09-20 | 深圳市昂佳科技有限公司 | Ultra-low standby power consumption nanoamp wide voltage range LED battery power indicating system |
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