CN111381175A - Battery power monitoring circuit of electric bicycle - Google Patents
Battery power monitoring circuit of electric bicycle Download PDFInfo
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- CN111381175A CN111381175A CN201811624697.4A CN201811624697A CN111381175A CN 111381175 A CN111381175 A CN 111381175A CN 201811624697 A CN201811624697 A CN 201811624697A CN 111381175 A CN111381175 A CN 111381175A
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 238000005070 sampling Methods 0.000 claims abstract description 8
- 239000003990 capacitor Substances 0.000 claims description 21
- 230000005669 field effect Effects 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
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Abstract
The invention discloses a battery power monitoring circuit of an electric bicycle, which belongs to the technical field of electric vehicles, comprises a sampling circuit, a filter circuit and a discrimination circuit, and solves the technical problem of monitoring the battery power of the electric vehicle by adopting a modular circuit design.
Description
Technical Field
The invention belongs to the technical field of electric vehicles, and particularly relates to a battery power monitoring circuit of an electric bicycle.
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.
Disclosure of Invention
The invention aims to provide a battery power monitoring circuit for an electric bicycle, which solves the technical problem of monitoring the battery power of the electric bicycle by adopting a modular circuit design.
In order to achieve the purpose, the invention 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.
The invention relates to a battery power monitoring circuit of an electric bicycle, which solves the technical problem of monitoring the battery power of the electric bicycle by adopting a modular circuit design.
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.
According to the invention, the battery power can be displayed by only selecting proper resistance values of the resistor R6, the resistor R10, the resistor R11, the resistor R12 and the resistor R13, so that the battery power display device is suitable for the requirements of modularized 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.
The invention relates to a battery power monitoring circuit of an electric bicycle, which solves the technical problem of monitoring the battery power of the electric bicycle by adopting a modular circuit design.
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 |
|---|---|---|---|
| CN201811624697.4A CN111381175A (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 |
|---|---|---|---|
| CN201811624697.4A CN111381175A (en) | 2018-12-28 | 2018-12-28 | Battery power monitoring circuit of electric bicycle |
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| Publication Number | Publication Date |
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| CN111381175A true CN111381175A (en) | 2020-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811624697.4A Pending CN111381175A (en) | 2018-12-28 | 2018-12-28 | Battery power monitoring circuit of electric bicycle |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203101473U (en) * | 2013-01-06 | 2013-07-31 | 浙江中碳科技有限公司 | Integrated electric quantity detection circuit for three-phase alternating currents |
| WO2016041121A1 (en) * | 2014-09-15 | 2016-03-24 | 深圳市聚作照明股份有限公司 | Led drive power supply |
| CN206533164U (en) * | 2017-03-01 | 2017-09-29 | 重庆四联光电科技有限公司 | Charging and discharging lithium battery battery capacity indication circuit |
| CN207133938U (en) * | 2017-04-19 | 2018-03-23 | 许昌许继低压电器有限公司 | A kind of Combined electric appliance fire disaster monitoring probe |
| CN209746101U (en) * | 2018-12-28 | 2019-12-06 | 南京懂玫驱动技术有限公司 | Battery power monitoring circuit of electric bicycle |
-
2018
- 2018-12-28 CN CN201811624697.4A patent/CN111381175A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203101473U (en) * | 2013-01-06 | 2013-07-31 | 浙江中碳科技有限公司 | Integrated electric quantity detection circuit for three-phase alternating currents |
| WO2016041121A1 (en) * | 2014-09-15 | 2016-03-24 | 深圳市聚作照明股份有限公司 | Led drive power supply |
| CN206533164U (en) * | 2017-03-01 | 2017-09-29 | 重庆四联光电科技有限公司 | Charging and discharging lithium battery battery capacity indication circuit |
| CN207133938U (en) * | 2017-04-19 | 2018-03-23 | 许昌许继低压电器有限公司 | A kind of Combined electric appliance fire disaster monitoring probe |
| CN209746101U (en) * | 2018-12-28 | 2019-12-06 | 南京懂玫驱动技术有限公司 | Battery power monitoring circuit of electric bicycle |
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