CN109245206A - A kind of high-voltage lithium ion battery group charging control signal generation circuit - Google Patents
A kind of high-voltage lithium ion battery group charging control signal generation circuit Download PDFInfo
- Publication number
- CN109245206A CN109245206A CN201811084357.7A CN201811084357A CN109245206A CN 109245206 A CN109245206 A CN 109245206A CN 201811084357 A CN201811084357 A CN 201811084357A CN 109245206 A CN109245206 A CN 109245206A
- Authority
- CN
- China
- Prior art keywords
- circuit
- voltage
- input terminal
- control signal
- charging control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The present invention relates to a kind of high-voltage lithium ion battery group charging control signal generation circuits to belong to aerospace craft power-supply system charge control technical field for the low orbit spacecraft charge control of high-voltage lithium ion battery group.It include: bleeder circuit, the first input filter circuit, the second input filter circuit, instrument operational amplification circuit, the first current-limiting circuit, the second current-limiting circuit, positive-feedback circuit, voltage comparator, pull-up circuit, voltage regulator circuit and reference generating circuit.The present invention in Acquisition Circuit by introducing divider resistance, input filter capacitor and instrument operational amplifier in parallel, positive feedback and input filter capacitor are introduced in comparison circuit simultaneously, efficiently solve the easy oscillation problem of charging control signal generation circuit output signal, so that circuit is adapted to high pressure lithium ion group battery sampling demand, is suitable for the high reliability request of aerospace system.
Description
Denomination of invention
A kind of high-voltage lithium ion battery group charging control signal generation circuit.
Technical field
The invention belongs to aerospace craft power-supply system charge control technical field more particularly to a kind of high pressure lithium-ion electrics
Pond group charging control signal generation circuit.
Background technique
Lithium ion battery has the advantages that specific energy is high, has extended cycle life, self-discharge rate is low etc., is ideal secondary electricity
Source is used as the mainstream power supply of space industry at present.Single-cell lithium-ion battery monomer is unable to satisfy the high electricity of low orbit spacecraft
Pressure, high capacity demand are typically used by the tandem compound of battery cell.For high-voltage lithium ion battery, battery
It overcharges or charge less not only influences the service life of battery, lead to battery premature failure, or even jeopardize spacecraft power supply safety, and it is electric
The opening of pond, which fills and stop filling, to be realized by charging control signal.Therefore, to extend the in-orbit service life cycle of lithium ion battery,
Avoid over-charging of battery or charge less risk, it is necessary to assure the stability and reliability of charging control signal.
The charging control signal generation circuit that tradition is realized by hardware mode, as shown in Figure 1, being carried out to battery voltage
It is compared after acquisition with reference voltage, when battery voltage is greater than (being less than) reference voltage, output phase inductive charging control letter
Number into subsequent conditioning circuit, stopping filling and (opening and fill) for battery pack is realized by rear class drive control circuit.
Due to the presence of internal resistance in battery cell, the internal resistance of battery pack increases as series connection amount of monomer increases.Work as electricity
When pond stops charging, battery voltage can reduce because of the presence of internal resistance, and when battery pack starts to charge, battery voltage can be because
For internal resistance presence and rise.Therefore, although traditional circuit has many advantages, such as that structure is simple, easily realizes, which exists
The drawbacks of being only applicable to the charge control of mesolow battery, easily charging control signal being caused to change and vibrate repeatedly.
Therefore, the charging control signal generation circuit suitable for high-voltage lithium ion battery group is designed, guarantees charge control
The reliability and stability of signal are one of current urgent problems to be solved.
Summary of the invention
The problem to be solved in the present invention is to make charging control signal generation circuit adapt to the sampling of high-voltage lithium ion battery group to need
It asks, improves the reliability and stability of circuit.
For this purpose, it is an object of the invention to propose a kind of high-voltage lithium ion battery group charging control signal generation circuit.Packet
Include the circuit and charging control signal generation circuit suitable for high-voltage lithium ion battery group voltage acquisition.
To achieve the above object, present invention employs following technical solutions:
Voltage collection circuit, the voltage collection circuit include bleeder circuit, the first input filter circuit and instrument operation
Amplifying circuit；
As the input signal source of the charging control signal generation circuit, the input signal source anode passes through two series connection
Resistance be connected with instrument with operational amplification circuit in-phase end；The input signal source negative terminal and instrument operational amplification circuit reverse side
It is connected；The instrument is connected with inverting input terminal by two divider resistances in parallel with operational amplification circuit non-inverting input terminal；It is described
First input filter circuit both ends are connected with the instrument with operational amplification circuit non-inverting input terminal and inverting input terminal respectively；
Comparison circuit, the comparison circuit include the first current-limiting circuit, the second input filter circuit, positive-feedback circuit, electricity
Press comparator and pull-up circuit；
As the input source of the comparison circuit, first current-limiting circuit one end and instrument operational amplification circuit output end
It is connected；The first current-limiting circuit other end is connected with voltage comparator non-inverting input terminal；Second input filter circuit is logical
Two concatenated capacitors are crossed to be connected respectively at the voltage comparator circuit non-inverting input terminal with inverting input terminal；The voltage is more electric
Road non-inverting input terminal, which is connected by the positive-feedback circuit with the voltage comparator circuit output end, constitutes positive feedback；The voltage
Comparison circuit output end is connected with the pull-up circuit；
Voltage reference circuit, the voltage reference circuit include the second current-limiting circuit, voltage regulator circuit and reference generating circuit；
The voltage regulator circuit includes zener diode and third current-limiting circuit and power supply+12V；The reference generating circuit includes that partial pressure is adjusted
Try resistance and divider resistance；
Second current-limiting circuit one end is connected with the voltage comparator inverting input terminal；Second current-limiting circuit is another
One end is connected with the divider resistance；The divider resistance other end is connected with power ground；The zener diode anode and electricity
Source it is connected；The zener diode cathode is connected by the third current-limiting circuit with the power supply+12V；The partial pressure is adjusted
Examination resistance is connected with the divider resistance；The partial pressure debugging resistance is connected with the zener diode cathode；
Technical solution of the present invention is suitable for high-voltage lithium ion battery group voltage acquisition, and charging control signal production can be improved
The reliability and stability of raw circuit.
Detailed description of the invention
Attached drawing 1 is charging control signal generation circuit figure in traditional technology；
Attached drawing 2 is high-voltage lithium ion battery group charging control signal generation circuit figure provided in an embodiment of the present invention.
In Fig. 1: battery voltage+inputted just for battery voltage；Battery voltage-is that battery voltage input is negative；R1,
R2 and R5 is divider resistance；R3, R4 and R6 are current-limiting resistance；* R5 and * R6 is partial pressure debugging resistance in voltage regulator circuit；VrefFor base
Quasi- reference voltage；D1 is zener diode；N2 is voltage comparator；R7 is pull-up resistor；UOFor the charging control signal of output；
In Fig. 2: battery voltage+inputted just for battery voltage；Battery voltage-is that battery voltage input is negative；*R1
It is partial pressure debugging resistance in Acquisition Circuit with * R2；C1~C4 is capacitor；R1, R2 and R5 are divider resistance；N1 is that instrument is put with operation
Big device AD620；R3, R4 and R6 are current-limiting resistance；* R5 and * R6 is partial pressure debugging resistance；VrefFor benchmark reference voltage；D1 is steady
Press diode 1N829；N2 is voltage comparator；R7 is pull-up resistor；* R3 and * R4 is that resistance is debugged in positive feedback；UOFor output
Charging control signal.
Specific embodiment
The present invention is to solve being not suitable for high-tension battery, signal stabilization for traditional charging control signal generation circuit
Difference problem low with reliability, technical solution of the present invention proposes a kind of high-voltage lithium ion battery group charging control in view of the above problems
Signal generating circuit processed.Technical solution of the present invention introduces two concatenated partial pressures debugging resistance and high-precision in high-voltage acquisition circuit
Instrument operational amplifier is spent, by introducing two divider resistances and two series filtering capacitors in parallel in instrument opamp input terminal
Mode realizes the high precision collecting of high-tension battery group voltage；Positive feedback is introduced in voltage comparator circuit, while being compared in voltage
Circuit input end introduces two series filtering capacitors, improves the anti-interference ability of circuit, can effectively solve charging control signal and stablizes
Poor, the easy oscillation problem of property.
2 pairs of technical solution of the present inventions are described in detail with reference to the accompanying drawing:
Voltage collection circuit, the voltage collection circuit include bleeder circuit (the resistance * R1 of debugging containing partial pressure, * R2 and partial pressure
Resistance R1, R2), the first input filter circuit (C1 containing capacitor, C2) and instrument operational amplification circuit N1；
As the input signal source of the charging control signal generation circuit, the battery voltage anode and the partial pressure
Circuit (* R1 connects with * R2) one end is connected；The battery voltage negative terminal and instrument operational amplification circuit N1 reverse side phase
Even；Bleeder circuit (* R1 connects with the * R2) other end is connected with the instrument with operational amplification circuit N1 in-phase end；Described
Capacitor C1 connects with capacitor C2 in one input filter circuit；The capacitor C1 and instrument operational amplification circuit N1 in-phase end phase
Even；The capacitor C2 is connected with the instrument with operational amplification circuit N1 reverse side；Resistance R1 and resistance R2 in the bleeder circuit
It is connected with operational amplification circuit N1 in-phase end with reverse side after parallel connection respectively at the instrument；The voltage collection circuit passes through adjusting
The partial pressure debugging resistance * R1 and * R2 resistance value realize the high precision collecting of high-voltage lithium ion battery group voltage in a manner of dividing；
Comparison circuit, the comparison circuit include the first current-limiting circuit R3, the second input filter circuit (C3 containing capacitor,
C4), positive-feedback circuit (* containing resistance R3, * R4), voltage comparator N2 and pull-up circuit (R7 containing pull-up resistor and pull-up power supply+
5V)；
As the input source of the comparison circuit, instrument operational amplification circuit output end and first current-limiting circuit
The one end R3 is connected；The first current-limiting circuit R3 other end is connected with the voltage comparator N2 non-inverting input terminal；Described second
Capacitor C3 connects with capacitor C4 in input filter circuit；The capacitor C3 is connected with the voltage comparator N2 inverting input terminal；
The capacitor C4 is connected with the voltage comparator N2 non-inverting input terminal；Resistance * R3 and resistance * R4 goes here and there in the positive-feedback circuit
Connection；The resistance * R3 is connected with the voltage comparator N2 non-inverting input terminal；The resistance * R4 and voltage comparator N2
Output end is connected；The voltage comparator N2 output end is connected by pull-up resistor R7 with pull-up power supply+5V；The comparison circuit
The battery voltage analog signal of input is converted to the digital signal of 0V and 5V；
Voltage reference circuit, the voltage reference circuit include the second current-limiting circuit R4, voltage regulator circuit (containing zener diode
D1, third current-limiting resistance R6 and power supply+12V) and reference generating circuit (the resistance * R5 of debugging containing partial pressure, * R6 and divider resistance
R5)；
Described one end second current-limiting circuit R4 is connected with the voltage comparator N2 inverting input terminal；The second current limliting electricity
The road R4 other end is connected with the divider resistance R5；The divider resistance R5 other end is connected with power ground；Two pole of pressure stabilizing
Pipe D1 anode is connected with power ground；The zener diode D1 cathode passes through the third current-limiting resistance R6 and the power supply+12V
It is connected；The partial pressure debugging resistance * R5 connects with partial pressure debugging resistance * R6；The partial pressure debugs resistance * R5 and described point
Piezoresistance R5 is connected；The partial pressure debugging resistance * R6 is connected with the zener diode D1 cathode；The voltage reference circuit is logical
The resistance value for overregulating the partial pressure debugging resistance * R5 and * R6 generates reference voltage Vref；
As stated above, the high-voltage lithium ion battery charging control signal generation circuit that technical solution of the present invention provides
In, battery voltage is divided by the low-voltage signal for 0V~5V by electric resistance partial pressure mode, then difference is given instrument and put with operation
Big device is exported with 1:1 ratio to comparison circuit；Debugging resistance * R5, * R6 and positive feedback debugging resistance * R3, * are divided by adjusting
The resistance value of R4 obtains comparison circuit high and low thresholds threshold value UT2、UT1, when battery voltage acquisition low pressure output signal is greater than UT2When,
Voltage comparator output voltage is 5V high level by the overturning of 0V low level, when battery voltage acquisition low pressure output signal is less than UT1
When, voltage comparator output voltage is 0V low level by the overturning of 5V high level, when battery voltage acquisition low pressure output signal exists
UT1~UT2When in range, output signal is remained unchanged.
It is evidenced from the above discussion that the high-voltage lithium ion battery charging control signal that technical solution of the present invention provides generates electricity
Road has the advantages that following several respects:
1) two concatenated partial pressures are introduced in high-voltage acquisition circuit and debug resistance, and dividing ratios flexibility is adjustable；
2) instrument opamp input terminal introduces two divider resistances and two series filtering capacitors in parallel, can effectively avoid electricity
High pressure introduces instrument operational amplifier when resistance or capacitive faults, can effectively protect late-class circuit, and the sample circuit is made to adapt to high pressure
Lithium ion battery sample requirement, while the introducing of filter capacitor can effectively absorb input terminal voltage fluctuation, improve battery voltage
Sampling precision；
3) voltage comparator input terminal introduces two concatenated filter capacitors, can effectively offset the influence of parasitic stray capacitance,
Improve the anti-interference ability of circuit；
4) positive feedback is introduced in comparison circuit and form hysteresis voltage comparator, effectively charging control signal can be avoided to become repeatedly
Change and vibrate, is suitable for the high reliability request of aerospace system；
Although the invention has been described by way of example and in terms of the preferred embodiments, but it is not for limiting the present invention, any this field
Technical staff without departing from the spirit and scope of the present invention, may be by the methods and technical content of the disclosure above to this hair
Bright technical solution makes possible variation and modification, therefore, anything that does not depart from the technical scheme of the invention, and according to the present invention
Technical spirit any simple modifications, equivalents, and modifications to the above embodiments, belong to technical solution of the present invention
Protection scope.
Claims (5)
1. a kind of high-voltage lithium ion battery group charging control signal generation circuit characterized by comprising
Voltage collection circuit, the voltage collection circuit include bleeder circuit, the first input filter circuit and instrument operation amplifier
Circuit；
As the input signal source of the charging control signal generation circuit, the input signal source anode passes through two concatenated electricity
Resistance is connected with instrument with operational amplification circuit in-phase end；The input signal source negative terminal and instrument operational amplification circuit reverse side phase
Even；The instrument is connected with inverting input terminal by two divider resistances in parallel with operational amplification circuit non-inverting input terminal；Described
One input filter circuit both ends are connected with the instrument with operational amplification circuit non-inverting input terminal and inverting input terminal respectively；
Comparison circuit, the comparison circuit include the first current-limiting circuit, the second input filter circuit, positive-feedback circuit, voltage ratio
Compared with device and pull-up circuit；
As the input source of the comparison circuit, first current-limiting circuit one end and instrument operational amplification circuit output end phase
Even；The first current-limiting circuit other end is connected with voltage comparator non-inverting input terminal；Second input filter circuit passes through
Two concatenated capacitors are connected respectively at the voltage comparator circuit non-inverting input terminal with inverting input terminal；The voltage comparator circuit
Non-inverting input terminal, which is connected by the positive-feedback circuit with the voltage comparator circuit output end, constitutes positive feedback；The voltage ratio
It is connected compared with circuit output end with the pull-up circuit；
Voltage reference circuit, the voltage reference circuit include the second current-limiting circuit, voltage regulator circuit and reference generating circuit；
Second current-limiting circuit one end is connected with the voltage comparator inverting input terminal；The second current-limiting circuit other end
It is connected with the divider resistance；Zener diode cathode is connected with partial pressure debugging resistance in the reference generating circuit.
2. a kind of high-voltage lithium ion battery group charging control signal generation circuit according to claim 1, it is characterised in that:
Divider resistance uses parallel way in the voltage collection circuit.
3. a kind of high-voltage lithium ion battery group charging control signal generation circuit according to claim 1, it is characterised in that:
The voltage collection circuit output uses instrument operational amplifier, and instrument uses series connection side with opamp input terminal capacitor
Formula.
4. a kind of high-voltage lithium ion battery group charging control signal generation circuit according to claim 1, it is characterised in that:
The comparison circuit in-phase end is connected to form hysteresis voltage section by positive feedback resistor and the comparison circuit output end.
5. a kind of high-voltage lithium ion battery group charging control signal generation circuit according to claim 1, it is characterised in that:
The voltage comparator non-inverting input terminal two concatenated capacitors in parallel with the voltage comparator inverting input terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811084357.7A CN109245206B (en) | 2018-09-17 | 2018-09-17 | High-voltage lithium ion battery pack charging control signal generation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811084357.7A CN109245206B (en) | 2018-09-17 | 2018-09-17 | High-voltage lithium ion battery pack charging control signal generation circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109245206A true CN109245206A (en) | 2019-01-18 |
| CN109245206B CN109245206B (en) | 2021-10-15 |
Family
ID=65059544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811084357.7A Active CN109245206B (en) | 2018-09-17 | 2018-09-17 | High-voltage lithium ion battery pack charging control signal generation circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109245206B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110562089A (en) * | 2019-08-02 | 2019-12-13 | 恒大智慧充电科技有限公司 | charging guide device and charging equipment |
| CN113675931A (en) * | 2021-09-16 | 2021-11-19 | 上海市特种设备监督检验技术研究院 | Lithium ion battery charging management circuit |
| CN114047443A (en) * | 2021-10-12 | 2022-02-15 | 博科能源系统(深圳)有限公司 | Analog battery and circuit board thereof, analog battery testing system and testing method thereof |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102053198A (en) * | 2009-10-28 | 2011-05-11 | 凹凸电子（武汉）有限公司 | Voltage detection circuit and method and electronic system |
| CN201829922U (en) * | 2010-10-21 | 2011-05-11 | 三泰电力技术（南京）有限公司 | Alternating current and direct current overvoltage detecting and protecting circuit of relay tester |
| JP5030817B2 (en) * | 2008-02-29 | 2012-09-19 | 東洋電機製造株式会社 | Voltage duty ratio conversion circuit |
| CN103424601A (en) * | 2013-08-21 | 2013-12-04 | 矽力杰半导体技术(杭州)有限公司 | Voltage detecting circuit |
| CN104655959A (en) * | 2015-01-29 | 2015-05-27 | 北京新能源汽车股份有限公司 | Detection apparatus for electric automobile outage back high pressure surplus electricity |
| CN204592987U (en) * | 2015-05-23 | 2015-08-26 | 杭州铭利科技有限公司 | A kind of LED with Humidity Detection |
| CN204631114U (en) * | 2015-05-28 | 2015-09-09 | 海特尔机电工程技术（马鞍山）有限公司 | DC voltage sampling in SVG and overvoltage crowbar |
| CN204832308U (en) * | 2015-05-28 | 2015-12-02 | 海特尔机电工程技术（马鞍山）有限公司 | Grid voltage sampling and zero cross detection circuit among SVG |
| CN205608074U (en) * | 2016-05-23 | 2016-09-28 | 重庆灿源电子有限公司 | Comparison circuit's test fixture |
-
2018
- 2018-09-17 CN CN201811084357.7A patent/CN109245206B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5030817B2 (en) * | 2008-02-29 | 2012-09-19 | 東洋電機製造株式会社 | Voltage duty ratio conversion circuit |
| CN102053198A (en) * | 2009-10-28 | 2011-05-11 | 凹凸电子（武汉）有限公司 | Voltage detection circuit and method and electronic system |
| CN201829922U (en) * | 2010-10-21 | 2011-05-11 | 三泰电力技术（南京）有限公司 | Alternating current and direct current overvoltage detecting and protecting circuit of relay tester |
| CN103424601A (en) * | 2013-08-21 | 2013-12-04 | 矽力杰半导体技术(杭州)有限公司 | Voltage detecting circuit |
| CN104655959A (en) * | 2015-01-29 | 2015-05-27 | 北京新能源汽车股份有限公司 | Detection apparatus for electric automobile outage back high pressure surplus electricity |
| CN204592987U (en) * | 2015-05-23 | 2015-08-26 | 杭州铭利科技有限公司 | A kind of LED with Humidity Detection |
| CN204631114U (en) * | 2015-05-28 | 2015-09-09 | 海特尔机电工程技术（马鞍山）有限公司 | DC voltage sampling in SVG and overvoltage crowbar |
| CN204832308U (en) * | 2015-05-28 | 2015-12-02 | 海特尔机电工程技术（马鞍山）有限公司 | Grid voltage sampling and zero cross detection circuit among SVG |
| CN205608074U (en) * | 2016-05-23 | 2016-09-28 | 重庆灿源电子有限公司 | Comparison circuit's test fixture |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110562089A (en) * | 2019-08-02 | 2019-12-13 | 恒大智慧充电科技有限公司 | charging guide device and charging equipment |
| CN110562089B (en) * | 2019-08-02 | 2021-04-27 | 恒大智慧充电科技有限公司 | Charging guide device and charging equipment |
| CN113675931A (en) * | 2021-09-16 | 2021-11-19 | 上海市特种设备监督检验技术研究院 | Lithium ion battery charging management circuit |
| CN114047443A (en) * | 2021-10-12 | 2022-02-15 | 博科能源系统(深圳)有限公司 | Analog battery and circuit board thereof, analog battery testing system and testing method thereof |
| CN114047443B (en) * | 2021-10-12 | 2024-05-17 | 博科能源系统(深圳)有限公司 | Analog battery, circuit board thereof, analog battery test system and test method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109245206B (en) | 2021-10-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109245206A (en) | A kind of high-voltage lithium ion battery group charging control signal generation circuit | |
| CN105846541A (en) | Power-down protection circuit | |
| CN103604975B (en) | Anti-interference low-voltage detection circuit | |
| CN104101839A (en) | Electric quantity detection system and electric quantity detection method | |
| CN210015156U (en) | Current detection circuit, device and electric product | |
| CN103792446A (en) | Method for simulating discharge performance of battery and battery simulator applying same | |
| CN105675997A (en) | Automobile battery pack dynamic insulation resistance detecting device | |
| CN108761342A (en) | A kind of new energy electric motor vehicle storage battery safety test method | |
| CN105572502A (en) | Charging and discharging integrated detection device of energy storage super capacitor | |
| JP5480434B1 (en) | Capacitor power supply device, voltage monitoring device, voltage monitoring method, and method of manufacturing capacitor power supply device | |
| CN202997539U (en) | A super capacitor voltage balance protection circuit | |
| CN106526357B (en) | A kind of capacitor equilibrium detection system in super capacitor mould group | |
| CN108599306A (en) | A kind of lead acid batteries charger | |
| CN109286229A (en) | A kind of charge protector of battery | |
| CN203590179U (en) | Oscillator circuit | |
| CN213633756U (en) | Detection system for battery electric quantity | |
| CN209627036U (en) | A kind of battery management system | |
| CN209748236U (en) | Discrete power supply charging circuit | |
| CN203455403U (en) | Battery voltage detection circuit based on Zener diode | |
| CN203606426U (en) | Voltage acquisition system of single battery of electric automobile power battery group | |
| CN202383264U (en) | Battery voltage detection circuit and device | |
| CN202798085U (en) | Simplified storage battery charging maximum power point tracking (MPPT) control circuit | |
| CN109387785A (en) | A kind of single-unit System of voltage acquisition of multi-string battery group | |
| CN207123777U (en) | The 1mA current source modules for carrying overcurrent protection based on operational amplifier | |
| CN109980753A (en) | A kind of battery management system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |