CN208682660U - A kind of acquisition equalizing circuit of recognizable equilibrium state - Google Patents
A kind of acquisition equalizing circuit of recognizable equilibrium state Download PDFInfo
- Publication number
- CN208682660U CN208682660U CN201820890248.3U CN201820890248U CN208682660U CN 208682660 U CN208682660 U CN 208682660U CN 201820890248 U CN201820890248 U CN 201820890248U CN 208682660 U CN208682660 U CN 208682660U
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- Prior art keywords
- circuit
- acquisition
- balanced
- inductance
- voltage
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
Abstract
The utility model belongs to electric vehicle engineering field, and in particular to a kind of acquisition equalizing circuit of recognizable equilibrium state.This can recognize the acquisition equalizing circuit of equilibrium state, including monomer voltage Acquisition Circuit, balanced circuit, balancing control circuit and filter circuit；The monomer voltage Acquisition Circuit includes monomer battery voltage input terminal Bn+1 and Bn, filter circuit and port protection circuit.The beneficial effect is that: by opened between comparison AFE chip acquisition channel Cn+1 and Cn in equalizer switch Q1 and voltage value when not opening judge, it is counter push away corresponding state balanced at this time, connecting inner software can effectively identify it is balanced whether normally-open or balanced malfunction；I.e. balanced failure, balanced MOS unnormal unlocking does not increase any other peripheral components in original Acquisition Circuit, economical and practical, securely and reliably.
Description
Technical field
The utility model belongs to electric vehicle engineering field, and in particular to a kind of balanced electricity of the acquisition of recognizable equilibrium state
Road.
Background technique
Battery is widely used in fields such as new-energy automobile, energy storage, with the development of technology, to the service life of battery and
The requirement of safety is continuously improved, and the technical requirements and function to battery management system are also constantly promoted, and battery management system can
Effectively to acquire the monomer voltage of battery, and battery is carried out according to the characteristic that battery is used in combination in collected data information
Effectively management, such as charge and discharge, battery balanced management.
Battery balanced control can effectively improve the service life of battery, but the safety of its control circuit is also extremely heavy
It wants, therefore can recognize that the equilibrium state of current circuit is very necessary.
Utility model content
In order to make up for the defects of the prior art, the utility model provides a kind of acquisition for monomer battery voltage and sentence
The state of other channel-equalization, prevent from reducing battery life caused by balanced malfunction or damage that the dangerous situation of battery occurs can
Identify the acquisition equalizing circuit of equilibrium state.
The utility model is achieved by the following technical solution:
A kind of acquisition equalizing circuit of recognizable equilibrium state, including monomer voltage Acquisition Circuit, balanced circuit, balanced control
Circuit and filter circuit processed；The monomer voltage Acquisition Circuit includes monomer battery voltage input terminal Bn+1 and Bn, filter circuit
And port protection circuit, balancing control circuit include AFE chip Balance route end Sn, resistance R4, resistance R5 and zener diode
D2, balanced circuit include equalizer switch Q1, equalizing resistance R3, inductance L1 and inductance L2, and single battery is just connected to Bn+1, are born
It is connected to Bn, the acquisition channel Cn+1 and Cn of AFE chip, port protection are then entered through inductance L1, inductance L2 and filter circuit
The zener diode D1 of circuit is connected on AFE chip acquisition channel Cn+1 and Cn, for carrying out overvoltage protection to port.
Further, the filter inductance L1 and filter inductance L2 selects magnetic bead or inductance.
Further, the filter circuit is low-pass filter circuit, is made of R1, R2 and C2, and C2 is that the difference of interchannel is filtered
Wave device, pressure voltage should be higher than that the voltage of single battery.
Further, the equalizer switch Q1 is the switch for having control terminal；There is the switch of control terminal to select transistor, transistor
Using metal-oxide-semiconductor or triode, the electric current of metal-oxide-semiconductor is greater than the euqalizing current in balanced circuit；Equalizing resistance R3 according to euqalizing current come
Choose respective resistance values and power；Inductance L1, inductance L2 load current value are higher than maximum euqalizing current value and stay safe clearance.
Further, the resistance R4 and resistance R5, which is selected, is suitble to resistance value to guarantee that it works in depth saturation state as electronics
Switch；It protects the voltage of voltage regulation value of zener diode D2 to select and is lower than metal-oxide-semiconductor VGS maximum value voltage.
The beneficial effects of the utility model are: by comparing between AFE chip acquisition channel Cn+1 and Cn in equalizer switch
Q1 open and voltage value when not opening judge, it is counter push away corresponding state balanced at this time, connecting inner software can effectively be known
Not it is balanced whether normally-open or balanced malfunction；I.e. balanced failure, balanced MOS unnormal unlocking, in original acquisition electricity
Road does not increase any other peripheral components, economical and practical, securely and reliably.
Detailed description of the invention
The utility model will be further described below with reference to the accompanying drawings.
Attached drawing 1 is the acquisition equalizing circuit block diagram that can recognize equilibrium state；
Attached drawing 2 is the acquisition balanced realization circuit one that can recognize equilibrium state；
Attached drawing 3 is the acquisition balanced realization circuit two that can recognize equilibrium state.
Specific embodiment
Attached drawing 1-3 is a kind of specific embodiment of the utility model.A kind of recognizable equilibrium state of the utility model is adopted
Collect equalizing circuit, including monomer voltage Acquisition Circuit, balanced circuit, balancing control circuit and filter circuit；The monomer voltage
Acquisition Circuit includes monomer battery voltage input terminal Bn+1 and Bn, filter circuit and port protection circuit, balancing control circuit packet
Include AFE chip equalization control terminal Sn, resistance R4, resistance R5 and zener diode D2, balanced circuit includes equalizer switch Q1,
Weighing apparatus resistance R3, inductance L1 and inductance L2, single battery are just connected to Bn+1, and negative terminal is connected to Bn, then through inductance L1, inductance L2
Enter the acquisition channel Cn+1 and Cn of AFE chip with filter circuit, the zener diode D1 of port protection circuit is connected to AFE core
On piece acquisition channel Cn+1 and Cn, for carrying out overvoltage protection to port.
Further, the inductance L1 and inductance L2 selects magnetic bead or inductance.
Further, the filter circuit is low-pass filter circuit, is made of R1, R2 and C2, and C2 is that the difference of interchannel is filtered
Wave device, pressure voltage should be higher than that the voltage of single battery.
Further, the equalizer switch Q1 is the switch for having control terminal；There is the switch of control terminal to select transistor, transistor
Using metal-oxide-semiconductor or triode, the electric current of metal-oxide-semiconductor is greater than the euqalizing current in balanced circuit；Equalizing resistance R3 according to euqalizing current come
Choose respective resistance values and power；Inductance L1, inductance L2 load current value are higher than maximum euqalizing current value and stay safe clearance.
Further, the resistance R4 and resistance R5, which is selected, is suitble to resistance value to guarantee that it works in depth saturation state as electronics
Switch；It protects the voltage of voltage regulation value of zener diode D2 to select and is lower than metal-oxide-semiconductor VGS maximum value voltage.
A kind of acquisition equalizing circuit of recognizable equilibrium state of the utility model, attached drawing 2 is PMOS tube as when using
The circuit implementing scheme of weighing apparatus MOS, attached drawing 3 are circuit implementing scheme of the NMOS tube as equilibrium MOS, and circuit control principle is close
Seemingly；Now by taking attached drawing 2 as an example, single battery is just connected to Bn+1, negative terminal is connected to Bn, then through two filter inductances of L1 and L2,
The low-pass filter circuit formed through R1, R2 and C2 enters the acquisition channel C of AFE chipn+1And Cn.Port protection zener diode
D1 is connected to acquisition channel Cn+1And CnOn, for carrying out overvoltage protection, the balanced control that equalizing circuit passes through AFE chip to port
End S processednThe grid (G) of balanced PMOS is connected to through resistance R4, the source electrode (S) of balanced PMOS is connected to the rear end of L2, and drain electrode (D) is through equal
Weighing apparatus resistance R3 is connected to the rear end of L1, and the pull-up resistor R5 of the grid (G) of balanced PMOS connects between the front end L2 and grid (S),
The GS protection diode D2 of weighing apparatus PMOS equally connects between the front end L2 and grid (S).
Circuit operation principle: when channel carries out monomer voltage acquisition function, Bn+1And BnBetween voltage pass through filtered electrical
Feel L1, L2, enters AFE chip collection terminal using low-pass filter circuit R1, R2 and C2 and port overvoltage protection diode D2
Mouth Cn+1And Cn, obtain the real-time voltage value V of single batteryn+1=VBn+1-VBn。
When channel, which carries out monomer voltage, opens balanced, the Balance route end S of AFE chipnExport low level, Bn+1Place
Voltage signal divides to obtain gate pmos pole tension through R5 and R4PMOS tube source voltage VQ1S=VBn+1-
VL2(VL2For pressure drop on inductance L2, the D.C. resistance recommendation of the inductance is generally the Ω of 0.2 Ω~0.3), euqalizing current is set substantially
It is set to >=100mA, when euqalizing current takes the smallest 100mA, VS=VBn+1-VL2=VBn+1- 0.2 × 0.1=VBn+1-0.02,The resistance value that R5 chooses should make V much larger than R4GSUnlatching higher than PMOS
Threshold voltage can open PMOS tube.When PMOS is opened, Bn+1Locate voltage through inductance L2, PMOS tube Q1, resistance R3 and inductance
L1 is back to BnBalanced circuit is formed, choosing suitable R3 resistance value makes euqalizing current >=100mA, then enters AFE chip at this time and acquire
Port Cn+1And CnVoltage value Vn+1'=VBn+1-VL2-VL1=Vn+1- 0.2 × 0.1-0.2 × 0.1=Vn+1- 0.04 (this formula
Middle inductance D.C. resistance is 0.2 Ω, and euqalizing current is the smallest 100mA).Two are opened with balanced it can be concluded that not opening in equilibrium
Monomer collection voltages difference △ V=V under kind staten+1-Vn+1'=40mV, i.e., the monomer collection voltages difference under two states are at least
40mV。
It maintains to stablize when progress substantially since battery balanced function can be selected in battery voltage, single channel cell voltage is in short-term
The interior floating not having greater than 20mV, and the measurement error of general AFE chip single channel voltage gamut is ± 10mV, △ V
Much larger than AFE chip single channel voltage measurement error, can be effectively recognized.Therefore equilibrium state can be judged in conjunction with software,
Differentiate balanced whether normally-open.If unnormal unlocking, then can determine whether to break down for balanced PMOS.
The utility model is not limited to above embodiment, anyone, which should learn, makes under the enlightenment of the utility model
There is same or similar technical solution with the utility model, each fall within the protection scope of the utility model.
Technology that the utility model is not described in detail, shape, construction portion are well-known technique.
Claims (4)
1. a kind of acquisition equalizing circuit of recognizable equilibrium state, including monomer voltage Acquisition Circuit, balanced circuit, Balance route
Circuit and filter circuit；It is characterized in that, the monomer voltage Acquisition Circuit include monomer battery voltage input terminal Bn+1 and Bn,
Filter circuit and port protection circuit, balancing control circuit include AFE chip Balance route end Sn, resistance R4, resistance R5 and steady
Diode D2 is pressed, balanced circuit includes equalizer switch Q1, equalizing resistance R3, inductance L1 and inductance L2, the positive termination of single battery
To Bn+1, negative terminal is connected to Bn, and the acquisition channel Cn+1 and Cn of AFE chip are then entered through inductance L1, inductance L2 and filter circuit,
The zener diode D1 of port protection circuit is connected on AFE chip acquisition channel Cn+1 and Cn, for carrying out over-voltage guarantor to port
Shield.
2. a kind of acquisition equalizing circuit of recognizable equilibrium state according to claim 1, it is characterised in that: the inductance
L1 and inductance L2 selects magnetic bead or inductance.
3. a kind of acquisition equalizing circuit of recognizable equilibrium state according to claim 1, it is characterised in that: the filtering
Circuit is low-pass filter circuit, is made of R1, R2 and C2, and C2 is the difference filter of interchannel, and pressure voltage should be higher than that single-unit electricity
The voltage in pond.
4. a kind of acquisition equalizing circuit of recognizable equilibrium state according to claim 1, it is characterised in that: the equilibrium
Switch Q1 is the switch for having control terminal；There is the switch of control terminal to select transistor, transistor uses metal-oxide-semiconductor or triode, metal-oxide-semiconductor
Electric current be greater than the euqalizing current in balanced circuit；Equalizing resistance R3 chooses respective resistance values and power according to euqalizing current；Inductance
L1, inductance L2 load current value are higher than maximum euqalizing current value and stay safe clearance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820890248.3U CN208682660U (en) | 2018-06-09 | 2018-06-09 | A kind of acquisition equalizing circuit of recognizable equilibrium state |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820890248.3U CN208682660U (en) | 2018-06-09 | 2018-06-09 | A kind of acquisition equalizing circuit of recognizable equilibrium state |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208682660U true CN208682660U (en) | 2019-04-02 |
Family
ID=65878256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820890248.3U Expired - Fee Related CN208682660U (en) | 2018-06-09 | 2018-06-09 | A kind of acquisition equalizing circuit of recognizable equilibrium state |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208682660U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116559634A (en) * | 2023-07-11 | 2023-08-08 | 杭州华塑科技股份有限公司 | Circuit fault detection method and device, storage medium and electronic equipment |
-
2018
- 2018-06-09 CN CN201820890248.3U patent/CN208682660U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116559634A (en) * | 2023-07-11 | 2023-08-08 | 杭州华塑科技股份有限公司 | Circuit fault detection method and device, storage medium and electronic equipment |
| CN116559634B (en) * | 2023-07-11 | 2023-09-12 | 杭州华塑科技股份有限公司 | Circuit fault detection method and device, storage medium and electronic equipment |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190402 Termination date: 20200609 |