CN201373909Y - Device for testing voltage of single battery of battery pack - Google Patents
Device for testing voltage of single battery of battery pack Download PDFInfo
- Publication number
- CN201373909Y CN201373909Y CN200920101538U CN200920101538U CN201373909Y CN 201373909 Y CN201373909 Y CN 201373909Y CN 200920101538 U CN200920101538 U CN 200920101538U CN 200920101538 U CN200920101538 U CN 200920101538U CN 201373909 Y CN201373909 Y CN 201373909Y
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- Prior art keywords
- gating
- switch
- voltage
- striding capacitance
- battery
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- Measurement Of Current Or Voltage (AREA)
Abstract
The utility model relates to a device for testing voltage of a single battery of a battery pack. The device comprises a switch network with a gating battery, a flying capacitor C which separates differential-mode voltage from common-mode voltage, a gating and actuating circuit and a micro-controller with an analogue/digital converter, wherein the gating network is connected with the micro-controller by the flying capacitor C; and the output terminal of the micro-controller is connected with the switch network by the gating and actuating circuit. The utility model provides a voltage testing circuit which consists of the switch network with unidirectional flowing of charges and the flying capacitor C with unfixed polarity, is exacter to measure the voltage of the single battery in the battery pack, has fewer device amount and lower cost, and improves the reliability more.
Description
Technical field
The utility model relates to a kind of voltage check device, specifically a kind of batteries monomer battery voltage pick-up unit.
Background technology
Mostly the electric battery of using in electric vehicle, electric tool, illumination and uninterrupted power source etc. is one group of dc battery jar of connecting.Managerial demand to electric battery has accurate measurement to the voltage that each that is together in series saves cell.Existing pick-up unit is a kind of to be the electric voltage observation circuit that is made of differential operational amplifier, and this electric voltage observation circuit is very high to the requirement of resistors match, and the little by little error of resistance can the serious common-mode rejection ratio that reduces circuit.In order under the so very high common mode voltage of electric battery, to take out the very little differential voltage of cell, need very high resistors match degree, adopt discrete component to be difficult to satisfy simultaneously the requirement of cost and precision.Another kind of pick-up unit is to constitute voltage detecting circuit by operational transconductance amplifier and inspection leakage resistance.For reaching the higher voltage accuracy of detection, often need to use unique operational amplifier and high precision low temperature to float resistance, these are difficult to realize often.
The utility model content
The purpose of this utility model just provides a kind of batteries monomer battery voltage pick-up unit, to solve the low and high problem of installation cost of existing measurement mechanism measuring accuracy.
The utility model is achieved in that a kind of batteries monomer battery voltage pick-up unit, this device includes the switching network of gating battery, the striding capacitance C that from common mode voltage, separates differential mode voltage, the microcontroller of gating drive circuit and band analog to digital converter, described switching network connects described microcontroller through described striding capacitance C, and the output of described microcontroller connects described switching network through described gating drive circuit.
The utility model provides a kind of switching network of electric charge uniflux and a kind of voltage detecting circuit that the unfixed striding capacitance C of polarity is constituted of utilizing.Switching network is subjected to the control closure of microcontroller, and gating electric battery joint cell is reflected on the striding capacitance C this batteries voltage; When switch disconnects, still keep the voltage of this batteries on the striding capacitance C.Microcontroller is handled after analog to digital conversion the voltage signal that collects, can accurately measure the magnitude of voltage of cell in the electric battery, also can draw simultaneously the capacity of battery and state and and other batteries between numerical value such as difference, and shown as required.
Described switching network of the present utility model, include the juxtaposed gating switch Kn of a leu preface, the end of gating switch Kn connects the positive pole of head end battery in the electric battery and the negative pole of end cell, and connect the series connection node in crosstalk pond in each in regular turn, the other end of each gating switch Kn connects at interval, form two sys nodes, this two sys node is switched to the two ends of described striding capacitance C, and ground connection K switch d connects respectively at the two ends of striding capacitance C
1, Kd
2Back ground wire, the two ends of striding capacitance C are also distinguished serial door K switch m
1, Km
2After connect on the analog to digital converter that is connected to altogether in the described microcontroller.
Gating switch Kn in the switching network 1 described in the utility model preferably is chosen as the monomer switch of two-way shutoff, as selects switching devices such as triode, optocoupler, relay for use.Like this, it is minimum that the quantity of the gating switch Kn in switching network 1 just can reach, and circuit structure is simple, and can adapt to the need of work of non-polar striding capacitance C.
After adopting certain the joint cell in the switching network gating electric battery of the present utility model, it is high-end that the two ends of non-polar striding capacitance C all may become voltage, therefore need be judged the state at striding capacitance C two ends by microcontroller earlier, again by grounding switch Kd
1Or Kd
2Closure, with the voltage low side ground connection of striding capacitance C, door close K switch m then
1Or Km
2, the high-pressure side of striding capacitance C and the analog to digital converter in the microcontroller are joined, this voltage signal imports microcontroller into through after the analog to digital conversion, measures processing by microcontroller, thereby draws the magnitude of voltage of this joint cell; Closed afterwards another grounding switch Kd
2Or Kd
1, the high-end electric charge of voltage of striding capacitance C is discharged by ground wire.Can begin the voltage measurement of next joint cell afterwards.
The utility model is more accurate to the measurement of the voltage of the cell in the electric battery, and the usage quantity of components and parts can reduce that half is many, and cost is low, the reliability height.The utility model more is applicable to and adopts discrete component to make.
Below in conjunction with accompanying drawing the utility model is further described.
Description of drawings
Fig. 1 is a structured flowchart of the present utility model.
Embodiment
As shown in Figure 1, the switching network 1 of this device is connected to microcontroller 2 through striding capacitance C, and the output of microcontroller 2 is through gating drive circuit 3 gauge tap networks 1.The display device 4 that on microcontroller 2, also can connect the human computer interaction.
Switching network 1 includes the juxtaposed gating switch Kn of a leu preface, and the quantity of gating switch Kn can determine according to the number of batteries of measuring object, and only than number of batteries Duo one get final product.The left end of each gating switch Kn connects the positive pole of head end battery in the electric battery and the negative pole of end cell, and connects the series connection node in crosstalk pond in each in regular turn; The other end of each gating switch Kn connects at interval, forms two sys nodes, and this two sys node is switched to the two ends of striding capacitance C, and ground connection K switch d connects respectively at the two ends of striding capacitance C
1, Kd
2Back ground wire, the two ends of striding capacitance C are also distinguished serial door K switch m
1, Km
2After connect on the analog to digital converter that is connected to altogether in the microcontroller 2.
The course of work of this device is: earlier by microcontroller 2 initialization, judge whether the equal operate as normal of all parts, if the situation of makeing mistakes is arranged, then show; If normal, just can carry out voltage detecting.Head end cell with electric battery is the example explanation, and the detection method of all the other batteries is similar.
At first, microcontroller 2 is by a pair of gating switch Kn in the gating drive circuit 3 gauge tap networks 1
1And Kn
2Closure makes battery A be communicated with charging with striding capacitance C; After striding capacitance C charging reaches the accuracy requirement of setting, disconnect gating switch Kn
1And Kn
2After this to detect the lower end of striding capacitance C be the voltage low side to microcontroller 2, just the grounding switch Kd that links to each other with striding capacitance C of control
2Closure makes the voltage low side ground connection of striding capacitance C, discharges the electric charge of this capacitor plate, simultaneously door close K switch m
1, the analog to digital converter voltage of striding capacitance C is high-end and in the microcontroller 2 links to each other, treat analog to digital converter read in the respective value signal and transform finish after, control grounding switch Kd
1Closure discharges the electric charge of this capacitor plate.Microcontroller 2 is measured processing, thereby draws the accurate magnitude of voltage of this joint cell.After this, microcontroller 2 carries out the operation and the surveying work of similar other batteries of gating.
Because striding capacitance C do not distinguish polarity, with a certain batteries UNICOM after, striding capacitance C is stored charge, and reflects the voltage of this batteries; After switching network disconnected, the difference of the voltage at striding capacitance C two ends can continue to reflect the voltage in selected energising pond.Striding capacitance C is non-polar, and it is high-end that its two ends all can be used as voltage, and the input end by the analog to digital converter in door switch Km and the microcontroller 2 links to each other.
Between striding capacitance C and analog to digital converter, can select whether insert operational amplifier and carry out impedance matching.If the access operational amplifier, then the voltage of striding capacitance C is high-end links to each other with an input end of operational amplifier, and the output of amplifier links to each other with the input of analog to digital converter.When fault took place, the voltage of striding capacitance C may be higher than the operating voltage of operational amplifier and analog to digital converter, and therefore the input port at analog to digital converter can connect a voltage stabilizing diode that increases anti-overvoltage.
Claims (4)
1, a kind of batteries monomer battery voltage pick-up unit, it is characterized in that this device includes the switching network of gating battery (1), the striding capacitance C that from common mode voltage, separates differential mode voltage, the microcontroller (2) of gating drive circuit (3) and band analog to digital converter, described switching network (1) connects described microcontroller (2) through described striding capacitance C, and the output of described microcontroller (2) connects described switching network (1) through described gating drive circuit (3).
2, batteries monomer battery voltage pick-up unit according to claim 1 is characterized in that being connected to the display device (4) that man-machine interaction is used on described microcontroller (2).
3, batteries monomer battery voltage pick-up unit according to claim 1, it is characterized in that described switching network (1) includes the juxtaposed gating switch Kn of a leu preface, the end of gating switch Kn connects the positive pole of head end battery in the electric battery and the negative pole of end cell, and connect the series connection node in crosstalk pond in each in regular turn, the other end of each gating switch Kn connects at interval, form two sys nodes, this two sys node is switched to the two ends of described striding capacitance C, and ground connection K switch d connects respectively at the two ends of striding capacitance C
1, Kd
2Back ground wire, the two ends of striding capacitance C are also distinguished serial door K switch m
1, Km
2After connect on the analog to digital converter that is connected to altogether in the described microcontroller (2).
4, batteries monomer battery voltage pick-up unit according to claim 3 is characterized in that the monomer switch that the described gating switch Kn in the described switching network (1) is two-way shutoff.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920101538U CN201373909Y (en) | 2009-02-17 | 2009-02-17 | Device for testing voltage of single battery of battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920101538U CN201373909Y (en) | 2009-02-17 | 2009-02-17 | Device for testing voltage of single battery of battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201373909Y true CN201373909Y (en) | 2009-12-30 |
Family
ID=41499994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920101538U Expired - Fee Related CN201373909Y (en) | 2009-02-17 | 2009-02-17 | Device for testing voltage of single battery of battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201373909Y (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806866A (en) * | 2010-04-07 | 2010-08-18 | 大连交通大学 | Monomer battery voltage measurement circuit of fuel cell stack |
| CN101806640A (en) * | 2010-04-20 | 2010-08-18 | 杭州和利时自动化有限公司 | Measurement system of thermal resistance signal |
| CN102445662A (en) * | 2010-10-13 | 2012-05-09 | 北汽福田汽车股份有限公司 | Single battery information collecting device and battery information collecting system |
| CN102565713A (en) * | 2010-12-22 | 2012-07-11 | 三美电机株式会社 | Flying capacitor type voltage detecting circuit and battery protection integrated circuit |
| CN102866356A (en) * | 2011-07-04 | 2013-01-09 | 赵恩海 | Method for measuring voltage of 16-section series battery pack |
| CN103616557A (en) * | 2013-10-29 | 2014-03-05 | 广东易事特电源股份有限公司 | A voltage detecting circuit for single batteries in a series storage battery set, a detecting method for the same, and a detecting device for the same |
| CN106597306A (en) * | 2016-12-13 | 2017-04-26 | 四川德源电气有限公司 | Sensor used for detecting fault of storage battery |
| CN106772077A (en) * | 2016-12-13 | 2017-05-31 | 四川德源电气有限公司 | A kind of accumulator failure detection method |
| CN107664726A (en) * | 2016-07-28 | 2018-02-06 | 盐城市惠众新能源科技有限公司 | The control method of switching network detecting system and switching network detecting system |
| CN108139447A (en) * | 2015-10-13 | 2018-06-08 | 罗伯特·博世有限公司 | The vehicles, the device and method for determining the voltage of the battery in the string of multiple series-connected cells of electrochemical energy accumulator |
| CN108896929A (en) * | 2018-07-26 | 2018-11-27 | 安徽锐能科技有限公司 | Method for measuring the monomer voltage of battery pack |
| CN112557935A (en) * | 2020-12-11 | 2021-03-26 | 重庆西南集成电路设计有限责任公司 | High-precision battery string single cell voltage detection system based on voltage moving |
| CN112595905A (en) * | 2019-10-01 | 2021-04-02 | 斯莱戈科技公司 | Circuit and method for real-time detection of a faulty capacitor |
| CN113063981A (en) * | 2021-03-03 | 2021-07-02 | 上海摩芯半导体技术有限公司 | Battery pack voltage acquisition circuit and voltage acquisition method |
| CN115087877A (en) * | 2020-02-12 | 2022-09-20 | 微芯片技术股份有限公司 | Measurement circuit for measuring voltage using switched capacitor and related systems, methods and apparatus |
-
2009
- 2009-02-17 CN CN200920101538U patent/CN201373909Y/en not_active Expired - Fee Related
Cited By (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101806866B (en) * | 2010-04-07 | 2013-02-13 | 大连交通大学 | Monomer battery voltage measurement circuit of fuel cell stack |
| CN101806866A (en) * | 2010-04-07 | 2010-08-18 | 大连交通大学 | Monomer battery voltage measurement circuit of fuel cell stack |
| CN101806640A (en) * | 2010-04-20 | 2010-08-18 | 杭州和利时自动化有限公司 | Measurement system of thermal resistance signal |
| CN101806640B (en) * | 2010-04-20 | 2011-11-30 | 杭州和利时自动化有限公司 | Measurement system of thermal resistance signal |
| CN102445662A (en) * | 2010-10-13 | 2012-05-09 | 北汽福田汽车股份有限公司 | Single battery information collecting device and battery information collecting system |
| CN102565713A (en) * | 2010-12-22 | 2012-07-11 | 三美电机株式会社 | Flying capacitor type voltage detecting circuit and battery protection integrated circuit |
| CN102565713B (en) * | 2010-12-22 | 2016-05-18 | 三美电机株式会社 | Speed-up condenser formula voltage detecting circuit and battery protection integrated circuit |
| CN102866356A (en) * | 2011-07-04 | 2013-01-09 | 赵恩海 | Method for measuring voltage of 16-section series battery pack |
| CN103616557A (en) * | 2013-10-29 | 2014-03-05 | 广东易事特电源股份有限公司 | A voltage detecting circuit for single batteries in a series storage battery set, a detecting method for the same, and a detecting device for the same |
| CN108139447A (en) * | 2015-10-13 | 2018-06-08 | 罗伯特·博世有限公司 | The vehicles, the device and method for determining the voltage of the battery in the string of multiple series-connected cells of electrochemical energy accumulator |
| CN107664726A (en) * | 2016-07-28 | 2018-02-06 | 盐城市惠众新能源科技有限公司 | The control method of switching network detecting system and switching network detecting system |
| CN106772077A (en) * | 2016-12-13 | 2017-05-31 | 四川德源电气有限公司 | A kind of accumulator failure detection method |
| CN106597306A (en) * | 2016-12-13 | 2017-04-26 | 四川德源电气有限公司 | Sensor used for detecting fault of storage battery |
| CN108896929A (en) * | 2018-07-26 | 2018-11-27 | 安徽锐能科技有限公司 | Method for measuring the monomer voltage of battery pack |
| CN108896929B (en) * | 2018-07-26 | 2021-10-22 | 安徽锐能科技有限公司 | Method for measuring cell voltage of battery pack |
| CN112595905A (en) * | 2019-10-01 | 2021-04-02 | 斯莱戈科技公司 | Circuit and method for real-time detection of a faulty capacitor |
| CN115087877A (en) * | 2020-02-12 | 2022-09-20 | 微芯片技术股份有限公司 | Measurement circuit for measuring voltage using switched capacitor and related systems, methods and apparatus |
| CN112557935A (en) * | 2020-12-11 | 2021-03-26 | 重庆西南集成电路设计有限责任公司 | High-precision battery string single cell voltage detection system based on voltage moving |
| CN112557935B (en) * | 2020-12-11 | 2024-06-14 | 重庆西南集成电路设计有限责任公司 | High-precision battery string single cell voltage detection system based on voltage moving |
| CN113063981A (en) * | 2021-03-03 | 2021-07-02 | 上海摩芯半导体技术有限公司 | Battery pack voltage acquisition circuit and voltage acquisition method |
| CN113063981B (en) * | 2021-03-03 | 2024-03-22 | 上海摩芯半导体技术有限公司 | Battery pack voltage acquisition circuit and voltage acquisition method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091230 Termination date: 20120217 |