CN201184909Y - Electric quantity display apparatus - Google Patents
Electric quantity display apparatus Download PDFInfo
- Publication number
- CN201184909Y CN201184909Y CNU2007201719169U CN200720171916U CN201184909Y CN 201184909 Y CN201184909 Y CN 201184909Y CN U2007201719169 U CNU2007201719169 U CN U2007201719169U CN 200720171916 U CN200720171916 U CN 200720171916U CN 201184909 Y CN201184909 Y CN 201184909Y
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- 238000012360 testing method Methods 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 12
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 238000007599 discharging Methods 0.000 description 9
- 238000004891 communication Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000178 monomer Substances 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- GMWTXQKKRDUVQG-WOPPDYDQSA-N 4-amino-5-bromo-1-[(2r,3s,4s,5r)-4-hydroxy-5-(hydroxymethyl)-3-methyloxolan-2-yl]pyrimidin-2-one Chemical compound C[C@H]1[C@H](O)[C@@H](CO)O[C@H]1N1C(=O)N=C(N)C(Br)=C1 GMWTXQKKRDUVQG-WOPPDYDQSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The utility model discloses a power display device which comprises a detection unit, a calculating unit and a display unit. The detection unit detects the charge or the discharge state of a battery pack and detects the voltage value and the current value of the battery pack; the computing unit is connected with the detection unit, calculates the increased or the decreased power of the battery pack according to the charge or the discharge state, the voltage value and the current value of the battery pack detected by the detection unit and carries out the update of the residual power value of the battery pack; the display unit is connected with the calculating unit and displays the residual power value of the battery pack. The power display device calculates the change of the power of the battery pack and carries out the timely update of the residual power of the battery pack through the detection of the charge or the discharge state, the voltage value and the current value of the battery pack, thereby being able to accurately display the residual power of the battery pack; furthermore, the structure of the power display device is simpler and can be realized through an ordinary chip and an element, thereby having lower cost.
Description
[technical field]
The utility model relates to the battery technology field, relates in particular to electric quantity display device.
[background technology]
In the use of electric battery, people often need to understand it and can also how long work, and therefore need the electric weight of electric battery be shown.
At present, a kind of mode that battery electric quantity is shown is, at first obtain from second microcomputer of battery pack side and be used for the information that battery dump energy shows by serial communication, carrying out battery dump energy according to the information that obtains shows, then, obtain the information that is used for authentication processing by serial communication from second microcomputer of battery pack side, carry out authentication processing, judge whether the electric battery that is connected on the camera body is regular electric battery according to the information that obtains; After above-mentioned authentication processing,, upgrade the battery dump energy content displayed according to the information that is used for the battery dump energy demonstration that obtains from the microcomputer of battery pack side by serial communication.
In the mode that above-mentioned electric weight shows, obtain battery dump energy by microcomputer, and also battery is carried out authentication processing, circuit is comparatively complicated, and cost is bigger.
[summary of the invention]
Goal of the invention of the present utility model provides a kind of electric quantity display device, can show battery electric quantity exactly, and simple in structure.
To achieve the above object of the invention, the utility model proposes following technical scheme:
A kind of electric quantity display device comprises detecting unit, computing unit and display unit:
Described detecting unit detects batteries charging or discharge condition, and detects the magnitude of voltage and the current value of electric battery; Described computing unit links to each other with described detecting unit and according to the detected battery set charge/discharge state of described detecting unit, magnitude of voltage and current value, the electric weight that the counting cell group increases or reduces, and in view of the above the electric battery residual electric quantity is upgraded; Described display unit links to each other with described computing unit and described electric battery residual electric quantity is shown.
Preferably, also comprise the self discharge computing unit, be used for when electric battery is in idle condition, the electric weight that the self discharge of counting cell group reduces, and in view of the above the electric battery residual electric quantity is upgraded.
Preferably, described detecting unit also is provided with the temperature value that the thermal resistor test side is used to detect electric battery; Described self discharge computing unit is adjusted the electric battery self-discharge rate according to described temperature value.
Wherein, described detecting unit comprises chip BQ2060.
Wherein, described computing unit comprises chip 24LC01.
Wherein, described display unit comprises 5 LED display lamps.As can be seen from the above technical solutions, the utility model is by the detection to the charging and discharging state of electric battery and magnitude of voltage, current value, accurately calculate the electric weight that electric battery obtains or loses, the electric battery dump energy is upgraded timely, show by display unit then.Structure of the present utility model is comparatively simple, can realize that cost is lower by common chip and components and parts.
[description of drawings]
Fig. 1 is a structured flowchart of the present utility model;
Fig. 2 is the circuit diagram of the utility model embodiment.
[embodiment]
Below in conjunction with specific embodiment the technical solution of the utility model is described in detail.
The utility model provides a kind of electric quantity display device, as described in Figure 1, comprising: detecting unit, being used to detect electric battery is the charge or discharge state, and detects the magnitude of voltage and the current value of electric battery.Computing unit is used for according to the detected battery set charge/discharge state of described detecting unit, magnitude of voltage and current value, the electric weight that the counting cell group increases or reduces, and in view of the above the electric battery residual electric quantity is upgraded.Display unit is used for described electric battery residual electric quantity is shown.
Its course of work and principle are that at first, detecting unit detects the state of current electric battery, is charging, discharge condition, or does not have the idle condition that discharges and recharges.If charged state then according to the magnitude of voltage and the current value that detect, calculates the charge value of inflow, according to this charge value the electric battery residual electric quantity is increased then; If discharge condition then according to the magnitude of voltage and the current value that detect, calculates the charge value of outflow, according to this charge value the electric battery residual electric quantity is reduced then.After the renewal, can upgrade by the electric weight display unit.
Wherein, display unit shows and can show according to the reference model of setting the electric battery dump energy, such as being that the Full Charge Capacity reference shows the electric battery dump energy with last discharge capacity detected value (FCC), display unit can also be that Full Charge Capacity is with reference to the electric battery dump energy is shown with the design capacity value.
For the calculating that makes dump energy more accurate, as further improvement of the utility model, the utility model device also comprises the self discharge computing unit, be used for being in idle condition when electric battery, when not discharging and recharging, electric battery is carried out the calculating of self discharge, draw the electric weight of minimizing, and in the electric battery residual electric quantity, deduct this charge value.
Because temperature is bigger to the influence of electric battery self discharge, therefore, self discharge calculating of the present utility model also counts the temperature factor of electric battery.By the temperature value of detecting unit detection electric battery, the self discharge computing unit can be adjusted the electric battery self-discharge rate according to described temperature value.Through practical experience and Theoretical Calculation, the temperature value of detected electric battery is a benchmark with 25 ℃, 10 ℃ of every increases, and then described electric battery self-discharge rate increases by 1 times.
In concrete circuit was realized, as shown in Figure 2, detecting unit generally can comprise chip BQ2060, and peripheral circuit, and computing unit generally can comprise chip 24LC01, and display unit generally can comprise 5 LED display lamps.
The characteristics of chip BQ2060 are as follows:
1, provides measurement accurately to battery.
2, support SBS intelligent battery data standard V1.1.
3, support 2-WIRE SMBUS standard V1.1, can with PCE or 1-WIRE HDQ16 interface communication.
4, report monomer battery voltage.
5, to the battery protecting plate circuit monitors and the control output that discharges and recharges the MOSFET pipe is provided.
6, the measurement of voltage, electric current, temperature is provided 15 measuring accuracy.
7, use the V-F transducer to measure charging current, and multiple compensation correction mode is arranged, make voltage accuracy less than 16uV.
8, power consumption is less than 0.5mW.
9, provide 4 sections or 5 sections LED demonstration residual capacities.
Each pin function is as follows:
HDQ16: the two-way I/O mouth of serial communication.
ESCL: serial storage clock output.
ESDA: serial data, the two-way I/O mouth in address are used to transmit data and address between BQ2060 and chip external memory.
RBI: the register input that resets, when BQ2060 was in park mode, this pin was used to wake up the register of BQ2060.
REG: voltage-regulation output, this pin is used for stablizing the supply voltage of BQ2060.
VOUT: the power supply supply side of chip external memory.
VCC:BQ2060 power supply supply side.
VSS: earth terminal.
DISP:LED shows control output.
The LED1-LED5:LED display module drives output.
DFC: discharge control output.
CFC: charging control output.
CVON: voltage divider control end.
THON: thermal resistor control end.
TS: thermistor detects the voltage input.
SRC: the current detecting pin is used for detecting the instant electric current in loop.
SR1-SR2: charging and discharging currents detects pin, is used for electric weight and calculates.
VCELL1-VCELL4: monomer battery voltage input end.
SMBD: data SMBUS, two-way I/O mouth is used for BQ2060 is read or write data and address.
SMBC: clock SMBUS, two-way I/O mouth.
Concrete job description: 2060 counting cell electric weight are to flow through the electric current that detects ohmically input and output by detection to realize, 2060 also detect cell voltage, charging and discharging currents, estimating battery self discharge, battery temperature simultaneously.2060 working voltage frequency converters (VFC) discharge and recharge measurement, with (ADC) cell voltage, electric current, temperature are measured.
1, counting of charging/discharging: by the detection resistance between SR1, SR2, VFC detects the voltage that flows through this resistance and comes counting of charging/discharging, when VSR＞0 is discharge for charging, VSR＜0.
2, voltage detecting and current detecting: 2060 detect monomer battery voltage by VCELL1-VCELL4, and detected value is delivered in the VOLTAGE register.The voltage of SRC detection R5 detects the charging and discharging currents in the loop, and voltage is to bear and detected value is sent among the CURRENT during discharge for just during charging.
3, temperature detection: NTC detects battery temperature, begins temperature detection when THON is closed, and detected value is sent among the TEMPREATURE.
4, GAS GAUGE register: RM: the residual capacity register, initialization RM is 0, its value increases in the charging process, up to FCC, discharge process or only its value of discharge process reduce up to 0.And 2060 to provide a voltage in three voltage sections (ED2, ED1, ED0) to RM be the calibration of benchmark.DC: design capacity register, this register value of being set by the user, this value is also as working to the last minute the reference of battery capacity in the electric weight display mode.FCC: last discharge capacity detected value, along with the value of the FCC that discharges can be upgraded next time, and updating value sent among the LAS TMEASURED DISCHARGE CAPACITY EE.DCR: discharge gage number register.
5, electric weight shows: when DISP has the signal of a high-to-low, promptly pushbutton switch is pressed more than the 250ms, but the demonstration time can not be long, the time begin to show electric weight (the demonstration time is 4S).LED shows that RM value can have dual mode, i.e. reference model and absolute mode, 2060 are full battery electric quantity reference with FCC when with reference model, when with absolute mode with DC for expiring the battery electric quantity reference.
Show that control pin DISP continues to show when having received 5 LEDs, BQ2060 detects charging and discharging currents by SR1, SR2, and in conjunction with multiple compensation correction pattern, makes the maximization of electric weight display precision, show battery electric quantity step by step by five sections LED, every lamp represents 25%.LED passes through+4V power supply acquisition voltage.See the following form:
| LED1 | LED2 | LED3 | LED4 | LED5 | |
| EDVO＝1 | Close | Close | Close | Close | Close |
| ＜20％ | Open | Close | Close | Close | Close |
| ≥20％，＜40％ | Open | Open | Close | Close | Close |
| ≥40％，＜60％ | Open | Open | Open | Close | Close |
| ≥60，＜80％ | Open | Open | Open | Open | Close |
| ≥80％ | Open | Open | Open | Open | Open |
5, self discharge is calculated: for accurate estimating battery electric weight, 2060 also want correct estimating battery self discharge, the algorithm of estimating battery self discharge writes in the eeprom memory, promptly can make the value of RM reduce REMAI NING CAPACITY/256 at set intervals, self discharge only can be carried out under the situation of charging and discharging currents not having, once a day.This algorithm is a temperature reference point with 25 ℃, and temperature doubles than 25 ℃ of every high 10 ℃ of self-discharge rates, and temperature just reduces one times than 25 ℃ whenever low 10 ℃ of self-discharge rates.
6, defencive function: 2060 super-charge super-discharge control pin connects the grid that discharges and recharges control P-MOSFET respectively, detects over-charging of battery and crosses when putting when 2060, and the super-charge super-discharge control pin can send low level, and P-MOSFET is disconnected.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.
Claims (6)
1, a kind of electric quantity display device is characterized in that, comprises detecting unit, computing unit and display unit:
Described detecting unit detects batteries charging or discharge condition, and detects the magnitude of voltage and the current value of electric battery; Described computing unit links to each other with described detecting unit and according to the detected battery set charge/discharge state of described detecting unit, magnitude of voltage and current value, the electric weight that the counting cell group increases or reduces, and in view of the above the electric battery residual electric quantity is upgraded; Described display unit links to each other with described computing unit and described electric battery residual electric quantity is shown.
2, electric quantity display device according to claim 1 is characterized in that, also comprises the self discharge computing unit, be used for when electric battery is in idle condition, and the electric weight that the self discharge of counting cell group reduces, and in view of the above the electric battery residual electric quantity is upgraded.
3, electric quantity display device according to claim 2 is characterized in that:
Described detecting unit also is provided with the temperature value that the thermal resistor test side is used to detect electric battery;
Described self discharge computing unit is adjusted the electric battery self-discharge rate according to described temperature value.
4, according to each described electric quantity display device in the claim 1～3, it is characterized in that: described detecting unit comprises chip BQ2060.
5, according to each described electric quantity display device in the claim 1～3, it is characterized in that described computing unit comprises chip 24LC01.
6, according to each described electric quantity display device in the claim 1～3, it is characterized in that: described display unit comprises 5 LED display lamps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201719169U CN201184909Y (en) | 2007-09-25 | 2007-09-25 | Electric quantity display apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201719169U CN201184909Y (en) | 2007-09-25 | 2007-09-25 | Electric quantity display apparatus |
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| CN201184909Y true CN201184909Y (en) | 2009-01-21 |
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| CNU2007201719169U Expired - Lifetime CN201184909Y (en) | 2007-09-25 | 2007-09-25 | Electric quantity display apparatus |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102262216A (en) * | 2010-05-29 | 2011-11-30 | 比亚迪股份有限公司 | Electric quantity detection method for chargeable battery and apparatus thereof |
| CN102590750A (en) * | 2011-01-07 | 2012-07-18 | 宏碁股份有限公司 | Battery capacity calculating method and battery capacity calculating device |
| CN102788959A (en) * | 2012-08-31 | 2012-11-21 | 长沙理工大学 | Method for detecting charge-discharge state of storage battery of stand-alone photovoltaic power generation system |
| CN102830360A (en) * | 2012-08-22 | 2012-12-19 | 杭州杰能动力有限公司 | Method and system for acquiring real-time battery capacity in motion of car and electric car |
| CN103033758A (en) * | 2012-10-25 | 2013-04-10 | 北京君正集成电路股份有限公司 | Display electric quantity value calibration method and device |
| CN102104259B (en) * | 2009-12-16 | 2013-08-07 | 比亚迪股份有限公司 | Electric quantity detecting and controlling method and device for rechargeable battery |
| CN103278779A (en) * | 2013-06-14 | 2013-09-04 | 天津新日机电有限公司 | Storage battery capacity monitoring system |
| CN103364735A (en) * | 2013-07-17 | 2013-10-23 | 湖南九天科技股份有限公司 | Method and device for accurately displaying battery electric quantity of portable power source |
| CN104635164A (en) * | 2015-01-26 | 2015-05-20 | 上海天奕达电子科技有限公司 | Battery charging and discharging stability testing method of intelligent terminal and intelligent terminal |
| CN106972584A (en) * | 2017-05-03 | 2017-07-21 | 苏州佳世达电通有限公司 | A kind of charge capacity detecting display system and display device |
| CN108494055A (en) * | 2018-04-26 | 2018-09-04 | 深圳贝仕达克技术股份有限公司 | Control method, lithium battery protection board and the storage medium of lithium battery protection board |
-
2007
- 2007-09-25 CN CNU2007201719169U patent/CN201184909Y/en not_active Expired - Lifetime
Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102104259B (en) * | 2009-12-16 | 2013-08-07 | 比亚迪股份有限公司 | Electric quantity detecting and controlling method and device for rechargeable battery |
| CN102262216B (en) * | 2010-05-29 | 2014-03-19 | 比亚迪股份有限公司 | Electric quantity detection method for chargeable battery and apparatus thereof |
| CN102262216A (en) * | 2010-05-29 | 2011-11-30 | 比亚迪股份有限公司 | Electric quantity detection method for chargeable battery and apparatus thereof |
| CN102590750A (en) * | 2011-01-07 | 2012-07-18 | 宏碁股份有限公司 | Battery capacity calculating method and battery capacity calculating device |
| CN102590750B (en) * | 2011-01-07 | 2014-09-10 | 宏碁股份有限公司 | Battery capacity calculating method and battery capacity calculating device |
| CN102830360A (en) * | 2012-08-22 | 2012-12-19 | 杭州杰能动力有限公司 | Method and system for acquiring real-time battery capacity in motion of car and electric car |
| CN102788959A (en) * | 2012-08-31 | 2012-11-21 | 长沙理工大学 | Method for detecting charge-discharge state of storage battery of stand-alone photovoltaic power generation system |
| CN102788959B (en) * | 2012-08-31 | 2014-12-03 | 长沙理工大学 | Method for detecting charge-discharge state of storage battery of stand-alone photovoltaic power generation system |
| CN103033758A (en) * | 2012-10-25 | 2013-04-10 | 北京君正集成电路股份有限公司 | Display electric quantity value calibration method and device |
| CN103278779A (en) * | 2013-06-14 | 2013-09-04 | 天津新日机电有限公司 | Storage battery capacity monitoring system |
| CN103364735A (en) * | 2013-07-17 | 2013-10-23 | 湖南九天科技股份有限公司 | Method and device for accurately displaying battery electric quantity of portable power source |
| CN103364735B (en) * | 2013-07-17 | 2015-11-04 | 长沙市博巨兴电子科技有限公司 | The accurate display packing of portable power source battery electric quantity and device |
| CN104635164A (en) * | 2015-01-26 | 2015-05-20 | 上海天奕达电子科技有限公司 | Battery charging and discharging stability testing method of intelligent terminal and intelligent terminal |
| CN104635164B (en) * | 2015-01-26 | 2018-05-11 | 上海卓易科技股份有限公司 | The battery charging and discharging stability test method and intelligent terminal of a kind of intelligent terminal |
| CN106972584A (en) * | 2017-05-03 | 2017-07-21 | 苏州佳世达电通有限公司 | A kind of charge capacity detecting display system and display device |
| CN108494055A (en) * | 2018-04-26 | 2018-09-04 | 深圳贝仕达克技术股份有限公司 | Control method, lithium battery protection board and the storage medium of lithium battery protection board |
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