CN102680904A - Battery internal temperature detection circuit and detection method - Google Patents
Battery internal temperature detection circuit and detection method Download PDFInfo
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- CN102680904A CN102680904A CN2012101519609A CN201210151960A CN102680904A CN 102680904 A CN102680904 A CN 102680904A CN 2012101519609 A CN2012101519609 A CN 2012101519609A CN 201210151960 A CN201210151960 A CN 201210151960A CN 102680904 A CN102680904 A CN 102680904A
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Abstract
The invention relates to a battery internal temperature detection circuit and a detection method. The battery internal temperature detection circuit is characterized by comprising a battery to be detected, an alternate current source exciting circuit, a battery voltage detection circuit and a phase difference meter, wherein the two ends of the battery are respectively connected with the alternate current source exciting circuit and the battery voltage detection circuit; the alternate current source exciting circuit translates an alternating voltage signal containing zero-frequency component into an alternate current signal so as to excite the battery; the battery voltage detection circuit is used for detecting the response signal of the alternate current source exciting circuit; the excitation signal of the alternate current source exciting circuit is input into the phase difference meter, and the battery voltage detection circuit detects the response signal so as to input the phase difference meter; and the phase difference value of the excitation signal and the response signal of the two poles of the battery is obtained by the phase difference meter, and the internal temperature information of the battery is obtained through a D-value algorithm. The battery internal temperature detection circuit and the detection method provided by the invention can be broadly applied in the temperature detection of the battery.
Description
Technical field
The present invention relates to a kind of testing circuit and detection method, particularly about a kind of internal temperature of battery testing circuit and detection method.
Background technology
Lithium battery is widely used in fields such as mobile communication, vehicle, instrument now; But the security of lithium battery is the focus that people pay close attention to most always, thereby the security of lithium battery finds expression in the safety problem that battery appears in the lithium battery temperature control that causes owing to outside or inner condition more.The quick variation of internal temperature of battery often occurs in Millisecond in the scope of tens of seconds levels.The acute variation of internal temperature of battery may cause closing of membrane layer or rupture, thereby the aging aggravation of electrolytic solution discharges more heat, finally causes temperature control.Traditional battery temperature is measured the surface temperature of the thermometer measure battery of outside commonly used.In general, the surface temperature of battery is the result of the LPF of internal temperature of battery, and the response internal temperature of battery changes fast so be difficult in time.Show that according to present research battery temperature is at 70 degrees centigrade, membrane layer is general just maybe be dangerous, especially when battery is in high SOC (state-of-charge).
Summary of the invention
To the problems referred to above, the purpose of this invention is to provide a kind of internal temperature of battery testing circuit and detection method that can in time respond the internal temperature of battery variation.
For realizing above-mentioned purpose; The present invention takes following technical scheme: a kind of internal temperature of battery testing circuit; It is characterized in that: it comprises battery to be detected, ac current source exciting circuit, battery voltage detection circuit and phasometer; Said battery two ends connect said alternating current exciting circuit and battery voltage detection circuit respectively, after the ac voltage signal that said alternating current exciting circuit will contain DC component changes ac current signal into, encourage said battery; Said battery voltage detection circuit is used to detect the response signal of said battery to said alternating current exciting circuit; The pumping signal of said alternating current exciting circuit is imported said phasometer; The detected response signal of said battery voltage detection circuit is also imported said phasometer; Obtain the phase difference value of said pumping signal and battery the two poles of the earth response signal through said phasometer, obtain the internal temperature information of said battery through the difference algorithm.
Said ac current source exciting circuit comprises alternating current driving source, amplifier, triode and the resistance that contains DC component, and said alternating current driving source output terminal connects the negative input of said amplifier and an input end of said phasometer respectively; The output terminal of said amplifier connects said transistor base, and collector connects said anode, and emitter is with after said amplifier positive input is parallelly connected, through said resistance eutral grounding; Said GND ground connection.
Said battery voltage detection circuit comprises capacitance and buffering amplifier; Said capacitance one end connects said anode; The other end connects said buffer amplifier, after said battery response voltage target signal filter DC component, imports in the said phasometer through said amplifier.
Said triode adopts NMOSFET pipe or NPN type pipe.
A kind of internal temperature of battery detection method based on above-mentioned testing circuit; It may further comprise the steps: the relational query table of 1) setting up phase differential and internal temperature of battery: the internal temperature of battery testing circuit is inserted with battery to be detected in (1); And put into temperature control box, prepare to detect; (2) battery is placed a period of time in temperature control box, made the battery surface temperature consistent with internal temperature of battery; (3) load alternating current at the battery two ends by the alternating current exciting circuit, and with this alternating current input phase difference meter; (4) detect the frequency signal at tested battery two ends through battery voltage detection circuit, and this frequency signal is transferred to phasometer; (5) by phasometer the frequency signal that loads alternating current and battery two ends is carried out phase difference calculating, obtain phase differential, and the record Current Temperatures; (6) judge whether all temperature acquisition points are accomplished,, then generate the relational query table of phase place and internal temperature of battery if accomplish; Otherwise, then change the temperature control box temperature, return said step (1) and detect again; 2) load alternating current to battery to be detected by the ac current source exciting circuit; Battery detects phase differential one time at set intervals in discharge or charging process, obtain current internal temperature of battery according to phase place and internal temperature of battery question blank, difference algorithm and the phase differential that records then.
The present invention is owing to take above technical scheme; It has the following advantages: the present invention is owing to adopt the temperature that directly obtains battery through the characteristic of measurements and calculations battery; This temperature is compared the temperature that can foresee battery faster with traditional external thermometer; Thereby the safe condition of predicting battery is in advance avoided dangerous generation and is avoided battery to suffer damage, and promotes the health degree of battery.The present invention can extensively use in battery temperature detects.
Description of drawings
Fig. 1 is a testing circuit one-piece construction synoptic diagram of the present invention;
Fig. 2 is a testing circuit integrated circuit principle schematic of the present invention;
Fig. 3 is the schematic flow sheet that the present invention sets up phase place and internal temperature of battery relational query table;
Fig. 4 be the present invention when galvanic anode characteristic frequency scope is 40～100Hz, the graph of relation of galvanic anode phase shift and temperature:
Fig. 5 be the present invention when cell cathode characteristic frequency scope is 10～30Hz, the graph of relation of cell cathode phase shift and temperature.
Embodiment
The present invention is based on the corresponding relation that Anode of lithium cell and negative electrode change with battery temperature for the phase shift of concrete frequency signal response, and measures the battery phase shift in real time, and then the detection method of prediction internal temperature of battery.Below in conjunction with accompanying drawing and embodiment the present invention is carried out detailed description.
Like Fig. 1, shown in Figure 2; Internal temperature of battery testing circuit of the present invention comprises battery to be detected 1, ac current source exciting circuit 2, battery voltage detection circuit 3 and phasometer 4; Battery 1 two ends connect alternating current exciting circuit 2 and battery voltage detection circuit 3 respectively; After the ac voltage signal that alternating current exciting circuit 2 will contain DC component changes ac current signal into, excitation battery 1; Battery voltage detection circuit 3 is used to detect the response signal of 1 pair of alternating current exciting circuit 2 of battery.The pumping signal input phase difference meter 4 of alternating current exciting circuit 2; Battery voltage detection circuit 3 detected response signals are input phase difference meter 4 also; After phasometer 4 carries out the phase differential computing; Obtain the phase difference value of pumping signal and battery 1 the two poles of the earth response signal, can obtain the internal temperature information of battery 1 through difference algorithm of the prior art.
In the foregoing description; As shown in Figure 2; Ac current source exciting circuit 2 comprises alternating current driving source 5, amplifier A0, triode Q0 and the resistance R 0 that contains DC component, and alternating current driving source 5 output terminals connect the negative input of amplifier A0 and an input end of phasometer 4 respectively; The output terminal of amplifier A0 connects triode Q0 base stage, and triode Q0 collector connects battery 1 positive pole, and triode Q0 emitter is with after amplifier A0 positive input is parallelly connected, through resistance R 0 ground connection.Wherein, battery 1 minus earth.Amplifier A0; Triode Q0 and resistance R 0 constitutes negative-feedback circuit, and amplifier A0 is according to resistance R 0 feedback quantity of positive input input, with the ac signal which of amplifier A0 negative input input relatively after; The conducting amount of triode Q0 is regulated in output, to realize output stable AC electric current.
Among above-mentioned each embodiment; As shown in Figure 2, battery voltage detection circuit 3 comprises capacitance C0 and buffering amplifier U0, and capacitance C0 one end connects battery 1 positive pole; The other end connects buffer amplifier U0; After battery 1 response voltage target signal filter DC component, U0 amplifies signal through amplifier, then in the input phase difference meter 4.
Among above-mentioned each embodiment, triode Q0 can adopt NMOSFET pipe or NPN type pipe.
As shown in Figure 3, internal temperature of battery detection method of the present invention may further comprise the steps:
1) set up the relational query table of phase differential and internal temperature of battery:
(1) battery to be detected is inserted the internal temperature of battery testing circuit, and put into temperature control box, prepare to detect;
(2) battery is placed a period of time in temperature control box, be in stable temperature environment, make the battery surface temperature consistent with internal temperature of battery to guarantee battery; Wherein, battery is the temperature control ability decision by volume of battery and temperature control box standing time.
(3) when the battery surface temperature is consistent with internal temperature of battery, load alternating current at the battery two ends by the alternating current exciting circuit, and with this alternating current input phase difference meter;
(4) detect the frequency signal at tested battery two ends through battery voltage detection circuit, and this frequency signal is transferred to phasometer;
(5) by phasometer the frequency signal that loads alternating current and battery two ends is carried out phase difference calculating, obtain phase differential, and the record Current Temperatures;
(6) judge whether all temperature acquisition points are accomplished,, then generate the relational query table of phase place and internal temperature of battery if accomplish; Otherwise, then change the temperature control box temperature, return step (1) and detect again.
2) load alternating current to battery to be detected by the ac current source exciting circuit; Battery detects phase differential one time at set intervals in discharge or charging process, obtain current internal temperature of battery according to the phase place in the step 1) and internal temperature of battery question blank, difference algorithm and the phase differential that records then.
In sum, the present invention is through between galvanic anode and negative electrode, loading the current signal of different frequency, thereby obtains the response of battery to pumping signal, i.e. the variation that produces with the current signal that between anode and negative electrode, loads of the voltage of galvanic anode and negative electrode.Because all there is phase shift in various degree in the two poles of the earth of battery to the response of the pumping signal of characteristic frequency separately, and become correlativity (like Fig. 4, shown in Figure 5) with the temperature of battery.Therefore, the present invention gathers the variation (feedback) of battery the two poles of the earth cell voltage through battery the two poles of the earth are loaded driving source, obtains concrete difference through the phase differential to excitation source signal and battery the two poles of the earth voltage change signal.The present invention is the temperature that directly obtains battery through the characteristic of measurements and calculations battery; This temperature is compared the temperature that can foresee battery faster with traditional external thermometer; Thereby the safe condition of predicting battery is in advance avoided dangerous generation and is avoided battery to suffer damage, and promotes the health degree of battery.The present invention can also carry out battery and exchange internal resistance measurement.
Above-mentioned each embodiment only is used to explain the present invention; The connection of each parts and structure all can change to some extent; On the basis of technical scheme of the present invention; All improvement and equivalents of the connection and the structure of individual component being carried out according to the principle of the invention all should not got rid of outside protection scope of the present invention.
Claims (6)
1. internal temperature of battery testing circuit; It is characterized in that: it comprises battery to be detected, ac current source exciting circuit, battery voltage detection circuit and phasometer; Said battery two ends connect said alternating current exciting circuit and battery voltage detection circuit respectively; After the ac voltage signal that said alternating current exciting circuit will contain DC component changes ac current signal into, encourage said battery; Said battery voltage detection circuit is used to detect the response signal of said battery to said alternating current exciting circuit; The pumping signal of said alternating current exciting circuit is imported said phasometer; The detected response signal of said battery voltage detection circuit is also imported said phasometer; Obtain the phase difference value of said pumping signal and battery the two poles of the earth response signal through said phasometer, obtain the internal temperature information of said battery through the difference algorithm.
2. a kind of internal temperature of battery testing circuit as claimed in claim 1; It is characterized in that: said ac current source exciting circuit comprises alternating current driving source, amplifier, triode and the resistance that contains DC component, and said alternating current driving source output terminal connects the negative input of said amplifier and an input end of said phasometer respectively; The output terminal of said amplifier connects said transistor base, and collector connects said anode, and emitter is with after said amplifier positive input is parallelly connected, through said resistance eutral grounding; Said GND ground connection.
3. a kind of internal temperature of battery testing circuit as claimed in claim 1; It is characterized in that: said battery voltage detection circuit comprises capacitance and buffering amplifier; Said capacitance one end connects said anode; The other end connects said buffer amplifier, after said battery response voltage target signal filter DC component, imports in the said phasometer through said amplifier.
4. a kind of internal temperature of battery testing circuit as claimed in claim 2; It is characterized in that: said battery voltage detection circuit comprises capacitance and buffering amplifier; Said capacitance one end connects said anode; The other end connects said buffer amplifier, after said battery response voltage target signal filter DC component, imports in the said phasometer through said amplifier.
5. like claim 1 or 2 or 3 or 4 described a kind of internal temperature of battery testing circuits, it is characterized in that: said triode adopts NMOSFET pipe or NPN type pipe.
6. internal temperature of battery detection method like any said testing circuit of claim 1～5, it may further comprise the steps:
1) set up the relational query table of phase differential and internal temperature of battery:
(1) battery to be detected is inserted the internal temperature of battery testing circuit, and put into temperature control box, prepare to detect;
(2) battery is placed a period of time in temperature control box, made the battery surface temperature consistent with internal temperature of battery;
(3) load alternating current at the battery two ends by the alternating current exciting circuit, and with this alternating current input phase difference meter;
(4) detect the frequency signal at tested battery two ends through battery voltage detection circuit, and this frequency signal is transferred to phasometer;
(5) by phasometer the frequency signal that loads alternating current and battery two ends is carried out phase difference calculating, obtain phase differential, and the record Current Temperatures;
(6) judge whether all temperature acquisition points are accomplished,, then generate the relational query table of phase place and internal temperature of battery if accomplish; Otherwise, then change the temperature control box temperature, return said step (1) and detect again;
2) load alternating current to battery to be detected by the ac current source exciting circuit; Battery detects phase differential one time at set intervals in discharge or charging process, obtain current internal temperature of battery according to phase place and internal temperature of battery question blank, difference algorithm and the phase differential that records then.
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| CN2012101519609A CN102680904A (en) | 2012-05-15 | 2012-05-15 | Battery internal temperature detection circuit and detection method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102981127A (en) * | 2012-12-24 | 2013-03-20 | 天津力神电池股份有限公司 | Testing method for simulation temperature discharging of polymer lithium ion battery |
| CN103645382A (en) * | 2013-12-13 | 2014-03-19 | 艾德克斯电子（南京）有限公司 | On-line battery internal resistance measuring apparatus and measuring method thereof |
| WO2014095279A1 (en) * | 2012-12-21 | 2014-06-26 | Continental Automotive Gmbh | Method for determining a temperature of a cell in a battery, determination device and battery |
| CN104937387A (en) * | 2013-01-11 | 2015-09-23 | 阿尔卑斯绿色器件株式会社 | Method for measuring temperature of electrical storage device |
| CN105378498A (en) * | 2013-07-10 | 2016-03-02 | 阿尔卑斯绿色器件株式会社 | Method for estimating state of electricity storage device |
| CN106842050A (en) * | 2017-01-24 | 2017-06-13 | 中国电力科学研究院 | A kind of battery temperature Forecasting Methodology and device |
| CN109659998A (en) * | 2019-01-03 | 2019-04-19 | 歌尔科技有限公司 | Battery protection circuit, protection method and wearable device |
| CN110816366A (en) * | 2019-10-31 | 2020-02-21 | 上海交通大学 | Temperature estimation method, system, medium and equipment suitable for interior of single battery |
| CN111000297A (en) * | 2018-10-04 | 2020-04-14 | 日本烟草产业株式会社 | Inspiratory component generation apparatus, control circuit, control method, and control program |
| CN111146481A (en) * | 2018-11-02 | 2020-05-12 | 丰田自动车株式会社 | Fuel cell system |
| CN111751733A (en) * | 2020-07-11 | 2020-10-09 | 郑州大学 | Calibration method and detection method for internal temperature of energy storage battery |
| CN117110914A (en) * | 2023-10-24 | 2023-11-24 | 宁德时代新能源科技股份有限公司 | Battery temperature measuring method and device, electronic equipment and storage medium |
| WO2024040626A1 (en) * | 2022-08-24 | 2024-02-29 | 北京华卓精科科技股份有限公司 | Temperature measurement method and apparatus based on synchronous detection |
| CN117872138A (en) * | 2024-01-24 | 2024-04-12 | 深圳市华杰数字能源有限公司 | Battery detection circuit and electronic equipment |
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2012
- 2012-05-15 CN CN2012101519609A patent/CN102680904A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2014095279A1 (en) * | 2012-12-21 | 2014-06-26 | Continental Automotive Gmbh | Method for determining a temperature of a cell in a battery, determination device and battery |
| CN102981127A (en) * | 2012-12-24 | 2013-03-20 | 天津力神电池股份有限公司 | Testing method for simulation temperature discharging of polymer lithium ion battery |
| CN104937387A (en) * | 2013-01-11 | 2015-09-23 | 阿尔卑斯绿色器件株式会社 | Method for measuring temperature of electrical storage device |
| CN105378498A (en) * | 2013-07-10 | 2016-03-02 | 阿尔卑斯绿色器件株式会社 | Method for estimating state of electricity storage device |
| CN105378498B (en) * | 2013-07-10 | 2017-11-14 | 阿尔卑斯电气株式会社 | Electrical storage device method for estimating state |
| CN103645382A (en) * | 2013-12-13 | 2014-03-19 | 艾德克斯电子（南京）有限公司 | On-line battery internal resistance measuring apparatus and measuring method thereof |
| CN106842050A (en) * | 2017-01-24 | 2017-06-13 | 中国电力科学研究院 | A kind of battery temperature Forecasting Methodology and device |
| CN111000297A (en) * | 2018-10-04 | 2020-04-14 | 日本烟草产业株式会社 | Inspiratory component generation apparatus, control circuit, control method, and control program |
| CN111146481B (en) * | 2018-11-02 | 2023-04-21 | 丰田自动车株式会社 | Fuel cell system |
| CN111146481A (en) * | 2018-11-02 | 2020-05-12 | 丰田自动车株式会社 | Fuel cell system |
| CN109659998A (en) * | 2019-01-03 | 2019-04-19 | 歌尔科技有限公司 | Battery protection circuit, protection method and wearable device |
| CN110816366A (en) * | 2019-10-31 | 2020-02-21 | 上海交通大学 | Temperature estimation method, system, medium and equipment suitable for interior of single battery |
| CN110816366B (en) * | 2019-10-31 | 2022-12-09 | 上海交通大学 | Temperature estimation method, system, medium and device suitable for inside of single battery |
| CN111751733A (en) * | 2020-07-11 | 2020-10-09 | 郑州大学 | Calibration method and detection method for internal temperature of energy storage battery |
| CN111751733B (en) * | 2020-07-11 | 2023-09-22 | 郑州大学 | Calibration method and detection method for internal temperature of energy storage battery |
| WO2024040626A1 (en) * | 2022-08-24 | 2024-02-29 | 北京华卓精科科技股份有限公司 | Temperature measurement method and apparatus based on synchronous detection |
| CN117110914A (en) * | 2023-10-24 | 2023-11-24 | 宁德时代新能源科技股份有限公司 | Battery temperature measuring method and device, electronic equipment and storage medium |
| CN117110914B (en) * | 2023-10-24 | 2024-04-05 | 宁德时代新能源科技股份有限公司 | Battery temperature measuring method and device, electronic equipment and storage medium |
| CN117872138A (en) * | 2024-01-24 | 2024-04-12 | 深圳市华杰数字能源有限公司 | Battery detection circuit and electronic equipment |
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Application publication date: 20120919 |