CN103545564A - Charging battery unit and defect detecting method thereof - Google Patents
Charging battery unit and defect detecting method thereof Download PDFInfo
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- CN103545564A CN103545564A CN201210246854.9A CN201210246854A CN103545564A CN 103545564 A CN103545564 A CN 103545564A CN 201210246854 A CN201210246854 A CN 201210246854A CN 103545564 A CN103545564 A CN 103545564A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
- G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
- G01R31/387—Determining ampere-hour charge capacity or SoC
- G01R31/388—Determining ampere-hour charge capacity or SoC involving voltage measurements
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a charging battery unit and a defect detecting method thereof. The charging battery unit comprises at least one charging battery string and a battery management unit, wherein the at least one charging battery string is configured for providing a power supply to load of the charging battery unit while discharging; the battery management unit is connected with the at least one charging battery string, the battery management unit is used for judging whether the charging battery unit is in a first discharging state; if the charging battery unit is in the first discharging state, the battery managing unit measures voltage change of the at least one charging battery string in a first time interval based on a preset condition; if the voltage change exceeds a preset first threshold value, the battery managing unit judges that the charging battery unit is abnormal.
Description
Technical field
The present invention relates to a kind of rechargeable battery unit and defect inspection method thereof.
Background technology
Current, the rechargeable battery such as lithium ion battery is widely used in the equipment such as mobile terminal, electric tool, electric automobile, energy-storage system.In the rechargeable battery such as lithium ion battery, the combustible liquid organic compound of general employing is (as ethylene carbonate, propene carbonate etc.) as its electrolyte solvent, when it is when storage power state (high-voltage charge state), the positive and negative electrode material of this class rechargeable battery has very strong chemical reactivity, once therefore there is special status, probably make to occur between battery material component violent chemical reaction, thereby cause overheated, the on fire even blast of battery.Rechargeable battery outside and Interior Inducement all may cause the generation of above-mentioned special status.Here, outside inducement be often referred to abuse, misoperation or not according to require to use lithium battery (as, overcharge, external short circuit battery, hot environment use etc.), and the battery core internal short-circuit that Interior Inducement is a variety of causes to be caused (as, sneak into impurity, pole piece burr, barrier film has flaw etc.).In the prior art; conventionally in the administrative unit of rechargeable battery, added one section, two segment protects, even the battery core of rechargeable battery has all been installed separately additional to protection device (as, Thermal Cutoffs; Breaker etc.), thus the battery security risk of substantially having avoided outside inducement to cause.Yet the manufacture craft of current rechargeable battery cannot be chosen all internal short-circuit battery cores, particularly some defect battery core only just can expose in terminal use's continuous use.Therefore, electric discharge and charging detecting mechanism need to be set in the administrative unit of rechargeable battery, thereby can just be screened and stop using at the deteriorated initial stage of defect battery core, thereby effectively avoid the generation of pernicious security incident (on fire, explode).
Summary of the invention
In order to solve above-mentioned technical problem of the prior art, according to an aspect of the present invention, provide a kind of rechargeable battery unit, be applied to terminal equipment, described rechargeable battery unit comprises: at least one rechargeable battery string, and configuration load to described rechargeable battery unit when electric discharge provides power supply; Battery management unit, connects with described at least one rechargeable battery series winding, and wherein said battery management unit judges that whether described rechargeable battery unit is in the first discharge condition; If described rechargeable battery unit is in the first discharge condition, the condition of described battery management unit based on default is with the change in voltage of at least one rechargeable battery string described in very first time interval measurement; And if described change in voltage surpasses default first threshold, described battery management unit judges described rechargeable battery unit exception.
In addition, according to one embodiment of present invention, the voltage that wherein said default condition is described at least one rechargeable battery string is in the first interval; And if the voltage of described at least one rechargeable battery string is in the first interval, battery management unit is with the change in voltage of at least one rechargeable battery string described in very first time interval measurement.
In addition, according to one embodiment of present invention, wherein, under described the first discharge condition, the discharging current of described rechargeable battery unit is less than 50mA.
In addition, according to one embodiment of present invention, wherein said the first interval comprises 4 ~ 4.15V and 3.30 ~ 3.55V.
In addition, according to one embodiment of present invention, while being wherein connected with the adapter of described terminal equipment in described rechargeable battery unit, described battery management unit indicates described adapter to charge to described rechargeable battery unit with the first charged state; In described rechargeable battery unit, under the first charged state, described battery management unit is with the change in voltage of at least one rechargeable battery string described in the second time interval measurement; And if described change in voltage is less than default Second Threshold, described battery management unit judges in described rechargeable battery unit and has internal short-circuit.
In addition, according to one embodiment of present invention, wherein under described the first charged state, described in offer described rechargeable battery unit charging current be less than 100mA.
In addition, according to one embodiment of present invention, current full capacitance and specified completely corresponding relation capacitance between of wherein said battery management unit based on described rechargeable battery unit upgrades described first threshold and described Second Threshold.
In addition, according to a further aspect in the invention, a kind of rechargeable battery cell defect detection method is provided, be applied to rechargeable battery unit, described rechargeable battery unit comprises that described defect inspection method comprises: judge that whether described rechargeable battery unit is in the first discharge condition at least one rechargeable battery string of power supply is provided to the load of described rechargeable battery unit when discharging; If described rechargeable battery unit is in the first discharge condition, the condition based on default is with the change in voltage of at least one rechargeable battery string described in very first time interval measurement; And if described change in voltage is over default first threshold, judges described rechargeable battery unit exception.
In addition, according to one embodiment of present invention, the voltage that wherein said default condition is described at least one rechargeable battery string is in the first interval.
In addition, according to one embodiment of present invention, wherein, under described the first discharge condition, the discharging current of described rechargeable battery unit is less than 50mA.
In addition, according to one embodiment of present invention, wherein said the first interval comprises 4 ~ 4.15V and 3.30 ~ 3.55V.
In addition, according to one embodiment of present invention, wherein said method further comprises: while being connected with adapter in described rechargeable battery unit, indicate described adapter to charge to described rechargeable battery unit with the first charged state; In described rechargeable battery unit under the first charged state, with the change in voltage of at least one rechargeable battery string described in the second time interval measurement; And if described change in voltage is less than default Second Threshold, judges in described rechargeable battery unit and have internal short-circuit.
In addition, according to one embodiment of present invention, wherein, under described the first charged state, the charging current that offers described rechargeable battery unit is less than 100mA.
In addition, according to one embodiment of present invention, wherein the corresponding relation between the current full capacitance based on described rechargeable battery unit and specified full capacitance upgrades described first threshold and described Second Threshold.
Accompanying drawing explanation
Fig. 1 is that diagram is according to the schematic diagram of the structure of the rechargeable battery of the embodiment of the present invention; And
Fig. 2 is that diagram is according to the flow chart of the rechargeable battery cell defect detection method of the embodiment of the present invention.
Embodiment
Describe in detail with reference to the accompanying drawings according to each embodiment of the present invention.Here, it should be noted that in the accompanying drawings, identical Reference numeral is given and substantially had part identical or similar structures and function, and will omit being repeated in this description about them.
Below, with reference to Fig. 1, describe according to the rechargeable battery unit of the embodiment of the present invention.Here, according to the rechargeable battery of the embodiment of the present invention, can be applied in the equipment such as mobile terminal, electric tool, electric automobile, energy-storage system.
As shown in Figure 1, according to the rechargeable battery unit 1 of the embodiment of the present invention, can comprise at least one rechargeable battery string 11.Rechargeable battery string 11 can be realized by a plurality of chargeable battery core of any type, and can when electric discharge, the load to rechargeable battery unit 1 provide power supply.Here, when rechargeable battery string 11 in rechargeable battery unit 1 is more than one, a plurality of rechargeable battery string 11 serial or parallel connections can be had to more jumbo rechargeable battery unit 1 to provide.
Battery management unit 12 can be realized by microcontroller or module arbitrarily, and battery management unit 12 can be connected and can detect with at least one rechargeable battery string 11 voltage and the electric current of at least one rechargeable battery string 11.For example, if comprise single rechargeable battery string 11 in rechargeable battery unit 1, battery management unit 12 can be measured the voltage at these rechargeable battery string 11 two ends.In addition, the in the situation that of comprising a plurality of rechargeable battery string 11 in rechargeable battery unit 1, if a plurality of rechargeable battery string 11 parallel connections, the voltage at the sys node two ends of rechargeable battery string 11 can be measured in rechargeable battery unit 1, if and a plurality of rechargeable battery string 11 is connected, the voltage at a plurality of rechargeable battery strings 11 two ends (both positive and negative polarity of rechargeable battery unit) can be measured in rechargeable battery unit 1.
According to embodiments of the invention, battery management unit 12 can be carried out rechargeable battery cell defect Check processing.
Particularly, battery management unit 12 can judge that whether rechargeable battery unit 1 is in the first discharge condition.If rechargeable battery unit 1 is in the first discharge condition, the condition of battery management unit 12 based on default is with the change in voltage of very first time interval measurement rechargeable battery string 11.
Here, the first discharge condition can be stable low discharging current state, and under the first discharge condition, the discharging current of rechargeable battery unit 1 is less than 50mA.For example, the first discharge condition can be holding state, sleep or the off-mode of the terminal equipment that connects of rechargeable battery unit 1, now the power consumption due to terminal equipment very low (conventionally discharging current be less than 50mA) and substantially keep constant, is therefore conducive to detect the change in voltage (voltage change ratio can acutely not change) of rechargeable battery string 11 in the unit interval.Now, battery management unit 12 can determine that whether rechargeable battery unit 1 is in the first discharge condition by the discharging current of rechargeable battery unit 1.
In addition, default condition can be for the voltage of at least one rechargeable battery string 11 be in the first interval.In this case, if the voltage of at least one rechargeable battery string 11 in the first interval, battery management unit 12 is with the change in voltage of at least one rechargeable battery string 11 of very first time interval measurement.Particularly, in the situation that rechargeable battery unit 1 is the rechargeable battery such as mobile phone or panel computer, the first interval can comprise the scope of 4 ~ 4.15V and 3.30 ~ 3.55V.Here, in the scope at 4 ~ 4.15V and 3.30 ~ 3.55V, the voltage of described at least one rechargeable battery string 11 is larger with the rate of change of the variation of described at least one rechargeable battery string 11 electric weight, and under the first discharge condition of rechargeable battery unit 1, the rate of change of the voltage of at least one rechargeable battery string 11 is stable substantially, therefore selects 4 ~ 4.15V and 3.30 ~ 3.55V to be conducive to the change in voltage of rechargeable battery string 11 in the unit interval and specific threshold value to compare as the first interval.
In addition, the invention is not restricted to this, because the purposes possibility of different types of rechargeable battery unit 1 is different, and the rated output voltage of itself and in rechargeable battery unit 1 when electric discharge the characteristic area that changes of output voltage also may be different, 4 ~ 4.15V and 3.30 ~ 3.55V that therefore the first interval is described before being not limited to.Here, the characteristic area that in the time of can being chosen in 1 electric discharge of rechargeable battery unit, output voltage changes is used as first area.
In addition, for example, very first time interval can be 30 minutes.In addition, the invention is not restricted to this, as long as while discharging with the first discharge condition in rechargeable battery unit 1, very first time interval can make the voltage of at least one rechargeable battery string 11 that certain variation occurs, and can also adopt other the time interval as very first time interval.
In this case, if battery management unit 12 is determined the change in voltage of at least one rechargeable battery string 11, surpass default first threshold, battery management unit 12 judgement rechargeable battery unit 1 are abnormal.
Particularly, default first threshold can be to be greater than while discharging with the first discharge condition in normal rechargeable battery unit 1 value of the change in voltage of at least one rechargeable battery string 11 on very first time interval.Here, suppose normal at least one rechargeable battery string take the first discharge condition while discharging the change in voltage on very first time interval be △ V1, default first threshold can be greater than △ V1.According to one embodiment of present invention, first threshold Vref1 can be 1.5 times of △ V1.Here, the reason that first threshold Vref1 is set to be greater than △ V1 is: if internal short-circuit has occurred the specific rechargeable battery string at least one rechargeable battery string 11, while discharging with the first discharge condition in rechargeable battery unit 1, the change in voltage of at least one rechargeable battery string (single or connection in series-parallel) 11 can be greater than normal change in voltage.Therefore, if battery management unit 12 is determined the change in voltage of at least one rechargeable battery string 11, surpass first threshold, battery management unit 12 judgement rechargeable battery unit 1 are abnormal.
In addition, rechargeable battery unit 1 can also comprise memory cell or can memory cell be set with storage first threshold at battery management unit 12.Here, because dissimilar rechargeable battery unit 1 may have different characteristics, therefore in the time of can obtaining by the mode of great many of experiments normal rechargeable battery unit 1 here and discharge with the first discharge condition on the very first time interval value of the change in voltage of at least one rechargeable battery string 11.For example, a plurality of voltage changes of at least one rechargeable battery string in the time of can obtaining rechargeable battery unit 1 with different discharging current electric discharge very first time interval, and the plurality of voltage change is multiplied by predetermined coefficient obtains different first thresholds.In this case, when battery management unit 12 compares the change in voltage of at least one rechargeable battery string 11 and first threshold, battery management unit 12 can be based on rechargeable battery unit 1 discharge condition (as, discharging current) select corresponding first threshold further to improve the defects detection precision of rechargeable battery unit 1.
When battery management unit 12 judges that rechargeable battery unit 1 are abnormal, battery management unit 12 can directly send and represent the abnormal information in rechargeable battery unit 1 to connected terminal equipment, or battery management unit 12 can also further judge that whether rechargeable battery unit 1 is abnormal.
Particularly, when rechargeable battery unit 1 is connected with the adapter (not shown) of terminal equipment, battery management unit 12 can charge 1 with the first charged state to rechargeable battery unit by indication adapter.Here, similarly to the prior art, while being connected with the adapter of terminal equipment in rechargeable battery unit 1, battery management unit 12 can send the information relevant to charging current to terminal equipment, and terminal equipment can be controlled adapter based on this information, charging current 1 charging to rechargeable battery unit that adapter is provided with battery management unit 12.Here, the first charged state can be low current charge state.Here, under low current charge state, the charging current that offers rechargeable battery unit 1 from adapter can be less than 100mA.With the little electric current such as being less than 100mA, rechargeable battery unit 1 is charged and is conducive to detect the change in voltage (voltage change ratio can acutely not change) of rechargeable battery string 11 in the unit interval.
In rechargeable battery unit 1, under the first charged state, battery management unit 12 can be with the change in voltage of at least one rechargeable battery string 11 of the second time interval measurement.If this change in voltage is less than default Second Threshold, in battery management unit 12 at least one rechargeable battery string of judgement, there is internal short-circuit.Here, second time interval can be also 30 minutes.In addition, the invention is not restricted to this, need only in rechargeable battery unit 1 under the first charged state, second time interval can make the voltage of at least one rechargeable battery string 11 that certain variation occurs, and can also adopt other the time interval as second time interval.In addition, due to conventionally under the first charged state of rechargeable battery unit 1, on the unit interval, the change in voltage of at least one rechargeable battery string 11 substantially can be considered for linearity in most of voltage range, therefore except in rechargeable battery unit 1 near the interval complete power consumption, can on voltage range arbitrarily, measure the change in voltage of at least one rechargeable battery string 11.
In this case, if battery management unit 12 determines that the change in voltage of at least one rechargeable battery string 11 is less than default Second Threshold, in battery management unit 12 at least one rechargeable battery string of judgement, there is internal short-circuit.Particularly, default Second Threshold can be to be less than while charging with the first charged state in normal rechargeable battery unit 1 value of the change in voltage of at least one rechargeable battery string on second time interval.Here, suppose normal at least one rechargeable battery string take the first charged state while charging the change in voltage on second time interval be Δ V2, default Second Threshold can be less than Δ V2.According to one embodiment of present invention, first threshold Vref2 can be 0.8 times of Δ V2.Here, the reason that Second Threshold Vref2 is set to be less than Δ V2 is: if internal short-circuit has occurred the specific rechargeable battery string at least one rechargeable battery string 11, while charging with the first charged state in rechargeable battery unit 1, the change in voltage of at least one rechargeable battery string (single or connection in series-parallel) 11 can be less than normal change in voltage.Therefore,, if battery management unit 12 determines that the change in voltage of at least one rechargeable battery string 11 is less than Second Threshold, in battery management unit 12 at least one rechargeable battery string of judgement, there is internal short-circuit.
In this case, while there is internal short-circuit in battery management unit 12 at least one rechargeable battery string 11 of judgement, battery management unit 12 can send the information that has internal short-circuit at least one the rechargeable battery string 11 representing in rechargeable battery unit 1 to connected terminal equipment.
Here, in rechargeable battery unit 1 during in the first discharge condition, battery management unit 12 repeatedly the condition based on default with the change in voltage of at least one rechargeable battery string of very first time interval measurement, and by obtained repeatedly change in voltage and first threshold compare to reduce due to single relatively occurs wrong possible.Similarly, in rechargeable battery unit 1 during in the first charged state, battery management unit 12 can be repeatedly with the change in voltage of at least one rechargeable battery string of the second time interval measurement, and by obtained repeatedly change in voltage and Second Threshold compare to reduce due to single relatively occurs wrong possible.
In addition, according to another embodiment of the invention, battery management unit 12 can also current full capacitance and the specified completely corresponding relation between capacitance based on rechargeable battery unit 1 upgrade first threshold and Second Threshold.
Here, because its capacity of continuous use along with rechargeable battery unit 1 constantly reduces, therefore in rechargeable battery unit 1 during in the first discharge condition, the change in voltage of at least one rechargeable battery string 11 on the unit interval can constantly increase, when the continuous electric discharge of rechargeable battery 1, it is large that the change in voltage (decline) of at least one the rechargeable battery string 11 in the rechargeable battery unit 1 that capacity reduces on the unit interval can become.In addition, in rechargeable battery unit 1 during in the first charged state, the change in voltage of at least one rechargeable battery string 11 on the unit interval can also can constantly increase, when rechargeable battery 1 charging, it is large that the change in voltage (rising) of at least one the rechargeable battery string 11 in the rechargeable battery unit 1 that capacity reduces on the unit interval can become
Based on above-mentioned situation, current capacity and its rated capacity correction first threshold and Second Threshold that can be based on rechargeable battery unit 1.Here, can obtain based on cubic content measurement technology arbitrarily the current capacity of rechargeable battery unit 1.
Here, the current capacity of supposing rechargeable battery unit 1 is C
current, the rated capacity of rechargeable battery unit 1 is C
rated, and Δ V1 is the change in voltage on very first time interval when normal at least one rechargeable battery string discharges with the first discharge condition.
Change in voltage Δ V1 ' when in this case, at least one the rechargeable battery string 11 in use rechargeable battery unit 1 after a while discharges with the first discharge condition on very first time interval can become:
In this case, the change in voltage Δ V1 ' of battery management unit 12 based on new acquisition upgrades first threshold and stores first threshold, thereby further improved accuracy of detection.
Change in voltage Δ V2 ' when similarly, at least one the rechargeable battery string 11 in use rechargeable battery unit 1 after a while charges with the first charged state on second time interval can become:
In this case, the change in voltage Δ V2 ' of battery management unit 12 based on new acquisition upgrades Second Threshold and stores Second Threshold, thereby can further improve accuracy of detection.
By the way, can be by detecting the change in voltage at rechargeable battery unit 1 at least one rechargeable battery string 11 in this rechargeable battery unit 1 during in electric discharge and/or charging, and this change in voltage and predetermined threshold value are compared and determine whether rechargeable battery unit 1 exists (internal short-circuit) extremely.Whether in definite rechargeable battery unit 1, exist abnormal in the situation that, the user of terminal equipment can take out this rechargeable battery unit 1 to avoid the generation of potential accident.
Below, with reference to Fig. 2, describe according to the rechargeable battery cell defect detection method of the embodiment of the present invention.The method of Fig. 2 can be applied to the rechargeable battery unit shown in Fig. 1.Here, rechargeable battery unit comprises at least one rechargeable battery string of power supply is provided to the load of rechargeable battery unit when discharging.
As shown in Figure 2, at step S201, judge that whether rechargeable battery unit is in the first discharge condition.
Particularly, battery management unit 12 can judge that whether rechargeable battery unit 1 is in the first discharge condition.Here, the first discharge condition is stable low discharging current state, and under the first discharge condition, the discharging current of rechargeable battery unit 1 is less than 50mA.For example, the first discharge condition can be holding state, sleep or the off-mode of the terminal equipment that connects of rechargeable battery unit 1, now the power consumption due to terminal equipment very low (conventionally discharging current be less than 50mA) and substantially keep constant, is therefore conducive to detect the change in voltage (voltage change ratio can acutely not change) of rechargeable battery string 11 in the unit interval.Now, battery management unit 12 can determine that whether rechargeable battery unit 1 is in the first discharge condition by the discharging current of rechargeable battery unit 1.
Then, at step S202, if rechargeable battery unit in the first discharge condition, the condition based on default is with the change in voltage of at least one rechargeable battery string of very first time interval measurement.
Particularly, if battery management unit 12 determines that rechargeable battery unit 1 is in the first discharge condition, the condition of battery management unit 12 based on default is with the change in voltage of very first time interval measurement rechargeable battery string 11.Here, default condition can be for the voltage of at least one rechargeable battery string 11 be in the first interval.In this case, if the voltage of at least one rechargeable battery string 11 in the first interval, battery management unit 12 is with the change in voltage of at least one rechargeable battery string 11 of very first time interval measurement.Particularly, in the situation that rechargeable battery unit 1 is the rechargeable battery such as mobile phone or panel computer, the first interval can comprise the scope of 4 ~ 4.15V and 3.30 ~ 3.55V.Here, in the scope at 4 ~ 4.15V and 3.30 ~ 3.55V, the voltage of described at least one rechargeable battery string 11 is larger with the rate of change of the variation of described at least one rechargeable battery string 11 electric weight, and under the first discharge condition of rechargeable battery unit 1, the rate of change of the voltage of at least one rechargeable battery string 11 is stable substantially, therefore selects 4 ~ 4.15V and 3.30 ~ 3.55V to be conducive to the change in voltage of rechargeable battery string 11 in the unit interval and specific threshold value to compare as the first interval.In addition, the invention is not restricted to this, because the purposes possibility of different types of rechargeable battery unit 1 is different, and the rated output voltage of itself and in rechargeable battery unit 1 when electric discharge the characteristic area that changes of output voltage also may be different, 4 ~ 4.15V and 3.30 ~ 3.55V that therefore the first interval is described before being not limited to.Here, any characteristic area that in the time of can being chosen in 1 electric discharge of rechargeable battery unit, output voltage changes is used as first area.In addition, very first time interval can be 30 minutes.In addition, as long as while discharging with the first discharge condition in rechargeable battery unit 1, very first time interval can make the voltage of at least one rechargeable battery string 11 that certain variation occurs, and can also adopt other the time interval as very first time interval.
At step S203, if change in voltage surpasses default first threshold, judge rechargeable battery unit exception.
Particularly, battery management unit 12 judges whether the change in voltage of at least one rechargeable battery string 11 surpasses default first threshold.If battery management unit 12 determines that the change in voltage of at least one rechargeable battery string 11 is over default first threshold, battery management unit 12 judgement rechargeable battery unit 1 are abnormal.Here, default first threshold can be to be greater than while discharging with the first discharge condition in normal rechargeable battery unit 1 value of the change in voltage of at least one rechargeable battery string 11 on very first time interval.Here, suppose normal at least one rechargeable battery string 11 take the first discharge condition while discharging the change in voltage on very first time interval be Δ V1, default first threshold can be greater than Δ V1.According to one embodiment of present invention, first threshold Vref1 can be 1.5 times of Δ V1.Here, the reason that first threshold Vref1 is set to be greater than Δ V1 is: if internal short-circuit has occurred the specific rechargeable battery string at least one rechargeable battery string 11, while discharging with the first discharge condition in rechargeable battery unit 1, the change in voltage of at least one rechargeable battery string (single or connection in series-parallel) 11 can be greater than normal change in voltage.Therefore, if battery management unit 12 is determined the change in voltage of at least one rechargeable battery string 11, surpass first threshold, battery management unit 12 judgement rechargeable battery unit 1 are abnormal.In addition, in rechargeable battery unit 1, can also store first threshold.Here, because dissimilar rechargeable battery unit 1 may have different characteristics, therefore in the time of can obtaining by the mode of great many of experiments normal rechargeable battery unit 1 here and discharge with the first discharge condition on the very first time interval value of the change in voltage of at least one rechargeable battery string 11.For example, a plurality of voltage changes of at least one rechargeable battery string in the time of can obtaining rechargeable battery unit 1 with different discharging current electric discharge very first time interval, and the plurality of voltage change is multiplied by predetermined coefficient obtains different first thresholds.In this case, when battery management unit 12 compares the change in voltage of at least one rechargeable battery string 11 and first threshold, battery management unit 12 can be based on rechargeable battery unit 1 discharge condition (as, discharging current) select corresponding first threshold further to improve the defects detection precision of rechargeable battery unit 1.
In addition, according to another embodiment of the invention, the method for Fig. 2 can further include step: while being connected with adapter in rechargeable battery unit, indication adapter charges to rechargeable battery unit with the first charged state; In rechargeable battery unit under the first charged state, with the change in voltage of at least one rechargeable battery string of the second time interval measurement; And if change in voltage is less than default Second Threshold, judges at least one rechargeable battery string and have internal short-circuit.
Particularly, while being connected with the adapter (not shown) of terminal equipment in rechargeable battery unit 1, battery management unit 12 can indication adapter with 1 charging to rechargeable battery unit of the first charged state.Here, the first charged state can be low current charge state.Under low current charge state, the charging current that offers rechargeable battery unit 1 from adapter can be less than 100mA.With the little electric current such as being less than 100mA, rechargeable battery unit 1 is charged and is conducive to detect the change in voltage (voltage change ratio can acutely not change) of rechargeable battery string 11 in the unit interval.
In rechargeable battery unit 1, under the first charged state, battery management unit 12 is with the change in voltage of at least one rechargeable battery string 11 of the second time interval measurement.If this change in voltage is less than default Second Threshold, in battery management unit 12 at least one rechargeable battery string of judgement, there is internal short-circuit.For example, second time interval can be also 30 minutes.In addition, the invention is not restricted to this, need only in rechargeable battery unit 1 under the first charged state, second time interval can make the voltage of at least one rechargeable battery string 11 that certain variation occurs, and can also adopt other the time interval as second time interval.In addition, due to conventionally under the first charged state of rechargeable battery unit 1, on the unit interval, the change in voltage of at least one rechargeable battery string 11 is linear substantially in most of voltage range, therefore except in rechargeable battery unit 1 near the interval complete power consumption, can on voltage range arbitrarily, measure the change in voltage of at least one rechargeable battery string 11.
In this case, if battery management unit 12 determines that the change in voltage of at least one rechargeable battery string 11 is less than default Second Threshold, in battery management unit 12 at least one rechargeable battery string of judgement, there is internal short-circuit.Particularly, default Second Threshold can be to be less than while charging with the first charged state in normal rechargeable battery unit 1 value of the change in voltage of at least one rechargeable battery string on second time interval.Here, suppose normal at least one rechargeable battery string take the first charged state while charging the change in voltage on second time interval be Δ V2, default Second Threshold can be less than Δ V2.According to one embodiment of present invention, Second Threshold Vref2 can be 0.8 times of Δ V2.Here, the reason that Second Threshold Vref2 is set to be less than Δ V2 is: if internal short-circuit has occurred the specific rechargeable battery string at least one rechargeable battery string 11, while charging with the first charged state in rechargeable battery unit 1, the change in voltage of at least one rechargeable battery string (single or connection in series-parallel) 11 can be less than normal change in voltage.Therefore,, if battery management unit 12 determines that the change in voltage of at least one rechargeable battery string 11 is less than Second Threshold, in battery management unit 12 at least one rechargeable battery string of judgement, there is internal short-circuit.In addition, in rechargeable battery unit 1, can also store Second Threshold.Because dissimilar rechargeable battery unit 1 may have different characteristics, therefore in the time of can obtaining by the mode of great many of experiments normal rechargeable battery unit 1 here and charge with the first charged state on second time interval value of the change in voltage of at least one rechargeable battery string 11.For example, can obtain rechargeable battery unit 1 with a plurality of voltage changes of different charging current for charging at least one rechargeable battery string during second time interval, and the plurality of voltage change is multiplied by predetermined coefficient obtains different Second Thresholds.In this case, when battery management unit 12 compares the change in voltage of at least one rechargeable battery string 11 and Second Threshold, battery management unit 12 can be based on rechargeable battery unit 1 charged state (as, charging current) select corresponding first threshold further to improve the defects detection precision of rechargeable battery unit 1.
In this case, while there is internal short-circuit in battery management unit 12 at least one rechargeable battery string 11 of judgement, battery management unit 12 can send the information that has internal short-circuit at least one the rechargeable battery string 11 representing in rechargeable battery unit 1 to connected terminal equipment.
In addition, according to another embodiment of the invention, the method shown in Fig. 2 can further include step: the corresponding relation between the current full capacitance based on rechargeable battery unit and specified full capacitance upgrades first threshold and Second Threshold.
Particularly, battery management unit 12 corresponding relation renewal first threshold and the Second Threshold between the current full capacitance based on rechargeable battery unit 1 and specified full capacitance also.Here, because its capacity of continuous use along with rechargeable battery unit 1 constantly reduces, therefore in rechargeable battery unit 1 during in the first discharge condition, the change in voltage of at least one rechargeable battery string 11 on the unit interval can constantly increase, when the continuous electric discharge of rechargeable battery 1, it is large that the change in voltage (decline) of at least one the rechargeable battery string 11 in the rechargeable battery unit 1 that capacity reduces on the unit interval can become.In addition, in rechargeable battery unit 1 during in the first charged state, the change in voltage of at least one rechargeable battery string 11 on the unit interval can also can constantly increase, when rechargeable battery 1 charging, it is large that the change in voltage (rising) of at least one the rechargeable battery string 11 in the rechargeable battery unit 1 that capacity reduces on the unit interval can become.Based on above-mentioned situation, current capacity and its rated capacity correction first threshold and the Second Threshold of battery management unit 12 based on rechargeable battery unit 1.It should be noted that and can obtain based on cubic content measurement technology arbitrarily the current capacity of rechargeable battery unit 1.Here, the current capacity of supposing rechargeable battery unit 1 is C
current, the rated capacity of rechargeable battery unit 1 is C
rated, and Δ V1 is the change in voltage on very first time interval when normal at least one rechargeable battery string discharges with the first discharge condition.
Change in voltage Δ V1 ' when in this case, at least one the rechargeable battery string 11 in use rechargeable battery unit 1 after a while discharges with the first discharge condition on very first time interval can become:
In this case, the change in voltage Δ V1 ' of battery management unit 12 based on new acquisition upgrades first threshold and stores first threshold, thereby further improved accuracy of detection.
Change in voltage Δ V2 ' when similarly, at least one the rechargeable battery string 11 in use rechargeable battery unit 1 after a while charges with the first charged state on second time interval can become:
In this case, the change in voltage Δ V2 ' of battery management unit 12 based on new acquisition upgrades Second Threshold and stores Second Threshold, thereby can further improve accuracy of detection.
Describe each embodiment of the present invention in the above in detail.Yet, it should be appreciated by those skilled in the art that without departing from the principles and spirit of the present invention, can carry out various modifications to these embodiment, combination or sub-portfolio, and such modification should fall within the scope of the present invention.
Claims (14)
1. a rechargeable battery unit, is applied to terminal equipment, and described rechargeable battery unit comprises:
At least one rechargeable battery string, configuration load to described rechargeable battery unit when electric discharge provides power supply;
Battery management unit, connects with described at least one rechargeable battery series winding,
Wherein said battery management unit judges that whether described rechargeable battery unit is in the first discharge condition;
If described rechargeable battery unit is in the first discharge condition, the condition of described battery management unit based on default is with the change in voltage of at least one rechargeable battery string described in very first time interval measurement; And
If described change in voltage surpasses default first threshold, described battery management unit judges described rechargeable battery unit exception.
2. rechargeable battery as claimed in claim 1 unit, wherein
The voltage that described default condition is described at least one rechargeable battery string is in the first interval; And
If the voltage of described at least one rechargeable battery string is in the first interval, battery management unit is with the change in voltage of at least one rechargeable battery string described in very first time interval measurement.
3. rechargeable battery as claimed in claim 2 unit, wherein
Under described the first discharge condition, the discharging current of described rechargeable battery unit is less than 50mA.
4. rechargeable battery as claimed in claim 2 unit, wherein
Described the first interval comprises 4 ~ 4.15V and 3.30 ~ 3.55V.
5. rechargeable battery as claimed in claim 1 unit, wherein
When described rechargeable battery unit is connected with the adapter of described terminal equipment, described battery management unit indicates described adapter to charge to described rechargeable battery unit with the first charged state;
In described rechargeable battery unit, under the first charged state, described battery management unit is with the change in voltage of at least one rechargeable battery string described in the second time interval measurement; And
If described change in voltage is less than default Second Threshold, in described at least one the rechargeable battery string of described battery management unit judgement, there is internal short-circuit.
6. rechargeable battery as claimed in claim 5 unit, wherein
Under described the first charged state, described in offer described rechargeable battery unit charging current be less than 100mA.
7. rechargeable battery as claimed in claim 5 unit, wherein
Current full capacitance and specified completely corresponding relation capacitance between of described battery management unit based on described rechargeable battery unit upgrades described first threshold and described Second Threshold.
8. a rechargeable battery cell defect detection method, is applied to rechargeable battery unit, and described rechargeable battery unit comprises that described defect inspection method comprises at least one rechargeable battery string of power supply is provided to the load of described rechargeable battery unit when discharging:
Judge that whether described rechargeable battery unit is in the first discharge condition;
If described rechargeable battery unit is in the first discharge condition, the condition based on default is with the change in voltage of at least one rechargeable battery string described in very first time interval measurement; And
If described change in voltage surpasses default first threshold, judge described rechargeable battery unit exception.
9. method as claimed in claim 8, wherein
The voltage that described default condition is described at least one rechargeable battery string is in the first interval.
10. method as claimed in claim 9, wherein
Under described the first discharge condition, the discharging current of described rechargeable battery unit is less than 50mA.
11. methods as claimed in claim 9, wherein
Described the first interval comprises 4 ~ 4.15V and 3.30 ~ 3.55V.
12. methods as claimed in claim 8, further comprise:
When described rechargeable battery unit is connected with adapter, indicate described adapter to charge to described rechargeable battery unit with the first charged state;
In described rechargeable battery unit under the first charged state, with the change in voltage of at least one rechargeable battery string described in the second time interval measurement; And
If described change in voltage is less than default Second Threshold, in described at least one the rechargeable battery string of judgement, there is internal short-circuit.
13. methods as claimed in claim 12, wherein
Under described the first charged state, the charging current that offers described rechargeable battery unit is less than 100mA.
14. methods as claimed in claim 13, further comprise:
Corresponding relation between current full capacitance based on described rechargeable battery unit and specified full capacitance upgrades described first threshold and described Second Threshold.
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031301A (en) * | 1987-07-07 | 1989-02-22 | 菲利浦光灯制造公司 | Battery-powered equipment |
| JP2003346918A (en) * | 2002-05-28 | 2003-12-05 | Braun Gmbh | Managing method for rechargeable battery |
| CN101331659A (en) * | 2005-12-15 | 2008-12-24 | Nxp股份有限公司 | Battery recharge prevention principle for short battery voltage dips |
| WO2011148592A1 (en) * | 2010-05-25 | 2011-12-01 | パナソニック株式会社 | Excess current detecting circuit and battery pack |
-
2012
- 2012-07-16 CN CN201210246854.9A patent/CN103545564B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1031301A (en) * | 1987-07-07 | 1989-02-22 | 菲利浦光灯制造公司 | Battery-powered equipment |
| JP2003346918A (en) * | 2002-05-28 | 2003-12-05 | Braun Gmbh | Managing method for rechargeable battery |
| CN101331659A (en) * | 2005-12-15 | 2008-12-24 | Nxp股份有限公司 | Battery recharge prevention principle for short battery voltage dips |
| WO2011148592A1 (en) * | 2010-05-25 | 2011-12-01 | パナソニック株式会社 | Excess current detecting circuit and battery pack |
| CN102576057A (en) * | 2010-05-25 | 2012-07-11 | 松下电器产业株式会社 | Excess current detecting circuit and battery pack |
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| WO2018000437A1 (en) * | 2016-07-01 | 2018-01-04 | 深圳市大疆创新科技有限公司 | Metal battery, and battery management system and control method therefor |
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