CN103033751A - Battery detecting method, battery and electronic device - Google Patents
Battery detecting method, battery and electronic device Download PDFInfo
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- CN103033751A CN103033751A CN2011102948679A CN201110294867A CN103033751A CN 103033751 A CN103033751 A CN 103033751A CN 2011102948679 A CN2011102948679 A CN 2011102948679A CN 201110294867 A CN201110294867 A CN 201110294867A CN 103033751 A CN103033751 A CN 103033751A
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- 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
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- Y02E60/10—Energy storage using batteries
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Abstract
The invention aims at providing a battery detecting method, a battery and an electronic device and improving the battery safety. The battery comprises multiple parallelly-connected battery cells. The battery detecting method comprises the steps of charging the battery; obtaining a current value for judging diameters of the battery; obtaining a standard value for judging the diameters; obtaining a comparison value of the current value judging the diameters and the standard value for judging the diameters; and confirming that disconnected battery cells exist in the battery when the comparison value meets a predetermined condition. The safety of the battery in use is improved.
Description
Technical field
The invention belongs to electronic applications, particularly a kind of battery detection method, battery and electronic equipment.
Background technology
Along with the continuous progress of electronic technology, increasing electronic equipment is all towards portable future development, and such as mobile phone, notebook computer, panel computer etc., it all belongs to portable electric appts.
And portable electric appts all has the rechargeable battery powered mode of using.
Present rechargeable battery is divided into various ways, and wherein, in order to improve the flying power of battery, the many modes also of single string have become the basic structure of the battery of a lot of electronic equipments.
And prior art do not provide how many to single string and the battery operated situation of batteries detect, can't guarantee the trouble free service of battery.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of battery detection method, battery and electronic equipment, the battery monitoring of the battery core that existence is connected in parallel, the security that improves battery.
To achieve these goals, the embodiment of the invention provides a kind of battery detection method, and described battery comprises a plurality of battery cores that are connected in parallel, and described battery control method comprises:
Give described battery charging;
Obtain one of described battery and judge the currency of parameter;
Obtain a standard value of described judgement parameter;
Obtain the currency of described judgement parameter and the fiducial value of described standard value;
When described fiducial value satisfies predetermined condition, determine to have in the described battery battery core that opens circuit.
Above-mentioned battery control method wherein, also comprises have the battery core that opens circuit in determining described battery after:
Open circuit for battery core and to carry out control operation, guarantee the safe handling of described battery.
Above-mentioned battery control method, wherein, described opening circuit judges that parameter is the internal resistance of described battery and/or completely fills capacity.
Above-mentioned battery control method, wherein, described opening circuit judges that parameter is the internal resistance of described battery and completely fills capacity, the first fiducial value corresponding to described internal resistance surpasses the first variation thresholding corresponding to internal resistance, and described completely fill the second fiducial value corresponding to capacity surpass completely fill capacity corresponding second when changing thresholding, determine to exist in described a plurality of battery core that is connected in parallel the battery core that opens circuit.
Above-mentioned battery control method, wherein, described fiducial value is difference or the quotient of described currency and described standard value.
Above-mentioned battery control method, wherein, the currency of the internal resistance of described battery is: (the current open-circuit voltage of closed circuit voltage one described battery that described battery is current)/current charging current.
Above-mentioned battery control method, wherein, to be described battery judged the value of parameter in opening circuit of recording in charging process last time to the described standard value of judging parameter of opening circuit.
Above-mentioned battery control method, wherein, described opening circuit judges that parameter is the internal resistance of described battery and completely fills capacity, described opening circuit for battery core carries out control operation and specifically comprises:
Whether the difference of judging described standard value of completely filling capacity and the described currency that completely fills capacity completely fills capacity threshold more than or equal to one default first, obtains the first judged result;
Indicate described difference completely to fill capacity threshold more than or equal to described first in described the first judged result, close the charging/discharging function of described rechargeable battery.
Above-mentioned battery control method, wherein, described opening circuit for battery core carries out control operation and also comprises:
When described the first judged result indicates described difference completely to fill capacity threshold less than described first, judge that whether described difference completely fill capacity threshold more than or equal to one default second, obtain one second judged result;
Indicate described difference completely to fill capacity threshold more than or equal to described second in described the second judged result, reduce the charging current of described rechargeable battery according to described difference, otherwise it is constant to keep current charging current.
To achieve these goals, the embodiment of the invention provides a kind of battery, and described battery comprises a plurality of battery cores that are connected in parallel, and described battery also comprises:
Charging module is used for to described battery core charging;
Battery chip;
The first acquisition module is with the currency that is used for obtaining from described battery chip a judgement parameter of described battery;
The second acquisition module is for a standard value of obtaining described judgement parameter;
Comparison module is used for obtaining the currency of described judgement parameter and the fiducial value of described standard value;
Determination module is used for determining to have in the described battery battery core that opens circuit when described fiducial value satisfies predetermined condition.
Above-mentioned battery wherein, also comprises:
Control module is used for after definite described battery has the battery core that opens circuit, and opens circuit for battery core and carries out control operation, guarantees the safe handling of described battery.
Above-mentioned battery, wherein, described opening circuit judges that parameter is the internal resistance of described battery and/or completely fills capacity.
Above-mentioned battery, wherein, described opening circuit judges that parameter is the internal resistance of described battery and completely fills capacity, described determination module is used for surpassing the first variation thresholding corresponding to internal resistance at the first fiducial value corresponding to described internal resistance, and described completely fill the second fiducial value corresponding to capacity surpass completely fill capacity corresponding second when changing thresholding, determine to exist in described a plurality of battery core that is connected in parallel the battery core that opens circuit.
Above-mentioned battery, wherein, described opening circuit judges that parameter is the internal resistance of described battery and completely fills capacity that described control module specifically comprises:
The first judging unit, the difference that is used for judging described standard value of completely filling capacity and the described currency that completely fills capacity whether more than or equal to one preset first completely fill capacity threshold, obtain the first judged result;
The first control module is used for indicating described difference completely to fill capacity threshold more than or equal to described first in described the first judged result, closes the charging/discharging function of described rechargeable battery.
The second judging unit is used for when described the first judged result indicates described difference completely to fill capacity threshold less than described first, judges that whether described difference completely fill capacity threshold more than or equal to one default second, obtains one second judged result;
The second control module is used for indicating described difference completely to fill capacity threshold more than or equal to described second in described the second judged result, reduce the charging current of described rechargeable battery according to described difference, otherwise it is constant to keep current charging current.
To achieve these goals, the embodiment of the invention provides a kind of electronic equipment, comprises a battery, and described battery comprises a plurality of battery cores that are connected in parallel, and described electronic equipment also comprises:
Charging module is used for to described battery core charging;
Battery chip;
The first acquisition module is with the currency that is used for obtaining from described battery chip a judgement parameter of described battery;
The second acquisition module is for a standard value of obtaining described judgement parameter;
Comparison module is used for obtaining the currency of described judgement parameter and the fiducial value of described standard value;
Determination module is used for determining to have in the described battery battery core that opens circuit when described fiducial value satisfies predetermined condition.
Above-mentioned electronic equipment wherein, also comprises:
Control module is used for after definite described battery has the battery core that opens circuit, and opens circuit for battery core and carries out control operation, guarantees the safe handling of described battery.
Above-mentioned electronic equipment, wherein, described opening circuit judges that parameter is the internal resistance of described battery and/or completely fills capacity.
Above-mentioned electronic equipment, wherein, described opening circuit judges that parameter is the internal resistance of described battery and completely fills capacity, described determination module is used for surpassing the first variation thresholding corresponding to internal resistance at the first fiducial value corresponding to described internal resistance, and described completely fill the second fiducial value corresponding to capacity surpass completely fill capacity corresponding second when changing thresholding, determine to exist in described a plurality of battery core that is connected in parallel the battery core that opens circuit.
Above-mentioned electronic equipment, wherein, described opening circuit judges that parameter is the internal resistance of described battery and completely fills capacity that described control module specifically comprises:
The first judging unit, the difference that is used for judging described standard value of completely filling capacity and the described currency that completely fills capacity whether more than or equal to one preset first completely fill capacity threshold, obtain the first judged result;
The first control module is used for indicating described difference completely to fill capacity threshold more than or equal to described first in described the first judged result, closes the charging/discharging function of described rechargeable battery.
The second judging unit is used for when described the first judged result indicates described difference completely to fill capacity threshold less than described first, judges that whether described difference completely fill capacity threshold more than or equal to one default second, obtains one second judged result;
The second control module is used for indicating described difference completely to fill capacity threshold more than or equal to described second in described the second judged result, reduce the charging current of described rechargeable battery according to described difference, otherwise it is constant to keep current charging current.
The embodiment of the invention has following beneficial effect:
In the battery detection method of the embodiment of the invention, in the process of battery charging, meeting Real-time Obtaining one is judged the currency of parameter, and itself and standard value compared, in time to judge whether have the battery core that opens circuit in the described battery according to comparative result, thereby so that the safety assurance operation of battery there have been a clear and definite result, the security that has improved battery.
In the battery detection method of the embodiment of the invention, when in judging described battery, having the battery core that opens circuit, take such as notifying the user, close the battery charging and discharging function, reduce the mode such as total charging current, the security that has improved battery.
In the battery detection method of the embodiment of the invention, in judging described battery, have the battery core that opens circuit, but battery capacity then takes to reduce the modes such as total charging current when larger, has both guaranteed the safe handling of battery, has improved again the battery utilization rate.
Description of drawings
Figure 1 shows that the schematic flow sheet of the battery detection method of the embodiment of the invention;
Figure 2 shows that a kind of schematic flow sheet of concrete application of the battery detection method of the embodiment of the invention
Figure 3 shows that the structural representation of the battery of the embodiment of the invention.
Embodiment
In the battery detection method of the embodiment of the invention, Real-time Obtaining one is judged the value of parameter in charging process, and relatively judges whether the situation that exists battery core to open circuit, the security of raising battery according to the currency of this judgements parameter and standard value.
At this, at first the battery core potential safety hazard of bringing that opens circuit is described as follows.
For a string many battery structures also, wherein have the battery core of a plurality of parallel connections, and the part battery core in the battery core of a plurality of parallel connections opens circuit, and can't cause opening circuit of whole battery, whole battery still can be finished power supply and discharge.
Yet for the charging of battery, it has the Secure Threshold of a charging current, if the charging current of single battery core is too high, not only can cause the reduction of battery life, and can make the rechargeable battery blast in the more serious situation, jeopardizes user's personal safety.
And the charge control module of prior art can not considered the open circuit conditions of battery core, can be to fixing charging current of whole battery, be assumed to a, suppose that battery is in the situation of 4 battery core parallel connections, when not having battery core to open circuit, the charging current of each battery core is a/4, but when one of them battery core opens circuit, the charging current of normal battery core just is increased to a/3, and when wherein and individual battery core when opening circuit, the charging current of normal battery core just is increased to a/2, and will surpass the maximum charging current of battery core this moment, potential safety hazard occurs.
The battery detection method of the embodiment of the invention, described battery comprise a plurality of battery cores that are connected in parallel, and as shown in Figure 1, described battery control method comprises:
In the battery detection method of the embodiment of the invention, in the process of battery charging, meeting Real-time Obtaining one is judged the currency of parameter, and itself and standard value compared, in time to judge whether have the battery core that opens circuit in the described battery according to comparative result, thereby so that the safety assurance operation of battery there have been a clear and definite result, the security that has improved battery.
In the battery control method of the embodiment of the invention, also comprise after in determining described battery, having the battery core that opens circuit:
Open circuit for battery core and to carry out control operation, guarantee the safe handling of described battery.
At this, should open circuit for battery core that to carry out control operation can be output one information, notify the user such as the outputting alarm sound, also can be other the control operation that battery is carried out, this will be elaborated in the back.
In determining described battery, have the battery core that opens circuit, then can take safety measures to guarantee according to the concrete condition that opens circuit the safe handling of battery, further improve the security performance of battery.
In specific embodiments of the invention, only judge parameter to open circuit as the internal resistance of described battery and/or completely fill capacity and describe as example, but should be understood that, in specific embodiments of the invention, judge whether to exist battery core to judge by other parameter, the parameter that the parameter value that can cause whole battery changes as long as battery core opens circuit.
At first be described as follows can and/or completely filling based on the internal resistance of battery the ultimate principle that capacity judges that battery core opens circuit.
For a string many battery structures also, wherein there is the battery core of a plurality of parallel connections, the internal resistance of each battery core is depended in the internal resistance of whole battery.
The electrical property of supposing N battery core in parallel is identical, and the internal resistance of all battery cores is R, and at this moment, in the situation that does not have battery core to open circuit, the internal resistance of battery is R/N, and when M battery core opened circuit, then R/ (N-M) was changed in the internal resistance of battery.
Can find that in the situation of the battery core that existence is opened circuit, the internal resistance meeting of battery increases according to above description, therefore can judge whether the situation that exists battery core to open circuit according to this principle.
Two basic statement parameters of battery are completely to fill capacity and rated voltage, and capacity is constant after the series connection of the battery core of same nominal voltage and rated capacity, voltage stack, and capacity stack after the battery core parallel connection, and voltage is constant.
The electrical property of supposing N battery core in parallel is identical, and the capacity of all battery cores is A, and at this moment, in the situation that does not have battery core to open circuit, the capacity of battery is NA, and when M battery core opened circuit, then the capacity of battery can be changed into (N-M) A.
Can find that in the situation of the battery core that existence is opened circuit, the capacity of battery can reduce according to above description, therefore can judge whether the situation that exists battery core to open circuit according to this principle.
Certainly, internal resistance and completely fill capacity and can be separately be used for judging whether battery core opens circuit, and the two can combine also to judge whether battery core opens circuit, certainly the two combine more accurate, in this case, described opening circuit judges that parameter is the internal resistance of described battery and completely fills capacity, the first fiducial value corresponding to described internal resistance surpasses the first variation thresholding corresponding to internal resistance, and described completely fill the second fiducial value corresponding to capacity surpass completely fill capacity corresponding second when changing thresholding, determine to exist in described a plurality of battery core that is connected in parallel the battery core that opens circuit.
In specific embodiments of the invention, judge according to described whether the currency of parameter and the fiducial value of described standard value satisfy the pre-conditioned battery core that opens circuit that judges whether to exist, at this, this fiducial value can be difference, also can be quotient (ratio), judge that to open circuit parameter is respectively described below as internal resistance.
Be R/N such as the internal resistance of battery under normal circumstances, if current internal resistance is R/2N, show that then current internal resistance and the difference of the internal resistance of battery under normal circumstances are R/2N, it, then shows to have the battery core that opens circuit in the battery such as R/6N greater than a thresholding.
Be R/N such as the internal resistance of battery under normal circumstances, if current internal resistance is R/2N, show that then current internal resistance and the ratio of the internal resistance of battery under normal circumstances are 1/2, it, then shows to have the battery core that opens circuit in the battery such as 7/8 less than a thresholding.
Can find, different manner of comparison, corresponding thresholding is also different, in this for example explanation that differs.
All the mode with the first difference describes in follow-up embodiment, but the fiducial value that quotient or other modes are calculated (rate of change that obtains divided by standard value such as the difference of currency and standard value) also can be used for the embodiment of the invention.
In embodiments of the present invention, need to obtain the internal resistance of battery and/or completely fill the currency of capacity, can after charging, obtain by the corresponding record in the BMU chip that reads rechargeable battery for the currency that completely fills capacity, not elaborate at this.
And the current internal resistance of battery can obtain in the following way.
In charging process, record charging current;
The current closed circuit voltage of record battery in charging process;
Disconnect the charging path of battery, the current open-circuit voltage of record battery;
The currency that calculates the internal resistance of battery is: (the current closed circuit voltage of the described battery-current open-circuit voltage of described battery)/current charging current.
In embodiments of the present invention, the currency and the standard value that also need the internal resistance of the battery that will obtain and/or completely fill capacity compare, and in specific embodiments of the invention, this opens circuit the standard value of judging parameter can be by following value:
The value of when battery dispatches from the factory, testing in advance and recording; Or
The value of battery record after last time, charging was finished.
In specific embodiments of the invention, also comprise after in determining described battery, having the battery core that opens circuit: open circuit for battery core and carry out control operation, guarantee the step of the safe handling of described battery, to carry out control operation can be the control operation of directly carrying out for battery and open circuit for battery core, it can be accomplished in several ways, and is respectively described below.
＜mode one 〉
Directly close the charging/discharging function of described rechargeable battery, namely directly so that this battery can't use, this mode is the most direct.
＜mode two 〉
For a string many batteries also, when part battery core therein opens circuit, from for electrical angle, its variation only be that battery completely fills capacity, it affects cruising time, and its supply voltage is constant, that is to say, when part battery core therein opens circuit, battery still can be given the electronic equipment normal power supply, only shorten cruising time, if directly discard this battery according to mode one, then can cause great waste.
Simultaneously, mention, in the constant situation of total charging current of battery, when part battery core therein opened circuit, the increasing that fails to be convened for lack of a quorum of the charged electrical of the battery core that does not open circuit can bring potential safety hazard before.
Consider above situation, in the mode two of the embodiment of the invention, open circuit for battery core and to carry out control operation and comprise:
Quantity according to the definite battery core that opens circuit of described fiducial value;
Reduce total charging current of battery according to the quantity of the battery core that opens circuit, be lower than Secure Threshold so that flow through the charging current of the battery core that does not open circuit.
Illustrate as follows completely to fill capacity.
It is B that the complete battery of the last charging of battery of supposing 4 battery core parallel connections completely fills capacity, and last time, charging current was C;
After this charging finishes, find that it is 0.73B that expiring of battery filled volume change;
At this moment, can judge that a battery core opens circuit, then with total charging current of battery from being reduced to 3C/4.
Certainly, the above-mentioned quantity according to the definite battery core that opens circuit of described fiducial value also can be judged by the internal resistance of battery, is described as follows.
The complete internal resistance of cell of the last charging of battery of supposing 4 battery core parallel connections is R/4, and last time, charging current was E;
After this charging finishes, find that the internal resistance of battery is changed to R/2.9;
At this moment, can judge that also a battery core opens circuit, then with total charging current of battery from being reduced to 3C/4.
After reducing total charging current by above-mentioned mode, the charging current that flows through the battery core that does not open circuit still remains on C/4, is lower than Secure Threshold, battery can safe charging, and simultaneously, the battery that battery core of this generation opens circuit still can use, and has reduced waste when guaranteeing safety.
＜mode three 〉
Above-mentioned mode two can be kept the use of battery always, but consider from user perspective, battery completely fills capacity and crosses when hanging down, if battery also using, will cause the user to need frequent charge, bring great inconvenience to the user, therefore, in mode three, consider the advantage of above dual mode, decide follow-up security means according to completely filling capacity.
This security means is divided into two aspects:
1, the difference of judging described standard value of completely filling capacity and the described currency that completely fills capacity when namely the capacity attenuation of battery is larger, is directly closed the charging/discharging function of described rechargeable battery during more than or equal to a certain thresholding;
2, the difference of judging described standard value of completely filling capacity and the described currency that completely fills capacity is during less than a certain thresholding, and when namely the capacity attenuation of battery was not too large, this moment was according to the adjustment of attenuation decision charging current.
Above-mentioned first aspect can be used separately, also can combine use with second aspect.When the two combines when using, described opening circuit for battery core carries out control operation and specifically comprises:
Whether the difference of judging described standard value of completely filling capacity and the described currency that completely fills capacity completely fills capacity threshold more than or equal to one default first, obtains the first judged result;
Indicate described difference completely to fill capacity threshold more than or equal to described first in described the first judged result, close the charging/discharging function of described rechargeable battery.
When described the first judged result indicates described difference completely to fill capacity threshold less than described first, judge that whether described difference completely fill capacity threshold more than or equal to one default second, obtain one second judged result;
Indicate described difference completely to fill capacity threshold more than or equal to described second in described the second judged result, reduce the charging current of described rechargeable battery according to described difference, otherwise it is constant to keep current charging current.
Figure 2 shows that a kind of schematic flow sheet of concrete application of the battery detection method of the embodiment of the invention, comprising:
The charging beginning;
Battery management unit BMU measures charging current CC and closed circuit voltage CCV;
Battery management unit BMU charge closing switch (can utilize field effect transistor FET to realize) is measured battery open circuit voltage OCV;
Battery management unit BMU calculates the current internal resistance IR:(CCV-OCV of battery)/CC;
Whether judge the difference of IR and internal resistance standard value IR0 greater than default IR thresholding, if not, show the battery core that does not open circuit in the battery, at this moment, open charging FET, continue charging and get final product.
If the difference of IR and internal resistance standard value IR0 is greater than default IR thresholding, as show in the battery that the battery core that opens circuit may be arranged, continue this moment to utilize and completely fill capacity and judge;
Battery management unit BMU measures the current capacity FCC that completely fills;
Judge that whether FCC and the difference of completely filling volumetric standards value FCC completely fill the capacity thresholding greater than default first, if so, then showing has the battery core that opens circuit in the battery, and capacity attenuation is larger, and directly forever closed by BMU and discharge and recharge FET this moment;
If FCC and the difference of completely filling volumetric standards value FCC are completely filled the capacity thresholding less than default first, show that capacity attenuation is not large especially, therefore need further to judge;
Judge that whether FCC and the difference of completely filling volumetric standards value FCC completely fill capacity thresholding (it completely fills the capacity thresholding less than first) greater than default second, if, then show the battery core that opens circuit is arranged in the battery, but capacity attenuation is little, can continue this moment to use, then fill capacity FCC according to current expiring and upgrade total charging current, and after renewal, open charging FET, continue charging and get final product.
Completely fill the capacity thresholding if FCC and the difference of completely filling volumetric standards value FCC are less than or equal to default second, then show the battery core that does not open circuit in the battery, directly open charging FET this moment, continue charging and get final product.
The embodiment of the invention also comprises a kind of battery, and described battery comprises a plurality of battery cores that are connected in parallel, and as shown in Figure 3, described battery also comprises:
The charging module (not shown) is used for to described battery core charging;
The battery chip (not shown);
The first acquisition module is with the currency that is used for obtaining from described battery chip a judgement parameter of described battery;
The second acquisition module is for a standard value of obtaining described judgement parameter;
Comparison module is used for obtaining the currency of described judgement parameter and the fiducial value of described standard value;
Determination module is used for determining to have in the described battery battery core that opens circuit when described fiducial value satisfies predetermined condition.
The battery of the embodiment of the invention also opens circuit for battery core by control module and carries out control operation have the battery core that opens circuit in determining described battery after, guarantees the safe handling of described battery.
Described opening circuit judges that parameter is the internal resistance of described battery and/or completely fills capacity.
Described opening circuit judges that parameter is the internal resistance of described battery and completely fills capacity, described determination module is used for surpassing the first variation thresholding corresponding to internal resistance at the first fiducial value corresponding to described internal resistance, and described completely fill the second fiducial value corresponding to capacity surpass completely fill capacity corresponding second when changing thresholding, determine to exist in described a plurality of battery core that is connected in parallel the battery core that opens circuit.
Described opening circuit judges that parameter is the internal resistance of described battery and completely fills capacity that described control module specifically comprises:
The first judging unit, the difference that is used for judging described standard value of completely filling capacity and the described currency that completely fills capacity whether more than or equal to one preset first completely fill capacity threshold, obtain the first judged result;
The first control module is used for indicating described difference completely to fill capacity threshold more than or equal to described first in described the first judged result, closes the charging/discharging function of described rechargeable battery.
The second judging unit is used for when described the first judged result indicates described difference completely to fill capacity threshold less than described first, judges that whether described difference completely fill capacity threshold more than or equal to one default second, obtains one second judged result;
The second control module is used for indicating described difference completely to fill capacity threshold more than or equal to described second in described the second judged result, reduce the charging current of described rechargeable battery according to described difference, otherwise it is constant to keep current charging current.
The function of above-mentioned modules/unit can be realized by the battery management unit BMU of battery, but also can realize separately.
The embodiment of the invention also provides a kind of electronic equipment, comprises a battery, and described battery comprises a plurality of battery cores that are connected in parallel, and described electronic equipment also comprises:
Charging module is used for to described battery core charging;
Battery chip;
The first acquisition module is with the currency that is used for obtaining from described battery chip a judgement parameter of described battery;
The second acquisition module is for a standard value of obtaining described judgement parameter;
Comparison module is used for obtaining the currency of described judgement parameter and the fiducial value of described standard value;
Determination module is used for determining to have in the described battery battery core that opens circuit when described fiducial value satisfies predetermined condition.
The electronic equipment of the embodiment of the invention also opens circuit for battery core by control module and carries out control operation have the battery core that opens circuit in determining described battery after, guarantees the safe handling of described battery.
Described opening circuit judges that parameter is the internal resistance of described battery and/or completely fills capacity.
Described opening circuit judges that parameter is the internal resistance of described battery and completely fills capacity, described determination module is used for surpassing the first variation thresholding corresponding to internal resistance at the first fiducial value corresponding to described internal resistance, and described completely fill the second fiducial value corresponding to capacity surpass completely fill capacity corresponding second when changing thresholding, determine to exist in described a plurality of battery core that is connected in parallel the battery core that opens circuit.
Described opening circuit judges that parameter is the internal resistance of described battery and completely fills capacity that described control module specifically comprises:
The first judging unit, the difference that is used for judging described standard value of completely filling capacity and the described currency that completely fills capacity whether more than or equal to one preset first completely fill capacity threshold, obtain the first judged result;
The first control module is used for indicating described difference completely to fill capacity threshold more than or equal to described first in described the first judged result, closes the charging/discharging function of described rechargeable battery.
The second judging unit is used for when described the first judged result indicates described difference completely to fill capacity threshold less than described first, judges that whether described difference completely fill capacity threshold more than or equal to one default second, obtains one second judged result;
The second control module is used for indicating described difference completely to fill capacity threshold more than or equal to described second in described the second judged result, reduce the charging current of described rechargeable battery according to described difference, otherwise it is constant to keep current charging current.
The above only is preferred embodiment of the present invention, and is in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, is equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (19)
1. battery detection method, described battery comprises a plurality of battery cores that are connected in parallel, and it is characterized in that, described battery control method comprises:
Give described battery charging;
Obtain one of described battery and judge the currency of parameter;
Obtain a standard value of described judgement parameter;
Obtain the currency of described judgement parameter and the fiducial value of described standard value;
When described fiducial value satisfies predetermined condition, determine to have in the described battery battery core that opens circuit.
2. battery control method according to claim 1 is characterized in that, also comprises have the battery core that opens circuit in determining described battery after:
Open circuit for battery core and to carry out control operation, guarantee the safe handling of described battery.
3. battery control method according to claim 1 and 2 is characterized in that, described opening circuit judges that parameter is the internal resistance of described battery and/or completely fills capacity.
4. battery control method according to claim 3, it is characterized in that, described opening circuit judges that parameter is the internal resistance of described battery and completely fills capacity, the first fiducial value corresponding to described internal resistance surpasses the first variation thresholding corresponding to internal resistance, and described completely fill the second fiducial value corresponding to capacity surpass completely fill capacity corresponding second when changing thresholding, determine to exist in described a plurality of battery core that is connected in parallel the battery core that opens circuit.
5. battery control method according to claim 4 is characterized in that, described fiducial value is difference or the quotient of described currency and described standard value.
6. battery control method according to claim 3 is characterized in that, the currency of the internal resistance of described battery is: (the current open-circuit voltage of closed circuit voltage one described battery that described battery is current)/current charging current.
7. battery control method according to claim 1 is characterized in that, to be described battery judged the value of parameter in opening circuit of recording in charging process last time to the described standard value of judging parameter of opening circuit.
8. battery control method according to claim 2 is characterized in that, described opening circuit judges that parameter is the internal resistance of described battery and completely fills capacity, and described opening circuit for battery core carries out control operation and specifically comprise:
Whether the difference of judging described standard value of completely filling capacity and the described currency that completely fills capacity completely fills capacity threshold more than or equal to one default first, obtains the first judged result;
Indicate described difference completely to fill capacity threshold more than or equal to described first in described the first judged result, close the charging/discharging function of described rechargeable battery.
9. battery control method according to claim 8 is characterized in that, described opening circuit for battery core carries out control operation and also comprise:
When described the first judged result indicates described difference completely to fill capacity threshold less than described first, judge that whether described difference completely fill capacity threshold more than or equal to one default second, obtain one second judged result;
Indicate described difference completely to fill capacity threshold more than or equal to described second in described the second judged result, reduce the charging current of described rechargeable battery according to described difference, otherwise it is constant to keep current charging current.
10. battery, described battery comprises a plurality of battery cores that are connected in parallel, and it is characterized in that, described battery also comprises:
Charging module is used for to described battery core charging;
Battery chip;
The first acquisition module is with the currency that is used for obtaining from described battery chip a judgement parameter of described battery;
The second acquisition module is for a standard value of obtaining described judgement parameter;
Comparison module is used for obtaining the currency of described judgement parameter and the fiducial value of described standard value;
Determination module is used for determining to have in the described battery battery core that opens circuit when described fiducial value satisfies predetermined condition.
11. battery according to claim 10 is characterized in that, also comprises:
Control module is used for after definite described battery has the battery core that opens circuit, and opens circuit for battery core and carries out control operation, guarantees the safe handling of described battery.
12. according to claim 10 or 11 described batteries, it is characterized in that described opening circuit judges that parameter is the internal resistance of described battery and/or completely fills capacity.
13. battery according to claim 12, it is characterized in that, described opening circuit judges that parameter is the internal resistance of described battery and completely fills capacity, described determination module is used for surpassing the first variation thresholding corresponding to internal resistance at the first fiducial value corresponding to described internal resistance, and described completely fill the second fiducial value corresponding to capacity surpass completely fill capacity corresponding second when changing thresholding, determine to exist in described a plurality of battery core that is connected in parallel the battery core that opens circuit.
14. battery according to claim 11 is characterized in that, described opening circuit judges that parameter is the internal resistance of described battery and completely fills capacity that described control module specifically comprises:
The first judging unit, the difference that is used for judging described standard value of completely filling capacity and the described currency that completely fills capacity whether more than or equal to one preset first completely fill capacity threshold, obtain the first judged result;
The first control module is used for indicating described difference completely to fill capacity threshold more than or equal to described first in described the first judged result, closes the charging/discharging function of described rechargeable battery.
The second judging unit is used for when described the first judged result indicates described difference completely to fill capacity threshold less than described first, judges that whether described difference completely fill capacity threshold more than or equal to one default second, obtains one second judged result;
The second control module is used for indicating described difference completely to fill capacity threshold more than or equal to described second in described the second judged result, reduce the charging current of described rechargeable battery according to described difference, otherwise it is constant to keep current charging current.
15. an electronic equipment comprises a battery, described battery comprises a plurality of battery cores that are connected in parallel, and it is characterized in that, described electronic equipment also comprises:
Charging module is used for to described battery core charging;
Battery chip;
The first acquisition module is with the currency that is used for obtaining from described battery chip a judgement parameter of described battery;
The second acquisition module is for a standard value of obtaining described judgement parameter;
Comparison module is used for obtaining the currency of described judgement parameter and the fiducial value of described standard value;
Determination module is used for determining to have in the described battery battery core that opens circuit when described fiducial value satisfies predetermined condition.
16. electronic equipment according to claim 15 is characterized in that, also comprises:
Control module is used for after definite described battery has the battery core that opens circuit, and opens circuit for battery core and carries out control operation, guarantees the safe handling of described battery.
17. according to claim 15 or 16 described electronic equipments, it is characterized in that described opening circuit judges that parameter is the internal resistance of described battery and/or completely fills capacity.
18. electronic equipment according to claim 17, it is characterized in that, described opening circuit judges that parameter is the internal resistance of described battery and completely fills capacity, described determination module is used for surpassing the first variation thresholding corresponding to internal resistance at the first fiducial value corresponding to described internal resistance, and described completely fill the second fiducial value corresponding to capacity surpass completely fill capacity corresponding second when changing thresholding, determine to exist in described a plurality of battery core that is connected in parallel the battery core that opens circuit.
19. electronic equipment according to claim 16 is characterized in that, described opening circuit judges that parameter is the internal resistance of described battery and completely fills capacity that described control module specifically comprises:
The first judging unit, the difference that is used for judging described standard value of completely filling capacity and the described currency that completely fills capacity whether more than or equal to one preset first completely fill capacity threshold, obtain the first judged result;
The first control module is used for indicating described difference completely to fill capacity threshold more than or equal to described first in described the first judged result, closes the charging/discharging function of described rechargeable battery.
The second judging unit is used for when described the first judged result indicates described difference completely to fill capacity threshold less than described first, judges that whether described difference completely fill capacity threshold more than or equal to one default second, obtains one second judged result;
The second control module is used for indicating described difference completely to fill capacity threshold more than or equal to described second in described the second judged result, reduce the charging current of described rechargeable battery according to described difference, otherwise it is constant to keep current charging current.
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