CN103901344A - Battery residual power estimating system and estimating method thereof - Google Patents
Battery residual power estimating system and estimating method thereof Download PDFInfo
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- CN103901344A CN103901344A CN201210567762.0A CN201210567762A CN103901344A CN 103901344 A CN103901344 A CN 103901344A CN 201210567762 A CN201210567762 A CN 201210567762A CN 103901344 A CN103901344 A CN 103901344A
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Abstract
The invention discloses a battery residual power estimating system and an estimating method thereof. According to the system and the method, residual power of a battery is estimated by adding together and synthesizing two mutually perpendicular components. Voltage, current and temperature of a battery are sensed as sensing parameters, the component of dynamic internal resistance power of the battery is calculated according to preset electrical characteristic parameter and a power change lookup table and based on the sensing parameters, and the component of Coulomb counting power of the battery is calculated according to the sensing parameters and a Coulomb counting method. Then, the component of dynamic internal resistance power of the battery and the component of Coulomb counting power of the battery are added together and synthesized to calculate actual usable residual power of the battery so as to achieve the technical effect of improving the accuracy of battery residual power estimation.
Description
Technical field
The present invention is for having about a kind of battery remaining electric weight estimating system and estimating and measuring method thereof, refer to especially a kind of obtain the actual available residual electric weight of battery by vector calculation be added synthetic battery remaining electric weight estimating system and estimating and measuring method thereof with two orthogonal components.
Background technology
In recent years, universal and flourish along with running gear, how estimating accurately battery remaining electric weight has become Ge Jia manufacturer and has desired most ardently one of problem of solution.
Generally speaking, the estimation mode of the residual electric weight of conventional batteries is to utilize look-up table, as: search corresponding residual electric weight estimation with voltage.But, because the voltage of battery can be subject to the impact of discharge current, that is to say, the variation meeting of discharge current synchronously affects the estimation of battery remaining electric weight, cause estimating the battery remaining electric weight that can be along with cell voltage height bob, therefore there is the not good problem of estimation accuracy of battery remaining electric weight.
In view of this, Bian You manufacturer proposes to utilize a coulomb counting method (Coulomb Counting) to estimate battery remaining electric weight, described coulomb of counting method is also referred to as ampere hour method (Ampere-Hour), mainly based on the conservation of energy (or being called energy conservation) theorem, battery remaining electric weight before being once charging after residual electric weight deduct discharge capacity, or for front once electric discharge after residual electric weight add charge volume.Because coulomb counting method need to continue the computing that adds up or successively decrease, therefore the increase that error also can continue, so accuracy that significantly impact is estimated under long-time accumulation, in addition, the setting of initial quantity of electricity is also its source of error concerning coulomb counting method, causing the electric weight being filled with not is that its maximum makes power consumption, therefore aforesaid way still cannot effectively solve the not good problem of estimation accuracy of battery remaining electric weight.
In addition, also someone estimation mode of two kinds of battery remaining electric weight that proposes to arrange in pairs or groups, as: coulomb integral method and voltage look-up table, in order to obtain after the estimation numerical value of two residual electric weight, revest different weights to ask for synthetic residual charge value, for instance, with calculating formula " SOC=α SOC
c+ (1-α) SOC
v" to come synthetic (be " SOC in calculating formula with coulomb integral method
c") and voltage look-up table (be " SOC in calculating formula
v") two residual charge values obtaining, wherein " α " is default weighted value.Thus, just can improve the estimation accuracy of battery remaining electric weight.But, in this way in the situation that weighted value " α " cannot dynamically change, the residual charge value that above-mentioned calculating formula is obtained only can be between certain application area in accurately, misalignment between other application area, so estimation mode cannot effectively solve the not good problem of estimation accuracy of battery remaining electric weight equally.
In sum, since known prior art is medium-term and long-term, there is the not good problem of estimation accuracy of battery remaining electric weight always, be therefore necessary to propose improved technological means in fact, solve this problem.
Summary of the invention
Because the problem that prior art exists, the present invention then provides a kind of and is added synthetic battery remaining electric weight estimating system and estimating and measuring method thereof with two orthogonal components.
Provided by the present inventionly be added synthetic battery remaining electric weight estimating system with two orthogonal components, it comprises: storage module, sensing module, computing module, integration module and estimating module.Wherein, storage module is in order to store electrical specification parameter and electric quantity change look-up table; Sensing module in order to voltage, electric current and the temperature of sensing battery to produce sensor parameter; Computing module is in order to continue calculating the dynamic internal resistance index of battery according to sensor parameter, and the dynamic internal resistance index of battery that lasting basis calculates is searched described electric quantity change look-up table to generate the component of the dynamic internal resistance electric weight of battery; Integration module is in order to generate the component of battery coulomb counting electric weight with coulomb counting method according to sensor parameter; And estimating module is synthetic to calculate the actual available residual electric weight of battery in order to the component of the component of dynamic battery internal resistance electric weight and battery coulomb counting electric weight is added.
Be added synthetic battery remaining electric weight estimating and measuring method as for of the present invention with two orthogonal components, its step comprises: store in advance electrical specification parameter and electric quantity change look-up table; Voltage, electric current and the temperature of sensing battery is to produce sensor parameter; Continue to calculate the dynamic internal resistance index of battery according to sensor parameter, and continue to search electric quantity change look-up table to generate the component of the dynamic internal resistance electric weight of battery according to the dynamic internal resistance index of battery calculating; Generate the component of battery coulomb counting electric weight with coulomb counting method according to sensor parameter; The component of the component of dynamic battery internal resistance electric weight and battery coulomb counting electric weight is added synthetic to calculate the actual available residual electric weight of battery.
System and method for provided by the present invention as above, and the difference between prior art is that the present invention is that voltage, electric current and temperature by sensing battery is as sensor parameter, and according to the component of default electrical specification parameter and the dynamic internal resistance electric weight of electric quantity change look-up table collocation sensor parameter calculating battery, and according to the component of sensor parameter and coulomb counting method calculating battery coulomb counting electric weight, then again the component of the component of dynamic battery internal resistance electric weight and battery coulomb counting electric weight is added synthetic to calculate the available residual electric weight of battery reality.
By above-mentioned technological means, the present invention can reach technology effect of the estimation accuracy that improves battery remaining electric weight.
Brief description of the drawings
Accompanying drawing described herein is used to provide a further understanding of the present invention, forms the application's a part, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the present invention is added synthetic battery remaining electric weight estimating system system block diagrams with two orthogonal components.
Fig. 2 is the present invention is added synthetic battery remaining electric weight estimating and measuring method method flow diagram with two orthogonal components.
Fig. 3 is application the present invention generates the component of the dynamic internal resistance electric weight of battery schematic diagram with the dynamic internal resistance index of battery.
Fig. 4 and Fig. 5 are application the present invention is weighted processing schematic diagram with the electric discharge C number of front and back.
Fig. 6 is the schematic diagram that application the present invention defines the number percent of battery remaining electric weight.
Fig. 7 is the schematic diagram that application the present invention calculates battery remaining electric weight number percent.
[main element symbol description]
100 storage modules
110 sensing modules
120 computing modules
130 integration module
140 estimating module
150 counting modules
Embodiment
Below will coordinate graphic and embodiment to describe embodiments of the present invention in detail, and by this present invention's implementation procedure how application technology means solve technical matters and reach technology effect can be fully understood and be implemented according to this.
Explanation provided by the present invention be added synthetic battery remaining electric weight estimating system and estimating and measuring method thereof with two orthogonal components before, first the noun of institute of the present invention self-defining is explained, the dynamic internal resistance index of battery of the present invention refers to the variation (variation of voltage and present different resistance values when the interior resistance of battery can be along with battery charging and discharging of the interior resistance based on battery, as: battery is in the time discharging and recharging, its internal resistance all can increase with the change of electric weight) numerical value that calculates, can obtain corresponding electric capacity in this numerical value (being the dynamic internal resistance index of battery) mode of tabling look-up of arranging in pairs or groups, and then the component of the dynamic internal resistance electric weight of generation battery, by graphic cooperation, this part is elaborated after a while.On reality is implemented, the calculating formula of the dynamic internal resistance index of described battery can be: " (reference voltage level-closed loop magnitude of voltage) * α/(reference voltage level+β * closed loop magnitude of voltage) ", wherein " α " is enlargement ratio parameter, because deducting closed loop magnitude of voltage, reference voltage level is generally minimal value, therefore be multiplied by this enlargement ratio parameter in order to calculating; " β " is a parameter relevant with battery variety and battery serial connection number, in computation process, the magnitude of voltage detecting can be continued to bring into closed loop magnitude of voltage in this calculating formula to calculate the dynamic internal resistance index of battery, impact that can cancellation current factor in this computation process.Be noted that especially, although with the above-mentioned generating mode that illustrates the dynamic internal resistance index of battery, so the present invention is not construed as limiting with this, and any mode that continues to calculate the dynamic internal resistance index of battery by reference to magnitude of voltage and closed loop magnitude of voltage, neither departs from application category of the present invention.To coordinate again after a while the dynamic internal resistance index of graphic detailed description battery.
Below coordinate and graphicly the present invention is added to synthetic battery remaining electric weight estimating system and estimating and measuring method thereof with two orthogonal components is described further, refer to " Fig. 1 ", " Fig. 1 " is the present invention is added synthetic battery remaining electric weight estimating system system block diagrams with two orthogonal components, and this system comprises: storage module 100, sensing module 110, computing module 120, integration module 130 and estimating module 140.Wherein, storage module 100 is in order to store in advance electrical specification parameter and electric quantity change look-up table, and material behavior, electric battery that described electrical specification parameter can comprise battery are connected in series number, battery capacity size, reference voltage level, enlargement ratio, temperature corrected parameter, are connected in series the relevant parameter of number with battery variety and battery ... etc..Refer to the look-up table of the corresponding electric capacitance change of the different discharge current size of battery as for described electric quantity change look-up table, for example: the discharge currents such as 0.5C, 1C, 1.5C and 2C are until the table of comparisons of the specified maximum discharge current of battery and capacity, and the large minizone of described discharge current can be 0.25C, 0.5C, 0.75C according to actual experiment data subdividing ... Deng until specified maximum electric discharge C number or the battery power discharge electric current with arithmetic series construction.On reality is implemented, look-up table and coulomb counting corrected parameter that more can the storage temperature corresponding electric battery of storage module 100 can discharge capacity size, the component of the battery coulomb going out in order to corrected Calculation counting electric weight.In addition, above-mentioned electrical specification parameter, electric quantity change look-up table and the burning in advance of temperature variation look-up table are at ROM (Read-Only Memory, ROM), the electronics formula of erasing can be made carbon copies among ROM (Electrically Erasable Programmable Read-Only Memory, EEPROM) or fast flash memory bank (Flash ROM).
Estimating module 140 is synthetic to calculate the actual available residual electric weight of battery in order to the component of the component of dynamic battery internal resistance electric weight and battery coulomb counting electric weight is added.For instance, the component of supposing the dynamic internal resistance electric weight of battery is
the component of battery coulomb counting electric weight is
the calculating formula of synthetic two components is
because vectorial account form is prior art, therefore much more no longer to explain at this.
In addition, more can comprise counting module 150 in order to record with compare battery recycle number of times (Cycle Count) using as cell degradation parameter, this cell degradation parameter can be stored in the electrical specification parameter of storage module 100, and revises the component of the dynamic internal resistance electric weight of battery with the temperature variation look-up table in the battery temperature and the storage module 100 that record in this cell degradation parameter and sensor parameter and the coulomb counting corrected parameter of simultaneously arranging in pairs or groups in storage module 100 is revised the component of battery coulomb counting electric weight by computing module 120 and integration module 130.Taking the component of revising battery dynamic internal resistance electric weight as example, can in temperature variation look-up table, search according to the battery temperature detecting and discharge current size the weighted value of the dynamic internal resistance index of corresponding battery, the component of the dynamic internal resistance electric weight of battery going out in order to corrected Calculation, for instance, suppose that battery temperature is for " 40 " degree, discharge current size is " 1C ", the component of the dynamic internal resistance electric weight of battery is " 75 ", when obtain with the corresponding weighted value of battery temperature " 5 " by tabling look-up, the component " 75 " of this weighted value and the dynamic internal resistance electric weight of battery can be calculated to produce the component of the dynamic internal resistance electric weight of revised battery, as " 70 ".That thus, can effectively revise temperature and battery recycles the impact of number of times on battery remaining electric weight.
Then, refer to " Fig. 2 ", " Fig. 2 " is the present invention is added synthetic battery remaining electric weight estimating and measuring method method flow diagram with two orthogonal components, and its step comprises: store in advance one group of electrical specification parameter and electric quantity change look-up table (step 200); Voltage, electric current and the temperature of sensing battery is to produce sensor parameter (step 210); Continue to go out the dynamic internal resistance index of battery according to this sensor parameter and described electrical specification calculation of parameter, and continue to search described electric quantity change look-up table to generate the component (step 220) of the dynamic internal resistance electric weight of battery according to the dynamic internal resistance index of battery calculating; Generate the component (step 230) of battery coulomb counting electric weight with coulomb counting method according to sensor parameter; The component of the component of dynamic battery internal resistance electric weight and battery coulomb counting electric weight is added synthetic to calculate the actual available residual electric weight (step 240) of battery.Pass through above-mentioned steps, can be by voltage, electric current and the temperature of sensing battery as sensor parameter, and according to the component of default electrical specification parameter and the dynamic internal resistance electric weight of electric quantity change look-up table collocation sensor parameter calculating battery, and according to the component of sensor parameter and coulomb counting method calculating battery coulomb counting electric weight, then the component of the component of dynamic battery internal resistance electric weight and battery coulomb counting electric weight is added synthetic to calculate the available residual electric weight of battery reality.
On reality is implemented, what more can store in advance coulomb data correction parameter and temperature variation look-up table (step 235) and record battery recycles number of times using as cell degradation parameter, and the component of the dynamic internal resistance electric weight of battery being generated with this cell degradation parameter and temperature variation look-up table correction step 220 and step 230 and coulomb counting corrected parameter of collocation are simultaneously revised the component (step 235) of battery coulomb counting electric weight.Because the mode of revising is mentioned in above stated specification, therefore much more no longer to repeat at this.
Below coordinate " Fig. 3 " to " Fig. 7 " to illustrate as follows in the mode of embodiment, please first consult " Fig. 3 ", " Fig. 3 " is for application the present invention is with the schematic diagram of the component of the dynamic internal resistance electric weight of the dynamic internal resistance index generation battery of battery.First, " Fig. 3 " presents data in electric quantity change look-up table (that is: when the different discharge current in lines mode, in the time interval exhausting from full charging to electric weight, the corresponding relation of the dynamic internal resistance index of battery and electric capacity), its bend part is that electric capacity, curved portion are the corresponding dynamic internal resistance index of battery, in this figure, be respectively from left to right in the time of the discharge current of 2C, 1.5C, 1C and 0.5C, the corresponding relation of the dynamic internal resistance index of battery and electric capacity.Mention above, the dynamic internal resistance index of battery can be tried to achieve by the calculating formula of the dynamic internal resistance index of above-mentioned battery.On reality is implemented, taking 0.5C electric discharge as example, suppose a point that the dynamic internal resistance index of the battery calculating is illustrated for " Fig. 3 ", so can a point is mutually corresponding with the discharge current size measuring (being 0.5C electric discharge), the corresponding relation of its battery dynamic internal resistance index b and electric capacity when being stored in electric quantity change look-up table in storage module 100 and searching discharge current 0.5C, and the corresponding discharge capacity finding is made as after c value, calculate current use capacity and account for the number percent d of original total volume by the c/0.5C total volume of discharging again, this number percent is the component (being the component of the dynamic internal resistance electric weight of battery) of vertical direction.Be noted that especially, although only record the corresponding relation of the dynamic internal resistance index of four Battery packs and electric capacity in the electric quantity change look-up table of illustrating at " Fig. 3 ", but, the present invention is not construed as limiting with this, on reality is implemented, electric quantity change look-up table also can store more groups in the time of different discharge current, as: 1.3C, 1.4C ... etc., the corresponding relation of the dynamic internal resistance index of its battery and electric capacity.
As " Fig. 4 " and " Fig. 5 " illustrates, " Fig. 4 " and " Fig. 5 " is weighted the schematic diagram of processing with the electric discharge C number of front and back for applying the present invention.Mention above, storage module 100 can store electric quantity change look-up table in advance, the corresponding relation of the dynamic internal resistance index of battery and electric capacity when this electric quantity change look-up table records different electric discharge C number size, but, in the time not existing corresponding electric discharge C to count the corresponding relation of size in this electric quantity change look-up table, can do weighting processing according to the electric discharge C number of front and back in electric quantity change look-up table, for instance, suppose that the dynamic internal resistance index of the battery calculating is for " 65 " (as: the e point that " Fig. 4 " illustrates), in the time that the electric discharge C number size detecting is 1.2C, because the corresponding relation of the dynamic internal resistance index of battery and electric capacity while there is not 1.2C in electric quantity change look-up table, so can calculate the distance of 1.2C and front and back electric discharge C number, namely dynamic battery internal resistance index " 65 " is corresponded to the f point of 1C and correspond to the f ' point of 1.5C, and find out respectively corresponding discharge capacity g point and g ' point.
Then,, as " Fig. 5 " illustrates, the distance that 1.2C discharge capacity i point and 1C discharge capacity g are ordered is 0.2; The distance of 1.2C discharge capacity i point and 1.5C discharge capacity g ' point is 0.3, both ratio is 2:3, so its volume percent is " (capacity of searching when the dynamic internal resistance index of capacity+2* battery " 65 " of searching when the dynamic internal resistance index of 3* battery " 65 " and 1C electric discharge and 1.5C electric discharge)/(2+3) ", corresponding volume percent h point while trying to achieve the dynamic internal resistance index of battery " 65 " and 1.2C electric discharge, this number percent is the component (being the component of the dynamic internal resistance electric weight of battery) of vertical direction.
Refer to " Fig. 6 ", " Fig. 6 " defines the schematic diagram of the number percent of battery remaining electric weight for applying the present invention.Wherein, transverse axis is counted the electric weight number percent corresponding to for battery coulomb, the electric weight number percent that the longitudinal axis corresponds to for the dynamic internal resistance index of battery, in " Fig. 6 ", according to the specified maximum of battery can discharge current and electric capacity between relation, find out k point coordinates (γ, 100) (because coulomb counting method can produce between heat and actual consumption energy error to some extent because of battery, so in fact parallel direction cannot reach the position of " 100 ", the dynamic internal resistance index of battery is utilized voltage difference, arrive the position that reference voltage deducts minimum cut-off voltage so be bound to, so vertical direction can reach the position of " 100 "), and utilize k point coordinates to carry out projection to track straight line L line, with
?
orthogonal projection
for example, its computing formula is as follows:
And obtain q point coordinates (λ, μ).Q point (λ, μ) and initial point o (0,0) are formed
section is divided into n decile, and (n is positive integer, can carry out cutting according to the degree of accuracy of actual demand and requirement), taking " Fig. 6 " as example, n is numerical value " 100 ", i.e. " 100 " decile, namely residual estimation represents 100%～0%, and trueness error is 1%, and what each decile was represented is exactly the represented numerical value of battery remaining electric weight.
Refer to " Fig. 7 ", " Fig. 7 " calculates the schematic diagram of battery remaining electric weight number percent for applying the present invention.Suppose to try to achieve at time t the electric weight number percent that the dynamic internal resistance index of battery calculates
(being the component of the dynamic internal resistance electric weight of battery) and the electric weight number percent that utilizes coulomb counting method to calculate
(being the component of battery coulomb counting electric weight), according to these two vectors that component is made
track straight line k line is carried out to projection can be obtained
then can the capacity of display with battery maximum
point is compared, and the calculating formula of the number percent of its battery remaining electric weight is as follows:
The residual electric weight number percent of electric weight can obtain time t by above-mentioned calculating formula time.Thus, can be different from the past the wherein mode of an axle of only calculating, and the longitudinal axis (vertical direction) and transverse axis (horizontal direction) be revised simultaneously and obtained actual available battery remaining electric weight.
In sum, difference between known the present invention and prior art is by the voltage of sensing battery, electric current and temperature are as sensor parameter, and according to the component of default electrical specification parameter and the dynamic internal resistance electric weight of electric quantity change look-up table collocation sensor parameter calculating battery, and according to the component of sensor parameter and coulomb counting method calculating battery coulomb counting electric weight, then again the component of the component of dynamic battery internal resistance electric weight and battery coulomb counting electric weight is added synthetic to calculate the actual available residual electric weight of battery, can solve the existing problem of prior art by this technological means, and then reach technology effect of the estimation accuracy that improves battery remaining electric weight.
Although the present invention provides as above with aforesaid embodiment; so it is not in order to limit the present invention; any those skilled in the art; without departing from the spirit and scope of the present invention; when doing a little change and retouching, therefore scope of patent protection of the present invention must be as the criterion depending on this instructions appending claims person of defining.
Claims (10)
1. be added a synthetic battery remaining electric weight estimating system with two orthogonal components, it is characterized in that, this system comprises:
One storage module, in order to store in advance one group of electrical specification parameter and an electric quantity change look-up table;
One sensing module, in order to voltage, electric current and the temperature of sensing battery to produce a sensor parameter;
One computing module, in order to continue going out the dynamic internal resistance index of battery according to this sensor parameter and this group electrical specification calculation of parameter, and continue to search this electric quantity change look-up table to generate the component of the dynamic internal resistance electric weight of a battery according to the dynamic internal resistance index of battery calculating;
One integration module, in order to generate the component of a battery coulomb counting electric weight with coulomb counting method according to this sensor parameter; And
One estimating module, in order to be added synthetic to calculate the residual electric weight of battery by the component of the component of dynamic this battery internal resistance electric weight and this battery coulomb counting electric weight.
2. be as claimed in claim 1ly added synthetic battery remaining electric weight estimating system with two orthogonal components, it is characterized in that, this storage module more comprises and stores one coulomb of counting corrected parameter and a temperature variation look-up table.
3. be as claimed in claim 2ly added synthetic battery remaining electric weight estimating system with two orthogonal components, it is characterized in that, this system more comprises a counting module, recycle number of times using as a cell degradation parameter in order to record, and by this computing module and this integration module with the component of this cell degradation parameter and the dynamic internal resistance electric weight of this this battery of temperature variation look-up table correction and the component of this battery coulomb counting electric weight of this coulomb of counting corrected parameter correction of arranging in pairs or groups simultaneously.
4. be as claimed in claim 2ly added synthetic battery remaining electric weight estimating system with two orthogonal components, it is characterized in that, when this temperature variation look-up table is included in different battery temperature, the weighted value of the dynamic internal resistance index of battery of different discharge current sizes.
5. be as claimed in claim 1ly added synthetic battery remaining electric weight estimating system with two orthogonal components, it is characterized in that the dynamic internal resistance index of this battery that this electric quantity change look-up table comprises at least one discharge current size and the corresponding relation of electric capacity.
6. be added a synthetic battery remaining electric weight estimating and measuring method with two orthogonal components, it is characterized in that, step comprises:
Store in advance one group of electrical specification parameter and an electric quantity change look-up table;
Voltage, electric current and the temperature of sensing battery is to produce a sensor parameter;
Continue to go out the dynamic internal resistance index of battery according to this sensor parameter and this group electrical specification calculation of parameter, and continue to search this electric quantity change look-up table to generate the component of the dynamic internal resistance electric weight of a battery according to the dynamic internal resistance index of battery calculating;
Generate the component of a battery coulomb counting electric weight with coulomb counting method according to this sensor parameter; And
The component of the component of dynamic this battery internal resistance electric weight and this battery coulomb counting electric weight is added synthetic to calculate the residual electric weight of battery.
7. be as claimed in claim 6ly added synthetic battery remaining electric weight estimating and measuring method with two orthogonal components, it is characterized in that, the method more comprises and stores in advance one coulomb of counting corrected parameter and a temperature variation look-up table.
8. be as claimed in claim 7ly added synthetic battery remaining electric weight estimating and measuring method with two orthogonal components, it is characterized in that, the method more comprises record and recycles number of times using as a cell degradation parameter, and with the step of the component of this cell degradation parameter and the dynamic internal resistance electric weight of this this battery of temperature variation look-up table correction and the component of this battery coulomb counting electric weight of this coulomb of counting corrected parameter correction of arranging in pairs or groups simultaneously.
9. be as claimed in claim 7ly added synthetic battery remaining electric weight estimating and measuring method with two orthogonal components, it is characterized in that, when this temperature variation look-up table is included in different battery temperature, the weighted value of the dynamic internal resistance index of battery of different discharge current sizes.
10. be as claimed in claim 6ly added synthetic battery remaining electric weight estimating and measuring method with two orthogonal components, it is characterized in that the dynamic internal resistance index of this battery that this electric quantity change look-up table comprises at least one discharge current size and the corresponding relation of electric capacity.
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| CN106603874B (en) * | 2017-02-27 | 2019-03-05 | 维沃移动通信有限公司 | A kind of method that mobile terminal electricity is shown and mobile terminal |
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| CN110068765B (en) * | 2018-01-19 | 2021-06-15 | 新盛力科技股份有限公司 | Method for estimating battery capacity |
| CN108896917A (en) * | 2018-06-18 | 2018-11-27 | 广州邦禾检测技术有限公司 | A kind of internal cell resistance detection system and method based on the weighted compensation degree factor |
| CN110687468A (en) * | 2018-06-19 | 2020-01-14 | 华为技术有限公司 | Method and device for estimating state of charge of battery |
| CN110687468B (en) * | 2018-06-19 | 2021-01-15 | 华为技术有限公司 | Method and device for estimating state of charge of battery |
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