CN1266991A - Battery package, method for counting of charging/discharging and providing with residual electricity quantity of battery package - Google Patents
Battery package, method for counting of charging/discharging and providing with residual electricity quantity of battery package Download PDFInfo
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- CN1266991A CN1266991A CN00107025A CN00107025A CN1266991A CN 1266991 A CN1266991 A CN 1266991A CN 00107025 A CN00107025 A CN 00107025A CN 00107025 A CN00107025 A CN 00107025A CN 1266991 A CN1266991 A CN 1266991A
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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
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- Y02E60/10—Energy storage using batteries
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Abstract
The system has a heater core (14) for heating a passenger compartment, a burner (15) for burning fuel to heat a fluid that circulates through the heater core and a heat transport arrangement (18-20) between the burner and the induction side (2) of the engine to transport the heat of a high temperature combustion gas from the burner to the induction side during an engine starting process. The high temperature combustion gas is fed to the induction side before or during the heat exchange with the fluid for the heater core.
Description
The present invention relates to a kind of battery component, a kind of method that is used to count the charge/discharge number of times and a kind of method that is used to be provided with the dump energy of battery component.
Up to the present, provide a kind of battery component, for example lithium ion battery, NiCd battery or Ni-MH battery with battery unit (battery cell) as secondary cell.
This battery component generally includes: a microcomputer, be used to carry out battery unit remaining battery power calculating or communicate with an electronic installation that has as the battery unit of power supply; The peripherals of microcomputer; With a battery unit state detection circuit essential in the calculating of carrying out remaining battery power.
The cycle times of the charge/discharge of battery component is limited.On the other hand, according to kind of battery unit etc., the actual maximum times that can keep the charge/discharge cycle of acceptable charge is limited to a certain scope.
In traditional battery component, for the user, the maximum times that identification can be kept the charge/discharge cycle of acceptable charge practically is difficult, and be difficult the serviceable life of just discerning battery unit.Along with charge/discharge is repeated to carry out,, even this battery unit be charged to its whole electric weight can only identify battery electric quantity at faster speed be reduced near finishing the serviceable life that the user is merely able to discern this battery unit.
In order to allow the user easily discern the serviceable life of battery unit, the applicant has advised a kind of battery component and a kind of method that is used to show battery status in the flat 9-243718 of Japanese patent application publication No., be called first known technology below.
The voltage that detects battery unit at first known technology shown in Fig. 1 has surpassed first threshold voltage, and it is lower to detect one second threshold voltage of this voltage ratio.The number of times of this first known technology counting charge/discharge appears when supposing to detect state in the voltage status after detecting another voltage status under the situation in a charge or discharge cycle.
On the other hand, in having the battery component of a plurality of battery units, a battery unit is different with the maximum charging voltage of another battery unit.Therefore, the applicant has advised a kind of method for charging batteries and device and a battery component in the flat 9-285026 of Japanese patent application publication No., be called second known technology below.
In second known technology, calculate remaining battery power according to the charging of battery unit and the initial value of in battery unit, storing.
Battery component is loaded on the electronic installation, and camera system for example is so that provide electric current for this electronic installation.If this power supply exhausts, battery component is recharged so.This battery component has: a battery unit, and the secondary cell that can discharge chargeable as; With a microcomputer, be used to detect the voltage of this battery unit so that calculate remaining battery power.
Because remaining battery power perceptible variation along with temperature has, thus utilize a coefficient to calculate remaining battery power with the temperature correlation of battery unit, for example described in the flat 9-297166 of Japanese patent application publication No..The dump energy correction coefficient of this and temperature correlation is called as correction factor below.Because along with varying in size of the different correction coefficient of temperature, so the correction coefficient of each 10 ℃ of increment is stored in the non-volatile storer ROM (ROM (read-only memory)) for example.The microcomputer utilization is stored in this non-volatile storer and the correction coefficient corresponding with Current Temperatures calculated remaining battery power.
Yet, in first known technology, have only the voltage when battery unit to drop to when being lower than second threshold value, increase progressively counting, like this, battery unit is charged before being lower than second threshold value, do not increase progressively counting so if drop at the voltage of battery unit.Therefore, produced such problem: even because charge/discharge causes battery unit by deterioration, but correspondingly not to this cycle count.Although can attempt second threshold value is set to a higher value, just count yet will appear at also to remain when enough battery electric powers are arranged, so that can not correctly increase progressively counting.
On the other hand, traditional battery component is designed in this wise, so that in case be charged to 90%, this 90% charging just is considered to be full of electricity, so that be absorbed in the charging error in current detecting etc.Therefore in this battery component, integration (integrated) value of the remaining battery power when 90% charging is stored among the ROM in advance, and if confirm to be charged to 90%, this battery electric quantity is set to the remaining battery power value of integration so.
Yet if charge/discharge is repeated to carry out, cell performance deterioration so is so that the battery electric quantity that can actually be removed is reduced.Because the performance degradation of battery unit, the integration remaining battery power when 90% charging is lowered, and therefore produces a difference between the integration remaining battery power of integration remaining battery power of storing and reality when 90% charging in nonvolatile memory.
If calculate remaining battery power according to the initial value that when charging, is stored in the battery unit, can have the problem that correctly to calculate remaining battery power according to second known technology so.
Therefore an object of the present invention is to provide a kind of battery component, if wherein because charge/discharge makes the cell performance deterioration, count the number of times of charge/discharge cycle so according to this deterioration, and remaining battery power can accurately be set according to this deterioration.
Another object of the present invention provides and a kind ofly is used for counting in the number of times of battery component charge/discharge and a kind of method that is used to be provided with the remaining battery power of battery component.
According to an aspect of the present invention, the invention provides a battery component, this battery component comprises voltage check device, is used to detect the voltage of a battery unit; Memory storage is used to store a correction coefficient so that for a temperature computation remaining battery power that sets in advance; Temperature-detecting device is used to detect the temperature of battery unit; And calculation element.Calculation element is worked in this wise, if make a correction coefficient with the temperature correlation that is detected by temperature-detecting device be stored in the memory storage, calculation element is read this correction coefficient so that calculate remaining battery power according to this correction coefficient with by the voltage of voltage check device detection so.Calculation element also carries out such work, if make a correction coefficient not be stored in the memory storage with the temperature correlation that detects by temperature-detecting device, calculation element is read one with before detected temperatures and the correction coefficient of a temperature correlation that sets in advance afterwards from this memory storage, so that calculate a correction coefficient with the temperature correlation that detects according to each correction coefficient of reading, calculate remaining battery power according to the correction coefficient of calculating with by the detected voltage of voltage check device thus.
According to another aspect, the invention provides a kind of method, this method be used to calculate one with a remaining battery power that sets in advance the battery component of temperature correlation, this method comprises: store a correction coefficient, be used to calculate the remaining battery power that sets in advance temperature with respect to; With the temperature that detects this battery unit, wherein, if the correction coefficient with the temperature correlation that is detected by temperature-detecting device is stored in the memory storage, correction coefficient is read out and calculates remaining battery power according to this correction coefficient with by the voltage that voltage check device detects so.Equally, if a correction coefficient relevant with detected temperatures is not stored in the memory storage, from this memory storage, read one so with before detected temperatures and the correction coefficient of a temperature correlation that sets in advance afterwards, so that calculate a correction coefficient with the temperature correlation that detects according to each correction coefficient of reading, calculate remaining battery power according to the correction coefficient of calculating with by the detected voltage of voltage check device thus.
Fig. 1 shows the mode of count cycle number in correlation technique.
Fig. 2 is the curve map that the linear characteristic of the remaining battery power of expression integration under the situation of cell performance deterioration changes.
Fig. 3 shows the state that loads according to a battery component of the present invention on a camera system.
Fig. 4 is the skeleton view of a battery component.
Fig. 5 is a skeleton view of the rear side of expression battery component.
Fig. 6 is arranged on a skeleton view of the battery load units in the camera system.
Fig. 7 shows the circuit structure of this battery component.
Fig. 8 shows the relation between voltage level and the battery level.
Fig. 9 is a process flow diagram that is used to illustrate the content of operation of battery level setting and cycle count.
Figure 10 shows the calculating of periodicity.
Figure 11 shows an example with respect to the integration remaining battery power variation of this periodicity.
Figure 12 shows the another one example with respect to the integration remaining battery power variation of this periodicity.
Figure 13 shows the circuit structure of a battery component.
Figure 14 is one and is used for illustrating the process flow diagram in the main routine of calculation correction coefficient.
Figure 15 is one and is used for illustrating the process flow diagram in the subroutine of calculation correction coefficient.
Figure 16 shows the result of calculation of correction coefficient.
Figure 17 shows in a ROM store status for the correction coefficient of per 2.5 ℃ increment.
Figure 18 shows the step-length width of correction coefficient in correlation technique.
Explain according to a preferred embodiment of the invention with reference to the accompanying drawings.
The present invention is applicable to example battery component 1 as shown in FIG. 3.This battery component 1 for example is loaded in the battery load units 3 of a camera system 2, so that power supply is provided for this camera system 2.On the other hand, this battery component 1 can be loaded in a charging device (not shown) that is used to charge.
The shell 19 of battery component 1 for example is made of a kind of synthetic resin material.Formed guide channel 26,26 on two widthwise edges of the Width of this shell 19, this guide channel is used for the loading with respect to battery load units 3 guiding battery components.On the end in the lower surface 24 of guide channel 26,26 at shell 19 in the transverse sides separately is opening, and is formed side by side along the length direction of shell 19.
Be provided with one first input/output terminal 21 and one second input/output terminal 22 along two transverse sides with respect to the Width of the shell 19 on the front surface 20 of the loading direction of battery load units 3.A center section along Width is provided with a communication terminal 23.
First and second input/ output terminals 21,22 provide power supply for a main part of camera system 1 by battery load units 3.Communication terminal 23 is given the main part output information signal of camera system 1, for example signal as the dump energy of battery unit.Input/output terminal 21, an end of 22 and be positioned in the groove that is essentially rectangle towards outer communication ends 23, this groove forms in the front surface 20 of shell 19, thereby prevents owing to the other parts with battery loading attachment except link touch the breaking-up that causes.
In the front surface side of the lower surface 24 of shell 19, just in front surface alongst, form pair of control groove 28,29. Control groove 28,29 is configured symmetrically with respect to a center line (not shown) line on Width, as shown in FIG. 3.When loading, control groove 28,29 is engaged by the control male member (not shown) of battery load units 3, so that be limited on the Width of lower surface 24 of shell 19 to tilt with respect to battery load units 3.
Each control groove 28,29 is a L shaped shape basically, and this shape is made up of a first and the second portion perpendicular to this first perpendicular to the lower surface 24 of shell 19, as shown in FIG. 5.
Center section in the lower surface 24 of shell 19 forms an identification groove 30 that is essentially rectangle, and whether be used to discern this battery load units is a suitable element.
Form one first guide channel 34 near communication ends 23, this guide channel 34 extends abreast with shell 19 longitudinal directions.One end of first guide channel 34 is in front surface 20 upper sheds of shell 19, and its other end forms and extends to identification groove 30.Form a step 35 near front surface 20 places of shell 19 in first guide channel 34, this step 35 has the different degree of depth on corresponding to the depth direction perpendicular to the direction of the lower surface 24 of shell 19.This first guide channel 34 is with respect to the loading direction of battery load units 3 guiding battery components.
Form one second guide channel 36 in the face of first guide channel 34 in the lower surface 24 of shell 19, communication ends 23 is between first guide channel 34 and second guide channel 36.Second guide channel 36 is formed abreast with the longitudinal direction of the lower surface 24 of shell 19, makes that second guide channel 36 has an openend in the front surface 20 of shell 19.
In the lower surface 24 of shell 19, form one first latch recess 38 and one second latch recess 39, when battery component being loaded on the battery load units 3, mesh first latch recess 38 and second latch recess 39 by battery load units 3.First latch recess 38 is a rectangle in shape basically, and is positioned on the center line of Width of shell 19 near identification groove 30.Second latch recess 39 is rectangle in shape basically, and bigger a little than first latch recess 38 dimensionally.Second latch recess 39 is formed near the rear side of looking along the loading direction on the center line of the Width of shell 19.
On the other hand, the battery load units 3 that is provided with on camera system 2 is more a little bigger a little than the lower surface 24 of shell 19 dimensionally.Battery load units 3 its two transverse sides in the face of the Width of battery component 1 are provided with the guiding male member 47 that guide channel 26,26 a pair of and battery component 1 meshes.
When loading battery component on battery load units 3, guiding male member 47 is inserted in the guide channel 26,26 of shell 19, so that the guiding direction of insertion, the lower surface and the locating surface 45 of the shell 19 of maintenance battery component 1 are substantially parallel.
Constitute a termination portion 44 in side towards supporting (abutting) surface 46 of the battery load units 3 of the front surface 20 of battery component 1.This termination portion 44 is made of 51 to 53 and covers 60 of first to the 3rd splicing ear.
First and second splicing ears 51,52 are being set up on the both sides of the Width of battery load units 3, so that connect with first and second input/ output terminals 21,22 respectively.The 3rd splicing ear 53 is located on the mid point on the Width of battery load units 3, so that be connected with the communication ends 23 of battery component 1.First to the 3rd jointing 51 to 53 with the area supported 46 of the lower surface 24 of the battery component 1 battery load units 3 parallel with the longitudinal direction of battery component 1 on be provided with.
Cover 60 is installed on the battery load units 3, so that by arrow a1, rotate on the direction that a2 represents, prevents that thus first to the 3rd splicing ear 51 to 53 is subjected to outside destruction.
Cover 60 for example is made of a kind of synthetic resin material, and by one basic for rectangle guard block 61 and be used for that the support unit 62 of supporting and protecting parts 61 forms.Be formed with the surface that tilts with respect to Width towards the surface of the guard block 61 of the cover 60 of the locating surface 45 of battery load units 3.When battery component 1 was loaded on the battery load units 3, shell 19 was being pressed guard block 61 so that allow cover 60 rotation easily on the direction of being represented by arrow a2.Utilize the area supported 46 of battery load units 3 to support the support unit 62,62 of cover 60, so that rotate around a pivot (not shown).On the neighboring of the pivot of cover 60, a volute spring (not shown) is set.This volute spring one end is kept by the area supported 46 of battery load units 3, and its an other end is kept by the support unit 62 of cover 60.Therefore, mobile on the direction of representing by arrow a1 in the effect lower cover member 60 of helical spring elastic force, so that cover first to the 3rd splicing ear 51 to 53.
Each control male member 65,66 is a L shaped shape basically, and this shape is made up of a first and the second portion perpendicular to first perpendicular to locating surface 45.The inclination of locating surface 45 on Width with respect to battery load units 3 of the lower surface 24 of control male member 65,66 limit battery assemblies 1.
Two transverse sides along the Width of battery load units 3 are done as a whole being formed with control dog 55,55, wherein control dog 55,55 and engage with control flume 37,37.Control dog 55,55 is parallel with the longitudinal direction of locating surface 45 and battery component 1.
Be formed with an identification male member 56 on the center section of the locating surface 45 of battery load units 3, this identification male member 56 engages with the identification groove 30 of first battery component 6.This identification male member 56 is rectangle in shape basically.The end and an identification projection (lug) 57 of identification male member 56 are formed together, and this identification projection 57 engages with the identification slot 32 of battery component 1.Identification male member 56 has the width W parallel with the width of locating surface 45
1, this width W
1Less than the width W o of the identification groove 30 of battery component 1,, as shown in fig. 6 so that identification male member 56 can be inserted in the identification groove 30.Identification male member 56 is being formed on the position of L1 from a distance in vertical direction with area supported 46.
According to the structure of above-described battery load units 3, battery component 1 can be loaded on the battery load units 3.
Be used for the charging device of battery component 1 charging also is provided with the battery load units that structure is similar to battery load units 3.
The circuit structure of battery component 1 below is described.
With reference to Fig. 7, battery component 1 is provided with the lithium ion battery 171,172 as two battery units that are connected in series; One first I/O end 121, this first I/O end 121 is connected with the anode of lithium ion battery 171 by a resistor R 101; With one second input/output terminal 122, this second input/output terminal 122 is connected with the negative electrode of lithium ion battery 172.
Lithium ion battery 171,172 passes through first and second input/output terminals 121,122 by external charging or to external discharge.Lithium ion battery 171,172 is connected in parallel with the resistor 101,102 that is connected in series.Just, the positive electrode of lithium ion battery 171 is connected with resistor R 101, and the negative electrode of lithium ion battery 172 is connected with resistor 102 simultaneously.
Current detection circuit 173 detects the electric current that flows through in the resistor 103 during charge or discharge, so that give an A/D converter 174 current delivery that detects.
A/D converter 174 from the current value digitizing of current detection circuit 173 so that digitized current delivery to CPU 175.A/D converter 174 is the magnitude of voltage digitizing of a link of resistor 101 and 102, this link is called as the mid point link below, R102/ (R101+R102) partial pressure value of lithium ion battery 171 that just is connected in series and 172 terminal voltage is so that pass to CPU 175 to digitized voltage.
CPU 175 is provided with a counter 175a who is used for the count cycle number.CPU 175 is divided into from battery level 0 to battery level 3 level Four level to the voltage level on the mid point link X, and the highest battery level is a battery level 3 and minimum battery level is a battery level 0.Battery level reduces one-level at every turn, and CPU 175 adds one by counter 175a counting.
Particularly, CPU 175 is provided with battery level so that the count cycle number according to process flow diagram shown in Figure 9.
When current detection circuit 173 detected charging current or discharge current, CPU 175 entered step ST1, so that obtain cell voltage by A/D converter 174 on mid point link X.CPU enters into step ST2 then.
On step ST2, whether CPU 175 detects output according to one of current detection circuit 173 and checks and charge or discharge.Carry out if CPU 175 confirms charging, CPU enters into step ST3.Carry out if CPU 175 confirms discharge, CPU enters into step ST9.
At step ST3, CPU 175 detects voltage level higher than battery level 3 whether on mid point link X.If testing result is YES, CPU 175 enters into step ST4, otherwise CPU175 enters step ST5.
At step ST4, CPU 175 supposition current voltage level are battery levels 3, so that this level is written among the RAM 176, to stop this program.
At step ST5, whether the voltage level that CPU 175 detects on mid point link X is higher than battery voltage 2.If testing result is YES, CPU 175 enters into step ST6, otherwise CPU 175 enters step ST7.
At step ST6, CPU 175 supposition current voltage level are battery levels 2, so that this level is written among the RAM 176, stop this program thus.
At step ST7, whether the voltage level that CPU 175 detects on mid point link X is higher than battery voltage 1.If testing result is YES, CPU 175 enters into step ST8, otherwise CPU 175 supposition battery voltage are battery levels 0, so that this level is written among the RAM 176, stop this program thus.
At step ST8, CPU 175 supposition current voltage level are that battery level 1 is to stop this program.
At step ST9, wherein when confirming that CPU 175 enters into this step ST9 when step ST2 discharge is being carried out, whether the voltage level of CPU 175 checks on mid point link X be lower than battery voltage 1, and just whether battery level is converted to 0 from 1.If testing result is YES, CPU 175 enters into step ST10, otherwise CPU 175 enters step ST11.
At step ST10, CPU 175 supposition current voltage level are battery levels 0, so that this level is written among the RAM 176.CPU enters into step ST15 then.
At step ST11, whether the voltage level of CPU 175 checks on mid point link X be less than battery voltage 2, and just whether battery level transfers to level 1 from level 2.If testing result is YES, CPU enters into step ST12, otherwise CPU enters into step ST13.
At step ST12, CPU 175 supposition current voltage level are battery levels 1, so that this level is written among the RAM 176.CPU enters into step ST15 then.
At step ST13, whether the voltage level of CPU 175 checks on mid point link X be less than battery voltage 3, and just whether battery level is converted to level 2 from level 3.If testing result is YES, CPU enters into ST14, otherwise CPU stops this program.
At step ST14, CPU 175 supposition current voltage level are battery levels 0, so that this level is written among the RAM 176.CPU enters into step ST15 then.
At step ST15, CPU 175 increases by 1/3 to the periodicity of counter 175a counting to stop this processing.
Just, CPU 175 detection voltage levels belong to the battery level of which level when charging and discharge, and count increase by 1/3 when each voltage level is lowered owing to discharge, and make that any value in three threshold values is exceeded.Therefore, if lithium rechargeable battery is recharged continually/discharges, can increase the periodicity of counting so in response to the state of the actual deterioration of lithium secondary battery.
From 3 being transformed into 2, being transformed into 1 and be transformed into 0 from 1 from 2, periodicity is incremented counting to battery level at every turn.If make battery level by charging is to occur discharge after 3 again, battery level is transformed into 2 and be transformed into 1 o'clock periodicity from 2 and be incremented counting from 3 at every turn so.If equal to produce charging again at 1 o'clock at battery level, so that battery level is transformed into 3, and then once produce discharge, periodicity was incremented counting when then the battery level number was successively decreased at every turn.Simultaneously, represent actual periodicity at 1/3 of the periodicity shown in Figure 10.
If the periodicity of the counter 175a of CPU 175 surpasses the maximum number of the charge/discharge counting of lithium ion battery 171,172, can think lithium ion battery 171,172 deterioration and finishing its serviceable life so.
Battery level is divided into level Four in the present embodiment.Periodicity can be incremented counting when perhaps, battery level can be divided into n (＞2) level and surpass a threshold value of being somebody's turn to do in (n-1) threshold value at every turn.
Equally, in the present embodiment along with voltage level is lowered, just be incremented at the interdischarge interval periodicity.Perhaps, along with voltage level is incremented, just periodicity can be counted between charge period.Can also be to be counted at two period numbers that charge and discharge.
The integration remaining power magnitude of voltage of storage in ROM 177 below is described.Be stored among the ROM177 being charged to the integration remaining power voltage [mAh] that can be discharged in 90% for each periodicity, 90% charging is called 90% integration surplus value below, as shown in Figure 11.At this moment, 90% integration surplus value is stored with the interval in 10 cycles, specifically be to be used for periodicity from 0 to 10, from 11 to 20, from 21 to 30 ... the interval.
For example, the 90% integration surplus value in from 11 to 20 cycles is deterioration electric weight that the 90% integration surplus value in from 0 to 10 cycle deducts the lithium ion battery 171,172 that is produced by 11 to 20 cycles.Similarly, the 90% integration surplus value in from 11 to 20 cycles is deterioration electric weight that the 90% integration surplus value in from 0 to 10 cycle deducts the lithium ion battery 171,172 that is produced by 21 to 30 cycles.
Therefore, if calculate remaining power value in discharge according to the initial value of integration remaining power value, battery component 1 can utilize 90% integration surplus value to calculate as the value of setting according to periodicity so.Just, since as 90% accumulative total surplus value of an initial value that is used to calculate the remaining power value can be set up with by lithium ion battery 171, so the degradation value unanimity that 172 charge/discharge causes is can be than calculating the remaining power value more accurately with traditional method.
90% accumulative total surplus value also can be stored among the ROM 177, as shown in Figure 12 in per 32 cycles.For example, if periodicity is not less than 0 and be not more than 32,90% accumulative total surplus value of so non-correction is stored as the reference electric weight, if periodicity is not less than 32 and be not more than 64, reference electric quantity is stored after deducting correction data (steady state value) so, if periodicity is not less than 64 and be not more than 96, reference electric quantity is stored after deducting the correction data of twice so, if periodicity is not less than 96 and be not more than 128, reference electric quantity is stored after deducting three times correction data so.Just, if the electric weight of deterioration is linear, 90% integration surplus value can be stored according to this algorithm so.
According to the present invention, utilize the number of times of the charge/discharge of above-described battery component and counting cell assembly, but wherein detect voltage by chargeable/discharge battery unit, a plurality of battery levels are set up and the number of times of the detection voltage that converts different voltage levels to are counted, even because charge/discharge makes battery unit that deterioration be arranged, according to the degradation of battery unit also computation period number correctly.
Utilization is according to battery component of the present invention and remaining battery power method to set up, but being full of wherein with respect to chargeable/discharge battery unit, being charged to an integration remaining battery power when setting in advance ratio is stored in the memory storage with the interval of a periodicity that sets in advance, the number of times that the counting battery unit is recharged/discharges, and counting corresponding to counter, for the periodicity that sets in advance, the integration remaining battery power of storing in memory storage is set to the remaining battery power when battery unit is full of electricity, be charged to corresponding to periodicity set in advance ratio the time integration remaining battery power value can be set up.Because it is consistent to make initial value in when charging be configured to the deterioration that causes with charge/discharge by battery unit like this, so can Billy calculate remaining battery power more accurately with traditional battery component.
Figure 13 shows a specific circuit structure of battery component 1.
Battery unit square 70 comprises that 71,72, two batteries 71,72 of lithium ion battery as two battery units are connected in series; With a temperature sensor 76, be used to detect the temperature of lithium ion battery 71,72.The positive electrode of lithium ion battery 71,72 is connected with a negative terminal 74 with an anode 73 respectively with negative electrode.The tie point of lithium ion battery 71,72 is connected with a midpoint potential end 75.Temperature sensor 76 detects the temperature of battery 71,72 so that testing result is sent to battery protecting circuit piece 80.
Battery protecting circuit piece 80 comprises: an end V who is connected with anode 73
HAn end V who is connected with negative terminal 74
SSAn end V who is connected with midpoint potential end 75
L Resistor R 1 is used for the voltage on each end is carried out dividing potential drop to R6; A resistor R S and one first switch S 1.
Terminal V
H, V
LBe connected to each other by the resistor R 1 to R3 that is connected in series.The all-in resistance of the resistor R 1 to R3 that is connected in series is resistance R b1, and for example this resistance R b1 can be 20M Ω.
Terminal V
L, V
SSBe connected to each other by the resistor R 4 to R6 that is connected in series.Terminal V
L, V
SSBe connected to each other by the resistor R S and first switch S 1 that is connected in series mutually.Simultaneously, the all-in resistance of the resistor R 4 to R6 that is connected in series is Rb2, and for example Rb2 can be 20M Ω.Just, the resistance value of resistor R b1 equals the resistance value of resistor R b2.The resistance value of resistor R S is 390K Ω, and this resistance value is much smaller than the total resistance value of resistor R b1 and Rb2.First switch S 1 normally disconnects, and only first switch S 1 is conducting during midpoint potential acknowledgement control signal TS is provided.
Battery protecting circuit piece 80 comprises: first and second Zener diodes 81,82 are used to produce a reference voltage; First to fourth comparer 83 to 86 is used to detect the potential difference (PD) between each resistor and overcharges or overdischarge so that detect; A charging control circuit 89 is used for turn-offing one the 3rd switch SW when overcharging
CWith a charge/discharge control circuit 90, be used for when overdischarge, disconnecting a second switch SW
D
The 3rd comparer 85 has an inverting input that is connected with the negative pole of second Zener diode 82, and the positive pole of Zener diode 82 and terminal V
SSConnect.The 3rd comparer 85 have one with resistor R 4 and R5 between the non-inverting input that is connected of tie point.The 3rd comparer 85 detects whether lithium ion battery 72 is in overcharge condition.Therefore, logical signal H of the 3rd comparer 85 outputs when the voltage Vb2 that detects lithium ion battery 72 surpasses 4.25V, and if voltage Vb2 less than 4.25V, logical signal L of the 3rd comparer 85 outputs.
The 4th comparer 86 has an inverting input that is connected with the negative pole of second Zener diode 82.The 4th comparer 86 have one with resistor R 5 and R6 between non-inverting input that is connected of tie point.The 4th comparer 86 detects whether lithium ion battery 72 is at over-discharge state.Particularly, if the voltage Vb2 of lithium ion battery 72 less than 2.45V, logical signal H of second comparer 86 output is if voltage Vb2 greater than 2.45V, exports a logical signal L.
One first or the door 87 get the first and the 3rd comparer 83,85 output logic and, so that the gained result is sent to charging control circuit 89.Get for one or 88 the second and the 4th comparer 84,86 output logic and, so that the gained result is sent to charge/discharge control circuit 90.
89 pairs the 3rd switch SW of charging control circuit
CControl, if by first or door 87 provide logical signal H or logical signal L, then disconnect or closed the 3rd switch SW
C90 couples of second switch SW of charge/discharge control circuit
DControl, if by second or door 88 provide logical signal H or logical signal L, then disconnect or closed second switch SW
D
It should be noted: the second and the 3rd switch SW
DAnd SW
CBe connected in series mutually.The second and the 3rd switch SW
D, SW
CIn a switch be connected with second input/output terminal 22, and another switch is by resistor R 7 and terminal V
SSConnect.
Charge/discharge current testing circuit 91 comprises that the resistor R 11 of first and second operational amplifiers 911,912 and similar ring spacer (Ring-like gasket) is to R16.
First operational amplifier 911 has one through resistor R 13 and terminal V
SSNon-inverting input that connects and one pass through resistor R 12 and R7 and terminal V
SSThe inverting input that connects.A resistor R 11 is connected between the inverting input and output terminal of first operational amplifier 911.When flow through one of resistor R 7, the first operational amplifiers 911 output and the resistor R 12 and the proportional voltage of resistance ratio of resistor R 11 of discharge current is given microcomputer 92 and one the 3rd or 913.Proportional voltage of resistance ratio with resistor R 15 and resistor R 14 of resistor R 7, the second operational amplifiers 912 outputs is given microcomputer 92 and one the 3rd or door 913 if charging current is flowed through.The 3rd or the door 913 fetch logic signals and, so that the gained result is offered microcomputer 92.Just, charge/discharge current testing circuit 91 detects the direction of current that flows through resistor R 7, so that whether detect charge/discharge carries out, if detecting charge or discharge carries out, charge/discharge current testing circuit 91 offers microcomputer 92 to testing result, also charging current value or discharge current value is offered microcomputer 92 simultaneously.
If detected charge/discharge by charge/discharge current testing circuit 91, if or on a communication interface 93, received data, microcomputer 92 is programmed and starts working so, otherwise enters dormant state.If do not have charge/discharge current to flow through within two seconds or three seconds after starting or do not have data communication, microcomputer 92 also is programmed into a dormant state.
As discussing about Figure 18, in ROM 94, not only stored correction coefficient, and stored a control program or a control program that is used to calculate remaining battery power that is used to improve correction coefficient with per 10 ℃ interval above-mentioned.
The correction coefficient of storing in ROM 94 with per 10 ℃ interval is five correction coefficient, promptly a correction coefficient 1 (=0.6), be used for 10 ℃ or lower temperature; Correction coefficient 2 (=0.8) is used for 10 ℃ to 20 ℃; Correction coefficient 3 (=1.0) is used for 20 ℃ to 30 ℃; Correction coefficient 4 (=1.2) is used for 30 ℃ to 40 ℃; With a correction coefficient 5 (=1.4), be used for 40 ℃ or higher temperature.
Carry out the program that process flow diagram as shown in Figure 14 begins from step ST101 in order to come more detailed calculation correction coefficient, microcomputer 92 according to these correction coefficient.At this, the correction coefficient that is used for 20 ℃ to 30 ℃ is used as an example, and four correction coefficient are calculated with per 10 ℃ interval.
At step ST101, the correction coefficient that microcomputer 92 is stored in ROM 94 is set to be used for 25.0 ℃ to 27.5 ℃ correction coefficient 3-3.Just, correction coefficient 3-3 is set to 1.0.Microcomputer 92 enters into step ST102 then.
At step ST102, calculate the correction coefficient 3-1 on 20.0 ℃ to 22.5 ℃ in the correction coefficient 2 and 3 of microcomputer 92 from be stored in ROM 94.Microcomputer 92 is transformed in the subroutine shown in Figure 15 and handles, so that calculate the intermediate value of two correction coefficient (step ST111).Especially, microcomputer 92 is calculated as the intermediate value of correction coefficient 2 and 3 to 0.9, so that correction coefficient 3-1 is set to 0.9.Microcomputer enters into step ST103 then.
At step ST103, the subroutine that microcomputer 92 is carried out at the step ST111 shown in Figure 15 is used for 22.5 ℃ to 25.0 ℃ correction coefficient 3-2 so that calculate from correction coefficient 3-1 to 3-3.Just, microcomputer 92 is set to correction coefficient 3-2 to the intermediate value 0.95 of correction coefficient 3-1 (=0.9) and correction coefficient 3-3 (=1.0).Microcomputer 92 enters to step ST104 then.
At step ST104, microcomputer 92 is carried out the subroutine of the step ST111 among Figure 15, so that calculate and be used for 30.0 ℃ to 32.5 ℃ correction coefficient 4-1 by being stored in correction coefficient 3 and 4 among the ROM 94.Just, microcomputer 92 is set to correction coefficient 4-1 to the intermediate value 1.1 of correction coefficient 3 and 4.Microcomputer 92 enters to step ST105 then.
At step ST105, microcomputer 92 is carried out the subroutine of the step ST111 among Figure 15, so that be used for 27.5 ℃ to 30.0 ℃ correction coefficient 3-4 by correction coefficient 3-3 and 4-1 calculating.Just, microcomputer 92 is set to correction coefficient 3-4 to the intermediate value 1.05 of correction coefficient 3-3 and 4-1.Microcomputer 92 stops this processing then.
According to above-mentioned processing, microcomputer 92 obtains: be used for 20.0 ℃ to 22.5 ℃ correction coefficient 3-1 (=0.90), be used for 22.5 ℃ to 25.0 ℃ correction coefficient 3-2 (=0.95), be used for 27.5 ℃ to 30.0 ℃ correction coefficient 3-3 and be used for 30.0 ℃ to 32.5 ℃ correction coefficient 4-1 (=1.1), as shown in Figure 16.
As shown in Figure 17, microcomputer 92 is carried out the similar processing of the temperature range except 20.0 ℃ to 30.0 ℃, so that with per 2.5 ℃ interval calculation correction coefficient.
Because microcomputer 92 can utilize these correction coefficient with small step length and width degree, so even lithium ion battery 71,72 experience temperature changes, according to terminal V
LOn voltage also can accurately calculate remaining battery power.
If when the processing carried out at the step ST101 shown in Figure 14 microcomputer 92 corresponding to the temperature that detects by temperature sensor 76 as calculated correction coefficient, microcomputer 92 can interrupt this processing so that utilize these correction coefficient to calculate remaining battery power so.
For example, if microcomputer 92 has detected 26 ℃ temperature, microcomputer 92 can obtain to be used for 25.0 ℃ to 27.5 ℃ correction coefficient 3-3 (=1.0) when the processing of having carried out step ST101 so.Therefore microcomputer 92 can stop this processing from step ST102, so that calculate remaining battery power.
Equally, if microcomputer 92 has detected 23 ℃, so microcomputer 92 can execution in step ST101 to the program of ST103, so that according to correction coefficient 3-2 and terminal V
LOn voltage accurately calculate the remaining battery power of lithium ion battery 71,72.
Simultaneously, utilize to disclose in Japanese Patent Laid that disclosed a kind of technology also can calculate this remaining battery power among the flat 9-297166, and be not subjected to any particular restriction.Yet using this technology must be to utilize the correction coefficient of temperature dependent or the voltage of lithium ion battery 71,72 to calculate remaining battery power.
Utilize battery component 1, wherein only need the minimum correction coefficient of storage in ROM 94, and if detect the temperature of lithium ion battery 71,72, so only detected temperature range is come the calculation correction coefficient, so can accurately calculate correction coefficient according to variation of temperature.
Equally,, to the program of step ST105, carry out repeatedly at step ST102 in the subroutine shown in Figure 15.Thereby, needn't carry out just calculating optimum correction coefficient easily of complicated processing.
In the present embodiment, illustrated that hypothesis is with per 10 ℃ interval storage correction coefficient, as shown in Figure 18.Yet correction coefficient can be stored with per 2.5 ℃ interval in advance, as shown in Figure 17.Equally in the present embodiment, illustrated that the scope of supposing 10 ℃ is divided into level Four, to use per 2.5 (10/4) ℃ interval calculation correction coefficient.Yet, also can separate temperature range so that calculation correction coefficient more accurately with thinner step-length.
Computing method according to battery component of the present invention and remaining battery power, if the correction coefficient with the temperature correlation that is detected by temperature-detecting device is stored in the memory storage, reads correction coefficient and calculate remaining battery power according to this correction coefficient with by the voltage that voltage check device detects so.If a correction coefficient relevant with detected temperatures is not stored in the memory storage, one with before detected temperatures and a correction coefficient that sets in advance temperature correlation afterwards from memory storage, be read out, so that calculate a correction coefficient with the temperature correlation that detects according to each correction coefficient of reading, calculate remaining battery power according to the correction coefficient of calculating with by the detected voltage of voltage check device thus.Therefore, if in battery unit, produce a temperature variation, can correctly obtain one and the corresponding to correction coefficient of this variation so, so that remaining battery power is accurately calculated.
Claims (12)
1. battery component comprises:
But it is chargeable/the discharge battery unit;
Voltage check device is used for detecting the voltage of described battery unit at charge/discharge; With
Counter is used for that a plurality of battery levels are set and is used to count the number of times that the voltage that is detected by described voltage check device at charge/discharge is converted into different battery levels.
2. according to the battery component of claim 1, also comprise:
Demo plant is used for verifying that stop the serviceable life of described battery unit when the number of times by described rolling counters forward has surpassed the maximum times of maximum charge/discharge counting.
3. according to the battery component of claim 1, the voltage that wherein said rolling counters forward is detected by described voltage check device is increased and is converted into the number of times of different battery levels, or counting detects the number of times that voltage was reduced and was converted into different battery levels by described voltage check device.
4. method that is used to count the charge/discharge number of times of battery component, this method comprises:
But detect the voltage of a chargeable/discharge battery unit;
A plurality of battery levels are set; With
The voltage transitions of count detection becomes the number of times of different battery level.
5. according to the method for claim 4, wherein when having surpassed the maximum times of maximum charge/discharge counting, the number of times of described counting verifies that stop the serviceable life of described battery unit.
6. according to the method for claim 4, wherein said number of times is the number of times that is increased and is converted into different battery levels by the voltage that described voltage check device detects, or detects the number of times that voltage was reduced and was converted into different battery levels by described voltage check device.
7. battery component comprises:
But it is chargeable/the discharge battery unit;
Memory storage is used for storing an integration remaining battery power for each periodicity that sets in advance when being charged to the ratio that sets in advance of electricity of being full of with respect to described battery unit;
Counter is used to count the number of times that described battery unit is recharged/discharges; With
Setting device is used for corresponding by the number of times of described rolling counters forward, the remaining battery power in the time of will being arranged in battery unit for the integration remaining battery power of a periodicity that sets in advance of storing being full of electricity in described memory storage.
8. method that is used to be provided with the remaining battery power of battery component, this method comprises:
But, when this battery unit has been charged to a ratio that sets in advance, the integration remaining battery power of the periodicity that sets in advance for each is stored in the memory storage when the electricity that is full of with respect to a chargeable/discharge battery unit;
Calculate the number of times that described battery unit is recharged/discharges;
Remaining battery power when will the integral battery electric weight corresponding with a cycle times that sets in advance of storing being arranged in battery unit being full of electricity in described memory storage, wherein said accumulative total remaining battery power value is with corresponding by the number of times of described rolling counters forward.
9. battery component comprises:
Voltage check device is used to detect the voltage of battery unit;
Memory storage is used to store correction coefficient so that calculate remaining battery power for a temperature that sets in advance;
Temperature-detecting device is used to detect the temperature of described battery unit; With
Calculation element;
Described calculation element is operated, if make a correction coefficient with the temperature correlation that is detected by described temperature-detecting device be stored in the described memory storage, so described calculation element is read described correction coefficient so that calculate remaining battery power according to described correction coefficient with by the voltage of described voltage check device detection; Described calculation element also carries out following operation, if make a correction coefficient not be stored in the described memory storage with the temperature correlation that detects by described temperature-detecting device, described calculation element is read one with before detected temperatures and the correction coefficient of the temperature correlation that sets in advance afterwards from described memory storage, so that calculate correction coefficient with the temperature correlation of this detection according to each correction coefficient of reading, calculate remaining battery power according to the correction coefficient of being calculated with by the detected voltage of described voltage check device thus.
10. according to the battery component of claim 9, also comprise:
Program storage device, store a program therein, be used to calculate the correction coefficient of giving between fixed temperature and another temperature at, this correction coefficient is from calculating with the correction coefficient of described given temperature correlation with a correction coefficient of described another temperature correlation;
Described calculation element is according to program stored in described program storage device, each correction coefficient that utilization is read from described memory storage is repeatedly carried out the operation of calculation correction coefficient, and for before the temperature that detects by described temperature-detecting device and a temperature afterwards, utilize correction coefficient of so calculating and the correction coefficient of having read to calculate a new correction coefficient further, so that calculate a correction coefficient relevant with this detected temperatures from this memory storage.
11. a method that is used to calculate with the remaining battery power of a battery component that sets in advance temperature correlation, this method comprises:
Store correction coefficient, be used to calculate remaining battery power for setting in advance temperature;
Detect the temperature of described battery unit;
Wherein, if the correction coefficient with the temperature correlation that is detected by temperature-detecting device is stored in the memory storage, so described correction coefficient is read out and calculates remaining battery power according to described correction coefficient with by the voltage that described voltage check device detects; If a correction coefficient relevant with the institute detected temperatures is not stored in the described memory storage, then from described memory storage, read with before detected temperatures and the correction coefficient of a temperature correlation that sets in advance afterwards, so that calculate the correction coefficient relevant, calculate remaining battery power according to the correction coefficient of being calculated with by the detected voltage of voltage check device thus with this detected temperatures according to each correction coefficient of reading.
12. the method according to claim 11 comprises:
Program of storage in program storage device, be used to calculate a correction coefficient of giving between fixed temperature and another temperature at, this correction coefficient is from calculating with the correction coefficient of described given temperature correlation with the correction coefficient of described another temperature correlation;
According to program stored in described program storage device, each correction coefficient that utilization is read from described memory storage is calculated a correction coefficient; With
For before the temperature that detects by described temperature-detecting device and a temperature afterwards, utilize correction coefficient of so calculating and the correction coefficient of having read to calculate a new correction coefficient further from this memory storage; And
The operation of repeatedly carrying out the operation of described calculation correction coefficient and calculating new correction coefficient is to calculate a correction coefficient relevant with this detected temperatures.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP05935899A JP4305995B2 (en) | 1999-03-05 | 1999-03-05 | Battery pack and battery remaining capacity calculation method |
| JP059358/1999 | 1999-03-05 | ||
| JP5925699 | 1999-03-05 | ||
| JP059256/1999 | 1999-03-05 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1266991A true CN1266991A (en) | 2000-09-20 |
| CN1144060C CN1144060C (en) | 2004-03-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001070258A Expired - Fee Related CN1144060C (en) | 1999-03-05 | 2000-03-05 | Battery package, method for counting of charging/discharging and providing with residual electricity quantity of battery package |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN1144060C (en) |
| HK (1) | HK1032822A1 (en) |
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| HK1032822A1 (en) | 2001-08-03 |
| CN1144060C (en) | 2004-03-31 |
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