CN1193214A - Charging method for secondary cell and charging device thereof - Google Patents
Charging method for secondary cell and charging device thereof Download PDFInfo
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Abstract
A secondary storage battery charge method which does not cause the temperature rising which brings damage to a secondary battery, can always charge properly and can charge and discharge repeatedly and a charge device are that corresponding charge current is supplied between a charged battery positive terminal and a charged battery negative terminal to ensure that the charge current has the maximum larger than the voltage of charged battery terminals, which can reduce the changeable direct current voltage as being sequence polar along with an external control signal; the inflexion at the battery voltage/time curve of a charged battery is detected, and the charge current is reduced by orderly controlling the forced direct current voltage according to the detection of the inflexion.
Description
The present invention relates to the new charging method of storage battery and be used for implementing the charging apparatus for secondary cell of such charging method.
In recent years, portable or portable various electric, electronic equipments class, for example portable phone had been popularized widely in numerous fields, information processors such as notebook-sized personal computer, hand-held terminal, TV camera, rechargeable power tool, small-sized sweeper, various carrying apparatuses etc.And be absolutely necessary as the battery of drive source.
As everyone knows, primary cell that only can discharge once and the secondary cell that can repeatedly charge and discharge are arranged in such battery.
With manganese cell and alkaline manganese battery is the widely used primary cell of representative, has realized standardization in the world, and has the advantage that can obtain easily.But owing to be running stores fully, so uneconomical.
Lead accumulator is the secondary cell that can repeatedly discharge and recharge, and begins to be used at aspects such as automobile engines very early, and through all improvement, its size and capacity etc. all obtain obvious improvement in permanent history.But, use dilute sulfuric acid big owing to lead accumulator weight made reasons such as electrolyte, is not suitable for for example carrying the power supply of using apparatus as small-sized mobile usefulness.
Though also adopted a part of this known in history lead accumulator is made small-sized small-sized sealing excide battery, the battery capacity of its per unit weight is little.Now, as small battery, what extensively adopt is nickel-cadmium (Ni-Cd) battery, nickel-hydrogen (NiMH) battery, lithium ion (Li) battery etc.
Wherein, the Ni-Cd battery occupies the share of overwhelming majority in just commercialization of nineteen sixties in market.Can list the following feature of Ni-Cd battery.(1) it is that hermetic type does not need to replenish liquid, and (2) are in light weight, and (3) can miniaturization, adopt and No. 1, No. 2, the identical shape of manganese dry cell of standard specifications such as No. 5 can direct replacement, (4) variation in voltage is few, can export big electric current, (5) are compared with the manganese dry cell of disposable battery, owing to can use repeatedly, so the cost that uses significantly reduces, or the like.
Though be small battery with numerous features, according to the standard charging condition that battery manufacturer is recommended, about 10～15 hours of the current charges of designated usefulness 0.1A magnitude.Clearly, Chang charging interval is inconvenient in practicality like this, thereby has weakened above-mentioned numerous feature.
Therefore, shorten the charging interval by the magnitude of charging current being brought up to 0.3A sometimes, perhaps charge with 30 minutes～1 hour time, but this only limits to the battery of particular design can be used as the battery that carries out special quick charge.Moreover, if shorten the charging interval, will rise very highly at charging battery temperature in latter stage, exist the danger that reduces battery life.
In addition, the so-called memory effect that available capacity descends gradually except residual capacity, takes place in this secondary cell sometimes during not exclusively charging repeatedly, become at last and can not use.Such battery is thrown away the waste that can cause resource easily, and then can quicken heavy metal pollution in the soil etc., this is that people are undesirable.
Charge when the electric weight in small battery is unspent next time, promptly carry out so-called boost charge, can make above-mentioned memory effect become remarkable.Carrying, before restarting to use, append charging for caution's sake or replenish charging with in the interior dress secondary cell of apparatus etc.Memory effect can take place in this case.
Usually, portable information processor or communicator class, for example hand-held terminal, the power supply of portable phone etc., if each all will observe the program of discharging fully earlier during before use to secondary cell charge, spended time very then, also very bothersome, so, in fact almost do not accomplish.
For example, before going out during, or when beginning to carry out boost charge after finishing using the same day, accomplish all to confirm the dump energy of secondary cell, or to discharge fully earlier be extremely difficult to the interior dress secondary cell charge of portable phone at every turn.Therefore, always under the condition that memory effect must take place, carry out boost charge.
In order to prevent this memory effect, can use the refresh charging method.So-called refresh charging method is exactly the standard charging of regularly carrying out repeatedly after battery discharges fully, and this is a kind of effective method.Fig. 7 represents the voltage-capacity characteristic of NiCd battery and NiMH battery.Solid line has represented to take place the situation of memory effect among the figure, and dotted line has represented to carry out the situation behind the refresh charging.
But, when carrying out such refresh charging, must be noted that and avoid over-discharge can.Therefore be bothersome and time-consuming equally.
The assembled battery that single battery is together in series or parallel particularly, in case arrive over-discharge state, the discharge condition of each battery just has nothing in common with each other.Elder generation's exhausted cell is filled the into electric charge of opposite polarity, and not resilient attitude becomes.Must give special consideration to this.
And, when refresh charging, just adopt more shallow discharge for fear of the problems referred to above.Owing to constitute the property difference of each battery of battery pack, discharge just is through with when a part of or most of battery also are not reproduced like this.So just can not get expected effect.
Adopt the charging modes of above-mentioned prior art, being difficult to accomplish is not neither excessively having not enough charged state complete charge process yet.Prior art can not be confirmed the charged state of small-sized secondary batteries from the outside.Therefore, be difficult to determine the necessary and moment that charging fully finishes.
The method of known decision secondary cell charge concluding time has following several: 1. charging interval setting means, 2. terminal voltage detection mode, 3. battery temperature detection mode, 4. the cell voltage rate of change is measured mode (also having several mode of ameliorating outside the basic mode).Below these modes are described respectively.
1. the charging interval setting means is an on-state of controlling charging circuit with timer, is the most easy mode.But, can not guarantee the charging, the undercharge that mostly occurs or the situation about overcharging that reach suitable so after certain charging interval, stop to charge because the dump energy of battery is not quite similar when beginning to charge.
2. the terminal voltage detection mode is, charges with certain charging current, when the terminal voltage of storage battery has reached certain the set voltage that is predetermined, just stops the mode of charging during promptly near the magnitude of voltage of the maximum voltage in charging latter stage.
But charging voltage in latter stage changes because of the temperature and the charging current of battery.For fear of overcharging, had to be provided with lowlyer be used for detecting the setting voltage that charges latter stage.Therefore, the terminal voltage that detects can not reflect real charged state, the situation of the undercharge that generally mostly occurs.
3. the battery temperature detection mode is like this work, comes monitoring battery temperature with the detector unit in the battery of packing in advance, both reduces charging current successively during fixed temperature when reaching some, finally stops charging.This mode detects is the reaction heat of gas that charging takes place latter stage generation when being absorbed by negative electrode.But it is subject to the influence of environment temperature, is prone to during low temperature to overcharge, and is prone to undercharge during high temperature.This mode is to detect the temperature that causes because of overcharging to rise in itself, and overcharge battery itself is not wished to occur.Therefore can not deny that the increase of charging times can cause the deterioration of battery.
4-1. terminal voltage rate of change (Δ V/dt) mensuration mode is work like this.As shown in Figure 4, finish, and when changing decline (Δ V/dt≤0) into,, promptly detect and become-complete charge during Δ V by the rate of change of detected slope in the rising of charging cell voltage in latter stage.This mode is to descend by the voltage that the rising that detects by battery temperature causes to stopping to charge in itself, so the temperature rising of battery must take place.In addition, have in the method and arrived set voltage and just stop situation of charging and the situation of proceeding faint charging (trickle charge) for hold mode fully.The state that the charging current curve representation of Fig. 4 (B) carries out trickle charge.
4-2. above-mentioned terminal voltage rate of change (Δ V/dt) mensuration mode is work like this.Shown in Fig. 5 (A), when having arrived the cell voltage that temperature begins to rise, detect the rate of change of voltage in charging latter stage, and shown in Fig. 5 (B), reduce charging current steppedly.In this case, need wait change setting voltage V according to kind, the size of battery
1, V
2, V
3Deng.
4-3. second kind of terminal voltage rate of change mensuration mode through improvement is work like this.Shown in the cell voltage curve of Fig. 6 (A), when the rate of change of the slope that detects the cell voltage rising, when promptly the Δ V/dt shown in figure (C) has arrived certain set value, like that electric current is controlled shown in Fig. 6 (B).But the so-called set value in this situation is the voltage of proceeding to charge by the variation that detects cell voltage in itself, so be necessary to come change setting according to the kind and the capacity of battery.
Make must be accompanied by temperature in this way and rise, on one side and the kind and the capacity of the object battery that needs to consider to charge set.So this mode is a trouble, and because of easy generation problems such as misoperations.
In above-mentioned existing various charging modes, then can not give full play to the performance of battery as undercharge takes place, thereby the performance of the apparatus of this battery is equipped with in influence.
On the contrary, overcharge in case have the secondary cell of airtight construction, it will cause temperature to rise, even cause the phenomenon of electrolyte leakage and its caused electrolyte deficiency, i.e. mummification phenomenon.This is to have suffered fatal infringement for secondary cell.
The purpose of this invention is to provide such charging method, it does not cause bringing the temperature of infringement to rise to secondary cell, can carry out suitable charging, and can discharge and recharge repeatedly and memory effect do not take place; And provide the charging device that is suitable for implementing such charging method.
The present invention adopts following charging method to realize above-mentioned purpose.This secondary battery charging method is like this work: be higher than the maximum that is recharged battery terminal voltage having, and be applied between the positive and negative terminal that is recharged battery and make its polarity identical with the polarity of battery according to variable DC voltage that can decreased voltage from the control signal of outside; Provide and the above-mentioned corresponding charging current of voltage that applies on one side, detect the flex point cell voltage time graph that be recharged battery on one side, and reduce charging current by controlling the above-mentioned direct voltage that applies successively according to the testing result of this flex point.
Fig. 1 is the general block diagram of the basic comprising of expression charging apparatus for secondary cell of the present invention.
Fig. 2 is the cell voltage of expression secondary battery charging method of the present invention and the key diagram of current waveform time variation.Figure (C) is local expanded view.
Fig. 3 is the block diagram of formation of the embodiment of expression charging apparatus for secondary cell of the present invention.
Fig. 4 is the key diagram that changes the cell voltage of the 1st kind of secondary battery charging method of expression prior art and current waveform time.
Fig. 5 is the key diagram that changes the cell voltage of the 2nd kind of secondary battery charging method of expression prior art and current waveform time.
Fig. 6 is the key diagram that changes the cell voltage of the 3rd kind of secondary battery charging method of expression prior art and current waveform time.Figure (C) is local expanded view.
When Fig. 7 represents to adopt prior art, when memory effect has taken place for NiCd battery and NiMH battery and voltage behind the refresh charging and capacity corresponding relation.
The present invention realizes above-mentioned purpose with charging apparatus for secondary cell 10. As shown in Figure 1, two Primary cell charging device 10 possesses the power unit 12 that produces DC voltage and is used for to being recharged electricity Apply voltage during pond 20 charging and accept from the voltage of this power unit 12 and according to from Outside control signal detects the electric power control section 14 of output voltage and duration, and prison Time depending on the above-mentioned cell voltage that is recharged battery 20 and charging current changes, and detects this electricity The flex point of cell voltage time graph also produces the supervision part 16 of output signal and accepts this prison Depending on the output signal of part 16 and drive the calculation drive part of above-mentioned electric power control section 14 18.
In secondary battery charging method of the present invention, be applied between the both positive and negative polarity of secondary cell DC voltage can be configured to continuous voltage or pulse voltage. During charging Monitoring the terminal voltage that is recharged battery always. Reference in advance when carrying out such supervision Be stored in monitor in the part 16 with the performance data that requires performance data to be consistent, for example battery Kind, terminal voltage and main points etc.
Adopt such charging current to monitor and just can determine the state that is recharged battery, particularly residual capacity.Monitor result's processings that perform calculations according to this, decide the voltage swing and the charging interval of the usefulness that continues to charge then according to its result.And the voltage application form is used in charging, both can be that interrupted (pulse type) also can be continuous variable voltage.
Shown in the cell voltage-time graph and its local expanded view (C) of Fig. 2 (A), detect cell voltage and arrived second-order differential (d at actual zero point
2V/dt
2=0), i.e. flex point or arrived actual flex point.And for example shown in the charging current curve of figure (B), resemble I
1, I
2, I
3, I
4Like that, be recharged each flex point of battery and reduce charging current along with arrival.
Like this,, proceed charging while change the voltage that applies according to set optimum value data, just can prevent overcharge, overheated and memory effect and realize desirable charging.
Be recharged battery and the sign that temperature sharply rises whether occurs, can utilize the voltage change ratio of above-mentioned charging voltage-time graph whether negative, promptly whether find by flex point from just becoming.As with the expression method of mathematics, such flex point promptly is that voltage is zero point to the second-order differential value of time on voltage curve.
That is, the state the when voltage-time curve that protrudes changes curve protruding upward into downwards, or the state of variation in contrast to this takes place.Electric current takes place sharply to change when promptly being conceived to cross such flex point, the situation that the occurrence temperature that accompanies therewith sharply rises.
In addition, the phenomenon of flex point appears on this charging voltage-time graph, hardly with the kind and the capacity generation difference of secondary cell.Therefore, adopt charging method of the present invention and be used for implementing the charging device of this method, can be safely and implement charging expeditiously.
Second-order differential value d by the change in voltage of looking over one's shoulder
2V/dt
2State, can easily detect the flex point in the terminal voltage-time graph that is recharged battery.In fact when the second-order differential value less than according to factor such as battery and fixed coefficient k (-1＜k＜1, and be flex point when strictly saying k=0 herein) thus the time just the state of this moment is considered as flex point and can controls.
By adding such consideration, just can realize high efficiency charging, excessive temperature does not take place in charging process yet to rise or memory effect.Therefore, extending battery life greatly, and can realize the resources effective utilization and suppress environmental pollution.
As the charge secondary cell of object of the present invention: nickel-cadmium cell is arranged, nickel-hydrogen cell, lead accumulator, nickel-zinc cell, silver oxide-zinc battery, silver oxide-cadmium cell and other various lithium secondary batteries etc.As mentioned above, charging method of the present invention and charging device are widely applicable for above-mentioned various secondary cell.
Below, with reference to the description of drawings embodiments of the invention.Fig. 3 is the block diagram of configuration example of the charging device 10 of the expression secondary cell that is suitable for implementing charging method of the present invention.For the component part identical, be marked with identical reference marks with Fig. 1.
In the fundamental of Fig. 1, the concrete formation of monitor portion 16 and calculation drive part 18 is shown in Fig. 3.Monitor portion 16 has the current detecting part 16A that current detection section 16V is used for detecting the terminal voltage that is recharged battery 20 and is used for detecting charging current.Result according to these two detections synthetically monitors battery 20 states such as charging capacity at that time that are recharged.
Have, monitor portion 16 has main memory part 16M and is used for memory for implementing the necessary data of a succession of charging operations again.The data that main memory part 16M is remembered being recharged battery 20 charging capacity at that time, and comprising charging current and reach temperature characterisitic etc. over time.
Be provided with the flex point test section for 16 li in monitoring unit.Can constitute the flex point test section with following part: detect the circuit 16d of voltage change ratio, temporary memory part 16T, rating unit 16C.By the voltage signal that current detection section detects at regular intervals, in voltage change ratio testing circuit 16d, just become the second-order differential value and detected.
The second-order differential value that detects so temporarily is stored in the temporary memory part 16T.Stored like this numerical value and next second-order differential value are sent to comparison circuit C successively and are compared, and a second-order differential value is to measure like this: in certain time interval, take a sample to magnitude of voltage for example per 15 seconds, thereby a plurality of magnitudes of voltage were asked the average second-order differential value that obtains continuously in 1～2 minute long time.As the change in voltage second-order differential value of terminal voltage-time graph (d during less than set coefficient k
2V/dt
2≤ k) corresponding output signal just takes place.Coefficient k in this situation is different because of the kind of secondary cell, capacity etc., but as mentioned above, be-1＜k＜1 herein, and the state of k=0 is the flex point of strictness.
Be used as the signal that flex point detects in monitor portion 16 and be input to the calculation drive part 18 that constitutes by microcomputer etc.After desirable calculation processing, be admitted to electric power control section 14 as drive signal.As a result, electric power control section 14 just will be supplied with it to being recharged battery 20 optimum voltages.And calculation drive part 18 has drive part 18D and calculation part 18T.
, be transformed into and have interrupted voltage or the continuous voltage that is higher than the peak value that is recharged cell voltage the VD of power unit 12 by the electric power control section controlled of calculation drive part 18.When dc voltage conversion is become interrupted voltage, the peak value of this direct voltage is at least is recharged more than 1.3 times of battery terminal voltage.Because to the cause of secondary cell implementation quick charge, this part thing is for removing or preventing that memory effect from being important.
But long-time continuous applies such high voltage and will become to the too harsh electric current of secondary cell supply.Owing to can cause the physical damage etc. of the overheated or generating electrodes of battery like this, must be noted that in the use.
Charging apparatus for secondary cell of the present invention can be by suitably easily constructing hardware and method that the combination of software that it is controlled is got up.And above-mentioned hardware is by at the known microcomputer of this technical field, memory, and the combination of register, transducer etc. constitutes.
The kind that is recharged battery that can charge with charging method of the present invention as mentioned above, has nickel-cadmium cell, nickel-hydrogen cell, lead accumulator, nickel-zinc cell, silver oxide-zinc battery, silver oxide-cadmium cell and other various lithium secondary batteries etc.
Secondary battery charging method of the present invention is conceived to that majority to above-mentioned battery charges act as this fact of the endothermic reaction; It is characterized in that allowing big electric current flow through at the initial stage that begins to charge, flex point to cell voltage-time graph detects, passed through just to control charging device to reduce charging current after this flex point, being implemented in secondary cell does not have charging under the condition that temperature rises.
Therefore, adopt the present invention just to make the short time charging become possibility, and because battery status obtain continuously monitoring that so can not take place that excessive temperature rises or situation such as overcharge, the result just can extend the life of a cell.
Adopt secondary battery charging method of the present invention, compare with above-mentioned prior art with about 1/3 charging interval and just can charge.Therefore, the charging of carrying with weapon exercises is also become favourable.
Have again, memory effect does not take place yet, in urgent, can for example charge in 5 minutes, also can append charging after coming to an end with number/one in above-mentioned 15～20 minutes charging interval owing to carry out so-called boost charge.
The scope of application of charging method of the present invention is not limited in the small-sized secondary cell that carries usefulness.Above-mentioned various secondary cell also can be fully to be applicable to the battery forklift truck, conveying arrangements such as Electric hand cart, the large-scale storage battery of used for electric vehicle power supply etc.For will take the purposes that a few hours charge obsolete the time at present at night etc., can charge with number/one time.Also be favourable aspect the saving energy like this.
Have, the greatest problem that still is at present the electric automobile of advanced development is not have the battery of small-sized light weight and can not grows distance travel because of battery capacity is limited and can not shorten the charging interval again, or the like.In the field of high capacity cells such as electric automobile, people wait in expectation use tara when content volume than aspect be better than the alkaline battery of excide battery.And charging method of the present invention is also providing useful technology to people aspect the charging technique of these battery varieties.Therefore, need the field of quick charge also to have potential possibility at automobile batteries charging station etc.
Adopt method of the present invention to extend the life of a cell significantly, promoted the resources effective utilization.Reducing the refuse battery quantity of refuse and preventing from also can contribute aspect the environmental disruption.
Claims (4)
1. secondary battery charging method, it is characterized in that: the charging current of correspondence is supplied to be recharged between the positive and negative terminal of battery, become along polarity so that have greater than the maximum that is recharged battery terminal voltage and the variable DC voltage that can reduce with the control signal of outside, be recharged the flex point on the cell voltage time graph of battery by detection, and control the above-mentioned direct voltage that applies successively according to the detection of this flex point and reduce charging current and charge.
2. the described secondary battery charging method of claim 1, the detection that it is characterized in that above-mentioned flex point are to be recharged the change in voltage second-order differential value on the cell voltage time graph of battery and the signal that takes place carries out according to supervision when this second-order differential value is negative from just becoming.
3. the charging device of a secondary cell, it is characterized in that: possess the power unit that direct voltage takes place, be used for applying voltage when being recharged battery charge giving, accept from the voltage of this power unit and according to the electric power control section that comes control output voltage and duration from the control signal of outside, the time that monitors above-mentioned cell voltage that is recharged battery and charging current changes and detects the flex point of this cell voltage time graph and the monitor portion of output signal takes place, with the output signal of accepting this monitor portion and drive the calculation drive part of above-mentioned electric power control section.
4. the charging device of the described secondary cell of claim 3, the flex point test section that it is characterized in that being arranged on above-mentioned monitor portion possess just to obtain at regular intervals and above-mentionedly are recharged the temporary transient memory circuit of the voltage change ratio that the circuit of the cell voltage rate of change of battery, temporary transient storage obtained just now and the storing value of this memory circuitry stores and the comparison circuit that compares successively through the next voltage change ratio that produces behind the certain hour; Some when successively the difference of voltage change ratio is born from just becoming these is judged as flex point, according to this judged result above-mentioned calculation drive part is controlled.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9067498A JPH10248175A (en) | 1997-03-06 | 1997-03-06 | Method and apparatus for charging secondary battery |
| JP67498/97 | 1997-03-06 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1193214A true CN1193214A (en) | 1998-09-16 |
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ID=13346721
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98106032A Pending CN1193214A (en) | 1997-03-06 | 1998-03-05 | Charging method for secondary cell and charging device thereof |
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| Country | Link |
|---|---|
| JP (1) | JPH10248175A (en) |
| CN (1) | CN1193214A (en) |
| TW (1) | TW370733B (en) |
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| US7923950B2 (en) | 2006-02-28 | 2011-04-12 | Toyota Jidosha Kabushiki Kaisha | Vehicle drive device and method of controlling vehicle drive device |
| CN104736981A (en) * | 2012-12-12 | 2015-06-24 | 富士电机株式会社 | Semiconductor chip temperature estimation device and overheat protection device |
| CN107332316A (en) * | 2017-08-23 | 2017-11-07 | 努比亚技术有限公司 | Staged charging method, mobile terminal and computer-readable recording medium |
| CN108828456A (en) * | 2018-07-11 | 2018-11-16 | 惠州志顺电子实业有限公司 | Full method, apparatus and the charger including the device are sentenced in nickel-metal hydride battery charging |
| CN110137584A (en) * | 2019-03-20 | 2019-08-16 | 北京车和家信息技术有限公司 | Charging voltage Threshold and charging strategy determine method |
| CN110808621A (en) * | 2019-10-29 | 2020-02-18 | 上海施能电器设备有限公司 | Over-current control method based on Wsa charging curve |
| CN110824365A (en) * | 2019-10-23 | 2020-02-21 | 上海施能电器设备有限公司 | Lead-acid storage battery sufficiency judgment method based on Wsa charging curve voltage change rate |
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| US7646171B2 (en) * | 2004-01-06 | 2010-01-12 | Sion Power Corporation | Methods of charging lithium sulfur cells |
| US10297827B2 (en) | 2004-01-06 | 2019-05-21 | Sion Power Corporation | Electrochemical cell, components thereof, and methods of making and using same |
| US8828610B2 (en) | 2004-01-06 | 2014-09-09 | Sion Power Corporation | Electrolytes for lithium sulfur cells |
| US7358012B2 (en) | 2004-01-06 | 2008-04-15 | Sion Power Corporation | Electrolytes for lithium sulfur cells |
| US20080191667A1 (en) * | 2007-02-12 | 2008-08-14 | Fyrestorm, Inc. | Method for charging a battery using a constant current adapted to provide a constant rate of change of open circuit battery voltage |
| CN103270624A (en) | 2010-08-24 | 2013-08-28 | 巴斯夫欧洲公司 | Electrolyte materials for use in electrochemical cells |
| US8735002B2 (en) | 2011-09-07 | 2014-05-27 | Sion Power Corporation | Lithium sulfur electrochemical cell including insoluble nitrogen-containing compound |
| US9577289B2 (en) | 2012-12-17 | 2017-02-21 | Sion Power Corporation | Lithium-ion electrochemical cell, components thereof, and methods of making and using same |
| JP2016201965A (en) * | 2015-04-14 | 2016-12-01 | 古河電気工業株式会社 | Power storage system and control method therefor |
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-
1997
- 1997-03-06 JP JP9067498A patent/JPH10248175A/en active Pending
-
1998
- 1998-02-20 TW TW087102425A patent/TW370733B/en active
- 1998-03-05 CN CN98106032A patent/CN1193214A/en active Pending
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| US7923950B2 (en) | 2006-02-28 | 2011-04-12 | Toyota Jidosha Kabushiki Kaisha | Vehicle drive device and method of controlling vehicle drive device |
| CN101395030B (en) * | 2006-02-28 | 2012-07-25 | 丰田自动车株式会社 | Vehicle drive device and method of controlling vehicle drive device |
| CN104736981A (en) * | 2012-12-12 | 2015-06-24 | 富士电机株式会社 | Semiconductor chip temperature estimation device and overheat protection device |
| CN107332316A (en) * | 2017-08-23 | 2017-11-07 | 努比亚技术有限公司 | Staged charging method, mobile terminal and computer-readable recording medium |
| CN108828456A (en) * | 2018-07-11 | 2018-11-16 | 惠州志顺电子实业有限公司 | Full method, apparatus and the charger including the device are sentenced in nickel-metal hydride battery charging |
| CN110137584A (en) * | 2019-03-20 | 2019-08-16 | 北京车和家信息技术有限公司 | Charging voltage Threshold and charging strategy determine method |
| CN110824365A (en) * | 2019-10-23 | 2020-02-21 | 上海施能电器设备有限公司 | Lead-acid storage battery sufficiency judgment method based on Wsa charging curve voltage change rate |
| CN110808621A (en) * | 2019-10-29 | 2020-02-18 | 上海施能电器设备有限公司 | Over-current control method based on Wsa charging curve |
| CN110808621B (en) * | 2019-10-29 | 2023-06-27 | 上海施能电器设备有限公司 | Overcurrent control method based on Wsa charging curve |
| CN112636406A (en) * | 2020-11-26 | 2021-04-09 | 西安讯服通科技有限公司 | Battery management method and device for uninterruptible power supply |
| CN112636406B (en) * | 2020-11-26 | 2023-04-07 | 西安讯服通科技有限公司 | Battery management method and device for uninterruptible power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10248175A (en) | 1998-09-14 |
| TW370733B (en) | 1999-09-21 |
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