CN203151137U - Cell charging device - Google Patents
Cell charging device Download PDFInfo
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- CN203151137U CN203151137U CN 201320043673 CN201320043673U CN203151137U CN 203151137 U CN203151137 U CN 203151137U CN 201320043673 CN201320043673 CN 201320043673 CN 201320043673 U CN201320043673 U CN 201320043673U CN 203151137 U CN203151137 U CN 203151137U
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- battery
- charging
- voltage
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- output control
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Abstract
The utility model provides a cell charging device comprising the following elements: a charging power source connected with a target cell and for charging the target cell; a voltage recording unit recording charge voltage of the charging power source to the target cell; a calculation processing unit obtaining reference voltage from charge voltage according to received obtain instructions and preset time intervals, and correcting a change rate curve of the reference voltage according to preset algorithm, thereby obtaining a correction curve and calculating gradient of the correction curve; a comparison unit comparing the gradient with a set value, and if the gradient is smaller than the set value, then indications are sent to an output control unit; and an output control unit reducing the charge voltage to a preset voltage value after indications are received. By employing the technical scheme, the voltage change rate can be corrected, so maloperations caused by misjudgement of the charge voltage change rate are prevented, and cell dehydration can be reduced and serve life is prolonged.
Description
Technical field
The utility model relates to the charger technical field, in particular to a kind of battery charger.
Background technology
Used in the market charger roughly can be divided into two big classes: common three stage chargers and the intelligent charger that has intelligent chip.Common three stage charger charge modes are simple, but it is big to cell damage, if increase the length of charger output line, can cause battery to fill insatiable hunger (such as charger is put at home during to battery charge, and the segment distance that its output line traction is long charges in electric motor car), existing market has been eliminated this charger basically.The function that intelligent charger can be realized is a lot, such as: positive pulse charging, negative pulse charging, positive negative pulse stuffing charging, negative slope charging etc.
Negative slope charger in the intelligent charger is by judging whether the slope that voltage rises is negative value, judges whether battery is full of, and then the mode that stops to charge.But because cell voltage has fluctuation in charging process, the simple voltage slope that adopts is as criterion, be easy to generate the erroneous judgement or can't in time judge, may cause battery to be overcharged, and existing market negative slope charger all adopts low current charge (2.5A is following), cause battery chronic at the charging high pressure section, increased the dehydration of battery, cause shorter battery life.
Particularly, the quick constant current charge method of negative voltage slope, charging process comprises quick crossing current charging and trickle charge, the moment that rechargeable battery overcharges, charging voltage can descend on the contrary, adopt the charger of negative voltage slope method will detect this faint voltage and descend, and at this test point with dump, avoid over-charging of battery.But adopt the control of negative voltage slope that quick charge is stopped, adopt hardware circuit to realize the detection of negative voltage slope, its flexibility is relatively poor, and it is frequent to detect misoperation.
Therefore, need a kind of new battery boosting technology, can be when adopting negative voltage slope method to be battery charge, avoid because misoperation is carried out in the erroneous judgement of charging voltage rate of change, and can reduce the battery dehydration, the useful life of prolongation battery.
The utility model content
The utility model just is being based on the problems referred to above, proposed a kind of battery boosting technology, can when adopting negative voltage slope method to be battery charge, avoid carrying out misoperation because of the erroneous judgement to the charging voltage rate of change, and can reduce the battery dehydration, prolong the useful life of battery.
In view of this, the utility model proposes a kind of battery charger, comprising: charge power supply, be connected to target battery by output control unit, be used to described target battery charging; The voltage record cell is connected to described charge power supply and calculation processing unit, is used for the described charge power supply of record to the charging voltage of described target battery; Described calculation processing unit, be connected to described voltage record cell and comparing unit, be used for according to the instruction of obtaining that receives, from described charging voltage, obtain reference voltage at interval according to Preset Time, and according to preset algorithm the change rate curve of described reference voltage is revised, obtain fair curve, and calculate the slope of described fair curve; Described comparing unit is connected to described calculation processing unit and described output control unit, is used for described slope and default value are compared, if described slope less than described default value, then sends first instruction to described output control unit; Described output control unit is used for when receiving described first instruction described charging voltage being down to the predeterminated voltage value.
In this technical scheme, can for battery charge the time, record charging voltage, and (sensitivity of judging over-charging of battery if desired is higher to obtain reference voltage according to the time interval that the user arranges from the charging voltage of record, can be set) the less time interval, revise by the change rate curve to reference voltage, can obtain the higher fair curve of smoothness (namely having ignored the fluctuation of charging voltage curve among a small circle), and fair curve rises with real charging voltage curve and downward trend is identical, therefore whether the slope that can pass through to judge fair curve judges whether battery be full of less than default value.And because the fair curve fluctuation is less, can determine exactly whether battery is full of by the slope that calculates fair curve, when having avoided by negative voltage slope control battery charge, the slope of erroneous judgement charging voltage and cause just reduce charging voltage when the battery underfill guaranteed to reduce charging voltage again battery is carried out floating charge after battery is full of.
In technique scheme, preferably, described calculation processing unit is used for calculating the difference of the adjacent reference voltage of all described reference voltages, and calculates the mean value of whenever presetting the adjacent difference of number in the described difference, generates described fair curve according to described mean value.
In technique scheme, preferably, described calculation processing unit also is used for the amplitude of described fair curve is amplified processing.
In this technical scheme, by amplifying the amplitude of fair curve, can determine more exactly that fair curve rises and downward trend, thereby whether the slope of judging fair curve has more exactly improved the accuracy rate of judging whether battery be full of less than default value.
In technique scheme, preferably, also comprise: the electric current acquiring unit, be connected to described target battery, be used for obtaining the specified charging current of described target battery; Charging control unit is connected to described electric current acquiring unit and described charge power supply, and providing the electric current that equates with described specified charging current for the described charge power supply of control is described target battery charging.
In this technical scheme, be this battery charge by providing with the equal-sized electric current of specified charging current of battery, can be under the prerequisite that guarantees charging process safety, be battery charge with bigger electric current, thereby reduce battery in the time of staying of high voltage region, and then reduce the dehydration degree of battery.
In technique scheme, preferably, described charging control unit is receiving battery reparation when instruction, and controlling described charge power supply, the electric current that equates with described specified charging current is provided is that described target battery is charged.
In this technical scheme, because prior art when battery is repaired, adopts the charging of little electric current crossing current, reach more than 30 hour repair time, and be the target battery charging by big electric current, can be implemented in 2 to 3 hours and repaired a Battery pack.
In technique scheme, preferably, described charging control unit is when receiving the quick charge instruction, and controlling described charge power supply is described target battery charging with the charging current more than or equal to 10 amperes.
In this technical scheme, pass through super-large current, can be implemented as target battery and carry out quick charge, fill target battery full fast, under the situation of charging current greater than the target battery rated current, full owing to filling fast, thus potential safety hazard can't be produced, and can shift to an earlier date the preheating target battery.
In technique scheme, preferably, described calculation processing unit also is used for calculating the maximum of described slope; Described comparing unit also is used for described maximum and default maximum are compared, if described maximum less than described default maximum, then sends second instruction to described output control unit; Described output control unit also is used for sending information when receiving described second instruction.
In this technical scheme, when slope and maximum during less than default maximum, illustrate that thermal runaway has taken place battery, this moment is by giving the alarm or pointing out the user to need to be serviced processing by indicator light.
In technique scheme, preferably, described output control unit sends described information by control indicator light or siren.
In technique scheme, preferably, described target battery comprises following at least a: lead-acid battery, nickel-cadmium cell, lithium battery.
By above technical scheme, can be when adopting negative voltage slope method to be battery charge, avoid because misoperation is carried out in the erroneous judgement of charging voltage rate of change, and can reduce the battery dehydration, the useful life of prolongation battery.
Wherein, the voltage record cell can be selected the voltage recorder of the RX6000A series of Hangzhou U.S. control Autotek S. r. l. for use, it is the processor of AE470G that calculation processing unit can be selected the model of Shenzhen Shiqiang Telecommunication Co., Ltd. for use, it is the comparator of LM360 that comparing unit can be selected the model of Texas Instrument for use, it is the controller of FX06 that output control unit can be selected the model of Beijing energy moral wisdom Science and Technology Ltd. for use, it is the polygraph of CF30R16 that the electric current acquiring unit can be selected the model of background yardstick circumference transducer Co., Ltd for use, and it is the controller of FX15 that charging control unit can be selected the model of Beijing energy moral wisdom Science and Technology Ltd. for use.
Description of drawings
Fig. 1 shows the block diagram according to the battery charger of embodiment of the present utility model;
Fig. 2 shows the flow chart according to the generation fair curve of embodiment of the present utility model;
Fig. 3 shows the structure chart according to the battery charger of embodiment of the present utility model.
Embodiment
In order more to be expressly understood above-mentioned purpose of the present utility model, feature and advantage, below in conjunction with the drawings and specific embodiments the utility model is further described in detail.Need to prove that under the situation of not conflicting, the application's embodiment and the feature among the embodiment can make up mutually.
A lot of details have been set forth in the following description so that fully understand the utility model; but; the utility model can also adopt other to be different from other modes described here and implement, and therefore, protection range of the present utility model is not subjected to the restriction of following public specific embodiment.
Fig. 1 shows the block diagram according to the battery charger of embodiment of the present utility model.
As shown in Figure 1, comprise according to the battery charger 100 of embodiment of the present utility model: charge power supply 102, be connected to target battery by output control unit 110, be used to the target battery charging; Voltage record cell 104 is connected to charge power supply 102 and calculation processing unit 106, is used for the charging voltage of 102 pairs of target battery of record charge power supply; Calculation processing unit 106, be connected to voltage record cell 104 and comparing unit 108, be used for according to the instruction of obtaining that receives, from charging voltage, obtain reference voltage at interval according to Preset Time, and according to preset algorithm the change rate curve of reference voltage is revised, obtain fair curve, and calculate the slope of fair curve; Comparing unit 108 is connected to calculation processing unit 108 and output control unit 110, is used for slope and default value are compared, if slope less than default value, then sends first instruction to output control unit 110; Output control unit 110 is used for when receiving first instruction charging voltage being dropped to the predeterminated voltage value.
Can for battery charge the time, record charging voltage, and (sensitivity of judging over-charging of battery if desired is higher to obtain reference voltage according to the time interval that the user arranges from the charging voltage of record, can be set) the less time interval, revise by the change rate curve to reference voltage, can obtain the higher fair curve of smoothness (namely having ignored the fluctuation of charging voltage curve among a small circle), and fair curve rises with real charging voltage curve and downward trend is identical, therefore whether the slope that can pass through to judge fair curve judges whether battery overcharge less than default value.And because the fair curve fluctuation is less, can determine exactly whether battery is full of by the slope that calculates fair curve, when having avoided by negative voltage slope control battery charge, the slope of erroneous judgement charging voltage and cause just reduce charging voltage when the battery underfill guaranteed to reduce charging voltage again battery is carried out floating charge after battery is full of.
Preferably, calculation processing unit 106 comprises: be used for calculating the difference of the adjacent reference voltage of all reference voltages, and whenever preset the mean value of the adjacent difference of number in the calculated difference, generate fair curve according to mean value.
Preferably, calculation processing unit 106 also is used for the amplitude of fair curve is amplified processing.
By amplifying the amplitude of fair curve, can determine more exactly that fair curve rises and downward trend, thereby whether the slope of judging fair curve has more exactly improved the accuracy rate of judging whether battery be full of less than default value.
Preferably, the battery charger 100 according to embodiment of the present utility model also comprises: electric current acquiring unit 112 is connected to target battery, for the specified charging current of obtaining target battery; Charging control unit 114 is connected to electric current acquiring unit 112 and charge power supply 102, and providing the electric current that equates with specified charging current for control charge power supply 102 is the target battery charging.
Be this battery charge by providing with the equal-sized electric current of specified charging current of battery, can be under the prerequisite that guarantees charging process safety, be battery charge with bigger electric current, thereby reduce battery in the time of staying of high voltage region, and then reduce the dehydration degree of battery.
Preferably, charging control unit 114 is when receiving battery reparation instruction, and it is the target battery charging that control charge power supply 102 provides the electric current that equates with specified charging current.
Because prior art when battery is repaired, adopts the charging of little electric current crossing current, reaches more than 30 hour repair time, and be the target battery charging by big electric current, can be implemented in 2 to 3 hours and repaired a Battery pack.
Preferably, charging control unit 114 is when receiving the quick charge instruction, and control charge power supply 102 is the target battery charging with the charging current more than or equal to 10 amperes.
By super-large current, can be implemented as target battery and carry out quick charge, fill target battery full fast, under the situation of charging current greater than the target battery rated current, full owing to filling fast, thus potential safety hazard can't be produced, and can shift to an earlier date the preheating target battery.
Preferably, calculation processing unit 106 also is used for the maximum of slope calculations; Comparing unit 108 also is used for maximum and default maximum are compared, if maximum less than default maximum, then sends second instruction to output control unit 110; Output control unit 110 also is used for sending information when receiving second instruction.
When slope and maximum during less than default maximum, illustrate that thermal runaway has taken place battery, this moment is by giving the alarm or pointing out the user to need to be serviced processing by indicator light.
Preferably, output control unit sends information by control indicator light or siren.
Preferably, target battery comprises following at least a: lead-acid battery, nickel-cadmium cell, lithium battery.
Fig. 2 shows the flow chart according to the generation fair curve of embodiment of the present utility model.
As shown in Figure 2, the flow process according to the generation fair curve of embodiment of the present utility model comprises:
Fig. 3 shows the structure chart according to the battery charger of embodiment of the present utility model.
As shown in Figure 3, the battery charger 100 according to embodiment of the present utility model comprises: charge power supply 102, voltage record cell 104, calculation processing unit 106, comparing unit 108, output control unit 110, electric current acquiring unit 112 and charging control unit 114.
When battery charger 100 charges for beginning target battery 402, at first electric current acquiring unit 112 obtains the specified charging current of target battery 402, and specified charging current is sent to charging control unit 114, it is target battery 402 chargings that charging control unit 114 control charge power supplies 102 provide the electric current that equates with specified charging current, specifically can adopt the above electric current of 4A, also can adopt the above electric current of 10A to quickly charging battery (in safe range), and when target battery 402 is repaired, also can adopt big electric current to charge, guarantee to repair fast target battery 402.
Be in the process of target battery 402 charging at battery charger 100, voltage record cell 104 can be according to the charging voltage of Preset Time interval acquiring charge power supply 102 outputs, and the charging voltage that gets access to transferred to calculation processing unit 106, calculation processing unit 106 calculates the rate of change of charging voltage, and according to certain algorithm the change rate curve of charging voltage is revised, thereby obtain comparatively level and smooth rate of change charging voltage change rate curve, calculation processing unit 106 is sent to comparing unit 108 with revised curve then, comparing unit 108 judges that whether the revised slope of a curve of curve is less than default value, if less than default value, illustrate that target battery 402 has been full of, then controlling output control unit 110 charging voltage is dropped to the predeterminated voltage value, is that target battery 402 continues charging in the floating charge mode.
Simultaneously, can also under the prerequisite that does not increase output line line footpath, lengthen output line, guarantee target battery 402 is full of.
More than be described with reference to the accompanying drawings the technical solution of the utility model, considered in the correlation technique, when adopting negative voltage slope method to be battery charge, by the detection of hardware circuit realization negative voltage slope, its flexibility is relatively poor, and it is frequent to detect misoperation.By the technical solution of the utility model, can when adopt negative voltage slope method to be battery charge, avoid carrying out misoperation because of the erroneous judgement to the charging voltage rate of change, and can reduce the battery dehydration, prolong the useful life of battery.
In the utility model, term " first ", " second " only are used for describing purpose, and can not be interpreted as indication or hint relative importance.Term " a plurality of " refers to two or more, unless clear and definite restriction is arranged in addition.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.
Claims (7)
1. a battery charger is characterized in that, comprising:
Charge power supply is connected to target battery by output control unit, is used to described target battery charging;
The voltage record cell is connected to described charge power supply and calculation processing unit, is used for the described charge power supply of record to the charging voltage of described target battery;
Described calculation processing unit, be connected to described voltage record cell and comparing unit, be used for according to the instruction of obtaining that receives, from described charging voltage, obtain reference voltage at interval according to Preset Time, and according to preset algorithm the change rate curve of described reference voltage is revised, obtain fair curve, and calculate the slope of described fair curve;
Described comparing unit is connected to described calculation processing unit and described output control unit, is used for described slope and default value are compared, if described slope less than described default value, then sends first instruction to described output control unit;
Described output control unit is used for when receiving described first instruction described charging voltage being down to the predeterminated voltage value;
Described calculation processing unit is used for calculating the difference of the adjacent reference voltage of all described reference voltages, and calculates the mean value of whenever presetting the adjacent difference of number in the described difference, generates described fair curve according to described mean value.
2. battery charger according to claim 1 is characterized in that, also comprises:
The electric current acquiring unit is connected to described target battery, is used for obtaining the specified charging current of described target battery;
Charging control unit is connected to described electric current acquiring unit and described charge power supply, and providing the electric current that equates with described specified charging current for the described charge power supply of control is described target battery charging.
3. battery charger according to claim 2 is characterized in that, described charging control unit is receiving battery reparation when instruction, and controlling described charge power supply, the electric current that equates with described specified charging current is provided is that described target battery is charged.
4. battery charger according to claim 2 is characterized in that, described charging control unit is when receiving the quick charge instruction, and controlling described charge power supply is described target battery charging with the charging current more than or equal to 10 amperes.
5. battery charger according to claim 1, it is characterized in that described comparing unit also is used for described computing unit is compared maximum and the default maximum that described slope calculates, if described maximum less than described default maximum, then sends second instruction to described output control unit;
Described output control unit also is used for sending information when receiving described second instruction.
6. battery charger according to claim 5 is characterized in that, described output control unit sends described information by control indicator light or siren.
7. according to each described battery charger in the claim 1 to 6, it is characterized in that described target battery comprises following at least a: lead-acid battery, nickel-cadmium cell, lithium battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320043673 CN203151137U (en) | 2013-01-24 | 2013-01-24 | Cell charging device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320043673 CN203151137U (en) | 2013-01-24 | 2013-01-24 | Cell charging device |
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| Publication Number | Publication Date |
|---|---|
| CN203151137U true CN203151137U (en) | 2013-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320043673 Expired - Lifetime CN203151137U (en) | 2013-01-24 | 2013-01-24 | Cell charging device |
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| CN (1) | CN203151137U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539804A (en) * | 2017-03-03 | 2018-09-14 | 北京小米移动软件有限公司 | Battery charging control method, battery charging control device and electronic equipment |
-
2013
- 2013-01-24 CN CN 201320043673 patent/CN203151137U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108539804A (en) * | 2017-03-03 | 2018-09-14 | 北京小米移动软件有限公司 | Battery charging control method, battery charging control device and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130821 |