CN202004492U - Embedding type NI-MH battery charge and discharge management system - Google Patents
Embedding type NI-MH battery charge and discharge management system Download PDFInfo
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- CN202004492U CN202004492U CN2011200749430U CN201120074943U CN202004492U CN 202004492 U CN202004492 U CN 202004492U CN 2011200749430 U CN2011200749430 U CN 2011200749430U CN 201120074943 U CN201120074943 U CN 201120074943U CN 202004492 U CN202004492 U CN 202004492U
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Abstract
The utility model discloses an embedding type NI-MH battery charge and discharge management system, which is characterized by comprising a CPU (central processing unit). The CPU is connected with a battery (11) by a discharge driving circuit (1), a charge driving circuit (2), an overload detection circuit (3), a temperature detection circuit (4), a voltage detection circuit (5) and a current detection circuit (6); and a power supply end of the CPU is connected with a system power supply (7) which is connected with the battery (11) and an external power supply (10). In the embedding type NI-MH battery charge and discharge management system, the charging can be carried out on a non-activated battery, the charging current error is less, the charging is full and the safety performance is high.
Description
Technical field
The utility model patent relates to a kind of NI-MH battery charging and discharging management system, relates in particular to a kind of novel embedded NI-MH battery charging and discharging management system.
Background technology
Prior art NI-MH battery charge mode all is to adopt the DC power supply input usually, and PWM regulates fixed current of duty ratio output battery is carried out constant current charge.The normally default cell voltage limit value of the decision condition of charging termination, constant current charge so far stop charging during magnitude of voltage.
Existing charging circuit is owing to adopting the DC power supply input, so can't be by the AC adapter charging or by contactless charging.Do not detect the capacity of battery before constant current charge in advance, the battery that activates for needs can't charge.In the constant current charge process, do not handle, so detected battery charging current error is bigger owing to carrying out ripple.The decision method of charging termination only is suitable for the decision condition of single voltage threshold, can't judge accurately whether battery is full of, if battery quality is relatively poor even cause security incident easily.
The utility model content
The purpose of this utility model is, a kind of embedded NI-MH battery charging and discharging management system is provided.It can charge to unactivated battery, and battery charging current error is little and charging is abundant, the security performance height.
The technical solution of the utility model: a kind of embedded NI-MH battery charging and discharging management system, it is characterized in that: comprise CPU, CPU links to each other with battery with overload detection circuit by discharge drive circuit, charging drive circuit, voltage detecting circuit, current detection circuit, temperature sensing circuit, the power end of CPU links to each other with system power supply, and system power supply links to each other with battery.
In the aforesaid embedded NI-MH battery charging and discharging management system, the charging end of described battery also is provided with rectification circuit and LC filter circuit.External power source can be that the direct current input also can be to exchange input; Secondly, the decision method of charging termination has adopted the synthetic determination method of five parameters of temperature rise of battery in the temperature, charging of negative increment, the battery of maximum charging voltage, the cell voltage of charging interval of comprising battery, battery.
Wherein, the discharge drive circuit is used for when eliminating memory effect of cell and activated batteries battery being discharged; The charging drive circuit is used for battery is charged; Voltage detecting circuit is used for detecting at battery charge and discharge process the terminal voltage of battery; Current detection circuit is used to detect the charging current of battery; Temperature sensing circuit is used to detect the ambient temperature of battery; Whether overload detection circuit is used to detect battery and transships; Rectification circuit is used for the electric current of charging circuit is carried out rectification; The LC filter circuit is used for the ripple of filtering in charging current.
Compared with prior art, the utility model is because the preceding CPU of charging can detect battery capacity and charging environment in advance by voltage detecting circuit, current detection circuit, temperature sensing circuit and overload detection circuit, determine the size adjustment whether needs are eliminated memory effect and charging current by discharge according to battery status again, so can the battery of free position be charged, the size that memory effect and charging current are eliminated in overdischarge is realized by discharge drive circuit and charging drive circuit.The utility model has added LC again and has removed the ripple circuit in the constant current charge circuit, so more accurate to the control of charging current.And for the judgement of charging termination, the present invention can be according to the synthetic determination method of detected five parameters (temperature rise of battery in the negative increment of the charging interval of battery, the maximum charging voltage of battery, cell voltage, the temperature of battery, the charging), five parameters all can have circuit of the present utility model to realize gathering, the fail safe of battery charge can be guaranteed, more than 95% of nominal capacity can be reached when battery is full of.The utility model makes battery charge more abundant, has reduced the capacitance loss of battery in long-term the use, has prolonged service time of product and the life-span of product after the single charge, has also strengthened security of products simultaneously.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the workflow diagram of the utility model embodiment.
Being labeled as in the accompanying drawing: 1-discharge drive circuit, 2-charging drive circuit, 3-overload detection circuit, 4-temperature sensing circuit, 5-voltage detecting circuit, 6-current detection circuit, 7-system power supply, 8-LC filter circuit, 9-rectification circuit, 10-external power source, 11-battery.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described, but not as the foundation to the utility model restriction.
Embodiment.A kind of embedded NI-MH battery charging and discharging management system, as shown in Figure 1, comprise CPU, CPU links to each other with battery 11 with current detection circuit 6 by discharge drive circuit 1, charging drive circuit 2, overload detection circuit 3, temperature sensing circuit 4, voltage detecting circuit 5, external power source 10 links to each other with battery 11 with LC filter circuit 8 by rectification circuit 9, the power end of CPU links to each other with system power supply 7, and system power supply 7 links to each other with external power source 10 with battery 11.
The course of work of the present utility model is as shown in Figure 2: charging flow is the voltage that at first detects current battery, if battery capacity is lower than set point, then fills set point by the 0.1C constant current; And then the constant current charge by 1C, meet the decision condition of charging termination until battery.Otherwise be discharged to set point earlier and eliminate memory effect, carry out the multi-stage constant current charging again.
Adopt the synthetic determination of five parameters (being the temperature rise of battery in the temperature, charging of negative increment, the battery of maximum charging voltage, the cell voltage of charging interval, the battery of battery), determine whether to stop charging by fuzzy algorithmic approach again.This synthetic determination method reflects the true capacity of battery more accurately, makes battery charge more abundant, also prevented simultaneously battery overcharge and owe dash, and eliminated of the influence of the memory effect of battery to a certain extent to battery capacity.
The specific descriptions of each parts are as follows.
Discharge drive circuit: CPU discharges to battery by the break-make of power MOS pipe in the control of inner TIMER configuration IO mouth output pwm pulse, simultaneously by detecting the discharging current of resistance detection battery.
Charging drive circuit: CPU charges to battery by the break-make of power MOS pipe in the control of inner TIMER configuration IO mouth output pwm pulse, simultaneously by detecting the charging current of resistance detection battery.
Overload detection circuit: one of series connection detects resistance in the loop of load, and CPU obtains the operating current of load by the voltage that inner ADC10 module detects the resistance two ends, thereby has judged whether that overload takes place.
Temperature sensing circuit: series thermal-sensitive resistance and detection resistance between power supply and ground wire, CPU calculates battery temperature by the voltage at inner ADC10 module detection resistance two ends according to the temperature coefficient of thermistor.
Voltage detecting circuit: CPU directly detects the voltage at battery two ends by inner ADC10 module.
Current detection circuit: CPU obtains the charging current of battery by the voltage at inner ADC10 module detection resistance two ends.
System power supply: the operating voltage that the voltage of battery or external power source is risen to system by the DC/DC circuit that boosts.
LC filter circuit: form low-pass filter circuit, filtering ripple and high-frequency interferencing signal by series inductance and shunt capacitance.
Rectification circuit: the negative voltage of removing external power source by half-wave rectifying circuit.
External power source: outside interchange or DC power source adapter.
Battery: 1.2V/750mAh rechargeable nickel-hydrogen battery.
Claims (2)
1. embedded NI-MH battery charging and discharging management system, it is characterized in that: comprise CPU, CPU links to each other with battery (11) with current detection circuit (6) by discharge drive circuit (1), charging drive circuit (2), overload detection circuit (3), temperature sensing circuit (4), voltage detecting circuit (5), the power end of CPU links to each other with system power supply (7), and system power supply (7) links to each other with external power source (10) with battery (11).
2. embedded NI-MH battery charging and discharging management system according to claim 1, it is characterized in that: the charging end of described battery (11) also is provided with rectification circuit (9) and LC filter circuit (8), and external power source (10) links to each other with battery (11) with LC filter circuit (8) by rectification circuit (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200749430U CN202004492U (en) | 2011-03-21 | 2011-03-21 | Embedding type NI-MH battery charge and discharge management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200749430U CN202004492U (en) | 2011-03-21 | 2011-03-21 | Embedding type NI-MH battery charge and discharge management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202004492U true CN202004492U (en) | 2011-10-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200749430U Expired - Lifetime CN202004492U (en) | 2011-03-21 | 2011-03-21 | Embedding type NI-MH battery charge and discharge management system |
Country Status (1)
| Country | Link |
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| CN (1) | CN202004492U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111211610A (en) * | 2020-02-21 | 2020-05-29 | 森克创能(天津)新能源科技有限公司 | Intelligent charger for zinc-nickel battery and battery pack |
-
2011
- 2011-03-21 CN CN2011200749430U patent/CN202004492U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111211610A (en) * | 2020-02-21 | 2020-05-29 | 森克创能(天津)新能源科技有限公司 | Intelligent charger for zinc-nickel battery and battery pack |
| CN111211610B (en) * | 2020-02-21 | 2022-01-25 | 森克创能(天津)新能源科技有限公司 | Intelligent charger for zinc-nickel battery and battery pack |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: LIERDA TECHNOLOGY GROUP CO., LTD. Free format text: FORMER NAME: LIERDA SCIENCE AND TECHNOLOGY CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 310011 Gongshu District, Hangzhou Province, harmony Road, building A, room 1201, room, 18 Patentee after: Lierda Science & Technology Group Co., Ltd. Address before: Lilda science and Technology Building No. 425 Hangzhou City, Zhejiang province Gongshu District Dengyun road 310011 14 floor Patentee before: Lierda Science and Technology Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20111005 |