CN101039026A - Protective circuit for battery - Google Patents
Protective circuit for battery Download PDFInfo
- Publication number
- CN101039026A CN101039026A CNA2006100247599A CN200610024759A CN101039026A CN 101039026 A CN101039026 A CN 101039026A CN A2006100247599 A CNA2006100247599 A CN A2006100247599A CN 200610024759 A CN200610024759 A CN 200610024759A CN 101039026 A CN101039026 A CN 101039026A
- Authority
- CN
- China
- Prior art keywords
- circuit module
- signal input
- module
- battery
- discharge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses a battery protecting circuit, which includes a main switch transistor and a switch transistor logic control circuit module, wherein one end of the main switch transistor is connected to a battery source end, another end of the main switch transistor is connected to a battery source load end, and the switch transistor logic control circuit module is connected to the main switch transistor, and the protecting circuit further includes a over temperature detecting circuit module which is connected the switch transistor logic control circuit module. The invention can not only detect the state of overlarge persistent current, but can also effectively avoid the damage to the battery circuit caused by overlarge pulse current and other state causing temperature rising, thus the performance of the battery protecting circuit is greatly improved.
Description
Technical field
The present invention relates to a kind of battery protecting circuit.
Background technology
Now, along with popularizing of portable type electronic product, it is more and more wider that the application of rechargeable battery also becomes.When rechargeable battery is charged, because the user can not wait for always that battery charge finishes and powered-down, therefore just need battery when charging finishes, to cut off the power supply automatically, and guarantee in charging process, can any danger not take place because of the various variations of electric current.When using rechargeable battery, if because improper use or short circuit, battery can be emitted very big electric current, so not only battery and chip circuit is had very big damage, but also is very easy to cause danger.For fear of the generation of above-mentioned situation, existing rechargeable battery generally all can be furnished with corresponding charging and discharging protective circuit.
Existing charging and discharging protective circuit generally comprises three parts, i.e. overdischarge current detection circuit module, the current detection circuit module of overcharging and battery protection control circuit and switching circuit module.In charging or discharge; when electric current is excessive; the current detection circuit module of overcharging or overdischarge current detection circuit module will be sent signal to battery protection control circuit and switching circuit module; expression charging current or discharging current are excessive; and battery protection control circuit and switching circuit module pick up counting after receiving signal; when the duration of excessive electric current surpasses the setting-up time of circuit; battery protection control circuit and switching circuit will be taked certain measure; such as outage, to avoid the damage of excessive electric current to battery and circuit.But; after continuing for some time, the excessive electric current of existing this battery protecting circuit needs could effectively protect battery and circuit; if excessive electric current is the very big pulse current of duty ratio; its each pulse all is only to continue the very short time; and for a long time by this electric current; also can cause very big damage to battery and chip circuit, existing battery protecting circuit just can not play a protective role.
Summary of the invention
Technical problem to be solved by this invention provides a kind of battery protecting circuit; not only when continuous current is excessive, can play a protective role to battery circuit; and when pulse current or other electric current are excessive, also can protect battery circuit; and when the improper rising of the temperature of battery circuit, also can protect battery circuit.
For solving the problems of the technologies described above; the technical scheme of battery protecting circuit of the present invention is; comprise main switch and switching tube logic control circuit module; described main switch one end connects the battery supply end; the other end connects load end; described switching tube logic control circuit module is connected with described main switch, also comprises excess temperature testing circuit module, and described excess temperature testing circuit module is connected with described switching tube logic control circuit module.
The present invention is by monitoring the temperature of battery circuit with temperature sensor; whether can cause damage to detect charging current or discharging current to battery and circuit; not only can detect the excessive situation of continuous current; can also effectively avoid damage excessive because of pulse current and that other situation that causes temperature to raise causes battery circuit, improve the performance of battery protecting circuit greatly.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described:
Fig. 1 has the structural representation of excess temperature testing circuit module for battery protecting circuit of the present invention;
Fig. 2 has the structural representation that discharges and recharges the decision circuitry module for battery protecting circuit of the present invention;
Fig. 3 is the structural representation of excess temperature testing circuit in the battery protecting circuit of the present invention;
Fig. 4 is for discharging and recharging the schematic diagram of comparator in the decision circuitry among the present invention;
Fig. 5 is the structural representation of another embodiment of battery protecting circuit of the present invention.
Embodiment
As shown in Figure 1; battery protecting circuit of the present invention; comprise main switch and switching tube logic control circuit module; described main switch one end connects the battery supply end; the other end connects load end; described switching tube logic control circuit module is connected with described main switch, also comprises excess temperature testing circuit module, and described excess temperature testing circuit module is connected with described switching tube logic control circuit module.When temperature was too high, described excess temperature testing circuit module just passed to the excess temperature signal described switching tube logic control circuit module, and the break-make of described afterwards switching tube logic control circuit module controls main switch is to protect battery circuit.
As shown in Figure 2; battery protecting circuit of the present invention; also comprise two application of logic circuit module; one discharges and recharges a decision circuitry module and an excess temperature testing circuit module; described application of logic circuit module comprises the excess temperature signal input part; discharge and recharge signal input part and control signal output ends; the output of described excess temperature testing circuit module is connected with the excess temperature signal input part of described two application of logic circuit module respectively; the described charging output that discharges and recharges the decision circuitry module is connected with the signal input part that discharges and recharges of a described application of logic circuit module; the described discharge output that discharges and recharges the decision circuitry module is connected with the signal input part that discharges and recharges of described another application of logic circuit module, and two signal input end of described switching tube logic control circuit module are connected with the control signal output ends of described two application of logic circuit module respectively.
Described excess temperature testing circuit modular structure can be as shown in Figure 3, and it comprises a current source, the positive pole of the described current source resistance R 1 of connecting, and the other end ground connection of described resistance R 1, the negative pole of current source connects power supply.On the positive pole of current source, also be connected to the base stage of a triode, the grounded emitter of described triode, the collector electrode of the described triode resistance R 2 of connecting, another termination power of described resistance R 2.The collector electrode of described triode is outwards exported the excess temperature signal.When temperature raises, described resistance R 1 resistance value and the voltage between transistor base and the emitter will change, thereby the variation that produces voltage at collector electrode, this change in voltage is just exported to the external world as the excess temperature signal.
When the temperature of circuit is too high, excess temperature testing circuit module can be issued application of logic circuit module by the signal that temperature is too high, discharge and recharge the decision circuitry module simultaneously and judge it is at this moment in charging or in discharge, if charge, the described decision circuitry module that discharges and recharges sends charging signals to the application of logic circuit module that is connected with the charging signals output; If discharge, the described decision circuitry module that discharges and recharges sends discharge signal to the application of logic circuit module that is connected with the discharge signal output.Receive that the charging or the application of logic circuit module of discharge signal received the too high signal of temperature of excess temperature testing circuit module simultaneously; this moment, this application of logic circuit module just sent signal to switching tube logic control circuit module; switching tube logic control circuit module receives that controlling main switch immediately after this signal disconnects power supply, is not damaged with protective circuit.
As shown in Figure 4, the described decision circuitry module that discharges and recharges comprises a comparator, and an input of described comparator is connected with battery supply end Vdd, and another input is connected with load end VM.When the voltage of battery supply end is higher than the voltage of load end, illustrate that battery discharges; When the voltage of battery supply end is lower than the voltage of load end, illustrate that battery charges.Can judge the operating state of battery in this way.
Another embodiment of the present invention can be referring to Fig. 5.
On circuit base described above; battery protecting circuit of the present invention also comprises an overdischarge current detection circuit module; describedly discharge and recharge the application of logic circuit module that input is connected with the discharge output that discharges and recharges the decision circuitry module and comprise that also one crosses the discharge signal input, the discharge signal output of crossing of described overdischarge current detection circuit module is connected with described mistake discharge signal input.
Battery protecting circuit of the present invention also comprises the current detection circuit module of overcharging; describedly discharge and recharge the application of logic circuit module that input is connected with the charging output that discharges and recharges the decision circuitry module and comprise that also one overcharges signal input part, the signal output part that overcharges of the described current detection circuit module of overcharging is connected with the described signal input part that overcharges.
Above-mentioned overdischarge current detection circuit module has been arranged and the current detection circuit module of overcharging, when electric current is excessive, the overdischarge current detection circuit module or the current detection circuit module of overcharging just send information to corresponding application of logic circuit module, corresponding afterwards application of logic circuit module is to switching tube logic control circuit module sending controling instruction, with the conducting of control main switch with end.Like this, when and temperature circuit excessive when electric current also do not raise, battery protecting circuit still can be taked the corresponding protection measure to battery and circuit, thereby has improved the fail safe and the reliability of battery protecting circuit greatly.
In addition, the present invention comprises that also one crosses under voltage testing circuit module, the described signal input part of crossing under voltage testing circuit module is connected with the battery-end power supply, and the described signal output part of crossing under voltage testing circuit module is connected with a signal input end of described switching tube logic control circuit module.When the voltage of battery supply end takes place when unusual; describedly cross under voltage testing circuit module just can to detect supply voltage be too high or too low; and transmit control signal, thereby to control the break-make protective circuit of main switch to the switching tube logic control circuit.
The present invention also comprises a load short circuits testing circuit module, the signal input part of described load short circuits testing circuit module is connected with load end, and the signal output part of described load short circuits testing circuit module is connected with a signal input end of described switching tube logic control circuit module.When described load short circuits testing circuit module detects load and is short-circuited, this module will transmit control signal to described switching tube logic control circuit module, switching tube logic control circuit module is disconnected main switch, damage circuit with the short circuit of avoiding load.
Claims (7)
1. battery protecting circuit; comprise main switch and switching tube logic control circuit module; described main switch one end connects the battery supply end; the other end connects load end; described switching tube logic control circuit module is connected with described main switch; it is characterized in that, also comprise excess temperature testing circuit module, described excess temperature testing circuit module is connected with described switching tube logic control circuit module.
2. battery protecting circuit according to claim 1; it is characterized in that; between described excess temperature testing circuit module and described switching tube logic control circuit module, also comprise two application of logic circuit module; discharge and recharge decision circuitry module and excess temperature testing circuit module; described application of logic circuit module comprises the excess temperature signal input part; discharge and recharge signal input part and control signal output ends; the output of described excess temperature testing circuit module is connected with the excess temperature signal input part of described two application of logic circuit module respectively; the described charging output that discharges and recharges the decision circuitry module is connected with the signal input part that discharges and recharges of a described application of logic circuit module; the described discharge output that discharges and recharges the decision circuitry module is connected with the signal input part that discharges and recharges of described another application of logic circuit module, and two signal input end of described switching tube logic control circuit module are connected with the control signal output ends of described two application of logic circuit module respectively.
3. battery protecting circuit according to claim 2 is characterized in that, the described decision circuitry module that discharges and recharges comprises a comparator, and an input of described comparator is connected with the battery supply end, and another input is connected with load end.
4. battery protecting circuit according to claim 2; it is characterized in that; also comprise an overdischarge current detection circuit module; describedly discharge and recharge the application of logic circuit module that input is connected with the discharge output that discharges and recharges the decision circuitry module and comprise that also one crosses the discharge signal input, the discharge signal output of crossing of described overdischarge current detection circuit module is connected with described mistake discharge signal input.
5. battery protecting circuit according to claim 2; it is characterized in that; also comprise the current detection circuit module of overcharging; describedly discharge and recharge the application of logic circuit module that input is connected with the charging output that discharges and recharges the decision circuitry module and comprise that also one overcharges signal input part, the signal output part that overcharges of the described current detection circuit module of overcharging is connected with the described signal input part that overcharges.
6. battery protecting circuit according to claim 1; it is characterized in that; comprise that also one crosses under voltage testing circuit module; the described signal input part of crossing under voltage testing circuit module is connected with the battery-end power supply, and the described signal output part of crossing under voltage testing circuit module is connected with a signal input end of described switching tube logic control circuit module.
7. battery protecting circuit according to claim 1; it is characterized in that; also comprise a load short circuits testing circuit module; the signal input part of described load short circuits testing circuit module is connected with load end, and the signal output part of described load short circuits testing circuit module is connected with a signal input end of described switching tube logic control circuit module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100247599A CN101039026A (en) | 2006-03-16 | 2006-03-16 | Protective circuit for battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100247599A CN101039026A (en) | 2006-03-16 | 2006-03-16 | Protective circuit for battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101039026A true CN101039026A (en) | 2007-09-19 |
Family
ID=38889743
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2006100247599A Pending CN101039026A (en) | 2006-03-16 | 2006-03-16 | Protective circuit for battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101039026A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101707350A (en) * | 2009-10-21 | 2010-05-12 | 海洋王照明科技股份有限公司 | Overheat protection circuit and switch power supply circuit |
| CN102118016A (en) * | 2009-12-31 | 2011-07-06 | 比亚迪股份有限公司 | Charger protection circuit, charger provided with same and manufacturing method thereof |
| CN105489950A (en) * | 2015-11-25 | 2016-04-13 | 青岛盛嘉信息科技有限公司 | Self-switched three-battery structure |
-
2006
- 2006-03-16 CN CNA2006100247599A patent/CN101039026A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101707350A (en) * | 2009-10-21 | 2010-05-12 | 海洋王照明科技股份有限公司 | Overheat protection circuit and switch power supply circuit |
| CN101707350B (en) * | 2009-10-21 | 2013-08-28 | 海洋王照明科技股份有限公司 | Overheat protection circuit and switch power supply circuit |
| CN102118016A (en) * | 2009-12-31 | 2011-07-06 | 比亚迪股份有限公司 | Charger protection circuit, charger provided with same and manufacturing method thereof |
| CN102118016B (en) * | 2009-12-31 | 2014-03-12 | 比亚迪股份有限公司 | Charger protection circuit, charger provided with same and manufacturing method thereof |
| CN105489950A (en) * | 2015-11-25 | 2016-04-13 | 青岛盛嘉信息科技有限公司 | Self-switched three-battery structure |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101174770B (en) | Charging protection device | |
| CN107565684B (en) | Integrated AC detection and power control system for emergency lighting | |
| CN102882244A (en) | Battery managing system | |
| CN2814762Y (en) | Vehicle load electric control switch with short-circuit and open-circuit predetection | |
| CN102957173A (en) | Multi-cell serially-connected lithium battery pack equalization and protection system | |
| JP7244632B2 (en) | Composite current collectors, electrode sheets, electrochemical devices and electronic devices | |
| CN213367449U (en) | Ignition prevention circuit of battery management system and battery pack | |
| CN111082495A (en) | BMS power supply system and control method thereof | |
| CN102122812A (en) | Over-charging protective device for rechargeable battery | |
| CN103094931A (en) | Power supply system and power protection circuit thereof | |
| CN101039026A (en) | Protective circuit for battery | |
| CN201918770U (en) | DC charge-discharge system | |
| CN2852492Y (en) | Automatic butt joint device for charger polarity | |
| CN203813493U (en) | Intelligent charging control device for storage battery of electric vehicle | |
| CN102957172A (en) | Multi-cell serially-connected lithium battery pack equalization and protection system | |
| CN101123364B (en) | Over charging/discharging protection circuit for charging/discharging system of multiple serial battery | |
| CN101345425A (en) | Intelligentized battery charge control circuit | |
| CN103066648A (en) | Battery driving equalization circuit | |
| CN202363872U (en) | Power supply system and power protection circuit thereof | |
| CN205847076U (en) | AC D/C power | |
| CN106655107A (en) | High power lithium battery protector | |
| CN213122205U (en) | Direct current relay on-off detection circuit | |
| CN107508457A (en) | Direct-current dual power starts and switching current-limiting circuit | |
| CN105006849A (en) | Intelligent switching-off control system of battery charger | |
| CN203368008U (en) | Solar fan circuit with function of charge and discharge protection |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |