CN203522159U - Cell protection circuit - Google Patents
Cell protection circuit Download PDFInfo
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- CN203522159U CN203522159U CN201320640459.9U CN201320640459U CN203522159U CN 203522159 U CN203522159 U CN 203522159U CN 201320640459 U CN201320640459 U CN 201320640459U CN 203522159 U CN203522159 U CN 203522159U
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Abstract
The utility model provides a cell protection circuit which comprises a cell protection unit, a switch combination circuit, a first capacitor, and a first resistor. The cell protection circuit also comprises a first detection end connected with the positive electrode of a chip, a second detection end connected with the negative electrode of the chip, a third detection end connected with a second power end, a charging control end, and a discharging control end. During the abnormity of charging, the charging control end outputs a charging protection signal; during the abnormity of discharging, the discharging control end outputs a discharging protection signal. The switch combination circuit is connected between the negative electrode of the chip and the second power end. The positive electrode of the chip is connected with a first power end. The first resistor is connected between the second power end and the third detection end. The capacitor is connected between the third detection end and the negative electrode of the chip. Compared with the prior art, the cell protection circuit provided by the utility model can improve the performance of antistatic detection.
Description
[technical field]
The utility model relates to circuit design field, particularly a kind of battery protecting circuit that improves antistatic test performance.
[background technology]
Battery protecting circuit is installed in battery conventionally, for example, at mobile phone cell inner, has a very little printed circuit board (PCB) (Printed Circuit Board is called for short PCB), and battery protecting circuit is just arranged on this printed circuit board (PCB).Battery protecting circuit is for battery is discharged and recharged to control, and its basic function comprises overvoltage charge protection, overvoltage discharge prevention, electric discharge overcurrent protection, charging overcurrent protection and short-circuit protection.
Please refer to shown in Fig. 1, it is the circuit diagram of battery protecting circuit in prior art.Described battery protecting circuit comprises battery protection chip (or claiming battery protection unit) 110, switch combination circuit 120, resistance R 1, resistance R 2 and capacitor C 1.
The first power end VP of described battery protecting circuit is directly connected with the positive pole of battery core Bat; the second source end VM of described battery protecting circuit is connected with the negative pole G of battery core Bat by switch combination circuit 120, and resistance R 1 and capacitor C 1 are series between the positive pole and negative pole G of battery core Bat.When load resistance R0 is connected between the first power end VP and second source end VM, described battery core Bat is in discharge condition; When battery charger 130 is just being connected between the first power end VP and second source end VM, described battery core Bat is in charged state.
Described switch combination circuit 120 comprises a NMOS(N-Channel Metal Oxide Semiconductor) transistor MN1 and the second nmos pass transistor MN2.The source electrode of described the first nmos pass transistor MN1 is connected with the negative pole G of described battery core Bat, its drain electrode is connected with the drain electrode of described the second nmos pass transistor MN2, the source electrode of described the second nmos pass transistor MN2 is connected with described second source end VM, and parasitism has diode (not shown) in nmos pass transistor MN1, in nmos pass transistor MN2, parasitism has diode (not shown).
Described battery protection chip 110 comprises three links (or being called test side) and two control ends.Three links are respectively the first test side (or claiming battery core anode connection terminal) VDD being connected with battery core BAT positive pole, the second test side (or claiming earth terminal) VSS and the 3rd test side VMI being connected with second source end VM that are connected with battery core BAT negative pole G, and two control ends are respectively charging control end CO and control of discharge end DO.Wherein, link VDD is connected with the connected node between resistance R 1 and capacitor C 1, link VSS is connected with the negative pole G of battery core Bat, link VMI is connected with second source end VM by resistance R 2, charging control end CO is connected with the grid of nmos pass transistor MN2, and control of discharge end DO is connected with the grid of nmos pass transistor MN1.
Shown in figure 1, described battery protection chip 110 comprises the testing circuit 112 that overcharges, overdischarge testing circuit 114, electric discharge over-current detection circuit 116, charging over-current detection circuit (not indicating), short-circuit detecting circuit 117 and control circuit 118.Described control circuit 118 according to described in the overcharge detection signal of testing circuit 112, overdischarge testing circuit 114, electric discharge over-current detection circuit 116, charging over-current detection circuit and short-circuit detecting circuit 117 outputs generate charging control signal and export by charging control end CO, generate discharge control signal and also by control of discharge end DO, export.Concrete, the voltage that battery core Bat detected when battery protection chip 110 (for example surpasses overvoltage charge threshold, 4.3V), and the duration is greater than over-charge protective time of delay (for example 100mS), the charging control signal CO exporting by control circuit 118 is low level, nmos pass transistor MN2 is turn-offed, to cut off the charge circuit of battery core Bat, thereby realize, forbid charging; The voltage that battery core Bat detected when battery protection chip 110 for example, lower than overvoltage discharge threshold (2.3V), and the duration is greater than Cross prevention time of delay (for example 40mS), the discharge control signal DO exporting by control circuit 118 is low level, nmos pass transistor MN2 is turn-offed, to cut off the discharge loop of battery core Bat, thereby realize, forbid electric discharge; The voltage that second source end VM detected when battery protection chip 110 for example, higher than electric discharge overcurrent threshold value (150mV), and the duration is greater than overcurrent discharge prevention time of delay (for example 12mS), the discharge control signal DO exporting by control circuit 118 is low level, nmos pass transistor MN2 is turn-offed, thereby realize, forbid electric discharge; The voltage that second source end VM detected when battery protection chip 110 for example, higher than short-circuit protection threshold value (1V); and the duration is greater than short-circuit protection time of delay (for example 2～80uS); the signal DO1 exporting by control circuit 118 is low level; nmos pass transistor MN2 is turn-offed, thereby realize, forbid electric discharge.
But, in actual applications, for example, above-mentioned protective circuit is mounted to battery, then battery is mounted in mobile phone, when mobile phone is carried out to electrostatic test, often there will be after electrostatic impact, there is the phenomenon of shutdown in mobile phone.Although can improve by improving the PCB design of interior of mobile phone the antistatic test performance of battery protecting circuit; but higher to the designing requirement of mobile phone printed circuit board (PCB) like this; sometimes in order to meet the design of mobile phone compactedness, cannot meet the requirement that electrostatic test does not shut down.
Therefore, be necessary to provide a kind of improved technical scheme to overcome the problems referred to above.
[utility model content]
The purpose of this utility model is to provide a kind of battery protecting circuit, and it can improve the antistatic detection performance of battery protecting circuit, and then the phenomenon of shutting down does not appear in realization when mobile phone is carried out to electrostatic test.
In order to address the above problem, the utility model provides a kind of battery protecting circuit, and it comprises battery protection unit, switch combination circuit, the first electric capacity and the first resistance.Described battery protecting circuit comprises and anodal the first test side being connected of battery core, the second test side being connected with battery core negative pole, the 3rd test side being connected with second source end, charging control end and control of discharge end, described battery protecting circuit detects the charging and discharging circuit of battery core based on the first test side, the second test side and the 3rd test side, with when charging is abnormal, by described charging control end output charge protection signal, when electric discharge is abnormal, by described control of discharge end output discharge prevention signal; Described switch combination circuit is connected between described battery core negative pole and second source end, and it is according to the charge circuit of battery core described in described charge protection signal cut, according to the discharge loop of battery core described in described discharge prevention signal cut; The positive pole of described battery core is connected with the first power end, and described the first resistance is connected between second source end and the 3rd test side, and described electric capacity is connected between described the 3rd test side and the negative pole of described battery core.
Further, the product of the resistance value of the first resistance and the first electric capacity is greater than and in mobile phone electrostatic test, causes the maximum length in time that second source end VM is positive voltage.
Further, described the first resistance equals 2.2K ohm, and described the first electric capacity equals 0.1uF.
Further, described charging comprises that charging overcurrent is abnormal and charging overvoltage is abnormal extremely, described electric discharge comprises it being that electric discharge overcurrent is abnormal, electric discharge overvoltage is abnormal and short circuit extremely, whether the charging voltage of the voltage detecting battery core Bat of described battery protecting circuit based on the first test side VDD and the second test side VSS is abnormal, and whether the charging current that its voltage based on the 3rd test side detects battery core is abnormal; Whether the discharge voltage of the voltage detecting battery core Bat of described battery protecting circuit based on the first test side VDD and the second test side VSS is abnormal; whether its voltage based on the 3rd test side detects the discharging current of battery core abnormal, and its voltage based on the 3rd test side detects battery core and whether occurs short circuit.
Further, described switch combination circuit comprises the first nmos pass transistor and the second nmos pass transistor, the source electrode of described the first nmos pass transistor is connected with the negative pole of described battery core, its grid is connected with described control of discharge end, its drain electrode is connected with the drain electrode of described the second nmos pass transistor, the grid of described the second nmos pass transistor is connected with described charging control end, and its source electrode is connected with described second source end.
Further, when charging generation is abnormal, described battery protecting circuit is controlled the second nmos pass transistor cut-off, to cut off charge circuit; When electric discharge generation is abnormal, described battery protecting circuit is controlled the first nmos pass transistor cut-off, to cut off discharge loop.
Further, described the first test side is connected with the positive pole of described battery core by the second resistance, and described the first test side is connected with described the second test side by the second electric capacity.
Compared with prior art, the battery protecting circuit in the utility model, by existing battery protecting circuit is improved, can improve the antistatic detection performance of battery protecting circuit, and then the phenomenon of shutting down does not appear in realization when mobile phone is carried out to electrostatic test.
[accompanying drawing explanation]
In order to be illustrated more clearly in the technical scheme of the utility model embodiment, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.Wherein:
Fig. 1 is the circuit diagram of electric power management circuit of the prior art;
Fig. 2 is the circuit diagram of the electric power management circuit in the utility model.
[embodiment]
For above-mentioned purpose of the present utility model, feature and advantage can be become apparent more, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Alleged " embodiment " or " embodiment " refers to special characteristic, structure or the characteristic that can be contained at least one implementation of the utility model herein.Different local in this manual " in one embodiment " that occur not all refer to same embodiment, neither be independent or the embodiment mutually exclusive with other embodiment optionally.Unless stated otherwise, the word that connection herein, the expression that is connected, joins are electrically connected all represents to be directly or indirectly electrical connected.
By a large amount of experiments, find, in mobile phone electrostatic test, general accumulation of static electricity electric charge can cause the second source end VM accumulation positive charge of battery protecting circuit as shown in Figure 1, making second source end VM is positive voltage, and also find that by experiment electrostatic test can cause the maximum length in time that second source end VM is positive voltage to be about 200us, this time is longer than the short circuit time of delay of many battery protection chip 110 interior settings, thereby in mobile phone electrostatic test, make described battery protection chip 110 erroneous judgements break and occur short circuit, cause the discharge loop of battery of mobile phone to be cut off, there is shutdown phenomenon.Based on above-mentioned analysis, by existing battery protecting circuit is improved, there is not to realize the phenomenon of shutting down in the battery protecting circuit in the utility model when mobile phone is carried out to electrostatic test.
Please refer to shown in Fig. 2, it is the circuit diagram of the battery protecting circuit in the utility model.Described battery protecting circuit comprises battery protection unit 110, switch combination circuit 120, resistance R 1, capacitor C 1, resistance R 2 and capacitor C 2.
Described battery protection unit 110 comprises three links (or being called test side) and two control ends.Three links are respectively the first test side (or claiming battery core anode connection terminal) VDD being connected with battery core BAT positive pole, the second test side (or claiming earth terminal) VSS and the 3rd test side VMI being connected with second source end VM that are connected with battery core BAT negative pole G.Two control ends are respectively charging control end CO and control of discharge end DO.Wherein, the positive pole of described battery core BAT is connected with the first power end VP; Described the first test side VDD is connected with the positive pole of described battery core BAT by the first resistance R 1; Described the first test side VDD is connected with described the second test side VSS by capacitor C 1; Described the 3rd test side VMI is connected with described second source end VM by the second resistance R 2; Described the 3rd test side VMI is connected with the negative pole G of battery core BAT by described capacitor C 2.Described battery protection unit 110 detects the charging and discharging circuit of battery core BAT based on the first test side VDD, the second test side VSS and the 3rd test side VMI; to export charge protection signal by described charging control end CO when charging is abnormal, when electric discharge is abnormal, by described control of discharge end DO, export discharge prevention signal.
In the embodiment shown in Figure 2, described battery protection chip 110 comprises the testing circuit 112 that overcharges, overdischarge testing circuit 114, electric discharge over-current detection circuit 116, charging over-current detection circuit (not indicating), short-circuit detecting circuit 117 and control circuit 118.Described control circuit 118 according to described in the detection signal that testing circuit 112, overdischarge testing circuit 114, electric discharge over-current detection circuit 116, charging over-current detection circuit and short-circuit detecting circuit 117 provide that overcharges generate charging control signal and export by charging control end CO, generate discharge control signal and also by control of discharge end DO, export.
Below specifically introduce the course of work of the battery protection chip 110 in Fig. 2.
Described overcharge testing circuit 112 and described charging over-current detection circuit whether abnormal for detection of the charging of battery core Bat.Whether the charging voltage of the described voltage detecting battery core Bat of testing circuit 112 based on the first test side VDD and the second test side VSS that overcharge is abnormal, for example, when the voltage difference (it equals the voltage of battery core Bat) of the first test side VDD and the second test side VSS (is greater than predefined overvoltage charge threshold, in the time of 4.3V), its output abnormality charging voltage detection signal (representing that charging voltage is abnormal), otherwise export non-abnormal charging voltage detection signal.The voltage of described charging over-current detection circuit based on the 3rd test side VMI determines that whether the charging current of battery core Bat is abnormal, when the voltage of the 3rd test side VMI is less than predefined charging overcurrent threshold value, its output abnormality charging current detection signal (representing that charging current is abnormal), otherwise export non-abnormal charging current detection signal.Described control circuit 118 is forbidden charging control signal (charge protection signal) by described charging control end CO output when receiving abnormal charging current detection signal and/or abnormal charging voltage detection signal (expression charging is abnormal); otherwise, by described charging control end CO output, allow charging control signal.This is forbidden discharge control signal and allows discharge control signal can be two kinds of logic states of a signal, such as, forbid that discharge control signal is low level, described permission discharge control signal is high level.
Whether described overdischarge testing circuit 114, electric discharge over-current detection circuit 116 and short-circuit detecting circuit 117 be abnormal for detection of the electric discharge of battery core Bat.Whether the discharge voltage of the voltage detecting battery core Bat of described overdischarge testing circuit 114 based on the first test side VDD and the second test side VSS is abnormal, for example, when the voltage difference (it equals the voltage of battery core Bat) of the first test side VDD and the second test side VSS (is less than predefined overvoltage discharge threshold, in the time of 2.3V), its output abnormality discharge voltage detection signal (representing that discharge voltage is abnormal), otherwise export non-paradoxical discharge voltage detection signal.The voltage of described electric discharge over-current detection circuit 116 based on the 3rd test side VMI determines that whether the discharging current of battery core Bat is abnormal, for example, when the voltage of the 3rd test side VMI (is greater than predefined electric discharge overcurrent threshold value, in the time of 150mV), its output abnormality discharging current detection signal (representing that discharging current is abnormal), otherwise export non-abnormal discharge current detection signal.The voltage of described short-circuit detecting circuit 117 based on the 3rd test side VMI determines whether battery core Bat occurs short circuit; for example, when the voltage of the 3rd test side VMI (is greater than predefined short-circuit protection threshold value; in the time of 1V); its output short-circuit detection signal (short circuit appears in expression), otherwise export non-short-circuit detection signal.Described control circuit 118 is forbidden discharge control signal (discharge prevention signal) by described control of discharge end DO output when receiving abnormal discharge current detection signal and/or paradoxical discharge voltage detection signal and/or short-circuit detection signal (expression electric discharge is abnormal); otherwise, by described control of discharge end DO output, allow discharge control signal.This is forbidden discharge control signal and allows discharge control signal can be two kinds of logic states of a signal, such as, forbid that discharge control signal is low level, described permission discharge control signal is high level.
In summary; whether the charging that described battery protection unit 110 detects described battery core BAT based on the first test side VDD, the second test side VSS and the 3rd test side VM is abnormal; if abnormal; by its charging control end CO output, forbid charging control signal (being charge protection signal); if it is not abnormal; by its charging control end CO output, allow charging control signal, described charging comprises that charging overcurrent is abnormal and charging overvoltage is abnormal extremely.In like manner; whether the electric discharge that described battery protection unit 110 detects described battery core BAT based on the first test side VDD, the second test side VSS and the 3rd test side VM is abnormal; if abnormal; by its control of discharge end DO output, forbid discharge control signal (being discharge prevention signal); if it is not abnormal; by its control of discharge end DO output, allow discharge control signal, described electric discharge comprises it being that electric discharge overcurrent is abnormal, electric discharge overvoltage is abnormal and short circuit extremely.
Described switch combination circuit 120 is connected between the negative pole G and two power end VM of described battery core Bat, its according to described in forbid the charge circuit that charging control signal (being charge protection signal) cuts off described battery core BAT; Described in described switch combination circuit 120 bases, forbid the discharge loop that discharge control signal (being discharge prevention signal) cuts off described battery core BAT.
Described switch combination circuit 120 can adopt general switch combination in relevant battery charging and discharging path of the prior art, and it has a lot of implementations, can choose at random, and does not do particular determination in the utility model.In the embodiment shown in Figure 2, described switch combination circuit 120 comprises the first nmos pass transistor MN1 and the second nmos pass transistor MN2.The source electrode of described the first nmos pass transistor MN1 is connected with the negative pole G of described battery core BAT, and its grid is connected with described control of discharge end DO, and its drain electrode is connected with the drain electrode of described the second nmos pass transistor MN2; The grid of described the second nmos pass transistor MN2 is connected with described charging control end CO, its source electrode is connected with described second source end VM, and parasitism has diode (not shown) in nmos pass transistor MN1, in nmos pass transistor MN2, parasitism has diode (not shown).Described battery protection unit 110 can be realized battery core Bat is carried out to charge protection and discharge prevention by controlling the turn-on and turn-off of nmos pass transistor MN1, MN2.When normal condition, nmos pass transistor MN1, MN2 conducting is simultaneously controlled in described battery protection unit 110, now both chargeablely also can discharge.When charging generation is abnormal, nmos pass transistor MN2 cut-off is controlled in described battery protection unit 110, thereby has cut off charge circuit, but still can discharge.When electric discharge generation is abnormal, nmos pass transistor MN1 cut-off is controlled in described battery protection unit 110, thereby has cut off discharge loop, but still can charge.
It should be noted that; compared to Figure 1; battery protecting circuit in the utility model increases and has capacitor C 2 between the 3rd link VMI of battery protection unit 110 and the negative pole G of battery core Bat; this capacitor C 2 forms RC circuit 140 with resistance R 2; by this RC circuit 140, can improve the antistatic detection performance of battery protecting circuit, realize and when mobile phone is carried out to electrostatic test, do not occur the phenomenon of shutting down.Its reason is; in mobile phone electrostatic test; the positive voltage being formed at second source end VM place by accumulation of static electricity electric charge is added on RC circuit 140; generation is to the electric current of capacitor C 2 chargings; the voltage of capacitor C 2 is raise gradually by exponential law; thereby the voltage of controlling the 3rd link VMI is raise gradually by exponential law; the voltage that has postponed the 3rd link VMI rises to the time of described short-circuit protection threshold value, to realize in battery protection unit 110 described in mobile phone electrostatic test, can not measure short-circuit condition by flase drop.
The process of boosting (or being called transient process) due to general RC circuit, the numerical values recited that depends on resistance R and capacitor C, conventionally the product of resistance R and capacitor C is called time constant, with τ, represent, be τ=RC, time constant is larger, it is longer that RC circuit reaches time of stable state, transient process is also longer, therefore, in a preferred embodiment, the time constant that resistance R 2 in RC circuit 130 and capacitor C 2 forms in the time of should being greater than electrostatic test, cause the maximum length in time that second source end VM is positive voltage (such as, 200us), for example, resistance R 2 is got 2.2K ohm, capacitor C 2 is got 0.1uF, its RC product equals 220uS.
It should be noted that the existence due to RC circuit 140, can make the voltage of the 3rd link VMI rise to the time lengthening of the voltage of second source end VM, but this time expand is shorter, very little on the impact of other defencive functions of battery protecting circuit, can ignore.
In sum, the battery protecting circuit in the utility model comprises battery protection unit 110, switch combination circuit 120, resistance R 2 and capacitor C 2.Wherein, the 3rd test side VMI of described battery protection unit 110 is connected with described second source end VM by resistance R 2; Described the 3rd test side VMI is connected with the negative pole G of battery core BAT by described capacitor C 2.This capacitor C 2 forms RC circuit 130 with resistance R 2; in mobile phone electrostatic test; the voltage that described RC circuit 140 has postponed the 3rd link VMI rises to the time of described short-circuit protection threshold value; prevent described battery protection unit 110 false triggering short-circuit protections, thereby realize the phenomenon that do not occur shutting down when mobile phone is carried out to electrostatic test, realize.
In the utility model, " connection ", be connected, word that the expression such as " company ", " connecing " is electrical connected, if no special instructions, represent direct or indirect electric connection.
It is pointed out that being familiar with any change that person skilled in art does embodiment of the present utility model does not all depart from the scope of claims of the present utility model.Correspondingly, the scope of claim of the present utility model is also not limited only to previous embodiment.
Claims (7)
1. a battery protecting circuit, is characterized in that, it comprises battery protection unit, switch combination circuit, the first electric capacity and the first resistance,
Described battery protecting circuit comprises and anodal the first test side being connected of battery core, the second test side being connected with battery core negative pole, the 3rd test side being connected with second source end, charging control end and control of discharge end, described battery protecting circuit detects the charging and discharging circuit of battery core based on the first test side, the second test side and the 3rd test side, with when charging is abnormal, by described charging control end output charge protection signal, when electric discharge is abnormal, by described control of discharge end output discharge prevention signal;
Described switch combination circuit is connected between described battery core negative pole and second source end, and it is according to the charge circuit of battery core described in described charge protection signal cut, according to the discharge loop of battery core described in described discharge prevention signal cut;
The positive pole of described battery core is connected with the first power end, and described the first resistance is connected between second source end and the 3rd test side, and described electric capacity is connected between described the 3rd test side and the negative pole of described battery core.
2. battery protecting circuit according to claim 1, is characterized in that,
The product of the resistance value of the first resistance and the first electric capacity is greater than and in mobile phone electrostatic test, causes the maximum length in time that second source end VM is positive voltage.
3. battery protecting circuit according to claim 2, is characterized in that, described the first resistance equals 2.2K ohm, and described the first electric capacity equals 0.1uF.
4. battery protecting circuit according to claim 2, is characterized in that,
Described charging comprises that charging overcurrent is abnormal and charging overvoltage is abnormal extremely, and described electric discharge comprises it being that electric discharge overcurrent is abnormal, electric discharge overvoltage is abnormal and short circuit extremely,
Whether the charging voltage of the voltage detecting battery core Bat of described battery protecting circuit based on the first test side VDD and the second test side VSS is abnormal, and whether the charging current that its voltage based on the 3rd test side detects battery core is abnormal;
Whether the discharge voltage of the voltage detecting battery core Bat of described battery protecting circuit based on the first test side VDD and the second test side VSS is abnormal; whether its voltage based on the 3rd test side detects the discharging current of battery core abnormal, and its voltage based on the 3rd test side detects battery core and whether occurs short circuit.
5. battery protecting circuit according to claim 4, is characterized in that,
Described switch combination circuit comprises the first nmos pass transistor and the second nmos pass transistor,
The source electrode of described the first nmos pass transistor is connected with the negative pole of described battery core, its grid is connected with described control of discharge end, its drain electrode is connected with the drain electrode of described the second nmos pass transistor, the grid of described the second nmos pass transistor is connected with described charging control end, and its source electrode is connected with described second source end.
6. battery protecting circuit according to claim 5, is characterized in that, when charging generation is abnormal, described battery protecting circuit is controlled the second nmos pass transistor cut-off, to cut off charge circuit; When electric discharge generation is abnormal, described battery protecting circuit is controlled the first nmos pass transistor cut-off, to cut off discharge loop.
7. battery protecting circuit according to claim 1, is characterized in that, described the first test side is connected with the positive pole of described battery core by the second resistance, and described the first test side is connected with described the second test side by the second electric capacity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320640459.9U CN203522159U (en) | 2013-10-17 | 2013-10-17 | Cell protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320640459.9U CN203522159U (en) | 2013-10-17 | 2013-10-17 | Cell protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN203522159U true CN203522159U (en) | 2014-04-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320640459.9U Withdrawn - After Issue CN203522159U (en) | 2013-10-17 | 2013-10-17 | Cell protection circuit |
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| CN (1) | CN203522159U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532104A (en) * | 2013-10-17 | 2014-01-22 | 无锡中星微电子有限公司 | Battery protection circuit |
| CN104967156A (en) * | 2015-06-08 | 2015-10-07 | 惠州Tcl移动通信有限公司 | System capable of releasing overcurrent protection state of battery |
| CN104993459A (en) * | 2015-07-28 | 2015-10-21 | 无锡中星微电子有限公司 | Cell protecting chip and cell |
| CN113270853A (en) * | 2018-12-21 | 2021-08-17 | 荣耀终端有限公司 | Battery protection circuit, battery protection board, battery and terminal equipment |
-
2013
- 2013-10-17 CN CN201320640459.9U patent/CN203522159U/en not_active Withdrawn - After Issue
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103532104A (en) * | 2013-10-17 | 2014-01-22 | 无锡中星微电子有限公司 | Battery protection circuit |
| CN103532104B (en) * | 2013-10-17 | 2016-06-01 | 无锡中感微电子股份有限公司 | A kind of battery protecting circuit |
| CN104967156A (en) * | 2015-06-08 | 2015-10-07 | 惠州Tcl移动通信有限公司 | System capable of releasing overcurrent protection state of battery |
| CN104967156B (en) * | 2015-06-08 | 2019-08-09 | 惠州Tcl移动通信有限公司 | The system that the overcurrent protection state of battery can be released |
| CN104993459A (en) * | 2015-07-28 | 2015-10-21 | 无锡中星微电子有限公司 | Cell protecting chip and cell |
| CN104993459B (en) * | 2015-07-28 | 2018-01-30 | 无锡中感微电子股份有限公司 | Battery protection chip and battery |
| CN113270853A (en) * | 2018-12-21 | 2021-08-17 | 荣耀终端有限公司 | Battery protection circuit, battery protection board, battery and terminal equipment |
| US11962143B2 (en) | 2018-12-21 | 2024-04-16 | Honor Device Co., Ltd. | Battery protection circuit, battery protection board, battery, and terminal device |
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