CN101478169A - Lithium battery pre-alarm protection apparatus and method thereof - Google Patents
Lithium battery pre-alarm protection apparatus and method thereof Download PDFInfo
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- CN101478169A CN101478169A CNA2008100018103A CN200810001810A CN101478169A CN 101478169 A CN101478169 A CN 101478169A CN A2008100018103 A CNA2008100018103 A CN A2008100018103A CN 200810001810 A CN200810001810 A CN 200810001810A CN 101478169 A CN101478169 A CN 101478169A
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Abstract
The invention relates to a lithium battery pre-warning protection device and a method thereof, which is suitable for a lithium battery pack with a plurality of single cells connected in series. The pre-warning protection device comprises a voltage balancing controller used for detecting the terminal voltage of each single cell and balancing and correcting the terminal voltage of each single cell; a protective element connected with a lithium battery in series; a microprocessor is connected to the voltage balancing controller and the protective element; and a charging circuit used for receiving the terminal voltage of each single cell and calculating the charging voltage difference between the maximum terminal voltage and the minimum terminal voltage and used for balancing and correcting the terminal voltage of the single cells and generating the warning signal or cutting the lithium battery pack off according to the comparative result of the charging voltage difference and the internal multi-voltage critical value.
Description
Technical field
The present invention relates to a kind of lithium battery pre-alarm protection apparatus and method thereof, refer to especially a kind ofly cooperate running with software program, so that the device and method of lithium battery pre-alarm protection to be provided by hardware circuit.
Background technology
Lithium battery is because of the restriction of material characteristic, and its charging voltage generally must not surpass 4.2V/cell, otherwise will greatly reduce useful life, and is too many if charging voltage surpasses simultaneously, and lithium battery has the danger existence of burning or blast.In addition, the discharge voltage of lithium battery generally must not be lower than 2.7V/cell, otherwise can't reply charging.
Therefore, the lithium battery group can install the traditional protection device additional usually on using, so that the protection of lithium battery group to be provided.Please refer to Fig. 1, be the circuit box schematic diagram of traditional protection device.Traditional protection device 1 is made up of a heat sensor 10, a thermal fuse 11, a charging control switch 12, a discharge control switch 13, a short-circuit protector 14 and a central microprocessor 15.Wherein, heat sensor 10 is used for detecting the abnormal temperature that lithium battery group 2 is produced when charge/discharge.11 of thermal fuse are to open circuit when overheated, damage lithium battery group 2 to avoid high temperature.Charging control switch 12 and discharge control switch 13 are switched in central microprocessor 15 controls, in order to lithium battery group 2 is carried out the charge or discharge operation.14 of short-circuit protectors provide the circuit protection effect when producing short circuit phenomenon.
Cooperate Fig. 1 again, please refer to Fig. 2, for the charging voltage of traditional lithium battery is distributed schematic diagram.When charger 5a charged to lithium battery group 2, each battery cell 21,22,23 in the charging can be subjected to the influence of different internal resistance values, and causes the inconsistent phenomenon of terminal voltage dividing potential drop of each battery cell 21,22,23.At this moment, traditional protection device 1 will be made protection at the battery cell that reaches the upper voltage limit value at first, and then the lithium battery group 2 of integral body is stopped charging, and allows other battery cell that does not reach the upper voltage limit value can't charge saturated.As shown in Figure 2, the magnitude of voltage V1 of battery cell 21 is 4.35V, and the magnitude of voltage V2 of battery cell 22 is 4.15V, and the magnitude of voltage V3 of battery cell 23 is 4.1V, and the charging voltage Vt that charger 5a provides is 12.6V.
In addition; the situation of lithium battery group 2 when discharge is just in time opposite with charging; traditional protection device 1 will be made protection at the battery cell that reaches the lower voltage limit value at first, and then the lithium battery group 2 of integral body is stopped charging, and other battery cell that does not reach the lower voltage limit value can't be discharged fully.
So; when using traditional protection device 1 as the protection of lithium battery group 2; will produce the accumulated interference effect of going round and beginning again; make lithium battery group 2 when charging, the excessive situation of some battery cell generation charging voltage, and cause burning or exploding; perhaps; when discharge, the low excessively situation of some battery cell generation discharge voltage, and cause its capacity can't reply and can't recharge.
Summary of the invention
In view of this, the invention provides a kind of lithium battery pre-alarm protection apparatus and method thereof, utilize hardware circuit to cooperate running with software program, to avoid the lithium battery group in charging process, to be burnt or injury such as blast takes place because of the accumulated interference effect caused.
Lithium battery pre-alarm protection apparatus of the present invention is applicable to that one has the lithium battery group of several series-connected cell monomers, and it includes a balance of voltage controller, a protection component and a microprocessor.Wherein, balance of voltage controller connects the lithium battery group, in order to detecting the terminal voltage of each battery cell, and the terminal voltage of each battery cell of balance.Protection component is serially connected with the lithium battery group.Microprocessor is connected in balance of voltage controller and protection component; this microprocessor receives the terminal voltage of each battery cell; and a charging voltage that calculates maximum terminal voltage and smallest end voltage is poor; simultaneously; this microprocessor is according to the comparative result of charging voltage difference and multivoltage difference critical value, in order to control balance of voltage controller action, produce an alarm signal or to control this protection component action.
Lithium battery pre-alarm guard method of the present invention is applicable to that one has the lithium battery group of several series-connected cell monomers; its step includes: a. at first; judge in the lithium battery group; whether the maximum terminal voltage of battery cell and the charging voltage difference of smallest end voltage be greater than one first voltage difference critical value; if greater than the first voltage difference critical value; then carry out the balance correction of the terminal voltage of battery cell, opposite, then keep the lithium battery group and charge normally.Then, b. after the balance correction of the terminal voltage of battery cell, judge again in the lithium battery group, whether the maximum terminal voltage of battery cell and the charging voltage difference of smallest end voltage be greater than one second voltage difference critical value, if greater than the second voltage difference critical value, the output of one alarm signal then is provided, opposite, then carry out the balance correction of the terminal voltage of battery cell.C. last, judge that whether the maximum terminal voltage of battery cell and the charging voltage difference of smallest end voltage are greater than a tertiary voltage difference critical value in the lithium battery group, if greater than tertiary voltage difference critical value, then cut off the charge circuit of lithium battery group, opposite, then get back to step a.
Lithium battery pre-alarm protection apparatus provided by the invention and method thereof utilize microprocessor to receive the terminal voltage of arbitrary battery cell, and it is poor to calculate a charging voltage of maximum terminal voltage and smallest end voltage.Moreover, microprocessor according to charging voltage difference control balance of voltage controller action with the terminal voltage of balance correction battery cell or produce alarm signal, also or the action of control protection component to cut off the charge circuit of lithium battery group.So, the present invention can avoid the lithium battery group to burn because of the accumulated interference effect caused in charging process or injury such as blast takes place.
Above general introduction and ensuing detailed description are all exemplary in nature, are in order to further specify protection scope of the present invention.And about other purpose of the present invention and advantage, will be set forth in follow-up explanation and accompanying drawing.
Description of drawings
Fig. 1 is the circuit box schematic diagram of traditional protection device;
Fig. 2 is that the charging voltage of traditional lithium battery is distributed schematic diagram;
Fig. 3 is the circuit box schematic diagram of lithium battery pre-alarm protection apparatus of the present invention; And
Fig. 4 is an operating process schematic diagram of the present invention.
[main element description of reference numerals]
[known]
Short-circuit protector 14
Battery cell 21,22,23
Charger 5a
[the present invention]
Lithium battery pre-alarm protection apparatus 3
Balance of voltage controller 30
Additives for overcharge protection switch Q1
Over switch Q2
Protection switch Q3
Load detecting resistance R 1
Alarm signal S1
Embodiment
Please refer to Fig. 3, be the circuit box schematic diagram of lithium battery pre-alarm protection apparatus of the present invention.Lithium battery pre-alarm protection apparatus 3 is applicable to that one has the lithium battery group 4 of several series-connected cell monomers 41,42,43; wherein, lithium battery pre-alarm protection apparatus 3 includes a balance of voltage controller 30, a protection component 32, an additives for overcharge protection switch Q1, an over switch Q2, a protection switch Q3 and a microprocessor 34.
Wherein, protection component 32, additives for overcharge protection switch Q1 and over switch Q2 and lithium battery group 4 form and are connected in series; and during normal use; charger 5 charges to lithium battery group 4 through protection component 32, additives for overcharge protection switch Q1 and over switch Q2; in addition, lithium battery group 4 also can be passed through protection component 32, additives for overcharge protection switch Q1 and over switch Q2 and load 6 is discharged.Simultaneously; additives for overcharge protection switch Q1 enters under the situation that lithium battery group 4 overcharges by (turn off); in order to reach the protection requirement that lithium battery group 4 overcharges; and; over switch Q2 enters under the situation of lithium battery group 4 over-discharge can by (turn off), in order to reach the protection requirement of lithium battery group 4 over-discharge can.
Again with reference to figure 3; balance of voltage controller 30 connects lithium battery group 4, additives for overcharge protection switch Q1 and over switch Q2; the terminal voltage of each battery cell 41,42,43 in the balance of voltage controller 30 detection of dynamic lithium battery groups 4, and the balance of controlling each battery cell 41,42,43 terminal voltage.Wherein, when the terminal voltage of one of battery cell 41,42,43 was excessive, balance of voltage controller 30 promptly drove additives for overcharge protection switch Q1 and enters by (turn off), reaches the protection requirement that lithium battery group 4 overcharges.In addition, cross when low when the terminal voltage of one of battery cell 41,42,43, balance of voltage controller 30 promptly drives over switch Q2 and enters by (turn off), reaches the protection requirement of lithium battery group 4 over-discharge can.
Again with reference to figure 3; microprocessor 34 is connected in balance of voltage controller 30 and protection switch Q3; simultaneously, microprocessor 34 is preset with one first voltage difference critical value Vth1, one second voltage difference critical value Vth2, a tertiary voltage difference critical value Vth3 and a charge threshold level Vth.This microprocessor 34 dynamically receives the terminal voltage of each battery cell 41,42,43 from balance of voltage controller 30, and judges whether the terminal voltage of each battery cell 41,42,43 surpasses default charge threshold level Vth.If do not surpass, then battery cell 41,42,43 continues to accept charger 5 chargings.If the terminal voltage of arbitrary battery cell 41,42,43 surpasses default charge threshold level Vth, then a maximum terminal voltage Vmax in the microprocessor 34 beginning counting cell monomers 41,42,43 and the charging voltage difference Δ V of smallest end voltage Vmin.
Again with reference to figure 3, after microprocessor 34 calculates charging voltage difference Δ V, i.e. comparison operation this charging voltage difference Δ V and the first voltage difference critical value Vth1 are through comparative result, if charging voltage difference Δ V is less than the first voltage difference critical value Vth1, then charging circuit charges normal lithium battery group 4.Opposite, through comparative result, if charging voltage difference Δ V greater than the first voltage difference critical value Vth1, then microprocessor 34 control balance of voltage controllers 30 actions, in order to the terminal voltage of each battery cell 41,42,43 of balance correction, make it reach the requirement of balance.
After 30 actions of aforesaid voltage balance controller, microprocessor 34 can dynamically receive the terminal voltage of each battery cell 41,42,43 once more, and calculate charging voltage difference Δ V, follow the comparison operation charging voltage difference Δ V and the second voltage difference critical value Vth2, through comparative result, if charging voltage difference Δ V is less than the second voltage difference critical value Vth2, then microprocessor 34 is controlled 30 actions of balance of voltage controller once more, in order to the terminal voltage of each battery cell 41,42,43 of balance correction, make it reach the requirement of balance.Opposite, through comparative result, if charging voltage difference Δ V greater than the second voltage difference critical value Vth2, then microprocessor 34 produces alarm signal S1 output, with warning user lithium battery group 4 state at stake.
When microprocessor 34 produces alarm signal S1 output, microprocessor 34 dynamically receives the terminal voltage of each battery cell 41,42,43 once more, and calculate charging voltage difference Δ V, follow comparison operation charging voltage difference Δ V and tertiary voltage difference critical value Vth3, through comparative result, if charging voltage difference Δ V is less than tertiary voltage difference critical value Vth3, microprocessor 34 difference of the comparison operation charging voltage once more Δ V and the first voltage difference critical value Vth1 again then.Opposite, through comparative result, if charging voltage difference Δ V is greater than tertiary voltage difference critical value Vth3; then microprocessor 34 is promptly controlled protection switch Q3 conducting (turn on); in order to blow protection component 32, to reach the protection of lithium battery group 4, this protection component 32 can be a fuse.
Again with reference to figure 3; lithium battery pre-alarm protection apparatus 3 further comprises a temperature detector 33; temperature detector 33 is connected in microprocessor 34; and be set at the surrounding enviroment of lithium battery group 4; in order to detect the peripheral temperature of lithium battery group 4; and temperature data is delivered to microprocessor 34, carry out the protection of temperature anomaly so that 34 pairs of lithium battery groups of microprocessor 4 to be provided.In addition, lithium battery pre-alarm protection apparatus 3 further comprises a resistance R 2, and resistance R 2 connects microprocessor 34.Resistance R 2 provides the adjustment of the first voltage difference critical value Vth1, the second voltage difference critical value Vth2 and tertiary voltage difference critical value Vth3 according to the difference of different vendor's battery.In addition; lithium battery pre-alarm protection apparatus 3 further comprises load detecting resistance R 1; load detecting resistance R 1 is connected in series in lithium battery group 4; the size of current of lithium battery group 4 is flow through in detecting; and will detect the result and deliver to microprocessor 34, so that being provided, 34 pairs of lithium battery groups of microprocessor 4 carry out the protection of overcurrent.
Again with reference to figure 3; microprocessor 34 in the lithium battery pre-alarm protection apparatus 3 is obtained the terminal voltage of arbitrary battery cell 41,42,43 in the lithium battery group 4 by balance of voltage controller 30; and after the terminal voltage of each battery cell 41,42,43 surpasses critical voltage value Vth, begin to carry out the early warning protection operation of lithium battery group 4.In early warning protection operation; microprocessor 34 is calculated maximum terminal voltage Vmax in each battery cell 41,42,43 and the charging voltage difference Δ V of smallest end voltage Vmin; then, charging voltage difference Δ V compares the first voltage difference critical value Vth1, the second voltage difference critical value Vth2 and tertiary voltage difference critical value Vth3 in regular turn.Wherein, as charging voltage difference Δ V during greater than the first voltage difference critical value Vth1,30 actions of microprocessor 34 control balance of voltage controllers are in order to the terminal voltage of each battery cell 41,42,43 of balance correction.After the balance correction, if charging voltage difference Δ V greater than the second voltage difference critical value Vth2, then microprocessor 34 provides alarm signal S1 to main frame (indicate).Simultaneously, if charging voltage difference Δ V greater than tertiary voltage difference critical value Vth2, the microprocessor 34 control charge circuit that cuts off lithium battery groups 4 then is to carry out the early warning protection to it.
Cooperate Fig. 3,, be operating process schematic diagram of the present invention with reference to figure 4.As shown in Figure 4, lithium battery group 4 is initially located in the situation of charging normal, and is step S10, and the battery cell 41,42,43 in the lithium battery group 4 begins to set up voltage at this moment.Then; carry out the judgement of battery cell 41,42,43 terminal voltage sizes; be step S11; at this moment; if terminal voltage is less than critical voltage value Vth, then battery cell 41,42,43 is proceeded to charge normal to set up voltage, and is opposite; if the terminal voltage of arbitrary battery is greater than critical voltage value Vth, lithium battery pre-alarm guard method then of the present invention begins operation.
At first, judge in the lithium battery group 4, whether the charging voltage difference Δ V of the maximum terminal voltage Vmax of battery cell and smallest end voltage Vmin is greater than the first voltage difference critical value Vth1, be step S12, if charging voltage difference Δ V greater than the first voltage difference critical value Vth1, then carries out the balance correction of each battery cell 41,42,43 terminal voltage, be step S14, if not lithium battery group 4 is kept and charged normal action, be step S10.Then, judge in the lithium battery group 4, whether the charging voltage difference Δ V of the maximum terminal voltage Vmax of battery cell and smallest end voltage Vmin is greater than the second voltage difference critical value Vth2, if charging voltage difference Δ V is greater than the second voltage difference critical value Vth2, safety alarm then is provided, is step S18, if not, then carry out the balance correction of the terminal voltage of each battery cell 41,42,43, be step S14.
Before safety alarm step S18 is provided, can calculate the number of times of charging voltage difference Δ V earlier greater than the second voltage difference critical value Vth2, be step S16.Then, judge that whether number of times surpasses a critical number of times T, is step S17, wherein, if number of times is no more than critical number of times T, then carry out the balance correction of the terminal voltage of each battery cell 41,42,43, be step S14, if number of times surpasses critical number of times T, safety alarm then is provided, be step S18.
Simultaneously, behind the step S17, judge next in the lithium battery group 4 that whether the charging voltage difference Δ V of the maximum terminal voltage Vmax of battery cell and smallest end voltage Vmin is step S19 greater than tertiary voltage difference critical value Vth3.If charging voltage difference Δ V is greater than tertiary voltage difference critical value Vth3, the charge circuit that then cuts off lithium battery group 4 is step S20, it is carried out the early warning protection.If not, then come back to step S12, again judge that whether charging voltage difference Δ V is greater than the first voltage difference critical value Vth1.
In sum, lithium battery pre-alarm protection apparatus provided by the invention and method thereof utilize microprocessor to receive the terminal voltage of each battery cell, and it is poor to calculate in the battery cell charging voltage of maximum terminal voltage and smallest end voltage.And then microprocessor is according to the comparison operation of this charging voltage difference and internal electrical pressure reduction critical value, in order to the terminal voltage of balance correction battery cell or produce alarm signal, also or the charge circuit that cuts off the lithium battery group.So, the present invention can avoid the lithium battery group to burn because of the accumulated interference effect caused in charging process or injury such as blast takes place, and then effectively improves the shortcoming of traditional protection device.
The above only is the specific embodiment of the best of the present invention, but feature of the present invention is not limited thereto, any those skilled in the art in the field of the invention, can think easily and variation or modification, all can be encompassed within the protection range of this case.
Claims (19)
1. a lithium battery pre-alarm protection apparatus is characterized in that, is applicable to that one has the lithium battery group of several series-connected cell monomers, includes:
One balance of voltage controller connects this lithium battery group, and this balance of voltage controller is in order to detecting the terminal voltage of each battery cell, and the terminal voltage of each battery cell of balance;
One protection component is serially connected with this lithium battery group; And
One microprocessor; be connected in this balance of voltage controller and this protection component; this microprocessor receives the terminal voltage of each battery cell; and a charging voltage that calculates maximum terminal voltage and smallest end voltage is poor; this microprocessor is according to the comparative result of this charging voltage difference and multivoltage difference critical value, in order to control this balance of voltage controller action, produce an alarm signal or to control this protection component action.
2. lithium battery pre-alarm protection apparatus as claimed in claim 1; it is characterized in that; further comprise a protection switch, this protection switch is connected in this microprocessor and this protection component, and wherein this microprocessor is controlled this protection switch in order to drive this protection component action.
3. lithium battery pre-alarm protection apparatus as claimed in claim 2 is characterized in that, this protection component is a fuse.
4. lithium battery pre-alarm protection apparatus as claimed in claim 2; it is characterized in that further comprise an additives for overcharge protection switch, this additives for overcharge protection switch series is connected to this lithium battery group; and be controlled by this balance of voltage controller, in order to this protection that lithium battery group overcharges to be provided.
5. lithium battery pre-alarm protection apparatus as claimed in claim 4; it is characterized in that further comprise an over switch, this over switch series is connected to this lithium battery group; and be controlled by this balance of voltage controller, in order to the protection of this lithium battery group over-discharge can be provided.
6. lithium battery pre-alarm protection apparatus as claimed in claim 2 is characterized in that, this multivoltage difference critical value includes one first voltage difference critical value, one second voltage difference critical value and a tertiary voltage difference critical value.
7. lithium battery pre-alarm protection apparatus as claimed in claim 6 is characterized in that, when this voltage difference during greater than the first voltage difference critical value, this microprocessor is controlled this balance of voltage controller action, with the terminal voltage of each battery cell of balance.
8. lithium battery pre-alarm protection apparatus as claimed in claim 6 is characterized in that, when this voltage difference during greater than the second voltage difference critical value, this microprocessor is exported this alarm signal.
9. lithium battery pre-alarm protection apparatus as claimed in claim 6 is characterized in that, when this voltage difference during greater than tertiary voltage difference critical value, this microprocessor is controlled this protection component action.
10. lithium battery pre-alarm protection apparatus as claimed in claim 2 is characterized in that, this microprocessor is by a temperature detector, in order to detecting the peripheral temperature of this lithium battery group, and provides the protection of this lithium battery group temperature anomaly.
11. lithium battery pre-alarm protection apparatus as claimed in claim 6 is characterized in that, further comprises a resistance, this resistance connects this microprocessor, and the adjustment of this first voltage difference critical value, this second voltage difference critical value and this tertiary voltage difference critical value is provided.
12. lithium battery pre-alarm protection apparatus as claimed in claim 6 is characterized in that, this microprocessor is detected the electric current of lithium battery group by load detecting resistance, and the protection of lithium battery group overcurrent is provided.
13. a lithium battery pre-alarm guard method is characterized in that, is applicable to that one has the lithium battery group of several series-connected cell monomers, includes:
A. judge in the lithium battery group that whether the maximum terminal voltage of battery cell and the charging voltage difference of smallest end voltage are greater than one first voltage difference critical value, if then carry out the balance correction of the terminal voltage of each battery cell;
B. judge in the lithium battery group that whether the maximum terminal voltage of battery cell and the charging voltage difference of smallest end voltage are greater than one second voltage difference critical value, if safety alarm then is provided; And
C. judge in the lithium battery group that whether the maximum terminal voltage of battery cell and the charging voltage difference of smallest end voltage are greater than a tertiary voltage difference critical value, if, the charge circuit that then cuts off the lithium battery group.
14. lithium battery pre-alarm guard method as claimed in claim 13; it is characterized in that; before step a; comprise that further one judges whether the terminal voltage of each battery cell surpasses the step of a charge threshold level; wherein, judge, then each battery cell is charged if nothing surpasses; if judge to surpass, then carry out step a.
15. lithium battery pre-alarm guard method as claimed in claim 14 is characterized in that, in step a, if the charging voltage difference is not greater than this first voltage difference critical value, then each battery cell is kept the charging action.
16. lithium battery pre-alarm guard method as claimed in claim 14 is characterized in that, in step b, if the charging voltage difference is not greater than this second voltage difference critical value, then proceeds the balance correction of the terminal voltage of each battery cell.
17. lithium battery pre-alarm guard method as claimed in claim 14 is characterized in that, behind step b, further comprises the number of times of this charging voltage difference of counting greater than this second voltage difference critical value.
18. lithium battery pre-alarm guard method as claimed in claim 17; it is characterized in that; after the number of times step of this charging voltage difference of counting greater than this second voltage difference critical value; comprise that further one judges whether this number of times surpasses the step of a critical number of times; wherein, if be no more than, then carry out the balance correction of the terminal voltage of each battery cell; if surpass, then provide safety alarm.
19. lithium battery pre-alarm guard method as claimed in claim 14 is characterized in that, in step c, if the charging voltage difference is not greater than this tertiary voltage difference critical value, then carries out step a.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2008100018103A CN101478169A (en) | 2008-01-03 | 2008-01-03 | Lithium battery pre-alarm protection apparatus and method thereof |
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| CNA2008100018103A CN101478169A (en) | 2008-01-03 | 2008-01-03 | Lithium battery pre-alarm protection apparatus and method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187715A (en) * | 2011-12-27 | 2013-07-03 | 三星Sdi株式会社 | Battery protection circuit |
| CN103645444A (en) * | 2013-12-23 | 2014-03-19 | 中国科学院电工研究所 | Mode principle based battery consistency online evaluation method and detection circuit |
| CN104882857A (en) * | 2015-06-18 | 2015-09-02 | 安徽朗越环境工程有限公司 | Protection circuit and protection method for safe charging of lithium battery by lithium-ion solar street lamp |
| CN109334513A (en) * | 2018-11-23 | 2019-02-15 | 深圳市欧科力科技有限公司 | A kind of charging and discharging lithium battery management system |
| CN111541226A (en) * | 2020-05-11 | 2020-08-14 | 上海空间电源研究所 | Overcharge-preventing control method for lithium ion storage battery for space |
| CN112782611A (en) * | 2019-11-05 | 2021-05-11 | 奥特润株式会社 | BMS semiconductor device with leakage current detection function and detection method |
-
2008
- 2008-01-03 CN CNA2008100018103A patent/CN101478169A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103187715A (en) * | 2011-12-27 | 2013-07-03 | 三星Sdi株式会社 | Battery protection circuit |
| CN103187715B (en) * | 2011-12-27 | 2018-06-22 | 三星Sdi株式会社 | Battery protecting circuit |
| CN103645444A (en) * | 2013-12-23 | 2014-03-19 | 中国科学院电工研究所 | Mode principle based battery consistency online evaluation method and detection circuit |
| CN104882857A (en) * | 2015-06-18 | 2015-09-02 | 安徽朗越环境工程有限公司 | Protection circuit and protection method for safe charging of lithium battery by lithium-ion solar street lamp |
| CN109334513A (en) * | 2018-11-23 | 2019-02-15 | 深圳市欧科力科技有限公司 | A kind of charging and discharging lithium battery management system |
| CN112782611A (en) * | 2019-11-05 | 2021-05-11 | 奥特润株式会社 | BMS semiconductor device with leakage current detection function and detection method |
| CN111541226A (en) * | 2020-05-11 | 2020-08-14 | 上海空间电源研究所 | Overcharge-preventing control method for lithium ion storage battery for space |
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Open date: 20090708 |