CN202333775U - Battery protective circuit of power lithium battery pack - Google Patents
Battery protective circuit of power lithium battery pack Download PDFInfo
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- CN202333775U CN202333775U CN2011204751073U CN201120475107U CN202333775U CN 202333775 U CN202333775 U CN 202333775U CN 2011204751073 U CN2011204751073 U CN 2011204751073U CN 201120475107 U CN201120475107 U CN 201120475107U CN 202333775 U CN202333775 U CN 202333775U
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Abstract
The utility model relates to a battery protective circuit of a power lithium battery pack, which comprises the power lithium battery pack, a power supply circuit, a protective plate circuit and an over current detection circuit, wherein the power supply circuit is connected with the power lithium battery pack, and stabilizes the voltage of the power lithium battery pack into output voltage Vup for powering the protective plate circuit and the over current detection circuit; the input end of the over current detection circuit is electrically connected to the detection end of the power lithium battery pack; the detection signal output end of the over current detection circuit is electrically connected to the detection signal input end of the protective plate circuit; the power supply circuit is a voltage follower circuit formed by a voltage stabilizer unit and triodes; the voltage follower circuit is particularly formed by a voltage-stabilizing diode or an adjustable precise parallel voltage stabilizer and the triodes; and the over current detection circuit operates by adopting a voltage-stabilizing chip HT7130, a voltage-stabilizing IC chip S8261ACEMD and a resistor with a high precision and low temperature coefficient. The battery protective circuit provided by the utility model is used for the power supply and the over current detection of the power lithium battery pack.
Description
Technical field
The utility model relates to a kind of battery protecting circuit of dynamic lithium battery group, relates in particular to a kind of power supply power supply of dynamic lithium battery group and interlock circuit of over-current detection of being used for.
Background technology
The dynamic lithium battery group is the novel high-energy battery of succeeding in developing in 20th century; Get into practicability the seventies; Because of it has advantages such as energy height, cell voltage is high, operating temperature range is wide, storage life is long; Be widely used in the military and civilian compact electric apparatus, like mobile phone, portable computer, video camera, camera etc., part has replaced conventional batteries.
The power supply of working power lithium battery group power supply in the market is the mode that adopts the preceding four batteries power takings of battery pack.Circuit is simple though this way to take power has, low cost and other advantages; But this way to take power has following shortcoming: owing to receive the influence of preceding four batteries voltages; Can cause mains ripple big (16V under for example from the 8V under the battery over-discharge state to the over-charging of battery electricity condition); And under the situation of the overcharging of battery, overdischarge; Want preceding four batteries power consumptions to go driving to discharge and recharge metal-oxide-semiconductor, can aggravate the battery inconsistency through accumulating for a long time like this, have a strong impact on the capacity of battery.
In addition; Total negative pole B-that the over-current detection of dynamic lithium battery group generally adopts triode to detect battery detects the resistance between the constantan and then tested flow valuve to the internal resistance between the negative pole P-of power brick or through employing first segment battery detecting chip; This dual mode though implementation is simple, promptly uses simple transistor drive circuit just can realize; But has following shortcoming: if the detection mode of overcurrent detects the mode of total negative pole B-of battery to the internal resistance between the negative pole P-of power brick with triode; Because metal-oxide-semiconductor is in different temperatures, internal resistance has bigger fluctuation under the situation of different electric currents, can cause the deviation of overcurrent precision very big; And if the battery detecting chip of employing first segment detects the resistance between the constantan and then tested flow valuve; Owing to directly receive the total negative of battery pack, as the negative pole of the B0 of first segment, like this when having electric current to pass through through discharge lines; Will produce certain pressure drop on the line; Under the situation that the resistance of very long or line is big in discharge lines, can seriously influence the super-charge super-discharge value of first segment, and cause the situation of erroneous detection.
The utility model content
The utility model technical problem to be solved is; A kind of battery protecting circuit of dynamic lithium battery group is proposed; Power supply power supply and over-current detection circuit to the dynamic lithium battery group improve, to solve deficiency and the defective that exists in existing preceding four batteries ways to take power and the over-current detection mode.
In order to solve the problems of the technologies described above; The technical scheme that the utility model adopts is: a kind of battery protecting circuit of dynamic lithium battery group; Comprise dynamic lithium battery group, power-supplying circuit, baffle circuit, over-current detection circuit; Said power-supplying circuit is connected in the dynamic lithium battery group; And the voltage voltage stabilizing of dynamic lithium battery group is become output voltage V up is baffle circuit and over-current detection circuit power supply; The input of said over-current detection circuit is electrically connected on the test side of dynamic lithium battery group, and the detection signal output of over-current detection circuit is electrically connected on the detection signal input of baffle circuit, and said power-supplying circuit is the voltage follower circuit that is made up of regulator unit and triode.
Wherein, Said voltage follower circuit is specifically: be made up of voltage stabilizing didoe Z1, triode Q10, resistance R 173, resistance R 174, resistance R 175, capacitor C 3, capacitor C 5; The output of total anodal B+ of battery connects resistance R 173 and resistance R 174 1 ends; The other end of resistance R 173 connects the collector electrode of triode Q10; The other end of resistance R 174 connects an end, the negative pole of voltage stabilizing didoe Z1, an end of resistance R 175 and the base stage of triode Q10 of capacitor C 5; The other end ground connection of the positive pole of the other end of capacitor C 5, voltage stabilizing didoe Z1 and resistance R 175, the emitter of triode Q10 connects an end and the output voltage V up of capacitor C 3, the other end ground connection of capacitor C 3.
Further; Said voltage follower circuit is specifically: be made up of adjustable accurate shunt regulator Q11, triode Q12, resistance R 1, resistance R 2, resistance R 3, resistance R 4, capacitor C 4; The output of total anodal B+ of battery connects an end of resistance R 3 and resistance R 4; The other end of resistance R 3 connects the collector electrode of triode Q12; The other end of resistance R 4 connects an end, the negative electrode of adjustable accurate shunt regulator Q11 and the base stage of triode Q12 of capacitor C 4, the plus earth of the other end of capacitor C 4 and adjustable accurate shunt regulator Q11, and the reference edge of adjustable accurate shunt regulator Q11 connects an end of resistance R 1 and an end of resistance R 2; The other end ground connection of resistance R 2, the other end of resistance R 1 connects emitter and the output voltage V up of triode Q12.
Further, the model of adjustable accurate shunt regulator Q11 is APL431.
The battery protecting circuit of said dynamic lithium battery group; Its over-current detection circuit comprises negative pole P-, total negative pole B-of battery, output voltage V up, voltage stabilizing chip U18, capacitor C 6, capacitor C 7, capacitor C 8, voltage stabilizing IC chip U17, resistance R 11, resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, resistance R 17, resistance R 18, triode Q16, triode Q17, FET triode Q8, the FET triode Q9 of power brick; The output of output voltage V up is connected in the voltage input pin of voltage stabilizing chip U18 and an end of capacitor C 7; The ground pin of voltage stabilizing chip U18 and the other end ground connection of capacitor C 7; The voltage output pin of voltage stabilizing chip U18 is connected in an end of capacitor C 8, an end of resistance R 18 and the emitter of triode Q16; The other end ground connection of capacitor C 8; The other end of resistance R 18 connects an end of capacitor C 6 and the positive supply input terminal VDD pin of voltage stabilizing IC chip U17; The negative supply input terminal VSS pin ground connection of the other end of capacitor C 6 and voltage stabilizing IC chip U17; The discharge control of voltage stabilizing IC chip U17 is with an end of FET gate leve splicing ear DO pin connection resistance R 17, and the other end of resistance R 17 connects the base stage of triode Q16, and the over-current detection terminal VM pin of voltage stabilizing IC chip U17 connects an end of resistance R 15; The other end of resistance R 15 connects an end, an end of resistance R 11, the source electrode of FET triode Q8 and the source electrode of FET triode Q9 of resistance R 12; The other end of resistance R 12 and resistance R 11 is connected total negative pole B-of battery, and the drain electrode of FET triode Q8 connects the drain electrode of FET triode Q9 and the negative pole P-of power brick, and the grid of FET triode Q8 connects grid, an end of resistance R 16 and the collector electrode of triode Q17 of FET triode Q9; The other end of resistance R 16 connects output voltage V up; The base stage of triode Q17 connects an end of resistance R 13 and an end of resistance R 14, the grounded emitter of the other end of resistance R 13 and triode Q17, and the other end of resistance R 14 connects the collector electrode of triode Q16.
Further, the model of voltage stabilizing chip U18 is HT7130, and the model of voltage stabilizing IC chip U17 is S8261ACEMD.
The utility model adopts the foregoing circuit structure, compared with prior art, has following advantage:
1. through improvement to power-supplying circuit; Adopt the total voltage of battery pack to come power taking; Promptly adopt the mode of whole power taking rather than the mode of traditional preceding four batteries power takings; Guarantee the stability of in charge and discharge process power supply power supply, and to consume be the capacity of total battery pack, so can guarantee the consistency of battery;
2. through improvement to over-current detection circuit; Adopt voltage stabilizing chip HT7130, voltage stabilizing IC chip S8261ACEMD and high accuracy low-temperature coefficient resistance R 11 and R12 to detect; Gather ohmically voltage through chip, guaranteed to cross the accuracy and the validity of flow valuve.
Description of drawings
Fig. 1 is the circuit theory diagrams of the utility model to improved a kind of execution mode of power-supplying circuit;
Fig. 2 is the circuit theory diagrams of the utility model to improved other a kind of execution mode of power-supplying circuit;
Fig. 3 is the circuit theory diagrams of the utility model to improved a kind of execution mode of over-current detection circuit.
Embodiment
Combine accompanying drawing and embodiment that the utility model is further specified at present.
A kind of battery protecting circuit of dynamic lithium battery group; Comprise dynamic lithium battery group, power-supplying circuit, load circuit, over-current detection circuit; Said power-supplying circuit is connected in the total anodal B+ of dynamic lithium battery group; And the voltage voltage stabilizing of circuit is become output voltage V up is load circuit and over-current detection circuit power supply; The input of said over-current detection circuit is electrically connected on the detection signal output of dynamic lithium battery group, and the output of over-current detection circuit is electrically connected on the detection signal input of load circuit.Wherein the utility model improves to the power-supplying circuit and the over-current detection circuit of the battery protecting circuit of dynamic lithium battery group.
As improved a kind of execution mode to power-supplying circuit; As shown in Figure 1; The battery protecting circuit of a kind of dynamic lithium battery group of the utility model; Its power-supplying circuit comprises the follow circuit of voltage stabilizing didoe Z1, triode Q10 and triode Q10; The follow circuit of said triode Q10 comprises resistance R 173, resistance R 174, resistance R 175, capacitor C 3, capacitor C 5, and the output of total anodal B+ of said battery connects resistance R 173 and resistance R 174 1 ends, and the other end of resistance R 173 connects the collector electrode of triode Q10; The other end of resistance R 174 connects an end, the negative pole of voltage stabilizing didoe Z1, an end of resistance R 175 and the base stage of triode Q10 of capacitor C 5; The other end ground connection of the positive pole of the other end of capacitor C 5, voltage stabilizing didoe Z1 and resistance R 175, the emitter of triode Q10 connects an end and the output voltage V up of capacitor C 3, the other end ground connection of capacitor C 3.Wherein the model of triode Q10 is 5551, and triode Q10 also can adopt other models of the like product of realizing said function certainly.
As improved other a kind of execution mode to power-supplying circuit; As shown in Figure 2; The battery protecting circuit of a kind of dynamic lithium battery group of the utility model; Its power-supplying circuit comprises the follow circuit of adjustable accurate shunt regulator Q11, triode Q12 and triode Q12, and the follow circuit of triode Q12 comprises resistance R 1, resistance R 2, resistance R 3, resistance R 4, capacitor C 4, and the output of total anodal B+ of battery connects an end of resistance R 3 and resistance R 4; The other end of resistance R 3 connects the collector electrode of triode Q12; The other end of resistance R 4 connects an end, the negative electrode of adjustable accurate shunt regulator Q11 and the base stage of triode Q12 of capacitor C 4, the plus earth of the other end of capacitor C 4 and adjustable accurate shunt regulator Q11, and the reference edge of adjustable accurate shunt regulator Q11 connects an end of resistance R 1 and an end of resistance R 2; The other end ground connection of resistance R 2, the other end of resistance R 1 connects emitter and the output voltage V up of triode Q12.Wherein the model of triode Q12 is 5551, and the model of adjustable accurate shunt regulator Q11 is APL431, and triode Q12 and adjustable accurate shunt regulator Q11 also can adopt other models of the like product of realizing said function certainly.
As over-current detection circuit being carried out improved a kind of execution mode; As shown in Figure 3; The battery protecting circuit of a kind of dynamic lithium battery group of the utility model; Its over-current detection circuit comprises negative pole P-, total negative pole B-of battery, output voltage V up, voltage stabilizing chip HT7130, capacitor C 6, capacitor C 7, capacitor C 8, voltage stabilizing IC chip S8261ACEMD, resistance R 11, resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, resistance R 17, resistance R 18, triode Q16, triode Q17, FET triode Q8, the FET triode Q9 of power brick; The output of output voltage V up is connected in the voltage input pin of voltage stabilizing chip HT7130 and an end of capacitor C 7; The ground pin of voltage stabilizing chip HT7130 and the other end ground connection of capacitor C 7; The voltage output pin of voltage stabilizing chip U18 is connected in an end of capacitor C 8, an end of resistance R 18 and the emitter of triode Q16; The other end ground connection of capacitor C 8; The other end of resistance R 18 connects an end of capacitor C 6 and the VDD pin of voltage stabilizing IC chip S8261ACEMD, the VSS pin ground connection of the other end of capacitor C 6 and voltage stabilizing IC chip S8261ACEMD, and the DO pin of voltage stabilizing IC chip S8261ACEMD connects an end of resistance R 17; The other end of resistance R 17 connects the base stage of triode Q16; The VM pin of voltage stabilizing IC chip S8261ACEMD connects an end of resistance R 15, and the other end of resistance R 15 connects an end, an end of resistance R 11, the source electrode of FET triode Q8 and the source electrode of FET triode Q9 of resistance R 12, and the other end of resistance R 12 and resistance R 11 is connected total negative pole B-of battery; The drain electrode of FET triode Q8 connects the drain electrode of FET triode Q9 and the negative pole P-of power brick; The grid of FET triode Q8 connects grid, an end of resistance R 16 and the collector electrode of triode Q17 of FET triode Q9, and the other end of resistance R 16 connects output voltage V up, and the base stage of triode Q17 connects an end of resistance R 13 and an end of resistance R 14; The grounded emitter of the other end of resistance R 13 and triode Q17, the other end of resistance R 14 connects the collector electrode of triode Q16.Wherein the model of triode Q16 is 3906, and the model of triode Q17 is 3904, and triode Q16 and triode Q17 also can adopt other models of the like product of realizing said function certainly.Same, voltage stabilizing chip HT7130 and voltage stabilizing IC chip S8261ACEMD also can adopt the voltage stabilizing chip of other models of the like product of realizing said function to substitute.
Although specifically show and introduced the utility model in conjunction with preferred embodiment; But the those skilled in the art should be understood that; In the spirit and scope of the utility model that does not break away from appended claims and limited; Can make various variations to the utility model in form with on the details, be the protection range of the utility model.
Claims (6)
1. the battery protecting circuit of a dynamic lithium battery group; It is characterized in that: comprise dynamic lithium battery group, power-supplying circuit, baffle circuit, over-current detection circuit; Said power-supplying circuit is connected in the dynamic lithium battery group; And the voltage voltage stabilizing of dynamic lithium battery group is become output voltage V up is baffle circuit and over-current detection circuit power supply; The input of said over-current detection circuit is electrically connected on the test side of dynamic lithium battery group, and the detection signal output of over-current detection circuit is electrically connected on the detection signal input of baffle circuit, and said power-supplying circuit is the voltage follower circuit that is made up of regulator unit and triode.
2. battery protecting circuit according to claim 1; It is characterized in that: said voltage follower circuit specifically: form by voltage stabilizing didoe Z1, triode Q10, resistance R 173, resistance R 174, resistance R 175, capacitor C 3, capacitor C 5; The output of total anodal B+ of battery connects resistance R 173 and resistance R 174 1 ends; The other end of resistance R 173 connects the collector electrode of triode Q10; The other end of resistance R 174 connects an end, the negative pole of voltage stabilizing didoe Z1, an end of resistance R 175 and the base stage of triode Q10 of capacitor C 5; The other end ground connection of the positive pole of the other end of capacitor C 5, voltage stabilizing didoe Z1 and resistance R 175, the emitter of triode Q10 connects an end and the output voltage V up of capacitor C 3, the other end ground connection of capacitor C 3.
3. battery protecting circuit according to claim 1; It is characterized in that: said voltage follower circuit specifically: form by adjustable accurate shunt regulator Q11, triode Q12, resistance R 1, resistance R 2, resistance R 3, resistance R 4, capacitor C 4; The output of total anodal B+ of battery connects an end of resistance R 3 and resistance R 4; The other end of resistance R 3 connects the collector electrode of triode Q12; The other end of resistance R 4 connects an end, the negative electrode of adjustable accurate shunt regulator Q11 and the base stage of triode Q12 of capacitor C 4, the plus earth of the other end of capacitor C 4 and adjustable accurate shunt regulator Q11, and the reference edge of adjustable accurate shunt regulator Q11 connects an end of resistance R 1 and an end of resistance R 2; The other end ground connection of resistance R 2, the other end of resistance R 1 connects emitter and the output voltage V up of triode Q12.
4. battery protecting circuit according to claim 3 is characterized in that: the model of described adjustable accurate shunt regulator Q11 is APL431.
5. battery protecting circuit according to claim 1; It is characterized in that: said over-current detection circuit specifically: the negative pole P-, total negative pole B-of battery, output voltage V up, voltage stabilizing chip U18, capacitor C 6, capacitor C 7, capacitor C 8, voltage stabilizing IC chip U17, resistance R 11, resistance R 12, resistance R 13, resistance R 14, resistance R 15, resistance R 16, resistance R 17, resistance R 18, triode Q16, triode Q17, FET triode Q8, the FET triode Q9 that comprise power brick; The output of output voltage V up is connected in the voltage input pin of voltage stabilizing chip U18 and an end of capacitor C 7; The ground pin of voltage stabilizing chip U18 and the other end ground connection of capacitor C 7; The voltage output pin of voltage stabilizing chip U18 is connected in an end of capacitor C 8, an end of resistance R 18 and the emitter of triode Q16; The other end ground connection of capacitor C 8; The other end of resistance R 18 connects an end of capacitor C 6 and the positive supply input terminal VDD pin of voltage stabilizing IC chip U17; The negative supply input terminal VSS pin ground connection of the other end of capacitor C 6 and voltage stabilizing IC chip U17; The discharge control of voltage stabilizing IC chip U17 connects an end of resistance R 17 with FET gate leve splicing ear DO pin; The other end of resistance R 17 connects the base stage of triode Q16; The over-current detection terminal VM pin of voltage stabilizing IC chip U17 connects an end of resistance R 15, and the other end of resistance R 15 connects an end, an end of resistance R 11, the source electrode of FET triode Q8 and the source electrode of FET triode Q9 of resistance R 12, and the other end of resistance R 12 and resistance R 11 is connected total negative pole B-of battery; The drain electrode of FET triode Q8 connects the drain electrode of FET triode Q9 and the negative pole P-of power brick; The grid of FET triode Q8 connects grid, an end of resistance R 16 and the collector electrode of triode Q17 of FET triode Q9, and the other end of resistance R 16 connects output voltage V up, and the base stage of triode Q17 connects an end of resistance R 13 and an end of resistance R 14; The grounded emitter of the other end of resistance R 13 and triode Q17, the other end of resistance R 14 connects the collector electrode of triode Q16.
6. battery protecting circuit according to claim 5 is characterized in that: the model of said voltage stabilizing chip U18 is HT7130, and the model of voltage stabilizing IC chip U17 is S8261ACEMD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204751073U CN202333775U (en) | 2011-11-25 | 2011-11-25 | Battery protective circuit of power lithium battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204751073U CN202333775U (en) | 2011-11-25 | 2011-11-25 | Battery protective circuit of power lithium battery pack |
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| Publication Number | Publication Date |
|---|---|
| CN202333775U true CN202333775U (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204751073U Expired - Fee Related CN202333775U (en) | 2011-11-25 | 2011-11-25 | Battery protective circuit of power lithium battery pack |
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| CN (1) | CN202333775U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849536A (en) * | 2015-06-11 | 2015-08-19 | 中国人民解放军国防科学技术大学 | Detection circuit for serial lithium battery pack protection chip |
| CN108183607A (en) * | 2018-02-11 | 2018-06-19 | 浙江亿邦信息技术有限公司 | A kind of power control circuit and application |
-
2011
- 2011-11-25 CN CN2011204751073U patent/CN202333775U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104849536A (en) * | 2015-06-11 | 2015-08-19 | 中国人民解放军国防科学技术大学 | Detection circuit for serial lithium battery pack protection chip |
| CN104849536B (en) * | 2015-06-11 | 2017-12-01 | 中国人民解放军国防科学技术大学 | It is a kind of be applied to can serial lithium battery group protection chip detection circuit |
| CN108183607A (en) * | 2018-02-11 | 2018-06-19 | 浙江亿邦信息技术有限公司 | A kind of power control circuit and application |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: QUANZHOU YONGMING HONGXINGHONG TECHNOLOGY DEVELOPM Free format text: FORMER OWNER: BALEAF (XIAMEN) NEW ENERGY TECHNOLOGY CO., LTD. Effective date: 20140619 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 361000 XIAMEN, FUJIAN PROVINCE TO: 362000 QUANZHOU, FUJIAN PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140619 Address after: 362000 Jinjiang Economic Development Zone, Quanzhou, Fujian province (five Li Garden) Patentee after: Quanzhou Yongming Hong Xing Hong Technology Development Co. Ltd. Address before: 361000 Fujian province Xiamen torch hi tech Zone (Xiangan) Industrial Zone No. 899 Liuzhou Road two Patentee before: Baleaf (Xiamen) New Energy Technology Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120711 Termination date: 20141125 |
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| EXPY | Termination of patent right or utility model |