CN204316079U - A kind of lithium battery protection circuit - Google Patents
A kind of lithium battery protection circuit Download PDFInfo
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- CN204316079U CN204316079U CN201520045697.4U CN201520045697U CN204316079U CN 204316079 U CN204316079 U CN 204316079U CN 201520045697 U CN201520045697 U CN 201520045697U CN 204316079 U CN204316079 U CN 204316079U
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Abstract
A kind of lithium battery protection circuit, comprise the lithium battery group be at least made up of the lithium battery of two joints successively series connection mutually, charging module, inversion module, voltage detection module, comparator module, module for metering electric quantity, intelligent processing module, LCD MODULE and function button module, the voltage that described voltage detection module is connected for detecting single lithium battery and overall lithium battery group with the both positive and negative polarity of overall lithium battery group with the both positive and negative polarity of each single lithium battery respectively, loop between the input of described charging module and lithium battery group is provided with charge switch, loop between the output of described inversion module and lithium battery group is provided with discharge switch.This lithium battery protection circuit is by monomer protection and Global Macros combines, intuitively can show lithium battery group operating state and electricity service condition, can automatically also can manual control charging and discharging circuit.
Description
Technical field
The utility model relates to technical field of lithium batteries, is specifically related to a kind of lithium battery protection circuit.
Background technology
Because lithium battery has the plurality of advantages such as discharge voltage is stable, self-discharge rate is low, the life-span is long, memory-less effect, volume are little, nuisanceless, be widely used in recent years.The voltage that single lithium battery provides is limited, in actual applications, usually needs multiple single lithium battery series connection to obtain lithium battery group, outwardly provides higher voltage by lithium battery group.Work safely and reliably for making lithium battery group, usual meeting is for lithium battery group whole installation protective circuit, but this Global Macros really cannot ensure the safe handling of lithium battery group, because in lithium battery group there is certain difference in the bulk properties of each single lithium battery, and along with the increase of lithium battery group discharge and recharge number of times, this otherness of each single lithium battery can increase gradually, single lithium battery is caused to occur overcharging, cross and put, a series of faults such as imbalance, cause reduce the useful life of whole lithium battery group, hydraulic performance decline, even scrap time serious, blast.For this reason, special chip that single lithium battery is protected and circuit have been there is at present.
But the protective circuit of existing this single lithium battery; do not combine with the Global Macros of lithium battery group; and user cannot be made to understand operating state and the electricity service condition of whole battery pack intuitively, user cannot carry out from master control the charging and discharging circuit of lithium battery according to actual needs.
Utility model content
The technical problems to be solved in the utility model is: provide a kind of monomer to protect and Global Macros combines, intuitively can show lithium battery group operating state and electricity service condition, can automatically also can the lithium battery protection circuit of manual control charging and discharging circuit.
Technical solution of the present utility model is: provide a kind of lithium battery protection circuit, comprise the lithium battery group be at least made up of the lithium battery of two joints successively series connection mutually, charging module, inversion module, voltage detection module, comparator module, module for metering electric quantity, intelligent processing module, LCD MODULE and function button module, the voltage that described voltage detection module is connected for detecting single lithium battery and overall lithium battery group with the both positive and negative polarity of overall lithium battery group with the both positive and negative polarity of each single lithium battery respectively, each voltage signal that described voltage detection module exports is connected with the corresponding input of comparator module respectively, another input of described comparator module is connected with each reference voltage respectively, the output of described voltage detection module, the output of charging module is connected with the input of module for metering electric quantity respectively with the output of inversion module, each output of described comparator module, the output of module for metering electric quantity, LCD MODULE is connected with intelligent processing module respectively with function button module, loop between the input of described charging module and lithium battery group is provided with charge switch, loop between the output of described inversion module and lithium battery group is provided with discharge switch, described intelligent processing module is connected with discharge switch with charge switch respectively by driver module.
After adopting said structure, the utility model has the following advantages:
The utility model is by detecting the voltage of each single lithium battery and the voltage of overall lithium battery, it is compared with reference voltage during discharge and recharge respectively, once the charging/discharging voltage of one of them single lithium battery occurs abnormal, or the voltage of overall lithium battery group occurs abnormal, intelligent processing module will send control signal to driver module to control charge switch or discharge switch disconnection, to protect charge circuit and discharge loop, in addition by arranging module for metering electric quantity and LCD MODULE, intuitively can show the voltage of lithium battery group, electric current, electricity and operating state, be convenient to the daily monitoring of user, also discharge and recharge instruction can be sent by function button module according to actual needs in addition by function button module installation relevant parameter.
As preferably, also comprise the balance module equal with single lithium battery quantity and by-pass switch, each balance module described and by-pass switch are in parallel with corresponding single lithium battery again after connecting, and described intelligent processing module is connected with each by-pass switch respectively by driver module.Balance module is set and for the single lithium battery in parallel with it provides discharge path in charging process, thus the equalizing charge of each single lithium battery can be realized, reduce the difference between each single lithium battery.
As preferably, also comprise sound and light alarm module, described sound and light alarm module is connected with intelligent processing module.This setting can be used for carrying out alarm to abnormal conditions.
Accompanying drawing illustrates:
Fig. 1 is structural representation of the present utility model;
In the utility model figure: 1-lithium battery group, 2-charging module, 3-inversion module, 4-voltage detection module, 5-comparator module, 6-module for metering electric quantity, 7-intelligent processing module, 8-LCD MODULE, 9-function button module, 10-reference voltage, 11-charge switch, 12-discharge switch, 13-driver module, 14-balance module, 15-by-pass switch, 16-sound and light alarm module.
Embodiment
Below in conjunction with accompanying drawing, and the utility model is described further in conjunction with the embodiments.
Embodiment:
As shown in Figure 1, a kind of lithium battery protection circuit, comprise the lithium battery group 1 be at least made up of the lithium battery of two joints successively series connection mutually, charging module 2, inversion module 3, voltage detection module 4, comparator module 5, module for metering electric quantity 6, intelligent processing module 7, LCD MODULE 8 and function button module 9, described function button module 9 is for carrying out the break-make arranging and control according to actual needs charge and discharge switch to relevant parameter, the voltage that described voltage detection module 4 is connected for detecting single lithium battery and overall lithium battery group with the both positive and negative polarity of overall lithium battery group with the both positive and negative polarity of each single lithium battery respectively, each voltage signal that described voltage detection module 4 exports is connected with the corresponding input of comparator module 5 respectively, another input of described comparator module 5 is connected with each reference voltage 10 respectively, each reference voltage 10 is the discharge and recharge limiting voltage of each single lithium battery and overall lithium battery group, such as, on charge circuit, the in-phase input end of each comparator connects the detection voltage of each single lithium battery and overall lithium battery group, each single lithium battery of anti-phase input termination of each comparator and the charging limit voltage of overall lithium battery group, on discharge loop, the in-phase input end of each comparator connects the discharge electrode voltage limit of each single lithium battery and overall lithium battery group, each single lithium battery of anti-phase input termination of each comparator and the detection voltage of overall lithium battery group, the output of described voltage detection module 4, the output of charging module 2 is connected with the input of module for metering electric quantity 6 respectively with the output of inversion module 3, the output of voltage detection module 4 is connected with module for metering electric quantity 6 and can be used for measuring the voltage of each single lithium battery and overall lithium battery group, the output of charging module 2 is connected with the input of module for metering electric quantity 6 respectively with the output of inversion module 3, the metering for electricity of the electric current of charge circuit and the electric current of discharge loop can be obtained, each output of described comparator module 5, the output of module for metering electric quantity 6, LCD MODULE 8 is connected with intelligent processing module 7 respectively with function button module 9, loop between described charging module 2 and the input of lithium battery group 1 is provided with charge switch 11, loop between described inversion module 3 and the output of lithium battery group 1 is provided with discharge switch 12, described intelligent processing module 7 is connected with discharge switch 12 with charge switch 11 respectively by driver module 13.Described intelligent processing module 7 is DSP, and model is TMS320F2812, and the model of described module for metering electric quantity 6 is DS2786, and the model of described LCD MODULE 8 is HS12864-12.
As preferably, also comprise the balance module 14 equal with single lithium battery quantity and by-pass switch 15, each balance module 14 described and by-pass switch 15 are in parallel with corresponding single lithium battery again after connecting, and described intelligent processing module 7 is connected with each by-pass switch 15 respectively by driver module 13.
As preferably, also comprise sound and light alarm module 16, described sound and light alarm module 16 is connected with intelligent processing module 7.
The utility model detects the voltage of each single lithium battery and the voltage of overall lithium battery, when charging, the voltage of single lithium battery and limiting voltage during charging are compared, once the charging voltage of one of them single lithium battery goes beyond the limit of value, the by-pass switch 15 that intelligent processing module 7 will control to be in parallel with this single lithium battery closes, thus this single lithium battery is isolated, and charging current is discharged by balance module 14, until the voltage of all charged or overall lithium battery group of all single lithium battery exceeds charging limit value, then control charge switch 11 to disconnect, complete the charging to lithium battery, arranging balance module 14 can for the single lithium battery in parallel with it provides discharge path in charging process, thus realize the equalizing charge of each single lithium battery, reduce the difference between each single lithium battery, when discharging, once detect that the discharge voltage that the discharge voltage of one of them single lithium battery goes beyond the limit of value or overall lithium battery group goes beyond the limit of value, intelligent processing module 7 will disconnect and control sound and light alarm module 16 and report to the police by controlled discharge switch 12, in addition by arranging module for metering electric quantity 6 and LCD MODULE 8, intuitively can show the voltage of lithium battery group 1, electric current, electricity and operating state, be convenient to the daily monitoring of user, can relevant parameter be set by function button module 9 and send discharge and recharge instruction by function button module 9 according to actual needs in addition, therefore lithium battery protection circuit of the present utility model can be carried out the automatic protection of charging and discharging circuit by intelligent processing module 7, also can be protected by function button module 9 pairs of charging and discharging circuit and control according to actual needs by user.
Claims (3)
1. a lithium battery protection circuit, comprise the lithium battery group (1) be at least made up of the lithium battery of two joints successively series connection mutually, charging module (2), inversion module (3), it is characterized in that: also comprise voltage detection module (4), comparator module (5), module for metering electric quantity (6), intelligent processing module (7), LCD MODULE (8) and function button module (9), the voltage that described voltage detection module (4) is connected for detecting single lithium battery and overall lithium battery group with the both positive and negative polarity of overall lithium battery group with the both positive and negative polarity of each single lithium battery respectively, each voltage signal that described voltage detection module (4) exports is connected with the corresponding input of comparator module (5) respectively, another input of described comparator module (5) is connected with each reference voltage (10) respectively, the output of described voltage detection module (4), the output of charging module (2) is connected with the input of module for metering electric quantity (6) respectively with the output of inversion module (3), each output of described comparator module (5), the output of module for metering electric quantity (6), LCD MODULE (8) is connected with intelligent processing module (7) respectively with function button module (9), loop between the input of described charging module (2) and lithium battery group (1) is provided with charge switch (11), loop between the output of described inversion module (3) and lithium battery group (1) is provided with discharge switch (12), described intelligent processing module (7) is connected with discharge switch (12) with charge switch (11) respectively by driver module (13).
2. a kind of lithium battery protection circuit according to claim 1; it is characterized in that: also comprise the balance module (14) equal with single lithium battery quantity and by-pass switch (15); described each balance module (14) and by-pass switch (15) are in parallel with corresponding single lithium battery again after connecting, and described intelligent processing module (7) is connected with each by-pass switch (15) respectively by driver module (13).
3. a kind of lithium battery protection circuit according to claim 1, is characterized in that: also comprise sound and light alarm module (16), and described sound and light alarm module (16) is connected with intelligent processing module (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520045697.4U CN204316079U (en) | 2015-01-23 | 2015-01-23 | A kind of lithium battery protection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520045697.4U CN204316079U (en) | 2015-01-23 | 2015-01-23 | A kind of lithium battery protection circuit |
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| CN204316079U true CN204316079U (en) | 2015-05-06 |
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| CN201520045697.4U Expired - Fee Related CN204316079U (en) | 2015-01-23 | 2015-01-23 | A kind of lithium battery protection circuit |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953659A (en) * | 2015-06-24 | 2015-09-30 | 国家电网公司 | Charge-discharge equalization circuit for battery pack and charge-discharge method |
| CN106696725A (en) * | 2015-11-17 | 2017-05-24 | 北汽福田汽车股份有限公司 | Power distribution method and device of electric vehicle power battery and electric vehicle |
-
2015
- 2015-01-23 CN CN201520045697.4U patent/CN204316079U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953659A (en) * | 2015-06-24 | 2015-09-30 | 国家电网公司 | Charge-discharge equalization circuit for battery pack and charge-discharge method |
| CN106696725A (en) * | 2015-11-17 | 2017-05-24 | 北汽福田汽车股份有限公司 | Power distribution method and device of electric vehicle power battery and electric vehicle |
| CN106696725B (en) * | 2015-11-17 | 2019-06-14 | 北京宝沃汽车有限公司 | A kind of power distribution method of power battery of electric vehicle, device and electric vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150506 Termination date: 20160123 |
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| EXPY | Termination of patent right or utility model |