CN201044354Y - Multi-joint series protective circuit of lithium cell - Google Patents
Multi-joint series protective circuit of lithium cell Download PDFInfo
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- CN201044354Y CN201044354Y CNU2007200517460U CN200720051746U CN201044354Y CN 201044354 Y CN201044354 Y CN 201044354Y CN U2007200517460 U CNU2007200517460 U CN U2007200517460U CN 200720051746 U CN200720051746 U CN 200720051746U CN 201044354 Y CN201044354 Y CN 201044354Y
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Abstract
The utility model discloses a lithium battery serial connection protective circuit. Each lithium battery is provided with a battery detection IC, an overvoltage signal coupling circuit, an under voltage signal coupling circuit, an under voltage and overcurrent signal coupling circuit, an overcharge control circuit, a charging circuit, a discharge under pressure and overcurrent control circuit and a discharging circuit. Compared with the prior art, each battery of the utility model has overcharge and overdischarge protection, thus realizing respective independence of the charging circuit and the discharging circuit and enhancing the charging efficiency and discharging efficiency. The utility model is a lithium battery serial connection protective circuit applicable to protection of high power lithium battery.
Description
Technical field
The utility model relates to a kind of battery protecting circuit, especially lithium battery multi-section serial protective circuit.
Background technology
Existing lithium battery multi-section serial protective circuit; as shown in Figure 1; charging circuit and discharge circuit lump together, and must cause heating and loss by the charging field effect transistor when when charging must be by the field effect transistor of discharge, in discharge, and charge efficiency and discharging efficiency are lower.When heavy-current discharge, if the parallel field effect pipe is when increasing power output, charging and discharge control just must be used the field effect transistor of equal number, have increased cost and power consumption, are not suitable for the protection of high-power dynamic lithium battery.
The utility model content
The purpose of this utility model provides a kind of charge efficiency and discharging efficiency is higher, be applicable to the lithium battery multi-section serial protective circuit that high-power dynamic lithium battery is protected.
The technical solution of the utility model is such: lithium battery multi-section serial protective circuit comprises battery detecting IC, overvoltage signal coupling circuit, under-voltage signal coupling circuit, the control circuit that overcharges, charging circuit, under-voltage and over-current signal coupling circuit, discharge under-voltage and over-current control circuit and discharge circuit; The detection input of above-mentioned battery detecting IC is connected to the positive and negative end that respectively saves lithium battery respectively; Above-mentioned overvoltage signal coupling circuit saves the corresponding setting of lithium battery respectively with each, and the overvoltage signal output part of above-mentioned battery detecting IC connects the input that respectively saves the pairing above-mentioned overvoltage signal coupling circuit of lithium battery respectively; Above-mentioned under-voltage and over-current signal coupling circuit and the wherein corresponding setting of a joint lithium battery, other respectively saves lithium battery and the corresponding setting respectively of above-mentioned under-voltage signal coupling circuit, the under-voltage signal output part of above-mentioned battery detecting IC connects the input that respectively saves the pairing above-mentioned under-voltage signal coupling circuit of lithium battery respectively, and under-voltage, the over-current signal output of above-mentioned battery detecting IC connects the input of above-mentioned under-voltage and over-current signal coupling circuit; The output of above-mentioned each overvoltage signal coupling circuit connects the input of the above-mentioned control circuit that overcharges, the output of the above-mentioned control circuit that overcharges connects the input of above-mentioned charging circuit, and the output of above-mentioned charging circuit connects the charging negative input of lithium battery; Above-mentioned each under-voltage signal coupling circuit, above-mentioned output under-voltage and the over-current signal coupling circuit connect the input of the under-voltage and over-current control circuit of above-mentioned discharge, above-mentioned discharge is under-voltage and the output of over-current control circuit connects the input of above-mentioned discharge circuit, the output of above-mentioned discharge circuit connects the discharging current detection input of the discharge cathode output end of lithium battery, above-mentioned battery detecting IC and the discharge cathode output end of lithium battery respectively, and the discharging current of above-mentioned battery detecting IC detects and is connected with discharging current detection resistance between input and the ground.
Also comprise flow equalizing circuit, this flow equalizing circuit is connected to the positive and negative end that respectively saves lithium battery respectively.
Be connected with the charging current foldback circuit between the charging negative input of the output of above-mentioned charging circuit and lithium battery.
Be connected with the discharge temp control circuit between the discharge cathode output end of the output of above-mentioned discharge circuit and lithium battery.
The output of above-mentioned discharge circuit is connected with the discharge prevention pinning of mutual electrical connection and automatic restoring circuit, delay control circuit respectively.
Based on identical thinking, the utility model has also adopted following scheme: lithium battery multi-section serial protective circuit comprises battery detecting IC, overvoltage signal coupling circuit, under-voltage signal coupling circuit, the control circuit that overcharges, charging circuit, under-voltage and over-current signal coupling circuit, the under-voltage control circuit that discharges, discharge under-voltage and over-current control circuit and discharge circuit; The detection input of above-mentioned battery detecting IC is connected to the positive and negative end that respectively saves lithium battery respectively; Above-mentioned overvoltage signal coupling circuit saves the corresponding setting of lithium battery respectively with each, and the overvoltage signal output part of above-mentioned battery detecting IC connects the input that respectively saves the pairing above-mentioned overvoltage signal coupling circuit of lithium battery respectively; Above-mentioned under-voltage and over-current signal coupling circuit and the wherein corresponding setting of a joint lithium battery, other respectively saves lithium battery and the corresponding setting respectively of above-mentioned under-voltage signal coupling circuit, the under-voltage signal output part of above-mentioned battery detecting IC connects the input that respectively saves the pairing above-mentioned under-voltage signal coupling circuit of lithium battery respectively, and under-voltage, the over-current signal output of above-mentioned battery detecting IC connects the input of above-mentioned under-voltage and over-current signal coupling circuit; The output of above-mentioned each overvoltage signal coupling circuit connects the input of the above-mentioned control circuit that overcharges, the output of the above-mentioned control circuit that overcharges connects the input of above-mentioned charging circuit, and the output of above-mentioned charging circuit connects the charging negative input of lithium battery; The output of above-mentioned each under-voltage signal coupling circuit connects the input of the under-voltage control circuit of above-mentioned discharge, the output of the under-voltage control circuit of above-mentioned discharge connects the input of above-mentioned discharge circuit, above-mentioned output under-voltage and the over-current signal coupling circuit connects the input of the under-voltage and over-current control circuit of above-mentioned discharge, above-mentioned discharge is under-voltage and the output of over-current control circuit connects the input of above-mentioned discharge circuit, the output of above-mentioned discharge circuit connects the discharge cathode output end of lithium battery respectively, the discharging current of above-mentioned battery detecting IC detects the discharge cathode output end of input and lithium battery, and the discharging current of above-mentioned battery detecting IC detects and is connected with discharging current detection resistance between input and the ground.
Also comprise flow equalizing circuit, this flow equalizing circuit is connected to the positive and negative end that respectively saves lithium battery respectively.
Be connected with the charging current foldback circuit between the charging negative input of the output of above-mentioned charging circuit and lithium battery.
Be connected with the discharge temp control circuit between the discharge cathode output end of the output of above-mentioned discharge circuit and lithium battery.
The output of above-mentioned discharge circuit is connected with the discharge prevention pinning of mutual electrical connection and automatic restoring circuit, delay control circuit respectively.
After adopting such scheme, lithium battery multi-section serial protective circuit of the present utility model by being connected and expansion of battery detecting IC, overvoltage signal coupling circuit, overcharge control circuit and charging circuit, has realized the serial connection charge protection of any joint lithium battery; By battery detecting IC, under-voltage signal coupling circuit, under-voltage and over-current signal coupling circuit, the under-voltage control circuit that discharges, discharge is under-voltage and being connected of over-current control circuit and discharge circuit, and has realized the discharged in series protection (comprising under-voltage and overcurrent) of any joint lithium battery.The utility model compared with prior art; every batteries all possesses to overcharge and cross puts protection; realized that charging circuit and discharge circuit are independent separately, charge efficiency and discharging efficiency all are improved, be applicable to the lithium battery multi-section serial protective circuit of high-power dynamic lithium battery protection.
Description of drawings
Fig. 1 is the circuit block diagram of the utility model embodiment one.
Fig. 2 is the circuit block diagram of the utility model embodiment two.
Embodiment
Lithium battery multi-section serial protective circuit of the present utility model; be in series and be example with four joint lithium batteries; embodiment one as shown in Figure 1; four battery detecting IC 1 that comprise corresponding respectively four joint lithium batteries; four overvoltage signal coupling circuits 2 of corresponding respectively four joint lithium batteries; under-voltage and the over-current signal coupling circuit 4 of the joint lithium battery that the under-voltage signal coupling circuit 3 of corresponding respectively wherein three joint lithium batteries and correspondence are remaining; control circuit 5 overcharges; charging circuit 6; charging current foldback circuit 7, the under-voltage and over-current control circuit 8 that discharges, discharge circuit 9; discharge temp control circuit 10, discharge prevention pins and automatic restoring circuit 11 and delay circuit 12.
As shown in Figure 1, the detection input of battery detecting IC 1 is connected to the positive and negative end that respectively saves lithium battery respectively, each positive and negative end that saves lithium battery also and be connected to flow equalizing circuit 13, flow equalizing circuit 13 is used for the balanced capacity volume variance that respectively saves between lithium battery; The overvoltage signal output part of battery detecting IC 1 connects the input that respectively saves the pairing overvoltage signal coupling circuit 2 of lithium battery respectively; the output of each overvoltage signal coupling circuit 2 connects the input of the control circuit 5 that overcharges; the output of control circuit 5 of overcharging connects the input of charging circuit 6; the output of charging circuit 6 connects the input of charging current foldback circuit 7, and the output of charging current foldback circuit 7 connects the charging negative input of lithium battery.The utility model is connected and expansion with the above-mentioned of battery detecting IC 1 by overvoltage signal coupling circuit 2, the control circuit 5 that overcharges, charging circuit 6, flow equalizing circuit 13, has realized the serial connection charge protection of any joint lithium battery.
As shown in Figure 1, the under-voltage signal output part of battery detecting IC 1 connects the input of pairing three the under-voltage signal coupling circuits 3 of three joint lithium batteries respectively, and under-voltage, the over-current signal output of battery detecting IC 1 connects the input of under-voltage and over-current signal coupling circuit 4; Each is under-voltage signal coupling circuit 3; output under-voltage and over-current signal coupling circuit 4 connects the input of discharge under-voltage and over-current control circuit 8; the output of under-voltage and over-current control circuit 8 of discharging connects the input of discharge circuit 9; the output of discharge circuit 9 connects the input of discharge temp control circuit 10 respectively; the discharging current of battery detecting IC 1 detects input; the discharge cathode output end of the input of delay circuit 12 and lithium battery; the discharging current of battery detecting IC 1 detects and is connected with discharging current detection resistance 14 between input and the ground; the output of discharge temp control circuit 10 connects the discharge cathode output end of lithium battery; the output of delay circuit 12 connects the input of discharge prevention pinning and automatic restoring circuit 11, and the output of discharge prevention pinning and automatic restoring circuit 11 connects the control input end of discharge circuit 9.The utility model is connected with the above-mentioned of battery detecting IC 1 by under-voltage signal coupling circuit 3, the under-voltage and over-current control circuit 8 of discharge, discharge circuit 9, has realized that the discharged in series of any joint lithium battery is protected (comprising under-voltage and overcurrent).The utility model passes through under-voltage signal coupling circuit 3, discharge is under-voltage and over-current control circuit 8, discharge circuit 9, discharge prevention pinning and automatic restoring circuit 11 and delay circuit 12, when overcurrent and under-voltage protection, if load does not disconnect, even if under-voltage and overcurrent recovers, discharge circuit also cuts out, in case load disconnects, then discharging function recovers; The purpose that increases delay circuit is not protect for the moment that starts in load, the time that can need protection according to the different adjustment of the needs of output loading, can not start to avoid the part inductive load, as motor etc.Discharge temp control circuit 10 plays a part discharge battery temperature detection and control, if battery temperature surpasses set point, then discharge circuit 9 is forced to turn-off, and stops output, treats could recover output after temperature reduction and load disconnect.
Embodiment two of the present utility model as shown in Figure 2, the difference of present embodiment and embodiment one is under-voltage control of discharge and mistake current control are separated, concrete way is: disconnect the output of each under-voltage signal coupling circuit 2 and the line between under-voltage and over-current control circuit 8 inputs of discharge, and increased by one the discharge under-voltage control circuit 15, the output of each under-voltage signal coupling circuit 2 is connected to the input of the under-voltage control circuit 15 of discharge, the output of the under-voltage control circuit 15 that discharges is connected to the input of discharge circuit 9 again.Remaining part is identical with embodiment one, no longer repeats here.
Claims (10)
1. lithium battery multi-section serial protective circuit is characterized in that: comprise battery detecting IC, overvoltage signal coupling circuit, under-voltage signal coupling circuit, the control circuit that overcharges, charging circuit, under-voltage and over-current signal coupling circuit, discharge under-voltage and over-current control circuit and discharge circuit; The detection input of above-mentioned battery detecting IC is connected to the positive and negative end that respectively saves lithium battery respectively; Above-mentioned overvoltage signal coupling circuit saves the corresponding setting of lithium battery respectively with each, and the overvoltage signal output part of above-mentioned battery detecting IC connects the input that respectively saves the pairing above-mentioned overvoltage signal coupling circuit of lithium battery respectively; Above-mentioned under-voltage and over-current signal coupling circuit and the wherein corresponding setting of a joint lithium battery, other respectively saves lithium battery and the corresponding setting respectively of above-mentioned under-voltage signal coupling circuit, the under-voltage signal output part of above-mentioned battery detecting IC connects the input that respectively saves the pairing above-mentioned under-voltage signal coupling circuit of lithium battery respectively, and under-voltage, the over-current signal output of above-mentioned battery detecting IC connects the input of above-mentioned under-voltage and over-current signal coupling circuit; The output of above-mentioned each overvoltage signal coupling circuit connects the input of the above-mentioned control circuit that overcharges, the output of the above-mentioned control circuit that overcharges connects the input of above-mentioned charging circuit, and the output of above-mentioned charging circuit connects the charging negative input of lithium battery; Above-mentioned each under-voltage signal coupling circuit, above-mentioned output under-voltage and the over-current signal coupling circuit connect the input of the under-voltage and over-current control circuit of above-mentioned discharge, above-mentioned discharge is under-voltage and the output of over-current control circuit connects the input of above-mentioned discharge circuit, the output of above-mentioned discharge circuit connects the discharging current detection input of the discharge cathode output end of lithium battery, above-mentioned battery detecting IC and the discharge cathode output end of lithium battery respectively, and the discharging current of above-mentioned battery detecting IC detects and is connected with discharging current detection resistance between input and the ground.
2. lithium battery multi-section serial protective circuit according to claim 1 is characterized in that: also comprise flow equalizing circuit, this flow equalizing circuit is connected to the positive and negative end that respectively saves lithium battery respectively.
3. lithium battery multi-section serial protective circuit according to claim 1 is characterized in that: be connected with the charging current foldback circuit between the charging negative input of the output of above-mentioned charging circuit and lithium battery.
4. lithium battery multi-section serial protective circuit according to claim 1 is characterized in that: be connected with the discharge temp control circuit between the discharge cathode output end of the output of above-mentioned discharge circuit and lithium battery.
5. lithium battery multi-section serial protective circuit according to claim 1 is characterized in that: the output of above-mentioned discharge circuit is connected with the discharge prevention pinning of mutual electrical connection and automatic restoring circuit, delay control circuit respectively.
6. lithium battery multi-section serial protective circuit is characterized in that: comprise battery detecting IC, overvoltage signal coupling circuit, under-voltage signal coupling circuit, the control circuit that overcharges, charging circuit, under-voltage and over-current signal coupling circuit, the under-voltage control circuit that discharges, discharge under-voltage and over-current control circuit and discharge circuit; The detection input of above-mentioned battery detecting IC is connected to the positive and negative end that respectively saves lithium battery respectively; Above-mentioned overvoltage signal coupling circuit saves the corresponding setting of lithium battery respectively with each, and the overvoltage signal output part of above-mentioned battery detecting IC connects the input that respectively saves the pairing above-mentioned overvoltage signal coupling circuit of lithium battery respectively; Above-mentioned under-voltage and over-current signal coupling circuit and the wherein corresponding setting of a joint lithium battery, other respectively saves lithium battery and the corresponding setting respectively of above-mentioned under-voltage signal coupling circuit, the under-voltage signal output part of above-mentioned battery detecting IC connects the input that respectively saves the pairing above-mentioned under-voltage signal coupling circuit of lithium battery respectively, and under-voltage, the over-current signal output of above-mentioned battery detecting IC connects the input of above-mentioned under-voltage and over-current signal coupling circuit; The output of above-mentioned each overvoltage signal coupling circuit connects the input of the above-mentioned control circuit that overcharges, the output of the above-mentioned control circuit that overcharges connects the input of above-mentioned charging circuit, and the output of above-mentioned charging circuit connects the charging negative input of lithium battery; The output of above-mentioned each under-voltage signal coupling circuit connects the input of the under-voltage control circuit of above-mentioned discharge, the output of the under-voltage control circuit of above-mentioned discharge connects the input of above-mentioned discharge circuit, above-mentioned output under-voltage and the over-current signal coupling circuit connects the input of the under-voltage and over-current control circuit of above-mentioned discharge, above-mentioned discharge is under-voltage and the output of over-current control circuit connects the input of above-mentioned discharge circuit, the output of above-mentioned discharge circuit connects the discharge cathode output end of lithium battery respectively, the discharging current of above-mentioned battery detecting IC detects the discharge cathode output end of input and lithium battery, and the discharging current of above-mentioned battery detecting IC detects and is connected with discharging current detection resistance between input and the ground.
7. lithium battery multi-section serial protective circuit according to claim 6 is characterized in that: also comprise flow equalizing circuit, this flow equalizing circuit is connected to the positive and negative end that respectively saves lithium battery respectively.
8. lithium battery multi-section serial protective circuit according to claim 6 is characterized in that: be connected with the charging current foldback circuit between the charging negative input of the output of above-mentioned charging circuit and lithium battery.
9. lithium battery multi-section serial protective circuit according to claim 6 is characterized in that: be connected with the discharge temp control circuit between the discharge cathode output end of the output of above-mentioned discharge circuit and lithium battery.
10. lithium battery multi-section serial protective circuit according to claim 6 is characterized in that: the output of above-mentioned discharge circuit is connected with the discharge prevention pinning of mutual electrical connection and automatic restoring circuit, delay control circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200517460U CN201044354Y (en) | 2007-05-22 | 2007-05-22 | Multi-joint series protective circuit of lithium cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200517460U CN201044354Y (en) | 2007-05-22 | 2007-05-22 | Multi-joint series protective circuit of lithium cell |
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| Publication Number | Publication Date |
|---|---|
| CN201044354Y true CN201044354Y (en) | 2008-04-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200517460U Expired - Fee Related CN201044354Y (en) | 2007-05-22 | 2007-05-22 | Multi-joint series protective circuit of lithium cell |
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| CN (1) | CN201044354Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035187A (en) * | 2010-11-23 | 2011-04-27 | 浙江绿源电动车有限公司 | Charger, discharge protection device, controller, charge and discharge protection device and system |
| CN103490389A (en) * | 2013-09-25 | 2014-01-01 | 无锡中星微电子有限公司 | Battery protecting circuit and system |
-
2007
- 2007-05-22 CN CNU2007200517460U patent/CN201044354Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035187A (en) * | 2010-11-23 | 2011-04-27 | 浙江绿源电动车有限公司 | Charger, discharge protection device, controller, charge and discharge protection device and system |
| CN102035187B (en) * | 2010-11-23 | 2014-07-16 | 浙江绿源电动车有限公司 | Charger, discharge protection device, controller, charge and discharge protection device and system |
| CN103490389A (en) * | 2013-09-25 | 2014-01-01 | 无锡中星微电子有限公司 | Battery protecting circuit and system |
| CN103490389B (en) * | 2013-09-25 | 2016-06-15 | 无锡中感微电子股份有限公司 | Battery protecting circuit and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080402 Termination date: 20120522 |