CN104734305A - Balance integrated circuit for single lithium ion battery - Google Patents
Balance integrated circuit for single lithium ion battery Download PDFInfo
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- CN104734305A CN104734305A CN201510189784.1A CN201510189784A CN104734305A CN 104734305 A CN104734305 A CN 104734305A CN 201510189784 A CN201510189784 A CN 201510189784A CN 104734305 A CN104734305 A CN 104734305A
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Abstract
The invention discloses a balance integrated circuit for a single lithium ion battery. The balance integrated circuit comprises a chip. The chip is provided with a power supply voltage pin, a public ground pin, an over-charge pin, a temperature detecting pin and an over-discharge pin, wherein the power supply voltage pin and the public ground pin are respectively connected with the anode and the cathode of the lithium ion battery; the over-charge pin is sequentially connected with a controlled switch, a temperature switch, and a heating resistor; the controlled switch is connected with the power supply voltage pin; the heating resistor is connected with the public ground pin; the temperature detecting pin is connected with a temperature sensor; the temperature sensor is connected with the public ground pin and attaches to the surface of one side of the heating resistor; the temperature switch attaches to the surface of the other side of the heating resistor. The balance integrated circuit has the advantages that large-current balance of the single lithium ion battery is achieved by the coordination of the chip with the temperature switch and the temperature sensor, temperature is prevented from being out of control, balanced currents can be amplified in an unlimited manner theoretically, and limitation is only controlled by the radiating area of the resistor.
Description
Technical field
The invention belongs to technical field of lithium batteries, be specifically related to a kind of lithium battery list Zhi Junheng integrated circuit.
Background technology
Existing lithium battery balanced way is directly heated the electric current that heating resistor is continuously applied 0.2A ~ 0.3A by chip; and only adopt the mode of control switch to control the opening and closing of equalizing circuit; but usually by the impact of environmental factor, the risk of temperature control can be there is in the temperature of heating resistor.
Summary of the invention
In order to solve above-mentioned the deficiencies in the prior art, the present invention aims to provide a kind of lithium battery list Zhi Junheng integrated circuit, is applied in li-ion cell protection device, can prop up lithium battery form available protecting to the list overcharged.
For solving the problems of the technologies described above, the present invention is achieved through the following technical solutions:
A kind of lithium battery list Zhi Junheng integrated circuit, comprises a chip, described chip is provided with supply power voltage pin, publicly pin, overcharges pin, temperature detection pin and cross and put pin; Described supply power voltage pin is connected with the both positive and negative polarity of lithium battery respectively with described pin publicly, the described pin that overcharges is connected with controlled switch, temperature switch and heating resistor successively, described controlled switch is connected with described supply power voltage pin, described heating resistor is connected with described pin publicly, described temperature detection pin is connected with a temperature sensor, pin publicly described in described temperature sensor connects, described temperature sensor is attached to a side surface of described heating resistor, and described temperature switch is attached to the opposite side surface of described heating resistor.
Further, the break-off signal value that the feedback temperature value that described temperature sensor sets sets lower than described temperature switch.
Further, the material of described temperature switch adopts marmem or two gold plaque.
Further, described temperature sensor is the one in NTC or PTC.
Further, the power of described heating resistor is 5 ~ 100w.
Operation principle of the present invention is as follows:
When overcharging appears in lithium battery, controlled switch is opened, and electric current flows to heating resistor after controlled switch, temperature switch, and heating resistor starts heating, for lithium battery carries out current balance.When the temperature of heating resistor reaches the first set point (such as 50 DEG C), signal is fed back to chip through temperature detection pin by temperature sensor immediately, and chip stops immediately to resistance heating, further the safety of protection lithium battery.When resistance temperature to be heated returns to below the first set point, chip, to resistance recovery heating, carries out next time balanced, moves in circles, hocket.
If chip was once lose efficacy, the temperature of heating resistor can break through the first set point, and when reaching the second set point (such as 70 DEG C), temperature switch, due to himself characteristic generation deformation, disconnects voluntarily, and heating resistor stops heating, formed dual fail-safe, avoided temperature control.
Beneficial effect of the present invention is as follows:
The present invention is coordinated by chip and temperature switch and temperature sensor, and realize the big current of single lithium battery balanced, and overcome the situation of temperature control, as long as resistive dissipation area allows, electric current balanced in theory can infinitely amplify.Structure of the present invention is simple, and advantage of lower cost, can be applied in li-ion cell protection device, can prop up lithium battery form available protecting to the list overcharged.
Above-mentioned explanation is only the general introduction of technical solution of the present invention, in order to better understand technological means of the present invention, and can be implemented according to the content of specification, coordinates accompanying drawing to be described in detail as follows below with preferred embodiment of the present invention.The specific embodiment of the present invention is provided in detail by following examples and accompanying drawing thereof.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is circuit diagram of the present invention.
Number in the figure illustrates: 1, lithium battery; U1, chip; VCC, supply power voltage pin; GND, publicly pin; CO, overcharge pin; TP, temperature detection pin; DO, mistake put pin; SW1, controlled switch; SW2, temperature switch; R2, heating resistor; R3, temperature sensor.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the present invention in detail.
Shown in Figure 1, a kind of lithium battery list Zhi Junheng integrated circuit, comprise a chip U1, described chip U1 be provided with supply power voltage pin VCC, publicly pin GND, overcharge pin CO, temperature detection pin TP and cross put pin DO, described supply power voltage pin VCC is connected with the both positive and negative polarity of lithium battery 1 respectively with the described GND of pin publicly, described overcharge pin CO successively with controlled switch SW1, temperature switch SW2 is connected with heating resistor R2, described controlled switch SW1 is connected with described supply power voltage pin VCC, described heating resistor R2 is connected with the described GND of pin publicly, described temperature detection pin TP is connected with a temperature sensor R3, pin GND publicly described in described temperature sensor R3 connects, described temperature sensor R3 is attached to a side surface of described heating resistor R2, described temperature switch SW2 is attached to the opposite side surface of described heating resistor R2.
Further, the break-off signal value that the feedback temperature value that described temperature sensor R3 sets sets lower than described temperature switch SW2.
Further, the material of described temperature switch SW2 adopts marmem or two gold plaque.
Further, described temperature sensor R3 is the one in NTC or PTC.
Further, the power of described heating resistor R2 is 5w.
When overcharging appears in lithium battery, controlled switch is opened, and electric current flows to heating resistor after controlled switch, temperature switch, and heating resistor starts heating, for lithium battery carries out current balance.When the temperature of heating resistor reaches the first set point (such as 50 DEG C), signal is fed back to chip through temperature detection pin by temperature sensor immediately, and chip stops immediately to resistance heating, further the safety of protection lithium battery.When resistance temperature to be heated returns to below the first set point, chip, to resistance recovery heating, carries out next time balanced, moves in circles, hocket.
If chip was once lose efficacy, the temperature of heating resistor can break through the first set point, and when reaching the second set point (such as 70 DEG C), temperature switch, due to himself characteristic generation deformation, disconnects voluntarily, and heating resistor stops heating, formed dual fail-safe, avoided temperature control.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (5)
1. a lithium battery list Zhi Junheng integrated circuit, it is characterized in that: comprise a chip (U1), described chip (U1) be provided with supply power voltage pin (VCC), publicly pin (GND), overcharge pin (CO), temperature detection pin (TP) and cross put pin (DO), described supply power voltage pin (VCC) is connected with the both positive and negative polarity of lithium battery (1) respectively with described pin publicly (GND), described overcharge pin (CO) successively with controlled switch (SW1), temperature switch (SW2) is connected with heating resistor (R2), described controlled switch (SW1) is connected with described supply power voltage pin (VCC), described heating resistor (R2) is connected with described pin publicly (GND), described temperature detection pin (TP) is connected with a temperature sensor (R3), pin (GND) publicly described in described temperature sensor (R3) connects, described temperature sensor (R3) is attached to a side surface of described heating resistor (R2), described temperature switch (SW2) is attached to the opposite side surface of described heating resistor (R2).
2. lithium battery list Zhi Junheng integrated circuit according to claim 1, is characterized in that: the break-off signal value that the feedback temperature value that described temperature sensor (R3) sets sets lower than described temperature switch (SW2).
3. lithium battery list Zhi Junheng integrated circuit according to claim 1, is characterized in that: the material of described temperature switch (SW2) adopts marmem or two gold plaque.
4. lithium battery list Zhi Junheng integrated circuit according to claim 1, is characterized in that: described temperature sensor (R3) is the one in NTC or PTC.
5. lithium battery list Zhi Junheng integrated circuit according to claim 1, is characterized in that: the power of described heating resistor (R2) is 5w.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510189784.1A CN104734305A (en) | 2015-04-21 | 2015-04-21 | Balance integrated circuit for single lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510189784.1A CN104734305A (en) | 2015-04-21 | 2015-04-21 | Balance integrated circuit for single lithium ion battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104734305A true CN104734305A (en) | 2015-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510189784.1A Pending CN104734305A (en) | 2015-04-21 | 2015-04-21 | Balance integrated circuit for single lithium ion battery |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016192515A1 (en) * | 2015-06-02 | 2016-12-08 | 中投仙能科技（苏州）有限公司 | Battery pack, and charging management system and method |
| CN106253384A (en) * | 2016-08-12 | 2016-12-21 | 辽宁比科新能源股份有限公司 | A kind of battery balanced device with heating function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010259281A (en) * | 2009-04-28 | 2010-11-11 | Honda Motor Co Ltd | Power supply system |
| CN104092190A (en) * | 2014-07-28 | 2014-10-08 | 中投仙能科技（苏州）有限公司 | Trigger type lithium battery physical protector based on equalization |
| CN104104068A (en) * | 2013-12-20 | 2014-10-15 | 中投仙能科技（苏州）有限公司 | Lithium ion battery protector |
| CN104333099A (en) * | 2014-11-28 | 2015-02-04 | 中投仙能科技（苏州）有限公司 | Integrated circuit for lithium battery protector |
| CN204559182U (en) * | 2015-04-21 | 2015-08-12 | 中投仙能科技（苏州）有限公司 | A kind of lithium battery list Zhi Junheng integrated circuit |
-
2015
- 2015-04-21 CN CN201510189784.1A patent/CN104734305A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010259281A (en) * | 2009-04-28 | 2010-11-11 | Honda Motor Co Ltd | Power supply system |
| CN104104068A (en) * | 2013-12-20 | 2014-10-15 | 中投仙能科技（苏州）有限公司 | Lithium ion battery protector |
| CN104092190A (en) * | 2014-07-28 | 2014-10-08 | 中投仙能科技（苏州）有限公司 | Trigger type lithium battery physical protector based on equalization |
| CN104333099A (en) * | 2014-11-28 | 2015-02-04 | 中投仙能科技（苏州）有限公司 | Integrated circuit for lithium battery protector |
| CN204559182U (en) * | 2015-04-21 | 2015-08-12 | 中投仙能科技（苏州）有限公司 | A kind of lithium battery list Zhi Junheng integrated circuit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016192515A1 (en) * | 2015-06-02 | 2016-12-08 | 中投仙能科技（苏州）有限公司 | Battery pack, and charging management system and method |
| CN106253384A (en) * | 2016-08-12 | 2016-12-21 | 辽宁比科新能源股份有限公司 | A kind of battery balanced device with heating function |
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Application publication date: 20150624 |
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