CN204559182U - A kind of lithium battery list Zhi Junheng integrated circuit - Google Patents
A kind of lithium battery list Zhi Junheng integrated circuit Download PDFInfo
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- CN204559182U CN204559182U CN201520242707.3U CN201520242707U CN204559182U CN 204559182 U CN204559182 U CN 204559182U CN 201520242707 U CN201520242707 U CN 201520242707U CN 204559182 U CN204559182 U CN 204559182U
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Abstract
The utility model discloses a kind of lithium battery list Zhi Junheng integrated circuit, comprise a chip, chip is provided with supply power voltage pin, publicly pin, overcharge pin, temperature detection pin and cross put pin; Supply power voltage pin is connected with the both positive and negative polarity of lithium battery respectively with pin publicly, overcharge pin to be connected with controlled switch, temperature switch and heating resistor successively, controlled switch is connected with supply power voltage pin, heating resistor is connected with pin publicly, temperature detection pin is connected with a temperature sensor, temperature sensor connects pin publicly, and temperature sensor is attached to a side surface of heating resistor, and temperature switch is attached to the opposite side surface of heating resistor.The utility model 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, electric current balanced in theory can infinitely amplify, and restriction is only controlled by the area of dissipation of resistance.
Description
Technical field
The utility model belongs to technical field of lithium batteries, is 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.
Utility model content
In order to solve above-mentioned the deficiencies in the prior art, the utility model 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 utility model 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 utility model 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.
The beneficial effects of the utility model are as follows:
The utility model 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.The utility model structure 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 solutions of the utility model, in order to better understand technological means of the present utility model, 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 utility model.Embodiment of the present utility model is provided in detail by following examples and accompanying drawing thereof.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present utility model, and form a application's part, schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is circuit diagram of the present utility model.
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 utility model 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 preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
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 |
|---|---|---|---|
| CN201520242707.3U CN204559182U (en) | 2015-04-21 | 2015-04-21 | A kind of lithium battery list Zhi Junheng integrated circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520242707.3U CN204559182U (en) | 2015-04-21 | 2015-04-21 | A kind of lithium battery list Zhi Junheng integrated circuit |
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| CN204559182U true CN204559182U (en) | 2015-08-12 |
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| CN201520242707.3U Active CN204559182U (en) | 2015-04-21 | 2015-04-21 | A kind of lithium battery list Zhi Junheng integrated circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734305A (en) * | 2015-04-21 | 2015-06-24 | 中投仙能科技（苏州）有限公司 | Balance integrated circuit for single lithium ion battery |
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2015
- 2015-04-21 CN CN201520242707.3U patent/CN204559182U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734305A (en) * | 2015-04-21 | 2015-06-24 | 中投仙能科技（苏州）有限公司 | Balance integrated circuit for single lithium ion battery |
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