CN203326662U - Storage battery discharge undervoltage identification circuit - Google Patents
Storage battery discharge undervoltage identification circuit Download PDFInfo
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- CN203326662U CN203326662U CN2013203818874U CN201320381887U CN203326662U CN 203326662 U CN203326662 U CN 203326662U CN 2013203818874 U CN2013203818874 U CN 2013203818874U CN 201320381887 U CN201320381887 U CN 201320381887U CN 203326662 U CN203326662 U CN 203326662U
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- storage battery
- irf9640
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- 230000005669 field effect Effects 0.000 claims abstract description 19
- 238000007599 discharging Methods 0.000 claims abstract description 12
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000002253 acid Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
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Abstract
The utility model provides a storage battery discharge undervoltage identification circuit, which comprises a field-effect transistor IRF9640, a chip TL431, a resistor R1, a resistor R2 and a resistor R3. The G pole of the field-effect transistor IRF9640 is connected to the K pole of the chip TL431. Both ends of the resistor R3 are respectively connected to the S pole of the field-effect transistor IRF9640 and the K pole of the chip TL431. Both ends of the resistor R1 are respectively connected to the S pole of the field-effect transistor IRF9640 and the R pole of the chip TL431. Both ends of the resistor R2 are respectively connected to the R pole of the chip TL431 and the A pole of the chip TL431. The circuit provided by the utility model has the following advantages: the structure is simple; costs are low; functions are stable and reliable; service efficiency of a storage battery is effectively improved; and service life of the storage battery is greatly prolonged. The storage battery discharge undervoltage identification circuit can be applied in various circuits related to charging and discharging of a storage battery.
Description
Technical field
The utility model relates to the attending device of storage battery, relates in particular to the under-voltage identification circuit of a kind of battery discharging.
Background technology
The minimal protection voltage of 12V lead acid accumulator is 10.5V, and for a long time lower than this value work, storage battery is just in over-discharge state, and now, battery capacity sharply descends, and not only reduces the efficiency of storage battery, and to producing baneful influence in its useful life.Existing solution utilizes integrated circuit to realize mostly, due to integrated electronic devices and components in a large number, makes use cost greatly increase.
For this reason, the utility model has designed a under-voltage identification maneuver circuit of the storage battery based on the TL431 chip, this circuit is placed in the charging and discharging circuit of storage battery, can effectively prevent battery overdischarge.
The utility model content
For solving above-mentioned defect of the prior art, the utility model provides a kind of battery discharging under-voltage identification circuit, has solved the overdischarge problem in the storage battery use procedure, the useful life of effectively having improved storage battery.
For solving the problems of the technologies described above, the utility model scheme comprises: the under-voltage identification circuit of a kind of battery discharging, it is characterized in that, described circuit comprises field effect transistor IRF9640, chip TL431, resistance R 1, resistance R 2 and resistance R 3, the G utmost point of described field effect transistor IRF9640 is connected with the K utmost point of chip TL431, described resistance R 3 two ends connect respectively the S utmost point of field effect transistor IRF9640 and the K utmost point of chip TL431, the two ends of described resistance R 1 connect respectively the S utmost point of field effect transistor IRF9640 and the R utmost point of chip TL431, the two ends of described resistance R 2 connect respectively the R utmost point of chip TL431 and the A utmost point of chip TL431.
Further, the resistance of described resistance R 1, R2, R3 is respectively: R1=10k Ω, R2=3.1k Ω, R3=5k Ω.
The beneficial effects of the utility model are: the utility model is simple in structure, with low cost, function-stable is reliable, break-make by chip TL431 and field effect transistor IRF9640 realizes the control to the battery discharging process, and at the brownout alarm, effectively improved the service efficiency of storage battery, greatly extended the useful life of storage battery, can be applied in the various circuit that relate to accumulator cell charging and discharging.
The accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model;
Circuit theory diagrams when Fig. 2 is the utility model use.
Embodiment
Below in conjunction with accompanying drawing, concrete enforcement of the present utility model is described, should be appreciated that exemplifying embodiment described herein is only for description and interpretation the utility model, and be not used in restriction the utility model.
As shown in Figure 1, the under-voltage identification circuit of battery discharging of the present utility model comprises field effect transistor IRF9640, chip TL431, resistance R 1, resistance R 2 and resistance R 3, the G utmost point of described field effect transistor IRF9640 is connected with the K utmost point of chip TL431, described resistance R 3 two ends connect respectively the S utmost point of field effect transistor IRF9640 and the K utmost point of chip TL431, the two ends of described resistance R 1 connect respectively the S utmost point of field effect transistor IRF9640 and the R utmost point of chip TL431, and the two ends of described resistance R 2 connect respectively the R utmost point of chip TL431 and the A utmost point of chip TL431.
As shown in Figure 2, when using this circuit, need in the loop between this circuit access charge power supply and lead acid accumulator, now, the D utmost point of field effect transistor IRF9640 is connected to the positive pole of charge power supply, the S utmost point of field effect transistor IRF9640 is connected to the positive pole of lead acid accumulator, the A utmost point of chip TL431 is connected respectively to the negative pole of lead acid accumulator and charge power supply, connect loads between the both positive and negative polarity of charge power supply, and a small resistor R0 is set on the circuit between the negative pole of the A of the chip TL431 utmost point and load.The resistance of resistance R 1, R2, R3 is respectively: R1=10k Ω, R2=3.1k Ω, R3=5k Ω.
When the power network normal power supply, on the one hand, charge power supply can be directly load supplying, and on the other hand, the direct current that charge power supply produces arrives the S direction through IRF9640(D) be that lead acid accumulator continues charging.
When power network cuts off the power supply, lead acid accumulator is started working, the about 13.8V of initial discharge voltage, through R1, after the R2 dividing potential drop, be added in voltage on the TL431 reference edge and be about 3.3V, be greater than 2.5V, enough open TL431, now IRF9640 also is opened, voltage is added in the load two ends by IRF9640, As time goes on, when the 12V battery tension is down to 10.5V, through R1, after the R2 dividing potential drop, be added in voltage on the TL431 reference edge and be about 2.5V, equal the cut-in voltage of TL431, now reach the critical value of circuit, when battery tension is down to 10.5V when following, be added in voltage on the TL431 reference edge and be less than 2.5V, the TL431 cut-off, send the undervoltage warning signal, then whole battery discharging circuit is cut off, storage battery stops electric discharge, the protection of realization to storage battery.
Should be understood that; the above-mentioned description for preferred embodiment is comparatively detailed; can not therefore think the restriction to the utility model scope of patent protection; those of ordinary skill in the art is under enlightenment of the present utility model; do not breaking away from the scope situation that the utility model claim protects; can also make the various deformation such as replacement, simple combination, within these all fall into protection range of the present utility model, the scope of asking for protection of the present utility model should be as the criterion with claims.
Claims (2)
1. the under-voltage identification circuit of battery discharging, it is characterized in that, described circuit comprises field effect transistor IRF9640, chip TL431, resistance R 1, resistance R 2 and resistance R 3, the G utmost point of described field effect transistor IRF9640 is connected with the K utmost point of chip TL431, described resistance R 3 two ends connect respectively the S utmost point of field effect transistor IRF9640 and the K utmost point of chip TL431, the two ends of described resistance R 1 connect respectively the S utmost point of field effect transistor IRF9640 and the R utmost point of chip TL431, and the two ends of described resistance R 2 connect respectively the R utmost point of chip TL431 and the A utmost point of chip TL431.
2. the under-voltage identification circuit of a kind of battery discharging according to claim 1, is characterized in that, the resistance of resistance R 1, R2, R3 is respectively: R1=10k Ω, R2=3.1k Ω, R3=5k Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203818874U CN203326662U (en) | 2013-06-28 | 2013-06-28 | Storage battery discharge undervoltage identification circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013203818874U CN203326662U (en) | 2013-06-28 | 2013-06-28 | Storage battery discharge undervoltage identification circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203326662U true CN203326662U (en) | 2013-12-04 |
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ID=49665956
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013203818874U Expired - Fee Related CN203326662U (en) | 2013-06-28 | 2013-06-28 | Storage battery discharge undervoltage identification circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203326662U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113659674A (en) * | 2021-08-14 | 2021-11-16 | 北京动力京工科技有限公司 | Single-electric core lithium ion battery charging and discharging protector |
| CN113659675A (en) * | 2021-08-14 | 2021-11-16 | 北京动力京工科技有限公司 | Charge-discharge protector for multi-cell lithium ion battery |
| CN113708443A (en) * | 2021-08-14 | 2021-11-26 | 北京动力京工科技有限公司 | Charging and discharging protector for two-cell lithium ion battery |
-
2013
- 2013-06-28 CN CN2013203818874U patent/CN203326662U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113659674A (en) * | 2021-08-14 | 2021-11-16 | 北京动力京工科技有限公司 | Single-electric core lithium ion battery charging and discharging protector |
| CN113659675A (en) * | 2021-08-14 | 2021-11-16 | 北京动力京工科技有限公司 | Charge-discharge protector for multi-cell lithium ion battery |
| CN113708443A (en) * | 2021-08-14 | 2021-11-26 | 北京动力京工科技有限公司 | Charging and discharging protector for two-cell lithium ion battery |
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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: 20131204 Termination date: 20160628 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |