CN214958839U - Charger capable of intelligently identifying battery pack and switching charging voltage and current - Google Patents
Charger capable of intelligently identifying battery pack and switching charging voltage and current Download PDFInfo
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- CN214958839U CN214958839U CN202023197627.0U CN202023197627U CN214958839U CN 214958839 U CN214958839 U CN 214958839U CN 202023197627 U CN202023197627 U CN 202023197627U CN 214958839 U CN214958839 U CN 214958839U
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Abstract
The utility model discloses a charger for intelligently identifying battery packs and switching charging voltage and current, which comprises an AC input end, an EMI filtering module, an input rectifying module, an input filtering module and a transformer, a main control module, a synchronous rectifying constant current output module, an output switch module and a power supply module, a DC output end, a battery pack voltage identification module, an 3/4/5 battery pack detection module and a battery pack ID identification module which are connected in sequence; the battery pack voltage identification module comprises a charging protection chip which is connected with the battery pack and used for detecting the voltage of each battery in the battery pack, and the charging protection chip is connected with the output switch module; the battery pack ID identification module comprises a first comparator unit, a second comparator unit and a third comparator unit which are connected with the ID end of the battery pack, and the first comparator unit, the second comparator unit and the third comparator unit are respectively connected with the main control module through a first optical coupler, a second optical coupler and a third optical coupler; and a resistor Rb, a resistor Rc and a resistor Rd are respectively connected between the first optocoupler, the second optocoupler and the third optocoupler and the main control module.
Description
The technical field is as follows:
the utility model relates to a charger product technical field refers in particular to an intelligent recognition battery package and switches charger voltage electric current's charger.
Background art:
the conventional single capacity lithium battery pack of the charger needs to be matched with a special lithium battery charger, so that the overall service life and the optimal charging time of the lithium battery pack can be prolonged.
The battery packs with different sizes can be extended according to the needs of various occasions, and the chargers special for various capacities can be matched in the battery packs with various capacities, thereby causing troubles in use. For example, when a large-capacity battery pack is placed in a small-capacity battery pack and a charger is matched with the large-capacity battery pack, the charging time is prolonged due to too small charging current, and the user is inconvenient; or the small-capacity battery pack is placed in a charger matched with a large-capacity battery pack, so that the service life of the battery is shortened because the charging current is overlarge. Therefore, the lithium battery pack is matched with a special lithium battery charger.
The current charger has small output current, long charging time and poor efficiency. The corresponding lithium battery packs with different section numbers and the corresponding special chargers with different section numbers cannot be compatible, and the use is very inconvenient.
In view of the above, the present inventors propose the following.
The utility model has the following contents:
an object of the utility model is to overcome prior art's not enough, provide an intelligent recognition battery package and switch charging voltage electric current's charger.
In order to solve the technical problem, the utility model discloses a following technical scheme: the charger capable of intelligently identifying the battery pack and switching charging voltage and current comprises an AC input end, an EMI filtering module, an input rectifying module, an input filtering module and a transformer which are sequentially connected, a main control module connected with the input filtering module and the transformer, a synchronous rectifying constant-current output module connected with the transformer, an output switch module and a power supply module connected with the synchronous rectifying constant-current output module, a DC output end connected with the output switch module and used for connecting the battery pack, a battery pack voltage identification module, an 3/4/5 battery pack detection module and a battery pack ID identification module which are all connected with the power supply module; the battery pack voltage identification module comprises a charging protection chip which is used for being connected with a battery pack and detecting the voltage of each battery in the battery pack, and the charging protection chip is connected with the output switch module to control the on-off of the output switch module; the 3/4/5 battery pack detection modules are connected with the main control module; the battery pack ID identification module comprises a first comparator unit, a second comparator unit and a third comparator unit which are connected with the ID end of the battery pack, and the first comparator unit, the second comparator unit and the third comparator unit are respectively connected with the main control module through a first optical coupler, a second optical coupler and a third optical coupler; and a resistor Rb, a resistor Rc and a resistor Rd are respectively connected among the first optical coupler, the second optical coupler and the third optical coupler and the main control module.
Furthermore, in the above technical solution, the output switch module includes a relay, a MOS transistor Q32, and a diode D2 connected in parallel to two ends of a coil of the relay, a D pole of the MOS transistor Q32 is connected to the relay, a G pole of the MOS transistor Q32 is connected to the charging protection chip through a resistor R82, an S pole of the MOS transistor Q32 is grounded, and a S pole and a G pole of the MOS transistor Q32 are connected to a resistor R83.
Further, in the above technical solution, the power supply module includes a buck chip connected to the synchronous rectification constant current output module, A5V terminal connected to the buck chip, a resistor R84 connected to the 5V terminal, a first voltage reference chip connected to the resistor R84, and a 1.25V terminal, where the model of the buck chip is CE6375a50PT, and the model of the first voltage reference chip is TL 432.
Furthermore, in the above technical solution, the type of the charging protection chip is a fine S8215, where pin 1 and pin 2 of the charging protection chip are both connected to the DC output terminal and the first battery in the battery pack, pins 3, 4, 5, and 6 of the charging protection chip are respectively connected to the second battery, the third battery, the fourth battery, and the fifth battery in the battery pack, pin 7 of the charging protection chip is connected to GND, and pin 7 of the charging protection chip is connected to the G electrode of the MOS transistor Q32 in the output switch module.
Further, in the above technical solution, the 3/4/5-battery pack detection module includes a first operational amplifier, a second operational amplifier, an MOS transistor Q110 connected to an output end of the first operational amplifier, an MOS transistor Q109 connected to an output end of the second operational amplifier, and a second voltage reference chip connected to both the MOS transistor Q109 and the MOS transistor Q110, and the second voltage reference chip is connected to the main control module through a fourth optocoupler; and the minus end of the first operational amplifier and the minus end of the second operational amplifier are both connected with the 1.25V end, and the plus end of the first operational amplifier and the plus end of the second operational amplifier are respectively connected with the 5 pin and the 6 pin of the charging protection chip.
Further, in the foregoing technical solution, the first comparator unit includes a first comparator, a connection resistor R25 at a negative end of the first comparator is connected to the 5V end, a connection resistor R27 at a positive end of the first comparator is connected to the ID end, a connection resistor R22 at an out end of the first comparator is connected to the first optocoupler, the connection resistor R21 at the negative end of the first comparator is connected to the capacitor C21 and then grounded, a connection resistor R26 is further connected in parallel at two ends of the capacitor C21, a connection resistor R24 is connected between the connection terminal of the first comparator and the out end, the connection resistor R24 is connected to the connection resistor R23 and then connected to the 5V end, and the connection resistor R22 is connected to the connection resistor R21 and then connected to the 5V end.
Furthermore, in the above technical solution, the line structures of the second comparator unit and the third comparator unit are the same as the line structure of the first comparator unit.
After the technical scheme is adopted, compared with the prior art, the utility model has following beneficial effect: the utility model discloses circuit layout is simple, and convenient to use increases the lithium cell and matches the product, the ability that compatible multi-capacity battery charges. The utility model discloses output current increases, shortens charge time to compatible 3, 4, 5 sections lithium cell packages are charged and are used, can fill the lithium cell package of multiple festival number, and control the highest charging voltage, effectively avoid the problem that the lithium cell overcharge in the lithium cell package, reach the purpose that intelligent recognition battery package and switching charging voltage electric current.
Description of the drawings:
fig. 1 is a first partial circuit diagram of the present invention;
fig. 2 is a second partial circuit diagram of the present invention;
fig. 3 is a third partial circuit diagram of the present invention;
fig. 4 is a battery pack circuit of 3 batteries according to the present invention;
fig. 5 is a battery pack circuit of 4 batteries according to the present invention;
fig. 6 is a battery pack circuit of 5 batteries according to the present invention.
The specific implementation mode is as follows:
the present invention will be further described with reference to the following specific embodiments and accompanying drawings.
As shown in fig. 1-6, the charger for intelligently identifying battery packs and switching charging voltage and current includes an AC input terminal 1, an EMI filter module 11, an input rectifier module 12, an input filter module 13, a transformer 14, a main control module 15 connected to the input filter module 13 and the transformer 14, a synchronous rectification constant current output module 16 connected to the transformer 14, an output switch module 2 and a power supply module 3 connected to the synchronous rectification constant current output module 16, a DC output terminal 5 connected to the output switch module 2 and used for connecting a battery pack 4, a battery pack voltage identification module 6, an 3/4/5 battery pack detection module 7, and a battery pack ID identification module 8 connected to the power supply module 3, which are connected in sequence; the battery pack voltage identification module 6 comprises a charging protection chip 61 which is used for being connected with the battery pack 4 and detecting the voltage of each battery in the battery pack 4, and the charging protection chip 61 is connected with the output switch module 2 to control the on-off of the output switch module 2; the 3/4/5 battery pack detection module 7 is connected with the main control module 15; the battery pack ID identification module 8 includes a first comparator unit 81, a second comparator unit 82, and a third comparator unit 83 connected to the ID terminal 41 of the battery pack 4, and the first comparator unit 81, the second comparator unit 82, and the third comparator unit 83 are respectively connected to the main control module 15 through a first optical coupler 84, a second optical coupler 85, and a third optical coupler 86; and a resistor Rb, a resistor Rc and a resistor Rd are respectively connected between the first optical coupler 84, the second optical coupler 85 and the third optical coupler 86 and the main control module 15.
The output switch module 2 includes a relay 21, a MOS transistor Q32, and a diode D2 connected in parallel to both ends of a coil of the relay 21, a D pole of the MOS transistor Q32 is connected to the relay 21, a G pole of the MOS transistor Q32 is connected to the charging protection chip 61 through a G pole connection resistor R82, an S pole of the MOS transistor Q32 is grounded, and a S pole and a G pole of the MOS transistor Q32 are connected to a resistor R83.
The power supply module 3 comprises a buck chip 31 connected with the synchronous rectification constant-current output module 16, A5V end 32 connected with the buck chip 31, a resistor R84 connected with the 5V end 32, a first voltage reference chip 33 connected with the resistor R84, and a 1.25V end 34, wherein the model of the buck chip 31 is CE6375a50PT, and the model of the first voltage reference chip 33 is TL 432.
The type of the charging protection chip 61 is a fine operation S8215, pins 1 and 2 of the charging protection chip 61 are both connected to the DC output terminal 5 and the first battery in the battery pack 4, pins 3, 4, 5 and 6 of the charging protection chip 61 are respectively connected to the second battery, the third battery, the fourth battery and the fifth battery in the battery pack 4, pin 7 of the charging protection chip 61 is connected to GND, and pin 7 of the charging protection chip 61 is connected to the G electrode of the MOS transistor Q32 in the output switch module 2.
The 3/4/5 battery pack detection module 7 comprises a first operational amplifier 71, a second operational amplifier 72, an MOS transistor Q110 connected to the output end of the first operational amplifier 71, an MOS transistor Q109 connected to the output end of the second operational amplifier 72, and a second voltage reference chip 73 connected to both the MOS transistor Q109 and the MOS transistor Q110, wherein the second voltage reference chip 73 is connected to the main control module 15 through a fourth optical coupler 74; the minus end of the first operational amplifier 71 and the minus end of the second operational amplifier 72 are both connected to the 1.25V end 34, and the plus end of the first operational amplifier 71 and the plus end of the second operational amplifier 72 are respectively connected to the 5 pin and the 6 pin of the charging protection chip 61.
The first comparator unit 81 includes a first comparator 811, a connection resistor R25 at a terminal of the first comparator 811 is connected to the 5V terminal 32, a connection resistor R27 at a terminal of the first comparator 811 is connected to the ID terminal 41, a connection resistor R22 at an end of the first comparator 811 is connected to the first optical coupler 84, the terminal of the first comparator 811 is connected to the capacitor C21 and then grounded, two terminals of the capacitor C21 are also connected in parallel to a resistor R26, a resistor R24 is connected between the terminal of the first comparator 811 and the end of the out, the resistor R24 is connected to the 5V terminal 32 after being connected to the resistor R23, and the resistor R22 is connected to the resistor R21 and then connected to the 5V terminal 32.
The line structure of the second comparator unit 82 and the third comparator unit 83 are the same as the line structure of the first comparator unit 81.
When the battery pack is connected, the charging protection chip 61 judges whether the voltage of each battery in the battery pack is too high, if the voltage of each battery is not too high, the charging protection chip 61 gives a high level signal to enable the MOS transistor Q32 to act, and the relay is driven to start charging. And through the 3/4/5 battery pack detection module 7, the-terminal of the first operational amplifier 71 and the-terminal of the second operational amplifier 72 are both a 1.25V reference potential, when 3 batteries are detected, the first operational amplifier 71 and the second operational amplifier 72 do not operate, the MOS transistor Q109 and the MOS transistor Q110 also do not operate, the output voltage is 13.5V at the maximum, when 4 batteries are detected, the + terminal input of the second operational amplifier 72 is higher than the-terminal input voltage, the output of the second operational amplifier 72 is high level to operate the MOS transistor Q109, the lower bias equivalent resistance of TL431 is reduced, the output voltage is increased to 17.5V, when 5 batteries are detected, the + terminal input of the first operational amplifier 71 and the second operational amplifier 72 are both higher than the-terminal input voltage, the comparator output is high level to operate the MOS transistor Q109/the MOS transistor Q110, the output voltage is increased to 21.25V when the equivalent resistance of the TL431 with lower bias is reduced, and the effect of circuit protection for 2 times is further achieved. Effectively ensuring that each voltage of the battery pack cannot be over-voltage.
The utility model discloses carry out intelligent selection to the lithium cell of 2Ah, 4Ah, 6Ah, 9Ah different capacities respectively and charge to the heavy current, increased resistance Rb, resistance Rc, resistance Rd, first opto-coupler 84, second opto-coupler 85, third opto-coupler 86 in current control circuit to increase battery package ID identification module 8 in secondary circuit, this battery package ID identification module 8 discerns battery capacity. The parameters of 2Ah, 4Ah, 6Ah and 9Ah with different capacities relative to the internal resistance R _ ID of the lithium battery pack are 680K, 330K, 100K and 51K, the reference 5V voltage is divided by the resistance R _ ID and the resistance R28, different capacities are respectively divided into different voltages, the ID voltages are compared at the input positive end (+ end) of the comparator, as long as the positive end (+ end) is larger than the negative end, the optical coupling is active, and conversely, the negative end of the comparator is larger than the positive end (+ end), the optical coupling is inactive, and the action time sequence is as follows. The first optocoupler 84, the second optocoupler 85 and the third optocoupler 86 are respectively abbreviated as U2, U3 and U4 optical coupling, as long as the U2, U3 and U4 optical coupling action equivalent circuits are Rb/, Rd equivalent parallel circuits, the total resistance value of the parallel resistors becomes smaller, so the current increases, and the obtained feedback voltage of the IC is equal.
To sum up, the utility model discloses circuit layout is simple, and convenient to use increases the lithium cell and matches the product, the ability that compatible multi-capacity battery charges. The utility model discloses output current increases, shortens charge time to compatible 3, 4, 5 sections lithium cell packages are charged and are used, can fill the lithium cell package of multiple festival number, and control the highest charging voltage, effectively avoid the problem that the lithium cell overcharge in the lithium cell package, reach the purpose that intelligent recognition battery package and switching charging voltage electric current.
Of course, the above description is only an exemplary embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent changes and modifications made by the constructions, features, and principles of the present invention in accordance with the claims of the present invention are intended to be included in the scope of the present invention.
Claims (7)
1. Charger of intelligent identification battery package and switching charging voltage electric current, it is including AC input (1) that connects gradually, EMI filter module (11), input rectifier module (12), input filter module (13) and transformer (14), main control module (15) all connected with input filter module (13) and transformer (14), synchronous rectification constant current output module (16) of being connected with transformer (14), output switch module (2) and power module (3) of being connected with synchronous rectification constant current output module (16), DC output (5) of being connected and being used for connecting battery package (4) with output switch module (2), its characterized in that:
the device also comprises a battery pack voltage identification module (6), an 3/4/5 battery pack detection module (7) and a battery pack ID identification module (8) which are all connected with the power supply module (3);
the battery pack voltage identification module (6) comprises a charging protection chip (61) which is used for being connected with the battery pack (4) and detecting the voltage of each battery in the battery pack (4), and the charging protection chip (61) is connected with the output switch module (2) to control the on-off of the output switch module (2);
the 3/4/5 battery pack detection module (7) is connected with the main control module (15);
the battery pack ID recognition module (8) comprises a first comparator unit (81), a second comparator unit (82) and a third comparator unit (83) which are connected with an ID end (41) of the battery pack (4), and the first comparator unit (81), the second comparator unit (82) and the third comparator unit (83) are respectively connected with the main control module (15) through a first optical coupler (84), a second optical coupler (85) and a third optical coupler (86); and a resistor Rb, a resistor Rc and a resistor Rd are respectively connected among the first optical coupler (84), the second optical coupler (85), the third optical coupler (86) and the main control module (15).
2. The charger of claim 1, wherein the charger is configured to intelligently identify a battery pack and switch charging voltage and current, and further configured to: the output switch module (2) comprises a relay (21), a MOS tube Q32 and a diode D2 connected in parallel with two ends of a coil of the relay (21), wherein the D pole of the MOS tube Q32 is connected with the relay (21), a G pole connecting resistor R82 of the MOS tube Q32 is connected with the charging protection chip (61), the S pole of the MOS tube Q32 is grounded, and the S pole and the G pole of the MOS tube Q32 are connected with a resistor R83.
3. The charger for intelligently identifying battery packs and switching charging voltage and current according to claim 1 or 2, wherein: the power supply module (3) comprises a voltage reduction chip (31) connected with the synchronous rectification constant current output module (16), A5V end (32) connected with the voltage reduction chip (31), a resistor R84 connected with the 5V end (32), a first voltage reference chip (33) connected with the resistor R84 and a 1.25V end (34), wherein the model of the voltage reduction chip (31) is CE6375A50PT, and the model of the first voltage reference chip (33) is TL 432.
4. The charger of claim 3, wherein the charger is configured to intelligently identify a battery pack and switch charging voltage and current, and further configured to: the type of the charging protection chip (61) is a fine operation S8215, wherein pins 1 and 2 of the charging protection chip (61) are connected with a DC output end (5) and a first battery in the battery pack (4), pins 3, 4, 5 and 6 of the charging protection chip (61) are respectively connected with a second battery, a third battery, a fourth battery and a fifth battery in the battery pack (4), pin 7 of the charging protection chip (61) is connected with GND, and pin 7 of the charging protection chip (61) is connected with a G pole of an MOS tube Q32 in the output switch module (2).
5. The charger of claim 3, wherein the charger is configured to intelligently identify a battery pack and switch charging voltage and current, and further configured to: the 3/4/5 battery pack detection module (7) comprises a first operational amplifier (71), a second operational amplifier (72), an MOS (metal oxide semiconductor) tube Q110 connected with the output end of the first operational amplifier (71), an MOS tube Q109 connected with the output end of the second operational amplifier (72), and a second voltage reference chip (73) connected with both the MOS tube Q109 and the MOS tube Q110, wherein the second voltage reference chip (73) is connected with the main control module (15) through a fourth optical coupler (74); and the negative end of the first operational amplifier (71) and the negative end of the second operational amplifier (72) are both connected with the 1.25V end (34), and the positive end of the first operational amplifier (71) and the positive end of the second operational amplifier (72) are respectively connected with the 5 pin and the 6 pin of the charging protection chip (61).
6. The charger of claim 3, wherein the charger is configured to intelligently identify a battery pack and switch charging voltage and current, and further configured to: the first comparator unit (81) comprises a first comparator (811), a negative end connecting resistor R25 of the first comparator (811) is connected with the 5V end (32), a positive end connecting resistor R22 of the first comparator (811) is connected with the ID end (41), an out end connecting resistor R27 of the first comparator (811) is connected with the first optical coupler (84), a negative end of the first comparator (811) is connected with a capacitor C21 and then grounded, two ends of the capacitor C21 are also connected with a resistor R26 in parallel, a resistor R24 is connected between the negative end and the out end of the first comparator (811), the resistor R24 is connected with the resistor R23 and then connected with the 5V end (32), and the resistor R22 is connected with the resistor R21 and then connected with the 5V end (32).
7. The charger of claim 6, wherein the charger is configured to intelligently identify a battery pack and switch charging voltage and current, and further configured to: the circuit structure of the second comparator unit (82) and the third comparator unit (83) is the same as that of the first comparator unit (81).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023197627.0U CN214958839U (en) | 2020-12-25 | 2020-12-25 | Charger capable of intelligently identifying battery pack and switching charging voltage and current |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023197627.0U CN214958839U (en) | 2020-12-25 | 2020-12-25 | Charger capable of intelligently identifying battery pack and switching charging voltage and current |
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| CN214958839U true CN214958839U (en) | 2021-11-30 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI790966B (en) * | 2022-05-10 | 2023-01-21 | 茂達電子股份有限公司 | Switching charger for supplying stable power |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI790966B (en) * | 2022-05-10 | 2023-01-21 | 茂達電子股份有限公司 | Switching charger for supplying stable power |
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