CN220306972U - Battery protection circuit and aerosol generating device - Google Patents
Battery protection circuit and aerosol generating device Download PDFInfo
- Publication number
- CN220306972U CN220306972U CN202321460685.9U CN202321460685U CN220306972U CN 220306972 U CN220306972 U CN 220306972U CN 202321460685 U CN202321460685 U CN 202321460685U CN 220306972 U CN220306972 U CN 220306972U
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- battery protection
- chip
- lithium battery
- lithium
- battery
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- 239000000443 aerosol Substances 0.000 title abstract description 7
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 93
- 229910052744 lithium Inorganic materials 0.000 claims description 93
- 238000001514 detection method Methods 0.000 claims description 27
- 239000003990 capacitor Substances 0.000 claims description 23
- 230000005611 electricity Effects 0.000 claims description 21
- 238000010586 diagram Methods 0.000 description 4
- 230000032683 aging Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Landscapes
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model belongs to the field of battery protection, and particularly relates to a battery protection circuit and an aerosol generating device. The scheme is connected with the grounding of the power supply through the negative electrode control, so that the protection of the battery is realized, compared with the traditional positive electrode control, the mode of the negative electrode control is realized, and when the battery is protected, the large voltage of the battery is not required to be overcome, and only the small voltage of the switching tube is required to be overcome.
Description
Technical Field
The utility model relates to the field of battery protection, in particular to a battery protection circuit and an aerosol generating device.
Background
The application of various functions of the aerosol generating device is not separated from the power supply of the battery, and when a charging circuit is subjected to input or output short circuit due to aging of a circuit or error of circuit connection, and the like, the battery is damaged on one hand, and even the battery in the aerosol generating device is ignited or exploded on the other hand, so that user experience is also influenced.
Disclosure of Invention
The utility model provides a battery protection circuit and an aerosol generating device, which are used for solving the problems that in the prior art, input or output short circuits are easy to occur due to aging of a charging circuit and the like in the use process of a battery, and overcharge or overdischarge phenomena occur.
The utility model provides a battery protection circuit, comprising: the lithium battery protection device comprises a first lithium battery protection unit and a battery, wherein the first lithium battery protection unit is provided with a first lithium battery protection chip, the first lithium battery protection chip is provided with a power end, a grounding end and a detection end, the power end is electrically connected with the positive electrode of the battery, the grounding end is electrically connected with the negative electrode of the battery, and the detection end is grounded.
Further, the first protection chip has six pins, the detection end has three pins, the ground end has two pins, and the power end has one pin.
Further, the model of the first lithium battery protection chip is XB6006A2 or MP2602.
Further, the first lithium battery protection unit is further provided with a protection resistor, one end of the protection resistor is electrically connected with the positive electrode of the battery, and the other end of the protection resistor is electrically connected with the power end of the first lithium battery protection chip.
Further, the first lithium battery protection unit is further provided with a filter capacitor, one end of the filter capacitor is electrically connected with the power end of the first lithium battery protection chip, and the other end of the filter capacitor is electrically connected with the grounding end of the first lithium battery protection chip.
Further, the battery protection circuit further includes: the second lithium electricity protection unit is provided with a second lithium electricity protection chip, the second lithium electricity protection chip is provided with a detection end, a power end and a grounding end, the detection end of the second lithium electricity protection chip is electrically connected with a system power supply end, the power end of the second lithium electricity protection chip is electrically connected with the positive electrode of the battery, and the grounding end of the second lithium electricity protection chip is grounded.
Further, the second lithium battery protection unit further comprises a filter capacitor, the second lithium battery protection chip is further provided with an internal power supply end, one end of the filter capacitor is electrically connected with the internal power supply end, and the other end of the filter capacitor is grounded.
Further, the battery protection circuit further comprises a charging control unit, wherein the charging control unit is provided with a charging chip, and the charging chip is provided with a power input end, a charging output end and a thermosensitive output end; the power input end of the charging chip is electrically connected with an external power supply, the charging output end is used as a system power supply end and is electrically connected with the detection end of the second lithium battery protection chip, and the thermosensitive output end of the charging chip is grounded after being connected with the protection resistor.
Further, the battery charging device also comprises an alarm circuit, wherein one end of the alarm circuit is connected with the charging chip, and the other end of the alarm circuit is grounded so that the first lithium battery protection chip and/or the second lithium battery protection chip can control the on-off of the alarm circuit according to the working state of the battery.
Further, the alarm circuit is provided with at least one of an LED display lamp, an LED display screen, a motor and a player.
The utility model also provides an aerosol-generating device comprising a battery protection circuit as described in any one of the above.
The beneficial effects are that: in the scheme, the grounding end of the first lithium battery protection unit is connected with the negative electrode of the power supply, the detection end is grounded, and the first lithium battery protection unit is connected with the grounding of the power supply through negative electrode control, so that the protection of a battery is realized, and compared with the traditional positive electrode control mode, the negative electrode control mode is capable of only overcoming small voltage of a switch tube without overcoming larger voltage of the battery when the battery is protected.
Drawings
FIG. 1 is a schematic diagram of a battery protection circuit according to an embodiment of the present utility model;
FIG. 2 is a schematic circuit diagram of the first lithium battery protection unit in FIG. 1;
FIG. 3 is a schematic circuit diagram of the second lithium battery protection unit in FIG. 1;
fig. 4 is a circuit schematic diagram of the charge control unit in fig. 1.
Detailed Description
The following is a further detailed description of the embodiments:
a first embodiment of the present utility model provides a battery protection circuit 10, as shown in fig. 1, including: the lithium battery protection device comprises a first lithium battery protection unit 101 and a battery 102, wherein the first lithium battery protection unit 101 is provided with a first lithium battery protection chip U2, the first lithium battery protection chip U2 is provided with a power end, a grounding end and a detection end, the power end is electrically connected with the positive electrode of the battery 102, the grounding end is electrically connected with the negative electrode of the battery 102, and the detection end is grounded.
The ground terminal of the first lithium battery protection unit 101 is connected with the negative electrode of the power supply, the detection terminal is grounded, and the first lithium battery protection unit 101 is connected with the ground of the power supply through negative electrode control, so that the protection of the battery 102 is realized, and compared with the traditional positive electrode control mode, the negative electrode control mode is capable of only overcoming small voltage of a switch tube without overcoming larger voltage of the battery 102 when the battery 102 is protected.
In some examples, battery 102 is a rechargeable battery, including lithium batteries, nickel-hydrogen batteries, nickel-chromium batteries, and other types of rechargeable batteries.
In some examples, the first protection chip U2 has six pins, the detection terminal has three pins, the ground terminal has two pins, and the power terminal has one pin. For example, the first lithium battery protection chip is of a model XB6006A2 or MP2602.
Specifically, as shown in fig. 2, the positive electrode of the BATTERY outputs the power supply voltage batteriy to the outside, the positive electrode of the BATTERY is electrically connected to the power supply terminal VDD of the first protection chip, the negative electrode of the BATTERY is electrically connected to the ground terminal GND of the first protection chip U2, and the 3 detection terminals of the first protection chip U2 are connected in parallel to each other and then connected to the ground line.
In some examples, the first lithium battery protection unit 101 is further provided with a protection resistor R1, one end of the protection resistor R1 is electrically connected to the positive electrode of the battery 102, and the other end of the protection resistor R1 is electrically connected to the power supply terminal VDD of the first lithium battery protection chip U2.
Specifically, as shown in fig. 2, the protection resistor R1 is disposed between the battery 102 and the power supply end of the first lithium battery protection chip U2, so that protection of the first lithium battery protection chip U2 can be effectively achieved, and the influence of a large current of the battery 102 on the first lithium battery protection chip U2 is reduced. That is, the output current of the battery 102 is unstable during the operation, especially, the large current caused by short-circuit fault, excessive power of the device, etc. easily has an adverse effect on the power supply end of the first lithium battery protection chip U2, and the service life of the first lithium battery protection chip U2 is reduced.
In some examples, the first lithium battery protection unit 101 is further provided with a filter capacitor C2, one end of the filter capacitor C2 is electrically connected to the power supply terminal VDD of the first lithium battery protection chip U2, and the other end of the filter capacitor C2 is electrically connected to the ground terminal GND of the first lithium battery protection chip U2. The filter capacitor C2 is arranged to avoid interference between circuits, so that the safety and stability of the circuits are improved.
Specifically, as shown in fig. 2, if the protection resistor R1 and the filter capacitor C2 are simultaneously provided, the positive electrode of the filter capacitor C2 is electrically connected to the protection resistor R1 near one side of the first lithium battery protection chip U2, and the negative electrode of the filter capacitor C2 is electrically connected to the ground line of the first lithium battery protection chip U2.
In some examples, the battery protection circuit 10, as shown in fig. 1 and 3, further includes: the second lithium electricity protection unit 103, the second lithium electricity protection unit 103 is equipped with second lithium electricity protection chip U1, second lithium electricity protection chip U1 has detection end VM, power end VDD and ground connection end GND, and the detection end VM of second lithium electricity protection chip U1 is connected with the system power supply end VCC_BAR electricity, and the power end VDD of second lithium electricity protection chip U1 is connected with battery positive electricity, and the ground connection end GND of second lithium electricity protection chip U1 is earthed.
The charging of the battery in this example is controlled by the second lithium battery protection chip U1 in the second lithium battery protection unit 103, and is turned onThe over-system power terminal vcc_bar charges the battery. The first protection chip U1 may determine whether the charging state is in an overcharged state by detecting a current or a voltage on a pin or an element thereof, and disconnect the vcc_bar from the battery 300 in the overcharged state, thereby protecting the battery 300. Specifically, when the charging state is in the overcharged state, the power output terminal VDD of the second lithium battery protection chip U1 exceeds the overcharged detection voltage V CU And the holding time exceeds the overcharge voltage detection delay time T CU When the voltage is lower than the threshold voltage, the switch tube inside the second lithium battery protection chip U1 is turned off, and the connection between the VCC_BAR and the battery 102 is disconnected, so that the battery 300 can be protected. Specifically, when the charging state is in the overcharge current state, the second lithium battery protection chip U1 detects that the charging current value exceeds the overcharge detection current value I OCC And the duration exceeds the overcharge current detection delay time T OCC The second lithium battery protection chip U1 will close the internal switching tube, breaking the connection between vcc_bar and the battery 102, so that the battery 102 can be protected.
In a further example, the second lithium battery protection unit 103 further includes a filter capacitor C1, the second lithium battery protection chip U1 is further provided with an internal power supply terminal VCC, one end of the filter capacitor C1 is electrically connected to the internal power supply terminal VCC, and the other end of the filter capacitor C1 is grounded. The filter capacitor C1 is intended to filter the internal voltage of the second lithium battery protection chip U1.
In a further example, the second lithium battery protection chip U1 is model CT2105.
In some examples, as shown in fig. 4, the battery protection circuit 10 further includes a charging control unit 104, where the charging control unit 104 is provided with a charging chip U3, and the charging chip U3 is provided with a power input terminal VIN, a charging output terminal BATT, and a thermal sensing terminal NTC; the power input end VIN of the charging chip U3 is electrically connected with an external power supply, the charging output end BATT is used as a system power supply end and is electrically connected with the detection end VM of the second lithium battery protection chip U1, and the thermosensitive detection end NTC of the charging chip U3 is connected with the protection resistor R4 and then grounded.
Specifically, the power input terminal VIN of the charging chip U3 of the charging control unit 104 is connected to the external power source J1/5V-IN, the charging output terminal BATT of the charging chip U3 is connected to the detection terminal VM of the second lithium battery protection chip U1, and the power output terminal VDD of the second lithium battery protection chip U1 is connected to the positive electrode of the battery 300, so that after the charging chip U3 receives the external power source, a charging voltage or a charging current can be output and the battery is charged through the conducted second lithium battery protection chip U1. In one embodiment, the voltage of the positive electrode of the battery can be obtained according to the conducted second lithium battery protection chip U1, and whether the battery is full or not can be judged, so that corresponding current can be output. The connection mode with the external power supply can be, but not limited to, TYPE EC, USB, wireless charging and multiple charging terminals and the like.
In a further example, the charging control unit 104 further includes an alarm circuit, where one end of the alarm circuit is connected to the charging chip U3, and the other end of the alarm circuit is grounded, and the alarm circuit is used for alarming the current working state of the battery 102. In detail, the alarm circuit is provided with at least one of an LED display lamp, an LED display screen, a motor and a player.
In this case, when the first lithium battery protection unit 101 or the second lithium battery protection unit 103 detects that the battery 102 is overcharged or overdischarged, the alarm circuit will send a prompt, and the prompt information includes an LED, text, an image, vibration or voice, etc. Whether the LED display lamp is lighted to transmit prompt information, the LED display screen is used for displaying characters and patterns, the motor is used for vibrating, and the player is used for playing preset recorded voice, preferably, the LED display lamp is adopted in the embodiment.
The first end of the brightness setting resistor R2 is connected with the power input end VIN of the charging chip U3, the second end of the brightness setting resistor R2 is connected with the anode of the LED display lamp, the cathode of the LED display lamp is connected with the VIN of the charging chip U3, the brightness setting resistor R2 is connected with the LED display lamp in series, and the current of the LED display lamp connected in series can be determined through the resistance value of the brightness setting resistor R2, so that the brightness of the LED display lamp is set. Therefore, the first voltage dividing resistor R3 is connected with the protection resistor R4 in series, then the voltage division of the first voltage dividing resistor R3 and the protection resistor R4 can be provided for the thermosensitive detection end NTC of the charging chip U3, and the protection resistor R4 can adopt a thermosensitive resistor to realize the adjustment of voltage or current at temperature. The first end of the first resistor R5 is connected with the lighting time setting end IBF of the charging chip U3, the second end of the first resistor R5 is grounded, and the first resistor R5 can be used for adjusting the lighting time of the LED lamp. The first end of the second resistor R6 is connected to the charging current setting end ISET of the charging chip U3, the second end of the second resistor R6 is grounded, and the second resistor R6 can be used to set the charging current.
In addition, in this example, the charging control unit 104 charges the chip and is provided with a CHRG pin to directly control the LED, or the MCU detects the state of the CHRG pin to control the LED. The charging control unit 104 may be separately provided, or an MCU may be used instead of the charging chip.
Second embodiment:
a second embodiment of the utility model provides an aerosol-generating device comprising a battery protection circuit as described in any of the above. The battery protection circuit has the advantages that the battery is controlled to be output outwards at the negative end through the first protection chip U2 in the battery protection circuit, so that overdischarge is avoided, and the charging circuit of the battery is automatically disconnected through the second protection chip U1, so that overcharge is avoided.
The foregoing is merely an embodiment of the present utility model, and a specific structure and characteristics of common knowledge in the art, which are well known in the scheme, are not described herein, so that a person of ordinary skill in the art knows all the prior art in the application day or before the priority date of the present utility model, and can know all the prior art in the field, and have the capability of applying the conventional experimental means before the date, so that a person of ordinary skill in the art can complete and implement the present embodiment in combination with his own capability in the light of the present application, and some typical known structures or known methods should not be an obstacle for a person of ordinary skill in the art to implement the present application. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present utility model, and these should also be considered as the scope of the present utility model, which does not affect the effect of the implementation of the present utility model and the utility of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.
Claims (10)
1. A battery protection circuit, comprising: the lithium battery protection device comprises a first lithium battery protection unit and a battery, wherein the first lithium battery protection unit is provided with a first lithium battery protection chip, the first lithium battery protection chip is provided with a power end, a grounding end and a detection end, the power end is electrically connected with the positive electrode of the battery, the grounding end is electrically connected with the negative electrode of the battery, and the detection end is grounded.
2. The battery protection circuit of claim 1, wherein: the model of the first lithium battery protection chip is XB6006A2 or MP2602.
3. The battery protection circuit of claim 1, wherein: the first lithium battery protection unit is further provided with a protection resistor, one end of the protection resistor is electrically connected with the positive electrode of the battery, and the other end of the protection resistor is electrically connected with the power end of the first lithium battery protection chip.
4. The battery protection circuit of claim 1, wherein: the first lithium battery protection unit is further provided with a filter capacitor, one end of the filter capacitor is electrically connected with the power end of the first lithium battery protection chip, and the other end of the filter capacitor is electrically connected with the grounding end of the first lithium battery protection chip.
5. The battery protection circuit of claim 1, wherein the battery protection circuit further comprises: the second lithium electricity protection unit is provided with a second lithium electricity protection chip, the second lithium electricity protection chip is provided with a detection end, a power end and a grounding end, the detection end of the second lithium electricity protection chip is electrically connected with a system power supply end, the power end of the second lithium electricity protection chip is electrically connected with the positive electrode of the battery, and the grounding end of the second lithium electricity protection chip is grounded.
6. The battery protection circuit of claim 5, wherein: the second lithium battery protection unit further comprises a filter capacitor, the second lithium battery protection chip is further provided with an internal power supply end, one end of the filter capacitor is electrically connected with the internal power supply end, and the other end of the filter capacitor is grounded.
7. The battery protection circuit according to claim 5, further comprising a charging control unit, wherein the charging control unit is provided with a charging chip, and the charging chip is provided with a power input end, a charging output end and a heat sensitive output end; the power input end of the charging chip is electrically connected with an external power supply, the charging output end is used as a system power supply end and is electrically connected with the detection end of the second lithium battery protection chip, and the thermosensitive output end of the charging chip is grounded after being connected with the protection resistor.
8. The battery protection circuit according to claim 7, further comprising an alarm circuit, wherein one end of the alarm circuit is connected with the charging chip, and the other end of the alarm circuit is grounded, so that the first lithium battery protection chip and/or the second lithium battery protection chip can control the on-off of the alarm circuit according to the working state of the battery.
9. The battery protection circuit of claim 8, wherein the alarm circuit is provided with at least one of an LED display, an LED display screen, a motor, and a player.
10. An aerosol-generating device comprising a battery protection circuit according to any of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321460685.9U CN220306972U (en) | 2023-06-08 | 2023-06-08 | Battery protection circuit and aerosol generating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321460685.9U CN220306972U (en) | 2023-06-08 | 2023-06-08 | Battery protection circuit and aerosol generating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220306972U true CN220306972U (en) | 2024-01-05 |
Family
ID=89352259
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321460685.9U Active CN220306972U (en) | 2023-06-08 | 2023-06-08 | Battery protection circuit and aerosol generating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220306972U (en) |
-
2023
- 2023-06-08 CN CN202321460685.9U patent/CN220306972U/en active Active
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