CN216016486U - Battery protection circuit for inflator pump - Google Patents
Battery protection circuit for inflator pump Download PDFInfo
- Publication number
- CN216016486U CN216016486U CN202122111923.2U CN202122111923U CN216016486U CN 216016486 U CN216016486 U CN 216016486U CN 202122111923 U CN202122111923 U CN 202122111923U CN 216016486 U CN216016486 U CN 216016486U
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- Prior art keywords
- lithium battery
- resistor
- control unit
- battery
- transistor
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 94
- 229910052744 lithium Inorganic materials 0.000 claims abstract description 94
- 238000005070 sampling Methods 0.000 claims abstract description 24
- 230000002441 reversible effect Effects 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 4
- 239000003381 stabilizer Substances 0.000 claims abstract description 4
- 230000005669 field effect Effects 0.000 claims description 51
- 239000003990 capacitor Substances 0.000 claims description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 7
- 235000019506 cigar Nutrition 0.000 description 3
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910001416 lithium ion Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Abstract
The utility model provides a battery protection circuit for pump, including lithium electric core group, battery sampling unit, the main control unit, lithium battery protection unit and lithium battery charging control unit, lithium electric core group and battery sampling unit electric connection, battery sampling unit and main control unit electric connection, main control unit and lithium battery protection unit electric connection, battery sampling unit is used for realizing the current sampling, the main control unit is used for system control, lithium battery protection unit is used for controlling discharge and prevents that the battery from reverse charging, lithium electric core group and lithium battery charging control unit electric connection, lithium battery charging control unit is used for controlling the charging process of lithium electric core group, lithium battery charging control unit has lithium battery boost circuit through stabiliser electric connection, lithium battery boost circuit is used for providing the constant current output for the system power supply. The utility model discloses can play discharge protection and prevent the effect that the battery interface reversed charging.
Description
Technical Field
The utility model relates to a battery protection technical field, concretely relates to battery protection circuit for pump.
Background
At present, a plurality of lithium batteries are increasingly commonly used in series, the battery core group and the protection board thereof are integrated in many application occasions, and the electric quantity management of the battery core is very important. Because the voltage of a single lithium battery is low, multiple battery cores are generally required to be connected in series for application in the field with high voltage requirement. For all reasons, the charging and discharging working voltage, the working current and the cell temperature of the lithium battery must be strictly controlled within an accurate range, so that the service life and the use safety of the lithium battery can be ensured. The protection scheme of the high-performance lithium battery draws more and more attention from people, and the protection board is designed mainly by highlighting the functions of overcharge, overdischarge, temperature protection and the like, controlling the cost, and designing the complexity of the production process and the like.
SUMMERY OF THE UTILITY MODEL
In view of the above, the present invention provides a battery protection circuit for an inflator.
In order to solve the technical problem, the utility model discloses a technical scheme is: a battery protection circuit for an inflator pump comprises a lithium battery core group, a battery sampling unit, a main control unit, a lithium battery protection unit and a lithium battery charging control unit, the lithium battery cell group is electrically connected with the battery sampling unit, the battery sampling unit is electrically connected with the main control unit, the main control unit is electrically connected with the lithium battery protection unit, the battery sampling unit is used for realizing current sampling, the main control unit is used for system control, the lithium battery protection unit is used for controlling discharge and preventing the reverse charge of the battery, the lithium battery cell group is electrically connected with the lithium battery charging control unit, the lithium battery charging control unit is used for controlling the charging process of the lithium battery cell group, the lithium battery charging control unit is electrically connected with a lithium battery booster circuit through the voltage stabilizer, and the lithium battery booster circuit is used for providing constant current output for system power supply.
In the utility model discloses, preferably, lithium battery protection unit includes field effect transistor Q9 and field effect transistor Q10, it has a diode to connect in parallel respectively between field effect transistor Q9 and field effect transistor Q10's source electrode and the drain electrode, it has resistance R21 and resistance R32 to connect in parallel respectively between field effect transistor Q9 and field effect transistor Q10's grid and the source electrode, field effect transistor Q9 and field effect transistor Q10's grid is external respectively has discharge protection circuit and prevents the reverse charging circuit.
In the utility model discloses, preferably, the discharge protection circuit is the same with preventing reverse charging circuit, the discharge protection circuit includes triode Q7, triode Q8, resistance R17, resistance R18, resistance R19 and resistance R20, triode Q7's collecting electrode pass through resistance R20 with field effect transistor Q9's grid links to each other, triode Q7's base passes through resistance R17 and links to each other with its collecting electrode, just triode Q7's base pass through resistance R18 with triode Q8's collecting electrode links to each other, triode Q8's base passes through resistance R19 and links to each other with the central control unit.
The utility model discloses in, preferably, the main control unit adopts the singlechip as the main control board, the singlechip is external to be used for providing the indicator light unit of lithium cell group charge state suggestion.
The utility model discloses in, preferably, main control unit still electric connection has the temperature control unit that is used for realizing temperature acquisition, the temperature control unit includes temperature sensor, resistance R27 and electric capacity C8, and the P2.6 port of singlechip is respectively through temperature sensor and electric capacity C8 ground connection, the P2.6 port of singlechip passes through the external VCC terminal of resistance R27.
The utility model discloses in, preferably, lithium cell boost circuit includes boost chip, resistance R10, field effect transistor Q3 and connects in parallel in the diode between its source electrode and drain electrode, field effect transistor Q3 the source electrode with resistance R10's one end links to each other, and resistance R10's the other end is external to have the USB interface, the field effect transistor is external to have the switch control line through contact switch, field effect transistor Q3's drain electrode passes through inductance, triode Q4 and links to each other with the VDD pin of boost chip.
IN the present invention, preferably, the gate of the fet Q3 is connected to the collector of the transistor Q2 through the resistor R7, the emitter of the transistor Q2 is connected to the IN + terminal, and the emitter of the transistor Q2 is connected to the base through the resistor R5.
In the present invention, preferably, the P1.0 port of the single chip microcomputer is connected to the positive electrode of the lithium battery cell set through a transistor Q1.
The utility model discloses in, preferably, the lithium cell group sets up the lithium cell of three section series connection, the battery sampling unit includes that first fortune is put and the second fortune is put, the normal phase input end that first fortune was put with the normal phase input end that the second fortune was put links to each other with the positive pole of its one of them lithium cell respectively, the inverting input end that first fortune was put links to each other with its output, the inverting input that the second fortune was put links to each other with its output, the output that first fortune was put passes through resistance R5 and links to each other with the P2.5 pin of singlechip, the output that the second fortune was put passes through resistance R3 and links to each other with the P2.4 pin of singlechip.
The utility model discloses IN, preferably, the VCC terminal that the second fortune was put passes through triode Q3 and links to each other with the positive pole of lithium cell, triode Q3's collecting electrode is external to have IN + terminal.
The utility model has the advantages and positive effects that: the utility model discloses a set up the damage that lithium battery protection unit can avoid the battery package, can play discharge protection and prevent the reverse effect of charging of battery interface to lithium cell group through setting up field effect transistor Q9 and field effect transistor Q10, if do not set up field effect transistor Q9 then can damage the board. When the contact switch is pressed down, the switch control line is switched on, constant current output can be realized through mutual matching of the boosting chip, the resistor R3 and the field-effect transistor Q3, the input voltage can be monitored through constant power output, and the power is automatically reduced when the voltage is not reached.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a functional block diagram of a battery protection circuit for an inflator of the present invention;
FIG. 2 is a schematic circuit diagram of a battery sampling unit for a battery protection circuit of an inflator of the present invention;
fig. 3 is a schematic circuit diagram of a lithium battery charging control unit for a battery protection circuit of an inflator according to the present invention;
FIG. 4 is a schematic circuit diagram of a main control unit of a battery protection circuit for an inflator of the present invention;
FIG. 5 is a schematic circuit diagram of a lithium battery protection unit for a battery protection circuit of an inflator according to the present invention;
FIG. 6 is a schematic circuit diagram of a temperature control unit for a battery protection circuit of an inflator;
fig. 7 is a schematic diagram of a lithium battery booster circuit for a battery protection circuit of an inflator.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, the utility model provides a battery protection circuit for pump, including lithium cell group, battery sampling unit, the main control unit, lithium battery protection unit and lithium battery charging control unit, lithium cell group and battery sampling unit electric connection, battery sampling unit and main control unit electric connection, main control unit and lithium battery protection unit electric connection, battery sampling unit is used for realizing the current sampling, the main control unit is used for system control, lithium battery protection unit is used for controlling discharge and prevents that the battery from reverse charging, lithium cell group and lithium battery charging control unit electric connection, lithium battery charging control unit is used for controlling the charging process of lithium cell group, lithium battery charging control unit passes through stabiliser electric connection and has lithium battery boost circuit, lithium battery boost circuit is used for providing constant current output for the system power supply.
As shown in fig. 5, in the present embodiment, further, the lithium battery protection unit includes a field effect transistor Q9 and a field effect transistor Q10, a diode is respectively connected in parallel between the source and the drain of the field effect transistor Q9 and the field effect transistor Q10, a resistor R21 and a resistor R32 are respectively connected in parallel between the gate and the source of the field effect transistor Q9 and the field effect transistor Q10, and a discharge protection circuit and an anti-reverse charging circuit are respectively connected to the gates of the field effect transistor Q9 and the field effect transistor Q10 externally. Wherein, P-is the negative output terminal, P + is the positive output terminal, and a diode is connected in parallel between the source and the drain of the fet Q9 and the fet Q10, so as to protect the fet Q9 and the fet Q10.
In this embodiment, further, the discharge protection circuit is the same as the anti-reverse charging circuit, the discharge protection circuit includes a transistor Q7, a transistor Q8, a resistor R17, a resistor R18, a resistor R19 and a resistor R20, a collector of the transistor Q7 is connected to the gate of the fet Q9 through a resistor R20, a base of the transistor Q7 is connected to the collector thereof through a resistor R17, a base of the transistor Q7 is connected to a collector of the transistor Q8 through a resistor R18, and a base of the transistor Q8 is connected to the central control unit through a resistor R19.
As shown in fig. 4, in this embodiment, further, the main control unit adopts a single chip as a main control board, and the single chip is externally connected with an indicator light unit for providing a prompt of the charging state of the lithium battery pack. The pilot lamp unit is connected with P1.6, P1.7 and P2.7 pin of singlechip respectively through resistance R28, resistance R34 and resistance R35, and the pilot lamp unit can reflect the charge-discharge condition and the current running state of lithium electric core group.
As shown in fig. 6, in this embodiment, further, the main control unit is electrically connected to a temperature control unit for acquiring temperature, the temperature control unit includes a temperature sensor, a resistor R27 and a capacitor C8, a P2.6 port of the single chip is grounded through the temperature sensor and the capacitor C8, respectively, and the P2.6 port of the single chip is externally connected to the VCC terminal through the resistor R27.
As shown in fig. 7, in this embodiment, further, the lithium battery boost circuit includes a boost chip, a resistor R10, a field-effect transistor Q3, and a diode connected in parallel between a source and a drain of the field-effect transistor Q3578, a source of the field-effect transistor Q3 is connected to one end of the resistor R10, the other end of the resistor R10 is externally connected to a USB interface, the field-effect transistor is externally connected to a switch control line through a contact switch, and a drain of the field-effect transistor Q3 is connected to a VDD pin of the boost chip through an inductor and a triode Q4. The DC + is a charging positive terminal, the DC-is a charging negative terminal, constant current output can be realized through mutual matching of the boosting chip, the resistor R3 and the field-effect tube Q3, input voltage can be monitored through constant power output, power is automatically reduced when the voltage is not reached, and the diode connected between the source electrode and the drain electrode of the field-effect tube Q3 in parallel can play a role in protecting the field-effect tube Q3.
IN this embodiment, the gate of the fet Q3 is further externally connected to the collector of the transistor Q2 through the resistor R7, the emitter of the transistor Q2 is externally connected to the IN + terminal, and the emitter of the transistor Q2 is connected to the base thereof through the resistor R5. As shown in fig. 3, the B + terminal is an output positive terminal of the lithium battery cell group, the positive terminal of the lithium battery cell group is connected to a drain of a field effect transistor Q5 through a diode D1, a source of the field effect transistor Q5 is connected to a collector of a triode Q6 through a resistor R11 and a resistor R12, a base of the triode Q6 is externally connected with an OC terminal through a resistor R13, and the OC terminal is connected to a P0.4 port of the single chip microcomputer to realize charging control of the lithium battery.
In this embodiment, further, a P1.0 port of the single chip microcomputer is connected to the positive electrode of the lithium battery cell group through a transistor Q1, and the P1.0 port of the single chip microcomputer is used for supplying power to the system.
As shown in fig. 2, in this embodiment, further, the lithium battery cell group is a three-section lithium battery cell connected in series, the battery sampling unit includes a first operational amplifier and a second operational amplifier, a positive phase input terminal of the first operational amplifier and a positive phase input terminal of the second operational amplifier are respectively connected to a positive electrode of one of the lithium battery cells, an inverted phase input terminal of the first operational amplifier is connected to an output terminal of the first operational amplifier, an inverted phase input terminal of the second operational amplifier is connected to an output terminal of the second operational amplifier, an output terminal of the first operational amplifier is connected to a P2.5 pin of the single chip microcomputer through a resistor R5, and an output terminal of the second operational amplifier is connected to a P2.4 pin of the single chip microcomputer through a resistor R3.
IN this embodiment, the VCC terminal of the second operational amplifier is connected to the positive electrode of the lithium battery cell through a transistor Q3, and the collector of the transistor Q3 is externally connected to the IN + terminal.
The utility model discloses requirement according to GA01 pump protection board and design, be applicable to different chemical properties's lithium cell, like lithium ion, ternary lithium, it has 3 economize on electricity core series protection, discharge protection function, overflows, overheated, short circuit protection function, possesses the characteristics of static low power dissipation. Battery package discharge port is with mouthful with cigar lighter mouth, contact cigar lighter under the condition that will start the battery package during use as far as possible, in order to avoid causing the cigar lighter to the impact in the twinkling of an eye of battery package, can avoid the damage of battery package through setting up lithium cell protection unit, can play discharge protection and prevent the effect that battery interface reverse charging to the lithium cell group through setting up field effect transistor Q9 and field effect transistor Q10, if do not set up field effect transistor Q9 then can damage the board. When the contact switch is pressed down, the switch control line is switched on, constant current output can be realized through mutual matching of the boosting chip, the resistor R3 and the field-effect transistor Q3, the input voltage can be monitored through constant power output, and the power is automatically reduced when the voltage is not reached.
The embodiments of the present invention have been described in detail, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be covered by the present patent.
Claims (10)
1. A battery protection circuit for an inflator pump is characterized by comprising a lithium battery core group, a battery sampling unit, a main control unit, a lithium battery protection unit and a lithium battery charging control unit, the lithium battery cell group is electrically connected with the battery sampling unit, the battery sampling unit is electrically connected with the main control unit, the main control unit is electrically connected with the lithium battery protection unit, the battery sampling unit is used for realizing current sampling, the main control unit is used for system control, the lithium battery protection unit is used for controlling discharge and preventing the reverse charge of the battery, the lithium battery cell group is electrically connected with the lithium battery charging control unit, the lithium battery charging control unit is used for controlling the charging process of the lithium battery cell group, the lithium battery charging control unit is electrically connected with a lithium battery booster circuit through the voltage stabilizer, and the lithium battery booster circuit is used for providing constant current output for system power supply.
2. The battery protection circuit for the inflator according to claim 1, wherein the lithium battery protection unit comprises a field effect transistor Q9 and a field effect transistor Q10, a diode is respectively connected in parallel between the source and the drain of the field effect transistor Q9 and the field effect transistor Q10, a resistor R21 and a resistor R32 are respectively connected in parallel between the gate and the source of the field effect transistor Q9 and the field effect transistor Q10, and a discharge protection circuit and an anti-reverse charging circuit are respectively connected externally to the gates of the field effect transistor Q9 and the field effect transistor Q10.
3. The battery protection circuit for the inflator according to claim 2, wherein the discharge protection circuit is the same as the anti-reverse charging circuit, the discharge protection circuit comprises a transistor Q7, a transistor Q8, a resistor R17, a resistor R18, a resistor R19 and a resistor R20, a collector of the transistor Q7 is connected with a gate of the fet Q9 through a resistor R20, a base of the transistor Q7 is connected with a collector thereof through a resistor R17, a base of the transistor Q7 is connected with a collector of the transistor Q8 through a resistor R18, and a base of the transistor Q8 is connected with the central control unit through a resistor R19.
4. The battery protection circuit for the inflator pump according to claim 1, wherein a single chip microcomputer is adopted as a main control board in the main control unit, and an indicator light unit for providing a prompt of the charging state of the lithium battery pack is externally connected to the single chip microcomputer.
5. The battery protection circuit for the inflator pump of claim 1, wherein the main control unit is further electrically connected with a temperature control unit for achieving temperature collection, the temperature control unit comprises a temperature sensor, a resistor R27 and a capacitor C8, the single chip microcomputer is grounded through the temperature sensor and the capacitor C8, and the single chip microcomputer is externally connected with a VCC terminal through the resistor R27.
6. The battery protection circuit for the inflator pump of claim 1, wherein the lithium battery booster circuit comprises a booster chip, a resistor R10, a field effect transistor Q3 and a diode connected in parallel between a source electrode and a drain electrode of the resistor, the source electrode of the field effect transistor Q3 is connected with one end of the resistor R10, the other end of the resistor R10 is externally connected with a USB interface, the field effect transistor is externally connected with a switch control line through a contact switch, and the drain electrode of the field effect transistor Q3 is connected with a VDD pin of the booster chip through an inductor and a triode Q4.
7. The battery protection circuit of claim 6, wherein the gate of said fet Q3 is externally connected to the collector of a transistor Q2 through a resistor R7, the emitter of said transistor Q2 is externally connected to the IN + terminal, and the emitter of said transistor Q2 is connected to the base thereof through a resistor R5.
8. The battery protection circuit for the inflator according to claim 4, wherein the single chip microcomputer is connected with the positive electrode of the lithium battery pack through a transistor Q1.
9. The battery protection circuit for the inflator pump according to claim 7, wherein the lithium battery cell group is a three-section lithium battery cell in series, the battery sampling unit comprises a first operational amplifier and a second operational amplifier, a positive phase input end of the first operational amplifier and a positive phase input end of the second operational amplifier are respectively connected with a positive electrode of one of the lithium battery cells, a negative phase input end of the first operational amplifier is connected with an output end of the first operational amplifier, a negative phase input end of the second operational amplifier is connected with an output end of the second operational amplifier, an output end of the first operational amplifier is connected with the single chip microcomputer through a resistor R5, and an output end of the second operational amplifier is connected with the single chip microcomputer through a resistor R3.
10. The battery protection circuit of claim 9, wherein the VCC terminal of the second operational amplifier is connected to the positive terminal of the lithium battery cell through a transistor Q3, and the collector of the transistor Q3 is externally connected to an IN + terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122111923.2U CN216016486U (en) | 2021-08-31 | 2021-08-31 | Battery protection circuit for inflator pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122111923.2U CN216016486U (en) | 2021-08-31 | 2021-08-31 | Battery protection circuit for inflator pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216016486U true CN216016486U (en) | 2022-03-11 |
Family
ID=80593697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122111923.2U Expired - Fee Related CN216016486U (en) | 2021-08-31 | 2021-08-31 | Battery protection circuit for inflator pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216016486U (en) |
-
2021
- 2021-08-31 CN CN202122111923.2U patent/CN216016486U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220311 |