CN219801962U - Multi-lithium battery charger - Google Patents
Multi-lithium battery charger Download PDFInfo
- Publication number
- CN219801962U CN219801962U CN202222768812.3U CN202222768812U CN219801962U CN 219801962 U CN219801962 U CN 219801962U CN 202222768812 U CN202222768812 U CN 202222768812U CN 219801962 U CN219801962 U CN 219801962U
- Authority
- CN
- China
- Prior art keywords
- module
- battery
- switching power
- power supply
- integrated circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 23
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims abstract description 17
- 238000001514 detection method Methods 0.000 claims description 34
- 238000005070 sampling Methods 0.000 claims description 6
- 238000007600 charging Methods 0.000 abstract description 11
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 230000003287 optical effect Effects 0.000 description 5
- 238000010280 constant potential charging Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000010277 constant-current charging Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model discloses a multi-lithium battery charger, which relates to the field of lithium battery charging, and comprises: the primary side module of the switching power supply is used for introducing alternating current and outputting the alternating current to the secondary side module of the switching power supply; the secondary side module of the switching power supply is used for converting alternating current into direct current to charge a battery; the MOS control module is used for receiving the control of the MCU module and controlling the conduction of the secondary side module of the switching power supply and the battery loop; compared with the prior art, the utility model has the beneficial effects that: the TL431 used for controlling the feedback optocoupler by the original switching power supply is replaced by the internal feedback control circuit of the MCU, and the MCU directly controls the current and the voltage flowing into the battery through controlling the feedback of the optocoupler, so that the traditional BUCK circuit is omitted, the purpose of simplifying the circuit and improving the efficiency is achieved, the charging control of multiple strings of lithium batteries can be realized efficiently and at low cost, and the circuit is simple, high in efficiency and less in heating.
Description
Technical Field
The utility model relates to the field of lithium battery charging, in particular to a multi-lithium battery charger.
Background
Lithium battery charging can generally be divided into four phases, namely trickle charging, constant Current Charging (CC), constant voltage Charging (CV), and charge termination.
Direct current is needed in the whole charging process, and at present, an AC alternating current is firstly converted into direct current through a switching power supply through synchronous rectification, and the primary side and the secondary side of the switching power supply control optocoupler feedback through TL 431; after converting alternating current into direct current, each charging link of the lithium battery is realized by a BUCK circuit controlled by an MCU, wherein the four charging stages are realized by the MCU to output PWM control BUCK.
The circuit is relatively complex, has high cost and needs to be used for a BUCK circuit, has high requirements on MOS and PWM, has low charging efficiency, generates large heat in the charging process, generates large loss on a lithium battery and a circuit device, and needs to be improved.
Disclosure of Invention
The present utility model is directed to a multi-cell lithium battery charger, which solves the above-mentioned problems of the prior art.
In order to achieve the above purpose, the present utility model provides the following technical solutions:
a multiple lithium battery charger comprising:
the primary side module of the switching power supply is used for introducing alternating current and outputting the alternating current to the secondary side module of the switching power supply;
the secondary side module of the switching power supply is used for converting alternating current into direct current to charge a battery;
the MOS control module is used for receiving the control of the MCU module and controlling the conduction of the secondary side module of the switching power supply and the battery loop;
the battery voltage detection module is used for sampling the voltage of the battery and outputting the voltage to the MCU module;
the battery current detection module is used for sampling the current of the battery and outputting the current to the MCU module;
the MCU module is used for comprehensively controlling the circuit;
the LED module is used for receiving the control of the MCU module and indicating the working state of the circuit;
the primary side module of the switching power supply is connected with the secondary side module of the switching power supply, the secondary side module of the switching power supply is connected with the MOS control module, the MOS control module is connected with the battery, the battery is connected with the battery voltage detection module and the battery current detection module, the battery voltage detection module is connected with the MCU module, the battery current detection module is connected with the MCU module, and the MCU module is connected with the MOS control module and the LED module.
As still further aspects of the utility model: the MCU module comprises an integrated circuit U1, wherein a VBUS CTRL pin of the integrated circuit U1 IS connected with the MOS control module, an IS-IN pin and an IS-P pin of the integrated circuit U1 are connected with the battery current detection module, a VBAT pin of the integrated circuit U1 IS connected with the battery voltage detection module, a CATH pin of the integrated circuit U1 IS connected with the switching power supply module, and the model of the integrated circuit U1 IS 5732.
As still further aspects of the utility model: the MOS control module comprises a MOS tube Q1 and an electron R4, wherein the D electrode of the MOS tube Q1 is connected with one end of a resistor R4 and a secondary side module of a switching power supply, the other end of the electron R4 is connected with the G electrode of the MOS tube Q1 and the VBUS CTRL pin of the integrated circuit U1, and the S electrode of the MOS tube Q1 is connected with the positive electrode of the battery BT 1.
As still further aspects of the utility model: the battery voltage detection module comprises a resistor R5, one end of the resistor R5 is connected with the positive electrode of the battery BT1, and the other end of the resistor R5 is connected with the VBAT pin of the integrated circuit U1.
As still further aspects of the utility model: the battery current detection module comprises a resistor RK, a first end of the resistor RK IS grounded, a first end of the resistor RK IS connected with an IS-P pin of the integrated circuit U1, a second end of the resistor RK IS connected with an IS-IN pin of the integrated circuit U1, and a negative electrode of the battery BT 1.
As still further aspects of the utility model: the secondary side module of the switching power supply comprises an optical coupler IC1, wherein a first end of the optical coupler IC1 is connected with 5V voltage through a resistor R6, a second end of the optical coupler IC1 is connected with a CATH pin of an integrated circuit U1, a fourth end of the optical coupler IC1 is grounded, a third end of the optical coupler is connected with a first end of a chip 3844, and a sixth end of the chip 3844 controls the conduction of a MOS tube Q2.
Compared with the prior art, the utility model has the beneficial effects that: the TL431 used for controlling the feedback optocoupler by the original switching power supply is replaced by the internal feedback control circuit of the MCU, and the MCU directly controls the current and the voltage flowing into the battery through controlling the feedback of the optocoupler, so that the traditional BUCK circuit is omitted, the purpose of simplifying the circuit and improving the efficiency is achieved, the charging control of multiple strings of lithium batteries can be realized efficiently and at low cost, and the circuit is simple, high in efficiency and less in heating.
Drawings
Fig. 1 is a schematic circuit diagram of a multiple lithium battery charger.
Fig. 2 is a detailed circuit diagram of a multiple lithium battery charger.
Detailed Description
The technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and all other embodiments obtained by those skilled in the art without making creative efforts based on the embodiments of the present utility model are included in the protection scope of the present utility model.
Referring to fig. 1, a multi-section lithium battery charger includes:
the primary side module of the switching power supply is used for introducing alternating current and outputting the alternating current to the secondary side module of the switching power supply;
the secondary side module of the switching power supply is used for converting alternating current into direct current to charge a battery;
the MOS control module is used for receiving the control of the MCU module and controlling the conduction of the secondary side module of the switching power supply and the battery loop;
the battery voltage detection module is used for sampling the voltage of the battery and outputting the voltage to the MCU module;
the battery current detection module is used for sampling the current of the battery and outputting the current to the MCU module;
the MCU module is used for comprehensively controlling the circuit;
the LED module is used for receiving the control of the MCU module and indicating the working state of the circuit;
the primary side module of the switching power supply is connected with the secondary side module of the switching power supply, the secondary side module of the switching power supply is connected with the MOS control module, the MOS control module is connected with the battery, the battery is connected with the battery voltage detection module and the battery current detection module, the battery voltage detection module is connected with the MCU module, the battery current detection module is connected with the MCU module, and the MCU module is connected with the MOS control module and the LED module.
In this embodiment: referring to fig. 2, the mcu module includes an integrated circuit U1, a VBUS CTRL pin of the integrated circuit U1 IS connected to the MOS control module, an IS-IN pin and an IS-P pin of the integrated circuit U1 are connected to the battery current detection module, a VBAT pin of the integrated circuit U1 IS connected to the battery voltage detection module, a CATH pin of the integrated circuit U1 IS connected to the switching power module, and the model of the integrated circuit U1 IS 5732.
The MCU module controls the output current and voltage of the secondary side module of the switching power supply by controlling the on/off of the optocoupler IC1, so that the traditional BUCK circuit is omitted, and the purpose of simplifying the circuit and improving the efficiency is achieved. The MCU module controls whether the secondary side module of the switching power supply charges the battery BT1 or not by controlling whether the MOS control module is conducted or not. The MCU module monitors the charge state of the battery BT1 by receiving signals of the battery voltage detection module and the battery current detection module.
In this embodiment: referring to fig. 2, the MOS control module includes a MOS transistor Q1 and an electron R4, wherein a D electrode of the MOS transistor Q1 is connected to one end of a resistor R4 and a secondary side module of the switching power supply, the other end of the electron R4 is connected to a G electrode of the MOS transistor Q1 and a VBUS CTRL pin of the integrated circuit U1, and an S electrode of the MOS transistor Q1 is connected to a positive electrode of the battery BT 1.
When the VBUS CTRL pin of the integrated circuit U1 is at a low level, the G pole voltage of the MOS tube Q1 is pulled down, and the MOS tube Q1 is cut off; when the VBUS CTRL pin of the integrated circuit U1 is in a high level, the G pole voltage of the MOS tube Q1 is in a high level, the MOS tube Q1 is conducted, and the secondary side module of the switching power supply charges the battery BT1 through the MOS tube Q1.
In this embodiment: referring to fig. 2, the battery voltage detection module includes a resistor R5, one end of the resistor R5 is connected to the positive electrode of the battery BT1, and the other end of the resistor R5 is connected to the VBAT pin of the integrated circuit U1.
In this embodiment: referring to fig. 2, the battery current detection module includes a resistor RK, a first end of the resistor RK IS grounded, a first end of the resistor RK IS connected to an IS-P pin of the integrated circuit U1, a second end of the resistor RK IS connected to an IS-IN pin of the integrated circuit U1, and a negative electrode of the battery BT 1.
The voltage drop across the resistor RK is collected, and the resistance value of the resistor RK is determined, so that the current of the battery BT1 is determined.
In this embodiment: referring to fig. 2, the switching power supply secondary side module includes an optocoupler IC1, a first end of the optocoupler IC1 is connected to a 5V voltage through a resistor R6, a second end of the optocoupler IC1 is connected to a CATH pin of the integrated circuit U1, a fourth end of the optocoupler IC1 is grounded, a third end of the optocoupler is connected to a first end of a chip 3844, and a sixth end of the chip 3844 controls conduction of the MOS transistor Q2.
When the CATH pin of the integrated circuit U1 is at a low level, the optocoupler IC1 is conducted, and then the MOS transistor Q2 is controlled to be conducted through the chip 3844, so that the voltage at the input side of the transformer T1 is discharged. The low-level frequency of the CATH pin of the integrated circuit T1 is changed, the conduction frequency of the MOS tube Q2 is controlled, the input side voltage release frequency of the transformer T1 is further changed, and the output DC of the secondary side module of the switching power supply is changed.
The working principle of the utility model is as follows: the switching power supply primary side module introduces alternating current and outputs the alternating current to the switching power supply secondary side module, the switching power supply secondary side module converts the alternating current into direct current to charge a battery, the MOS control module receives control of the MCU module and controls whether the switching power supply secondary side module and a battery loop are conducted or not, the battery voltage detection module samples the voltage of the battery and outputs the voltage to the MCU module, the battery current detection module samples the current of the battery and outputs the current to the MCU module, the MCU module synthesizes a control circuit, and the LED module receives control of the MCU module and indicates the working state of the circuit.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (6)
1. A multi-cell lithium battery charger, characterized by:
the multi-lithium battery charger includes:
the primary side module of the switching power supply is used for introducing alternating current and outputting the alternating current to the secondary side module of the switching power supply;
the secondary side module of the switching power supply is used for converting alternating current into direct current to charge a battery;
the MOS control module is used for receiving the control of the MCU module and controlling the conduction of the secondary side module of the switching power supply and the battery loop;
the battery voltage detection module is used for sampling the voltage of the battery and outputting the voltage to the MCU module;
the battery current detection module is used for sampling the current of the battery and outputting the current to the MCU module;
the MCU module is used for comprehensively controlling the circuit;
the LED module is used for receiving the control of the MCU module and indicating the working state of the circuit;
the primary side module of the switching power supply is connected with the secondary side module of the switching power supply, the secondary side module of the switching power supply is connected with the MOS control module, the MOS control module is connected with the battery, the battery is connected with the battery voltage detection module and the battery current detection module, the battery voltage detection module is connected with the MCU module, the battery current detection module is connected with the MCU module, and the MCU module is connected with the MOS control module and the LED module.
2. The multiple lithium battery charger of claim 1, wherein the MCU module comprises an integrated circuit U1, a VBUS CTRL pin of the integrated circuit U1 IS connected to the MOS control module, an IS-IN pin and an IS-P pin of the integrated circuit U1 are connected to the battery current detection module, a VBAT pin of the integrated circuit U1 IS connected to the battery voltage detection module, a CATH pin of the integrated circuit U1 IS connected to the switching power module, and the integrated circuit U1 IS 5732.
3. The multi-lithium battery charger according to claim 2, wherein the MOS control module comprises a MOS transistor Q1, an electron R4, wherein a D electrode of the MOS transistor Q1 is connected to one end of a resistor R4 and a secondary side module of the switching power supply, the other end of the electron R4 is connected to a G electrode of the MOS transistor Q1 and a VBUS CTRL pin of the integrated circuit U1, and an S electrode of the MOS transistor Q1 is connected to a positive electrode of the battery BT 1.
4. The lithium battery charger according to claim 2, wherein the battery voltage detection module includes a resistor R5, one end of the resistor R5 is connected to the positive electrode of the battery BT1, and the other end of the resistor R5 is connected to the VBAT pin of the integrated circuit U1.
5. The multiple lithium battery charger of claim 2, wherein the battery current detection module comprises a resistor RK, a first terminal of the resistor RK IS grounded, a first terminal of the resistor RK IS connected to an IS-P pin of the integrated circuit U1, a second terminal of the resistor RK IS connected to an IS-IN pin of the integrated circuit U1, and a negative electrode of the battery BT 1.
6. The lithium battery charger according to claim 2, wherein the secondary side module of the switching power supply comprises an optocoupler IC1, a first end of the optocoupler IC1 is connected to a 5V voltage through a resistor R6, a second end of the optocoupler IC1 is connected to a CATH pin of the integrated circuit U1, a fourth end of the optocoupler IC1 is grounded, a third end of the optocoupler is connected to a first end of the chip 3844, and a sixth end of the chip 3844 controls conduction of the MOS transistor Q2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222768812.3U CN219801962U (en) | 2022-10-20 | 2022-10-20 | Multi-lithium battery charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222768812.3U CN219801962U (en) | 2022-10-20 | 2022-10-20 | Multi-lithium battery charger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219801962U true CN219801962U (en) | 2023-10-03 |
Family
ID=88158286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222768812.3U Active CN219801962U (en) | 2022-10-20 | 2022-10-20 | Multi-lithium battery charger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219801962U (en) |
-
2022
- 2022-10-20 CN CN202222768812.3U patent/CN219801962U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204732924U (en) | A kind of controller for solar and solar recharging system | |
| CN115208305B (en) | Stable photovoltaic power generation intelligent power supply system | |
| CN212462867U (en) | Lithium battery charger | |
| CN219801962U (en) | Multi-lithium battery charger | |
| CN104426220A (en) | Voltage regulation circuit | |
| CN209434923U (en) | Using the new architecture for the universal rechargeable battery that lithium ion battery is constituted | |
| CN104753136A (en) | Equalizing charge device of large-capacity lithium battery | |
| CN103248099B (en) | A kind of intelligent charge control circuit | |
| CN103280850B (en) | Drive circuit with charger baby and multipurpose LED (light-emitting diode) functions | |
| CN212726520U (en) | Equalizing charge protection device | |
| CN113381493A (en) | Llc intelligent charging control method based on dynamic adjustment | |
| CN113394861A (en) | Llc intelligent charger based on dynamic adjustment | |
| CN209860619U (en) | Lithium battery pack with 36V, 18V and Type _ C voltage outputs | |
| CN107800184B (en) | quasi-MPPT charging device for small 12V photovoltaic application system | |
| CN201498805U (en) | Power socket with USB charging function | |
| CN207612083U (en) | A kind of PPS mobile power systems based on PD agreements | |
| CN207218558U (en) | A kind of power-supply system of intelligent electric meter | |
| CN204089313U (en) | Discharge and recharge change-over circuit and battery charging and discharging management circuit | |
| CN108832675A (en) | A kind of lithium battery active equalization equipment | |
| CN209169995U (en) | A kind of novel battery charging circuit | |
| CN219611402U (en) | Constant-current constant-voltage battery charging circuit | |
| CN216146104U (en) | Direct current conversion control circuit and device based on battery charging and discharging management | |
| CN203691037U (en) | Solar energy charging controller based on ATmega128 single-chip microcomputer | |
| CN221328662U (en) | Mobile power supply control circuit and mobile power supply | |
| CN219046430U (en) | Compatible solar energy input digital display energy storage power charger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |