CN210404787U - Lithium ion charger with equalization circuit - Google Patents
Lithium ion charger with equalization circuit Download PDFInfo
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- CN210404787U CN210404787U CN201921583124.1U CN201921583124U CN210404787U CN 210404787 U CN210404787 U CN 210404787U CN 201921583124 U CN201921583124 U CN 201921583124U CN 210404787 U CN210404787 U CN 210404787U
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- casing
- detection module
- lithium ion
- circuit board
- circuit
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Abstract
The utility model discloses a take equalizer circuit's lithium ion charger, which comprises a housing, one side of casing is provided with two interfaces that charge, the opposite side of casing is opened there are two mounting holes, the protection frame is installed to one side of mounting hole, the internally mounted of protection frame has the protection network, the opposite side of casing is provided with the ventilative bars that are the equidistance and distribute, the opposite side of casing is installed into electric switch and power source, the internally mounted of casing has the circuit board, the top welding of circuit board has main control unit and temperature sensor, the top of circuit board is provided with the detection module board. The utility model discloses a knowledge based on equalizer circuit carries out system design, utilizes shunt resistance's reposition of redundant personnel to realize each battery cell charge capacity's equilibrium, and the high energy storage nature of utilization lithium cell that can be better has prolonged the life of group battery effectively, and it possess the quality light, the life cycle is long, no advantage such as memory effect and pollution-free.
Description
Technical Field
The utility model relates to a lithium ion charger technical field especially relates to a take equalizer circuit's lithium ion charger.
Background
The lithium ion battery is a new energy mode developed in the 20 th century. Compared with the prior nickel-metal hydride battery, the nickel-metal hydride battery has the comprehensive advantages of light weight, high energy density, long service cycle, no memory effect, no pollution and the like. In the recent era of the recent electronic products, lithium ion batteries are widely used in electronic products and exist as a main power source.
The lithium ion charger in the prior art is a single lithium battery, the terminal voltage of the single lithium battery is limited, more lithium batteries can be used in a series connection mode, and when the lithium batteries are charged in series, the imbalance of charging charges can directly reduce the service efficiency of the whole series lithium battery pack.
Therefore, it is desirable to design a lithium ion charger with an equalizing circuit to solve the above problems.
Disclosure of Invention
The utility model aims at solving the single section lithium cell that exists among the prior art, the terminal voltage of single section lithium cell is limited, and more meeting of lithium ion battery uses with the tandem system, and when lithium ion battery establishes ties and charges, the non-uniformity of the charge will directly reduce the availability factor shortcoming of whole series lithium cell group, and the lithium ion charger of a take equalizer circuit who provides.
In order to achieve the above purpose, the utility model adopts the following technical scheme: a lithium ion charger with an equalization circuit comprises a casing, wherein two charging interfaces are arranged on one side of the casing, two mounting holes are formed in the other side of the casing, a protective frame is installed on one side of the mounting holes, a protective net is installed inside the protective frame, a breathable grid distributed at equal intervals is arranged on the other side of the casing, a power inlet switch and a power supply interface are installed on the other side of the casing, a circuit board is installed inside the casing, a main controller and a temperature sensor are welded on the top of the circuit board, a detection module board is arranged on the top of the circuit board and comprises a first timer, a second timer, a voltage detection module, an input current detection module and a charging current detection module, the equalization circuit is arranged on the top of the circuit board, and a series lithium battery pack is installed on the top of the circuit board, the output end of the power supply interface is electrically connected with the equalizing circuit through a conducting wire, and the output end of the equalizing circuit is connected with the voltage detection module, the input current detection module, the charging current detection module, the temperature sensor and the input end of the main controller through the conducting wire.
The key concept of the technical scheme is as follows: the balance of the charge capacity of each single battery is realized by shunting the parallel resistors, the high energy storage performance of the lithium battery can be better utilized, and the service life of the battery pack is effectively prolonged.
Furthermore, four supporting legs are installed to the bottom of casing, and four supporting legs are located the bottom four corners position of casing, the bottom of supporting leg is provided with insulating the pad, the both sides of casing all are provided with the handle.
Furthermore, the series lithium battery pack is MAX three series lithium batteries, the balancing process of the series lithium battery pack is the balancing of the charge state of the battery, and a one-to-one mapping relationship exists between the balancing of the charge state of the battery and the voltage of the series lithium battery pack.
Furthermore, the inside mounting of mounting hole has the heat dissipation fan, and the heat dissipation fan is located one side of protection frame.
Furthermore, the rated voltage of a single battery of the series lithium battery pack is 4.2V, and the constant current of the charging power supply is 1.5A.
Further, display screen and output switch are installed to one side of casing, main control unit's output passes through conductor wire and display screen, heat dissipation fan and the interface that charges.
The utility model has the advantages that:
1. through the knowledge based on the equalizing circuit, the system design is carried out, the balance of the charge capacity of each single battery is realized by utilizing the shunt of the parallel resistor, the high energy storage performance of the lithium battery can be better utilized, and the service life of the battery pack is effectively prolonged.
2. And the balance of the SOC of the corresponding battery is realized by adopting a shunt balance mode of the parallel resistors. The controller generates corresponding PWM pulse duty ratio through an algorithm to drive the on and off of the MOSFET transistor connected with the battery in parallel, and further the capacity of the lithium ion battery tends to be balanced.
3. Compared with the traditional nickel-metal hydride battery, the lithium ion charger with the equalizing circuit has the comprehensive advantages of light weight, high energy density, high open circuit voltage, long service cycle, no memory effect, no pollution and the like.
4. Through the heat dissipation fan that sets up, when the charger internal temperature is higher, inspect through temperature sensor, start the heat dissipation fan through main control unit and dispel the heat to equipment inside, improve the electronic component's on the circuit board operational environment in the charger to increase the life of charger.
Drawings
Fig. 1 is a schematic diagram of an overall structure of a lithium ion charger with an equalizing circuit according to the present invention;
fig. 2 is a schematic structural view of a heat dissipation fan of a lithium ion charger with an equalizing circuit according to the present invention;
fig. 3 is a schematic structural diagram of a circuit board of a lithium ion charger with an equalizing circuit according to the present invention;
fig. 4 is a system block diagram of a lithium ion charger with an equalizing circuit according to the present invention;
fig. 5 is an equalizing circuit diagram of a lithium ion charger with an equalizing circuit according to the present invention;
fig. 6 is a control flow chart of a lithium ion charger with an equalizing circuit according to the present invention.
In the figure: the device comprises a machine shell 1, a display screen 2, a power transmission switch 3, a charging interface 4, supporting legs 5, an insulating pad 6, a handle 7, a mounting hole 8, a protective frame 9, a heat dissipation fan 10, a protective screen 11, a ventilating grid 12, a power inlet switch 13, a power interface 14, a circuit board 15, a main controller 16, a detection module board 17, a timer I18, a timer II 19, a voltage detection module 20, an input current detection module 21, a charging current detection module 22, a temperature sensor 23, an equalizing circuit 24 and a series lithium battery pack 25.
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.
Referring to fig. 1 to 6, a lithium ion charger with an equalizing circuit includes a housing 1, two charging interfaces 4 are disposed on one side of the housing 1, the charging interfaces 4 are used as interfaces for charging the lithium ion charger, two mounting holes 8 are disposed on the other side of the housing 1, a protection frame 9 is mounted on one side of the mounting holes 8, the protection frame 9 can prevent fingers of a user from touching a heat dissipating fan 10 by mistake, a protection net 11 is mounted inside the protection frame 9, air permeable grids 12 are disposed on the other side of the housing 1 and are distributed equidistantly and used for dissipating heat inside the housing 1, an incoming switch 13 and a power supply interface 14 are mounted on the other side of the housing 1, a circuit board 15 is mounted inside the housing 1, a main controller 16 and a temperature sensor 23 are welded on the top of the circuit board 15, the main controller is P1C16F887, the temperature sensor 23 is PT100, and the temperature sensor 23 is used for detecting the temperature inside the housing 1, the top of the circuit board 15 is provided with a detection module board 17, the detection module board 17 comprises a first timer 18, a second timer 19, a voltage detection module 20, an input current detection module 21 and a charging current detection module 22, the top of the circuit board 15 is provided with an equalization circuit 24, system design is carried out based on knowledge of the equalization circuit 24, the balance of charge capacity of each single battery is realized by shunting of parallel resistors, high energy storage performance of lithium batteries can be better utilized, the service life of the series lithium battery pack 25 is effectively prolonged, the series lithium battery pack 25 is installed at the top of the circuit board 15, the output end of the power interface 14 is electrically connected with the equalization circuit 24 through a conductive wire, the output end of the equalizing circuit 24 is connected with the input ends of the voltage detecting module 20, the input current detecting module 21, the charging current detecting module 22, the temperature sensor 23 and the main controller 16 through conductive wires.
As can be seen from the above description, the present invention has the following advantages: through system design based on knowledge of the equalizing circuit 24, the balance of the charge capacity of each single battery is realized by shunting of the parallel resistors, the high energy storage performance of the lithium battery can be better utilized, and the service life of the series lithium battery pack 25 is effectively prolonged.
Further, four supporting legs 5 are installed to casing 1's bottom, and supporting leg 5 is used for casing 1 and ground to part, and four supporting legs 5 are located casing 1's bottom four corners position, and supporting leg 5's bottom is provided with insulating pad 6, and casing 1's both sides all are provided with handle 7, and the people's of being convenient for of handle 7 transport.
Further, the series lithium battery pack 25 is a MAX1757 three-section series lithium battery, the balancing process of the series lithium battery pack 25 is the balancing of the battery charge state, and a one-to-one mapping relationship exists between the balancing of the battery charge state and the voltage of the series lithium battery pack 25.
Further, a heat dissipation fan 10 is installed inside the installation hole 8, the heat dissipation fan 18 dissipates heat inside the device, the working environment of electronic components on the circuit board 15 in the charger is improved, and the heat dissipation fan 10 is located on one side of the protection frame 9.
Furthermore, the rated voltage of a single battery of the series lithium battery pack 25 is 4.2V, the constant current of the charging power supply is 1.5A, automatic conversion can be realized in each stage, and the precision of the constant voltage charging voltage is 0.8%.
Further, display screen 2 and output switch 3 are installed to one side of casing 1, and display screen 2 can show the voltage and the electric current of output and input, and main control unit 16's output passes through the conductor wire and display screen 2, heat dissipation fan 10 and the interface 4 that charges.
By adopting the heat dissipation fan 10 arranged as described above, when the temperature inside the charger is high, the temperature sensor 23 is used for checking, the heat dissipation fan 18 is started through the main controller 16 to dissipate heat inside the device, the working environment of electronic components on the circuit board 15 in the charger is improved, and therefore the service life of the charger is prolonged.
In the following, some preferred embodiments or application examples are listed to help those skilled in the art to better understand the technical content of the present invention and the technical contribution of the present invention to the prior art:
example 1
A lithium ion charger with an equalizing circuit comprises a casing 1, wherein two charging interfaces 4 are arranged on one side of the casing 1, the charging interfaces 4 are used for interfaces for charging the lithium ion charger outwards, two mounting holes 8 are formed in the other side of the casing 1, a protection frame 9 is installed on one side of each mounting hole 8, the protection frame 9 can prevent fingers of a user from touching a heat dissipation fan 10 by mistake, a protection net 11 is installed inside the protection frame 9, air-permeable grids 12 which are distributed equidistantly are arranged on the other side of the casing 1 and used for dissipating heat inside the casing 1, an electricity inlet switch 13 and a power supply interface 14 are installed on the other side of the casing 1, a circuit board 15 is installed inside the casing 1, a controller 16 and a temperature sensor 23 are welded on the top of the circuit board 15, the model of the main controller is P1C16F887, the model of the temperature sensor 23 is PT100, and the temperature sensor 23, the top of the circuit board 15 is provided with a detection module board 17, the detection module board 17 comprises a first timer 18, a second timer 19, a voltage detection module 20, an input current detection module 21 and a charging current detection module 22, the top of the circuit board 15 is provided with an equalization circuit 24, system design is carried out based on knowledge of the equalization circuit 24, the balance of charge capacity of each single battery is realized by shunting of parallel resistors, high energy storage performance of lithium batteries can be better utilized, the service life of the series lithium battery pack 25 is effectively prolonged, the series lithium battery pack 25 is installed at the top of the circuit board 15, the output end of the power interface 14 is electrically connected with the equalization circuit 24 through a conductive wire, the output end of the equalizing circuit 24 is connected with the input ends of the voltage detecting module 20, the input current detecting module 21, the charging current detecting module 22, the temperature sensor 23 and the main controller 16 through conductive wires.
The bottom of the machine shell 1 is provided with four supporting legs 5, the supporting legs 5 are used for separating the machine shell 1 from the ground, the four supporting legs 5 are positioned at four corners of the bottom of the machine shell 1, the bottoms of the supporting legs 5 are provided with insulating pads 6, the two sides of the machine shell 1 are provided with handles 7, and the handles 7 are convenient for people to carry; the series lithium battery pack 25 is an MAX1757 three-section series lithium battery, the balancing process of the series lithium battery pack 25 is the balancing of the battery charge state, and a one-to-one mapping relation exists between the balancing of the battery charge state and the voltage of the series lithium battery pack 25; a heat dissipation fan 10 is arranged in the mounting hole 8, the heat dissipation fan 18 is used for dissipating heat in the equipment, the working environment of electronic elements on a circuit board 15 in the charger is improved, and the heat dissipation fan 10 is positioned on one side of the protection frame 9; the rated voltage of a single battery of the series lithium battery pack 25 is 4.2V, the constant current of the charging power supply is 1.5A, automatic conversion can be realized in each stage, and the precision of constant-voltage charging voltage is 0.8%; display screen 2 and output switch 3 are installed to one side of casing 1, and display screen 2 can show the voltage and the electric current of output and input, and main control unit 16's output passes through the conductor wire and display screen 2, heat dissipation fan 10 and the interface 4 that charges.
Specifically, the utility model discloses a theory of operation as follows: when the charger is used, the charger consists of a main controller 16, a first timer 18, a voltage detection module 20, a temperature sensor 23, an input current detection module 21, a charging current detection module 22, a series lithium battery pack 25 and an equalizing circuit 24. An internal input current regulating circuit for limiting the total input current of the power supply, including the system load current ILOADAnd a charging current ICHGWhen detecting that the input current is larger than the set current limiting threshold, reducing the charging current ICHGThe purpose of limiting the input current can be achieved. In the charging process, the voltage detection circuit and the current detection circuit are dividedThe method comprises the steps of continuously monitoring the voltage and the charging current of a lithium ion battery, charging in a pre-charging mode during normal charging, entering a constant-current mode for quick charging after the voltage rises to a threshold voltage, entering a full-charging stage for charging in a constant-voltage mode when the average single lithium battery voltage is close to 4.2V, and finally ending the charging stage, providing a parallel resistance branch for each single battery, closing a switch of the parallel branch when a certain single battery is overcharged, balancing a battery pack in an energy consumption mode through a resistor connected in parallel with the parallel branch, using PICl6F887 as a main control chip, realizing real-time monitoring of the voltage of the three batteries through programming, and controlling the switch and the conduction of an MOSFET transistor by adopting a PWM driving signal. In the charging process, if the voltage of the lithium battery Bi is higher than the average voltage of the battery pack and the difference value exceeds the balance offset, the corresponding MOSFET transistor is switched on, energy is dissipated through the parallel resistor, and the balance purpose is achieved.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides a take equalizer circuit's lithium ion charger, includes casing (1), its characterized in that, one side of casing (1) is provided with two interfaces (4) that charge, the opposite side of casing (1) is opened there are two mounting holes (8), protection frame (9) are installed to one side of mounting hole (8), the internally mounted of protection frame (9) has protection network (11), the opposite side of casing (1) is provided with ventilative bars (12) that are the equidistance and distribute, the opposite side of casing (1) is installed and is advanced electric switch (13) and power source (14), the internally mounted of casing (1) has circuit board (15), the top welding of circuit board (15) has main control unit (16) and temperature sensor (23), the top of circuit board (15) is provided with detection module board (17), and detects module board (17) including timer (18), Timer two (19), voltage detection module (20), input current detection module (21) and charging current detection module (22), the top of circuit board (15) is provided with equalizer circuit (24), series lithium cell group (25) are installed at the top of circuit board (15), the output of power source (14) passes through the conductor wire and forms electric connection with equalizer circuit (24), the output of equalizer circuit (24) passes through the conductor wire and is connected with the input of voltage detection module (20), input current detection module (21), charging current detection module (22), temperature sensor (23) and main control unit (16).
2. The lithium ion charger with the equalizing circuit according to claim 1, wherein four support legs (5) are mounted at the bottom of the housing (1), the four support legs (5) are located at four corners of the bottom of the housing (1), an insulating pad (6) is disposed at the bottom of each support leg (5), and handles (7) are disposed on two sides of the housing (1).
3. The lithium ion charger with the equalizing circuit according to claim 1, wherein the series lithium battery pack (25) is a MAX1757 three-section series lithium battery, the equalizing process of the series lithium battery pack (25) is the equalizing of the battery state of charge, and there is a one-to-one mapping relationship between the equalizing of the battery state of charge and the voltage of the series lithium battery pack (25).
4. The lithium ion charger with the equalizing circuit according to claim 1, wherein a heat dissipating fan (10) is installed inside the mounting hole (8), and the heat dissipating fan (10) is located on one side of the protection frame (9).
5. The lithium ion charger with the equalizing circuit of claim 1, wherein the rated voltage of a single cell of the series lithium battery pack (25) is 4.2V, and the constant current of a charging power supply is 1.5A.
6. The lithium ion charger with the equalizing circuit according to claim 1, wherein a display screen (2) and an output switch (3) are installed on one side of the housing (1), and an output end of the main controller (16) is connected with the display screen (2), the heat dissipating fan (10) and the charging interface (4) through conducting wires.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921583124.1U CN210404787U (en) | 2019-09-23 | 2019-09-23 | Lithium ion charger with equalization circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921583124.1U CN210404787U (en) | 2019-09-23 | 2019-09-23 | Lithium ion charger with equalization circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210404787U true CN210404787U (en) | 2020-04-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921583124.1U Expired - Fee Related CN210404787U (en) | 2019-09-23 | 2019-09-23 | Lithium ion charger with equalization circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210404787U (en) |
-
2019
- 2019-09-23 CN CN201921583124.1U patent/CN210404787U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200424 Termination date: 20200923 |
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| CF01 | Termination of patent right due to non-payment of annual fee |