CN218514105U - Battery management application circuit applied to portable equipment in medical field - Google Patents
Battery management application circuit applied to portable equipment in medical field Download PDFInfo
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- CN218514105U CN218514105U CN202221895536.0U CN202221895536U CN218514105U CN 218514105 U CN218514105 U CN 218514105U CN 202221895536 U CN202221895536 U CN 202221895536U CN 218514105 U CN218514105 U CN 218514105U
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Abstract
The utility model relates to a medical equipment battery technical field specifically discloses a be applied to battery management application circuit of medical field portable equipment. The battery management application circuit comprises an adapter, a battery, a charging module, an electricity meter circuit, a voltage reduction module and a single chip microcomputer system; the batteries are one, two or three strings of batteries; the adapter and the battery are electrically connected with the charging module; the charging module is electrically connected with the electricity meter circuit and the single chip microcomputer system; the voltage reduction module is electrically connected with the charging module, the electricity meter circuit and the single chip microcomputer system and can reduce the voltage to a required voltage level; the single chip microcomputer system is used for collecting electric quantity information, the charging module collects state information of the battery in the charging process, and finally the collected information is indicated or displayed through the serial port terminal. The battery management application circuit can support 1 string, 2 strings and 3 strings of compatible batteries to supply power to a system, and is high in applicability and low in cost.
Description
Technical Field
The utility model relates to a medical equipment battery technical field especially relates to a be applied to battery management application circuit of medical field portable equipment.
Background
Most portable equipment in the medical field at present depends on battery power supply, and the use time requirements of equipment with different functions and different users on the equipment are different; they may have different requirements for the number of battery cells, the voltage of the battery, and the maximum charge and discharge current.
However, the battery for portable devices in the medical field has the following problems:
1. the limit on the number of battery sections is always fixed; once the power supply voltage requirement of the system is changed, a battery charging and discharging management circuit needs to be redesigned, and a PCB (printed circuit board) needs to be redrawn, so that a large amount of time cost, labor cost and research and development cost are consumed;
2. the circuit has no function of estimating the electric quantity of the battery;
3. the charging overcurrent protection of the battery charging and discharging management circuit can only be fixed parameters, and if the overcurrent protection can only be set to be 2A.
Therefore, it is necessary to design a battery management application circuit applied to portable devices in the medical field to solve the above problems.
Disclosure of Invention
An object of the utility model is to provide a be applied to battery management application circuit of medical field portable equipment can support 1 cluster of compatibility, 2 clusters, 3 clusters of batteries to the power supply of system, and the suitability is strong, and is with low costs.
To achieve the purpose, the utility model adopts the following technical proposal:
a battery management application circuit applied to portable equipment in the medical field comprises an adapter, a battery, a charging module, an electricity meter circuit, a voltage reduction module and a single chip microcomputer system;
the batteries are one, two or three strings of batteries;
the adapter and the battery are electrically connected with the charging module;
the charging module is electrically connected with the electricity meter circuit and the single chip microcomputer system, can charge the battery and supply power to the single chip microcomputer system and the electricity meter circuit;
the voltage reduction module is electrically connected with the charging module, the electricity meter circuit and the single chip microcomputer system and can reduce the voltage provided by the adapter and the battery to the voltage level required by the single chip microcomputer system;
the single chip microcomputer system is used for collecting electric quantity information, the charging module collects state information of the battery in the charging process, and the collected information is indicated or displayed through a serial port terminal.
Preferably, the maximum voltage of a single battery is 4.2V.
Preferably, the coulometer circuit adopts a chip CW2015CHBD, and comprises a first-order filter circuit composed of a resistor R18 and a capacitor C9 and used for supplying power to the chip CW2015 CHBD; the fuel gauge circuit further comprises a voltage division circuit consisting of a resistor R13, a resistor R14 and a capacitor C7 and used for being connected to a CELL pin U2-pin2 of the chip CW2015 CHBD.
Preferably, the charging module adopts a chip BQ24170RGYR; under the state that the adapter is inserted, the output of the pins U3-pin19 of the chip BQ24170RGYR is in a low level, the MOS tubes Q3-DS are disconnected, and the adapter respectively charges the battery and supplies power to all load systems including the single chip microcomputer system; under the state that the adapter is not plugged, the output of the pins U3-pin19 of the chip BQ24170RGYR is at a high level, MOS tubes Q3-DS are conducted, and the battery supplies power to all load systems including the single chip microcomputer system.
Preferably, the output voltage of the adapter is 9V.
Preferably, the voltage grade of the single chip microcomputer system is 3.3V grade.
The utility model has the advantages that:
1. the power supply of 1 string of batteries, 2 strings of batteries and 3 strings of batteries to the system can be supported and compatible according to requirements, the batteries with different strings can be compatible only by changing corresponding resistance-capacitance configuration, and the system is high in applicability and low in cost.
2. The charging overcurrent protection can be configured in a certain way according to the charging multiplying power of different types of rechargeable batteries so as to maximally improve the service life of the batteries.
3. The battery can be charged and discharged without firmware initialization, and various over-temperature, over-current and over-voltage protections can be realized.
4. The function of estimating the electric quantity of 1 string of batteries, 2 strings of batteries and 3 strings of batteries is added only with ultra-low cost.
Drawings
Fig. 1 is a schematic structural diagram of a battery management application circuit applied to a portable device in the medical field.
FIG. 2 is a schematic diagram of a circuit supporting two strings of batteries;
FIG. 3 is a schematic diagram of the current flow path of the battery management application circuit of FIG. 2;
FIG. 4 is a schematic diagram of a circuit when supporting three strings of batteries;
fig. 5 is a schematic diagram of the circuit when supporting a string of batteries.
Detailed Description
The technical solution of the present invention is further explained by the following embodiments with reference to the drawings.
As shown in fig. 1 to 5, a battery management application circuit applied to a portable device in the medical field includes an adapter 1, a battery 2, a charging module 3, an electricity meter circuit 4, a voltage reduction module 6, and a single chip microcomputer system 5.
Specifically, in the battery management application circuit, the battery 2 is a series, two series or three series of rechargeable batteries and is electrically connected with the charging module 3; the maximum voltage of the single battery 2 is 4.2V. The adapter 1 is a charger, and is electrically connected to the charging module 3, and is configured to convert 220V ac voltage into dc low voltage required by the charging module. The charging module 3 is electrically connected with the fuel gauge circuit 4 and the singlechip system 5, and can charge the battery 2 and supply power to the singlechip system 5 and the fuel gauge circuit 4; the voltage reduction module 6 is electrically connected with the charging module 3, the fuel gauge circuit 4 and the single chip microcomputer system 5, and can reduce the voltage provided by the adapter 1 and the battery 2 to the voltage level required by the single chip microcomputer system 5; the single chip microcomputer system 5 is used for collecting electric quantity information, collecting state information of the charging module 3 in the charging process of the battery 2, and finally indicating or displaying the collected information through the serial port terminal. The voltage grade of the singlechip system 5 is 3.3V grade. It should be noted that the adapter 1 and the battery 2 supply power to all load systems including the single chip microcomputer system 5, and therefore, the voltage level of the voltage provided by the adapter 1 and the battery 2 and reduced by the voltage reduction module 6 is not limited to the 3.3V level.
Example 1
Fig. 2 and 3 are circuit schematic diagrams of a battery management application circuit supporting two strings of batteries.
In this embodiment, the output voltage of the adapter 1 is 9V. The battery 2 is two batteries connected in series, and the maximum voltage is about 8.4V. The voltage reduction module 6 is mainly used for converting the voltage of the battery 2 or the voltage of the adapter 1 into 3.3V and supplying power to the singlechip microcomputer system 5 and the electricity meter circuit 4. The single chip microcomputer system 5 is mainly used for collecting information of electric quantity and state information when the charging module 3 charges the battery 2, and finally the state information can be indicated through a serial port terminal or a display screen indicates specific battery information. The coulometer circuit 4 is designed by a chip CW2015CHBD plus part of resistance-capacitance, and comprises a first-order filter circuit consisting of a resistor R18 and a capacitor C9, and is used for supplying power to the chip CW2015 CHBD; the fuel gauge circuit 4 further includes a voltage divider circuit composed of a resistor R13, a resistor R14, and a capacitor C7, for connection to the CELL pin U2-pin2 of the chip CW2015 CHBD. Wherein, the distribution of the resistance values of R14 and R13 needs to be adjusted according to the number of the battery sections; the present embodiment is a battery management application circuit, which supports two strings of batteries, and therefore R14= R13 needs to be set; the SCL pin and the SDA pin may then be directly connected to the SCL pin and the SDA pin of the MCU. The resistors R26, R27, and R28 are pull-up resistors.
The charging module 3 adopts a chip BQ24170RGYR, and in the state that the chip BQ24170RGYR is spliced with an adaptive pin1, the output of pins U3-pin19 of the chip BQ24170RGYR is low level, and MOS tubes Q3-DS are disconnected; at the moment, the voltage of the adapter is equal to + VSYS, the adapter 1 charges the battery 2 and supplies power to all load systems including the single chip microcomputer system 5; the current flowing path of the adapter 1 for charging the battery 2 is a route 1-3 in fig. 3, and the current flowing path of the adapter 1 for supplying power to all load systems including the single chip microcomputer system 5 is a route 1-2 in fig. 3. Under the state that the adapter 1 is not plugged, the output of the pins U3-pin19 of the chip BQ24170RGYR is high level, and the MOS tubes Q3-DS are conducted; at this time, the battery voltage is equal to + VSYS, the battery 2 supplies power to all load systems including the single chip microcomputer system 5, and the current flowing path is a 4-5 line in fig. 3.
In this embodiment, the specific setting is that the pins U3 to U14 pin are suspended, and the resistors R29 and R30 are marked as NC in fig. 3, that is, no connection (No Connect) is used. If 1 battery or 3 batteries need to be compatible, two resistors need to be placed on the pins U3-14 pin; on the actual PCB circuit board, when the number of the battery strings is required to be adjusted to be 1 string, the resistor R30 can be welded by 0R; when the number of the battery strings is required to be adjusted to be 3, only the resistor R29 is welded by 0R, namely, the Cell pin is connected to a Vref power supply (the Vref power supply is an output power supply with U3 output voltage of 3.3V); if the system load of the user is relatively small, the power supply (3.3V-35 mA) can be directly used.
The setting of the charging current in the circuit of fig. 3 is Icharge = Viset/(20 × rac2) = 0.4/(20 × 0.01) =2A; wherein visset = Vref R24/(R20 + R24) =3.3 × 32.4/(32.4 + 232) =0.4V, where Vref is the power supply with U3 fixed output voltage of 3.3V; rac2 uses a resistance of 0.01R; if the maximum charging current needs to be adjusted, the resistance values of the resistor R20 and the resistor R24 can be adjusted, and the value of Viset can be adjusted; finally, the value of Ichar is adjusted. Iprecorge = Viset/(200 × rac2) = 0.4/(200 × 0.01) =0.2A; the precharge current was 0.2A. The battery short-circuit protection is that when the voltage of the SRN pin is lower than 2V, the SRN pin is considered to be in a battery short-circuit state during charging, and at the moment, U3 is closed to charge; u3-4pin, AVCC pin, is the power supply pin of U3 chip, and in FIG. 3, U3 can be supplied by electricity, 2 or adapter 1. And a power supply circuit of the U3 chip is formed by the diode D6, the resistor R7, the resistor R8 and the capacitor C4. Power is supplied by the adapter 1 in the presence of adapter power and by the battery 2 when the adapter 1 is not present.
The input current in the circuit of fig. 3 is set to Iin = Vacset/(20 × rac1) = 0.6/(20 × 0.01) =3A; wherein Vacset = Vref R25/(R21 + R25) =3.3 × 22.1/(22.1 + 100) =0.6v, rac2 uses a resistance of 0.01R; if the maximum input current needs to be adjusted, the resistance values of the resistor R21 and the resistor R25 can be adjusted, and then the value of Vacset, and finally the value of Iin can be adjusted.
When 2 strings of batteries are set, the default of the system exceeds the threshold value of overvoltage voltage which is 102 percent of the total voltage of the set batteries, and the input overvoltage protection and the input undervoltage protection are converted at the moment; inputting overvoltage protection once the voltage on the OVPSET (U3-18 pin) is higher than a 1.6V threshold value; inputting undervoltage protection once the voltage on the OVPSET (U3-18 pin) is lower than a 0.5V threshold; once protection occurs, the charging function is disabled and both input MOSFETs Q1 and Q2 are turned off.
U3-10pin is the temperature setting pin, and the external resistor sets up the temperature protection range between 5-40 ℃, and 103AT is the temperature sensitive resistor, can externally paste on battery 2 to the temperature of real-time supervision battery package. U3-9pin is the charging state instruction pin, and the internal pin is open-drain output state. The status output pin (STAT) is defined as shown in Table 1 below.
TABLE 1 definition of State output Pin (STAT)
Example 2
Fig. 4 is a circuit schematic of a battery management application circuit supporting three strings of batteries. When the battery management application circuit supporting two strings of batteries in embodiment 1 is modified to the battery management application circuit supporting three strings of batteries, it is only necessary to simply modify the resistance values of the resistor R29, the resistor R13, and the resistor R11.
Example 3
Fig. 5 is a circuit schematic of a battery management application circuit supporting three strings of batteries. When the battery management application circuit supporting two batteries in embodiment 1 is modified to the battery management application circuit supporting one battery, it is only necessary to simply modify the resistance values of the resistor R30, the resistor R13, the resistor R14, and the resistor R11.
The utility model discloses a be applied to battery management application circuit of medical field portable equipment can support compatible 1 cluster, 2 clusters, 3 clusters of batteries to the power supply of system according to the demand, only needs to change corresponding resistance-capacitance configuration, can compatible different cluster batteries of number, and the suitability is strong, and is with low costs. The charging overcurrent protection can be used for setting and configuring the charging multiplying power of different types of rechargeable batteries to the maximum extent so as to prolong the service life of the batteries; the battery charging and discharging and various over-temperature, over-current and over-voltage protections can be completed without firmware initialization; the function of estimating the electric quantity of 1 string of batteries, 2 strings of batteries and 3 strings of batteries is added only with ultra-low cost.
The technical principle of the present invention has been described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.
Claims (6)
1. A battery management application circuit applied to portable equipment in the medical field is characterized by comprising an adapter, a battery, a charging module, an electricity meter circuit, a voltage reduction module and a single chip microcomputer system;
the batteries are one, two or three strings of batteries;
the adapter and the battery are electrically connected with the charging module;
the charging module is electrically connected with the fuel gauge circuit and the single chip microcomputer system, can charge the battery and supply power to the single chip microcomputer system and the fuel gauge circuit;
the voltage reduction module is electrically connected with the charging module, the electricity meter circuit and the single chip microcomputer system and can reduce the voltage provided by the adapter and the battery to the voltage level required by the single chip microcomputer system;
the single chip microcomputer system is used for collecting electric quantity information, the charging module collects state information of the battery in the charging process, and the collected information is indicated or displayed through a serial port terminal.
2. The battery management application circuit applied to the portable equipment in the medical field as claimed in claim 1, wherein the maximum voltage of a single battery is 4.2V.
3. The battery management application circuit applied to the portable equipment in the medical field according to claim 1, wherein the electricity meter circuit adopts a chip CW2015CHBD, and comprises a first-order filter circuit composed of a resistor R18 and a capacitor C9 for supplying power to the chip CW2015 CHBD; the fuel gauge circuit further comprises a voltage division circuit consisting of a resistor R13, a resistor R14 and a capacitor C7 and used for being connected to a CELL pin U2-pin2 of the chip CW2015 CHBD.
4. The battery management application circuit applied to the portable device in the medical field as claimed in claim 1, wherein the charging module employs a chip BQ24170RGYR; under the state that the adapter is plugged, the output of the pins U3-pin19 of the chip BQ24170RGYR is low level, and the MOS tubes Q3-DS are disconnected; the adapter respectively charges the battery and supplies power to all load systems including the single chip microcomputer system; under the state that the adapter is not plugged, the output of the pins U3-pin19 of the chip BQ24170RGYR is at a high level, MOS tubes Q3-DS are conducted, and the battery supplies power to all load systems including the single chip microcomputer system.
5. The battery management application circuit applied to the portable equipment in the medical field as claimed in claim 1, wherein the output voltage of the adapter is 9V.
6. The battery management application circuit applied to the portable equipment in the medical field as claimed in claim 1, wherein the voltage level of the single chip microcomputer system is 3.3V level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221895536.0U CN218514105U (en) | 2022-07-22 | 2022-07-22 | Battery management application circuit applied to portable equipment in medical field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221895536.0U CN218514105U (en) | 2022-07-22 | 2022-07-22 | Battery management application circuit applied to portable equipment in medical field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218514105U true CN218514105U (en) | 2023-02-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221895536.0U Active CN218514105U (en) | 2022-07-22 | 2022-07-22 | Battery management application circuit applied to portable equipment in medical field |
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| Country | Link |
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| CN (1) | CN218514105U (en) |
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- 2022-07-22 CN CN202221895536.0U patent/CN218514105U/en active Active
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