CN113328496A - Portable universal life support system double-battery switching structure adapting to field environment - Google Patents

Portable universal life support system double-battery switching structure adapting to field environment Download PDF

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Publication number
CN113328496A
CN113328496A CN202110682173.6A CN202110682173A CN113328496A CN 113328496 A CN113328496 A CN 113328496A CN 202110682173 A CN202110682173 A CN 202110682173A CN 113328496 A CN113328496 A CN 113328496A
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China
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battery
module
power
charging
power supply
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CN202110682173.6A
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CN113328496B (en
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李会凤
史长虹
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PLA General Hospital
SANHE KEDA INDUSTRIAL Co.,Ltd.
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Sanhe Keda Industrial Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00304—Overcurrent protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00306—Overdischarge protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00308—Overvoltage protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00309—Overheat or overtemperature protection
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/007—Regulation of charging or discharging current or voltage
    • H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering

Abstract

The invention discloses a portable universal life support system double-battery switching structure suitable for a field environment, which comprises a voltage boosting and reducing module electrically connected with an external adapter, and an A charging module and a B charging module which are used for charging a fixed battery A and a detachable battery B respectively, wherein the output ends of the fixed battery A and the detachable battery B are connected with a switching circuit, the output ends of the switching circuit and the voltage boosting and reducing module are connected with a main power supply branch and the input end of a singlechip power supply branch, the output end of the main power supply branch is connected with a mainboard of the portable universal life support system to supply power for the portable universal life support system, and the output end of the singlechip power supply branch is connected with a power management module which is used for controlling the coordinated operation of the A charging module, the B charging module, the switching circuit and the main power supply branch. The invention can realize the dynamic distribution of the system power, maximally provide the power for the system power supply, and does not need to reserve the charging power, thereby effectively ensuring the continuous work of the portable universal life support system in the field environment.

Description

Portable universal life support system double-battery switching structure adapting to field environment
Technical Field
The invention relates to the technical field of medical instruments, in particular to a power supply device for a portable universal life support system adaptive to a field environment.
Background
In vitro life support systems are able to keep organs alive until they recover when treating critically ill patients and provide time for further diagnosis and treatment or transport to specialized medical centers for treatment. From the actual rescue situation, when a wounded person appears, the rescue time is very precious, and timely rescue is sometimes needed to be carried out on site, so that the portable universal life support system is very necessary. However, the field environment is difficult to get electricity, and the injured types of the wounded are various, so that the portable universal life support system needs to have certain cruising ability.
With the continuous development of medical instruments, most of the medical instruments adopt built-in non-detachable single batteries or detachable single batteries. However, in the case of continuous operation in the field, if the battery is low or needs to be replaced, the machine may not work normally temporarily, which may lead to the failure of the life safety of the patient and serious hidden troubles.
Therefore, the portable universal life support system developed by the applicant adopts a dual-power supply device combining a fixed battery and a detachable battery, and a change-over switch is adopted between the two batteries to realize the change-over. However, such a switching method has the following disadvantages: 1) the double batteries are connected in parallel, so that the problem of inconsistent output voltage exists, and partial functions of the portable universal life support system need to be degraded; 2) the prior use of the detachable battery cannot be realized, so that the service life of the fixed battery is reduced; 3) when the portable life support system is not in use, the battery cannot be automatically turned off, the power consumption is high, and the problem of over-discharge of the battery is easy to occur after long-term storage.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a portable universal life support system double-battery switching structure suitable for the field environment, which can realize the dynamic distribution of system power, supply power to the system to the maximum extent, and does not need to reserve charging power, thereby effectively ensuring the continuous work of the portable universal life support system in the field environment.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows.
The double-battery switching structure of the portable universal life support system suitable for the field environment comprises a voltage boosting and reducing module electrically connected with an external adapter, an A charging module and a B charging module, wherein the A charging module and the B charging module are respectively charged by a fixed battery A and a detachable battery B, the output ends of the fixed battery A and the detachable battery B are connected with a switching circuit, the output ends of the switching circuit and the voltage boosting and reducing module are respectively connected with the input ends of a main power supply branch and a single-chip microcomputer power supply branch, the output end of the main power supply branch is connected with a main board of the portable universal life support system to supply power for the main board, and the output end of the single-chip microcomputer power supply branch is connected with a power management module which is used for controlling the coordination operation of the A charging module, the B charging module, the switching circuit and the main power supply branch.
According to the portable universal life support system double-battery switching structure adapting to the field environment, an ideal diode is respectively connected in series between the output ends of the switching circuit and the buck-boost module and the input end of the main power supply branch circuit.
According to the portable universal life support system double-battery switching structure adapting to the field environment, the output ends of the switching circuit and the buck-boost module and the input end of the power supply branch of the single chip microcomputer are respectively connected in series with a Schottky diode.
In the portable universal life support system double-battery switching structure adapting to the field environment, an A cut-off circuit is connected in series between the fixed battery A and the switching circuit as well as between the fixed battery A and the charging module A, and a B cut-off circuit is connected in series between the fixed battery B and the switching circuit as well as between the fixed battery B and the charging module B; the controlled ends of the A cut-off circuit and the B cut-off circuit are respectively connected with the output end of the power management module.
According to the portable universal life support system double-battery switching structure adapting to the field environment, the power supply branch of the single chip microcomputer mainly comprises a 3.3V conversion circuit.
Above-mentioned portable general life support system bi-cell switching structure of adaptation field environment, the output voltage of buck-boost module is greater than detachable battery B's output voltage among the bi-cell switching structure, and detachable battery B's output voltage is greater than fixed battery A's output voltage.
Above-mentioned portable general life support system bi-cell switching structure of adaptation field environment, bi-cell switching structure is when the mainboard power supply, preferentially uses detachable battery B power supply, and when the live power of complete machine is greater than B charging module's output power, the step-up and step-down module gets into the current-limiting mode, and the voltage drops to the A charging module output voltage that is not more than fixed battery A, switches to fixed battery A's A charging module and supplies power for the complete machine.
According to the portable universal life support system double-battery switching structure adapting to the field environment, the power limit value of the double-battery switching structure is the maximum output power of the adapter, when the use peak power of the whole machine reaches the limit value, the power management module controls the voltage boosting and reducing module to reduce the charging power of the charging module A and the charging module B, the voltage boosting and reducing module directly supplies power to the whole machine, and after the use power of the whole machine is reduced, the charging power of the charging module A and the charging power of the charging module B are improved.
According to the portable universal life support system double-battery switching structure adapting to the field environment, the power management module of the double-battery switching structure monitors whether the voltage is normally output by the voltage increasing and decreasing module, and if the voltage is normally output, the power management module directly supplies power to the main power supply branch and the singlechip power supply branch; if the voltage boosting and reducing module has no output, the power supply management module supplies power to the main power supply branch and the singlechip supply branch by using the fixed battery A and the detachable battery B as a voltage regulating signal BOOST _ ADJ at the output end of the switching circuit.
The portable universal life support system double-battery switching structure adapting to the field environment has the advantages that the power management module in the double-battery switching structure controls the charging module A and the charging module B to charge the batteries in a manner that an ISET1_ PWM signal is output for trickle charging, an ISET1_ PWM signal is output for constant-current charging, a VCHARGE _ PWM signal is output for floating-voltage charging, and the power management module closes the charging when the full-charge condition is reached.
Due to the adoption of the technical scheme, the technical progress of the invention is as follows.
According to the invention, the double-battery switching structure is improved, so that the dynamic distribution of system power is realized, the power is supplied to the system to the maximum extent, the charging power is not required to be reserved, the voltage stress problem existing when a switching switch is adopted for switching is avoided, the reliability of power supply is improved, and the continuous work of the portable universal life support system in the field environment is effectively ensured; in addition, program control of charging current and voltage of the fixed battery can be realized, threshold value adjustment is carried out according to application scenes, and service life of the fixed battery is prolonged.
When the portable universal life support system works, the detachable battery is preferentially adopted for supplying power, and the cruising ability of the double batteries is improved on the premise of ensuring the normal work of each functional module in the portable universal life support system; in addition, the invention can automatically realize the shutdown of the double batteries when the portable universal life support system does not work, thereby avoiding the problem of over-discharge of the batteries caused by long-term storage and further prolonging the service life of the batteries.
Drawings
FIG. 1 is an electrical schematic of the main power supply branch of the present invention;
FIG. 2 is an electrical schematic diagram of the power supply branch of the single chip microcomputer;
fig. 3 is an electrical schematic of the power management module of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
The portable universal life support system is internally provided with a life support system, a detachable battery, a fixed battery and a double-battery switching structure, wherein the output ends of the detachable battery and the fixed battery are connected with the power supply input end of the life support system and used for supplying power to the life support system; the double-battery switching structure is respectively connected with the detachable battery and the fixed battery and used for controlling the two batteries to work in a coordinated manner so as to improve stable electric energy for the life support system.
A portable universal life support system double-battery switching structure adapting to field environment is disclosed, and the specific electric principle is shown in figures 1-3. The charging system mainly comprises a buck-boost module, an A charging module, a B charging module, a switching circuit, a main power supply branch, a singlechip power supply branch and a power management module, wherein the buck-boost module is electrically connected with an external adapter, the output end of the buck-boost module is respectively connected with the input ends of the A charging module and the B charging module, and the A charging module and the B charging module respectively charge a fixed battery A and a detachable battery B; the input end of the switching circuit is respectively connected with the output ends of the fixed battery A, the detachable battery B and the power management module, the output ends of the switching circuit and the buck-boost module are respectively connected with the input ends of the main power supply branch and the singlechip power supply branch, the output end of the main power supply branch is connected with a mainboard of the life support system to supply power for the mainboard, and the output end of the singlechip power supply branch is connected with the power end of the power management module.
The power management module is used for controlling the A charging module, the B charging module, the switching circuit and the main power supply branch circuit to perform coordinated operation, so that the dynamic distribution of the power of the whole machine is realized, the power is supplied to the whole machine to the maximum extent, and the charging power does not need to be reserved.
In the embodiment, the output standard value of the adapter is 9-36V/150W, the BUCK-BOOST module adopts a BUCK-BOOST circuit, and the output standard value is 17V/150W; the charging module A and the charging module B both adopt BQ24610 chips, wherein the output standard value of the charging module A is 16.5V/100W, and the output standard value of the charging module B is 16.9V/150W.
After an output signal DC _ IN of the adapter is converted by the buck-boost module, a VBUS _17V signal is output, the VBUS _17V signal is divided into three paths, one path is directly transmitted to the main power supply branch through the first ideal diode, and the other two paths are respectively transmitted to the A charging module and the B charging module; the charging module A charges the fixed battery A to 16.5V, the fixed battery A outputs a VBUS _16.5V signal through the switching circuit, and the VBUS _16.5V signal is transmitted to the main power supply branch through the second ideal diode; the B charging module charges the detachable battery B to 16.9V, the detachable battery B outputs a VBUS _16.9V signal through the switching circuit, and the VBUS _16.59V signal is transmitted to the main power supply branch through the third ideal diode.
By arranging the ideal diode, the invention can realize seamless switching to the fixed battery A or the rechargeable battery B for power supply IN a DC _ IN power-off state, namely IN a state without alternating current power supply, and can realize voltage stress-free switching at the same time, thereby improving the reliability of the circuit; in addition, the tube voltage drop of the ideal diode can be controlled to be less than 30mV, even when 10A current passes, the conduction loss can be controlled to be within 0.3W, and the circuit loss is reduced.
The input end signal of the main power supply branch circuit is VBUS, the VBUS is one of a VBUS _17V signal, a VBUS _16.5V signal and a VBUS _16.9V signal, and the conversion of specific signals is controlled by the power management module.
Main power supply branch road is the heavy current load power supply of the life support system of back-end, mainly is voltage conversion circuit, and voltage conversion circuit is including the 28V boost circuit, 5VA buck circuit, 5VB buck circuit and the 12V buck circuit of parallelly connected setting, and 28V boost circuit, 5V buck circuit A, 5V buck circuit B and 12V buck circuit's output are connected the input of mainboard respectively, as shown in FIG. 1.
A Schottky diode is respectively connected in series between the output end of the switching circuit and the buck-boost module and the input end of the power supply branch of the single chip microcomputer. Namely, the output VBUS _17V signal output by the buck-boost module is output to the power supply branch circuit of the single chip microcomputer after passing through the first Schottky diode, and the VBUS _16.5V signal output by the switching circuit is output to the power supply branch circuit of the single chip microcomputer after passing through the second Schottky diode; and the VBUS _16.9V signal output by the switching circuit is transmitted to the power supply branch circuit of the single chip microcomputer through the third Schottky diode.
The power supply branch circuit of the single chip microcomputer mainly comprises a 3.3V conversion circuit, the output standard value of the 3.3V conversion circuit is 0.3W/3.3V, and a 3V3_ STB signal output by the 3.3V conversion circuit supplies power for the single chip microcomputer and peripheral circuits, as shown in figure 2.
In the double cell switching structure, fixed battery A and detachable battery B all adopt the mode of charging alone, and the mode that power management module control A charges the module and B charges the module and charges for the battery does: the charging method comprises the steps of firstly outputting an ISET1_ PWM signal for trickle charging, then outputting an ISET1_ PWM signal for constant-current charging, and finally outputting a VCHARGE _ PWM signal for floating voltage charging, wherein when the full-charge condition is reached, the power supply management module closes the charging.
The power limit of the dual battery switching structure is the maximum output power of the adapter, and of course, the threshold of the limit may be adjusted according to the application scenario. When the use peak power of the whole machine reaches a threshold value, the power management module controls the voltage boosting and reducing module to reduce the charging power of the charging module A and the charging module B, and the voltage boosting and reducing module directly supplies power to the whole machine; after the use power of the whole machine is reduced, the charging power to the charging module A and the charging module B is increased, and therefore dynamic power distribution during charging is achieved. The invention realizes dynamic power distribution by using a power distribution function, and starts to limit charging power when the system power reaches a limit threshold value, so as to preferentially ensure the system power supply.
In order to realize zero battery power consumption of the portable universal life support system in a shutdown state, an A cut-off circuit is connected in series between a fixed battery A and a switching circuit as well as between a charging module A, and a B cut-off circuit is connected in series between a fixed battery B and a switching circuit as well as between a charging module B; the controlled ends of the A cut-off circuit and the B cut-off circuit are respectively connected with the output end of the power management module.
In this embodiment, both the a cut-off circuit and the B cut-off circuit adopt PMOS transistors, when the adapter has no power input, that is, when an AC signal is 0, the power management module sends BAT _ EN signals to the a cut-off circuit and the B cut-off circuit respectively, closes the PMOS in a battery powered off state, cuts off the power supply of the battery to the rear-stage circuit, realizes zero power consumption of the whole machine, and simultaneously, the single chip enters a sleep state, thereby avoiding the over-discharge condition of the battery during long-term storage and transportation of the machine, and improving the service life.
In the invention, a power supply management module adopts an MCU singlechip, and control signals output by the MCU singlechip comprise A _ CHG _ EN, A _ ISET1_ PWM, A _ ISET2_ PWM, A _ WCHG _ PWM, B _ CHG _ EN, B _ ISET1_ PWM, B _ ISET2_ PWM, B _ WCHG _ PWM and an enable signal BOOST _ ADJ in a charging process; an enable signal BAT _ EN in a shutdown state; enabling signals VCCA _ EN, VCCB _ EN, VPP _ EN and VVZ _ EN of a main power supply branch circuit; the input signals of the power management module mainly include ACDC _ IN _ BC alternating current online monitoring signals, ON _ OFF _ BC instrument ON-OFF signals, BATa _ BC fixed battery a use state signals, and BAYB _ BC detachable battery use state signals, as shown IN fig. 3.
In addition, in order to monitor the working state of the battery, the invention is also provided with a battery monitoring module, register information of two batteries of the battery, including BATA _ SCL, BATA _ SDA, BATB _ SCL and BATB _ SDA, is read through I2C, and information is transmitted to an upper computer through communication ports TXD and RXD of the power management module, once the battery is over-temperature, over-voltage and over-current abnormal, the power management module controls the charging module to stop charging and give an alarm, thereby reliably ensuring the safe use of the instrument.
When the dual-battery switching structure supplies power to the main board, in view of the fact that the output voltage of the voltage boosting and reducing module in the dual-battery switching structure is larger than the output voltage of the detachable battery B, the output voltage of the detachable battery B is larger than the output voltage of the fixed battery A, the priority levels of three output voltage signals are VBUS _17V, VBUS _16.9V and VBUS _16.5V, the power supply management module can control power supply output, alternating current power supply is preferentially adopted, then the detachable battery is supplied with power, and finally the fixed battery is supplied with power, so that the service life of the portable universal life support system is further prolonged.
The specific control process of the power supply mode of the double-battery switching structure comprises the following steps: firstly, judging whether the DC _ IN is on-line or not, namely monitoring whether the voltage boosting and reducing module normally outputs 17V voltage or not, and if the voltage boosting and reducing module normally outputs, directly supplying power to a main power supply branch and a singlechip power supply branch by a power supply management module; if no AC power supply exists, the voltage boosting and reducing module has no output, the power management module supplies power to the main power supply branch and the singlechip power supply branch by using the fixed battery A and the detachable battery B as the voltage regulating signal BOOST _ ADJ at the output end of the switching circuit.
Under the battery power supply state, the output 16.9V of the detachable battery B is higher than the output 16.5V of the fixed battery A, and the detachable battery B is preferentially used for supplying power; when the using power of the whole machine is larger than the output power of the charging module B, the buck-boost module enters a current limiting mode; when the voltage drops to be not more than the output voltage of the charging module A of the fixed battery A, the charging module A of the fixed battery A is switched to supply power to the whole machine. In this way, the maximum output power of the detachable battery B is allowed to not support the work of the whole system, and the high-power functional module of the portable life support system can work normally without degradation.

Claims (10)

1. The double-battery switching structure of the portable universal life support system adapting to the field environment is characterized in that: the portable universal life support system comprises a voltage boosting and reducing module electrically connected with an external adapter, and an A charging module and a B charging module which are respectively charged by a fixed battery A and a detachable battery B, wherein the output ends of the fixed battery A and the detachable battery B are connected with a switching circuit, the output ends of the switching circuit and the voltage boosting and reducing module are connected with the input ends of a main power supply branch and a singlechip power supply branch, the output end of the main power supply branch is connected with a mainboard of the portable universal life support system to supply power for the mainboard, and the output end of the singlechip power supply branch is connected with a power management module which is used for controlling the A charging module, the B charging module, the switching circuit and the main power supply branch to coordinate operation.
2. The field environment adapted portable universal life support system dual battery switching architecture of claim 1, wherein: and an ideal diode is respectively connected in series between the output ends of the switching circuit and the buck-boost module and the input end of the main power supply branch circuit.
3. The field environment adapted portable universal life support system dual battery switching architecture of claim 2, wherein: and a Schottky diode is respectively connected in series between the output ends of the switching circuit and the buck-boost module and the input end of the power supply branch of the singlechip.
4. The field environment adapted portable universal life support system dual battery switching architecture of claim 3, wherein: a cut-off circuit is connected in series between the fixed battery A and the switching circuit as well as between the fixed battery A and the charging module A, and a B cut-off circuit is connected in series between the fixed battery B and the switching circuit as well as between the fixed battery B and the charging module B; the controlled ends of the A cut-off circuit and the B cut-off circuit are respectively connected with the output end of the power management module.
5. The field environment adapted portable universal life support system dual battery switching architecture of claim 1, wherein: the power supply branch of the single chip mainly comprises a 3.3V conversion circuit.
6. The field environment adapted portable universal life support system dual battery switching architecture of claim 4, wherein: the output voltage of the voltage boosting and reducing module in the double-battery switching structure is greater than that of the detachable battery B, and the output voltage of the detachable battery B is greater than that of the fixed battery A.
7. The field environment adapted portable universal life support system dual battery switching architecture of claim 6, wherein: when the double-battery switching structure supplies power to the main board, the detachable battery B is preferentially used for supplying power, when the service power of the whole machine is larger than the output power of the B charging module, the voltage boosting and reducing module enters a current limiting mode, the voltage drops to the output voltage of the A charging module which is not larger than the fixed battery A, and the A charging module of the fixed battery A is switched to supply power to the whole machine.
8. The field environment adapted portable universal life support system dual battery switching architecture of claim 6, wherein: the power limit value of the double-battery switching structure is the maximum output power of the adapter, when the use peak power of the whole machine reaches the limit value, the power management module controls the voltage boosting and reducing module to reduce the charging power of the charging module A and the charging module B, the voltage boosting and reducing module directly supplies power to the whole machine, and after the use power of the whole machine is reduced, the charging power of the charging module A and the charging module B is increased.
9. The field environment adapted portable universal life support system dual battery switching architecture of claim 6, wherein: the power management module of the double-battery switching structure monitors whether the voltage boosting and reducing module outputs the voltage normally or not, and if the voltage boosting and reducing module outputs the voltage normally, the power management module directly supplies power to the main power supply branch and the singlechip power supply branch; if the voltage boosting and reducing module has no output, the power supply management module supplies power to the main power supply branch and the singlechip supply branch by using the fixed battery A and the detachable battery B as a voltage regulating signal BOOST _ ADJ at the output end of the switching circuit.
10. The field environment adapted portable universal life support system dual battery switching architecture of claim 6, wherein: the mode that the power management module in the dual-battery switching structure controls the charging module A and the charging module B to charge the batteries is that the ISET1_ PWM signal is output firstly to perform trickle charging, then the ISET1_ PWM signal is output to perform constant current charging, finally the VCHARGE _ PWM signal is output to perform floating voltage charging, and when the full-charge condition is reached, the power management module closes the charging.
CN202110682173.6A 2021-06-20 2021-06-20 Portable universal life support system double-battery switching structure adapting to field environment Active CN113328496B (en)

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CN205646852U (en) * 2016-01-27 2016-10-12 深圳市中兴物联科技股份有限公司 Power route dynamic management circuit
CN107154670A (en) * 2017-06-09 2017-09-12 山东超越数控电子有限公司 A kind of double lithium battery control systems based on EC controllers
CN109038803A (en) * 2018-09-10 2018-12-18 康泰医学系统（秦皇岛）股份有限公司 The power supply module and Portable Oxygen generator of more power supply modes
CN111277039A (en) * 2020-01-21 2020-06-12 南京迈瑞生物医疗电子有限公司 Power management method and power system of operating room equipment, operating lamp and operating table

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010045779A1 (en) * 2000-05-26 2001-11-29 Huey Lee Intelligent power system
CN104917282A (en) * 2014-03-14 2015-09-16 常州校果信息服务有限公司 Intelligent power source management assembly of handheld equipment, and operating method thereof
CN205646852U (en) * 2016-01-27 2016-10-12 深圳市中兴物联科技股份有限公司 Power route dynamic management circuit
CN107154670A (en) * 2017-06-09 2017-09-12 山东超越数控电子有限公司 A kind of double lithium battery control systems based on EC controllers
CN109038803A (en) * 2018-09-10 2018-12-18 康泰医学系统（秦皇岛）股份有限公司 The power supply module and Portable Oxygen generator of more power supply modes
CN111277039A (en) * 2020-01-21 2020-06-12 南京迈瑞生物医疗电子有限公司 Power management method and power system of operating room equipment, operating lamp and operating table

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