CN211296252U - Double-battery system and tablet computer - Google Patents
Double-battery system and tablet computer Download PDFInfo
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- CN211296252U CN211296252U CN202020044392.2U CN202020044392U CN211296252U CN 211296252 U CN211296252 U CN 211296252U CN 202020044392 U CN202020044392 U CN 202020044392U CN 211296252 U CN211296252 U CN 211296252U
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Abstract
The utility model discloses a double cell system and panel computer, include: the charging and discharging control system comprises a charging and discharging management unit, a logic control unit, a first battery, a second battery, a first controllable switch, a second controllable switch, a third controllable switch and a fourth controllable switch. The battery endurance of the tablet personal computer is improved through the design of double batteries, and the tablet personal computer is more suitable for the requirements of users; two logic control paths are designed to respectively control the double-battery power supply switching selection and the battery power information reading, so that the system is ensured not to switch the battery power supply back and forth while acquiring the electric quantity of the two batteries in real time, the service life of the batteries is ensured not to be influenced, and the stability of the battery for supplying power to the system is also ensured.
Description
Technical Field
The utility model relates to a power supply technical field especially relates to a double cell system and panel computer.
Background
At present, all commonly used outdoor tablet computers adopt a non-detachable single cell power supply mode, when a user uses the outdoor tablet computer, the user generally charges equipment indoors first and then takes the tablet computer outdoors for use, in general, under the condition that the tablet computer equipment is fully charged, the endurance of the tablet computer equipment can be realized for 6-7 hours, and once the electric quantity of a battery is exhausted, the equipment stops working. The cruising ability of 6-7 hours can basically meet the outdoor use requirement of a common user in one day, but the cruising ability of 6-7 hours is far from enough for the user who needs to stay outdoors for a long time or has higher requirement on the battery capacity, at the moment, if the user does not carry portable charging equipment when going out and is difficult to find a place where charging can be carried outdoors, the battery capacity is exhausted, and the tablet personal computer stops working. And even if the place for charging is found outdoors, the corresponding charging waiting time limits the action area of the user and wastes the time of the user. The user may also want the device to be able to operate continuously. Therefore, it is difficult for the conventional single battery power supply system to satisfy the demand of the user for the amount of power.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an one of purpose lies in at least, to how to overcome the problem that above-mentioned prior art exists, provides a double cell system and panel computer, can satisfy the demand of user to the electric quantity better.
In order to achieve the above object, the present invention adopts a technical solution including the following aspects.
A dual battery system, comprising: the charging and discharging control system comprises a charging and discharging management unit, a logic control unit, a first battery, a second battery, a first controllable switch, a second controllable switch, a third controllable switch and a fourth controllable switch;
the input port of the logic control unit is electrically connected with the first port of the charge and discharge management unit;
a first port of the charge and discharge management unit is electrically connected with a voltage port of the first battery through a first controllable switch; the first port of the charge and discharge management unit is also electrically connected with the voltage port of the second battery through a second controllable switch; so that a sampling port of the charge and discharge management unit can acquire the electric quantity information of the first battery or the second battery when the first controllable switch or the second controllable switch is turned on; and a first enabling port of the logic control unit is simultaneously connected with the first controllable switch and the second controllable switch; when the electric quantity information needs to be read, the logic control unit switches and outputs high and low level signals through a first enabling port of the logic control unit so as to enable and control the first controllable switch or the second controllable switch to be conducted;
a second port of the charge and discharge management unit is electrically connected with a power supply port of the first battery through a third controllable switch; the second port of the charge and discharge management unit is also electrically connected with the power supply port of the second battery through a fourth controllable switch; so that the second port of the charge and discharge management unit can be connected to the first battery or the second battery when the third controllable switch or the fourth controllable switch is turned on, and a corresponding charge and discharge loop is turned on; and a second enabling port of the logic control unit is simultaneously connected with the third controllable switch and the fourth controllable switch; when charging and discharging management is needed, the logic control unit switches and outputs high and low level signals through a second enabling port of the logic control unit to enable the third controllable switch or the fourth controllable switch to be conducted;
the charging and discharging management unit further comprises a third port used for being connected with an external charging power supply so as to charge the first battery or the second battery when the external charging power supply is connected.
Preferably, in the dual-battery system, the battery pack further includes a connector for connecting the first battery and the second battery to the dual-battery system at the same time, the connector is in a shape of Chinese character 'ao', and the length of a middle terminal of the connector is smaller than the length of terminals at two ends of the connector, so that the charging and discharging loop is delayed in the process that the first battery or the second battery is separated from the dual-battery system.
Preferably, the dual battery system further includes a hardware priority control circuit connected between the first battery and the second enable port of the charge and discharge management unit, wherein the hardware priority control circuit is configured to block the charge and discharge management unit from switching to output the high and low level signals to the third controllable switch or the fourth controllable switch through the second enable port when the first battery or the second battery is completely disconnected from the dual battery system and only a single battery exists.
Preferably, in the above dual battery system, the first enable port of the logic control unit is configured to switch the logic level once every second.
Preferably, in the above-described dual battery system, the first port of the charge/discharge management unit is electrically connected to the voltage ports of the first battery and the second battery via an SMBus bus.
Preferably, in the dual battery system, the charge and discharge management unit is a BQ24725 chip, and the logic control unit is an ITE8528 logic chip.
In a further embodiment of the present invention, a tablet computer is further provided, wherein the tablet computer comprises the above dual-battery system.
Preferably, the tablet computer accesses the state information of the first battery and the second battery in the dual-battery system in real time through corresponding interfaces, and displays the state information of the first battery and the second battery in real time.
In conclusion, owing to adopted above-mentioned technical scheme, the utility model discloses following beneficial effect has at least:
1. the double-battery scheme enables the equipment to work without a wired power supply, increases the battery endurance of the equipment, and is particularly suitable for people who work for a long time outdoors by using a tablet computer; and the equipment can continuously work without power failure by the one-by-one replacement mode of the double batteries, the current working state is reserved, and a lot of convenience is provided for the work of a user.
2. Two logic control paths (a first enabling signal GPIO2 and a second enabling signal GPIO1) are designed to respectively control the double-battery power supply switching selection and the battery information reading, so that the battery power supply is not switched back and forth while the system acquires the electric quantity of two batteries in real time, the service life of the battery is not influenced, the integrity of the battery information reading is ensured, and the stability of the battery for supplying power to the system is also ensured.
3. The hardware priority control circuit is designed so as to prevent the equipment from stopping working due to the disassembly and assembly of a single battery. Therefore, the highest priority of hardware needs to be ensured, and the device has enough stability and reliability.
4. And the first battery and the second battery are simultaneously connected into a tablet personal computer by adopting a concave connector to form a connector of the double-battery system, the connector is in a concave shape, and the length of the middle terminal of the connector is smaller than that of the terminals at two ends of the connector, so that the charging and discharging loop is delayed in the process that the first battery or the second battery is separated from the double-battery system.
5. In order to facilitate the user to disassemble and assemble the batteries, the priority of the two batteries is set to be the same, one battery can be disassembled and assembled at will, and the system can continuously work in the operation process.
Drawings
Fig. 1 is a schematic structural view of a dual battery system according to an exemplary embodiment of the present invention.
Fig. 2 is a circuit diagram of dual battery hardware priority control according to an exemplary embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and embodiments, so that the objects, technical solutions and advantages of the present invention will be more clearly understood. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
Example 1
Fig. 1 shows a dual battery system according to an exemplary embodiment of the present invention, including: the charging and discharging control system comprises a charging and discharging management unit, a logic control unit, a first battery, a second battery, a first controllable switch, a second controllable switch, a third controllable switch and a fourth controllable switch;
the input port of the logic control unit is electrically connected with the first port of the charge and discharge management unit;
a first port of the charge and discharge management unit is electrically connected with a voltage port of the first battery through a first controllable switch; the first port of the charge and discharge management unit is also electrically connected with the voltage port of the second battery through a second controllable switch; so that a sampling port of the charge and discharge management unit can acquire the electric quantity information of the first battery or the second battery when the first controllable switch or the second controllable switch is turned on; and a first enabling port of the logic control unit is simultaneously connected with the first controllable switch and the second controllable switch; when the electric quantity information needs to be read, the logic control unit switches and outputs high and low level signals through a first enabling port of the logic control unit so as to enable and control the first controllable switch or the second controllable switch to be conducted;
a second port of the charge and discharge management unit is electrically connected with a power supply port of the first battery through a third controllable switch; the second port of the charge and discharge management unit is also electrically connected with the power supply port of the second battery through a fourth controllable switch; so that the second port of the charge and discharge management unit can be connected to the first battery or the second battery when the third controllable switch or the fourth controllable switch is turned on, and a corresponding charge and discharge loop is turned on; and a second enabling port of the logic control unit is simultaneously connected with the third controllable switch and the fourth controllable switch; when charging and discharging management is needed, the logic control unit switches and outputs high and low level signals through a second enabling port of the logic control unit to enable the third controllable switch or the fourth controllable switch to be conducted;
the charging and discharging management unit further comprises a third port used for being connected with an external charging power supply so as to charge the first battery or the second battery when the external charging power supply is connected.
The system adopts an ITE8528 chip as a logic control unit and adopts BQ24725 as a charging and discharging power management chip; when the external 19V DC is plugged into the tablet personal computer, the BQ24725 supplies power to the system by using the external 19V, and converts the 19V into 13.05V through a hardware circuit to charge the battery; when the external 19V is unplugged, the BQ24725 uses the battery to power the system. And an ITE8528 chip is adopted as a logic controller to control the switching of the first battery and the second battery in the process of supplying power to the system.
Specifically, the connector is used for simultaneously connecting the first battery and the second battery into the dual-battery system, the connector is in a concave shape, the length of a middle terminal of the connector is smaller than that of terminals at two ends of the connector, so that the charging and discharging loop is delayed in the process that the first battery or the second battery is separated from the dual-battery system (namely, the lengths of first, second, seventh and eighth output terminals for supplying power to the two batteries shown in fig. 2 are larger than those of other terminals, therefore, when the batteries are disassembled and assembled, a control signal for controlling the switching of the batteries is contained on the shorter terminal, the shorter terminal is pulled out before the power supply terminal, a short time difference exists in the middle, the lost control signal is sent to a control terminal of another battery of the equipment through the control circuit, and the system is enough to be switched to another battery for supplying power in the period of time.) when the first battery is connected to the dual-battery system, and the, When the second battery is accessed simultaneously, the system uses 2 GPIOs to respectively control the charging and discharging path and the SMbus battery information reading path. When GPIO1 (second enable signal) is high, battery 1 is used as a charge-discharge path; when the GPIO1 is low, the battery 2 is used as a charge/discharge path. When the GPIO2 (first enable signal) is at a high level, reading the power information of the battery 1; when the GPIO2 is low, the power information of the battery 2 is read. And the information reading interval time of the two batteries is set to 1 s. I.e., to set GPIO2 to switch level logic once every second, resulting in a "high-low-" logic level switch. Through the mode of separately controlling the battery power supply selection and the battery information reading, the power supply of the battery is not switched back and forth when the system acquires the electric quantity of the two batteries at any time, the service life of the battery is not influenced, and the stability of the battery for supplying power to the system is also ensured.
Further, in consideration of an application scenario that a single battery supplies power and a battery is hot-plugged in and out of a tablet computer, a corresponding battery charge and discharge management path tablet computer master controller detects a detection signal of a dual-battery system (the detection signal is accompanied by enabling switching of the GPIO1 and complete charge and discharge management is performed together), and the detection signal is connected into the dual-battery system by detecting whether a first battery and a second battery are short-circuited or not (namely, whether the dual-battery system is changed into a single battery or not); because the battery detection signal of the tablet personal computer and the battery data reading GPIO2 signal both relate to switching GPIO1 to perform charging and discharging management, in order to prevent the switching from being too frequent, the logic time of the battery detection signal and the logic time of the battery data reading GPIO2 signal are combined together, so that the switching frequency is reduced, and the integrity of all battery data is ensured. Therefore, the interval time of battery detection is also 1s, as in the case of battery information reading (GPIO 2). In addition, when the single battery is supplied in a dual-battery system in the tablet personal computer or the single battery is changed into a single battery due to hot plugging, the corresponding GPIO1 cannot be selected as the logic control battery with the highest priority, otherwise, the system may have the possibility that the single battery cannot be started and the battery is pulled out and powered down, so a hardware priority control circuit as shown in fig. 2 is also built, and the hardware priority control circuit can block the control signal of the first enabling port of the charge and discharge management unit when the single battery exists; the control principle is as follows: under the condition that the double batteries exist, the double batteries detect that the IDs are short-circuited to the ground (grounded) of the respective batteries, namely the two signals are used for controlling the power supply of the batteries in the control circuit, under the condition that the two signals are both lowered, the control circuit controls the switching authority of the batteries by an EC (total control signal of a logic control unit), the total control signal switches and outputs the switching of the high state and the low state of GPIO2 to read the electric quantity of the two batteries respectively, the electrified batteries are selected for power supply, and then the GPIO1 is enabled for control, the high state supplies power to the battery 1, and the low state supplies power to the battery 2. When only one battery exists, only one battery detection signal is pulled to the ground under the condition that only a single battery is accessed, the original state of the circuit can be changed, the two signals can both bypass the control of the first enabling port GPIO1, the control circuit is changed into a constant state, namely when only the first battery exists, the BATB _ ID is low, the BATA _ ID is high, and at the moment, the control circuit only works in the state that the first battery is conducted; when only the second battery exists, the BATA _ ID is low, the BATB _ ID is high, and at this time, the control circuit only works in the state that the second battery is conducted, so that the control change is realized, and therefore, the charge and discharge can be carried out only by the currently existing battery under the current logic control (realized by the NMOS tube switch circuit shown in fig. 2).
The utility model discloses in the further embodiment, be used for above-mentioned double cell system in the panel computer to possess corresponding double cell system in making the panel computer, increase the battery duration of panel computer, make it more can satisfy user's demand. In a win10 management system adopted by the existing tablet personal computer, the dual-battery system display is supported, 2 pieces of battery equipment are created through a BIOS (basic input/output System), an interface for accessing battery information by the system is provided, the BIOS feeds back the battery information acquired by the EC to the system through the interface after processing the battery information according to the ACPI (application program interface) rule, and thus the system can accurately display the state information of two batteries in real time, wherein the displayed state information of the batteries comprises battery charging/discharging, charging/discharging remaining time and the like besides the existence and the electric quantity of the batteries.
The above description is only for the purpose of illustrating the embodiments of the present invention, and not for the purpose of limiting the same. Various substitutions, modifications and improvements may be made by those skilled in the relevant art without departing from the spirit and scope of the invention.
Claims (8)
1. A dual battery system, the system comprising: the charging and discharging control system comprises a charging and discharging management unit, a logic control unit, a first battery, a second battery, a first controllable switch, a second controllable switch, a third controllable switch and a fourth controllable switch;
the input port of the logic control unit is electrically connected with the first port of the charge and discharge management unit;
a first port of the charge and discharge management unit is electrically connected with a voltage port of the first battery through a first controllable switch; the first port of the charge and discharge management unit is also electrically connected with the voltage port of the second battery through a second controllable switch; so that a sampling port of the charge and discharge management unit can acquire the electric quantity information of the first battery or the second battery when the first controllable switch or the second controllable switch is turned on; and a first enabling port of the logic control unit is simultaneously connected with the first controllable switch and the second controllable switch; when the electric quantity information needs to be read, the logic control unit switches and outputs high and low level signals through a first enabling port of the logic control unit so as to enable and control the first controllable switch or the second controllable switch to be conducted;
a second port of the charge and discharge management unit is electrically connected with a power supply port of the first battery through a third controllable switch; the second port of the charge and discharge management unit is also electrically connected with the power supply port of the second battery through a fourth controllable switch; so that the second port of the charge and discharge management unit can be connected to the first battery or the second battery when the third controllable switch or the fourth controllable switch is turned on, and a corresponding charge and discharge loop is turned on; and a second enabling port of the logic control unit is simultaneously connected with the third controllable switch and the fourth controllable switch; when charging and discharging management is needed, the logic control unit switches and outputs high and low level signals through a second enabling port of the logic control unit to enable the third controllable switch or the fourth controllable switch to be conducted;
the charging and discharging management unit further comprises a third port used for being connected with an external charging power supply so as to charge the first battery or the second battery when the external charging power supply is connected.
2. The system of claim 1, further comprising a connector for simultaneously connecting the first battery and the second battery to the dual battery system, wherein the connector is in a recessed shape, and the length of a middle terminal of the connector is smaller than the length of terminals at two ends of the connector, so as to delay the charge and discharge loop during the process of disconnecting the first battery or the second battery from the dual battery system.
3. The system of claim 2, further comprising a hardware priority control circuit connected between the first and second batteries and the second enable port of the charge and discharge management unit, wherein the hardware priority control circuit is configured to block the charge and discharge management unit from switching the high and low signals output to the third or fourth controllable switch through the second enable port when the first or second battery is completely disconnected from the dual battery system and only a single battery is present.
4. The system of claim 1, wherein the first enabled port of the logic control unit is configured to switch logic levels once every second.
5. The system of claim 1, wherein the first port of the charge and discharge management unit is electrically connected to the voltage ports of the first and second batteries via an SMBus bus.
6. The system according to any one of claims 1 to 5, wherein the charge and discharge management unit is a BQ24725 chip, and the logic control unit is an ITE8528 logic chip.
7. A tablet computer, characterized in that the tablet computer comprises a dual battery system according to any one of claims 1-6.
8. The tablet computer of claim 7, wherein the tablet computer accesses the status information of the first battery and the second battery in the dual battery system in real time through the corresponding interfaces and displays the status information of the first battery and the second battery in real time.
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| CN202020044392.2U CN211296252U (en) | 2020-01-09 | 2020-01-09 | Double-battery system and tablet computer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111835057A (en) * | 2020-01-09 | 2020-10-27 | 成都万创科技有限责任公司 | Double-battery system, double-battery switching and charging method and tablet computer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111835057A (en) * | 2020-01-09 | 2020-10-27 | 成都万创科技有限责任公司 | Double-battery system, double-battery switching and charging method and tablet computer |
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Address after: 610041 doctor Pioneer Park, Chengdu, China, No.5 Gaopeng Avenue, high tech Zone, Chengdu, Sichuan Province Patentee after: Chengdu wanchuang Technology Co.,Ltd. Address before: 610041 doctor Pioneer Park, Chengdu, China, No.5 Gaopeng Avenue, high tech Zone, Chengdu, Sichuan Province Patentee before: VANTRON TECHNOLOGY, Inc. |
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