CN111431240A - Battery module for improving charging rate and efficiency of terminal equipment and working method thereof - Google Patents
Battery module for improving charging rate and efficiency of terminal equipment and working method thereof Download PDFInfo
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- CN111431240A CN111431240A CN202010319516.8A CN202010319516A CN111431240A CN 111431240 A CN111431240 A CN 111431240A CN 202010319516 A CN202010319516 A CN 202010319516A CN 111431240 A CN111431240 A CN 111431240A
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- battery
- charging
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- electric quantity
- voltage
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/396—Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
Abstract
The invention discloses a battery module for improving the charging rate and efficiency of terminal equipment and a working method thereof, wherein the battery module comprises a battery pack, a battery board and an external interface, wherein the battery pack is formed by a plurality of identical batteries; when the batteries are charged at the early stage, the batteries are connected in series, so that the charging current of the batteries is reduced, the heat consumption of the batteries is greatly reduced, the heat generation of the batteries is reduced, the contradiction between quick charging and heat generation is solved, the charging speed of the battery module is improved, the user experience of the terminal equipment is improved, the battery module supports the output of various voltages, and the batteries are more flexibly used.
Description
Technical Field
The invention relates to the technology of electronic equipment charging, in particular to a battery module for improving the charging rate and efficiency of terminal equipment and a working method thereof.
Background
At present, the functions of terminal equipment are more and more abundant, and the demand on the capacity of a battery is higher and higher, so that the requirement on the charging speed of the terminal equipment is higher and higher, otherwise, the charging time is too long, and the user experience is seriously influenced.
The existing rapid charging method of the terminal equipment basically adopts the modes of high-voltage charging, large-current direct current and the like, but the existing rapid charging method of the terminal equipment faces the serious problem of charging and heating. Because the battery has certain internal resistance, the current entering the battery is larger during quick charging, and the power consumption consumed by the internal resistance is also larger, so that the charging efficiency is low, the temperature of the battery rises faster, and the equipment generates heat. In order to reduce the heat generation problem of the device, after the battery is charged for a period of time by a large current, the charging current must be reduced, and the heat generation is controlled, so that the duration of the rapid charging is limited, and the advantage of the rapid charging cannot be fully exerted.
According to the conventional battery management of terminal equipment, the output voltage of most batteries is 3-5V, the output voltage is single, only one voltage value can be output, and the application flexibility is not enough.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a battery module for improving the charging rate and efficiency of terminal equipment and a working method thereof, so that the charging speed and efficiency of the terminal equipment are improved, and the charging time of the terminal equipment and the problem of equipment heating caused by charging are reduced.
In order to achieve the purpose, the invention adopts the following technical application:
a battery module for improving the charging rate and efficiency of terminal equipment comprises a battery pack consisting of a plurality of batteries, a battery board and an external interface arranged on the battery board;
the current, the output voltage and the internal resistance of each battery in the battery pack are the same, and the batteries are connected through a power management circuit on the battery board; the power management circuit on the battery panel is used for detecting the electric quantity of the battery module, managing power supply output, managing charging and switching charging and power supply paths;
the external interface comprises a battery module output positive electrode, a charging input positive electrode, a battery negative electrode, a battery ID pin and a battery temperature detection pin;
when power is supplied, a power management circuit on the battery panel selects a battery with high electric quantity by detecting the electric quantity of each battery or connects a plurality of batteries in series to supply power to a peripheral system by switching a power supply path; during charging, the electric quantity of each battery is judged, the batteries with low electric quantity are preferentially charged, the charging paths are switched after the electric quantities of the batteries are consistent, the high-voltage series charging mode is started to start the constant-current charging process, and after the constant-current charging is finished and the electric quantity of the batteries is close to full charge, the charging paths are switched to the single-path charging mode to finish the final constant-voltage charging process of the batteries.
Further, the power management circuit comprises a voltage detection module, an AD conversion module and a switch control module;
the voltage detection module is respectively connected with each battery in the battery pack and is used for detecting the voltage value of each battery and the voltage difference between the batteries in real time; the AD conversion module converts the voltage value detected by the voltage detection module into a digital signal and sends the digital signal to the switch control module; the switch control module comprises a plurality of switches matched with the number of single batteries in the battery pack, the positive pole and the negative pole of each battery are respectively connected with a switch in series, the switches connected with the positive poles of the batteries in series are connected with the positive poles of the output and the charging input of the battery module, and the switches connected with the negative poles of the batteries in series are connected with the negative poles of the batteries of the battery module; and after receiving the signal sent by the AD module, the switch control module performs logic judgment, and then completes the switching of the charging and power supplying paths by controlling the states of the switches, thereby realizing power supply output management and charging management.
Furthermore, a charging input positive electrode in the external interface and a battery module output positive electrode share a pin.
Further, the battery pack is formed by packaging 2-3 batteries together.
According to the working method of the battery module, when charging is carried out, after input voltage is detected at a charging interface, the battery board firstly judges whether the electric quantity of each battery is consistent, and the battery with low electric quantity is preferentially charged; when the electric quantity of each battery is consistent, the batteries are connected in series by switching the charging paths, a high-voltage series charging mode is started, and a rapid constant-current charging process is started; when the electric quantity of each battery is close to full charge after the constant-current charging is finished, switching a charging path to connect the batteries in parallel, entering a single-path charging mode, and finishing the final constant-voltage charging process of each battery;
when power supply is output and the output voltage is required to be the voltage of a single battery, the circuit board switches a power supply path according to the electric quantity of each battery to select the battery with the largest electric quantity to output and supply power, the circuit board judges the electric quantity of each battery in the power supply process, reconfirms the battery with the largest electric quantity, and switches to the battery with the largest electric quantity at present to continue to supply power; when the required output voltage is the sum of the voltages of the batteries, the circuit board switches the power supply path to connect two or more batteries in series for power supply.
The invention has the following beneficial effects:
the battery module comprises a battery pack, a battery board and an external interface, wherein the battery pack is formed by combining a plurality of identical batteries, and the power supply output management, the charging management, the electric quantity detection, the control of a battery switch and the switching of a charging and supplying path of the battery module are carried out through a power supply management circuit on the battery board; when the battery module is charged, the battery power is detected through the battery panel and the charging path of the battery module is switched, each battery is connected in series and charged in a high-voltage mode, only a small current is needed, and a large charging power can be obtained; when high voltage is charged in the earlier stage, the batteries are connected in series, so that the charging current of the batteries is reduced, the heat consumption of the batteries is greatly reduced, the heating of the batteries is reduced, the charging current does not need to be reduced for reducing the temperature in the charging process, the quick charging can be continued for a longer time, the charging speed of the battery module is increased, the contradiction between the quick charging and the heating is solved, and the user experience of the terminal equipment is improved.
In the power supply process, the battery panel is used for detecting the electric quantity of each battery in real time, the batteries are switched in time, the electric quantities of the batteries are kept consistent as much as possible, and the damage to the batteries caused by excessive discharge is avoided; simultaneously, a plurality of batteries can be connected in series to supply power outwards by switching a power supply path through the battery board, so that the output of various voltages can be supported, and the batteries are more flexibly used. For terminal equipment with OTG requirements, the battery can directly output a high voltage without an external booster circuit, and the efficiency of OTG high-voltage output is greatly improved.
Drawings
FIG. 1 internal structure view of battery pack
FIG. 2 battery pack power supply process diagram
FIG. 3 is a diagram of a battery charging process
FIG. 4 functional structure diagram of battery plate
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are not intended to limit the invention thereto.
As shown in fig. 1, the battery module of the present invention includes a battery pack including a plurality of batteries, a battery board, and an external interface disposed on the battery board; taking a lithium battery module as an example, a plurality of identical lithium batteries are contained in one lithium battery module, the output voltage of each internal battery is consistent with the voltage required by terminal equipment, 2-3 batteries are suggested to be combined in one package to form a battery pack, the current, the output voltage and the internal resistance of each battery in the battery pack are completely consistent, and external interfaces of each battery are unified into one group.
The external interface comprises a battery output positive electrode, a battery negative electrode, a battery ID pin and a battery temperature detection pin, can be used for charging the input positive electrode pin independently, and can also share the pin with the battery output positive electrode.
As shown in fig. 2, the power management circuit on the battery panel is used to implement power output management, charge management, power detection, control of the battery switch, and switching of the charging and power supply paths. When power is supplied, the power management circuit on the battery panel selects one battery to supply power to the peripheral system through electric quantity, and the circuit can be turned on or turned off by using the switch, so that the electric quantity of each battery is ensured to be close to each other as much as possible. The circuit board can also select several batteries to be connected in series for output, so that various power supply voltages can be flexibly provided for peripheral equipment to select.
As shown in fig. 3, after detecting that there is input voltage at the charging interface, the battery panel first determines whether the electric quantities of the batteries are consistent, and if the electric quantities of one or more batteries are relatively low, the battery with low electric quantity is preferentially charged. And when the electric quantity of each battery is consistent, starting a high-voltage series charging mode and starting a rapid constant-current charging process. And after the constant-current charging is finished and the electric quantity of the battery is close to full charge, switching to a single-path charging mode to finish the final constant-voltage charging process of each battery.
As shown in fig. 4, the power management circuit in the battery panel includes a voltage detection module, an AD conversion module, and a switch control module. The voltage detection module is respectively connected with each battery in the battery pack, namely the voltage value of each internal battery can be detected, and the voltage difference among the three groups of batteries can also be detected. The voltage detection module detects the voltage values in real time and sends the voltage values to the AD conversion module in real time. The AD conversion module converts the voltage value detected by the voltage detection module into a digital signal and sends the digital signal to the switch control module. The switch control module comprises a plurality of switches matched with the number of single batteries in the battery pack, the positive pole and the negative pole of each battery are respectively connected in series with a switch, the switches connected in series with the positive poles of the batteries are connected with the positive poles of the output and the positive poles of the charging input of the battery module, the switches connected in series with the negative poles of the batteries are connected with the negative poles of the batteries of the battery module, and the on-off of each switch is controlled by the switch control module.
The number of each module of the power management circuit with different battery numbers can be adjusted correspondingly according to a specific scheme. Taking a battery pack consisting of 3 batteries as an example, the switch control module comprises eight switches S1-S8, and after receiving the signal sent by the AD module, the switch control module carries out logic judgment first and then controls the states of 8 switches to complete the power management part.
In the power supply process, the switch control module selects the battery with the highest battery voltage to supply power according to the battery state output by the AD module. If the voltage of the battery 1 is the highest, the switches S1, S6 are turned off, and the remaining switches are turned off. If the voltage difference between the battery and the battery 2 with the highest voltage in the other two batteries is more than 0.1V after the battery is operated for a period of time, the switch control part closes S2 and S7, then disconnects S1 and S6 and switches to the battery 2 for supplying power. If the voltages of the three batteries are all low and are close to the discharge capacity depletion state, the switching condition can be adjusted from 0.1V to 0.3V, and the frequent switching of the battery switches is prevented. Finally, through the switching of the battery switch, the electric quantity of 3 batteries is relatively close, 3 batteries are used in a balanced mode, and the service life of the whole battery pack is guaranteed. If the battery pack is required to output other voltage values, the switches S1, S4 and S7 are turned off, the output voltage value is the sum of two batteries, and the switches S1, S4, S5 and S8 are turned off, the output voltage value is the sum of three batteries.
In the charging process, a single battery with the lowest battery electric quantity is charged firstly, and a charging chip outputs low voltage for a period of time firstly. Because the output voltage is managed when the power is supplied, the voltage values of the three batteries are not greatly different, and the process only needs a short time. The charging of each battery can be individually controlled by closing the switches S1/S6, S2/S7 or S3/S8, the electric quantity of the three batteries is relatively close after low-voltage charging, and then the next high-voltage series charging is carried out. The switch control module turns off the switches S1, S4, S5 and S8, and the rest switches are turned off, so that the series connection quick charging can be realized.
The working method of the battery module comprising the battery pack consisting of a plurality of batteries comprises the following steps:
when power supply is output, if the required output voltage is the output voltage of a single battery, the circuit board selects the battery with the most electric quantity according to the electric quantity condition of each battery, and the corresponding switch is turned on to output and supply power. After the power is supplied for a period of time, the circuit board judges the electric quantity again, reconfirms that the electric quantity of the battery is the maximum, and switches to the battery with the maximum electric quantity to supply power. The circuit board supplies power by selecting the battery with the largest electric quantity, so that the electric quantity of each internal battery is close to the electric quantity of each internal battery as much as possible.
The circuit board can supply power by connecting two or more batteries in series through the change-over switch, so that one battery can realize the flexible switching of a plurality of output voltages. As mentioned above, the battery pack consisting of 3 4.5V output batteries can realize three supply voltages of 4.5V, 9V and 13.5V. If the device needs to support OTG, the battery series connection can directly output a value higher than the voltage of the battery, and a booster circuit is not needed to be added in the terminal device, so that the cost can be reduced, and the output efficiency can be improved.
In the charging process, the battery board preferentially charges the batteries with less electric quantity according to the electric quantity condition of each battery. When the electric quantity of each battery is consistent, the high-voltage series charging mode is started, the series charging channel is opened, all the internal batteries are charged simultaneously, so that larger charging power can be realized only by using smaller charging current, the heat power consumption is very small, and higher charging speed and efficiency are realized. And when the electric quantity of the battery is close to full charge, returning to the single-path charging mode to finish the final constant-voltage charging process of each battery.
For example, the battery pack contains 3 cells, each cell has an output voltage of 4.5V, and the internal resistance of each cell during charging is 0.1 ohm. If the common charging mode of a lithium battery is adopted, the heat power consumption generated by the internal resistance is 0.9W when the charging current is 3A. And by adopting a series charging method, the three batteries are charged by using the charging current of 1A at the same time, the charging effect of the original charging current of 3A can be achieved, the thermal power consumption generated by each battery is 0.1W, and the thermal power consumption generated by the whole battery pack is only 0.3W.
The present invention is described in detail with reference to the above embodiments, and those skilled in the art will understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (5)
1. The utility model provides a promote battery module of terminal equipment charge rate and efficiency which characterized in that: the battery pack comprises a battery pack consisting of a plurality of batteries, a battery board and an external interface arranged on the battery board;
the current, the output voltage and the internal resistance of each battery in the battery pack are the same, and the batteries are connected through a power management circuit on the battery board; the power management circuit on the battery panel is used for detecting the electric quantity of the battery module, managing power supply output, managing charging and switching charging and power supply paths;
the external interface comprises a battery module output positive electrode, a charging input positive electrode, a battery negative electrode, a battery ID pin and a battery temperature detection pin;
when power is supplied, a power management circuit on the battery panel selects a battery with high electric quantity by detecting the electric quantity of each battery or connects a plurality of batteries in series to supply power to a peripheral system by switching a power supply path; during charging, the electric quantity of each battery is judged, the batteries with low electric quantity are preferentially charged, the charging paths are switched after the electric quantities of the batteries are consistent, the high-voltage series charging mode is started to start the constant-current charging process, and after the constant-current charging is finished and the electric quantity of the batteries is close to full charge, the charging paths are switched to the single-path charging mode to finish the final constant-voltage charging process of the batteries.
2. The battery module for improving the charging rate and efficiency of the terminal device according to claim 1, wherein: the power supply management circuit comprises a voltage detection module, an AD conversion module and a switch control module;
the voltage detection module is respectively connected with each battery in the battery pack and is used for detecting the voltage value of each battery and the voltage difference between the batteries in real time; the AD conversion module converts the voltage value detected by the voltage detection module into a digital signal and sends the digital signal to the switch control module; the switch control module comprises a plurality of switches matched with the number of single batteries in the battery pack, the positive pole and the negative pole of each battery are respectively connected with a switch in series, the switches connected with the positive poles of the batteries in series are connected with the positive poles of the output and the charging input of the battery module, and the switches connected with the negative poles of the batteries in series are connected with the negative poles of the batteries of the battery module; and after receiving the signal sent by the AD module, the switch control module performs logic judgment, and then completes the switching of the charging and power supplying paths by controlling the states of the switches, thereby realizing power supply output management and charging management.
3. The battery module for improving the charging rate and efficiency of the terminal device according to claim 1, wherein: and a charging input positive electrode in the external interface and an output positive electrode of the battery module share a pin.
4. The battery module for improving the charging rate and efficiency of the terminal device according to claim 1, wherein: the battery pack is formed by packaging 2-3 batteries together.
5. A method of operating the battery module of claims 1-4, wherein:
during charging, after detecting that input voltage exists at a charging interface, the battery panel firstly judges whether the electric quantity of each battery is consistent, and preferentially charges the battery with low electric quantity; when the electric quantity of each battery is consistent, the batteries are connected in series by switching the charging paths, a high-voltage series charging mode is started, and a rapid constant-current charging process is started; when the electric quantity of each battery is close to full charge after the constant-current charging is finished, switching a charging path to connect the batteries in parallel, entering a single-path charging mode, and finishing the final constant-voltage charging process of each battery;
when power supply is output and the output voltage is required to be the voltage of a single battery, the circuit board switches a power supply path according to the electric quantity of each battery to select the battery with the largest electric quantity to output and supply power, the circuit board judges the electric quantity of each battery in the power supply process, reconfirms the battery with the largest electric quantity, and switches to the battery with the largest electric quantity at present to continue to supply power; when the required output voltage is the sum of the voltages of the batteries, the circuit board switches the power supply path to connect two or more batteries in series for power supply.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010319516.8A CN111431240A (en) | 2020-04-22 | 2020-04-22 | Battery module for improving charging rate and efficiency of terminal equipment and working method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010319516.8A CN111431240A (en) | 2020-04-22 | 2020-04-22 | Battery module for improving charging rate and efficiency of terminal equipment and working method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113054698A (en) * | 2020-12-29 | 2021-06-29 | 潍柴动力股份有限公司 | Battery charging method, device, control unit and storage medium |
| CN114619909A (en) * | 2022-04-22 | 2022-06-14 | 广东汇天航空航天科技有限公司 | Charging control method and device, charging system and charging equipment of electric aircraft |
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Application publication date: 20200717 |