WO2016090852A1

WO2016090852A1 - Terminal device battery and method for control of charge and discharge thereof

Info

Publication number: WO2016090852A1
Application number: PCT/CN2015/079520
Authority: WO
Inventors: 宁金星; 马彦青; 曲廷; 王建成
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-12-09
Filing date: 2015-05-21
Publication date: 2016-06-16
Also published as: WO2016090763A1; CN105743146A

Abstract

A terminal device battery (100), comprising: a battery array unit (110), itself comprising at least two batteries (BAT1, BAT2); an array control unit (120), configured so as to control the electrical connection in parallel of all batteries in the battery array unit when said unit is in charge mode and to control the electrical connection in series of all batteries in the battery array unit when said unit is not in charge mode. Also disclosed is a method for controlling the charge and discharge of the terminal device battery. Use of the present terminal device battery and control method reduces the battery array unit charge input voltage, shortening device recharge time while ensuring the high capacity of the device battery, does not require use of high-voltage batteries, and prevents charge circuit damage due to high charge voltages. The terminal device battery is low in cost and has a long product life.

Description

Terminal battery and control method thereof

Technical field

The present invention relates to the field of communications technologies, and in particular, to a terminal battery and a charging and discharging control method thereof.

Background technique

Batteries are widely used in people's daily life, ranging from mobile terminals such as electronic toys and mobile phones to electric vehicles and radar stations. In the process of using the battery, people always hope that the battery capacity is large and the charging time is short. However, the battery with a relatively large capacity in the prior art has a long time for a single charge (from the exhaustion of the battery to the full charge); the battery with a short charging time has The capacity is small and cannot meet the user's usage requirements.

In order to shorten the charging time on the basis of ensuring the battery capacity of the terminal, the prior art uses a high-voltage charger to charge the terminal battery. In this way, the battery needs to use a high-voltage battery, and at the same time, the corresponding circuit needs to be added, and the circuit is high. The influence of the voltage is easily damaged, resulting in high battery cost and short service life. At the same time, as the battery voltage increases, the abnormal charging cutoff occurs, and the battery power cannot be fully charged.

Summary of the invention

The embodiment of the invention provides a terminal battery and a charging and discharging control method thereof, so as to solve at least the technical problem that the related technology is to ensure the capacity to realize short-time charging, and the technical problem is high cost, short service life, and the battery power cannot be filled.

To achieve the above objective, an embodiment of the present invention provides a terminal battery, where the terminal battery includes:

a battery array unit, the battery array unit comprising at least two batteries;

An array control unit configured to control all of the batteries in the battery array unit to be electrically connected in parallel when the battery array unit is in a charging state; and to control the battery array unit when the battery array unit is in a non-charging state All of the cells within the battery array unit are electrically connected in series.

Preferably, the array control unit is configured to electrically connect all the batteries in the battery array unit in parallel according to a charging voltage input by the charging power source when the battery array unit is in a charging state.

Preferably, the terminal battery supplies power to the terminal by the charging power source when the battery array unit is in a charging state.

Preferably, the array control unit is further configured to switch all the batteries in the battery array unit to be electrically connected in series when the amount of power supplied by the charging power source to the terminal is less than the amount of power required for the terminal to operate, so that the The charging power source simultaneously supplies power to the terminal with the battery array unit to meet the power required for the terminal to operate.

Preferably, the battery array unit includes: a first battery, a second battery, a first switch, a second switch, and a third switch;

The positive poles of the first battery are respectively connected to the first end of the first switch and the first end of the second switch, and the negative poles of the first battery are respectively connected to the first end of the third switch, and Ground connection; a positive pole of the second battery is respectively connected to a second end of the first switch and a voltage input/output terminal, and a negative pole of the second battery and a second end of the second switch respectively The second end of the third switch is connected.

Preferably, the array control unit is configured to control the first switch and the third switch to be in a closed state when the battery array unit is in a charging state, the second switch is in an off state; and when the battery array unit is in a non-charging state The first switch and the third switch are controlled to be in an open state, and the second switch is in a closed state.

In order to achieve the above object, an embodiment of the present invention further provides a method for controlling charging and discharging of a terminal battery, the terminal battery comprising: a battery array unit, the battery array unit including at least two batteries; and charging and discharging of the terminal battery The steps of the control method include:

Controlling, when the battery array unit is in a charging state, all of the batteries in the battery array unit are electrically connected in parallel;

When the battery array unit is in a non-charging state, all of the batteries within the battery array unit are controlled to be electrically connected in series.

Preferably, the terminal battery charging and discharging control method, when the battery array unit is in a charging state, controlling all the batteries in the battery array unit to be electrically connected in parallel includes:

When the battery array unit is in a charging state, all of the batteries in the battery array unit are electrically connected in parallel according to a charging voltage input by the charging power source.

Preferably, the method for controlling charging and discharging of the terminal battery is to supply power to the terminal by the charging power source when the battery array unit is in a charging state.

Preferably, the method for controlling charging and discharging of the terminal battery further includes:

When the amount of power supplied by the charging power source to the terminal is less than the amount of power required for the terminal to operate, all the batteries in the battery array unit are electrically connected in series, so that the charging power source and the battery array unit are simultaneously The terminal is powered to meet the power required for the terminal to work.

Preferably, when the battery array unit is in a charging state, all the batteries in the battery array unit are controlled to be electrically connected in parallel:

When the battery array unit is in a charging state, controlling the first switch and the third switch to be in a closed state, and the second switch is in an off state;

When the battery array unit is in a non-charging state, all the batteries in the battery array unit are controlled to be electrically connected in series:

When the battery array unit is in a non-charging state, the first switch and the third switch are controlled to be in an off state, and the second switch is in a closed state.

The terminal battery and the charging and discharging control method thereof provided by the embodiments of the present invention, when the battery array unit is in a charging state, control all the batteries in the battery array unit to be electrically connected in parallel; when the battery array unit is in a non- In the charging state, controlling the manner in which all the batteries in the battery array unit are electrically connected in series reduces the charging input voltage of the battery array unit. During the charging process, the charging voltage of the battery array unit rises slowly, and thus the charging is performed. The impedance rise rate is slow and does not occur. Therefore, the charging impedance is too large, and the charging abnormality is cut off, and the phenomenon that the charging cannot be fully charged can shorten the charging time of the terminal battery (improving the charging speed of the terminal battery) while ensuring the high terminal battery capacity. At the same time, compared with the high-voltage rechargeable battery, the terminal battery of the invention does not need to adopt a high-voltage battery core, and the charging circuit of the battery array unit is not damaged by the influence of high-voltage charging, and the terminal battery has lower manufacturing cost and longer service life.

DRAWINGS

1 is a schematic diagram of functional modules of an embodiment of a terminal battery of the present invention;

2 is a schematic circuit diagram of a battery array unit of FIG. 1;

Fig. 3 is a flow chart showing an embodiment of a method for controlling charge and discharge of a terminal battery of the present invention.

The implementation, functional features, and advantages of the present invention will be further described in conjunction with the embodiments.

detailed description

It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The present invention further provides a terminal battery. Referring to FIG. 1, FIG. 1 is a schematic diagram of functional modules of an embodiment of a terminal battery of the present invention. In the present embodiment, the terminal battery 100 includes a battery array unit 110 and an array control unit 120. The battery array unit 110 includes at least two batteries. The array control unit 120 is configured to control all of the batteries in the battery array unit 110 to be electrically connected in parallel when the battery array unit 110 is in a charging state; and to control the battery array unit 110 when the battery array unit 110 is in a non-charging state. All of the batteries inside are electrically connected in series.

The array control unit 120 is configured to electrically connect all the batteries in the battery array unit 110 in parallel according to a charging voltage input by the charging power source when the battery array unit 110 is in a charging state. That is, in the embodiment, after the charging power source of the charger is connected to the terminal, the charger is electrically connected to the array control unit 120 of the terminal battery 100. At this time, the charger inputs a voltage signal to the array control unit 120, and the battery array unit 120 According to the input voltage signal of the charger (5V voltage signal), all the batteries in the battery array unit 110 are electrically connected in a parallel manner. In addition, since the input voltage of the charger is higher than the charging voltage of the battery array unit 110, in this embodiment, a buck voltage conversion circuit is disposed inside the terminal; after the charger is connected to the terminal, the voltage input terminal of the buck voltage conversion circuit and the charger are The voltage input terminal is electrically connected, and the voltage output end of the buck voltage conversion circuit is electrically connected to the battery display unit 110, so that the high voltage input by the charger to the buck voltage conversion circuit during the charging process is converted to a low voltage by the buck voltage conversion circuit, and then A low voltage is input to the battery array unit 110 from the voltage output terminal of the buck voltage conversion circuit.

In the present embodiment, when the battery array unit 110 is charged, by electrically connecting all the batteries in the battery array unit 110 in parallel, the charging voltage of the battery array unit 110 can be reduced, and after the charging voltage of the battery array unit 110 is lowered, As the charging time increases, the charging voltage of the battery array unit 110 rises slowly, and thus the charging impedance of the battery array unit 110 rises slowly, and the battery array unit 110 does not appear. Therefore, the charging impedance is too large, so that the charging abnormality is cut off and cannot be filled. The phenomenon of electricity. At the same time, since the charging voltage of the battery array unit 110 is low, the charging circuit of the battery array unit 110 is not damaged by the influence of the charging voltage.

The non-charging state of the battery array unit 110 in this embodiment includes: the battery array unit 110 discharge state, the battery array unit 110 does not discharge and the power supply state (terminal shutdown state), that is, the array control unit 120 is no longer in the charger. At the initial moment of the input voltage signal, all the batteries in the battery array unit are converted from the parallel electrical connection to the electrical connection in series, and all the batteries are maintained in series connection until the charger is It inputs the voltage signal again.

In this embodiment, when the battery array unit 110 is discharged (the battery array unit 110 is powered by the terminal), by electrically connecting all the batteries in the battery array unit 110 in series, the discharge voltage of the battery array unit 110 can be raised. To meet the needs of the terminal's normal power consumption.

Referring to FIG. 2, FIG. 2 is a schematic diagram showing the circuit structure of the battery array unit of FIG. 1. FIG. 2 is an example of a series connection and a parallel connection of the battery array unit in the embodiment of the present invention. The battery array unit 110 in the present example includes two batteries, including: a first battery BAT1, a second battery BAT2, a first switch K1, a second switch K2, and a third switch K3. The positive poles of the first battery BAT1 are respectively connected to the first end 1 of the first switch K1 and the first end 1 of the second switch K2, and the negative poles of the first battery BAT1 and the third switch respectively a first end 1 of K3 and a ground connection; a positive pole of the second battery BAT2 is respectively connected to a second end 2 of the first switch K1 and a voltage input/output terminal, and a negative pole of the second battery BAT2 is respectively The second end 2 of the second switch K2 and the second end 2 of the third switch K3 are connected. The voltage input/output terminal is: when the terminal battery is in a charging state, it is a voltage input terminal, and when the terminal battery is in a discharging state, it is a voltage output terminal. The array control unit 120 is configured to control the first switch K1 and the third switch K3 to be in a closed state when the battery array unit 110 is in a charging state, and the second switch K2 is in an off state, that is, the first battery BAT1 and The second battery BAT2 is electrically connected in parallel; and when the battery array unit 110 is in the non-charging state, the first switch K1 and the third switch K3 are controlled to be in an open state, and the second switch K2 is in a closed state, that is, at this time A battery BAT1 and a second battery BAT2 are electrically connected in series.

The embodiment of the present invention provides another embodiment of the terminal battery. The embodiment is improved on the basis of the above embodiment. The improvement is that when the battery array unit 110 is in the charging state, the charging power source supplies power to the terminal. The array control unit 120 is further configured to switch all the batteries in the battery array unit 110 to be electrically connected in series when the amount of power supplied by the charging power source to the terminal is less than the amount of power required for the terminal to operate, so that the charging is performed. The power supply and the battery array unit 110 simultaneously supply power to the terminal to meet the power required for the terminal to operate. That is, when the amount of power supplied by the charging power source to the terminal is less than the amount of power required for the terminal to operate, the array control unit 120 switches all the batteries in the battery array unit 110 from the parallel electrical connection mode to the series electrical connection mode. At this time, the charging power source no longer charges the battery array unit 110, only supplies power to the terminal, and the battery array unit 110 continues to flow for the terminal.

The terminal battery 100 embodiment provided by the present invention controls all the batteries in the battery array unit 110 to be electrically connected in parallel when the battery array unit 110 is in a charging state; when the battery array unit 110 When in the non-charging state, controlling the battery cells 110 to be electrically connected in series, the charging input voltage of the battery array unit 110 is lowered, and the charging voltage of the battery array unit 110 rises during charging. The speed is slow, so the charging impedance rises slowly, and does not occur. Therefore, the charging impedance is too large, and the charging abnormality is cut off, and the charging cannot be fully charged. The charging time of the terminal battery 100 can be shortened under the premise that the capacity of the terminal battery 100 is high. The charging speed of the terminal battery 100). At the same time, compared with the high-voltage rechargeable battery, the terminal battery 100 of the present invention does not need to use a high-voltage battery cell, and the charging circuit of the battery array unit 110 is not damaged by the high-voltage charging, and the terminal battery 100 has a lower manufacturing cost and a longer service life. .

The present invention provides a method for controlling charge and discharge of a terminal battery. Referring to FIG. 3, FIG. 3 is a flow chart of an embodiment of a method for controlling charge and discharge of a terminal battery according to the present invention. In an embodiment, the method for controlling charging and discharging of the terminal battery includes:

Step S10, when the battery array unit 110 is in the charging state, all the batteries in the battery array unit 110 are controlled to be electrically connected in parallel.

The terminal battery 100 described in this embodiment includes the battery array unit 110 and the array control unit 120. The battery display unit 110 includes at least two batteries. The step S10 is: when the battery array unit 110 is in the charging state, the battery in the battery array unit 110 is electrically connected in parallel according to the charging voltage input by the charging power source. That is, in the embodiment, after the charging power source of the charger is connected to the terminal, the charger is electrically connected to the array control unit 120 of the terminal battery 100. At this time, the charger inputs a voltage signal to the array control unit 120, and the battery array unit 120 According to the input voltage signal of the charger (such as a 5V voltage signal), all the batteries in the battery array unit 110 are electrically connected in parallel. In addition, since the input voltage of the charger is higher than the charging voltage of the battery array unit 110, in this embodiment, a buck voltage conversion circuit is disposed inside the terminal; after the charger is connected to the terminal, the voltage input terminal of the buck voltage conversion circuit and the charger are The voltage input terminal is electrically connected, and the voltage output end of the buck voltage conversion circuit is electrically connected to the battery display unit 110, so that the high voltage input by the charger to the buck voltage conversion circuit during the charging process is converted to a low voltage by the buck voltage conversion circuit, and then A low voltage is input to the battery array unit 110 from the voltage output terminal of the buck voltage conversion circuit.

Step S20, when the battery array unit 110 is in the non-charging state, all the batteries in the battery array unit 110 are controlled to be electrically connected in series.

Referring to FIG. 2, the battery array unit 110 in the present example includes two batteries, and may include: a first battery BAT1, a second battery BAT2, a first switch K1, a second switch K2, and a third switch K3. The positive poles of the first battery BAT1 are respectively connected to the first end 1 of the first switch K1 and the first end 1 of the second switch K2, and the negative poles of the first battery BAT1 and the third switch respectively a first end 1 of K3 and a ground connection; a positive pole of the second battery BAT2 is respectively connected to a second end 2 of the first switch K1 and a voltage input/output terminal, and a negative pole of the second battery BAT2 is respectively The second end 2 of the second switch K2 and the second end 2 of the third switch K3 are connected. The voltage input/output terminal is: when the terminal battery is in a charging state, it is a voltage input terminal, and when the terminal battery is in a discharging state, it is a voltage output terminal. The step S10 is: when the battery array unit 110 is in the charging state, the first switch K1 and the third switch K3 are controlled to be in a closed state, and the second switch K2 is in an off state, that is, the first battery BAT1 and the second battery at this time. BAT2 is electrically connected in parallel. The step S20 is: when the battery array unit 110 is in the non-charging state, the first switch K1 and the third switch K3 are controlled to be in an off state, and the second switch K2 is in a closed state, that is, the first battery BAT1 and the second The battery BAT2 is electrically connected in series.

The embodiment of the present invention provides another embodiment of a method for controlling charging and discharging of a terminal battery. The embodiment is improved on the basis of the foregoing embodiment. The improvement is that when the battery array unit 110 is in a charging state, the charging power source is directed to The terminal is powered; and when the amount of power supplied by the charging power source to the terminal is less than the amount of power required for the terminal to operate, all the batteries in the switching battery array unit 110 are electrically connected in series so that the charging power source and the battery array unit are simultaneously The terminal is powered to meet the power required for the terminal to operate. That is, when the amount of power supplied by the charging power source to the terminal is less than the amount of power required for the terminal to operate, the array control unit 120 switches all the batteries in the battery array unit 110 from the parallel electrical connection mode to the series electrical connection mode. At this time, the charging power source no longer charges the battery array unit 110, only supplies power to the terminal, and the battery array unit continues to flow for the terminal.

The embodiment of the method for controlling charging and discharging of a terminal battery provided by the present invention controls all the batteries in the battery array unit 110 to be electrically connected in parallel when the battery array unit 110 is in a charging state; when the battery array unit is at 110 In the non-charging state, controlling the charging of all the cells in the battery array unit 110 in series, the charging input voltage of the battery array unit 110 is lowered, and the charging voltage of the battery array unit 110 rises during the charging process. Slowly, the charging impedance rises slowly, and does not occur. Therefore, the charging impedance is too large, and the charging abnormality is cut off, and the charging cannot be fully charged. The charging time of the terminal battery 100 can be shortened under the premise of ensuring the high capacity of the terminal battery 100 (improving the terminal) The charging speed of the battery). At the same time, compared with the high-voltage rechargeable battery, the terminal battery 100 of the present invention does not need to use a high-voltage battery cell, and the charging circuit of the battery array unit 110 is not damaged by the high-voltage charging, and the terminal battery 100 has a lower manufacturing cost and a longer service life. .

In addition, the above terminal battery embodiment and the method for controlling the charging and discharging of the terminal battery may also adopt a boost circuit instead of the array control unit 120, and the boost circuit can realize all the cells in the battery array unit 120 without inputting a voltage signal to the charger. The connection mode of the battery is switched, but when the boost circuit is used, the boost circuit needs to be always on.

The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the present invention and the drawings are directly or indirectly applied to other related technical fields. The same is included in the scope of patent protection of the present invention.

Industrial applicability

As described above, the terminal battery and the charging and discharging control method thereof provided by the embodiments of the present invention have the following beneficial effects: the charging time of the terminal battery can be shortened under the premise of ensuring the high battery capacity of the terminal (increasing the charging speed of the terminal battery) . At the same time, compared with the high-voltage rechargeable battery, the terminal battery of the invention does not need to adopt a high-voltage battery core, and the charging circuit of the battery array unit is not damaged by the influence of high-voltage charging, and the terminal battery has lower manufacturing cost and longer service life.

Claims

A terminal battery, the terminal battery comprising:

a battery array unit, the battery array unit comprising at least two batteries;

An array control unit configured to control all of the batteries in the battery array unit to be electrically connected in parallel when the battery array unit is in a charging state; and to control the battery array unit when the battery array unit is in a non-charging state All of the cells within the battery array unit are electrically connected in series.
The terminal battery according to claim 1, wherein the array control unit is configured to trigger, when the battery array unit is in a charging state, to trigger all of the batteries in the battery array unit according to a charging voltage input by the charging power source. Electrically connected in parallel.
The terminal battery according to claim 1, wherein when the battery array unit is in a charging state, power is supplied from the charging power source to the terminal.
The terminal battery according to claim 3, wherein

The array control unit is further configured to switch all the batteries in the battery array unit to be electrically connected in series when the amount of power supplied by the charging power source to the terminal is less than the amount of power required for the terminal to operate, so that the charging power source and the charging power source are The battery array unit simultaneously supplies power to the terminal to meet the power required for the terminal to operate.
The terminal battery according to any one of claims 1 to 4, wherein the battery array unit comprises: a first battery, a second battery, a first switch, a second switch, and a third switch;

The positive poles of the first battery are respectively connected to the first end of the first switch and the first end of the second switch, and the negative poles of the first battery are respectively connected to the first end of the third switch, and Ground connection; a positive pole of the second battery is respectively connected to a second end of the first switch and a voltage input/output terminal, and a negative pole of the second battery and a second end of the second switch respectively The second end of the third switch is connected.
The terminal battery according to claim 5, wherein

The array control unit is configured to control the first switch and the third switch to be in a closed state and the second switch to be in an off state when the battery array unit is in a charging state; and to control the battery array unit when the battery array unit is in a non-charging state One switch, the third switch is in an open state, and the second switch is in a closed state.
A method for controlling charging and discharging of a terminal battery, the terminal battery comprising: a battery array unit, the battery array unit comprising at least two batteries; and the step of controlling the charging and discharging of the terminal battery comprises:

Controlling, when the battery array unit is in a charging state, all of the batteries in the battery array unit are electrically connected in parallel;

When the battery array unit is in a non-charging state, all of the batteries within the battery array unit are controlled to be electrically connected in series.
The method of controlling charging and discharging of a terminal battery according to claim 7, wherein when the battery array unit is in a charging state, controlling all of the batteries in the battery array unit to be electrically connected in parallel includes:

When the battery array unit is in a charging state, all of the batteries in the battery array unit are electrically connected in parallel according to a charging voltage input by the charging power source.
The method of controlling charging and discharging of a terminal battery according to claim 8, wherein when the battery array unit is in a charging state, power is supplied from the charging power source to the terminal.
The method for controlling charge and discharge of a terminal battery according to claim 9, further comprising:

When the amount of power supplied by the charging power source to the terminal is less than the amount of power required for the terminal to operate, all the batteries in the battery array unit are electrically connected in series, so that the charging power source and the battery array unit are simultaneously The terminal is powered to meet the power required for the terminal to work.
A method of controlling charge and discharge of a terminal battery according to any one of claims 7 to 10, wherein

The battery array unit includes: a first battery, a second battery, a first switch, a second switch, and a third switch;

The positive poles of the first battery are respectively connected to the first end of the first switch and the first end of the second switch, and the negative poles of the first battery are respectively connected to the first end of the third switch, and Ground connection; a positive pole of the second battery is respectively connected to a second end of the first switch and a voltage input/output terminal, and a negative pole of the second battery and a second end of the second switch respectively The second end of the third switch is connected.
A method of controlling charge and discharge of a terminal battery according to claim 11, wherein

When the battery array unit is in a charging state, all the batteries in the battery array unit are controlled to be electrically connected in parallel:

When the battery array unit is in a charging state, controlling the first switch and the third switch to be in a closed state, and the second switch is in an off state;

When the battery array unit is in a non-charging state, all the batteries in the battery array unit are controlled to be electrically connected in series:

When the battery array unit is in a non-charging state, the first switch and the third switch are controlled to be in an off state, and the second switch is in a closed state.