Battery, terminal, and charging system

Patent metadata

Field	Value
Publication number	US-11444470-B2
Application number	US-202016935828-A
Country	US
Kind code	B2
Filing date	Jul 22, 2020
Priority date	Sep 20, 2016
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

Abstract

Example batteries, terminals, and charging systems are described. One example battery includes a battery charging port, a battery discharging port, a battery negative port, an overcurrent protection element, a protection integrated circuit, a control switch, and an electrochemical cell. The battery charging port is connected to a positive electrode of the electrochemical cell. The control switch is connected in series between a negative electrode of the electrochemical cell and the battery negative port. The protection integrated circuit is connected in parallel to two ends of the electrochemical cell. The protection integrated circuit is further connected to the control switch so as to send a control signal to the control switch. In addition, the overcurrent protection element is connected in series between the battery discharging port and the positive electrode of the electrochemical cell. The battery provided in the present application has both a charging path and a discharging path.

First claim

The invention claimed is:

1. A battery, wherein the battery comprises a battery charging port, a battery discharging port, a battery negative port, a protection integrated circuit, a control switch, and an electrochemical cell, wherein:
the battery charging port and the battery discharging port are ports independent of each other;
the battery charging port is connected to a first electrode of the electrochemical cell, wherein a second electrode of the electrochemical cell is connected to a first end of the control switch, and wherein a second end of the control switch is connected to the battery negative port;
the protection integrated circuit is connected in parallel to electrodes of the electrochemical cell, wherein the protection integrated circuit is further connected to a third end of the control switch;
the battery discharging port is connected to the first electrode of the electrochemical cell; and
the battery charging port is connected by using a charging connection cable and the battery discharging port is connected by using a discharging connection cable, wherein the charging connection cable is of a higher specification than that of the discharging connection cable, and wherein the charging connection cable of a charging path is comparatively wider or thicker than the discharging connection cable of a discharging path to provide reduced cable impedance.

2. The battery according to claim 1 , wherein a filter circuit is further connected between the protection integrated circuit and the electrochemical cell;
wherein the protection integrated circuit comprises a positive power source input terminal and a negative power source input terminal; and
wherein the filter circuit comprises a first resistor and a capacitor, and wherein:
a first end of the first resistor is connected to a positive electrode of the electrochemical cell, wherein a second end of the first resistor is connected to a first end of the capacitor, and wherein a second end of the capacitor is connected to a negative electrode of the electrochemical cell; and
the positive power source input terminal is connected to the first end of the capacitor, wherein the negative power source input terminal is connected to the second end of the capacitor.

3. The battery according to claim 2 , wherein:
the control switch comprises a first metal-oxide semiconductor field-effect transistor (MOS transistor) and a second MOS transistor; and
the protection integrated circuit comprises a charging control terminal and a discharging control terminal, wherein:
a first end of the first MOS transistor is connected to the negative electrode of the electrochemical cell, wherein a second end of the first MOS transistor is connected to a first end of the second MOS transistor, and wherein a third end of the first MOS transistor is connected to the charging control terminal; and
a second end of the second MOS transistor is connected to the battery negative port, wherein a third end of the second MOS transistor is connected to the discharging control terminal.

4. The battery according to claim 1 , wherein:
when the battery is in a charging state,
the protection integrated circuit is configured to:
detect a current value of a charging current and a voltage value of a charging voltage; and
when the current value is less than a first current threshold and the voltage value is less than a first voltage threshold, send a turn-on instruction to the control switch; or
when the current value is greater than a first current threshold or the voltage value is greater than a first voltage threshold, send a turn-off instruction to the control switch; and

the control switch is configured to:
when receiving the turn-on instruction sent by the protection integrated circuit, perform switch turning-on to enable the charging current to flow to the electrochemical cell; or
when receiving the turn-off instruction sent by the protection integrated circuit, perform switch turning-off to cut off a charging path.

5. The battery according to claim 1 , wherein:
when the battery is in a discharging state,
the protection integrated circuit is configured to:
detect a current value of a discharging current and a voltage value of a discharging voltage; and
when the current value is greater than a second current threshold or the voltage value is smaller than a second voltage threshold, send a turn-off instruction to the control switch; and

the control switch is configured to:
when receiving the turn-off instruction sent by the protection integrated circuit, turn off the control switch to cut off a discharging path.

6. The battery according to claim 1 , wherein the protection integrated circuit further comprises a current detection terminal, and wherein the current detection terminal is connected to the battery negative port by using a second resistor.

7. A battery, wherein the battery comprises a battery charging port, a battery discharging port, a battery negative port, a protection integrated circuit, at least one control switch, and an electrochemical cell, wherein the battery charging port and the battery discharging port are ports independent of each other, and wherein:
the battery charging port is connected to a first electrode of the electrochemical cell via the at least one control switch;
a second electrode of the electrochemical cell is connected to the battery negative port;
the protection integrated circuit is connected in parallel to electrodes of the electrochemical cell; and
the battery charging port is connected by using a charging connection cable and the battery discharging port is connected by using a discharging connection cable, wherein the charging connection cable is of a higher specification than that of the discharging connection cable, and wherein the charging connection cable of a charging path is comparatively wider and thicker than the discharging connection cable of a discharging path to reduce cable impedance.

8. The battery according to claim 7 , wherein the protection integrated circuit comprises a charging control terminal and a discharging control terminal; and
wherein a third end of a first control switch is connected to the charging control terminal, and wherein the third end of a second control switch is connected to the discharging control terminal.

9. The battery according to claim 7 , wherein a filter circuit is further connected between the protection integrated circuit and the electrochemical cell;
wherein the filter circuit comprises a first resistor and a capacitor; and
wherein the protection integrated circuit comprises a positive power source input terminal (VDD) and a negative power source input terminal (VSS), and wherein:
a first end of the first resistor is connected to a positive electrode of the electrochemical cell, wherein a second end of an inductor is connected to a first end of the capacitor, and wherein a second end of the capacitor is connected to a negative electrode of the electrochemical cell; and
the positive power source input terminal is connected to the first end of the capacitor, wherein the negative power source input terminal is connected to the second end of the capacitor.

10. A battery, wherein the battery comprises a battery charging port, a battery discharging port, a battery negative port, a protection integrated circuit, a control switch, and an electrochemical cell, wherein the battery charging port and the battery discharging port are ports independent of each other, and wherein:
the battery charging port is connected to a first end of the control switch, and a second end of the control switch is connected to a positive electrode of the electrochemical cell;
a negative electr

Assignees

• Huawei Tech Co Ltd

Inventors

• Liu Xinyu
• Wang Pinghua
• Liu Ce
• Liu Yanding
• Ma Jinbo

Classifications

• H02J7/65

  against overtemperature · CPC title

• H02J7/64

  against overvoltage · CPC title

• H02J7/63

  against overdischarge · CPC title

• H02J7/61

  against overcharge · CPC title

• H02J7/751

  concerning the insertion or the connection of the batteries · CPC title