CN216929616U

CN216929616U - Ternary battery D361 charge-discharge protection circuit

Info

Publication number: CN216929616U
Application number: CN202123162916.1U
Authority: CN
Inventors: 詹厚举
Original assignee: Guangdong Hualongtong Technology Co ltd
Current assignee: Guangdong Hualongtong Technology Co ltd
Priority date: 2021-12-16
Filing date: 2021-12-16
Publication date: 2022-07-08
Anticipated expiration: 2031-12-16

Abstract

The utility model discloses a charging and discharging protection circuit of a ternary battery D361, which relates to the technical field of electronic circuits and comprises a control chip I C and two groups of MOS (metal oxide semiconductor) tubes connected with the control chip I C; the MOS tubes are respectively a MOS tube Q1, a MOS tube Q2, a MOS tube Q3 and a MOS tube Q4; the MOS tube Q1 and the MOS tube Q2 are a group, and the MOS tube Q3 and the MOS tube Q4 are a group and are respectively used for controlling the fast and slow charging and discharging of the battery. According to the charging and discharging protection circuit of the ternary battery D361, two charging and discharging loops are arranged in the protection circuit, and the two loops are conducted in a time-sharing mode through the control chip I C, so that the effect of controlling the charging and discharging of the battery is achieved.

Description

Ternary battery D361 charge-discharge protection circuit

Technical Field

The utility model relates to the technical field of electronic circuits, in particular to a charging and discharging protection circuit of a ternary battery D361.

Background

The ternary battery is a commonly used electric energy storage device, and has the advantages of small volume, high electric energy storage capacity and good stability. It mainly relies on lithium ions moving between the positive and negative electrodes to operate. When the lithium battery is normally charged, the lithium battery is rapidly charged and slowly charged, the rapid charging speed is high, but due to the characteristics of high charging voltage and high current, the battery can be damaged to a certain extent at the cost of reducing the charging and discharging cycle times of the battery, and the service life of the battery is shortened; although the slow charging can protect the service life of the battery, the charging speed is too slow, so that a charging and discharging protection circuit which can play a role in protection and can adjust the speed of the battery according to needs is needed.

SUMMERY OF THE UTILITY MODEL

In order to overcome the above-mentioned drawbacks of the prior art, embodiments of the present invention provide a charging/discharging protection circuit for a ternary battery D361 to solve the above-mentioned problems in the background art.

In order to achieve the purpose, the utility model provides the following technical scheme:

the charging and discharging protection circuit of the ternary battery D361 comprises a control chip IC and two groups of MOS tubes connected with the control chip IC; the MOS tubes are respectively a MOS tube Q1, a MOS tube Q2, a MOS tube Q3 and a MOS tube Q4; the MOS tube Q1 and the MOS tube Q2 are a group, and the MOS tube Q3 and the MOS tube Q4 are a group and are respectively used for controlling the fast and slow charging and discharging of the battery.

In a preferred embodiment, the diode D1 and the diode D2 are respectively connected in parallel to the two ends of the poles S and the poles Q2D of the MOS transistor Q1 and the MOS transistor Q2; the diode D1 is conducted in the opposite direction to the diode D2; the MOS tube Q1 and the MOS tube Q2G are respectively connected with the 6 th pin and the 4 th pin of the control chip IC; the MOS tube Q1 is connected with the MOS tube Q2 in series and then connected with the negative electrode of the battery, and when the MOS tube Q1 and the MOS tube Q2 are switched on at will, the MOS tube Q3 and the MOS tube Q4 are both switched off.

In a preferred embodiment, the diode D3 and the diode D4 are respectively connected in parallel to the two ends of the poles S and the poles Q3 and Q4D of the MOS transistor; the diode D3 is conducted in the opposite direction to the diode D4; the MOS tube Q3 and the MOS tube Q4G are respectively connected with the 7 th pin and the 8 th pin of the control chip IC; the MOS tube Q3 is connected with the MOS tube Q4 in series and then connected with the resistor R2 in series and then connected with the negative electrode of the battery, and when the MOS tube Q3 and the MOS tube Q4 are switched on at will, the MOS tube Q1 and the MOS tube Q2 are both switched off.

In a preferred embodiment, the charging and discharging protection circuit further includes a capacitor C1 and a resistance wire R0, the capacitor C1 and the resistance wire R0 are connected in series at two ends of the battery, and two ends of the capacitor C1 are respectively connected to the 2 nd pin and the 3 rd pin of the control chip.

The utility model has the technical effects and advantages that:

according to the charging and discharging protection circuit of the ternary battery D361, two charging and discharging loops are arranged in the protection circuit, and the two loops are conducted in a time-sharing mode through the control chip IC, so that the effect of controlling the charging and discharging of the battery is achieved.

Drawings

Fig. 1 is a schematic diagram of an overall structure of a charging/discharging protection circuit of a ternary battery D361 in the prior art.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1, the charging and discharging protection circuit of the ternary battery D361 of the present invention includes a control chip IC and two groups of MOS transistors connected to the control chip IC; the MOS tubes are respectively a MOS tube Q1, a MOS tube Q2, a MOS tube Q3 and a MOS tube Q4; the MOS tube Q1 and the MOS tube Q2 are a group, and the MOS tube Q3 and the MOS tube Q4 are a group and are respectively used for controlling the fast and slow charging and discharging of the battery.

As a further optimization improvement, in the above embodiment 1, the charge and discharge protection circuit is introduced to control the charge and discharge of the battery through two groups of MOS transistors. Specifically, diodes are connected in parallel to both ends of the MOS transistor Q1 and the MOS transistor Q2D, and the two ends of the S-pole are diode D1 and diode D2 as shown in fig. 1; the diode D1 is conducted in the opposite direction to the diode D2; MOS pipe Q1 links to each other with the battery negative pole after MOS pipe Q2 establishes ties for the quick charge-discharge return circuit of battery, MOS pipe Q3 and MOS pipe Q4 all close this moment. During charging, the control chip IC constantly monitors the voltage between the pin 2 and the pin 3, when the voltage is greater than or equal to a set overcharge cutoff voltage and meets the delay time of the overcharge voltage, the control chip IC controls the pin 4 to turn off the MOS transistor Q2, after the Q2 is turned off, the charging loop is cut off (the body diode D2 of the Q2 is also reversely cut off), at this time, the battery can only discharge, during discharging, the control chip IC also constantly monitors the voltage between the pin 2 and the pin 3, when the voltage is less than or equal to the set overdischarge cutoff voltage and reaches the delay time of the overdischarge voltage, the control chip IC turns off the Q1 through the pin 6, after the Q1 is turned off, the discharging loop is cut off (the body diode D1 of the Q1 is reversely cut off), at this time, the battery can only charge.

As a further optimization and improvement, diodes are connected in parallel to both ends of the S-pole and the Q4D poles of the MOS transistor Q3 and the MOS transistor Q4, as shown in fig. 1, the diodes are a diode D3 and a diode D4; the diode D3 is conducted in the opposite direction to the diode D4; the MOS tube Q3 is connected with the MOS tube Q4 in series and then connected with the resistor R2 in series and then connected with the negative electrode of the battery, and is used for a slow charging and discharging loop of the battery, and at the moment, the MOS tube Q1 and the MOS tube Q2 are both closed. The control chip IC can be controlled by the MCU chip, the fast and slow charging and discharging types are set in advance, and different circuits are selected to charge and discharge the battery, so that the battery is protected in the environment without fast charging and discharging; the switching circuit may be set to play a trickle function at the last stage of charge and discharge.

As a further optimization and improvement, the charging and discharging protection circuit further comprises a capacitor C1 and a resistance wire R0, the capacitor C1 and the resistance wire R0 are connected in series at two ends of the battery, two ends of the capacitor C1 are respectively connected to the second pin and the third pin of the control chip, and are used for measuring the voltage at the two ends of the battery by the control chip IC, and the resistance wire R0 is used for playing a secondary protection role after the control chip IC fails.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the utility model, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the utility model can be combined with each other without conflict;

and finally: the present invention is not limited to the above preferred embodiments, but rather, any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. Ternary battery D361 charges and discharges protection circuit, its characterized in that: the MOS transistor comprises a control chip IC and two groups of MOS transistors connected with the control chip IC; the MOS tubes are respectively a MOS tube Q1, a MOS tube Q2, a MOS tube Q3 and a MOS tube Q4; the MOS tube Q1 and the MOS tube Q2 are a group, and the MOS tube Q3 and the MOS tube Q4 are a group and are respectively used for controlling the fast and slow charging and discharging of the battery.

2. The charging and discharging protection circuit of the ternary battery D361 according to claim 1, characterized in that: the two ends of the MOS tube Q1 and the two ends of the MOS tube Q2D and the two ends of the S pole are respectively connected with a diode D1 and a diode D2 in parallel; the diode D1 is conducted in the opposite direction to the diode D2; the MOS tube Q1 and the MOS tube Q2G are respectively connected with the 6 th pin and the 4 th pin of the control chip IC; the MOS tube Q1 is connected with the MOS tube Q2 in series and then connected with the negative electrode of the battery, and when the MOS tube Q1 and the MOS tube Q2 are switched on at will, the MOS tube Q3 and the MOS tube Q4 are both switched off.

3. The charging and discharging protection circuit of the ternary battery D361 according to claim 1, characterized in that: the two ends of the pole and the S pole of the MOS transistor Q3 and the MOS transistor Q4D are respectively connected with a diode D3 and a diode D4 in parallel; the diode D3 is conducted in the opposite direction to the diode D4; the MOS tube Q3 and the MOS tube Q4G are respectively connected with the 7 th pin and the 8 th pin of the control chip IC; the MOS tube Q3 is connected with the MOS tube Q4 in series and then connected with the resistor R2 in series and then connected with the negative electrode of the battery, and when the MOS tube Q3 and the MOS tube Q4 are switched on at will, the MOS tube Q1 and the MOS tube Q2 are both switched off.

4. The charging and discharging protection circuit of the ternary battery D361 according to claim 1, characterized in that: the charging and discharging protection circuit further comprises a capacitor C1 and a resistance wire R0, the capacitor C1 and the resistance wire R0 are connected in series at two ends of the battery, and two ends of the capacitor C1 are respectively connected to a No. 2 pin and a No. 3 pin of the control chip.