CN211629881U

CN211629881U - Lithium battery charging system

Info

Publication number: CN211629881U
Application number: CN201921615015.3U
Authority: CN
Inventors: 张保记
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-26
Filing date: 2019-09-26
Publication date: 2020-10-02
Anticipated expiration: 2029-09-26

Abstract

The utility model discloses a lithium battery charging system, including casing, battery body, for the charging module of battery charging, battery body and charging module set up in the casing, are equipped with positive power cord, negative power cord and the mouth that charges fast on the battery body, still include that one end and the mouthful adaptation of charging fast and the other end are connected with the supplementary charging wire that USB connects, positive power cord and negative power cord connect the charging plug after insulating line parcel, be equipped with the through-hole that supplies supplementary charging wire to pass on the casing. The utility model discloses a set up the mouth that charges fast, the USB connects and can realize the quick charge to battery body through the cell-phone head that charges, has solved the electron weighing apparatus that the tradition adopted the battery, can not pass through heavy current, the slow problem of charging.

Description

Lithium battery charging system

Technical Field

The utility model belongs to a battery for the electron weighing apparatus provides the power, concretely relates to lithium battery charging system.

Background

The existing battery for charging the electronic weighing instrument has the problems of slow charging and even no charging after being used for a period of time.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a can realize quick charge's lithium battery charging system.

Based on above purpose, the utility model discloses take following technical scheme: the utility model provides a lithium battery charging system, includes casing, battery body, the module of charging for battery charging, and battery body and the module setting of charging are in the casing, be equipped with positive power cord, negative power cord and quick charge mouth on the battery body, still include that one end is connected with the supplementary charging wire of USB joint with quick charge mouth adaptation and the other end, charging plug is connected after insulating line parcel to positive power cord and negative power cord, be equipped with the through-hole that supplies supplementary charging wire to pass on the casing.

Preferably, the charging module includes a lithium battery protection unit and a voltage monitoring unit.

Preferably, the lithium battery protection unit comprises an overcharge protection circuit, an overdischarge protection circuit, an overcurrent protection circuit and a short-circuit protection circuit.

Preferably, the voltage monitoring unit includes a voltage limiting circuit for monitoring the same-port output/charging input voltage.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a set up the mouth that charges fast, the USB connects and can realize the quick charge to battery body through the cell-phone head that charges, has solved the electron weighing apparatus that the tradition adopted the battery, can not pass through heavy current, the slow problem of charging. In addition, the lithium battery protection unit is used for protecting the use safety of the battery, namely protecting the battery from overcharge, overdischarge, overcurrent, short circuit and the like; the voltage monitoring unit is used for monitoring the limitation of the input voltage of the same-port output or charging, only the charger meeting the voltage requirement is allowed to charge the battery body, when the charger not meeting the voltage requirement charges the battery body, the system circuit immediately turns off the input path to forbid the charging of the battery body, and the protection circuit is prevented from being damaged due to overhigh voltage.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is an assembly schematic diagram of the battery body and the auxiliary charging wire according to the present invention;

fig. 3 is a circuit schematic of the module.

In the figure: the battery comprises a shell 100, a battery body 200, a positive power line 201, a negative power line 202, a quick charging port 203, an auxiliary charging wire 300, a USB connector 301, an insulating wire 400 and a charging plug 401.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are the best embodiments of the present invention.

As shown in fig. 1-3, a lithium battery charging system includes a casing 100, a battery body 200, and a charging module for charging the battery body, wherein the battery body 200 and the charging module are disposed in the casing 100, and a positive power line 201, a negative power line 202, and a quick charging port 203 are disposed on the battery body 200. The utility model discloses still include one end be connected with the body 302 of inserting of quick charge mouth 203 adaptation, and the other end is connected with the supplementary charging wire 300 that USB connects 301, and charging plug 401 is connected after insulating line 400 parcel to positive power cord 201 and negative power cord 202, is equipped with the through-hole that supplies supplementary charging wire 300 and insulating line 400 to pass on the casing.

The utility model discloses a set up quick charge mouth 203, USB connects 301 can realize the quick charge to battery body 200 through the cell-phone head that charges, has solved the electron weighing apparatus that the tradition adopted the battery, can not pass through heavy current, the slow problem of charging. The utility model provides a quick charge mouth includes but not limited to the female seat of 5.5/2.1 type round hole, can also be other DC interfaces, and other DC interfaces are still in this application range.

The charging module comprises a lithium battery protection unit and a voltage monitoring unit. The utility model provides a lithium battery protection unit and voltage monitoring unit are the same with the lithium battery protection unit and the voltage monitoring unit principle in the charging protection circuit that current lithium cell was used.

The lithium battery protection unit comprises an overcharge protection circuit, an overdischarge protection circuit, an overcurrent protection circuit and a short-circuit protection circuit. The lithium battery protection module is used for the use safety protection of the battery, namely the protection of the battery in aspects of overcharge, overdischarge, overcurrent, short circuit and the like.

The voltage monitoring unit comprises a limiting circuit for monitoring the voltage of the same-port output/charging input, and the voltage monitoring unit is used for monitoring the voltage limitation of the same-port output or charging input.

As shown in fig. 3, the circuit schematic diagram of the lithium battery charging module includes a protection chip U1, a second MOS transistor U2, a fourth MOS transistor U4, a transistor Q1, a diode D1, a first resistor R1, a second resistor R2, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, and a capacitor C1. The protection chip U1 is DW01, and second MOS pipe U2, fourth MOS pipe U4, third MOS pipe U3 model are 8205, and triode Q1 model is 5551. Wherein, B +: connecting the positive electrode of the battery cell; b-: connecting the negative electrode of the battery cell; p +: connecting the output end of the battery or the positive electrode of the charger; p-: and the output end of the battery or the negative electrode of the charger is connected.

Taking a 3.7V single-section lithium ion battery as an example:

overcharge protection (4.30V ± 0.05V): when the battery is charged, the overcharge protection circuit automatically cuts off the charging path when the battery voltage is higher than 4.3V.

Over-discharge protection (2.5V ± 0.1V): when the voltage of the internal battery is lower than 2.5V in the process of storage or use, the over-discharge protection circuit automatically turns off the output path.

Overcurrent protection stream (3.2A ± 0.2A): in an output state, when the overcurrent protection circuit detects that the output current is continuously larger than 3.2A, the overcurrent protection circuit automatically turns off an output path.

Short-circuit protection: when the short-circuit protection circuit detects that the output end has a short-circuit phenomenon, the short-circuit protection circuit can immediately turn off the output access.

When the charging voltage is higher than 6V voltage, the system circuit immediately turns off the input path to prohibit the charging of the battery, namely, only the charger within 6V is allowed to charge the battery body, so as to prevent the damage of the protection circuit due to the overhigh voltage. Electrical characteristics: charging and inputting: 5V/1A, < 5.6V; output voltage: 2.5-4.3V +/-0.05V

Maximum output current: 2.5A; overcharge limit voltage: 4.30V +/-0.05V; over-discharge limiting voltage: 2.5V +/-0.1V; limiting current by overcurrent: 3.2A plus or minus 0.2A; static loss: <30 uA.

Take 7.2V (two lithium ion batteries) as an example:

lithium battery protection unit: overcharge protection (8.60V ± 0.05V): when the battery is charged, the overcharge protection circuit automatically cuts off the charging path when the battery voltage is detected to be higher than 4.3V.

Over-discharge protection (5.0V ± 0.1V): when the circuit detects that the voltage of the internal battery is lower than 5.0V in the storage or use process, the over-discharge protection circuit automatically turns off the output path.

Overflowing (3.2A +/-0.2A); in an output state, when the circuit detects that the output current is continuously larger than 3.2A, the overcurrent protection circuit automatically turns off the output path.

Short-circuit protection; when the circuit detects that the output end has a short circuit phenomenon, the short circuit can immediately turn off the output path.

A voltage monitoring unit: the protection circuit is used for monitoring the same-port output or charging input voltage limit, when the charging voltage is higher than 6V voltage, the system circuit immediately turns off an input path, and the battery is forbidden to be charged, namely, the battery is only allowed to be charged by a charger within 10V, and the purpose is to prevent the protection circuit from being damaged due to overhigh voltage.

Electrical characteristics:

charging and inputting: 9V/1A, < 10V; output voltage: 5.0-8.6V +/-0.05V; maximum output current: 2.5A; overcharge limit voltage: 8.60V +/-0.05V; over-discharge limiting voltage: 5.0V plus or minus 0.1V; limiting current by overcurrent: 3.2A plus or minus 0.2A; static loss: <50 uA.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a lithium battery charging system, includes casing, battery body, the module of charging for battery charging, and battery body and the module setting of charging are in the casing, its characterized in that: the battery comprises a battery body and is characterized in that a positive power line, a negative power line and a quick charging port are arranged on the battery body, the battery body further comprises an auxiliary charging wire, one end of the auxiliary charging wire is matched with the quick charging port, the other end of the auxiliary charging wire is connected with a USB connector, the positive power line and the negative power line are wrapped by an insulating wire and then connected with a charging plug, and a through hole for the auxiliary charging wire to penetrate is formed in the.

2. A lithium battery charging system as claimed in claim 1, characterized in that: the charging module comprises a lithium battery protection unit and a voltage monitoring unit.

3. A lithium battery charging system as claimed in claim 2, characterized in that: the lithium battery protection unit comprises an overcharge protection circuit, an overdischarge protection circuit, an overcurrent protection circuit and a short-circuit protection circuit.

4. A lithium battery charging system as claimed in claim 3, characterized in that: the voltage monitoring unit comprises a limiting circuit for monitoring the input voltage of the same-port output/charging.