CN212012182U

CN212012182U - Precious charge-discharge management circuit charges

Info

Publication number: CN212012182U
Application number: CN202020627846.9U
Authority: CN
Inventors: 向军
Original assignee: Shenzhen Weiyi Fashion Gift Co ltd
Current assignee: Shenzhen Weiyi Fashion Gift Co ltd
Priority date: 2020-04-23
Filing date: 2020-04-23
Publication date: 2020-11-24
Anticipated expiration: 2030-04-23

Abstract

The utility model discloses a treasured charge-discharge management circuit charges, it includes: the battery protection circuit module is electrically connected with the storage battery, the charge and discharge control module is electrically connected with the storage battery, the external discharge control module is electrically connected with the external electric quantity checking key control circuit module, the battery protection circuit module and the external discharge control module jointly control the storage battery to be charged and discharged, and the electric quantity checking key control circuit module triggers the charge and discharge control module to indicate the residual electric quantity of the current storage battery in real time. Compared with the prior art, the utility model discloses a precious charge-discharge management circuit charges, it adopts solitary charge-discharge control circuit design, is applicable to the notebook integration, compromises advantages such as low cost, volume frivolous simultaneously.

Description

Precious charge-discharge management circuit charges

Technical Field

The utility model relates to a precious charge-discharge control technical field charges especially relates to a precious charge-discharge management circuit charges.

Background

The power bank has different parameter requirements according to an application scene and corresponding electronic equipment, and the designed charging and discharging management performance is different. The charging and discharging management circuit part of the existing charging treasure is generally integrated in the charging treasure, and charging and discharging ports of external power utilization equipment can be automatically detected through plugging. However, for a power supply integrated in a notebook or the like, a circuit needs to be designed separately, and special requirements such as lightness and thinness need to be satisfied in addition to cost.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art not enough, provide a precious charge-discharge management circuit charges suitable for notebook is integrated.

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

a treasured charge-discharge management circuit charges, it includes: the battery protection circuit module is electrically connected with the storage battery, the charge-discharge control module is electrically connected with the storage battery, the external discharge control module is electrically connected with the external discharge control module, the external discharge control module is electrically connected with an electric quantity checking button control circuit module, the battery protection circuit module and the external discharge control module jointly control the storage battery to be charged and discharged, and the electric quantity checking button control circuit module triggers to indicate the residual electric quantity of the current storage battery in real time.

Wherein the battery protection circuit module includes: the protection chip U2, the model of protection chip U2 is: in the SSM33, a fourth pin of the protection chip U2 is electrically connected to the positive end of the storage battery after being connected with a resistor R2 in series, a capacitor C5 for filtering is also connected in series between the negative end of the storage battery and the fourth pin of the protection chip U2, and a first pin and a second pin of the protection chip U2 are electrically connected to the negative end of the storage battery; the fifth pin of the protection chip U2 is connected in series with a resistor R5 and then grounded, and the seventh pin and the eighth pin of the protection chip U2 are both grounded.

Wherein, the charge and discharge control module includes: the main control chip U1, the model of main control chip U1 is: according to the EAT9720 or EAT9740, a second pin, a third pin and a fourth pin of a main control chip U1 are respectively connected with resistors with different resistance values in series and then are electrically connected with a light-emitting LED for indicating the current electric quantity state of the storage battery, wherein the first pin of the main control chip U1 is connected with an inductor L1 in series and then is electrically connected with the positive end of the storage battery, an isolation capacitor C1 is further connected in series between the node between the positive end of the storage battery and the inductor L1 and the ground, a seventh pin of the main control chip U1 is connected with a capacitor C2 in series and then is grounded, a capacitor C3 is further connected in parallel with two ends of a capacitor C2, an eighth pin of the main control chip U1 is also grounded, a sixth pin of the main control chip U1 is connected with the capacitor C4 in series and then is grounded.

Wherein, the external discharge control module includes: MCU, MCU 'S first pin is the operating voltage pin, and the second pin is key signal' S access pin, MCU 'S eighth pin ground connection, MCU' S seventh pin is established ties in the one end of resistance R11, and the other end electricity of resistance R11 is connected in triode Q2 'S G utmost point, still establish ties between triode Q2' S the S utmost point and the G utmost point and have a resistance R12, and the D utmost point of triode Q2 is connected in direct current power supply after establishing ties a resistance R9.

Wherein, button control circuit module includes is looked over to the electric quantity: the key switch S1 is electrically connected to the first pin of the MCU, the other end of the key switch S1 is connected in series with a resistor R7, the other end of the resistor R7 is electrically connected to the base of a triode Q1, a resistor R8 is connected in series between the base and the emitter of a triode Q1, the collector of the triode Q1 is electrically connected to the second pin of the MUC, and a resistor R6 is also connected in series between the collector of the triode Q1 and the first pin of the MCU.

The model of the triode Q1 is as follows: s8050.

The model of the triode Q2 is as follows: SI 2300.

Compared with the prior art, the utility model discloses a precious charge-discharge management circuit charges, it adopts solitary charge-discharge control circuit design, is applicable to the notebook integration, compromises advantages such as low cost, volume frivolous simultaneously.

The foregoing is a summary of the present invention, and other objects, features and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments, which is provided for the purpose of illustration and understanding of the present invention.

Drawings

Fig. 1 is the utility model discloses a precious charge-discharge management circuit's of charging battery protection circuit module part circuit diagram.

Fig. 2 is the utility model discloses a key control circuit module part circuit diagram is looked over to precious charge-discharge management circuit's that charges electric quantity.

Fig. 3 is the utility model discloses a precious charge-discharge control module part circuit diagram that charges of management circuit.

Fig. 4 is the utility model discloses a precious charge-discharge management circuit's of charging partial circuit diagram of external discharge control module.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be described in further detail with reference to the accompanying drawings and the following detailed description.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "secured" are to be construed broadly and can, for example, be connected or detachably connected or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above should not be understood to necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by one skilled in the art.

Referring to fig. 1 to 4, the present embodiment provides a charge and discharge management circuit for a charger, including: the battery protection circuit module is electrically connected with the storage battery, is used for protecting the storage battery from impact such as overcurrent and overvoltage when an external power supply charges the storage battery, and is electrically connected with the charge and discharge control module of the storage battery, the charge and discharge control module is used for controlling a plurality of indicator lamps electrically connected with the charge and discharge control module so as to display the current circuit condition, the external discharge control module is electrically connected with the external discharge control module of the storage battery, the external discharge control module controls the on-off of a path of the storage battery for external discharge so as to charge the storage battery, the external discharge control module is electrically connected with an electric quantity check key control circuit module, when the storage battery is in a non-use state, only a key is required to be triggered, the key transmits a trigger signal to the external. The battery protection circuit module and the external discharge control module jointly control the storage battery to be charged and discharged, and the electric quantity checking key control circuit module triggers to indicate the residual electric quantity of the current storage battery in real time.

Referring to fig. 1 again, the battery protection circuit module includes: the protection chip U2, the model of protection chip U2 is: a capacitor C5 for filtering is also connected in series between the negative end and the fourth pin of the storage battery of the SSM33, so that the fourth pin is used for protecting the working voltage pin of the chip U2, the fourth pin of the protection chip U2 is connected in series with a resistor R2 and then is electrically connected to the positive end BAT + of the storage battery, and the first pin and the second pin of the protection chip U2 are electrically connected to the negative end BAT-; the fifth pin of the protection chip U2 is connected in series with a resistor R5 and then is grounded to GND, and the seventh pin and the eighth pin of the protection chip U2 are both grounded to GND, so that a complete lithium ion battery protection circuit module is formed. In addition, according to the charging and discharging current of the battery, a 9205 double MOS tube can be added to increase the charging and discharging current.

Referring to fig. 3 again, the charge and discharge control module includes: the main control chip U1, the model of main control chip U1 is: EAT9720 or EAT9740 is a charger main control chip for 5V/1A-2A synchronous rectification boost discharge or 5V/1A-2A lithium ion battery synchronous rectification charge, and has a high-efficiency charge mode and boost discharge mode with the same interface. It requires only one inductor as a directional and proprietary automatic mode detection and switching scheme. It also includes a fuel gauge system for indicating the amount of power. The key is loaded with 100MA current, and then the power indicator lamp is started to display the current power.

The sixth pin of the main control chip U1 is a working voltage pin, the fifth pin of the main control chip U1 is a charging current setting pin of the main control chip U1, and the resistor R4(150 kilo-ohm) is a charging current setting resistor. The second pin, the third pin and the fourth pin of the main control chip U1 are respectively connected in series with a resistor R1, R3 with different resistances and then electrically connected to the light emitting LED1, LED2, LED3 for indicating the current electric state of the battery, wherein the first pin of the main control chip U1 is connected in series with an inductor L1 and then electrically connected to the positive terminal BAT + of the battery, wherein an isolation capacitor C1 is also connected in series between the node between the positive terminal BAT + of the battery and the inductor L1 and the ground, the seventh pin of the main control chip U1 is connected in series with a capacitor C2 and then grounded GND, both ends of the capacitor C2 are also connected in parallel with a capacitor C3, both the capacitor C2 and the capacitor C3 are filter capacitors, the eighth pin of the main control chip U1 is also grounded GND, the sixth pin of the main control chip U1 is connected in series with a capacitor C4 and then grounded, and the capacitor C4(100nF) is a filter capacitor. The fifth pin is connected with a resistor R4 in series and then is grounded to GND.

The working process is as follows:

and (3) charging mode: when an external power supply is connected, filtering is carried out through a capacitor C2 and a capacitor C3 (both are 22uF capacitors), the filtered signal enters a main control chip U1 from a seventh pin of the main control chip U1 to be processed and detected and identified, then the filtered signal is output through a first pin of the main control U1, enters a lithium ion battery protection circuit through a rectifying capacitor C1(22uF) of an external inductor L1(2.2uH) and charges the lithium ion battery, the main control chip U1 can adjust a charging mode of the lithium ion battery according to the voltage feedback of the lithium ion battery, and finally the charging of the lithium ion battery is completed;

a discharging mode: when an external load is connected, after the identification of the main control chip U1 is started and the lithium ion battery voltage passes through the lithium ion battery protection circuit, the lithium ion battery voltage enters a first pin of the main control chip U1 for synchronous boosting treatment through energy storage rectification of an external inductor L1(2.2uH) and a C1(22uF), then the lithium ion battery voltage is output through a seventh pin of the main control chip U1 and filtered through a capacitor C2 and a capacitor C3 (both 22uF capacitors), and stable direct current voltage of 5V/1-2A is output;

and (3) electric quantity display: the second pin, the third pin and the fourth pin of the main control chip U1 are control pins of an electric quantity indicator lamp, the resistor R1 and the resistor R3 (both are 1000 ohm resistors) adjust the light emitting brightness of the electric quantity indicator lamp, the main control chip U1 is divided into 4 electric quantity grades according to the lithium ion battery voltage, namely 0-25% (bright LED1), 25-50% (bright LED1 and LED2), 50-75% (bright LED1, LED2 and LED3), 75-100% (bright LED1, LED2, LED3 and LED4), the highest electric quantity indicator lamp flickers during charging, and the current electric quantity is indicated and does not flicker during discharging.

Referring to fig. 4 again, the external discharge control module includes: the eighth pin of the MCU U3 and the MCU U3 is grounded, the first pin of the MCU U3 is a working voltage pin of the MCU U3, the second pin of the MCU U3 is an access pin of a key signal, the seventh pin of the MCU U3 is a control pin of an external switch circuit, and the eighth pin of the MCU U3 is a grounding pin. The seventh pin of the MCU U3 is connected in series to one end of a resistor R11, the other end of the resistor R11 is electrically connected to the G-pole of the transistor Q2, a resistor R12 is also connected in series between the S-pole and the G-pole of the transistor Q2, and the D-pole of the transistor Q2 is connected in series to a resistor R9 and then electrically connected to the dc power VCC-. When the key S1 is pressed twice continuously, a key signal enters the MCU U3 from the second pin of the MCU U3 through the resistor R10(1000 ohms), at the moment, the seventh pin of the MCU U3 outputs a high level and then reaches the G pole of the triode Q2(SI2300) through the resistor R11(1000 ohms), at the moment, the D pole and the S pole of the triode Q2(SI2300) are conducted, and a loop from VCC-to ground is opened, namely, a power supply loop to the outside is opened; resistor R12(10 kohm) ensures that transistor Q2(SI2300) is in the off state when transistor Q2(SI2300) G is at a very low level. The continuous key S1 is continuously pressed twice again, the key signal enters the MCU U3 from the second pin of the MCU U3 through the resistor R10(1000 ohm), at the moment, the seventh pin of the MCU U3 outputs low level, the low level goes to the G pole of the triode Q2(SI2300) through the resistor R11(1000 ohm), at the moment, the D pole and the S pole of the triode Q2(SI2300) are cut off, and the VCC-to-ground loop is closed, namely the power supply loop to the outside is closed. The circuit is a standby circuit which can be used when external equipment needing to control the power output is arranged.

Referring to fig. 2 again, the electric quantity viewing key control circuit module includes: the key switch S1 is electrically connected to the first pin OUT/IN of the MCU, the other end of the key switch S1 is connected IN series with a resistor R7, the other end of the resistor R7 is electrically connected to the base of a triode Q1, a resistor R8 is connected IN series between the base and the emitter of the triode Q1, the collector of the triode Q1 is electrically connected to the second pin of the MUC, and a resistor R6 is also connected IN series between the collector of the triode Q1 and the first pin of the MCU. When the charger is in a static state, all indicator lights are in an off state, when a key S1 is pressed, the base electrode of a triode Q1(S8050) is changed into a high level through a resistor R7(1000 ohms), the collector electrode and the emitter electrode of the triode Q1(S8050) are conducted at the moment, the 100mA current is connected to the ground through the resistor R6(51 ohms), the main control chip U1 recognizes that the load is connected, the power indicator light is started, the power indicator light is automatically turned off when no load exists for about 30 seconds, and the resistor R8(10 kiloohms) ensures that the Q1(S8050) is in an off state when the base electrode of the Q1(S8050) is in a low level.

In this embodiment, the type of the transistor Q1 is: s8050, the model of the triode Q2 is as follows: SI 2300. Wherein the storage battery is a lithium ion battery.

The charge and discharge management circuit of the charge pal is suitable for leather electronic products such as bags, backpacks, satchels, purses, handbags, briefcases, notepads, notebooks, zipper bags, albums and the like.

The technical content of the present invention is further described by the embodiments only, so that the reader can understand it more easily, but the embodiments of the present invention are not limited thereto, and any technical extension or re-creation according to the present invention is protected by the present invention. The protection scope of the present invention is subject to the claims.

Claims

1. A precious charge-discharge management circuit that charges, characterized by includes: the battery protection circuit module is electrically connected with the storage battery, the charge-discharge control module is electrically connected with the storage battery, the external discharge control module is electrically connected with the external discharge control module, the external discharge control module is electrically connected with an electric quantity checking button control circuit module, the battery protection circuit module and the external discharge control module jointly control the storage battery to be charged and discharged, and the electric quantity checking button control circuit module triggers to indicate the residual electric quantity of the current storage battery in real time.

2. The circuit of claim 1, wherein the battery protection circuit module comprises: the protection chip U2, the model of protection chip U2 is: in the SSM33, a fourth pin of the protection chip U2 is electrically connected to the positive end of the storage battery after being connected with a resistor R2 in series, a capacitor C5 for filtering is also connected in series between the negative end of the storage battery and the fourth pin of the protection chip U2, and a first pin and a second pin of the protection chip U2 are electrically connected to the negative end of the storage battery; the fifth pin of the protection chip U2 is connected in series with a resistor R5 and then grounded, and the seventh pin and the eighth pin of the protection chip U2 are both grounded.

3. The treasured charge and discharge management circuit of claim 1, wherein the charge and discharge control module comprises: the main control chip U1, the model of main control chip U1 is: according to the EAT9720 or EAT9740, a second pin, a third pin and a fourth pin of a main control chip U1 are respectively connected with resistors with different resistance values in series and then are electrically connected with a light-emitting LED for indicating the current electric quantity state of the storage battery, wherein the first pin of the main control chip U1 is connected with an inductor L1 in series and then is electrically connected with the positive end of the storage battery, a rectifying capacitor C1 is further connected in series between the node between the positive end of the storage battery and the inductor L1 and the ground, a seventh pin of the main control chip U1 is connected with a capacitor C2 for filtering in series and then is grounded, a capacitor C3 for filtering is further connected in parallel with two ends of the capacitor C2, an eighth pin of the main control chip U1 is also grounded, a sixth pin of the main control chip U1 is connected with the capacitor C4 in series and then is grounded, and a.

4. The charger baby charge and discharge management circuit according to claim 3, wherein the external discharge control module comprises: the MCU, the eighth pin ground of MCU, the seventh pin of MCU connects in series in the one end of resistance R11, the other end electricity of resistance R11 is connected in the G of triode Q2, still establish ties a resistance R12 between the S of triode Q2 and the G, the D of triode Q2 connects in series behind a resistance R9 and connects in the direct current power supply.

5. The treasured that charges charge and discharge management circuit of claim 4, wherein, the button control circuit module is looked up to the electric quantity includes: a key switch S1 electrically connected to the first pin of the MCU, a resistor R7 connected in series with the other end of the key switch S1, a resistor R7 connected in series with the other end of the resistor R7 connected to the base of a transistor Q1, a resistor R8 connected in series between the base and the emitter of a transistor Q1, the collector of the transistor Q1 connected in series to the second pin of the MUC, and a resistor R6 connected in series between the collector of the transistor Q1 and the first pin of the MCU; when the key switch S1 is pressed, the base electrode of the triode Q1 is changed into high level through the resistor R7, the collector electrode of the triode Q1 is conducted with the emitter electrode, the current reaches the ground through the resistor R6, the load is identified inside the main control chip U1 to be connected, the electric quantity indicator lamp is started, and the electric quantity indicator lamp is automatically turned off after a certain time without load.

6. The circuit of claim 5, wherein the transistor Q1 is of the type: s8050.

7. The circuit according to claim 4, wherein the transistor Q2 is of the type: SI 2300.