CN217639446U - Lithium battery-oriented acquisition control device - Google Patents

Lithium battery-oriented acquisition control device Download PDF

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CN217639446U
CN217639446U CN202220598410.0U CN202220598410U CN217639446U CN 217639446 U CN217639446 U CN 217639446U CN 202220598410 U CN202220598410 U CN 202220598410U CN 217639446 U CN217639446 U CN 217639446U
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lithium battery
triode
voltage
module
control device
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姚维风
韦鑫鑫
王大炜
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Shenzhen Xinke Juhe Network Technology Co ltd
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Shenzhen Xinke Juhe Network Technology Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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Abstract

The utility model discloses a collection control device towards lithium cell, include: the sampling module is used for collecting the voltage of the lithium battery; the comparison module compares the voltage acquired by the sampling module with an overcharge threshold voltage and an overdischarge threshold voltage to judge whether the lithium battery reaches an overcharge state or an overdischarge state; the discharging module discharges the lithium battery when the lithium battery is in an overcharged state; the charging module is used for charging the lithium battery when the lithium battery is in an over-discharge state; the first protection module sends out early warning when the discharge time of the lithium battery exceeds the preset discharge time; and the second protection module is used for sending out early warning when the charging time of the lithium battery exceeds the preset charging time. The utility model provides a to the collection controlling means of lithium cell can discharge, charge the lithium cell of cross discharge state to the cross charge state, can also monitor the charge-discharge time of lithium cell, in case the lithium cell will send the early warning when long or long overlength when discharging when charging, warns the user lithium cell and probably has the trouble.

Description

Lithium battery-oriented acquisition control device
Technical Field
The utility model relates to a lithium cell technical field especially relates to a collection control device towards lithium cell.
Background
Because the lithium battery has the advantages of small volume, high energy density, no memory effect, long cycle life, high-voltage battery, low self-discharge rate and the like, in recent years, more and more products such as PDAs, digital cameras, mobile phones, portable audio devices, bluetooth devices and the like adopt the lithium battery as a main power supply.
However, in the actual use process, when the lithium battery is charged and discharged, the charging electric quantity is easy to control, the capacity loss caused by structural change of the anode material can be caused during overcharging, oxygen is decomposed and released to react with the electrolyte through violent oxidation so as to cause combustion and explosion, the performance of the lithium battery can be reduced during overdischarging, and the service life is shortened.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve the technical problem that the lithium cell among the above-mentioned prior art overcharged easily or put excessively, provide an acquisition control device towards lithium cell.
The utility model adopts the technical proposal that:
the utility model provides a collection control device towards lithium cell, include:
the sampling module is used for collecting the voltage of the lithium battery;
the comparison module is used for comparing the voltage acquired by the sampling module with an overcharge threshold voltage and an overdischarge threshold voltage and judging whether the lithium battery reaches an overcharge state or an overdischarge state;
the discharging module is connected with the comparing module and discharges the lithium battery when the lithium battery is in an overcharged state;
the charging module is connected with the comparison module and charges the lithium battery when the lithium battery is in an over-discharge state;
the first protection module is connected with the discharge module, and when the discharge time of the lithium battery exceeds a preset discharge time, the first protection module gives out early warning;
and the second protection module is connected with the charging module, and when the charging time of the lithium battery exceeds the preset charging time, the second protection module sends out early warning.
Furthermore, the first protection module comprises a first delay circuit and a first alarm circuit, the delay time of the first delay circuit is the preset discharge time, the discharge time of the lithium battery exceeds the preset discharge time, the first delay circuit is switched on, and the first alarm circuit is switched on.
Furthermore, the second protection module comprises a second delay circuit and a second alarm circuit, the delay time of the second delay circuit is the preset charging time, the charging time of the lithium battery exceeds the preset charging time, the second delay circuit is switched on, and the second alarm circuit is switched on.
In an embodiment, the sampling module includes an amplifier U1, and a non-inverting input terminal of the amplifier U1 is connected to the lithium battery.
In an embodiment, the comparing module includes a comparator U2 and a comparator U3, a non-inverting input terminal of the comparator U2 and an inverting input terminal of the comparator U3 are both connected to the output terminal of the amplifier U1, a reference voltage at the non-inverting input terminal of the comparator U2 is the overcharge threshold voltage, and a reference voltage at the non-inverting input terminal of the comparator U3 is the overdischarge threshold voltage.
In one embodiment, the discharge module includes: triode Q1, resistance R1, electric capacity C1, triode Q1's base is connected comparator U2's output, the lithium cell is connected to triode Q1's collecting electrode, triode Q1's projecting pole connecting resistance R1 connects electric capacity C1, electric capacity C1's other end ground connection.
In an embodiment, the first protection module includes the capacitor C1, a buzzer P1, a voltage regulator tube D1, and a triode Q2, a negative electrode of the voltage regulator tube D1 is connected between the resistor R1 and the capacitor C1, a positive electrode of the voltage regulator tube D1 is connected to a base of the triode Q2, a collector of the triode Q2 is connected to the buzzer P1, another end of the buzzer is connected to the power supply, and an emitter of the triode Q2 is grounded.
In an embodiment, the charging module comprises a triode Q3 and a power VCC, the base of the triode Q3 is connected with the output end of the comparator U3, the collector of the triode Q3 is connected with the power VCC, and the emitter of the triode Q3 is connected with the lithium battery.
In an embodiment, the second protection module includes a capacitor C2, a voltage regulator tube D2, and a buzzer P2, one end of the capacitor C2 is connected to the emitter of the triode Q3, the other end of the capacitor C2 is connected to the negative electrode of the voltage regulator tube D2, and the positive electrode of the voltage regulator tube D2 is connected to the buzzer P2.
Compared with the prior art, the utility model provides a to the collection control device of lithium cell can discharge, charge the lithium cell of cross discharge state to the cross charge state, can also monitor the charge-discharge time of lithium cell, in case the lithium cell will send the early warning when charging long or long overlength when discharging, warning user lithium cell probably has the trouble.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.
Fig. 1 is a schematic view of the overall structure of the lithium battery-oriented acquisition control device of the present invention;
fig. 2 is the circuit diagram of the collection control device for lithium battery in the embodiment of the present invention.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
In the description of the present invention, it is to be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and 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.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; 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.
Because lithium batteries have the advantages of small size, high energy density, no memory effect, long cycle life, high-voltage batteries, low self-discharge rate and the like, more and more products such as PDAs, digital cameras, mobile phones, portable audio devices, bluetooth devices and the like in recent years adopt lithium batteries as main power sources.
However, in the actual use process, the lithium battery also has some defects, for example, when the lithium battery is charged and discharged, the charging capacity is not easy to control, the capacity loss caused by the structural change of the anode material can be caused during overcharge, oxygen is decomposed and released, the anode material and the electrolyte are subjected to severe oxidation reaction and then are combusted and exploded, the performance of the lithium battery can be reduced during overdischarge, and the service life is shortened.
Therefore, in order to solve the problem that the lithium cell overcharged and overflowed the utility model provides a towards collection control device of lithium cell, as shown in fig. 1 including:
the sampling module is used for collecting the voltage of the lithium battery;
the comparison module compares the voltage acquired by the sampling module with the overcharge threshold voltage and the overdischarge threshold voltage; when the voltage acquired by the sampling module is greater than the overcharge threshold voltage, judging that the lithium battery is in an overcharge state; when the voltage acquired by the sampling module is smaller than the over-discharge threshold voltage, judging that the lithium battery is in an over-discharge state;
the discharging module is connected with the comparing module, and starts to work and discharge the lithium battery when the lithium battery is in an overcharged state;
the charging module is connected with the comparison module, and starts to work and charge the lithium battery when the lithium battery is in an over-discharge state;
the first protection module is arranged to be connected with the discharge module because the first protection module is considered that the lithium battery is possible to have faults if the lithium battery cannot reach the standard voltage after long-time discharge, the first protection module is provided with a preset discharge time in advance, and early warning is given out when the discharge time of the lithium battery exceeds the preset discharge time;
and the second protection module is used for indicating that the lithium battery possibly has faults if the lithium battery cannot reach the standard voltage after being charged for a long time, so that the second protection module is arranged to be connected with the charging module, the preset charging time is set in advance, and an early warning is sent out when the charging time of the lithium battery exceeds the preset charging time.
To sum up, the utility model provides a to collection control device of lithium cell can discharge, charge the lithium cell of cross discharge state to the cross charge state, can also monitor the charge-discharge time of lithium cell, in case the lithium cell will send the early warning when charging long or long overlength when discharging, warns user's lithium cell and probably has the trouble.
The principle of the lithium battery-oriented acquisition control device provided by the present invention is explained with reference to the following embodiments and fig. 2.
As shown in fig. 2, in this embodiment, the utility model provides a towards collection module among collection controlling means of lithium cell includes amplifier U1, and the lithium cell is connected to amplifier U1's non inverting input end, gathers the voltage of lithium cell, and the reference voltage Vref1 of amplifier U1's inverting input end sets up to the standard voltage of lithium cell, and this standard voltage is formulated according to the positive pole material of lithium cell, and for example positive pole material is LiCoO 2 The standard voltage of the lithium battery is 3.7V, and the anode material is Li 2 Mn 2 O 4 The standard voltage of the lithium battery of (1) is 4.0V.
Further, the comparison module comprises a comparator U2 and a comparator U3, the in-phase input end of the comparator U2 is connected with the inverted input end of the comparator U3 and then connected with the output end of the amplifier U1, the reference voltage Vref2 of the inverted input end of the comparator U2 is set to be a preset overcharge threshold voltage, the reference voltage Vref3 of the in-phase input end of the comparator U3 is set to be a preset overdischarge threshold voltage, the overcharge threshold voltage and the overdischarge threshold voltage are also selected according to the types of materials inside the lithium battery, the overcharge threshold voltage is greater than a standard voltage, the overdischarge threshold voltage is less than the standard voltage, the voltage between the overcharge threshold voltage and the overdischarge threshold voltage is a normal fluctuation range of the voltage of the lithium battery, and the standard voltage is also in the range but the performance of the lithium battery is optimal under the standard voltage.
Further, the discharging module comprises a triode Q1, a resistor R1 and a capacitor C1, the base of the triode Q1 is connected with the output end of the comparator U2, the collector of the triode Q1 is connected with the lithium battery, the emitter of the triode Q1 is sequentially connected with the resistor R1 and the capacitor C1, and the other end of the capacitor C1 is grounded. The module that charges includes triode Q3, power VCC, and comparator U3's output is connected to triode Q3's base, and the power VCC is connected to the collecting electrode of triode, and the lithium cell is connected to the projecting pole of triode.
Furthermore, the first protection module comprises a first delay circuit and a first alarm circuit, the delay time of the first delay circuit is preset discharge time, and when the discharge time of the lithium battery exceeds the preset discharge time, the first delay circuit is switched on and the first alarm circuit is switched on. Specifically, the first time delay circuit comprises a capacitor C1 and a voltage-regulator tube D1, the first alarm circuit comprises a triode Q2 and a buzzer P1, the negative electrode of the voltage-regulator tube D1 is connected between the capacitor C1 and a resistor R1, the positive electrode of the voltage-regulator tube D1 is connected with the base electrode of the triode Q2, the buzzer P1 is connected between a lithium battery and the collector electrode of the triode Q2, and the emitter electrode of the triode Q2 is grounded.
Similarly, the second protection module comprises a second delay circuit and a second alarm circuit, the delay time of the second delay circuit is preset charging time, when the charging time of the lithium battery exceeds the preset charging time, the second delay circuit is switched on, and the second alarm circuit is switched on. Specifically, the second delay circuit comprises a capacitor C2 and a voltage regulator tube D2, the second alarm circuit comprises a buzzer P2, one end of the capacitor C2 is connected with an emitting electrode of a triode Q3, the other end of the capacitor C2 is connected with a negative electrode of the voltage regulator tube D2, and a positive electrode of the voltage regulator tube D2 is connected with the buzzer P2.
The specific circuit is as described above, and the working principle of the lithium battery-oriented acquisition control device is as follows: if the voltage of the lithium battery collected by the amplifier U1 is greater than the standard voltage and greater than the preset overcharge threshold voltage, the comparator U2 outputs a high level, the comparator U3 outputs a low level, the triode Q1 is conducted, and the triode Q3 is cut off, so that the lithium battery discharges, the voltage between the capacitor C1 and the resistor R1 is continuously raised, the capacitor size of the capacitor C1 and the resistor R1 size can be set according to the discharge speed and the duration of the lithium battery, the time for the voltage of the capacitor C1 to be raised from zero to the breakdown voltage of the voltage stabilizing tube D1 is the preset discharge duration, when the discharge duration of the lithium battery reaches the preset discharge duration, the voltage between the capacitor C1 and the resistor R1 can be raised to the reverse breakdown voltage of the voltage stabilizing tube D1, at the moment, the voltage stabilizing tube D1 is conducted, the triode Q2 is conducted, the buzzer P1 makes a sound, and prompts a user that the discharge duration of the lithium battery is too long, and the lithium battery possibly has a fault, and the fault detection can be carried out on the lithium battery. If the lithium battery is normal, the discharging time of the lithium battery does not exceed the preset discharging time, once the voltage of the lithium battery is reduced to the standard voltage, the comparator U2 outputs a low level, the triode Q1 is cut off, and the lithium battery stops discharging. Similarly, if the voltage of lithium cell is less than standard voltage, comparator U2 output low level, comparator U3 output high level, triode Q3 switches on, the power VCC charges the lithium cell, and electric capacity C2's voltage increases gradually simultaneously, and electric capacity C2's electric capacity size also sets up according to the kind and the charging speed of lithium cell, electric capacity C2's voltage promotes to stabilivolt D2's breakdown voltage's time from zero for predetermineeing the length of time of charging, electric capacity C2's voltage increases to stabilivolt D2's breakdown voltage when the length of time of charging of lithium cell exceedes when predetermineeing the length of time of charging, then bee calling organ P2 makes a sound. If the lithium battery is normal, the charging time of the lithium battery is shorter than the preset charging time, and when the voltage of the lithium battery rises to the standard voltage, the comparator U3 outputs a low level, and the lithium battery stops charging.
To sum up, the utility model provides a to the collection controlling means of lithium cell can detect the overcharge state and the overdischarge state of lithium cell, can also carry out charge and discharge to the lithium cell, monitors the charge-discharge time of lithium cell simultaneously, in case the lithium cell will send the early warning when charging long or long overlength when discharging, warns user's lithium cell probably has the trouble.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and any modifications, equivalents, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of the present invention.

Claims (9)

1. Towards collection control device of lithium cell, its characterized in that includes:
the sampling module is used for collecting the voltage of the lithium battery;
the comparison module is used for comparing the voltage acquired by the sampling module with an overcharge threshold voltage and an overdischarge threshold voltage and judging whether the lithium battery reaches an overcharge state or an overdischarge state;
the discharging module is connected with the comparing module and discharges the lithium battery when the lithium battery is in an overcharged state;
the charging module is connected with the comparison module and charges the lithium battery when the lithium battery is in an over-discharge state;
the first protection module is connected with the discharge module, and when the discharge time of the lithium battery exceeds a preset discharge time, the first protection module gives out early warning;
and the second protection module is connected with the charging module, and when the charging time of the lithium battery exceeds the preset charging time, the second protection module sends out early warning.
2. The lithium battery-oriented acquisition control device as claimed in claim 1, wherein the first protection module comprises a first delay circuit and a first alarm circuit, the delay time duration of the first delay circuit is the preset discharge time duration, and when the discharge time of the lithium battery exceeds the preset discharge time duration, the first delay circuit is turned on and the first alarm circuit is turned on.
3. The lithium battery-oriented acquisition control device according to claim 1, wherein the second protection module comprises a second delay circuit and a second alarm circuit, the delay time of the second delay circuit is the preset charging time, and when the charging time of the lithium battery exceeds the preset charging time, the second delay circuit is turned on and the second alarm circuit is turned on.
4. The lithium battery-oriented acquisition control device as claimed in claim 1, wherein the sampling module comprises an amplifier U1, and a non-inverting input terminal of the amplifier U1 is connected to the lithium battery.
5. The lithium battery-oriented acquisition control device as claimed in claim 4, wherein the comparison module comprises a comparator U2 and a comparator U3, a non-inverting input terminal of the comparator U2 and an inverting input terminal of the comparator U3 are both connected to the output terminal of the amplifier U1, a reference voltage at the inverting input terminal of the comparator U2 is the overcharge threshold voltage, and a reference voltage at the non-inverting input terminal of the comparator U3 is the overdischarge threshold voltage.
6. The lithium battery-oriented acquisition control device as claimed in claim 5, wherein the discharge module comprises: triode Q1, resistance R1, electric capacity C1, triode Q1's base is connected comparator U2's output, the lithium cell is connected to triode Q1's collecting electrode, triode Q1's projecting pole connecting resistance R1 connects electric capacity C1, electric capacity C1's other end ground connection.
7. The lithium battery-oriented acquisition control device as claimed in claim 6, wherein the first protection module comprises the capacitor C1, a buzzer P1, a voltage regulator tube D1 and a triode Q2, wherein a negative electrode of the voltage regulator tube D1 is connected between the resistor R1 and the capacitor C1, a positive electrode of the voltage regulator tube D1 is connected with a base electrode of the triode Q2, a collector electrode of the triode Q2 is connected with the buzzer P1, the other end of the buzzer is connected with a power supply, and an emitter electrode of the triode Q2 is grounded.
8. The lithium battery-oriented acquisition control device as claimed in claim 5, wherein the charging module comprises a triode Q3 and a power supply VCC, the base of the triode Q3 is connected to the output terminal of the comparator U3, the collector of the triode Q3 is connected to the power supply VCC, and the emitter of the triode Q3 is connected to the lithium battery.
9. The lithium battery-oriented acquisition control device as claimed in claim 8, wherein the second protection module comprises a capacitor C2, a voltage regulator tube D2 and a buzzer P2, one end of the capacitor C2 is connected with the emitter of the triode Q3, the other end of the capacitor C2 is connected with the negative electrode of the voltage regulator tube D2, and the positive electrode of the voltage regulator tube D2 is connected with the buzzer P2.
CN202220598410.0U 2022-03-18 2022-03-18 Lithium battery-oriented acquisition control device Active CN217639446U (en)

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CN202220598410.0U CN217639446U (en) 2022-03-18 2022-03-18 Lithium battery-oriented acquisition control device

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Application Number Priority Date Filing Date Title
CN202220598410.0U CN217639446U (en) 2022-03-18 2022-03-18 Lithium battery-oriented acquisition control device

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CN217639446U true CN217639446U (en) 2022-10-21

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