CN216146109U - Novel peak voltage absorption circuit applied to single lithium battery management - Google Patents
Novel peak voltage absorption circuit applied to single lithium battery management Download PDFInfo
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- CN216146109U CN216146109U CN202121258715.9U CN202121258715U CN216146109U CN 216146109 U CN216146109 U CN 216146109U CN 202121258715 U CN202121258715 U CN 202121258715U CN 216146109 U CN216146109 U CN 216146109U
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Abstract
The utility model discloses a novel peak voltage absorption circuit applied to single lithium battery management, which relates to the technical field of lithium battery power protection and comprises a power protection voltage reduction circuit, a primary peak voltage absorption circuit, a rectification filter circuit, a temperature detection circuit, a lithium battery management circuit, a switch control circuit, a secondary peak voltage absorption circuit and a single lithium battery; the power supply protection voltage reduction circuit is used for reducing and protecting input voltage, the primary peak voltage absorption circuit and the secondary peak voltage absorption circuit are used for absorbing peak voltage, and the lithium battery management circuit is used for charging and discharging and detecting temperature of the lithium battery. The novel peak voltage absorption circuit applied to single-section lithium battery management adopts a two-stage peak voltage absorption circuit, well absorbs peak voltage, prevents damage to the circuit, detects the temperature of the lithium battery, prevents the phenomenon of overheating of the circuit caused by abnormal peak voltage absorption circuit, and greatly improves the safety and reliability of the circuit.
Description
Technical Field
The utility model relates to the technical field of lithium battery power supply protection, in particular to a novel peak voltage absorption circuit applied to single lithium battery management.
Background
Along with the development of science and technology, the functions of electric equipment are continuously increased, the performance is not improved, the charging and discharging management of single lithium batteries is continuously developed towards miniaturization and high efficiency, in order to reduce the volume and the quality of a lithium battery management circuit, the frequency of a charging switch can be improved, however, along with the improvement of the switching frequency, the loss of the switch is also increased, and simultaneously, the switching frequency is improved, so that at the moment of switching conversion, the energy charging and discharging of a reactance element causes a power device to bear great electric stress, the device is easy to damage and even burn out for a long time, most of the existing single lithium battery management circuits adopt expensive high voltage-resistant power switching tubes, the large-scale use cannot be realized, and the reliability of a power supply can be reduced, at present, most of the single lithium battery management circuits are provided with peak voltage absorption circuits at the input end of the power supply, resulting in incomplete absorption of the spike voltage or the occurrence of the spike voltage, resulting in a circuit failure.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a novel peak voltage absorption circuit applied to single lithium battery management, which aims to solve the problems in the background technology.
According to a first aspect of the embodiments of the present invention, there is provided a novel peak voltage absorbing circuit applied to single lithium battery management, the novel peak voltage absorbing circuit applied to single lithium battery management includes: the device comprises a power protection voltage reduction circuit, a primary peak voltage absorption circuit, a rectification filter circuit, a temperature detection circuit, a lithium battery management circuit, a switch control circuit, a secondary peak voltage absorption circuit and a single lithium battery;
the power protection voltage reduction circuit is used for reducing and protecting input voltage;
the primary peak voltage absorption circuit is used for absorbing the peak voltage generated by the power protection voltage reduction module;
the rectification filtering voltage stabilizing circuit is used for rectifying the voltage output by the power protection voltage reducing module into smooth direct current and outputting stable voltage;
the temperature detection circuit is used for detecting the temperature of the single lithium battery and outputting a temperature signal;
the lithium battery management circuit is used for controlling the charging of the lithium battery, receiving the temperature signal output by the temperature detection circuit and controlling the operation of the switch control module;
the switch control circuit is used for charging the single lithium battery;
the second-stage peak voltage absorption circuit is used for absorbing the peak voltage generated by the switch control circuit;
the single lithium battery is used for storing and providing electric energy.
Compared with the prior art, the utility model has the beneficial effects that: the novel peak voltage absorption circuit applied to the management of the single lithium battery adopts the two-stage peak voltage absorption circuit, so that the peak voltage can be well absorbed when a power supply provides voltage for the management of the lithium battery, the peak voltage can also be well absorbed when the power supply supplies power to the single lithium battery, the damage of the peak voltage to the circuit is prevented, the temperature detection is carried out on the lithium battery management circuit, the phenomenon that the circuit is overheated due to the abnormity of the peak voltage absorption circuit is prevented, and the safety and the reliability of the circuit are greatly improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments of the present invention 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 for those skilled in the art, other drawings are obtained according to the drawings without creative efforts.
Fig. 1 is a schematic block diagram illustrating a principle of a novel peak voltage absorption circuit applied to single lithium battery management according to an embodiment of the present invention.
Fig. 2 is a circuit diagram of a novel peak voltage absorption circuit applied to single lithium battery management according to an embodiment of the present invention.
Fig. 3 is a circuit diagram of another second-level spike voltage absorption circuit according to an embodiment of the present invention.
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.
Referring to fig. 1, an embodiment of the present invention provides a novel peak voltage absorbing circuit applied to management of a single lithium battery, where the novel peak voltage absorbing circuit applied to management of a single lithium battery includes: the device comprises a power protection voltage reduction circuit 1, a primary peak voltage absorption circuit 2, a rectification filtering voltage stabilizing circuit 3, a temperature detection circuit 4, a lithium battery management circuit 5, a switch control circuit 6, a secondary peak voltage absorption circuit 7 and a single lithium battery 8;
specifically, a power protection step-down circuit 1 for reducing and protecting an input voltage;
the primary peak voltage absorption circuit 2 is used for absorbing the peak voltage generated by the power protection voltage reduction module;
the rectification filtering voltage stabilizing circuit 3 is used for rectifying the voltage output by the power protection voltage reducing module into smooth direct current and outputting stable voltage;
the temperature detection circuit 4 is used for detecting the temperature of the single lithium battery 8 and outputting a temperature signal;
the lithium battery management circuit 5 is used for performing charging control on the single lithium battery 8, receiving the temperature signal output by the temperature detection circuit 4 and controlling the operation of the switch control module;
the switch control circuit 6 is used for charging the single lithium battery 8;
a secondary peak voltage absorption circuit 7 for absorbing the peak voltage generated by the switch control circuit 6;
and a single lithium battery 8 for storing and providing electric energy.
In a specific embodiment, the power protection step-down circuit 1 prevents the circuit from generating an overvoltage phenomenon through a protection element and reduces the voltage to provide electric energy for the circuit; the first-stage peak voltage absorption circuit 2 adopts an RC absorption circuit; the filtering in the rectification filtering voltage stabilizing circuit 3 can adopt an RC filter circuit or a pi-type filter circuit, and the voltage stabilization can adopt a corresponding voltage stabilizing chip or be automatically debugged through a voltage stabilizing triode; the lithium battery management circuit 5 adopts a related single lithium battery 8 manager to perform charging and discharging management on the single lithium battery 8, and can also control the single lithium battery 8 by using a singlechip drive switch; the switch control circuit 6 controls the charging and discharging through the lithium battery management circuit 5; the second-stage peak voltage absorption circuit 7 may adopt an RC absorption circuit or an RCD absorption circuit to absorb the peak voltage.
Example 2: on the basis of embodiment 1, please refer to fig. 2 and fig. 3, in an embodiment of the novel peak voltage absorption circuit applied to single lithium battery management according to the present invention, the power protection step-down circuit 1 includes a fuse F1, a voltage dependent resistor MOV and a transformer W1; the primary spike voltage absorption circuit 2 comprises a first resistor R1 and a first capacitor C1;
specifically, the primary winding of the transformer W1 is connected with the fuse F1 and the varistor MOV, the other end of the primary winding of the transformer W1 is connected with the other end of the varistor MOV, the secondary winding of the transformer W1 is connected with the first resistor R1, the other end of the secondary winding of the transformer W1 is connected with the first capacitor C1, and the other end of the first capacitor C1 is connected with the other end of the first resistor R1.
Further, the rectification, filtering and voltage stabilizing circuit 3 comprises a rectifier T, a second capacitor C2, a third capacitor C3, a fourth capacitor C4 and a voltage stabilizer U1;
specifically, the first end and the third end of the rectifier T are connected with the secondary winding of the transformer W1, the fourth end of the rectifier T is connected with the first end of the first capacitor C1, the second capacitor C2 and the first end of the voltage stabilizer U1, the second end of the rectifier T is connected with the ground end, the other end of the second capacitor C2, the other end of the third capacitor C3, the second end of the voltage stabilizer U1 and the fourth capacitor C4, and the third end of the voltage stabilizer U1 is connected with the other end of the fourth capacitor C4.
Further, the lithium battery management circuit 5 includes a first management chip U2, a second resistor R2, a third resistor R3, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a fourth resistor R4, a fifth resistor R5, a first inductor L1, a first indicator light LED1, and a second indicator light LED 2;
specifically, a first end of the first management chip U2 is connected to the third end of the regulator U1, the anode of the first indicator LED1, the anode of the second indicator LED2 and the fifteenth end of the first management chip U2 through a fifth capacitor C5, a cathode of the first indicator LED1 is connected to the fifth end of the first management chip U2 through a second resistor R2, the second indicator LED2 is connected to the fourth end of the first management chip U2 through a third resistor R3, a thirteenth end of the first management chip U2 is connected to the first inductor L1 and the fifth resistor R5, a fourteenth end of the first management chip U2 is connected to the other end of the fifth resistor R5, a ninth end of the first management chip U2 is grounded through a fourth resistor R4 and an eighth capacitor C8 in sequence, and an eleventh end of the first management chip U2 is connected to the sixth capacitor C6.
Further, the temperature detection circuit 4 includes a thermocouple NTC;
specifically, a first terminal of the thermocouple NTC is connected to the ground terminal, and a second terminal of the thermocouple NTC is connected to a sixth terminal of the first management chip U2.
Further, the switch control circuit 6 includes a first switch tube M1, a third diode D3, a first diode D1 and a second diode D2;
specifically, the gate of the first switching tube M1 is connected to the sixteenth end of the first management chip U2, the source of the first switching tube M1 is connected to the third end of the regulator U1, the anode of the third diode D3 and the ninth capacitor, the drain of the first switching tube M1 is connected to the anode of the first diode D1, the cathode of the third diode D3 and the other end of the ninth capacitor, and the cathode of the first diode D1 is grounded through the second diode D2.
Further, the second-stage spike voltage absorption circuit 7 includes a sixth resistor R6, a tenth capacitor C10 and a fourth diode D4;
specifically, a first end of the tenth capacitor C10 is connected to the source of the first switch tube M1 and the sixth resistor R6, a second end of the tenth capacitor C10 is connected to the other end of the sixth resistor R6 and the cathode of the fourth diode D4, and an anode of the fourth diode D4 is connected to the drain of the first switch tube M1.
Further, the secondary spike voltage absorption circuit 7 further comprises a twelfth capacitor C12 and a seventh resistor R7;
specifically, a first end of the twelfth capacitor C12 is connected to the source of the first switch transistor M1, and a second end of the twelfth capacitor C12 is connected to the drain of the first switch transistor M1 through the seventh resistor R7.
In a specific embodiment, the values of the first resistor R1 and the first capacitor C1 have no special precision requirement and no wiring requirement, and only the voltage withstanding requirements of the first resistor R1 and the first capacitor C1 and the heat dissipation requirement of the first resistor R1 need to be considered; the voltage stabilizer U1 can be a three-terminal integrated voltage stabilizer U17809 to provide stable +9V voltage for the circuit; the first management chip U2 can select a CN3705 single lithium battery 8 management chip, can perform trickle charge, single lithium battery 8 protection and automatic recharging functions on the single lithium battery 8, and can detect the temperature condition of the battery; the first switch tube M1 selects a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), and outputs a Pulse Width Modulation (PWM) signal to control the MOSFET to be turned on through the first management chip U2; the two-stage voltage absorbing circuit may adopt an RCD peak voltage absorbing circuit formed by a sixth resistor R6, a tenth capacitor C10 and a fourth diode D4, or adopt an RC peak voltage absorbing circuit formed by a twelfth capacitor C12 and a seventh resistor R7, when the first switching tube M1 is turned off, the switching voltage is clamped by the fourth diode D4, and when the first switching tube M1 is turned on, the tenth capacitor C10 discharges through the sixth resistor R6; the thermocouple NTC can select a 6-4 ring NTC temperature sensor to detect the temperature of the single lithium battery 8.
In the embodiment of the utility model, the power input circuit is used for carrying out voltage clamping when the voltage dependent resistor MOV bears overvoltage in the circuit, absorbing redundant current to protect sensitive devices, absorbing surge current well when the power is input, preventing the influence of instantaneous large current on the circuit, then reducing the voltage through the transformer W1, absorbing peak voltage through the first-stage peak voltage absorbing circuit 2 consisting of the first resistor R1 and the first capacitor C1, preventing the influence of the peak voltage input by the power when the circuit is switched on, outputting smooth direct current stabilized voltage through the rectifier T, the filter capacitor and the voltage stabilizer U1, charging and protecting the single lithium battery 8 through the first management chip U2, absorbing the peak voltage generated at the moment of switching on and switching off of the first switch through the RCD or RC peak voltage absorbing circuit at the first switch controlled by the first management chip U2, the influence of peak voltage on the single lithium battery 8 is avoided, wherein the fourteenth end of the first management chip U2 detects the voltage of the single lithium battery 8 to control the closing of the first switch tube M1, the thermocouple NTC connected with the sixth end detects the temperature of the lithium battery, the fourth end displays charging, and the fifth end displays the end of charging.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (8)
1. The utility model provides a be applied to novel peak voltage absorption circuit of single section lithium cell management which characterized in that:
this be applied to novel peak voltage absorption circuit of single section lithium cell management includes: the device comprises a power protection voltage reduction circuit, a primary peak voltage absorption circuit, a rectification filter circuit, a temperature detection circuit, a lithium battery management circuit, a switch control circuit, a secondary peak voltage absorption circuit and a single lithium battery;
the power protection voltage reduction circuit is used for reducing and protecting input voltage;
the primary peak voltage absorption circuit is used for absorbing the peak voltage generated by the power protection voltage reduction module;
the rectification filtering voltage stabilizing circuit is used for rectifying the voltage output by the power protection voltage reducing module into smooth direct current and outputting stable voltage;
the temperature detection circuit is used for detecting the temperature of the single lithium battery and outputting a temperature signal;
the lithium battery management circuit is used for controlling the charging of the lithium battery, receiving the temperature signal output by the temperature detection circuit and controlling the operation of the switch control module;
the switch control circuit is used for charging the single lithium battery;
the second-stage peak voltage absorption circuit is used for absorbing the peak voltage generated by the switch control circuit;
the single lithium battery is used for storing and providing electric energy.
2. The novel peak voltage absorption circuit applied to the management of the single lithium battery as claimed in claim 1, wherein the power protection step-down circuit comprises a fuse, a voltage dependent resistor and a transformer; the primary peak voltage absorption circuit comprises a first resistor and a first capacitor;
the primary winding of the transformer is connected with the fuse and the piezoresistor, the other end of the primary winding of the transformer is connected with the other end of the piezoresistor, the secondary winding of the transformer is connected with the first resistor, the other end of the secondary winding of the transformer is connected with the first capacitor, and the other end of the first capacitor is connected with the other end of the first resistor.
3. The novel peak voltage absorption circuit applied to single lithium battery management as claimed in claim 2, wherein the rectification, filtering and voltage stabilization circuit comprises a rectifier, a second capacitor, a third capacitor, a fourth capacitor and a voltage stabilizer;
the first end and the third end of the rectifier are connected with a secondary winding of the transformer, the fourth end of the rectifier is connected with the first end of the first capacitor, the second capacitor and the first end of the voltage stabilizer, the second end of the rectifier is connected with the ground end, the other end of the second capacitor, the other end of the third capacitor, the second end of the voltage stabilizer and the fourth capacitor, and the third end of the voltage stabilizer is connected with the other end of the fourth capacitor.
4. The novel peak voltage absorption circuit applied to single lithium battery management is characterized in that the lithium battery management circuit comprises a first management chip, a second resistor, a third resistor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, a fourth resistor, a fifth resistor, a first inductor, a first indicator light and a second indicator light;
the first end of the first management chip is connected with the third end of the voltage stabilizer, the anode of the first indicator lamp, the anode of the second indicator lamp and the fifteenth end of the first management chip through a fifth capacitor, the cathode of the first indicator lamp is connected with the fifth end of the first management chip through a second resistor, the second indicator lamp is connected with the fourth end of the first management chip through a third resistor, the thirteenth end of the first management chip is connected with the first inductor and the fifth resistor, the fourteenth end of the first management chip is connected with the other end of the fifth resistor, the ninth end of the first management chip is grounded through the fourth resistor and the eighth capacitor in sequence, and the eleventh end of the first management chip is connected with the sixth capacitor.
5. The novel peak voltage absorption circuit applied to the management of the single lithium battery as claimed in claim 4, wherein the temperature detection circuit comprises a thermocouple;
the first end of the thermocouple is connected with the ground end, and the second end of the thermocouple is connected with the sixth end of the first management chip.
6. The novel peak voltage absorption circuit applied to single lithium battery management as claimed in claim 5, wherein the switch control circuit comprises a first switch tube, a third diode, a first diode and a second diode;
the grid electrode of the first switch tube is connected with the sixteenth end of the first management chip, the source electrode of the first switch tube is connected with the third end of the voltage stabilizer, the anode of the third diode and the ninth capacitor, the drain electrode of the first switch tube is connected with the anode of the first diode, the cathode of the third diode and the other end of the ninth capacitor, and the cathode of the first diode is grounded through the second diode.
7. The novel peak voltage absorption circuit applied to single lithium battery management according to claim 6, wherein the secondary peak voltage absorption circuit comprises a sixth resistor, a tenth capacitor and a fourth diode;
the first end of the tenth capacitor is connected with the source electrode of the first switch tube and the sixth resistor, the second end of the tenth capacitor is connected with the other end of the sixth resistor and the cathode of the fourth diode, and the anode of the fourth diode is connected with the drain electrode of the first switch tube.
8. The novel peak voltage absorption circuit applied to single lithium battery management as claimed in claim 6, wherein the secondary peak voltage absorption circuit further comprises a twelfth capacitor and a seventh resistor;
and a first end of the twelfth capacitor is connected with the source electrode of the first switch tube, and a second end of the twelfth capacitor is connected with the drain electrode of the first switch tube through a seventh resistor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121258715.9U CN216146109U (en) | 2021-06-07 | 2021-06-07 | Novel peak voltage absorption circuit applied to single lithium battery management |
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| CN202121258715.9U CN216146109U (en) | 2021-06-07 | 2021-06-07 | Novel peak voltage absorption circuit applied to single lithium battery management |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116799767A (en) * | 2022-04-24 | 2023-09-22 | 固赢科技(深圳)有限公司 | Arc suppression and sampling conditioning circuit, control method thereof and film plating power supply |
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2021
- 2021-06-07 CN CN202121258715.9U patent/CN216146109U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116799767A (en) * | 2022-04-24 | 2023-09-22 | 固赢科技(深圳)有限公司 | Arc suppression and sampling conditioning circuit, control method thereof and film plating power supply |
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