CN217545580U - Lithium battery mining protection circuit with transient suppression - Google Patents
Lithium battery mining protection circuit with transient suppression Download PDFInfo
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- CN217545580U CN217545580U CN202220975698.9U CN202220975698U CN217545580U CN 217545580 U CN217545580 U CN 217545580U CN 202220975698 U CN202220975698 U CN 202220975698U CN 217545580 U CN217545580 U CN 217545580U
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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Abstract
The utility model relates to a lithium cell technical field especially relates to a mining protection circuit of lithium cell with transient state restraines, include: a lithium battery pack and a protection circuit; the lithium battery pack 1 is formed by connecting n lithium batteries in series, wherein n is more than or equal to 1, and the lithium battery pack comprises a positive terminal and a negative terminal; the protection circuit 2 comprises a B + end, a B-end, a P + end, a P-end and at least one protection branch circuit, wherein the B + end is electrically connected with the positive end, the B-end is electrically connected with the negative end, the B + end is electrically connected with the P + end, and the protection branch circuits are respectively connected with the B + end, the B-end, the P + end and the P-end; the protection branch comprises a battery protection chip circuit 21 and an overcurrent detection circuit 22, and the battery protection chip circuit 21 is electrically connected with the overcurrent detection circuit 22. The utility model provides a mining protection circuit of lithium cell with transient state suppression satisfies the transient state energy requirement, guarantees output current output 2.3A, and the output performance of lithium cell is good, does not need artifical screening protection chip, has reduced the manual work volume, the cost is reduced.
Description
Technical Field
The utility model relates to a lithium cell technical field especially relates to a mining protection circuit of lithium cell with transient state restraines.
Background
With the development of scientific technology, the requirements for safe use of mining electrical equipment are higher and higher, most of the current portable mining equipment is powered by batteries, wherein lithium batteries are widely applied due to high voltage, small volume, light weight, high energy, no pollution, small self-discharge and long cycle life, but the safety problems of the lithium batteries are always concerned, the lithium batteries need to carry out safety treatment when used in the mining equipment, namely, the energy output of the lithium batteries is limited, the output of the lithium batteries has smaller internal resistance within the energy limit range, but the load is too small, and the output of the lithium batteries is cut off when the output of the lithium batteries exceeds the energy limit, so that the safety accidents under a coal mine caused by external sparks are avoided.
According to the requirement of the industry standard, after the lithium battery is processed by the intrinsic safety protection circuit, the output cut-off capacity after the circuit is broken is limited to 260uJ, when the battery outputs current of 2.3A, the output voltage of the battery is 8.4V, the output cut-off waveform is rectangular wave as shown in figure 1, the transient energy limit is met, and the calculated maximum cut-off time is 13.4us. And the output cut-off waveform is a triangle-like wave in actual use, as shown in fig. 2, the battery output current is 2.3A, the battery output voltage is 8.4V, the transient energy limit is satisfied by calculating with the output cut-off waveform as a rectangular wave, and the maximum cut-off time in actual use is estimated to be 25us. In actual use, the cut-off time is long, the energy output of the lithium battery cannot be limited in time, in order to meet the requirement of transient energy, the energy output of the lithium battery is limited in time, a protection chip with a fast response time is generally selected through screening, meanwhile, the protection current of the intrinsically safe protection circuit is reduced, the maximum output current of the lithium battery is smaller than 1.6A, the protection time is prolonged, the energy meets the 260uJ energy limitation, the intrinsic safe requirement is met, the response time of the protection chip is a range value, the protection chip protection response time is generally 50us-200us, the response time of each protection chip cannot be guaranteed to be fast, therefore, the protection chip with a fast response time needs to be screened manually, the labor is large, the chips with a slow response time are eliminated through screening, the cost is increased, in addition, the maximum output current of the battery is reduced, and the output performance of the lithium battery is influenced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: in order to solve the technical problem that the output performance of lithium cell this ampere of protection circuit manual work volume is big among the prior art, with high costs and lithium cell is poor, the utility model provides a mining protection circuit of lithium cell with transient state suppression satisfies the transient state energy requirement, guarantees output current output 2.3A, and the output performance of lithium cell is good, does not need artifical screening protection chip, has reduced the manual work volume, the cost is reduced.
The utility model provides a technical scheme that its technical problem adopted is: a lithium battery mining protection circuit with transient suppression, comprising: a lithium battery pack and a protection circuit; the lithium battery pack is formed by connecting n lithium batteries in series, wherein n is more than or equal to 1, and the lithium battery pack comprises a positive terminal and a negative terminal; the protection circuit comprises a B + end, a B-end, a P + end, a P-end and at least one protection branch circuit, wherein the B + end is electrically connected with the positive end, the B-end is electrically connected with the negative end, the B + end is electrically connected with the P + end, and the protection branch circuit is respectively connected with the B + end, the B-end, the P + end and the P-end; the protection branch circuit comprises a battery protection chip circuit and an overcurrent detection circuit, and the battery protection chip circuit is electrically connected with the overcurrent detection circuit.
Further, specifically, the lithium cell group is established ties by two lithium cells and is constituteed, and two lithium cells are first lithium cell and second lithium cell respectively, the negative pole of first lithium cell with the anodal of second lithium cell is connected, forms node D0 after connecting, node D0 does the common port of lithium cell group, the positive pole of first lithium cell does the positive terminal of lithium cell group, the negative pole of second lithium cell does the negative pole end of lithium cell group.
Further, specifically, the protection circuit further includes a BO + terminal, and the BO + terminal is electrically connected to the common terminal.
Further, specifically, the battery protection chip circuit of the protection branch includes: the protection circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, a protection chip and a field effect transistor, wherein one end of the first resistor is electrically connected with a B + end, the other end of the first resistor and one end of the first capacitor are electrically connected with 5 pins of the protection chip, the other end of the first capacitor is electrically connected with the B-end, one end of the second resistor is electrically connected with a BO + end, the other end of the second resistor and one end of the second capacitor are electrically connected with 4 pins of the protection chip, the other end of the second capacitor and one end of the fourth resistor are electrically connected with the B-end, 2 pins of the field effect transistor are electrically connected with 3 pins of the field effect transistor, the other end of the electrically connected node and the other end of the fourth resistor are electrically connected with 6 pins of the protection chip, 4 pins of the field effect transistor are electrically connected with 1 pin of the protection chip, 5 pins of the field effect transistor are electrically connected with 2 pins of the protection chip, 6 pins of the field effect transistor are electrically connected with 7 pins of the field effect transistor, and the other end of the second resistor is electrically connected with 3 pins of the protection chip.
Further, specifically, the overcurrent detection circuit of the protection branch circuit includes a third capacitor, a fifth resistor, a sixth resistor and a PNP type triode, one end of the third capacitor is electrically connected to pin 1 of the field effect transistor, the other end of the third capacitor is electrically connected to one end of the fifth resistor, one end of the fifth resistor and one end of the sixth resistor are both electrically connected to the base electrode of the PNP type triode, and the collector electrode of the PNP type triode is electrically connected to pin 4 of the field effect transistor.
Preferably, the other end of the sixth resistor and one end of the emitter of the PNP type triode are both electrically connected to the B-terminal.
Preferably, the other end of the sixth resistor and one end of the emitter of the PNP type triode are electrically connected to pin 2 of the fet.
Further, specifically, the type of the protection chip is an HY2120LB IC chip, and the field effect transistor is a double NMOS transistor.
Further, specifically, the protection circuit includes two protection branches, the two protection branches include a first protection branch and a second protection branch, and the first protection branch is electrically connected to the second protection branch.
The utility model has the advantages that: the utility model discloses a mining protection circuit of lithium cell with transient state suppression, when protection circuit is unusual, overcurrent detection circuit cuts off protection circuit prior to battery protection chip circuit in the protection branch road, improve response time, satisfy the restriction of transient state energy, guarantee that current output maximum current is greater than 2.3A, can not influence the output performance of lithium cell, in time, effectively avoid causing colliery down the security accident because of outside spark, overcurrent detection circuit only has the electric current to flow through when detecting protection circuit is unusual, protection circuit's static consumption keeps unchangeable, static consumption is 20uA, additionally, do not need artifical screening protection chip, the amount of labor has been reduced, the cost is reduced, and simple structure, the practicality is good.
Drawings
The present invention will be further described with reference to the accompanying drawings and examples.
FIG. 1 is a schematic diagram of the standard output cut-off waveform of the present invention
FIG. 2 is a schematic diagram of the actual output of the present invention
Fig. 3 is a schematic structural diagram of the preferred embodiment of the present invention.
Fig. 4 is a schematic structural diagram of the protection branch according to the preferred embodiment of the present invention.
Fig. 5 is a schematic diagram of the lithium battery according to the preferred embodiment of the present invention.
Fig. 6 is a circuit diagram of the preferred embodiment of the present invention.
Fig. 7 is a circuit diagram of another embodiment of the present invention.
In the figure, 1, a lithium battery pack; 2. a protection circuit; 21. a battery protection chip circuit; 22. an overcurrent detection circuit.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the components related to the present invention.
As shown in fig. 3-4, which are the preferred embodiments of the present invention, a protection circuit for lithium battery mine with transient suppression includes: a lithium battery pack 1 and a protection circuit 2; the lithium battery pack 1 is formed by connecting n lithium batteries in series, wherein n is more than or equal to 1, and the lithium battery pack 1 comprises a positive terminal and a negative terminal; the protection circuit 2 comprises a B + end, a B-end, a P + end, a P-end and at least one protection branch circuit, wherein the B + end is electrically connected with the positive end, the B-end is electrically connected with the negative end, the B + end is electrically connected with the P + end, and the protection branch circuits are respectively connected with the B + end, the B-end, the P + end and the P-end; the protection branch comprises a battery protection chip circuit 21 and an overcurrent detection circuit 22, and the battery protection chip circuit 21 is electrically connected with the overcurrent detection circuit 22. When the protection circuit is abnormal, the overcurrent detection circuit 22 in the protection branch circuit cuts off the protection circuit before the battery protection chip circuit 21, the response time is prolonged, the transient energy limitation is met, the maximum current of the current output is ensured to be larger than 2.3A, the output performance of the lithium battery cannot be influenced, timely, the underground safety accident of the coal mine caused by external sparks is effectively avoided, the overcurrent detection circuit only has the current flowing through when the protection circuit is detected to be abnormal, the static power consumption of the protection circuit is kept unchanged, the static power consumption is 20uA, in addition, manual screening of the protection chip is not needed, the labor amount is reduced, the cost is reduced, the structure is simple, and the practicability is good.
The embodiment of the utility model provides an in, as shown in fig. 5, lithium cell group 1 is established ties by two lithium cells and is constituteed, and two lithium cells are first lithium cell and the second lithium cell respectively, and the negative pole of first lithium cell is connected with the positive pole of the second lithium cell, forms node D0 after connecting, and node D0 is the common terminal of lithium cell group 1, and the positive pole of first lithium cell is the positive terminal of lithium cell group 1, and the negative pole of the second lithium cell is the negative terminal of lithium cell group 1.
In the embodiment of the present invention, the protection circuit 2 further includes a BO + terminal, and the BO + terminal is electrically connected to the public terminal.
The embodiment of the utility model provides an in, protection circuit 2 is two protection branch roads, and two protection branch roads are first protection branch road and second protection branch road respectively, and the electricity is connected between first protection branch road and the second protection branch road. When the first protection branch circuit is invalid, the second protection branch circuit still can play a battery protection function, and the battery protection device has higher stability and safety.
In the embodiment of the present invention, as shown in fig. 6 to 7, the battery protection chip circuit 21 of the first protection branch includes: the protection circuit comprises a resistor R1, a resistor R11, a resistor R3, a resistor R13, a capacitor C1, a capacitor C6, a protection chip U1 and a field effect transistor V1, wherein one end of the resistor R1 is electrically connected with a B + end, the other end of the resistor R1 and one end of the capacitor C1 are electrically connected with 5 pins of the protection chip U1, the other end of the capacitor C1 is electrically connected with the B-end, one end of the resistor R11 is electrically connected with a BO + end, the other end of the resistor R11 and one end of the capacitor C6 are electrically connected with 4 pins of the protection chip U1, the other end of the capacitor C6 and one end of the resistor R13 are electrically connected with the B-end, 2 pins of the field effect transistor V1 are electrically connected with 3 pins of the field effect transistor V1, the other end of the electrically connected node and the resistor R13 are electrically connected with 6 pins of the protection chip U1, 4 pins of the field effect transistor V1 are electrically connected with 1 pin of the protection chip U1, 5 pins of the field effect transistor V1 are electrically connected with 2 pins of the protection chip U1, 6 pins of the field effect transistor V1 are electrically connected with 7 pins of the field effect transistor V1, and the other end of the node D1 is electrically connected with the protection chip, and the node D1, and the other end of the protection chip is electrically connected with the node D1.
The embodiment of the utility model provides an in, overcurrent detection circuit 22 of first protection branch road includes electric capacity C3, resistance R5, resistance R7 and PNP type triode V3, electric capacity C3's one end is connected with field effect transistor V1's 1 foot electricity, electric capacity C3's the other end is connected with resistance R5's one end electricity, resistance R5's one end and resistance R7's one end all are connected with PNP type triode V3's base electricity, resistance R7's the other end and PNP type triode V3's projecting pole one end all are connected with the B-end electricity, PNP type triode V3's collecting electrode is connected with field effect transistor V1's 4 feet electricity.
The potential difference between the two ends of the resistor R13 is very small, the current flowing through the resistor R13 is small, in other words, the resistor R13 is equivalent to a connecting wire, therefore, in some embodiments of the present invention, the other end of the resistor R7 and one end of the emitter of the PNP type triode V3 can be further electrically connected to the 2-pin of the field effect transistor V1.
In the embodiment of the utility model provides an in, protection chip U1 is HY2120 LB's IC chip, and HY2120LB is used for 2 sections lithium cell protection IC chips, carries out overcharge, overdischarge and overcurrent protection to the lithium cell, and field effect transistor V1 is two NMOS pipes, and the model of two NMOS pipes is 8205A.
The working principle of the first protection branch is as follows:
the first protection branch circuit continuously detects the voltage of a first lithium battery between the 3 pins and the 4 pins of the connection protection chip U1, the voltage of a second lithium battery between the 4 pins and the 6 pins of the connection protection chip U1, and the voltage difference between the 3 pins and the 6 pins of the protection chip U1, so that the charging and discharging of the lithium battery pack are controlled. When the voltages of the first lithium battery and the second lithium battery are both above the over-discharge detection voltage and below the over-charge detection voltage, and the voltage of the pin 2 of the protection chip U1 is above the charge over-current detection voltage and below the discharge over-current detection voltage, the pin 1 and the pin 2 of the protection chip U1 are both at high levels, so that the field effect transistor V1 is turned on, and the lithium batteries can normally work. When the protection circuit is short-circuited or the load is small, and the protection circuit is overcurrent, the capacitor C3 of the overcurrent detection circuit 22 is under the over-discharge condition, and when the voltage drop between the resistor R13 and the conduction internal resistance of the field-effect tube V1 is greater than 0.6V, the capacitor C3 has current flowing, so that the PNP type triode V3 is conducted, the grid voltage of the field-effect tube V1 is cut off, and the field-effect tube V1 is instantly disconnected under the action of the PNP type triode V3.
The field effect transistor V1 is a double NMOS transistor and respectively controls a charging loop and a discharging loop, the pin 3 and the pin 4 of the U1 of the protection chip detect the voltage of a first lithium battery, the pin 4 and the pin 6 of the U1 of the protection chip detect the voltage of a second lithium battery, and when the over-discharge detection voltage or the over-charge detection voltage of the lithium batteries is too high, the protection chip U1 cuts off the corresponding loop by controlling the field effect transistor V1. Specifically, if the overdischarge detection voltage of the lithium battery is detected to be too low, a pin 1 of the protection chip U1 outputs a low level, and a discharging loop is cut off; if the charging detection voltage of the lithium battery is detected to be too high, the pin 2 of the protection chip U1 outputs low level, and a charging loop is cut off. The 3-pin detection of the protection chip U1 is used for detecting discharge overcurrent and charge overcurrent, and the detection of the discharge overcurrent is that the 3-pin detection voltage of the protection chip U1 is higher than a threshold value, the 1-pin output low level of the protection chip U1 cuts off a discharge loop, the detection of the charge overcurrent cuts off a charge loop by outputting the low level to the 2-pin of the protection chip U1.
In the embodiment of the utility model, because of the special protection chip U1 of lithium cell protection time is longer, and protection time generally is in 50us-200us, can not cut off the circuit fast, causes the colliery accident in the pit, for accelerating protection response time, when detecting heavy current discharge in the twinkling of an eye, the base instantaneous voltage of PNP type triode V3 is greater than 0.6V, PNP type triode V3 switches on in the twinkling of an eye, makes field effect transistor V1 correspond the discharge circuit of the gate voltage of discharge MOS pipe and ends fast. The PNP type triode V3 has a response speed higher than that of the battery protection chip circuit 21 to cut off a discharge loop, so that discharge transient suppression is realized. The utility model discloses need not filter protection chip in the example, and need not reduce output current, guarantee that current output maximum current is greater than 2.3A, can not influence the output performance of lithium cell, the bandwidth of PNP type triode is 100M, overflows and cuts off the guard time and be less than 10us, satisfies the transient state energy restriction, has improved the security of borehole operation.
In the embodiment of the present invention, the battery protection chip circuit 21 of the second protection branch includes: a resistor R2, a resistor R10, a resistor R4, a resistor R9, a capacitor C2, a capacitor C5, a protection chip U2 and a field effect tube V2, wherein one end of the resistor R2 is electrically connected with a B + end, the other end of the resistor R2 and one end of the capacitor C2 are both electrically connected with a pin 5 of the protection chip U2, the other end of the capacitor C2 is electrically connected with a B-end, one end of the resistor R10 is electrically connected with a BO + end, the other end of the resistor R10 and one end of the capacitor C5 are both electrically connected with a pin 4 of the protection chip U2, the other end of the capacitor C5 and a pin 6 of the protection chip U2 are both electrically connected with a B-end, a pin 2 of the field effect tube V2 is electrically connected with a pin 3 of the field effect tube V2, and the electrically connected node is electrically connected with one end of a resistor R9, one end of the R9 is also electrically connected with a node D1, the other end of the resistor R9 is electrically connected with a B-terminal, a pin 4 of a field effect tube V2 is electrically connected with a pin 1 of a protection chip U2, a pin 5 of the field effect tube V2 is electrically connected with a pin 2 of the protection chip U2, a pin 6 of the field effect tube V2 is electrically connected with a pin 7 of the field effect tube V1 to form a node D2 after the electrical connection, the node D2 is electrically connected with one end of a resistor R4, the node D2 is also electrically connected with a P-terminal, and the other end of the resistor R4 is electrically connected with a pin 3 of the protection chip U2.
The embodiment of the utility model provides an in, the second protects overcurrent detection circuit 22 of branch road includes electric capacity C4, resistance R6, resistance R8 and PNP type triode V4, electric capacity C4's one end is connected with field effect transistor V2's 1 foot electricity, electric capacity C4's the other end is connected with resistance R6's one end electricity, resistance R6's one end and resistance R8's one end all are connected with PNP type triode V4's base electricity, resistance R8's the other end and PNP type triode V4's projecting pole one end all are connected with field effect transistor V2's 2 feet electricity, or resistance R8's the other end and PNP type triode V4's projecting pole one end all are connected with B-end electricity, PNP type triode V4's collecting electrode is connected with field effect transistor V2's 4 feet electricity.
The selection of the electronic components in the second protection branch is the same as the selection of the electronic components in the first protection branch, and is not described herein again.
The embodiment of the utility model provides an in, the structure and the connection homorelation of first protection branch road and second protection branch road are the same, and the theory of operation of second protection branch road is the same with the work of first protection branch road, and here is not being repeated. The first protection branch circuit and the second protection branch circuit are connected through a resistor R9 in the second protection branch circuit, and the resistor R9 connects the first protection branch circuit B- (ground potential) to the second protection branch circuit only when the first protection branch circuit is abnormal, if the loop of the first protection branch circuit is cut off, and the protection state of the second protection branch circuit is recovered.
The utility model discloses a mining protection circuit of lithium cell with transient state suppression, in the protection branch road when protection circuit is unusual, overcurrent detection circuit 22 cuts off protection circuit prior to battery protection chip circuit 21, and PNP type triode bandwidth is 100M, and overcurrent cutoff protection time is less than 10us, improves response time, satisfies the restriction of transient state energy, guarantees that the maximum current of current output is greater than 2.3A, can not influence the output performance of lithium cell, in time, effectively avoids causing the colliery safety accident because of outside spark; a capacitor C3 and a capacitor C4 in the overcurrent detection circuit 22 have current flowing only when the protection circuit is abnormal, the static power consumption of the protection circuit is kept unchanged, and the static power consumption is 20uA; in addition, the protection chip does not need to be manually screened, the labor amount is reduced, the cost is reduced, the structure is simple, and the practicability is good.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (9)
1. A lithium battery mining protection circuit with transient suppression, comprising: the lithium battery pack (1) and the protection circuit (2);
the lithium battery pack (1) is formed by connecting n lithium batteries in series, wherein n is more than or equal to 1, and the lithium battery pack (1) comprises a positive terminal and a negative terminal;
the protection circuit (2) comprises a B + end, a B-end, a P + end, a P-end and at least one protection branch circuit, wherein the B + end is electrically connected with the positive end, the B-end is electrically connected with the negative end, the B + end is electrically connected with the P + end, and the protection branch circuit is respectively connected with the B + end, the B-end, the P + end and the P-end;
the protection branch circuit comprises a battery protection chip circuit (21) and an overcurrent detection circuit (22), wherein the battery protection chip circuit (21) is electrically connected with the overcurrent detection circuit (22).
2. The protection circuit for lithium battery mines with transient suppression according to claim 1, wherein the lithium battery set (1) is composed of two lithium batteries connected in series, the two lithium batteries are a first lithium battery and a second lithium battery respectively, a negative electrode of the first lithium battery is connected to a positive electrode of the second lithium battery to form a node D0, the node D0 is a common terminal of the lithium battery set (1), the positive electrode of the first lithium battery is a positive terminal of the lithium battery set (1), and the negative electrode of the second lithium battery is a negative terminal of the lithium battery set (1).
3. The lithium battery mining protection circuit with transient suppression as defined in claim 2, wherein said protection circuit (2) further comprises a BO + terminal, said BO + terminal being electrically connected to said common terminal.
4. The lithium battery mining protection circuit with transient suppression according to claim 3, characterized in that the battery protection chip circuit (21) of the protection branch comprises: the protection circuit comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first capacitor, a second capacitor, a protection chip and a field effect transistor, wherein one end of the first resistor is electrically connected with a B + end, the other end of the first resistor and one end of the first capacitor are electrically connected with 5 pins of the protection chip, the other end of the first capacitor is electrically connected with the B-end, one end of the second resistor is electrically connected with a BO + end, the other end of the second resistor and one end of the second capacitor are electrically connected with 4 pins of the protection chip, the other end of the second capacitor and one end of the fourth resistor are electrically connected with the B-end, 2 pins of the field effect transistor are electrically connected with 3 pins of the field effect transistor, the other end of the electrically connected node and the other end of the fourth resistor are electrically connected with 6 pins of the protection chip, 4 pins of the field effect transistor are electrically connected with 1 pin of the protection chip, 5 pins of the field effect transistor are electrically connected with 2 pins of the protection chip, 6 pins of the field effect transistor are electrically connected with 7 pins of the field effect transistor, and the other end of the second resistor is electrically connected with 3 pins of the protection chip.
5. The lithium battery mining protection circuit with transient suppression according to claim 4, wherein the over-current detection circuit (22) of the protection branch comprises a third capacitor, a fifth resistor, a sixth resistor and a PNP type triode, one end of the third capacitor is electrically connected with pin 1 of the field effect transistor, the other end of the third capacitor is electrically connected with one end of the fifth resistor, one end of the fifth resistor and one end of the sixth resistor are both electrically connected with the base of the PNP type triode, and the collector of the PNP type triode is electrically connected with pin 4 of the field effect transistor.
6. The mining lithium battery protection circuit with transient suppression of claim 5, wherein the other end of the sixth resistor and one end of the emitter of the PNP type triode are both electrically connected with a B-terminal.
7. The mining lithium battery protection circuit with transient suppression of claim 5, wherein the other end of the sixth resistor and one end of the PNP type triode emitter are electrically connected with the 2-pin of the field effect transistor.
8. The mining lithium battery protection circuit with transient suppression of claim 4, wherein the type of the protection chip is an HY2120LB IC chip, and the field effect transistor is a double NMOS transistor.
9. The lithium battery mining protection circuit with transient suppression according to claim 6 or 7, characterized in that the protection circuit (2) is two protection branches, wherein the two protection branches are a first protection branch and a second protection branch, and the first protection branch is electrically connected with the second protection branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220975698.9U CN217545580U (en) | 2022-04-26 | 2022-04-26 | Lithium battery mining protection circuit with transient suppression |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220975698.9U CN217545580U (en) | 2022-04-26 | 2022-04-26 | Lithium battery mining protection circuit with transient suppression |
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| Publication Number | Publication Date |
|---|---|
| CN217545580U true CN217545580U (en) | 2022-10-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202220975698.9U Active CN217545580U (en) | 2022-04-26 | 2022-04-26 | Lithium battery mining protection circuit with transient suppression |
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- 2022-04-26 CN CN202220975698.9U patent/CN217545580U/en active Active
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