CN214623051U - GPS module interface circuit - Google Patents

GPS module interface circuit Download PDF

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CN214623051U
CN214623051U CN202120698981.7U CN202120698981U CN214623051U CN 214623051 U CN214623051 U CN 214623051U CN 202120698981 U CN202120698981 U CN 202120698981U CN 214623051 U CN214623051 U CN 214623051U
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module
resistor
voltage
gps
pole
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蒋敏
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Huizhou Baimingcheng Electronic Co ltd
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Huizhou Baimingcheng Electronic 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
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    • Y02E60/10—Energy storage using batteries

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Abstract

The utility model relates to the technical field of electronic circuits, in particular to a GPS module interface circuit, which is applied to a battery management system and comprises a voltage reduction and stabilization module, a voltage detection module, a low-voltage protection module, a short-circuit protection module and a GPS interface module; the voltage reduction and stabilization module is connected with the voltage detection module, the voltage detection module is connected with the low-voltage protection module, the low-voltage protection module is connected with the short-circuit protection module, and the short-circuit protection module is connected with the GPS interface module; the voltage reduction and stabilization module and the low-voltage protection module are respectively connected with the battery management system; the utility model provides a GPS module interface circuit, when detecting that the battery voltage in the battery management system is too low, the active output turns off the signal, stops the power supply of GPS interface module, reaches the effect of low-voltage protection; and through setting up short-circuit protection module, when GPS interface module broke down, short-circuit protection module initiative cut off accuse electric return circuit, reached the purpose of protection battery, improved the yields and the security of product.

Description

GPS module interface circuit
Technical Field
The utility model relates to an electronic circuit technical field especially relates to a GPS module interface circuit.
Background
The current shared rental battery system is visible everywhere, and a GPS interface module is integrated in the battery system and is matched and shared with a battery management system, so that the functions of real-time positioning, remote startup and shutdown and the like of a product can be realized.
However, in practical applications, it is found that in products on the market, the same problems exist in interface circuits in which the internal battery management system is connected to the GPS interface module, for example, when the battery voltage is too low, the normal use of the products is affected, when the GPS interface module has a short-circuit fault or the like, the battery management system is burned out, and a large potential safety hazard exists, which results in a high product reject ratio, low safety, high after-sale cost, and the like.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems of high product reject ratio, low safety, high after-sale cost and the like, the utility model provides a GPS module interface circuit, which actively outputs a turn-off signal when detecting that the battery voltage in a battery management system is too low, stops the power supply of the GPS interface module and achieves the effect of low-voltage protection; and through setting up short-circuit protection module, when GPS interface module broke down, short-circuit protection module initiative cut off accuse electric return circuit, reached the purpose of protection battery, improved the yields and the security of product.
In order to solve the technical problem, the utility model provides a concrete scheme as follows:
a GPS module interface circuit is applied to a battery management system and comprises a voltage reduction and stabilization module, a voltage detection module, a low-voltage protection module, a short-circuit protection module and a GPS interface module;
the voltage reduction and stabilization module is connected with the voltage detection module, the voltage detection module is connected with the low-voltage protection module, the low-voltage protection module is connected with the short-circuit protection module, and the short-circuit protection module is connected with the GPS interface module;
and the voltage reduction and stabilization module and the low-voltage protection module are respectively connected with the battery management system.
Optionally, the GPS interface module includes an MCU control unit, and the MCU control unit is connected to a first switch unit and a GPS interface;
the GPS interface is connected with the short-circuit protection module, the first switch unit is matched with the MUC control unit to realize the GPS positioning function, and when the GPS interface module generates overcurrent and short circuit, the short-circuit protection module actively cuts off the electricity control loop to achieve the function of protecting the battery management system.
Optionally, the first switching unit includes a first MOS transistor, a first resistor, a second resistor, and a first zener diode;
the D pole of the first MOS tube is connected with the MCU control unit, the S pole of the first MOS tube is grounded, and the G pole of the first MOS tube is connected with the first resistor, the second resistor and the first voltage stabilizing diode;
the other end of the first resistor and the other end of the first voltage stabilizing diode are both grounded, the other end of the second resistor is connected with the GPS interface, the first resistor and the second resistor play a role in current-limiting driving of the first MOS tube, and the first voltage stabilizing diode has a voltage stabilizing effect and plays a role in protecting the first MOS tube.
Optionally, a third resistor is arranged between the MCU control unit and the GPS interface, and the third resistor plays a role in controlling the GPS signal current limiting.
Optionally, an NC resistor is further disposed between the GPS interface module and the short-circuit protection module, and is used for matching with the first resistor, the second resistor, and the first MOS transistor, so that under the condition that parameters of the NC resistor are different, one port of the GPS interface can be multipurpose, GPS connections such as a high level, a low level, and a high resistance state are respectively supported, and product generalization is achieved.
Optionally, the voltage reducing and stabilizing module includes a first triode, a fourth resistor is connected to a C pole of the first triode, a voltage detecting module is connected to an E pole of the first triode, and a fifth resistor, a sixth resistor, a second voltage stabilizing diode and a first capacitor are connected to a B pole of the first triode;
the other end of the fourth resistor and the other end of the fifth resistor are both connected with a battery management system, the other end of the sixth resistor is connected with a first diode, and the other end of the first diode, the other end of the second voltage stabilizing diode and the other end of the first capacitor are all grounded; the fifth resistor and the sixth resistor divide voltage provided by the battery management system, the fourth resistor drives the first triode, the first triode is conducted, and the voltage detection module detects the voltage.
Optionally, a filtering unit is disposed between the E pole of the first triode and the voltage detection module;
the filter unit comprises a seventh resistor and a second capacitor, one end of the seventh resistor is connected with the E pole of the first triode, the other end of the seventh resistor is connected with the second capacitor and the voltage detection module, and the other end of the second capacitor is grounded, so that the noise immunity of the product is improved.
Optionally, the low-voltage protection module includes a second triode and a second MOS transistor connected to the second triode;
the B pole of the second triode is connected with an eighth resistor and a ninth resistor, the other end of the eighth resistor is connected with the voltage detection module, the other end of the ninth resistor is grounded, the E pole of the second triode is grounded, and the C pole of the second triode is connected with a second MOS (metal oxide semiconductor) tube;
be provided with the tenth resistance between the G utmost point of second MOS pipe and the S utmost point, the both ends of tenth resistance are parallelly connected to have a third zener diode, the G utmost point of second MOS pipe is connected with eleventh resistance, the second triode is connected to the other end of eleventh resistance, the short-circuit protection module is connected to the D utmost point of second MOS pipe, when voltage detection module detects voltage and crosses lowly, exports low level, makes the second triode close, and the second MOS pipe ends, plays low pressure protection effect to GPS interface module.
Optionally, the short-circuit protection module includes a PTC thermistor, and when the GPS interface module fails, the PTC thermistor actively cuts off the power control loop, thereby achieving a function of protecting the battery management system.
Optionally, the voltage detection module includes a voltage detection chip for detecting the voltage.
Compared with the prior art, the beneficial effects of the utility model reside in that: the utility model provides a GPS module interface circuit, when detecting that the battery voltage in the battery management system is too low, the active output turns off the signal, stops the power supply of GPS interface module, reaches the effect of low-voltage protection; and through setting up short-circuit protection module, when GPS interface module broke down, short-circuit protection module initiative cut off accuse electric return circuit, reached the purpose of protection battery, improved the yields and the security of product.
Drawings
Fig. 1 is a schematic connection diagram of a GPS module interface circuit provided in an embodiment of the present invention.
Detailed Description
In order to explain the technical solution of the present invention in detail, the following will combine the drawings of the embodiments of the present invention to perform clear and complete description on the technical solution of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be obtained by a person skilled in the art without any inventive work based on the described embodiments of the present invention, belong to the protection scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
For example, a GPS module interface circuit is applied to a battery management system, and includes a voltage reduction and stabilization module, a voltage detection module, a low-voltage protection module, a short-circuit protection module, and a GPS interface module; the voltage reduction and stabilization module is connected with the voltage detection module, the voltage detection module is connected with the low-voltage protection module, the low-voltage protection module is connected with the short-circuit protection module, and the short-circuit protection module is connected with the GPS interface module; and the voltage reduction and stabilization module and the low-voltage protection module are respectively connected with the battery management system.
According to the GPS module interface circuit provided by the embodiment, when the battery voltage in the battery management system is detected to be too low, the GPS module interface circuit actively outputs a turn-off signal to stop power supply of the GPS interface module, so that the low-voltage protection effect is achieved; and through setting up short-circuit protection module, when GPS interface module broke down, short-circuit protection module initiative cut off accuse electric return circuit, reached the purpose of protection battery, improved the yields and the security of product.
As shown in fig. 1, a GPS module interface circuit is applied to a battery management system, and includes a voltage reduction and stabilization module, a voltage detection module, a low voltage protection module, a short circuit protection module, and a GPS interface module.
The voltage reduction and stabilization module is used for reducing the voltage to be within the detection range of the voltage detection module and has a voltage stabilization function; the voltage detection module is used for detecting the voltage and outputting a low level when the voltage is lower than a set threshold; the low-voltage protection module is connected or disconnected according to the level signal output by the voltage detection module so as to realize the low-voltage protection effect on the GPS interface module; the short-circuit protection module is used for actively cutting off the electricity control loop when the GPS interface module generates overcurrent and short circuit so as to achieve the function of protecting the battery management system; and the GPS interface module is used for being connected with an external GPS module to realize the positioning function of the product.
Specifically, the voltage reduction and stabilization module is connected with the voltage detection module, the voltage detection module is connected with the low-voltage protection module, the low-voltage protection module is connected with the short-circuit protection module, and the short-circuit protection module is connected with the GPS interface module; the voltage reduction and stabilization module and the low-voltage protection module are respectively connected with the battery management system.
Firstly, the voltage output by the battery management system is reduced to the detection range of the voltage detection module through the voltage reduction and stabilization module, when the voltage detection module detects that the voltage is lower than a set threshold value, a low level is output, the low-voltage protection module is turned off, and the external GPS module cannot be communicated with the GPS module interface circuit, so that the low-voltage protection effect is achieved.
When the voltage detection module outputs a high level, the low-voltage protection module is communicated, and the external GPS module is communicated with the GPS module interface circuit.
When the GPS interface module generates overcurrent and short circuit, the short circuit protection module actively cuts off the electricity control loop to achieve the function of protecting the battery management system.
In some embodiments, the GPS interface module includes an MCU control unit, the MCU control unit is connected to the first switch unit and the GPS interface; the GPS interface is connected with the short-circuit protection module, the first switch unit is matched with the MUC control unit to realize the GPS positioning function, and when the GPS interface module generates overcurrent and short circuit, the short-circuit protection module actively cuts off the electricity control loop to achieve the function of protecting the battery management system.
The first switch unit comprises a first MOS tube, a first resistor, a second resistor and a first voltage stabilizing diode. Referring to fig. 1, the first MOS transistor is Q35, the first resistor is R127, the second resistor is R97, and the first zener diode is ZD 17.
The D pole of the first MOS transistor Q35 is connected with the MCU control unit, the S pole of the first MOS transistor Q35 is grounded, and the G pole of the first MOS transistor Q35 is connected with a first resistor R127, a second resistor R97 and a first voltage-stabilizing diode ZD 17; the other end of the first resistor R127 and the other end of the first zener diode ZD17 are both grounded, and the other end of the second resistor R97 is connected with the GPS interface.
The first resistor R127 and the second resistor R97 play a role in current-limiting driving of the first MOS transistor Q35, and the first zener diode ZD17 has a voltage-stabilizing function and plays a role in protecting the first MOS transistor Q35.
In some embodiments, a third resistor is disposed between the MCU control unit and the GPS interface, and referring to fig. 1, the third resistor is R14, and the third resistor R14 plays a role in controlling the GPS signal current limiting.
Specifically, an NC resistor is further arranged between the GPS interface module and the short-circuit protection module, the NC resistor is R115 and is used for being matched with the first resistor R127, the second resistor R97 and the first MOS transistor Q35, and under the condition that the parameters of the NC resistor R115 are different, one port of the GPS interface can be multipurpose, the connection of the GPS in a high level state, a low level state, a high resistance state and the like is supported, and the generalization of the product is achieved.
In some embodiments, the buck regulator module includes a first transistor Q43, a fourth resistor is connected to a C-pole of the first transistor Q43, the fourth resistor is R118, an E-pole of the first transistor Q43 is connected to the voltage detection module, a fifth resistor, a sixth resistor, a second zener diode, and a first capacitor are connected to a B-pole of the first transistor Q43, wherein the fifth resistor is R117, the sixth resistor is R116, the second zener diode is ZD1, and the first capacitor is C7.
The other end of the fourth resistor R118 and the other end of the fifth resistor R117 are both connected with the battery management system, the other end of the sixth resistor R116 is connected with a first diode D10, and the other end of the first diode D10, the other end of the second zener diode ZD1 and the other end of the first capacitor C7 are all grounded; the fifth resistor R117 and the sixth resistor R116 divide the voltage provided by the battery management system, and the fourth resistor R118 drives the first transistor Q43, so that the first transistor Q43 is turned on, and the voltage detection module detects the voltage.
In some embodiments, a filtering unit is disposed between the E-pole of the first transistor Q43 and the voltage detection module, and the filtering unit includes a seventh resistor and a second capacitor, where the seventh resistor is R119 and the second capacitor is C8.
One end of the seventh resistor R119 is connected with the E pole of the first triode Q43, the other end of the seventh resistor R119 is connected with the second capacitor C8 and the voltage detection module, and the other end of the second capacitor C8 is grounded, so that the noise immunity of the product is improved.
In some embodiments, the low voltage protection module includes a second transistor and a second MOS transistor connected to the second transistor, where the second transistor is Q33, and the second MOS transistor is Q38.
The B pole of the second triode Q33 is connected with an eighth resistor and a ninth resistor, the eighth resistor is R139, the ninth resistor is R138, the other end of the eighth resistor R139 is connected with the voltage detection module, the other end of the ninth resistor R138 is grounded, the E pole of the second triode Q33 is grounded, and the C pole of the second triode Q33 is connected with the second MOS tube Q38.
The tenth resistor is arranged between the G pole and the S pole of the second MOS transistor Q38, the tenth resistor is R141, the third voltage stabilizing diode is connected in parallel at two ends of the tenth resistor R141, the third voltage stabilizing diode is ZD18, the G pole of the second MOS transistor Q38 is connected with the eleventh resistor, the eleventh resistor is R140, the other end of the eleventh resistor R140 is connected with the second triode Q33, the D pole of the second MOS transistor Q38 is connected with the short-circuit protection module, when the voltage detection module detects that the voltage is too low, the low level is output, the second triode Q33 is closed, the second MOS transistor Q38 is cut off, and the low-voltage protection effect is achieved on the GPS interface module.
In some embodiments, the short-circuit protection module includes a PTC thermistor, and when the GPS interface module fails, the PTC thermistor actively cuts off the power control loop to protect the battery management system.
The voltage detection module comprises a voltage detection chip for detecting voltage.
The utility model provides a GPS module interface circuit, when detecting that the battery voltage in the battery management system is too low, the active output turns off the signal, stops the power supply of GPS interface module, reaches the effect of low-voltage protection; and through setting up short-circuit protection module, when GPS interface module broke down, short-circuit protection module initiative cut off accuse electric return circuit, reached the purpose of protection battery, improved the yields and the security of product.
It is understood that different embodiments among the components in the above embodiments can be combined and implemented, and the embodiments are only for illustrating the implementation of specific structures and are not limited to the implementation of the embodiments.
The embodiments of the present invention have been described in detail with reference to the drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (10)

1. The GPS module interface circuit is characterized by being applied to a battery management system and comprising a voltage reduction and stabilization module, a voltage detection module, a low-voltage protection module, a short-circuit protection module and a GPS interface module;
the voltage reduction and stabilization module is connected with the voltage detection module, the voltage detection module is connected with the low-voltage protection module, the low-voltage protection module is connected with the short-circuit protection module, and the short-circuit protection module is connected with the GPS interface module;
and the voltage reduction and stabilization module and the low-voltage protection module are respectively connected with the battery management system.
2. The GPS module interface circuit according to claim 1, wherein the GPS interface module comprises an MCU control unit, the MCU control unit is connected with a first switch unit and a GPS interface;
the GPS interface is connected with the short-circuit protection module.
3. The GPS module interface circuit according to claim 2, wherein the first switching unit includes a first MOS transistor, a first resistor, a second resistor, and a first zener diode;
the D pole of the first MOS tube is connected with the MCU control unit, the S pole of the first MOS tube is grounded, and the G pole of the first MOS tube is connected with the first resistor, the second resistor and the first voltage stabilizing diode;
the other end of the first resistor and the other end of the first voltage stabilizing diode are both grounded, and the other end of the second resistor is connected with the GPS interface.
4. The GPS module interface circuit according to claim 2, wherein a third resistor is provided between the MCU control unit and the GPS interface.
5. The GPS module interface circuit according to claim 2, wherein an NC resistor is further provided between the GPS interface module and the short-circuit protection module.
6. The GPS module interface circuit according to claim 1, wherein the buck regulator module comprises a first triode, a fourth resistor is connected to a C pole of the first triode, a voltage detection module is connected to an E pole of the first triode, and a fifth resistor, a sixth resistor, a second zener diode and a first capacitor are connected to a B pole of the first triode;
the other end of the fourth resistor and the other end of the fifth resistor are both connected with a battery management system, the other end of the sixth resistor is connected with a first diode, and the other end of the first diode, the other end of the second voltage stabilizing diode and the other end of the first capacitor are all grounded.
7. The GPS module interface circuit of claim 6, wherein a filter unit is disposed between the E pole of the first triode and the voltage detection module;
the filter unit comprises a seventh resistor and a second capacitor, one end of the seventh resistor is connected with the E pole of the first triode, the other end of the seventh resistor is connected with the second capacitor and the voltage detection module, and the other end of the second capacitor is grounded.
8. The GPS module interface circuit of claim 1, wherein the low voltage protection module comprises a second transistor and a second MOS transistor connected to the second transistor;
the B pole of the second triode is connected with an eighth resistor and a ninth resistor, the other end of the eighth resistor is connected with the voltage detection module, the other end of the ninth resistor is grounded, the E pole of the second triode is grounded, and the C pole of the second triode is connected with a second MOS (metal oxide semiconductor) tube;
a tenth resistor is arranged between the G pole and the S pole of the second MOS tube, a third voltage stabilizing diode is connected in parallel at two ends of the tenth resistor, the G pole of the second MOS tube is connected with an eleventh resistor, the other end of the eleventh resistor is connected with a second triode, and the D pole of the second MOS tube is connected with a short-circuit protection module.
9. The GPS module interface circuit according to claim 1, wherein the short-circuit protection module comprises a PTC thermistor.
10. The GPS module interface circuit according to claim 1, wherein the voltage detection module includes a voltage detection chip.
CN202120698981.7U 2021-04-06 2021-04-06 GPS module interface circuit Active CN214623051U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202120698981.7U CN214623051U (en) 2021-04-06 2021-04-06 GPS module interface circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202120698981.7U CN214623051U (en) 2021-04-06 2021-04-06 GPS module interface circuit

Publications (1)

Publication Number Publication Date
CN214623051U true CN214623051U (en) 2021-11-05

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202120698981.7U Active CN214623051U (en) 2021-04-06 2021-04-06 GPS module interface circuit

Country Status (1)

Country Link
CN (1) CN214623051U (en)

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