CN116735929A - Shunt, new energy automobile and energy storage equipment thereof - Google Patents

Shunt, new energy automobile and energy storage equipment thereof Download PDF

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Publication number
CN116735929A
CN116735929A CN202310696328.0A CN202310696328A CN116735929A CN 116735929 A CN116735929 A CN 116735929A CN 202310696328 A CN202310696328 A CN 202310696328A CN 116735929 A CN116735929 A CN 116735929A
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CN
China
Prior art keywords
module
current
analog
signal
digital conversion
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CN202310696328.0A
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Chinese (zh)
Inventor
李波
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C&b Electronics SZ Co ltd
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C&b Electronics SZ Co ltd
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Priority to CN202310696328.0A priority Critical patent/CN116735929A/en
Publication of CN116735929A publication Critical patent/CN116735929A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
    • G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
    • G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
    • G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
    • G01R15/146—Measuring arrangements for current not covered by other subgroups of G01R15/14, e.g. using current dividers, shunts, or measuring a voltage drop
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/32—Compensating for temperature change

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Current Or Voltage (AREA)

Abstract

The invention discloses a current divider, a new energy automobile and energy storage equipment thereof. The current divider comprises a current sensing part, a sampling module and a communication module, wherein the sampling module is electrically connected with the current sensing part, the communication module is provided with a communication end for establishing communication connection with an external terminal, and the communication module is electrically connected with an output end of the sampling module. The invention aims to improve the detection precision of a shunt.

Description

Shunt, new energy automobile and energy storage equipment thereof
Technical Field
The invention relates to the technical field of current splitters, in particular to a current splitter, a new energy automobile and energy storage equipment thereof.
Background
In a new energy automobile, a shunt is often arranged in a loop to be detected in series to detect current flowing on the loop to be detected, and the detection result is output to the outside. The concrete working process is as follows: the main controller in the shunt detects the voltage on the current sensing part in the shunt, then calculates the current value flowing on the current circuit to be detected according to the voltage on the current sensing part and the known resistance value of the current sensing part, and finally outputs the current detection result to an external terminal electrically connected with the current value, such as a whole vehicle controller, a battery management controller and the like.
However, the inventors of the present application found the following problems: when a user drives a new energy automobile, the user often has the action of suddenly stepping on an accelerator (electric valve) to instantly accelerate the new energy automobile or suddenly stepping on a brake to brake the new energy automobile, which can cause a current of hundreds of amperes or even thousands of amperes to be generated in the automobile in a short time. It can be understood that a larger current can generate a magnetic field with higher intensity, and the magnetic field with higher intensity easily interferes with part of processing calculation units in the main controller in the current divider connected in series on the lead, thereby causing the main controller to work and malfunction, and greatly affecting the accuracy of detecting current by adopting the current divider in the new energy automobile.
Disclosure of Invention
The application mainly aims to provide a current divider, which aims to improve the accuracy of detecting current by using the current divider in a new energy automobile.
To achieve the above object, the present application proposes a shunt including:
a current sensing member;
the sampling module is electrically connected with the current sensing piece;
the communication module is provided with a communication end used for establishing communication connection with an external terminal, and is electrically connected with the output end of the sampling module;
The sampling module is used for collecting the voltage on the current sensing piece and outputting a corresponding collecting signal, and then outputting the collecting signal to an external terminal through the communication module.
Optionally, the sampling module includes:
the analog-to-digital conversion module is electrically connected with the current sensing piece and is used for detecting the voltage of at least one end of the current sensing piece and outputting the acquired at least one voltage signal to the communication module after analog-to-digital conversion.
Optionally, the sampling module includes:
the differential amplification module is electrically connected with two ends of the current sensing piece respectively and is used for amplifying the acquired voltages at two ends of the current sensing piece in a differential mode and then outputting a second voltage signal;
the analog-to-digital conversion module is electrically connected with the differential amplifier module and is used for outputting the second voltage signal to the communication module after analog-to-digital conversion.
Optionally, the analog-to-digital conversion module is provided with an overcurrent signal output end, and the overcurrent signal output end of the analog-to-digital conversion module is electrically connected with the communication module;
the analog-to-digital conversion module is used for outputting a first overcurrent alarm signal through the overcurrent signal output end of the analog-to-digital conversion module and then transmitting the first overcurrent alarm signal to an external terminal through the communication module when the voltage on the current sensing piece reaches a preset alarm voltage value.
Optionally, the sampling module further includes:
the output end of the Hall current detection module is electrically connected with the communication module;
the Hall current detection module is used for detecting the current flowing on the current sensing piece and outputting a corresponding magnetic field detection signal to an external terminal through the communication module;
or,
the output end of the Hall current detection module is electrically connected with the analog-to-digital conversion module;
the Hall current detection module is used for detecting the intensity of a magnetic field generated by the current flowing through the current sensing piece and outputting a corresponding magnetic field detection signal;
the analog-to-digital conversion module is further configured to output the magnetic field detection signal to the communication module after analog-to-digital conversion, so as to output the magnetic field detection signal to an external terminal through the communication module.
Optionally, the hall current detection module is provided with a signal synchronization end, and the analog-to-digital conversion module is provided with a signal synchronization end; and the signal synchronization end of the Hall current detection module is electrically connected with the signal synchronization end of the analog-to-digital conversion module.
Optionally, the hall current detection module further includes an overcurrent signal output end, and the overcurrent signal output end of the hall current detection module is electrically connected with the communication module;
The Hall current detection module is used for outputting a second overcurrent alarm signal through the overcurrent signal output end of the Hall current detection module when the intensity of a magnetic field generated by current flowing through the current sensing piece reaches a preset alarm intensity, and then outputting the second overcurrent alarm signal to an external terminal through the communication module.
Optionally, the sampling module further includes:
the output end of the logic AND gate module is electrically connected with the communication module;
the analog-to-digital conversion module is provided with an overcurrent signal output end, the Hall current detection module is provided with an overcurrent signal output end, and the overcurrent signal output end of the analog-to-digital conversion module and the overcurrent signal output end of the Hall current detection module are respectively and electrically connected with the logic AND gate module;
the analog-to-digital conversion module is used for outputting a first overcurrent alarm signal through an overcurrent signal output end of the analog-to-digital conversion module when the voltage on the current sensing piece reaches a preset alarm voltage value;
the Hall current detection module is used for outputting a second overcurrent alarm signal through an overcurrent signal output end of the Hall current detection module when the intensity of a magnetic field generated by current flowing through the current sensing piece reaches a preset alarm intensity.
Optionally, the analog-to-digital conversion module and the communication module are integrated in the same integrated chip.
Optionally, the number of the analog-to-digital conversion modules is plural.
Optionally, a plurality of the analog-to-digital conversion modules are integrated in the same integrated chip.
Optionally, the shunt further comprises:
the temperature detection module is electrically connected with the communication module and is used for detecting the temperature of the current sensing piece and outputting corresponding temperature detection signals to an external terminal through the communication module.
Optionally, the sampling module includes:
the analog-to-digital conversion module is electrically connected with the current sensing piece and is used for detecting the voltage of at least one end of the current sensing piece and outputting the acquired at least one voltage signal to the communication module after analog-to-digital conversion;
the shunt further comprises:
the temperature detection module is electrically connected with the analog-to-digital conversion module and is used for outputting a temperature detection signal of corresponding voltage according to the temperature of the current sensing piece;
the analog-to-digital conversion module is further configured to output the temperature detection signal to the communication module after analog-to-digital conversion, so as to output the temperature detection signal to an external terminal through the communication module.
Optionally, the shunt further comprises:
the storage module is used for storing preset calibration parameters and is provided with a second communication end used for accessing an external terminal; or,
the shunt further comprises:
the storage module is used for storing preset calibration parameters and is electrically connected with the communication module.
Optionally, the shunt further comprises: the electronic tag is arranged on the shunt.
Optionally, the shunt further comprises: the electronic tag is arranged on the shunt.
Optionally, the shunt further comprises:
at least one sampling output; the sampling output end is electrically connected with the current sensing piece and used for being connected with an external terminal, and is used for sampling and outputting the voltage on the current sensing piece.
Optionally, the shunt further comprises:
and the first end of the isolation module is electrically connected with the communication end of the communication module, and the second end of the isolation module is used for accessing an external terminal.
Optionally, the shunt further comprises:
the interface module is provided with a plurality of pins and is used for accessing an external terminal;
The communication end of the communication module of the shunt, the output end of the temperature detection module and the second communication end of the storage module are respectively connected with a plurality of pins of the interface module in a one-to-one correspondence manner; or,
the shunt further comprises:
the communication end of the communication module of the shunt, the output end of the temperature detection module and the second communication end of the storage module are respectively connected with the plurality of interface modules in a one-to-one correspondence mode.
Optionally, the current sensing element comprises at least one current sensing resistor.
The invention also provides a new energy automobile, which comprises the shunt according to any one of the above.
The invention also proposes an energy storage device comprising a shunt as defined in any one of the preceding claims.
The invention provides a current divider, which comprises a current sensing part, a sampling module and a communication module, wherein the communication module is provided with a communication end for establishing communication connection with an external terminal, the communication module is electrically connected with an output end of the sampling module, and the sampling module is used for sampling voltage on the current sensing part and outputting corresponding acquisition signals to the external terminal through the communication module. Through the arrangement, in practical application, the voltage signal on the current sensing part can be directly transmitted to an external terminal in the automobile, such as a battery management controller in the battery module or a whole automobile controller, through the communication module after analog-to-digital conversion, so that the external terminal in the automobile confirms the voltage on the current sensing part according to the signal transmitted by the communication module, and then the current flowing through the current sensing part is obtained through calculation, namely the current on the current loop to be measured is obtained through calculation.
Therefore, when a magnetic field with higher intensity is generated in the vehicle because of high current, the communication module is used for transmitting the sampling result according to the preset communication protocol, so that the data can be ensured to have stronger anti-interference capability in the transmission process, and the controller in the vehicle with stronger anti-interference capability on the magnetic field, such as a whole vehicle controller and a battery management controller in a battery module, is used for calculating according to the sampling result to obtain a final current detection result, so that the situation that errors occur in the calculation result because of the magnetic field interference in the background art can not occur, the accuracy of detecting the current by adopting the current divider in the new energy vehicle is effectively improved, and the actual current detection accuracy of the current divider is improved.
Meanwhile, it can be understood that during the operation of the new energy automobile, more heat is generated by the circuit module, particularly the battery module, inside the new energy automobile, so that the operating temperature of the circuit module in the automobile is increased. Compared with the current divider in the prior art, the current divider provided by the invention has the advantages that as the working part for finally calculating and obtaining the current detection result is completed by the controller module which is in a better working environment or has stronger heat dissipation capability structurally, the situation that the main controller fails or fails due to the fact that the working environment is too high due to the fact that the current divider is arranged close to a certain module, and further the current result calculation error is caused can not occur, for example, the current divider which is arranged close to a battery module and is connected in series in a power supply loop of the battery module, the situation that the main controller fails or fails due to the fact that the temperature of the battery module is too high during the working process, and further the situation that the output current detection result is wrong can occur, the accuracy of detecting current by adopting the current divider in a new energy automobile is further improved, and the current detection accuracy of the current divider is improved.
In addition, it can be understood that, as the working part of finally calculating and obtaining the current detection result is completed by the controller module which is in a better working environment or has stronger heat dissipation capability structurally, namely, in the process of realizing the current detection, the current divider disclosed by the invention adopts the controllers which are originally arranged in the automobile, and the controllers or other related circuit modules can not be additionally arranged in the current divider, the wiring area of the battery module is further reduced, the integration level of the current divider is further improved, and the production cost of the current divider is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic circuit diagram of an embodiment of a current divider according to the present invention;
FIG. 2 is a schematic circuit diagram of another embodiment of a shunt according to the present invention;
FIG. 3 is a schematic circuit diagram of a current divider according to another embodiment of the present invention;
FIG. 4 is a schematic circuit diagram of a current divider according to another embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of a current divider according to another embodiment of the present invention;
FIG. 6 is a schematic circuit diagram of another embodiment of a shunt according to the present invention;
FIG. 7 is a schematic circuit diagram of a current divider according to another embodiment of the present invention;
FIG. 8 is a schematic circuit diagram of another embodiment of a shunt according to the present invention;
FIG. 9 is a schematic circuit diagram of a current divider according to another embodiment of the present invention;
FIG. 10 is a schematic circuit diagram of a current divider according to another embodiment of the present invention;
FIG. 11 is a schematic circuit diagram of a current divider according to another embodiment of the present invention;
FIG. 12 is a schematic circuit diagram of another embodiment of a shunt according to the present invention;
fig. 13 is a schematic circuit block diagram of a current divider according to another embodiment of the present invention.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In a new energy automobile, a shunt is often arranged in a loop to be detected in series to detect current flowing on the loop to be detected, and the detection result is output to the outside. The concrete working process is as follows: the main controller in the shunt detects the voltage on the current sensing part in the shunt, then calculates the current value flowing on the current circuit to be detected according to the voltage on the current sensing part and the known resistance value of the current sensing part, and finally outputs the current detection result to an external terminal electrically connected with the current value, such as a whole vehicle controller, a battery management controller and the like.
However, the inventors of the present application found the following problems: when a user drives a new energy automobile, the user often has the action of suddenly stepping on an accelerator (electric valve) to instantly accelerate the new energy automobile or suddenly stepping on a brake to brake the new energy automobile, which can cause a current of hundreds of amperes or even thousands of amperes to be generated in the automobile in a short time. It can be understood that a larger current can generate a magnetic field with higher intensity, and the magnetic field with higher intensity easily interferes with part of processing calculation units in the main controller in the current divider connected in series on the lead, thereby causing the main controller to work and malfunction, and greatly affecting the accuracy of detecting current by adopting the current divider in the new energy automobile.
To this end, referring to fig. 1, in an embodiment of the present invention, a shunt includes:
a current sensing member 10;
the sampling module 20, the sampling module 20 is connected with the current sensing piece 10 electrically;
the communication module 30, the communication module 30 has a communication end for establishing communication connection with an external terminal, the communication module 30 is electrically connected with the output end of the sampling module 20;
the sampling module 20 is configured to collect a voltage on the current sensing element 10 and output a corresponding collection signal to an external terminal through the communication module 30.
In this embodiment, alternatively, the current sensing element 10 may be implemented by at least one current sensing resistor, such as an alloy resistor, and the current sensing resistor may be directly connected in series in the loop to be tested by welding; alternatively, the current sensing element 10 may be implemented by at least one current sensing resistor and a conductive element connected to the current sensing resistor, for example, copper bars for conducting electricity and/or fixing to corresponding connection ends in the circuit to be tested are disposed on two sides of an alloy resistor, and the sampling module 20 may collect and output the voltage on the alloy resistor.
In this embodiment, optionally, the circuit modules such as the sampling module 20 and the communication module 30 may be directly disposed on the surface of the shunt, for example, on the package housing of the current sensing resistor, and the package housing may be provided with an opening, so that the sampling module 20 may be electrically connected to the current sensing element 10 through the opening via a connection end or an electrical connection wire. Optionally, the circuit modules such as the sampling module 20 and the communication module 30 may also be disposed inside the shunt, for example, a circuit board is disposed inside the shunt, and the circuit modules are disposed on the circuit board, where the sampling module 20 may be electrically connected to the current sensing element 10 through an electrical connection wire or through the circuit board.
Alternatively, in one embodiment, referring to FIG. 2, sampling module 20 includes:
the analog-to-digital conversion module 21 is electrically connected to the current sensing element 10, and the analog-to-digital conversion module 21 is configured to detect a voltage at least one end of the current sensing element 10, and output the acquired at least one voltage signal to the communication module 30 after analog-to-digital conversion.
In this embodiment, the Analog-to-digital conversion module 21 may be implemented by an ADC (Analog-to-Digital Converter Analog-to-digital converter) conversion chip. It will be appreciated that in practical applications, one end of the current sensing element 10 may be directly electrically connected to the positive power end or the negative power end of the circuit to be tested, so that the voltage at the other end of the current sensing element 10 can be collected by the analog-to-digital conversion module 21 at this time, so that the external terminal can finally confirm the actual voltage. Similarly, if both ends of the current sensing element 10 are connected with components in other circuits to be tested, or in order to improve the detection accuracy, so as to eliminate the influence of the connection line between one end of the current sensing element 10 and the positive end or the negative end of the power supply, the analog-to-digital conversion module 21 may collect voltages at both ends of the current sensing element 10, and convert the collected voltage signals into digital signals and output the digital signals.
It will be appreciated that the number of the analog-to-digital conversion modules 21 may be plural, for example, for one end of the current sensing element 10, plural analog-to-digital conversion modules 21 may be provided to collect voltages on the segment simultaneously, and output plural voltage collection signals that are digital signals, so that the external terminal at the back end can calculate the voltages on the current sensing element 10 more accurately according to a preset calculation method, such as weighting calculation, average calculation, etc., according to the plural voltage collection signals transmitted from the communication module 30, thereby improving the accuracy of current detection.
Alternatively, in another embodiment, referring to fig. 3, the sampling module 20 includes:
the differential amplifier module 22 is electrically connected with two ends of the current sensing element 10 respectively, and is used for amplifying the acquired voltages at two ends of the current sensing element 10 by differential and outputting a second voltage signal;
the analog-to-digital conversion module 21, the analog-to-digital conversion module 21 is electrically connected with the differential amplifier module 22, and the analog-to-digital conversion module 21 is configured to output the second voltage signal to the communication module 30 after analog-to-digital conversion.
In this embodiment, the analog-to-digital conversion module 21 may be implemented by using the device in the foregoing embodiment, the differential amplifier module 22 may be implemented by using a differential amplifier, and the differential amplifier may directly perform differential amplification on the voltages at two ends of the collected current sensing element 10 and output a second voltage signal to the analog-to-digital conversion module 21, so that the analog-to-digital conversion module 21 performs analog-to-digital conversion on the second voltage signal and then outputs the second voltage signal. The voltage of the second voltage signal is the voltage on the current sensor 10. The amplification factor may be determined by the developer's choice of the differential amplifier, for example, the developer needs to amplify by a factor of 10, and then a differential amplifier with a factor of 10 is selected to realize the amplification factor. In this way, in practical application, the external terminal at the back end is not required to calculate the voltage on the current sensing element 10, so that the space in the external terminal for storing the calculation code is saved. The voltage on the current sensing element 10 can be confirmed only by the second voltage signal and a known preset amplification factor (which may be stored in the memory module or directly pre-stored in the external terminal).
In the present embodiment, the communication module 30 may be implemented by using a bus communication module 30, such as a CAN communication transceiver, a LIN communication transceiver, or a digital signal interface module with anti-interference capability, such as an isspi communication chip. The communication end of the communication module 30 may be a connection end, such as a connection interface, a connection socket, a connection male, etc., for accessing an external terminal, such as a vehicle controller in an automobile, a BMS (Battery Management System battery management system) controller in a battery module via an electrical connection line. In this way, in practical application, the communication module 30 may output the signal output by the sampling module 20 to the external terminal through the communication terminal according to the preset communication protocol corresponding to the type of the signal, so that the external terminal determines the voltage on the current sensing element 10 according to the signal transmitted by the communication module 30, and then calculates the current flowing through the current sensing element 10 according to the pre-stored resistance value of the current sensing element 10, that is, determines the value of the current flowing through the current loop to be measured. It will be appreciated that the signal output by the communication module 30 according to the preset communication protocol has a strong anti-interference capability, such as magnetic interference resistance and temperature interference resistance, and can be remotely transmitted. Through the arrangement, the current divider only outputs the sampling result, and the final current result is calculated through the controller arranged in the new energy automobile, so that the situation that the main controller in the current divider fails due to environmental factors, such as high-intensity electromagnetic fields, and errors occur in the output current result is effectively avoided, and the accuracy of detecting current by the current divider in the new energy automobile is improved.
It will be appreciated that the analog to digital conversion module 21 and the communication module 30 are integrated within the same integrated chip, thereby reducing the circuit routing area in the shunt.
It should be understood that, since the signal transmission environment in the new energy automobile is more complex and the high-voltage environment is more, in another embodiment, the shunt may further include: and the first end of the isolation module is electrically connected with the communication end of the communication module 30, and the second end of the isolation module is used for accessing an external terminal. The isolation module can be implemented by an isolation chip, so that the low-voltage signal output by the communication module 30 is converted into a high-voltage signal and then transmitted to the external terminal through the electrical connection wire, so that the quality of the signal in the signal transmission process is ensured, and the working reliability of the current divider is further improved.
Furthermore, it is understood that the shunt further comprises: at least one sampling output; the sampling output terminal is electrically connected with the current sensing element 10 and is used for being connected to an external terminal, and is used for sampling and outputting the voltage on the current sensing element 10. The sampling end may be implemented in a form of a pad, a probe, an interface, or the like, and the sampling output end is directly connected to one end of the current sensing element 10, so that a voltage signal at one end of the current sensing element 10 is directly output to an external terminal. In this way, when the external terminal finds that the communication module 30 is faulty or abnormal, the actual voltage on the current sensing element 10 can be determined according to the voltage signal output by the sampling output end, so as to calculate and obtain the value of the current flowing on the loop to be measured. Through the arrangement, the redundancy capacity of the current divider is effectively improved, and the reliability of current detection by adopting the current divider in the new energy automobile is further ensured.
The invention provides a current divider, which comprises a current sensing part 10, a sampling module 20 and a communication module 30, wherein the communication module 30 is provided with a communication end for establishing communication connection with an external terminal, the communication module 30 is electrically connected with an output end of the sampling module 20, and the sampling module 20 is used for sampling the voltage on the current sensing part 10 and outputting corresponding acquisition signals to the external terminal through the communication module 30. Through the above arrangement, in practical application, the voltage signal on the current sensing element 10 can be directly transmitted to an external terminal in the automobile, such as a battery management controller in the battery module or a whole vehicle controller, through the communication module 30 after being subjected to analog-to-digital conversion according to a preset communication protocol, so that the external terminal in the automobile confirms the voltage on the current sensing element 10 according to the signal transmitted by the communication module 30, and then the current flowing through the current sensing element 10 is obtained through calculation, namely the current on the current loop to be measured is obtained through calculation.
Therefore, when a magnetic field with higher intensity is generated in the vehicle because of high current, the communication module 30 is used for transmitting the sampling result according to the preset communication protocol, so that the data can be ensured to have stronger anti-interference capability in the transmission process, and the controller in the vehicle with stronger anti-interference capability on the magnetic field, such as the whole vehicle controller and the battery management controller in the battery module, can calculate to obtain the final current detection result according to the sampling result, so that the situation that errors occur in the calculation result because of the magnetic field interference in the background art can not occur, and the accuracy of detecting the current by adopting the current divider in the new energy vehicle is effectively improved, namely, the detection accuracy of the current by the current divider is improved.
Meanwhile, it can be understood that during the operation of the new energy automobile, more heat is generated by the circuit module, particularly the battery module, inside the new energy automobile, so that the operating temperature of the circuit module in the automobile is increased. Compared with the current divider in the prior art, the current divider provided by the invention has the advantages that as the working part for finally calculating and obtaining the current detection result is completed by the controller module which is in a better working environment or has stronger heat dissipation capability structurally, the situation that the main controller fails or fails due to the fact that the working environment is too high due to the fact that the current divider is arranged close to a certain module, and further the current result calculation error is caused can not occur, for example, the current divider which is arranged close to a battery module and is connected in series in a power supply loop of the battery module, the situation that the main controller fails or fails due to the fact that the temperature of the battery module is too high during the working process, and further the situation that the output current detection result is wrong can occur, the accuracy of detecting current by adopting the current divider in a new energy automobile is further improved, and the current detection accuracy of the current divider is improved.
In addition, it can be understood that, as the working part of finally calculating and obtaining the current detection result is completed by the controller module which is in a better working environment or has stronger heat dissipation capability structurally, namely, in the process of realizing the current detection, the current divider disclosed by the invention adopts the controllers which are originally arranged in the automobile, and the controllers or other related circuit modules can not be additionally arranged in the current divider, the wiring area of the battery module is further reduced, the integration level of the current divider is further improved, and the production cost of the current divider is reduced.
In an embodiment of the present invention, referring to fig. 8, the analog-to-digital conversion module 21 has an over-current signal output end, and the over-current signal output end of the analog-to-digital conversion module 21 is electrically connected with the communication module;
the analog-to-digital conversion module 21 is configured to output a first overcurrent alarm signal through the overcurrent signal output end of the analog-to-digital conversion module 21 and then to an external terminal through the communication module when the voltage on the current sensing element reaches a preset alarm voltage value.
In this embodiment, the analog-to-digital conversion chip of the analog-to-digital conversion module 21 may further integrate a differential module, a comparator, and a reference voltage source, or the above circuit is a peripheral circuit of the analog-to-digital conversion chip. Specifically, the analog-to-digital conversion chip samples voltages at two ends of the current sensing element, converts the voltage signals into digital signals and outputs the digital signals, and meanwhile, the voltage signals at two ends are output to the differential module, so that the differential module performs differential amplification on the voltage signals and outputs the differential signals to the comparator, and the comparator compares the differential amplified voltage with a reference voltage provided by the reference voltage source, wherein the reference voltage is a preset alarm voltage. It can be understood that the reference voltage can be set correspondingly by a developer according to the use environment requirement of the actual shunt, for example, a voltage conversion chip for setting and outputting the required reference voltage is arranged, and the input end of the voltage conversion chip is electrically connected with one end of the current sensing element so as to be used for providing the reference voltage after the voltage at one end of the current sensing element is subjected to voltage conversion. If the voltage output by the current differential amplifier module reaches the preset alarm voltage, it indicates that the current on the current loop to be measured reaches the preset alarm current, and the output end of the comparator (the overcurrent signal output end of the analog-to-digital conversion module 21) outputs a first overcurrent alarm signal, such as a high-level signal. If the voltage output by the current differential amplifier module does not reach the preset alarm voltage, the current on the current loop to be measured does not reach the preset alarm current, and the comparator outputs a first non-overcurrent signal, such as a low-level signal. In other words, the research staff considers the current over-current value of the current loop to be measured, multiplies the over-current value by the current sensing resistor in the current sensing element to determine the voltage on the current sensing element when the over-current is performed, multiplies the voltage by the amplification factor of the differential amplifier module to obtain the reference voltage, and performs corresponding setting. The signal output by the comparator is processed by the communication module according to a preset communication protocol and then output to the external terminal so as to provide overcurrent judgment for the external terminal. When the external terminal receives the first overcurrent alarm signal, the corresponding overcurrent protection action can be immediately executed, or the corresponding action is executed according to the current value flowing on the current divider obtained by calculation, for example, the power of equipment in the current circuit to be tested is slightly reduced, so that the risk of overcurrent faults in the circuit to be tested is reduced.
Through the arrangement, the overcurrent detection can be realized on the current divider through hardware, and compared with the situation that whether the external terminal is in overcurrent or not is judged according to the calculation result, the overcurrent detection has a faster response speed, so that the external terminal can more quickly and clearly know that the current loop to be detected has an overcurrent condition. The invention further improves the safety and reliability of the current divider used in the new energy automobile.
It can be appreciated that the number of the analog-to-digital conversion modules 21 may be plural, for example, include plural analog-to-digital conversion chips, so as to output plural sampled voltage signals and plural first overcurrent alarm signals to the external terminal via the communication module, so as to improve the accuracy of calculating the current value of the current flowing through the current sensing element by the external terminal, and to mention the accuracy of judging whether the overcurrent condition occurs in the loop to be tested, which is connected to the current sensing element. In addition, a plurality of analog-to-digital conversion chips can be integrated in the same integrated chip, so that the wiring area on the circuit board is reduced.
In an embodiment of the present invention, another module capable of collecting the current flowing through the current sensing element may be further disposed in the sampling module, so as to form mutual assistance and redundancy with the analog-digital conversion module 21, thereby further improving the accuracy and reliability of detecting the current by the current divider of the present invention.
Optionally, in an embodiment of the present invention, referring to fig. 9, the sampling module further includes:
the output end of the Hall current detection module 23 is electrically connected with the communication module;
the hall current detection module 23 is configured to detect a current flowing through the current sensing element and output a corresponding magnetic field detection signal to an external terminal through the communication module;
in this embodiment, the hall current detection module 23 may be implemented by using a hall current detection chip, where the hall current detection module 23 can detect the magnetic field strength generated by the current currently flowing through the current sensing element, and the corresponding magnetic field detection signal is a digital signal, and is sent to an external terminal through the communication module. In this way, the external terminal may obtain the current currently flowing through the current sensing element according to the magnetic field detection signal and the preset magnetic field strength-current value mapping table (which may be stored in the storage module of the embodiment described below or preset recorded by the manufacturer in advance), and perform corresponding processing, such as averaging or weighting, on the current value obtained from the magnetic field detection signal and the current value obtained by calculating the voltage signal output by the analog-to-digital conversion module 21, so as to obtain the current value that flows through the current sensing element more accurately.
It will be appreciated that the communication module may also be integrated within the hall current detection module 23, i.e. the hall current detection module 23 is directly connected to an external terminal.
Optionally, in another embodiment of the present invention, referring to fig. 10, the sampling module further includes:
the output end of the Hall current detection module 23 is electrically connected with the analog-to-digital conversion module 21;
a hall current detection module 23 for detecting the intensity of a magnetic field generated by the current flowing through the current sensing member and outputting a corresponding magnetic field detection signal;
the analog-to-digital conversion module 21 is further configured to output the magnetic field detection signal after analog-to-digital conversion to the communication module, so as to output the magnetic field detection signal to an external terminal through the communication module.
In this embodiment, the hall current-detecting module 23 may not be integrated with the analog-to-digital conversion module 21, so that the magnetic field-detecting signal, which is an analog signal, is output to the analog-to-digital conversion module 21 first, so that the analog-to-digital conversion module 21 converts the signal into a digital signal, and then outputs the digital signal to the external terminal through the communication module, so that the external terminal determines the current currently flowing through the current-sensing element according to the magnetic field-detecting signal, and performs the same actions as in the above embodiment, which are not repeated here.
Further, as can be appreciated, referring to fig. 11, the hall current detection module has a signal synchronization terminal, and the analog-to-digital conversion module has a signal synchronization terminal; and the signal synchronization end of the Hall current detection module is electrically connected with the signal synchronization end of the analog-to-digital conversion module.
It should be noted that, the sampling frequency of the hall current detection module is inconsistent with the sampling frequency of the analog-to-digital conversion module, so in practical application, the synchronous ends on two sides can be electrically connected together so as to keep the same sampling frequency, and thus the current value obtained by the external terminal according to the results output by the two modules is the current value at the same sampling moment, so that the accuracy of current value detection is ensured.
Referring to fig. 12, in an embodiment of the present invention, the hall current detection module 23 further includes an overcurrent signal output terminal, and the overcurrent signal output terminal of the hall current detection module 23 is electrically connected to the communication module;
the hall current detection module 23 is configured to output a second overcurrent alarm signal through the overcurrent signal output end of the hall current detection module 23 and then send the second overcurrent alarm signal to an external terminal through the communication module when the intensity of the magnetic field generated by the current flowing through the current sensing element reaches the preset alarm intensity.
In this embodiment, as can be seen from the above description, the hall current detection module 23 generates a voltage signal that is an analog signal and characterizes the magnetic field strength according to the magnetic field generated by the current on the current sensing element, and then outputs the voltage signal as a digital signal after performing internal analog-to-digital conversion, or directly outputs the analog signal as the magnetic field detection signal.
It will be appreciated that within the hall current detection module 23, a comparator and a reference voltage source may also be provided, which may be provided within the hall current detection chip or as an external circuit to the hall current detection chip. The reference voltage source is used to provide the reference voltage to the comparator, and it is understood that the source of the reference voltage is consistent with the concept of setting the reference voltage in the analog-to-digital conversion module 21 in real time. In other words, the voltage signal which is generated by the hall current detection chip and is an analog signal and represents the magnetic field strength is output to the comparator, and is compared with the reference voltage, if the voltage signal is greater than the reference voltage, the current on the current loop to be detected reaches the preset alarm current, that is, the strength of the magnetic field generated by the current flowing through the current sensing element reaches the preset alarm strength, and at the moment, the output end (the overcurrent signal output end of the hall current detection module 23) of the comparator outputs a second overcurrent alarm signal, for example, a high level signal; if the voltage signal is smaller than the reference voltage, it indicates that the current on the current loop to be measured does not reach the preset alarm current, and the output end of the comparator outputs a second non-overcurrent signal, such as a low-level signal. The signal output by the comparator is processed by the communication module according to a preset communication protocol and then output to the external terminal so as to provide overcurrent judgment for the external terminal. When the external terminal receives the first overcurrent alarm signal, the corresponding overcurrent protection action can be immediately executed, or the corresponding action is executed according to the current value flowing on the current divider obtained by calculation, for example, the power of equipment in the current circuit to be tested is slightly reduced, so that the risk of overcurrent faults in the circuit to be tested is reduced.
Still further, it is understood that in an embodiment of the present invention, both the analog-to-digital conversion module 21 and the hall current detection module 23 may implement the operation of the overcurrent detection, so as to implement redundancy of the overcurrent detection. Furthermore, in another embodiment, the over-current detection operations of the analog-to-digital conversion module 21 and the hall current detection module 23 may also cooperate with each other, and specifically, referring to fig. 13, the sampling module further includes:
the output end of the logic AND gate module 24 is electrically connected with the communication module;
the analog-to-digital conversion module 21 is provided with an overcurrent signal output end, the Hall current detection module 23 is provided with an overcurrent signal output end, and the overcurrent signal output end of the analog-to-digital conversion module 21 and the overcurrent signal output end of the Hall current detection module 23 are respectively and electrically connected with the logic AND gate module 24;
the analog-to-digital conversion module 21 is configured to output a first overcurrent alarm signal through an overcurrent signal output end of the analog-to-digital conversion module 21 when the voltage on the current sensing element reaches a preset alarm voltage value;
the hall current detection module 23 is configured to output a second overcurrent alarm signal through an overcurrent signal output terminal of the hall current detection module 23 when the intensity of the magnetic field generated by the current flowing through the current sensing element reaches the preset alarm intensity.
Specifically, the first overcurrent alarm signal and the second overcurrent alarm signal need to be both high-level signals or both low-level signals, and the above embodiments are described by taking the example that the first overcurrent alarm signal and the second overcurrent alarm signal are both high-level signals and the first non-overcurrent alarm signal and the second non-overcurrent alarm signal are both low-level signals.
If the analog-to-digital conversion module 21 outputs the first overcurrent alarm signal and the hall current detection module 23 also outputs the second overcurrent alarm signal, the logic and gate module 24 will similarly output the high-level signal to the external terminal through the communication module, and the external terminal will confirm that the current on the current loop to be measured exceeds the preset alarm current. If the first no-overcurrent alarm signal output by the analog-to-digital conversion module 21 and/or the hall current detection module 23 outputs the second no-overcurrent alarm signal, the logic and gate module 24 outputs a low-level signal to the external terminal through the communication module, and the external terminal confirms that the current on the current loop to be measured does not exceed the preset alarm current.
Thus, through the above arrangement, the current divider can still output a correct overcurrent detection signal when one of the hall current detection module 23 and the analog-to-digital conversion module 21 fails, thereby further improving the accuracy of current detection of the current divider.
It should be understood that, since the current divider is directly connected in series in the loop to be measured, if the current flowing through the loop to be measured is high, the temperature of the current sensing element 10 will also gradually rise, and the resistance value of the current sensing resistor in the current sensing element 10 will also change, and if the external terminal does not know that the resistance value of the current sensing resistor in the current sensing element 10 changes, an erroneous current result will be finally calculated.
To this end, referring to fig. 4, in an embodiment of the present invention, the shunt further includes:
the temperature detection module 40 is electrically connected to the communication module 30, and the temperature detection module 40 is configured to detect the temperature of the current sensing element 10 and output a corresponding temperature detection signal to an external terminal via the communication module 30.
In this embodiment, the temperature detection module 40 may be implemented using a digital temperature sensor. After detecting the temperature of the current sensing element 10, the digital temperature sensor outputs the temperature detection signal to the communication module 30 in the form of a digital signal, so that the communication module 30 outputs the temperature detection signal output by the digital temperature sensor to an external terminal through a communication terminal after post-processing according to a preset communication protocol. In this way, in practical application, the controller in the automobile can determine the temperature on the current sensing element 10 according to the temperature detection signal transmitted by the current communication module 30, and determine the resistance of the current sensing resistor in the current sensing element 10 according to the preset temperature-current sensing resistor resistance mapping table, so as to calculate and obtain the current value of the current loop to be measured more accurately.
In addition, it is understood that the temperature detection module 40 may also have a communication terminal for accessing the external terminal, so as to directly output the detection result to the external terminal in the form of a digital signal through the communication terminal.
Alternatively, in another embodiment, referring to fig. 5, the sampling module 20 includes:
the analog-to-digital conversion module 21 is electrically connected with the current sensing element 10, and the analog-to-digital conversion module 21 is used for detecting the voltage of at least one end of the current sensing element 10 and outputting the acquired at least one voltage signal to the communication module 30 after analog-to-digital conversion;
the shunt further includes:
the temperature detection module 40, the temperature detection module 40 is electrically connected with the analog-to-digital conversion module 21, and is used for outputting a temperature detection signal of a corresponding voltage according to the temperature of the current sensing piece 10;
the analog-to-digital conversion module 21 is further configured to output the temperature detection signal after analog-to-digital conversion to the communication module 30, so as to output the temperature detection signal to an external terminal through the communication module 30.
In the present embodiment, the temperature detection module 40 may be implemented using a thermosensitive device such as an NTC device, a PTC device, or the like, and a peripheral circuit. Specifically, the temperature detection module 40 includes a voltage dividing circuit formed by an NTC thermistor and a resistor with a fixed resistance, and voltage signals output by the NTC thermistor and the resistor through voltage division may be analog-to-digital converted by the analog-to-digital conversion module 21 and then output to an external terminal through the communication module 30, so that the external terminal determines the voltage value of the voltage signal output by the voltage division according to the signal transmitted by the communication module 30, and finally calculates the temperature value of the actual current sensing resistor according to the resistance value of the resistor with the fixed resistance and a preset NTC thermistor resistance-temperature mapping table. In this way, the resistance value of the current sensing resistor in the current sensing element 10 can be determined according to the preset temperature-current sensing resistor resistance value mapping table, so as to calculate the current value of the current loop to be measured more accurately. It can be appreciated that the temperature sensing device is adopted as the temperature detection module 40, so that the temperature detection module has high stability and reliability, and further ensures the accuracy of temperature detection.
Through the arrangement, in the actual use process of the current divider, the external terminal can determine the temperature change of the current sensing part 10 in the current divider, so that the current calculation process can be adjusted in real time according to the temperature change, and the accuracy of detecting the current by using the current divider in the new energy automobile is further improved.
It will be appreciated that the number of temperature detection modules 40 may be plural and disposed at different positions, for example, the current sensing element 10 in the shunt includes a current sensing resistor and copper bars disposed at two ends of the current sensing resistor, and the temperature detection modules 40 may be disposed on the current sensing resistor and copper bars near two ends of the current sensing resistor, so that the external terminal may finally calculate the temperature of the actual current sensing resistor according to plural temperature detection signals and a preset calculation strategy, for example, weighting proportionally, an averaging algorithm, etc., thereby improving the accuracy of the final current calculation.
It will be appreciated that there may be different process variations for the current sensing member 10 within each shunt at the time of actual shunt production. Therefore, when the current divider leaves the factory, the manufacturer performs the lower limit calibration on each current divider, that is, obtains the calibration parameters of the current sensing element 10 in the current divider, such as the temperature-resistance curve of the current sensing element 10, the actual resistance of the current sensing element 10, and so on, so as to ensure the detection precision of each current divider. In the prior art, the calibration parameters are directly preset in a main controller in the shunt, so that the main controller calculates the current value of the current circuit to be tested according to the preset calibration parameters and the sampled result. However, in the present application, in order to solve the problems in the background art, the main controller in the original shunt is removed, and the function of the removed main controller is performed by other existing controllers in the automobile, but the main controller in the automobile is often not provided by a manufacturer who develops the shunt, and the calibration parameters are not set therein, which results in that the accuracy of current detection by adopting the shunt of the present application is affected.
To this end, in one embodiment of the invention, the shunt further comprises: the electronic tag is arranged on the shunt.
In this embodiment, the electronic tag may be implemented as a two-dimensional code, a bar code, or the like. The electronic label may be printed or embossed on the surface of the package housing of the shunt. The research and development personnel of the current dividers can store the cloud end of the preset calibration parameters corresponding to each current divider, and the electronic tags corresponding to the preset calibration parameters of each current divider are arranged on the packaging shell of each current divider. Therefore, in the factory process of the new energy automobile, a worker can obtain the preset calibration parameters of the current shunt by only scanning the current electronic tag, and then the preset calibration parameters can be preset in an external terminal which is correspondingly connected with the current shunt in advance, so that in the actual use process of the new energy automobile, the external terminal can calculate the current value of the current flowing through the current loop to be measured more accurately according to the preset calibration parameters.
It should be understood that, although the above manner of using the electronic tag can achieve that when the new energy automobile is produced, the preset calibration parameters corresponding to the current divider electrically connected with the external terminal, that is, the corresponding controller in the automobile, are stored. However, in the actual production process, production line personnel in the production of new energy automobiles scan the current divider one by one, and record the current divider into the corresponding external terminal, so that the efficiency is low and the operation is troublesome. In addition, each external terminal can only store a preset calibration parameter, in other words, if the current shunt fails, when the shunt is exchanged, the procedure of the external terminal electrically connected with the shunt needs to be readjusted, which is very troublesome.
To this end, in another embodiment of the present invention, the shunt further comprises:
the storage module 50 is used for storing preset calibration parameters, and the storage module 50 is provided with a second communication end used for accessing an external terminal; or,
the shunt further includes:
the storage module 50, the storage module 50 is used for storing preset calibration parameters, and the storage module 50 is electrically connected with the communication module 30.
In this embodiment, the memory module 50 may be implemented by a memory chip such as a flash memory chip or an EEPROM chip. Alternatively, referring to fig. 6, a communication module 30 or a communication interface may be provided in the storage module 50 to directly access the external terminal via the second communication terminal and directly communicate with the external terminal. Alternatively, referring to fig. 7, the storage module 50 may be further electrically connected to the communication module 30 and communicate with an external terminal accessed via the communication module 30. Specifically, during the production of the shunts, the preset calibration parameters corresponding to each shunt may be directly stored in the storage module 50. Thus, when the splitter accesses the external terminal, the external terminal can directly communicate with the storage module 50 or the storage module 50 via the communication module 30 to obtain and call the preset calibration parameters in the storage module 50. In other words, in the actual production process, only the same set of calling program is required to be input to the external terminal connected with the shunt, so that the external terminal can call the preset calibration parameters in the shunt by itself when the actual new energy automobile works, and calculate the current value actually flowing through the shunt according to the preset calibration parameters. Through the arrangement, the production efficiency of the new energy automobile applying the diverter and the convenience for replacing the diverter on the new energy automobile are greatly improved.
Furthermore, it is to be understood that during operation of the new energy vehicle, the current on the circuit to be measured, in particular the current on the power circuit of the battery module, is a very important reference element in the control of the vehicle. Therefore, in order to ensure that the preset calibration parameters in the memory module 50 of the shunt are not rewritten, the manufacturer of the shunt may set the memory module 50 to a read-only state after the memory module 50 stores the preset calibration parameters. In addition, the storage module 50 can also be implemented by using an encryption chip, and the manufacturer of the current divider provides a decryption algorithm corresponding to the manufacturer of the new energy automobile, so that the preset calibration parameters in the encryption chip are ensured not to be rewritten maliciously.
In an embodiment of the present invention, in order to facilitate connection between the splitter and the external terminal, an interface may be further provided on the splitter.
Optionally, in an implementation, the shunt further includes:
the interface module is provided with a plurality of pins and is used for accessing an external terminal;
the communication end of the communication module 30 of the shunt, the output end of the temperature detection module 40, and the second communication end of the storage module 50 are respectively connected with a plurality of pins of the interface module in a one-to-one correspondence manner.
In this embodiment, the interface module may be implemented by a connector of any standard, for example, a connection male head, a connection female socket, etc., and a plurality of pins in the connector may be electrically connected to the connection terminals of the functional modules for accessing to the external terminals in the above embodiment respectively. Therefore, in the actual installation process of the current divider, only one electric connecting wire with one end provided with a connector corresponding to the interface module is needed, and the connector of the electric connecting wire is connected into the interface module, so that an electric connecting path can be established between the current divider and an external terminal, and the convenience of installing the current divider by production line operators of new energy automobiles is improved.
Optionally, in another embodiment, the shunt further comprises:
the communication end of the communication module 30 of the shunt, the output end of the temperature detection module 40 and the second communication end of the storage module 50 are respectively connected with the plurality of interface modules in a one-to-one correspondence manner.
It will be appreciated that in practical applications, it is possible that the placement of the connection terminals of some of the functional modules within the same interface module may result in signal interference. For example, sampling the high voltage analog signal output at the output may interfere with the digital signal output by the communication module 30. Meanwhile, the same interface module is not necessarily capable of bearing the voltages output by different connecting ends. Therefore, a plurality of interface modules can be respectively arranged in the shunt according to different points such as signal types and voltage levels output by the functional modules, and the interface modules are respectively and electrically connected with the connecting ends of the functional modules for accessing the external terminal. Therefore, the convenience of installing the current divider by the production line staff of the new energy automobile is improved, and meanwhile, the stability and reliability of the current divider to output signals are guaranteed.
The invention also provides a new energy automobile, which comprises the shunt according to any one of the above.
It is noted that, because the new energy automobile is based on the above-mentioned current divider, the embodiments of the new energy automobile include all the technical schemes of all the embodiments of the current divider, and the achieved technical effects are identical, and are not repeated here.
The invention also proposes an energy storage device comprising a shunt according to any one of the preceding claims.
In this embodiment, the energy storage device may be a battery module, an outdoor power module, or the like.
It is noted that, because the energy storage device of the present invention is based on the above-mentioned current divider, the embodiments of the energy storage device of the present invention include all the technical solutions of all the embodiments of the above-mentioned current divider, and the achieved technical effects are identical, and are not described herein again.
The foregoing description is only of alternative embodiments of the present invention, and is not intended to limit the scope of the invention, and all equivalent structural changes made by the description of the present invention and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the invention.

Claims (16)

1. A shunt, the shunt comprising:
a current sensing member;
the sampling module is electrically connected with the current sensing piece;
the communication module is provided with a communication end used for establishing communication connection with an external terminal, and is electrically connected with the output end of the sampling module;
the sampling module is used for collecting the voltage on the current sensing piece and outputting a corresponding collecting signal, and then outputting the collecting signal to an external terminal through the communication module.
2. The shunt of claim 1, wherein the sampling module comprises:
the analog-to-digital conversion module is electrically connected with the current sensing piece and is used for detecting the voltage of at least one end of the current sensing piece and outputting the acquired at least one voltage signal to the communication module after analog-to-digital conversion.
3. The shunt of claim 1, wherein the sampling module comprises:
the differential amplification module is electrically connected with two ends of the current sensing piece respectively and is used for amplifying the acquired voltages at two ends of the current sensing piece in a differential mode and then outputting a second voltage signal;
The analog-to-digital conversion module is electrically connected with the differential amplifier module and is used for outputting the second voltage signal to the communication module after analog-to-digital conversion.
4. The shunt of claim 2, wherein said analog-to-digital conversion module has an over-current signal output, said over-current signal output of said analog-to-digital conversion module being electrically connected to said communication module;
the analog-to-digital conversion module is used for outputting a first overcurrent alarm signal through the overcurrent signal output end of the analog-to-digital conversion module and then transmitting the first overcurrent alarm signal to an external terminal through the communication module when the voltage on the current sensing piece reaches a preset alarm voltage value.
5. The shunt of claim 2, wherein the sampling module further comprises:
the output end of the Hall current detection module is electrically connected with the communication module;
the Hall current detection module is used for detecting the current flowing on the current sensing piece and outputting a corresponding magnetic field detection signal to an external terminal through the communication module;
or,
the output end of the Hall current detection module is electrically connected with the analog-to-digital conversion module;
The Hall current detection module is used for detecting the intensity of a magnetic field generated by the current flowing through the current sensing piece and outputting a corresponding magnetic field detection signal;
the analog-to-digital conversion module is further configured to output the magnetic field detection signal to the communication module after analog-to-digital conversion, so as to output the magnetic field detection signal to an external terminal through the communication module.
6. The shunt of claim 5, wherein said hall current detection module has a signal synchronization terminal and said analog-to-digital conversion module has a signal synchronization terminal; and the signal synchronization end of the Hall current detection module is electrically connected with the signal synchronization end of the analog-to-digital conversion module.
7. The shunt of claim 5, wherein said hall current detection module further comprises an over-current signal output, said hall current detection module over-current signal output being electrically connected to a communication module;
the Hall current detection module is used for outputting a second overcurrent alarm signal through the overcurrent signal output end of the Hall current detection module when the intensity of a magnetic field generated by current flowing through the current sensing piece reaches a preset alarm intensity, and then outputting the second overcurrent alarm signal to an external terminal through the communication module.
8. The splitter of claim 7, wherein the sampling module further comprises:
the output end of the logic AND gate module is electrically connected with the communication module;
the analog-to-digital conversion module is provided with an overcurrent signal output end, the Hall current detection module is provided with an overcurrent signal output end, and the overcurrent signal output end of the analog-to-digital conversion module and the overcurrent signal output end of the Hall current detection module are respectively and electrically connected with the logic AND gate module;
the analog-to-digital conversion module is used for outputting a first overcurrent alarm signal through an overcurrent signal output end of the analog-to-digital conversion module when the voltage on the current sensing piece reaches a preset alarm voltage value;
the Hall current detection module is used for outputting a second overcurrent alarm signal through an overcurrent signal output end of the Hall current detection module when the intensity of a magnetic field generated by current flowing through the current sensing piece reaches a preset alarm intensity.
9. The shunt of any one of claims 1-8, further comprising:
the temperature detection module is electrically connected with the communication module and is used for detecting the temperature of the current sensing piece and outputting corresponding temperature detection signals to an external terminal through the communication module.
10. The shunt of any one of claims 2-8, wherein said shunt further comprises:
the temperature detection module is electrically connected with the analog-to-digital conversion module and is used for outputting a temperature detection signal of corresponding voltage according to the temperature of the current sensing piece;
the analog-to-digital conversion module is further configured to output the temperature detection signal to the communication module after analog-to-digital conversion, so as to output the temperature detection signal to an external terminal through the communication module.
11. The shunt of any one of claims 1-8, further comprising:
the storage module is used for storing preset calibration parameters and is provided with a second communication end used for accessing an external terminal; or,
the shunt further comprises:
the storage module is used for storing preset calibration parameters and is electrically connected with the communication module.
12. The shunt of any one of claims 1-8 or 11, further comprising: the electronic tag is arranged on the shunt.
13. The shunt of any one of claims 1-8, further comprising:
At least one sampling output; the sampling output end is electrically connected with the current sensing piece and used for being connected with an external terminal, and is used for sampling and outputting the voltage on the current sensing piece.
14. The shunt of claim 1, wherein said current sensing member comprises at least one current sensing resistor.
15. A new energy vehicle comprising a diverter as claimed in any one of claims 1 to 14.
16. An energy storage device comprising a shunt according to any one of claims 1-14.
CN202310696328.0A 2023-06-12 2023-06-12 Shunt, new energy automobile and energy storage equipment thereof Pending CN116735929A (en)

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