Current shunting monitoring sensor integrated with Hall element and detection method of current shunting monitoring sensor

Abstract

The invention relates to the technical field of current monitoring sensors, in particular to a Hall-integrated current shunt monitoring sensor and a detection method thereof. Comprising a shunt module and a Hall sensing module, the outer wall of the Hall sensing module is fixedly connected with the outer wall of the shunt module, the shunt module comprises a shunt current seat, the outer wall of the shunt current seat is fixedly connected with a shunt resistor disc, and a shunt acquisition line interface is arranged outside the shunt resistor disc; the Hall sensing module comprises a Hall element, the bottom of the Hall element is fixedly connected with a magnetic ring, and the inner wall of the Hall element is fixedly connected with a wiring segment through an amplifying circuit. Therefore, the sensor has the capability of monitoring two paths of currents, errors caused by defects of shunt monitoring and Hall sensing monitoring are made up, and the purpose of obtaining more accurate monitoring data is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of current monitoring sensors, and in particular to a Hall-integrated current shunt monitoring sensor and a detection method thereof. Background Art

[0002] With the rapid development of the new energy industry, passenger cars, commercial vehicles, industrial vehicles, two-wheeled vehicles, photovoltaics and other industries have increased their demand for lithium batteries. For lithium batteries, current sensors are extremely critical components.

[0003] In the prior art, the mainstream current sensors on the market are divided into two types: Hall effect current sensors and shunt resistor current monitors. These two current sensors each have their own advantages and disadvantages. The Hall effect current sensor requires the cable to pass through the magnetic ring; the problem of current zero drift is difficult to solve, resulting in poor accuracy of current measurement under the 1% range. The disadvantage of the shunt resistor current monitor is that overcurrent is prone to heat, so it is not easy to measure large currents. Summary of the invention

[0004] In view of the deficiencies in the prior art, the technical solution adopted by the present invention to solve the technical problems is: a current shunt monitoring sensor with integrated Hall, comprising: a shunt module, the shunt module is used to measure current; a Hall sensing module, the Hall sensing module is used to provide another current measurement method, the outer wall of the Hall sensing module is fixedly connected to the outer wall of the shunt module, and the shunt module and the Hall sensing module are integrated and processed, and a Hall coil is integrated on the basis of the shunt, so that the sensor has the ability to detect two currents. After the information of the two is synchronously aggregated to the battery management system, in terms of current strategy, the accuracy of small currents below 1% of the range is calculated based on the data of the resistor shunt, and the sensitive current detection of large currents is based on the average value of the current collection of the shunt and the Hall, thereby obtaining more accurate monitoring data.

[0005] Preferably, the shunt module includes a shunt current seat, the outer wall of the shunt current seat is fixedly connected to a shunt resistor, a shunt collection line interface is provided outside the shunt resistor, and the outer wall of the shunt collection line interface is fixedly connected to the inner wall of the shunt current seat.

[0006] Preferably, the Hall sensing module includes a Hall element, a magnetic ring is fixedly connected to the bottom of the Hall element, a wiring segment is fixedly connected to the inner wall of the Hall element through an amplifying circuit, and an outer wall of the magnetic ring is fixedly connected to one end of the shunt resistor away from the shunt current seat.

[0007] A detection method of a current shunt monitoring sensor integrated with Hall is used to detect a current shunt monitoring sensor integrated with Hall, comprising the following steps: Step 1: The battery management system collects the voltage drop data at both ends of the shunt collection line interface to analyze the current; Step 2: The shunt current seat is wrapped by the Hall sensor module, in which the magnetic ring passes around the shunt current seat. When the current passes through, the signal processing circuit in the Hall element converts the potential difference into a voltage signal, and performs amplification and filtering. Step 3: The Hall element outputs a voltage signal that is proportional to the current and is output to the battery management system through the wiring segment; Step 4: The battery management system receives the electrical signal from the Hall element and the electrical signal on the shunt module, and after the two signals are aggregated to the battery management system, the accuracy of small currents below 1% of the range is calculated based on the data of the resistor shunt, and the sensitive current detection of large currents is based on the average value of the collected data of the shunt module and the Hall sensing module.

[0008] The beneficial effects of the present invention are as follows: 1. The present invention integrates a shunt module and a Hall sensing module for integrated processing, and integrates a Hall coil on the basis of the shunt, so that the sensor has the ability to detect two currents. After the information of the two is synchronously summarized to the battery management system, the accuracy of small currents below 1% of the range is calculated based on the data of the resistor shunt in the current strategy, and the sensitive current detection of large currents is based on the current collection of the shunt and the Hall to take the average value. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a front view of the present invention; Figure 2 is a top view of the present invention; Figure 3 It is a side view of the present invention.

[0010] In the figure: 1. Shunt current seat; 2. Shunt resistor; 3. Shunt collection line interface; 4. Wiring segment; 5. Hall element; 6. Magnetic ring; 7. Shunt module; 8. Hall sensing module. DETAILED DESCRIPTION

[0011] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0012] Example: See Figure 1 - Figure 3 The present invention provides a technical solution: a current shunt monitoring sensor with integrated Hall, comprising: a shunt module 7, the shunt module 7 is used to measure current; a Hall sensing module 8, the Hall sensing module 8 is used to provide another current measurement method, and the outer wall of the Hall sensing module 8 is fixedly connected to the outer wall of the shunt module 7.

[0013] The shunt module 7 includes a shunt current seat 1, the outer wall of the shunt current seat 1 is fixedly connected to a shunt resistor 2, a shunt acquisition line interface 3 is arranged outside the shunt resistor 2, and the outer wall of the shunt acquisition line interface 3 is fixedly connected to the inner wall of the shunt current seat 1. When the current to be measured passes through the shunt module 7, the battery management system collects the voltage drop data at both ends of the shunt acquisition line interface 3 to analyze the current.

[0014] The Hall sensing module 8 includes a Hall element 5, a magnetic ring 6 is fixedly connected to the bottom of the Hall element 5, and a wiring segment 4 is fixedly connected to the inner wall of the Hall element 5 through an amplifying circuit. The outer wall of the magnetic ring 6 is fixedly connected to the end of the shunt resistor 2 away from the shunt current seat 1. The magnetic ring 6 is wrapped around the shunt current seat 1. When current passes through, the current is affected by the magnetic field of the magnetic ring 6, and the carriers in the current are affected by the magnetic field and then deflected, thereby generating a potential difference on both sides of the Hall element 5 in the Hall sensing module 8. This potential difference is proportional to the magnitude of the current. The signal processing circuit in the Hall element 5 will convert the potential difference into a voltage signal, and amplify it through the amplifying circuit inside the Hall element 5, and finally filter it, and finally output a voltage signal proportional to the current magnitude, which is then output to the battery management system through the wiring segment 4.

[0015] A detection method of a current shunt monitoring sensor integrated with Hall, comprising the following steps: Step 1: The battery management system collects the voltage drop data at both ends of the shunt collection line interface 3 to analyze the current; Step 2: The shunt current seat 1 is wrapped by the Hall sensor module 8, wherein the magnetic ring 6 is wound around the shunt current seat 1. When the current passes through, the signal processing circuit in the Hall element 5 converts the potential difference into a voltage signal, and performs amplification and filtering processing; Step 3: The Hall element 5 outputs a voltage signal proportional to the current and outputs it to the battery management system through the wiring segment 4; Step 4: The battery management system receives the electrical signal from the Hall element 5 and the electrical signal on the shunt module 7, and after the two signals are aggregated to the battery management system, the accuracy of small currents below 1% of the range is calculated based on the data of the resistor shunt 2, and the sensitive current detection of large currents is performed by taking the average value of the collected data of the shunt module 7 and the Hall sensing module 8.

[0016] Working principle: When in use, the current shunt monitoring sensor with integrated Hall is installed in the main circuit where the current needs to be measured. When the current to be measured passes through the shunt module 7, the battery management system collects the voltage drop data at both ends of the shunt collection line interface 3 to analyze the current. At the same time, the shunt current seat 1 is wrapped by the Hall sensing module 8, in which the magnetic ring 6 is wrapped around the shunt current seat 1. At this time, when current passes through, the current is affected by the magnetic field of the magnetic ring 6, and the carriers in the current are affected by the magnetic field and then deflected, thereby generating a potential difference on both sides of the Hall element 5 in the Hall sensing module 8. This potential difference is proportional to the magnitude of the current. The signal processing circuit in the Hall element 5 will convert the potential difference into a voltage signal, and amplify it through the amplification circuit inside the Hall element 5, and finally perform filtering processing, and finally output a voltage signal proportional to the current magnitude, which is then output to the battery management system through the wiring segment 4. The shunt module 7 inside the sensor obtains the electrical signal through the shunt resistor 2, and then outputs it through the shunt acquisition line interface 3, while the Hall sensing module 8 outputs the voltage signal converted from the potential difference through the wiring segment 4. When the two signals are summarized to the battery management system, the accuracy of small currents below 1% of the range is calculated in the current strategy, and the data of the resistor shunt is used as the standard. For sensitive current detection of large currents, the average value of the current acquisition values ​​of the shunt and the Hall is used to judge. By integrating the two current detection methods of Hall sensing current detection and shunt resistor, this current shunt monitoring sensor with integrated Hall naturally has two current detection loops, which can solve the need for dual-channel current detection of export detection, and at the same time optimizes the problem of zero drift of current below 1% of the Hall range, and makes up for the errors caused by the shortcomings of the two detection methods of Hall sensing current detection and shunt resistor detection, thereby making the detection data more accurate.

[0017] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A current shunt monitoring sensor with integrated Hall, characterized in that: include: A shunt module (7), the shunt module (7) being used to measure current; A Hall sensing module (8), the Hall sensing module (8) being used to provide another current measurement path, the outer wall of the Hall sensing module (8) being fixedly connected to the outer wall of the shunt module (7).

2. The current shunt monitoring sensor with integrated Hall according to claim 1, characterized in that: The shunt module (7) comprises a shunt current seat (1), the outer wall of the shunt current seat (1) is fixedly connected with a shunt resistor sheet (2), and the outside of the shunt resistor sheet (2) is provided with a shunt collection line interface (3).

3. The current shunt monitoring sensor with integrated Hall according to claim 2, characterized in that: The outer wall of the shunt collection line interface (3) is fixedly connected to the inner wall of the shunt current seat (1).

4. The current shunt monitoring sensor with integrated Hall according to claim 2, characterized in that: The Hall sensing module (8) comprises a Hall element (5), and a magnetic ring (6) is fixedly connected to the bottom of the Hall element (5).

5. The current shunt monitoring sensor with integrated Hall according to claim 4, characterized in that: The inner wall of the Hall element (5) is fixedly connected to a wiring segment (4) via an amplifying circuit, and the outer wall of the magnetic ring (6) is fixedly connected to an end of the shunt resistor sheet (2) away from the shunt current seat (1).

6. A detection method for a current shunt monitoring sensor integrated with Hall, used for using the current shunt monitoring sensor integrated with Hall in claims 1-5, characterized in that: The following steps are involved: Step 1: The battery management system collects voltage drop data at both ends of the shunt collection line interface (3) to analyze the current; Step 2: The shunt current seat (1) is wrapped by the Hall sensor module (8), wherein the magnetic ring (6) is wound around the shunt current seat (1). When current passes through, the signal processing circuit in the Hall element (5) converts the potential difference into a voltage signal, and performs amplification and filtering processing; Step 3: The Hall element (5) outputs a voltage signal proportional to the current and outputs it to the battery management system through the wiring segment (4); Step 4: The battery management system receives the electrical signal from the Hall element (5) and the electrical signal from the shunt module (7), and after the two signals are aggregated to the battery management system, the current strategy uses the data of the resistor shunt (2) to accurately measure the small current below 1% of the range, and the sensitive current detection of the large current uses the average value of the collected data of the shunt module (7) and the Hall sensing module (8).

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