Current detection system and vehicle

Abstract

A current detection system comprises a shunt used for detecting a first current signal of a battery, a Hall current sensor used for detecting a second current signal of the battery, a first signal compensation circuit, a second signal compensation circuit and a BMS connected with the battery. The shunt is provided with a first temperature sensor for detecting a first temperature signal; the Hall current sensor is provided with a second temperature sensor for detecting a second temperature signal; the first signal compensation circuit and the second signal compensation circuit respectively perform temperature compensation on the first current signal and the second current signal according to the first temperature signal and the second temperature signal and output a first detection current signal and a second detection current signal which are subjected to temperature compensation; and the BMS obtains the current of the battery according to the first detection current signal and the second detection current signal. Therefore, the influence of temperature change on the current detection precision is avoided, and when one detection element breaks down and the like, the electric vehicle can be subjected to power reduction limping.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and more specifically, to a system for detecting battery current, and a vehicle using the system. Background Technology

[0002] Currently, there are two main current acquisition schemes: one is shunt-based current detection, which offers excellent linearity. However, shunts use resistors with very low resistance, which changes significantly with temperature, directly affecting measurement accuracy. Besides temperature, the error in shunt-based current detection can also be affected by other factors, such as errors introduced by the detection line and thermoelectric potential. The other is Hall effect current sensor-based current detection. The output signal of a Hall effect current sensor is also affected by temperature, exhibiting temperature drift. Furthermore, the relationship between the Hall effect sensor's output signal and the magnetic field is not perfectly linear, resulting in nonlinear errors. Moreover, Hall effect current sensors are prone to failure. Using a shunt-based current sensor alone in a power battery results in poor current detection accuracy and inaccurate charge calculation. Using a Hall effect current sensor alone, if it malfunctions, experiences signal instability, or fails, it can prevent the power battery from discharging, causing the vehicle to malfunction and resulting in reduced power output, thus negatively impacting the user experience. Summary of the Invention

[0003] The purpose of this invention is to provide a current detection system that can avoid the impact of temperature changes on the accuracy of current detection during operation, and at the same time, enable electric vehicles to reduce power and limp in the event of any failure, unstable signal or failure of any current detection element.

[0004] This invention provides a current detection system, comprising: a Battery Management System (BMS), a shunt, a Hall current sensor, a first signal compensation circuit, and a second signal compensation circuit. The BMS is connected to the battery. The shunt is connected in series to the negative terminal of the battery and to the BMS. The shunt has a first temperature sensor for detecting its temperature. The Hall current sensor is coupled to the positive terminal of the battery and connected to the BMS. The Hall current sensor has a second temperature sensor for detecting the temperature of the Hall sensor. The first signal compensation circuit acquires a first current signal from the shunt and a first temperature signal from the first temperature sensor to correct the effect of temperature on the first current signal. The second signal compensation circuit acquires a second current signal from the Hall sensor and a second temperature signal from the second temperature sensor to correct the effect of temperature on the second current signal.

[0005] The current detection system provided by this utility model adds temperature compensation functions to the shunt and Hall current sensor respectively, and performs temperature compensation processing on the detected current signal, thereby avoiding the influence of temperature changes on the accuracy of current detection during operation; in addition, by using the shunt and Hall current sensor to detect the battery current at the same time, the battery current can still be detected even if one of the shunt or Hall current sensor fails, the signal is unstable or fails.

[0006] In one illustrative embodiment of the current detection system, a first signal compensation circuit is arranged on a shunt and connected to the shunt's resistor and a first temperature sensor. A second signal compensation circuit is arranged on a Hall current sensor and connected to both the Hall sensor and a second temperature sensor. The shunt also includes a first connector with multiple terminals, one terminal of which is connected to a BMS (Battery Management System) to transmit a temperature-corrected first detected current signal output from the first signal compensation circuit to the BMS. The Hall current sensor also includes a second connector with multiple terminals, one terminal of which is connected to the BMS to transmit a temperature-corrected second detected current signal output from the second signal compensation circuit to the BMS. The BMS obtains the battery current based on the first and second detected current signals. Thus, the BMS obtains the battery current.

[0007] In one example, the shunt also includes a first PCB board on which a first temperature sensor, a first connector, and a first signal compensation circuit are arranged. The first PCB board has a plurality of symmetrically arranged pin terminals, which are then fixed to the body of the resistor. The first signal compensation circuit obtains the voltage drop across the resistor through two of the symmetrically arranged pin terminals along the current flow direction, serving as the first current signal of the shunt. The first temperature sensor detects the temperature of the resistor, serving as the first temperature signal of the shunt. The BMS supplies power to the first temperature sensor and the first signal compensation circuit through the terminals of the first connector. This allows the battery current to be acquired.

[0008] In another example, the Hall current sensor also includes a second PCB board and a third PCB board. The Hall sensor and a second temperature sensor are arranged on the second PCB board. The second PCB board is positioned within a gap formed by the two opposing end faces of the Hall sensor's magnetic ring. A second signal compensation circuit and a second connector are arranged on the third PCB board. The second signal compensation circuit is connected to the Hall sensor and the second temperature sensor respectively via the terminals of the connector. The BMS supplies power to the second signal compensation circuit, the Hall sensor, and the second temperature sensor via the terminals of the second connector. This allows the battery current and the temperature of the Hall sensor to be acquired.

[0009] In another illustrative embodiment of the current detection system, both the first signal compensation circuit and the second signal compensation circuit are arranged within the BMS. The shunt also includes a first connector with multiple terminals connected to the BMS, allowing the BMS to acquire a first current signal and a first temperature signal through the first connector, and transmit the first current signal and the first temperature signal to the first signal compensation circuit, which outputs a temperature-corrected first detected current signal. The Hall current sensor also includes a second connector with multiple terminals connected to the BMS, allowing the BMS to acquire a second current signal and a second temperature signal through the second connector, and transmit the second current signal and the second temperature signal to the second signal compensation circuit, which outputs a temperature-corrected second detected current signal. The BMS obtains the battery current based on the first and second detected current signals. Thus, the BMS obtains the battery current.

[0010] In one example, the shunt also includes a first PCB board. A first temperature sensor and a first connector are arranged on the first PCB board. The first PCB board has a plurality of symmetrically arranged pin terminals, which are fixed to the body of the resistor in the shunt via the plurality of pin terminals. The BMS connects to two of the plurality of pin terminals symmetrically arranged along the current flow direction to obtain the voltage drop across the resistor, which serves as the first current signal of the shunt. The first temperature sensor detects the temperature of the resistor, which serves as the first temperature signal of the shunt. The BMS supplies power to the first temperature sensor through the terminals of the first connector. This allows the battery current to be acquired.

[0011] In another example, the Hall current sensor also includes a second PCB board. The Hall sensor, the second temperature sensor, and the second connector are arranged on the second PCB board. The second PCB board is positioned within a gap formed by the two facing end surfaces of the Hall sensor's magnetic ring. The BMS powers the Hall sensor and the second temperature sensor through the terminals of the second connector. This allows for the acquisition of battery current and the temperature of the Hall sensor.

[0012] In another illustrative embodiment of the current detection system, the BMS issues an alarm signal if it fails to receive either the first detection current signal or the second detection current signal.

[0013] This utility model also discloses a vehicle, including a power battery, the aforementioned current detection system, and a vehicle controller. When the BMS fails to receive either the first detection current signal or the second detection current signal, it sends an alarm signal to the vehicle controller. Upon receiving the alarm signal, the vehicle controller controls the vehicle to operate at reduced power.

[0014] The current detection system provided by this utility model adds temperature compensation functions to the shunt and Hall current sensor respectively, and performs temperature compensation processing on the detected current signal, thereby avoiding the influence of temperature changes on the accuracy of current detection during operation. In addition, by using the shunt and Hall current sensor to detect the battery current simultaneously, the battery current can still be detected even if one of the shunt or Hall current sensor fails, has an unstable signal, or is ineffective. For example, this current detection system can be applied to the current detection of the power battery of electric vehicles. If one of the shunt or Hall current sensor fails, has an unstable signal, or is ineffective, the power battery discharge can be prevented, causing the vehicle to be unable to move, so that the electric vehicle can reduce power and limp, thereby avoiding the vehicle breaking down. Attached Figure Description

[0015] The following figures are for illustrative purposes only and do not limit the scope of the present invention.

[0016] Figure 1 A schematic block diagram of a current detection system according to an illustrative embodiment of the present invention is shown.

[0017] Figure 2 A schematic structural diagram of a shunt according to an illustrative embodiment of the present invention is shown.

[0018] Figure 3 A schematic block diagram of a Hall current sensor according to an illustrative embodiment of the present invention is shown.

[0019] Figure 4 A schematic block diagram of a current detection system according to another illustrative embodiment of the present invention is shown.

[0020] Figure 5 A schematic structural diagram of a shunt according to another illustrative embodiment of the present invention is shown.

[0021] Label Explanation

[0022] 130, 230 splitters

[0023] 131 and 231 resistors

[0024] 132, 232 metal terminals

[0025] 133 and 233 welds

[0026] 134, 234 mounting holes

[0027] 135, 235 First PCB Board

[0028] 136, 236 pin terminal

[0029] 137, 237 First temperature sensor

[0030] 138, 238 First Connector

[0031] 150, 250 Hall current sensors

[0032] 151 and 251 magnetic rings

[0033] 152, 252 coils

[0034] 153, 253 Second PCB Board

[0035] 154, 254 Hall sensors

[0036] 155, 255 Second Temperature Sensor

[0037] 156 Third PCB Board

[0038] 158, 258 Second Connector

[0039] 300 batteries

[0040] 400 BMS

[0041] 500 First signal compensation circuit

[0042] 600 Second Signal Compensation Circuit

[0043] 700 communication interface

[0044] 800 fuse

[0045] 900 load Detailed Implementation

[0046] To provide a clearer understanding of the technical features, objectives, and effects of the invention, specific embodiments of the present invention are now described with reference to the accompanying drawings. In the drawings, the same reference numerals indicate components with the same or similar structures but the same function.

[0047] In this document, “illustrative” means “serving as an example, illustration or description”, and any illustration or implementation described herein as “illustrative” should not be construed as a more preferred or advantageous technical solution.

[0048] In this document, terms such as "first" and "second" do not indicate their importance or order, but are only used to distinguish them to facilitate the description of the document.

[0049] To keep the drawings simple, each drawing only schematically shows the parts related to this utility model, and they do not represent the actual structure of the product.

[0050] Figure 1 A schematic block diagram of a current detection system according to an illustrative embodiment of the present invention is shown. Figure 1 As shown, the current detection system includes a BMS 400, a shunt 130, a Hall current sensor 150, a first signal compensation circuit 500, and a second signal compensation circuit 600. The BMS 400 is connected to the battery 300. The shunt 130 is connected in series to the negative terminal of the battery 300 and is also connected to the BMS 400. The shunt 130 has a first temperature sensor 137 for detecting the temperature of the shunt 130. For example, the first temperature sensor 137 can be, but is not limited to, an NTC thermistor, a diode, a PT200, an IC temperature sensor, or a thermocouple. The Hall current sensor 150 is coupled to the positive terminal of the battery 300 and is connected to the BMS 400. The Hall current sensor 150 has a second temperature sensor 155 for detecting the temperature of the Hall sensor 154 of the Hall current sensor 150. The second temperature sensor 155 can be, but is not limited to, an NTC thermistor, a diode, a PT200, an IC temperature sensor, or a thermocouple.

[0051] The first signal compensation circuit 500 is used to acquire the first current signal from the shunt 130 and the first temperature signal from the first temperature sensor 137, to correct the effect of temperature on the first current signal and output a temperature-corrected first detection current signal. The second signal compensation circuit 600 is used to acquire the second current signal from the Hall sensor 154 and the second temperature signal from the second temperature sensor 155, to correct the effect of temperature on the second current signal and output a temperature-corrected second detection current signal. The BMS 400 obtains the current of the battery 300 based on the first and second detection current signals.

[0052] This current detection system adds temperature compensation to both the shunt and the Hall current sensor to process the detected current signal, thereby avoiding the impact of temperature changes on the accuracy of current detection during operation. In addition, by using both the shunt and the Hall current sensor to detect the battery current, the system can still detect the battery current even if one of the shunt or the Hall current sensor fails, has an unstable signal, or is ineffective.

[0053] like Figure 1 As shown, the BMS 400 is connected to a communication interface 700, such as a CAN communication interface or a wireless communication interface, for communicating with vehicle controllers such as the vehicle controller. A load 900 is connected between the shunt 130 and the Hall current sensor 150. A fuse 800 is connected between the load 900 and the Hall current sensor 150 to provide overload or overcurrent protection.

[0054] In one example of a current sensing system, such as Figure 1 As shown, a first signal compensation circuit 500 is arranged on a shunt 130 and connected to a resistor 131 of the shunt 130 and a first temperature sensor 137. The resistor 131 can be, for example, an alloy resistor, but is not limited thereto. The shunt 130 also includes a first connector 138. The first connector 138 has multiple terminals, such as pin terminals, one of which is connected to a BMS 400, for example, to a terminal of the BMS 400 (not shown), transmitting the temperature-corrected first detection current signal output by the first signal compensation circuit 500 to the BMS 400. A second signal compensation circuit 600 is arranged on a Hall current sensor 150 and connected to a Hall sensor 154 and a second temperature sensor 155. The Hall current sensor 150 also includes a second connector 158. The second connector 158 has multiple terminals, such as pin terminals, one of which is connected to the BMS 400, for example, to a terminal of the BMS 400 (not shown), transmitting the second detected current signal output by the second signal compensation circuit 600 to the BMS 400. The BMS 400 obtains the current of the battery 300 based on the first and second detected current signals. Thus, the BMS obtains the battery current.

[0055] Figure 2 A schematic structural diagram of a shunt according to an exemplary embodiment of the present invention is shown. Figure 2 As shown, in one schematic embodiment of the shunt, the shunt 130 further includes two metal terminals 132. The two sides of the resistor 131 body are respectively welded to the metal terminals 132 to form weld seams 133. Each metal terminal 132 has a mounting hole 134 for connecting wires.

[0056] The shunt 130 also includes a first PCB board 135. A first temperature sensor 137, a first connector 138, and a first signal compensation circuit 500 are arranged on the first PCB board 135. The first PCB board 135 has a plurality of symmetrically arranged pin terminals 136, which are fixed to the body of the resistor 131. This solves the problems of inconvenient wiring and loosening / oxidation of the bolts in the shunt. The first signal compensation circuit 500 obtains the voltage drop of the resistor 131 through two of the pin terminals 136 symmetrically arranged along the current flow direction, serving as the first current signal of the shunt 130. The first temperature sensor 137 detects the temperature of the resistor 131, serving as the first temperature signal of the shunt 130. Figure 1 and Figure 2As shown, the BMS 400 supplies power to the first temperature sensor 137 and the first signal compensation circuit 500 through the terminals of the first connector 138. This allows the battery current to be collected.

[0057] Figure 3 A schematic block diagram of a Hall current sensor according to an illustrative embodiment of the present invention is shown. Figure 3 As shown, in a schematic embodiment of the Hall sensor, the Hall current sensor 150 includes a magnetic ring 151 and a coil 152 wound around the magnetic ring 151, as... Figure 1 and Figure 3 As shown, the BMS 400 supplies power to the coil 152 via the second connector 158. The Hall current sensor 150 also includes a second PCB board 153 and a third PCB board 156. The Hall sensor 154 and the second temperature sensor 155 are arranged on the second PCB board 153. The second PCB board 153 is positioned within the gap formed by the two opposing end faces of the magnetic ring 151 of the Hall sensor 154. The second signal compensation circuit 600 and the second connector 158 are arranged on the third PCB board 156. The second signal compensation circuit 600 is connected to the Hall sensor 154 and the second temperature sensor 155 respectively via the terminals of the second connector 158. Figure 1 and Figure 3 As shown, the BMS 400 supplies power to the second signal compensation circuit 600, the Hall sensor 154, and the second temperature sensor 155 via the terminals of connector 158. This allows for the acquisition of battery current and the temperature from the Hall sensor.

[0058] Figure 4 A schematic block diagram of a current detection system according to another illustrative embodiment of the present invention is shown. Figure 4 As shown, in this embodiment, the current detection system includes a battery management system (BMS) 400, a shunt 230, a Hall current sensor 250, a first signal compensation circuit 500, and a second signal compensation circuit 600. The BMS 400 is connected to the battery 300. The shunt 230 is connected in series to the negative terminal of the battery 300 and is also connected to the BMS 400. The shunt 230 has a first temperature sensor 237 for detecting the temperature of the shunt 230. The Hall current sensor 250 is coupled to the positive terminal of the battery 300 and is also connected to the BMS 400. The Hall current sensor 250 has a second temperature sensor 255 for detecting the temperature of its Hall sensor 254.

[0059] like Figure 4As shown, the first signal compensation circuit 500 is used to acquire the first current signal of the shunt 230 and the first temperature signal of the first temperature sensor 237 to correct the influence of temperature on the first current signal and output a temperature-corrected first detection current signal. The second signal compensation circuit 600 is used to acquire the second current signal of the Hall sensor 254 and the second temperature signal of the second temperature sensor 255 to correct the influence of temperature on the second current signal and output a temperature-corrected second detection current signal. The BMS 400 obtains the current of the battery 300 based on the first and second detection current signals.

[0060] like Figure 4 As shown, in one example, both the first signal compensation circuit 500 and the second signal compensation circuit 600 are arranged within the BMS 400. The first signal compensation circuit 500 and the second signal compensation circuit 600 can be two separate chips or integrated on the same chip. The shunt 230 also includes a first connector 238. The first connector 238 has multiple terminals, such as pin terminals, for connecting to the BMS 400. For example, by connecting the terminals of the first connector 238 to the terminals (not shown) of the BMS 400, the BMS 400 can acquire a first current signal and a first temperature signal through the first connector 238 and transmit the first current signal and the first temperature signal to the first signal compensation circuit 500. The first signal compensation circuit 500 outputs a temperature-corrected first detection current signal. The Hall current sensor 250 also includes a second connector 258 having multiple terminals, such as pin terminals, for connection to the BMS 400. For example, by connecting the terminals of the first connector 238 to the terminals of the BMS 400 (not shown), the BMS 400 can acquire a second current signal and a second temperature signal through the second connector 258, and transmit the second current signal and the second temperature signal to the second signal compensation circuit 600. The second signal compensation circuit 600 outputs a temperature-corrected second detection current signal. The BMS 400 obtains the current of the battery 300 based on the first detection current signal and the second detection current signal.

[0061] like Figure 4As shown, the Hall current sensor 250 includes a magnetic ring 251 and a coil 252 wound around the magnetic ring 251. The BMS 400 supplies power to the coil 252. The Hall current sensor 250 also includes a second PCB board 253. The Hall sensor 254, the second temperature sensor 255, and the second connector 258 are arranged on the second PCB board 253, which is placed within the gap formed by the two facing end surfaces of the magnetic ring 251 of the Hall sensor 254. The BMS 400 supplies power to the Hall sensor 254 and the second temperature sensor 255 through the second contact 258. This allows for the acquisition of battery current and the temperature of the Hall sensors.

[0062] Figure 5 A schematic structural diagram of a shunt according to another illustrative embodiment of the present invention is shown. For example... Figure 5 As shown, in one example, the shunt 230 further includes a resistor 231 and two metal terminals 232. The two sides of the resistor 231 are welded to the metal terminals 232, forming weld seams 233. Each metal terminal 232 has mounting holes 234 for connecting wires. The shunt 230 also includes a first PCB board 235. A first temperature sensor 237 and a first connector 238 are arranged on the first PCB board 235. The first PCB board 235 has a plurality of symmetrically arranged pin terminals 236, which are fixed to the resistor 231. The BMS 400 connects to two of the symmetrically arranged pin terminals 236 along the current flow direction to obtain the voltage drop across the resistor 231, serving as the first current signal of the shunt 230. The first temperature sensor 237 detects the temperature of the resistor 231, serving as the first temperature signal of the shunt 230. The BMS 400 supplies power to the first temperature sensor 237 through the terminals of the first connector 238. This allows the battery's current to be collected.

[0063] In one illustrative embodiment of the current detection system, the BMS 400 issues an alarm signal if it fails to receive either a first detection current signal or a second detection current signal. For example, the alarm signal is sent via the communication interface 700, thereby alerting the user.

[0064] This utility model also provides a vehicle, including a power battery 300, the aforementioned current detection system, and a vehicle controller. When the BMS400 fails to receive either the first detection current signal or the second detection current signal, it sends an alarm signal to the vehicle controller. Upon receiving the alarm signal, the vehicle controller controls the vehicle to operate at reduced power.

[0065] The current detection system provided by this invention adds temperature compensation functions to both the shunt and the Hall current sensor, performing temperature compensation processing on the detected current signal to avoid the impact of temperature changes on the accuracy of current detection during operation. Furthermore, by simultaneously using the shunt and the Hall current sensor to detect the battery current, the system can still detect the battery current even if one of the shunt or the Hall current sensor malfunctions, has an unstable signal, or fails. For example, this current detection system can be applied to the current detection of electric vehicle power batteries. If either the shunt or the Hall current sensor malfunctions, has an unstable signal, or fails, it can prevent the power battery from discharging, thus preventing the vehicle from moving and allowing the electric vehicle to reduce power and limp, thereby avoiding breakdowns. The current detection system provided by this invention can also be applied to other applications requiring current detection.

[0066] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present utility model, and are not intended to limit the scope of protection of the present utility model. All equivalent implementation schemes or modifications made without departing from the spirit of the present utility model, such as combinations, divisions or repetitions of features, should be included within the scope of protection of the present utility model.

Claims

1. A current detection system, characterized in that, The current detection system includes: A BMS (400) is connected to a battery (300); A shunt (130, 230) is connected in series to the negative terminal side of the battery (300) and to the BMS (400). The shunt (130, 230) has a first temperature sensor (137, 237) for detecting the temperature of the shunt (130, 230). A Hall current sensor (150, 250) is coupled to the positive side of the battery (300) and connected to the BMS (400). The Hall current sensor (150, 250) has a second temperature sensor (155, 255) for detecting the temperature of the Hall sensor (154, 254) of the Hall current sensor (150, 250). A first signal compensation circuit (500) is used to acquire a first current signal from the shunt (130, 230) and a first temperature signal from the first temperature sensor (137, 237) to correct the effect of temperature on the first current signal; and A second signal compensation circuit (600) is used to acquire the second current signal of the Hall sensor (154, 254) and the second temperature signal of the second temperature sensor (155, 255) to correct the effect of temperature on the second current signal.

2. The current detection system as described in claim 1, characterized in that, The first signal compensation circuit (500) is arranged on the shunt (130) and connected to the resistor (131) of the shunt (130) and the first temperature sensor (137). The shunt (130) further includes: A first connector (138) having multiple terminals, one of which is connected to the BMS (400) to transmit the temperature-corrected first detection current signal output by the first signal compensation circuit (500) to the BMS (400). The second signal compensation circuit (600) is arranged on the Hall current sensor (150) and connected to the Hall sensor (154) and the second temperature sensor (155). The Hall current sensor (150) further includes: A second connector (158) having multiple terminals, one of which is connected to the BMS (400) to transmit the temperature-corrected second detection current signal output by the second signal compensation circuit (600) to the BMS (400). The BMS (400) obtains the current of the battery (300) based on the first detection current signal and the second detection current signal.

3. The current detection system as described in claim 2, characterized in that, The splitter (130) also includes: A first PCB board (135) is provided, on which the first temperature sensor (137), the first connector (138), and the first signal compensation circuit (500) are arranged. The first PCB board (135) has a plurality of symmetrically arranged pin terminals (136) and is fixed to the body of the resistor (131) through the plurality of pin terminals (136). The first signal compensation circuit (500) obtains the voltage drop of the resistor (131) through two of the plurality of pin terminals (136) symmetrically arranged along the current flow direction, as the first current signal of the shunt (130). The first temperature sensor (137) detects the temperature of the resistor (131) as the first temperature signal of the shunt (130). The BMS (400) supplies power to the first temperature sensor (137) and the first signal compensation circuit (500) through the terminals of the first connector (138).

4. The current detection system as described in claim 2, characterized in that, The Hall current sensor (150) also includes: A second PCB board (153) is provided, on which the Hall sensor (154) and the second temperature sensor (155) are arranged. The second PCB board (153) is placed within the gap formed between the two opposing end faces of the magnetic ring (151) of the Hall sensor (154). A third PCB board (156) is provided on the third PCB board (156), the second signal compensation circuit (600) and the second connector (158) are arranged on the third PCB board (156), the second signal compensation circuit (600) is connected to the Hall sensor (154) and the second temperature sensor (155) respectively through the terminals of the connector (158); the BMS (400) supplies power to the second signal compensation circuit (600), the Hall sensor (154) and the second temperature sensor (155) through the terminals of the second connector (158).

5. The current detection system as described in claim 1, characterized in that, Both the first signal compensation circuit (500) and the second signal compensation circuit (600) are arranged within the BMS (400). The shunt (230) also includes a first connector (238) having multiple terminals connected to the BMS (400), so that the BMS (400) can acquire the first current signal and the first temperature signal through the first connector (238) and transmit the first current signal and the first temperature signal to the first signal compensation circuit (500), and the first signal compensation circuit (500) outputs the first detection current signal after temperature correction; The Hall current sensor (250) also includes a second connector (258) having multiple terminals connected to the BMS (400), so that the BMS (400) can acquire the second current signal and the second temperature signal through the second connector (258) and transmit the second current signal and the second temperature signal to the second signal compensation circuit (600), and the second signal compensation circuit (600) outputs the second detection current signal after temperature correction; The BMS (400) obtains the current of the battery (300) based on the first detection current signal and the second detection current signal.

6. The current detection system as described in claim 5, characterized in that, The splitter (230) also includes: A first PCB board (235) is provided, on which the first temperature sensor (237) and the first connector (238) are arranged. The first PCB board (235) has a plurality of pin terminals (236) arranged symmetrically and is fixed to the body of the resistor (231) of the shunt (230) through the plurality of pin terminals (236). The BMS (400) obtains the voltage drop of the resistor (231) through two of the plurality of pin terminals (236) arranged symmetrically along the current flow direction, as the first current signal of the shunt (230). The first temperature sensor (237) detects the temperature of the resistor (231), as the first temperature signal of the shunt (230). The BMS (400) supplies power to the first temperature sensor (237) through the terminals of the first connector (238).

7. The current detection system as described in claim 5, characterized in that, The Hall current sensor (250) also includes: A second PCB board (253) is provided on which the Hall sensor (254), the second temperature sensor (255) and the second connector (258) are arranged. The second PCB board (253) is placed within the gap formed between the two end surfaces of the magnetic ring (251) of the Hall sensor (254) facing each other. The BMS (400) supplies power to the Hall sensor (254) and the second temperature sensor (255) through the terminals of the second connector (258).

8. The current detection system as described in any one of claims 2 to 7, characterized in that, If the BMS (400) does not receive either the first detection current signal or the second detection current signal, it will issue an alarm signal.

9. A vehicle, characterized in that, The vehicle includes: Battery (300). The current detection system as described in any one of claims 1 to 8, and Vehicle controller The BMS (400) of the current detection system is connected to the battery (300). When the BMS (400) does not receive either the first detection current signal or the second detection current signal, it sends an alarm signal to the vehicle controller. After receiving the alarm signal, the vehicle controller controls the vehicle to reduce power for driving.

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