Current detection device and system

Abstract

The utility model discloses a current detection device and system, and relates to the technical field of information detection, the current detection device comprises a household electrical appliance to be detected, an information detection module and an information processing module, and the information processing module is used for detecting the household electrical appliance to be detected based on the detection requirement of the household electrical appliance to be detected. Determining a target connection mode of the to-be-detected household electrical appliance and the information detection module; the information detection module is used for acquiring initial detection information of the to-be-detected household electrical appliance after the to-be-detected household electrical appliance and the information detection module are connected based on the target connection mode, and processing the initial detection information to obtain intermediate detection information; and the information processing module is also used for determining a detection result of the to-be-detected household electrical appliance according to the intermediate detection information and the detection demand, and processing the intermediate detection information when the detection result indicates that the to-be-detected household electrical appliance operates normally to obtain target detection information. According to the utility model, the detection cost and detection difficulty of household appliance current information can be reduced, and the detection efficiency of the current information is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to information detection technical field especially, relate to a current detection device and system. BACKGROUND

[0002] With the development of science and technology and the improvement of the living standard of residents, household appliances fully participate in the daily life of residents, and the safety performance of household appliances is also a problem that residents and researchers pay close attention to.

[0003] The detection of charging and discharging current can not only evaluate the battery performance of household appliances, but also find aging batteries or potential faults in household appliances, and the safety of household appliances in use can be determined by detecting the charging and discharging current of household appliances, so as to avoid electrical fires or electric shock accidents caused by abnormal current. At present, the current information of household appliances is determined by external detection equipment, but the current characteristics of the charging and discharging process of different household appliances are different, and the current range of the charging and discharging process of the same household appliance is also different, so the tester needs to connect different test equipment according to the current characteristics and charging and discharging process of the household appliance, which is complex to operate, low in current detection efficiency and high in detection cost.

[0004] Therefore, how to detect the current of household appliances at low cost, simply, high efficiency and high accuracy is a problem to be solved at present. UTILITY MODEL CONTENTS

[0005] The utility model provides a kind of current detection equipment and system, design a kind of detection equipment with the ability of measuring large current information, small current information, charging current information and discharging current information, reduce the detection cost and the difficulty of detection work of household appliance current information, improve detection efficiency.

[0006] According to an aspect of the utility model, a kind of current detection equipment is provided, and the equipment includes: to be detected household appliance, information detection module and information processing module, wherein, information detection module is connected to be detected household appliance and information processing module respectively;

[0007] Information processing module is used to determine the target connection mode of to be detected household appliance and information detection module based on the detection requirement of to be detected household appliance;

[0008] Information detection module is used to obtain the initial detection information of to be detected household appliance after to be detected household appliance and information detection module are connected based on target connection mode, and the intermediate detection information is obtained by processing initial detection information;

[0009] The information processing module is also used to receive intermediate detection information sent by the information detection module, determine the detection result of the household appliance to be tested based on the intermediate detection information and detection requirements, and process the intermediate detection information to obtain the target detection information when the detection result indicates that the household appliance to be tested is operating normally.

[0010] Optionally, the initial and intermediate detection information are voltage information, and the target detection information is current information.

[0011] Optionally, the information detection module includes a detection unit, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first detection port, and a second detection port; wherein, the first end of the detection unit is connected to the first end of the first resistor and the first end of the second resistor respectively, the second end of the first resistor is connected to an electrical signal, the second end of the second resistor is connected to the second end of the detection unit and a ground signal respectively, the third end of the detection unit is connected to the first end of the first capacitor, the first end of the second capacitor and the electrical signal respectively, the second end of the first capacitor is connected to the second end of the second capacitor and a ground signal respectively, the fourth end of the detection unit is connected to the first end of the third resistor and the first end of the third capacitor respectively, the second end of the third resistor is connected to the first detection port, the second end of the third capacitor is connected to a ground signal, the fifth end of the detection unit is connected to the first end of the fourth resistor and the first end of the fourth capacitor respectively, the second end of the fourth resistor is connected to the second detection port, the second end of the fourth capacitor is connected to a ground signal, the sixth end of the detection unit is connected to the first end of the fifth resistor, the second end of the fifth resistor is connected to the first end of the fifth capacitor and the information processing module respectively, and the second end of the fifth capacitor is connected to a ground signal.

[0012] Optionally, the household appliance to be tested includes a sampling resistor, wherein the second end of the sampling resistor is connected to the positive terminal of the battery of the household appliance to be tested, and the first end of the sampling resistor is connected to the battery signal terminal of the household appliance to be tested.

[0013] Optionally, the detection requirement can be a charging detection requirement, a discharging detection requirement, or a bidirectional current detection requirement. When the detection requirement is a charging detection requirement, the first detection port is connected to the first end of the sampling resistor, the second detection port is connected to the second end of the sampling resistor, and the voltage information at the first end of the detection unit is controlled to be a ground signal. When the detection requirement is a discharging detection requirement, the first detection port is connected to the second end of the sampling resistor, the second detection port is connected to the first end of the sampling resistor, and the voltage information at the first end of the detection unit is controlled to be a ground signal. When the detection requirement is a bidirectional current detection requirement, the first detection port is connected to the first end of the sampling resistor, the second detection port is connected to the second end of the sampling resistor, and the voltage information at the first end of the detection unit is controlled to be a reference voltage.

[0014] Optionally, the information detection module is specifically used to: amplify the voltage information of the initial detection information by a preset factor to obtain intermediate detection information.

[0015] Optionally, the intermediate detection information can be charging intermediate detection information or discharging intermediate detection information; when the household appliance under test is charging, the charging intermediate detection information V1 = Vf - A*I*Rs, and when the household appliance under test is discharging, the discharging intermediate detection information V2 = Vf + A*I*Rs; where the charging intermediate detection information or discharging intermediate detection information is the output voltage of the sixth terminal of the detection unit, Vf represents the reference voltage, A represents the voltage amplification factor of the information detection module, I represents the current flowing through the sampling resistor, and Rs represents the resistance value of the sampling resistor.

[0016] Optionally, the information processing module is specifically used to: determine the normal voltage range of the household appliance to be tested based on the testing requirements; determine that the household appliance to be tested is operating normally when the voltage information of the intermediate testing information is within the normal voltage range; and determine that the household appliance to be tested has an abnormal current when the voltage information of the intermediate testing information exceeds the normal voltage range.

[0017] Optionally, the information processing module is specifically used to: when the household appliance to be tested is operating normally, convert the voltage information of the intermediate detection information to obtain the current information corresponding to the voltage information of the intermediate detection information, and determine the converted current information as the target detection information.

[0018] According to another aspect of the present invention, a current detection system is provided, which includes any one of the current detection devices of the present invention.

[0019] The current detection device of this utility model includes: a household appliance to be tested, an information detection module, and an information processing module. The information detection module is connected to both the household appliance to be tested and the information processing module. The information processing module is used to determine the target connection method between the household appliance to be tested and the information detection module based on the testing requirements of the household appliance to be tested. After the household appliance to be tested and the information detection module are connected according to the target connection method, the information detection module is used to acquire the initial detection information of the household appliance to be tested and process the initial detection information to obtain intermediate detection information. The information processing module is also used to receive the intermediate detection information sent by the information detection module, determine the testing result of the household appliance to be tested based on the intermediate detection information and the testing requirements, and process the intermediate detection information to obtain the target detection information when the testing result indicates that the household appliance to be tested is operating normally. This invention provides a device capable of measuring high-current, low-current, charging current, and discharging current information of a household appliance under test. For example, it determines the connection method and normal voltage range between the appliance and the information detection module based on the appliance's testing requirements. By combining the normal voltage range with voltage information from intermediate detection data, it determines whether the appliance exhibits current anomalies. When the appliance is operating normally, it converts the intermediate detection data to obtain the appliance's current information. This approach enables the detection of different types of current information and further assesses the appliance's operating status, ensuring its safety. It reduces the cost and difficulty of current information detection, and improves the efficiency of current information and appliance safety testing. It also solves the problems of different appliances having different current characteristics during charging and discharging, and even the same appliance having different current ranges during charging and discharging. Previously, testing required personnel to connect different testing devices based on the appliance's current characteristics and charging / discharging process, resulting in complex operation, low current detection efficiency, and high testing costs.

[0020] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of a current detection device provided by this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of a household appliance to be tested provided by this utility model;

[0024] Figure 3 This is a structural schematic diagram of an information detection module provided by this utility model.

[0025] Figure label:

[0026] 1-Home appliance to be tested, 11-Battery interface, 2-Information detection module, 21-Detection unit, 22-First detection port, 23-Second detection port, 3-Information processing module. Detailed Implementation

[0027] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0028] It should be noted that the terms "first," "second," "intermediate," "initial," "target," "candidate," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0029] Figure 1 This is a structural schematic diagram of an information warning device for a substation provided by this utility model, used to adaptively measure the current information of different household appliances or household appliances in different operating states. (Reference) Figure 1 The device specifically includes: a household appliance to be tested 1, an information detection module 2, and an information processing module 3, wherein the information detection module 2 is connected to both the household appliance to be tested 1 and the information processing module 3.

[0030] The information processing module can be understood as a component with data parsing and processing capabilities, including but not limited to microprocessor units, programmable logic controllers, and microcontrollers. It is used to determine the target connection method between the household appliance under test and the information detection module based on the detection requirements of the appliance. The household appliance under test can be understood as an appliance with current detection requirements. These requirements indicate the current type of the appliance's battery, including but not limited to charging current and discharging current. The target connection method can be understood as the signal acquisition method most suitable for collecting the current information of the appliance under test; that is, how the information detection module connects to the appliance. The specific connection method is related to the current type of the appliance's battery and the specific signal acquisition logic, and this invention does not limit this aspect.

[0031] The information detection module can be understood as a circuit that detects current and / or voltage signals, performs interference filtering and signal amplification. The specific amplification factor depends on the parameters of the components used in the information detection module and the circuit design. This module is used to acquire the initial detection information of the household appliance under test after the household appliance and the information detection module are connected according to the target connection method, and then processes the initial detection information to obtain intermediate detection information. The initial detection information can be understood as the signal directly collected by the information detection module from the household appliance under test, and the household appliance under test can be understood as the initial detection information after filtering and amplification.

[0032] The information processing module also receives intermediate detection information from the information detection module. Based on this intermediate detection information and the detection requirements, it determines the detection result of the household appliance under test. When the detection result indicates that the appliance is operating normally, it processes the intermediate detection information to obtain the target detection information. The target detection information can be understood as the current information of the appliance under test. When the detection result indicates an abnormal current in the appliance, it stops calculating the current information, directly generates an abnormality warning, and sends an abnormality report to pre-set user devices to prompt the user to handle the appliance malfunction and ensure the safety of both the user and the appliance.

[0033] The household appliance to be tested in this utility model includes a sampling resistor. Figure 2 This utility model provides a structural schematic diagram of a household appliance to be tested, mainly a circuit structure diagram of the battery interface. Figure 2 VCC-BAT in the diagram represents the battery signal terminal, i.e., the electrical signal output terminal of the battery. The sixth terminal of the battery connector 11 represents the positive terminal of the battery. VCC-3V3 represents the electrical signal. GND represents the ground signal. A2 represents the second terminal of the sampling resistor Rs. A1 represents the first terminal of the sampling resistor Rs. NTC-detect is an output signal that connects to other functional modules of the household appliance to be tested.

[0034] from Figure 2 As can be seen, the second end of the sampling resistor is connected to the positive terminal of the battery of the household appliance to be tested, and the first end of the sampling resistor is connected to the signal terminal of the battery of the household appliance to be tested. The information to be collected by this utility model can be understood as the current value flowing through the sampling resistor Rs.

[0035] Figure 3 This is a structural schematic diagram of an information detection module provided by this utility model. Figure 3 As can be seen, the information detection module 2 includes a detection unit 21, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a first capacitor C1, a second capacitor C2, a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a first detection port 22, and a second detection port 23. Similarly, VCC-3V3 represents the electrical signal, GND represents the ground signal, and the numbers next to the chip indicate the chip's port number. The port numbers of components such as capacitors and resistors are not shown in the figure.

[0036] Specifically, the first terminal of the detection unit is connected to the first terminal of the first resistor and the first terminal of the second resistor, respectively. The second terminal of the first resistor is connected to an electrical signal. The second terminal of the second resistor is connected to the second terminal of the detection unit and a ground signal. The third terminal of the detection unit is connected to the first terminal of the first capacitor, the first terminal of the second capacitor, and an electrical signal, respectively. The second terminal of the first capacitor is connected to the second terminal of the second capacitor and a ground signal, respectively. The fourth terminal of the detection unit is connected to the first terminal of the third resistor and the first terminal of the third capacitor, respectively. The second terminal of the third resistor is connected to the first detection port, and the second terminal of the third capacitor is connected to a ground signal, respectively. The fifth terminal of the detection unit is connected to the first terminal of the fourth resistor and the first terminal of the fourth capacitor, respectively. The second terminal of the fourth resistor is connected to the second detection port, and the second terminal of the fourth capacitor is connected to a ground signal, respectively. The sixth terminal of the detection unit is connected to the first terminal of the fifth resistor, respectively. The second terminal of the fifth resistor is connected to the first terminal of the fifth capacitor and the information processing module, respectively. The second terminal of the fifth capacitor is connected to a ground signal, respectively.

[0037] The detection unit can be an SGM8199 series chip. This series of chips has a fixed amplification factor, such as 20x or 10x. The amplification factor is related to the specific chip selection. This invention uses the SGM8199A0 as the current detection chip, which has an amplification factor of 20x. The information detection module is specifically used to amplify the voltage information of the initial detection by a preset factor to obtain intermediate detection information. This amplification function can be implemented using an SGM8199 series chip.

[0038] During signal acquisition, the fourth and fifth terminals (pin 4 and pin 5 of the chip) of the detection unit are connected to the two ends of the sampling resistor, respectively. The voltage across the resistor is acquired, filtered, and amplified 20 times as a differential signal, and then sent to the information processing module through the sixth terminal of the detection unit. The information processing module converts the acquired voltage value to obtain the corresponding current value, i.e., the target detection information. Therefore, the initial and intermediate detection information of this invention is voltage information, and the target detection information is current information.

[0039] The detection requirements are charging detection, discharging detection, or bidirectional current detection. The connection method between the detection unit and the household appliance under test is related to the current type and the voltage value at the first terminal of the detection unit. Specifically, when the detection requirement is charging detection, the first detection port is connected to the first terminal of the sampling resistor, the second detection port is connected to the second terminal of the sampling resistor, and the voltage information at the first terminal of the detection unit is controlled to be a ground signal, that is, the first terminal of the detection unit needs to be grounded or the voltage value at the first terminal of the detection unit needs to be set to 0V (this can be achieved by adjusting the resistance values ​​of R1 and R2); when the detection requirement is discharging detection, the first detection port is connected to the second terminal of the sampling resistor, the second detection port is connected to the first terminal of the sampling resistor, and the voltage information at the first terminal of the detection unit is controlled to be a ground signal; when the detection requirement is bidirectional current detection, the first detection port is connected to the first terminal of the sampling resistor, the second detection port is connected to the second terminal of the sampling resistor, and the voltage information at the first terminal of the detection unit is controlled to be a reference voltage.

[0040] Specifically, the intermediate detection information is either charging intermediate detection information or discharging intermediate detection information. When the household appliance under test is charging, the charging intermediate detection information V1 = Vf - A*I*Rs; when the household appliance under test is discharging, the discharging intermediate detection information V2 = Vf + A*I*Rs. Among them, the charging intermediate detection information or the discharging intermediate detection information is the output voltage of the sixth terminal of the detection unit, Vf represents the reference voltage, A represents the voltage amplification factor of the information detection module, I represents the current flowing through the sampling resistor, and Rs represents the resistance value of the sampling resistor.

[0041] Under normal circumstances, V1 is generally between Vf and 3V3 (i.e., VCC-3V3), and V2 is generally between 0V and Vf. If V1 is not between Vf and 3V3, it indicates an abnormal discharge current; if V2 is not between 0V and Vf, it indicates an abnormal charging current.

[0042] The information processing module is specifically used to: determine the normal voltage range of the household appliance to be tested based on the testing requirements; determine that the household appliance to be tested is operating normally when the voltage information of the intermediate testing information is within the normal voltage range; and determine that there is an abnormal current in the household appliance to be tested when the voltage information of the intermediate testing information exceeds the normal voltage range.

[0043] Specifically, when the detection requirement is for charging, the normal voltage range is 0V to Vf; when the detection requirement is for discharging, the normal voltage range is Vf to 3V3.

[0044] The detection device of this invention can detect currents with a large range, for example, it can detect both a 10A operating current and a 2A charging current. The reference voltage is set to 1.65V, and the value of Rs is less than 0.007Ω, for example, 0.005Ω. Combined with... Figure 2 and Figure 3 The charging and discharging process is described as follows: When the battery is charging, the current flows from A1 to A2, and the voltage output from the sixth terminal of the detection unit (referring to the voltage flowing to the information processing module after passing through the fifth resistor) ranges from 1.65V to 3.3V. When the battery is discharging, the current flows from A2 to A1, and the voltage output from the sixth terminal of the detection unit ranges from 0V to 1.65V. A reference voltage can be obtained by dividing the 3.3V voltage using high-precision resistors. For example, when the resistor accuracy is ±0.5%, using two 1K resistors to divide the 3.3V voltage will result in a reference voltage of 1.649V even with the maximum error. It is worth noting that the sampling resistor also needs to be a high-precision resistor; this setting is to ensure the accuracy of the sampling.

[0045] This invention designs a device capable of measuring high-current, low-current, charging current, and discharging current information of a household appliance under test. For example, based on the testing requirements of the appliance, the connection method and normal voltage range between the appliance and the information detection module are determined. Combining the normal voltage range with the voltage information from intermediate detection data, it is determined whether there is an abnormal current in the appliance. When the appliance is operating normally, the intermediate detection data is converted to obtain the appliance's current information. This allows for the detection of different types of current information and further evaluation of the appliance's operating status, ensuring its safety. It reduces the cost and difficulty of current information detection, and improves the efficiency of current information and appliance safety detection. It solves the problems of different current characteristics during charging and discharging processes of different household appliances, and even the different current ranges during charging and discharging processes of the same appliance. Previously, testing required personnel to connect different testing devices based on the appliance's current characteristics and charging / discharging process, resulting in complex operation, low current detection efficiency, and high testing costs.

[0046] This invention also provides a current detection system capable of adaptively measuring the current information of different household appliances or household appliances in different operating states. This system includes any of the current detection devices described in the above embodiments.

[0047] The current detection system of this utility model includes any one of the current detection devices in the above embodiments. It is a system capable of measuring the high current, low current, charging current, and discharging current information of the household appliance under test. It can determine the connection method and normal voltage range between the household appliance under test and the information detection module according to the different detection requirements of the household appliance. Then, it combines the normal voltage range with the voltage information in the intermediate detection information to determine whether there is a current abnormality in the household appliance under test. When the household appliance under test is operating normally, it converts the intermediate detection information to obtain the current information of the household appliance under test. It can detect different types of current information and further evaluate the operating status of the household appliance under test, ensuring its safety. It solves the problems of different current characteristics during the charging and discharging processes of different household appliances, and different current ranges during the charging and discharging processes of the same household appliance. When performing testing, testers need to connect different testing devices according to the current characteristics and charging and discharging processes of the household appliances, resulting in complex operation, low current detection efficiency, and high testing costs. This current detection system includes any one of the current detection devices in the above embodiments and possesses the corresponding beneficial effects of the aforementioned current detection devices.

[0048] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0049] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A current detection device, characterized in that, include: The system includes a household appliance to be tested, an information detection module, and an information processing module. The information detection module is connected to both the household appliance to be tested and the information processing module. The household appliance to be tested includes a sampling resistor. The information detection module includes a detection unit, a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a first capacitor, a second capacitor, a third capacitor, a fourth capacitor, a fifth capacitor, a first detection port, and a second detection port. The information processing module is used to determine the target connection method between the household appliance to be tested and the information detection module based on the detection requirements of the household appliance to be tested; wherein, when the detection requirement is a charging detection requirement or a bidirectional current detection requirement, the first detection port is connected to the first end of the sampling resistor, and the second detection port is connected to the second end of the sampling resistor; when the detection requirement is a discharging detection requirement, the first detection port is connected to the second end of the sampling resistor, and the second detection port is connected to the first end of the sampling resistor. The information detection module is used to obtain initial detection information of the home appliance to be tested after the home appliance to be tested and the information detection module are connected based on the target connection method, and to process the initial detection information to obtain intermediate detection information. The information processing module is further configured to receive the intermediate detection information sent by the information detection module, determine the detection result of the household appliance to be tested based on the intermediate detection information and the detection requirements, and when the detection result indicates that the household appliance to be tested is operating normally, convert the voltage information of the intermediate detection information to obtain the target detection information; the intermediate detection information is the output voltage of the sixth terminal of the detection unit, and the target detection information is the current information corresponding to the voltage information of the intermediate detection information.

2. The current detection device according to claim 1, characterized in that, The initial detection information and the intermediate detection information are voltage information, and the target detection information is current information.

3. The current detection device according to claim 1, characterized in that, The first terminal of the detection unit is connected to the first terminal of the first resistor and the first terminal of the second resistor, respectively. The second terminal of the first resistor is connected to an electrical signal. The second terminal of the second resistor is connected to the second terminal of the detection unit and a ground signal, respectively. The third terminal of the detection unit is connected to the first terminal of the first capacitor, the first terminal of the second capacitor, and an electrical signal, respectively. The second terminal of the first capacitor is connected to the second terminal of the second capacitor and a ground signal, respectively. The fourth terminal of the detection unit is connected to the first terminal of the third resistor and the first terminal of the third capacitor, respectively. The second terminal of the third resistor is connected to the first detection port, and the second terminal of the third capacitor is connected to a ground signal, respectively. The fifth terminal of the detection unit is connected to the first terminal of the fourth resistor and the first terminal of the fourth capacitor, respectively. The second terminal of the fourth resistor is connected to the second detection port, and the second terminal of the fourth capacitor is connected to a ground signal, respectively. The sixth terminal of the detection unit is connected to the first terminal of the fifth resistor, respectively. The second terminal of the fifth resistor is connected to the first terminal of the fifth capacitor and the information processing module, respectively. The second terminal of the fifth capacitor is connected to a ground signal, respectively.

4. The current detection device according to claim 3, characterized in that, The second end of the sampling resistor is connected to the positive terminal of the battery of the household appliance under test, and the first end of the sampling resistor is connected to the battery signal terminal of the household appliance under test.

5. The current detection device according to claim 4, characterized in that, The detection requirement can be a charging detection requirement, a discharging detection requirement, or a bidirectional current detection requirement. When the detection requirement is the charging detection requirement, the voltage information at the first terminal of the detection unit is controlled to be a ground signal; When the detection requirement is the discharge detection requirement, the voltage information at the first terminal of the detection unit is controlled to be a ground signal; When the detection requirement is the bidirectional current detection requirement, the voltage information at the first terminal of the detection unit is controlled to be the reference voltage.

6. The current detection device according to claim 5, characterized in that, The information detection module is specifically used for: The voltage information of the initial detection information is amplified by a preset factor to obtain the intermediate detection information.

7. The current detection device according to claim 6, characterized in that, The intermediate detection information is either charging intermediate detection information or discharging intermediate detection information; When the household appliance under test is charging, the charging intermediate detection information When the household appliance to be tested discharges, the intermediate discharge detection information... ; Wherein, the charging intermediate detection information or the discharging intermediate detection information is the output voltage of the sixth terminal of the detection unit, Vf represents the reference voltage, A represents the voltage amplification factor of the information detection module, I represents the current flowing through the sampling resistor, and Rs represents the resistance value of the sampling resistor.

8. The current detection device according to claim 1, characterized in that, The information processing module is specifically used for: The normal voltage range of the household appliance to be tested is determined based on the aforementioned testing requirements; When the voltage information of the intermediate detection information is within the normal voltage range, it is determined that the household appliance under test is operating normally. When the voltage information of the intermediate detection information exceeds the normal voltage range, it is determined that the household appliance under test has an abnormal current.

9. A current detection system, characterized in that, include: The current detection device as described in any one of claims 1 to 8.

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