Voltage detection device, electronic apparatus, and vehicle

Abstract

The utility model relates to the technical field of voltage detection, in particular to a voltage detection device, electronic equipment and a vehicle. Wherein the voltage detection device is connected with the battery system, the battery system comprises at least one switch, voltage sampling points are arranged at two ends of the switch, and the voltage detection device comprises a plurality of analog-to-digital conversion modules and at least one voltage comparison module; the first ends of the analog-to-digital conversion modules are in one-to-one correspondence connection with the voltage sampling points; the voltage comparison modules are in one-to-one correspondence with the switches, and the two input ends of the voltage comparison modules are connected with the second ends of the two analog-to-digital conversion modules connected with the two voltage sampling points at the two ends of the same switch respectively. According to the utility model, when voltage sampling is carried out on a plurality of sampling points in a battery system, the synchronism and the sampling frequency among the plurality of sampling points can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of voltage detection, and in particular to a voltage detection device, electronic equipment and a vehicle. Background Art

[0002] The high-voltage circuit of a battery system contains multiple switches to ensure power-up and safe disconnection. In related technologies, voltage sampling is performed by connecting an analog-to-digital converter (ADC) chip to voltage sampling points located at both ends of the switch. The voltage signal sampled by the ADC chip is transmitted back to the microcontroller unit (MCU) via daisy-chain communication. The voltage difference between the sampling points is determined, thereby accurately diagnosing the on / off status of the switch.

[0003] However, analog front-end ADC chips all use a single ADC combined with a multiplexer to sample voltages at multiple voltage sampling points. The ADC conversion speed is slow, and multiple sampling channels need to be switched through a multiplexer, resulting in poor synchronization between the sampling points. In addition, transmitting the voltage signal sampled by the ADC chip back to the MCU via daisy-chain communication to determine the voltage difference between the sampling points will cause the sampling frequency to decrease, resulting in transient voltage changes between the switch contacts that may not be recognized due to poor synchronization between the sampling points and the low sampling frequency. Utility Model Content

[0004] The utility model provides a voltage detection device, an electronic device and a vehicle, the main purpose of which is to improve the synchronization and sampling frequency between multiple sampling points when voltage is sampled at multiple sampling points in a battery system.

[0005] According to one aspect of the present invention, a voltage detection device is provided, wherein the voltage detection device is connected to a battery system, wherein the battery system includes at least one switch, and voltage sampling points are provided at both ends of the switch. The voltage detection device includes multiple analog-to-digital conversion modules and at least one voltage comparison module; wherein,

[0006] The first end of the analog-to-digital conversion module is connected to the voltage sampling point in a one-to-one correspondence;

[0007] The voltage comparison module corresponds to the switch in a one-to-one manner, and two input terminals of the voltage comparison module are respectively connected to the second terminals of two analog-to-digital conversion modules connected to two voltage sampling points at two ends of the same switch.

[0008] Optionally, in one embodiment of the present invention, the voltage detection device further includes a control module; wherein,

[0009] The output end of the voltage comparison module is connected to the control module.

[0010] Optionally, in one embodiment of the present invention, the analog-to-digital conversion module includes an analog-to-digital conversion chip, a first resistor, and a second resistor; wherein,

[0011] The first end of the first resistor is connected to the voltage sampling point, the second end of the first resistor is respectively connected to the first end of the analog-to-digital conversion chip and the first end of the second resistor, the second end of the second resistor is grounded, and the second end of the analog-to-digital conversion chip is connected to the input end of the voltage comparison module.

[0012] Optionally, in one embodiment of the present invention, the analog-to-digital conversion module further includes a voltage register module; wherein,

[0013] The first end of the voltage register module is connected to the second end of the analog-to-digital conversion chip, and the second end of the voltage register module is connected to the input end of the voltage comparison module.

[0014] Optionally, in one embodiment of the present invention, the voltage comparison module includes a sampling point voltage comparison submodule and a voltage difference comparison submodule; wherein,

[0015] The two input terminals of the sampling point voltage comparison submodule are respectively connected to the second terminals of the two analog-to-digital conversion modules connected to the two voltage sampling points at both ends of the same switch, the output terminal of the sampling point voltage comparison submodule is connected to the first input terminal of the voltage difference comparison submodule, and the voltage corresponding to the second input terminal of the voltage difference comparison submodule is the voltage difference threshold voltage.

[0016] Optionally, in one embodiment of the present invention, the voltage comparison module further includes a voltage difference register module; wherein,

[0017] The first end of the pressure difference register module is connected to the output end of the sampling point voltage comparison submodule and the first input end of the pressure difference comparison submodule respectively, and the second end of the pressure difference register module is connected to the output end of the pressure difference comparison submodule.

[0018] Optionally, in one embodiment of the present invention, the sampling point voltage comparison submodule includes an operational amplifier; wherein,

[0019] The two input terminals of the operational amplifier are respectively connected to the second terminals of the two analog-to-digital conversion modules connected to the two voltage sampling points at both ends of the same switch, and the output terminal of the operational amplifier is connected to the first input terminal of the voltage difference comparison submodule.

[0020] According to another aspect of the present invention, an electronic device is provided, comprising: a battery system and a voltage detection device as described in any one of the aforementioned aspects.

[0021] According to another aspect of the present invention, a vehicle is provided, comprising: a battery system and a voltage detection device as described in any one of the aforementioned aspects.

[0022] In summary, the voltage detection device, electronic device, and vehicle provided by the embodiments of the present invention can improve the synchronization between sampling points by connecting an analog-to-digital conversion module to each voltage sampling point. Secondly, the voltage difference between the sampling points is judged by the voltage comparison module, and the sampling frequency is high compared to the method of transmitting the sampled voltage signal back to the MCU through daisy chain communication to judge the voltage difference between the sampling points.

[0023] It should be understood that the above general description and the following detailed description are merely exemplary and explanatory and are not restrictive of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The accompanying drawings are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0025] Figure 1 A schematic structural diagram of a voltage detection device provided by one embodiment of the present utility model;

[0026] Figure 2 A schematic structural diagram of a voltage detection device provided by another embodiment of the present utility model;

[0027] Figure 3 A schematic structural diagram of a voltage detection device provided by another embodiment of the present utility model;

[0028] Figure 4 A schematic structural diagram of an analog-to-digital conversion module provided by one embodiment of the present invention;

[0029] Figure 5 A schematic structural diagram of an analog-to-digital conversion module provided by another embodiment of the present invention;

[0030] Figure 6 A schematic diagram of the structure of a voltage comparison module provided by one embodiment of the present utility model;

[0031] Figure 7 A schematic structural diagram of a voltage comparison module provided by another embodiment of the present utility model;

[0032] Figure 8The present invention is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0033] Some embodiments of the present invention will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. Various changes, modifications and equivalents of the methods, devices and / or systems described herein will become apparent after understanding the present invention. For example, the order of operations described herein is merely an example and is not limited to those orders set forth herein, but can be changed as becomes apparent after understanding the present invention, except for operations that must be performed in a specific order. In addition, for clarity and brevity, descriptions of features known in the art may be omitted.

[0034] The embodiments described in the following examples of the present invention do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with some aspects of the present invention as detailed in the appended claims.

[0035] The present invention will be described in detail below with reference to specific embodiments.

[0036] Figure 1 This is a schematic diagram of the structure of a voltage detection device provided by an embodiment of the present utility model. Figure 1 As shown, the voltage detection device includes: the voltage detection device is connected to the battery system, the battery system includes at least one switch S, and voltage sampling points are set at both ends of the switch S. The voltage detection device includes multiple analog-to-digital conversion modules and at least one voltage comparison module; wherein,

[0037] The first end of the analog-to-digital conversion module is connected to the voltage sampling points in a one-to-one correspondence;

[0038] The voltage comparison module corresponds to the switch in a one-to-one manner, and the two input terminals of the voltage comparison module are respectively connected to the second terminals of the two analog-to-digital conversion modules connected to the two voltage sampling points at both ends of the same switch.

[0039] According to some embodiments, types of switches in the battery system include, but are not limited to, relays, contactors, optocouplers, thyristors, integrated switches, and the like.

[0040] In some embodiments, the analog-to-digital conversion module is used to obtain an analog voltage signal from a voltage sampling point to which it is connected, and convert the analog voltage signal into a digital voltage signal to be input into the voltage comparison module.

[0041] In some embodiments, the voltage comparison module is configured to compare the digital voltage signal input by the analog-to-digital conversion module to obtain a voltage difference across the switch S, and to make a judgment based on the voltage difference to accurately diagnose the switch state of the switch S and obtain a voltage comparison result. The switch state includes, but is not limited to, an on state, an off state, a fault state, and the like.

[0042] It should be noted that by connecting an analog-to-digital conversion module to each voltage sampling point, the synchronization between the sampling points can be improved. Secondly, the voltage difference between the sampling points is judged by the voltage comparison module. Compared with the method of transmitting the sampled voltage signal back to the MCU through daisy chain communication to judge the voltage difference between the sampling points, the sampling frequency is high.

[0043] Optionally, Figure 2 This is a schematic diagram of the structure of a voltage detection device provided by an embodiment of the present utility model. Figure 2 As shown, the voltage detection device also includes a control module; wherein,

[0044] The output end of the voltage comparison module is connected to the control module.

[0045] According to some embodiments, after receiving the voltage comparison result output by the voltage comparison module, the control module may perform an operation corresponding to the voltage comparison result. For example, if the control module receives a voltage comparison result indicating that switch S is in a faulty state, the control module may issue an alarm to instruct the switch S to be repaired.

[0046] In some embodiments, the output end of the voltage comparison module and the control module can be connected in a daisy-chain communication manner via a serial peripheral interface (SPI). In this case, the voltage comparison module and the control module can periodically communicate with each other at a preset duration, which does not specifically refer to a fixed duration. The preset duration can be, for example, 100 ms.

[0047] In some embodiments, the control module may be, for example, an MCU.

[0048] It should be noted that the control module directly receives the voltage comparison result output by the voltage comparison module. Compared with the control module receiving the sampled voltage signal to judge the voltage difference between the sampling points, it can reduce the situation where the sampling frequency is reduced due to the long communication cycle, thereby causing the control module to fail to obtain the voltage signal at the correct moment and resulting in inaccurate diagnosis of the switch state of the switch S. This can improve the accuracy of the switch state diagnosis of the switch S.

[0049] Optionally, Figure 3This is a schematic diagram of the structure of a voltage detection device provided by an embodiment of the present utility model. Figure 3 As shown, the voltage detection device also includes a voltage comparison result storage module; wherein,

[0050] The output end of the voltage comparison module is connected to the first end of the voltage comparison result storage module, and the second end of the voltage comparison result storage module is connected to the control module.

[0051] According to some embodiments, the voltage comparison result registering module is used to register the voltage comparison result output by the voltage comparison module.

[0052] In some embodiments, the voltage comparison result storage module may be implemented as a fault flag register, for example. The fault flag register includes at least one output signal, each output signal corresponding to a switch S. If the voltage comparison result indicates that the switch S is in a fault state, the level of the output signal may be 0; if the voltage comparison result indicates that the switch S is in a non-fault state, the level of the output signal may be 1; alternatively, if the voltage comparison result indicates that the switch S is in a fault state, the level of the output signal may be 1; if the voltage comparison result indicates that the switch S is in a non-fault state, the level of the output signal may be 0.

[0053] It should be noted that a voltage comparison result storage module is used to temporarily store the voltage comparison result obtained by the voltage comparison module. In this case, the situation in which the control module may not be able to obtain the voltage signal at the correct time due to the existence of the communication cycle, resulting in inaccurate switch state diagnosis of the switch S, can be reduced, and the accuracy of the switch state diagnosis of the switch S can be improved.

[0054] Optionally, Figure 4 This is a schematic diagram of the structure of an analog-to-digital conversion module provided by an embodiment of the present utility model. Figure 4 As shown, the analog-to-digital conversion module includes an analog-to-digital conversion chip, a first resistor and a second resistor; wherein,

[0055] The first end of the first resistor is connected to the voltage sampling point, the second end of the first resistor is respectively connected to the first end of the analog-to-digital conversion chip and the first end of the second resistor, the second end of the second resistor is grounded, and the second end of the analog-to-digital conversion chip is connected to the input end of the voltage comparison module.

[0056] According to some embodiments, by providing the first resistor, the analog-to-digital conversion chip can be protected, thereby reducing the possibility of damage to the analog-to-digital conversion chip due to an excessively high voltage at the sampling point.

[0057] In some embodiments, by setting the second resistor as a pull-down resistor, the first end of the analog-to-digital conversion chip can be kept in a low level state when no external input is received, thereby reducing interference and errors.

[0058] Optionally, Figure 5 This is a schematic diagram of the structure of an analog-to-digital conversion module provided by an embodiment of the present utility model. Figure 5 As shown, the analog-to-digital conversion module also includes a voltage register module; wherein,

[0059] The first end of the voltage register module is connected to the second end of the analog-to-digital conversion chip, and the second end of the voltage register module is connected to the input end of the voltage comparison module.

[0060] It should be noted that by using a voltage register module to temporarily store the digital voltage signal of the voltage sampling point obtained by sampling the analog-to-digital conversion chip, the situation in which the voltage comparison module may not be able to obtain the digital voltage signal at the correct time due to the existence of the communication cycle, resulting in inaccurate switch state diagnosis of switch S, can be reduced, and the accuracy of the switch state diagnosis of switch S can be improved.

[0061] Optionally, Figure 6 This is a schematic diagram of the structure of a voltage comparison module provided by an embodiment of the present utility model. Figure 6 As shown, the voltage comparison module includes a sampling point voltage comparison submodule and a voltage difference comparison submodule; wherein,

[0062] The two input terminals of the sampling point voltage comparison submodule are respectively connected to the second terminals of the two analog-to-digital conversion modules connected to the two voltage sampling points at both ends of the same switch, the output terminal of the sampling point voltage comparison submodule is connected to the first input terminal of the voltage difference comparison submodule, and the voltage corresponding to the second input terminal of the voltage difference comparison submodule is the voltage difference threshold voltage.

[0063] According to some embodiments, the sampling point voltage comparison submodule is configured to determine a voltage difference between two voltage sampling points across the same switch.

[0064] In some embodiments, the sampling point voltage comparison submodule may include, for example, an operational amplifier; in this case, two input terminals of the operational amplifier are respectively connected to the second terminals of two analog-to-digital conversion modules connected to two voltage sampling points at both ends of the same switch, and the output terminal of the operational amplifier is connected to the first input terminal of the voltage difference comparison submodule.

[0065] In some embodiments, the sampling point voltage comparison submodule may also use, for example, an adder or subtractor composed of an operational amplifier to determine the voltage difference between two voltage sampling points at both ends of the same switch.

[0066] According to some embodiments, the voltage difference comparison submodule is configured to compare the voltage difference value calculated by the sampling point voltage comparison submodule with a voltage difference threshold value, thereby diagnosing the switching state of the switch S.

[0067] For example, if the voltage difference is greater than the voltage difference threshold, it can be determined that the switch state of the switch S is a fault state; if the voltage difference is not greater than the voltage difference threshold, it can be determined that the switch state of the switch S is a non-fault state.

[0068] Optionally, Figure 7 This is a schematic diagram of the structure of a voltage comparison module provided by an embodiment of the present utility model. Figure 7 As shown, the voltage comparison module also includes a voltage difference register module; wherein,

[0069] The first end of the pressure difference register module is connected to the output end of the sampling point voltage comparison submodule and the first input end of the pressure difference comparison submodule respectively, and the second end of the pressure difference register module is connected to the output end of the pressure difference comparison submodule.

[0070] According to some embodiments, the voltage difference register module is used to temporarily store a voltage difference between two voltage sampling points at two ends of a same switch.

[0071] In some embodiments, the voltage difference register module may include, for example, a maximum voltage difference register, which may temporarily store the maximum voltage difference between two voltage sampling points at both ends of the same switch.

[0072] It should be noted that by using the voltage difference storage module to temporarily store the voltage difference calculated by the sampling point voltage comparison submodule, the situation in which the voltage difference comparison submodule may not be able to obtain the voltage difference at the correct moment due to the existence of the communication cycle, resulting in inaccurate switch state diagnosis of switch S, can be reduced, and the accuracy of the switch state diagnosis of switch S can be improved.

[0073] In summary, the voltage detection device provided by the embodiment of the present invention can improve the synchronization between the sampling points by connecting an analog-to-digital conversion module to each voltage sampling point. Secondly, the voltage difference between the sampling points is judged by the voltage comparison module. Compared with the method of transmitting the sampled voltage signal back to the MCU through daisy chain communication to judge the voltage difference between the sampling points, the sampling frequency is high.

[0074] According to an embodiment of the present invention, the present invention further provides an electronic device.

[0075] The electronic device includes: a battery system and a voltage detection device as shown in any of the above embodiments.

[0076] Take a scenario as an example, Figure 8This is a schematic diagram of the structure of an electronic device provided by an embodiment of the present utility model. Figure 8 As shown, the battery system includes four relays S1, S2, S3, and S4, and the voltage detection device is set in the battery management system (BMS), wherein,

[0077] A first sampling point is set between S3 and other devices such as the fast charging port, a second sampling point is set between S4 and other devices such as the fast charging port, a third sampling point is set between S2 and S4, a fourth sampling point is set between S1 and S3, and a fifth sampling point is set between S1 and the positive electrode of the battery;

[0078] The first analog-to-digital conversion module connected to the first sampling point includes resistors R1, R10, ADC1, and register 1; the second analog-to-digital conversion module connected to the second sampling point includes resistors R2, R9, ADC2, and register 2; the third analog-to-digital conversion module connected to the third sampling point includes resistors R3, R8, ADC3, and register 3; the fourth analog-to-digital conversion module connected to the fourth sampling point includes resistors R4, R7, ADC4, and register 4; and the fifth analog-to-digital conversion module connected to the fifth sampling point includes resistors R5, R6, ADC5, and register 5;

[0079] The first voltage comparison module corresponding to S1 includes an adder 1#, a comparator 1#, and a maximum voltage difference register 1#, wherein the two input terminals of the adder 1# are respectively connected to the second terminal of the fourth analog-to-digital conversion module and the second terminal of the fifth analog-to-digital conversion module;

[0080] The second voltage comparison module corresponding to S2 includes an adder 2#, a comparator 2#, and a maximum voltage difference register 2#. Since S2 and the negative terminal of the battery are grounded, there is no need to set a voltage sampling point between S2 and the negative terminal of the battery. Grounding one input terminal of adder 2# is equivalent to sampling the voltage between S2 and the negative terminal of the battery. The other input terminal of adder 2# is connected to the second terminal of the third analog-to-digital conversion module.

[0081] The third voltage comparison module corresponding to S3 includes an adder 3#, a comparator 3#, and a maximum voltage difference register 3#, wherein the two input terminals of the adder 3# are connected to the second terminal of the first analog-to-digital conversion module and the second terminal of the fourth analog-to-digital conversion module respectively;

[0082] The fourth voltage comparison module corresponding to S4 includes an adder 4#, a comparator 4#, and a maximum voltage difference register 4#, wherein two input terminals of the adder 4# are respectively connected to the second terminal of the second analog-to-digital conversion module and the second terminal of the third analog-to-digital conversion module;

[0083] The first end of the fault flag register is connected to the output end of the first voltage comparison module, the output end of the second voltage comparison module, the output end of the third voltage comparison module and the output end of the fourth voltage comparison module, and the second end of the fault flag register is connected to the MCU.

[0084] In summary, the electronic device provided by the embodiment of the present invention can improve the synchronization and sampling frequency between multiple sampling points when performing voltage sampling at multiple sampling points in a battery system by using the above-mentioned voltage detection device.

[0085] According to an embodiment of the present utility model, the present utility model also provides a vehicle.

[0086] The vehicle includes: a battery system and a voltage detection device as shown in any of the above embodiments.

[0087] In summary, the electronic device provided by the embodiment of the present invention can improve the synchronization and sampling frequency between multiple sampling points when performing voltage sampling at multiple sampling points in a battery system by using the above-mentioned voltage detection device.

[0088] In the above detailed description, reference is made to the accompanying drawings, which illustrate specific aspects of the present invention that can be practiced. In this regard, terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicating directions or expressing positional relationships may be used with reference to the orientation of the described figures. Since the components of the described devices can be positioned in a plurality of different orientations, directional terms can be used for illustrative purposes rather than restrictive. It should be understood that other aspects can be utilized and structural or logical changes can be made without departing from the concepts of the present invention. Therefore, the following detailed description should not be regarded as limiting.

[0089] It should be understood that, unless otherwise specifically noted, the features of some embodiments of the various present inventions described herein may be combined with each other. As used herein, the term "and / or" includes any one of the relevant listed items and any combination of any two or more thereof; similarly, "at least one of" includes any one of the relevant listed items and any combination of any two or more thereof.

[0090] It should be understood that, unless otherwise expressly specified or limited, the terms "join," "attach," "install," "connect," "connect," "fix," etc. used in the embodiments of the present invention should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrated; they can be mechanically connected, electrically connected, or communicable with each other; they can be directly connected, or indirectly connected through an intermediate medium; they can be internal communication between two elements or an interactive relationship between two elements, unless otherwise expressly limited. For those skilled in the art, the specific meanings of the above terms in this article can be understood according to specific circumstances.

[0091] In addition, the term "over" as used in reference to a component, element, or material layer being formed "over" or located "over" a surface may be used herein to mean that the component, element, or material layer is "indirectly" positioned (e.g., placed, formed, deposited, etc.) on the surface such that one or more additional components, elements, or layers are disposed between the surface and the component, element, or material layer. However, the term "over" as used in reference to a component, element, or material layer being formed "over" or located "over" a surface may alternatively have a specific meaning: the component, element, or material layer is "directly" positioned (e.g., placed, formed, deposited, etc.) on the surface, e.g., in direct contact with the surface.

[0092] Although terms such as "first", "second" and "third" may be used herein to describe various components, parts, regions, layers or sections, these components, parts, regions, layers or sections are not limited to these terms. On the contrary, these terms are only used to distinguish one component, part, region, layer or section from another component, part, region, layer or section. Therefore, without departing from the teachings of each example, the first component, part, region, layer or section mentioned in the examples described herein may also be referred to as the second component, part, region, layer or section. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" can explicitly or implicitly include at least one such feature. In the description herein, the meaning of "multiple" is at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0093] It should be understood that spatially relative terms such as "above," "upper," "below," and "lower" are used herein to describe the relationship of one element to another element shown in the figures. In addition to the orientation depicted in the figures, such spatially relative terms are intended to encompass different orientations of the device in use or operation. For example, if the device in the figures is flipped, an element described as being "above" or "upper" relative to another element will be "below" or "lower" relative to the other element. Thus, the term "above" encompasses both above and below orientations, depending on the spatial orientation of the device. The device may be oriented in other ways (e.g., rotated 90 degrees or in other orientations), and the spatially relative terms used herein should be interpreted accordingly.

Claims

1. A voltage detection device, characterized in that: The voltage detection device is connected to a battery system, the battery system includes at least one switch, both ends of the switch are provided with voltage sampling points, the voltage detection device includes a plurality of analog-to-digital conversion modules and at least one voltage comparison module; wherein, The first end of the analog-to-digital conversion module is connected to the voltage sampling point in a one-to-one correspondence; The voltage comparison module corresponds to the switch in a one-to-one manner, and two input terminals of the voltage comparison module are respectively connected to the second terminals of two analog-to-digital conversion modules connected to two voltage sampling points at two ends of the same switch.

2. The voltage detection device according to claim 1, wherein: The voltage detection device further includes a control module; wherein, The output end of the voltage comparison module is connected to the control module.

3. The voltage detection device according to claim 2, characterized in that: The voltage detection device also includes a voltage comparison result storage module; wherein, The output end of the voltage comparison module is connected to the first end of the voltage comparison result storage module, and the second end of the voltage comparison result storage module is connected to the control module.

4. The voltage detection device according to claim 1, wherein: The analog-to-digital conversion module includes an analog-to-digital conversion chip, a first resistor and a second resistor; wherein, The first end of the first resistor is connected to the voltage sampling point, the second end of the first resistor is respectively connected to the first end of the analog-to-digital conversion chip and the first end of the second resistor, the second end of the second resistor is grounded, and the second end of the analog-to-digital conversion chip is connected to the input end of the voltage comparison module.

5. The voltage detection device according to claim 4, characterized in that: The analog-to-digital conversion module also includes a voltage register module; wherein, The first end of the voltage register module is connected to the second end of the analog-to-digital conversion chip, and the second end of the voltage register module is connected to the input end of the voltage comparison module.

6. The voltage detection device according to claim 1, wherein: The voltage comparison module includes a sampling point voltage comparison submodule and a voltage difference comparison submodule; wherein, The two input terminals of the sampling point voltage comparison submodule are respectively connected to the second terminals of the two analog-to-digital conversion modules connected to the two voltage sampling points at both ends of the same switch, the output terminal of the sampling point voltage comparison submodule is connected to the first input terminal of the voltage difference comparison submodule, and the voltage corresponding to the second input terminal of the voltage difference comparison submodule is the voltage difference threshold voltage.

7. The voltage detection device according to claim 6, characterized in that: The voltage comparison module also includes a voltage difference register module; wherein, The first end of the pressure difference register module is connected to the output end of the sampling point voltage comparison submodule and the first input end of the pressure difference comparison submodule respectively, and the second end of the pressure difference register module is connected to the output end of the pressure difference comparison submodule.

8. The voltage detection device according to claim 6, wherein: The sampling point voltage comparison submodule includes an operational amplifier; wherein, The two input terminals of the operational amplifier are respectively connected to the second terminals of the two analog-to-digital conversion modules connected to the two voltage sampling points at both ends of the same switch, and the output terminal of the operational amplifier is connected to the first input terminal of the voltage difference comparison submodule.

9. An electronic device, characterized in that: include: A battery system and a voltage detection device according to any one of claims 1 to 8.

10. A vehicle, characterized in that: include: A battery system and a voltage detection device according to any one of claims 1 to 8.

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