Reset circuit of coulometric chip, battery management system, battery and electric device

Abstract

This utility model discloses a reset circuit for a fuel gauge chip, a battery management system, a battery, and an electrical device. It includes a main control chip and a dual-channel reset chip. The main control chip is connected to the fuel gauge chip via a first communication line. The signal identification terminal of the dual-channel reset chip is connected to the main control chip, and the signal output terminal of the dual-channel reset chip is connected to the reset terminal of the fuel gauge chip. When the fuel gauge chip malfunctions, the main control chip outputs a low-level signal to the signal identification terminal of the dual-channel reset chip. Upon receiving the low-level signal, the dual-channel reset chip outputs a reset signal to the reset terminal of the fuel gauge chip. Upon receiving the reset signal, the fuel gauge chip performs a power-on / off reset, returning it to its initial normal state. This solves the problem that the main control chip's reset command cannot reset the fuel gauge chip to its initial normal state, thus reducing costs to some extent.

Description

Technical Field

[0001] This utility model relates to the field of fuel gauge chips, and in particular to a reset circuit for a fuel gauge chip, a battery management system, a battery, and an electrical device. Background Technology

[0002] With the increasing popularity of intelligent electronic products, smart products are becoming more and more functional, and digital products are placing more and more demands on the functionality of lithium batteries. In daily use, abnormal use of the product or environmental interference can cause interference to the fuel gauge chip, which may lead to abnormal operation of the fuel gauge chip (such as fluctuating power levels, parameter disorder, etc.), or even failure to communicate with the main control chip.

[0003] The existing reset circuit connects the fuel gauge chip and the main control chip via a communication line for normal data transmission. In addition, the reset function of the fuel gauge is also reused through the communication line between the two. When the fuel gauge chip malfunctions, the main control chip can only send a reset command to the fuel gauge chip, but this can only solve part of the problem (such as inaccurate fuel readings) and cannot reset the fuel gauge chip to its initial normal state. Summary of the Invention

[0004] This utility model provides a reset circuit for a fuel gauge chip, a battery management system, a battery, and an electrical device to solve the problem in the prior art that when the fuel gauge chip experiences abnormal operating conditions, the reset command of the main control chip cannot reset the fuel gauge chip to its initial normal state.

[0005] To achieve the above objectives, in one embodiment, a reset circuit for a fuel gauge chip is provided, the reset circuit comprising:

[0006] The system includes a main control chip and a dual-channel reset chip. The main control chip is connected to the fuel gauge chip via a first communication line. The signal identification terminal of the dual-channel reset chip is connected to the main control chip, and the signal output terminal of the dual-channel reset chip is connected to the reset terminal of the fuel gauge chip.

[0007] In one embodiment, the signal recognition terminal of the dual-channel reset chip is connected to the main control chip via the first communication line.

[0008] In one embodiment, the signal recognition terminal of the dual-channel reset chip is connected to the main control chip via a second communication line.

[0009] In one embodiment, the first communication line includes an I2C bus.

[0010] In one embodiment, the reset terminal of the fuel gauge chip includes the power supply pin or the enable pin of the fuel gauge chip.

[0011] In one embodiment, the second communication line includes an I2C bus.

[0012] In one embodiment, the signal recognition terminal of the dual-channel reset chip includes a first signal recognition terminal and a second signal recognition terminal. The first signal recognition terminal is connected to the serial data line of the I2C bus, and the second recognition terminal is connected to the serial clock line of the I2C bus.

[0013] In one embodiment, a battery management system is provided, the battery management system including: a battery protection circuit and the above-described reset circuit.

[0014] In one embodiment, a battery is provided, the battery including a housing, a battery body disposed within the housing, and a battery protection circuit board, the circuit layer of the battery protection circuit board including the aforementioned battery management system.

[0015] In one embodiment, an electrical device is provided, the electrical device including the battery described above.

[0016] The aforementioned reset circuit for a fuel gauge chip, battery management system, battery, and electrical device, when the fuel gauge chip malfunctions, the main control chip outputs a low-level signal to the signal recognition terminal of the dual-channel reset chip. Upon receiving the low-level signal, the dual-channel reset chip outputs a reset signal to the reset terminal of the fuel gauge chip. Upon receiving the reset signal, the fuel gauge chip performs a power-on / off reset, returning it to its initial normal state. This solves the problem that the main control chip's reset command cannot reset the fuel gauge chip to its initial normal state. It also avoids the complexity of disassembling the board for power-on / off reset operations and the possibility of battery failure due to fuel gauge chip malfunction, thus reducing costs to some extent. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model 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.

[0018] Figure 1 This is a schematic diagram of the reset circuit of a fuel gauge chip in one embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the reset circuit of another fuel gauge chip in one embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of the first communication line of the reset circuit being an I2C bus in one embodiment of the present invention;

[0021] Figure 4 This is one embodiment of the present invention.

[0022] Attached reference numerals: 1. Main control chip, 3. Dual-channel reset chip, 5. Fusion meter chip. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0024] It should be understood that this invention can be embodied in various forms and should not be construed as being limited to the embodiments set forth herein. Rather, providing these embodiments will make the disclosure thorough and complete, and will fully convey the scope of this invention to those skilled in the art. In the drawings, for clarity, the dimensions of layers and regions, as well as their relative dimensions, may be exaggerated. The same reference numerals denote the same elements throughout.

[0025] It should be understood that when an element or layer is referred to as "on," "adjacent to," "connected to," or "coupled to" other elements or layers, it may be directly on, adjacent to, connected to, or coupled to other elements or layers, or there may be intervening elements or layers. Conversely, when an element is referred to as "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" other elements or layers, there are no intervening elements or layers. It should be understood that although the terms first, second, third, etc., may be used to describe various elements, components, areas, layers, and / or portions, these elements, components, areas, layers, and / or portions should not be limited by these terms. These terms are only used to distinguish one element, component, area, layer, or portion from another element, component, area, layer, or portion. Therefore, without departing from the teachings of this utility model, the first element, component, area, layer, or portion discussed below may be referred to as the second element, component, area, layer, or portion.

[0026] Spatial relation terms such as “below,” “under,” “below,” “under,” “above,” “above,” etc., are used herein for convenience of description to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, then the element or feature described as “below,” “under,” or “below” other elements or features will be oriented “above” other elements or features. Therefore, the exemplary terms “below” and “under” can include both above and below orientations. The device may be otherwise oriented (rotated 90 degrees or otherwise) and the spatial descriptive terms used herein will be interpreted accordingly.

[0027] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. When used herein, the singular forms “a,” “an,” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising” and / or “including,” when used in this specification, identify the presence of the stated features, integers, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups. When used herein, the term “and / or” includes any and all combinations of the associated listed items.

[0028] To fully understand this utility model, detailed structures and steps will be presented in the following description to illustrate the technical solution proposed by this utility model. Preferred embodiments of this utility model are described in detail below; however, in addition to these detailed descriptions, this utility model may have other embodiments.

[0029] In one embodiment, a reset circuit for a fuel gauge chip is provided, the reset circuit comprising:

[0030] The main control chip 1 and the dual-channel reset chip 3 are connected. The main control chip 1 is connected to the fuel gauge chip 5 through a first communication line. The signal identification terminal RS of the dual-channel reset chip 3 is connected to the main control chip 1. The signal output terminal RST of the dual-channel reset chip 3 is connected to the reset terminal L1 of the fuel gauge chip 5.

[0031] The working process of the above reset circuit is as follows:

[0032] When the fuel gauge chip 5 malfunctions, the main control chip 1 outputs a low-level signal for a preset time to the signal recognition terminal RS of the dual-channel reset chip 3. The preset time can be 6 seconds, 7 seconds or 8 seconds, and can be adjusted as needed.

[0033] When the signal recognition terminal RS of the dual-channel reset chip 3 recognizes a continuous low-level signal, the signal output terminal RST of the dual-channel reset chip 3 outputs a low-level reset signal to the reset terminal L1 of the fuel meter chip 5.

[0034] When the reset terminal L1 of the fuel gauge chip 5 receives a low-level reset signal, it performs a power-on / off reset, which resets the fuel gauge chip 5 to its initial normal state.

[0035] In this embodiment, when the fuel gauge chip malfunctions, the main control chip outputs a low-level signal to the signal recognition terminal of the dual-channel reset chip. Upon receiving the low-level signal, the dual-channel reset chip outputs a reset signal to the reset terminal of the fuel gauge chip. Upon receiving the reset signal, the fuel gauge chip performs a power-on / off reset, returning it to its initial normal state. This solves the problem that the main control chip's reset command cannot reset the fuel gauge chip to its initial normal state. It also avoids the complexity of disassembling the board for power-on / off reset operations and the possibility of battery failure due to fuel gauge chip malfunction, thus reducing costs to some extent.

[0036] In one embodiment, such as Figure 2 As shown, the signal identification terminal RS of the dual-channel reset chip 3 is connected to the main control chip 1 through the first communication line.

[0037] The working process of the above reset circuit is as follows:

[0038] When the fuel gauge chip 5 malfunctions, the main control chip 1 outputs a low-level signal for a preset time through the first communication line. The preset time can be 6 seconds, 7 seconds or 8 seconds, and can be adjusted as needed.

[0039] When the signal recognition terminal RS of the dual-channel reset chip 3 recognizes a continuous low-level signal through the first communication line, the signal output terminal RST of the dual-channel reset chip 3 outputs a low-level reset signal to the reset terminal L1 of the fuel meter chip 5.

[0040] When the reset terminal L1 of the fuel gauge chip 5 receives a low-level reset signal, it performs a power-on / off reset, which resets the fuel gauge chip 5 to its initial normal state.

[0041] In this embodiment, the signal identification terminal of the dual-channel reset chip is connected to the main control chip via a first communication line. When the fuel gauge chip malfunctions, the main control chip outputs a low-level signal via the first communication line. Upon receiving this low-level signal, the signal identification terminal of the dual-channel reset chip outputs a reset signal to the reset terminal of the fuel gauge chip. Upon receiving the reset signal, the fuel gauge chip performs a power-on / off reset, returning it to its initial normal state. This solves the problem that the main control chip's reset command cannot reset the fuel gauge chip to its initial normal state. It also avoids the complexity of disassembling the board for power-on / off reset operations and the possibility of battery failure due to fuel gauge chip malfunction, thus reducing costs to some extent.

[0042] In one embodiment, such as Figure 1 As shown, the signal identification terminal RS of the dual-channel reset chip 3 is connected to the main control chip 1 through the second communication line.

[0043] The working process of the above reset circuit is as follows:

[0044] When the fuel gauge chip 5 malfunctions, the main control chip 1 outputs a low-level signal for a preset time to the signal recognition terminal RS of the dual-channel reset chip 3 through the second communication line. The preset time can be 6 seconds, 7 seconds or 8 seconds, and can be adjusted as needed.

[0045] When the signal recognition terminal RS of the dual-channel reset chip 3 recognizes a continuous low-level signal, the signal output terminal RST of the dual-channel reset chip 3 outputs a low-level reset signal to the reset terminal L1 of the fuel meter chip 5.

[0046] When the reset terminal L1 of the fuel gauge chip 5 receives a low-level reset signal, it performs a power-on / off reset, which resets the fuel gauge chip 5 to its initial normal state.

[0047] In this embodiment, the signal identification terminal of the dual-channel reset chip is connected to the main control chip via a second communication line. When the fuel gauge chip malfunctions, the main control chip outputs a low-level signal to the signal identification terminal of the dual-channel reset chip via the second communication line. Upon receiving the low-level signal, the dual-channel reset chip outputs a reset signal to the reset terminal of the fuel gauge chip. Upon receiving the reset signal, the fuel gauge chip performs a power-on / off reset, returning it to its initial normal state. This solves the problem that the main control chip's reset command cannot reset the fuel gauge chip to its initial normal state. It also avoids the complexity of disassembling the board for power-on / off reset operations and the possibility of battery failure due to fuel gauge chip malfunction, thus reducing costs to some extent.

[0048] In one embodiment, such as Figure 3 As shown, the first communication line includes an I2C bus.

[0049] The I2C bus uses only two lines: a data line (SDA) and a clock line (SCL). These two lines are connected to the power supply via pull-up resistors, keeping the bus high in the idle state. The I2C bus supports multiple master and multiple slave devices. Each device connected to the bus has a unique address, and any device can act as either a master or a slave, but only one master is allowed at a time, preventing data conflicts when multiple masters simultaneously request control of the bus. Furthermore, the clock synchronization mechanism allows devices with different speeds to work collaboratively on the same bus.

[0050] In this embodiment, the first communication line is set as an I2C bus, which reduces the number of pins and the complexity of PCB routing, lowers hardware costs, is easy to implement and maintain, and ensures the accuracy and consistency of data transmission by synchronizing data transmission with the clock.

[0051] In one embodiment, the reset terminal of the fuel gauge chip includes the power supply pin or the enable pin of the fuel gauge chip.

[0052] The reset pin of the fuel gauge chip can be either a power supply pin or an enable pin. Both can receive the reset signal from the dual-channel reset chip and perform a power-on / off reset operation to reset the fuel gauge chip to its initial normal state.

[0053] In this embodiment, a reset signal is transmitted to the power supply pin or enable pin of the fuel gauge chip. Upon receiving the reset signal, the fuel gauge chip performs a power-on / off reset, returning it to its initial normal state. This solves the problem that the main control chip's reset command cannot reset the fuel gauge chip to its initial normal state. It also avoids the complexity of disassembling the board for power-on / off reset operations and the possibility of battery failure due to fuel gauge chip malfunction, thus reducing costs to some extent.

[0054] In one embodiment, such as Figure 4 As shown, the second communication line includes an I2C bus.

[0055] In this embodiment, the second communication line is set as an I2C bus, which reduces the number of pins and the complexity of PCB routing, lowers hardware costs, is easy to implement and maintain, and ensures the accuracy and consistency of data transmission by synchronizing data transmission with the clock.

[0056] In one embodiment, such as Figure 3 As shown, the signal recognition terminals of the dual-channel reset chip 3 include a first signal recognition terminal RS0 and a second signal recognition terminal RS1. The first signal recognition terminal RS0 is connected to the serial data line SDA of the I2C bus, and the second recognition terminal RS1 is connected to the serial clock line SCL of the I2C bus.

[0057] Among them, such as Figure 1 As shown, in the first embodiment, the signal recognition terminal of the dual-channel reset chip is connected to the main control chip; while in this embodiment, the signal recognition terminal of the dual-channel reset chip is connected to the main control chip through the I2C bus, and the two are not contradictory.

[0058] The working process of the above reset circuit is as follows:

[0059] When the fuel gauge chip 5 malfunctions, the main control chip 1 outputs a low-level signal to the first signal recognition terminal RS0 of the dual-channel reset chip 3 through the serial data line SDA of the I2C bus, and outputs a continuous preset time signal to the second signal recognition terminal RS1 of the dual-channel reset chip 3 through the serial clock line SDA of the I2C bus. The preset time can be 6 seconds, 7 seconds or 8 seconds, and can be adjusted as needed.

[0060] When the dual-channel reset chip 3 detects a continuous low-level signal, the signal output terminal RST of the dual-channel reset chip 3 outputs a low-level reset signal to the reset terminal L1 of the fuel meter chip 5.

[0061] When the reset terminal L1 of the fuel gauge chip 5 receives a low-level reset signal, it performs a power-on / off reset, which resets the fuel gauge chip 5 to its initial normal state.

[0062] In this embodiment, the first signal identification terminal of the dual-channel reset chip is connected to the serial data line of the I2C bus, and the second identification terminal is connected to the serial clock line of the I2C bus. When the fuel gauge chip malfunctions, the main control chip outputs a low-level signal to the signal identification terminal of the dual-channel reset chip via the I2C bus. Upon receiving the low-level signal, the dual-channel reset chip outputs a reset signal to the reset terminal of the fuel gauge chip. Upon receiving the reset signal, the fuel gauge chip performs a power-on / off reset, restoring it to its initial normal state. This solves the problem that the main control chip's reset command cannot reset the fuel gauge chip to its initial normal state. It also avoids the complexity of disassembling the board for power-on / off reset operations and the possibility of battery failure due to fuel gauge chip malfunction, thus reducing costs to some extent.

[0063] In one embodiment, a battery management system is provided, the battery management system including: a battery protection circuit and the above-described reset circuit.

[0064] The battery protection circuit mainly includes a control module, a detection and protection module, and a communication module. The control module primarily analyzes and processes data from the battery protection circuit and issues control commands. The detection and protection module primarily detects voltage, current, and temperature within the battery protection circuit and takes appropriate action when these parameters exceed preset thresholds to prevent damage caused by circuit malfunctions. The communication module is primarily used to communicate with external devices to exchange data and achieve coordinated control. The battery protection circuit mentioned in this example is one embodiment; other modules may also be included in the battery protection circuit, all of which are within the protection scope of this utility model.

[0065] In this embodiment, a battery protection circuit and a reset circuit are set in the battery management system. The battery protection circuit protects the battery, and the reset circuit resets the fuel gauge chip when it malfunctions. This solves the problem that the reset command of the main control chip cannot reset the fuel gauge chip to its initial normal state. At the same time, it avoids the complexity of power-on and power-off reset operations and the phenomenon of battery failure due to fuel gauge chip disorder, thereby reducing the cost of the battery management system to a certain extent.

[0066] In one embodiment, a battery is provided, the battery including a housing, a battery body disposed within the housing, and a battery protection circuit board, the circuit layer of the battery protection circuit board including the aforementioned battery management system.

[0067] The battery protection circuit board is a PCB circuit board, and a circuit layer is set on the PCB circuit board, which includes the battery management system.

[0068] In this embodiment, a battery body and a battery protection circuit board are disposed inside the battery casing. A battery management system is disposed on the circuit layer of the battery protection circuit board. When the battery's fuel gauge chip malfunctions, it is reset. This solves the problem that the reset command of the main control chip cannot reset the fuel gauge chip to its initial normal state. At the same time, it avoids the complexity of disassembling the board and powering on / off to reset the battery and the phenomenon of battery failure due to disorder of the fuel gauge chip, thereby reducing the cost of the battery to a certain extent.

[0069] In one embodiment, an electrical device is provided, the electrical device including the battery described above.

[0070] The electrical equipment can be a mobile phone, computer, electric vehicle, car, etc., and other electrical equipment is also within the protection scope of this utility model. The aforementioned battery is installed inside the electrical equipment, and the battery is used to supply power to the electrical equipment.

[0071] In this embodiment, a battery is installed in the electrical device, and a reset is performed when the battery's fuel gauge chip malfunctions. This solves the problem that the reset command of the battery's main control chip cannot reset the fuel gauge chip to its initial normal state. At the same time, it avoids the complexity of manually performing power-on and power-off reset operations and the phenomenon of battery failure due to disorder of the fuel gauge chip in the battery, thereby reducing the cost of the electrical device to a certain extent.

[0072] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A reset circuit for a fuel gauge chip, characterized in that, The reset circuit includes: The system includes a main control chip and a dual-channel reset chip. The main control chip is connected to the fuel gauge chip via a first communication line. The signal identification terminal of the dual-channel reset chip is connected to the main control chip, and the signal output terminal of the dual-channel reset chip is connected to the reset terminal of the fuel gauge chip.

2. The reset circuit according to claim 1, characterized in that, The signal recognition terminal of the dual-channel reset chip is connected to the main control chip via the first communication line.

3. The reset circuit according to claim 1, characterized in that, The signal recognition terminal of the dual-channel reset chip is connected to the main control chip via a second communication line.

4. The reset circuit according to claim 1 or 2, characterized in that, The first communication line includes an I2C bus.

5. The reset circuit according to claim 1, characterized in that, The reset terminal of the fuel gauge chip includes the power supply pin or the enable pin of the fuel gauge chip.

6. The reset circuit according to claim 3, characterized in that, The second communication line includes an I2C bus.

7. The reset circuit according to claim 4, characterized in that, The dual-channel reset chip includes a first signal recognition terminal and a second signal recognition terminal. The first signal recognition terminal is connected to the serial data line of the I2C bus, and the second signal recognition terminal is connected to the serial clock line of the I2C bus.

8. A battery management system, characterized in that, The battery management system includes: a battery protection circuit and a reset circuit as described in any one of claims 1 to 7.

9. A battery, characterized in that, The battery includes a casing, a battery body disposed within the casing, and a battery protection circuit board, wherein the circuit layer of the battery protection circuit board includes the battery management system as described in claim 8.

10. An electrical appliance, characterized in that, The electrical device includes the battery as described in claim 9.

Images