charging and discharging device

Abstract

This utility model discloses a charging and discharging device, which includes a housing and a battery module disposed within the housing. The battery module includes a battery cell and a flexible packaging structure wrapped around the battery cell. It also includes a flexible thin-film pressure sensor, a temperature detection module, a charging and discharging management chip, an alarm module, and a main control module. The flexible thin-film pressure sensor is disposed between the flexible packaging structure and the inner wall of the housing, enabling the main control module to monitor the deformation of the battery cell in real time. At the same time, the temperature detection module detects the internal ambient temperature of the housing, providing dual safety monitoring for the charging and discharging device. When the battery cell deforms or the temperature is abnormal, the charging and discharging management chip is controlled to stop the charging and discharging process, and the alarm module indicates fault information to the user, thereby improving the safety and reliability of the charging and discharging device.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a charging and discharging device. Background Technology

[0002] With the widespread use of mobile devices and portable power banks, the market demand for battery-powered devices such as power banks is constantly growing. Currently, a large number of power banks on the market use pouch batteries. However, these batteries pose serious safety hazards when they bulge, expand, or are squeezed, especially the potential for accidents such as fires.

[0003] Traditional temperature detection technologies can only monitor temperature changes during battery use, but cannot effectively identify battery deformation risks (such as bulging or compression). Therefore, existing temperature detection technologies have limitations in dealing with battery deformation, failing to detect potential safety hazards in a timely manner, and thus failing to prevent safety accidents caused by battery deformation. Utility Model Content

[0004] This utility model provides a charging and discharging device to solve the problem of poor safety of existing charging and discharging devices.

[0005] A charging and discharging device includes a housing and a battery module disposed within the housing. The battery module includes a battery cell and a flexible packaging structure wrapped around the battery cell. It also includes a flexible thin-film pressure sensor, a temperature detection module, a charging and discharging management chip, an alarm module, and a main control module. The flexible film pressure sensor is disposed between the flexible packaging structure and the inner wall of the outer shell, and is used to output a pressure sensing signal when the flexible packaging structure deforms. The temperature detection module is used to detect the internal ambient temperature of the outer casing; The main control module is connected to the flexible thin film pressure sensor and is used to output a first charge / discharge control signal and a first alarm control signal based on the pressure sensing signal or the internal ambient temperature. The charge / discharge management chip is connected to the main control module and is used to connect the charge / discharge interface, the discharge interface and the battery cell. It is used to perform charge / discharge management according to the first charge / discharge control signal. The alarm module is mounted on the housing and connected to the main control module, and is used to perform alarm operations according to the first alarm control signal.

[0006] Furthermore, the flexible packaging structure includes an aluminum-plastic film.

[0007] Furthermore, the charging and discharging device also includes a battery protection module; the battery protection module is connected to the negative terminal of the battery cell and the system ground, and is used to detect the output current of the battery cell, and disconnect the negative terminal and the system ground when the output current is abnormal.

[0008] Furthermore, the alarm module includes an LED module and / or a buzzer.

[0009] Furthermore, the LED module includes a first LED and a second LED; the first LED is used to indicate a cell malfunction; and the second LED is used to indicate a temperature malfunction.

[0010] Furthermore, the alarm module also includes a display module; the display module is connected to the main control module and is used to display alarm information.

[0011] Furthermore, the charging and discharging device also includes a low-dropout voltage regulator; The input terminal of the low-dropout regulator is connected to the positive terminal of the battery cell, and the output terminal of the low-dropout regulator is connected to the main control module to supply power to the main control module.

[0012] Furthermore, the temperature detection module includes a thermistor.

[0013] Furthermore, the charging / discharging interface is a USB-C interface; the discharging interface is a USB-A interface.

[0014] Furthermore, the battery cell is a lithium-ion battery cell or a sodium-ion battery cell.

[0015] Furthermore, the main control module includes an MCU.

[0016] This utility model provides a charging and discharging device, which includes a housing and a battery module disposed within the housing. The battery module includes a battery cell and a flexible packaging structure wrapped around the battery cell. It also includes a flexible thin-film pressure sensor, a temperature detection module, a charging and discharging management chip, an alarm module, and a main control module. The flexible thin-film pressure sensor is disposed between the flexible packaging structure and the inner wall of the housing, and is used to output a pressure sensing signal when the flexible packaging structure deforms. The temperature detection module is used to detect the internal ambient temperature of the housing. The main control module is connected to the flexible thin-film pressure sensor and is used to output a first charging and discharging control signal and a first alarm control signal based on the pressure sensing signal or the internal ambient temperature. The charging and discharging management chip... The main control module is connected to the charging / discharging interface, the discharging interface, and the battery cell, and is used for charging / discharging management based on the first charging / discharging control signal. The alarm module is located on the outer casing and connected to the main control module. It is used to execute alarm operations based on the first alarm control signal. A flexible thin-film pressure sensor is installed between the soft packaging structure and the inner wall of the outer casing, so that the main control module can monitor the deformation of the battery cell in real time. At the same time, it combines the temperature detection module to detect the internal ambient temperature of the outer casing, and performs dual safety monitoring of the charging / discharging device. When the battery cell is deformed or the temperature is abnormal, the charging / discharging management chip is controlled to stop the charging / discharging process, and the alarm module indicates the fault information to the user, thereby improving the safety and reliability of the charging / discharging device. 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 a charging and discharging device in one embodiment of the present invention.

[0019] In the diagram: 1. Battery module; 11. Flexible packaging structure; 2. Flexible film pressure sensor; 3. Temperature detection module; 4. Charge / discharge management chip; 5. Alarm module; 51. LED module; 52. Buzzer; 53. Display module; 6. Main control module; 7. Battery protection module; 8. Low dropout voltage regulator. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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 “comprising,” when used in this specification, identify the presence of 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.

[0023] 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.

[0024] like Figure 1 As shown, this embodiment provides a charging and discharging device, including a housing (not shown) and a battery module 1 disposed within the housing. The battery module 1 includes a battery cell and a flexible packaging structure 11 wrapped around the battery cell. It also includes a flexible thin-film pressure sensor 2, a temperature detection module 3, a charging and discharging management chip 4, an alarm module 5, and a main control module 6. The flexible thin-film pressure sensor 2 is disposed between the flexible packaging structure 11 and the inner wall of the housing, and is used to output a pressure sensing signal when the flexible packaging structure 11 deforms. The temperature detection module 3 is used to detect the internal ambient temperature of the housing. The main control module 6 is connected to the flexible thin-film pressure sensor 2 and is used to output a first charging and discharging control signal and a first alarm control signal based on the pressure sensing signal or the internal ambient temperature. The charging and discharging management chip 4 is connected to the main control module 6 and is used to connect the charging and discharging interface, the discharging interface, and the battery cell, and is used to perform charging and discharging management based on the first charging and discharging control signal. The alarm module 5 is disposed on the housing and connected to the main control module 6, and is used to perform an alarm operation based on the first alarm control signal.

[0025] As an example, the battery module 1 of the charging and discharging device includes a battery cell, which may be a single cell or multiple cells. The battery cell is encapsulated in a flexible packaging structure 11. Exemplarily, the flexible packaging structure 11 is an aluminum-plastic film. The battery module 1 is mounted inside the housing of the charging and discharging device. Optionally, the housing may be made of metal or plastic to provide necessary physical protection.

[0026] As an example, the flexible thin-film pressure sensor 2 is installed between the flexible packaging structure 11 and the inner wall of the outer shell. It uses a highly sensitive thin-film material and can sense the pressure changes of the battery cell in real time. In particular, when the battery cell is deformed (such as bulging or compression), the flexible thin-film pressure sensor 2 can generate a corresponding electrical signal and transmit it to the main control module 6.

[0027] As an example, the temperature detection module 3 includes a thermistor or temperature sensor, which is installed inside the housing and near the battery module 1 to monitor the temperature of the battery module 1 and its surrounding environment. When the battery temperature rises abnormally, the main control module 6 can promptly control the charge / discharge management chip 4 to stop working and control the alarm module 5 to issue a warning signal.

[0028] As an example, the charge / discharge management chip 4 is connected to the main control module 6 and is used to connect the charge / discharge interface, the discharge interface and the battery cell. It is used to perform charge / discharge management according to the first charge / discharge control signal. When the battery cell bulges or is squeezed, or the internal ambient temperature is too high, the current charging or discharging process is stopped, thus cutting off the risk from the electrical source.

[0029] As an example, the alarm module 5 is mounted on the housing and connected to the main control module 6. It is used to perform an alarm operation based on the first alarm control signal, thereby clearly indicating the fault type to the user.

[0030] In this embodiment, the charging and discharging device includes a housing and a battery module 1 disposed within the housing. The battery module 1 includes a battery cell and a flexible packaging structure 11 wrapped around the battery cell. It also includes a flexible thin-film pressure sensor 2, a temperature detection module 3, a charging and discharging management chip 4, an alarm module 5, and a main control module 6. The flexible thin-film pressure sensor 2 is disposed between the flexible packaging structure 11 and the inner wall of the housing, and is used to output a pressure sensing signal when the flexible packaging structure 11 deforms. The temperature detection module 3 is used to detect the internal ambient temperature of the housing. The main control module 6 is connected to the flexible thin-film pressure sensor 2 and is used to output a first charging and discharging control signal and a first alarm control signal based on the pressure sensing signal or the internal ambient temperature. The charging and discharging management chip 4 and the main control module 6 are connected to the flexible thin-film pressure sensor 2. The main control module 6 is connected to the charging / discharging interface, the discharging interface, and the battery cell, and is used for charging / discharging management according to the first charging / discharging control signal. The alarm module 5 is installed on the outer shell and connected to the main control module 6. It is used to perform alarm operations according to the first alarm control signal. The flexible thin film pressure sensor 2 is installed between the soft packaging structure 11 and the inner wall of the outer shell, so that the main control module 6 can monitor the deformation of the battery cell in real time. At the same time, it combines the temperature detection module 3 to detect the internal ambient temperature of the outer shell, and performs dual safety monitoring of the charging / discharging device. When the battery cell is deformed or the temperature is abnormal, the charging / discharging management chip 4 is controlled to stop the charging / discharging process, and the alarm module 5 indicates the fault information to the user, thereby improving the safety and reliability of the charging / discharging device.

[0031] In one embodiment, the flexible packaging structure 11 includes an aluminum-plastic film. In this embodiment, the aluminum-plastic film packaging structure has good heat insulation, oxygen barrier, and moisture-proof properties, which can effectively protect the battery cell. Moreover, the flexibility of the aluminum-plastic film allows it to adapt to the deformation of the battery cell under different operating conditions, which helps to extend the battery life and reduce safety hazards caused by packaging material problems.

[0032] In one embodiment, the charging and discharging device further includes a battery protection module 7. The battery protection module 7 is connected to the negative terminal of the battery cell and system ground, and is used to detect the output current of the battery cell. When the output current is abnormal, it disconnects the negative terminal from the system ground. In this embodiment, the battery protection module 7 is connected between the negative terminal of the battery and system ground, and monitors the current output by the battery cell in real time. When the output current of the battery cell exceeds a preset safe current value, the battery protection module 7 automatically disconnects the connection between the negative terminal of the battery cell and system ground, thereby effectively preventing overcurrent damage to the battery cell.

[0033] In one embodiment, the alarm module 5 includes an LED module 51 and / or a buzzer 52. In this embodiment, the alarm module 5 warns the user through the LED module 51 and / or the buzzer 52. When the battery cell deforms or experiences abnormal temperature, the alarm module 5 displays different colors via the LED indicator or emits an alarm sound via the buzzer 52. For example, when the battery cell deforms, the LED module 51 may turn orange, and the buzzer 52 will emit a continuous alarm sound. When the battery temperature is too high, the LED module 51 may turn red, and the buzzer 52 will emit intermittent alarm sounds. This combined alarm design of LED display and buzzer 52 allows the user to perceive abnormal battery conditions through both visual and auditory means, enabling timely action to avoid safety accidents caused by battery cell problems. This makes the charging and discharging device more intelligent and safer.

[0034] In one embodiment, the LED module 51 includes a first LED and a second LED; the first LED indicates a cell malfunction; the second LED indicates a temperature malfunction. In this embodiment, the LED module 51 consists of LEDs of at least two colors. The first LED indicates a cell malfunction (such as bulging, short circuit, etc.), and the second LED indicates a temperature malfunction (such as overheating). When a cell malfunctions, the first LED lights up red; when a temperature malfunctions, the second LED lights up blue or green. By using different colored LED indicators, users can quickly understand the specific type of problem with the cell (such as cell malfunction or temperature malfunction), which not only improves the identifiability of alarm information but also allows users to quickly take measures in emergencies to prevent damage to the charging and discharging device or accidents.

[0035] In one embodiment, the alarm module 5 further includes a display module 53; the display module 53 is connected to the main control module 6 and is used to display alarm information. Exemplarily, the display module 53 includes a display screen. Optionally, the display screen can be an LCD liquid crystal display screen or an LED liquid crystal display screen. Exemplarily, in addition to controlling the display module 53 to display basic functions such as real-time cell power / charging / discharging power, the main control module 6 also displays the current temperature and pressure value of the cell in real time based on pressure sensing signals or internal ambient temperature. The main control module 6 determines the risk level based on the pressure sensing signals or internal ambient temperature, and then displays the content through the display module 53 to prompt the user.

[0036] In one embodiment, the charging and discharging device further includes a low-dropout regulator 8; the input terminal of the low-dropout regulator 8 is connected to the positive terminal of the battery cell, and the output terminal of the low-dropout regulator 8 is connected to the main control module 6 for supplying power to the main control module 6. Exemplarily, the low-dropout regulator 8 (LDO) is used to convert the voltage of the battery cell into a suitable operating voltage for the main control module 6. The input terminal of the LDO is connected to the positive terminal of the battery cell, and the output terminal is connected to the main control module 6, ensuring that the main control module 6 can obtain a stable voltage supply under various charging states. In this embodiment, the low-dropout regulator 8 ensures the stable operation of the main control module 6, ensuring that the charging and discharging device can continuously and stably monitor the battery status under various operating conditions.

[0037] In one embodiment, the temperature detection module 3 includes a thermistor. Exemplarily, the temperature detection module 3 uses a thermistor (NTC or PTC) to monitor the battery temperature in real time. It has high temperature sensitivity and low response time, and can monitor the temperature changes of the battery in real time, ensuring that an alarm can be issued or protective measures can be taken in time when the temperature is too high, thereby avoiding damage to the battery cell due to overheating or causing a safety accident.

[0038] In one embodiment, the charging / discharging interface is a USB-C interface; the discharging interface is a USB-A interface. Exemplarily, the charging interface uses a USB-C interface, and the discharging interface uses a USB-A interface. The USB-C interface supports reversible insertion and high-power input / output, meeting the fast charging requirements of the charging / discharging device. The USB-A interface provides good compatibility with existing electronic devices, outputting standard voltage and current to power devices such as mobile phones and tablets. The charging / discharging management chip 4 is connected to both the USB-C and USB-A interfaces to implement multi-standard charging / discharging control, ensuring broad compatibility with the vast majority of consumer electronics products, improving the versatility and user experience of the charging / discharging device while maintaining performance.

[0039] In one embodiment, the battery cell is a lithium-ion battery cell or a sodium-ion battery cell. In this embodiment, the battery cell can be a lithium-ion battery cell or a sodium-ion battery cell, which can be selected according to actual needs. The detection logic of the flexible thin-film pressure sensor 2 and the temperature detection module 3 can be adapted to different types of battery cells, and only parameter adjustments are needed in the software layer of the main control module 6.

[0040] In one embodiment, the main control module 6 includes an MCU. In this embodiment, by using an MCU as the main control module 6, highly flexible signal processing and logic control can be achieved. It can make judgments based on multi-dimensional data of the cell status (pressure, temperature, current, etc.) and it is also easy to expand functions through firmware upgrades, such as adding management algorithms for different cells.

[0041] The above 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 charge and discharge device comprising a housing and a battery module provided in the housing, the battery module comprising a battery cell and a soft package encapsulation structure wrapped on the battery cell, characterized in that, It also includes a flexible thin-film pressure sensor, a temperature detection module, a charge / discharge management chip, an alarm module, and a main control module; The flexible film pressure sensor is disposed between the flexible packaging structure and the inner wall of the outer shell, and is used to output a pressure sensing signal when the flexible packaging structure deforms. The temperature detection module is used to detect the internal ambient temperature of the outer casing; The main control module is connected to the flexible thin film pressure sensor and is used to output a first charge / discharge control signal and a first alarm control signal based on the pressure sensing signal or the internal ambient temperature. The charge / discharge management chip is connected to the main control module and is used to connect the charge / discharge interface, the discharge interface and the battery cell. It is used to perform charge / discharge management according to the first charge / discharge control signal. The alarm module is mounted on the housing and connected to the main control module, and is used to perform alarm operations according to the first alarm control signal.

2. The charge and discharge device according to claim 1, wherein The flexible packaging structure includes an aluminum-plastic film.

3. The charge and discharge device according to claim 1, wherein The charging and discharging device also includes a battery protection module; the battery protection module is connected to the negative terminal of the battery cell and the system ground, and is used to detect the output current of the battery cell, and disconnect the negative terminal and the system ground when the output current is abnormal.

4. The charge and discharge device according to claim 1, wherein The alarm module includes an LED module and / or a buzzer.

5. The charge and discharge device according to claim 4, wherein The LED module includes a first LED and a second LED; the first LED is used to indicate a cell malfunction; the second LED is used to indicate a temperature malfunction.

6. The charge and discharge device according to claim 4, wherein The alarm module also includes a display module; the display module is connected to the main control module and is used to display alarm information.

7. The charge and discharge device according to claim 1, wherein The charging and discharging device also includes a low-dropout voltage regulator; The input terminal of the low-dropout regulator is connected to the positive terminal of the battery cell, and the output terminal of the low-dropout regulator is connected to the main control module to supply power to the main control module.

8. The charge and discharge device according to claim 1, wherein The temperature detection module includes a thermistor.

9. The charge and discharge device according to claim 1, wherein The charging / discharging interface is a USB-C interface; the discharging interface is a USB-A interface.

10. The charge and discharge device according to claim 1, wherein The battery cell is a lithium-ion battery cell or a sodium-ion battery cell.

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