Battery charging and discharging system with monitoring function

Abstract

The utility model discloses a battery charging and discharging system with a monitoring function, which comprises an energy storage battery module and a monitoring module, the monitoring module is used for monitoring and protecting the energy storage battery module during charging and discharging, and the monitoring module comprises a direct current power supply unit, an electric signal sampling unit, a thermal imaging unit, a control processor and a wireless communication unit. The thermal imaging data of the energy storage battery module and the charging and discharging control circuit board of the battery charging and discharging system can be acquired in real time through the thermal imaging unit, so that security and protection monitoring can be performed on the battery charging and discharging system according to the thermal imaging data, and the security and protection level of the energy storage battery in the charging and discharging process is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electrical safety for energy storage batteries, and in particular to a battery charging and discharging system with monitoring function. BACKGROUND

[0002] With the increasing development of the new energy industry, various portable power sources and energy storage power sources have emerged. In order to allow energy storage products to operate more diversely while ensuring safe operation, monitoring functions need to be added to battery charging and discharging devices. Due to differences in the use environment and power size of energy storage products (such as portable power banks, portable outdoor power sources, and large industrial and commercial energy storage), different monitoring methods are used. Generally, passive protection is used, that is, overvoltage or overcurrent protection is performed through a hardware circuit. When the working environment changes (for example, when the environmental temperature is too low or too high) or the hardware circuit fails, the charging and discharging protection circuit will fail. For example, temperature monitoring is generally achieved through a temperature sensor. However, due to limitations such as the monitoring position and number of temperature sensors, the actual temperatures of the energy storage battery and the function circuits of the charging and discharging circuit cannot be accurately determined. If the temperature sensor fails (fails or is damaged), the temperature monitoring function will fail and it is difficult to detect. SUMMARY

[0003] The technical problem to be solved by the present application is how to improve the safety of the battery charging and discharging system.

[0004] According to a first aspect, in an embodiment, a battery charging and discharging system with monitoring function is provided, comprising an energy storage battery module and a monitoring module, the monitoring module being used for monitoring and protecting the energy storage battery module during charging and discharging.

[0005] The monitoring module comprises a direct current power supply unit, an electrical signal sampling unit, a thermal imaging unit, a control processor, and a wireless communication unit.

[0006] The direct current power supply unit is used to obtain electrical energy from the energy storage battery module and provide working power for the monitoring module.

[0007] The electrical signal sampling unit is used to monitor the charging and discharging parameters of each battery unit in the energy storage battery module and send the obtained charging and discharging parameters to the control processor. The charging and discharging parameters include the voltage, current, power, and / or temperature of each battery unit.

[0008] The thermal imaging unit is used to obtain thermal imaging data of the energy storage battery module and the charging and discharging control circuit board of the battery charging and discharging system and send the thermal imaging data to the control processor.

[0009] The control processor is connected with the wireless communication unit; the control processor is used for sending the thermal imaging data and the charge-discharge parameter to a cloud monitoring server through the wireless communication unit; the cloud monitoring server is used for storing or forwarding the thermal imaging data and the charge-discharge parameter to a preset monitoring data display terminal.

[0010] In an embodiment, the battery charge-discharge system further comprises a charge-discharge module arranged on the charge-discharge control circuit board.

[0011] The charge-discharge module comprises an AC-DC conversion circuit and a charge-discharge conversion circuit.

[0012] The AC-DC conversion circuit is used for connecting an external AC power supply and converting AC power input by the AC power supply into DC power and outputting the DC power to the charge-discharge conversion circuit.

[0013] The charge-discharge conversion circuit is used for outputting the DC power output by the AC-DC conversion circuit to the energy storage battery module for charging the energy storage battery module; the charge-discharge conversion circuit is also used for outputting the DC power output by the energy storage battery module as an output power supply for discharging the energy storage battery module.

[0014] In an embodiment, the control processor is further connected with the charge-discharge conversion circuit, and the control processor is further used for controlling the charging or discharging of the energy storage battery module through the charge-discharge conversion circuit.

[0015] In an embodiment, the charge-discharge conversion circuit comprises a USB charge-discharge circuit, and the control processor is connected with the charge-discharge conversion circuit through a USB interface of the USB charge-discharge circuit.

[0016] In an embodiment, the monitoring module further comprises a storage unit connected with the control processor, and used for storing the thermal imaging data and the charge-discharge parameter when the wireless communication unit of the monitoring module is offline.

[0017] In an embodiment, the monitoring module further comprises a GPS positioning unit used for positioning the battery charge-discharge system.

[0018] In an embodiment, the monitoring module further comprises an audio circuit unit connected with the control processor; the audio circuit unit comprises an audio acquisition circuit and an audio playback circuit; the audio acquisition circuit is used for listening to the working environment sound of the battery charge-discharge system; and the audio playback circuit is used for playing a preset prompt sound.

[0019] In an embodiment, the wireless communication unit comprises a wifi circuit, a Bluetooth circuit and / or a radio frequency circuit.

[0020] In an embodiment, the monitoring module further comprises a video acquisition unit configured to monitor the battery charging and discharging system to obtain video data containing the energy storage battery module and the charging and discharging control circuit board.

[0021] In an embodiment, the battery charging and discharging system further comprises a monitoring data display terminal configured to obtain the thermal imaging data and the charging and discharging parameters from the cloud monitoring server and display.

[0022] According to the battery charging and discharging system of the above-mentioned embodiments, the battery charging and discharging system is monitored according to the thermal imaging data, which greatly improves the safety protection level of the energy storage battery during the charging and discharging process. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a structural block diagram of a battery charging and discharging system according to an embodiment. DETAILED DESCRIPTION

[0024] The application will be further described in detail through specific embodiments and drawings. In different embodiments, similar elements are denoted by similar reference numerals. In the following embodiments, many details are described in order to make the application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different cases, or can be replaced by other elements, materials or methods. In some cases, some operations related to the application are not shown or described in the specification in order to avoid the core part of the application being overwhelmed by too much description, and it is not necessary to describe these related operations in detail for those skilled in the art according to the description in the specification and general technical knowledge in the art.

[0025] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. At the same time, the steps or actions in the method description can also be sequentially adjusted or adjusted in a manner that is obvious to those skilled in the art. Therefore, the order in the specification and drawings is only for the purpose of clearly describing a certain embodiment, and does not mean that it is the necessary order, unless otherwise stated that a certain order must be followed.

[0026] In this paper, the serial numbers of components, such as "first", "second", etc., are only used to distinguish the described objects, and have no order or technical meaning. Unless otherwise specified, "connection" and "coupling" in this application include direct and indirect connection (coupling).

[0027] In the prior art, the charge and discharge protection of the energy storage battery is passive protection, that is, overvoltage or overcurrent protection is performed through a hardware circuit. When the working environment changes (for example, when the ambient temperature is too low or too high) or the hardware circuit fails, the charge and discharge protection circuit will be invalid. Temperature monitoring is an important part of the charge and discharge protection circuit, and is generally achieved through a temperature sensor. However, due to the limitations of the monitoring position and number of the temperature sensor, the temperature change trend of the energy storage battery and the charge and discharge circuit cannot be determined.

[0028] In the embodiments of the present application, the battery charge and discharge system is monitored according to thermal imaging data, converting passive protection to active protection according to thermal imaging, greatly improving the safety protection level of the charge and discharge of the energy storage battery.

[0029] Embodiment one:

[0030] Please refer to Figure 1 is a structural block diagram of a battery charge and discharge system in an embodiment. The battery charge and discharge system includes an energy storage battery module 2 and a monitoring module 1, and the monitoring module 1 is used for monitoring and protecting the energy storage battery module 2 during charge and discharge. The monitoring module 1 includes a direct current power supply unit 11, an electrical signal sampling unit 12, a thermal imaging unit 13, a control processor 10, and a wireless communication unit 14. The direct current power supply unit 11 is used to obtain electrical energy from the energy storage battery module 2 and provide working power to the monitoring module 1. The electrical signal sampling unit 12 is used to monitor the charge and discharge parameters of each battery unit in the energy storage battery module 11 and send the obtained charge and discharge parameters to the control processor 10. The charge and discharge parameters include the voltage, current, power, and / or temperature value of each battery unit. The thermal imaging unit 13 is used to obtain thermal imaging data of the energy storage battery module 2 and the charge and discharge control circuit board of the battery charge and discharge system and send the thermal imaging data to the control processor 10. The control processor 10 is connected with the wireless communication unit 14, and the control processor 10 is used to send the thermal imaging data and the charge and discharge parameters to a cloud monitoring server 3 through the wireless communication unit 14. The cloud monitoring server 3 is used to store or forward the thermal imaging data and the charge and discharge parameters to a preset monitoring data display terminal 5.

[0031] In an embodiment, the battery charging and discharging system further comprises a charging and discharging module 4 disposed on the charging and discharging control circuit board. The charging and discharging module 4 comprises an AC-DC conversion circuit 41 and a charging and discharging conversion circuit 42. The AC-DC conversion circuit 41 is configured to be connected to an external AC power supply and convert AC power input by the AC power supply into DC power and output the DC power to the charging and discharging conversion circuit 42. The charging and discharging conversion circuit 42 is configured to output the DC power output by the AC-DC conversion circuit 41 to the energy storage battery module 2, so as to charge the energy storage battery module 2. The charging and discharging conversion circuit 42 is also configured to output the DC power output by the energy storage battery module 2 as an output power supply, so as to discharge the energy storage battery module 2. The control processor 10 is further connected to the charging and discharging conversion circuit 42, and the control processor 10 is further configured to control charging or discharging of the energy storage battery module 2 through the charging and discharging conversion circuit 42. In an embodiment, the charging and discharging conversion circuit 42 comprises a USB charging and discharging circuit, and the control processor 10 is connected to the charging and discharging conversion circuit 42 through a USB interface of the USB charging and discharging circuit.

[0032] In an embodiment, the monitoring module 1 further comprises a storage unit 15 connected to the control processor 10, and the storage unit 15 is configured to store thermal imaging data and charging and discharging parameters when the wireless communication unit 14 of the monitoring module 1 is offline. In an embodiment, the monitoring module 1 further comprises a GPS positioning unit 16 configured to position the battery charging and discharging system. In an embodiment, the monitoring module 1 further comprises an audio circuit unit 17 connected to the control processor 10. The audio circuit unit 17 comprises an audio acquisition circuit and an audio playback circuit. The audio acquisition circuit is configured to listen to the sound of the working environment of the battery charging and discharging system, and the audio playback circuit is configured to play a preset prompt sound. In an embodiment, the wireless communication unit 14 comprises a wifi circuit, a Bluetooth circuit and / or a radio frequency circuit. In an embodiment, the monitoring module 1 further comprises a video acquisition unit 18 configured to monitor the battery charging and discharging system to obtain video data containing the energy storage battery module 2 and the charging and discharging control circuit board.

[0033] In an embodiment, the battery charging and discharging system further comprises a monitoring data display terminal 5 configured to obtain and display the thermal imaging data and the charging and discharging parameters from the cloud monitoring server 3.

[0034] In order to facilitate understanding of the application scenarios and implementation manners of the battery charging and discharging system in the embodiments of the present application, the following describes specific embodiments, which specifically include:

[0035] As Figure 1As shown, the electric signal sampling unit 12 (using AFE monitoring device) is connected with the energy storage battery module 2 (Battery) through sampling lines and voltage points and temperature points, and the electric signal sampling unit 12 is connected with the control processor 10 (Microcontroller Unit, MCU) through I2C communication. The energy storage battery module 2 is connected with the direct current power supply unit 11 (DC-DC circuit), the direct current power supply unit 11 provides working power for each unit of the monitoring module 1, the GPS positioning unit 16 (GPS positioning circuit), the wireless communication unit 14 (WiFi circuit), the video acquisition unit 18 (video camera), the thermal imaging unit 13 (thermal imager), the audio circuit unit 17 (sound pickup and power amplifier circuit), the storage unit 15 (FLASH memory) and the charge and discharge conversion circuit 42 (USB charge and discharge circuit) are connected with the MCU, wherein the WiFi circuit is in communication connection with the cloud monitoring server, and the alternating current-dc conversion circuit 41 (AC-DC circuit) inputs the commercial power of 220 or 380V alternating current. The AFE monitoring device comprehensively samples and protects the battery, and can use SH367XXX series chips to comprehensively control the single voltage, balance, current flowing through and temperature. The DC-DC circuit uses MPS series power supply chips, and selects a scheme of transformer isolation multi-voltage and continuous 3A current. The AC-DC circuit provides direct current for the USB charge and discharge circuit, adopts a step-down topology, and gives the charge and discharge conversion circuit 42 according to the preset voltage and current of the output. The MCU selects the ST series. The USB charge and discharge circuit provides charging support for the energy storage battery module 2, the internal drive of the USB charge and discharge circuit is judged by the MCU, and the specific circuit can be realized by using MOS tubes or MOS tubes, and the number and parameters are judged by the preset current and voltage values. The GPS positioning circuit uses ATGM series to obtain position information, the WiFi circuit uses ESP series, the video camera uses OV series sensor, and in actual application, the storage unit is also used to store the preset internal program.

[0036] When the battery charge and discharge system with monitoring function is set to be used at a fixed place (fixed point mode), the specific working process includes:

[0037] Hardware starts, judges whether there is a hardware activation signal (or short press button), if there is an activation signal, directly control the DC-DC circuit enable end, the DC-DC circuit starts working, and each unit of the monitoring module 1 is powered, wherein the MCU, the GPS positioning circuit, the WiFi circuit, the video camera, the thermal imager, the sound pickup, the power amplifier circuit and the FLASH memory are in working state, the MCU self-locks the DC-DC circuit enable end, and stabilizes the DC-DC circuit working. On the contrary, it does not work.

[0038] Confirm the working state, the MCU activates the AFE monitoring device, the AFE monitoring device is in working state, detects whether the battery has a fault, if not, communicates with the MCU through I2C communication, the MCU judges to open the USB charging and discharging circuit, the external can charge and discharge, otherwise the charging and discharging tube is not opened, and charging and discharging cannot be performed. The MCU communicates with the GPS positioning circuit through TTL, obtains the latitude and longitude information, and stores it in the FLASH memory. The MCU communicates with the Camera (video camera) through TTL, obtains image data, and stores it in the FLASH memory. The MCU communicates with the audio circuit unit through TTL, obtains audio data, and stores it in the FLASH memory.

[0039] Data upload, the MCU communicates with the WiFi circuit through TTL, opens the transmission mode, connects to the router WiFi, and then transmits the data stored in the FLASH memory (including battery parameter data, position data, image data and audio data, etc.) to the cloud monitoring server for real-time decoding.

[0040] Monitoring display, the monitoring data display terminal obtains and displays various data from the cloud monitoring server.

[0041] When the battery charging and discharging system with monitoring function needs to be used in mobile mode, dynamic connection or timing communication needs to be performed on the video camera, audio circuit unit, WiFi circuit and GPS positioning circuit. The specific working process includes:

[0042] Hardware startup, same as the fixed point mode.

[0043] Confirm the working state, same as the fixed point mode.

[0044] Timing data acquisition or update, determine whether there is a hardware activation signal (or long press key), if there is an activation signal, the MCU communicates with the GPS positioning circuit through TTL, obtains the latitude and longitude information, and stores it in the FLASH memory. The MCU communicates with the video camera through TTL, obtains image data, and stores it in the FLASH memory. The MCU communicates with the audio circuit unit through TTL, obtains audio data, and stores it in the FLASH memory, otherwise, no data update is performed.

[0045] Data upload, the MCU communicates with the WiFi circuit through TTL, opens the transmission mode, connects to the router WiFi, and then transmits the data stored in the FLASH memory to the cloud monitoring server for real-time decoding.

[0046] Monitoring display, the monitoring data display terminal obtains and displays various data from the cloud monitoring server.

[0047] In an embodiment, the monitoring data display terminal is a smart mobile terminal, and various data obtained from the cloud monitoring server is realized through an APP software running on the smart mobile terminal. In an embodiment, the smart mobile terminal can also be used to reversely set the charge-discharge power of the battery charge-discharge system, so as to improve the safety and reliability of the battery charge-discharge system.

[0048] The battery charge-discharge system disclosed in the embodiment comprises a storage battery module and a monitoring module for monitoring and protecting the storage battery module during charge and discharge. The monitoring module comprises a direct current power supply unit, an electric signal sampling unit, a thermal imaging unit, a control processor and a wireless communication unit. The thermal imaging data of the storage battery module and the charge-discharge control circuit board of the battery charge-discharge system can be obtained in real time through the thermal imaging unit, so that the security monitoring of the battery charge-discharge system can be realized according to the thermal imaging data, and the safety protection level of the storage battery during charge and discharge is greatly improved.

[0049] The above application of specific examples is used to help understand the present application and does not limit the present application. For those skilled in the art to which the present application belongs, according to the idea of the present application, several simple deductions, deformations or substitutions can be made.

Claims

1. A battery charging and discharging system with a monitoring function, characterized by, The application relates to a battery charging and discharging system, which comprises a storage battery module and a monitoring module for monitoring and protecting the storage battery module during charging and discharging. The monitoring module comprises a direct-current power supply unit, an electric signal sampling unit, a thermal imaging unit, a control processor and a wireless communication unit. The direct-current power supply unit is used for obtaining electric energy from the storage battery module and providing working power for the monitoring module. The electric signal sampling unit is used for monitoring charging and discharging parameters of each battery unit in the storage battery module and sending the obtained charging and discharging parameters to the control processor; the charging and discharging parameters include voltage, current, electric quantity and / or temperature value of each battery unit. The thermal imaging unit is used for obtaining thermal imaging data of the storage battery module and the charging and discharging control circuit board of the battery charging and discharging system and sending the thermal imaging data to the control processor. The control processor is connected with the wireless communication unit; the control processor is used for sending the thermal imaging data and the charging and discharging parameters to a cloud monitoring server through the wireless communication unit; the cloud monitoring server is used for storing or forwarding the thermal imaging data and the charging and discharging parameters to a preset monitoring data display terminal.

2. The battery charging and discharging system of claim 1, wherein, The application further comprises a charging and discharging module arranged on the charging and discharging control circuit board. The charging and discharging module comprises an alternating current-direct current conversion circuit and a charging and discharging conversion circuit. The alternating current-direct current conversion circuit is used for connecting an alternating current power supply and converting alternating current input by the alternating current power supply into direct current and then outputting the direct current to the charging and discharging conversion circuit. The charging and discharging conversion circuit is used for outputting direct current output by the alternating current-direct current conversion circuit to the storage battery module for charging the storage battery module; the charging and discharging conversion circuit is also used for outputting direct current output by the storage battery module as output power for discharging the storage battery module.

3. The battery charging and discharging system of claim 2, wherein, The control processor is also connected with the charging and discharging conversion circuit; the control processor is also used for controlling charging or discharging of the storage battery module through the charging and discharging conversion circuit.

4. The battery charging and discharging system of claim 3, wherein, The charging and discharging conversion circuit comprises a USB charging and discharging circuit and is connected with the control processor through a USB interface of the USB charging and discharging circuit.

5. The battery charging and discharging system of claim 1, wherein, The monitoring module further comprises a storage unit connected with the control processor and used for storing the thermal imaging data and the charging and discharging parameters when the wireless communication unit of the monitoring module is offline.

6. The battery charging and discharging system of claim 1, wherein, The monitoring module further comprises a GPS positioning unit used for positioning the battery charging and discharging system.

7. The battery charging and discharging system of claim 1, wherein, The monitoring module further comprises an audio circuit unit connected with the control processor; the audio circuit unit comprises an audio acquisition circuit and an audio playing circuit; the audio acquisition circuit is used for listening to working environment sound of the battery charging and discharging system; and the audio playing circuit is used for playing a preset prompt sound.

8. The battery charging and discharging system of claim 1, wherein, The wireless communication unit comprises a wifi circuit, a Bluetooth circuit and / or a radio frequency circuit.

9. The battery charging and discharging system of claim 1, wherein, The monitoring module further comprises a video acquisition unit used for monitoring the battery charging and discharging system to obtain video data containing the storage battery module and the charging and discharging control circuit board.

10. The battery charging and discharging system of claim 1, wherein, The monitoring data display terminal is used to acquire the thermal imaging data and the charging and discharging parameters from the cloud monitoring server and display.

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