Battery device and battery state monitoring system

Abstract

The invention provides a battery device. The battery device comprises a battery module; the control unit is coupled with the battery module and is used for executing a working state extraction operation, and the working state extraction operation comprises the following steps: judging whether the battery module is abnormal or not according to at least one working state parameter of the battery module, if not, executing a first extraction operation, and if yes, executing a second extraction operation; wherein the first extraction operation is to read a sampling value of the at least one working state parameter of the battery module according to a first frequency; the second extraction operation is to read a sampling value of the at least one working state parameter of the battery module according to a second frequency, and the second frequency is higher than the first frequency.

Description

Technical Field

[0001] This invention relates to battery devices, and more particularly to a battery device and battery status monitoring system capable of monitoring the operating status of a battery. Background Technology

[0002] Rechargeable battery devices are widely used in transportation vehicles, such as electric bicycles or electric vehicles.

[0003] However, typical battery management systems (BMS) only continuously monitor battery voltage, current, and temperature to alert and protect against detected faults, without continuously recording battery operational history data. Therefore, typical BMS systems cannot analyze the root causes of battery failures using this operational history data.

[0004] To address the aforementioned problems, there is an urgent need in this field for a novel battery device and battery status monitoring system. Summary of the Invention

[0005] The main objective of this invention is to provide a battery device that can read the operating status parameters of the battery module at a lower sampling frequency when the battery module is not malfunctioning, and at a higher sampling frequency when the battery module malfunctions, thereby saving power consumption and extracting the detailed operating status history of the battery module when malfunctions.

[0006] Another object of the present invention is to provide a battery device that can determine whether to store the current sampled value by judging whether there is a meaningful difference between the current sampled value and the previous sampled value of the operating state parameter, thereby effectively saving the storage space of the storage unit.

[0007] Another objective of this invention is to provide a battery status monitoring system that can perform a battery operating history analysis on the operating status parameter data stored in the storage unit through an information processing device, so as to help engineers understand the operating history of the battery module and thus determine the remaining battery cycle life or the cause of failure of the battery module.

[0008] Another objective of this invention is to provide a battery status monitoring system, which can use an information processing device to plot the working history of a battery module into a curve and display it on a screen, so as to facilitate engineers to interpret the working history of the battery module.

[0009] To achieve the above objectives, a battery device is proposed, which has:

[0010] A battery module; and

[0011] A control unit, coupled to the battery module, is used to perform an operating state extraction operation, the operating state extraction operation including:

[0012] Determine whether the battery module is malfunctioning based on at least one operating status parameter of the battery module. If not, perform a first extraction operation; if yes, perform a second extraction operation.

[0013] The first extraction operation involves reading the sampled value of at least one operating state parameter of the battery module at a first frequency; the second extraction operation involves reading the sampled value of at least one operating state parameter of the battery module at a second frequency, wherein the second frequency is higher than the first frequency.

[0014] In one embodiment, the first extraction operation further includes:

[0015] The sampled value of at least one operating state parameter is written into a first storage unit; and

[0016] When the difference between the current value of the sampled value of at least one operating state parameter and the previous first value exceeds a preset range, the current value of the sampled value of the at least one operating state parameter is written into a second storage unit.

[0017] In one embodiment, the second extraction operation further includes:

[0018] When the difference between the current value and the previous value of the sampled value of at least one working state parameter exceeds a preset range, the current value of the sampled value of the at least one working state parameter is written into the first storage unit.

[0019] In one embodiment, the second extraction operation further includes:

[0020] When the difference between the current value of the sampled value of at least one working state parameter and the previous Nth value exceeds the preset range, the current value of the sampled value of the at least one working state parameter is written into the second storage unit, where N is an integer greater than 1.

[0021] In one embodiment, the battery module has a communication interface for communicating with the control unit.

[0022] In one embodiment, the communication interface may be a USB interface, Bluetooth interface, WiFi interface, RS232 interface, RS485 interface or Type-C interface.

[0023] In a possible embodiment, the at least one operating state parameter may include at least one of voltage, current, and temperature.

[0024] In one embodiment, the battery device further includes a third storage unit for storing the time when the battery module malfunctions and the current value of the sampled value of the at least one operating state parameter corresponding to that time.

[0025] To achieve the above objectives, the present invention further proposes a battery status monitoring system, which includes an information processing device and a battery device as described above, wherein the information processing device is used to perform a battery operating history analysis on the data stored in the first storage unit or the second storage unit.

[0026] In one embodiment, the battery operating history analysis includes: determining the number of times the battery module operates, the operating mode, the duration of operation, and the operating temperature based on the data stored in the first storage unit or the second storage unit.

[0027] In one embodiment, the battery operating history analysis further includes: plotting a curve based on the number of times the battery module operates, the operating mode, the duration of operation, and the operating temperature, and displaying it on a screen.

[0028] To further understand the structure, features, purpose, and advantages of the present invention, detailed descriptions of preferred embodiments are provided below, accompanied by accompanying drawings. Attached Figure Description

[0029] Figure 1 This is a block diagram of an embodiment of the battery device of the present invention;

[0030] Figure 2 A flowchart illustrating an embodiment of the battery device's operating state extraction operation according to the present invention;

[0031] Figure 3 This is a block diagram of an embodiment of the battery state monitoring system of the present invention;

[0032] Figure 4a for Figure 2 A voltage and temperature profile of the battery module in the battery device; and

[0033] Figure 4b for Figure 2 The voltage and current curves of the battery module in the battery device.

[0034] The meanings of the reference numerals in the above figures are as follows:

[0035] 100: Battery device

[0036] 110: Battery Module

[0037] 111: Communication Interface

[0038] 120: Control Unit

[0039] 131: First storage unit

[0040] 132: Second storage unit

[0041] 200: Battery Status Monitoring System

[0042] 210: Battery device

[0043] 220: Information processing device

[0044] Step a: Perform a sampling operation.

[0045] Step b: Perform a storage operation. Detailed Implementation

[0046] The main principle of this invention is as follows:

[0047] 1. Read the battery module's operating status parameters at a lower sampling frequency when the battery module is not malfunctioning, and read the battery module's operating status parameters at a higher sampling frequency when the battery module malfunctions.

[0048] 2. Determine whether there is a meaningful difference between the current sampled value and the previous sampled value of the working status parameter to decide whether to store the current sampled value; and

[0049] 3. Using an information processing device to determine the charging and discharging events of the working status parameter data stored in the storage unit to obtain a battery working history, and plotting the battery working history into a curve and displaying it on a screen.

[0050] Accordingly, the present invention can save power consumption and storage space of the storage unit, and can present the working state process of the battery module when an abnormality occurs in detail, so that engineers can determine the remaining battery cycle life or the cause of failure of the battery module based on the working process of the battery module.

[0051] Figure 1 This is a block diagram of an embodiment of the battery device of the present invention. Figure 1 As shown, a battery device 100 includes a battery module 110, a control unit 120, a first storage unit 131, and a second storage unit 132. The battery module 110 has a communication interface 111 for communicating with the control unit 120.

[0052] The battery module 110 has at least one battery and at least one sensing unit for sensing at least one operating state parameter, wherein the battery may be a lithium-ion battery, a lithium iron phosphate battery, or a nickel-metal hydride battery; the at least one operating state parameter may include at least one of voltage, current, and temperature. Since the sensing units for voltage, current, and temperature are prior art, their partial structures will not be described in detail here.

[0053] The control unit 120 is coupled to the battery module 110 via the communication interface 111 and is used to perform a working status extraction operation. The control unit 120 may have a microprocessor. The communication interface 111 may be a USB interface, Bluetooth interface, WiFi interface, RS232 interface, RS485 interface or Type-C interface.

[0054] In detail, the working status extraction operation includes a sampling operation and a storage operation. Figure 2 This is a flowchart of an embodiment of the battery device's operating state extraction operation according to the present invention.

[0055] like Figure 2 As shown, the working state extraction operation includes: performing a sampling operation (step a); and performing a storage operation (step b).

[0056] In detail, step a includes:

[0057] (i) Determine whether the battery module 110 is malfunctioning based on at least one operating state parameter of the battery module 110. If not, perform a first extraction operation; if yes, perform a second extraction operation. The first extraction operation is to read the sampled value of the at least one operating state parameter of the battery module 110 at a first frequency. The second extraction operation is to read the sampled value of the at least one operating state parameter of the battery module 110 at a second frequency, where the second frequency is higher than the first frequency.

[0058] (ii) The first extraction operation further includes: writing the sampled value of the at least one operating state parameter into the first storage unit 131; and when the difference between the current value of the sampled value of the at least one operating state parameter and the previous first value exceeds a preset range, writing the current value of the sampled value of the at least one operating state parameter into the second storage unit 132; and

[0059] (iii) The second extraction operation further includes: when the difference between the current value of the sampled value of the at least one working state parameter and the previous value exceeds a preset range, writing the current value of the sampled value of the at least one working state parameter into the first storage unit 131; and when the difference between the current value of the sampled value of the at least one working state parameter and the previous Nth value exceeds the preset range, writing the current value of the sampled value of the at least one working state parameter into the second storage unit 132, where N is an integer greater than 1, for example, N=10.

[0060] In one embodiment, the abnormal event of the battery module 110 may be an overvoltage event or an overtemperature event; the first frequency and the second frequency may be 1 time / 10 seconds and 1 time / 1 second, respectively; the preset range of voltage may be (+ / -) 1V, and the preset range of temperature may be (+ / -) 0.1℃.

[0061] Additionally, the battery device 100 may further include a third storage unit for storing the time when the battery module 110 malfunctions and the current value of the sampled value of the at least one operating state parameter corresponding to that time.

[0062] Based on the above description, the present invention further proposes a battery state monitoring system. Figure 3 This is a block diagram of an embodiment of the battery state monitoring system of the present invention. Figure 3 As shown, a battery status monitoring system 200 includes a battery device 210 and an information processing device 220. The battery device 210 is implemented by the battery device 100, and the information processing device 220 is used to perform a battery operating history analysis on the data stored in the first storage unit 131 or the second storage unit 132.

[0063] In detail, the analysis of the battery's operating history includes:

[0064] (a) Determine the number of times the battery module 110 operates, its operating mode, operating duration, and operating temperature based on the data stored in the first storage unit 131 or the second storage unit 132; and.

[0065] (ii) Plot a curve based on the number of times the battery module operates, the operating mode, the duration of operation, and the operating temperature, and display it on a screen.

[0066] Please refer to the above as well. Figure 4a and Figure 4b ,in, Figure 4a for Figure 2 The voltage and temperature profiles of the battery module in the battery device; Figure 4b for Figure 2 The voltage and current curves of the battery module in the battery device. (From...) Figure 4a and Figure 4bIt can be seen that the charging current is approximately 15A, the discharging current is approximately 8A (i.e., -8A), and the operating temperature during charging and discharging is approximately between 25 and 28.5°C. That is, the information processing device 220 can define a working event based on the operating current of the battery module 110, which can be a charging event or a discharging event; and determine the remaining battery cycle life or cause of failure of the battery module 110 based on the number of working events and whether the working events are abnormal. For example, assuming the battery module 110 has 500 charging cycles, the information processing device 220 defines n working events (E1, E2, E3, ..., En) based on the data stored in the second storage unit 132, where n is an integer greater than 1, and determines from these working events that there are a total of 300 battery cycle uses; then, if there are no abnormalities in these working events, the remaining battery cycle life of the battery module 110 can be estimated to be 200 cycles; and if there are abnormal events in these working events, the remaining battery cycle life of the battery module 110 can be estimated to be less than 200 cycles. Additionally, if the battery module 110 has failed and an abnormal event is found in these operating events, the failure can be attributed to the abnormal event.

[0067] Based on the above design, the present invention has the following advantages:

[0068] 1. The battery device of the present invention can read the operating status parameters of the battery module at a lower sampling frequency when the battery module is not malfunctioning, and read the operating status parameters of the battery module at a higher sampling frequency when the battery module malfunctions, thereby saving power consumption and extracting the operating status history of the battery module when malfunctioning in detail.

[0069] 2. The battery device of the present invention can determine whether to store the current sampled value by judging whether there is a meaningful difference between the current sampled value and the previous sampled value of the operating state parameter, thereby effectively saving the storage space of the storage unit.

[0070] Third, the battery status monitoring system of the present invention can perform a battery operating history analysis on the operating status parameter data stored in the storage unit through an information processing device, so as to help engineers understand the operating history of the battery module and thus determine the remaining battery cycle life or the cause of failure of the battery module; and

[0071] Fourth, the battery status monitoring system of the present invention can use an information processing device to draw a curve of the working process of the battery module and display it on a screen to facilitate engineers to interpret the working process of the battery module.

[0072] The embodiments disclosed in this case are preferred embodiments. Any partial changes or modifications that originate from the technical concept of this case and are easily deduced by those skilled in the art fall within the protection scope of this case.

[0073] In conclusion, this case demonstrates that its purpose, means, and effects are different from existing technologies and are practical.

Claims

1. A battery device, comprising: One battery module; as well as A control unit, coupled to the battery module, is used to perform an operating state extraction operation, the operating state extraction operation including: Determine whether the battery module is malfunctioning based on at least one operating status parameter of the battery module. If not, perform a first extraction operation; if yes, perform a second extraction operation. The first extraction operation involves reading the sampled value of at least one operating state parameter of the battery module at a first frequency; the second extraction operation involves reading the sampled value of the at least one operating state parameter of the battery module at a second frequency, wherein the second frequency is higher than the first frequency.

2. The battery device according to claim 1, wherein the first extraction operation further comprises: The sampled value of at least one working state parameter is written into a first storage unit; as well as When the difference between the current value of the sampled value of at least one operating state parameter and the previous first value exceeds a preset range, the current value of the sampled value of the at least one operating state parameter is written into a second storage unit.

3. The battery device according to claim 2, wherein the second extraction operation further comprises: When the difference between the current value and the previous value of the sampled value of at least one working state parameter exceeds a preset range, the current value of the sampled value of the at least one working state parameter is written into the first storage unit.

4. The battery device according to claim 3, wherein the second extraction operation further comprises: When the difference between the current value of the sampled value of at least one working state parameter and the previous Nth value exceeds the preset range, the current value of the sampled value of the at least one working state parameter is written into the second storage unit, where N is an integer greater than 1.

5. The battery device according to claim 1, wherein, The battery module has a communication interface for communicating with the control unit, and the communication interface is a group of communication interfaces selected from USB interface, Bluetooth interface, WiFi interface, RS232 interface, RS485 interface and Type-C interface.

6. The battery device according to claim 1, wherein, The at least one operating state parameter includes at least one parameter selected from the group consisting of voltage, current, and temperature.

7. The battery device according to claim 4, further comprising a third storage unit for storing the time point at which the battery module malfunctions and the current value of the sampled value of the at least one operating state parameter corresponding to the time point.

8. A battery state monitoring system, comprising an information processing device and a battery device according to any one of claims 1 to 7, wherein, The information processing device is used to perform a battery operating history analysis on the data stored in the first storage unit or the second storage unit.

9. The battery state monitoring system according to claim 8, wherein, The battery operating history analysis includes determining the number of times the battery module operates, its operating mode, operating duration, and operating temperature based on the data stored in the first or second storage unit.

10. The battery state monitoring system according to claim 9, wherein, The battery operating history analysis further includes: plotting a curve based on the number of times the battery module operates, the operating mode, the duration of operation, and the operating temperature, and displaying it on a screen.

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