Monitoring system for detecting SOC and SOH states of lead-acid storage battery

Abstract

The invention discloses a monitoring system for detecting SOC and SOH states of a lead-acid storage battery, and relates to the technical field of storage battery management. The system comprises a data acquisition unit, a data transmission unit and a control mainboard. Each data acquisition unit is used for acquiring current, voltage and temperature data of a single battery and further comprises a timing module, a switch module, a microprocessor, a button battery and an indicator lamp; the data acquisition unit performs information interaction with the control mainboard through the data transmission unit and the storage module; and the control mainboard records the received data information and calculates the SOC estimated value and the SOH estimated value of the battery according to the received data and historical data. Through the action of the data acquisition unit, the data transmission unit and the control mainboard, the battery is detected at regular time and sent in time; and data transmission in batches is carried out. The advantages of improving management convenience, transmission smoothness and detection efficiency are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of battery management, and in particular relates to a monitoring system for detecting the SOC and SOH states of a lead-acid battery. Background Art

[0002] Battery SOC is used to reflect the remaining capacity of the battery. Its numerical value is defined as the ratio of the remaining capacity to the battery capacity, usually expressed as a percentage. Battery SOH refers to the health of the battery, that is, the measure of the remaining degree of the battery's service life. Among them, the battery SOC cannot be measured directly, and its size can only be estimated through parameters such as battery terminal voltage, charge and discharge current, and internal resistance. These parameters will also be affected by various uncertain factors such as battery aging, ambient temperature changes, and vehicle driving conditions; the main SOC estimation methods are internal resistance method, linear model method, and Kalman filter method; the principles of measuring battery SOH mainly include internal resistance measurement method, capacity measurement method, and open circuit voltage measurement method. Since the battery's SOH health status reflects the degree of attenuation of the battery's current capacity, accurate estimation of SOH helps the safe use and maintenance of the battery; the detection parameters and calculation of the battery's SOH and SOC values ​​can achieve the functions of timely detection of faulty batteries, elimination of hidden dangers, and improved user experience for battery management.

[0003] Currently, battery management has problems such as a large number of batteries and low efficiency in detecting and operating individual batteries, making it difficult to centrally manage a large number of batteries and failing to detect faulty batteries in a timely manner.

[0004] In view of the above-mentioned problems of difficulty in timely detection of a large number of batteries and failure to timely discover faulty batteries, the present invention designs a monitoring system for detecting the SOC and SOH states of lead-acid batteries. Summary of the invention

[0005] The purpose of the present invention is to provide a monitoring system for detecting the SOC and SOH status of a lead-acid battery. Through the functions of a data acquisition unit, a data transmission unit and a control mainboard, a single lead-acid battery is periodically detected and the data information is sent in a timely manner; all managed lead-acid batteries are data transmitted in batches; the advantages of improved management convenience, smooth data transmission and detection efficiency are achieved, and the above-mentioned problems are solved.

[0006] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0007] The present invention is a monitoring system for detecting the SOC and SOH states of a lead-acid battery, comprising a data acquisition unit, a data transmission unit and a control mainboard; the data acquisition unit comprises a current acquisition module, a voltage acquisition module and a temperature acquisition module; each of the data acquisition units acquires data on the current, voltage and temperature of a single lead-acid battery, and each of the data acquisition units further comprises a timing module, a switch module, a microprocessor, a button battery and an indicator light; the button battery supplies power to the timing module, the switch module, the microprocessor and the indicator light, the microprocessor receives time data information from the timing module, and the microprocessor controls the switch module and the indicator light; the switch module is used to control the on and off states of the data acquisition unit and the data transmission unit; a plurality of the data acquisition units exchange information with a control mainboard through the data transmission unit and the storage module; the data acquisition unit on each lead-acid battery transmits the acquired data information to the control mainboard, and the The control mainboard records the received data information and obtains the SOC estimation value and SOH estimation value of the lead-acid battery according to the received data and historical data through the embedded ampere-hour integration method or the extended Kalman filtering algorithm; the control mainboard is electrically connected to a display, and the display presents the SOC estimation value and the SOH estimation value; wherein, the control mainboard exchanges information with the microprocessors on several lead-acid batteries through the data transmission unit and the storage module; so that all lead-acid batteries will be subjected to periodic detection and data transmission in batches; in order to avoid the problems of large transmission data peak and large delay caused by the simultaneous data transmission of the detection data of a large number of lead-acid batteries, the smoothness of data transmission is improved; all data information is also transmitted in batches; the data acquisition unit performs periodic detection on individual lead-acid batteries and sends the data information in a timely manner; the management convenience and detection efficiency are greatly improved.

[0008] As a preferred technical solution of the present invention, a current-limiting resistor is connected in series in the voltage acquisition module; the current-limiting resistor is used to prevent the circuit from being damaged by a large current.

[0009] As a preferred technical solution of the present invention, the temperature acquisition module includes a battery temperature sensor and an ambient temperature sensor; the battery temperature sensor is used to detect the temperature of the lead-acid battery, and the ambient temperature sensor is used to detect the ambient temperature of the location where the lead-acid battery is located.

[0010] As a preferred technical solution of the present invention, the data transmission unit adopts a wireless transmission module or a Bluetooth transmission module; the data transmission method is selected according to factors such as the length of the shelf where the lead-acid battery is located and the size of the warehouse space.

[0011] As a preferred technical solution of the present invention, the microprocessor performs timed start and stop operations on the switch module through the time data information of the timing module.

[0012] As a preferred technical solution of the present invention, the indicator light adopts a miniature three-color indicator light; the display states of the three-color indicator light are off, red, yellow, and green respectively; when the three-color indicator light is off, it indicates that the button battery fails to supply power to the timing module, the switch module, the microprocessor and the indicator light, resulting in a circuit failure; when the three-color indicator light is red, it indicates that the temperature data information detected by the battery temperature sensor exceeds the design temperature range; when the three-color indicator light is yellow, it indicates that the microprocessor-controlled switch module is in a closed state at this time; when the three-color indicator light is green, it indicates that the data acquisition unit is collecting battery parameters and transmitting collected data.

[0013] As a preferred technical solution of the present invention, the control main board is electrically connected to an alarm; when the temperature data information detected by the battery temperature sensor exceeds the design temperature range or the control main board fails to exchange information with the microprocessor, the control main board controls the alarm to start.

[0014] The present invention has the following beneficial effects:

[0015] 1. The present invention performs periodic detection on a single lead-acid battery and sends the data information in a timely manner through the functions of a data acquisition unit, a data transmission unit and a control mainboard; transmits data of all managed lead-acid batteries in batches; and achieves the advantages of improved management convenience, smooth data transmission and detection efficiency.

[0016] 2. The present invention uses the functions of the timing module, switch module, microprocessor, button battery and indicator light to display temperature abnormality, circuit abnormality, microprocessor-controlled data acquisition unit and data transmission unit in the off state, data acquisition unit in the process of detection and transmission, etc. according to the different states of the indicator light, which is conducive to timely understanding of the operating status and early warning.

[0017] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0019] Figure 1 The present invention is a system block diagram of a monitoring system for detecting the SOC and SOH states of a lead-acid battery. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1 As shown, the present invention is a monitoring system for detecting the SOC and SOH states of a lead-acid battery, comprising a data acquisition unit, a data transmission unit and a control mainboard; the data acquisition unit comprises a current acquisition module, a voltage acquisition module and a temperature acquisition module; each data acquisition unit performs current, voltage and temperature data acquisition on a single lead-acid battery, and each data acquisition unit further comprises a timing module, a switch module, a microprocessor, a button battery and an indicator light; the button battery supplies power to the timing module, the switch module, the microprocessor and the indicator light, the microprocessor receives time data information from the timing module, and the microprocessor controls the switch module and the indicator light; the switch module is used to control the on and off states of the data acquisition unit and the data transmission unit; a plurality of data acquisition units exchange information with a control mainboard through the data transmission unit and the storage module; the data acquisition unit on each lead-acid battery transmits the collected data information to the control mainboard, and the control mainboard records the received data information and performs data acquisition based on the received data and historical data by embedding The SOC estimation value and SOH estimation value of the lead-acid battery are obtained by using the ampere-hour integration method or the extended Kalman filtering algorithm; the control mainboard is electrically connected to a display, and the display presents the SOC estimation value and the SOH estimation value; wherein, the control mainboard exchanges information with the microprocessors on several lead-acid batteries through the data transmission unit and the storage module; so that all lead-acid batteries will be periodically tested and transmitted in batches; in order to avoid the problems of large transmission data peak and large delay caused by the simultaneous data transmission of the detection data of a large number of lead-acid batteries, the smoothness of data transmission is improved; all data information is also transmitted in batches; the data acquisition unit performs periodic detection on a single lead-acid battery and sends the data information in time; the management convenience and detection efficiency are greatly improved; the periodicity can be set according to the management needs, and the detection period of the data acquisition unit can be set to 3min, 10min, 1h, 6h, 24h, 48h, etc.

[0022] Among them Figure 1As shown, a current-limiting resistor is connected in series in the voltage acquisition module; the current-limiting resistor is used to prevent the circuit from being damaged by a large current; the temperature acquisition module includes a battery temperature sensor and an ambient temperature sensor; the battery temperature sensor is used to detect the temperature of the lead-acid battery, and the ambient temperature sensor is used to detect the ambient temperature of the location where the lead-acid battery is located; the data transmission unit adopts a wireless transmission module or a Bluetooth transmission module; the data transmission method is selected according to factors such as the length of the shelf where the lead-acid battery is located and the size of the warehouse space; the microprocessor performs timed start and stop operations on the switch module through the time data information of the timing module.

[0023] Among them Figure 1 As shown, the indicator light adopts a miniature three-color indicator light; the display states of the three-color indicator light are off, red, yellow, and green respectively; when the three-color indicator light is off, it means that the button battery fails to supply power to the timing module, the switch module, the microprocessor and the indicator light, resulting in a circuit failure; when the three-color indicator light is red, it means that the temperature data information detected by the battery temperature sensor exceeds the design temperature range; when the three-color indicator light is yellow, it means that the microprocessor control switch module is in the off state at this time; when the three-color indicator light is green, it means that the data acquisition unit is collecting battery parameters and transmitting the collected data.

[0024] Among them Figure 1 As shown, the control mainboard is electrically connected to an alarm; when the temperature data information detected by the battery temperature sensor exceeds the design temperature range or the control mainboard fails to exchange information with the microprocessor, the control mainboard controls the alarm to start.

[0025] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0026] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A monitoring system for detecting the SOC and SOH status of a lead-acid battery, characterized in that: It includes a data acquisition unit, a data transmission unit and a control mainboard; The data acquisition unit includes a current acquisition module, a voltage acquisition module and a temperature acquisition module; each of the data acquisition units collects data on current, voltage and temperature of a single lead-acid battery, and each of the data acquisition units also includes a timing module, a switch module, a microprocessor, a button battery and an indicator light; the button battery supplies power to the timing module, the switch module, the microprocessor and the indicator light, the microprocessor receives time data information from the timing module, and the microprocessor controls the switch module and the indicator light; the switch module is used to control the opening and closing states of the data acquisition unit and the data transmission unit; A plurality of the data acquisition units exchange information with a control mainboard via a data transmission unit and a storage module; The data acquisition unit on each lead-acid battery transmits the collected data information to the control main board, and the control main board records the received data information and obtains the SOC estimation value and SOH estimation value of the lead-acid battery based on the received data and historical data through the embedded ampere-hour integration method or the extended Kalman filtering algorithm; the control main board is electrically connected to a display, and the display presents the SOC estimation value and the SOH estimation value.

2. A monitoring system for detecting the SOC and SOH status of a lead-acid battery according to claim 1, characterized in that: The voltage acquisition module is connected in series with a current-limiting resistor.

3. A monitoring system for detecting the SOC and SOH status of a lead-acid battery according to claim 1, characterized in that: The temperature acquisition module includes a battery temperature sensor and an ambient temperature sensor.

4. A monitoring system for detecting the SOC and SOH status of a lead-acid battery according to claim 1, characterized in that: The data transmission unit adopts a wireless transmission module or a Bluetooth transmission module.

5. A monitoring system for detecting the SOC and SOH status of a lead-acid battery according to claim 1, characterized in that: The microprocessor performs timed start and stop operations on the switch module through the time data information of the timing module.

6. A monitoring system for detecting the SOC and SOH status of a lead-acid battery according to claim 1, characterized in that: The indicator light adopts a miniature three-color indicator light.

7. A monitoring system for detecting the SOC and SOH status of a lead-acid battery according to claim 1, characterized in that: The control mainboard is electrically connected with an alarm.

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