Rechargeable lithium ion battery and intelligent battery management system

Abstract

The invention belongs to the technical field of rechargeable batteries, and provides a rechargeable lithium ion battery and an intelligent battery management system.The rechargeable lithium ion battery comprises a shell, a battery cell, a battery charging PCB, a battery management PCB and an expansion connection PCB; the battery cell, the battery charging PCB, the battery management PCB and the expansion connection PCB are arranged in the shell; and the battery cell is respectively connected with the shell, the battery charging PCB, the battery management PCB and the expansion connection PCB. Through the design of the rechargeable lithium ion battery, the use safety of the rechargeable lithium ion battery can be improved, and the intelligent management level of the lithium ion battery is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply, and in particular to a rechargeable lithium-ion battery and an intelligent battery management system. Background Art

[0002] Rechargeable batteries are rechargeable batteries with a limited number of charging times, and can be used after being charged with a charger; lithium-ion batteries, as a type of rechargeable battery, mainly rely on the movement of lithium ions between the positive and negative electrodes to work. At present, rechargeable and recyclable lithium-ion batteries are increasingly widely used, mainly 1.5V lithium-ion batteries, which are mainly used to power small devices and instrumentation tools, such as smoke alarms, multimeters, microphones, toys, etc., and basically use steel-shell cylindrical cells; but the disadvantage of steel-shell cylindrical cells is that they are easy to explode in the event of a short circuit, making it difficult to ensure the safety and reliability of lithium-ion batteries when they are in low-temperature working conditions or when used on military aircraft model equipment; Polymer cells are another type of lithium-ion battery cell structure that uses a soft-pack design. They are not prone to explosion in the event of a short circuit, greatly improving product safety. However, since polymer cells use a soft-pack design, they lack an effective fixing platform in their structure, and are not mature enough in the management of lithium-ion batteries.

[0003] Therefore, it is necessary to provide a rechargeable lithium-ion battery and an intelligent battery management system. Summary of the invention

[0004] The present invention provides a rechargeable lithium-ion battery and an intelligent battery management system. By proposing a design of a rechargeable lithium-ion battery, the use safety of the rechargeable lithium-ion battery can be improved, and the intelligent management level of the lithium-ion battery can be improved.

[0005] The invention provides a rechargeable lithium-ion battery, comprising: a shell, a battery cell, a battery charging PCB board, a battery management PCB board and an extended connection PCB board; the battery cell, the battery charging PCB board, the battery management PCB board and the extended connection PCB board are all arranged in the shell; the battery cell is respectively connected to the shell, the battery charging PCB board, the battery management PCB board and the extended connection PCB board.

[0006] Furthermore, the shell is made of steel.

[0007] Furthermore, a TYPE-C female socket is arranged on the battery charging PCB board, and the TYPE-C female socket is inserted into the charging port arranged on the outer shell.

[0008] Furthermore, the battery cell is connected to the positive electrode provided on the battery charging PCB board and the battery management PCB board respectively through the configured positive electrode nickel strip; the battery cell is connected to the negative electrode provided on the battery charging PCB board and the battery management PCB board respectively through the configured negative electrode nickel strip; the battery cell is connected to the outer casing through the configured negative electrode nickel strip.

[0009] Furthermore, the outer shell is provided with positive electrode hardware, and the positive electrode hardware is connected to the output end of the battery charging PCB board.

[0010] Furthermore, the battery management PCB board is configured with a temperature sensor, a battery cell power detection component and a wireless communication component; the temperature sensor and the battery cell power detection component are respectively connected to the wireless communication component.

[0011] Furthermore, the extended connection PCB board is provided with a connection interface penetrating the outer shell, and the connection interface is used to connect with a plurality of rechargeable lithium-ion batteries of the same model or different models to form a battery pack.

[0012] An intelligent battery management system, applied to a rechargeable lithium-ion battery, comprises: A data acquisition module, used for collecting monitoring parameter data of a rechargeable lithium-ion battery or battery pack; A data analysis module is used to analyze the working status of the rechargeable lithium-ion battery or battery pack according to the monitoring parameter data to obtain analysis results; The management control module is used to manage and control the rechargeable lithium-ion battery or battery pack according to the analysis result.

[0013] Furthermore, monitoring parameter data of the rechargeable lithium-ion battery or battery pack is collected, including: Using temperature sensors to collect and obtain temperature data of rechargeable lithium-ion batteries or battery packs; Using the battery cell power detection component to detect and obtain charging power change data of a rechargeable lithium-ion battery or battery pack; Receiving and acquiring temperature data and charging power change data based on the wireless communication component; According to the monitoring parameter data, the working status of the rechargeable lithium-ion battery or battery pack is analyzed to obtain the analysis results, including: A processor is used to perform threshold analysis on the temperature data and the charging power change data. When the temperature data reaches a set temperature data threshold, a first analysis result is obtained; when the deviation value between the charging power change data and the set charging power change data at a set number of reference points is greater than a set deviation threshold, a second analysis result is obtained; the first analysis result and the second analysis result are summarized to obtain an analysis result.

[0014] Further, based on the analysis results, the rechargeable lithium-ion battery or battery pack is managed and controlled, including: According to the first analysis result and the second analysis result, and in accordance with the set charging control strategy, the charging of the rechargeable lithium-ion battery or the battery pack is temporarily controlled; Using a set battery health assessment model for a rechargeable lithium-ion battery or battery pack, based on historical temperature data and historical charging power change data, the battery health of the rechargeable lithium-ion battery or battery pack is assessed to obtain an assessment result; If the evaluation result is lower than the set evaluation expected value, the probability of charging failure of the rechargeable lithium-ion battery or battery pack is predicted based on the set fault probability prediction model to obtain the fault probability prediction value; if the probability prediction value is greater than the set probability threshold, the rechargeable lithium-ion battery is checked and replaced on the basis of suspended control; the checking and replacement includes: if it is a single rechargeable lithium-ion battery, an early warning signal for checking and replacement is issued; if it is a battery pack, the following steps are followed: Obtaining the type and connection structure of the rechargeable lithium-ion battery in the battery pack, performing fault simulation analysis on the type and connection structure of the rechargeable lithium-ion battery using a set fault simulation model, and locating, according to the fault simulation analysis results, several rechargeable lithium-ion batteries with a failure risk greater than a set risk threshold as candidate replacement targets; For candidate replacement targets, the battery health assessment model is used in combination with the fault probability prediction model to perform health assessment and fault probability prediction one by one to obtain several corresponding fault probability prediction values. The first candidate replacement target whose fault probability prediction value is greater than the set first fault probability prediction value is taken as the final replacement target for replacement.

[0015] Compared with the prior art, the present invention has the following advantages and beneficial effects: by proposing a design of a rechargeable lithium-ion battery, the use safety of the rechargeable lithium-ion battery can be improved, and the intelligent management level of the lithium-ion battery can be improved.

[0016] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0017] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1A schematic diagram of the structure of a rechargeable lithium-ion battery; Figure 2 This is a schematic diagram of the structure of an intelligent battery management system; Figure 3 Schematic diagram of the process of collecting monitoring parameter data for a rechargeable lithium-ion battery or battery pack. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0020] The present invention provides a rechargeable lithium-ion battery, such as Figure 1 As shown, it includes: a shell, a battery cell, a battery charging PCB board, a battery management PCB board and an extended connection PCB board; the battery cell, the battery charging PCB board, the battery management PCB board and the extended connection PCB board are all configured in the shell; the battery cell is respectively connected to the shell, the battery charging PCB board, the battery management PCB board and the extended connection PCB board.

[0021] The working principle of the above technical solution is: in order to realize the design of a rechargeable lithium-ion battery, the structure proposed by the present invention is: a shell, a battery cell, a battery charging PCB board, a battery management PCB board and an extended connection PCB board; wherein the battery cell, the battery charging PCB board, the battery management PCB board and the extended connection PCB board are all configured in the shell; the battery cell is respectively connected to the shell, the battery charging PCB board, the battery management PCB board and the extended connection PCB board.

[0022] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment and proposing a design of a rechargeable lithium-ion battery, the use safety of the rechargeable lithium-ion battery can be improved, and the intelligent management level of the lithium-ion battery can be improved.

[0023] In one embodiment, the shell is made of steel.

[0024] The working principle of the above technical solution is: by configuring the shell material to be steel material, it can be ensured that the shell effectively protects the rechargeable lithium-ion battery cell.

[0025] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the shell material is configured as steel material, which can ensure that the shell effectively protects the rechargeable lithium-ion battery cell.

[0026] In one embodiment, a TYPE-C female socket is configured on the battery charging PCB board, and the TYPE-C female socket is inserted into the charging port set on the outer shell.

[0027] The working principle of the above technical solution is: the battery charging PCB board is equipped with a TYPE-C female socket, which can be used to realize the charging function. The TYPE-C female socket is inserted into the charging port set on the outer shell to facilitate the charging of the lithium-ion battery.

[0028] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, the charging function of the lithium-ion battery can be realized by configuring the TYPE-C female socket.

[0029] In one embodiment, the battery cell is connected to the positive electrode provided on the battery charging PCB board and the battery management PCB board respectively through the configured positive electrode nickel strip; the battery cell is connected to the negative electrode provided on the battery charging PCB board and the battery management PCB board respectively through the configured negative electrode nickel strip; the battery cell is connected to the outer casing through the configured negative electrode nickel strip.

[0030] The working principle of the above technical solution is: in order to realize the connection structure between the battery cell and the shell, the battery charging PCB board and the battery management PCB board, the present invention proposes: the battery cell is connected to the positive electrode set on the battery charging PCB board and the battery management PCB board respectively through the configured positive electrode nickel strip; the battery cell is connected to the negative electrode set on the battery charging PCB board and the battery management PCB board respectively through the configured negative electrode nickel strip; the battery cell is connected to the shell through the configured negative electrode nickel strip.

[0031] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, by configuring the connection structure between the battery cell and the shell, the battery charging PCB board and the battery management PCB board, the normal operation of the battery cell can be guaranteed.

[0032] In one embodiment, the housing is provided with positive electrode hardware, which is connected to the output end of the battery charging PCB board.

[0033] The working principle of the above technical solution is: by configuring the positive electrode hardware on the shell, the output end of the battery charging PCB board is connected through the positive electrode hardware to achieve the normal structural connection of the lithium-ion battery.

[0034] The beneficial effect of the above technical solution is: by adopting the solution provided by this embodiment, by configuring the positive electrode hardware on the shell, the normal structural connection of the lithium-ion battery can be ensured.

[0035] In one embodiment, the battery management PCB board is configured with a temperature sensor, a battery cell power detection component and a wireless communication component; the temperature sensor and the battery cell power detection component are respectively connected to the wireless communication component.

[0036] The working principle of the above technical solution is: a temperature sensor, a battery cell power detection component and a wireless communication component are configured on the battery management PCB board, which can be used to collect the temperature data and power status data of the battery cell, and the collected temperature data and power status data can be transmitted through the wireless communication component; the temperature sensor and the battery cell power detection component are respectively connected to the wireless communication component.

[0037] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, by configuring the battery management PCB board, a basis is provided for the subsequent intelligent management of the battery management system.

[0038] In one embodiment, the extended connection PCB board is configured with a connection interface penetrating the housing, and the connection interface is used to connect with a plurality of rechargeable lithium-ion batteries of the same model or different models to form a battery pack.

[0039] The working principle of the above technical solution is: in order to realize the quick connection between a single lithium-ion battery and other lithium-ion batteries, the present invention sets an extended connection PCB board, and configures a connection interface penetrating the outer shell on the extended connection PCB board so as to connect with several rechargeable lithium-ion batteries of the same model or different models to form a battery pack.

[0040] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, by configuring an extended connection PCB board and setting a connection interface, it can ensure convenience for the composition of the battery pack.

[0041] Intelligent battery management system, such as Figure 2 As shown, it is applied to a rechargeable lithium-ion battery, comprising: A data acquisition module, used for collecting monitoring parameter data of a rechargeable lithium-ion battery or battery pack; A data analysis module is used to analyze the working status of the rechargeable lithium-ion battery or battery pack according to the monitoring parameter data to obtain analysis results; The management control module is used to manage and control the rechargeable lithium-ion battery or battery pack according to the analysis result.

[0042] The working principle of the above technical solution is as follows: in order to realize an intelligent battery management system, the present invention proposes a data acquisition module for collecting monitoring parameter data of a rechargeable lithium-ion battery or a battery pack; proposes a data analysis module for analyzing the working status of the rechargeable lithium-ion battery or the battery pack according to the monitoring parameter data to obtain analysis results; and proposes a management control module for managing and controlling the rechargeable lithium-ion battery or the battery pack according to the analysis results.

[0043] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, by utilizing the intelligent battery management system, efficient management of lithium-ion batteries can be achieved, which is beneficial to the management of the charging process of lithium-ion batteries.

[0044] In one embodiment, Figure 3 As shown, the monitoring parameter data of the rechargeable lithium-ion battery or battery pack is collected, including: Using temperature sensors to collect and obtain temperature data of rechargeable lithium-ion batteries or battery packs; Using the battery cell power detection component to detect and obtain charging power change data of a rechargeable lithium-ion battery or battery pack; Receiving and acquiring temperature data and charging power change data based on the wireless communication component; According to the monitoring parameter data, the working status of the rechargeable lithium-ion battery or battery pack is analyzed to obtain the analysis results, including: A processor is used to perform threshold analysis on the temperature data and the charging power change data. When the temperature data reaches a set temperature data threshold, a first analysis result is obtained; when the deviation value between the charging power change data and the set charging power change data at a set number of reference points is greater than a set deviation threshold, a second analysis result is obtained; the first analysis result and the second analysis result are summarized to obtain an analysis result.

[0045] The working principle of the above technical solution is: in order to realize the collection of monitoring parameter data of a rechargeable lithium-ion battery or a battery pack, the present invention first uses a temperature sensor to collect and obtain the temperature data of the rechargeable lithium-ion battery or the battery pack; then uses a cell power detection component to detect and obtain the charging power change data of the rechargeable lithium-ion battery or the battery pack; and then receives and obtains the temperature data and the charging power change data based on the wireless communication component; In order to analyze the working status of a rechargeable lithium-ion battery or battery pack and obtain an analysis result, the present invention first uses a processor to perform threshold analysis on temperature data and charging power change data. When the temperature data reaches a set temperature data threshold, a first analysis result is obtained; when the deviation value between the charging power change data and the set charging power change data at a set number of reference points is greater than a set deviation threshold, a second analysis result is obtained; and the first analysis result and the second analysis result are summarized to obtain an analysis result.

[0046] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, by collecting monitoring parameter data of rechargeable lithium-ion batteries or battery packs and analyzing the working status of rechargeable lithium-ion batteries or battery packs, accurate analysis results can be obtained, providing a basis for subsequent management and control.

[0047] In one embodiment, according to the analysis result, the rechargeable lithium-ion battery or battery pack is managed and controlled, including: According to the first analysis result and the second analysis result, and in accordance with the set charging control strategy, the charging of the rechargeable lithium-ion battery or the battery pack is temporarily controlled; Using a set battery health assessment model for a rechargeable lithium-ion battery or battery pack, based on historical temperature data and historical charging power change data, the battery health of the rechargeable lithium-ion battery or battery pack is assessed to obtain an assessment result; If the evaluation result is lower than the set evaluation expected value, the probability of charging failure of the rechargeable lithium-ion battery or battery pack is predicted based on the set fault probability prediction model to obtain the fault probability prediction value; if the probability prediction value is greater than the set probability threshold, the rechargeable lithium-ion battery is checked and replaced on the basis of suspended control; the checking and replacement includes: if it is a single rechargeable lithium-ion battery, an early warning signal for checking and replacement is issued; if it is a battery pack, the following steps are followed: Obtaining the type and connection structure of the rechargeable lithium-ion battery in the battery pack, performing fault simulation analysis on the type and connection structure of the rechargeable lithium-ion battery using a set fault simulation model, and locating, according to the fault simulation analysis results, several rechargeable lithium-ion batteries with a failure risk greater than a set risk threshold as candidate replacement targets; For candidate replacement targets, the battery health assessment model is used in combination with the fault probability prediction model to perform health assessment and fault probability prediction one by one to obtain several corresponding fault probability prediction values. The first candidate replacement target whose fault probability prediction value is greater than the set first fault probability prediction value is taken as the final replacement target for replacement.

[0048] The working principle of the above technical solution is: in order to manage and control the rechargeable lithium-ion battery or battery pack, the present invention first performs a charging operation for the rechargeable lithium-ion battery or battery pack according to the set charging control strategy based on the first analysis result and the second analysis result, and performs a temporary control; then, the battery health evaluation model of the set rechargeable lithium-ion battery or battery pack is used to evaluate the battery health of the rechargeable lithium-ion battery or battery pack based on the historical temperature data and the historical charging power change data to obtain the evaluation result; and then, a probability prediction is performed based on the evaluation result. If the evaluation result is lower than the set evaluation expectation value, the probability of charging failure of the rechargeable lithium-ion battery or battery pack is predicted based on the set fault probability prediction model to obtain a fault probability prediction value; if the probability prediction value is greater than the set probability threshold, the rechargeable lithium-ion battery is checked and replaced on the basis of suspended control; the checking and replacement includes: if it is a single rechargeable lithium-ion battery, a warning signal for checking and replacement is issued; if it is a battery pack, the following steps are followed: first, the type and connection structure of the rechargeable lithium-ion battery in the battery pack are obtained, and the type and connection structure of the rechargeable lithium-ion battery are subjected to fault simulation analysis using the set fault simulation model. According to the fault simulation analysis results, several rechargeable lithium-ion batteries with a failure risk greater than the set risk threshold are located as candidate replacement targets; then, for the candidate replacement targets, the battery health evaluation model is used in combination with the fault probability prediction model to perform health evaluation and fault probability prediction one by one to obtain several corresponding fault probability prediction values, and the first candidate replacement target with a fault probability prediction value greater than the set first fault probability prediction value is replaced as the final replacement target.

[0049] The beneficial effect of the above technical solution is: by adopting the solution provided in this embodiment, by managing and controlling the rechargeable lithium-ion battery or battery pack, it is possible to ensure that the intelligent management level of the rechargeable lithium-ion battery or battery pack is improved.

[0050] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A rechargeable lithium-ion battery, characterized in that: include: The outer shell, the battery cell, the battery charging PCB board, the battery management PCB board and the extended connection PCB board; the battery cell, the battery charging PCB board, the battery management PCB board and the extended connection PCB board are all arranged in the outer shell; the battery cell is respectively connected to the outer shell, the battery charging PCB board, the battery management PCB board and the extended connection PCB board.

2. A rechargeable lithium-ion battery according to claim 1, characterized in that: The housing is made of steel.

3. A rechargeable lithium-ion battery according to claim 1, characterized in that: The battery charging PCB board is equipped with a TYPE-C female socket, and the TYPE-C female socket is inserted into the charging port set on the outer shell.

4. A rechargeable lithium-ion battery according to claim 1, characterized in that: The battery cell is connected to the positive electrode set on the battery charging PCB board and the battery management PCB board respectively through the configured positive electrode nickel strip; the battery cell is connected to the negative electrode set on the battery charging PCB board and the battery management PCB board respectively through the configured negative electrode nickel strip; the battery cell is connected to the outer shell through the configured negative electrode nickel strip.

5. A rechargeable lithium-ion battery according to claim 1, characterized in that: The outer shell is provided with positive hardware, which is connected to the output end of the battery charging PCB board.

6. A rechargeable lithium-ion battery according to claim 1, characterized in that: The battery management PCB board is configured with a temperature sensor, a battery cell power detection component and a wireless communication component; the temperature sensor and the battery cell power detection component are respectively connected to the wireless communication component.

7. A rechargeable lithium-ion battery according to claim 1, characterized in that: The extended connection PCB board is provided with a connection interface penetrating the outer shell, and the connection interface is used to connect with a plurality of rechargeable lithium-ion batteries of the same model or different models to form a battery pack.

8. Intelligent battery management system, characterized in that, A rechargeable lithium-ion battery as claimed in any one of claims 1 to 7, comprising: A data acquisition module, used for collecting monitoring parameter data of a rechargeable lithium-ion battery or battery pack; A data analysis module is used to analyze the working status of the rechargeable lithium-ion battery or battery pack according to the monitoring parameter data to obtain analysis results; The management control module is used to manage and control the rechargeable lithium-ion battery or battery pack according to the analysis result.

9. The intelligent battery management system according to claim 8, characterized in that: Collect monitoring parameter data of rechargeable lithium-ion batteries or battery packs, including: Using temperature sensors to collect and obtain temperature data of rechargeable lithium-ion batteries or battery packs; Using the battery cell power detection component to detect and obtain charging power change data of a rechargeable lithium-ion battery or battery pack; Receiving and acquiring temperature data and charging power change data based on the wireless communication component; According to the monitoring parameter data, the working status of the rechargeable lithium-ion battery or battery pack is analyzed to obtain the analysis results, including: A processor is used to perform threshold analysis on the temperature data and the charging power change data. When the temperature data reaches a set temperature data threshold, a first analysis result is obtained; when the deviation value between the charging power change data and the set charging power change data at a set number of reference points is greater than a set deviation threshold, a second analysis result is obtained; the first analysis result and the second analysis result are summarized to obtain an analysis result.

10. The intelligent battery management system according to claim 9, characterized in that: Based on the analysis results, management and control of rechargeable lithium-ion batteries or battery packs are carried out, including: According to the first analysis result and the second analysis result, and in accordance with the set charging control strategy, the charging of the rechargeable lithium-ion battery or the battery pack is temporarily controlled; Using a set battery health assessment model for a rechargeable lithium-ion battery or battery pack, based on historical temperature data and historical charging power change data, the battery health of the rechargeable lithium-ion battery or battery pack is assessed to obtain an assessment result; If the evaluation result is lower than the set evaluation expected value, the probability of charging failure of the rechargeable lithium-ion battery or battery pack is predicted based on the set fault probability prediction model to obtain the fault probability prediction value; if the probability prediction value is greater than the set probability threshold, the rechargeable lithium-ion battery is checked and replaced on the basis of suspended control; the checking and replacement includes: if it is a single rechargeable lithium-ion battery, an early warning signal for checking and replacement is issued; if it is a battery pack, the following steps are followed: Obtaining the type and connection structure of the rechargeable lithium-ion battery in the battery pack, performing fault simulation analysis on the type and connection structure of the rechargeable lithium-ion battery using a set fault simulation model, and locating, according to the fault simulation analysis results, several rechargeable lithium-ion batteries with a failure risk greater than a set risk threshold as candidate replacement targets; For candidate replacement targets, the battery health assessment model is used in combination with the fault probability prediction model to perform health assessment and fault probability prediction one by one to obtain several corresponding fault probability prediction values. The first candidate replacement target whose fault probability prediction value is greater than the set first fault probability prediction value is taken as the final replacement target for replacement.

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