CN115498729A - Battery pack and charging method thereof - Google Patents
Battery pack and charging method thereof Download PDFInfo
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- CN115498729A CN115498729A CN202211162077.XA CN202211162077A CN115498729A CN 115498729 A CN115498729 A CN 115498729A CN 202211162077 A CN202211162077 A CN 202211162077A CN 115498729 A CN115498729 A CN 115498729A
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- battery pack
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- charger
- mcu
- bms
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- 238000007600 charging Methods 0.000 title claims abstract description 106
- 238000000034 method Methods 0.000 title claims abstract description 28
- 230000008569 process Effects 0.000 claims description 10
- 230000002159 abnormal effect Effects 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 5
- 238000010280 constant potential charging Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 238000007405 data analysis Methods 0.000 claims description 2
- 230000010354 integration Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
- H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/00032—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by data exchange
- H02J7/00036—Charger exchanging data with battery
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/00714—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery charging or discharging current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
Abstract
The application provides a battery pack and a charging method thereof. The battery pack comprises a charger, an MCU, a BMS and a battery pack, wherein the battery pack, the BMS and the charger are integrated into an integrated structure, and the charger is electrically connected with the battery pack and used for transmitting the voltage of an external power supply to the battery pack for charging; the charger, the BMS and the MCU form a multiplexing structure. The invention realizes the integration of the battery, the BMS and the charger, and the charger can autonomously manage the charging strategy aiming at the battery pack and control the charging current.
Description
Technical Field
The application relates to the technical field of batteries, in particular to a battery pack and a charging method thereof.
Background
Under the double pressure of energy crisis and environmental pollution problem, safety, environmental protection and energy conservation have become the subjects of current automobile development, and electric automobiles are highly valued and supported by traffic and energy departments due to the advantages of energy conservation, environmental protection and no pollution. The battery is the core of the electric automobile, and the battery used by the current consumer generally uses a hardware protection board, only carries out simple protection and does not have BMS management; meanwhile, the charger is used as a safety guarantee, and only 0.1-0.2C low-current charging capacity is provided; the charger is external and charges the package outside, and is bulky, and the structure is comparatively complicated. Charging efficiency is low, and user experience is poor. In addition, the conventional BMS has strict matching requirements on batteries, electric cabinets, communication protocols and the like, and cannot meet the wide application requirements of C-end users.
In view of the above problems, those skilled in the art have sought solutions.
Disclosure of Invention
The present application is directed to solve the above-mentioned technical problem, and provide a battery pack and a charging method thereof, which achieve volume miniaturization of a high-power charger, and the charger is embedded in the battery pack, and a charging control IC multiplexes a main control IC of a BMS, and optimizes a communication protocol between devices into an internal algorithm and strategy of an integrated system.
In order to achieve the above purpose, the present application is implemented by the following technical solutions:
a battery pack comprises a charger, an MCU, a BMS and a battery pack, wherein the battery pack, the BMS and the charger are integrated into an integrated structure, and the charger is electrically connected with the battery pack and used for transmitting the voltage of an external power supply to the battery pack for charging; the charger, the BMS and the MCU form a multiplexing structure.
Optionally, the multiplexing structure includes: the battery pack charging system comprises a charging control circuit formed by connecting the MCU and the charger and used for controlling the charger to dynamically charge the battery pack, and a charging protection circuit formed by connecting the MCU and the BMS and used for interrupting dynamic charging according to the abnormal state of the battery pack.
Optionally, the multiplexing structure further includes: a charging control module of the charger and a main control module of the BMS are integrated in the MCU to form a comprehensive control module; the multiplexing structure also comprises that the charging control module and the main control module work independently and communicate through a communication line.
Optionally, the battery pack status information includes at least one of a battery S0C value, temperatures of positive and negative electrodes of a single battery, a voltage range of the single battery, a total voltage of the battery pack, and a total current of the battery pack.
Optionally, the model of the MCU includes STM32F103 or a domestic brand replacement model thereof.
The invention also provides a charging pile comprising the battery pack according to any one of claims 1 to 5.
The present invention also provides a charging method applied to the battery pack according to any one of claims 1 to 5, comprising the steps of:
s1, connecting the charger with an external power supply;
s2: controlling a charger to dynamically charge the battery pack through the MCU;
s3, in the dynamic charging process, performing data analysis on the battery pack state information fed back by the BMS through the MCU, and judging the charging state of the battery pack;
s4: and the MCU executes corresponding processing according to the judgment result of the charging state of the battery pack.
Optionally, the step S2 includes: firstly, charging the battery pack by adopting a preset constant voltage charging mode; when the voltage of the battery pack reaches a preset first charging voltage threshold value, charging the battery pack by adopting a preset low-current charging mode; and stopping charging when the voltage of the battery pack reaches a preset second charging voltage threshold value.
Optionally, the step S4 includes controlling the charger to keep the output charging current unchanged when the maximum allowable charging current of the battery pack is greater than a preset charging current of the external power supply.
Optionally, the step S4 further includes controlling the charger to be disconnected and stopping charging the battery pack when the state information of the battery pack is abnormal.
The invention provides a battery pack and a charging method, and aims to solve the problems of quick charging and safety of a user battery.
In order to make the aforementioned and other objects, features and advantages of the present application comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
The present application is described in detail below with reference to the attached drawings and detailed description;
fig. 1 is a functional block diagram of a battery pack according to an embodiment of the present application;
fig. 2 is a flowchart of a charging method according to an embodiment of the present application.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Fig. 1 is a functional block diagram of a battery pack according to an embodiment of the present invention, and referring to fig. 1, a battery pack 110 according to the present embodiment includes a charger 111, a single chip Microcomputer (MCU) 112, a Battery Management System (BMS) 113, and a battery pack 114, where the battery pack 114, the BMS113, and the charger 111 are integrated into an integrated structure, where the integrated structure is that the battery pack 114, the BMS113, and the charger 111 are electrically connected to form an integrated structure, and is also an integrated structure in appearance. Charger 111 is electrically connected to battery pack 114, and charger 111, BMS113, and MCU112 form a multiplexing structure.
The charger 111 is provided with a power interface capable of directly supplying power to the BMS113, the MCU112, and the battery pack 114, and an external power is used to directly supply power to the battery pack 110 after being connected to the power interface of the charger 111.
Specifically, the multiplexing structure may include: a charge control circuit formed by the MCU112 connected to the charger 111 for controlling the charger 111 to dynamically charge the battery pack 114, and a charge protection circuit formed by the MCU112 connected to the BMS113 for interrupting the dynamic charging according to an abnormal state of the battery pack 110. The multiplexing structure may further include: a charging control module of the charger 111 and a main control module of the BMS113 are integrated into the MCU112 to form an integrated control module. The integrated control module in the MCU112 can control the external power supply to dynamically charge the battery pack 114, which is a function of the charging control module in the conventional charger, and meanwhile, the integrated control module can process and execute the abnormal state in the charging process, which is a function of the main control module of the conventional BMS, and now the functions of the conventional charging control module and the main control module are integrated in the MCU112 to realize the function multiplexing of the two. Of course, multiplexing includes that the charging control module and the master control module can work independently and communicate through a communication line.
In this embodiment, the status information of the battery pack 110 includes at least one of a remaining battery capacity (S0C) value, anode and cathode temperatures of the battery cells, a voltage range of the battery cells, a total voltage of the battery pack, and a total current of the battery pack.
During the charging process of the battery pack 110, the MCU112 may control the charging current of the charger 111 to the battery pack 110 according to the above status information of the battery pack 110. For example, taking the SOC value of the battery as an example, when the value of S0C of the battery is lower than a preset SOC threshold, the charger 111 is controlled to charge with the maximum charging current, and when the value of S0C is higher than the SOC threshold, the charging current of the battery is reduced, and if the maximum temperature of the battery cell or the maximum voltage of the battery cell exceeds a safety value allowed by the battery during the charging process, the MCU112 controls the charger 111 to stop charging the battery pack 110, thereby protecting the battery.
In one embodiment, the model of the MCU112 includes STM32F103 or its national brand replacement model such as national technology, outlook; any model of MCU112 other than the ones described above can implement this function.
In an embodiment, the present invention further provides a charging pile, including the battery pack 110 according to the foregoing embodiment.
In one embodiment, the battery pack comprises a plurality of single batteries, and the battery pack is used for supplying electric energy for the electric automobile.
Fig. 2 is a flowchart of a charging method according to an embodiment of the present application. The charging method may be applied to the battery pack 110 according to the above embodiment, and includes the following steps:
s1, connecting a charger 111 with an external power supply;
s2: the MCU112 controls the charger 111 to dynamically charge the battery pack 114;
s3, in the dynamic charging process, the MCU112 analyzes the data of the battery pack state information fed back by the BMS113 and judges the charging state of the battery pack;
s4: the MCU112 executes corresponding processing according to the determination result of the charging state of the battery pack.
In this embodiment, step S2 may specifically include: firstly, charging the battery pack 114 by adopting a preset constant voltage charging mode; when the voltage of the battery pack 114 reaches a preset first charging voltage threshold, charging the battery pack 114 by adopting a preset low-current charging mode; when the voltage of battery pack 114 reaches a preset second charging voltage threshold, charging is stopped.
The step S4 may specifically include controlling the charger 111 to keep the output charging current unchanged when the maximum allowable charging current of the battery pack 114 is greater than the preset charging current of the external power supply.
The step S4 may further include controlling the charger 111 to be disconnected and stop charging the battery pack 110 when the status information of the battery pack 110 is abnormal.
When an external power supply is inserted into the charger 111, the external power supply outputs a charging current to charge the battery pack 110, at the moment, the external power supply charges the battery pack 110 by using a preset charging current, the BMS113 collects state information of the battery pack 110 and transmits the state information to the MCU112, the MCU112 calculates a maximum allowable charging current of the battery pack 110 according to the state information of the battery pack 110 and transmits the state information of the battery pack 110 and the maximum allowable charging current of the battery pack 110 to the comprehensive control template on the MCU112, the comprehensive control template detects the charging current output by the external power supply, and when the maximum allowable charging current is greater than the preset charging current, the comprehensive control template on the MCU112 controls the external power supply to keep the output charging current unchanged; when the maximum allowable charging current is smaller than the preset charging current, the comprehensive control template on the MCU112 controls the charging current output by the external power supply to change to the maximum allowable charging current; when the state information of the battery pack 110 collected by the BMS113 is abnormal, that is, the charging fails, the comprehensive control template on the MCU112 sets the maximum allowable charging current to zero, the comprehensive control template on the MCU112 controls the charger 111 to be disconnected, and the external power supply stops charging the battery pack 110.
The invention provides a battery pack and a charging method thereof, aiming at solving the problems of quick charging and safety of a user battery.
It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well. The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the recitation of a claim "comprising a" 8230a "\8230means" does not exclude the presence of additional identical elements in the process, method, article or apparatus in which the element is incorporated, and further, similarly named components, features, elements in different embodiments of the application may have the same meaning or may have different meanings, the specific meaning of which should be determined by its interpretation in the specific embodiment or by further combination with the context of the specific embodiment.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.
Claims (10)
1. A battery pack is characterized by comprising a charger, an MCU (microprogrammed control unit), a BMS (battery management system) and a battery pack, wherein the battery pack, the BMS and the charger are integrated into a whole structure, and the charger is electrically connected with the battery pack and used for transmitting the voltage of an external power supply to the battery pack for charging; the charger, the BMS and the MCU form a multiplexing structure.
2. The battery pack of claim 1, wherein the multiplexing structure comprises: the battery pack charging system comprises a charging control circuit formed by connecting the MCU and the charger and used for controlling the charger to dynamically charge the battery pack, and a charging protection circuit formed by connecting the MCU and the BMS and used for interrupting dynamic charging according to the abnormal state of the battery pack.
3. The battery pack of claim 1, wherein the multiplexing structure further comprises: a charging control module of the charger and a main control module of the BMS are integrated in the MCU to form a comprehensive control module; the multiplexing structure also comprises that the charging control module and the main control module work independently and communicate through a communication line.
4. The battery pack of claim 4, wherein the battery pack status information comprises at least one of a battery S0C value, a cell anode and cathode temperature, a cell voltage range, a total voltage of the battery pack, and a total current of the battery pack.
5. The battery pack of claim 1, wherein the model number of the MCU comprises STM32F103 or a domestic brand replacement model thereof.
6. A charging post comprising the battery pack of any one of claims 1-5.
7. A charging method applied to the battery pack according to any one of claims 1 to 5, comprising the steps of:
s1, connecting the charger with an external power supply;
s2: controlling a charger to dynamically charge the battery pack through the MCU;
s3, in the dynamic charging process, performing data analysis on the battery pack state information fed back by the BMS through the MCU, and judging the charging state of the battery pack;
s4: and the MCU executes corresponding processing according to the judgment result of the charging state of the battery pack.
8. The charging method according to claim 7, wherein the step S2 includes: firstly, charging the battery pack by adopting a preset constant voltage charging mode; when the voltage of the battery pack reaches a preset first charging voltage threshold value, charging the battery pack by adopting a preset low-current charging mode; and stopping charging when the voltage of the battery pack reaches a preset second charging voltage threshold value.
9. The charging method according to claim 7, wherein the step S4 comprises controlling the charger to keep the output charging current constant when the maximum allowable charging current of the battery pack is larger than a preset charging current of the external power supply.
10. The charging method according to claim 7, wherein the step S4 further comprises controlling the charger to be disconnected and stopping charging the battery pack when the state information of the battery pack is abnormal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211162077.XA CN115498729A (en) | 2022-09-23 | 2022-09-23 | Battery pack and charging method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211162077.XA CN115498729A (en) | 2022-09-23 | 2022-09-23 | Battery pack and charging method thereof |
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| CN115498729A true CN115498729A (en) | 2022-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211162077.XA Pending CN115498729A (en) | 2022-09-23 | 2022-09-23 | Battery pack and charging method thereof |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102136613A (en) * | 2011-02-18 | 2011-07-27 | 江苏技术师范学院 | Valve-regulated lead-acid battery equalizing charge method |
| CN102545288A (en) * | 2010-12-28 | 2012-07-04 | 天宇通讯科技(昆山)有限公司 | Charging integrated system module for electric vehicle battery |
| CN103138021A (en) * | 2013-03-07 | 2013-06-05 | 清华大学 | Battery charging method |
| CN103390917A (en) * | 2013-07-14 | 2013-11-13 | 鸥瑞智诺能源科技(北京)有限公司 | Built-in charging management type battery pack |
| CN108417917A (en) * | 2018-01-10 | 2018-08-17 | 中山大学 | A kind of lithium ion battery fast charge method |
| CN213027500U (en) * | 2020-09-11 | 2021-04-20 | 深圳天邦达科技有限公司 | Integrated device of DCDC converter and battery package |
-
2022
- 2022-09-23 CN CN202211162077.XA patent/CN115498729A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102545288A (en) * | 2010-12-28 | 2012-07-04 | 天宇通讯科技(昆山)有限公司 | Charging integrated system module for electric vehicle battery |
| CN102136613A (en) * | 2011-02-18 | 2011-07-27 | 江苏技术师范学院 | Valve-regulated lead-acid battery equalizing charge method |
| CN103138021A (en) * | 2013-03-07 | 2013-06-05 | 清华大学 | Battery charging method |
| CN103390917A (en) * | 2013-07-14 | 2013-11-13 | 鸥瑞智诺能源科技(北京)有限公司 | Built-in charging management type battery pack |
| CN108417917A (en) * | 2018-01-10 | 2018-08-17 | 中山大学 | A kind of lithium ion battery fast charge method |
| CN213027500U (en) * | 2020-09-11 | 2021-04-20 | 深圳天邦达科技有限公司 | Integrated device of DCDC converter and battery package |
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