CN117908935A - Battery pack orientation OTA method, device and storage medium based on ID - Google Patents
Battery pack orientation OTA method, device and storage medium based on ID Download PDFInfo
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Abstract
The invention discloses a battery pack orientation OTA method based on ID, which comprises the steps of starting up and initializing a 4G module; then the MCU collects and analyzes data from the CAN bus circulation queue, the data carries an ID of a battery module to be OTA and is stored in a memory circuit of the MCU; then the cloud downloads OTA data and stores the OTA data in a memory circuit of the MCU; and finally, the BMU receives or forwards the OTA data in the memory circuit, wherein the OTA data carries the ID of the battery module to be OTA, and the OTA is completed after the corresponding OTA data is acquired by the CMU of the battery module to be OTA. The method can carry out directional OTA upgrading on the replaced battery module, so that the problem that the whole battery pack can only be subjected to OTA after the battery module is replaced in the battery pack in the conventional OTA method is avoided, and the method of the OTA of the energy storage device is simplified.
Description
Technical Field
The present invention relates to the field of battery management systems, and in particular, to a battery pack orientation OTA method, device and storage medium based on ID.
Background
With the popularity of energy storage devices, battery management systems BMS (battery MANAGEMENT SYSTEM) have become increasingly important, with MCU (Microcontroller Unit) corresponding to the brain of the BMS. A battery management unit BMU (Battery management Unit) and a cell monitoring unit CMU (Cell monitor Unit) are also provided in the battery pack. The CMU is responsible for measuring parameters such as voltage, current, temperature and the like of each battery module of the battery pack and then transmitting the parameters to the BMU. The BMU is responsible for evaluating data transmitted by the CMU, if the data is abnormal, the battery module is protected, the current reduction requirement is sent out, or a charging and discharging passage is cut off, so that the battery module is prevented from exceeding the allowable use condition, and meanwhile, the electric quantity and the temperature of the battery module are managed.
For different usage scenarios and requirements, BMU and CMU typically need OTA upgrades. The traditional OTA mode in the energy storage field is uniform downloading and updating, namely, each OTA is aimed at the whole battery pack, and the mode is not suitable for the use scene of frequently replacing the battery module. The battery pack orientation OTA method is provided, and OTA upgrading is conducted on one or more battery modules in an orientation mode by utilizing different IDs of each battery module in the battery pack. When the battery module is replaced, a new battery module is given a new ID by referring to a patent (patent number: ZL202311496151.6, name: SN-based ID automatic allocation method, apparatus, and storage medium).
Disclosure of Invention
In order to solve the technical problems, the invention provides an ID-based battery pack orientation OTA method, wherein in the method, OTA data is downloaded by a cloud end and the ID of a corresponding battery module is carried by firstly acquiring the ID of the battery module to be subjected to OTA, and orientation OTA is completed after a BMU or a CMU of the OTA acquires the OTA data matched with the ID. The problem that OTA can only be carried out on the whole battery pack after the condition of replacing the battery module in the battery pack is solved.
The technical scheme adopted by the invention is as follows: an ID-based battery pack orientation OTA method according to one embodiment of the present invention includes the steps of:
s1: starting up and initializing a 4G module;
s2: the MCU acquires and analyzes data from the CAN bus circulation queue, the data carries an ID of a battery module to be OTA and is stored in a memory circuit of the MCU;
S3: the cloud downloads OTA data and stores the OTA data in a memory circuit of the MCU;
s4: the BMU receives or forwards the OTA data in the memory circuit, the OTA data carries an ID of a battery module to be OTA, and the OTA is completed after the corresponding OTA data is acquired by the CMU.
As an alternative to the technical solution of the present invention, the step S3 includes the following steps:
S3.1: the OTA module starts to work, the cloud platform uploads the updated firmware package and clicks push update, and the 4G module waits for receiving the updated firmware package of the platform;
s3.2: the 4G module analyzes the firmware package and acquires upgrade information, and if the analysis is wrong, the step S3.1 is returned;
S3.3: the MCU sends an OTA sub-packet downloading request and waits for a response, if the waiting time of the request is overtime and the overtime number is smaller than a threshold value, the MCU returns to and repeats the step S3.3, and if the overtime number is larger than the threshold value, the MCU returns to the step S1 to restart;
S3.4: and if the request waiting time is not overtime, accumulating the number of the request downloading packets, returning to and repeating the step S3.3 if the number of the downloading packets is not reached, and storing OTA data in a memory circuit of the MCU.
As an alternative to the technical solution of the present invention, the step S4 specifically includes the following steps:
S4.1: the 4G module sends an upgrade instruction, the BMU or the CMU resets to enter a Boot area after receiving the upgrade instruction, sets an upgrade mark, erases Flash and sends a ready message;
S4.2: the 4G module sends address information to the BMS after receiving a BMU or CMU ready command, otherwise, returns to the step S4.1, sends OTA data after receiving address confirmation sent by the BMU or CMU, checks whether the OTA data carrying ID is correct, and if so, finishes upgrading and returns to the step S2;
S4.3: after receiving OTA data, the BMU or the CMU writes and transmits the data to complete writing, and after receiving the confirmation of the completion of writing the data, the 4G module transmits an end frame, otherwise, the step S4.2 is returned;
S4.4: after receiving the end frame, the BMU or the CMU writes in a flag bit and performs CRC check, if the CRC check fails, the upgrading is ended, and returns to the step S4.1, and the 4G module receives the CRC check frame and performs check, otherwise returns to the step S4.3, and if the CRC check fails, the upgrading is ended, and returns to the step S4.1;
S4.5: after the CRC is successful, resetting an upgrade flag by the BMU or the CMU, sending an upgrade completion instruction, and completing software reset after the 4G module receives the upgrade completion instruction;
s4.6: and finishing upgrading.
As an alternative to the technical solution of the present invention, an ID-based battery pack orientation OTA device according to another embodiment of the present invention includes: the system comprises an upgrading module and a battery module, wherein the upgrading module comprises a 4G module, and a SIM card communication module and an antenna module are arranged in the 4G module; the battery module comprises an MCU, wherein the MCU is connected with a 4G module and a memory circuit and is connected with a BMU through a communication interface, and the BMU is connected with the CMU through a CAN bus. The ID-based battery pack orientation OTA device is configured to perform the ID-based battery pack orientation OTA method described above.
As an alternative of the technical solution of the present invention, the antenna module is a 4G antenna or a GPS antenna.
As an alternative of the technical scheme of the invention, the communication interface is a 485 interface, a CAN interface or a USB interface.
As an alternative of the technical solution of the present invention, the number of CMUs is not less than 2.
As an alternative to the technical solution of the present invention, according to another embodiment of the present invention, there is provided a computer apparatus including: the battery pack orientation OTA device comprises a memory and a processor, wherein the memory is used for storing a computer program, the processor is in communication connection with the memory, and the battery pack orientation OTA device based on the ID is executed when the computer program is called.
As an alternative to the solution of the present invention, according to another embodiment of the present invention, there is provided a computer readable storage medium having a computer program stored thereon, which when executed by a processor, implements the ID-based battery pack orientation OTA method described above.
The beneficial effects obtained by the invention are as follows: according to the battery pack orientation OTA method based on the ID, in the method, the ID of the battery module to be OTA is acquired, OTA data is downloaded in the cloud end and the ID of the corresponding battery module is carried, and orientation OTA is completed after the BMU or the CMU of the OTA acquires the OTA data matched with the ID. The method can carry out directional OTA upgrading on the replaced battery module, so that the problem that the whole battery pack can only be subjected to OTA after the battery module is replaced in the battery pack in the conventional OTA method is avoided, and the method of the OTA of the energy storage device is simplified.
The effects of the present invention are not limited to the above-described effects, and those skilled in the art can obtain effects not described above from the following description.
Drawings
Fig. 1 is a flowchart of an ID-based battery pack orientation OTA method according to an embodiment of the invention.
Fig. 2 is a battery pack-oriented OTA data cloud download flowchart based on ID according to an embodiment of the invention.
Fig. 3 is a flow chart of an ID-based battery pack directed OTA upgrade in accordance with an embodiment of the present invention.
Fig. 4 is a schematic diagram of an ID-based battery pack orientation OTA device according to an embodiment of the invention.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood that the following specific examples are intended to illustrate the invention and are not intended to limit the invention. All other embodiments, which can be made by a person skilled in the art without any inventive effort, are based on the following examples, which fall within the scope of the invention.
It should be noted that in the description of the present invention, the terms "comprises" and "comprising" indicate the presence of the described features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof, and are merely for convenience in describing the simplified description of the present invention and thus should not be construed as limiting the present invention. In the description of the embodiments, the terms "disposed," "connected," and the like are to be construed broadly unless otherwise specifically indicated and defined. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
Example 1
As shown in fig. 1, a flowchart of an ID-based battery pack orientation OTA method according to an embodiment of the present invention includes the following steps:
Step S1: the 4G module is started and initialized, wherein the 4G module can be an independent external module or integrated in a battery pack. For an external 4G module, a plurality of battery packs can share one 4G module, and when the battery packs are upgraded by OTA, the 4G module is inserted into a corresponding battery pack upgrading interface, so that the cost is low, but the battery packs need to be plugged and replaced; for the 4G module integrated in the battery pack, the 4G module is required to be arranged in each battery pack, so that the cost is high, and the use is convenient.
Step S2: the battery pack MCU collects data from the CAN bus circulation queue and analyzes the data, wherein the CAN bus circulation queue stores information and operation parameters of all battery modules, the battery modules comprise newly replaced battery modules, the MCU collects data from the CAN bus circulation queue and analyzes the data to obtain battery module data to be subjected to OTA, the data carry the battery module ID, and the MCU stores the battery module ID in a memory circuit of the MCU.
Step S3: the 4G module downloads OTA data from the cloud and stores the OTA data in a memory circuit of the MCU. Fig. 2 is a flowchart of ID-based battery pack directed OTA data cloud downloading according to an embodiment of the present invention, which specifically includes the following steps:
step S3.1: the OTA module starts to work, the cloud platform uploads the updated firmware package and clicks push update, and the 4G module waits for the receiving platform to update the firmware package.
Step S3.2: the 4G module receives the platform updating firmware package, analyzes the firmware package and acquires the updating information, if the analysis is correct, the step S3.3 is carried out, and if the analysis is wrong, the step S3.1 is returned.
Step S3.3: the MCU sends the OTA sub-packet downloading request and waits for response, if the request waiting time is not overtime, the step S3.4 is entered, if the request waiting time is overtime and the overtime times are smaller than the threshold value, the step S3.3 is returned and repeated, and if the overtime times are larger than the threshold value, the step S1 is returned to be restarted. Due to storage limitations, the above-mentioned OTA packets are split into OTA packets. Preferably, the above threshold setting is generally not less than 2.
Step S3.4: and if the request waiting time is not overtime, accumulating the number of the request downloading packets and judging whether the number of the downloading sub-packets is reached, if the number of the request downloading packets is up to the number of the downloading sub-packets, finishing downloading, storing OTA data in a memory circuit of the MCU, then entering step S4, and if the number of the request downloading packets is not up to the number of the downloading sub-packets, returning to and repeating step S3.3.
Step S4: and the BMU receives or forwards the OTA data in the memory circuit, wherein the OTA data carries an ID of a battery module to be OTA, if the OTA data is upgraded by the BMU, the BMU receives the data and then directly writes the data, if the OTA data is upgraded by the CMU, the BMU receives the data and then forwards the CMU, and the OTA battery module CMU acquires the corresponding OTA data to finish OTA. Fig. 3 is a flowchart of an ID-based battery pack-oriented OTA upgrade according to an embodiment of the present invention, which specifically includes the following steps:
step S4.1: the 4G module sends an upgrade instruction to the BMU or the CMU, the BMU or the CMU resets to enter a Boot area after receiving the upgrade instruction, sets an upgrade mark, erases Flash, sends a ready message, and if the BMU or the CMU does not receive the upgrade instruction, the 4G module resends the upgrade instruction.
Step S4.2: and if the 4G module does not receive the BMU or the CMU ready command, returning to the step S4.1, and sending address information to the BMS after the 4G module receives the BMU or the CMU ready command. If the BMU or the CMU does not receive the address information, the 4G module resends the address information, the BMU or the CMU sends data information which can be sent after receiving the address information, the data information which can be sent is confirmation information of the received address, and the 4G module sends OTA data after receiving the address confirmation information. And (2) checking whether the ID of the battery module to be OTA carried by the OTA data is correct, and if not, ending the upgrading and returning to the step (S2).
Step S4.3: if the BMU or the CMU does not receive the OTA data, returning to the step S4.2 to resend the transmittable data information, if the OTA data is received, judging whether the data receiving is finished, if the OTA data is not received, returning to the step S4.2 to continue to transmit the OTA data, if the OTA data is not received, writing the data and transmitting the data writing to finish, after the 4G module receives the data writing finishing confirmation, transmitting an end frame, and if the 4G module does not receive the data writing finishing confirmation or the BMU or the CMU does not receive the end frame, returning to the step S4.2 to resend the OTA data.
Step S4.4: after receiving the end frame, the BMU or the CMU writes the last written data and performs CRC check, and simultaneously sends a CRC check frame to the 4G module, if the CRC check fails, the updating is ended, the step S4.1 is returned to be restarted, if the 4G module does not receive the CRC check frame, the step S4.3 is returned to resend the end frame, if the 4G module receives the CRC check frame, the check is performed, and if the CRC check fails, the updating is ended, the step S4.1 is returned to be restarted. The last written data is a flag bit.
Step S4.5: and the BMU or the CMU and the 4G module are checked successfully, the BMU or the CMU resets the upgrading mark and checks the resetting condition of the upgrading mark, if the upgrading mark passes the check, an upgrading completion instruction is sent, and if the upgrading completion instruction does not pass the check or the 4G module does not receive the upgrading completion instruction, the upgrading mark is reset again. After receiving the upgrade completion instruction, the 4G module judges whether the software needs to be reset, if not, the upgrade is finished, and if so, the upgrade is finished after a reset command is sent. And the BMU or the CMU finishes upgrading after receiving the reset command and finishes upgrading if not receiving the reset command.
Step S4.6: after the BMU or the CMU and the 4G module receive the end instruction, the OTA upgrading is completed.
If the upgrading target is BMU in the upgrading step, the BMU communicates with the 4G module through the MCU, and the BMU receives OTA data in the memory circuit and writes the OTA data to complete upgrading; if the upgrading target is the CMU, the CMU communicates with the 4G module through the BMU and the MCU, and the BMU forwards the writing of the CMU to finish upgrading after receiving OTA data in the memory circuit.
In summary, the ID-based battery pack orientation OTA method can bring beneficial effects including, but not limited to: in the method, an MCU is used for acquiring the ID of a battery module to be subjected to OTA from a CAN bus circulation queue, the 4G module downloads OTA data in a cloud end and carries the ID of a corresponding battery module, and the directional OTA is completed after a BMU or a CMU of the OTA acquires the OTA data matched with the ID. The method can carry out directional OTA upgrading on the replaced battery module, so that the problem that the whole battery pack can only be subjected to OTA after the battery module is replaced in the battery pack in the conventional OTA method is avoided, and the method of the OTA of the energy storage device is simplified.
The effects of the present invention are not limited to the effects listed above, and those skilled in the art can derive effects not described above from the description.
Example two
Fig. 4 is a schematic diagram of an ID-based battery pack orientation OTA device according to an embodiment of the present invention, including an upgrade module and a battery module, where the upgrade module includes a 4G module, and a SIM card communication module and an antenna module are disposed in the 4G module. Preferably, the antenna module may be a 4G antenna or a GPS antenna. The battery module comprises an MCU, the MCU is connected with the 4G module, a memory circuit is further arranged for storing OTA data, the MCU is connected with the BMU through a communication interface, and the BMU is connected with the CMU through a CAN bus. Preferably, the communication interface may be a 485 interface, a CAN interface or a USB interface.
The battery module shown in fig. 4 only shows the case of one battery pack, the actual situation CAN also be a plurality of battery packs, one battery pack usually comprises a main control BMU and a plurality of slave control CMUs, the number of the CMUs is equal to the number of battery modules used in the battery pack, and is usually not lower than two, namely, each battery module is provided with one CMU, the main control BMU and the slave control CMUs are connected through the same communication bus, usually a CAN bus, and the BMU CAN receive signals sent by the CMUs through the communication bus and CAN also broadcast signals to the CMUs. Before the battery pack works, the BMS powers on the working system, so that the BMU powers on and simultaneously closes all the CMU power supply relays, and all the CMUs power on simultaneously.
In summary, the ID-based battery pack orientation OTA device is configured to perform the technical scheme according to the first embodiment, and its implementation principle and technical effects are similar, and will not be described herein.
Example III
The present invention also provides a computer device comprising a memory and a processor when implemented in software according to some or all of the technical solutions described in the first embodiment. The memory stores a computer program, and the processor is in communication connection with the memory, and executes the ID-based battery pack orientation OTA method according to the present invention when the computer program is called.
The processor may be a general-purpose processor, including a central processing unit (Central Processing Unit, abbreviated as CPU), a network processor (Network Processor, abbreviated as NP), etc.; but may also be a digital signal processor (DIGITAL SIGNAL processing, DSP), application SPECIFIC INTEGRATED circuit, ASIC, field programmable gate array (Field Programmable GATE ARRAY, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components.
Example IV
The present invention also provides a computer readable storage medium having stored thereon a computer program which when invoked by a processor implements the ID-based battery pack orientation OTA method of the present invention as described above. The computer-readable storage media may each include non-volatile and/or volatile memory. The nonvolatile memory can include Read Only Memory (ROM), programmable ROM (PROM), electrically Programmable ROM (EPROM), electrically Erasable Programmable ROM (EEPROM), or flash memory. Volatile memory can include Random Access Memory (RAM) or external cache memory. By way of illustration and not limitation, RAM is available in a variety of forms such as Static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double Data Rate SDRAM (DDRSDRAM), enhanced SDRAM (ESDRAM), synchronous link (SYNCHLINK) DRAM (SLDRAM), memory bus (rambus) direct RAM (RDRAM), direct memory bus dynamic RAM (DRDRAM), and memory bus dynamic RAM (RDRAM), among others.
It will be appreciated by those skilled in the art that embodiments of the application may be provided as a method, apparatus, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein.
The above embodiments of the ID-based battery pack orientation OTA method, apparatus and storage medium are merely exemplary of the preferred embodiments and are not intended to limit the present invention, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the present invention are intended to be included in the scope of the present invention. In addition, the technical solutions between the embodiments may be combined with each other, but must be based on the implementation by those of ordinary skill in the art; when the combination of the technical solutions is contradictory or impossible to realize, it should be considered that the combination of the technical solutions does not exist and is not within the scope of protection claimed by the present invention.
Claims (9)
1. An ID-based battery pack orientation OTA method, the method comprising the steps of:
s1: starting up and initializing a 4G module;
s2: the MCU acquires and analyzes data from the CAN bus circulation queue, the data carries an ID of a battery module to be OTA and is stored in a memory circuit of the MCU;
S3: the cloud downloads OTA data and stores the OTA data in a memory circuit of the MCU;
s4: the BMU receives or forwards the OTA data in the memory circuit, the OTA data carries an ID of a battery module to be OTA, and the OTA is completed after the corresponding OTA data is acquired by the CMU.
2. The ID-based battery pack orientation OTA method of claim 1 wherein said step S3 comprises the steps of:
S3.1: the OTA module starts to work, the cloud platform uploads the updated firmware package and clicks push update, and the 4G module waits for receiving the updated firmware package of the platform;
s3.2: the 4G module analyzes the firmware package and acquires upgrade information, and if the analysis is wrong, the step S3.1 is returned;
S3.3: the MCU sends an OTA sub-packet downloading request and waits for a response, if the waiting time of the request is overtime and the overtime number is smaller than a threshold value, the MCU returns to and repeats the step S3.3, and if the overtime number is larger than the threshold value, the MCU returns to the step S1 to restart;
S3.4: and if the request waiting time is not overtime, accumulating the number of the request downloading packets, returning to and repeating the step S3.3 if the number of the downloading packets is not reached, and storing OTA data in a memory circuit of the MCU.
3. The ID-based battery pack orientation OTA method of claim 1 wherein said step S4 specifically comprises the steps of:
S4.1: the 4G module sends an upgrade instruction, the BMU or the CMU resets to enter a Boot area after receiving the upgrade instruction, sets an upgrade mark, erases Flash and sends a ready message;
S4.2: the 4G module sends address information to the BMS after receiving a BMU or CMU ready command, otherwise, returns to the step S4.1, sends OTA data after receiving address confirmation sent by the BMU or CMU, checks whether the OTA data carrying ID is correct, and if so, finishes upgrading and returns to the step S2;
S4.3: after receiving OTA data, the BMU or the CMU writes and transmits the data to complete writing, and after receiving the confirmation of the completion of writing the data, the 4G module transmits an end frame, otherwise, the step S4.2 is returned;
S4.4: after receiving the end frame, the BMU or the CMU writes in a flag bit and performs CRC check, if the CRC check fails, the upgrading is ended, and returns to the step S4.1, and the 4G module receives the CRC check frame and performs check, otherwise returns to the step S4.3, and if the CRC check fails, the upgrading is ended, and returns to the step S4.1;
S4.5: after the CRC is successful, resetting an upgrade flag by the BMU or the CMU, sending an upgrade completion instruction, and completing software reset after the 4G module receives the upgrade completion instruction;
s4.6: and finishing upgrading.
4. An ID-based battery pack orientation OTA device comprising:
the upgrading module comprises a 4G module, wherein a SIM card communication module and an antenna module are arranged in the 4G module;
The battery module comprises an MCU, wherein the MCU is connected with the 4G module and the memory circuit and is connected with the BMU through a communication interface, and the BMU is connected with the CMU through a CAN bus;
The ID-based battery pack orientation OTA device is configured to perform the ID-based battery pack orientation OTA method of any one of claims 1 to 3.
5. The ID-based battery pack-oriented OTA device of claim 4 wherein the antenna module is a 4G antenna or a GPS antenna.
6. The ID-based battery pack orientation OTA device of claim 4 wherein the communication interface is a 485 interface, a CAN interface, or a USB interface.
7. The ID-based battery pack oriented OTA device of claim 5 wherein the CMU number is not less than 2.
8. A computer device, comprising: a memory for storing a computer program, and a processor in communication with the memory, the processor executing the ID-based battery pack orientation OTA method of any one of claims 1 to 3 when the computer program is invoked.
9. A computer readable storage medium having stored thereon a computer program, which when executed by a processor, implements the ID-based battery pack orientation OTA method of any one of claims 1 to 3.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410312678.7A CN117908935B (en) | 2024-03-19 | Battery pack orientation OTA method, device and storage medium based on ID |
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| CN202410312678.7A CN117908935B (en) | 2024-03-19 | Battery pack orientation OTA method, device and storage medium based on ID |
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| CN110588434A (en) * | 2019-09-17 | 2019-12-20 | 阳光电源股份有限公司 | Energy storage system and battery management method and system thereof |
| CN114201194A (en) * | 2021-11-24 | 2022-03-18 | 东莞新能安科技有限公司 | Parallel operation system upgrading method and device and parallel operation system |
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