A battery management system, control method and battery assembly based on digital twin

Abstract

The application relates to a battery management system, a control method and a battery assembly based on digital twinning, which comprises a battery BMS, a digital bidirectional twinning system, a digital BMS, a mirror control module, a big data background, a control digital pool, a historical problem module and a background development module. The digital bidirectional twinning system can separately control the battery BMS and the digital BMS; the mirror control module is connected with the digital BMS in control; the digital BMS can upload fault problems and solving measures to the historical problem module; the background development module can upload fault solving measures and updated modules to the big data background, and the big data background updates the same to the control digital pool; the control digital pool can receive the request of the BMS and the digital BMS to download corresponding fault solving measures and modules; and the historical problem module can upload fault problems and solving measures to the big data background. The system BMS can be remotely updated, and system fault problems can be shared.

Description

Technical Field

[0001] The present invention belongs to the technical field of power batteries, and specifically relates to a battery management system, a control method, a battery assembly and an electric vehicle based on digital twins. Background Art

[0002] Power batteries are a key component of new energy electric vehicles, and the battery management system (BMS) is a core technology for power batteries. Currently, BMS systems have two major issues: 1. They cannot be updated remotely; 2. System failures cannot be shared. Summary of the Invention

[0003] The purpose of the present invention is to provide a battery management system based on digital twins, and also to provide a control method, battery assembly and electric vehicle including the above-mentioned battery management system, so as to solve the problems in the prior art that the battery management system BMS cannot be updated remotely and system failure problems cannot be shared.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A battery management system based on digital twins includes a battery BMS1, a digital bidirectional twin system 2, a digital BMS3, a mirror control module 4, a big data background 5, a control digital pool 6, a historical problem module 7, and a background development module 8.

[0006] The two ends of the digital bidirectional twin system 2 are respectively connected to the battery BMS1 and the digital BMS3 control, and can control the battery BMS1 and the digital BMS3 separately; the mirror control module 4 is connected to the digital BMS3 control; the digital BMS3 is connected to the historical problem module 7, and can upload the fault problems and solutions to the historical problem module 7; the background development module 8 is connected to the big data background 5, and the big data background 5 is connected to the control digital pool 6. The background development module 8 can upload the fault solution measures and updated modules to the big data background 5, and the big data background 5 will update them to the control digital pool 6; the control digital pool 6 is respectively connected to the battery BMS1 and the digital BMS3, and can receive requests from BMS1 and digital BMS3 to download corresponding fault solution measures and modules; the historical problem module 7 is connected to the big data background 5, and can upload the fault problems and solutions to the big data background 5.

[0007] Furthermore, the battery BMS1 is arranged inside the battery pack, which can realize normal BMS signal collection and fault processing.

[0008] Furthermore, the digital BMS3 is arranged on the engineer client, and its layout is exactly the same as that of the battery BMS1, with a one-to-one layout; the signal acquisition of the digital BMS3 comes from the digital bidirectional twin system 2, and its other functions are consistent with those of the battery BMS1.

[0009] Furthermore, the data of the digital bidirectional twin system 2 is shared and updated synchronously, and the operation control of the battery BMS1 and the digital BMS3 can affect each other, and the update delay time is ≤10ms; when one of the battery BMS1 and the digital BMS3 at both ends of the digital bidirectional twin system 2 is controlled, the other is in a locked state and cannot be controlled within 500ms.

[0010] Furthermore, the digital BMS3 includes a simulation system, and the form of the simulation system includes but is not limited to a numerical model, a large-scale game, and a simulation model. The processing frequency of the digital BMS3 is 200ms.

[0011] Furthermore, the big data background 5 is arranged in a cloud database.

[0012] Furthermore, the control digital pool 6 can only receive requests from BMS1 and digital BMS3 to download corresponding fault solution measures and modules, and cannot perform operation control.

[0013] Furthermore, the historical problem module 7 includes faults of other vehicles 9 and laboratories 10 and their solutions.

[0014] Furthermore, the historical questions 7, the control digital pool 6 and the big data background 5 are in database mode.

[0015] A battery management system control method based on digital twins includes the following steps:

[0016] A. Signal reception: Battery BMS1 sends the fault signal of the battery BMS to the digital bidirectional twin system 2, which is then transmitted to the digital BMS3;

[0017] B. Fault handling and execution: Engineers handle BMS faults based on the fault signal transmitted to the digital BMS3, which can be divided into two situations:

[0018] B1: The fault can be solved. The engineer solves the fault in the mirror control module 4 and uploads the fault problem and solution to the historical problem module 7. At this time, the digital bidirectional twin system 2 ensures that the battery BMS1 fault is solved and enters the feedback analysis;

[0019] B2. If the engineer cannot resolve the fault, the backend development module 8 is required to upload the fault resolution measures and updated modules to the big data backend 5, which then updates them to the control digital pool 6. The engineer downloads the fault resolution measures and updated modules from the backend development module 8 to the digital BMS 3 in the mirror control module 4, and uploads the fault and resolution measures to the historical problem module 7. At this point, the digital bidirectional twin system 2 ensures that the battery BMS 1 fault is resolved, and feedback analysis begins.

[0020] C. The entire execution process of feedback analysis complies with the battery safety fault management level, and any fault is fed back to the signal receiver.

[0021] A battery assembly includes the digital twin-based battery management system.

[0022] An electric vehicle comprises the battery assembly.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention provides a battery management system based on digital twins, a control method thereof, a battery assembly and an electric vehicle. The battery management system BMS can easily achieve remote updates and enable smooth sharing of system failure problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 Flowchart of the battery management system control method based on digital twin.

[0027] 1. Battery BMS 2. Digital bidirectional twin system 3. Digital BMS 4. Mirror control module 5. Big data background 6. Control digital pool 7. Historical problem module 8. Backend development module 9. Other vehicles 10. Laboratory DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with embodiment:

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all structures.

[0030] It should be noted that similar reference numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Meanwhile, in the description of the present application, the terms "first", "second", and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] The present application is based on a battery management system of digital twinning, including a battery BMS 1, a digital bidirectional twinning system 2, a digital BMS 3, a mirror control module 4, a big data background 5, a control digital pool 6, a historical problem module 7, a background development module 8, other vehicles 9 and a laboratory 10.

[0032] The digital bidirectional twinning system 2 is respectively connected with the battery BMS 1 and the digital BMS 3 in control, and can separately control the battery BMS 1 and the digital BMS 3; the mirror control module 4 is connected with the digital BMS 3 in control; the digital BMS 3 is connected with the historical problem module 7, and can upload the fault problem and the solving measure to the historical problem module 7; the background development module 8 is connected with the big data background 5, and the big data background 5 is connected with the control digital pool 6, the background development module 8 can upload the fault solving measure and the updated module to the big data background 5, and the big data background 5 updates it to the control digital pool 6; the control digital pool 6 is connected with the battery BMS 1 and the digital BMS 3, and can receive the request of the BMS 1 and the digital BMS 3 to download the corresponding fault solving measure and module; the historical problem module 7 is connected with the big data background 5, and can upload the fault problem and the solving measure to the big data background 5.

[0033] The battery BMS 1 is a real battery BMS system, which is arranged in the battery pack to realize signal acquisition, fault processing and other functions of the normal BMS.

[0034] The digital BMS 3 is arranged in the engineer client, and is arranged in the same way as the battery BMS 1, that is, one-to-one arrangement; the signal acquisition of the digital BMS 3 is derived from the digital bidirectional twinning system 2, and other functions are consistent with the battery BMS 1.

[0035] The main function of the digital bidirectional twinning system 2 is to connect the battery BMS 1 and the digital BMS 3; the data of the digital bidirectional twinning system 2 is shared and updated synchronously, the operation control of the battery BMS 1 and the digital BMS 3 can affect each other, and the update delay time is ≤10ms; when one of the battery BMS 1 and the digital BMS 3 at both ends of the digital bidirectional twinning system 2 is controlled and operated, the other one is in a locked state and cannot be controlled and operated within 500ms.

[0036] The digital BMS3 includes a simulation system, and the simulation system includes but is not limited to numerical models, large-scale games, simulation models, etc. The digital BMS3 can only be used on the engineer side, without customer permissions, and the processing frequency of the digital BMS3 is 200ms.

[0037] The big data backend 5 is hosted in a cloud database. The control digital pool 6 can only receive requests from BMS1 and digital BMS3 to download corresponding troubleshooting solutions and modules, but cannot perform operational control. The historical problem module 7 contains faults and solutions from other vehicles 9 and the laboratory 10. The historical problem 7, control digital pool 6, and big data backend 5 operate in database mode.

[0038] like Figure 1 As shown, the battery management system control method based on digital twin of the present invention includes signal reception, fault processing, execution processing and feedback analysis steps.

[0039] Signal reception: Battery BMS1 sends the fault signal of the battery BMS to the digital bidirectional twin system 2, which transmits it to the digital BMS3 (the vehicle is required to be in the parked state at this time);

[0040] Fault handling and execution: Engineers handle BMS faults based on the fault signals transmitted to the digital BMS3, which can be divided into two situations:

[0041] a. If the fault is solvable, the engineer will resolve it in the mirror control module 4 and upload the fault problem and solution to the historical problem module 7. At this time, the digital bidirectional twin system 2 will ensure that the fault of the battery BMS1 is resolved and enter the feedback analysis;

[0042] b. Unable to resolve: The engineer cannot resolve the fault. The backend development module 8 is required to upload the fault resolution measures and updated modules to the big data backend 5, which then updates them to the control digital pool 6. The engineer downloads the fault resolution measures and updated modules from the backend development module 8 to the digital BMS 3 in the mirror control module 4, and uploads the fault and resolution measures to the historical problem module 7. At this point, the digital bidirectional twin system 2 ensures that the battery BMS 1 fault is resolved, and feedback analysis begins.

[0043] The entire feedback analysis process complies with the battery safety fault management level, and any fault will be fed back to the signal receiver.

[0044] The present invention also provides a battery assembly, and a battery management system based on digital twins.

[0045] The present invention also provides an electric vehicle comprising the battery assembly.

[0046] Example 1

[0047] A battery management system based on digital twin includes a battery BMS1, a digital bidirectional twin system 2, a digital BMS3, a mirror control module 4, a big data background 5, a control digital pool 6, a historical problem module 7, a background development module 8, other vehicles 9 and a laboratory 10.

[0048] The two ends of the digital bidirectional twin system 2 are controlled and connected to the battery BMS1 and the digital BMS3, respectively. The battery BMS1 is located inside the battery pack and performs normal BMS functions such as signal acquisition and fault handling. The digital BMS3 is located on the engineer client side, with a layout identical to the battery BMS1, a one-to-one arrangement. The digital BMS3 acquires signals from the digital bidirectional twin system 2, and its other functions are the same as those of the battery BMS1. The main function of the digital bidirectional twin system 2 is to connect the battery BMS1 and the digital BMS3. The data of the digital bidirectional twin system 2 is shared and updated synchronously. The operation and control of the battery BMS1 and the digital BMS3 can affect each other, with an update delay of ≤10ms. When either the battery BMS1 or the digital BMS3 at the two ends of the digital bidirectional twin system 2 is controlled, the other is locked and cannot be controlled for 500ms. The digital BMS3, including the simulation system, is only available to the engineer side and does not have client permissions. The processing frequency of the digital BMS3 is 200ms.

[0049] The mirror control module 4 is connected to the digital BMS 3. The digital BMS 3 is connected to the historical problem module 7 and can upload fault problems and solutions to the historical problem module 7. The background development module 8 is connected to the big data background 5, which is connected to the control digital pool 6. The background development module 8 can upload fault solutions and updated modules to the big data background 5, which updates them to the control digital pool 6. The control digital pool 6 is connected to the battery BMS 1 and the digital BMS 3 respectively, and can receive requests from BMS 1 and digital BMS 3 to download corresponding fault solutions and modules. The historical problem module 7 is connected to the big data background 5 and can upload fault problems and solutions to the big data background 5.

[0050] The big data backend 5 is hosted in a cloud database. The control digital pool 6 can only receive requests from BMS1 and digital BMS3 to download corresponding troubleshooting solutions and modules, but cannot perform operational control. The historical problem module 7 contains faults and solutions from other vehicles 9 and the laboratory 10. The historical problem 7, control digital pool 6, and big data backend 5 operate in database mode.

[0051] Example 2

[0052] A battery management system control method based on digital twins includes the following steps:

[0053] 1. Signal reception:

[0054] Battery BMS1 sends a fault signal of the battery BMS to the digital bidirectional twin system 2, which is then transmitted to the digital BMS3. At this time, the entire vehicle is required to be in a parked state;

[0055] 2. Troubleshooting and execution processing:

[0056] The engineer handles the BMS fault based on the fault signal transmitted to the digital BMS 3. If the fault can be resolved, the engineer resolves the fault in the mirror control module 4 and uploads the fault problem and solution to the historical problem module 7. At this point, the digital bidirectional twin system 2 ensures that the battery BMS 1 fault is resolved and enters the feedback analysis;

[0057] 3. The entire execution process of feedback analysis complies with the battery safety fault management level, and any fault will be fed back to the signal receiver.

[0058] Example 3

[0059] A battery management system control method based on digital twins includes the following steps:

[0060] 1. Signal reception:

[0061] Battery BMS1 sends a fault signal of the battery BMS to the digital bidirectional twin system 2, which is then transmitted to the digital BMS3. At this time, the entire vehicle is required to be in a parked state;

[0062] 2. Troubleshooting and execution processing:

[0063] Engineers process BMS faults based on the fault signal transmitted to the digital BMS3: If the fault cannot be resolved, the engineer cannot solve the fault problem. The backend development module 8 is required to upload the fault solution measures and the updated module to the big data backend 5, and the big data backend 5 updates it to the control digital pool 6. The engineer downloads the fault solution measures and the updated module from the backend development module 8 to the digital BMS3 in the mirror control module 4, and uploads the fault problem and the solution to the historical problem module 7. At this time, the digital bidirectional twin system 2 is used to ensure that the battery BMS1 fault is resolved and enter the feedback analysis;

[0064] 3. The entire execution process of feedback analysis complies with the battery safety fault management level, and any fault will be fed back to the signal receiver.

[0065] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A battery management system based on digital twins, characterized by: It includes battery BMS (1), digital two-way twin system (2), digital BMS (3), mirror control module (4), big data background (5), control digital pool (6), historical problem module (7) and background development module (8); The two ends of the digital bidirectional twin system (2) are respectively connected to the battery BMS (1) and the digital BMS (3) for control, and can respectively control the battery BMS (1) and the digital BMS (3); the mirror control module (4) is connected to the digital BMS (3); the digital BMS (3) is connected to the historical problem module (7) and can upload the fault problem and the solution to the historical problem module (7); the background development module (8) is connected to the big data background (5), and the big data background (5) is connected to the control digital pool (6); the background development module (8) can upload the fault solution and the updated module to the big data background (5), and the big data background (5) updates it to the control digital pool (6); the control digital pool (6) is respectively connected to the battery BMS (1) and the digital BMS (3), and can receive requests from the battery BMS (1) and the digital BMS (3) to download the corresponding fault solution and module; the historical problem module (7) is connected to the big data background (5), and can upload the fault problem and the solution to the big data background (5); The battery BMS (1) is arranged inside the battery pack and can realize signal acquisition and fault processing of a normal BMS; the digital BMS (3) is arranged on the engineer client side, and its arrangement form is exactly the same as that of the battery BMS (1), with a one-to-one arrangement; The signal acquisition of the digital BMS (3) is derived from the digital two-way twin system (2), and its other functions are consistent with those of the battery BMS (1); the data of the digital two-way twin system (2) is shared and updated synchronously, and the operation control of the battery BMS (1) and the digital BMS (3) can affect each other, and the update delay time is ≤10ms; when one of the battery BMS (1) and the digital BMS (3) at both ends of the digital two-way twin system (2) is controlled, the other is in a locked state and cannot be controlled within 500ms; the digital BMS (3) includes A simulation system, wherein the simulation system comprises a numerical model, a large-scale game, and a simulation model; the processing frequency of the digital BMS (3) is 200ms; the big data background (5) is arranged in a cloud database; the control digital pool (6) can only receive requests from the battery BMS (1) and the digital BMS (3) to download corresponding fault solution measures and modules, and cannot operate and control; the historical problem module (7) includes faults and solution measures of other vehicles (9) and laboratories (10); the historical problem module (7), the control digital pool (6), and the big data background (5) are in database mode.

2. A control method for a battery management system based on digital twins according to claim 1, characterized in that: The following steps are involved: A. Signal reception: The battery BMS (1) sends the fault signal of the battery BMS to the digital bidirectional twin system (2) which transmits it to the digital BMS (3); B. Fault handling and execution: Engineers handle BMS faults based on the fault signal transmitted to the digital BMS (3), which can be divided into two cases: B1. The fault can be solved. The engineer solves the fault in the mirror control module (4) and uploads the fault problem and the solution to the historical problem module (7). At this time, the digital two-way twin system (2) ensures that the battery BMS (1) fault is solved and enters the feedback analysis; B2. Unable to solve. If the engineer cannot solve the fault problem, the backend development module (8) is required to upload the fault solution measures and the updated module to the big data backend (5), and the big data backend (5) updates it to the control digital pool (6); the engineer downloads the fault solution measures and the updated module from the backend development module (8) to the digital BMS (3) in the mirror control module (4), and uploads the fault problem and the solution measures to the historical problem module (7); at this time, the digital two-way twin system (2) is used to ensure that the battery BMS (1) fault is solved and enters the feedback analysis; C. The entire execution process of feedback analysis complies with the battery safety fault management level, and any fault is fed back to the signal receiver.

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