New energy vehicle charging process safety guarantee device and detection guarantee method thereof

Abstract

The invention belongs to the technical field of new energy vehicle charging, and discloses a new energy vehicle charging process safety guarantee device and a detection guarantee method thereof.The new energy vehicle charging process safety guarantee device comprises a protection shell, a PCB board card is installed in the protection shell, a central control calculation unit and a communication module are installed on the PCB board card, and the communication module is connected with a charging pile through a wire harness; the wire harness comprises a power line and a first CAN line, the PCB card is connected with the power line, and the CAN communication unit is connected with the first CAN line; real-time monitoring and data analysis in the whole charging process of the new energy vehicle are achieved, a charging safety firewall is added for the new energy vehicle, and the charging safety of the new energy vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy vehicle charging, and in particular to a new energy vehicle charging process safety assurance device and a detection and assurance method thereof. Background Art

[0002] By June 2024, the number of motor vehicles in China has reached 440 million, and the number of new energy vehicles has reached 24.72 million, accounting for 7.17% of the total number of vehicles. In July, the sales penetration rate of new energy vehicles reached 51.1%, and it is expected that the number of new energy vehicles will reach 100 million in 2030. The accompanying new energy vehicles have prominent operational safety risks. According to statistics released by authoritative agencies, there are an average of 7 spontaneous combustion accidents per day, and the spontaneous combustion and explosion accidents caused during charging account for the highest proportion.

[0003] The charging process of new energy vehicles is completed by the cooperation of charging piles and on-board BMS to ensure the safety of the vehicle charging process. The main reasons for the frequent spontaneous combustion accidents during the charging process are as follows: 1. The causes of power battery accidents of new energy vehicles are diverse, so the causes of power battery accidents need to be analyzed based on the actual situation of new energy vehicles; 2. Charging piles and vehicle-mounted BMS are mostly based on the basic limit management of the safety of the power battery charging process, and cannot conduct in-depth analysis and safety assurance of problems such as SOC jump and excessive temperature increase; 3. The requirements of charging pile and vehicle BMS system manufacturers for the technical capabilities and risks of ensuring the safety of vehicle charging process vary; 4. Charging piles and on-board BMS systems do not have the ability to conduct multi-dimensional and in-depth analysis of power battery failures or this ability is obviously insufficient.

[0004] Therefore, the safety of the charging process of new energy vehicles in the current market is completely the responsibility of the charging piles and the on-board BMS system, and the equipment and methods used to ensure the safety of the charging process of new energy vehicles are in a blank state. Summary of the invention

[0005] The main technical problem to be solved by the present invention is to provide a new energy vehicle charging process safety assurance device and a detection and assurance method thereof, which realizes real-time monitoring and data analysis of the entire charging process of the new energy vehicle, adds a charging safety firewall for the new energy vehicle, and improves the charging safety of the new energy vehicle.

[0006] In order to solve the above technical problems, the present invention provides a technical solution as follows: A new energy vehicle charging process safety assurance device comprises a protective shell, a PCB board is installed inside the protective shell, a central control computing unit and a communication module are installed on the PCB board, the communication module is connected to a charging pile through a wiring harness, the wiring harness comprises a power line and a first CAN line, the PCB board is connected to the power line, and the CAN communication unit is connected to the first CAN line.

[0007] The following is a further optimization of the above technical solution by the present invention: The communication module includes a CAN communication unit, a 4G network unit and a WIFI network unit, and the CAN communication unit, the 4G network unit and the WIFI network unit are all electrically connected to the central control computing unit.

[0008] Further optimization: a leakage protection circuit breaker is installed in the charging pile, the PCB board is connected to the leakage protection circuit breaker through a power line, the charging pile is connected to a charging gun, a second CAN line is installed in the charging gun, and the CAN communication unit is connected in parallel with the second CAN line through the first CAN line.

[0009] Further optimization: a magnetic block is fixed on the rear wall of the protective shell.

[0010] In order to solve the above technical problems, another technical solution provided by the present invention is as follows: A detection and protection method for a safety protection device for a charging process of a new energy vehicle comprises the following steps: S1. Install the above-mentioned energy vehicle charging process safety device on the side wall of the charging pile through a magnetic suction block; S2, connect the power line to the leakage protection circuit breaker, and merge the first CAN line into the second CAN line; S3, energize the leakage protection circuit breaker; S4. During the charging process of new energy vehicles, the CAN communication unit monitors the data of each charging process of new energy vehicles; S5. The central control computing unit calculates and identifies the safety risks of each charging process of the new energy vehicle based on the collected data; If a safety risk occurs when a new energy vehicle is charging, the charging process of the new energy vehicle will be forcibly interrupted; S6. After charging is completed, the user uses a mobile phone to scan the code to view the battery safety and health status test report of the new energy vehicle.

[0011] The present invention adopts the above technical solution and has the following beneficial effects: 1. The present invention utilizes the CAN communication unit to monitor each charging process of new energy vehicles in real time, and performs multi-dimensional calculation and analysis on various monitored data to obtain the risk level of the battery on the new energy vehicle. If the risk level of the battery on the new energy vehicle reaches the set risk value, the charging process is immediately forced to terminate, thereby realizing the rapid avoidance of the safety risk of charging new energy vehicles and ensuring the safety of the charging process of new energy vehicles.

[0012] 2. The present invention is independently arranged outside the charging pile and the vehicle-mounted BMS system. It analyzes the charging safety through multi-dimensional calculation during the charging process of new energy vehicles, thereby adding a safety firewall to the safety of the charging process of new energy vehicles.

[0013] 3. The present invention is applicable to existing and newly produced DC charging piles of various manufacturers, and is not restricted by manufacturers or regions, thereby unifying safety risk standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0015] Figure 1 It is a schematic diagram of the overall structure of the first embodiment of the present invention; Figure 2 This is a schematic diagram of a PCB board in Embodiment 1 of the present invention; Figure 3 This is a circuit connection diagram of Embodiment 1 of the present invention; Figure 4 This is a control flow chart of Embodiment 1 of the present invention.

[0016] In the figure: 1. Protective shell; 2. PCB board; 3. Central control computing unit; 4. Communication module; 41. CAN communication unit; 42. 4G network unit; 43. WIFI network unit; 5. Wiring harness; 51. Power cord; 52. First CAN line; 6. Charging pile; 61. Leakage protection circuit breaker; 7. Charging gun; 71. Second CAN line. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] Embodiment 1 like Figure 1-Figure 4 As shown together, a new energy vehicle charging process safety assurance device includes a protective shell 1, a PCB board 2 is installed inside the protective shell 1, a central control computing unit 3 and a communication module 4 are installed on the PCB board 2, and the communication module 4 is connected to the charging pile 6 through a wiring harness 5. A magnetic suction block (not shown in the figure) is fixed on the rear wall of the protective shell 1.

[0019] In this embodiment, the safety assurance device is independent of the charging pile 6 and the vehicle-mounted BMS system, and becomes a firewall for the charging safety of new energy vehicles.

[0020] In this embodiment, the PCB board 2 may be a PCL-1716 PCB board produced by Advantech.

[0021] In this embodiment, the central control computing unit 3 can adopt a distributed central control computing unit of the BL-MTX900-ZK model produced by Guangdong Meidian Bell Technology Group Co., Ltd.

[0022] In this embodiment, the central control computing unit 3 is used to perform multi-dimensional calculation, statistics and analysis on the charging data, and can detect whether the safety factors of the charging process of the new energy vehicle have reached the risk level.

[0023] In this embodiment, the central control computing unit 3 may have built-in multiple power battery charging safety algorithms.

[0024] In this embodiment, multi-dimensional calculations can achieve in-depth analysis of the charging process of new energy vehicles, thereby making the safety risk monitoring of the charging process of new energy vehicles more comprehensive.

[0025] At the same time, based on the analysis, charging risks can be identified earlier, the charging process can be forced to be interrupted, and risks can be quickly avoided.

[0026] In this embodiment, the charging pile 6 is a DC charging pile currently used in the market.

[0027] In this embodiment, the protective shell 1 includes a back plate, the PCB board 2 is fixedly installed on the inner wall of the back plate, and a shell cover is arranged around the outer side of the PCB board 2. The shell cover is detachably installed on the front wall of the back plate to protect the PCB board 2.

[0028] In this embodiment, the installation method and installation principle of the PCB board 2 in the protective housing 1 constitute the prior art, which is well known to ordinary technicians in the field and will not be described in detail here.

[0029] The communication module 4 includes a CAN communication unit 41 , a 4G network unit 42 and a WIFI network unit 43 , and the CAN communication unit 41 , the 4G network unit 42 and the WIFI network unit 43 are all electrically connected to the central control computing unit 3 .

[0030] In this embodiment, the CAN communication unit 41 may adopt the ECC1000 series and CJ1M series CAN controllers produced by Omron Corporation.

[0031] In this embodiment, the 4G network unit 42 may adopt a 4G communication unit of model SFD4GM-01 produced by Wuhan Shengfan Electronics Co., Ltd.

[0032] In this embodiment, the 4G network unit 42 is used to upgrade the detection system and security algorithm to ensure the advancement and reliability of the detection algorithm.

[0033] In this embodiment, the WIFI network unit 43 may adopt a wireless communication unit of the ESP327266 series produced by Espressif Systems.

[0034] Moreover, the wiring harness 5 includes a power line 51 and a first CAN line 52 , the PCB board 2 is connected to the power line 51 , and the CAN communication unit 41 is connected to the first CAN line 52 .

[0035] In this embodiment, one of the two wiring harness connectors at the lower end of the PCB board 2 is a power line connector, and the other is a CAN line connector, and the CAN line connector is connected to the CAN communication unit 41.

[0036] In this embodiment, the connection methods and principles between the PCB board 2 and the power line 51, and between the CAN communication unit 41 and the first CAN line 52 constitute the prior art and will not be described in detail here.

[0037] In addition, a leakage protection circuit breaker 61 is installed in the charging pile 6, the PCB board 2 is connected to the leakage protection circuit breaker 61 through the power line 51, the charging pile 6 is connected to the charging gun 7, the charging gun 7 is installed with a second CAN line 71, and the CAN communication unit 41 is connected in parallel with the second CAN line 71 through the first CAN line 52.

[0038] In this embodiment, the structures, working principles and internal components of the charging pile 6 and the charging gun 7 constitute the prior art and will not be described in detail here.

[0039] Embodiment 2 A detection and protection method for a safety protection device for a charging process of a new energy vehicle comprises the following steps: S1. The energy vehicle charging process safety device is installed on the side wall of the charging pile 6 by means of a magnetic block.

[0040] In this embodiment, the magnetic attraction block may be a magnet block.

[0041] S2 , connecting the power line 51 to the leakage protection circuit breaker 61 , and merging the first CAN line 52 into the second CAN line 71 .

[0042] S3, energize the leakage protection circuit breaker 61.

[0043] S4. During the charging process of the new energy vehicle, the CAN communication unit 41 monitors the data of each charging process of the new energy vehicle.

[0044] S5. The central control computing unit 3 calculates and identifies the safety risks of each charging process of the new energy vehicle based on the collected data.

[0045] In this embodiment, the safety assurance device can automatically monitor each process of the vehicle charging, monitor the process data, and calculate and identify the safety risks of charging.

[0046] If a safety risk occurs when a new energy vehicle is charging, the charging process of the new energy vehicle will be forcibly interrupted.

[0047] S6. After charging is completed, the user uses a mobile phone to scan the code to view the battery safety and health status test report of the new energy vehicle.

[0048] In this embodiment, the user scans the QR code to connect to the WIFI network unit 43 .

[0049] In this embodiment, the user can not only view the test report after charging is completed, but also use the mobile phone to scan the code at any time during the charging process to view the real-time charging status and safety risk status of the new energy vehicle during charging.

[0050] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the invention, and the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A safety device for a new energy vehicle charging process, comprising a protective housing (1), characterized in that: A PCB board (2) is installed inside the protective shell (1); a central control computing unit (3) and a communication module (4) are installed on the PCB board (2); the communication module (4) is connected to the charging pile (6) via a wiring harness (5); the wiring harness (5) comprises a power line (51) and a first CAN line (52); the PCB board (2) is connected to the power line (51); and the CAN communication unit (41) is connected to the first CAN line (52).

2. A new energy vehicle charging process safety assurance device according to claim 1, characterized in that: The communication module (4) comprises a CAN communication unit (41), a 4G network unit (42) and a WIFI network unit (43); the CAN communication unit (41), the 4G network unit (42) and the WIFI network unit (43) are all electrically connected to the central control computing unit (3).

3. A new energy vehicle charging process safety assurance device according to claim 2, characterized in that: A leakage protection circuit breaker (61) is installed in the charging pile (6); the PCB board (2) is connected to the leakage protection circuit breaker (61) via a power line (51); the charging pile (6) is connected to a charging gun (7); a second CAN line (71) is installed in the charging gun (7); and the CAN communication unit (41) is connected in parallel with the second CAN line (71) via the first CAN line (52).

4. A new energy vehicle charging process safety assurance device according to claim 1, characterized in that: A magnetic block is fixed on the rear wall of the protective shell (1).

5. A detection and protection method for a safety protection device in a charging process of a new energy vehicle, characterized in that: The following steps are involved: S1. Install the new energy vehicle charging process safety assurance device according to claims 1 to 4 on the side wall of the charging pile (6) by means of a magnetic suction block; S2, connecting the power line (51) to the leakage protection circuit breaker (61), and merging the first CAN line (52) into the second CAN line (71); S3, energize the leakage protection circuit breaker (61); S4, during the charging process of the new energy vehicle, the CAN communication unit (41) monitors data of each charging process of the new energy vehicle; S5, the central control computing unit (3) calculates and identifies the safety risks of each charging process of the new energy vehicle based on the collected data; If a safety risk occurs when a new energy vehicle is charging, the charging process of the new energy vehicle will be forcibly interrupted; S6. After charging is completed, the user uses a mobile phone to scan the code to view the battery safety and health status test report of the new energy vehicle.

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