CN112959889A - Rapid power-off device for electric automobile in emergency - Google Patents
Rapid power-off device for electric automobile in emergency Download PDFInfo
- Publication number
- CN112959889A CN112959889A CN202110329320.1A CN202110329320A CN112959889A CN 112959889 A CN112959889 A CN 112959889A CN 202110329320 A CN202110329320 A CN 202110329320A CN 112959889 A CN112959889 A CN 112959889A
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- China
- Prior art keywords
- battery
- bms
- power
- ignition
- electric automobile
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/04—Cutting off the power supply under fault conditions
Abstract
The invention relates to the technical field of electric automobiles, in particular to a rapid power-off device for an electric automobile in an emergency situation, and aims to solve the technical problems that a high-voltage power-off device on the existing electric automobile is unreliable in performance and has potential safety hazards. The following technical scheme is adopted: including VCU, BMS and power battery, VCU passes through CAN bus connection with BMS, BMS passes through CAN bus connection with power battery, power battery's output is equipped with battery harness, its characterized in that: still including covering the ceramic package body in partial battery pencil outside, be equipped with TNT explosive and ignition in the ceramic package body, the TNT explosive contacts with the battery pencil, ignition contacts with the TNT explosive, and ignition passes through the CAN bus connection with BMS.
Description
Technical Field
The invention relates to the technical field of electric automobiles, in particular to a rapid power-off device for an electric automobile in an emergency.
Background
With the increasingly deep environmental protection concept, electric vehicles become a trend in the development of the automobile field. The existing electric automobile is provided with a high-voltage cut-off device which mainly comprises a power storage battery, a BMS (battery management system) and a VCU (vehicle control unit), wherein the power storage battery comprises a main negative relay, when an emergency occurs, the VCU sends a quick power-off signal to the BMS, then the BMS transmits the signal to the main negative relay of the power storage battery, the output of the power storage battery is cut off, and the high-voltage safety of the whole vehicle is protected. But there is certain potential safety hazard in current high voltage power failure device: when the emergency such as a car crash occurs, the main and negative relays may have hardware problems, so that the main and negative relay disconnection instruction sent by the VCU cannot be executed, the high voltage cannot be cut off, and the high voltage safety of the whole car can be greatly hidden.
Disclosure of Invention
The invention aims to solve the technical problems that the performance of a high-voltage power-off device on the existing electric automobile is unreliable and potential safety hazards exist. Therefore, the invention provides a rapid power-off device for an electric automobile in an emergency.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the rapid power-off device for the electric automobile in the emergency comprises a VCU, a BMS and a power storage battery, wherein the VCU is connected with the BMS through a CAN bus, the BMS is connected with the power storage battery through the CAN bus, and a battery wiring harness is arranged at the output end of the power storage battery; still including covering the ceramic package body in partial battery pencil outside, be equipped with TNT explosive and ignition in the ceramic package body, the TNT explosive contacts with the battery pencil, ignition contacts with the TNT explosive, and ignition passes through the CAN bus connection with BMS. When an emergency occurs, the cut-off of the high voltage is guaranteed by two ways: one is the conventional one, namely, the VCU sends a quick power-off signal to the BMS, and then the BMS transmits the signal to a main and negative relay of the power storage battery to cut off the output of the power storage battery; the other is that this application is newly increased, VCU sends the fast power off signal to BMS, and then BMS transmits this signal to ignition, and ignition starts to light the TNT explosive, and then fuses the battery pencil, realizes the cutting off of high-voltage electricity.
The invention has the beneficial effects that:
the invention provides a rapid power-off device for an electric automobile in an emergency, which is additionally provided with an ignition device, TNT explosive, a ceramic packaging body and other components on the basis of the conventional high-voltage power-off device.
Drawings
Fig. 1 is a schematic view of the overall structure of the quick power-off device of the present invention.
In the figure:
1-VCU; 2-BMS; 3, a power storage battery; 4, wiring harness of the battery; 5, a ceramic package; 6-TNT explosive; 7, an ignition device; 8, an air escape valve; 9-plastic shell.
Detailed Description
Referring to fig. 1, the quick power-off device for the electric vehicle in the emergency comprises a VCU1, a BMS2 and a power storage battery 3, wherein the VCU1 is connected with the BMS2 through a CAN bus, the BMS2 is connected with the power storage battery 3 through the CAN bus, and a battery harness 4 is arranged at the output end of the power storage battery 3; still including covering in the ceramic packaging body 5 of partial battery pencil 4 outside, be equipped with TNT explosive 6 and ignition 7 in the ceramic packaging body 5, TNT explosive 6 and battery pencil 4 contact, ignition 7 and the contact of TNT explosive 6, and ignition 7 and BMS2 pass through the CAN bus connection. When an emergency occurs, the cut-off of the high voltage is guaranteed by two ways: one is conventional, namely, the VCU1 sends a quick power-off signal to the BMS2, and then the BMS2 transmits the signal to a main and negative relay of the power storage battery 3 to cut off the output of the power storage battery 3; the other is newly added in the application, namely the VCU1 sends a quick power-off signal to the BMS2, then the BMS2 transmits the signal to the ignition device 7, the ignition device 7 is started to ignite the TNT explosive 6, and then the battery wire harness 4 is fused, so that the high-voltage electricity is cut off. This device has increased ignition 7 on current high-voltage power-off device's basis, TNT explosive 6, parts such as ceramic package 5, when meetting emergency, if the hardware problem has appeared in power storage battery 3's main negative relay, ignition 7 can also accept BMS 2's signal, through lighting TNT explosive 6 with 4 fuses of battery pencil, accomplish the cutting off of high-voltage point, realized the dual guarantee of electric automobile high-voltage power-off, eliminated whole car high-voltage potential safety hazard. In actual use, the battery harness 4 is connected to the CDU.
Further, an air release valve 8 is arranged on the ceramic packaging body 5. After the TNT explosive 6 explodes, the air pressure in the ceramic packaging body 5 is high, and the air release valve 8 is used for releasing pressure, so that the safety is ensured.
Further, a plastic shell 9 is arranged on the outer side of the ceramic package 5, and the plastic shell 9 plays a role in heat insulation.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (3)
1. Quick power-off device of electric automobile emergency, including VCU (1), BMS (2) and power battery (3), VCU (1) passes through CAN bus connection with BMS (2), BMS (2) passes through CAN bus connection with power battery (3), the output of power battery (3) is equipped with battery harness (4), its characterized in that: still including covering ceramic packaging body (5) in partial battery pencil (4) outside, be equipped with TNT explosive (6) and ignition (7) in ceramic packaging body (5), TNT explosive (6) and battery pencil (4) contact, ignition (7) and TNT explosive (6) contact, and ignition (7) pass through the CAN bus connection with BMS (2).
2. The sudden situation quick power-off device of the electric automobile according to claim 1, characterized in that: and the ceramic packaging body (5) is provided with an air escape valve (8).
3. The electric automobile emergency rapid power-off device according to any one of claims 1-2, characterized in that: a plastic shell (9) is arranged on the outer side of the ceramic packaging body (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110329320.1A CN112959889A (en) | 2021-03-28 | 2021-03-28 | Rapid power-off device for electric automobile in emergency |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110329320.1A CN112959889A (en) | 2021-03-28 | 2021-03-28 | Rapid power-off device for electric automobile in emergency |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112959889A true CN112959889A (en) | 2021-06-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110329320.1A Pending CN112959889A (en) | 2021-03-28 | 2021-03-28 | Rapid power-off device for electric automobile in emergency |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112959889A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5757150A (en) * | 1993-08-12 | 1998-05-26 | Fuji Electric Co., Ltd. | Electric system of an electric vehicle |
| US20120106017A1 (en) * | 2009-05-08 | 2012-05-03 | Auto Kabel Managementgesellschaft Mbh | Short-Circuit Protection for an Electric Vehicle Battery |
| US20150255975A1 (en) * | 2014-03-07 | 2015-09-10 | Ford Global Technologies, Llc | High voltage cutoff for electrified vehicles |
| CN105305370A (en) * | 2015-12-09 | 2016-02-03 | 吉少波 | Electric automobile short circuit protector |
| CN107599849A (en) * | 2017-07-14 | 2018-01-19 | 北汽福田汽车股份有限公司 | It is a kind of to test uncontrolled safety features and system for electric automobile |
| CN111279571A (en) * | 2017-10-25 | 2020-06-12 | 德州仪器公司 | High-temperature fuse circuit |
| CN111480214A (en) * | 2017-08-11 | 2020-07-31 | 卢阿格现代军火科技有限责任公司 | Pyrotechnic circuit-breaking device, system for charging an electric energy battery, mobile device and charging device |
| WO2020193466A1 (en) * | 2019-03-22 | 2020-10-01 | Eaton Intelligent Power Limited | Power distribution and circuit protection for a mobile application having a high efficiency inverter |
| CN212182498U (en) * | 2020-05-21 | 2020-12-18 | 大运汽车股份有限公司 | Novel battery rapid cooling control device |
-
2021
- 2021-03-28 CN CN202110329320.1A patent/CN112959889A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5757150A (en) * | 1993-08-12 | 1998-05-26 | Fuji Electric Co., Ltd. | Electric system of an electric vehicle |
| US20120106017A1 (en) * | 2009-05-08 | 2012-05-03 | Auto Kabel Managementgesellschaft Mbh | Short-Circuit Protection for an Electric Vehicle Battery |
| US20150255975A1 (en) * | 2014-03-07 | 2015-09-10 | Ford Global Technologies, Llc | High voltage cutoff for electrified vehicles |
| CN105305370A (en) * | 2015-12-09 | 2016-02-03 | 吉少波 | Electric automobile short circuit protector |
| CN107599849A (en) * | 2017-07-14 | 2018-01-19 | 北汽福田汽车股份有限公司 | It is a kind of to test uncontrolled safety features and system for electric automobile |
| CN111480214A (en) * | 2017-08-11 | 2020-07-31 | 卢阿格现代军火科技有限责任公司 | Pyrotechnic circuit-breaking device, system for charging an electric energy battery, mobile device and charging device |
| CN111279571A (en) * | 2017-10-25 | 2020-06-12 | 德州仪器公司 | High-temperature fuse circuit |
| WO2020193466A1 (en) * | 2019-03-22 | 2020-10-01 | Eaton Intelligent Power Limited | Power distribution and circuit protection for a mobile application having a high efficiency inverter |
| CN212182498U (en) * | 2020-05-21 | 2020-12-18 | 大运汽车股份有限公司 | Novel battery rapid cooling control device |
Non-Patent Citations (1)
| Title |
|---|
| 希奇: "陶瓷封装外壳的金属化工艺研究", 《景德镇陶瓷》 * |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210615 |