WO2020135882A1 - 电连接器和电动车的电池包的快换连接器 - Google Patents

电连接器和电动车的电池包的快换连接器 Download PDF

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Publication number
WO2020135882A1
WO2020135882A1 PCT/CN2019/130080 CN2019130080W WO2020135882A1 WO 2020135882 A1 WO2020135882 A1 WO 2020135882A1 CN 2019130080 W CN2019130080 W CN 2019130080W WO 2020135882 A1 WO2020135882 A1 WO 2020135882A1
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WO
WIPO (PCT)
Prior art keywords
electrical connector
vehicle
change
quick
optical fiber
Prior art date
Application number
PCT/CN2019/130080
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English (en)
French (fr)
Inventor
张建平
黄春华
Original Assignee
奥动新能源汽车科技有限公司
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Filing date
Publication date
Application filed by 奥动新能源汽车科技有限公司 filed Critical 奥动新能源汽车科技有限公司
Priority to JP2021537994A priority Critical patent/JP7370388B2/ja
Priority to SG11202107122WA priority patent/SG11202107122WA/en
Priority to EP19902189.0A priority patent/EP3904856A4/en
Priority to KR1020217024001A priority patent/KR102709105B1/ko
Publication of WO2020135882A1 publication Critical patent/WO2020135882A1/zh

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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
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H01M10/488—Cells or batteries combined with indicating means for external visualization of the condition, e.g. by change of colour or of light density
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
    • G01L1/00—Measuring force or stress, in general
    • G01L1/24—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet
    • G01L1/242—Measuring force or stress, in general by measuring variations of optical properties of material when it is stressed, e.g. by photoelastic stress analysis using infrared, visible light, ultraviolet the material being an optical fibre
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
    • G01M3/32—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators
    • G01M3/3236—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for containers, e.g. radiators by monitoring the interior space of the containers
    • 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
    • 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
    • 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
    • H01M10/48—Accumulators combined with arrangements for measuring, testing or indicating the condition of cells, e.g. the level or density of the electrolyte
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/172—Arrangements of electric connectors penetrating the casing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—Primary casings; Jackets or wrappings
    • H01M50/183—Sealing members
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/569—Constructional details of current conducting connections for detecting conditions inside cells or batteries, e.g. details of voltage sensing terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/005—Electrical coupling combined with fluidic coupling
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5216—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases characterised by the sealing material, e.g. gels or resins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5219—Sealing means between coupling parts, e.g. interfacial seal
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/66—Structural association with built-in electrical component
    • H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
    • H01R13/6683—Structural association with built-in electrical component with built-in electronic circuit with built-in sensor
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M2220/00—Batteries for particular applications
    • H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/64—Means for preventing incorrect coupling
    • H01R13/641—Means for preventing incorrect coupling by indicating incorrect coupling; by indicating correct or full engagement
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R2201/00—Connectors or connections adapted for particular applications
    • H01R2201/26—Connectors or connections adapted for particular applications for vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the invention belongs to the technical field of quick-change connectors for electric vehicles, and particularly relates to a quick-change connector for electric connectors and battery packs for electric vehicles.
  • FIGS. 1 and 2 show a prior art quick-change connector, which includes a battery-end connection part 101 and a vehicle-end connection part 102.
  • the battery-end connection member 101 is used to connect with the battery pack; the vehicle-end connection member 102 is used to connect with the vehicle.
  • the electrodes of the battery-end connection member 101 and the electrodes of the vehicle-end connection member 102 are correspondingly connected, and the gap between the battery-end connection member 101 and the vehicle-end connection member 102 is sealed by a gasket.
  • the sealing requirements should also be increased accordingly. If the seal level of the quick-change connector does not reach the IP67 standard (a level of protection and safety), it will cause the gap between the battery-end connection part 101 and the vehicle-end connection part 102 of the quick-change connector to be protected during the driving of the vehicle Failure, water ingress, electrical performance failure, insulation failure of the vehicle, the vehicle controller will cut off the electrical protection, the vehicle will not be able to drive, severe electrical short-circuit due to sealing failure, vehicle spontaneous combustion will occur. Therefore, connector sealing is particularly important.
  • the sealing condition of the quick-change connector cannot be automatically detected on the vehicle. Only after the vehicle fails to detect the water ingress of the connector after the sealing failure occurs, the insulation value is lower than the set value, and the vehicle alarms and stops. In fact, it has been It can't be effectively controlled. Only after returning to the 4S shop (a sales shop that integrates car sales, maintenance, accessories and information services) can it continue to drive, which causes great inconvenience to users and affects the user's driving feeling for the use of fast-changing vehicles. .
  • the technical problem to be solved by the embodiments of the present invention is to overcome the defect that the sealing condition of the quick-change connector of the battery pack of the electric vehicle in the prior art cannot be automatically detected on the vehicle, and to provide an electric connector and a battery of the electric vehicle Quick-change connector for bags.
  • the invention provides an electrical connector, which includes a pole and a first accommodating cavity surrounding the pole, and further includes a sealing detection device.
  • the sealing detection device includes a pressure detection unit, and the pressure detection unit is located in the first accommodation cavity and is used to detect the first The pressure changes when a receiving chamber is in a sealed state.
  • the electrical connector further includes a strain controller; the strain controller is used for receiving pressure changes and for issuing an alarm instruction signal when the pressure changes are greater than a preset value.
  • the pressure detection unit includes an optical fiber strain sensor, the detection end of the optical fiber strain sensor is provided in the first accommodating cavity, the optical fiber of the optical fiber strain sensor is led out of the first accommodating cavity, and the strain controller is disposed in the first accommodating cavity Externally, the strain controller is connected to the optical fiber to receive pressure changes.
  • the electrical connector is provided with a lead-out hole
  • the optical fiber is led out to the outside of the first accommodating cavity through the lead-out hole, and the gap between the optical fiber and the lead-out hole is sealed by a sealing member.
  • the sealing member includes an epoxy resin sealing member or an organic silicone sealing member.
  • the strain controller is electrically connected to the battery management system of the vehicle, and the strain controller is used to send an alarm instruction signal to the battery management system.
  • the battery management system is electrically connected to the vehicle controller of the vehicle, and the battery management system is used to send an alarm instruction signal to the vehicle controller.
  • the electrical connector further includes an alarm unit, which is electrically connected to the strain controller.
  • the alarm unit is used for alarming after receiving the alarm instruction signal.
  • the invention also provides a quick-change connector for a battery pack of an electric vehicle, which includes a vehicle-end connection component and the electrical connector of the present invention; the electrical connector is used as a battery-end connection component of the quick-change connector for connecting with the battery pack
  • the vehicle-end connection component is used to connect with the vehicle; the vehicle-end connection component is docked with the electrical connector to seal the first receiving cavity.
  • the vehicle-end connecting member is provided with a second contact portion, and the first contact portion and the second contact portion are correspondingly provided;
  • the quick-change connector further includes a gasket, and the first contact portion and the second contact portion squeeze the gasket , So that the vehicle-end connecting parts are docked with the electrical connector.
  • the positive progress effect of the present invention is that the present invention detects the change of the air pressure of the cavity of the quick-change connector through the pressure detection unit, and judges whether the seal of the quick-change connector is normal in time, so as to promptly alarm and avoid vehicle failure.
  • FIG. 1 is a perspective schematic view of a prior art quick-change connector.
  • FIG. 2 is a schematic structural diagram of a battery-end connection component and a vehicle-end connection component of a prior art quick-change connector.
  • FIG 3 is a cross-sectional view of an electrical connector according to a preferred embodiment of the present invention.
  • FIG. 4 is a partial structural diagram of an electrical connector according to a preferred embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a fiber optic strain sensor of an electrical connector according to a preferred embodiment of the present invention.
  • FIG. 6 is a schematic diagram of a partial structure of an electrical connector including an optical fiber strain sensor according to a preferred embodiment of the present invention.
  • FIG. 7 is a cross-sectional view of a quick-change connector of a battery pack of an electric vehicle according to a preferred embodiment of the present invention.
  • FIG. 8 is a schematic structural view of a quick-change connector of a battery pack for an electric vehicle according to a preferred embodiment of the invention.
  • the electrical connector 21 includes a pole 211 and a first receiving cavity 212 surrounding the pole 211.
  • the number of the pole 211 is plural.
  • the electrical connector 21 further includes a seal detection device.
  • the seal detection device includes a pressure detection unit, which is located in the first receiving chamber 212 and is used to detect a pressure change when the first receiving chamber 212 is in a sealed state.
  • the pressure detection unit is implemented by using an optical fiber strain sensor 213, and the number of optical fiber strain sensors 213 is two.
  • the optical fiber strain sensor 213 includes a strain sheet 231, a transparent glass tube 232, and an optical fiber 233.
  • the working principle of the optical fiber strain sensor is: the optical fiber 233 emits a laser beam of a specific wavelength to the front strain sheet 231.
  • the strain sheet deforms, and the deformation affects the wavelength of light.
  • the wavelength change can be calculated Changes in air pressure.
  • the detection end of the optical fiber strain sensor 213 (that is, the strain sheet 231) is disposed in the first accommodating cavity 212, and the optical fiber 233 of the optical fiber strain sensor 213 is led out of the first accommodating cavity 212.
  • the electrical connector 21 is provided with a lead-out hole 216, a transparent glass tube 232 (represented by a dotted line) is embedded inside the lead-out hole 216, an optical fiber 233 is led out through the lead-out hole 216 to the outside of the first accommodating cavity 212, and the optical fiber 233 is in the lead-out
  • the portion inside the hole 216 is characterized by a dotted line.
  • the gap between the optical fiber 233 and the extraction hole 216 is sealed by the sealing member 222.
  • the sealing member When there is a gap between the transparent glass tube 232 and the inner wall of the lead-out hole 216, the sealing member also fills the gap.
  • the sealing component is an epoxy resin sealing component.
  • the sealing member is an organic silicone sealing member. Epoxy resin adhesives and organic silica gel are commercially available materials.
  • the plug 215 of the electrical connector 21 is used to connect to the battery pack of the vehicle.
  • the electrical connector of this embodiment further includes a strain controller (not shown in the figure).
  • the strain controller is disposed outside the first receiving chamber 212, and the strain controller is connected to the optical fiber to receive pressure changes.
  • the strain controller issues an alarm command signal.
  • the initial pressure value in the first accommodating chamber 212 is A.
  • the pressure value in the first accommodating chamber 212 is less than A ⁇ 80%, that is, the pressure change is greater than 20% of the initial pressure value, it means the first The sealing performance of the accommodating cavity 212 has not met the requirements, and the strain controller issues an alarm instruction signal.
  • the strain controller emits laser light of the first wavelength to the strain sheet 231 through the optical fiber 233, the wavelength of the received back light is the second wavelength, and the strain controller calculates the first wavelength according to the second wavelength The initial pressure value in the containing chamber 212.
  • the wavelength of the received back light is the third wavelength, and the strain controller according to the third The change of the wavelength with respect to the second wavelength can calculate the change range of the pressure value in the first accommodating chamber 212 relative to the initial pressure value at this time.
  • the change range is greater than a preset value (for example, 20%)
  • the strain controller Issue an alarm command signal.
  • the strain controller is electrically connected to the battery management system of the vehicle, and the strain controller sends an alarm instruction signal to the battery management system.
  • the battery management system is electrically connected to the vehicle controller of the vehicle. After receiving the alarm instruction signal from the strain controller, the battery management system sends the alarm instruction signal to the vehicle controller.
  • the vehicle controller sends a prompt message to the user of the vehicle (for example, the driver) through the center console, and the user of the vehicle performs maintenance in a timely manner.
  • the electrical connector further includes an alarm unit, which is electrically connected to the strain controller, and the alarm unit is used for alarming after receiving the alarm instruction signal.
  • the alarm unit includes at least one of an alarm light and a buzzer. The user of the vehicle can promptly know that the sealing performance of the electrical connector has deteriorated according to the warning light or buzzer promptly, and carry out maintenance in time.
  • the electrical connector 21 of this embodiment is provided with a first contact portion, and a sealing pad 214 matching the shape of the first contact portion is provided on the first contact portion.
  • the gasket 214 includes a clamping portion 217, and the clamping portion 217 is embedded in the insertion groove 218 on the first contact portion.
  • the electrical connector of this embodiment detects the change of the air pressure of the first accommodating cavity through the pressure detecting unit, and judges in time whether the sealing of the first accommodating cavity is normal, thereby promptly alarming and improving the safety of the electrical connection at a low cost.
  • the quick-change connector includes a vehicle-end connection member 102 and the electrical connector 21 of this embodiment.
  • the electrical connector 21 serves as a battery-end connection member of the quick-change connector, and is connected to the battery pack through the plug 215.
  • the vehicle-end connection member 102 is used to connect with a vehicle.
  • the vehicle-end connection member 102 is butted with the electrical connector 21, and the second contact portion of the vehicle-end connection member 102 and the first contact portion of the electrical connector 21 press the gasket 214 to seal the first receiving cavity 212.
  • the pole 211 of the electrical connector 21 is connected to the corresponding pole 121 in the vehicle-end connecting member 102 to transmit electrical signals.
  • the sealing level of the first accommodating cavity 212 meets the IP67 standard.
  • the strain controller calculates the initial pressure value in the first accommodating cavity 212 according to the wavelength of the laser light reflected by the strain sheet 231 of the optical fiber strain sensor 213, and the strain controller stores the initial pressure value.
  • the strain controller calculates the real-time pressure value in the first receiving cavity 212 according to the wavelength of the laser light reflected by the strain sheet 231 of the optical fiber strain sensor 213, and the strain controller stores the real-time pressure value Pressure value, and calculate the difference between the real-time pressure value and the initial pressure value.
  • the strain controller sends an alarm command signal to the battery management system.
  • the battery management system After receiving the alarm command signal from the strain controller, the battery management system sends the alarm command signal to the vehicle controller.
  • the vehicle controller sends a prompt message to the user of the vehicle (for example, the driver) through the center console, and the user of the vehicle performs maintenance in a timely manner.
  • the electrical connector further includes an alarm unit, which is electrically connected to the strain controller, and the alarm unit is used for alarming after receiving the alarm instruction signal.
  • the alarm unit includes at least one of an alarm light and a buzzer. The user of the vehicle can promptly know that the sealing performance of the electrical connector has deteriorated according to the warning light or buzzer promptly, and carry out maintenance in time.
  • the quick-change connector of the battery pack of the electric vehicle of this embodiment detects the change of the air pressure of the cavity (ie, the first accommodating cavity) of the quick-change connector through the pressure detection unit, and timely determines whether the quick-change connector is properly sealed. In this way, it can report to the police in time, avoid vehicle failure, and improve the safety of electric vehicles at a very low cost.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Secondary Cells (AREA)
  • Details Of Connecting Devices For Male And Female Coupling (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Connector Housings Or Holding Contact Members (AREA)

Abstract

一种电连接器和电动车的电池包的快换连接器，其中电连接器（21）包括极柱（211）以及围绕极柱（211）的第一容纳腔（212），还包括密封检测装置，密封检测装置包括压力检测单元，压力检测单元位于第一容纳腔（212）内，用于检测第一容纳腔（212）处于密封状态时的压力变化。通过压力检测单元检测快换连接器的型腔的气压的变化，及时判断出快换连接器的密封是否正常，从而及时报警，避免车辆故障。

Description

电连接器和电动车的电池包的快换连接器
本申请要求申请日为2018/12/29的中国专利申请2018116422779的优先权。本申请引用上述中国专利申请的全文。
技术领域
本发明属于电动车的快换连接器技术领域，尤其涉及一种电连接器和电动车的电池包的快换连接器。
背景技术
电动汽车采用快换连接器实现快换插拔的功能。图1、图2示出了现有技术的快换连接器，该快换连接器包括电池端连接部件101和车端连接部件102。电池端连接部件101用于与电池包连接；车端连接部件102用于与车辆连接。电池端连接部件101和车端连接部件102组合后，电池端连接部件101的电极与车端连接部件102的电极对应连接，电池端连接部件101和车端连接部件102的缝隙由密封垫密封，电池端连接部件101和车端连接部件102之间存在型腔。
在实现快换插拔的同时电连接安全可靠非常重要，在满足电连接可靠的同时，密封要求也要相应提高。如果快换连接器的密封级别达不到IP67标准(一种防护安全级别)，则会导致车辆在行驶过程中，快换连接器的电池端连接部件101和车端连接部件102的缝隙处防护失效，发生进水，电气性能失效，整车报绝缘故障，整车控制器会切断电气保护，车辆无法行驶，严重的会出现由于密封失效电气短路，车辆自燃的现象。故连接器密封尤为重要。
目前，快换连接器的密封状况在车辆上无法实现自动检测，只有出现密封失效后整车检测到连接器进水后，绝缘值出现低于设定值，车辆报警停车，实际上此时已经无法有效控制，只有回4S店(集汽车销售、维修、配件和信息服务为一体的销售店)维修后方可继续行驶，此时造成用户极大的不便，影响用户对快换车辆使用的驾驶感。
发明内容
本发明实施例要解决的技术问题是为了克服现有技术的电动车的电池包的快换连接器的密封状况在车辆上无法实现自动检测的缺陷，提供一种电连接器和电动车的电池包的快换连接器。
本发明实施例是通过下述技术方案来解决上述技术问题：
本发明提供一种电连接器，包括极柱以及围绕极柱的第一容纳腔，还包括密封检测装置，密封检测装置包括压力检测单元，压力检测单元位于第一容纳腔内，用于检测第一容纳腔处于密封状态时的压力变化。
较佳地，电连接器还包括应变控制器；应变控制器用于接收压力变化，并用于在压力变化大于预设值时发出报警指令信号。
较佳地，压力检测单元包括光纤应变传感器，光纤应变传感器的检测端设置于第一容纳腔内，光纤应变传感器的光纤引出至第一容纳腔的外部，应变控制器设置于第一容纳腔的外部，应变控制器与光纤连接以接收压力变化。
较佳地，电连接器上设置有引出孔，光纤穿过引出孔引出至第一容纳腔的外部，光纤与引出孔之间的空隙由密封部件密封。
较佳地，密封部件包括环氧树脂胶密封部件或有机硅胶密封部件。
较佳地，应变控制器与车辆的电池管理系统电连接，应变控制器用于向电池管理系统发送报警指令信号。
较佳地，电池管理系统与车辆的整车控制器电连接，电池管理系统用于向整车控制器发送报警指令信号。
较佳地，电连接器还包括报警单元，报警单元与应变控制器电连接，报警单元用于在接收到报警指令信号后报警。
本发明还提供一种电动车的电池包的快换连接器，包括车端连接部件和本发明的电连接器；电连接器作为快换连接器的电池端连接部件，用于与电池包连接；车端连接部件用于与车辆连接；车端连接部件与电连接器对接，以使第一容纳腔密封。
较佳地，车端连接部件上设置有第二接触部，第一接触部和第二接触部对应设置；快换连接器还包括密封垫，第一接触部和第二接触部挤压密封垫，以使车端连接部件与电连接器对接。
本发明的积极进步效果在于：本发明通过压力检测单元检测快换连接器的型腔的气压的变化，及时判断出快换连接器的密封是否正常，从而及时报警，避免车辆故障。
附图说明
图1为现有技术的快换连接器的立体示意图。
图2为现有技术的快换连接器的电池端连接部件和车端连接部件的结构示意图。
图3为本发明的一较佳实施例的电连接器的剖视图。
图4为本发明的一较佳实施例的电连接器的局部结构示意图。
图5为本发明的一较佳实施例的电连接器的光纤应变传感器的结构示意图。
图6为本发明的一较佳实施例的电连接器的包含光纤应变传感器的局部结构示意图。
图7本发明的一较佳实施例的电动车的电池包的快换连接器的剖视图。
图8为发明的一较佳实施例的电动车的电池包的快换连接器的结构示意图。
具体实施方式
下面通过一较佳实施例的方式进一步说明本发明，但并不因此将本发明限制在所述的实施例范围之中。
本实施例提供一种电连接器，参照图3、图4、图5，该电连接器21包括极柱211以及围绕极柱211的第一容纳腔212，极柱211的数量为多个。电连接器21还包括密封检测装置，密封检测装置包括压力检测单元，压力检测单元位于第一容纳腔212内，用于检测第一容纳腔212处于密封状态时的压力变化。在本实施例中，压力检测单元采用光纤应变传感器213实现，光纤应变传感器213的数量为2个。光纤应变传感器213包括应变薄片231、透明玻璃管232、光纤233。光纤应变传感器的工作原理为：通过光纤233发射特定波长的激光束到前面的应变薄片231，空气压力变化的时候，应变薄片产生形变，形变对对光的波长产生影响，通过波长变化可以计算得到空气压力的变化。
在本实施例中，参照图6，光纤应变传感器213的检测端(即应变薄片231)设置于第一容纳腔212内，光纤应变传感器213的光纤233引出至第一容纳腔212的外部。电连接器21上设置有引出孔216，透明玻璃管232(采用虚线表征)嵌设于引出孔216的内部，光纤233穿过引出孔216引出至第一容纳腔212的外部，光纤233处于引出孔216内的部分采用虚线表征。光纤233与引出孔216之间的空隙由密封部件222密封。当透明玻璃管232与引出孔216的内壁之间存在缝隙时，密封部件也填充该缝隙。该密封部件为环氧树脂胶密封部件。在其他可选的实施方式中，该密封部件为有机硅胶密封部件。环氧树脂胶和有机硅胶均为市售可得的材料。电连接器21的插头215用于与车辆的电池包连接。
本实施例的电连接器还包括应变控制器(图中未示出)，应变控制器设置于第一容纳腔212的外部，应变控制器与光纤连接以接收压力变化。当压力变化大于预设值时，应变控制器发出报警指令信号。例如，设第一容纳腔212内的初始压力值为A，当第一容纳腔212内的压力值小于A·80％，也即，压力变化大于初始压力值的20％时，则表示第一容纳腔212的密封性能已经不满足要求，应变控制器发出报警指令信号。具体为，在 初始状态下，应变控制器通过光纤233向应变薄片231发射第一波长的激光，接收到发射回的对光的波长为第二波长，应变控制器根据第二波长计算得到第一容纳腔212内的初始压力值。随着该电连接器的使用周期的延长，当应变控制器通过光纤233向应变薄片231发射第一波长的激光，接收到发射回的对光的波长为第三波长，应变控制器根据第三波长相对于第二波长的变化，可以计算出此时第一容纳腔212内的压力值相对与初始压力值的变化幅度，当该变化幅度大于预设值(例如20％)时，应变控制器发出报警指令信号。在本实施例中，应变控制器与车辆的电池管理系统电连接，应变控制器向电池管理系统发送报警指令信号。电池管理系统与车辆的整车控制器电连接，电池管理系统从应变控制器接收报警指令信号后，向整车控制器发送报警指令信号。整车控制器通过中控台向车辆的用户(例如，司机)发出提示信息，车辆的用户及时进行检修。
在其他可选的实施方式中，电连接器还包括报警单元，报警单元与应变控制器电连接，报警单元用于在接收到报警指令信号后报警。报警单元包括报警灯、蜂鸣器中的至少一种。车辆的用户根据报警灯或者蜂鸣器的提示，可以及时获知电连接器的密封性能变差，及时进行检修。
本实施例的电连接器21设置有第一接触部，第一接触部上设置有与第一接触部的形状相匹配的密封垫214。具体参照图3，密封垫214包括一卡接部217，卡接部217嵌设于第一接触部上的嵌槽218内。当本实施例的电连接器作为电动车的电池包的快换连接器的电池端连接部件与车端连接部件对接时，车端连接部件上的第二接触部与电连接器21的第一接触部挤压密封垫214，从而实现对第一容纳腔212的密封。
本实施例的电连接器通过压力检测单元检测第一容纳腔的气压的变化，及时判断出第一容纳腔的密封是否正常，从而及时报警，以很低的成本提高了电连接的安全性。
本实施例还提供一种电动车的电池包的快换连接器，参照图7、图8，该快换连接器包括车端连接部件102和本实施例的电连接器21。电连接器21作为该快换连接器的电池端连接部件，通过插头215与电池包连接。车端连接部件102用于与车辆连接。车端连接部件102与电连接器21对接，车端连接部件102的第二接触部与电连接器21的第一接触部挤压密封垫214，以使第一容纳腔212密封。
车端连接部件102与电连接器21对接后，电连接器21的极柱211与车端连接部件102中相对应的极柱121连接，以传递电信号。
车端连接部件102与电连接器21对接后，第一容纳腔212的密封级别满足IP67标准。车端连接部件102与电连接器21对接后，应变控制器根据光纤应变传感器213的应变薄片231反射的激光的波长计算得到第一容纳腔212内的初始压力值，应变控制器存 储该初始压力值。在本实施例的快换连接器的使用过程中，应变控制器根据光纤应变传感器213的应变薄片231反射的激光的波长计算得到第一容纳腔212内的实时压力值，应变控制器存储该实时压力值，并计算该实时压力值与初始压力值的差值。当实时压力值相比于初始压力值减小方幅度超过预设幅度值时，则表示第一容纳腔212的密封状况已经不满足IP67标准。例如，设第一容纳腔212内的初始压力值为A，当第一容纳腔212内的实时压力值小于A·80％，也即，实施压力值相比于初始压力值减小的幅度大于20％时，应变控制器向电池管理系统发送报警指令信号。电池管理系统从应变控制器接收报警指令信号后，向整车控制器发送报警指令信号。整车控制器通过中控台向车辆的用户(例如，司机)发出提示信息，车辆的用户及时进行检修。
在其他可选的实施方式中，电连接器还包括报警单元，报警单元与应变控制器电连接，报警单元用于在接收到报警指令信号后报警。报警单元包括报警灯、蜂鸣器中的至少一种。车辆的用户根据报警灯或者蜂鸣器的提示，可以及时获知电连接器的密封性能变差，及时进行检修。
本实施例的电动车的电池包的快换连接器通过压力检测单元检测快换连接器的型腔(即第一容纳腔)的气压的变化，及时判断出快换连接器的密封是否正常，从而及时报警，避免车辆故障，以很低的成本提高了电动车的安全性。
虽然以上描述了本发明的具体实施方式，但是本领域的技术人员应当理解，这些仅是举例说明，在不背离本发明的原理和实质的前提下，可以对这些实施方式做出多种变更或修改。因此，本发明的保护范围由所附权利要求书限定。

Claims (10)

  1. 一种电连接器，包括极柱以及围绕所述极柱的第一容纳腔，其特征在于，还包括密封检测装置，所述密封检测装置包括压力检测单元，所述压力检测单元位于所述第一容纳腔内，用于检测第一容纳腔处于密封状态时的压力变化。
  2. 如权利要求1所述的电连接器，其特征在于，所述电连接器还包括应变控制器；所述应变控制器用于接收所述压力变化，并用于在所述压力变化大于预设值时发出报警指令信号。
  3. 如权利要求2所述的电连接器，其特征在于，所述压力检测单元包括光纤应变传感器，所述光纤应变传感器的检测端设置于所述第一容纳腔内，所述光纤应变传感器的光纤引出至所述第一容纳腔的外部，所述应变控制器设置于所述第一容纳腔的外部，所述应变控制器与所述光纤连接以接收所述压力变化。
  4. 如权利要求3所述的电连接器，其特征在于，所述电连接器上设置有引出孔，所述光纤穿过所述引出孔引出至所述第一容纳腔的外部，所述光纤与所述引出孔之间的空隙由密封部件密封。
  5. 如权利要求4所述的电连接器，其特征在于，所述密封部件包括环氧树脂胶密封部件或有机硅胶密封部件。
  6. 如权利要求2所述的电连接器，其特征在于，所述应变控制器与所述车辆的电池管理系统电连接，所述应变控制器用于向所述电池管理系统发送所述报警指令信号。
  7. 如权利要求6所述的电连接器，其特征在于，所述电池管理系统与所述车辆的整车控制器电连接，所述电池管理系统用于向所述整车控制器发送所述报警指令信号。
  8. 如权利要求2所述的电连接器，其特征在于，所述电连接器还包括报警单元，所述报警单元与所述应变控制器电连接，所述报警单元用于在接收到所述报警指令信号后报警。
  9. 一种电动车的电池包的快换连接器，其特征在于，包括车端连接部件和如权利要求1-8中任意一项所述的电连接器；所述电连接器作为所述快换连接器的电池端连接部件，用于与电池包连接；所述车端连接部件用于与车辆连接；所述车端连接部件与所述电连接器对接，以使所述第一容纳腔密封。
  10. 如权利要求9所述的电动车的电池包的快换连接器，其特征在于，所述车端连接部件上设置有第二接触部，所述第一接触部和所述第二接触部对应设置；所述快换连接器还包括密封垫，所述第一接触部和所述第二接触部挤压所述密封垫，以使所述车端连接部件与所述电连接器对接。
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