CN105006406A - DC relay - Google Patents
DC relay Download PDFInfo
- Publication number
- CN105006406A CN105006406A CN201510357186.0A CN201510357186A CN105006406A CN 105006406 A CN105006406 A CN 105006406A CN 201510357186 A CN201510357186 A CN 201510357186A CN 105006406 A CN105006406 A CN 105006406A
- Authority
- CN
- China
- Prior art keywords
- binding post
- permanent magnet
- direct current
- assembly
- current relay
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/16—Magnetic circuit arrangements
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/02—Bases; Casings; Covers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H50/00—Details of electromagnetic relays
- H01H50/14—Terminal arrangements
Abstract
The invention discloses a DC relay, which comprises a static assembly, a movable assembly, a magnetic circuit assembly and a magnetic blow-out assembly. The static assembly comprises a supporting plate, a metal outer shell, a ceramic cover plate, a first wiring terminal and a second wiring terminal; the movable assembly comprises a central spindle and a movable piece; the magnetic circuit assembly is in drive connection with the movable piece through the central spindle; the magnetic blow-out assembly comprises a first permanent magnet and a second permanent magnet; the first wiring terminal and the second wiring terminal are arranged between the first permanent magnet and the second permanent magnet, the polarity of the first permanent magnet pointing the end surface of the first wiring terminal is different from that of the second permanent magnet pointing the end surface of the second wiring terminal; and the direction of a magnetic field formed by the first wiring terminal and the second wiring terminal is parallel to a surface of a current loop composed of the first wiring terminal, the movable piece and the second wiring terminal. The DC relay with the structural design has the advantages of convenient installation, long service life and high use safety.
Description
Technical field
The present invention relates to a kind of direct current relay, particularly relate to a kind of high voltage direct current relay.
Background technology
Existing high voltage direct current relay is a kind of closed type relay, applies ceramic packaging technology.Due to the requirement of mechanical performance and electric property, large for the ceramic cavity thickness encapsulated, weight is large.Separately because high voltage direct current relay exists phenomenon of arc discharge in the process disconnected, also need external magnetic field arc extinguishing, external magnetic field is provided by the paired magnet be close to outside ceramic cavity, therefore general high voltage direct current relay volume is large, Heavy Weight, and have higher requirement to installing space, be difficult to use in comparatively small space.
In addition, the external magnetic field direction of existing high voltage direct current relay is vertical with the current circuit that two binding posts are formed, thus makes the electric current in external high tension loop have strict direction to require to realize magnetic quenching.If reversal connection situation appears in external high tension loop, pitting of contact aggravates, and product temperature rise aggravates, service life reduction, and fail safe is lowered.
Summary of the invention
The object of the invention is to overcome weak point of the prior art, provide a kind of easy for installation, increase the service life, improve the direct current relay of safety in utilization.
The object of the invention is to be achieved through the following technical solutions:
A kind of direct current relay, comprising: quiet assembly, dynamic assembly, magnetic circuit assembly and magnetic blow-out assembly;
Described quiet assembly comprises: supporting plate, metal shell, ceramic cover plate, the first binding post and the second binding post, the two ends of described metal shell are welded with described ceramic cover plate and described supporting plate and form annular seal space respectively, and described first binding post, the second binding post are arranged in described ceramic cover plate and are partially housed in described annular seal space;
Described dynamic assembly comprises: axle core and moving plate, described axle core is arranged in described supporting plate, described magnetic circuit assembly is driven with described moving plate be connected by described axle core, and it is interior and abut with described first binding post, the second binding post or be separated that described moving plate is contained in described annular seal space;
Described magnetic blow-out assembly comprises: the first permanent magnet and the second permanent magnet, described first permanent magnet, the second permanent magnet are contained in described annular seal space, described first binding post, the second binding post are between described first permanent magnet, the second permanent magnet, and the polarity of the end face of described first permanent magnet, described first binding post of the second permanent magnet sensing, the second binding post is different;
The face that forms of current circuit that the magnetic direction that described first permanent magnet, the second permanent magnet are formed is parallel to described first binding post, moving plate, the second binding post are formed.
Preferably, described direct current relay also comprises gas-filled tube, and described gas-filled tube is arranged in described supporting plate and through with described annular seal space.
Preferably, described direct current relay also comprises base and upper cover, described base and described upper cover are connected to form hollow cavity, described quiet assembly, magnetic circuit assembly, dynamic assembly and magnetic blow-out assembly are contained in described hollow cavity, cover on described and offer through hole, described first binding post, the second binding post are arranged in described through hole.
Preferably, described magnetic circuit assembly comprises: coil, sleeve, iron core, back-moving spring and limited post, described sleeve welds with described supporting plate, described iron core is connected with described limited post by described back-moving spring, described iron core, back-moving spring, limited post are contained in described sleeve, described sleeve is contained in described coil, and described iron core welds with described axle core, and described axle core is arranged in described back-moving spring and described limited post.
Preferably, transition pad and cushion pad is provided with between described iron core and described sleeve.
Preferably, described magnetic circuit assembly also comprises U-shaped frame, and described U-shaped frame and described supporting plate are connected to form hollow frame, and described coil, sleeve, iron core, back-moving spring and limited post are positioned at described hollow frame.
Preferably, described magnetic circuit assembly also comprises skeleton, and described coil is located in described hollow frame by described skeleton.
Preferably, described dynamic assembly also comprises: jump ring, buffer spring, and described jump ring is connected on described axle core, and described buffer spring to be sheathed on described axle core and to be connected between described jump ring and described moving plate, and described axle core slides and is arranged in described moving plate.
Preferably, packing ring is provided with between described jump ring and described buffer spring.
Preferably, packing ring is provided with between described moving plate and described axle core.
The operation principle of direct current relay is described:
After coil electricity, magnetic field is formed in the magnetic loop of U-shaped frame, supporting plate composition, iron core, limited post are magnetized, under magnetic interaction, iron core moves, compressing back-moving spring, and drives dynamic component integration motion, until moving plate and the first binding post, the second binding post collide, buffer spring is now in the oppression state.The buffer spring of oppression state provides moving plate and the first binding post, the second binding post to keep in touch required pressure, and now, the output be made up of the first binding post, the second binding post keeps on-state;
After coil blackout, magnetic field dissipate in magnetic loop, the back-moving spring release of compressing, drive dynamic assembly counter motion, and then moving plate is disconnected with the first binding post, the second binding post contact, now, the output be made up of the first binding post, the second binding post switches to off-state by on-state.
Magnetic quenching principle is described, the magnetic direction that the first permanent magnet, the second permanent magnet are formed is parallel to the first binding post, the face that forms of current circuit that moving plate, the second binding post are formed.
Known according to " left hand rule ", no matter electric current is flow to the second binding post by the first binding post, or flow to the first binding post by the second binding post, in the moment that moving plate and the first binding post, the second binding post disconnect, under the effect of magnetic force, the electric arc that the electric arc that the first binding post produces, the second binding post produce all with motion in the other direction, there will not be move toward one another, thus can pitting of contact be reduced, reduce temperature rise.
And existing direct current relay, the plane orthogonal that external magnetic field direction and current circuit are formed, therefore, the electric current in external high tension loop has strict direction to require to realize magnetic quenching, reduces pitting of contact, reduces temperature rise.If reversal connection situation appears in external high tension loop, pitting of contact aggravates, and product temperature rise aggravates, service life reduction, and fail safe is lowered.
The direct current relay of this kind of structure, has following beneficial effect:
1, the mode adopting metal shell to be combined with ceramic cover plate, replaces most of packaging ceramic with stamping forming sheet metal, thus the overall weight of direct current relay is alleviated;
2, the first permanent magnet, the second permanent magnet are built in annular seal space, reduce occupying of volume, convenient installation;
3, the face that forms of current circuit that the magnetic direction that the first permanent magnet, the second permanent magnet are formed is parallel to the first binding post, moving plate, the second binding post are formed, this kind of structural design is to the polarity no requirement (NR) of output;
4, the smart structural design of magnetic circuit assembly and dynamic assembly, magnetic circuit assembly is by arranging coil, sleeve, iron core, back-moving spring, limited post, dynamic assembly is by arranging axle core, moving plate, jump ring, buffer spring, back-moving spring is made to have the function of reset, realize moving plate and the first binding post, being automatically separated of the second binding post, buffer spring is made to have the function of buffering, the sharp impacts of anti-locking plate and the first binding post, the second binding post.
The direct current relay of this kind of structural design has easy for installation, long service life, advantage safe to use.
Accompanying drawing explanation
Fig. 1 is the decomposition chart of the direct current relay of one embodiment of the invention;
The internal structure cutaway view that Fig. 2 is the direct current relay shown in Fig. 1;
Fig. 3 is the installation diagram of metal shell, ceramic cover plate, the first binding post and the second binding post;
Fig. 4 is the enlarged drawing of direct current relay at A place of Fig. 1;
Fig. 5 is the installation diagram of axle core, jump ring, buffer spring, moving plate;
A wherein schematic diagram in the face that the current circuit that Fig. 6 is the first permanent magnet, the magnetic direction of the second permanent magnet formation is parallel to the first binding post, moving plate, the second binding post are formed is formed;
Another schematic diagram in the face that the current circuit that Fig. 7 is the first permanent magnet, the magnetic direction of the second permanent magnet formation is parallel to the first binding post, moving plate, the second binding post are formed is formed.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
As shown in Figure 1, it is the decomposition chart of the direct current relay 10 of one embodiment of the invention, sees also Fig. 2, and it is the internal structure cutaway view of the direct current relay 10 shown in Fig. 1.
Direct current relay 10 comprises: quiet assembly 100, magnetic circuit assembly 200, dynamic assembly 300 and magnetic blow-out assembly 400.Magnetic circuit assembly 200, for driving dynamic assembly 300, makes dynamic assembly 300 coordinate with quiet assembly 100, thus is switched on or switched off power supply, and the phenomenon of arc discharge produced when magnetic blow-out assembly 400 is for disconnecting power supply carries out magnetic field arc extinguishing.
See also Fig. 3, quiet assembly 100 comprises: supporting plate 110, metal shell 120, ceramic cover plate 130, first binding post 140, second binding post 150.The two ends of metal shell 120 are welded with ceramic cover plate 130 and supporting plate 110 respectively and form annular seal space 500, and the first binding post 140, second binding post 150 is arranged in ceramic cover plate 130 and is partially housed in annular seal space 500.Concrete, metal shell 120 and ceramic cover plate 130 soldering connect, metal shell 120 and supporting plate 110 laser welding, and the first binding post 140, second binding post 150 connects with ceramic cover plate 130 soldering.In the present embodiment; direct current relay 10 also comprises gas-filled tube 160; gas-filled tube 160 is arranged in supporting plate 110 and through with annular seal space 500; in annular seal space 500, hydrogen is filled with by gas-filled tube 160; hydrogen has good reproducibility; the metal be oxidized due to electric shock in annular seal space 500 can be played a protective role, the useful life of elongated component.
Dynamic assembly 300 comprises: axle core 310 and moving plate 320.Axle core 310 is arranged in supporting plate 110, and magnetic circuit assembly 200 is driven with moving plate 320 by axle core 310 and is connected, and it is interior and abut with the first binding post 140, second binding post 150 or be separated that moving plate 320 is contained in annular seal space 500.
Magnetic blow-out assembly 400 comprises: the first permanent magnet 410, second permanent magnet 420.First permanent magnet 410, second permanent magnet 420 is contained in annular seal space 500, first binding post 140, second binding post 150 is between the first permanent magnet 410, second permanent magnet 420, and the polarity that the first permanent magnet 410, second permanent magnet 420 points to the end face of the first binding post 140, second binding post 150 is contrary.
The face that the current circuit that the magnetic direction that first permanent magnet 410, second permanent magnet 420 is formed is parallel to the first binding post 140, moving plate 320, second binding post 150 is formed is formed.
Be noted that magnetic circuit assembly 200 comprises: coil 210, sleeve 220, iron core 230, back-moving spring 240, limited post 250.Sleeve 220 and supporting plate 110 laser welding, iron core 230 is connected with limited post 250 by back-moving spring 240, iron core 230, back-moving spring 240, limited post 250 are contained in sleeve 220, and iron core 230 and axle core 310 laser welding, axle core 310 is arranged in back-moving spring 240 and limited post 250.
Further, be provided with transition pad 260 and cushion pad 270 between iron core 230 and sleeve 220, transition pad 260 is metallic gasket, and cushion pad 270 is rubber sheet gasket.
Further, magnetic circuit assembly 200 also comprises U-shaped frame 280 and skeleton 290.U-shaped frame 280 is connected to form hollow frame 600 with supporting plate 110, and coil 210, sleeve 220, iron core 230, back-moving spring 240 and limited post 250 are contained in hollow frame 600.Coil 210 is located in hollow frame 600 by skeleton 290.
Please refer to Fig. 4 and Fig. 5, be also noted that dynamic assembly 300 also comprises: jump ring 330, buffer spring 340.Jump ring 330 is connected on axle core 310, and buffer spring 340 is sheathed on axle core 310, and buffer spring 340 is connected between jump ring 330 and moving plate 320, and axle core 310 slides and is arranged in moving plate 320.
Further, between jump ring 330 and buffer spring 340, be provided with packing ring, between moving plate 320 and axle core 310, be provided with packing ring.By arranging packing ring, further increase jump ring 330 and buffer spring 340, the connective stability of moving plate 320 and axle core 310.
Also be noted that, direct current relay 10 also comprises base 700 and upper cover 800, base 700 and upper cover 800 are connected to form hollow cavity, quiet assembly 100, magnetic circuit assembly 200, dynamic assembly 300 and magnetic blow-out assembly 400 are contained in hollow cavity, upper cover 800 offers through hole 810, the first binding post 140, second binding post 150 is arranged in through hole 810.Base 700 and upper cover 800 form containment vessel, serve protective effect to built-in parts.
Below, the operation principle of direct current relay 10 is described:
After coil 210 is energized, magnetic field is formed in the magnetic loop that U-shaped frame 280, supporting plate 110 form, make iron core 230, limited post 250 magnetizes, under magnetic interaction, iron core 230 moves, compressing back-moving spring 240, and drives dynamic assembly 300 mass motion, until moving plate 320 and the first binding post 140, second binding post 150 collide, buffer spring 340 is now in the oppression state.The buffer spring 340 of oppression state provides moving plate 320 and the first binding post 140, second binding post 150 to keep in touch required pressure, and now, the output be made up of the first binding post 140, second binding post 150 keeps on-state;
After coil 210 power-off, magnetic field dissipate in magnetic loop, the back-moving spring 240 of compressing discharges, drive dynamic assembly 300 counter motion, and then moving plate 320 is disconnected with the first binding post 140, second binding post 150 contact, now, the output be made up of the first binding post 140, second binding post 150 switches to off-state by on-state.
Magnetic quenching principle is described, please refer to the schematic diagram of Fig. 6, Fig. 7, the face that the current circuit that known, the magnetic direction that the first permanent magnet 410, second permanent magnet 420 is formed is parallel to the first binding post 140, moving plate 320, second binding post 150 is formed is formed.
Known according to " left hand rule ", no matter electric current is flow to the second binding post 150 by the first binding post 140, or flow to the first binding post 140 by the second binding post 150, in the moment that moving plate 320 and the first binding post 140, second binding post 150 disconnect, under the effect of magnetic force, the electric arc that the electric arc that first binding post 140 produces, the second binding post 150 produce is all with motion (F1, F2 are for Impact direction) in the other direction, there will not be move toward one another, thus can pitting of contact be reduced, reduce temperature rise.
And existing direct current relay, the plane orthogonal that external magnetic field direction and current circuit are formed, therefore, the electric current in external high tension loop has strict direction to require to realize magnetic quenching, reduces pitting of contact, reduces temperature rise.If reversal connection situation appears in external high tension loop, pitting of contact aggravates, and product temperature rise aggravates, service life reduction, and fail safe is lowered.
The direct current relay 10 of this kind of structure, has following beneficial effect:
1, the mode adopting metal shell 120 to be combined with ceramic cover plate 130, replaces most of packaging ceramic with stamping forming sheet metal 120, thus the overall weight of direct current relay 10 is alleviated;
2, the first permanent magnet 410, second permanent magnet 420 is built in annular seal space 500, reduces occupying of volume, convenient installation;
3, the face that the current circuit that the magnetic direction that the first permanent magnet 410, second permanent magnet 420 is formed is parallel to the first binding post 140, moving plate 320, second binding post 150 is formed is formed, this kind of structural design is to the polarity no requirement (NR) of output;
4, the smart structural design of magnetic circuit assembly 200 and dynamic assembly 300, magnetic circuit assembly 200 is by arranging coil 210, sleeve 220, iron core 230, back-moving spring 240, limited post 250, dynamic assembly 300 is by arranging axle core 310, moving plate 320, jump ring 330, buffer spring 340, back-moving spring 240 is made to have the function of reset, realize automatically being separated of moving plate 320 and the first binding post 140, second binding post 150, buffer spring 340 is made to have the function of buffering, the sharp impacts of anti-locking plate 320 and the first binding post 140, second binding post 150.
The direct current relay 10 of this kind of structural design has easy for installation, long service life, advantage safe to use.
Above-described embodiment is the present invention's preferably execution mode; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (10)
1. a direct current relay, is characterized in that, comprising: quiet assembly, dynamic assembly, magnetic circuit assembly and magnetic blow-out assembly;
Described quiet assembly comprises: supporting plate, metal shell, ceramic cover plate, the first binding post and the second binding post, the two ends of described metal shell are welded with described ceramic cover plate and described supporting plate and form annular seal space respectively, and described first binding post, the second binding post are arranged in described ceramic cover plate and are partially housed in described annular seal space;
Described dynamic assembly comprises: axle core and moving plate, described axle core is arranged in described supporting plate, described magnetic circuit assembly is driven with described moving plate be connected by described axle core, and it is interior and abut with described first binding post, the second binding post or be separated that described moving plate is contained in described annular seal space;
Described magnetic blow-out assembly comprises: the first permanent magnet and the second permanent magnet, described first permanent magnet, the second permanent magnet are contained in described annular seal space, described first binding post, the second binding post are between described first permanent magnet, the second permanent magnet, and the polarity of the end face of described first permanent magnet, described first binding post of the second permanent magnet sensing, the second binding post is different;
The face that forms of current circuit that the magnetic direction that described first permanent magnet, the second permanent magnet are formed is parallel to described first binding post, moving plate, the second binding post are formed.
2. direct current relay according to claim 1, is characterized in that, described direct current relay also comprises gas-filled tube, and described gas-filled tube is arranged in described supporting plate and through with described annular seal space.
3. direct current relay according to claim 1, it is characterized in that, described direct current relay also comprises base and upper cover, described base and described upper cover are connected to form hollow cavity, described quiet assembly, magnetic circuit assembly, dynamic assembly and magnetic blow-out assembly are contained in described hollow cavity, cover on described and offer through hole, described first binding post, the second binding post are arranged in described through hole.
4. direct current relay according to claim 1, it is characterized in that, described magnetic circuit assembly comprises: coil, sleeve, iron core, back-moving spring and limited post, described sleeve welds with described supporting plate, described iron core is connected with described limited post by described back-moving spring, and described iron core, back-moving spring, limited post are contained in described sleeve, and described sleeve is contained in described coil, described iron core welds with described axle core, and described axle core is arranged in described back-moving spring and described limited post.
5. direct current relay according to claim 4, is characterized in that, is provided with transition pad and cushion pad between described iron core and described sleeve.
6. direct current relay according to claim 4, it is characterized in that, described magnetic circuit assembly also comprises U-shaped frame, and described U-shaped frame and described supporting plate are connected to form hollow frame, and described coil, sleeve, iron core, back-moving spring and limited post are positioned at described hollow frame.
7. direct current relay according to claim 6, is characterized in that, described magnetic circuit assembly also comprises skeleton, and described coil is located in described hollow frame by described skeleton.
8. direct current relay according to claim 1, it is characterized in that, described dynamic assembly also comprises: jump ring, buffer spring, described jump ring is connected on described axle core, described buffer spring to be sheathed on described axle core and to be connected between described jump ring and described moving plate, and described axle core slides and is arranged in described moving plate.
9. direct current relay according to claim 8, is characterized in that, is provided with packing ring between described jump ring and described buffer spring.
10. direct current relay according to claim 8, is characterized in that, is provided with packing ring between described moving plate and described axle core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510357186.0A CN105006406A (en) | 2015-06-24 | 2015-06-24 | DC relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510357186.0A CN105006406A (en) | 2015-06-24 | 2015-06-24 | DC relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105006406A true CN105006406A (en) | 2015-10-28 |
Family
ID=54379037
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510357186.0A Pending CN105006406A (en) | 2015-06-24 | 2015-06-24 | DC relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105006406A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105472925A (en) * | 2015-12-01 | 2016-04-06 | 许继电源有限公司 | Hydrogen thyratron fixing seat and hydrogen thyratron device employing fixing seat |
| WO2017201824A1 (en) * | 2016-05-27 | 2017-11-30 | 浙江英洛华新能源科技有限公司 | Motor-type high-voltage direct current relay |
| CN111146044A (en) * | 2020-01-02 | 2020-05-12 | 上海沪工汽车电器有限公司 | Ceramic closed cavity structure of high-voltage relay, high-voltage relay and working method of high-voltage relay |
| CN112331523A (en) * | 2020-11-13 | 2021-02-05 | 娄底市安地亚斯电子陶瓷有限公司 | Ceramic relay for charging pile and preparation process |
| CN113838707A (en) * | 2021-09-01 | 2021-12-24 | 东风时代(武汉)电池系统有限公司 | Relay integrated with current acquisition function and power battery pack |
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| US20110032059A1 (en) * | 2008-03-19 | 2011-02-10 | Masahiro Ito | Contact device |
| CN101620951A (en) * | 2008-06-30 | 2010-01-06 | 欧姆龙株式会社 | Electromagnetic relay |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105472925A (en) * | 2015-12-01 | 2016-04-06 | 许继电源有限公司 | Hydrogen thyratron fixing seat and hydrogen thyratron device employing fixing seat |
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| CN111146044A (en) * | 2020-01-02 | 2020-05-12 | 上海沪工汽车电器有限公司 | Ceramic closed cavity structure of high-voltage relay, high-voltage relay and working method of high-voltage relay |
| CN111146044B (en) * | 2020-01-02 | 2021-09-07 | 上海沪工汽车电器有限公司 | Ceramic closed cavity structure of high-voltage relay, high-voltage relay and working method of high-voltage relay |
| CN112331523A (en) * | 2020-11-13 | 2021-02-05 | 娄底市安地亚斯电子陶瓷有限公司 | Ceramic relay for charging pile and preparation process |
| CN113838707A (en) * | 2021-09-01 | 2021-12-24 | 东风时代(武汉)电池系统有限公司 | Relay integrated with current acquisition function and power battery pack |
| CN113838707B (en) * | 2021-09-01 | 2024-04-05 | 东风时代(武汉)电池系统有限公司 | Relay integrated with current collection function and power battery pack |
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Application publication date: 20151028 |