A direct current contactor for new energy vehicles

Abstract

The application provides a new energy automobile direct current contactor, and relates to the technical field of direct current contactors.The direct current contactor is provided with a locking auxiliary block at the rear side mounting plate part of the direct current contactor.The application converts the slight loosening and thread stripping of the bolt into the obvious displacement of the locking auxiliary block, automatically amplifies the loosening gap through the elastic force of the spring connecting piece a, cooperates with the plug-in column, the pressing plate and the loosening warning switch, accurately captures the slight loosening, and transmits the loosening signal to the central control console loosening warning lamp through the controller in the form of lighting / flashing to timely remind the driver, solves the problem that the direct current contactor of the new energy automobile is directly fastened and installed through the bolt, the bolt is prone to loosening and thread stripping under the complex working conditions of the vehicle, the slight loosening is difficult to be detected through the conventional means, the hidden danger is hidden, and the safety accidents such as high-pressure contact failure and fire are prone to occur.

Description

Technical Field

[0001] This invention relates to the field of DC contactor technology, and more particularly to a DC contactor for new energy vehicles. Background Technology

[0002] DC contactors are commonly used as the core component for switching control in the high-voltage circuits of new energy vehicles. Their installation stability directly affects the safety and operational stability of the vehicle's high-voltage system. Currently, most mainstream DC contactors are mounted to the vehicle body or bracket via bolts directly fastened to the rear mounting plate. Under conditions such as long-term vehicle vibration, high and low temperature cycling, and high-voltage current surges, problems such as loosening and stripping of the mounting bolts are highly likely to occur. Furthermore, there is currently no active monitoring or warning function for early-stage minor bolt loosening. The displacement of slightly loose bolts is extremely small, making it difficult to detect with conventional visual inspection and testing methods. This leads to highly concealed hazards, making maintenance and troubleshooting difficult. Drivers cannot detect these issues in time, and they can easily develop into serious loosening, causing safety hazards such as poor high-voltage contact, sparking, power outages, or even short circuits and fires. Summary of the Invention

[0003] This invention relates to a DC contactor for new energy vehicles, which solves the problem that DC contactors for new energy vehicles are directly fastened with bolts, which are prone to loosening and unraveling under complex vehicle operating conditions. Furthermore, minor loosening is difficult to detect by conventional methods, resulting in hidden dangers and potential safety accidents such as poor high-voltage contact and fires.

[0004] This invention provides a DC contactor for new energy vehicles, specifically comprising: a DC contactor, wherein a locking auxiliary block is provided on the rear mounting plate of the DC contactor, the front end face of the locking auxiliary block has two symmetrically arranged storage slots, and a limiting post is fixedly installed at the axial center of each of the two storage slots, the length of the limiting post being greater than the depth of the storage slot; the rear mounting plate of the DC contactor has two symmetrically arranged limiting holes, the two limiting holes being slidably inserted into the two limiting posts respectively; a spring connector a is sleeved around each of the two limiting posts, the front end of the spring connector a is fixedly connected to the rear mounting plate of the DC contactor, and the rear end of the spring connector a is fixedly connected to the inner end face of the storage slot; in its natural state, the front end face of the locking auxiliary block does not contact the rear mounting plate of the DC contactor; the front end face of the locking auxiliary block has a locking engagement hole that penetrates its rear end face at the mounting hole position on the rear mounting plate of the DC contactor.

[0005] Furthermore, the rear end face of the locking auxiliary block is provided with a mounting groove, and the inner end face of the mounting groove is provided with a plug-in hole that penetrates the front end face of the locking auxiliary block; a plug-in post is inserted into the plug-in hole, and a pressure plate is fixedly installed on the rear end face of the plug-in post. The front end face of the pressure plate is fixedly connected to the inner end face of the mounting groove by a spring connector b.

[0006] Furthermore, in its natural state, the front end of the spring connector b passes through the front opening of the plug hole and contacts the rear mounting plate of the DC contactor.

[0007] Furthermore, a monitoring on / off switch and a loosening warning switch are installed inside the mounting slot; in the natural state, the front end of the pressure plate of the spring connector b presses against the button end of the loosening warning switch, at which time the loosening warning switch is in the pressed-on state.

[0008] Furthermore, the locking auxiliary block is equipped with a controller, which is electrically connected to the monitoring on / off switch and the loosening warning switch; it also includes a loosening warning light, which is electrically connected to the controller and is installed on the center console of the new energy vehicle; when the loosening warning switch is in the pressed start state, the loosening warning switch feeds a feedback signal to the controller, and the controller controls the loosening warning light to start.

[0009] This invention provides a DC contactor for new energy vehicles, which has the following advantages:

[0010] This invention transforms minor bolt loosening and unscrewing into a noticeable forward and backward displacement of the locking auxiliary block. The elasticity of the spring connector a automatically amplifies the loosening gap. In conjunction with the plug-in post, pressure plate, and loosening warning switch, it accurately detects extremely slight loosening. The loosening signal is transmitted to the loosening warning light on the center console via the controller, which immediately alerts the driver by illuminating or flashing the light. This prevents safety hazards such as poor contact, sparking, and power failure caused by loose contactor installation, and ensures the stable operation of the high-voltage circuit of new energy vehicles.

[0011] When the bolts of this invention are tightened, the structure adaptively compresses and triggers the switch to close; when the bolts are loose, the spring automatically resets and triggers an alarm; after maintenance and tightening, the system automatically resumes normal monitoring without manual reset, making it convenient to use and highly reliable. The invention is an add-on structure design, requiring no modification to the DC contactor body or vehicle mounting bracket, making it suitable for mainstream new energy vehicle DC contactor installation scenarios, with strong versatility and low modification costs. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0013] The accompanying drawings described below are only related to some embodiments of the invention and are not intended to limit the invention.

[0014] In the attached diagram:

[0015] Figure 1 A schematic diagram of the front isometric structure of the present invention is shown;

[0016] Figure 2 A schematic diagram of the rear isometric structure of the present invention is shown;

[0017] Figure 3 A schematic diagram of the rear isometric structure in the split state of the present invention is shown;

[0018] Figure 4 A schematic diagram of the front isometric structure of the present invention in its split state is shown;

[0019] Figure 5 This diagram shows a partial enlarged cross-sectional view of the mounting groove portion of the present invention;

[0020] Figure 6 This diagram shows a partial enlarged cross-sectional view of the storage slot portion of the present invention;

[0021] Figure 7 A system composition block diagram of the present invention is shown;

[0022] List of reference numerals

[0023] 1. DC contactor; 101. Limit socket; 102. Spring connector a; 2. Locking auxiliary block; 201. Loose warning light; 202. Limit post; 203. Locking mating hole; 204. Mounting slot; 205. Monitoring on / off switch; 206. Loose warning switch; 207. Plug-in hole; 208. Storage slot; 2010. Controller; 3. Pressure plate; 301. Plug-in post; 302. Spring connector b. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example: Please refer to Figures 1 to 7 :

[0026] This invention proposes a DC contactor for new energy vehicles, comprising: a DC contactor 1; a locking auxiliary block 2 provided on the rear mounting plate of the DC contactor 1; the front end face of the locking auxiliary block 2 having two symmetrically arranged receiving slots 208; a limiting post 202 fixedly installed at the axial center of each of the two receiving slots 208; the length of the limiting post 202 being greater than the depth of the receiving slot 208; the rear mounting plate of the DC contactor 1 having two symmetrically arranged limiting holes 101; the two limiting holes 101 respectively slidingly engaging with the two limiting posts 202; the locking auxiliary block 2, through the two front limiting posts 202, connects with the rear end of the DC contactor 1. The limiting insertion holes 101 on the side mounting plate slide and engage, achieving precise positioning in the left-right and up-down directions, and can only slide in the front-back direction; a spring connector a102 is sleeved around each of the two limiting insertion posts 202. The front end of the spring connector a102 is fixedly connected to the rear mounting plate of the DC contactor 1, and the rear end of the spring connector a102 is fixedly connected to the inner end face of the storage groove 208; in the natural state, the front end face of the locking auxiliary block 2 does not contact the rear mounting plate of the DC contactor 1; the front end face of the locking auxiliary block 2 has a locking engagement hole 203 that penetrates its rear end face at the mounting hole position on the rear mounting plate of the DC contactor 1.

[0027] The locking auxiliary block 2 has a mounting groove 204 on its rear end face, and a insertion hole 207 through the front end face of the locking auxiliary block 2 is provided on the inner end face of the mounting groove 204. A insertion post 301 is inserted into the insertion hole 207, and a pressure plate 3 is fixedly installed on the rear end face of the insertion post 301. The front end face of the pressure plate 3 is fixedly connected to the inner end face of the mounting groove 204 by a spring connector b302. In its natural state, the front end of the insertion post 301 passes through the front opening end of the insertion hole 207 and contacts the rear mounting plate of the DC contactor 1.

[0028] The mounting slot 204 houses a monitoring on / off switch 205 and a loosening warning switch 206. In its natural state, the spring connector b302 presses against the button of the loosening warning switch 206, putting the switch in a pressed-on state. The locking auxiliary block 2 contains a controller 2010, which is electrically connected to the monitoring on / off switch 205 and the loosening warning switch 206. It also includes a loosening warning light 201, which is electrically connected to the controller 2010 and installed on the center console of the new energy vehicle. When the loosening warning switch 206 is in the pressed-on state, it sends a feedback signal to the controller 2010, which then activates the loosening warning light 201.

[0029] The working principle of this embodiment:

[0030] The mounting bolts first pass through the mounting holes of the DC contactor 1 mounting plate, then pass backward through the locking engagement hole 203 of the locking auxiliary block 2, and are tightened by engaging with the threaded holes of the vehicle body / bracket.

[0031] During the tightening process, the bolt head simultaneously presses against the locking auxiliary block 2, overcoming the elastic force of the spring connector a102, until the front end of the locking auxiliary block 2 is tightly fitted with the mounting plate of the DC contactor 1, thus completing the secure locking.

[0032] When the bolts are tightened and the locking auxiliary block 2 is tightly fitted with the mounting plate, the plug-in post 301 drives the pressure plate 3 and the spring connector b302 to move backward. The spring connector b302 is in a stretched state, the pressure plate 3 is separated from the loose warning switch 206, and the loose warning switch 206 is in a closed state that is not pressed.

[0033] When the bolts become loose or the threads come loose, the spring connector a102 will automatically push and lock the auxiliary block 2, turning the slight looseness into a significant displacement. The plug post 301 loses the pressure from the mounting plate, the spring connector b302 resets, and drives the pressure plate 3 and the plug post 301 to move forward. At this time, the pressure plate 3 presses the looseness warning switch 206 button, and the looseness warning switch 206 is triggered.

[0034] When the looseness warning switch 206 is pressed and triggered, it outputs a looseness detection electrical signal to the controller 2010. After receiving the looseness signal, the controller 2010 immediately drives the looseness warning light 201 installed on the vehicle's center console to light up / flash, reminding the driver immediately that the DC contactor 1 is loose and needs to be repaired.

[0035] After subsequent maintenance is completed and the bolts are tightened again, the locking auxiliary block 2 moves forward again to press against the plug-in column 301. The pressure plate 3 releases the loosening warning switch 206, the signal is interrupted, the loosening warning light 201 automatically goes out, and the system returns to normal monitoring status.

Claims

1. A DC contactor for new energy vehicles, characterized in that, include: A DC contactor (1) has a locking auxiliary block (2) on its rear mounting plate. The front end of the locking auxiliary block (2) has two symmetrically arranged storage slots (208). A limiting pin (202) is fixedly installed at the axial center of each storage slot (208). The length of the limiting pin (202) is greater than the depth of the storage slot (208). The rear mounting plate of the DC contactor (1) has two symmetrically arranged limiting holes (101). The two limiting holes (101) are slidably inserted into the two limiting pins (202). A spring connector a (102) is sleeved around each of the limiting plugs (202). The front end of the spring connector a (102) is fixedly connected to the rear mounting plate of the DC contactor (1), and the rear end of the spring connector a (102) is fixedly connected to the inner end face of the storage groove (208). In its natural state, the front end face of the locking auxiliary block (2) does not contact the rear mounting plate of the DC contactor (1). The front end face of the locking auxiliary block (2) is provided with a locking engagement hole (203) that penetrates its rear end face, corresponding to the mounting hole position on the rear mounting plate of the DC contactor (1).

2. The DC contactor for new energy vehicles according to claim 1, characterized in that, The locking auxiliary block (2) has a mounting groove (204) on its rear end face, and a insertion hole (207) through the front end face of the locking auxiliary block (2) is provided on the inner end face of the mounting groove (204); a plug-in post (301) is inserted into the insertion hole (207), and a pressure plate (3) is fixedly installed on the rear end face of the plug-in post (301). The front end face of the pressure plate (3) and the inner end face of the mounting groove (204) are fixedly connected by a spring connector b (302).

3. A DC contactor for new energy vehicles according to claim 2, characterized in that, In its natural state, the front end of the spring connector b (302) passes through the front opening of the plug-in hole (207) and contacts the rear mounting plate of the DC contactor (1).

4. A DC contactor for new energy vehicles according to claim 3, characterized in that, The mounting slot (204) is equipped with a monitoring on / off switch (205) and a loosening warning switch (206); in the natural state of the spring connector b (302), the front end of the pressure plate (3) presses against the button end of the loosening warning switch (206), at which time the loosening warning switch (206) is in the pressed start state.

5. A DC contactor for new energy vehicles according to claim 4, characterized in that, The locking auxiliary block (2) is equipped with a controller (2010) inside. The controller (2010) is electrically connected to the monitoring on / off switch (205) and the loosening warning switch (206). It also includes a loosening warning light (201), which is electrically connected to the controller (2010). The loosening warning light (201) is installed on the center console of the new energy vehicle. When the loosening warning switch (206) is in the pressed start state, the loosening warning switch (206) sends a feedback signal to the controller (2010), and the controller (2010) controls the loosening warning light (201) to start.

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