CN116215238A

CN116215238A - Abnormal sound control structure of relay

Info

Publication number: CN116215238A
Application number: CN202310124710.4A
Authority: CN
Inventors: 王朝辉; 陈果
Original assignee: Anhui Xingchuan New Energy Battery Technology Co ltd
Current assignee: Anhui Xingchuan New Energy Battery Technology Co ltd
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2023-06-06

Abstract

The invention discloses a relay abnormal sound control structure which comprises a relay, a bus, a high-voltage battery pack and an external load, wherein connecting terminals are correspondingly arranged on the relay, the high-voltage battery pack and the external load; the two corresponding connecting terminals are connected through buses, and the middle sections of the two buses are provided with bending parts; the two bending parts are used for reducing the bus area at the connecting terminal so as to reduce abnormal sound pressure; the shapes of the two bending parts are matched with the shapes of the corresponding relay, the high-voltage battery pack, the frame body of the external load and the actual installation position. The invention has novel design and reasonable structure, reduces the vibration area of the bus at the connecting terminal through the design of the bending parts on the buses at the two sides of the relay, effectively controls abnormal sound of the relay, improves the abnormal sound source to a certain extent compared with the mode of coating the sound absorbing material, and has simple method and low cost.

Description

Abnormal sound control structure of relay

Technical Field

The invention relates to the technical field of relay devices, in particular to a relay abnormal sound control structure.

Background

The electric automobile is an important development direction of a new energy automobile, and the electric automobile drives the automobile by using the cooperation of an EV/HEV high-voltage battery pack and an inverter, wherein the EV/HEV high-voltage battery pack and the inverter are connected through a relay, and the relay generally uses a magnet coil to provide magnetic force for a movable contact plunger to enable the movable contact to be communicated with a fixed contact.

When the vehicle accelerates, the inverter discharges from the high-voltage battery and accelerates by using the energy; conversely, when the vehicle is decelerating, the inverter charges the battery with the deceleration energy.

Under normal conditions, the inverter charges and discharges the high-voltage battery pack by stable non-pulse current, but under the condition of sudden acceleration and deceleration, the control device cannot keep up, the battery can charge and discharge by pulse current instead of stable non-pulse current in a short time, when the pulse current passes through the relay, based on the fleming's left hand law, the current-carrying plate in the relay vibrates according to the frequency of the pulse current by magnetic force, the vibration is transmitted to the bus connected with the connecting terminal outwards, and the bus is driven to vibrate to sound audible to human ears, namely abnormal sound of the inverter.

The existing abnormal sound solving mode generally uses sound absorbing materials to wrap the high-voltage battery pack, the method is high in material price, difficult in pasting position and high in use cost, when the existing relay is connected with the high-voltage battery pack or the inverter, the shortest distance is generally adopted to connect the high-voltage battery pack or the inverter in a straight line mode, and therefore the bus vibration area is large when abnormal sound occurs, and abnormal sound pressure is large and difficult to inhibit.

Disclosure of Invention

The invention aims to solve the defects that in the prior art, a sound absorbing material is generally used for wrapping a high-voltage battery pack to inhibit abnormal sound pressure, the material price is high, the pasting position is difficult, the use cost is high, the bus vibration area is large when abnormal sound occurs, the abnormal sound pressure is large and the abnormal sound is difficult to inhibit in the existing connection mode, and provides a relay abnormal sound control structure.

In order to achieve the above purpose, the present invention adopts the following technical scheme:

the relay abnormal sound control structure comprises a relay, a bus, a high-voltage battery pack and an external load, wherein corresponding connecting terminals are arranged on the relay, the high-voltage battery pack and the external load;

the two corresponding connecting terminals are connected through buses, and the middle sections of the two buses are provided with bending parts.

Preferably, the two bending parts are used for reducing the bus area at the connecting terminal so as to reduce abnormal sound pressure.

Preferably, the shapes of the two bending parts are matched with the shapes of the corresponding relay, the high-voltage battery pack, the frame body of the external load and the actual installation position.

Preferably, the buses at the two bending parts are bent downwards along the corresponding relays, the high-voltage battery pack and the frame body of the external load and are close to each other.

Preferably, both of the bent portions extend to the vicinity of the bottom of the relay.

Compared with the prior art, the invention has the beneficial effects that:

1. in the invention, abnormal sound is reduced by designing the bending part for the bus, and the abnormal sound of the relay is controlled, so that compared with the traditional mode of coating the sound absorbing material for the high-voltage battery, the operation is simpler, and the cost is effectively reduced;

2. according to the invention, through the design of bending the bus, the linear area of the bus at the connecting terminal is reduced, and when the vibration of the pole plate in the relay is transmitted to the bus through the connecting terminal, the area of the bus vibrating air is reduced due to the reduction of the area of the bus at the connecting terminal, so that the sound pressure when abnormal sound occurs is reduced;

3. according to the invention, through the design of the bending part, the bending part extends to the bottom along the relay frame body, so that the transmission of the vibration of the bus at the connecting terminal to the lower end of the bending part is effectively reduced, abnormal sound is further controlled, and the overall sound pressure is reduced.

The invention has novel design and reasonable structure, reduces the vibration area of the bus at the connecting terminal through the design of the bending part on the bus, effectively controls abnormal sound of the relay, improves the abnormal sound source to a certain extent compared with the mode of coating the sound absorbing material, and has simple method and low cost.

Drawings

Fig. 1 is a schematic diagram of a conventional structure in which relays are connected in a straight line through bus bars;

FIG. 2 is a schematic view of a bus connection structure using a bending portion according to the present invention;

FIG. 3 is a schematic diagram of a bus connection structure at a relay of the present invention;

FIG. 4 is a graph showing abnormal sound pressure data of a conventional linear connection mode;

fig. 5 is abnormal sound experimental sound pressure data of the improved bending connection mode of the present invention.

In the figure: relay 1, bus bar 2, connection terminal 21, bent portion 22, high-voltage battery 3, load 4, vibration direction a, sound pressure b.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.

In the description of the present invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Example 1

Referring to fig. 1-5, the relay abnormal sound control structure comprises a relay 1, a bus 2, a high-voltage battery pack 3 and an external load 4, wherein corresponding connecting terminals 21 are respectively arranged on the relay 1, the high-voltage battery pack 3 and the external load 4.

The two corresponding connecting terminals 21 are connected through a bus 2, the relay 1 is connected with the high-voltage battery pack 3 and the relay 1 is connected with an external load 4, wherein the high-voltage battery pack 3 is an EV/HEV high-voltage battery, the external load 4 is an inverter, the middle sections of the two bus 2 are respectively provided with a bending part 22, and the bending parts 22 are used for reducing the area of the bus 2 at the connecting terminal 21 so as to reduce abnormal sound pressure.

Through bending the bus bar 2, when the vibration of the current carrying plate in the relay 1 is transferred to the bus bar 2, the area of air vibration is reduced due to the shortening of the vibration distance of the bus bar 2 at the connecting terminal 21, compared with the traditional straight line connecting mode (see fig. 1), the bending of the bus bar 2 (see fig. 2 and 3) can effectively reduce the sound pressure by 10-25 db, and experimental data are shown in fig. 4 and 5.

In fig. 3 of the accompanying drawings, the vibration direction a represents the vibration direction of the bus bar 2, the sound pressure b represents the sound pressure emitted by the vibration of the bus bar 2, and the magnitudes of the vibration direction a and the sound pressure b are used for illustrating the magnitudes of the vibration and the sound pressure.

In the invention, the experiment is carried out by adopting a traditional straight line connection mode in fig. 4, the experiment is carried out by adopting the improved bending mode in fig. 5, when the emergency control adjustment is carried out in the rapid acceleration and deceleration process of the high-voltage battery pack 3 through the experiment simulation external load 4, the pulse current generated in the initial stage of the control switching when the high-voltage battery pack 3 discharges or recovers energy flows through the relay 1, the relay 1 drives the bus 2 to vibrate to generate abnormal sound, the two connection modes are respectively tested and the sound pressure is recorded, the comparison test of one time is recorded in fig. 4 and 5, the maximum sound pressure in the abnormal sound is obviously reduced, and the fact that the abnormal sound control of the relay 1 is obviously observed by the added bending part 22 in the invention is obvious is shown, compared with the traditional sound absorbing material, the coating effect of the high-voltage battery pack 3 is similar, but the problem that the sound absorbing material is inconvenient to coat and the cost is higher is remarkably improved.

Example two

Referring to fig. 2 and 3, in this embodiment, the shape of the two bending parts 22 is substantially the same as that of the first embodiment, and more preferably, the shapes of the two bending parts 22 are matched with the shapes of the relay 1, the frame bodies of the high-voltage battery pack 3 and the external load 4, and the actual installation positions, so that the bending parts 22 adapt to the shapes of the relay 1, the high-voltage battery pack 3 and the external load 4, and the use of the bending parts 22 is convenient, wherein the relay 1 is generally arranged in the high-voltage battery pack 3, and the installation of the relay 1 can also be convenient by matching with the actual installation positions.

In order to reduce the area of the bus bar 2 at the connection terminal 21, in this embodiment, as shown in fig. 2 and 3, the bus bars 2 at the two bending portions 22 are both bent downward along the frame bodies of the relay 1, the high-voltage battery pack 3 and the external load 4 and are close to each other, so that the area of the bus bar 2 at the connection terminal 21 is ensured to be smaller, the overall sound pressure is further reduced, meanwhile, the vibration transmission from the bus bar 2 to the bending portions 22 is also reduced, and the control effect on abnormal noise is ensured.

In this embodiment, as shown in fig. 2 and 3, both the bent portions 22 extend to the vicinity of the bottom of the relay 1, further improving the vibration suppressing effect on the bus bar 2, and reducing the transmission of vibration of the bus bar 2 to the bottom of the bent portion 22.

The foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.

Claims

1. The relay abnormal sound control structure comprises a relay (1), a bus (2), a high-voltage battery pack (3) and an external load (4), and is characterized in that connecting terminals (21) are correspondingly arranged on the relay (1), the high-voltage battery pack (3) and the external load (4);

the two corresponding connecting terminals (21) are connected through the bus bars (2), and the middle sections of the two bus bars (2) are provided with bending parts (22).

2. The relay abnormal sound control structure according to claim 1, wherein two of the bent portions (22) are used to reduce the area of the bus bar (2) at the connection terminal (21) to reduce abnormal sound pressure.

3. The relay abnormal sound control structure according to claim 1, wherein the shapes of the two bending parts (22) are matched with the shapes of the corresponding relay (1), the high-voltage battery pack (3), the frame of the external load (4) and the actual mounting position.

4. The relay abnormal sound control structure according to claim 1, wherein the bus bars (2) at the two bending parts (22) are bent downwards along the corresponding frames of the relay (1), the high-voltage battery pack (3) and the external load (4) and are close to each other.

5. Relay abnormal sound control structure according to claim 1, characterized in that both of the bent portions (22) extend to the vicinity of the bottom of the relay (1).