CN216389202U - Electromagnetic relay, distribution box and battery pack - Google Patents

Abstract

The application relates to the technical field of batteries and discloses an electromagnetic relay, a power distribution box and a battery pack. The electromagnetic relay comprises a static contact, a first heat conducting piece and a second heat conducting piece, wherein the first heat conducting piece is in contact with the static contact and arranged around the static contact, the first heat conducting piece is an insulating piece, the second heat conducting piece is in contact with the first heat conducting piece, and the heat conductivity coefficient of the second heat conducting piece is greater than that of the first heat conducting piece. In the electromagnetic relay provided by the application, the heat of the static contact can be conducted to the second heat conducting member through the first heat conducting member, the heat dissipation area is increased through the second heat conducting member, and the heat dissipation effect is improved; and, the coefficient of heat conductivity of second heat-conducting piece is greater than the coefficient of heat conductivity of first heat-conducting piece, can effectively promote the radiating effect to the stationary contact, avoids the stationary contact intensification too high, influences the wholeness ability of relay. To sum up, the radiating mode of this application's electromagnetic relay can improve the radiating efficiency, guarantees the stable performance of relay.

Description

Electromagnetic relay, distribution box and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to an electromagnetic relay, a distribution box and a battery pack.

Background

The Relay (Relay) mainly has the functions of current carrying and switching in the new energy power battery system; when the relay passes through heavy current, can produce certain temperature rise, if the temperature rise is too high, the heat production is great, leads to resistance great, and the wholeness ability of relay can descend, influences the holistic quick performance of filling of battery package.

SUMMERY OF THE UTILITY MODEL

The utility model provides an electromagnetic relay, a distribution box and a battery pack, which are used for improving the heat dissipation mode of the relay.

In a first aspect, the present application provides an electromagnetic relay including a stationary contact, a first heat-conducting member, and a second heat-conducting member, the first heat-conducting member being in contact with and surrounding the stationary contact, the first heat-conducting member being an insulating member, the second heat-conducting member being in contact with the first heat-conducting member, and a thermal conductivity of the second heat-conducting member being greater than a thermal conductivity of the first heat-conducting member.

In the electromagnetic relay provided by the application, the first heat conducting member is in contact with the static contact and arranged around the static contact, so that a certain heat dissipation effect can be achieved; the second heat conducting member is in contact with the first heat conducting member, the heat of the static contact can be conducted to the second heat conducting member through the first heat conducting member, the heat dissipation area is increased through the second heat conducting member, and the heat dissipation effect is improved; and, the coefficient of heat conductivity of second heat-conducting piece is greater than the coefficient of heat conductivity of first heat-conducting piece, can effectively promote the radiating effect to the stationary contact, avoids the stationary contact intensification too high, influences the wholeness ability of relay. To sum up, the radiating mode of this application's electromagnetic relay can improve the radiating efficiency, guarantees the stable performance of relay.

In a second aspect, the present application provides a distribution box comprising a second insulating housing and an electromagnetic relay as described above, the electromagnetic relay being located within the second insulating housing.

In the distribution box that this application provided, electromagnetic relay's radiating effect is better, and the wholeness ability of relay is more stable, and consequently, this distribution box's electric property on-off control function stability is higher.

In a third aspect, the present application provides a battery pack, which includes a box body and the above-mentioned distribution box, wherein the distribution box is located in the box body, and the bottom of the second insulating shell of the distribution box is arranged on the bottom plate of the box body; the third heat-conducting member is in direct contact with the tank; or a heat-conducting medium is arranged between the third heat-conducting piece and the box body bottom plate, and the heat-conducting medium is a heat-conducting pad, heat-conducting glue or a heat-conducting coating.

In the battery package that this application provided, electromagnetic relay's radiating effect is better, and the wholeness ability of relay is more stable, can avoid the relay temperature rise too high to cause surrounding environment safety risk, improves the inside holistic security performance of battery package.

Drawings

For a better understanding of the utility model, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale, and some relevant components may be omitted in order to emphasize and clearly illustrate the technical features of the present disclosure. In addition, the relevant elements or components may be arranged differently as is known in the art.

Fig. 1 is a schematic partial structural diagram of an electromagnetic relay according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a partial structure of an electromagnetic relay according to another embodiment of the present invention;

fig. 3 is a schematic diagram of a partial structure of an electromagnetic relay according to another embodiment of the present invention;

fig. 4 is a schematic diagram of a partial structure of an electromagnetic relay according to another embodiment of the present invention;

fig. 5 is a schematic diagram of an overall structure of an electromagnetic relay according to an embodiment of the present invention;

fig. 6 is a schematic partial cross-sectional structure diagram of a battery pack and an electromagnetic relay therein according to an embodiment of the present invention;

fig. 7 is a schematic view of a partial structure of a battery pack according to an embodiment of the present invention.

Reference numerals:

1-an electromagnetic relay; 11-stationary contact; 12-moving contact; 13-an iron core; 14-a coil;

15-a first thermally conductive member; 16-a second thermally conductive member; 17-a third thermally conductive member;

18-a first housing; 19-a second housing; 190-a mounting portion; 10-a first insulating housing;

2-a second insulating housing; 3, a box body; 31-a base plate; 4-heat conducting medium.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In a first aspect, as shown in fig. 1, 2, 3, and 4, the present application provides an electromagnetic relay including a stationary contact 11, a first heat-conducting member 15, and a second heat-conducting member 16, wherein the first heat-conducting member 15 is in contact with the stationary contact 11 and disposed around the stationary contact 11, and the first heat-conducting member 15 is an insulating member; the second heat-conducting member 16 is in contact with the first heat-conducting member 15, and the heat conductivity of the second heat-conducting member 16 is greater than that of the first heat-conducting member 15.

In the electromagnetic relay provided by the application, the first heat-conducting member 15 is in contact with the fixed contact 11 and arranged around the fixed contact 11, so that a certain heat dissipation effect can be achieved; the second heat conducting member 16 is in contact with the first heat conducting member 15, the heat of the stationary contact 11 can be conducted to the second heat conducting member 16 through the first heat conducting member 15, and the heat dissipation area is increased through the second heat conducting member 16, so that the heat dissipation effect is improved; moreover, the heat conductivity coefficient of the second heat conducting member 16 is greater than that of the first heat conducting member 15, so that the heat dissipation effect on the stationary contact 11 can be effectively improved, and the problem that the temperature of the stationary contact 11 is too high to influence the overall performance of the relay is avoided. To sum up, the radiating mode of this application's electromagnetic relay can improve the radiating efficiency, guarantees the stable performance of relay.

In some embodiments, as shown in fig. 2 and 3, the present application provides an electromagnetic relay further including a movable contact 12, and a core 13 and a coil 14 for driving the movable contact 12 to move.

Specifically, the electromagnetic force generated by the iron core 13 and the coil 14 can drive the moving contact 12 to move, so that the moving contact 12 is contacted with or disconnected from the fixed contact 11, thereby realizing the electromagnetic switching action. For example, when the coil 14 is energized, the iron core 13 is magnetized to generate a sufficient electromagnetic force to attract the armature and move the spring, so as to close or separate the movable contact 12 and the stationary contact 11, i.e., the originally closed contact is opened and the originally opened contact is closed. When the relay is used as a control switch for charging and discharging of the battery pack, the output bus bar of the battery pack is connected with the fixed contact 11 of the relay, and the switch control of the input or output of the total current of the battery pack can be realized by controlling the closing or opening of the movable contact 12 and the fixed contact 11 of the relay. Specifically, the output bus bar of the battery pack is generally a copper bar.

Illustratively, the first heat-conducting member 15 encloses a vacuum chamber for arc extinction and insulation, the vacuum chamber being filled with an inert gas to be isolated from air, and the movable contact 12 of the relay being disposed within the vacuum chamber.

Illustratively, as shown in fig. 1, 3 and 4, the second heat-conducting member 16 surrounds the core 13 and the coil 14; in this way, the second heat-conducting member 16 can not only dissipate heat from the stationary contact 11, but also diffuse heat from the core 13 and the coil 14 in time.

Specifically, after the coil 14 is electrified, the movable contact 12 and the fixed contact 11 are attracted, and the electromagnetic relay realizes the switch conduction; the electric current that the battery package charge-discharge produced can produce a large amount of heats when rolling out busbar and stationary contact 11, and this heat can be conducted to first heat-conducting piece 15 and second heat-conducting piece 16 on through stationary contact 11 to by distribute away fast, thereby can avoid producing the influence to electromagnetic relay's performance.

In some embodiments, as shown in FIG. 1, the second thermal conduction member 16 is fixed to the first thermal conduction member 15 by welding and/or bonding.

For example, the first heat-conducting member 15 may be ceramic, and the second heat-conducting member 16 may be a metal sheet.

Illustratively, the first heat-conducting member 15 and the second heat-conducting member 16 are brazed.

In some embodiments, as shown in fig. 5 and 6, the electromagnetic relay further includes a first insulating housing 10, and the first insulating housing 10 is used for insulating and protecting the electromagnetic relay.

Illustratively, the first insulating housing 10 includes a first housing 18 and a second housing 19 that are snap-fit connected, the first housing 18 is disposed outside the first heat conducting member 15, the second housing 19 is disposed outside the second heat conducting member 16, and a mounting portion 190 is disposed on the second housing 19, the mounting portion 190 is configured to be fixedly mounted on an external structure. The second housing 19 can be fixed to another structure by the mounting portion 190, thereby fixing the entire electromagnetic relay to another structure. At this time, the second heat-conducting member 16, the iron core 13, the coil 14 and the movable contact 12 are relatively close to the bottom fixing position, the stationary contact 11 is relatively far away from the bottom fixing position, the whole electromagnetic relay is vertically arranged, and compared with the relay arranged in an inverted or horizontal manner, the occupied area can be reduced, the space utilization rate can be improved, and the stationary contact 11 is conveniently connected with a roll-out busbar.

In addition, adopt this kind of relay that sets up upright, and the busbar is through setting up the stationary contact connection on relay upper portion for the relay can be installed inside the battery package steadily, has improved the overall structure stability of relay, avoids because the relay takes place to rock, influences the accuracy that the relay was gathered to battery package internal voltage.

Specifically, the mounting portion 190 is provided with a mounting hole, and the mounting portion 190 may be fixedly mounted to the external structure by a bolt penetrating through the mounting hole.

Illustratively, the first insulating housing 10 is made of plastic, so that the weight is light, the insulating property is good, and the first housing 18 and the second housing 19 can be conveniently connected by a snap fit.

In some embodiments, as shown in fig. 4, 5 and 6, the electromagnetic relay further includes a third heat conduction member 17, and the third heat conduction member 17 at least partially protrudes out of the first insulating housing 10, that is, the third heat conduction member 17 is partially exposed outside the first insulating housing 10 of the power distribution box, so that heat in the first insulating housing 10 of the electromagnetic relay can be conducted to the outside and dissipated through the third heat conduction member 17, thereby improving the heat dissipation effect of the electromagnetic relay.

Illustratively, the third heat-conducting member 17 extends at least partially out of the second housing 19, for example, the third heat-conducting member 17 is located on a side of the second heat-conducting member 16 away from the first heat-conducting member 15, and is specifically disposed on the second housing 19; the second casing 19 is provided with an opening, and the third heat-conducting member 17 is disposed at the opening of the second casing 19, partially inside the second casing 19, and partially extending out of the second casing 19.

Illustratively, the third heat-conducting member 17 is disposed under the coil 14 and in direct contact with the coil 14, so that heat from the coil 14 can be directly conducted to the outside of the housing and dissipated.

For example, the third heat conduction member 17 may be a metal heat conduction sheet, and the shape of the heat conduction sheet may be circular, but is not limited to circular, and may also be other shapes such as rectangular; the second housing 19 of the electromagnetic relay is integrated with the third heat-conducting member 17 by injection molding.

Illustratively, the third thermal conduction member 17 is directly connected to the second thermal conduction member 16, or may be connected thereto by a thermal conductive adhesive. Thus, the heat of the electromagnetic relay can be conducted to the third heat-conducting member 17 through the first heat-conducting member 15 and the second heat-conducting member 16, and conducted to the outside of the electromagnetic relay by the third heat-conducting member 17.

In a second aspect, as shown in fig. 6 and 7, the present application also provides a distribution box comprising a second insulating housing 2 and an electromagnetic relay 1 as in any one of the above, the electromagnetic relay 1 being located within the second insulating housing 2.

Illustratively, the second housing 19 of the electromagnetic relay 1 is fixedly mounted on the second insulating housing 2 of the distribution box.

In some embodiments, as shown in fig. 6, the electromagnetic relay 1 includes a third heat-conducting member 17, the bottom of the second insulating housing 2 of the distribution box is provided with an opening, and the third heat-conducting member 17 is at least partially located at the opening of the bottom of the second insulating housing 2.

The third heat-conducting piece 17 at least partially extends out of the first insulating shell 10 and is positioned at the bottom opening of the second insulating shell 2, so as to conduct heat to the outside of the distribution box; for example, when the distribution box is installed in a battery pack, the third heat conduction member 17 is partially exposed outside the casing of the distribution box, facilitating heat conduction to the heat dissipation structure of the battery pack, for example, to the heat exchange plate at the bottom of the battery pack case 3.

In a third aspect, as shown in fig. 6 and 7, the present application further provides a battery pack including a case 3 and the power distribution box as described above.

Illustratively, the distribution box is positioned in the box body 3, and the bottom of the second insulating shell 2 of the distribution box is arranged on the bottom plate 31 of the box body 3; the third heat conducting member 17 partially extends out of the first insulating housing 10 and is accommodated in the opening at the bottom of the second insulating housing 2 and is close to the bottom plate 31 of the box body 3, specifically, the third heat conducting member 17 can directly contact with the bottom plate 31 of the box body 3 to transfer heat to the bottom plate 31 of the box body 3; or a heat conducting medium 4, such as a heat conducting pad, a heat conducting glue or a heat conducting coating, is arranged between the third heat conducting member 17 and the bottom plate 31 of the box 3, and the third heat conducting member 17 transfers heat to the bottom plate 31 of the box 3 through the heat conducting medium 4. In this way, the heat of the electromagnetic relay 1 can be transferred to the bottom plate 31 of the battery pack case 3 through the third heat conductive member 17, thereby achieving rapid heat dissipation.

Specifically, the bottom plate 31 of the battery pack case 3 includes a heat dissipation plate, which contributes to an improvement in heat dissipation efficiency.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This disclosure is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and example embodiments be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims. It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (11)

1. An electromagnetic relay comprising a stationary contact, a first heat-conducting member and a second heat-conducting member, wherein the first heat-conducting member is in contact with the stationary contact and arranged around the stationary contact, the first heat-conducting member is an insulating member, the second heat-conducting member is in contact with the first heat-conducting member, and a heat conductivity of the second heat-conducting member is greater than a heat conductivity of the first heat-conducting member.

2. The electromagnetic relay according to claim 1, further comprising a movable contact, and a core and a coil for driving the movable contact to move; the second heat-conducting member surrounds the core and the coil.

3. The electromagnetic relay according to claim 2, wherein the second heat-conducting member is fixed to the first heat-conducting member by welding and/or bonding.

4. The electromagnetic relay of claim 1, wherein the first thermally conductive member is ceramic and the second thermally conductive member is a metal sheet.

5. The electromagnetic relay of claim 4, wherein the first thermally conductive member and the second thermally conductive member are brazed.

6. The electromagnetic relay of any of claims 1-5, further comprising a first insulative housing and a third thermally conductive member, the third thermally conductive member extending at least partially out of the first insulative housing.

7. The electromagnetic relay according to claim 6, wherein the first insulating housing comprises a first housing and a second housing that are snap-fit together, the first housing is disposed outside the first heat-conducting member, the second housing is disposed outside the second heat-conducting member, and the second housing is provided with a mounting portion for fixed mounting to an external structure.

8. The electromagnetic relay of claim 6, wherein the third thermally conductive member is directly connected to the second thermally conductive member or is connected thereto by a thermally conductive adhesive.

9. A distribution box comprising a second insulating housing and an electromagnetic relay according to any one of claims 1 to 8, the electromagnetic relay being located within the second insulating housing.

10. The distribution box of claim 9, wherein the electromagnetic relay comprises a third thermally conductive member, wherein the bottom of the second insulative housing is provided with an opening, and wherein the third thermally conductive member is at least partially positioned at the opening at the bottom of the second insulative housing.

11. A battery pack comprising a case and the distribution box of claim 10, wherein the distribution box is located in the case and the bottom of the second insulating housing of the distribution box is disposed on the bottom plate of the case; the third heat-conducting member is in direct contact with the tank; or a heat-conducting medium is arranged between the third heat-conducting piece and the box body bottom plate, and the heat-conducting medium is a heat-conducting pad, heat-conducting glue or a heat-conducting coating.

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