US-12620648-B2 - High voltage box, battery and electric device

Abstract

A high voltage box includes a housing and a relay. The housing includes an upper housing and a lower housing connected to each other to form an accommodating space. The relay is provided in the accommodating space and includes a conducting strip in contact with the lower housing.

Inventors

• Juanxia LV

Assignees

• CONTEMPORARY AMPEREX TECHNOLOGY CO., LIMITED

Dates

Publication Date

20260505

Application Date

20230412

Priority Date

20211122

Claims (18)

1. 1 . A high voltage box, comprising: a housing, comprising an upper housing and a lower housing, the upper housing and the lower housing being connected to each other to form an accommodating space; a relay, provided in the accommodating space, the relay comprising a conducting strip leading out a circuit inside the relay and connected with outside, and the conducting strip being in contact with the lower housing; and at least one heat conduction metal block, wherein the at least one heat conduction metal block is provided in the accommodating space, and the at least one heat conduction metal block is connected to and in contact with both the conducting strip and the lower housing.
2. 2 . The high voltage box according to claim 1 , further comprising: a water cooling plate, wherein the water cooling plate is in contact with one side of the lower housing away from the relay, and the water cooling plate comprises: at least one water cooling channel; and a water inlet and a water outlet which are communicated with the at least one water cooling channel.
3. 3 . The high voltage box according to claim 2 , further comprising: a heat conduction pad and a heat-conduction insulating film, wherein the heat conduction pad is provided between the lower housing and the water cooling plate, and the heat-conduction insulating film is provided between the heat conduction pad and the water cooling plate.
4. 4 . The high voltage box according to claim 2 , wherein the lower housing comprises a metal portion and a plastic portion which are integrally molded by injection.
5. 5 . The high voltage box according to claim 4 , wherein one side of the metal portion away from the relay is exposed on a surface of the lower housing and is in contact with the water cooling plate.
6. 6 . The high voltage box according to claim 4 , wherein one side of the metal portion close to the relay comprises an electric connection region, and the one electric connection region is exposed on a surface of the lower housing.
7. 7 . The high voltage box according to claim 6 , wherein the electric connection region is of a convex structure.
8. 8 . The high voltage box according to claim 6 , wherein a chamfered structure is provided at an edge of at least one side of the electric connection region, and the chamfered structure is provided with an insulating layer.
9. 9 . A battery, comprising a high voltage box comprising: a housing, comprising an upper housing and a lower housing, the upper housing and the lower housing being connected to each other to form an accommodating space; a relay, provided in the accommodating space, the relay comprising a conducting strip leading out a circuit inside the relay and connected with outside, and the conducting strip being in contact with the lower housing; and at least one heat conduction metal block, wherein the at least one heat conduction metal block is provided in the accommodating space, and the at least one heat conduction metal block is connected to and in contact with both the conducting strip and the lower housing.
10. 10 . The battery according to claim 9 , wherein the high voltage box further comprises: a water cooling plate, wherein the water cooling plate is in contact with one side of the lower housing away from the relay, and the water cooling plate comprises: at least one water cooling channel; and a water inlet and a water outlet which are communicated with the at least one water cooling channel.
11. 11 . The battery according to claim 10 , wherein the high voltage box further comprises: a heat conduction pad and a heat-conduction insulating film, wherein the heat conduction pad is provided between the lower housing and the water cooling plate, and the heat-conduction insulating film is provided between the heat conduction pad and the water cooling plate.
12. 12 . The battery according to claim 10 , wherein the lower housing comprises a metal portion and a plastic portion which are integrally molded by injection.
13. 13 . The battery according to claim 12 , wherein one side of the metal portion away from the relay is exposed on a surface of the lower housing and is in contact with the water cooling plate.
14. 14 . The battery according to claim 12 , wherein one side of the metal portion close to the relay comprises an electric connection region, and the one electric connection region is exposed on a surface of the lower housing.
15. 15 . The battery according to claim 14 , wherein the electric connection region is of a convex structure.
16. 16 . The battery according to claim 14 , wherein a chamfered structure is provided at an edge of at least one side of the electric connection region, and the chamfered structure is provided with an insulating layer.
17. 17 . An electric device, comprising a battery configured to supply electric energy to the electric device, the battery comprising a high voltage box that comprises: a housing, comprising an upper housing and a lower housing, the upper housing and the lower housing being connected to each other to form an accommodating space; a relay, provided in the accommodating space, the relay comprising a conducting strip leading out a circuit inside the relay and connected with outside, and the conducting strip being in contact with the lower housing; and at least one heat conduction metal block, wherein the at least one heat conduction metal block is provided in the accommodating space, and the at least one heat conduction metal block is connected to and in contact with both the conducting strip and the lower housing.
18. 18 . The electric device according to claim 17 , wherein the high voltage box further comprises: a water cooling plate, wherein the water cooling plate is in contact with one side of the lower housing away from the relay, and the water cooling plate comprises: at least one water cooling channel; and a water inlet and a water outlet which are communicated with the at least one water cooling channel.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The present application is a continuation of International Application No. PCT/CN2022/093966, filed on May 19, 2022, which claims priority to Chinese Patent Application No. 202122866340.0, entitled “High Voltage Box, Battery and Electric Device”, filed on Nov. 22, 2021, the entire contents of both of which are incorporated herein by reference. TECHNICAL FIELD The present application relates to the field of electrochemical device technologies, and particularly to a high voltage box, a battery and an electric device. BACKGROUND ART In an electric device, such as an electric or hybrid vehicle, or the like, a high voltage box is a control unit for distributing energy of a power battery, and is configured to distribute a high voltage of the power battery. In a related art, the high voltage box usually has centralized design, and structural design is compact. In order to guarantee normal operation of the vehicle, the high voltage box is required to work in a vibration environment, a high and low temperature environment, a damp and hot environment, an environment with high power output, or the like. However, the existing high voltage box has a poor heat dissipation effect, such that the high voltage box has an overheating problem, or the like, thus influencing safety performances of the battery and the electric device. SUMMARY In view of the above-mentioned problems, an object of the embodiments of the present application is to provide a high voltage box, a battery and an electric device, so as to improve a heat dissipation effect of the high voltage box, thereby improving a safety performance of the battery. The specific technical solution is as follows. An embodiment of a first aspect of the present application provides a high voltage box, including: a housing and a relay, the housing including an upper housing and a lower housing, and the upper housing and the lower housing being connected to form an accommodating space; the relay being provided in the accommodating space, the relay including a conducting strip, and the conducting strip being in contact with the lower housing. In the technical solution of the embodiment of the present application, the high voltage box may be provided in a battery box, and the lower housing of the high voltage box is fixedly connected with the battery box. The relay is provided in the high voltage box, and the conducting strip of the relay is in direct contact with an inner side of the lower housing of the high voltage box. In a working process of the high voltage box, heat generated by work of the relay is transferred to the conducting strip of the relay, and since the conducting strip is in direct contact with the inner side of the lower housing, the heat in the conducting strip may be directly transferred into the lower housing and is rapidly transferred to the outside of the high voltage box via the lower housing, thus reducing a probability of transferring and storing the heat inside the high voltage box. The heat generated by the relay is rapidly dissipated via the conducting strip and the lower housing, such that a heat dissipation efficiency of the high voltage box may be improved, thereby reducing a probability of an overheating phenomenon, or the like, of the high voltage box, and improving the safety performance of the battery. In some embodiments, the high voltage box further includes a water cooling plate, the water cooling plate is in contact with one side of the lower housing away from the relay, the water cooling plate includes at least one water cooling channel, and the water cooling plate further includes a water inlet and a water outlet which are communicated with the at least one water cooling channel. Thus, the water cooling plate may absorb the heat transferred to the lower housing by components and parts, such as the relay, or the like, which may further improve the heat dissipation effect of the high voltage box, thereby further improving the safety performance of the battery. In some embodiments, the lower housing includes a metal portion and a plastic portion which are integrally molded by injection. Thus, the metal portion in the lower housing may more quickly absorb the heat generated by the components and parts, such as the relay, or the like, and transfer the heat away, thus further improving the heat dissipation effect of the high voltage box. In some embodiments, one side of the metal portion away from the relay is exposed on a surface of the lower housing and is in contact with the water cooling plate. Thus, the heat generated in the high voltage box may be quickly guided out via the metal portion and absorbed by the water cooling plate being in contact with the metal portion, which increases a heat transfer speed, thus further improving the heat dissipation effect of the high voltage box. In some embodiments, the high voltage box further includes at least one heat conduction metal block, the at least one h