阅读说明：本技术 电池箱、维修开关及其插头 (Battery box, maintenance switch and plug thereof ) 是由 张广超 李庆峰 尚珂会 于 2020-05-28 设计创作，主要内容包括：本发明涉及一种电池箱、维修开关及其插头。维修开关的插头包括具有容纳腔的主壳体；布置在容纳腔中的熔断件；具有与熔断件连接的连接端、以及用于与适配接触件连接的插接端的插头接触件；与主壳体连接的封板,其上设置有开口,供插头接触件的插接端伸出；容纳腔的腔壁与熔断件之间填充有导热胶,以将熔断件的热量传递至主壳体。熔断件作为插头中主要的发热元件,在熔断件与容纳腔的腔壁之间填充导热胶,导热胶能够及时地将熔断件自身、熔断件与插头接触件连接处产生的热量传递至主壳体,然后利用主壳体与外界环境进行热交换,从而避免了熔断件导通大电流时因热量积聚而导致的烧蚀、老化问题,提高了插头的使用寿命。(The invention relates to a battery box, a maintenance switch and a plug thereof. The plug of the maintenance switch comprises a main shell with a containing cavity; a fuse disposed in the receiving cavity; a plug contact having a connection end connected to the fuse element and a plug end for connection to the mating contact; the sealing plate is connected with the main shell and is provided with an opening for the insertion end of the plug contact to extend out; heat-conducting glue is filled between the cavity wall of the accommodating cavity and the fuse part so as to transfer heat of the fuse part to the main shell. The fuse-link is as main heating element in the plug, fills heat-conducting glue between fuse-link and the chamber wall that holds the chamber, and heat-conducting glue can be in time with fuse-link self, the heat transfer that fuse-link and plug contact junction produced to the main casing body, then utilizes the main casing body and external environment to carry out the heat exchange to ablation, the ageing problem that leads to because of the heat accumulation when having avoided the fuse-link to switch on the heavy current has improved the life of plug.)

1. A plug for a service switch, comprising:

a main housing having an accommodating chamber;

a fuse disposed in the receiving chamber;

a plug contact having a connection end connected to the fuse and a plug end for connection to the mating contact;

the sealing plate is connected with the main shell and is provided with an opening for the insertion end of the plug contact to extend out;

it is characterized in that the preparation method is characterized in that,

and heat-conducting glue is filled between the cavity wall of the accommodating cavity and the fuse part so as to transfer the heat of the fuse part to the main shell.

2. A service switch plug as claimed in claim 1, wherein the main housing and/or the sealing plate is provided with a glue injection opening for the passage of heat conducting glue for injection between the fuse element and the wall of the receiving cavity.

3. The service switch plug according to claim 2, wherein the main housing and/or the sealing plate is provided with an observation window for observing the glue injection condition.

4. The service switch plug as recited in claim 3, wherein the observation window and the glue injection port are disposed on the sealing plate.

5. A service switch plug as claimed in any one of claims 1 to 4, in which the outer surface of the main housing is provided with heat dissipating ribs for increasing the heat exchange area of the main housing.

6. A service switch plug as claimed in claim 5, wherein the main housing is a rectangular box having an opening at one side, the sealing plate is sealingly mounted at the opening of the main housing, and the heat dissipating ribs are disposed on respective sides of the rectangular box.

7. The service switch plug as recited in claim 6, wherein a plurality of heat dissipating ribs are provided on opposite side surfaces in a width direction of the rectangular box body, and the plurality of heat dissipating ribs are juxtaposed at intervals in a height direction of the rectangular box body and extend in a length direction of the rectangular box body.

8. The plug of the maintenance switch according to any one of claims 1 to 4, wherein the plug contact member and the fuse member are crimped and conducted by a terminal bolt connected to the main housing, and the main housing and the closing plate are fixedly connected by a plug bolt screwed to the main housing; the wiring bolt is connected at the two ends of the length direction of the main shell body, and the plug bolt is connected at the two ends of the width direction of the main shell body.

9. Service switch comprising a plug and a base adapted to the plug, characterized in that the plug is a plug of a service switch according to any of claims 1-8.

10. The battery box comprises a box body, wherein an electric core, a circuit conducted with the electric core and a maintenance switch connected to the circuit are arranged in the box body, the maintenance switch comprises a plug and a base, and the battery box is characterized in that the plug is the plug of the maintenance switch in any one of claims 1-8.

Technical Field

The invention relates to a battery box, a maintenance switch and a plug thereof.

Background

At present, the voltage used by electric vehicles is generally high voltage not less than 300V, and in order to avoid electric shock hazard caused by improper operation and damage of electrical components caused by overload and short circuit, a manual maintenance switch is required to be installed on a high-current main line of an automobile circuit. The manual maintenance switch plays a role in protecting a power supply in an electric automobile circuit, and when an emergency occurs or a battery is maintained and installed, an operator can disconnect the manual maintenance switch in time to disconnect the current of the battery box. In consideration of the trend of development of electric vehicle power supplies toward miniaturization and high energy density, power-related accessories such as maintenance switches are required to be compact, convenient and miniaturized.

Patent document No. CN110223896B, No. 2020.04.07 discloses a manual maintenance switch, which mainly comprises a plug and a base, wherein the plug comprises an upper cover and a protective cover, the upper cover is a rectangular box body, a fuse and a female terminal assembly electrically connected with the fuse are accommodated in the rectangular box body, the protective cover is connected with the upper cover to compress the fuse in the upper cover, and a sealing ring is embedded on the side of the upper cover facing the base. The base in the manual maintenance switch comprises a base shell, a sealing gasket is arranged on the side face, facing the plug, of the base shell, a male terminal assembly is fixedly arranged in the base shell, and when the plug is connected with the base, the male terminal assembly in the base can be inserted into a female terminal assembly of the plug, so that the plug is conducted with a base circuit.

The maintenance switch is compact in structure and small in occupied space, and can well meet the use requirement of an electric automobile power supply, however, technicians find that if the maintenance switch is frequently switched on with large current when in use, the problem of aging or terminal ablation of the maintenance switch can occur in a short service life period, the maintenance switch cannot normally play a role of fusing protection, and needs to be timely and frequently replaced, so that the use cost of a battery box is increased.

Disclosure of Invention

The invention aims to provide a plug of a maintenance switch, which is used for solving the problems of aging and ablation and short service life of the existing maintenance switch when a large current is conducted;

the invention also aims to provide a maintenance switch, which is used for solving the problems that the conventional maintenance switch is often aged and ablated and has short service life;

the invention also aims to provide a battery box, which is used for solving the problem that the service life of the existing maintenance switch of the battery box is short, and the service cost is high because the maintenance switch needs to be replaced frequently.

In order to achieve the purpose, the plug of the maintenance switch adopts the following technical scheme:

a plug for a service switch, comprising:

a main housing having an accommodating chamber;

a fuse disposed in the receiving chamber;

a plug contact having a connection end connected to the fuse and a plug end for connection to the mating contact;

the sealing plate is connected with the main shell and is provided with an opening for the insertion end of the plug contact to extend out;

and heat-conducting glue is filled between the cavity wall of the accommodating cavity and the fuse part so as to transfer the heat of the fuse part to the main shell.

The beneficial effects are that: the fuse-link is when the plug switches on heavy current, fuse-link self, the contact position of fuse-link and contact generates heat seriously, so that the fuse-link becomes main heating element in the plug, fill heat conduction glue between fuse-link and the chamber wall that holds the chamber, heat transfer to the main casing body that the heat that produces can be in time with fuse-link self, fuse-link and plug contact junction with heat conduction glue, then utilize the main casing body and external environment to carry out the heat exchange, thereby ablation that the fuse-link leads to because of the heat accumulation when having avoided the fuse-link to switch on heavy current, ageing problem, the life of plug has been improved.

Further, be provided with the injecting glue mouth on main casing body and/or the shrouding, supply heat-conducting glue to pass through in order to pour into between the fuse-link and the chamber wall that holds the chamber.

The beneficial effects are that: set up the injecting glue mouth on main casing body and/or shrouding, operating personnel can be in the spare part assembly of plug after, and rethread injecting glue mouth pours into heat-conducting glue into, has realized earlier assembly promptly, back injecting glue, and whole process controls the injecting glue volume easily, and the operation is fairly simple, and efficiency is also than higher.

Further, an observation window for observing the glue injection condition is arranged on the main shell and/or the sealing plate.

The beneficial effects are that: set up the observation window, can make operating personnel observe position and form of heat-conducting glue at the injecting glue in-process, control the injecting glue quality more easily, be favorable to reducing the waste product quantity that produces because of the injecting glue flaw simultaneously, improve the yields.

Furthermore, observation window and injecting glue mouth set up on the shrouding.

The beneficial effects are that: with observation window and injecting glue mouth all setting on the shrouding, can make operating personnel both pour into glue into from the shrouding when the injecting glue, can follow the shrouding again and observe the heat-conducting glue, it is more convenient to operate.

Further, the outer surface of the main shell is provided with a heat dissipation convex rib for increasing the heat exchange area of the main shell.

The beneficial effects are that: set up the protruding muscle of heat dissipation on the main casing body, the protruding muscle of heat dissipation can increase main casing body heat transfer area, and then improves the heat exchange efficiency of the main casing body, makes the main casing body can more dispel the heat that the heat-conducting glue transmission comes to promote the heat-sinking capability of whole plug, avoid fuse-element department heat to gather and lead to the emergence of ablation, ageing scheduling problem.

Further, the main casing body is a rectangular box body with an opening on one side, the sealing plate is mounted at the opening of the main casing body in a sealing mode, and the heat dissipation convex ribs are arranged on each side face of the rectangular box body.

The beneficial effects are that: the main shell is designed into a rectangular box body with an opening at one side, and a closed space can be enclosed by the sealing plate, so that glue can be injected conveniently; meanwhile, the filling amount of the heat-conducting glue can be increased, so that the heat dissipation efficiency of the plug is improved, and heat generated at the connection part of the fuse part and the plug contact element is timely transferred outwards.

Furthermore, the heat dissipation convex ribs arranged on the two opposite side faces in the width direction of the rectangular box body are arranged in parallel at intervals in the height direction of the rectangular box body and extend along the length direction of the rectangular box body.

The beneficial effects are that: the heat dissipation convex ribs on the opposite two side faces in the width direction of the rectangular box body are designed to be arranged at intervals in the height direction and extend in the length direction, so that the heat exchange area of the main shell can be increased, an operation part for a person to hold to drive a plug can be formed, the arrangement of the redundant structure of the main shell is reduced, and the structure of the main shell is simpler.

Furthermore, the plug contact element and the fuse element are connected and conducted through a connecting bolt connected to the main shell in a compression joint mode, and the main shell is fixedly connected with the sealing plate through a plug bolt screwed on the main shell; the wiring bolt is connected at the two ends of the length direction of the main shell body, and the plug bolt is connected at the two ends of the width direction of the main shell body.

The beneficial effects are that: with wiring bolt and plug bolt dispersion arrangement, can avoid appearing the screw in the main casing body and concentrate and arrange and influence radiating intensive structure, can make the heat outwards transmit through heat-conducting glue in time, avoid fuse-link and plug contact to ablate in the short time, age.

In order to achieve the purpose, the maintenance switch adopts the following technical scheme:

the maintenance switch comprises a plug and a base matched with the plug;

the plug includes:

a main housing having an accommodating chamber;

a fuse disposed in the receiving chamber;

a plug contact having a connection end connected to the fuse and a plug end for connection to the mating contact;

the sealing plate is connected with the main shell and is provided with an opening for the insertion end of the plug contact to extend out;

and heat-conducting glue is filled between the cavity wall of the accommodating cavity and the fuse part so as to transfer the heat of the fuse part to the main shell.

The beneficial effects are that: the fuse-link is when the plug switches on heavy current, fuse-link self, the contact position of fuse-link and contact generates heat seriously, so that the fuse-link becomes main heating element in the plug, fill heat conduction glue between fuse-link and the chamber wall that holds the chamber, heat transfer to the main casing body that the heat that produces can be in time with fuse-link self, fuse-link and plug contact junction with heat conduction glue, then utilize the main casing body and external environment to carry out the heat exchange, thereby ablation that the fuse-link leads to because of the heat accumulation when having avoided the fuse-link to switch on heavy current, ageing problem, the life of plug has been improved.

Further, be provided with the injecting glue mouth on main casing body and/or the shrouding, supply heat-conducting glue to pass through in order to pour into between the fuse-link and the chamber wall that holds the chamber.

The beneficial effects are that: set up the injecting glue mouth on main casing body and/or shrouding, operating personnel can be in the spare part assembly of plug after, and rethread injecting glue mouth pours into heat-conducting glue into, has realized earlier assembly promptly, back injecting glue, and whole process controls the injecting glue volume easily, and the operation is fairly simple, and efficiency is also than higher.

Further, an observation window for observing the glue injection condition is arranged on the main shell and/or the sealing plate.

The beneficial effects are that: set up the observation window, can make operating personnel observe position and form of heat-conducting glue at the injecting glue in-process, control the injecting glue quality more easily, be favorable to reducing the waste product quantity that produces because of the injecting glue flaw simultaneously, improve the yields.

Furthermore, observation window and injecting glue mouth set up on the shrouding.

The beneficial effects are that: with observation window and injecting glue mouth all setting on the shrouding, can make operating personnel both pour into glue into from the shrouding when the injecting glue, can follow the shrouding again and observe the heat-conducting glue, it is more convenient to operate.

Further, the outer surface of the main shell is provided with a heat dissipation convex rib for increasing the heat exchange area of the main shell.

The beneficial effects are that: set up the protruding muscle of heat dissipation on the main casing body, the protruding muscle of heat dissipation can increase main casing body heat transfer area, and then improves the heat exchange efficiency of the main casing body, makes the main casing body can more dispel the heat that the heat-conducting glue transmission comes to promote the heat-sinking capability of whole plug, avoid fuse-element department heat to gather and lead to the emergence of ablation, ageing scheduling problem.

Further, the main casing body is a rectangular box body with an opening on one side, the sealing plate is mounted at the opening of the main casing body in a sealing mode, and the heat dissipation convex ribs are arranged on each side face of the rectangular box body.

The beneficial effects are that: the main shell is designed into a rectangular box body with an opening at one side, and a closed space can be enclosed by the sealing plate, so that glue can be injected conveniently; meanwhile, the filling amount of the heat-conducting glue can be increased, so that the heat dissipation efficiency of the plug is improved, and heat generated at the connection part of the fuse part and the plug contact element is timely transferred outwards.

Furthermore, the heat dissipation convex ribs arranged on the two opposite side faces in the width direction of the rectangular box body are arranged in parallel at intervals in the height direction of the rectangular box body and extend along the length direction of the rectangular box body.

The beneficial effects are that: the heat dissipation convex ribs on the opposite two side faces in the width direction of the rectangular box body are designed to be arranged at intervals in the height direction and extend in the length direction, so that the heat exchange area of the main shell can be increased, an operation part for a person to hold to drive a plug can be formed, the arrangement of the redundant structure of the main shell is reduced, and the structure of the main shell is simpler.

Furthermore, the plug contact element and the fuse element are connected and conducted through a connecting bolt connected to the main shell in a compression joint mode, and the main shell is fixedly connected with the sealing plate through a plug bolt screwed on the main shell; the wiring bolt is connected at the two ends of the length direction of the main shell body, and the plug bolt is connected at the two ends of the width direction of the main shell body.

The beneficial effects are that: with wiring bolt and plug bolt dispersion arrangement, can avoid appearing the screw in the main casing body and concentrate and arrange and influence radiating intensive structure, can make the heat outwards transmit through heat-conducting glue in time, avoid fuse-link and plug contact to ablate in the short time, age.

In order to achieve the purpose, the battery box adopts the following technical scheme:

the battery box comprises a box body, wherein a battery cell, a circuit conducted with the battery cell and a maintenance switch connected on the circuit are arranged in the box body, and the maintenance switch comprises a plug and a base; wherein the plug includes:

a main housing having an accommodating chamber;

a fuse disposed in the receiving chamber;

a plug contact having a connection end connected to the fuse and a plug end for connection to the mating contact;

the sealing plate is connected with the main shell and is provided with an opening for the insertion end of the plug contact to extend out;

and heat-conducting glue is filled between the cavity wall of the accommodating cavity and the fuse part so as to transfer the heat of the fuse part to the main shell.

The beneficial effects are that: the fuse piece is when the plug switches on heavy current, fuse piece self, the contact position of fuse piece and contact generates heat seriously, so that the fuse piece becomes main heating element in the plug, fill heat-conducting glue between fuse piece and the chamber wall that holds the chamber, heat-conducting glue can be in time with fuse piece self, the heat transfer that fuse piece and plug contact junction produced to the main casing body, then utilize the main casing body and external environment to carry out the heat exchange, thereby ablation, the ageing problem that leads to because of the heat accumulation when having avoided the fuse piece to switch on heavy current, the life of plug has been improved, the holistic in service time of battery box has been increased, can avoid the problem that battery box use cost is high because of frequently changing maintenance switch.

Further, be provided with the injecting glue mouth on main casing body and/or the shrouding, supply heat-conducting glue to pass through in order to pour into between the fuse-link and the chamber wall that holds the chamber.

The beneficial effects are that: set up the injecting glue mouth on main casing body and/or shrouding, operating personnel can be in the spare part assembly of plug after, and rethread injecting glue mouth pours into heat-conducting glue into, has realized earlier assembly promptly, back injecting glue, and whole process controls the injecting glue volume easily, and the operation is fairly simple, and efficiency is also than higher.

Further, an observation window for observing the glue injection condition is arranged on the main shell and/or the sealing plate.

The beneficial effects are that: set up the observation window, can make operating personnel observe position and form of heat-conducting glue at the injecting glue in-process, control the injecting glue quality more easily, be favorable to reducing the waste product quantity that produces because of the injecting glue flaw simultaneously, improve the yields.

Furthermore, observation window and injecting glue mouth set up on the shrouding.

The beneficial effects are that: with observation window and injecting glue mouth all setting on the shrouding, can make operating personnel both pour into glue into from the shrouding when the injecting glue, can follow the shrouding again and observe the heat-conducting glue, it is more convenient to operate.

Further, the outer surface of the main shell is provided with a heat dissipation convex rib for increasing the heat exchange area of the main shell.

The beneficial effects are that: set up the protruding muscle of heat dissipation on the main casing body, the protruding muscle of heat dissipation can increase main casing body heat transfer area, and then improves the heat exchange efficiency of the main casing body, makes the main casing body can more dispel the heat that the heat-conducting glue transmission comes to promote the heat-sinking capability of whole plug, avoid fuse-element department heat to gather and lead to the emergence of ablation, ageing scheduling problem.

Further, the main casing body is a rectangular box body with an opening on one side, the sealing plate is mounted at the opening of the main casing body in a sealing mode, and the heat dissipation convex ribs are arranged on each side face of the rectangular box body.

The beneficial effects are that: the main shell is designed into a rectangular box body with an opening at one side, and a closed space can be enclosed by the sealing plate, so that glue can be injected conveniently; meanwhile, the filling amount of the heat-conducting glue can be increased, so that the heat dissipation efficiency of the plug is improved, and heat generated at the connection part of the fuse part and the plug contact element is timely transferred outwards.

Furthermore, the heat dissipation convex ribs arranged on the two opposite side faces in the width direction of the rectangular box body are arranged in parallel at intervals in the height direction of the rectangular box body and extend along the length direction of the rectangular box body.

The beneficial effects are that: the heat dissipation convex ribs on the opposite two side faces in the width direction of the rectangular box body are designed to be arranged at intervals in the height direction and extend in the length direction, so that the heat exchange area of the main shell can be increased, an operation part for a person to hold to drive a plug can be formed, the arrangement of the redundant structure of the main shell is reduced, and the structure of the main shell is simpler.

Furthermore, the plug contact element and the fuse element are connected and conducted through a connecting bolt connected to the main shell in a compression joint mode, and the main shell is fixedly connected with the sealing plate through a plug bolt screwed on the main shell; the wiring bolt is connected at the two ends of the length direction of the main shell body, and the plug bolt is connected at the two ends of the width direction of the main shell body.

The beneficial effects are that: with wiring bolt and plug bolt dispersion arrangement, can avoid appearing the screw in the main casing body and concentrate and arrange and influence radiating intensive structure, can make the heat outwards transmit through heat-conducting glue in time, avoid fuse-link and plug contact to ablate in the short time, age.

Drawings

FIG. 1 is a schematic external view of a service switch according to embodiment 1 of the present invention;

FIG. 2 is a schematic structural view of various components of the service switch of FIG. 1;

FIG. 3 is a schematic view of the bottom of the plug of FIG. 1;

FIG. 4 is a schematic structural view of various components of the plug of FIG. 1;

FIG. 5 is a schematic structural diagram of the main housing of FIG. 2;

FIG. 6 is a schematic view of the maintenance switch of FIG. 1 without the main housing;

FIG. 7 is a schematic view of the closure plate of FIG. 2;

FIG. 8 is a schematic view of a service switch according to embodiment 1 of the present invention, showing a plug contact member and a base contact member being inserted;

FIG. 9 is a schematic structural view of various components of the base of FIG. 1;

FIG. 10 is a schematic view of another embodiment of the service switch of the present invention showing the structure of the bottom of the plug;

FIG. 11 is an exploded perspective view of the plug of FIG. 10;

FIG. 12 is a schematic view of the closure plate of FIG. 11;

in the figure:

10-a plug; 11-a main housing; 111-a first hollow cylinder; 112-a second hollow cylinder; 113-a via;

114-a containment chamber; 115-a mounting groove; 116-top surface bead; 117-vertical ribs; 118-transverse ribs; 12-a fuse;

13-a plug contact; 14-closing the plate; 141-large opening; 142-a small opening; 143-rectangular grooves; 144-a contact mounting slot; 149-small round hole;

145-through holes; 146-avoidance holes; 15-a wiring bolt; 16-plug bolts; 17-a sealing ring; 18-a first thread insert;

19-a second thread insert; 20-a base; 21-a base housing; 211-a first receptacle; 212-a second receptacle; 22-a base contact;

23-a cover plate; 24-a gasket; 25-base thread insert; 26-base bolt; 30-connecting bolts.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The features and properties of the present invention are further described in detail below with reference to examples.

Example 1 of the maintenance switch of the present invention: the maintenance switch is installed on the box of battery box, and when emergency or need maintain the battery box and install, operating personnel can the manual disconnection maintenance switch to with battery box internal current disconnection. As shown in fig. 1, the service switch mainly includes two parts, namely a base 20 fixed with the box body of the battery box and a plug 10 detachably connected with the base 20, contacts are arranged in both the base 20 and the plug 10, and when the plug 10 is connected with the base 20, the corresponding contacts can conduct the circuit.

As shown in fig. 2, 3 and 4, the plug 10 of the service switch includes a main housing 11 as a housing portion and a cover plate 14, the cover plate 14 is connected to an opening of the main housing 11, a fuse 12 as a fuse is disposed in a space surrounded by the main housing 11 and the cover plate 14, and plug contacts 13 disposed at both ends of the fuse 12 in a longitudinal direction.

As shown in fig. 6, the fuse 12 includes a fuse body and fuse terminals disposed at both ends of the fuse body, and the connection ends of the plug contacts 13 are conductively connected with the terminals of the fuse 12, so that when the maintenance switch is in use, current passes through the fuse 12 between the two plug contacts 13, and when a short-circuit current passes through the fuse 12, the fuse 12 cuts off the circuit, thereby ensuring the safety of electricity utilization. When the fuse 12 is used, if a large current is conducted for a long time, the fuse 12 can be ablated and aged due to heat accumulation, so that in order to avoid the ablation and aging of the fuse 12 and the whole plug 10 due to the heat accumulation and ensure that the fuse 12 can normally play a fusing protection role, the plug 10 in the invention is filled with heat-conducting glue at the fuse 12, so that the heat can be rapidly transferred to the main shell 11, and then the main shell 11 is utilized to carry out heat exchange with the external environment.

Specifically, as shown in fig. 5, the main housing 11 is in the shape of a rectangular box, in which an accommodating cavity 114 for accommodating the fuse 12 is preset, and hollow cylinders extending in the plugging direction are arranged, the hollow cylinders include a first hollow cylinder 111 and a second hollow cylinder 112, and a radial dimension of the first hollow cylinder 111 is larger than a radial dimension of the second hollow cylinder 112. The first hollow cylinder 111 is located at two ends of the main housing 11 in the length direction, and a first threaded sleeve 18 is inserted therein, and a tooth shape is provided on the outer circumferential surface of the first threaded sleeve 18 to be fixed relative to the first hollow cylinder 111 when being inserted into the first hollow cylinder 111. The second hollow cylinders 112 are located at two ends of the main housing 11 in the width direction, four of the second hollow cylinders 112 are arranged, two of the second hollow cylinders are arranged at intervals in the width direction, a second threaded sleeve 19 is inserted into the second hollow cylinder 112, and a tooth shape is arranged on the outer peripheral surface of the second threaded sleeve 19 so as to be fixed relative to the second hollow cylinder 112 when the second hollow cylinder 112 is inserted.

Wherein, the plug 10 is configured with a wiring bolt 15, the wiring bolt 15 corresponds to the first hollow column 111, and the plug contact 13 and the terminal of the fuse 12 are both provided with an avoiding opening for avoiding the wiring bolt 15, so that when the wiring bolt 15 is connected with the first threaded sleeve 18 in the first hollow column 111, the plug contact 13 is pressed on the terminal of the fuse 12, and the fuse 12 is also pressed in the main housing 11 by the wiring bolt 15.

At the edge of the main housing 11, six through holes 113 are provided, through which corresponding connecting bolts 30 can pass, so that the connecting bolts 30 are screwed with the base 20, thereby realizing the detachable connection of the main housing 11 and the base 20. The inner side of a closed curve surrounded by the six through holes 113 is provided with a mounting groove 115, a sealing ring 17 is embedded in the mounting groove 115, when the plug 10 is connected with the base 20, the sealing ring 17 can be extruded to deform, and the connection tightness is further ensured.

As shown in fig. 7, 8 and 9, the cover plate 14 is provided with a rectangular recess 143 corresponding to the fuse body, and when the cover plate 14 is connected to the main housing 11, the lower half portion of the fuse body can be sunk into the rectangular recess 143 of the cover plate 14. The two ends of the closing plate 14 in the length direction are provided with avoidance holes 146 for avoiding bolt heads in the wiring bolts 15, a contact mounting groove 144 for installing and clamping the plug contact 13 is further arranged between the two avoidance holes 146, and the bottom of the contact mounting groove 144 is a large opening 141 for extending out of a plug end of the plug contact, so that when the plug is matched with the base, the plug contact 13 can extend into the base 20 and is matched with the contact in the base 20 in a plug-in manner. The edge of the sealing plate 14 is provided with a through hole 146 corresponding to the second hollow cylinder 112 for the plug bolt 16 to pass through, and after the plug bolt 16 passes through the through hole 146, the plug bolt is screwed with the second thread insert 19 in the second hollow cylinder 112, thereby realizing the connection between the sealing plate 14 and the main housing 11.

Between the fuse main part and the chamber wall that holds the chamber, it has the heat transfer that is used for with the fuse main part to main casing body heat conduction glue to fill, and the heat conductivity of heat conduction glue is higher, can be in time with the heat transfer to main casing body 11 of fuse 12 department on to the heat of fuse 12 is dispelled, avoids the emergence of ablation, ageing problem. Be provided with injecting glue mouth and observation window on shrouding 14, the injecting glue mouth supplies operating personnel to pour into the thermal conductive glue into fuse main part and the chamber wall that holds the chamber, and operating personnel can observe the condition that the thermal conductive glue flows, solidifies and distributes in the main casing body through the observation window when carrying out the injecting glue operation. In combination with the structure of the cover plate 14, four small openings 142 penetrating through two sides of the bottom of the rectangular groove 143 are provided at the bottom of the rectangular groove 143, wherein some of the small openings 142 can be used as observation windows, and the other small openings 142 are used as glue injection openings.

In other embodiments, the observation window may be disposed on the main housing, and the glue injection port may be disposed on the sealing plate, or the observation window may be disposed on the sealing plate and the glue injection port may be disposed on the main housing. Still alternatively, as shown in fig. 10 to 12, in another embodiment of the service switch, four rectangular small openings 142 are arranged on the sealing plate 14 in a matrix manner at the middle position, the four small openings 142 are all used as observation windows, small round holes 149 are further arranged at positions near four corners of the sealing plate 14, and the small round holes 149 are used as glue injection ports, so that glue can be injected into the space enclosed by the sealing plate 14 and the main housing 11 relatively uniformly.

It should be noted that, when the heat-conducting glue is injected, the heat-conducting glue is in a fluid state, an operator injects glue in batches, a small amount of heat-conducting glue is injected each time, the heat-conducting glue is injected again after being cured, and the process is circulated until the glue injection operation is completed. The purpose of doing so is, the injecting glue volume at every turn of control, can control the position that the heat-conducting glue distributes better, and heat-conducting glue overflows to plug contact 13 in when avoiding the injecting glue, influences the normal grafting cooperation of contact in plug contact and the base. When filling the heat conduction glue, see heat conduction glue and fuse parallel and level or cover the fuse a little from the observation window, can stop the injecting glue to avoid the injecting glue too much and make the heat conduction glue get into in the plug contact.

Because the heat conduction glue can be with fuse 12 heat transfer to main casing body 11 that produces during the operation, so also correspond on main casing body 11 and arrange the protruding muscle of heat dissipation, specifically speaking, all arrange the protruding muscle of heat dissipation on every side of main casing body 11, wherein, be provided with the protruding muscle 116 of top surface of a plurality of closed loop types on the top surface, formed sunken between the closed loop, and then increased the heat transfer area that main casing body 11's top surface and air carry out the heat exchange.

A plurality of vertical convex ribs 117 extending along the up-down direction are arranged on two opposite side faces of the length direction of the main shell 11, and sunken depressions are formed between the vertical convex ribs 117, so that the heat exchange area of the heat exchange between the side faces of the main shell 11 and air is increased, and the heat dissipation efficiency is improved.

A plurality of transverse convex ribs 118 extending along the length direction are arranged on two opposite side surfaces of the main shell 11 in the width direction, intervals are arranged between the transverse convex ribs, and the transverse convex ribs 118 are arranged in parallel at intervals in the height direction of the main shell 11, so that the transverse convex ribs 118 not only can increase the heat exchange area of the main shell 11, but also can form an operation part, and an operator can drive the plug and the base to be plugged by holding the transverse convex ribs 118. In other embodiments, the lateral ribs may be provided on both sides of the main casing opposite in the longitudinal direction, and the vertical ribs may be provided on both sides of the main casing opposite in the width direction.

The base 20 then comprises a base housing 21, on the side of the base housing 21 facing the plug, a sealing gasket 24 arranged, and a cover plate 23 pressing over the sealing gasket 24. The base housing 21 is provided with a base contact 22, and a mating end of the base contact 22, which is connected to the plug contact 13, is exposed from the base 20, and can be mated with the plug contact 13 when the plug 10 is connected to the base 20.

Two types of jacks with different radial sizes are arranged on the base shell 21, namely a first jack 211 and a second jack 212, base threaded sleeves 25 are respectively arranged in the first jack 211 and the second jack 212, the outer peripheral surfaces of the base threaded sleeves 25 are in a tooth shape, and the base threaded sleeves are relatively fixed with the two types of jacks after being inserted into the first jack 211 and the second jack 212. The first insertion hole 211 corresponds to the through hole 113 of the main housing 11 and is used for being screwed with the connection bolt 30 to realize the detachable connection between the plug 10 and the base 20, the second insertion hole 212 is adapted to the base bolt 26 in the base 20, the base bolt 26 is used for pressing the cover plate 23 onto the sealing pad 24, and the cover plate 23 is also correspondingly provided with through holes for the connection bolt 30 and the base bolt 26 to pass through.

The fuse-link is as main heating element in the plug, fills heat-conducting glue between fuse-link and the chamber wall that holds the chamber, and heat-conducting glue can be in time with fuse-link self, the heat transfer that fuse-link and plug contact junction produced to the main casing body, then utilizes the main casing body and external environment to carry out the heat exchange to ablation, the ageing problem that leads to because of the heat accumulation when having avoided the fuse-link to switch on the heavy current has improved the life of plug.

Of course, the maintenance switch in the present invention is not limited to the technical solutions provided in the above embodiments, and the technical solutions provided in the following embodiments may also be adopted.

The embodiment 2 of the maintenance switch of the invention is different from the above embodiments in that the plug of the maintenance switch comprises a main shell body in a rectangular box shape, the main shell body is provided with an accommodating cavity for a fuse element, when assembling, a technician firstly injects heat-conducting glue into the accommodating cavity of the main shell body, then fixes the fuse element on the main shell body, and then subsequently installs components such as a contact element into the main shell body. The heat-conducting glue is located between the cavity wall of the accommodating cavity and the fuse piece after being solidified, and the heat of the fuse piece can be transferred to the main shell. The operating mode of injecting glue earlier and then assembling is adopted in this embodiment to no longer set up the injecting glue mouth on main casing body or shrouding, though different with the structure of the mode of injecting glue again, main casing body and shrouding earlier each components and parts assembly in embodiment 1, nevertheless can realize in time dispelling the thermal function of fuse-link.

The difference between the embodiment 3 of the maintenance switch of the present invention and the above embodiments is that in this embodiment, an opening is formed on the sealing plate, and the opening is sealed by transparent glass or transparent acrylic material, so that the observation window is a closed structure, which is different from the scheme of embodiment 1 in which the opening on the sealing plate is used as the observation window. In other embodiments, main casing and/or shrouding no longer set up the observation window, operating personnel need calculate the injecting glue volume of injecting glue at every turn in advance, and the ration is injected into the heat conduction glue afterwards, guarantees the quality through the glue injection volume of strict control, no longer observes the injecting glue process.

The embodiment 4 of the maintenance switch of the invention is different from the above embodiments in that in this embodiment, a fan can be additionally arranged above the main casing, the speed of air circulation is increased to take away more heat, the speed of heat exchange between the main casing and the external environment is increased, the heat accumulated at the fuse part is timely discharged by increasing the temperature difference between the main casing and the fuse part, and the problems of ablation and aging of the maintenance switch are avoided, so that the maintenance switch is not limited to the scheme of arranging the heat dissipation convex ribs on the main casing.

The difference between the embodiment 5 of the maintenance switch of the present invention and the above embodiments is that in this embodiment, the main housing of the plug is a square tube structure, two ends of the square tube structure are open, and the fuse element and the plug contact element are fixed in the inner cavity of the square tube structure. The square tube structure has an opening at one end facing the socket, and the opening at the one end can also make the plug end of the plug contact extend out to be in plug fit with the adaptive contact in the base. And the other end opening of square tube structure can be through pouring into heat conduction glue into, rely on the heat conduction glue solidification back to carry out the shutoff, it has heat conduction glue to fill between the inboard cylinder of square tube structure and the fuse-link this moment, can be structural with heat transfer to square tube, and the protruding muscle of heat dissipation has been arranged on the outer peripheral face of square tube structure, can accelerate square tube structure and external environment and carry out the speed of heat exchange, so do not confine the adoption to have only one side open-ended rectangle box body and come as the main casing body.

Embodiment 6 of the maintenance switch of the present invention is different from the above embodiments in that in this embodiment, one side of the sealing plate facing the main housing is provided with an elastic claw, a clamping groove adapted to the elastic claw is provided at a position corresponding to the main housing, and the sealing plate can be relatively fixed to the main housing by the clamping engagement of the elastic claw and the clamping groove, and at this time, only a wiring bolt needs to be arranged in the main housing, and a hole site through which a bolt passes to connect the main housing and the sealing plate does not need to be arranged.

The embodiment of the plug of the maintenance switch of the invention is as follows: the structure of the plug of the service switch of the present invention is the same as that of the plug of the service switch embodiment described above, and therefore, description about the embodiment of the plug of the service switch will not be repeated.

The embodiment of the battery box in the invention comprises the following components: the battery box is generally installed in an electric vehicle and used as a power source for supplying power to a motor of the electric vehicle. The battery box comprises a box body, wherein the box body is internally provided with a battery core, a circuit conducted with the battery core and a maintenance switch connected on the circuit, and the structures of the battery box are the same as those of other existing battery boxes.

The above-mentioned embodiments, the objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.