Electric automobile power supply output busbar and electric automobile circuit system

Abstract

The utility model relates to the field of safety of electric automobile circuit systems, and discloses an electric automobile power supply output busbar which comprises two busbar connectors used for connecting a power supply and a wire; two ends of the insulating connecting seat are fixed with the two busbar joints, and the insulating connecting seat is used for connecting and fixing the two busbar joints; two ends of the circuit break protection component are electrically connected with the two busbar joints respectively; and the insulating layer is wrapped outside. According to the application, the circuit break protection component is integrated with the two busbar joints, so that the power supply output busbar is provided with the circuit break protection component, when the current of the wire is larger and exceeds the maximum current of the circuit break protection component, the circuit break protection component starts circuit break protection, and the wire is disconnected from the power supply at the moment; therefore, the wire is not electrically connected with the power supply any more, the temperature of the wire is gradually reduced, the risk of spontaneous combustion caused by connection of the wire and the power supply is greatly reduced, the safety coefficient of the circuit system of the electric vehicle is improved, and the potential safety hazard of the circuit system of the electric vehicle is reduced.

Description

Technical Field

[0001] The present application relates to the safety field of a power output busbar in a circuit system of an electric vehicle, and in particular to an electric vehicle power output busbar and an electric vehicle circuit system. Background Art

[0002] With the development of automobile technology, electric vehicles have gradually entered the public's field of vision. Electric vehicles refer to vehicles that use onboard power as power, use motors to drive wheels, and meet the requirements of road traffic and safety regulations. Because they have less impact on the environment than traditional vehicles, their prospects are widely optimistic.

[0003] With the development of electric vehicles, electric vehicle batteries have also faced huge technical challenges. Electric vehicle batteries are also constantly developing and improving. At present, electric vehicle batteries are divided into two categories: storage batteries and fuel cells.

[0004] The battery is suitable for pure electric vehicles, including lead-acid batteries, nickel-metal hydride batteries, sodium-sulfur batteries, secondary lithium batteries, air batteries, and ternary lithium batteries. The fuel cell is dedicated to fuel cell electric vehicles, including alkaline fuel cells (AFC), phosphoric acid fuel cells (PAFC), molten carbonate fuel cells (MCFC), solid oxide fuel cells (SOFC), proton exchange membrane fuel cells (PEMFC), and direct methanol fuel cells (DMFC).

[0005] Regardless of which electric vehicle battery is used, when assembling the electric vehicle circuit system, a power output busbar will be installed on the output end of the electric vehicle battery. The power output busbar is a common copper busbar or aluminum busbar installed and connected to the output end of the electric vehicle battery, such as Figure 1 As shown, it is a common power output busbar 100 on an electric vehicle battery, the surface of which is usually insulated and is mainly used as a conductor.

[0006] At present, the circuit system of common electric vehicles usually consists of a closed loop consisting of a power supply, a power output busbar, wires, circuit breaker protection components and a load. Usually, the power output busbar is electrically connected to the power supply, and the wires are electrically connected to the power output busbar. The circuit breaker protection components are usually installed on the wires. When the load power is large, the output current of the power supply is usually large, which makes the heat generated by the wires due to their own resistance also high, causing the wires of the electric vehicle circuit system to overheat and catch fire, which is also the main reason for the fire and spontaneous combustion of electric vehicles. At this time, the role of the circuit breaker protection components on the electric vehicle is particularly important. Usually, when the output current of the on-board power supply or the working current of the load is large, The circuit breaker protection component will automatically break the circuit to protect the electric vehicle's circuit system, thereby avoiding greater dangerous accidents. However, when the circuit breaker protection component is disconnected due to the large output current of the vehicle power supply or the working current of the load, the wire between the vehicle power supply and the circuit breaker protection component is still connected to the output end of the vehicle power supply, which makes it difficult for the heat on the wire to dissipate. The wire still has the risk of catching fire due to overheating, which makes the circuit system of the electric vehicle have great safety hazards, brings great uncertainty to the circuit system of the electric vehicle and the safety of the electric vehicle and the driver, reduces the safety factor, and increases the risk of fire and spontaneous combustion of the electric vehicle caused by the circuit system. Summary of the invention

[0007] In order to reduce the risk of fire caused by overheating of the wires in the circuit system of an electric vehicle, and at the same time improve the safety factor of the electric vehicle circuit system and reduce the potential safety hazards of the electric vehicle circuit system, the present application provides an electric vehicle power output busbar and an electric vehicle circuit system, which integrates a circuit breaker protection component with two busbar connectors so that the power output busbar has a built-in circuit breaker protection component, so that when the current in the wire is larger than the maximum current of the circuit breaker protection component, the circuit breaker protection component turns on the circuit breaker protection. At this time, the wire is disconnected from the power supply, so that the wire is no longer electrically connected to the power supply, and the temperature of the wire gradually decreases, which greatly reduces the risk of spontaneous combustion caused by the connection between the wire and the power supply, improves the safety factor of the electric vehicle circuit system, and reduces the potential safety hazards of the electric vehicle circuit system.

[0008] In the first aspect, the present application provides an electric vehicle power output busbar, which adopts the following technical solution:

[0009] An electric vehicle power output busbar, comprising:

[0010] Two busbar connectors, used to connect power supply and wires respectively;

[0011] The insulating connection seat has two ends respectively fixedly connected to the two busbar connectors, is located between the two busbar connectors, and is used to connect and fix the two busbar connectors;

[0012] A circuit breaker protection component, both ends of which are fixedly and electrically connected to the two busbar connectors, and is located between the two busbar connectors; and

[0013] The insulating layer is wrapped around the insulating connection base, the circuit breaker protection components and the outside of the two busbar connectors.

[0014] Preferably, the circuit breaker protection component is a fuse.

[0015] Preferably, the fuse is detachably fixedly connected to the two busbar connectors.

[0016] Preferably, the fuse is connected to the two busbar connectors via bolts.

[0017] Preferably, a screw is passed through the fuse and the busbar joint, a nut is threadedly connected to the bolt, a gasket is sleeved on the screw, and the gasket is located between the fuse and the nut.

[0018] Preferably, it further comprises an insulating shell, wherein the insulating shell covers the outside of the insulating connection seat and the circuit breaker protection component, and the insulating shell is fixedly connected to the insulating connection seat.

[0019] Preferably, the insulating housing comprises an upper cover and a lower cover, the upper cover is plugged into the lower cover, and the upper cover and the lower cover are respectively located on both sides of the insulating connecting seat and the fuse.

[0020] Preferably, the insulating layer is a mica tape, and the mica tape is wrapped around the insulating connecting seat, the insulating shell and the outside of the two busbar joints.

[0021] Preferably, the edge of the busbar joint is wrapped with a double-sided tape for bonding the edge of the mica tape.

[0022] In a second aspect, the present application provides an electric vehicle circuit system, which adopts the following technical solution:

[0023] An electric vehicle circuit system comprises the electric vehicle power output busbar described above.

[0024] In summary, this application includes the following beneficial technical effects:

[0025] 1. The present application integrates the circuit breaker protection component with the two busbar connectors so that the power output busbar is equipped with a circuit breaker protection component. When the current of the wire is larger than the maximum current of the circuit breaker protection component, the circuit breaker protection component turns on the circuit breaker protection. At this time, the wire is disconnected from the power supply, so that the wire is no longer electrically connected to the power supply, and the temperature of the wire gradually decreases, which greatly reduces the risk of spontaneous combustion caused by the connection between the wire and the power supply, improves the safety factor of the electric vehicle circuit system, and reduces the safety hazards of the electric vehicle circuit system.

[0026] 2. The present application integrates the circuit breaker protection components on the busbar, which greatly shortens the distance between the vehicle power supply and the circuit breaker protection components compared to the method of installing the circuit breaker protection components on the wires. After the circuit breaker protection components are disconnected, the wires are directly disconnected from the vehicle power supply, so that the wires are no longer electrically connected to the vehicle power supply, which is conducive to the natural cooling of the wires and buys time for the natural cooling of the wires.

[0027] 3. The present application adopts bolt connection to connect and fix the busbar connector and the fuse, so that after the fuse blows, the maintenance personnel can reuse the busbar connector, that is, reinstall a new fuse between the two busbar connectors, thereby improving the utilization rate of the busbar connector and reducing the waste of resources.

[0028] 4. The present application further improves the insulation performance of the fuse and the connection between the fuse and the two busbar connectors by providing a shell on the insulating connection seat and the outside of the fuse, while also avoiding damage to the insulation layer when the fuse blows, and avoiding burning through the insulation layer when the fuse blows. At the same time, the insulating shell can also provide space for cooling the blown fuse, so that the fuse can be better cooled naturally, greatly reducing the risk caused by the fuse blowing.

[0029] 5. The present application improves the stability of the mica tape wrapped around the busbar joint by setting double-sided tape to bond and fix the edge of the mica tape, and reduces the risk of the mica tape wrapped around the insulating shell, the insulating connecting seat and the two busbar joints becoming detached. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is the background technology figure in this application.

[0031] Figure 2 It is a schematic diagram of the overall structure of the electric vehicle power output busbar in the embodiment of the present application.

[0032] Figure 3 It is an exploded view of the busbar connector and the insulating connector in the embodiment of the present application.

[0033] Figure 4 yes Figure 2 Exploded view (the insulation layer and double-sided tape are hidden).

[0034] Explanation of the reference numerals: 100, power output busbar; 1, busbar connector; 11, connection end; 12, free end; 2, insulating connection seat; 3, circuit breaker protection component; 31, screw; 32, nut; 33, gasket; 41, upper cover; 42, lower cover; 5, insulation layer; 6, double-sided tape. DETAILED DESCRIPTION

[0035] The present application is further described in detail below in conjunction with the accompanying drawings.

[0036] The embodiment of the present application discloses an electric vehicle power output busbar.

[0037] Reference Figures 2 to 4 The electric vehicle power output busbar includes a busbar connector 1, an insulating connector 2, a circuit breaker protection component 3, an insulating shell and an insulating layer 5.

[0038] There are two busbar connectors 1, and the two busbar connectors 1 are used to connect the output terminals and wires of the onboard power supply of the electric vehicle respectively. Both busbar connectors 1 can be connected to the output terminals or wires. One end of the busbar connector 1 is a connection end 11, and the other end is a free end 12, wherein the connection end 11 is used to connect the output terminal or wire.

[0039] Refer to 3 and Figure 4 The insulating connection seat 2 is used to connect and fix two busbar connectors 1. The insulating connection seat 2 is arranged between the two busbar connectors 1. The two ends of the insulating connection seat 2 are respectively fixedly connected to the free ends 12 on the two busbar connectors 1. Specifically, the free end 12 of the busbar connector 1 can be inserted into the insulating connection seat 2, and then the free end 12 of the busbar connector 1 is fixed to the insulating connection seat 2 with screws, pins or rivets, thereby completing the connection and fixation between the insulating connection seat 2 and the two busbar connectors 1. In this embodiment, the insulating connection seat 2 can be made of plastic material, and the insulating connection seat 2 and the two busbar connectors 1 are integrally injection molded. The insulating connection seat 2 covers the middle part of the busbar connector 1, leaving only the connection end 11 and the free end of the busbar connector 1 exposed.

[0040] In other embodiments, the insulating connection base 2 may also be made of other insulating hard materials.

[0041] Reference Figure 3 and Figure 4 The circuit breaker protection component 3 is also arranged between the two busbar connectors 1. The circuit breaker protection component 3 is used to electrically connect the two busbar connectors 1. Specifically, the two ends of the circuit breaker protection component 3 are electrically connected to the free ends 12 of the two busbar connectors 1 respectively, wherein the circuit breaker protection component 3 can be plugged or clamped and fixed on the insulating connecting seat 2.

[0042] In this embodiment, the circuit breaker protection component 3 is a fuse, and the two ends of the fuse are detachably connected and fixed to the two busbar connectors 1, wherein the detachable connection and fixation include but are not limited to plug-in, clamping, riveting, threaded connection and bolt connection, and specifically, the fuse is connected to the free ends 12 of the two busbar connectors 1 by bolts. The bolt connection includes a screw 31, a nut 32 and a gasket 33, wherein the screw 31 is inserted through the free end 12 of the busbar connector 1 and one end of the fuse, the nut 32 is threadedly connected to the screw 31, and the gasket 33 is sleeved on the screw 31, and the gasket 33 is located between the nut 32 and the fuse and the insulating connection seat 2, wherein the gasket 33 can be a self-locking gasket to improve the stability of the connection between the bolted busbar connector 1 and the fuse.

[0043] In other feasible embodiments, the circuit breaker protection component 3 may also adopt other components capable of implementing circuit breaker protection, such as a miniature air switch.

[0044] Reference Figure 3 and Figure 4 The insulating housing is disposed outside the fuse, the insulating connection seat 2 and the free ends 12 of the two busbar connectors 1, and the insulating housing can be fixedly connected to the insulating connection seat 2. Specifically, the insulating housing includes an upper cover 41 and a lower cover 42, and the upper cover 41 and the lower cover 42 are detachably fixedly connected, wherein the detachable fixed connection includes but is not limited to plugging, snapping, etc. In this embodiment, the upper cover 41 and the lower cover 42 are plugged, and the upper cover 41 and the lower cover 42 are respectively located on both sides of the insulating connection seat 2 and the fuse.

[0045] Reference Figure 2 and Figure 3 , the insulating layer 5 is wrapped around the insulating shell, the insulating connection seat 2 and the outside of the two busbar joints 1 to insulate the busbar. In this embodiment, the insulating layer 5 is made of mica tape, and the mica tape is wrapped from the connection end 11 of one busbar joint 1 along the busbar joint 1, the insulating shell and the other busbar joint 1 to the connection end 11 of the other busbar joint 1. In order to make the mica tape better connected at the edge of the connection end 11 of the busbar joint 1, a double-sided tape 6 is also wrapped around the connection end 11 of the busbar joint 1, wherein the double-sided tape 6 can also be wrapped around the edge of the insulating connection seat 2, and the edge of the mica tape is wrapped on the double-sided tape 6, so that the edge of the mica tape is bonded and fixed to the edge of the connection end 11 of the busbar joint 1.

[0046] The embodiment of the present application also discloses an electric vehicle circuit system, which includes an on-board power supply, the electric vehicle power supply output busbar disclosed in the above embodiment, wires, and a load.

[0047] The connection end 11 of one of the busbar connectors 1 of the electric vehicle power output busbar recorded in the above embodiment is fixedly connected to the output terminal of one of the batteries of the vehicle power supply, and the connection end 11 of the other busbar connector 1 can be fixedly connected to a wire or to the output terminal of other batteries of the vehicle power supply.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electric vehicle power output busbar, characterized in that: include: Two busbar connectors, used to connect power supply and wires respectively; The insulating connection seat has two ends respectively fixedly connected to the two busbar connectors, is located between the two busbar connectors, and is used to connect and fix the two busbar connectors; A circuit breaker protection component, both ends of which are fixedly and electrically connected to the two busbar connectors, and is located between the two busbar connectors; and The insulating layer is wrapped around the insulating connection base, the circuit breaker protection components and the outside of the two busbar connectors.

2. The electric vehicle power output busbar according to claim 1, characterized in that: The circuit breaker protection component is a fuse.

3. The electric vehicle power output busbar according to claim 2, characterized in that: The fuse is detachably fixedly connected to the two busbar connectors.

4. The electric vehicle power output busbar according to claim 3, characterized in that: The fuse is connected to the two busbar connectors via bolts.

5. The electric vehicle power output busbar according to claim 4, characterized in that: A screw rod is inserted through the fuse and the busbar joint, a nut is threadedly connected to the bolt, a gasket is sleeved on the screw rod, and the gasket is located between the fuse and the nut.

6. The electric vehicle power output busbar according to claim 1, characterized in that: It also includes an insulating shell, which is arranged on the outside of the insulating connection seat and the circuit breaker protection component, and the insulating shell is fixedly connected to the insulating connection seat.

7. The electric vehicle power output busbar according to claim 6, characterized in that: The insulating shell comprises an upper cover and a lower cover, the upper cover is plugged with the lower cover, and the upper cover and the lower cover are respectively located on two sides of the insulating connecting seat and the fuse.

8. The electric vehicle power output busbar according to claim 6, characterized in that: The insulating layer is a mica tape, and the mica tape is wrapped around the insulating connection seat, the insulating shell and the outside of the two busbar joints.

9. The electric vehicle power output busbar according to claim 1, characterized in that: The edge of the busbar joint is wrapped with a double-sided adhesive tape for bonding the edge of the mica tape.

10. An electric vehicle circuit system, characterized in that: An electric vehicle power output busbar comprising any one of claims 1 to 9.

Images