A fireproof structure for fuses in new energy vehicles

Abstract

This utility model discloses a fireproof structure for a fuse in a new energy vehicle. It includes a base and a fireproof cover. The base has a through hole running from front to back. The bottom edges of the left and right sides of the base have slot structures extending along the length direction. The fireproof cover is a thin-walled metal structure wrapped around the top and sides of the base. The fireproof cover is connected to the slot structures via inwardly bent limiting flanges on the left and right sides. The front end of the fireproof cover has a head limiting structure that can engage with the head of the base. The advantages are: the fireproof cover fits tightly against the outer surface of the ceramic base, providing a new layer of safety protection for the fuse. When the fuse arcs due to its own failure or sealant failure, the heat generated will not break through the SUS304 fireproof cover (the melting temperature of stainless steel is 1400-1550℃). Simultaneously, the metal material can dissipate heat quickly, thus preventing the ignition of the plastic base of the PTC device and ensuring the safety of the entire air conditioning system.

Description

Technical Field

[0001] This utility model relates to the structure of fuses for new energy vehicles, and in particular to a fireproof structure for fuses in new energy vehicles. Background Technology

[0002] Thermal protection of the air conditioning unit in new energy vehicles is of paramount importance. With the widespread application of new energy vehicles, their air conditioning systems, as a crucial guarantee of in-vehicle comfort, are of paramount importance in terms of safety and reliability. The air conditioning unit generates heat during operation; without effective thermal protection, internal components may overheat and be damaged, affecting the normal operation of the air conditioning system and potentially causing fires or other safety accidents. The PTC heater, as a vital component of the vehicle's air conditioning heating system, is undeniably important. The fuse, as a crucial protective structure of the PTC heater, is a vital component. When the PTC's electronic control protection measures fail, the fuse, as a key protective element, melts its internal structure when the temperature exceeds the protection set temperature, disconnecting the entire circuit and stopping heating to protect the air conditioning unit from overheating and combustion. Therefore, the fuse's protective structure within the PTC is extremely important. If the design is inadequate, when the fuse arcs due to sealant failure, the resulting high-temperature heat can melt the PTC base, thereby igniting the entire air conditioning unit. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a fireproof structure for fuses in new energy vehicles that does not require fasteners, can ensure that the fuse will not break through and melt the fireproof cover when it is arced under special circumstances, and can provide thermal protection to reduce the risk of fire in the air conditioning unit.

[0004] To solve the above-mentioned technical problems, the fireproof structure of the fuse for new energy vehicles of this utility model includes a base and a fireproof cover. The base has a through hole running through the front and rear. The bottom edge of the left and right sides of the base is provided with a slot structure extending along the length direction. The fireproof cover is a thin-walled metal structure wrapped around the top and sides of the base. The fireproof cover is connected to the slot structure by limiting flanges bent inward on the left and right sides. The front end of the fireproof cover is provided with a head limiting structure that can be engaged with the head of the base.

[0005] The base is made of ceramic material.

[0006] The fireproof cover is made of stainless steel.

[0007] The base has a slot structure consisting of two symmetrically arranged linear guide slots.

[0008] A hollow fuse tube is inserted into the through hole of the base.

[0009] The fuse housing contains a fuse, which includes metal connecting ends on both sides and a fuse wire assembly in the middle.

[0010] Advantages of this utility model:

[0011] (1) The fireproof cover made of SUS304 stainless steel is tightly fitted to the outer surface of the ceramic base, providing a new layer of safety protection for the fuse. When the fuse is arcing due to its own failure or sealant failure, the heat generated will not break through the SUS304 fireproof cover (the melting temperature of stainless steel is 1400-1550℃). At the same time, the metal material can dissipate heat quickly, thereby avoiding ignition of the plastic base of the PTC device and ensuring the safety of the entire air conditioning system.

[0012] (2) The ceramic base and the fireproof cover are precisely matched by the slot structure of the ceramic base and the limiting flange, so that the ceramic base and the fireproof cover do not need to be fastened or glued. They can be quickly assembled and firmly connected by structural matching, which simplifies the installation process and improves the assembly efficiency.

[0013] (3) The front end of the fireproof cover is provided with a head limiting structure that can be locked onto the head of the base, further enhancing the stability and vibration resistance of the overall connection. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the assembly structure of the fireproof fuse structure for new energy vehicles according to this utility model.

[0015] Figure 2 This is a schematic diagram of the base in the fireproof structure of the fuse for new energy vehicles according to this utility model.

[0016] Figure 3 This is a schematic diagram of the fireproof cover in the fireproof structure of the fuse for new energy vehicles according to this utility model.

[0017] Figure 4 This is a schematic diagram of the structure of the fuse tube shell in the fireproof structure of the fuse for new energy vehicles according to this utility model.

[0018] Figure 5 This is a schematic diagram of the fuse in the fireproof structure of the fuse for new energy vehicles according to this utility model. Detailed Implementation

[0019] The fireproof structure of the fuse for new energy vehicles of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. Example

[0020] like Figure 1 As shown, the fireproof structure of the fuse in a new energy vehicle includes a base 1 made of ceramic material and a fireproof cover 2 made of SUS304 stainless steel. Figure 2As shown, the base 1 has a through hole 6 running from front to back inside, and the bottom edges of the left and right side surfaces of the base 1 are provided with slot structures 3 extending along the length direction, such as... Figure 3 As shown, the fireproof cover 2 is a thin-walled metal structure that wraps around the top and sides of the base 1. The fireproof cover 2 is connected to the slot structure 3 by inwardly bent limiting flanges 4 on both the left and right sides. The slot structure 3 consists of two symmetrically arranged linear guide grooves that allow the limiting flanges 4 of the fireproof cover 2 to slide into. The front end of the fireproof cover 2 is provided with a head limiting structure 5 that can engage with the head of the base 1. The slot structure 3 of the base 1 consists of two symmetrically arranged linear guide grooves that allow the limiting flanges 4 of the fireproof cover 2 to slide into, achieving limiting guidance and installation positioning; as shown... Figure 4 As shown, a hollow fuse housing 7 is inserted into the through hole 6 of the base 1. The fuse housing 7 is the outer shell of the internal conductive protection component of the fuse, usually made of high-strength insulating material, used to carry the fuse wire and conductive connection structure, and has heat resistance and arc resistance properties; Figure 5 As shown, a fuse 8 is inserted into the fuse housing 7. The fuse 8 includes metal connection ends 9 on both sides and a fuse assembly 10 in the middle. The fuse assembly 10 is located inside the fuse housing and melts quickly during overcurrent to achieve circuit protection.

[0021] The overall structure, from the inside out, is as follows: the fuse 8 is inserted into the hollow cavity of the fuse housing 7, the fuse housing 7 is embedded in the through hole 6 of the base 1, the base 1 and the fireproof cover 2 are fixedly installed by the mutually cooperating slot structure 3 and the limiting flange 4, and then limited by the head limiting structure 5 of the fireproof cover 2, forming a complete fuse fire protection unit.

Claims

1. A new energy vehicle's fuse fireproof structure, characterized in that: Includes a base (1) and a fireproof cover (2). The base (1) has a through hole (6) that runs through the front and back. The bottom edge of the left and right sides of the base (1) is provided with a slot structure (3) that extends along the length direction. The fireproof cover (2) is a thin-walled metal structure that wraps around the top and sides of the base (1). The fireproof cover (2) is connected to the slot structure (3) by limiting flanges (4) that bend inward on the left and right sides. The front end of the fireproof cover (2) is provided with a head limiting structure (5) that can be engaged with the head of the base (1).

2. The fuse fireproof structure of the new energy vehicle according to claim 1, characterized in that: The base (1) is made of ceramic material.

3. The fuse fireproof structure of a new energy vehicle according to claim 1, characterized in that: The fireproof cover (2) is made of stainless steel.

4. The fuse fireproof structure of a new energy vehicle according to claim 1, characterized in that: The slot structure (3) of the base (1) consists of two symmetrically arranged linear guide slots.

5. The fuse fireproof structure of a new energy vehicle according to claim 1, characterized in that: A hollow fuse tube shell (7) is inserted into the through hole (6) of the base (1).

6. The fuse fireproof structure of the new energy vehicle according to claim 5, characterized in that: The fuse housing (7) contains a fuse (8), which includes metal connection ends (9) on both sides and a fuse assembly (10) in the middle.

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