Multi-safety protection high-voltage PTC (Positive Temperature Coefficient) assembly

Abstract

The utility model discloses a multiple safety protection high voltage PTC assembly, comprising a PTC body, the PTC body is connected with an NTC sensor, the other side of the NTC sensor is provided with a temperature controller, the temperature controller is connected with the PTC body, a PTC high voltage loop is connected in series with a fuse, the ground wire contact point is connected with the PTC body, and the PTC body is connected with the PTC body. The NTC sensor, the temperature controller, the fuse and a ground wire contact point are all arranged in the PTC assembly. According to the multi-safety protection high-voltage PTC assembly, electronic protection can be carried out on the PTC body through the NTC sensor and the temperature controller, when electronic protection of the NTC sensor and the temperature controller is abnormal and fails, and the PTC body is continuously heated and rises, the fuse connected in the high-voltage loop in series is triggered to be fused, the high-voltage loop is physically disconnected, and the PTC body is protected. Therefore, the purpose of controlling the continuous temperature rise of the PTC body is achieved. And the use safety of the PTC body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of high - voltage PTC, and particularly to a high - voltage PTC assembly with multiple safety protections. Background Art

[0002] With the development of society, the automotive industry has also developed rapidly. Among them, the PTC heater is an important component in the automotive air - conditioning system and battery management system.

[0003] However, when the existing high - voltage PTC is in use, it is rare to provide double protection for the high - voltage PTC in both electronic and physical aspects, resulting in certain potential safety hazards for the high - voltage PTC under extreme conditions (such as vehicle collision, electronic temperature control failure, etc.). Therefore, we propose a high - voltage PTC assembly with multiple safety protections to solve the above - mentioned problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a high - voltage PTC assembly with multiple safety protections to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high - voltage PTC assembly with multiple safety protections, including: a PTC body, an NTC sensor is connected to the PTC body, a thermostat is arranged on the other side of the NTC sensor, the thermostat is connected to the PTC body, a fuse is connected in series in the PTC high - voltage circuit, a ground - wire contact point is connected to the PTC body, and the NTC sensor, thermostat, fuse and ground - wire contact point are all arranged inside the PTC assembly.

[0007] As a further scheme of the utility model: a first lead wire is arranged inside the PTC assembly, and a second lead wire is arranged on one side of the first lead wire.

[0008] As a further scheme of the utility model: a ground wire is arranged at the connection part of the second lead wire and the PTC body.

[0009] As a further scheme of the utility model: the first lead wire is sheathed with a black corrugated pipe, the end of the black corrugated pipe is sheathed with a heat - shrinkable tube and fixed on the sheath through a tie - strap.

[0010] As a further scheme of the utility model: the second lead wire includes an orange corrugated pipe, an orange heat - shrinkable tube and a black silica gel pad, the orange heat - shrinkable tube is fixed through a tie - strap, and waterproof glue is applied at the position of the end of the orange corrugated high - voltage pipe and the sheath.

[0011] As a further scheme of the utility model: a shielded wire is arranged inside the second lead wire.

[0012] As a further solution of the present utility model: the grounding wire includes a black fiberglass tube.

[0013] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0014] For this multiple safety protection high-voltage PTC assembly, the PTC body can be electronically protected through the NTC sensor and the thermostat. When the electronic protection of the NTC sensor and the thermostat fails abnormally, causing the PTC body to continuously heat up, the fuse connected in series in the high-voltage circuit will be triggered to blow, physically disconnecting the high-voltage circuit to achieve the purpose of controlling the continuous temperature rise of the PTC body; the PTC body is directly connected to the heat dissipation core through the grounding wire to prevent the insulation layer from failing, so as to trigger the vehicle leakage sensor. Through multiple electronic and physical protections, the abnormal heating risk of the PTC body is completely isolated, improving the safety of the PTC body during use, which is quite practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of the present utility model.

[0016] Figure 2 It is a schematic structural diagram of the second lead joint in the present utility model.

[0017] Figure 3 It is a schematic structural diagram of the NTC sensor in the present utility model.

[0018] Wherein: 1. PTC body; 2. NTC sensor; 3. Thermostat; 4. Fuse; 5. Ground wire contact point; 6. With sponge; 7. First lead; 8. Second lead; 9. Grounding wire. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In one embodiment, as Figures 1 - 3 shown, a multiple safety protection high-voltage PTC assembly includes: a PTC body 1, an NTC sensor 2 is connected to the PTC body 1, a thermostat 3 is arranged on the other side of the NTC sensor 2, the thermostat 3 is connected to the PTC body 1, a fuse 4 is arranged at the lower end of the PTC body 1, a ground wire contact point 5 is arranged on one side of the fuse 4, the ground wire contact point 5 is connected to the PTC body 1, a sponge 6 is attached to the outside of the PTC body 1, and the NTC sensor 2, the thermostat 3, the fuse 4 and the ground wire contact point 5 are all arranged inside the PTC assembly; a first lead 7 is arranged on the PTC assembly, and a second lead 8 is arranged on the same side of the first lead 7; a grounding wire 9 is arranged at the connection of the second lead 8 and the PTC body;

[0020] In this embodiment, when the PTC body 1 is in use, the NTC sensor 2 and the thermostat 3 can provide electronic protection for the PTC body 1. When the electronic protection of the NTC sensor 2 and the thermostat 3 fails abnormally, resulting in continuous heating and temperature rise of the PTC body 1, the fuse 4 (fusing temperature 150 °C) connected in series in the high-voltage circuit will trigger fusing, physically disconnecting the high-voltage circuit to achieve the purpose of controlling the continuous temperature rise of the PTC body 1; the PTC body 1 is directly connected to the heat dissipation core through the ground wire 9 to prevent the insulation layer from failing, so as to trigger the vehicle leakage sensor. Through multiple electronic and physical protections, the risk of abnormal heating of the PTC body 1 is completely isolated, improving the safety during the use of the PTC body 1.

[0021] As Figure 1 shown, the first lead 7 includes a black corrugated pipe and a black heat shrinkable tube, and the black heat shrinkable tube is bridged and fixed on the sheath by a cable tie; the second lead 8 includes an orange corrugated pipe, an orange heat shrinkable tube and a black silicone pad. The orange heat shrinkable tube is fixed by a cable tie, and waterproof glue is applied to the end of the orange corrugated pipe; a shielded wire is arranged inside the second lead 8; the ground wire 9 includes a black fiberglass tube; by arranging the first lead 7, the second lead 8 and the ground wire 9, it is convenient to use the PTC body 1.

[0022] The above embodiment discloses a high-voltage PTC assembly with multiple safety protections. When the PTC body 1 is in use, the NTC sensor 2 and the thermostat 3 can provide electronic protection for the PTC body 1. When the electronic protection of the NTC sensor 2 and the thermostat 3 fails abnormally, resulting in continuous heating and temperature rise of the PTC body 1, the fuse 4 (fusing temperature 150 °C) connected in series in the high-voltage circuit will trigger fusing, physically disconnecting the high-voltage circuit to achieve the purpose of controlling the continuous temperature rise of the PTC body 1; the PTC body 1 is directly connected to the heat dissipation core through the ground wire 9 to prevent the insulation layer from failing, so as to trigger the vehicle leakage sensor. Through multiple electronic and physical protections, the risk of abnormal heating of the PTC body 1 is completely isolated, which is quite practical.

[0023] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A multiple safety protection high-voltage PTC assembly, characterized in that, Comprising: A PTC body (1), an NTC sensor (2) is connected to the PTC body (1), a thermostat (3) is arranged on the other side of the NTC sensor (2), the thermostat (3) is connected to the PTC body (1), a fuse (4) is arranged at the lower end of the PTC body (1), a ground wire contact point (5) is arranged on one side of the fuse (4), the ground wire contact point (5) is connected to the PTC body (1), a sponge (6) is attached to the outside of the PTC body (1), and the NTC sensor (2), the thermostat (3), the fuse (4) and the ground wire contact point (5) are all arranged inside the PTC assembly.

2. The multiple safety protection high-voltage PTC assembly according to claim 1, characterized in that, A first lead wire (7) is arranged inside the PTC assembly, and a second lead wire (8) is arranged on one side of the first lead wire (7).

3. The multiple safety protection high-voltage PTC assembly according to claim 2, wherein, A ground wire (9) is arranged at the connection part of the second lead wire (8) and the PTC body (1).

4. The multiple safety protection high-voltage PTC assembly according to claim 2, wherein The first lead wire (7) is sheathed with a black corrugated pipe, and the end of the black corrugated pipe is sheathed with a heat shrinkable tube and fixed to the sheath by a tie strap.

5. The multiple safety protection high-voltage PTC assembly according to claim 2, wherein, The second lead wire (8) comprises an orange corrugated pipe, an orange heat shrinkable tube and a black silica gel pad, the orange heat shrinkable tube is fixed by a tie strap, and waterproof glue is applied to the orange corrugated pipe.

6. The multiple safety protection high-voltage PTC assembly according to claim 2, wherein, A shielded wire is arranged inside the second lead wire (8).

7. The multiple safety protection high-voltage PTC assembly according to claim 3, characterized in that, The ground wire (9) comprises a black glass fiber tube.

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