Igniters and Hybrid Generators

Abstract

The present invention relates to the technical field of gas generators, and in particular, to an igniter and a hybrid generator. The igniter includes a base, a shell, an ignition bridge wire, a first ignition electrode, a second ignition electrode, and a resistance detection element; the shell is connected to the base, and the shell and the base jointly define a housing cavity; the ignition bridge wire is accommodated in the housing cavity, and the ignition bridge wire is electrically connected to the first ignition electrode and the second ignition electrode; the resistance detection element is accommodated in the housing cavity, and the first ignition electrode is electrically connected to the resistance detection element; the resistance detection element is used to electrically connect to the second ignition electrode when the shell is deformed, so that the resistance value between the first ignition electrode and the second ignition electrode is the parallel value of the resistance of the resistance detection element and the resistance of the ignition bridge wire. The igniter can judge whether the gas pressure in the hybrid generator is within the normal range according to the difference in resistance value, and then judge whether the hybrid generator is in a normal state.

Description

Technical Field

[0001] The present invention relates to the technical field of gas generators, and in particular to an igniter and a hybrid generator. Background Art

[0002] Airbags are very important passive safety devices in cars. They can deploy airbags in a short time after a collision accident to reduce the degree of injury to passengers. When a car collides, the sensor senses and determines the degree of collision of the car. The controller determines the signal of the sensor and sends an ignition signal, turns on the gas generator to quickly fill the airbag. After the airbag is deployed, the impact acceleration of the passengers is reduced, thereby achieving the purpose of protecting the safety of the passengers in the car. The gas generator is a key component in the airbag system. It is mainly divided into pyrotechnic generators, hybrid generators and cold air generators. The hybrid generator and cold air generator are filled with high-pressure gas. The hybrid generator is filled with high-pressure inert gas. When working, after the two ignition electrodes of the generator igniter are energized, the internal bridge wire heats up and ignites the agent, outputting high-temperature flames or ions, so that the total pressure inside the generator exceeds the bursting pressure of the bursting disc, so that the bursting exhaust is output to the airbag. It has significant advantages such as low gas temperature, less residue, and fast startup speed, and is widely used in the field of automobile airbags.

[0003] However, the service life of the generator for automobile airbags is 15 years, and after the hybrid generator is installed in the vehicle, it is impossible to detect whether the internal high-pressure gas pressure is in a normal state. Summary of the invention

[0004] The purpose of the present invention includes, for example, providing an igniter and a hybrid generator, which can determine whether the gas pressure in the hybrid generator is within a normal range based on different resistance values, and further determine whether the hybrid generator is in a normal state.

[0005] The embodiments of the present invention can be implemented as follows:

[0006] In a first aspect, the present invention provides an igniter, the igniter comprising a base, a shell, an ignition bridge wire, a first ignition electrode, a second ignition electrode and a resistance detection element;

[0007] The shell is connected to the base, and the shell and the base jointly define a receiving cavity; the ignition bridge wire is received in the receiving cavity, and the ignition bridge wire is electrically connected to the first ignition electrode and the second ignition electrode;

[0008] The resistance detection element is accommodated in the accommodating cavity, and the first ignition electrode is electrically connected to the resistance detection element; the resistance detection element is used to be electrically connected to the second ignition electrode when the shell is deformed, so that the resistance value between the first ignition electrode and the second ignition electrode is the parallel value of the resistance of the resistance detection element and the resistance of the ignition bridge wire.

[0009] In an optional embodiment, the shell is made of an electrical conductor material, and the second ignition electrode is electrically connected to the shell; the resistance detection element is used to abut against the shell when the shell is deformed, so that the resistance detection element is electrically connected to the second ignition electrode.

[0010] In an optional embodiment, the igniter further comprises a medicine box, an ignition agent and an electrode seat; the electrode seat and the medicine box are both made of an electrical conductor material; the medicine box is accommodated in the accommodating cavity, and the ignition agent, the ignition bridge wire and the electrode seat are all accommodated in the medicine box;

[0011] The second ignition electrode is electrically connected to the electrode holder, and the shell is electrically connected to the second ignition electrode through the medicine box and the electrode holder; the ignition bridge wire is electrically connected to the first ignition electrode and the electrode holder.

[0012] In an optional embodiment, the igniter further includes an enhancement agent contained in the cartridge, the enhancement agent being configured to react when the ignition bridge wire generates heat.

[0013] In an optional embodiment, along the axis direction of the shell, there is a gap between the end of the medicine box away from the base and the shell;

[0014] Part of the resistance detection element is accommodated in the medicine box and is electrically connected to the first ignition electrode, and the remaining part of the resistance detection element is located in the spacing area between the medicine box and the shell and is spaced from the shell;

[0015] The portion of the resistance detection element located in the gap between the medicine box and the shell is used to abut against the deformed shell.

[0016] In an optional embodiment, along the axial direction of the shell, part of the outer circumference of the medicine box is provided with an abutting portion abutting against the inner circumference of the shell, and the rest of the outer circumference of the medicine box is spaced apart from the shell.

[0017] In an optional embodiment, along the axial direction of the shell, a first arc-shaped portion is provided at one end of the shell away from the base, and the first arc-shaped portion is recessed toward the accommodating cavity.

[0018] In an optional embodiment, along the axial direction of the shell, the outer peripheral surface of the shell is provided with a second arc-shaped portion, and the second arc-shaped portion is recessed toward the accommodating cavity.

[0019] In an optional embodiment, the resistance detection element is an elastic member.

[0020] In a second aspect, the present invention provides a hybrid generator, which includes a main body and the above-mentioned igniter; the igniter is connected to the main body, and the main body contains high-pressure inert gas;

[0021] The first ignition electrode and the second ignition electrode are both used to be electrically connected to a vehicle control system to detect the resistance between the first ignition electrode and the second ignition electrode, or to control the operating temperature of the ignition bridge wire.

[0022] The beneficial effects of the embodiments of the present invention include:

[0023] The igniter includes a base, a shell, an ignition bridge wire, a first ignition electrode, a second ignition electrode and a resistance detection element; the shell is connected to the base, and the shell and the base jointly define a receiving cavity; the ignition bridge wire is received in the receiving cavity, and the ignition bridge wire is electrically connected to the first ignition electrode and the second ignition electrode; the resistance detection element is received in the receiving cavity, and the first ignition electrode is electrically connected to the resistance detection element; the resistance detection element is used to be electrically connected to the second ignition electrode when the shell is deformed, so that the resistance value between the first ignition electrode and the second ignition electrode is the parallel value of the resistance of the resistance detection element and the resistance of the ignition bridge wire.

[0024] Therefore, when the shell of the igniter is deformed, the resistance detection element located in the shell will be electrically connected to the second ignition electrode, and because the ignition bridge wire is electrically connected to the first ignition electrode and the second ignition electrode, and the first ignition electrode is electrically connected to the resistance detection element, the resistance detection element and the ignition bridge wire are connected in parallel between the first ignition electrode and the second ignition electrode, thereby making the resistance between the first ignition electrode and the second ignition electrode a parallel value of the resistance of the resistance detection element and the resistance of the ignition bridge wire; when the shell of the igniter is not deformed, the resistance detection element located in the shell is disconnected from the second ignition electrode, and because the ignition bridge wire is electrically connected to the first ignition electrode and the second ignition electrode, the resistance between the first ignition electrode and the second ignition electrode is the resistance of the ignition bridge wire;

[0025] That is, when the shell of the igniter is deformed, the resistance between the first ignition electrode and the second ignition electrode will change, and then it is possible to judge whether the shell is deformed by detecting the resistance between the first ignition electrode and the second ignition electrode. Therefore, it is possible to judge whether the gas pressure in the hybrid generator is within the normal range based on whether the shell is deformed, and then judge whether the hybrid generator is in a normal state. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1This is a schematic diagram of the structure of an igniter in an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of installing an igniter in a hybrid generator according to an embodiment of the present invention;

[0029] Figure 3 It is a structural schematic diagram of the case where the resistance detection element is electrically connected to the second ignition electrode in an embodiment of the present invention;

[0030] Figure 4 It is a schematic diagram of the structure when the resistance detection element is electrically disconnected from the second ignition electrode in an embodiment of the present invention;

[0031] Figure 5 It is a schematic structural diagram of another embodiment of the present invention when the igniter is provided with a first arc-shaped portion;

[0032] Figure 6 It is a structural schematic diagram of the electrical connection between the resistance detection element and the second ignition electrode when the igniter is provided with the first arc-shaped portion in other embodiments of the present invention;

[0033] Figure 7 It is a schematic structural diagram of the electrical connection between the resistance detection element and the second ignition electrode when the igniter is provided with the first arc-shaped portion in other embodiments of the present invention;

[0034] Figure 8 It is a schematic structural diagram of another embodiment of the present invention when the igniter is provided with a first arc-shaped portion and a second arc-shaped portion;

[0035] Fig. 9 It is a structural schematic diagram of the electrical connection between the resistance detection element and the second ignition electrode when the igniter is provided with the first arc-shaped portion and the second arc-shaped portion in other embodiments of the present invention;

[0036] Fig.10 It is a structural schematic diagram of another embodiment of the present invention in which the resistance detection element is electrically disconnected from the second ignition electrode when the igniter is provided with the first arc-shaped portion and the second arc-shaped portion;

[0037] Fig.11 It is a structural schematic diagram of another embodiment of the present invention when the resistance detection element is an elastic member;

[0038] Fig.12 It is a structural schematic diagram of the electrical connection between the resistance detection element and the second ignition electrode when the resistance detection element is an elastic member in other embodiments of the present invention;

[0039] Fig.13 It is a structural schematic diagram of the electrical disconnection between the resistance detection element and the second ignition electrode when the resistance detection element is an elastic member in other embodiments of the present invention.

[0040] Icon: 100-igniter; 110-base; 120-shell; 130-ignition bridge wire; 140-first ignition electrode; 150-second ignition electrode; 160-resistance detection element; 101-accommodating chamber; 171-medicine box; 172-ignition agent; 173-electrode seat; 174-enhancing agent; 175-abutment portion; 176-first arc portion; 177-second arc portion; 200-hybrid generator; 210-main body. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0042] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0044] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0045] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0046] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0047] Please refer to Figure 1-Figure 4 , this embodiment provides an igniter 100, the igniter 100 includes a base 110, a housing 120, an ignition bridge wire 130, a first ignition electrode 140, a second ignition electrode 150 and a resistance detection element 160;

[0048] The housing 120 is connected to the base 110, and the housing 120 and the base 110 together define a receiving chamber 101; the ignition bridge wire 130 is received in the receiving chamber 101, and the ignition bridge wire 130 is electrically connected to the first ignition electrode 140 and the second ignition electrode 150;

[0049] The resistance detection element 160 is accommodated in the accommodating cavity 101, and the first ignition electrode 140 is electrically connected to the resistance detection element 160; the resistance detection element 160 is used to be electrically connected to the second ignition electrode 150 when the shell 120 is deformed, so that the resistance value between the first ignition electrode 140 and the second ignition electrode 150 is the parallel value of the resistance of the resistance detection element 160 and the resistance of the ignition bridge wire 130.

[0050] Please refer to Figure 1-Figure 4 , the working principle of the igniter 100 is:

[0051] The igniter 100 includes a base 110, a shell 120, an ignition bridge wire 130, a first ignition electrode 140, a second ignition electrode 150 and a resistance detection element 160; the shell 120 is connected to the base 110, and the shell 120 and the base 110 jointly define a receiving cavity 101;

[0052] The ignition bridge wire 130 is accommodated in the accommodation cavity 101, and the ignition bridge wire 130 is electrically connected to the first ignition electrode 140 and the second ignition electrode 150; wherein the resistance value of the ignition bridge wire 130 normally ranges from 2Ω±0.2Ω, and heat is generated when current passes through;

[0053] The resistance detection element 160 is accommodated in the accommodating cavity 101, and the first ignition electrode 140 is electrically connected to the resistance detection element 160; the resistance detection element 160 can adopt a low-resistance and high-inductance device to reduce the impact on the ignition current, and the resistance detection element 160 has a resistance value of 2Ω; the resistance detection element 160 is used to be electrically connected to the second ignition electrode 150 when the shell 120 is deformed, so that the resistance value between the first ignition electrode 140 and the second ignition electrode 150 is the parallel value of the resistance of the resistance detection element 160 and the resistance of the ignition bridge wire 130.

[0054] Therefore, when the shell 120 of the igniter 100 is deformed, the resistance detection element 160 located in the shell 120 will be electrically connected to the second ignition electrode 150, and because the ignition bridge wire 130 is electrically connected to the first ignition electrode 140 and the second ignition electrode 150, and the first ignition electrode 140 is electrically connected to the resistance detection element 160, the resistance detection element 160 and the ignition bridge wire 130 are connected in parallel between the first ignition electrode 140 and the second ignition electrode 150, thereby making the first ignition electrode 140 The resistance between the first ignition electrode 140 and the second ignition electrode 150 is the parallel value of the resistance of the resistance detection element 160 and the resistance of the ignition bridge wire 130; when the housing 120 of the igniter 100 is not deformed, the resistance detection element 160 in the housing 120 is electrically disconnected from the second ignition electrode 150, and the ignition bridge wire 130 is electrically connected to the first ignition electrode 140 and the second ignition electrode 150, so that the resistance between the first ignition electrode 140 and the second ignition electrode 150 is the resistance of the ignition bridge wire 130;

[0055] That is, when the shell 120 of the igniter 100 is deformed, the resistance between the first ignition electrode 140 and the second ignition electrode 150 will change, and then it is possible to judge whether the shell 120 is deformed by detecting the resistance between the first ignition electrode 140 and the second ignition electrode 150. Therefore, it is possible to judge whether the gas pressure in the hybrid generator 200 is within a normal range based on whether the shell 120 is deformed, and then judge whether the hybrid generator 200 is in a normal state.

[0056] In summary, please refer to Figure 1-Figure 4 When the igniter 100 is not affected by the high-pressure gas in the hybrid generator 200 or the gas pressure is low, the resistance detection element 160 is electrically disconnected from the second ignition electrode 150, and the resistance between the first ignition electrode 140 and the second ignition electrode 150 is the resistance of the ignition bridge wire 130; when the pressure in the hybrid generator 200 is within a certain range, the igniter 100 is deformed under the action of the pressure, and the shell 120 is deformed, and the resistance detection element 160 is electrically connected to the second ignition electrode 150, and then connected in parallel with the ignition bridge wire 130. The resistance measurement value between the first ignition electrode 140 and the second ignition electrode 150 of the igniter 100 is the parallel value of the resistance of the resistance detection element 160 and the resistance of the ignition bridge wire 130; the vehicle control system determines whether the gas pressure in the hybrid generator 200 is within a normal range based on the difference in resistance values, and then determines whether the hybrid generator 200 is in a normal state.

[0057] Based on the above, please refer to Figure 1-Figure 4 , when the vehicle control system determines whether the gas pressure in the hybrid generator 200 is within the normal range according to the different resistance values ​​(such as Figure 3 As shown, since there is high-pressure gas in the hybrid generator 200, when the pressure of the high-pressure gas is within a specific range, it is in a normal working state. In this state, the pressure of the high-pressure gas will act on the housing 120, so that the resistance detection element 160 and the ignition bridge wire 130 are connected in parallel between the first ignition electrode 140 and the second ignition electrode 150, that is, the resistance measurement value between the first ignition electrode 140 and the second ignition electrode 150 of the igniter 100 is the parallel value of the resistance of the resistance detection element 160 and the resistance of the ignition bridge wire 130. Therefore, it is possible to judge whether the resistance detection element 160 and the ignition bridge wire 130 are connected in parallel through the resistance measurement value between the first ignition electrode 140 and the second ignition electrode 150, and further judge whether the hybrid generator 200 is in a normal state;

[0058] When the pressure of the high-pressure gas is outside a specific range (such as Figure 4 As shown), that is, when the gas pressure is low, the pressure of the high-pressure gas on the shell 120 will decrease, thereby reducing the deformation of the shell 120. At this time, the resistance detection element 160 is electrically disconnected from the second ignition electrode 150, and the resistance between the first ignition electrode 140 and the second ignition electrode 150 is the resistance of the ignition bridge wire 130. Based on this, by detecting the resistance between the first ignition electrode 140 and the second ignition electrode 150, it can be determined whether the pressure of the high-pressure gas is reduced. When it is confirmed that the pressure is reduced, it can be determined that there is an abnormal pressure inside the hybrid generator 200, or there may be a gas leakage problem.

[0059] Furthermore, in this embodiment, the shell 120 is elastic, and the material of the shell 120 can be Inconel 600, which plays the role of sealing high-pressure gas. The top of the shell 120 is a flat plate, which is deformed under the action of high-pressure gas, and the deformation amount changes with the change of gas pressure. Therefore, the shell 120 can be deformed when the external pressure changes; and when the shell 120 is deformed, in order to enable the resistance detection element 160 to be electrically connected to the second ignition electrode 150, the shell 120 is made of an electrical conductor material, and the second ignition electrode 150 is electrically connected to the shell 120; therefore, the resistance detection element 160 is used to abut against the shell 120 when the shell 120 is deformed, so that the resistance detection element 160 is electrically connected to the second ignition electrode 150.

[0060] When setting up the igniter 100, the igniter 100 also includes a medicine box 171, an ignition agent 172 and an electrode seat 173; the electrode seat 173 and the medicine box 171 are both made of an electrical conductor material; the medicine box 171 is accommodated in the accommodating cavity 101, and the ignition agent 172, the ignition bridge wire 130 and the electrode seat 173 are all accommodated in the medicine box 171; the second ignition electrode 150 is electrically connected to the electrode seat 173, and the shell 120 is electrically connected to the second ignition electrode 150 through the medicine box 171 and the electrode seat 173; the ignition bridge wire 130 is electrically connected to the first ignition electrode 140 and the electrode seat 173.

[0061] Thus, when the igniter 100 is in a normal state, the shell 120 is not deformed. At this time, the electric conduction with the first ignition electrode 140 and the second ignition electrode 150 can make the current pass through the ignition bridge wire 130 electrically connected to the first ignition electrode 140 and the second ignition electrode 150, so that when the ignition bridge wire 130 generates heat, the ignition agent 172 reacts chemically under the action of high temperature, generates flames, heat or high-temperature particles, breaks the shell 120, and outputs to the outside. In addition, the igniter 100 also includes an enhancement agent 174 contained in the medicine box 171. The enhancement agent 174 is used to react when the ignition bridge wire 130 generates heat, so as to stimulate the action of the enhancement agent 174 after the ignition agent 172 acts, and generate greater energy output. It should be noted that when configuring the ignition agent 172 and the enhancement agent 174, they can be prepared using materials in the prior art.

[0062] Furthermore, in this embodiment, in order to prevent the shell 120 from causing damage to the structure such as the medicine box 171 in the accommodating cavity 101 during the deformation process, there is a gap between the end of the medicine box 171 away from the base 110 and the shell 120 along the axial direction of the shell 120; and along the axial direction of the shell 120, part of the outer peripheral surface of the medicine box 171 is provided with an abutting portion 175 abutting against the inner peripheral surface of the shell 120, and the remaining outer peripheral surface of the medicine box 171 is spaced from the shell 120.

[0063] Since there is a gap between the end of the medicine box 171 facing away from the base 110 and the shell 120, when the resistance detection element 160 is set, part of the resistance detection element 160 is accommodated in the medicine box 171 and is electrically connected to the first ignition electrode 140, and the remaining part of the resistance detection element 160 is located in the gap area between the medicine box 171 and the shell 120 and is spaced from the shell 120; wherein, the part of the resistance detection element 160 located in the gap between the medicine box 171 and the shell 120 is used to abut against the deformed shell 120.

[0064] In this embodiment, the end of the housing 120 away from the base 110 is a plane in the axial direction of the housing 120; in other embodiments of the present invention, please refer to Figure 5-Figure 7In order to increase the elastic deformation of the housing 120, a first arc portion 176 is provided at one end of the housing 120 away from the base 110 along the axial direction of the housing 120, and the first arc portion 176 is recessed toward the accommodating cavity 101. Figure 8-Figure 10 Along the axial direction of the shell 120 , the outer peripheral surface of the shell 120 is provided with a second arc-shaped portion 177 , and the second arc-shaped portion 177 is recessed toward the accommodating cavity 101 .

[0065] Further, in this embodiment, the resistance detection element 160 is a columnar or strip structure; in other embodiments of the present invention, please refer to Figure 11-13 , the resistance detection element 160 can also be an elastic member.

[0066] Based on the above, please refer to Figure 1-Figure 13 The present invention also provides a hybrid generator 200, which includes a main body 210 and the above-mentioned igniter 100; the base 110 of the igniter 100 is connected to the main body 210, and the main body 210 contains high-pressure inert gas; the first ignition electrode 140 and the second ignition electrode 150 are both used to be electrically connected to the vehicle control system to detect the resistance between the first ignition electrode 140 and the second ignition electrode 150, or to control the working temperature of the ignition bridge wire 130. It should be noted that in the hybrid generator 200, the pressure change in the main body 210 will cause the shell 120 to deform.

[0067] The normal gas pressure range of the high-pressure inert gas inside the hybrid generator 200 is 35MPa-45MPa.

[0068] In summary, during operation, the hybrid generator 200 can be electrically connected to the vehicle control system through the first ignition electrode 140 and the second ignition electrode 150, thereby realizing the detection of the resistance between the first ignition electrode 140 and the second ignition electrode 150, and then judging whether the igniter 100 in the hybrid generator 200 is deformed according to the change of the resistance between the first ignition electrode 140 and the second ignition electrode 150, thereby judging whether the gas pressure in the hybrid generator 200 is within the normal range according to whether the shell 120 is deformed, and then judging whether the hybrid generator 200 is in a normal state.

[0069] Among them, when the igniter 100 is not affected by the high-pressure gas in the hybrid generator 200 or the gas pressure is low, the resistance detection element 160 is electrically disconnected from the second ignition electrode 150, and the resistance between the first ignition electrode 140 and the second ignition electrode 150 is the resistance of the ignition bridge wire 130; when the pressure in the hybrid generator 200 is within a certain range, the igniter 100 is deformed under the action of pressure, and the shell 120 is deformed, and the resistance detection element 160 is electrically connected to the second ignition electrode 150, and then connected in parallel with the ignition bridge wire 130. The resistance measurement value between the first ignition electrode 140 and the second ignition electrode 150 of the igniter 100 is the parallel value of the resistance of the resistance detection element 160 and the resistance of the ignition bridge wire 130; the vehicle control system determines whether the gas pressure in the hybrid generator 200 is within a normal range based on the difference in resistance values, and then determines whether the hybrid generator 200 is in a normal state.

[0070] Specifically, when the pressure of the high-pressure gas in the hybrid generator 200 is greater than 35MPa, the shell 120 is deformed and connected to the resistance detection element 160, and then connected in parallel with the ignition bridge wire 130. The resistance between the first ignition electrode 140 and the second ignition electrode 150 of the igniter 100 is the parallel value of the resistance of the resistance detection element 160 and the resistance of the ignition bridge wire 130, which is about 1Ω; when the igniter 100 is not affected by the high-pressure gas in the hybrid generator 200 or the gas pressure is low, the shell 120 is disconnected from the resistance detection element 160, and the resistance measurement value between the first ignition electrode 140 and the second ignition electrode 150 of the igniter 100 is the resistance value of the ignition bridge wire 130, which is about 2Ω; the vehicle control system determines whether the gas pressure in the hybrid generator 200 is within the normal range by detecting the resistance value between the first ignition electrode 140 and the second ignition electrode 150 of the igniter 100, and then determines whether the hybrid generator 200 is in a normal state.

[0071] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An igniter, characterized in that: The igniter comprises a base, a shell, an ignition bridge wire, a first ignition electrode, a second ignition electrode and a resistance detection element; The shell is connected to the base, and the shell and the base jointly define a receiving cavity; the ignition bridge wire is received in the receiving cavity, and the ignition bridge wire is electrically connected to the first ignition electrode and the second ignition electrode; The resistance detection element is accommodated in the accommodation cavity, and the first ignition electrode is electrically connected to the resistance detection element; the resistance detection element is used to be electrically connected to the second ignition electrode when the shell is deformed, so that the resistance value between the first ignition electrode and the second ignition electrode is the parallel value of the resistance of the resistance detection element and the resistance of the ignition bridge wire; The housing is made of an electrical conductor material, and the second ignition electrode is electrically connected to the housing; the resistance detection element is used to abut against the housing when the housing is deformed, so that the resistance detection element is electrically connected to the second ignition electrode; The igniter further comprises a medicine box, an ignition agent and an electrode seat; the electrode seat and the medicine box are both made of an electrical conductor material; the medicine box is accommodated in the accommodation cavity, and the ignition agent, the ignition bridge wire and the electrode seat are all accommodated in the medicine box; The second ignition electrode is electrically connected to the electrode holder, and the housing is electrically connected to the second ignition electrode through the medicine box and the electrode holder; the ignition bridge wire is electrically connected to the first ignition electrode and the electrode holder; Along the axial direction of the shell, there is a gap between the end of the medicine box away from the base and the shell; Part of the resistance detection element is accommodated in the medicine box and is electrically connected to the first ignition electrode, and the remaining part of the resistance detection element is located in the spacing area between the medicine box and the shell and is spaced from the shell; Wherein, the portion of the resistance detection element located in the interval between the medicine box and the shell is used to abut against the deformed shell; Along the axial direction of the shell, a portion of the outer circumference of the medicine box is provided with an abutting portion abutting against the inner circumference of the shell, and the remaining outer circumference of the medicine box is spaced from the shell; Along the axial direction of the shell, a first arc-shaped portion is provided at one end of the shell away from the base, and the first arc-shaped portion is recessed toward the accommodating cavity.

2. The igniter according to claim 1, characterized in that: The igniter further includes an enhancement agent contained in the medicine box, and the enhancement agent is used to react when the ignition bridge wire generates heat.

3. The igniter according to claim 1, characterized in that: Along the axial direction of the shell, the outer peripheral surface of the shell is provided with a second arc-shaped portion, and the second arc-shaped portion is recessed toward the accommodating cavity.

4. The igniter according to claim 1 or 2, characterized in that: The resistance detection element is an elastic member.

5. A hybrid generator, characterized in that: The hybrid generator comprises a main body and an igniter as claimed in any one of claims 1 to 4; the igniter is connected to the main body, and the main body contains a high-pressure inert gas; The first ignition electrode and the second ignition electrode are both used to be electrically connected to a vehicle control system to detect the resistance between the first ignition electrode and the second ignition electrode, or to control the operating temperature of the ignition bridge wire.

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