Active and passive integrated safety device

Abstract

The utility model discloses an active and passive integrated safety device, which belongs to the technical field of circuit protection devices and comprises a shell, an igniter, a piston, an arc extinguish chamber, a conductive loop, an active signal source and a passive signal source, and the active signal source and the passive signal source are used for giving out signals to trigger the igniter to ignite. Impact force generated by the igniter can drive the piston to move towards the direction close to the arc extinguish chamber to a blocking position, so that the conductive loop is cut off by the piston. According to the utility model, the coexistence of passive protection and active protection is realized, the active protection mode does not need to depend on an automobile trip computer, the technical problem of safety leakage of the passive protection is effectively solved, and the two power sources share one set of piston and arc extinguish chamber, so that the size of the device can be reduced, and the cost is reduced. Therefore, the space occupied by the circuit cut-off device can be reduced, and the cost can be reduced.

Description

Technical Field

[0001] This utility model mainly relates to the field of circuit protection device technology, specifically an integrated active and passive insurance device. Background Technology

[0002] Circuit interruption devices are used to quickly cut off circuits and achieve insulation in the event of a safety problem. Currently, circuit interruption devices can be divided into traditional fuses and excitation-triggered fuses; the latter is a device that breaks the electronic circuit after being triggered by an electronic signal, by using a piston to break the conductor to cut off the circuit. For example, patent document CN219979438U discloses a circuit quick-cutting and air-blocking device. The housing contains an igniter, a piston, and a conductor. The conductor passes through the housing, and the igniter and piston are located on the same side of the conductor. The housing also has an arc-extinguishing chamber located on the other side of the conductor. The arc-extinguishing chamber contains an arc-extinguishing body and a partition. The partition divides the arc-extinguishing chamber into multiple arc-extinguishing cavities. Both the partition and the piston have clearance grooves corresponding to each other for mutual insertion. The igniter can drive the piston to move towards the arc-extinguishing body to the blocking state, so that the piston can cut part of the conductor into multiple fragments corresponding to the arc-extinguishing cavities and bring them into the corresponding arc-extinguishing cavities. In the blocking state, the end of the piston near the arc-extinguishing body is inserted into the arc-extinguishing body.

[0003] However, circuit-breaking devices such as those that trigger fuses require the vehicle's computer to perform strategy calculations and then disconnect the battery pack circuit, which can be considered "passive" protection. Furthermore, during vehicle operation, there is a sleep state, and the vehicle's computer may be unable to determine if there is excessive current in the battery pack, potentially leading to an accident. Alternatively, even if the current during operation is not yet at a level requiring the vehicle's computer's detection, a current exceeding a certain value can lead to heat accumulation, causing the vehicle to overheat and potentially resulting in personal injury and property damage.

[0004] While existing technologies exist to address the aforementioned problem by connecting a passive safety device in series with a conventional fuse, this results in a larger footprint and higher costs. Utility Model Content

[0005] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing technologies are too simplistic. It mainly provides an integrated active and passive safety device to solve the technical problem of safety omissions in the "passive" protection mentioned in the background, while also reducing space and cost.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0007] An integrated active and passive safety device includes a housing, within which are disposed an igniter, a piston, an arc-extinguishing chamber, and a conductive circuit. It also includes an active signal source and a passive signal source, both used to provide signals to trigger the igniter's ignition action. The impact force generated by the igniter drives the piston to move towards the arc-extinguishing chamber to a blocking position, causing the piston to cut off the conductive circuit.

[0008] As one implementation of the above scheme, there is one igniter, which is connected to a signal processor. The signal processor can receive active signal sources and passive signal sources (the two signal sources are not received at the same time), and output a signal to trigger the ignition action of the igniter.

[0009] As another implementation of the above scheme, there are two ignition devices, which are used to receive active signal sources and passive signal sources respectively.

[0010] Specifically, the active fuse module is connected to the ignition device via an active trigger lead. When the fuse inside the active fuse module is broken, the active trigger lead and the ignition device are connected, and an active signal source is output.

[0011] Preferably, the active fuse module is built into the housing, and an arc-extinguishing medium is provided in the housing at the position corresponding to the active fuse module.

[0012] Furthermore, the arc-extinguishing medium completely covers the active fuse module.

[0013] Specifically, the active fuse module is connected in series in the conductive circuit.

[0014] Furthermore, the active fuse module is isolated from the ignition area where the igniter is located.

[0015] Furthermore, the trigger response time of the active signal source trigger ignition device is ≤1ms, and the trigger response time of the passive signal source trigger ignition device is ≤2ms.

[0016] Preferably, the arc-extinguishing medium is selected from any one of quartz sand, metal grid sheets, and metal wire.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] (1) This utility model sets up an active signal source and a passive signal source. The passive signal source triggers the ignition device to cut off the conductive circuit by judging the vehicle's computer, thus achieving "passive" protection. The active signal source automatically melts the active fuse module under abnormal current and triggers the ignition device within microseconds to cut off the conductive circuit, thus achieving "active" protection. In this utility model, "passive" protection and "active" protection coexist, and the "active" protection mode does not rely on the vehicle's computer, effectively solving the technical problem of safety omissions in "passive" protection.

[0019] (2) In this utility model, the “active” protection and the “passive” protection share a piston. Compared with the passive protection device connected in series with a traditional fuse, the device volume can be reduced, thereby reducing the space occupied by the circuit cutting device and helping to reduce costs.

[0020] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention in Embodiment 1;

[0022] Figure 2 This is a schematic diagram of cutting off the conductive circuit when the present invention is applied in Embodiment 1; wherein, Figure (a) is a schematic diagram in the "passive" protection mode and Figure (b) is a schematic diagram in the "active" protection mode;

[0023] Figure 3 This is a schematic diagram of the structure of the present invention in Embodiment 2.

[0024] Reference numerals: 100, housing; 10, igniter; 11, active trigger lead; 12, passive trigger lead; 20, piston; 30, arc extinguishing chamber; 30a, arc extinguishing cavity; 31, arc extinguishing body; 40, conductive circuit; 41, broken piece; 42, active fuse module; 50, arc extinguishing medium. Detailed Implementation

[0025] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] Example 1: Please refer to the appendix for details. Figure 1 An integrated active and passive safety device includes a housing 100. An igniter 10, a piston 20, and a conductive circuit 40 are disposed within the housing 100. The conductive circuit 40 laterally penetrates the housing 100. The igniter 10 and the piston 20 are located on the same side of the conductive circuit 40. An arc-extinguishing chamber 30 is also provided within the housing 100 on the other side of the conductive circuit 40, and the arc-extinguishing chamber 30 is filled with an arc-extinguishing body 31. The piston 20, the conductive circuit 40, the arc-extinguishing chamber 30, and their internal structures are all identical to those shown in the patent document with authorization publication number CN219979438U.

[0028] There are two ignition devices 10, and both ignition devices 10 (without signal processor) are located directly above the same piston 20. One ignition device 10 is connected to the passive trigger lead 12 and connected to the vehicle's on-board computer; the other ignition device 10 is connected to the active fuse module 42 through the active trigger lead 11. The active fuse module 42 is connected in series on the conductive circuit 40.

[0029] Please refer to the attached document carefully. Figure 2 After application, when there is an abnormal current in the conductive circuit 40 sufficient to melt the active fuse module 42, the fuse inside the active fuse module 42 breaks; at the same time, within a microsecond, the current flows through the active trigger lead 11 and reaches the corresponding igniter 10 (i.e., generates an active signal source to trigger the igniter 10), causing the igniter 10 to ignite. The resulting impact force drives the piston 20 to move towards the arc-extinguishing chamber 30 to the blocking position, cutting off the pre-cut in the conductive circuit 40. Within milliseconds, the entire conductive circuit 40 is cut off. The piston 20 cuts part of the conductive circuit 40 into multiple fragments 41 corresponding to the arc-extinguishing chamber 30a and brings them into the corresponding arc-extinguishing chamber 30a, protecting the entire equipment from damage by abnormal current. This is considered "active" protection.

[0030] When the vehicle's computer detects an abnormal current, it energizes the corresponding ignition device 10 through the passive trigger lead 12 (i.e., generates a passive signal source to trigger the ignition device 10), thereby driving the piston 20 to cut off the conductive circuit 40, which is considered "passive" protection.

[0031] The aforementioned dual-power redundancy mechanism ensures the reliability of this device under complex operating conditions.

[0032] The aforementioned "passive" protection and "active" protection share a set of piston 20 and arc-extinguishing chamber 30. Compared with the passive protection device connected in series with a traditional fuse, the device size can be reduced, thereby reducing the space occupied by the circuit cutting device and helping to reduce costs.

[0033] In addition, the two ignition devices 10 serve as the power source for "passive" protection and "active" protection respectively, resulting in higher safety. The product is stable, and there are no high or low installation requirements at the left and right ends, so the installation requirements are not high.

[0034] In this embodiment, the active trigger lead 11 is located inside the housing 100, which can provide a stable and reliable contact solution.

[0035] In this embodiment, the active fuse module 42 is located in a cavity of the housing 100, and the cavity is provided with an arc-extinguishing medium 50 that completely covers the active fuse module 42, so that the insulation capacity at the initial fuse point meets the product performance and safety requirements.

[0036] In this embodiment, the active fuse module 42 is isolated from the ignition area where the igniter 10 is located, which can avoid the adverse effects between the two.

[0037] In this embodiment, the arc-extinguishing medium 50 is quartz sand.

[0038] Example 2: The difference between this example and Example 1 is that:

[0039] In this embodiment, please refer to the appendix for details. Figure 3 The housing 100 contains only one ignition device 10, which is connected to a signal processor. Both the active trigger lead 11 and the passive trigger lead 12 are connected to the signal processor.

[0040] In this embodiment, the arc-extinguishing medium 50 is a metal grid.

[0041] The rest is the same as in Example 1.

[0042] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. An integrated active and passive safety device, comprising a housing (100), wherein an igniter (10), a piston (20), an arc-extinguishing chamber (30), and a conductive circuit (40) are disposed within the housing (100), characterized in that: An active signal source and a passive signal source are provided, both of which are used to give signals to trigger the ignition device (10) to ignite. The impact force generated by the ignition device (10) can drive the piston (20) to move towards the arc-extinguishing chamber (30) to the blocking position, so that the piston (20) cuts off the conductive circuit (40).

2. The active-passive integrated safety device according to claim 1, characterized in that: There is one igniter (10). The igniter (10) is connected to the signal processor. The signal processor can receive active signal sources and passive signal sources and output signals to trigger the ignition action of the igniter (10).

3. The active-passive integrated insurance device according to claim 1, characterized in that: There are two ignition devices (10), which are used to receive active signal sources and passive signal sources respectively.

4. The active-passive integrated safety device according to claim 1, characterized in that: The active fuse module (42) is connected to the ignition device (10) via an active trigger lead (11). When the fuse inside the active fuse module (42) is broken, the active trigger lead (11) and the ignition device (10) are connected, and an active signal source is output.

5. The active-passive integrated insurance device according to claim 4, characterized in that: The active fuse module (42) is built inside the housing (100), and the housing (100) is provided with an arc extinguishing medium (50) at the corresponding position of the active fuse module (42).

6. The active-passive integrated insurance device according to claim 5, characterized in that: The arc-extinguishing medium (50) completely covers the active fuse module (42).

7. The active-passive integrated safety device according to claim 4, characterized in that: The active fuse module (42) is connected in series on the conductive circuit (40).

8. The active-passive integrated insurance device according to claim 4, characterized in that: The active fuse module (42) is isolated from the ignition area where the ignition device (10) is located.

9. The active-passive integrated insurance device according to claim 1, characterized in that: The trigger response time of the active signal source trigger igniter (10) is ≤1ms, and the trigger response time of the passive signal source trigger igniter (10) is ≤2ms.

10. A combined active and passive safety device according to claim 5 or 6, characterized in that: The arc-extinguishing medium (50) is selected from any one of quartz sand, metal grid sheet, and metal wire.

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