Compact excitation fuse structure with conducting bar vertically arranged structure

Abstract

The compact excitation fuse structure with the conducting bars vertically arranged comprises a shell with a cavity, an electronic ignition device and an insulated first piston are arranged in the cavity of the shell, at least one conducting bar is arranged in the shell in a penetrating mode, and when the number of the conducting bars is more than two, the conducting bars are arranged in a mutually insulated mode; the conducting bar is located on the displacement path of the first piston, the width direction of the conducting bar is the same as the displacement direction of the first piston, the conducting bar is connected with a melt in parallel, and the melt is located in the shell; when the electronic ignition device releases high-pressure gas to drive the first piston to move, and the first piston disconnects the conducting bar, the melt is fused. The conducting bar is vertically arranged, and the width of the conducting bar is accommodated by fully utilizing the space in the length direction of the existing shell, so that the width of the product is reduced, and the size of the product is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric power control and electric vehicles, in particular to a compact excitation fuse structure with vertically arranged conductive bars. BACKGROUND

[0002] The excitation fuse is a relatively mature circuit protection device emerging in the market in recent years, and the conductive bar is disconnected by mechanical means. Compared with the traditional thermal fuse, the excitation fuse has the advantages of fast response speed and wide application range. The excitation fuse mainly includes a shell, an electronic ignition device, a piston, a conductive busbar, a fuse structure, a fuse piston knife push plate, and a fuse cutting assembly. A pre-breakage is arranged on the conductive busbar. The electronic ignition device and the piston are located on the same side of the conductive busbar. The piston is arranged corresponding to the pre-breakage of the conductive busbar. The fuse structure, i.e. the fuse cutting assembly, is located on the other side of the conductive busbar. The fuse structure is connected in parallel to the conductive busbar. The fuse cutting assembly is located on the displacement path of the piston. The fuse of the fuse structure passes through the fuse cutting assembly. The fuse piston knife push plate is arranged at one end of the fuse cutting assembly facing the conductive busbar. The width direction of the conductive busbar is perpendicular to the displacement direction of the piston. The fuse structure generally includes a fuse shell, an arc extinguishing medium, and a fuse passing through the arc extinguishing medium. The fuse cutting assembly includes an upper cutting knife and a lower cutting knife. The fuse generally passes through the cooperation surface between the upper cutting knife and the lower cutting knife.

[0003] Since the existing excitation fuse has a horizontally arranged conductive bar, the width direction of the conductive bar is perpendicular to the displacement direction of the piston. When multiple conductive bars are arranged, the width of the excitation fuse must meet the width requirement of the multiple conductive bars, which increases the width of the excitation fuse, thereby increasing the volume of the excitation fuse. At the same time, as the volume increases, the response increases the weight of the excitation fuse product. SUMMARY

[0004] The technical problem to be solved by the present application is to change the arrangement direction of the conductive bar from horizontal to vertical, so that the width direction of the conductive bar is the same as the displacement direction of the piston. The space in the length direction of the shell outside the displacement direction of the piston is fully utilized to accommodate the width of the conductive bar. When the conductive bar is more than two, the conductive bar can be arranged without changing the width and length of the shell.

[0005] To solve the above technical problems, the technical scheme provided by the present application is a compact excitation fuse structure with vertical arrangement structure of conductive row, comprising a shell with a cavity, an electronic ignition device and an insulated first piston are arranged in the cavity of the shell, at least one conductive row is arranged in the shell, when the conductive row is more than two, the conductive rows are insulated from each other; the conductive row is located on the displacement path of the first piston, and the width direction of the conductive row is the same as the displacement direction of the first piston, the conductive row is connected in parallel with a fuse, and the fuse is located in the shell; when the electronic ignition device releases high-pressure gas to drive the first piston to displace, the first piston disconnects the conductive row, and the fuse is blown.

[0006] Preferably, the conductive row comprises two connection ends and at least one conductive row body located between the two connection ends, the conductive row body is integrally connected with the connection end, and the width of the conductive row body is smaller than the width of the connection end.

[0007] Preferably, when the conductive row body is one, a notch is formed in the width direction of the conductive row; when the conductive row is two, the notches of the two conductive rows are arranged away from each other.

[0008] Preferably, when the conductive row body is two, the two conductive row bodies are spaced apart in parallel between the two connection ends, forming a first conductive row branch and a second conductive row branch in parallel on the conductive row, the resistance value of the first conductive row branch is greater than that of the second conductive row branch, the first conductive row branch is arranged towards the direction close to the electronic ignition device, and the second conductive row branch is arranged away from the direction of the electronic ignition device; when the first piston displaces, the first conductive row branch and the second conductive row branch are disconnected.

[0009] Preferably, a third piston is arranged between the first conductive row branch and the second conductive row branch, the third piston corresponds to the second conductive branch; when the first piston displaces, the third piston is driven to displace to disconnect the second conductive branch.

[0010] Preferably, when the conductive row is more than two, the conductive rows are arranged in direct spacing in the displacement direction of the first piston, or are arranged in direct spacing with misalignment.

[0011] Preferably, when the conductive row is more than two and the conductive rows are arranged in direct spacing, an insulated second piston is arranged between the two adjacent conductive rows; the second piston is driven to displace when the first piston displaces, and the first piston and the second piston disconnect the corresponding conductive row; when the conductive row comprises a first conductive row branch and a second conductive row branch, the second piston corresponds to the first conductive row branch.

[0012] Preferably, when the conductive row is more than two and is arranged in staggered intervals, the first piston is provided with an impact end corresponding to the conductive row at one end of the conductive row, and the one end of the first piston towards the conductive row is in a staggered step structure.

[0013] Preferably, the conductive row is provided with a pre-breakage for reducing the mechanical strength of the conductive row, and the conductive row is broken from the pre-breakage.

[0014] Preferably, the pre-breakage is a U-shaped groove, a V-shaped groove or a combined groove provided on one or both sides of the conductive row in the width direction of the conductive row.

[0015] Preferably, the melt is located outside the first piston displacement direction in the shell, and an arc extinguishing medium is filled at the position of the melt, and the arc extinguishing medium is sealed in the shell.

[0016] Preferably, a fuse module is provided in the shell outside the piston displacement direction and on one or both sides of the conductive row, the melt is provided in the fuse module, an arc extinguishing medium is filled in the fuse module, and both ends of the melt are located outside the fuse module and are in conductive connection with the corresponding conductive row.

[0017] Preferably, the fuse module includes a fuse module box, a positioning support, the melt, an arc extinguishing medium, and a fuse module cover, the fuse module cover is arranged on the fuse module box to close the fuse module box to form a fuse module shell, the positioning support is arranged in the fuse module shell, the melt is arranged outside the positioning support, and the arc extinguishing medium is filled in the fuse module shell.

[0018] Preferably, the positioning support is in a T-shaped structure, the melt is arranged around the vertical feature end and the opposite two sides of the T-shaped structure, and is bent out of the fuse module shell from the surface of the horizontal feature of the T-shaped structure; both ends of the fuse module box are open ends, the open ends of the fuse module box are in an L-shaped structure, the fuse module cover is in an L-shaped structure matching the open ends of the fuse module box, the fuse module cover is buckled on the fuse module box, and the melt is pressed tightly at the surface of the horizontal feature of the positioning support.

[0019] Preferably, a sand pouring hole is provided in the closed end of the fuse module box, and the sand pouring hole is closed by a plug.

[0020] The conductive row is arranged vertically, the space of the length direction of the existing shell is fully utilized to accommodate the width of the conductive row, the width of the product is reduced, the volume of the product is reduced, more conductive rows arranged at intervals can be accommodated without increasing the volume of the product, and the simultaneous protection of multiple circuits is realized through a single product.

[0021] The fuse module is provided outside the shell on the outside of the displacement path of the piston, the space of the shell on the outside of the displacement direction of the piston is fully utilized, the space of the shell is maximally utilized without changing the volume of the excitation fuse, the components in the shell are arranged compactly, and the purpose of small volume of the excitation fuse is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a schematic diagram of the principle structure when the conductive row is one-way.

[0023] Figure 2 It is a schematic diagram of the principle structure when the conductive row is one-way.

[0024] Figure 3 It is a schematic diagram of the principle structure when the conductive row is one-way.

[0025] Figure 4 It is a schematic diagram of the principle structure when the conductive row is one-way.

[0026] Figure 5 It is a schematic diagram of the principle structure when the conductive row is one-way.

[0027] Figure 6 It is a schematic diagram of the principle structure when the conductive row is one-way.

[0028] Figure 7 It is a schematic diagram of the principle structure when the conductive row is one-way.

[0029] Figure 8 It is a schematic diagram of the principle structure when the conductive row is one-way.

[0030] Figure 9 It is a schematic diagram of the principle structure when the conductive row is one-way.

[0031] Figure 9-1 It is a schematic diagram of the principle structure when the conductive row is one-way.

[0032] Figure 10 It is a schematic diagram of the principle structure when the conductive row is one-way.

[0033] Figure 11 is a schematic diagram of the cross-sectional structure of the two conductive rows arranged in a front view.

[0034] Figure 12 is a schematic diagram of the cross-sectional structure of the two conductive rows arranged in a side view.

[0035] Figure 13 is a schematic diagram of the structure of the excitation fuse in a front view.

[0036] Figure 14 is a schematic diagram of the structure of the excitation fuse in a side view. Figure 13

[0037] Figure 15 is a schematic diagram of the structure of the excitation fuse in a side view.

[0038] Reference signs:

[0039] support constraint 10, excitation source 1, piston 2, sealing ring 201, first piston 2a, second piston 2b, conductive row 3, connection end 301, conductive row body 302, pre-break 303, fuse 4, fuse module 5, first conductive row 3a, second conductive row 3b, first fuse 4a, second fuse 4b,

[0040] first housing 501, excitation source 502, sealing ring 503, second housing 504, piston 505, first fuse 506, second fuse module cover 507, both ends of the first fuse 506a, first impact end 505a, second impact end 505b, first fuse module cover 508, first conductive row 509, first fuse module box 510, third housing 511, second fuse 512, second conductive row 513, second fuse module box 514, fourth housing 515, positioning bracket 518, sand filling hole 519, first housing 801, excitation source 802, sealing ring 803, second housing 804, piston 805, first fuse 806, second fuse module cover 807, first fuse module cover 808, first conductive row 809, first fuse module box 810, third housing 811, second fuse 812, second conductive row 813, second fuse module box 814, fourth housing 815.

[0041] first housing 901, electronic ignition device 902, sealing ring 903, second housing 904, first piston 905, first fuse 906, second fuse module box 907, first fuse module cover 908, first conductive row 909, first parallel branch 909a, second parallel branch 909b, first fuse module box 910, third housing 911, second fuse 912, second conductive row 913, second fuse module cover 914, fourth housing 915, third piston 916.​ Detailed Implementation

[0042] The present invention relates to a compact, vertically arranged conductive busbar structure for an excitation fuse, comprising a housing with a cavity, an electronic ignition device and an insulated first piston disposed within the cavity of the housing, and at least one conductive busbar passing through the housing. When there are two or more conductive busbars, they are insulated from each other. The conductive busbars are located on the displacement path of the first piston, and the width direction of the conductive busbars is the same as the displacement direction of the first piston. A molten element is connected in parallel to the conductive busbars and is located within the housing. When the electronic ignition device releases high-pressure gas to drive the first piston to displace, the first piston disconnects the conductive busbars, and the molten element melts.

[0043] The present invention provides a compact excitation fuse structure, see below. Figure 1 It mainly includes excitation source 1, piston 2, conductive busbar 3, and melt 4.

[0044] The conductive busbar 3 is supported and fixed by a support constraint. The piston 2 is located in the cavity inside the support constraint and is positioned corresponding to the conductive busbar 3. The excitation source 1 is located at one end of the cavity inside the support constraint. The cavity where the excitation source 1 releases high-pressure gas is connected to the cavity where the piston 3 is located, so that the high-pressure gas released by the excitation source 1 can drive the piston 3 to move towards the conductive busbar 3. The kinetic energy of the piston 3's displacement can cut off the conductive busbar 3. A molten element 4 is connected in parallel to the conductive busbar 3. Under normal operating conditions, current flows through the conductive busbar 3, and the current flowing through the molten element 4 is negligible due to its high resistance. When the conductive busbar 3 is disconnected by the piston 2, the current flows through the molten element 4. The molten element 4 melts and completely disconnects the circuit, achieving circuit protection.

[0045] Figure 1 In the middle, the conductive busbar 3 is arranged vertically, that is, the width direction of the conductive busbar 3 is the same as the displacement direction of the piston 2. See also Figure 2The conductive strip 3 includes two connection ends 301 at both ends and a conductive strip body 302 between the two connection ends 301. The width of the conductive strip body 302 is smaller than the width of the connection end 301, and a gap is formed on the conductive strip 3. Two holes are formed on the connection end 301 of the conductive strip 3 in the length direction and are spaced apart from each other. One of the holes near the conductive strip body 302 is a connection hole for electrically connecting the two ends of the conductive strip 3 to the melt 4, and is located in the support constraint. The other hole away from the conductive strip body 302 is located outside the support constraint and is used as a mounting hole for mounting the fuse structure. Figure 2

[0046] The excitation source 1 is an electronic ignition device that can act according to the received trigger signal (trigger electric signal) and release high-pressure gas as driving force to drive the piston 2 to move. The setting requirement of the excitation source 1 is that the cavity where one end of the excitation source 1 releases high-pressure gas is in communication with the cavity where the other end of the piston 2 away from the conductive strip 3, or they share one cavity, and the communicated cavity or shared cavity is a sealed cavity or has a gap that is insufficient to affect the displacement of the piston 2 and the breaking of the conductive strip 3. Preferably, a sealed cavity is used, for example, a sealing ring 201 is arranged on the outer circumferential surface of the piston 2 in contact with the support constraint to seal the gap between the contact surface of the piston 2 and the support constraint. The piston 2 is made of insulating material, which can pass through the conductive strip gap to isolate the electric arc on both sides of the gap when the conductive strip 3 is single, and when the conductive strip is more than two, the insulating material of the piston can ensure the insulation between the two conductive strips and the insulation after breaking.

[0047] The melt 4 is a conductor provided with a plurality of narrow necks, and its resistance is much larger than that of the conductive strip 3 to ensure that the current flows through the conductive strip 3 in the normal working state. The melt 4 is arranged in the arc-extinguishing medium, and the arc-extinguishing medium is enclosed in the arc-extinguishing chamber in the support constraint, and the melt 4 is arranged in the sealed arc-extinguishing chamber filled with arc-extinguishing medium to form the fuse module 5.

[0048] The support constraint 10 is a sealed shell with insulation performance and certain support strength, and the shell has a cavity. The piston 2 is arranged in the cavity of the shell and can move along the cavity to break the conductive strip 3. ​

[0049] Figure 1 Working principle:

[0050] The excitation source 1 acts according to the received trigger signal (electrical signal) to release high-pressure gas into the sealed cavity in communication with the piston 2, and the high-pressure gas drives the piston 2 to displace as a driving force. The piston 2 breaks the conductive row 3 at the pre-break point 303 of the conductive row 3. Since the conductive row 3 is connected in parallel with the fuse 4, when the conductive row 3 is broken, most of the current flows through the fuse 4, so that when the conductive row 3 is broken, the arc generated at the break point is very small and can be extinguished by air. The current flows through the fuse 4, the fuse 4 is melted, and the generated arc is absorbed by the arc extinguishing medium to achieve arc extinguishing. Since the resistance value of the fuse 4 is much higher than that of the conductive row 3, when the current flows through the fuse 4, the fuse 4 forms a current limiting, so that the amplitude of the current is reduced, and therefore the circuit to be protected is not damaged.

[0051] Figure 1 In the embodiment, the conductive row 3 is provided as one row. In other embodiments, the conductive row can also be provided as two or more rows. When the conductive row is provided as two or more rows, the conductive rows must be insulated from each other.

[0052] The conductive row 3 is provided as two rows, which are a first conductive row 3a and a second conductive row 3b. Referring to FIG. 2, in the displacement direction of the piston, the first conductive row 3a and the second conductive row 3b are both vertically arranged, and the first conductive row 3a and the second conductive row 3b are arranged in parallel and opposite to each other with a spacing therebetween. The first conductive row 3a and the second conductive row 3b are insulated from each other. The notches on the first conductive row 3a and the second conductive row 3b are arranged in opposite directions, so that the structure between the first conductive row 3a and the second conductive row 3b is more compact, and the height of the second piston arranged between the first conductive row and the second conductive row can be reduced. Figure 3 The piston 2 includes a first piston 2a and a second piston 2b. The first piston 2a is arranged corresponding to the pre-break point of the first conductive row 3a, and the second piston 2b is arranged between the first conductive row 3a and the second conductive row 3b and corresponding to the pre-break point of the second conductive row 3b. The compact arrangement of the first conductive row 3a and the second conductive row 3b reduces the height of the second piston arranged between the first conductive row 3a and the second conductive row 3b, thereby reducing the volume and weight of the second piston.

[0053] The outer circumferential surface of the first piston 2a and the second piston 2b in contact with the inner wall of the cavity for supporting and constraining is provided with a sealing ring. The cavity where the end of the first piston 2a away from the conductive row is in communication with the cavity where the end of the excitation source 1 releasing high-pressure gas is formed as a sealed cavity.

[0054] The first conductive row 3a and the second conductive row 3b are respectively connected in parallel with the first fuse 4a and the second fuse 4b. In order to save space, preferably, the first fuse 4a and the second fuse 4b are respectively located outside the piston displacement path of the fuse module, and do not occupy the space at the front end of the piston displacement direction, that is, the length of the excitation fuse structure is not expanded to set the fuse module. While ensuring insulation, the fuse module is installed inside the shell side wall of the excitation fuse structure according to the shell size design of the excitation fuse structure, greatly reducing the internal size, and at the same time, since the fuses are bent in the fuse module, the total length of the fuses is lengthened, the breaking upper limit capacity of the fuses is improved, and therefore, the overall performance of the fuse module is improved.

[0055] In application, the first conductive row 3a and the second conductive row 3b are respectively connected in series with two protection circuit loops for protection. When the excitation source 1 acts according to the received trigger signal, high-pressure gas is released to drive the first piston 2a to displace, the first piston 2a is displaced to disconnect the first conductive row 3a, and the second piston 2b is driven to disconnect the second conductive row 3b. Under the action of the first piston 2a and the second piston 2b, the first conductive row 3a and the second conductive row 3b are disconnected from the pre-disconnection port, the current flows through the first fuse 4a and the second fuse 4b, the narrow neck of the first fuse 4a and the second fuse 4b is melted, and the two circuit loops are completely disconnected, and arc extinction is achieved through arc-extinguishing medium.

[0056] When Figure 3 The excitation fuse structure shown in the figure is used in two-phase circuit or three-phase circuit, and through the distance design between the first piston and the second piston and the conductive row, the two conductive rows can be disconnected at the same time, and the through current of the un-disconnected other phase circuit after the disconnection of one phase circuit is avoided.

[0057] When Figure 3 The excitation fuse structure shown in the figure is used in different circuits, and according to the needs, it can be designed to disconnect at the same time or disconnect in sequence.

[0058] Figure 3The conductive rows shown are two rows, and are arranged in a directly spaced manner. In this arrangement, the space utilization is relatively low. In order to improve the space utilization, the two rows of conductive rows are arranged in a staggered manner in the displacement direction of the piston. In the staggered arrangement, the two rows of conductive rows can be located on the same horizontal plane on one side of the two rows of conductive rows, and the two rows of conductive rows located on the same horizontal plane are arranged in a staggered manner. The two rows of conductive rows are arranged in a staggered manner. When two or more rows of conductive rows are arranged in a staggered manner, the piston 2 is arranged as one, and the corresponding conductive row 3 of the piston 2 is provided with two or more impact ends. The two or more impact ends are of different lengths, forming a staggered stepped structure. The impact end of the stepped structure of the piston 2 can simultaneously disconnect all the conductive rows 3, or can disconnect the conductive rows 3 in sequence by controlling the distance between the impact end and the corresponding conductive row pre-disconnection port.

[0059] The excitation fuse structure of the conductive row arranged in a staggered manner has a smaller volume, a more compact structure, and a higher space utilization than the excitation fuse structure of the conductive row arranged in a directly spaced manner.

[0060] Figure 1 And Figure 3 In the excitation fuse structure, the conductive rows are arranged vertically to improve the breaking stability of the conductive rows, enhance the breaking reliability of the excitation fuse structure, and reduce the volume. The parallel arrangement or parallel staggered arrangement of the multiple conductive rows can be achieved by arranging a piston between the two adjacent conductive rows or designing the impact end of the piston as a stepped structure to simultaneously disconnect the multiple conductive rows. The excitation fuse structure can be applied in a two-phase circuit or a three-phase circuit to improve the functionality of the excitation fuse structure.

[0061] The fuse structure arranged in parallel on the conductive row is arranged outside the displacement path of the piston. The fuse body is designed in a bent structure to shorten the length and volume of the fuse module, fully utilize the space of the side wall of the shell, make the excitation fuse structure more compact, smaller in volume, and improve the breaking capacity.

[0062] Figure 1 And Figure 3 The excitation fuse structure is shown in the schematic structural view. The preferred embodiments are described in detail below in combination with the drawings. The orientation words involved are only based on the orientation shown in the drawings, and do not constitute a limitation on the technical solutions of the present application.

[0063] Referring to Figures 4 to 7The shell comprises a first shell 501, a second shell 504, a third shell 511 and a fourth shell 515 assembled in sequence, and the first shell 501, the second shell 504, the third shell 511 and the fourth shell 515 are fixed by bolt connection. A sealing ring and silica gel are filled between the assembly surfaces of the first shell, the second shell, the third shell and the fourth shell in cooperation to form a sealed shell with excellent sealing performance, which can prevent foreign matter from polluting the fracture and prevent high-temperature arc from spouting out of the shell to damage surrounding devices. The shell formed by assembling the first shell 501, the second shell 504, the third shell 511 and the fourth shell 515 has a cavity communicating from the first shell to the fourth shell.

[0064] The excitation source 502 is fixed in the first shell 501 in a sealed manner, and the signal receiving end of the excitation source 502 is located outside the shell. An electrostatic ring and a connector with a short-circuit ring are arranged at the signal receiving end of the excitation source 502. The first shell 501 is partially shaped to match the shape of the excitation source 502, and together with the electrostatic ring, the displacement of the excitation source 502 is limited. Before the connector at the user end is inserted into place, the short-circuit ring will trigger the pins of the two signal receiving ends of the excitation source 502 to be short-circuited, preventing misoperation during transportation, installation and use.

[0065] The second shell 504 and the third shell 511 communicate with each other and are provided with a piston 505. The first conductive row 509 is vertically arranged at the assembly surface of the second shell 504 and the third shell 511, and the second conductive row 513 is arranged at the assembly surface of the third shell 511 and the fourth shell 515. The first conductive row 509 and the second conductive row 513 are arranged at both ends of the third shell 513 in the displacement direction of the piston and are arranged in a staggered manner. The first conductive row 509 and the second conductive row 513 respectively pass through the cavity in the shell.

[0066] The piston 505 comprises a head and an impact end. The head of the piston 505 is arranged in the cavity of the second shell 504, and at least one sealing ring 503 is arranged on the outer circumferential surface of the head of the piston 505 to form a sealing structure. The sealing ring 503 is located between the head of the piston 505 and the inner wall of the cavity of the second shell 504, and seals the high-pressure gas release end of the excitation source 502 and the end of the head of the piston 505 facing the excitation source 502. A limiting protrusion is arranged at a symmetrical position of the outer circumferential surface of the end of the head of the piston 505 facing the excitation source 502 to form a limiting structure. The limiting protrusion is clamped between the assembly surfaces of the first shell and the second shell to limit the initial position of the piston 505. When the piston 505 is driven by high-pressure gas, the limiting protrusion is disconnected from the piston 505, and the limiting is released.

[0067] The impact end of the piston 505 is designed as a staggered three-step structure. The impact end of the piston 505 includes a first impact end 505a and a second impact end 505b arranged in a staggered stepped manner. The first impact end 505a and the second impact end 505b correspond to the pre-breakage of the first conductive row 509 and the second conductive row 513, respectively. The end of the first impact end 505a and the second impact end 505b is designed as a groove structure, and the bottom of the groove is a cutter structure. In this way, when the first impact end 505a and the second impact end 505b break the corresponding conductive row, the conductive row is located in the groove structure of the first impact end 505a and the second impact end 505b, which can prevent the conductive row from displacing relative to the first impact end 505a and the second impact end 505b when it is cut off.

[0068] The first fuse module and the second fuse module are respectively connected in parallel with the first conductive row 509 and the second conductive row 513. The first fuse module and the second fuse module are respectively located on opposite sides of the first conductive row 509 and the second conductive row 513, and also on opposite sides of the displacement path of the piston 505.

[0069] At the positions close to the first conductive row and the second conductive row at the two ends of the third shell 511 in the displacement direction of the piston, a containing chamber for accommodating the fuse module is respectively formed, and the containing chamber is opened at the end face of the third shell 511 to facilitate the placement of the fuse module. The first fuse module is arranged in the containing chamber at one end of the third shell 511 facing the second shell 504, and the second fuse module is arranged in the containing recess at one end of the third shell 511 facing the fourth shell 515.

[0070] The first fuse module and the second fuse module are the same. Taking the first fuse module as an example, referring to Figures 8 to 10 , the first fuse module box 510 is a box structure, and the two adjacent ends thereof are open ends, so that the open ends of the first fuse module box 510 are L-shaped structures, and the open end in the length direction is closed away from the side adjacent to the open end.

[0071] The fuse module cover 508 is a buckle cover structure of L-shaped structure, which is slidably assembled on the opening end of the first fuse module box 510 of L-shaped structure, and is connected with the first fuse module box 510 in a buckling manner to seal the first fuse module box 510 to form a first fuse module shell. The positioning support 518 is provided in the first fuse module shell and is of T-shaped structure. Positioning ribs are provided on opposite sides of the vertical feature of the positioning support 518. A positioning groove is formed at one end of the vertical feature away from the horizontal feature. Limiting ribs are provided on the outer surface of the horizontal feature of the positioning support 518. The first fuse body 506 is of strip-shaped wire structure. The first fuse body 506 is arranged in the positioning groove at the end of the vertical feature of the positioning support 518. The two ends 506a of the first fuse body 506 are arranged across the positioning ribs on opposite sides of the positioning support 518, are bent at the horizontal feature of the positioning support 518, pass through the outer surface of the horizontal feature on the outer side of the limiting ribs of the positioning support 518, and are arranged between the assembly surfaces of the first fuse module box 510 and the fuse module cover 508 outside the fuse module shell to serve as the connection ends of the first fuse body 506 and the first conductive row 509. The limiting ribs on opposite sides of the vertical feature and at the horizontal feature of the positioning support 518 insulate the two ends of the first fuse body 506 to prevent the first fuse body on opposite sides of the vertical feature of the positioning support from arcing. The limiting groove is arranged on the inner surface of one end of the positioning support 518 corresponding to the limiting rib when the fuse module cover 508 is pressed against the positioning support 518. When the fuse module cover 508 is assembled on the first fuse module box 510, the limiting rib of the positioning support 518 is nested in the limiting groove of the fuse module cover 508 to position the positioning support 518 and press the first fuse body 506 against the outer surface of the horizontal feature of the positioning support 518 on the outer side of the limiting rib.

[0072] The sand pouring hole 519 is formed in the closed end of the first fuse module box 510. The arc extinguishing medium is filled in the first fuse module shell through the sand pouring hole 519. The sand pouring hole 519 is sealed by a plug.

[0073] The second fuse module is provided with a second fuse body 512, a second fuse module cover 507, and a second fuse module box 514.

[0074] The connection mode of the fuse module 5 and the conductive row 3 is shown in Figure 10 The fuse body 4 of the fuse module 5 is electrically connected with the conductive row 3 by a bolt.

[0075] Figures 4 to 7 The working principle of the fuse module 5 is as follows:

[0076] The first conductive row 509 and the second conductive row 513 are respectively connected in series in different circuits, and the current flows through the first conductive row 509 and the second conductive row 513 respectively, and the current flowing through the first fuse module and the second fuse module is very small and can be ignored.

[0077] When the excitation source 502 receives the trigger signal (the electric signal sent by the protection system of the user end), the high-pressure gas is released as a driving force to drive the piston 505 to displace against the limiting structure, and the two impact ends of the stepped structure of the piston 505 are simultaneously disconnected from the first conductive row 509 and the second conductive row 513 respectively, and when the first conductive row 509 and the second conductive row 513 are disconnected, the current flows through the first fuse 508 and the second fuse 506, and under the effect of the thermal fusion, the first fuse 508 and the second fuse 506 are fused from the narrow neck, and the arc extinguishing medium absorbs the arc energy generated when the fuses are fused to extinguish the arc.

[0078] The sending of the trigger signal by the protection system of the user end to the excitation source 502 can be sending when the circuit fails, and forcedly cutting off in some cases, such as when the circuit is applied to a new energy vehicle, and the circuit needs to be forcibly disconnected when the new energy vehicle has an accident. The specific triggering condition of sending the trigger signal is designed by the user end according to the protection requirement.

[0079] When two conductive rows are set, the excitation fuse structure can be applied to two-phase fire circuit in a three-phase circuit, and when the three-phase circuit needs to be disconnected, the two-phase fire circuit can be disconnected at the same time.

[0080] On the basis of Figure 4 and Figure 7 , the first conductive row and the second conductive row are arranged in parallel and spaced apart along the displacement direction of the piston. Referring to Figures 11 to 12 , the first shell 801, the second shell 804, the third shell 811 and the fourth shell 815 are fixed and sealed by bolt connection. The excitation source 802 is arranged in the first shell 801.

[0081] The first conductive row 809 and the second conductive row 813 are arranged in parallel and spaced apart along the displacement direction of the piston. The first conductive row 809 is vertically arranged at the assembly surface of the second shell 804 and the third shell 811, and the second conductive row 813 is vertically arranged at the assembly surface of the third shell 811 and the fourth shell 815.

[0082] The first piston 805 is arranged in the second shell 804 and corresponds to the first conductive row 809, and the second piston 816 is arranged in the third shell 811 and corresponds to the second conductive row 813. The outer circumferential surface of the first piston 805 is provided with a sealing ring 803, and the sealing structure is formed between the first piston 805 and the inner wall of the cavity of the second shell 804 through the sealing ring 803. The limit protrusions are arranged at the symmetrical positions of the end portions of the first piston 805 and the second piston 816, respectively, and the limit structure limiting the initial positions of the first piston 805 and the second piston 816 is formed by the limit gaps between the assembly surfaces of the shells.

[0083] The first piston 805 and the second piston 816 are both made of insulating materials, and the impact end structures of the first conductive row 809 and the second conductive row 813 are the same, both of which are provided with groove structures, the bottom of the groove structure is provided with a cutter-shaped structure, and the first conductive row 809 and the second conductive row 813 are respectively located in the groove structure of the impact end of the first piston 805 and the second piston 816 corresponding thereto. When the first piston 805 and the second piston 816 are displaced, the cutter-shaped structure at the bottom of the groove structure breaks the first conductive row 809 and the second conductive row 813 corresponding thereto.

[0084] The parallel fuse module of the first conductive row 809 and the second conductive row 813 is the same as the fuse module of Figures 4 to 7 , which is respectively located on one side of the first conductive row 809 and the second conductive row 813 and is located outside the displacement path of the first piston 805 and the second piston 816. The first fuse module in parallel on the first conductive row 809 includes a first fuse module cover 808, a first fuse body 806, and a first fuse module box 810. The second fuse module in parallel on the second conductive row 813 includes a second fuse body 812, a second fuse module cover 807, and a second fuse module box 814.

[0085] Working principle:

[0086] The first conductive row 809 and the second conductive row 813 are respectively connected in series in different circuits, and the current flows through the first conductive row 809 and the second conductive row 813, respectively, and the current flowing through the first fuse module and the second fuse module is very small and can be ignored.

[0087] When the excitation source 802 receives the trigger signal, it releases high-pressure gas as driving force to drive the first piston 805 to overcome the limiting structure and displace. At the same time, the impact end of the first piston 805 drives the second piston 816 to displace synchronously. The cutting knife-shaped structure of the impact end of the first piston 805 and the second piston 816 breaks the first conductive row 809 and the second conductive row 513 at the pre-breaking point of the first conductive row 509 and the second conductive row 513 corresponding thereto. The current flows through the first fuse 806 and the second fuse 812. Under the effect of thermal fusion, the first fuse 806 and the second fuse 812 melt at the narrow neck and completely break the circuit. The arc extinguishing medium in the fuse module absorbs the arc energy generated when the fuse melts to extinguish the arc.

[0088] Figures 11 to 12 The excitation fuse structure can be applied in a three-phase circuit.

[0089] Referring to Figures 13 to 14 , the same as Figure 6 , the shell includes a first shell 901, a second shell 904, a third shell 911, and a fourth shell 915. The electronic ignition device 902 is arranged in the first shell 901, and the first piston 905 is arranged in the second shell 904 and the third shell 911. The first conductive row 909 and the second conductive row 913 are arranged vertically and are arranged in a staggered manner. Referring to Figure 15 , the first conductive row 909 includes a connecting end at both ends of the first conductive row 909 and two conductive row bodies connected in series with the connecting end between the two connecting ends. One of the two conductive row bodies is a first parallel branch 909a, and the other is a second parallel branch 909b. The width of the first parallel branch 909a and the second parallel branch 909b is less than the width of the connecting end. The first parallel branch 909a and the second parallel branch 909b are arranged between the two connecting ends and are connected in series with the connecting end. The first parallel branch 909a and the second parallel branch 909b are arranged in parallel, and the width of the first parallel branch 909a and the second parallel branch 909b is different, i.e., the resistance values are different. Preferably, the resistance value of the first parallel branch 909a is greater than that of the second parallel branch 909b, the first parallel branch 909a is arranged towards the direction close to the electronic ignition device, the second parallel branch 909b is arranged towards the direction away from the electronic ignition device, and the first parallel branch 909a is broken before the second parallel branch 909b.

[0090] Figure 15The advantage of the conductive row structure design is that the resistance value of the first parallel branch 909a of the first conductive row 909 is greater than the resistance value of the second parallel branch 909b, and the resistance value of the first fuse body in parallel therewith is much greater than the resistance of the conductive row. In normal conduction, due to the shunt effect of the parallel circuit, the current of the first parallel branch 909a is smaller than the current of the second parallel branch 909b, and the current passing through the first fuse body is negligible. When the first parallel branch 909a is disconnected, the current passing therethrough is relatively small, so the arc generated when the first parallel branch 909a is disconnected is very small and can be easily extinguished by air. After the first parallel branch 909a is disconnected, the second parallel branch 909b is in parallel with the first fuse body, and the current is shunted through the second parallel branch 909b and the first fuse body 906. Since the resistance of the first conductive row 909 increases after the first parallel branch 909a is disconnected, the parallel resistance of the second parallel branch 909b and the first fuse body increases accordingly, and the total current decreases accordingly. With the disconnection of the second parallel branch 909b, the first fuse body 906 performs the second current limiting due to the resistance value much greater than the resistance value of the first conductive row, and the current passing through the first fuse body 906 is greatly reduced. When the first fuse body 906 is disconnected, the arc generated is relatively small and can be easily extinguished by the arc extinguishing medium. Therefore, by using the conductive row structure design, Figure 15 the arc extinguishing capability of the excitation fuse structure can be further improved.

[0091] The first parallel branch 909a and the second parallel branch 909b each have a pre-disconnection port. The first parallel branch 909a and the second parallel branch 909b are arranged in a spaced-apart and opposite manner in the piston displacement direction, and a third piston 916 is arranged between the first parallel branch 909a and the second parallel branch 909b. The third piston 916 corresponds to the pre-disconnection port on the second parallel branch 909b.

[0092] The first piston 905 has two impact ends arranged in a stepped structure. One of the two impact ends of the first piston 905 corresponds to the first parallel branch 909a of the first conductive row 909, and at the same time, the impact end also corresponds to the third piston 916. The other impact end corresponds to the second conductive row 913.

[0093] A sealing ring 903 is arranged on the outer circumferential surface of the first piston 905 in contact with the second housing 904, for sealing the contact surface between the first piston 905 and the second housing 904. The first piston 905 and the third piston 916 are respectively limited in the initial position by a limiting structure. The limiting structure can be realized by a concave-convex structure or an interference fit.

[0094] The first fuse body 906 is in parallel with the first conductive row 909, and the second fuse body 912 is in parallel with the second conductive row 913. The two ends of the first fuse body 906 are in conductive connection with the two connection ends of the first conductive row 909, and the first parallel branch 909a and the second parallel branch 909b form a parallel relationship, and when the first parallel branch 909a is disconnected first, the first fuse body 906 still maintains the parallel relationship with the second parallel branch 909b. The first fuse body 906 and the second fuse body 912 are respectively arranged in the first fuse module and the second fuse module, the first fuse module includes the first fuse body 906, the first fuse module box 910, and the first fuse module cover 908, and the second fuse module includes the second fuse body 912, the second fuse module box 907, and the second fuse module cover 914.

[0095] Figure 13 and Figure 14 The working principle is as follows:

[0096] In the normal working state, the current mainly flows through the first conductive row 909 and the second conductive row 913.

[0097] When the electronic ignition device is triggered to release high-pressure gas as driving force to drive the first piston 905 to displace the first conductive row 909 and the second conductive row 913 against the limiting structure, the first piston 905 disconnects the first parallel branch 909a and the second conductive row 913 while driving the third piston 916 to displace, and the third piston 916 disconnects the second parallel branch 909b. Whether the disconnection of the second parallel branch 909b and the second conductive row 913 is synchronous or sequential depends on the distance between the first piston, the third piston, the second parallel branch 909b, and the second conductive row 913, and can be synchronous or sequential. After the first conductive row 909 and the second conductive row 913 are disconnected, the first fuse body and the second fuse body are fused.

[0098] Figures 13 to 14 The two conductive rows are arranged in a staggered manner, and one of the two conductive rows is provided with a parallel first parallel branch and a parallel second parallel branch. In some embodiments, two or more staggered conductive rows are arranged, and at least one or all of the conductive rows adopt the structure provided with a parallel first parallel branch and a parallel second parallel branch. The third piston is arranged in parallel with the first parallel branch and the second parallel branch, so that the impact end of the first piston corresponding to the conductive row can drive the third piston to displace.

[0099] In some embodiments, two or more conductive rows are arranged in parallel with intervals, wherein at least one or all of the conductive rows are arranged with a first parallel branch and a second parallel branch in parallel, a third piston is arranged between the first parallel branch and the second parallel branch of the conductive row, a second piston is arranged between the conductive rows, the first piston drives the displacement of the third piston and the second piston, and the displacement of the first piston, the second piston and the third piston disconnects the corresponding conductive row and the first parallel branch and the second parallel branch of the conductive row.

[0100] In some embodiments, when one conductive row is used, the conductive row can also be arranged with a first parallel branch and a second parallel branch in parallel, and an insulating third piston is arranged between the first parallel branch and the second parallel branch in parallel, so that the impact end of the first piston can drive the displacement of the third piston.

[0101] The conductive row structure arranged with a first parallel branch and a second parallel branch in parallel can be flexibly arranged in the excitation fuse structure as needed, but in principle, the fuse on the conductive row in parallel needs to be in parallel with the first parallel branch and the second parallel branch, and after the first parallel branch is disconnected, it still maintains the parallel relationship with the second parallel branch.

[0102] Regardless of the structure of the conductive row, when two or more conductive rows are disconnected at the same time, they can be applied in a three-phase circuit or different circuits. When two or more conductive rows are disconnected in sequence, they are applied in different circuits to protect the circuits accordingly.

Claims

1. A compact vertical arrangement of an electrically conductive bus and an energizing fuse structure, characterized by, The application relates to an electronic ignition device, which comprises a shell with a cavity, an electronic ignition device arranged in the cavity of the shell, an insulating first piston, at least one electrically-conductive row arranged in the shell, and a fuse arranged in parallel on the electrically-conductive row.

2. The energized fuse structure of claim 1, wherein, The electrically-conductive row comprises two connecting ends and at least one electrically-conductive row body arranged between the two connecting ends, the electrically-conductive row body is integrally connected with the connecting ends, and the width of the electrically-conductive row body is smaller than the width of the connecting ends.

3. The energized fuse structure of claim 2, wherein, When the electrically-conductive row body is one, a notch is formed in the width direction of the electrically-conductive row; when the electrically-conductive row is two rows, the notches of the two rows are arranged in opposite directions.

4. The energized fuse structure of claim 2, wherein, When the electrically-conductive row body is two, the two electrically-conductive row bodies are arranged in parallel between the two connecting ends, a first electrically-conductive row branch and a second electrically-conductive row branch are formed in parallel on the electrically-conductive row, the resistance value of the first electrically-conductive row branch is greater than that of the second electrically-conductive row branch, the first electrically-conductive row branch is arranged close to the direction of the electronic ignition device, and the second electrically-conductive row branch is arranged away from the direction of the electronic ignition device; when the first piston is displaced, the first electrically-conductive row branch and the second electrically-conductive row branch are disconnected.

5. The energized fuse structure of claim 4, wherein, A third piston is arranged between the first electrically-conductive row branch and the second electrically-conductive row branch, and the third piston is arranged corresponding to the second electrically-conductive row branch; when the first piston is displaced, the third piston is driven to displace and disconnect the second electrically-conductive row branch.

6. The energizing fuse structure according to any one of claims 1 to 5, characterized in that When the electrically-conductive row is more than two rows, the electrically-conductive rows are arranged in opposite directions in the displacement direction of the first piston, or are arranged in a staggered manner.

7. The energized fuse structure of claim 6, wherein, When the electrically-conductive row is more than two rows and the electrically-conductive rows are arranged in opposite directions, a second insulating piston is arranged between the two adjacent electrically-conductive rows; the second piston is driven to displace when the first piston is displaced, and the first piston and the second piston disconnect the corresponding electrically-conductive row; when the electrically-conductive row comprises a first electrically-conductive row branch and a second electrically-conductive row branch, the second piston is arranged corresponding to the first electrically-conductive row branch.

8. The energized fuse structure of claim 6, wherein, When the electrically-conductive row is more than two rows and is arranged in a staggered manner, one end of the first piston in the direction of the electrically-conductive row is provided with an impact end corresponding to the electrically-conductive row in a one-to-one manner, so that the one end of the first piston in the direction of the electrically-conductive row is in a staggered step-shaped structure.

9. The energized fuse structure of claim 1, wherein, A pre-disconnection notch for reducing the mechanical strength of the electrically-conductive row is arranged on the electrically-conductive row, and the electrically-conductive row is disconnected from the pre-disconnection notch.

10. The energized fuse structure of claim 9, wherein, The pre-disconnection notch is a U-shaped groove, a V-shaped groove or a combined groove arranged on one side or two sides of the electrically-conductive row in the width direction.

11. The energized fuse structure of claim 1, wherein, The fuse is arranged outside the first piston displacement direction in the shell, and an arc-extinguishing medium is filled at the position of the fuse, and the arc-extinguishing medium is sealed in the shell.

12. The energized fuse structure of claim 11, wherein, A fuse module is arranged in the shell outside the piston displacement direction and on one side or both sides of the conductive row, the fuse is arranged in the fuse module, arc extinguishing medium is filled in the fuse module, and both ends of the fuse are electrically connected with the corresponding conductive row outside the fuse module.

13. The energized fuse structure of claim 12, wherein, The fuse module comprises a fuse module box, a positioning support, the fuse, arc extinguishing medium, and a fuse module cover. The fuse module cover is arranged on the fuse module box to close the fuse module box and form a fuse module shell. The positioning support is arranged in the fuse module shell, and the fuse is arranged outside the positioning support. The arc extinguishing medium is filled in the fuse module shell.

14. The energized fuse structure of claim 13, wherein, The positioning support is in a T-shaped structure. The fuse is arranged around the vertical feature end and opposite sides of the T-shaped structure and is bent out of the fuse module shell from the surface of the horizontal feature of the T-shaped structure. Both ends of the fuse module box are open ends, so that the open ends of the fuse module box are in an L-shaped structure. The fuse module cover is in an L-shaped structure matching the open ends of the fuse module box. The fuse module cover is buckled on the fuse module box and presses the fuse at the surface of the horizontal feature of the positioning support.

15. The energized fuse structure of claim 13, wherein, A sand pouring hole is arranged in the closed end of the fuse module box and is closed by a plug.

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