Temperature management system and temperature fuse thereof

Abstract

The utility model provides a temperature management system and a temperature fuse thereof, and relates to the technical field of fuses. The temperature fuse comprises a shell provided with a first cavity and a second cavity, a temperature sensing assembly arranged in the first cavity, a fuse wire arranged in the second cavity, a first electrode piece connected to one end of the temperature sensing assembly and one end of the fuse wire respectively, and a second electrode piece connected to the other end of the temperature sensing assembly and the other end of the fuse wire respectively. The first cavity is provided with special resin; arc extinguishing particles are distributed in the second cavity; the temperature sensing assembly comprises a temperature sensing conductor or at least two temperature sensing conductors which are connected in series through a connecting conductor. According to the temperature fuse, quick response and protection to temperature and current abnormity in a battery temperature management system are realized, and the safety and reliability of the system are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fuse, specifically, relates to a temperature management system and temperature fuse thereof. BACKGROUND

[0002] The battery temperature management system of the electric vehicle is crucial to the battery performance and the driving distance of the vehicle, and the temperature fuse plays a key role. When the temperature management system is out of control and the heating temperature exceeds the set value, the temperature fuse needs to be fused to cut off the heating circuit for safety.

[0003] However, the prior art has many problems. Ordinary temperature fuses mostly rely on special grease tension to break the alloy to disconnect the circuit. Under the condition of direct current high voltage and large current, the disconnection speed is slow, in seconds, which cannot meet the millisecond requirement, and the instantaneous arc energy impact may cause the product to burst. Moreover, the special grease cooling arc extinguishing ability is limited, and the arc extinguishing ability is poor, which cannot meet the actual application requirement. In addition, the insulation withstand voltage of the product after disconnection is insufficient, and there is a risk of breakdown under high voltage. In summary, the conventional temperature fuse has been difficult to meet the high requirements of the new energy market. SUMMARY

[0004] The utility model provides a kind of temperature management system and temperature fuse thereof, to improve at least one of the above technical problems.

[0005] To solve the above technical problems, the utility model provides a kind of temperature fuse, which includes the shell with first chamber and second chamber, temperature sensing component arranged in the first chamber, fuse arranged in the second chamber, first electrode piece connected to one end of the temperature sensing component and fuse respectively, and second electrode piece connected to the other end of the temperature sensing component and fuse respectively. The first chamber is provided with special resin. The second chamber is provided with arc extinguishing particles. The temperature sensing component includes a temperature sensing conductor, or at least two temperature sensing conductors connected in series using a connecting conductor.

[0006] As a further scheme of the utility model, the resistance of the temperature sensing conductor is lower than the resistance of the fuse, the melting point of the temperature sensing conductor is lower than the melting point of the fuse, and the melting point of the special resin is not higher than the melting point of the temperature sensing conductor. When the working temperature of the temperature fuse is lower than the melting point of the temperature sensing conductor, the current of the temperature sensing conductor is greater than the current of the fuse, and when the working temperature of the temperature fuse is higher than the melting point of the temperature sensing conductor, the temperature sensing conductor is fused first to make the current flow through the fuse and then the fuse is fused.

[0007] As a further scheme of the utility model, the length of the second chamber is longer than the length of the first chamber. The length of the fuse is longer than the length of the temperature sensing conductor. Wherein, the length of the fuse is 1.2 to 4 times of the length of the temperature sensing conductor.

[0008] The temperature sensing assembly is arranged along the length direction of the first chamber in the first chamber. The fuse is arranged along the length direction of the second chamber in the second chamber. The length direction of the first chamber and the length direction of the second chamber are configured as the same direction.

[0009] As a further scheme of the utility model, the temperature fuse further comprises an arc extinguishing member. The arc extinguishing member is adapted to cooperate with the first chamber to at least wrap part of the temperature sensing conductor.

[0010] The first chamber is provided with a first arc extinguishing rib. The arc extinguishing member is provided with a second arc extinguishing rib. The first arc extinguishing rib and the second arc extinguishing rib form a conductor passage for the temperature sensing conductor to pass through.

[0011] As a further scheme of the utility model, a plurality of first arc extinguishing ribs are arranged at intervals in the first chamber. A plurality of second arc extinguishing ribs are arranged at intervals in the arc extinguishing member. The plurality of first arc extinguishing ribs and the plurality of second arc extinguishing ribs correspond one by one.

[0012] The connecting conductor is provided with a first connecting groove for being connected to the temperature sensing conductor. The connecting conductor is arranged between two first arc extinguishing ribs.

[0013] The first electrode member is provided with a second connecting groove for being connected to the temperature sensing conductor. The second electrode member is provided with a third connecting groove for being connected to the temperature sensing conductor.

[0014] As a further scheme of the utility model, the temperature fuse further comprises a first cover plate. The first cover plate is adapted to cooperate with the second chamber to cover the fuse. The first cover plate is provided with a first electrode hole for the first electrode member to pass through, and a second electrode hole for the second electrode member to pass through.

[0015] At least part of the first electrode member is configured to extend to the first electrode hole along a side of the first cover plate away from the second chamber.

[0016] As a further scheme of the utility model, the first cover plate is further provided with a particle filling hole for filling the arc extinguishing particles into the second chamber.

[0017] The particle filling hole is connected with the second electrode hole.

[0018] The temperature fuse further comprises a second cover plate for sealing the particle filling hole.

[0019] The first cover plate is provided with a plurality of protrusions away from one side of the second chamber.

[0020] As a further aspect of the present application, the housing further comprises a third chamber and a fourth chamber. The first electrode member extends from the third chamber to the first chamber and the second chamber to engage one end of the temperature sensing assembly and the fuse. The second electrode member extends from the fourth chamber to the first chamber and the second chamber to engage the other end of the temperature sensing assembly and the fuse.

[0021] The temperature fuse further comprises a first electronic wire and a second electronic wire. At least part of the first electronic wire is embedded in the third chamber to engage the first electrode member. At least part of the second electronic wire is embedded in the fourth chamber to engage the second electrode member.

[0022] As a further aspect of the present application, the temperature fuse further comprises an epoxy resin arranged at the openings of the first chamber, the second chamber, the third chamber and the fourth chamber.

[0023] The arc extinguishing particles are quartz sand, ceramic particles or mica.

[0024] The temperature sensing conductor is an alloy type temperature fuse.

[0025] The present application further provides a temperature management system comprising the temperature fuse according to any one of the first aspect.

[0026] By adopting the above technical solution, the present application can achieve the following technical effects:

[0027] The temperature fuse of the present application realizes rapid response and protection of temperature and current abnormalities in a battery temperature management system, improves the safety and reliability of the system. By optimizing the structural layout of the temperature sensing assembly and the fuse, enhancing the arc extinguishing capability, improving the sealing performance and improving the insulation withstand voltage capability, the present technology effectively prevents the risks of battery overheating and arc generation, prolongs the battery life, and ensures the safe operation of electric vehicles under various conditions. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the specific embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0029] Figure 1 is an isometric view of the temperature fuse.

[0030] Figure 2 is an exploded view of the temperature fuse.

[0031] Figure 3 is an exploded view of the internal conductive elements of the temperature fuse (including the first electrode piece, the second electrode piece, the temperature sensing assembly, and the fuse).

[0032] Figure 4 is an isometric view of the housing.

[0033] Figure 5 is an isometric view of the first cover plate.

[0034] Figure 6 is an isometric view of the second cover plate.

[0035] Figure 7 is an isometric view of the arc extinguishing piece.

[0036] Figure 8 is an isometric view of the internal conductive elements of the temperature fuse.

[0037] Figure 9 is an isometric view of the first electrode piece.

[0038] Figure 10 is an isometric view of the second electrode piece.

[0039] Figure 11 is an isometric view of the temperature sensing assembly.

[0040] Figure 12 is an isometric view of the temperature fuse of Example Two.

[0041] Figure 13 is a first exploded view of the temperature fuse of Example Two.

[0042] Figure 14 is a second exploded view of the temperature fuse of Example Two.

[0043] Markings in the figure: 1-shell, 2-fuse, 3-first electrode member, 4-first cover, 5-epoxy resin, 6-second cover, 7-arc extinguishing member, 8-temperature sensing component, 9-second electrode member, 10-first electronic wire, 11-second electronic wire, 12-first arc extinguishing rib, 13-third chamber, 14-first chamber, 15-second chamber, 16-fourth chamber, 17-second electrode hole, 18-particle filling hole, 19-protrusion, 20-first electrode hole, 21-second arc extinguishing rib, 22-first limiting portion, 23-second limiting portion, 24-second connecting groove, 25-third limiting portion, 26-fourth limiting portion, 27-third connecting groove, 28-connecting conductor, 29-temperature sensing conductor, 30-first connecting groove, 31-first shell, 32-second shell, 33-third shell. DETAILED DESCRIPTION

[0044] 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 with reference to 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. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the utility model for which protection is sought, but merely represents the selected embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0045] Example 1: Figures 1 to 11 As shown, an embodiment of the present invention provides a thermal fuse, which includes a housing 1 having a first chamber 14 and a second chamber 15, a temperature sensing component 8 disposed in the first chamber 14, a fuse 2 disposed in the second chamber 15, a first electrode 3 respectively joined to one end of the temperature sensing component 8 and the fuse 2, and a second electrode 9 respectively joined to the other end of the temperature sensing component 8 and the fuse 2. The first chamber 14 is provided with a special resin. The second chamber 15 is provided with arc-extinguishing particles. The first and second electrodes are formed by a stamping and shaping process.

[0046] The temperature sensing assembly 8 comprises at least two temperature sensing conductors 29 arranged in series, and a connecting conductor 28 connecting two adjacent temperature sensing conductors 29. The two or more temperature sensing conductors 29 arranged in series have the following advantages: 1. The voltage at each break point is reduced, thereby reducing the arcing point energy and extinguishing the arc more quickly. 2. The arcing point is increased, the arc length is increased, more arc energy is consumed, and the arc is extinguished more quickly. 3. The multi-break point mode improves the insulation withstand voltage of the product. Preferably, the fuse 2 is formed by multiple sections in series, thereby obtaining the same arc extinguishing effect as the temperature sensing assembly 8.

[0047] In the embodiment, the temperature sensing conductor 29 is a low-resistance material sensitive to temperature. When the temperature sensing conductor 29 reaches a specified temperature, it melts into a liquid state and shrinks into a ball on both sides under the tension of a special resin, thereby breaking the circuit. The fuse 2 is a high-resistance material sensitive to current. When the circuit exceeds a specified current value, the fuse 2 melts and breaks due to high internal resistance and rapid temperature rise, and the circuit is broken more quickly under the combined action of internal tension and arc extinguishing particles.

[0048] Preferably, the temperature sensing conductor 29 is an alloy type temperature fuse. The alloy type temperature fuse (ATCO) is a low-melting point fusible alloy used as a temperature sensing material. When abnormally heated and reaching a predetermined melting temperature, the fusible alloy melts and quickly shrinks to both ends of the pin under the action of a special resin (i.e., a fluxing agent), thereby breaking the circuit. Depending on different formulations, the weight percentage composition of the fluxing agent can be: rosin: 60%-80%, shrinkage agent: 5%-15%, activator: 5%-15%, and curing agent: 4%-8%. The fluxing agent (i.e., the special resin) is a prior art material, and those skilled in the art can select the specific specifications as needed. The utility model does not make specific limitations on the composition and production steps of the fluxing agent, but only requires that the melting point of the special resin is lower than that of the temperature sensing conductor 29.

[0049] The temperature fuse of the utility model, by setting the first chamber 14 and the second chamber 15, and the layout of the temperature sensing assembly 8 and the fuse 2, can quickly respond when the temperature is abnormal, cut off the circuit by the melting of the temperature sensing conductor 29, effectively prevent the battery from overheating, and improve the safety and reliability of the battery temperature management system.

[0050] On the basis of the above-mentioned embodiments, in an optional embodiment of the utility model, the resistance of the temperature sensing conductor 29 is lower than the resistance of the fuse 2, the melting point of the temperature sensing conductor 29 is lower than the melting point of the fuse 2, and the melting point of the special resin is not higher than the melting point of the temperature sensing conductor 29, so that when the working temperature of the temperature fuse is lower than the melting point of the temperature sensing conductor 29, the current of the temperature sensing conductor 29 can be greater than the current of the fuse 2, and when the working temperature of the temperature fuse is higher than the melting point of the temperature sensing conductor 29, the temperature sensing conductor 29 can be fused first to make the current flow through the fuse 2 and then the fuse 2 is fused.

[0051] Preferably, the melting point of the special resin is lower than the melting point of the temperature sensing conductor 29, so that the special resin is melted before the temperature sensing conductor 29 is melted, and better surface tension is provided for the disconnection of the temperature sensing conductor 29. By designing the resistance and the melting point of the temperature sensing conductor 29 to be lower than those of the fuse 2, it is ensured that when the working temperature is lower than the melting point of the temperature sensing conductor 29, the temperature sensing conductor 29 can bear a greater current and work normally, and when the temperature exceeds the melting point, the temperature sensing conductor 29 is fused first before the fuse 2, so that fast response and protection are realized, and the risk of battery damage caused by abnormal temperature is reduced. Moreover, when the temperature sensing conductor 29 is fused, the current is transmitted through the fuse 2, so that an arc is avoided at the temperature sensing conductor 29, and the safety hazard caused by the arc in the prior art is eliminated.

[0052] On the basis of the above-mentioned embodiments, in an optional embodiment of the utility model, as shown in Figures 2 to 4 , and Figure 8 The length of the fuse 2 is longer than the length of the temperature sensing conductor 29. The length of the fuse 2 is 1.2 to 4 times the length of the temperature sensing conductor 29.

[0053] The temperature sensing assembly 8 is arranged in the first chamber 14 along the length direction of the first chamber 14. The fuse 2 is arranged in the second chamber 15 along the length direction of the second chamber 15. The length direction of the first chamber 14 and the length direction of the second chamber 15 are configured in the same direction.

[0054] In an optional scheme, the temperature sensing conductor 29 is 12 mm long, and the fuse 2 is 33 mm long. The length of the fuse 2 is 2.75 times the length of the temperature sensing conductor 29. In another optional scheme, the temperature sensing conductor 29 is 19.4 mm long (effective length: 17.74 mm), and the length of the fuse 2 is 30 mm. The length of the fuse 2 is 1.55 times (effective length multiple: 1.69) the length of the temperature sensing conductor 29. The effective length is the length of the temperature sensing assembly 8 between the first electrode 3 and the second electrode 9, and does not include the length welded to the first electrode 3 and the second electrode 9.

[0055] The utility model discloses a length of second chamber 15 and fuse 2 is adjusted, and the structural design of temperature fuse is optimized. Effectively increase the resistance of fuse 2, make the current that reduces from fuse 2 when temperature is normal, and after the temperature sensing assembly 8 is disconnected, can more fastly heat and burn off, disconnect power supply rapidly, reduce the security risk of temperature fuse and improve the response speed of temperature fuse.

[0056] On the basis of the above embodiment, an optional embodiment of the utility model discloses a temperature fuse further includes arc extinguishing piece 7. Figure 2 And Figure 7 As shown in the figure, the arc extinguishing piece 7 is suitable for cooperating with the first chamber 14 to at least wrap part of the temperature sensing conductor 29. The first chamber 14 is provided with a first arc extinguishing rib 12. The arc extinguishing piece 7 is provided with a second arc extinguishing rib 21. The first arc extinguishing rib 12 and the second arc extinguishing rib 21 form a conductor passage for the temperature sensing conductor 29.

[0057] The second arc extinguishing rib 21 of the arc extinguishing piece 7 and the first arc extinguishing rib 12 of the first chamber 14 abut and completely wrap the temperature sensing conductor 29. In the case that the arc extinguishing effect of the fuse 2 is not ideal, the temperature sensing conductor 29 can be cut off and the arc can be cooled by the first arc extinguishing rib 12 and the second arc extinguishing rib 21, which plays a second guarantee structure design of auxiliary arc extinguishing. By increasing the arc extinguishing piece 7 and the corresponding arc extinguishing rib design, the utility model strengthens the arc extinguishing capacity of the temperature fuse. This structure can effectively wrap the temperature sensing conductor 29, reduce the risk of arc generation, and improve the stability and safety of the battery temperature management system.

[0058] Preferably, the first chamber 14 is provided with a plurality of first arc extinguishing ribs 12. The arc extinguishing piece 7 is provided with a plurality of second arc extinguishing ribs 21. The plurality of first arc extinguishing ribs 12 and the plurality of second arc extinguishing ribs 21 correspond one by one.

[0059] In the embodiment, the number of the first arc extinguishing rib 12 and the arc extinguishing rib is 4, and in other embodiments, it can be set to 1, 2 or other numbers. The utility model further optimizes the arc extinguishing effect by arranging a plurality of arc extinguishing ribs and connecting conductors 28. This design not only improves the arc extinguishing efficiency, but also enhances the structural stability and reliability of the product.

[0060] On the basis of the above embodiment, an optional embodiment of the utility model discloses a temperature fuse further includes arc extinguishing piece 7. Figure 2 、 Figure 5 As shown in the figure, the arc extinguishing piece 7 is suitable for cooperating with the first chamber 14 to at least wrap part of the temperature sensing conductor 29. The first chamber 14 is provided with a first arc extinguishing rib 12. The arc extinguishing piece 7 is provided with a second arc extinguishing rib 21. The first arc extinguishing rib 12 and the second arc extinguishing rib 21 form a conductor passage for the temperature sensing conductor 29. Figure 6As shown, the temperature fuse further comprises a first cover plate 4. The first cover plate 4 is adapted to cooperate with the second chamber 15 to enclose the fuse 2. The first cover plate 4 is provided with a first electrode hole 20 for the first electrode piece 3 to pass through, and a second electrode hole 17 for the second electrode piece 9 to pass through.

[0061] At least part of the first electrode piece 3 is configured to extend to the first electrode hole 20 along a side of the first cover plate 4 away from the second chamber 15.

[0062] The shell 1, the first cover plate 4, the arc extinguishing piece 7 and the second cover plate 6 are all ceramic materials. Ceramic materials have good strength and heat conduction performance, so that the arc extinguishing performance and anti-burst performance of the product are better. By designing the first cover plate 4 and the corresponding electrode hole, the utility model improves the assembly convenience and sealing performance of the temperature fuse. This design can effectively prevent the influence of the external environment on the internal components, prolonging the service life of the product.

[0063] On the basis of the above embodiment, as shown in Figure 2 , Figure 4 and Figure 11 The connecting conductor 28 is provided with a first connecting groove 30 for being connected to the temperature sensing conductor 29. The connecting conductor 28 is arranged between the two first arc extinguishing ribs 12. The first electrode piece 3 is provided with a second connecting groove 24 for being connected to the temperature sensing conductor 29. The second electrode piece 9 is provided with a third connecting groove 27 for being connected to the temperature sensing conductor 29.

[0064] The first connecting groove 30, the second connecting groove 24 and the third connecting groove 27 are all arc-shaped grooves. Preferably, they are semicircular grooves. By using semicircular grooves, the contact area with the temperature sensing conductor 29 can be increased, ensuring firm connection and reducing the resistance at the connection.

[0065] In addition, the first electrode piece 3 is provided with a first connecting end for being connected to the fuse 2 through the first electrode hole 20, a first limiting part 22 adapted to be clamped outside the first electrode hole 20, and a second limiting part 23 adapted to be clamped to the shell 1. The second limiting part 23 is used to be clamped to the cavity wall between the first chamber 14 and the second chamber 15, and to be clamped to the cavity wall between the first chamber 14 and the third chamber 13.

[0066] The second electrode is provided with a second connecting end for being connected to the other end of the fuse 2 through the second electrode hole 17, a third limiting part 25 adapted to be clamped outside the second electrode hole 17, and a fourth limiting part 26 adapted to be clamped to the shell 1. The fourth limiting part 26 is used to be clamped to the cavity wall between the first chamber 14 and the second chamber 15.

[0067] In the above embodiment, one of the optional embodiments of the utility model for, as Figure 2 And Figure 5 As shown in the figure, the first cover plate 4 is also provided with a particle filling hole 18 to fill the arc extinguishing particles into the second chamber 15. The particle filling hole 18 is connected with the second electrode hole 17. The temperature fuse further comprises a second cover plate 6 to seal the particle filling hole 18.

[0068] The utility model sets up the particle filling hole 18 in the first cover plate 4, which can ensure the integrity of the shell 1. By setting the particle filling hole 18 and the second cover plate 6, the filling and fixing of arc extinguishing particles are optimized. This design not only improves the arc extinguishing efficiency, but also enhances the sealing and protection ability of the product.

[0069] In the above embodiment, one of the optional embodiments of the utility model for, as Figure 2 And Figure 4 As shown in the figure, the shell 1 further comprises a third chamber 13 and a fourth chamber 16. The first electrode piece 3 extends from the third chamber 13 to the first chamber 14 and the second chamber 15 and is connected to one end of the temperature sensing assembly 8 and the fuse 2. The second electrode piece 9 extends from the fourth chamber 16 to the first chamber 14 and the second chamber 15 and is connected to the other end of the temperature sensing assembly 8 and the fuse 2.

[0070] The temperature fuse further comprises a first electronic wire 10 and a second electronic wire 11. At least part of the first electronic wire 10 is embedded in the third chamber 13 to be connected to the first electrode piece 3. At least part of the second electronic wire 11 is embedded in the fourth chamber 16 to be connected to the second electrode piece 9.

[0071] By increasing the third chamber 13 and the fourth chamber 16 and the design of the corresponding electrode piece and the electronic wire, the utility model provides a more flexible electrical connection mode. This design makes the temperature fuse better adapt to different battery temperature management systems, improves the applicability and flexibility of the product. In other embodiments, the first electronic wire 10 and the second electronic wire 11 can not be additionally connected, but an outwardly extending connecting part can be provided on the first electrode piece 3 and the second electrode piece 9 to connect external devices or plug-in parts.

[0072] On the basis of the above-mentioned embodiments, in an alternative embodiment of the utility model, the temperature fuse further comprises epoxy resin 5 arranged at the openings of the first chamber 14, the second chamber 15, the third chamber 13 and the fourth chamber 16. The first cover plate 4 is provided with a plurality of protrusions 19 on the side away from the second chamber 15 to increase the contact area with the epoxy resin 5 and improve the connection firmness. Preferably, the arc extinguishing particles are quartz sand, ceramic particles or mica.

[0073] The utility model uses epoxy resin 5 and specific arc extinguishing particle materials to improve the insulation performance and arc extinguishing capacity of the temperature fuse. This design enables the product to maintain stable performance under high voltage conditions and reduces the safety risk.

[0074] In the embodiment, the connection between the temperature sensing conductor 29 and the connecting conductor 28, the connection between the first electronic wire 10 and the first electrode 3, the connection between the first electrode 3 and the fuse 2, the connection between the first electrode 3 and the temperature sensing conductor 29, the connection between the second electronic wire 11 and the second electrode 9, the connection between the second electrode 9 and the fuse 2, and the connection between the second electrode 9 and the temperature sensing conductor 29 are all resistance welding, electric soldering or laser welding. In other embodiments, existing welding methods such as friction welding can also be used, and the utility model does not make specific limitations on this.

[0075] In the temperature fuse of the utility model embodiment, the temperature sensing assembly 8 and the fuse 2 are connected in parallel. Based on the parallel shunt principle, when the loop passes through the working current or the rated current, the current divided by the fuse 2 is extremely small due to the large internal resistance of the fuse 2, and at this time, the current is basically passed through the temperature sensing assembly 8.

[0076] When the external environment exceeds the set value, the temperature sensing conductor 29 melts and shrinks into a ball on both sides under the joint action of the special resin, thereby breaking. At the moment when the temperature sensing conductor 29 breaks, the current flows through the fuse 2 circuit, so that no arc is generated at the moment when the alloy breaks, thereby avoiding the problem of insufficient arc extinguishing capacity of ordinary temperature fuses using special resin to assist circuit breaking.

[0077] When the current passes through the fuse 2, the fuse 2 melts rapidly due to its large internal resistance, and the quartz sand quickly occupies the area between the fuse 2 breaking points under the action of its own gravity, thereby cutting off the arc. The gap between the quartz sands separates the arc. The second cavity is filled with quartz sand, which transmits the arc energy, reduces the temperature of the arc starting point, thereby weakening the arc thermal ionization effect and assisting in extinguishing the arc. This avoids the problem of slow breaking speed and long arc burning time of ordinary temperature fuses using special resin to assist circuit breaking.

[0078] Specifically, the arcing point at the moment of disconnecting the temperature conductor 29 is transferred from the cavity of the temperature conductor 29 to the second cavity, and is disconnected by using a high-resistance material sensitive to current to generate heat rapidly and melt, and is rapidly extinguished by using arc-extinguishing quartz sand with high thermal conductivity and strong arc-extinction performance. The problems of slow disconnection speed and continuous arcing during disconnection of the ordinary temperature fuse with only special resin to assist disconnection are solved.

[0079] In the second embodiment, the temperature fuse of the temperature management system is provided, and the principle and the technical effects are the same as those of the first embodiment. The contents not mentioned in the first embodiment can be referred to the first embodiment.

[0080] As shown in Figure 1 , 2 and Figure 4 , the shell 1 in the first embodiment is an integrated structure. As shown in Figures 11 to 13 , in the present embodiment, the shell 1 is provided in a split structure as a first shell 31, a second shell 32 and a third shell 33. The first shell 31 is provided with the first cavity 14. The second shell 32 is provided with the second cavity 15. The third shell 33 is provided with the third cavity 13 and the fourth cavity 16. Preferably, the third cavity 13 and the fourth cavity 16 are designed as an integrated total cavity.

[0081] The temperature sensing assembly 8 includes a temperature conductor 29 and is embedded in the first cavity 14. The fuse 2 is embedded in the second cavity 15. The first electrode 3 extends into the first cavity 14 and the second cavity 15, respectively, and is connected to one end of the temperature conductor 29. The second electrode 9 extends into the first cavity 14 and the second cavity 15, respectively, and is connected to the other end of the temperature conductor 29. Then, the first shell 1, the second shell 1, the first electrode 3 and the second electrode 9 are embedded in the total cavity of the third shell 1, and then the epoxy resin 5 is poured into the total cavity.

[0082] Specifically, although only one temperature conductor 29 is provided, because the fuse 2 is provided in parallel, when the temperature conductor 29 is disconnected, the current flows through the fuse 2, which can effectively avoid the generation of arc when the temperature conductor 29 is disconnected, or greatly reduce the energy of the arc generated when the temperature conductor 29 is disconnected, thereby greatly improving the safety performance of the temperature fuse.

[0083] Preferably, the second shell 32 and the fuse 2 are combined as an existing resistance type fuse, thereby removing the first cover plate 4 and the second cover plate 6 to reduce the parts and the corresponding assembly and production steps, thereby greatly improving the production efficiency. At this time, the first electrode 3 and the second electrode 9 can also be obtained by stamping / bending the pins of the existing resistance type fuse.

[0084] In one embodiment, the temperature management system includes a temperature fuse as described in any of the embodiments above.

[0085] The utility model discloses a kind of temperature management systems, including a temperature fuse as described in any of the embodiments above.

[0086] The above is only preferred embodiment of the utility model, and is not used to limit the utility model, for the person skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A temperature fuse, characterized in that The temperature fuse comprises a housing (1) provided with a first chamber (14) and a second chamber (15), a temperature sensing assembly (8) arranged in the first chamber (14), a fuse (2) arranged in the second chamber (15), a first electrode (3) connected to one end of the temperature sensing assembly (8) and the fuse (2) respectively, and a second electrode (9) connected to the other end of the temperature sensing assembly (8) and the fuse (2) respectively. The first chamber (14) is provided with special resin, and the second chamber (15) is provided with arc extinguishing particles. The temperature sensing assembly (8) comprises one temperature sensing conductor (29) or at least two temperature sensing conductors (29) connected in series by a connecting conductor (28).

2. A thermal fuse according to claim 1, characterized in that The resistance of the temperature sensing conductor (29) is lower than that of the fuse (2), the melting point of the temperature sensing conductor (29) is lower than that of the fuse (2), and the melting point of the special resin is not higher than that of the temperature sensing conductor (29), so that the current of the temperature sensing conductor (29) is greater than that of the fuse (2) when the working temperature of the temperature fuse is lower than the melting point of the temperature sensing conductor (29), and the temperature sensing conductor (29) is melted first to make the current flow through the fuse (2) and then the fuse (2) is melted when the working temperature of the temperature fuse is higher than the melting point of the temperature sensing conductor (29).

3. A thermal cutoff according to claim 1, wherein The length of the second chamber (15) is longer than that of the first chamber (14), and the length of the fuse (2) is longer than that of the temperature sensing conductor (29), wherein the length of the fuse (2) is 1.2 to 4 times the length of the temperature sensing conductor (29). The temperature sensing assembly (8) is arranged in the first chamber (14) along the length direction of the first chamber (14), the fuse (2) is arranged in the second chamber (15) along the length direction of the second chamber (15), and the length directions of the first chamber (14) and the second chamber (15) are configured in the same direction.

4. A thermal cutoff according to claim 1, wherein The temperature fuse further comprises an arc extinguishing member (7) adapted to cooperate with the first chamber (14) to at least wrap part of the temperature sensing conductor (29). The first chamber (14) is provided with a first arc extinguishing rib (12), the arc extinguishing member (7) is provided with a second arc extinguishing rib (21), and a conductor passage for the temperature sensing conductor (29) is formed between the first arc extinguishing rib (12) and the second arc extinguishing rib (21).

5. A thermal fuse according to claim 4, wherein The first chamber (14) is provided with a plurality of first arc extinguishing ribs (12) at intervals, the arc extinguishing member (7) is provided with a plurality of second arc extinguishing ribs (21) at intervals, and the plurality of first arc extinguishing ribs (12) and the plurality of second arc extinguishing ribs (21) correspond one by one. The connecting conductor (28) is provided with a first connecting groove (30) for connecting to the temperature sensing conductor (29), and the connecting conductor (28) is arranged between two first arc extinguishing ribs (12). The first electrode piece (3) is provided with a second connecting groove (24) engaged with the temperature sensing conductor (29); the second electrode piece (9) is provided with a third connecting groove (27) engaged with the temperature sensing conductor (29).

6. A thermal cutoff according to claim 1, wherein The temperature fuse further comprises a first cover plate (4) adapted to cooperate with the second chamber (15) to enclose the fuse (2); the first cover plate (4) is provided with a first electrode hole (20) for the first electrode piece (3) to pass through, and a second electrode hole (17) for the second electrode piece (9) to pass through; At least part of the first electrode piece (3) is configured to extend to the first electrode hole (20) along a side of the first cover plate (4) away from the second chamber (15).

7. A thermal cutoff according to claim 6, wherein The first cover plate (4) is further provided with a particle filling hole (18) for filling the arc extinguishing particles into the second chamber (15); The particle filling hole (18) is connected with the second electrode hole (17); The temperature fuse further comprises a second cover plate (6) for sealing the particle filling hole (18); The side of the first cover plate (4) away from the second chamber (15) is provided with a plurality of protrusions (19).

8. A thermal fuse according to any one of claims 1 to 7, characterised in that The housing (1) further comprises a third chamber (13) and a fourth chamber (16); the first electrode piece (3) extends from the third chamber (13) to the first chamber (14) and the second chamber (15) to engage one end of the temperature sensing assembly (8) and the fuse (2); the second electrode piece (9) extends from the fourth chamber (16) to the first chamber (14) and the second chamber (15) to engage the other end of the temperature sensing assembly (8) and the fuse (2); The temperature fuse further comprises a first electronic wire (10) and a second electronic wire (11); at least part of the first electronic wire (10) is embedded in the third chamber (13) to engage the first electrode piece (3); at least part of the second electronic wire (11) is embedded in the fourth chamber (16) to engage the second electrode piece (9).

9. A thermal fuse according to claim 8, wherein The temperature fuse further comprises an epoxy resin (5) arranged at the openings of the first chamber (14), the second chamber (15), the third chamber (13) and the fourth chamber (16); The arc extinguishing particles are quartz sand, ceramic particles or mica; The temperature sensing conductor (29) is an alloy type temperature fuse.

10. A temperature management system characterized by, A temperature fuse comprising any one of claims 1 to 9. A temperature fuse comprising any one of claims 1 to 9.

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