New energy equipment temperature overheating protection circuit breaker

Abstract

The utility model discloses a new energy equipment temperature overheat protection circuit breaker. The circuit breaker comprises a lower structure pedestal; the upper cover structural member and the lower structural base are arranged at the top of the lower structural base; the contact piece assembly is arranged in a space formed by the lower structure base and the upper cover structural member, the contact piece assembly comprises a static conductive contact piece and a movable conductive reed located above the static conductive contact piece, a static contact is fixedly connected to the top of the static conductive contact piece, a movable contact is fixedly connected to the position, corresponding to the static contact, of the bottom of one end of the movable conductive reed, and the movable contact is fixedly connected to the position, corresponding to the movable contact, of the bottom of the other end of the movable conductive reed. The beneficial effects of the utility model are that: firstly, the large-diameter bimetallic strip is adopted, so that the elastic force is increased, the elastic height is increased, enough force is provided for ejecting the conductive contact, and the opening distance of the contact gap is enough; secondly, a large-area and large-thickness silver alloy contact is adopted, so that large current can be safely conducted, and the number of times of service life is increased; and thirdly, large-width beryllium copper (movable contact spring / static contact spring) is adopted for conduction, and reliable diversion stability is provided for a heavy load.

Description

Technical Field

[0001] The utility model relates to the technical field of overheat protection circuit breakers, in particular to a new energy equipment temperature overheat protection circuit breaker. Background Art

[0002] When it comes to high-temperature protection for new energy products, the industrial control program is used to control the circuit cut-off during the operation of related equipment. The NTC temperature sensor collects the temperature value. If the program detects that the temperature is too high, the collected data information is fed back to the MCU in the controller PLC. The MCU sends a command to the large-load relay of the component. The magnetic effect of the coil in the relay disconnects the power supply. This solution is the mainstream design control, which is expensive and has a complex circuit. Due to the delay in the NTC temperature sensor collecting information to the industrial control, the stability of the PLC electronic components and the overload capacity of the relay are affected by other components, which may cause misjudgment or delayed action on the rapidly heating related equipment, and the circuit cannot be effectively and securely cut off, resulting in safety accidents and even fires. This is an unavoidable thing for current new energy equipment. Utility Model Content

[0003] The purpose of the present invention is to provide a new energy equipment temperature overheating protection circuit breaker to solve the problems raised in the above background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solutions: a circuit breaker for overheat protection of new energy equipment, comprising:

[0005] Lower structure base;

[0006] an upper cover structure, with a lower structure base placed on top of the lower structure base;

[0007] A contact assembly is placed in the space formed by the lower structural base and the upper cover structure. The contact assembly includes a static conductive contact and a dynamic conductive spring located above the static conductive contact. The top of the static conductive contact is fixedly connected to a static contact point. The bottom of one end of the dynamic conductive spring is fixedly connected to a position corresponding to the static contact point. A conical convex point is provided in the middle of the dynamic conductive spring, and a bimetallic temperature plate is provided below the convex point.

[0008] The insulating part is placed between the dynamic conductive spring and the bimetallic temperature piece and is used for insulation between the dynamic conductive spring and the bimetallic temperature piece.

[0009] Preferably, a copper stud is inserted into one end of the upper cover structure, one end of the dynamic conductive spring is sleeved on the outside of the copper stud, and the bottom of the copper stud is threadedly connected to a copper screw cap for fastening the dynamic conductive spring.

[0010] Preferably, a copper stud 2 is inserted into the end of the upper cover structure away from the copper stud 1, the static conductive contact piece is sleeved on the outside of the copper stud 2, and the bottom of the copper stud 2 is threadedly connected to a copper screw cap 2 for fastening the static conductive contact piece.

[0011] Preferably, the insulating portion includes a PI insulating film 1 and a PI insulating film 2, and the PI insulating film 1 is stuck on the bottom of the dynamic conductive reed.

[0012] Preferably, the bimetallic temperature piece is fixedly connected to the bottom of the inner wall of the lower structure base, and the top of the bimetallic temperature piece is fixedly connected to the PI insulating film 2.

[0013] Preferably, the convex point in the middle of the dynamic conductive spring is in contact with the bimetallic temperature piece through the PI insulating film 1 and the PI insulating film 2.

[0014] Preferably, a plurality of hot-melt plastic columns are fixed to the top of the lower structure base, and a plurality of positioning holes are provided in the upper cover structure at positions corresponding to the hot-melt plastic columns.

[0015] Compared with the prior art, the beneficial effects of the present invention are: first, a large-diameter bimetallic strip is used to increase the elastic force and spring height, so that there is enough force to push open the conductive contact and the contact gap is opened a sufficient distance; second, a large-area and large-thickness silver alloy contact is used to safely conduct a large current and increase the number of working lifespans; third, a large-width beryllium copper conductor (dynamic reed / static contact) is used to provide reliable current conduction stability for large loads; fourth, the design uses double copper screws to lock the copper busbar, which can increase the conductive area and avoid insufficient conductivity of a single busbar, causing heat. It has a copper screw locking device, which can better fix the strength of the copper busbar and is not easy to loosen during the conduction process, thereby avoiding overheating; fifth, a double-layer insulating paper is installed inside to increase the surface electrical gap and creepage distance and enhance the insulation performance; sixth, the large-diameter bimetallic strip is hollowed out to expose the temperature control body. The temperature sensor can be placed on the top of the heating layer during installation. During the temperature sensing process, it is synchronized with the temperature rise of the heating layer, and can respond quickly to speed up the circuit disconnection time. ; Seventh, the bimetallic strip action support point and the contact opening point, including the dynamic spring piece, are designed to trigger in a right triangle. Through the calculation formula of the Pythagorean theorem and the physical lever principle, when the bimetallic strip is actuated, the contacts can be opened quickly, and the dynamic / static contacts can be opened with an opening distance of more than 3.6 mm, which can meet the relevant national standards. Eighth, this application adopts an upper and lower mutual control structure. After packaging, the internal related components are very compact to ensure that when a large current passes through, no current micro-swing will be generated, thereby causing excessive heat. Ninth, the structure of this application refers to the national standard requirements and meets the creepage distance, electrical clearance, withstand voltage and insulation strength requirements for long-term stable operation. Through the above-mentioned structural design requirements, the overheating circuit breaker can be realized, making the periodic structure compact, small in size, thin in size, quick in reaction, large in contact opening gap, wide in temperature controllable range, good in arc discharge performance, high in insulation strength, good in conductivity, high in power and high in current application, and large in load, which solves the gap in temperature protection measures for current new energy equipment applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a structural diagram of the utility model;

[0018] Figure 3 It is a structural diagram of the present utility model.

[0019] In the figure: 1. Lower structural base; 2. Upper cover structural part; 3. One copper stud; 4. Dynamic conductive spring; 5. One PI insulating film; 6. One copper screw cap; 7. Bimetallic temperature piece; 8. Hot-melt plastic column; 9. Two PI insulating films; 10. Two copper screw caps; 11. Static contact; 12. Static conductive contact piece; 13. Dynamic contact; 14. Two copper studs. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] See also Figure 1 、 2 As shown in Figure 3, the utility model provides a technical solution: a new energy equipment temperature overheating protection circuit breaker, comprising: a lower structure base 1; the lower structure base 1 is placed on the top of the lower structure base 1; the contact assembly is placed in the space formed by the lower structure base 1 and the upper cover structure 2, the contact assembly includes a static conductive contact 12 and a dynamic conductive spring 4 located above the static conductive contact 12, the top of the static conductive contact 12 is fixedly connected to a static contact 11, the bottom of one end of the dynamic conductive spring 4 is fixedly connected to the position corresponding to the static contact 11, and the middle part of the dynamic conductive spring 4 is provided with a cone. The structure has a convex point, and a bimetallic temperature piece 7 is arranged under the convex point; the insulating part is placed between the dynamic conductive spring 4 and the bimetallic temperature piece 7, and is used for insulation between the dynamic conductive spring 4 and the bimetallic temperature piece 7. By adding a mechanical safety protection wall, it can effectively physically and mechanically cut off the circuit in the event of failure of the industrial control PLC, making new energy equipment safer and more reliable. For example, in the battery pack of a new energy vehicle, this application product is connected and applied. When abnormal charging or discharging high temperature occurs, the circuit can be quickly cut off, so that a group of abnormal battery packs will no longer heat up, avoiding safety accidents.

[0022] It should be noted that the movable contact 13 of the present invention is welded on the movable conductive spring 4 to realize the movable conductive spring 4-shaped action component. The movable conductive spring 4 has a convex design. The height parameter of this convex point needs to be set, corresponding to the center point of the bimetallic temperature piece 7. After the entire product structure is formed, the bimetallic temperature piece 7 is reversely deformed to open, thereby causing the movable contact 13 on the movable conductive spring 4 to also open in the reverse direction, and no longer close with the static contact 11, thereby realizing the conductive disconnection of the movable / static contact 11; the static contact 11 is welded to the static conductive contact piece 12 to realize the static conductive component. The mechanical physical structure of the thermal protector is to set an overheat protection circuit for abnormal temperatures of new energy equipment to avoid safety accidents. The bimetallic strip has large elastic force and a wide temperature range. It is affected by the set protection temperature and uses the thermal expansion and contraction principle of the bimetallic strip to quickly and forcefully disconnect the circuit, so that the internal contacts are in an open state. When the temperature reaches a safe value and cools down, the bimetallic strip will automatically reset / or cannot be reset and can be manually reset manually, thereby realizing a mechanical overheat protection function. This product's technological breakthrough lies in DC / AC high-voltage and high-current load applications, such as DC100V100A to DC800V100A. It directly disconnects the circuit if the temperature is too high. Its most significant feature is its lever-type design, which allows the contact opening gap to exceed the safety requirement of 3.6mm. It utilizes large contacts, wide springs, screw-locked conductors, and an upper / lower tightening structure, resulting in wide creepage distances, insulation gaps, and a reinforced insulation layer. This overheat protection circuit breaker meets performance requirements with compact dimensions, a high overload capacity, a bimetallic strip unaffected by current, and rapid operation.

[0023] See also Figure 1 、 3 As shown, a copper stud 13 is inserted into one end of the upper cover structure 2, one end of the dynamic conductive spring 4 is sleeved on the outside of the copper stud 13, and the bottom of the copper stud 13 is threadedly connected to a copper screw cap 16 for fastening the dynamic conductive spring 4, and a copper stud 2 14 is inserted into the end of the upper cover structure 2 away from the copper stud 13, and the static conductive contact 12 is sleeved on the outside of the copper stud 2 14, and the bottom of the copper stud 2 14 is threadedly connected to a copper screw cap 2 10 for fastening the static conductive contact 12, the insulating part includes a PI insulating film 15 and a PI insulating film 29, the PI insulating film 5 is stuck at the bottom of the dynamic conductive spring 4, the bimetallic temperature piece 7 is fixedly connected to the bottom of the inner wall of the lower structure base 1, the top of the bimetallic temperature piece 7 is fixedly connected to the PI insulating film 29, and the convex point in the middle of the dynamic conductive spring 4 contacts the bimetallic temperature piece 7 through the PI insulating film 15 and the PI insulating film 29.

[0024] It should be noted that the PI insulating film 1 and the PI insulating film 2 of the utility model are used to provide insulation between the dynamic conductive reed 4 and the bimetallic temperature piece 7, and the PI film has high high temperature resistance and high insulation strength, and is an excellent insulating material; the bimetallic temperature piece 7 is placed close to the top in the internal structure, and is the core thermally sensitive sensing physical material component of the entire component. When the set temperature value is reached, the bimetallic temperature piece 7 is heated and reversely deformed to realize the mechanism of pushing the dynamic conductive reed 4; the PI insulating film 1 and the PI insulating film 2 are used to provide insulation between the bimetallic temperature piece 7 and the dynamic spring, and the PI film has high high temperature resistance and high insulation strength, and is an excellent insulating material; the bimetallic temperature piece 7 is placed close to the top in the internal structure, and is the core thermally sensitive sensing physical material component of the entire component. When the set temperature value is reached, the bimetallic temperature piece 7 is heated and reversely deformed to realize the mechanism of pushing the dynamic conductive reed 4.

[0025] See also Figure 1 As shown, a plurality of hot melt plastic columns 8 are fixed to the top of the lower structure base 1 , and a plurality of positioning holes are provided in the upper cover structure 2 at positions corresponding to the hot melt plastic columns 8 .

[0026] It should be noted that the materials of the upper cover structural member 2 and the lower structure base 1 of the utility model can be divided into ceramic parts and engineering plastic parts, among which ceramic parts need to be fastened by rivets, while engineering plastic parts can be fastened by hot-melt guide columns. The structural members are provided with fixed rivet holes and pressing structures according to the working requirements of the product, and are designed with a pressure-driven conductive spring 4 and a static contact piece top column and groove matching structure. When the upper / lower cover structures are combined, the relevant components are tightly fastened and the conductive performance is stable. The lower cover structure is designed to be hollowed out, so that the bimetallic temperature plate 7 can be exposed to the outside. When it is close to the heat source installation surface, it is almost flush with the surface position, so that the bimetallic temperature plate 7 is close to the heat source to achieve the synchronization requirements of the reaction speed and the heating speed. The action structure forms the function of realizing temperature control, and then the upper / lower structure is tightened, and the product assembly is completed.

[0027] This application adds a mechanical over-temperature protection layer to new energy equipment products, improving reliability and safety while reducing the risk of fire accidents. Based on the design specifications of the national standard GB / T 7251.1-2022, this application addresses the need for mechanical over-temperature cutouts for new energy equipment operating below DC / AC 800V and 100A. This solution addresses the current lack of mechanical over-temperature cutouts for high-power applications in new energy equipment, providing more direct protection for new energy equipment. It offers rapid response and physical control without the need for electronic control. For example, in applications such as new energy vehicles, new energy charging stations, power banks, and control equipment for electric trains operating below DC 800V, this technology can disconnect the circuit in the event of an over-temperature anomaly, preventing overheating or even spontaneous combustion, thus improving equipment safety. This product, which requires no additional electronic control, offers simple and effective control, low cost, and is suitable for mass production, similar to temperature control switches or fuses in household appliances, providing terminal protection for new energy equipment.

[0028] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "two ends", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0029] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one such feature.

[0030] In the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0031] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A new energy equipment overheat protection circuit breaker, characterized by: include: Lower structure base (1); An upper cover structure (2), a lower structure base (1) is placed on top of the lower structure base (1); A contact assembly is placed in a space formed by the lower structural base (1) and the upper cover structural member (2), the contact assembly includes a static conductive contact (12) and a dynamic conductive spring (4) located above the static conductive contact (12), the top of the static conductive contact (12) is fixedly connected to a static contact (11), the bottom of one end of the dynamic conductive spring (4) is fixedly connected to a dynamic contact (13) at a position corresponding to the static contact (11), the middle of the dynamic conductive spring (4) is provided with a convex point of a conical structure, and a bimetallic temperature plate (7) is provided below the convex point; The insulating portion is placed between the dynamic conductive spring (4) and the bimetallic temperature plate (7) and is used for insulation between the dynamic conductive spring (4) and the bimetallic temperature plate (7).

2. The overheat protection circuit breaker for new energy equipment according to claim 1, characterized in that: A copper stud (3) is inserted into one end of the upper cover structure (2), one end of the dynamic conductive spring (4) is sleeved on the outside of the copper stud (3), and the bottom of the copper stud (3) is threadedly connected to a copper screw cap (6) for fastening the dynamic conductive spring (4).

3. The overheat protection circuit breaker for new energy equipment according to claim 1, characterized in that: A copper stud 2 (14) is inserted into the end of the upper cover structure (2) away from the copper stud 1 (3), the static conductive contact piece (12) is sleeved on the outside of the copper stud 2 (14), and the bottom of the copper stud 2 (14) is threadedly connected to a copper screw cap 2 (10) for fastening the static conductive contact piece (12).

4. The new energy equipment overheat protection circuit breaker according to claim 1, characterized in that: The insulating portion comprises a PI insulating film 1 (5) and a PI insulating film 2 (9), and the PI insulating film 1 (5) is stuck on the bottom of the dynamic conductive spring (4).

5. The overheat protection circuit breaker for new energy equipment according to claim 4, characterized in that: The bimetallic temperature piece (7) is fixedly connected to the bottom of the inner wall of the lower structure base (1), and the top of the bimetallic temperature piece (7) is fixedly connected with a PI insulating film 2 (9).

6. The new energy equipment overheat protection circuit breaker according to claim 5, characterized in that: The convex point in the middle of the dynamic conductive spring (4) contacts the bimetallic temperature plate (7) through the PI insulating film 1 (5) and the PI insulating film 2 (9).

7. The new energy equipment overheat protection circuit breaker according to claim 1, characterized in that: A plurality of hot-melt plastic columns (8) are fixedly connected to the top of the lower structure base (1), and a plurality of positioning holes are provided in the upper cover structure (2) at positions corresponding to the hot-melt plastic columns (8).

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