Contactor and electrical equipment
By using a heat-conducting component in the contactor to transfer heat to the bottom of the housing and introduce it into the water channel, the problem of poor heat dissipation of the positive and negative electrodes and moving contact of the contactor is solved, and effective heat dissipation of the contactor is achieved.
Patent Information
- Application Number
- CN202423189219.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-23
AI Technical Summary
Poor heat dissipation at the positive and negative electrodes and moving contact of the contactor leads to localized high temperatures.
Heat is transferred from the moving contact and electrodes to the bottom of the housing using a heat-conducting component. The bottom of the housing corresponds to the water channel of the electrical equipment, thereby introducing heat into the water channel for heat dissipation.
This effectively reduces the temperature of the electrodes and moving contacts, improves the heat dissipation of the contactor, and avoids localized high temperatures.
Smart Images
Figure CN223624898U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of contactor heat dissipation technology, and in particular to a contactor and electrical equipment. Background Technology
[0002] Contactors are used in various electrical equipment applications, including but not limited to electric vehicles, for connecting and disconnecting circuits. A contactor typically includes a housing, a low-voltage coil housed within the housing, moving contacts, positive and negative electrodes, and other components. Contactors generate heat during operation, requiring heat dissipation to prevent localized overheating.
[0003] In related technologies, contactors use natural cooling to dissipate heat. However, since the positive and negative electrodes and moving contacts of the contactor are suspended, they cannot transfer heat downwards, resulting in poor heat dissipation at the positive and negative electrodes and moving contacts, causing localized high temperatures in the contactor. Utility Model Content
[0004] The main purpose of this utility model is to propose a contactor and electrical equipment that aims to solve the problem of poor heat dissipation at the positive and negative electrodes and moving contact of the contactor, so as to improve the problem of local high temperature in the contactor.
[0005] To achieve the above objectives, this utility model proposes a contactor comprising:
[0006] shell;
[0007] A low-voltage coil is located inside the housing;
[0008] A movable contact is disposed inside the housing and located above the low-voltage coil;
[0009] An electrode is disposed inside the housing and located above the low-voltage coil; the electrode is connected to the moving contact.
[0010] A heat-conducting element is disposed in the housing, the heat-conducting element being configured to transfer heat from the moving contact and the electrode to the bottom of the housing.
[0011] In one embodiment, one end of the heat-conducting element is connected to the electrode, and the other end of the heat-conducting element is connected to the bottom of the housing.
[0012] In one embodiment, the heat-conducting element includes:
[0013] A heat-conducting sheet is disposed inside the housing, and one end of the heat-conducting sheet is connected to the electrode;
[0014] A thermally conductive substrate is embedded in the bottom plate of the housing, and the thermally conductive substrate is connected to the end of the thermally conductive sheet away from the electrode; the thermally conductive sheet is configured to transfer the heat of the electrode and the moving contact to the thermally conductive substrate, and the thermally conductive substrate is configured to transfer the heat transferred by the thermally conductive sheet to the water channel at the bottom of the housing.
[0015] In one embodiment, the heat-conducting sheet includes a first heat-conducting sheet and a second heat-conducting sheet arranged at an angle;
[0016] One end of the first heat-conducting sheet is connected to the electrode, and the other end of the first heat-conducting sheet extends horizontally away from the electrode.
[0017] One end of the second heat-conducting sheet is connected to the end of the first heat-conducting sheet away from the electrode, and the other end of the second heat-conducting sheet extends toward the heat-conducting substrate and is connected to the heat-conducting substrate.
[0018] In one embodiment, one end of the heat-conducting sheet is provided with an arc-shaped notch, which mates with the outer arc surface of the electrode;
[0019] And / or, the heat-conducting sheet is welded to the electrode.
[0020] In one embodiment, the thermally conductive substrate extends through the upper and lower surfaces of the base plate.
[0021] In one embodiment, the thermally conductive substrate includes a first heat sink and a second heat sink disposed opposite to each other, the first heat sink and the second heat sink being connected by a connecting plate, and clearance grooves being formed on both sides of the connecting plate.
[0022] In one embodiment, a thermally conductive adhesive is provided beneath the thermally conductive substrate, the thermally conductive adhesive being configured to transfer the heat transferred by the thermally conductive substrate to the water channel.
[0023] In one embodiment, an insulating film is provided beneath the thermally conductive adhesive.
[0024] To achieve the above objectives, this utility model also proposes an electrical device, comprising:
[0025] The main body, which is provided with water channels;
[0026] As described above, the contactor's heat-conducting element transfers heat from the moving contact and the electrode to the water channel.
[0027] The technical solution of this utility model uses a heat-conducting component to transfer the heat of the moving contact and the electrode to the bottom of the housing. Since the bottom of the housing corresponds to the water channel of the electrical equipment, the heat transferred by the heat-conducting component can be introduced into the water channel, thereby achieving a significant drop in temperature at the electrode and the moving contact. This effectively solves the problem of poor heat dissipation at the positive and negative electrodes and the moving contact of the contactor, and improves the problem of local high temperature in the contactor. Attached Figure Description
[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0029] Figure 1 A partial structural schematic diagram of an embodiment of the contactor provided by this utility model;
[0030] Figure 2 A partial structural schematic diagram of an embodiment of the contactor provided by this utility model when a ceramic cavity seal is used;
[0031] Figure 3 A schematic diagram of the structure of an embodiment of the contactor provided by this utility model;
[0032] Figure 4 A schematic diagram of the heat transfer path of a contactor embodiment provided by this utility model.
[0033] Explanation of icon numbers:
[0034] label name label name 100 contactor 511a Arc-shaped bayonet 10 shell 512 Second heat-conducting plate 11 base plate 52 Thermally conductive substrate 20 low voltage coil 521 First heat sink 30 Moving contact plate 522 Second heat sink 40 electrode 523 Connecting plate 50 thermal conductive components 52a clearance slot 51 thermal pad 60 potting compound 511 First heat-conducting sheet 70 Ceramic cavity
[0035] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0037] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0038] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.
[0039] Contactors are used in various electrical equipment applications, including but not limited to electric vehicles, for connecting and disconnecting circuits. A contactor typically includes a housing, a low-voltage coil housed within the housing, moving contacts, positive and negative electrodes, and other components. Contactors generate heat during operation, requiring heat dissipation to prevent localized overheating.
[0040] In related technologies, contactors use natural cooling to dissipate heat. However, since the positive and negative electrodes and moving contacts of the contactor are suspended, they cannot transfer heat downwards, resulting in poor heat dissipation at the positive and negative electrodes and moving contacts, causing localized high temperatures in the contactor.
[0041] Based on the above problems, this utility model proposes a contactor 100, which aims to solve the problem of poor heat dissipation at the positive and negative electrodes 40 and the moving contact 30 of the contactor 100, so as to improve the problem of local high temperature in the contactor 100.
[0042] Please see Figures 1 to 4 In one embodiment of the present invention, the contactor 100 includes a housing 10, a low-voltage coil 20, a moving contact 30, an electrode 40, and a heat-conducting element 50; the low-voltage coil 20 is disposed inside the housing 10; the moving contact 30 is disposed inside the housing 10 and located above the low-voltage coil 20; the electrode 40 is disposed inside the housing 10 and located above the low-voltage coil 20, and the electrode 40 is connected to the moving contact 30; the heat-conducting element 50 is disposed in the housing 10, and the heat-conducting element 50 is configured to transfer the heat of the moving contact 30 and the electrode 40 to the bottom of the housing 10.
[0043] The technical solution of this utility model uses a heat-conducting component 50 to transfer the heat of the moving contact 30 and the electrode 40 to the bottom of the housing 10. Since the bottom of the housing 10 corresponds to the water channel of the electrical equipment, the heat transferred by the heat-conducting component 50 can be introduced into the water channel, thereby achieving a significant drop in temperature at the electrode 40 and the moving contact 30. This effectively solves the problem of poor heat dissipation at the positive and negative electrodes 40 and the moving contact 30 of the contactor 100, and improves the problem of local high temperature in the contactor 100.
[0044] Furthermore, since the heat of the moving contact 30 and the electrode 40 is reduced, the heat from other devices with higher temperatures (such as the copper busbar connected to the electrode 40) can be transferred to the moving contact 30 and the electrode 40 with lower temperatures under the effect of temperature difference, thereby indirectly improving the heat dissipation effect on other devices.
[0045] It should be noted that the electrical equipment has internal water channels for heat dissipation of components. When the contactor 100 is applied to the electrical equipment, the contactor 100 is installed near the water channel and the bottom of the housing 10 of the contactor 100 is in thermal contact with the water channel. In this way, when the heat of the moving contact 30 and the electrode 40 is transferred to the bottom of the housing 10 through the heat-conducting element 50, the heat can be introduced into the water channel.
[0046] In this embodiment, the electrode 40 and the moving contact 30 are jointly sealed inside the ceramic cavity 70 so that the electrode 40 and the moving contact 30 are placed in the upper half of the housing 10 through the ceramic cavity 70. The low-voltage coil 20 is sealed with potting compound 60 so that the low-voltage coil 20 is sealed in the lower half of the housing 10.
[0047] In practical applications, the heat-conducting component 50 can be directly connected to the electrode 40 to transfer heat through direct contact; or, the heat-conducting component 50 can absorb the heat from the electrode 40 and the moving contact 30 through radiation heat transfer or other means. In this case, the heat-conducting component 50 does not need to be in direct contact with the electrode 40 and the moving contact 30.
[0048] In practical applications, the shape of the heat-conducting component 50 is not specifically limited. The heat-conducting component 50 can be in the form of a sheet, plate, block, strip, etc., as long as it can transfer the heat from the moving contact 30 and the electrode 40 to the bottom of the outer shell 10.
[0049] Please see Figures 1 to 4 In one embodiment of this utility model, one end of the heat-conducting element 50 is connected to the electrode 40, and the other end of the heat-conducting element 50 is connected to the bottom of the outer shell 10.
[0050] This configuration allows the heat-conducting component 50 to transfer the heat from the moving contact 30 and the electrode 40 to the bottom of the housing 10 through direct contact, thereby achieving rapid heat transfer and improving the heat dissipation efficiency of the moving contact 30 and the electrode 40.
[0051] It should be noted that the heat-conducting component 50 is connected to the electrode 40. The heat generated by the electrode 40 can be directly transferred to the heat-conducting component 50, while the heat generated by the moving contact 30 can be transferred to the electrode 40 and then to the heat-conducting component 50 through the electrode 40.
[0052] Please see Figures 2 to 4 In one embodiment of the present invention, the heat-conducting component 50 includes a heat-conducting sheet 51 and a heat-conducting substrate 52; the heat-conducting sheet 51 is disposed inside the housing 10, and one end of the heat-conducting sheet 51 is connected to the electrode 40; the heat-conducting substrate 52 is embedded in the bottom plate 11 of the housing 10, and the heat-conducting substrate 52 is connected to the end of the heat-conducting sheet 51 away from the electrode 40; the heat-conducting sheet 51 is configured to transfer the heat from the electrode 40 and the moving contact 30 to the heat-conducting substrate 52, and the heat-conducting substrate 52 is configured to transfer the heat transferred by the heat-conducting sheet 51 to the water channel at the bottom of the housing 10.
[0053] With this configuration, the heat from the electrode 40 and the moving contact 30 can be transferred downwards to the heat-conducting substrate 52 through the heat-conducting component 50, and then transferred to the water channel at the bottom of the housing 10 through the heat-conducting substrate 52, so as to smoothly lead the heat into the water channel, improve the heat transfer effect, and enable the heat of the electrode 40 and the moving contact 30 to be reduced quickly.
[0054] In this embodiment, the electrode 40 is divided into a positive electrode 40 and a negative electrode 40. Both the positive electrode 40 and the negative electrode 40 are connected to a movable contact piece 30, and each movable contact piece 30 is connected to two positive electrodes 40 or two negative electrodes 40. That is, the contactor 100 includes four electrodes 40. One electrode 40 is connected to the heat-conducting substrate 52 through a heat-conducting sheet 51, so that the heat generated by the electrode 40 can be transferred to the heat-conducting substrate 52 through the heat-conducting sheet 51 connected to it.
[0055] In practical applications, the heat-conducting sheet 51 and the electrode 40 can be connected by welding, screw connection, snap-fit, adhesive bonding, etc., as long as the heat from the electrode 40 can be transferred to the heat-conducting substrate 52 through the heat-conducting sheet 51. Similarly, the heat-conducting sheet 51 and the heat-conducting substrate 52 can also be connected by welding, screw connection, snap-fit, adhesive bonding, etc., as long as the heat from the heat-conducting sheet 51 can be smoothly transferred to the heat-conducting substrate 52.
[0056] The thermally conductive substrate 52 is embedded in the base plate 11 of the housing 10. It can be understood that the thermally conductive substrate 52 can be completely contained within the base plate 11, or it can penetrate the upper and / or lower surfaces of the base plate 11. It should be noted that when the thermally conductive substrate 52 is completely contained within the base plate 11, the heat transferred by the thermally conductive sheet 51 will be transferred to the thermally conductive substrate 52 through the base plate 11, and the heat from the thermally conductive substrate 52 needs to be transferred downwards through the water channels of the base plate 11.
[0057] In practical applications, the heat-conducting sheet 51 can be made of high thermal conductivity materials such as copper or aluminum. Similarly, the heat-conducting substrate 52 can be made of high thermal conductivity materials such as copper or aluminum.
[0058] Please see Figure 2 , Figure 4 In one embodiment of the present invention, the heat-conducting sheet 51 includes a first heat-conducting sheet 511 and a second heat-conducting sheet 512 arranged at an angle; one end of the first heat-conducting sheet 511 is connected to the electrode 40, and the other end of the first heat-conducting sheet 511 extends horizontally in a direction away from the electrode 40; one end of the second heat-conducting sheet 512 is connected to the end of the first heat-conducting sheet 511 away from the electrode 40, and the other end of the second heat-conducting sheet 512 extends toward the heat-conducting substrate 52 and is connected to the heat-conducting substrate 52.
[0059] With this configuration, by designing the heat-conducting plates 51 as a first heat-conducting plate 511 and a second heat-conducting plate 512 arranged at an angle, the first heat-conducting plate 511 and the second heat-conducting plate 512 can make full use of the space between the positive electrode 40 and the negative electrode 40, so as not to increase the volume of the contactor 100, and the contactor 100 can be miniaturized.
[0060] In practical applications, the first heat-conducting sheet 511 and the second heat-conducting sheet 512 can be connected by welding, screw connection or other processes; or, a whole heat-conducting sheet 51 can be bent to obtain the first heat-conducting sheet 511 and the second heat-conducting sheet 512 set at an angle.
[0061] Please see Figure 2 In one embodiment of this utility model, one end of the heat-conducting sheet 51 is provided with an arc-shaped bayonet 511a, which is engaged with the outer arc surface of the electrode 40.
[0062] With this configuration, since the electrode 40 has a columnar structure, by setting an arc-shaped notch 511a at one end of the heat-conducting sheet 51 to hold the arc-shaped notch 511a on the electrode 40 and to match the outer arc surface of the electrode 40, the heat-conducting contact area between the heat-conducting sheet 51 and the electrode 40 can be increased, so that the heat from the electrode 40 and the moving contact 30 can be transferred to the heat-conducting sheet 51 more quickly.
[0063] Please see Figure 2In one embodiment of this utility model, the heat-conducting sheet 51 is welded to the electrode 40.
[0064] This configuration, using welding to connect the heat-conducting plate 51 and the electrode 40, improves the reliability of the connection between them. It prevents the connection from breaking due to external forces such as vibration, thus avoiding any impact on the heat dissipation effect on the electrode 40 and the moving contact 30. Furthermore, welding allows for better heat transfer between the heat-conducting plate 51 and the electrode 40.
[0065] Please see Figure 3 In one embodiment of this utility model, the thermally conductive substrate 52 penetrates the upper and lower surfaces of the base plate 11.
[0066] With this configuration, since the base plate 11 of the outer casing 10 is usually made of plastic, which has poor thermal conductivity, by having the thermally conductive substrate 52 penetrate through the upper and lower surfaces of the base plate 11, the thermally conductive sheet 51 can directly contact the thermally conductive substrate 52 for thermal conduction, and the thermally conductive substrate 52 does not need to transfer heat to the water channel below through the base plate 11, thus improving the heat transfer effect.
[0067] Please see Figure 3 In one embodiment of the present invention, the heat-conducting substrate 52 includes a first heat sink 521 and a second heat sink 522 disposed opposite to each other. The first heat sink 521 and the second heat sink 522 are connected by a connecting plate 523, and both sides of the connecting plate 523 are provided with clearance grooves 52a.
[0068] This configuration allows the first heat sink 521, the second heat sink 522, and the connecting plate 523 to form an H-shaped heat-conducting substrate 52, so that clearance grooves 52a are formed on both sides of the connecting plate 523. The clearance grooves 52a are designed to avoid bolts or other structural components on the base plate 11. This allows the heat-conducting substrate 52 to be embedded without changing other structural components on the base plate 11, thereby simplifying the manufacturing process.
[0069] In one embodiment of the present invention, thermally conductive adhesive is provided below the thermally conductive substrate 52, and the thermally conductive adhesive is configured to transfer the heat transferred by the thermally conductive substrate 52 to the water channel.
[0070] With this configuration, the heat transferred by the thermally conductive substrate 52 can be transferred to the water channel below through the thermally conductive pad, achieving rapid heat transfer.
[0071] Alternatively, the thermal pad can be a thermally conductive silicone pad, which has good thermal conductivity.
[0072] In one embodiment of this utility model, an insulating film is provided below the thermally conductive adhesive.
[0073] This design of the insulating film prevents other electrical components of the equipment from short-circuiting with the contactor 100 through the conductor in the waterway, thus improving the performance of the contactor 100.
[0074] In one embodiment of this utility model, a thermal simulation test comparison and analysis are performed on the contactor in the prior art and the contactor 100 proposed in this solution as follows:
[0075] For existing contactors, the current flows through the copper busbars at both ends of the contactor electrode 40 to 300A. The heat generated by the contact resistance between the electrode 40 and the moving contact 30 is 18W. Under the conditions of a temperature of 65°C on the bottom plate 11 and an ambient temperature of 85°C, the maximum temperature of the moving contact 30 reaches 158.6°C, and the temperature at the copper column contact point of the electrode 40 reaches 152.5°C.
[0076] For the contactor 100 proposed in this solution, under the same conditions, the maximum temperature of the moving contact 30 only reaches 130.7℃, and the temperature at the copper column contact position of the electrode 40 only reaches 125.2℃. Therefore, the heat dissipation effect of the contactor 100 proposed in this solution is significantly improved.
[0077] This utility model also proposes an electrical device, which includes a body and a contactor 100. The specific structure of the contactor 100 is as described in the above embodiments. Since this electrical device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here. The body is provided with a water channel; the heat-conducting element 50 of the contactor 100 transfers the heat from the moving contact 30 and the electrode 40 to the water channel.
[0078] In this embodiment, the contactor 100 is installed near the water channel on the main body, and the bottom of the housing 10 of the contactor 100 is in thermal contact with the water channel. In this way, when the heat of the moving contact 30 and the electrode 40 is transferred to the bottom of the housing 10 through the heat-conducting component 50, the heat can be introduced into the water channel, so as to achieve a significant drop in temperature at the electrode 40 and the moving contact 30. This effectively solves the problem of poor heat dissipation at the positive and negative electrodes 40 and the moving contact 30 of the contactor 100, and improves the problem of local high temperature in the contactor 100.
[0079] In practical applications, electrical equipment can be used in vehicles, motors, elevators, robots, and other equipment.
[0080] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A contactor, characterized in that, include: shell; A low-voltage coil is located inside the housing; A movable contact is disposed inside the housing and located above the low-voltage coil; An electrode is disposed inside the housing and located above the low-voltage coil; the electrode is connected to the moving contact. A heat-conducting element is disposed in the housing, the heat-conducting element being configured to transfer heat from the moving contact and the electrode to the bottom of the housing.
2. The contactor as claimed in claim 1, characterized in that, One end of the heat-conducting element is connected to the electrode, and the other end of the heat-conducting element is connected to the bottom of the outer casing.
3. The contactor as described in claim 2, characterized in that, The heat-conducting component includes: A heat-conducting sheet is disposed inside the housing, and one end of the heat-conducting sheet is connected to the electrode; A thermally conductive substrate is embedded in the bottom plate of the housing, and the thermally conductive substrate is connected to the end of the thermally conductive sheet away from the electrode; the thermally conductive sheet is configured to transfer the heat of the electrode and the moving contact to the thermally conductive substrate, and the thermally conductive substrate is configured to transfer the heat transferred by the thermally conductive sheet to the water channel at the bottom of the housing.
4. The contactor as described in claim 3, characterized in that, The heat-conducting sheet includes a first heat-conducting sheet and a second heat-conducting sheet arranged at an angle; One end of the first heat-conducting sheet is connected to the electrode, and the other end of the first heat-conducting sheet extends horizontally away from the electrode. One end of the second heat-conducting sheet is connected to the end of the first heat-conducting sheet away from the electrode, and the other end of the second heat-conducting sheet extends toward the heat-conducting substrate and is connected to the heat-conducting substrate.
5. The contactor as described in claim 3, characterized in that, One end of the heat-conducting sheet is provided with an arc-shaped notch, which mates with the outer arc surface of the electrode; And / or, the heat-conducting sheet is welded to the electrode.
6. The contactor as described in claim 3, characterized in that, The thermally conductive substrate extends through the upper and lower surfaces of the base plate.
7. The contactor as claimed in claim 6, characterized in that, The thermally conductive substrate includes a first heat sink and a second heat sink disposed opposite to each other. The first heat sink and the second heat sink are connected by a connecting plate, and clearance grooves are formed on both sides of the connecting plate.
8. The contactor as claimed in claim 3, characterized in that, A thermally conductive adhesive is disposed beneath the thermally conductive substrate, and the thermally conductive adhesive is configured to transfer the heat transferred by the thermally conductive substrate to the water channel.
9. The contactor as claimed in claim 8, characterized in that, An insulating film is provided beneath the thermally conductive adhesive.
10. An electrical device, characterized in that, include: The main body, which is provided with water channels; The contactor as claimed in any one of claims 1 to 9, wherein the heat-conducting element of the contactor transfers heat from the moving contact and the electrode to the water channel.