A busbar assembly for a PTC electric heater

Abstract

The present invention provides a busbar assembly for a PTC electric heater, which solves the technical problem that the installation space reserved for the existing busbar is greatly increased in order to meet the user's demand for fast heating speed. The busbar is provided with a busbar and an insulating cover plate, and the busbar is provided with a busbar busbar and a conductive connecting piece. The busbar busbar is provided with a positive busbar busbar and a negative busbar busbar, and the positive busbar busbar is provided with a first plug hole, and the negative busbar busbar is provided with a second plug hole; the conductive connecting piece is provided with a first conductive connecting piece and a second conductive connecting piece; the first conductive connecting piece is electrically connected to the positive busbar busbar; the second conductive connecting piece is electrically connected to the negative busbar busbar; the positive busbar busbar is provided with an installation notch, and the negative busbar busbar is arranged in the installation notch, and the other end of the second conductive connecting piece connected to the negative busbar busbar extends outward after passing through the upper or lower part of the positive busbar busbar. It can be widely used in the technical field of PTC electric heaters.

Description

Technical Field

[0001] The invention relates to the technical field of PTC electric heaters, and in particular to a busbar assembly for a PTC electric heater. Background Art

[0002] PTC (Positive Temperature Coefficient) heater is a PTC heater. Because PTC heaters have the characteristics of fast start-up speed, good temperature control, ideal working reliability, energy saving and long service life, they are widely used as electric heating elements for manufacturing various electric heating appliances such as air conditioners, heaters, dryers, dishwashers, water heaters, food processors, heated floor cleaners, etc., and even as important components of control and protection devices such as current limiters, filter protectors, overload protectors, demagnetization controllers, and start controllers. At present, PTC heaters are often configured in new energy electric vehicles for battery thermal management and air conditioning heating. At present, in the field of new energy vehicles, the comfort of the car compartment in winter and the charging and discharging of the power battery both require a certain amount of heat. Since electric vehicles currently lack the engine waste heat of traditional vehicles, they must be heated by an electric heating system. PTC heaters are an ideal choice. As a very important heating element in the PTC heater, the PTC heating pack includes components such as a positive electrode sheet, a negative electrode sheet, and a PTC resistor sheet placed between the positive and negative electrode sheets. Since the PTC heater needs to output power at different levels, the PTC heating pack group is divided into several groups and controlled separately by the PTC controller, which makes it more difficult to complete the circuit transfer in a relatively small space. A busbar is required to complete the power connection of different series-connected PTC heating pack groups; the PCB board in the PTC controller is electrically connected to the PTC heating pack through the busbar, and the busbar plays a very important role in power connection and transfer between the PTC controller and the PTC heating pack.

[0003] With the sustainable development of new energy vehicle technology, users have higher and higher requirements for PTC heaters. In order to meet users' demand for fast heating speed, PTC heaters need to increase output power. Therefore, the number of PTC heating packs needs to be increased, thereby increasing the area of ​​the manifold. For example, to increase the output power from 5 kilowatts to 10,000 watts, the number of PTC heating packs often needs to be increased by 1 time, and the corresponding existing manifold needs to be increased by 1 time based on the original area, which greatly increases the installation space reserved for the manifold by the PTC heater. Summary of the invention

[0004] The purpose of the present invention is to solve the deficiencies of the above-mentioned technology and provide a busbar assembly for a PTC electric heater, so as to reduce the installation space reserved for the busbar and meet the user's demand for fast heating speed.

[0005] To this end, the present invention provides a busbar assembly for a PTC electric heater, which is provided with a busbar, the busbar is provided with a busbar busbar, and a conductive connecting piece connected to the busbar busbar, the busbar busbar is provided with a positive busbar busbar and a negative busbar busbar, and the positive busbar busbar and the negative busbar busbar are completely isolated; the positive busbar busbar is provided with a first plug-in jack for plug-in electrical connection of the positive terminal of the PTC heating pack, and the negative busbar busbar is provided with a second plug-in electrical connection of the negative terminal of the PTC heating pack; the conductive connecting piece is provided with a first conductive connecting piece and a second conductive connecting piece; one end of the first conductive connecting piece is electrically connected to the positive busbar busbar, and the other end of the first conductive connecting piece extends outwardly for connecting to the PTC The positive terminal of the current output circuit of the controller is electrically connected; one end of the second conductive connecting piece is electrically connected to the negative busbar, and the other end of the second conductive connecting piece extends outwardly for being electrically connected to the negative terminal of the current input circuit of the PTC controller; a mounting notch is provided on the positive busbar, and the mounting notch is provided with a longitudinal through groove and a longitudinal through hole, the positive busbar is provided with a longitudinal through groove on the side at the edge thereof, and the positive busbar is provided with a longitudinal through hole inside thereof; the negative busbar is arranged in the mounting notch, and each negative busbar is connected to a second conductive connecting piece, and the other end of the second conductive connecting piece connected to the negative busbar extends outwardly after passing through the top or bottom of the positive busbar.

[0006] Preferably, the number of positive busbars is set to one, and a negative busbar is set for each mounting notch.

[0007] Preferably, the extension direction of the other end of each second conductive connecting piece is substantially the same; when the second conductive connecting piece is blocked by the position of the positive bus bar when extending outward, the second conductive connecting piece turns around to bypass the positive bus bar and then continues to extend outward.

[0008] Preferably, the other end of the first conductive connecting plate extends in substantially the same direction as the other end of the second conductive connecting plate, and the other end of the first conductive connecting plate and the other end of the second conductive connecting plate are substantially on the same horizontal plane.

[0009] Preferably, the positive electrode busbar and the first conductive connecting plate connected thereto are an integral structure; the negative electrode busbar and the second conductive connecting plate connected thereto are an integral structure.

[0010] Preferably, a plurality of first spring tongues for plugging in the positive terminal of the PTC heating pack are provided at the edge of the first socket; and a plurality of second spring tongues for plugging in the negative terminal of the PTC heating pack are provided at the edge of the second socket.

[0011] Preferably, the present invention is further provided with an insulating cover plate, which is used in conjunction with a busbar for a PTC electric heater, and the upper and lower surfaces of the busbar are both provided with insulating cover plates for electrical insulation; the insulating cover plate is provided with an upper insulating cover plate and a lower insulating cover plate, the upper insulating cover plate is arranged on the upper surface of the busbar, and the lower insulating cover plate is arranged on the lower surface of the busbar, and the upper insulating cover plate and the lower insulating cover plate are connected by snap-fit ​​adapters; the positive busbar and the negative busbar are both provided with a first through hole, and the snap passes through the first through hole; the upper insulating cover plate is provided with a second through hole for the positive terminal or the negative terminal of the PTC heating pack to pass through, and the lower insulating cover plate is provided with a third through hole for the positive terminal or the negative terminal of the PTC heating pack to pass through; in the space area where the positive busbar is located, the second through hole, the third through hole and the first socket are arranged opposite to each other up and down; in the space area where the negative busbar is located, the second through hole, the third through hole and the second socket are arranged opposite to each other up and down.

[0012] Preferably, the lower insulating cover plate is connected with a positioning plate, and the positioning plate is arranged between the upper insulating cover plate and the lower insulating cover plate; a concave through groove is arranged on the positioning plate, and the second conductive connecting piece is arranged in the concave through groove.

[0013] Preferably, the lower insulating cover plate is provided with positioning grooves adapted to the positive busbar and the negative busbar.

[0014] Preferably, the upper insulating cover plate is provided with a guide hole, and the lower insulating cover plate is connected with a guide column, and the guide column is adaptively connected to the guide hole.

[0015] The beneficial effects of the present invention are as follows: the present invention provides a busbar assembly for a PTC electric heater, which has a novel design, a simple and reasonable structure, and significant technical effects. It is mainly reflected in the following three aspects:

[0016] Firstly, a circuit channel of the positive busbar is naturally formed between two adjacent installation notches, so that the current has more paths through the positive busbar to reach the positive terminal of each PTC heating pack in a shorter time, thus meeting the current demand for heating of each PTC heating pack.

[0017] Secondly, the negative bus bar is arranged in the installation notch of the positive bus bar, especially in the longitudinal through hole. Compared with the existing bus bar, the overall structural arrangement of the positive bus bar and the negative bus bar of the bus bar of the bus bar of the present invention is more compact, and the selection of the plug-in position of the PTC heating pack and the bus bar is more flexible, which facilitates a more compact arrangement of multiple PTC heating packs and effectively reduces the installation space reserved for the PTC heater for the bus bar as a whole.

[0018] Again, the other end of the second conductive connecting plate connected to the negative bus bar extends outward from above or below the positive bus bar. Through the overhead structure design, the area occupied by the second conductive connecting plate on the existing bus bar is reduced, effectively reducing the installation space reserved for the bus bar by the PTC heater. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the busbar of the present invention;

[0020] Figure 2 yes Figure 1 A schematic diagram of the structure of the stereogram shown;

[0021] Figure 3 yes Figure 1 A schematic diagram of the structure of the positive busbar;

[0022] Figure 4 yes Figure 3 A schematic diagram of the structure of the stereogram shown;

[0023] Figure 5 It is a structural schematic diagram of the lower insulating cover plate of the present invention;

[0024] Figure 6 yes Figure 5 A schematic diagram of the structure of the stereogram shown;

[0025] Figure 7 It is a structural schematic diagram of the busbar of the present invention being installed on the lower insulating cover plate;

[0026] Figure 8 yes Figure 7 The structural schematic diagram of the stereogram shown;

[0027] Fig. 9 It is a structural schematic diagram of the upper insulating cover plate of the present invention;

[0028] Fig.10 yes Fig. 9 A schematic diagram of the structure of the stereogram shown;

[0029] Fig.11 It is a schematic diagram of the structure of the present invention;

[0030] Fig.12 yes Fig.11 A schematic diagram of the structure of the stereogram shown;

[0031] Fig.13 yes Fig.11 The structural schematic diagram of the exploded view shown;

[0032] Fig.14 yes Fig.11 The structural schematic diagram of the exploded view of the AA section view shown;

[0033] Fig.15 yes Fig.11 The structural schematic diagram of the exploded view of the BB cross-sectional view shown.

[0034] Markings in the figure: 1. busbar, 2. conductive connecting piece, 3. installation notch, 4. positioning plate, 5. concave through groove, 6. positioning groove, 7. guide hole, 8. guide column, 9. elastic card, 10. card hole, 11. positive busbar, 12. negative busbar, 13. gap, 21. first conductive connecting piece, 22. second conductive connecting piece, 31. longitudinal through groove, 32. longitudinal through hole, 41. first plug hole, 42. second plug hole, 51. first spring tongue, 52. second spring tongue, 61. upper insulating cover, 62. lower insulating cover, 71. first through hole, 72. second through hole, 73. third through hole. DETAILED DESCRIPTION

[0035] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments to help understand the content of the present invention. The methods used in the present invention are all conventional methods unless otherwise specified; the raw materials and devices used are all conventional commercial products unless otherwise specified.

[0036] Depend on Figure 1 to Figure 4 As shown, the present invention provides a busbar assembly for a PTC electric heater, which is provided with a busbar, the busbar is provided with a busbar bus 1, and a conductive connecting piece 2 connected to the busbar bus 1, the busbar bus 1 is provided with a positive busbar bus 11 and a negative busbar bus 12, and the positive busbar bus 11 is completely isolated from the negative busbar bus 12; usually, according to actual conditions, the positive busbar bus 11 and the negative busbar bus 12 are separated by a gap 13 of appropriate width to form an air resistor to prevent a short circuit between the positive busbar bus 11 and the negative busbar bus 12. The positive busbar 11 is provided with a first socket 41 for plug-in electrical connection of the positive terminal of the PTC heating pack, and the negative busbar 12 is provided with a second socket 42 for plug-in electrical connection of the negative terminal of the PTC heating pack; each PTC heating pack is provided with a positive terminal and a negative terminal, and the positive terminal of the PTC heating pack is matched and inserted into the first socket 41 for electrical connection, and the negative terminal of the PTC heating pack is matched and inserted into the second socket 42 for electrical connection, which is convenient for installation and disassembly on the one hand; on the other hand, it effectively avoids the risk of tin melting at high temperature in traditional solder connection.

[0037] Depend on Figure 1 , Figure 2As shown, the conductive connecting piece 2 is provided with a first conductive connecting piece 21 and a second conductive connecting piece 22; the first conductive connecting piece 21 and the second conductive connecting piece 22 are both conductive materials, which can be metal conductive materials, usually copper, aluminum or their alloys. One end of the first conductive connecting piece 21 is electrically connected to the positive busbar 11, and the other end of the first conductive connecting piece 21 extends outwards, which is used to be electrically connected to the positive end of the current output circuit of the PTC controller; one end of the second conductive connecting piece 22 is electrically connected to the negative busbar 12, and the other end of the second conductive connecting piece 22 extends outwards, which is used to be electrically connected to the negative end of the current input circuit of the PTC controller; the PTC controller is a commercially available device, and the PTC controller is electrically connected to the PTC heating pack through the busbar 1 of the busbar, wherein the busbar 1 of the busbar plays the role of circuit switching, and the PTC heating pack generates heat after being energized.

[0038] Depend on Figure 3 , Figure 4 As shown, the positive busbar 11 is provided with a mounting notch 3, and the mounting notch 3 is provided with a longitudinal slot 31 and a longitudinal through hole 32. The longitudinal slot 31 is provided on the side of the edge of the positive busbar 11; the longitudinal through hole 32 is provided inside the positive busbar 11. In this embodiment, a longitudinal slot 31 is provided on each of the left and right sides of the positive busbar 11, and three longitudinal through holes 32 are provided in the positive busbar 11 at intervals in the horizontal direction. Figure 1 , Figure 2 As shown, the negative bus bar 12 is arranged in the installation notch 3, and each negative bus bar 12 is connected to a second conductive connecting plate 22. The other end of the second conductive connecting plate 22 connected to the negative bus bar 12 extends outward from the top or bottom of the positive bus bar 11 to be electrically connected to the negative end of the current input circuit of the PTC controller.

[0039] The present invention has novel design, simple and reasonable structure, remarkable technical effect, and meets the demand of effectively reducing the installation space reserved for the busbar by the PTC heater, which is mainly reflected in the following three aspects:

[0040] Firstly, a circuit channel of the positive busbar 11 is naturally formed between two adjacent installation notches 3, so that the current passes through the positive busbar 11 to reach the positive terminal of each PTC heating pack through more paths and in a shorter time, thereby meeting the current demand for heating of each PTC heating pack, and overcoming the defect that the current of the existing busbar structure reaches the far end from the proximal end of the positive busbar 11 and passes through the positive terminal of each PTC heating pack in turn, so that when the number of PTC heating packs is increased, the current demand for heating of each PTC heating pack cannot be fully met.

[0041] Secondly, the negative busbar 12 is arranged in the installation notch 3 of the positive busbar 11, especially in the longitudinal through hole 32. Compared with the existing busbar, the overall structural arrangement of the positive busbar 11 and the negative busbar 12 of the busbar of the present invention is more compact, and the selection of the plug-in position of the positive terminal and the negative terminal of each PTC heating pack on the busbar is also more flexible, which facilitates a more compact arrangement of multiple PTC heating packs, and effectively reduces the installation space reserved for the PTC heater for the busbar as a whole.

[0042] Again, the other end of the second conductive connecting plate 22 connected to the negative bus bar 12 extends outward from above or below the positive bus bar 11. Through the overhead structure design, the area occupied by the second conductive connecting plate 22 on the existing bus bar is reduced, effectively reducing the installation space reserved for the bus bar by the PTC heater.

[0043] In summary, the unique structural design of the present invention has significant technical effects, which can effectively reduce the installation space reserved for the PTC heater for the busbar, and at the same time make manufacturing and installation more convenient, effectively improve production efficiency, and reduce labor costs. After practical testing, the output power of the PTC heater is increased from 5 kilowatts to 10,000 watts, the number of PTC heating packs needs to be increased by 1 time, and the existing busbar needs to be increased by 1 time based on the original area, while the busbar of the present invention only needs to be increased by 0.5 times based on the original area, which greatly reduces the installation space reserved for the PTC heater for the busbar.

[0044] As a preferred embodiment of this embodiment, Figure 1 to Figure 4 As shown, the number of positive busbars 11 is set to one, and the number is changed from multiple in the prior art to one in the present invention, which effectively reduces the installation space reserved for the busbar by the PTC heater; a negative busbar 12 is set for each installation notch 3, which reduces the number of second conductive connecting plates 22, making the structure of the present invention simpler.

[0045] As a preferred embodiment of this embodiment, Figure 1 , Figure 2As shown, the extension direction of the other end of each second conductive connecting piece 22 is roughly the same, that is, they are all roughly facing the same direction. On the one hand, each second conductive connecting piece 22 does not interfere with each other and is easy to assemble. On the other hand, the error-proof design makes it easy to detect errors in the assembly of the second conductive connecting piece 22 in a short time. When the second conductive connecting piece 22 extends outward and is blocked by the position of the positive busbar 11, the second conductive connecting piece 22 turns to bypass the positive busbar 11 and continues to extend outward. Usually, when the positive busbar 11 and the negative busbar 12 are in the same horizontal plane, one end of the second conductive connecting piece 22 will be connected to the negative busbar 12, and the other end of the second conductive connecting piece 22 will extend outward and be blocked by the position of the positive busbar 11. At this time, in order to completely isolate the second conductive connecting piece 22 from the positive busbar 11 and to prevent a short circuit, an overhead structure design is adopted for the second conductive connecting piece 22, which continues to extend outward after bypassing the positive busbar 11. For details, see Figure 2 .

[0046] As a preferred embodiment of this embodiment, Figure 1 , Figure 2 As shown, the extension direction of the other end of the first conductive connecting piece 21 is substantially the same as the extension direction of the other end of the second conductive connecting piece 22, and the end of the other end of the first conductive connecting piece 21 is substantially on the same horizontal plane as the end of the other end of the second conductive connecting piece 22. On the one hand, the structural design makes the present invention simpler and more reasonable, and is convenient for production and installation; on the other hand, the error-proofing design makes it easy to detect errors in the assembly of the first conductive connecting piece 21 and the second conductive connecting piece 22 in a short time.

[0047] As a preferred embodiment of this embodiment, Figure 3 , Figure 4 As shown, the positive busbar 11 and the first conductive connecting piece 21 connected thereto are an integral structure; Figure 1 , Figure 2 As shown, the negative busbar 12 and the second conductive connecting piece 22 connected thereto are an integral structure, which avoids the problem of the busbar 1 and the conductive connecting piece 2 being separated during use of the existing busbar. In addition, the present invention is more convenient to produce and install, and improves work efficiency.

[0048] As a preferred embodiment of this embodiment, Figure 1 to Figure 4 As shown, in order to facilitate the positive terminal and the negative terminal of the PTC heating pack to be more firmly plugged into the busbar and ensure the stability of the electrical connection, the edge of the first plug hole 41 of the positive busbar 11 is provided with a plurality of first spring tongues 51 for plugging the positive terminal of the PTC heating pack (see Figure 3 , Figure 4); The edge of the second plug hole 42 of the negative busbar 12 is provided with a plurality of second spring tongues 52 for plugging the negative terminal of the PTC heating package (see Figure 1 , Figure 2 The first spring tongue 51 and the second spring tongue 52 are both spring tongues, which belong to the existing structural device, and are used to clamp and limit the positive terminal and the negative terminal of the PTC heating pack, so that the connection is more firm and stable.

[0049] As a preferred embodiment of this invention, Figure 11 to Figure 15 As shown, the present invention is also provided with an insulating cover plate, which is used in conjunction with the above-mentioned busbar for the PTC electric heater. The upper and lower surfaces of the busbar are provided with insulating covers for electrical insulation; usually the insulating cover plate is made of insulating rubber and plastic material, which plays a role of electrical insulation for the busbar 1 of the busbar, and also improves the anti-vibration ability and prolongs the service life of the busbar. The insulating cover plate is provided with an upper insulating cover plate 61 and a lower insulating cover plate 62. The upper insulating cover plate 61 is matched and arranged on the upper surface of the busbar 1 of the busbar, and the lower insulating cover plate 62 is matched and arranged on the lower surface of the busbar 1 of the busbar, and the busbar 1 of the busbar is matched and arranged between the upper insulating cover plate 61 and the lower insulating cover plate 62; usually, one end of the first conductive connecting plate 21 and the second conductive connecting plate 22 used for electrical connection to the PTC controller extends outside the upper insulating cover plate 61 and the lower insulating cover plate 62, so as to facilitate plugging with the PTC controller. The upper insulating cover plate 61 and the lower insulating cover plate 62 are connected by snap-fit ​​adapter; by Figure 1 to Figure 4 As shown, the positive busbar 11 and the negative busbar 12 are both provided with a first through hole 71, and the buckle passes through the first through hole 71 to match and connect the upper insulating cover plate 61 and the lower insulating cover plate 62; the buckle adapter connection is an existing connection method, Figure 5 , Figure 6 As shown, two relatively bent elastic cards 9 are usually connected to the lower insulating cover plate 62; Fig. 9 , Fig.10 As shown, the upper insulating cover plate 61 is provided with a card hole 10 corresponding to the upper and lower sides of the elastic card 9; Fig.11 , Fig.12 As shown, the elastic card 9 passes through the first through hole 71 and is buckled into the card hole 10 of the upper insulating cover plate 61. On the one hand, it is convenient for the upper insulating cover plate 61 and the lower insulating cover plate 62 to be installed and removed. On the other hand, it is convenient for the positive busbar 11 and the negative busbar 12 to limit the position, so as to avoid the phenomenon of deviation and contact during use and short circuit. Fig. 9 , Fig.10 As shown, the upper insulating cover plate 61 is provided with a second through hole 72 for the positive terminal or negative terminal of the PTC heating pack to pass through; Figure 5 , Figure 6As shown, the lower insulating cover plate 62 is provided with a third through hole 73 for the positive terminal or negative terminal of the PTC heating pack to pass through. Fig.13 As shown, in the space area where the positive busbar 11 is located, the second through hole 72, the third through hole 73 and the first plug hole 41 are arranged opposite to each other up and down, and the positive terminal of the PTC heating package passes through the third through hole 73, the first plug hole 41 and the second through hole 72 from the bottom to the top, wherein the positive terminal of the PTC heating package is electrically connected to the positive busbar 11 through the first plug hole 41, and the second through hole 72 and the third through hole 73 cooperate to play a role in positioning and guiding the positive terminal of the PTC heating package. In the space area where the negative busbar 12 is located, the second through hole 72, the third through hole 73 and the second plug hole 42 are arranged opposite to each other up and down, and the negative terminal of the PTC heating package passes through the third through hole 73, the second plug hole 42 and the second through hole 72 from the bottom to the top, wherein the negative terminal of the PTC heating package is electrically connected to the negative busbar 12 through the second plug hole 42, and the second through hole 72 and the third through hole 73 cooperate to play a role in positioning and guiding the negative terminal of the PTC heating package.

[0050] As a preferred embodiment of this embodiment, Figures 5 to 8 , Fig.13 , Fig.15 As shown, the lower insulating cover plate 62 is connected to a positioning plate 4, and the positioning plate 4 is arranged between the upper insulating cover plate 61 and the lower insulating cover plate 62; a concave through groove 5 is provided on the positioning plate 4, and the second conductive connecting plate 22 is arranged in the concave through groove 5; the positioning plate 4 is used to fix and limit the second conductive connecting plate 22 to prevent the second conductive connecting plate 22 from being offset and contacting the positive busbar 11 during use to cause a short circuit.

[0051] As a preferred embodiment of this embodiment, Figures 5 to 8 As shown, the lower insulating cover plate 62 is provided with a positioning groove 6 which is adapted in shape to the positive bus bar 11 and the negative bus bar 12. On the one hand, it is used to fix and limit the positive bus bar 11 and the negative bus bar 12 to prevent the phenomenon of offset contact and short circuit during use; on the other hand, it facilitates the installation of the positive bus bar 11 and the negative bus bar 12, saving time and effort and improving production efficiency.

[0052] As a preferred embodiment of this embodiment, Fig. 9 , Fig.10 , Fig.13 As shown, the upper insulating cover plate 61 is provided with a guide hole 7; Figure 5 , Figure 6 , Fig.13 As shown, the lower insulating cover plate 62 is connected with a guide column 8, and the guide column 8 is adapted to be connected with the guide hole 7, so as to facilitate the alignment and matching installation of the upper insulating cover plate 61 and the lower insulating cover plate 62, saving time and labor and improving production efficiency.

[0053] In the description of the present invention, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inside", "outside", "back", "middle", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying 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 of the present invention. It should be noted that in the above-mentioned embodiments, the "first", "second" and "third" do not represent an absolute distinction in structure and / or function, nor do they represent a sequential execution order, but are merely for the convenience of description.

[0054] However, what is described above is only a specific embodiment of the present invention and should not be used to limit the scope of implementation of the present invention. Therefore, the replacement of equivalent components, or equivalent changes and modifications made according to the scope of protection of the present invention should still fall within the scope covered by the claims of the present invention.

Claims

1. A busbar assembly for a PTC electric heater, comprising a busbar, a busbar having a busbar, and a conductive connecting sheet connected to the busbar, wherein the busbar has a positive busbar and a negative busbar, and the positive busbar is completely isolated from the negative busbar; characterized in that: The positive busbar is provided with a first socket for plug-in electrical connection of the positive terminal of the PTC heating pack, and the negative busbar is provided with a second socket for plug-in electrical connection of the negative terminal of the PTC heating pack; the conductive connecting piece is provided with a first conductive connecting piece and a second conductive connecting piece; one end of the first conductive connecting piece is electrically connected to the positive busbar, and the other end of the first conductive connecting piece extends outwardly for electrical connection to the positive terminal of the current output circuit of the PTC controller; one end of the second conductive connecting piece is electrically connected to the negative busbar, and the other end of the second conductive connecting piece extends outwardly The positive busbar is provided with a mounting notch, the mounting notch is provided with a longitudinal through slot and a longitudinal through hole, the positive busbar is provided with the longitudinal through slot on the side at the edge thereof, and the positive busbar is provided with the longitudinal through hole inside thereof; the negative busbar is arranged in the mounting notch, each of the negative busbars is connected with a second conductive connecting piece, and the other end of the second conductive connecting piece connected to the negative busbar passes through the top or bottom of the positive busbar and extends outward; The number of the positive busbars is set to one, and each installation notch is provided with one negative busbar; The positive electrode busbar and the first conductive connecting piece connected thereto are an integral structure; the negative electrode busbar and the second conductive connecting piece connected thereto are an integral structure.

2. A busbar assembly for a PTC electric heater according to claim 1, characterized in that: The extension direction of the other end of each second conductive connecting piece is substantially the same; when the second conductive connecting piece is blocked by the position of the positive bus bar when extending outward, the second conductive connecting piece turns around and bypasses the positive bus bar and continues to extend outward.

3. A busbar assembly for a PTC electric heater according to claim 2, characterized in that: The other end of the first conductive connecting sheet extends in substantially the same direction as the other end of the second conductive connecting sheet, and the other end of the first conductive connecting sheet and the other end of the second conductive connecting sheet are substantially on the same horizontal plane.

4. A busbar assembly for a PTC electric heater according to any one of claims 1 to 3, characterized in that: A plurality of first spring tongues for plugging the positive terminal of the PTC heating pack are arranged at the edge of the first socket; a plurality of second spring tongues for plugging the negative terminal of the PTC heating pack are arranged at the edge of the second socket.

5. A busbar assembly for a PTC electric heater according to any one of claims 1 to 3, characterized in that: It is also provided with an insulating cover plate, which is used in conjunction with the busbar for the PTC electric heater, and the upper and lower surfaces of the busbar are both provided with the insulating cover plate for electrical insulation; the insulating cover plate is provided with an upper insulating cover plate and a lower insulating cover plate, the upper insulating cover plate is arranged on the upper surface of the busbar, and the lower insulating cover plate is arranged on the lower surface of the busbar, and the upper insulating cover plate and the lower insulating cover plate are connected by snap-fitting; the positive busbar and the negative busbar are both provided with a first through hole, and the snap passes through the first through hole; the upper insulating cover plate is provided with a second through hole for the positive terminal or the negative terminal of the PTC heating pack to pass through, and the lower insulating cover plate is provided with a third through hole for the positive terminal or the negative terminal of the PTC heating pack to pass through; in the space area where the positive busbar is located, the second through hole, the third through hole and the first socket are arranged opposite to each other up and down; in the space area where the negative busbar is located, the second through hole, the third through hole and the second socket are arranged opposite to each other up and down.

6. A busbar assembly for a PTC electric heater according to claim 5, characterized in that: The lower insulating cover plate is connected with a positioning plate, and the positioning plate is arranged between the upper insulating cover plate and the lower insulating cover plate; the positioning plate is provided with a concave through groove, and the second conductive connecting piece is arranged in the concave through groove.

7. A busbar assembly for a PTC electric heater according to claim 5, characterized in that: The lower insulating cover plate is provided with positioning grooves adapted to the positive busbar and the negative busbar.

8. The busbar assembly for a PTC electric heater according to claim 5, characterized in that: The upper insulating cover plate is provided with a guide hole, and the lower insulating cover plate is connected with a guide column, and the guide column is adaptively connected with the guide hole.

Images