High-voltage platform PTC heating core assembly

Abstract

The utility model discloses a PTC (Positive Temperature Coefficient) heating core assembly of a high-voltage platform. The utility model relates to a multi-core electric heater, which comprises a plurality of heating cores and radiating fins which are sequentially and alternately arranged, the upper parts of the heating cores extend to form electrode parts, the electrode parts are connected through a bus plate, a plurality of bus bars are arranged on the bus plate, the electrode parts of the plurality of heating cores are divided into two groups which are independently connected in parallel by the bus bars, and the two groups are connected in series. The heating core comprises a flat tube, a heating plate arranged in the flat tube and electrode plates arranged on the two sides of the heating plate; the upper end of the flat tube is provided with a plug, and the plug is provided with a through hole for the electrode part of the electrode piece to extend out. The utility model has the advantages that: the heating cores are grouped and then connected in series, and the pressure-resistant strength required by the heating cores is reduced by utilizing a partial pressure principle, so that an aluminum oxide substrate of the heater can be omitted, the product weight is reduced, the cost is also reduced, and the wind resistance and noise are reduced; and a bus board and a bus electrode are arranged, so that cable integration and current centralized distribution management are realized, and overload protection is provided.

Description

Technical Field

[0001] This utility model relates to a PTC heater, specifically a high-voltage platform PTC heating core assembly. Background Technology

[0002] With the development of the times, new energy vehicles are playing an increasingly important role in social transportation and have gradually become the mainstream of the automotive market. In order to improve charging efficiency, reduce vehicle current, and reduce costs, more and more car companies are adopting the 800V platform architecture. For PTC heaters, this means facing problems such as increased creepage distance and higher PTC sheet withstand voltage requirements. Therefore, heaters need to add alumina substrate to improve withstand voltage strength, which will lead to increased weight, increased cost, increased wind resistance, and increased PTC sheet noise. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a high-voltage platform PTC heating core assembly that is lightweight, low-cost, has low wind resistance, and low noise.

[0004] To solve the above-mentioned technical problems, the high-voltage platform PTC heater of this utility model includes multiple heating cores and heat dissipation fins arranged alternately in sequence. The upper part of each heating core extends out to form an electrode portion, which is connected by a busbar. The busbar is provided with multiple busbars, which divide the electrode portions of the multiple heating cores into two independent parallel groups, and the two groups are connected in series.

[0005] The number of busbars is three. The first electrode of the heating core in the first group is connected in series through busbar one. The second electrode of the heating core in the second group is connected in series through busbar two. The second electrodes of the two groups of heating cores are connected in series through busbar three.

[0006] The heating core includes a flat tube, a heating element disposed inside the flat tube, and electrode plates disposed on both sides of the heating element; a plug is provided at the upper end of the flat tube, and a through hole is provided on the plug for the electrode portion of the electrode plate to extend out.

[0007] The busbar is provided with busbar electrodes.

[0008] An auxiliary component is fitted onto the upper end of the heating core.

[0009] The auxiliary component is a sealing gasket.

[0010] The auxiliary component is a positioning plate.

[0011] The heating element is made of ceramic.

[0012] The electrode sheet is made of copper.

[0013] The flat tube and the heat dissipation fins are made of aluminum.

[0014] The advantages of this invention are: by grouping the heating cores and connecting them in series, the required pressure resistance of the heating cores is reduced by using the voltage divider principle, which allows the heater to eliminate the need for an alumina substrate, thereby reducing the product weight and cost, while also reducing wind resistance and noise; the inclusion of a busbar and busbar electrodes enables the integration of cables and centralized distribution and management of current, and provides overload protection. Attached Figure Description

[0015] Figure 1 This is an exploded view of the present invention;

[0016] Figure 2 This is a top view of the present invention;

[0017] Figure 3 This is a circuit connection diagram of the present invention;

[0018] Figure 4 This is a schematic diagram illustrating the principle of this utility model. Detailed Implementation

[0019] The high-voltage platform PTC heating core assembly of this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] like Figure 1 , 2 As shown, the high-voltage platform PTC heating core assembly of this utility model includes multiple heating cores 1 arranged alternately in sequence and aluminum heat dissipation fins 2. The heating core 1 includes an aluminum flat tube 5, a ceramic heating element 6 disposed inside the flat tube 5, and copper electrode plates 7 disposed on both sides of the heating element 6. A plug 8 is provided at the upper end of the flat tube 5, and a through hole is opened on the plug 8 for the electrode part of the electrode plate 7 to extend out. After the electrode part extends out of the through hole, it is connected through a busbar 3. The busbar 3 is provided with multiple busbars 4, which divide the electrode parts of the multiple heating cores 1 into two independent parallel groups, and the two groups are connected in series. An auxiliary element 10 is also sleeved on the upper end of the flat tube 5, such as a sealing gasket for improving sealing performance, or a positioning plate for providing positioning for the busbar 3.

[0021] like Figure 3 As shown, in this embodiment, the six heating cores 1 have a total of twelve electrodes, I-XII. The busbar 3 uses three busbars 4 to divide the twelve electrodes into three groups (3+3+6) from top to bottom and left to right (i.e., I, II, III form one group; IV, V, VI form another group; and VII-XII form a third group). This results in the three heating cores 1 on the left being connected in parallel, and the three heating cores 1 on the right also being connected in parallel. The two groups are connected in series through the connection of electrodes IX and X, thus achieving voltage division. The principle is as follows: Figure 4 As shown, this circuit utilizes the voltage divider principle, where the voltage across each resistor in a series circuit is the same, and the sum of these voltages equals the total circuit voltage. By ensuring R1 / R2 = R3 / R4, the original 800V voltage can be divided into 400V. In practical applications, the number of heating elements 1 allocated to each group can be adjusted to achieve different voltages for each group, depending on specific needs. The busbar 3 also features two busbar electrodes 9 on the left and right sides to consolidate multiple electrodes. The left busbar electrode 9 connects to the busbar 4 containing electrodes I-III, and the right busbar electrode 9 connects to the busbar 4 containing electrodes IV-VI. These two busbar electrodes 9 are then connected to high-voltage wiring harnesses, thus achieving cable integration and centralized current distribution management, and providing overload protection.

[0022] Of course, the above description is not intended to limit the present invention, and the present invention is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A high-voltage platform PTC heating core assembly, characterized in that: It includes multiple heating cores (1) and heat dissipation fins (2) arranged alternately in sequence. The upper part of the heating core (1) has an electrode part, which is connected by a busbar (3). The busbar (3) is provided with multiple busbars (4). The busbars (4) divide the electrode parts of the multiple heating cores (1) into two independent parallel groups, and the two groups are connected in series.

2. The high-voltage platform PTC heating core assembly according to claim 1, characterized in that: The number of busbars (4) is three. The first electrode of the first group of heating cores (1) is connected in series through busbar one. The second electrode of the second group of heating cores (1) is connected in series through busbar two. The second electrodes of the two groups of heating cores (1) are connected in series through busbar three.

3. The high-voltage platform PTC heating core assembly according to claim 1, characterized in that: The heating core (1) includes a flat tube (5), a heating element (6) disposed inside the flat tube (5), and electrode plates (7) disposed on both sides of the heating element (6); a plug (8) is provided at the upper end of the flat tube (5), and a through hole is opened on the plug (8) for the electrode part of the electrode plate (7) to extend out.

4. The high-voltage platform PTC heating core assembly according to claim 1, 2 or 3, characterized in that: The busbar (3) is provided with a busbar electrode (9).

5. The high-voltage platform PTC heating core assembly according to claim 1, 2 or 3, characterized in that: An auxiliary element (10) is sleeved on the upper end of the heating core (1).

6. The high-voltage platform PTC heating core assembly according to claim 5, characterized in that: The auxiliary element (10) is a sealing gasket.

7. The high-voltage platform PTC heating core assembly according to claim 5, characterized in that: The auxiliary element (10) is a positioning plate.

8. The high-voltage platform PTC heating core assembly according to claim 3, characterized in that: The heating element (6) is made of ceramic.

9. The high-voltage platform PTC heating core assembly according to claim 3, characterized in that: The electrode sheet (7) is made of copper.

10. The high-voltage platform PTC heating core assembly according to claim 3, characterized in that: The flat tube (5) and the heat dissipation fins (2) are made of aluminum.

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