Novel NTC (Negative Temperature Coefficient) integrated fixing structure on power battery and energy storage battery

Abstract

The utility model discloses a novel NTC (Negative Temperature Coefficient) integrated fixing structure on a power battery and an energy storage battery, which comprises a thin film and a plurality of groups of aluminum bars oppositely arranged on the thin film, the flexible circuit board is positioned between each group of aluminum bars; the NTC is arranged at the tail end of the aluminum bar and is connected with the aluminum bar through an integrated injection molding piece; the integrated injection molding piece comprises a supporting part connected with the NTC and a limiting part connected with the aluminum bar, and the supporting part and the limiting part are integrally formed. According to the utility model, the hot-pressed film, the aluminum bar and the integrated injection molding piece are connected, a common NTC support and an FR4 structure used on an FPC are canceled, the original support function and the FR4 function are combined into one, the product cost is reduced, the space which can be designed and used by a CCS assembly is also released, the operation steps of original support loading and hot riveting fixation are reduced, and the production efficiency is improved. And the CCS assembling efficiency is improved, and the application range is wide.

Description

TECHNICAL FIELD

[0001] The utility model relates to a novel NTC integrated fixing structure, especially to a novel NTC integrated fixing structure on a power battery and an energy storage battery, and belongs to the technical field of CCS assembly. BACKGROUND

[0002] With the rapid development of new energy vehicles, the weight and cost requirements of automobile parts are becoming more and more demanding, and as a main component of new energy vehicles, new energy power battery modules will play a key role in weight reduction and cost reduction. The CCS assembly is an important component of the new energy power battery module. Due to the cost reduction and efficiency improvement of electrical insulation, the traditional NTC fixing structure is changed to a product process and material strength limit of thin film or plastic isolation plate, which cannot be effectively fixed, and an additional injection molding structure is needed to fix the bottom structure of the two connecting aluminum bars. After the NTC assembly is assembled with the rivet column on the injection molding structure, the rivet is heated to realize fixed connection. For such a top cover collection type NTC assembly fixing, this method not only has the cost of additional structure, but also increases a bracket placement process. If the product fixing method is single-sided thin film or the design space is insufficient, it may not be realized.

[0003] Therefore, it is necessary to provide a novel NTC integrated fixing structure on a power battery and an energy storage battery to solve the above technical problems. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the above technical problems, the utility model provides a novel NTC integrated fixing structure on a power battery and an energy storage battery, which replaces the traditional NTC bracket cooperating with FR4 hot riveting fixing CCS scheme through a novel integrated structure.

[0005] In order to solve the above technical problems, the utility model adopts the technical scheme of: a novel NTC integrated fixing structure on a power battery and an energy storage battery, comprising:

[0006] A thin film, a plurality of groups of aluminum bars are arranged opposite to each other on the thin film;

[0007] A flexible circuit board is arranged between each group of aluminum bars;

[0008] An NTC is arranged at the end of the aluminum bar, and the NTC is connected with the aluminum bar through an integrated injection molding part;

[0009] The integrated injection molding part comprises a supporting part connected with the NTC and a limiting part connected with the aluminum bar, and the supporting part and the limiting part are integrally formed.

[0010] Preferably, the supporting part is a cuboid, one end of which extends in the vertical direction and then bends in the horizontal direction to form the limiting part, and a placement space is formed between the supporting part and the limiting part.

[0011] Preferably, the limiting part comprises two limiting rods arranged at intervals, and the free ends of the limiting rods are formed with protrusions extending towards the supporting part.

[0012] Preferably, the front end of the aluminum bar is formed with an insertion section matching the placement space between the supporting part and the limiting part.

[0013] Preferably, two positioning holes matched with the protrusions are formed on the side of the insertion section away from the supporting part, and the protrusions are matched and embedded in the positioning holes.

[0014] Preferably, the height of the protrusion is the same as the height of the positioning hole.

[0015] Preferably, the surface of the NTC is provided with a heat-conducting pad, and the bottom surface is connected with the surface of the supporting part.

[0016] The utility model provides a novel NTC integrated fixing structure on power battery and energy storage battery, through connecting heat compression film, aluminum bar and integrated injection molding piece, cancels the NTC support and FR4 structure used on FPC commonly, combines the original support function and FR4 function into one, reduces the cost of product, also releases the space that CCS assembly can design uses, reduces the original support loading and hot riveting fixed operation step, improves the efficiency of CCS assembly, and the application range is wide. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is the whole structure schematic diagram of the utility model.

[0018] Figure 2 It is the local enlarged structure schematic diagram. Figure 1

[0019] Figure 3 It is the F-F cross section structure schematic diagram. Figure 2

[0020] Figure 4 It is the back structure schematic diagram of integrated injection molding piece.

[0021] Figure 5 It is the connection structure schematic diagram of integrated injection molding piece.

[0022] Figure 6 It is the D-D cross section structure schematic diagram. Figure 2

[0023] In the drawing: 1, film; 2, flexible circuit board; 3, aluminum bar; 4, integrated injection molding piece; 5, heat-conducting pad; 6, NTC; 31, insertion section; 32, positioning hole; 41, supporting part; 42, limiting part; 43, limiting rod; 44, protrusion. DETAILED DESCRIPTION​​​

[0024] The utility model will be explained further in detail below in combination with the drawings and specific embodiments.

[0025] Embodiment 1

[0026] As shown in Figure 1 , Figure 2 A novel NTC integrated fixing structure on a power battery and an energy storage battery, comprising:

[0027] A plurality of groups of aluminum bars 3 are oppositely arranged on the film 1.

[0028] A flexible circuit board 2 is arranged between each group of aluminum bars 3.

[0029] An NTC 6 is mounted at the end of the aluminum bar 3, and the NTC 6 is connected to the aluminum bar 3 through an integrated injection molding part 4.

[0030] As shown in Figure 4 , the integrated injection molding part 4 includes a support part 41 connected to the NTC and a limiting part 42 connected to the aluminum bar, and the support part 41 and the limiting part 42 are integrally formed.

[0031] The integrated injection molding part is used to replace the conventional FR4 structure, and the connection between the FPC and the injection molding part is realized by hot pressing.

[0032] As a preferred embodiment, the support part 41 is a cuboid, one end of which extends in the vertical direction and then bends in the horizontal direction to form the limiting part 42, and a placement space is formed between the support part 41 and the limiting part 42. The support part is used to connect to the NTC, and the limiting part is used to connect to the aluminum bar. The cavity between the support part 41 and the limiting part 42 realizes stable connection with the aluminum bar, finally replacing the original FR4 structure and achieving the overall weight reduction requirement.

[0033] As shown in Figure 5 , the limiting part 42 includes two limiting rods 43 arranged at intervals, and the free ends of the limiting rods 43 are formed with protrusions 44 extending towards the support part. The height of the protrusion 44 is the same as the height of the positioning hole 32.

[0034] In order to improve the connection stability, the protrusions are formed at the free ends of the limiting rods, which not only facilitates installation but also improves the connection stability. As a preferred embodiment, the two limiting rods are located at the two ends of the support part.

[0035] Further, the front end of the aluminum bar 3 forms an insertion section 31, which is matched and inserted into the placement space between the support part 41 and the limiting part 42.

[0036] The insertion section 31 is provided with two positioning holes 32 matched with the protrusions on the side away from the support part, and the protrusions 44 are matched and embedded in the positioning holes. By using the assembly structure of the integrated injection molding part, the aluminum bar with the positioning holes is matched to realize accurate positioning installation;

[0037] As shown in Figure 3 、 Figure 6 , the surface of the NTC6 is provided with a heat-conducting pad 5, and the bottom surface is connected with the surface of the support part 41.

[0038] The utility model effectively avoids the failure risk caused by NTC support installation and hot riveting fixation, effectively improves the fitting of each accessory of the CCS assembly, makes the structure more coherent and simple, creates more structure arrangement space for the new energy power battery module, realizes the weight reduction and cost reduction of the CCS assembly by the novel CCS structure instead of the CCS scheme of the traditional NTC support cooperation FR4 hot riveting fixation, and provides effective support for the weight reduction and cost saving of the new energy power battery module.

[0039] Compared with the prior art, the utility model has the following advantages:

[0040] 1) the novel CCS assembly temperature acquisition structure instead of the NTC support cooperation FR4 hot riveting fixation structure realizes the overall weight reduction demand of the CCS assembly;

[0041] 2) cancel the NTC support fixation structure and use the novel structure to improve the integrity of the CCS product, and reduce the fixing space required by the NTC assembly of the CCS assembly;

[0042] 3) novel structure, convenient and fast, saves time, reduces process, and reduces cost;

[0043] 4) reduces the risk of scalding and damaging NTC caused by hot riveting fixation of NTC support;

[0044] 5) highly adaptive CCS industry electrical insulation parts reduce cost, lightweight, etc. (injection molding-suction molding-double-sided hot pressing-single-sided hot pressing) under the use demand of the trend environment.

[0045] Nomenclature:

[0046] FPC / FFC: flexible circuit board, voltage, power supply, temperature acquisition signal;

[0047] FR4: glass fiber plate, high strength insulation and physical protection;

[0048] NTC: temperature sensor, confirms the environment temperature by the influence of thermal conductivity on resistance value;

[0049] NTC support: when the strength of electrical insulation part is insufficient, use injection molding part with fixed NTC structure;

[0050] Thermal pad: excellent performance of heat conduction silicone;

[0051] Film: PET film material, which plays the role of electrical insulation and fixed connection;

[0052] Aluminum bar: pure aluminum material, which is used for connecting battery cell to transmit current.

[0053] The above embodiments are not a limitation of the present application, and the present application is not limited to the above examples. Changes, modifications, additions or replacements made by the skilled in the art within the technical solution range of the present application also belong to the protection scope of the present application.

Claims

1. A novel NTC integrated fixing structure on power batteries and energy storage batteries, characterized in that: The utility model relates to a kind of flexible circuit board and NTC integrated injection molding piece, including: thin film (1), the thin film (1) is provided with multiple groups of aluminium bar (3) in opposite arrangement; Flexible circuit board (2) between each group of aluminium bar (3); NTC (6) is installed in the end of aluminium bar (3), and the NTC (6) is connected with aluminium bar (3) by integrated injection molding piece (4); The integrated injection molding piece (4) includes support part (41) connected with NTC and limiting part (42) connected with aluminium bar, and support part (41) and limiting part (42) are integrally formed. The support part (41) is cuboid, and one end of the support part (41) extends in vertical direction and then bends in horizontal direction to form limiting part (42), and placement space is formed between the support part (41) and the limiting part (42).

2. The new type of NTC integrated fixing structure on power battery and energy storage battery according to claim 1, characterized in that: The limiting part (42) includes two limiting rods (43) arranged at intervals, and the free end of the limiting rod (43) is formed with a protrusion (44) extending towards the support part.

3. The new type of NTC integrated fixing structure on power battery and energy storage battery according to claim 1, characterized in that: The front end of the aluminium bar (3) forms an insertion section (31), and the insertion section (31) is matched and inserted into the placement space between the support part (41) and the limiting part (42).

4. The new type of NTC integrated fixing structure on power battery and energy storage battery according to claim 1, characterized in that: Two positioning holes (32) matched with the protrusions are formed on the side of the insertion section (31) away from the support part, and the protrusions (44) are matched and embedded in the positioning holes.

5. The new type of NTC integrated fixing structure on power battery and energy storage battery according to claim 4, characterized in that: The height of the protrusion (44) is the same as the height of the positioning hole (32).

6. The new type of NTC integrated fixing structure on power battery and energy storage battery according to claim 5, characterized in that: The surface of the NTC (6) is provided with a heat-conducting pad (5), and the bottom surface is connected with the surface of the support part (41).

7. The new type of NTC integrated fixing structure on power battery and energy storage battery according to claim 1, characterized in that: ​

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