NTC (Negative Temperature Coefficient) fixing structure applied to energy storage battery and power battery

Abstract

The utility model discloses an NTC (Negative Temperature Coefficient) fixing structure applied to an energy storage battery and a power battery. The NTC fixing structure comprises a clamping tongue and a limiting rib, the clamping tongue and the limiting rib are positioned on the injection molding isolation plate; an NTC arrangement groove is formed in the injection molding isolation plate, and the two clamping tongues are symmetrically distributed on the left side and the right side of the NTC arrangement groove; the limiting ribs are located on the front side of the NTC arrangement groove and protrude out of the surface of the injection molding isolation plate. The clamping tongue and the limiting rib are ingeniously designed, and the NTC is stably fixed through the reinforcing plate structure under the action of the clamping tongue and the limiting rib. Compared with a traditional fixing scheme, the fixing structure is more flexible, the space area is effectively saved, fixing operation is easy and convenient, and the fixing structure has the advantages of being suitable for large-scale production and reducing the equipment development input cost.

Description

Technical Field

[0001] This utility model relates to fixing structures, and more particularly to an NTC fixing structure applied to energy storage batteries and power batteries. Background Technology

[0002] In the CCS (Cells Contact System) system, the NTC (Negative Temperature Coefficient) is a temperature sensor used to monitor temperature conditions, aiming to improve the safety, reliability, and efficiency of the battery system.

[0003] In a CCS system, the NTC (Nearest Temperature Coefficient) sensor is fixed using various techniques to ensure accurate temperature measurement and data transmission. These fixing methods include ultrasonic welding, bolting, laser pulse welding, and TIG welding. Ultrasonic welding is a common method that uses ultrasonic waves to weld the voltage sampling busbar to the surface of the battery cell busbar, while bolts are used to fix the temperature sensor to the CMC (Cold Molded Molded Part). Laser pulse welding directly welds the sampling busbar to the surface of the battery cell busbar and is suitable for FPC (Flexible Printed Circuit) technology. TIG welding uses argon gas protection for high-energy welding to ensure the stability and reliability of the connection.

[0004] Each of the above methods has its own drawbacks. Ultrasonic welding and bolt fixing are simple to operate and suitable for large-scale production, but require strict control of welding quality and subsequent pull-out force testing, making the NTC fixing process relatively cumbersome. Laser pulse welding and TIG welding, while offering high precision, have higher equipment costs and are suitable for demanding applications, but not for large-scale production. Utility Model Content

[0005] To address the shortcomings of the aforementioned technologies, this invention provides an NTC fixing structure applicable to energy storage batteries and power batteries.

[0006] To solve the above technical problems, the technical solution adopted by this utility model is: an NTC fixing structure applied to energy storage batteries and power batteries, the NTC fixing structure including a latch and limiting ribs;

[0007] The latch and limiting ribs are both located on the injection-molded isolation plate;

[0008] The injection-molded isolation plate has an NTC setting slot, and there are two sets of latches, which are symmetrically distributed on the left and right sides of the NTC setting slot.

[0009] A set of limiting ribs is provided, which are located on the front side of the NTC setting groove and protrude from the surface of the injection molded isolation plate.

[0010] Preferably, an FPC is fixed on the injection-molded isolation plate, and the FPC is welded to the NTC.

[0011] Preferably, the NTC is fixed around its perimeter with a reinforcing plate, and the reinforcing plate has an opening groove, with the NTC located at the opening groove.

[0012] Preferably, the latch is inverted L-shaped and has a slot-like notch for inserting the reinforcing plate during assembly.

[0013] Preferably, the FPC is fixed to the injection-molded isolation plate by positioning hot rivets.

[0014] Preferably, the FPC has fixing holes, and the positioning hot rivets pass through the fixing holes and are hot-riveted to the injection-molded isolation plate.

[0015] Preferably, a thermal pad is fixed to the back side of the FPC where the NTC mounting slot is located.

[0016] This utility model discloses an NTC fixing structure for energy storage batteries and power batteries. It cleverly incorporates a latch and limiting ribs, allowing the NTC to be securely fixed using a reinforcing plate structure under the action of the latch and limiting ribs. Compared to traditional fixing methods, this novel fixing structure is more flexible, effectively saving space and simplifying the fixing operation. It offers advantages such as suitability for mass production and reduced equipment development costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 for Figure 1 The main view.

[0019] Figure 3 for Figure 1 Rear view.

[0020] Figure 4 for Figure 1 A schematic diagram of the structure of the injection-molded isolation plate.

[0021] In the diagram: 1. Injection molded partition plate; 2. FPC; 3. Reinforcing plate; 4. NTC; 5. Thermal pad; 6. Positioning hot rivet; 7. Tongue; 8. Limiting rib; 9. Opening groove; 10. NTC setting groove; 11. Slot-type notch. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0023] This utility model discloses an NTC fixing structure applicable to energy storage batteries and power batteries, such as Figure 1-4As shown, the NTC fixing structure mainly includes a latch 7 and a limiting rib 8; the NTC is stably fixed by the reinforcing plate structure under the action of the latch and the limiting rib.

[0024] First, such as Figure 1 As shown, an FPC2 is fixed on the injection-molded isolation plate 1. FPC (Flexible Printed Circuit) is a flexible printed circuit board. A section of the circuit board structure extends from FPC2 and is soldered to NTC4 to achieve temperature monitoring and optimization of the battery management system.

[0025] Preferably, the FPC2 is fixed to the injection-molded partition plate 1 by a hot riveting process. Hot riveting is a common electronic assembly technology, which involves heating and expanding the positioning rivets 6 to bond them with the substrate, thereby achieving fixation. Specifically, fixing holes are provided on the FPC2, and the positioning rivets 6 pass through the fixing holes and are then hot-riveted to the injection-molded partition plate, thus fixing the FPC and ensuring that it will not shift under stress after being fixed.

[0026] Secondly, reinforcing plates 3 are fixed around the NTC4. These reinforcing plates primarily enhance the structural strength, dispersing stress and preventing deformation or breakage of the circuit board under load. The design of the reinforcing plates in this invention takes into account the NTC's fixing requirements; the structural characteristics of the reinforcing plates allow for convenient fixing of the NTC.

[0027] After the NTC and FPC are welded together, the reinforcing plate 3 is pressed onto the FPC, and then glue is used to fix the reinforcing plate 3 and the FPC to enhance the strength of the FPC at that location and restrict the flow of NTC glue, ensuring that the glue completely covers the NTC. Accordingly, an opening groove 9 is provided on the reinforcing plate 3 so that the NTC 4 is located at the opening groove 9, and then NTC glue is applied at the opening groove 9.

[0028] Furthermore, both the latch 7 and the limiting rib 8 are located on the injection-molded isolation plate 1 and are integrally injection molded with the injection-molded isolation plate 1.

[0029] like Figure 1 or Figure 4 As shown, an NTC mounting groove 10 is provided on the injection molded isolation plate 1, and the latch 7 and the limiting rib 8 are distributed around the NTC mounting groove 10 of the injection molded isolation plate 1.

[0030] The latch 7 is a crucial part of the NTC fixing structure design on the isolation plate. Two sets of latches 7 are symmetrically distributed on the left and right sides of the NTC mounting slot 10. Furthermore, the latches 7 are inverted L-shaped and have slot-type notches 11. The reinforcing plate 3 is assembled and inserted into the latches 7 through the slot-type notches 11 for fixation. Therefore, this insert-type method not only improves the convenience of NTC fixing assembly but also ensures precise alignment between the reinforcing plate and the injection-molded isolation plate.

[0031] The limiting rib 9 is another key component of the NTC fixing structure design on the isolation plate. The limiting rib 8 is located on the front side of the NTC mounting groove 10 and protrudes from the surface of the injection-molded isolation plate 1, serving as a limiting and blocking function. After the FPC is fixed by the positioning hot rivets, the limiting rib 8 and the hot rivet points of the FPC are combined to form a multi-point fixing system, further enhancing the stability of the FPC in the Y-axis direction.

[0032] In addition, such as Figure 3 As shown, preferably, a thermal pad 5 is fixed to the back side of the FPC2 located at the NTC mounting slot 10 to improve heat dissipation efficiency and maintain the stability and reliability of the CCS system.

[0033] In summary, the NTC fixing structure disclosed in this utility model, applied to energy storage batteries and power batteries, utilizes the cooperation of the latches and limiting ribs on the reinforcing plate and the separator plate, combined with FPC hot riveting, to achieve stable fixing of the NTC and FPC. The latches not only fix the reinforcing plate but also provide additional support and fixation in the Z-axis (vertical) and X-axis (horizontal) directions, further improving the fixing stability of the NTC and the connected FPC. Simultaneously, the FPC is fixed to the injection-molded separator plate by hot riveting, with the hot riveting points combined with the limiting ribs, further enhancing the fixing stability in the Y-axis direction. Thus, through the ingenious design of the latches, limiting ribs, and hot riveting points, the NTC and FPC are fixed in the X, Y, and Z-axis directions, ensuring the stability and reliability of the NTC and FPC fixing through multiple fixing methods.

[0034] Compared with existing technologies, it has the following technological advantages:

[0035] 1) The clever design combines latches, limiting ribs, and hot riveting points, resulting in high structural strength. Multiple fixing methods ensure the stability and reliability of NTC and FPC fixing.

[0036] 2) The NTC fixing structure is ingenious, and the assembly and fixing operation is simple and convenient, reducing the difficulty of mass production. Moreover, it does not require high-cost equipment, reducing investment and manufacturing costs, and has wide applicability.

[0037] 3) Reduced space requirements for NTC mounting. Due to better fit of various structures, space can be effectively saved, creating more structural layout space for new energy power battery modules and helping to improve the energy density of PACK.

[0038] The above embodiments are not intended to limit the present utility model, nor is the present utility model limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the technical solution of the present utility model are also within the protection scope of the present utility model.

Claims

1. An NTC fixing structure for use in energy storage batteries and power batteries, characterized in that: The NTC fixing structure includes a latch (7) and a limiting rib (8). The latch (7) and the limiting rib (8) are both located on the injection-molded isolation plate (1); The injection-molded isolation plate (1) is provided with an NTC setting groove (10), and there are two sets of latches (7). The two sets of latches (7) are symmetrically distributed on the left and right sides of the NTC setting groove (10). The limiting ribs (8) are provided in a set, and the limiting ribs (8) are located on the front side of the NTC setting groove (10) and protrude from the surface of the injection molded isolation plate (1).

2. The NTC fixing structure applied to energy storage batteries and power batteries according to claim 1, characterized in that: An FPC (2) is fixed on the injection-molded isolation plate (1), and the FPC (2) is welded to the NTC (4).

3. The NTC fixing structure applied to energy storage batteries and power batteries according to claim 2, characterized in that: The NTC (4) is fixed with a reinforcing plate (3) around its perimeter. The reinforcing plate (3) has an opening groove (9) on it, and the NTC (4) is located at the opening groove (9).

4. The NTC fixing structure applied to energy storage batteries and power batteries according to claim 3, characterized in that: The latch (7) is inverted L-shaped and has a slot-type notch (11) for the insertion of the reinforcing plate (3) during assembly.

5. The NTC fixing structure applied to energy storage batteries and power batteries according to claim 2, characterized in that: The FPC (2) is fixed to the injection-molded isolation plate (1) by positioning hot rivets (6).

6. The NTC fixing structure applied to energy storage batteries and power batteries according to claim 5, characterized in that: The FPC (2) has a fixing hole, and the positioning hot rivet (6) passes through the fixing hole and is fixed to the injection molded isolation plate by hot riveting.

7. The NTC fixing structure applied to energy storage batteries and power batteries according to claim 2, characterized in that: A thermal pad (5) is fixed to the back side of the FPC (2) located at the NTC mounting slot (10).

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