Integrated cover plate structure and battery module

Abstract

The utility model discloses an integrated cover plate structure and battery module, be located the top of electric core, include: electrical pressure plate, the window is set up in the position of corresponding electric core temperature collection, flexible circuit board, at least partial with electrical pressure plate fixed, at least partial extension to the window, temperature collection element, be located the one side of flexible circuit board away from electric core, temperature sensing reinforcing plate, be located the one side of flexible circuit board away from electric core, and temperature sensing reinforcing plate's middle part has the accommodation port for accommodating temperature collection element, and temperature sensing reinforcing plate is fixed with electrical pressure plate. The utility model shortens the heat transfer path, reduced the loss of temperature signal in the transmission process, and avoided the interference of pole piece self heating to temperature measurement, improved the accuracy and response speed of temperature collection, further through the accommodation port of temperature sensing reinforcing plate to temperature collection element form the package replaced traditional point gum and plastic part positioning mode, reduced the material type and assembly procedure, reduced the production cost.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to an integrated cover plate structure and a battery module. Background Technology

[0002] Against the backdrop of increasingly stringent global energy structure transformation and environmental protection requirements, the new energy vehicle industry has entered a stage of rapid development. As a core component of pure electric vehicles, power batteries must balance energy density, reliability, safety, cost control, and manufacturing feasibility within a limited space, which has become one of the key challenges for their widespread application in the automotive field.

[0003] Currently, the integrated cover plate assembly used in conventional battery modules has the following technical shortcomings in temperature acquisition:

[0004] 1. The temperature acquisition of the integrated cover plate assembly of the conventional group is achieved by welding a nickel sheet onto the electrode plate and placing a temperature sensor at the tail end of the nickel sheet. The nickel sheet is exposed to the air, and the structure of the nickel sheet for temperature acquisition is usually relatively long, resulting in a long heat transfer path, which can easily lead to the loss of temperature signal during transmission and affect the acquisition accuracy.

[0005] 2. The electrode itself generates heat as an electrical connection component, and the temperature collected by the nickel sheet welded to it is difficult to accurately reflect the actual temperature of the battery cell, resulting in signal interference;

[0006] 3. The fixation of temperature sensors on the battery cell often relies on the use of adhesive bonding combined with plastic parts for positioning and protection. This method involves complicated processes and a variety of materials, which is not conducive to improving production efficiency and controlling costs. Utility Model Content

[0007] This utility model proposes an integrated cover plate structure and a battery module to solve the above-mentioned problems.

[0008] In a first aspect, embodiments of this utility model disclose an integrated cover plate structure located above the battery cell, comprising:

[0009] The electrical pressure plate has a window at the location corresponding to the cell temperature acquisition position;

[0010] A flexible circuit board, at least partially fixed to an electrical pressure plate, and at least partially extending above the window;

[0011] The temperature sensing element is located on the side of the flexible circuit board away from the battery cell;

[0012] The temperature-sensing reinforcing plate is located on the side of the flexible circuit board away from the battery cell. The middle of the temperature-sensing reinforcing plate has a receiving port for accommodating the temperature acquisition element. The temperature-sensing reinforcing plate is fixed to the electrical pressure plate and the flexible circuit board.

[0013] By adopting the above technical solution, the integrated cover structure provided by this utility model, through opening a window on the electrical pressure plate, allows the temperature acquisition element to extend directly into the window via a flexible circuit board. Compared to the prior art where nickel sheets are welded to the electrode and the temperature sensor is welded onto the nickel sheet, this shortens the heat transfer path, reduces temperature signal loss during transmission, and avoids interference from the electrode's own heating on temperature measurement, thus improving the accuracy and response speed of temperature acquisition. Furthermore, the temperature acquisition element is encased by the receiving opening of the temperature sensing reinforcement plate, replacing the traditional dispensing and plastic part positioning method, reducing the types of materials and assembly processes, lowering production costs, and improving manufacturing feasibility and production efficiency. In addition, the temperature acquisition element is fixed in the Z-direction by the electrical pressure plate, reducing the need for a protective cover and saving costs.

[0014] According to another specific embodiment of the present invention, the two ends of the temperature-sensitive reinforcing plate overlap the plates on opposite sides of the window, and the two ends of the temperature-sensitive reinforcing plate are respectively provided with first through holes.

[0015] The flexible circuit board has a second through hole at the position corresponding to the first through hole;

[0016] The electrical pressure plate has a third through hole corresponding to its body;

[0017] The integrated board structure also includes connectors that pass through the temperature-sensitive reinforcing plate, the flexible circuit board, and the electrical pressure plate in sequence to fix the temperature-sensitive reinforcing plate, the flexible circuit board, and the electrical pressure plate together.

[0018] According to another specific embodiment of this utility model, the connecting member is a rivet.

[0019] According to another specific embodiment of the present invention, one or more of the first through hole, the second through hole and the third through hole are waist-shaped holes.

[0020] According to another specific embodiment of this utility model, the temperature-sensing reinforcing plate is snapped and fixed to the electrical pressure plate.

[0021] According to another specific embodiment of this utility model, the height of the receiving port is not less than the height of the temperature sensing element.

[0022] According to another specific embodiment of the present invention, a reinforcing plate is also included, which is fixed to the side of the flexible circuit board facing the battery cell.

[0023] According to another specific embodiment of the present invention, it further includes:

[0024] A thermally conductive silicone pad is fixed to the side of the flexible circuit board facing the battery cell and corresponds to the position of the temperature sensing element.

[0025] According to another specific embodiment of the present invention, the thickness of the thermally conductive silicone pad is greater than the gap between the battery cell and the electrical pressure plate, and the side of the thermally conductive silicone pad away from the temperature-sensing reinforcing plate abuts against the battery cell.

[0026] Secondly, this utility model provides a battery module including the aforementioned integrated cover structure.

[0027] By adopting the above technical solution, the battery module provided by this utility model has a window on the electrical pressure plate, and the temperature acquisition element extends directly into the window through a flexible circuit board. Compared with the prior art, which welds nickel sheets to the electrode and temperature sensors to the nickel sheets, this shortens the heat transfer path, reduces the loss of temperature signals during transmission, and avoids interference from the electrode's own heating on temperature measurement, thus improving the accuracy and response speed of temperature acquisition. Furthermore, by using the receiving port of the temperature sensing reinforcement plate to enclose the temperature acquisition element, the traditional dispensing and plastic part positioning method is replaced, reducing the types of materials and assembly processes, lowering production costs, and improving manufacturing feasibility and production efficiency. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the first state of the integrated cover plate structure in one embodiment of the present invention;

[0029] Figure 2 This is an exploded view of an integrated cover plate structure (excluding the electrical pressure plate) in one embodiment of the present invention.

[0030] Figure 3 This is a schematic diagram of the second state of the integrated cover plate structure in one embodiment of the present invention;

[0031] Figure 4 This is a three-dimensional structural diagram of the integrated cover plate structure in another embodiment of the present invention;

[0032] Figure 5 This is an exploded view of an integrated cover plate structure (excluding the electrical pressure plate) in another embodiment of the present invention.

[0033] Figure 6 This is a cross-sectional schematic diagram of the integrated cover plate structure in another embodiment of the present invention;

[0034] Figure Labels

[0035] Electrical pressure plate 1; window 11; plate body 12; hook 13; flexible circuit board 2; second through hole 21; temperature acquisition element 3; temperature sensing reinforcement plate 4; receiving port 40; first through hole 41; battery cell 5; connector 6; reinforcing plate 7; thermally conductive silicone pad 8. Detailed Implementation

[0036] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to this embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived based on the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, without conflict, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0037] It should be noted that in this specification, similar reference numerals and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0038] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0039] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0041] Firstly, reference Figure 1 , Figure 2 As shown, an embodiment of this utility model discloses an integrated cover plate structure located in cell 5 ( Figure 6Above the (shown in the image) is an electrical pressure plate 1, a flexible circuit board 2, a temperature acquisition element 3, and a temperature-sensing reinforcement plate 4. The electrical pressure plate 1 has a window 11 at the position corresponding to the temperature acquisition of the battery cell. The flexible circuit board 2 is at least partially fixed to the electrical pressure plate 1 and at least partially extends above the window 11. The temperature acquisition element 3 is located on the side of the flexible circuit board 2 away from the battery cell 5. The temperature-sensing reinforcement plate 4 is located on the side of the flexible circuit board 2 away from the battery cell 5. The temperature-sensing reinforcement plate 4 has a receiving opening 40 in the middle for accommodating the temperature acquisition element 3. The temperature-sensing reinforcement plate 4 is fixed to the electrical pressure plate 1 and the flexible circuit board 2.

[0042] Through the above-described method, the integrated cover plate structure provided by this utility model, by opening a window 11 on the electrical pressure plate 1 at the position corresponding to the temperature acquisition, and having the temperature acquisition element 3 directly extend above the window 11 via the flexible circuit board 2, compared to the prior art's technical solution of welding nickel sheets to electrodes and temperature sensors to nickel sheets, shortens the heat transfer path, reduces temperature signal loss during transmission, and avoids interference from the electrode's own heating on temperature measurement, thus improving the accuracy and response speed of temperature acquisition. Furthermore, by using the receiving opening 40 of the temperature-sensing reinforcing plate 4 to enclose the temperature acquisition element 3, replacing the traditional dispensing and plastic part positioning method, it reduces the types of materials and assembly processes, lowers production costs, and improves manufacturing feasibility and production efficiency. In addition, the temperature acquisition element 3 in the Z direction (e.g., Figure 6 As shown in the figure, it is fixed by an electrical pressure plate 1, which reduces the use of protective covers and saves costs.

[0043] In the above embodiment, the two ends of the temperature-sensing reinforcing plate 4 overlap the plate body 12 on opposite sides of the window 11, and the two ends of the temperature-sensing reinforcing plate 4 are respectively provided with first through holes 41; the flexible circuit board 2 is provided with a second through hole 21 at the position corresponding to the first through hole 41; the plate body 12 of the electrical pressure plate 1 is provided with a third through hole; the integrated board structure also includes a connector 6, which passes through the temperature-sensing reinforcing plate 4, the flexible circuit board 2 and the electrical pressure plate 1 in sequence to fix the temperature-sensing reinforcing plate 4, the flexible circuit board 2 and the electrical pressure plate 1.

[0044] Through the above method, the temperature-sensing reinforcing plate 4, the flexible circuit board 2, and the electrical pressure plate 1 are mechanically fixed together by cooperating with the first through hole, the second through hole, and the third through hole and the connector 6. This connection method provides a stable structure, ensuring the positional accuracy of the temperature acquisition element 3 within the window 11, while also locally pressing the flexible circuit board 2 to prevent displacement or loosening in a vibration environment, thus improving the structural rigidity and reliability of the entire assembly.

[0045] Furthermore, connector 6 is a rivet. Using a rivet for connection achieves permanent fixation, offering advantages such as vibration resistance, high reliability, and prevention of loosening. Simultaneously, the riveting process is highly efficient and cost-effective, resulting in a smooth connection point without the risk of thread stripping. This makes it particularly suitable for automated mass production, further improving product quality consistency and production efficiency.

[0046] In some embodiments, the connection between the temperature-sensing reinforcing plate 4 and the electrical pressure plate 1 is a composite connection. Specifically, the connector 6 includes a rivet and a screw. Preferably, the rivet is used on one side of the window 11 for permanent fixation to ensure the connection strength and vibration resistance of the foundation; on the other side of the window 11, one of the first through hole 41, the second through hole 21, and the third through hole (preferably the third through hole on the electrical pressure plate 1) is a threaded hole and is locked in place by a screw. The screw connection side provides the entire assembly with detachability. During battery module assembly or later maintenance, if it is necessary to inspect, replace, or calibrate the temperature acquisition element 3 or the flexible circuit board 2 below, the operation can be performed simply by loosening the screw and lifting one side of the temperature-sensing reinforcing plate 4, without the need for destructive removal of the rivet, greatly improving the serviceability of the product.

[0047] In the above embodiment, one or more of the first through hole 41, the second through hole 21, and the third through hole are oblong holes. When the battery cell 5 expands and pushes upward, the flexible circuit board 2, which is in direct or indirect contact with the battery cell 5, will have a slight upward displacement tendency. If the through hole connecting it is an oblong hole, then the rivet can move slightly in the long axis direction of the oblong hole, instead of being rigidly stuck. The oblong hole design transforms the shear force acting on the rivet into friction and sliding within the hole. This friction is much smaller than the shear force sufficient to break the rivet. The rivet mainly serves only to connect and tighten, and no longer bears destructive alternating stress, thereby greatly reducing the risk of fatigue fracture of the hot rivet and improving the long-term reliability of the entire structure.

[0048] In some embodiments, a positioning structure (not shown in the figure) is provided within the receiving opening 40 of the temperature-sensing reinforcing plate 4. This positioning structure may be at least two positioning bosses (not shown in the figure) protruding from the inner wall of the receiving opening 40, or an annular positioning ridge (not shown in the figure) surrounding the receiving opening 40. The side of the temperature sensing element 3 contacts the positioning structure, thereby being precisely positioned in the horizontal direction. The positioning structure provides precise installation guidance and positioning for the temperature sensing element 3, avoiding displacement caused by element slippage during dispensing or pressing, ensuring the positional consistency of the temperature sensing element 3 in each product, which is particularly suitable for automated production. Furthermore, thermally conductive gel is applied to the surface of the positioning structure or the corresponding position of the temperature sensing element 3. The thermally conductive gel can fill the air gap between the side of the temperature sensing element 3 and the inner wall of the receiving opening 40, forming an auxiliary heat conduction path from the top and sides to the reinforcing plate. Combined with the main thermally conductive silicone pad 8 at the bottom, a three-dimensional heat dissipation system of "bottom-dominant heat conduction + side-auxiliary heat conduction" is formed, further improving the efficiency and uniformity of thermal management and enhancing the response speed and accuracy of temperature acquisition.

[0049] In the above embodiment, the temperature-sensitive reinforcing plate 4 is bonded and fixed to the flexible circuit board 2.

[0050] In some embodiments, the upper surface of the plate 12 may be lower than the upper surface of the electrical pressure plate 1. This ensures that the height of the temperature-sensing reinforcing plate 4 protruding from the electrical pressure plate 1 is within a specified range, thereby controlling the height in the Z-direction.

[0051] In the above embodiment, the height of the receiving opening 40 is not less than the height of the temperature sensing element 3. This size design ensures that the temperature sensing element 3 can be completely accommodated within the receiving opening 40 of the temperature sensing reinforcing plate 4, so that the temperature sensing reinforcing plate 4 can effectively limit and protect the temperature sensing element 3 in the circumferential direction, avoiding damage to the fragile temperature sensing element 3 due to bumps or squeezing during assembly or use, and improving the protective performance of the structure.

[0052] like Figure 4 , Figure 5 as well as Figure 6As shown, this utility model embodiment also provides an integrated cover structure, which is basically the same as the structure of the above embodiment, except that the temperature-sensing reinforcing plate 4 is snapped and fixed to the electrical pressure plate 1. The temperature-sensing reinforcing plate 4 and the electrical pressure plate 1 are directly fixed by the snap-fit ​​structure, providing a quick assembly solution without the need for additional connecting parts 6. This method further simplifies the assembly steps, improves assembly efficiency, and helps to reduce the number of parts, achieving a lightweight design. In addition, it reduces the use of protective covers and eliminates the need for glue fixation, simplifying the production process and reducing production costs. Specifically, the inner sidewall of the window 11 of the electrical pressure plate 1 is provided with opposing hooks 13, and the temperature-sensing reinforcing plate 4 is snapped onto the hooks 13. In some embodiments, buckles (not shown in the figure) can also be provided on the periphery of the temperature-sensing reinforcing plate 4, and the electrical pressure plate 1 is provided with corresponding slots (not shown in the figure) that cooperate with the buckles. The specific snap-fit ​​form is not limited in this embodiment. In addition, since the flexible circuit board 2 is relatively thin, in Figure 6 Flexible circuit board 2 is not shown in the diagram.

[0053] In some embodiments, the side of the temperature-sensitive reinforcing plate 4 that is not engaged with the electrical pressure plate 1 is limited by the electrical pressure plate 1 to restrict the horizontal movement of the temperature-sensitive reinforcing plate 4.

[0054] exist Figure 1 , Figure 2 , Figure 3 or Figure 4 , Figure 5 , Figure 6 In the illustrated embodiment, the integrated cover structure further includes a reinforcing plate 7, fixed to the side of the flexible circuit board 2 facing the battery cell 5. The reinforcing plate 7 significantly enhances the local stiffness and overall flatness of the flexible circuit board 2 in the area corresponding to the window 11. This prevents the flexible circuit board 2 from sagging or deforming due to its own softness, ensuring the stability of the relative position between the temperature sensing element 3 and the battery cell 5, and also provides a flat and reliable support base for the thermally conductive silicone pad 8 that may be applied subsequently.

[0055] In the above embodiment, a thermally conductive silicone pad 8 is further included, fixed to the side of the flexible circuit board 2 facing the battery cell 5, and corresponding to the position of the temperature acquisition element 3. The thermally conductive silicone pad 8 contacts the battery cell 5 through the window 11, acting as a highly efficient thermal bridge, enabling rapid and low-loss transfer of heat from the surface of the battery cell 5 to the temperature acquisition element 3. This significantly reduces heat loss along the transfer path, overcomes the temperature measurement lag problem caused by air gaps, and thus greatly improves the response speed and accuracy of temperature detection.

[0056] In the above embodiment, the thickness of the thermally conductive silicone pad 8 is greater than the gap between the battery cell 5 and the electrical pressure plate 1, and the side of the thermally conductive silicone pad 8 facing away from the temperature-sensing reinforcing plate 4 abuts against the battery cell 5. This pre-compression design ensures that after the integrated cover plate is installed in place, the thermally conductive silicone pad 8 can be reliably compressed and tightly adhered to the surface of the battery cell 5. This eliminates the contact thermal resistance caused by assembly gaps, establishes a stable and efficient heat conduction path, and guarantees the long-term stability and reliability of temperature acquisition, maintaining good thermal contact even with slight manufacturing tolerances or structural deformations.

[0057] It should be noted that this embodiment does not limit the number of windows 11 opened in the electrical pressure plate 1, and technicians can adjust them according to actual needs.

[0058] Secondly, this utility model provides a battery module including the aforementioned integrated cover structure.

[0059] The integrated cover structure provided by this utility model provides a window 11 on the electrical pressure plate 1, and the temperature acquisition element 3 extends directly into the window 11 through the flexible circuit board 2. Compared with the prior art, which welds nickel sheets to the electrode and temperature sensors to the nickel sheets, this structure shortens the heat transfer path, reduces the loss of temperature signals during transmission, and avoids interference from the electrode's own heating on temperature measurement, thus improving the accuracy and response speed of temperature acquisition. Furthermore, the temperature acquisition element 3 is wrapped by the receiving opening 40 of the temperature-sensing reinforcing plate 4, replacing the traditional dispensing and plastic part positioning method, reducing the types of materials and assembly processes, lowering production costs, and improving manufacturing feasibility and production efficiency.

[0060] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An integrated cover plate structure located above the battery cell, characterized in that, include: The electrical pressure plate has a window at the location corresponding to the cell temperature acquisition position; A flexible circuit board, at least partially fixed to the electrical pressure plate, and at least partially extending above the window; A temperature sensing element is disposed on the side of the flexible circuit board opposite to the battery cell; A temperature-sensing reinforcing plate is located on the side of the flexible circuit board away from the battery cell. The middle part of the temperature-sensing reinforcing plate has a receiving opening for accommodating the temperature acquisition element. The temperature-sensing reinforcing plate is fixed to the electrical pressure plate and the flexible circuit board.

2. The integrated cover plate structure according to claim 1, characterized in that, The two ends of the temperature-sensitive reinforcing plate overlap the plates on opposite sides of the window, and the two ends of the temperature-sensitive reinforcing plate are respectively provided with a first through hole. The flexible circuit board has a second through hole at the position corresponding to the first through hole; The electrical pressure plate has a third through hole corresponding to its plate body; The integrated cover plate structure also includes a connector that passes sequentially through the temperature-sensitive reinforcing plate, the flexible circuit board, and the electrical pressure plate to fix the temperature-sensitive reinforcing plate, the flexible circuit board, and the electrical pressure plate together.

3. The integrated cover plate structure according to claim 2, characterized in that, The connector is a rivet.

4. The integrated cover plate structure according to claim 3, characterized in that, One or more of the first through hole, the second through hole and the third through hole are oblong holes.

5. The integrated cover plate structure according to claim 1, characterized in that, The temperature-sensitive reinforcing plate is snapped and fixed to the electrical pressure plate.

6. The integrated cover plate structure according to claim 1, characterized in that, The height of the receiving port is not less than the height of the temperature sensing element.

7. The integrated cover plate structure according to any one of claims 1 to 6, characterized in that, It also includes a reinforcing plate, which is fixed to the side of the flexible circuit board facing the battery cell.

8. The integrated cover plate structure according to any one of claims 1 to 6, characterized in that, Also includes: A thermally conductive silicone pad is fixed to the side of the flexible circuit board facing the battery cell and corresponds to the position of the temperature acquisition element.

9. The integrated cover plate structure according to claim 8, characterized in that, The thickness of the thermally conductive silicone pad is greater than the gap between the battery cell and the electrical pressure plate, and the side of the thermally conductive silicone pad facing away from the temperature-sensing reinforcing plate abuts against the battery cell.

10. A battery module, characterized in that, The integrated cover structure includes any one of claims 1 to 9.

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