Battery module detection device

Abstract

The invention discloses a battery module detection device, and relates to the technical field of battery detection. The device specifically comprises a bottom frame, a measuring device and a base, wherein the bottom frame comprises a bottom plate for bearing a battery cell; the measuring device is arranged on one side, away from the bottom plate, of the cell; the base bears a base plate and comprises a strain sensor abutting against the lower portion of the base plate. Wherein the measuring device compresses the battery cell towards the bottom plate based on a measured value of the strain sensor. The battery cell is placed on the bottom plate, the battery cell is uniformly bonded with the glue solution of the bottom plate, the base supports the bottom plate, the strain sensor is adopted to obtain the strain force of the bottom plate, the uniform contact of the battery cell and the glue solution of the bottom plate is improved, the base supports the bottom plate, the strain sensor obtains the strain value of the bottom plate in real time, and the bottom plate can be prevented from exceeding the stress range. The deformation of the bottom plate is reduced, the shape of the bottom plate and the disassembly between the frame and the cross beam are ensured, the replacement efficiency of the battery cell and the bottom plate is improved, and meanwhile, the cross beam is suitable for modules of different sizes.

Description

Technical Field

[0001] This invention relates to the field of battery testing technology, and in particular to a battery module testing device. Background Technology

[0002] With the rapid development of new energy vehicles, the reliability and safety requirements of the power battery pack, as a core component, are increasing. Currently, the application of adhesive bonding between the casing and the bottom structure of the cells in power battery packs is becoming more and more widespread, especially in new structures such as cell-to-pack (CTP) or blade batteries. In these structures, adhesives are not only used to fix the cells, but also to bear part of the structural load transfer function.

[0003] In the prior art, when the battery cell is verified or evaluated, it is bonded and fixed to the base plate. During the battery cell measurement process, the base plate is subjected to a large force and is prone to non-plastic deformation due to the pressing method of the battery cell. This can affect the airtightness of the chassis and battery cell in subsequent processes. At the same time, it is impossible to obtain the connection between the adhesive on the base plate and the battery cell, resulting in uneven connection strength between the adhesive on the base plate and the battery cell.

[0004] Therefore, this application aims to solve the problem of uneven bonding strength between the base plate adhesive and the battery cell, which makes the base plate prone to deformation. Summary of the Invention

[0005] The main objective of this invention is to provide a battery module testing device that aims to improve the uniformity of cell adhesive strength while reducing the deformation of the base plate and ensuring the shape of the base plate.

[0006] To achieve the above objectives, the present invention provides a battery module testing device, comprising: The base frame includes a base plate that supports the battery cells; The measuring device is placed on the side of the battery cell away from the base plate; A base that supports the base plate, including a strain sensor abutting against the underside of the base plate; The measuring device presses the battery cell against the base plate based on the measurement values ​​of the strain sensor.

[0007] In the above scheme, the base plate contains adhesive. When the battery cell is placed on the base plate, the base supports the base plate. At the same time, the strain sensor acquires the stress on the lower surface of the base plate to ensure that the stress on the base plate is within the normal bearing range, so as to prevent the base plate from deforming due to stress concentration. The measuring device is preferably located above the battery cell. When the measuring device presses down on the battery cell, it presses the battery cell tightly onto the base plate, so that the battery cell and the adhesive on the base plate are in uniform contact, improving the uniformity of bonding. At the same time, the strain sensor acquires the strain value of the lower surface of the base plate in real time, so that the base plate is continuously kept within a reasonable stress range, so as to prevent deformation due to exceeding the stress range and affecting the sealing performance of subsequent processes.

[0008] Furthermore, the measuring device includes a suction cup and a vertical movement mechanism placed on the suction cup. The vertical movement mechanism can drive the suction cup to press down on the battery cell. The suction cup can move closer to or further away from the battery cell, helping to adhere to the upper surface of the battery cell, facilitating the transfer of the battery cell to the substrate.

[0009] Furthermore, a second monitoring device is connected to the suction cup, and the second monitoring device and the strain sensor respectively acquire the pressure value and strain value on the upper and lower sides of the battery cell.

[0010] Furthermore, the measuring device includes a bracket, the vertical movement mechanism is mounted on the bracket, and clamping blocks are provided at both ends of the bracket. The clamping blocks at both ends can move closer or further apart to clamp the battery cell.

[0011] Furthermore, a lateral movement mechanism is installed on the clamping block, which is connected to the end of the bracket to move the clamping block closer to the battery cell.

[0012] Furthermore, the base frame includes a pair of side frames and a pair of crossbeams, the pair of side frames and the pair of crossbeams forming a hollow area, and the base plate is installed in the hollow area to support the battery cell.

[0013] Furthermore, the base plate is connected to one side wall of the pair of frame frames and the pair of crossbeams.

[0014] Furthermore, a flange is provided on the side of the frame near the base plate.

[0015] Furthermore, the cross-section of the frame is L-shaped.

[0016] Furthermore, the base includes a support block, which is placed at the end of the frame and connected to the frame.

[0017] The above technical solution has the following advantages: This application places the battery cell on a base plate, allowing the adhesive between the battery cell and the base plate to adhere evenly. The base supports the base plate, and a strain sensor is used to obtain the strain force of the base plate. When the measuring device presses down on the battery cell, it can improve the uniform contact between the battery cell and the adhesive on the base plate. At the same time, the base supports the base plate, and the strain sensor obtains the strain value of the base plate in real time, which can prevent the base plate from exceeding the stress range, reduce the deformation of the base plate, and ensure the shape of the base plate.

[0018] In this application, the disassembly of the frame and the crossbeam facilitates the replacement of the base plate, improving the efficiency of replacing the battery cell and the base plate. At the same time, the frame and the crossbeam can be reused repeatedly, and the crossbeam can be replaced with different sizes, which helps to accommodate modules of different sizes and increases the applicability of the test. Attached Figure Description

[0019] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings, wherein: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a first exploded structural diagram of the present invention; Figure 3 This is a second exploded structural diagram of the present invention; Figure 4 This is an exploded structural diagram of the measuring device of the present invention; Figure 5 This is an exploded structural diagram of the base frame of the present invention; Figure 6 This is a structural diagram of the base frame and battery cell of the present invention.

[0020] In the diagram: 1. Base; 11. Support block; 12. Strain sensor; 2. Base frame; 21. Frame; 22. Crossbeam; 23. Base plate; 3. Battery cell; 4. Measuring device; 41. Bracket; 42. Clamping block; 43. Horizontal movement mechanism; 44. First monitoring device; 45. Suction cup; 46. Second monitoring device; 47. Vertical movement mechanism. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the following specific embodiments are only used to explain the invention and do not constitute a limitation thereof.

[0022] like Figures 1-3 As shown, a battery module testing device includes a base frame 2, a measuring device 4, and a base 1. The base frame 2 includes a base plate 23 that supports a battery cell 3. The measuring device 4 is positioned on the side of the battery cell 3 away from the base plate 23. The base 1 supports the base plate 23 and includes a strain sensor 12 resting against the bottom of the base plate 23. The measuring device 4 presses the battery cell 3 against the base plate 23 based on the measured values ​​of the strain sensor 12. The measuring device 4 can move towards the battery cell 3, pressing the battery cell 3 against the base plate 23. Adhesive is present on the base plate 23, allowing the battery cell 3 to adhere and be fixed to the adhesive on the base plate 23 until the adhesive and battery cell 3 are in uniform contact.

[0023] Specifically, the base plate 23 has adhesive. When the battery cell 3 is placed on the base plate 23, the base 1 supports the base plate 23. At the same time, the strain sensor 12 obtains the stress on the lower surface of the base plate 23 to ensure that the stress of the base plate 23 is within the normal bearing range, so as to prevent the base plate 23 from deforming due to stress concentration. The measuring device 4 is preferably located above the battery cell 3. When the measuring device 4 presses down on the battery cell 3, it presses the battery cell 3 tightly onto the base plate 23, so that the battery cell 3 and the adhesive on the base plate 23 are in uniform contact, improving the uniformity of bonding. At the same time, the strain sensor 12 obtains the strain value of the lower surface of the base plate 23 in real time, so that the base plate 23 is continuously kept within a reasonable stress range, so as to prevent deformation due to exceeding the stress range and affecting the sealing performance of subsequent processes.

[0024] like Figure 3 and Figure 4 As shown, the measuring device 4 includes a suction cup 45 and a vertical moving mechanism 47 placed on the suction cup 45. The vertical moving mechanism 47 can drive the suction cup 45 to press down on the battery cell 3. The vertical moving mechanism 47 can drive the suction cup 45 to move up and down, so that the suction cup 45 is close to or away from the battery cell 3. The suction cup 45 can help to adsorb the upper surface of the battery cell 3, making it convenient to transfer the battery cell 3 to the base plate 23. The vertical moving mechanism 47 can be driven by a plate and a screw, so that the screw and the plate rotate, thereby pushing the suction cup 45 to move down. In addition, the vertical moving mechanism 47 can also be driven by a cylinder or an electric cylinder, so that the cylinder or electric cylinder is installed on the plate, and the suction cup 45 is driven down by the cylinder or electric cylinder, so that the suction cup 45 presses the upper surface of the battery cell 3.

[0025] like Figure 3 and Figure 4 As shown, a second monitoring device 46 is connected to the suction cup 45. The second monitoring device 46 and the strain sensor 12 respectively acquire the pressure and strain values ​​on the upper and lower sides of the battery cell 3. The second monitoring device 46 is used to acquire the pressure value of the suction cup 45 on the upper surface of the battery cell 3 in real time, and the strain sensor 12 acquires the strain value of the base plate 23. By using the pressure value of the second monitoring device 46 and the strain value of the strain sensor 12, the battery cell 3 and the base plate 23 are detected in real time to be within a reasonable pressure and stress range. When they are within this pressure and stress range, the adhesion between the base plate 23 and the battery cell 3 is already in a tight state, maintaining the uniformity of the adhesive bonding between the battery cell 3 and the base plate 23. By using the second monitoring device 46 and the strain sensor 12, the pressure and strain values ​​on the upper and lower sides of the battery cell 3 are monitored in real time to keep them within a reasonable range so as not to exceed the preset range.

[0026] like Figure 4As shown, the measuring device 4 includes a bracket 41, and a vertical movement mechanism 47 is mounted on the bracket 41. Clamping blocks 42 are provided at both ends of the bracket 41, and the clamping blocks 42 at both ends can move closer or further apart to clamp the battery cell 3. The vertical movement mechanism 47 is mounted on the bracket 41, such as a plate, a cylinder, or an electric cylinder, so that the screw can drive the suction cup 45 to press down on the upper surface of the battery cell 3. Alternatively, a cylinder or electric cylinder can be used to drive the suction cup 45 to press down on the upper surface of the battery cell 3. Clamping blocks 42 are provided at both ends of the bracket 41, and the clamping blocks 42 can slide along the length of the bracket 41, allowing the slider to move back and forth along the length of the bracket 41 to clamp the battery cell 3 at the suction cup 45. This adapts to several battery cells 3 of different thicknesses and can also press the battery cell 3 tightly, facilitating subsequent pressing of the battery cell 3 onto the base plate 23.

[0027] like Figure 4 As shown in this application, a transverse movement mechanism 43 is installed on the clamping block 42. The transverse movement mechanism 43 is connected to the end of the bracket 41 to drive the clamping block 42 closer to the battery cell 3. The transverse movement mechanism 43, connected to the bracket 41, can drive the clamping block 42 to move along the length of the bracket 41, allowing the clamping block 42 to clamp both sides of the battery cell 3, ensuring the battery cell 3 is in a clamped state. The transverse movement mechanism 43 can be driven by a block and a screw. For example, the block is installed at the end of the bracket 41, and the screw and block rotate, causing the screw to drive the clamping block 42 towards the battery cell 3, thereby pressing and limiting the battery cell 3, facilitating uniform adhesion between the battery cell 3 and the base plate 23. In addition, a first monitoring device 44 can be installed on the block. The first monitoring device 44 is used to obtain the clamping force of the screw, and to detect the magnitude of the clamping force of the battery cell 3 in real time, for personnel to judge in real time.

[0028] like Figure 3 , Figure 5 and Figure 6 As shown, the base frame 2 includes a pair of side frames 21 and a pair of crossbeams 22. The side frames 21 and the crossbeams 22 enclose a hollow area, and the base plate 23 is installed in this hollow area to support the battery cell 3. The side frames 21 and crossbeams 22 combine to form a square base frame 2, giving the base frame 2 a hollow area. The base plate 23 can be installed in the hollow area. Both the side frames 21 and crossbeams 22 are detachable, such as by bolts or screws, or by end-fastening. The base plate 23 can be installed on the side frames 21 and crossbeams 22 using bolts or screws.

[0029] like Figure 5As shown in this application, the base plate 23 is connected to one side wall of a pair of frame 21 and a pair of crossbeams 22. After the frame 21 and crossbeams 22 are assembled, a base frame 2 is formed. The base plate 23 can be installed on the lower surface of the base frame 2 and fixed by bolts. Alternatively, the base plate 23 can be installed in the middle part of the base frame 2. It is only necessary to limit the position of the battery cell 3 by extending the upper surface of the frame 21 and crossbeams 22 beyond the base plate 23.

[0030] like Figure 5 As shown in this application, a flange is provided on the side of the frame 21 near the base plate 23, and the base plate 23 is attached to the flange. Several holes are provided on the flange to facilitate the attachment of the base plate 23 to the flange and to enable bolt tightening installation through the several holes. Optionally, the flange can also be used to place the battery cell 3, so that the base plate is directly installed at the bottom of the frame 21 and the crossbeam 22.

[0031] like Figure 5 and Figure 6 As shown, the cross-section of the frame 21 is L-shaped. The frame 21 is formed by two plates installed perpendicularly to each other to form an L-shaped plate. The edges can also protrude, such as forming the upper flange, to facilitate the placement of the base plate 23. At the same time, the base plate 23 is tightly attached to the frame 21 to prevent the glue from flowing out.

[0032] like Figure 3 and Figure 6 As shown, the base 1 includes a support block 11, which is placed at the end of the frame 21 and connected to the frame 21. The support block 11 is used to install on the ground or work surface. The support block 11 is placed at the end of the frame 21 and can be fixed by bolt tightening. At the same time, the base 1 can also independently install multiple strain sensors 12 to obtain the strain values ​​at different positions of the base plate 23 and prevent deformation of the connection between the base plate 23 and the frame 21.

[0033] In this application, the base frame 2 is formed by a frame 21 and a crossbeam 22. The base plate 23 is installed at the bottom of the frame 21 and the crossbeam 22. The crossbeam 22 can be replaced with different sizes as needed to adapt to different sizes of battery cell 3 modules, thereby improving the applicability. At the same time, the frame 21 and the crossbeam 22 can be reused to reduce the overall cost. The bolt fixing of the frame 21 and the crossbeam 22 improves the disassembly efficiency of the base plate 23.

[0034] The above description is merely a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A battery module testing device, characterized in that, include: The base frame (2) includes a base plate (23) that carries the battery cell (3); The measuring device (4) is placed on the side of the battery cell (3) away from the base plate (23); A base (1) supports the base plate (23) and includes a strain sensor (12) abutting against the bottom of the base plate (23); The measuring device (4) presses the battery cell (3) against the base plate (23) based on the measured value of the strain sensor (12).

2. The battery module testing device as described in claim 1, characterized in that, The measuring device (4) includes a suction cup (45) and a vertical movement mechanism (47) placed on the suction cup (45). The vertical movement mechanism (47) can drive the suction cup (45) to press down the battery cell (3).

3. The battery module testing device as described in claim 2, characterized in that, A second monitoring device (46) is connected to the suction cup (45). The second monitoring device (46) and the strain sensor (12) respectively acquire the pressure value and strain value on the upper and lower sides of the battery cell (3).

4. The battery module testing device as described in claim 2, characterized in that, The measuring device (4) includes a bracket (41), and the vertical movement mechanism (47) is mounted on the bracket (41). Both ends of the bracket (41) are provided with clamps (42), and the clamps (42) at both ends can move closer or further apart to clamp the battery cell (3).

5. The battery module testing device as described in claim 4, characterized in that, A transverse mechanism (43) is installed on the clamp (42), and the transverse mechanism (43) is connected to the end of the bracket (41) to drive the clamp (42) closer to the battery cell (3).

6. The battery module testing device as described in claim 1, characterized in that, The base frame (2) includes a pair of side frames (21) and a pair of crossbeams (22). The pair of side frames (21) and the pair of crossbeams (22) enclose a hollow area. The base plate (23) is installed in the hollow area to support the battery cell (3).

7. The battery module testing device as described in claim 6, characterized in that, The base plate (23) is connected to one side wall of a pair of the frame (21) and a pair of the crossbeams (22).

8. The battery module testing device as described in claim 6, characterized in that, The frame (21) has a flange on the side near the base plate (23).

9. The battery module testing device as described in claim 6, characterized in that, The cross-section of the frame (21) is L-shaped.

10. The battery module testing device according to any one of claims 6 to 9, characterized in that, The base (1) includes a support block (11) which is placed at the end of the frame (21) and connected to the frame (21).

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