Battery size detection device

Abstract

The utility model belongs to battery detection equipment technical field discloses a kind of battery size detection device.The battery size detection device includes standard block, detection table and positioning fixture.The shape of standard block is shaped to square soft package battery setting, and standard block includes block ontology, cover plate and insert piece, cover plate is buckled in block ontology along first direction, and with block ontology detachable connection;The end of insert piece is clamped in block ontology and the end of cover plate along second direction, and the other end extends along second direction to the direction of departing from block ontology.Detection table is used to place standard block;Positioning fixture is fixed to detection table, and the end of standard block along second direction departing from insert piece and the end of standard block along third direction can respectively abut on positioning fixture.First direction is the thickness direction of standard block, second direction is the length direction of standard block, and third direction is the width direction of standard block.The battery size detection device measurement result is accurate, simple structure, high universality and high safety performance.

Description

Technical Field

[0001] This utility model relates to the field of battery testing equipment technology, and in particular to a battery size testing device. Background Technology

[0002] With the widespread use of lithium-ion batteries, the size management of lithium-ion batteries is becoming increasingly stringent. Currently, CCD camera-based inspection devices are commonly used to inspect the size of pouch batteries. To improve the accuracy of the inspection, the CCD system needs to be calibrated before use.

[0003] Existing testing devices use pre-made pouch batteries for two-dimensional measurement as calibration components when calibrating CCD cameras, and the calibration components are manually placed and positioned for CCD camera calibration. However, the pouch battery casing is soft and prone to deformation over time, leading to dimensional inaccuracies in the calibration components, resulting in larger calibration errors for the CCD camera and ultimately causing inaccurate CCD camera measurements. Furthermore, human intervention in the measurement position during the process can cause inaccurate placement, affecting the measurement results.

[0004] Therefore, there is an urgent need to develop a battery size detection device to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a battery size detection device that can detect the size of a pouch battery based on a CCD system. The device provides accurate measurement results, has a simple structure, high versatility, and high safety performance.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A battery size detection device is capable of detecting the size of a pouch cell battery based on a CCD system. The battery size detection device includes:

[0008] A standard block, the shape of which is similar to that of a square soft-pack battery, the standard block includes a block body, a cover plate and an insert plate. The cover plate is fastened to the block body along a first direction and is detachably connected to the block body. One end of the insert plate is clamped at the end of the block body and the cover plate along a second direction, and the other end extends along the second direction in a direction away from the block body.

[0009] A testing station, used to place the standard block;

[0010] A positioning fixture is fixed to the detection table, and one end of the standard block away from the insert along the second direction and one end of the standard block along the third direction can respectively abut against the positioning fixture;

[0011] The first direction is the thickness direction of the standard block, the second direction is the length direction of the standard block, and the third direction is the width direction of the standard block.

[0012] As an optional technical solution for a battery size detection device, the block body has a mounting groove on one side surface along the first direction. The mounting groove is only through one end of the block body along the second direction towards the insert. The cover plate can be embedded in the mounting groove. The insert is located at the bottom of the mounting groove. The side surface of the cover plate along the first direction is flush with the surface of the block body along the first direction.

[0013] As an optional technical solution for battery size detection device, the bottom of the mounting groove is provided with a receiving groove, and the insert can be embedded in the receiving groove.

[0014] As an optional technical solution for the battery size detection device, along the second direction, one side of the cover plate abuts against the side wall of the mounting groove, and the size of the cover plate is smaller than the size of the mounting groove, and the size of the receiving groove is smaller than the size of the mounting groove. As an optional technical solution for the battery size detection device, the receiving groove has mounting holes on both sides along the third direction, and bolts pass through the cover plate and the mounting holes to connect the cover plate and the block body.

[0015] As an optional technical solution for battery size detection device, the standard block further includes a clip shaped like the tab adhesive, the insert is clamped in the clip, the clip is clamped between the block body and the cover plate, and along the third direction, the size of the clip is larger than the size of the insert, and along the second direction, the clip protrudes from the block body, and both ends of the insert protrude from the clip.

[0016] As an optional technical solution for a battery size detection device, the positioning fixture includes a first limiting member and a second limiting member. One end of the block body away from the insert along the second direction can abut against the first limiting member. The first limiting member can be adjusted in position on the detection table along the second direction and the third direction. One end of the block body along the third direction can abut against the second limiting member. The second limiting member can be adjusted in position on the detection table along the first direction and the third direction.

[0017] As an optional technical solution for the battery size detection device, the positioning fixture further includes a first crossbeam and a second crossbeam connected to each other. The first crossbeam is located on one side of the detection platform along the second direction and extends along the third direction. The second crossbeam is located on one side of the detection platform along the third direction and extends along the second direction. The first limiting member is detachably connected to the first crossbeam, and the second limiting member is detachably connected to the second crossbeam.

[0018] As an optional technical solution for the battery size detection device, the positioning fixture further includes a first fixing block and a second fixing block. The first crossbeam is provided with a plurality of first connecting holes, which are evenly spaced along the third direction. A first fastener can pass through the first fixing block and one of the first connecting holes to connect the first fixing block and the first crossbeam. The first limiting member is provided with a first strip hole extending along the second direction. A second fastener can pass through the first strip hole and the first fixing block to connect the first limiting member and the first fixing block. The second crossbeam is provided with a plurality of second connecting holes, which are evenly spaced along the second direction. A third fastener can pass through the second fixing block and one of the second connecting holes to connect the second fixing block and the second crossbeam. The second limiting member is provided with a second strip hole extending along the third direction. A fourth fastener can pass through the second strip hole and the second fixing block to connect the second limiting member and the second fixing block.

[0019] As an optional technical solution for the battery size detection device, the positioning fixture also includes a reinforcing plate, which is located at the connection between the first crossbeam and the second crossbeam and connects the first crossbeam and the second crossbeam. The reinforcing plate can be erected on the detection table.

[0020] The beneficial effects of this utility model are:

[0021] This utility model provides a battery size detection device capable of detecting the size of pouch batteries based on a CCD system. It includes a standard block, a detection stage, and a positioning fixture. The standard block, shaped like a square pouch battery, is placed on the detection stage and serves as a calibration component for the CCD system of the battery size detection device. Compared to using a finished pouch battery as a calibration component, the standard block is relatively harder (compared to the pouch battery's casing), preventing deformation caused by prolonged use and thus avoiding dimensional inaccuracies due to excessive CCD system calibration errors. A cover plate is attached to and detachably connected to the block body. An insert is clamped between the block body and the cover plate, facilitating adjustment of the insert's position and exposed length to accommodate pouch batteries with different tabs, thus improving the versatility of the standard block and consequently the versatility of the battery size detection device.

[0022] Secondly, the positioning fixture can limit the position of the standard block placed on the testing table, avoiding inaccurate positioning caused by human intervention during the measurement process, thus avoiding affecting the measurement results; and the positioning and restriction are only on both sides of the standard block, with a simple structure and simple positioning operation, improving work efficiency.

[0023] Furthermore, there are safety risks during the calibration and testing of pouch lithium batteries, and using positioning fixtures to limit their movement can improve safety during operation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the battery size detection device provided in this embodiment of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the standard block provided in this embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the positioning fixture provided in an embodiment of the present invention.

[0027] In the picture:

[0028] 100, Standard block; 110, Block body; 111, Mounting groove; 112, Receiving groove; 120, Cover plate; 130, Insert piece; 140, Clamping piece; 200, Testing table; 300, Positioning fixture; 310, First limiting member; 311, First strip hole; 320, Second limiting member; 321, Second strip hole; 330, First crossbeam; 340, Second crossbeam; 350, First fixing block; 351, Third strip hole; 360, Second fixing block; 361, Fourth strip hole; 370, Reinforcing plate. Detailed Implementation

[0029] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0030] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0032] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0033] This embodiment provides a battery size detection device that can detect the size of a pouch battery based on a CCD system. The measurement results are accurate, the structure is simple, the applicability is high, and the safety performance is high.

[0034] Specifically, such as Figures 1 to 3 As shown, the battery size detection device includes a standard block 100, a detection table 200, and a positioning fixture 300. The standard block 100 is shaped to resemble a square pouch battery. The standard block 100 includes a block body 110, a cover plate 120, and an insert 130. The cover plate 120 is fastened to the block body 110 along a first direction and is detachably connected to the block body 110, mimicking the main structure of a pouch battery. One end of the insert 130 is clamped between the block body 110 and the end of the cover plate 120 along a second direction, and the other end extends along the second direction away from the block body 110, mimicking the tab of a pouch battery. The detection table 200 is used to place the standard block 100. The positioning fixture 300 is fixed to the detection table 200. The end of the standard block 100 along the second direction away from the insert 130 and the end of the standard block 100 along a third direction can respectively abut against the positioning fixture 300.

[0035] The first direction is the thickness direction of the standard block 100, the second direction is the length direction of the standard block 100, and the third direction is the width direction of the standard block 100.

[0036] The standard block 100, shaped like a square pouch battery, is placed on the testing stage 200 and serves as a calibration component for the CCD system of the battery size testing device. Compared to a finished pouch battery as a calibration component, the standard block 100 is relatively rigid (compared to the pouch battery's casing), which prevents deformation caused by prolonged use and dimensional inaccuracies. This, in turn, avoids large calibration errors in the CCD system that lead to inaccurate CCD detection. The cover plate 120 is fastened to and detachably connected to the block body 110. The insert 130 is clamped between the block body 110 and the cover plate 120, facilitating adjustment of the position and exposed length of the insert 130 on the block body 110 to accommodate pouch batteries with different tabs. This improves the versatility of the standard block 100 and, consequently, the versatility of the battery size testing device.

[0037] Secondly, the positioning fixture 300 can limit the standard block 100 placed on the testing table 200, avoiding inaccurate positioning caused by human intervention in the measurement position during the measurement process, thus avoiding affecting the measurement results; and the positioning and limitation are only on both sides of the standard block 100, with a simple structure and simple positioning operation, improving work efficiency.

[0038] Furthermore, there are safety risks during the calibration and testing of pouch lithium batteries. Using a 300-degree positioning fixture can improve safety during the operation.

[0039] It should be noted that in the subsequent testing of the soft-pack battery, the soft-pack battery replaces the standard block 100 and is placed on the testing table 200 in the same way as the standard block 100, and is positioned by the positioning fixture 300 for testing.

[0040] Optionally, the block body 110 has a mounting groove 111 on one side surface along the first direction. The mounting groove 111 only extends through the end of the block body 110 along the second direction towards the insert 130. The cover plate 120 can be embedded in the mounting groove 111, and the insert 130 is located at the bottom of the mounting groove 111. The side surface of the cover plate 120 along the first direction is flush with the surface of the block body 110 along the first direction. The design of the cover plate 120 being embedded in the mounting groove 111 can improve the connection strength between the cover plate 120 and the block body 110. The mounting groove 111 can also quickly position the cover plate 120, improving installation efficiency and installation accuracy. The mounting groove 111 only extends through the end of the block body 110 along the second direction towards the insert 130, avoiding misalignment between the side edge of the cover plate 120 and the side edge of the block body 110 at the non-insert 130 end, which would lead to assembly errors and improve the dimensional accuracy of the standard block 100.

[0041] Furthermore, the bottom of the mounting groove 111 is provided with a receiving groove 112, into which the insert 130 can be embedded. The receiving groove 112 is used to receive the insert 130, preventing the cover plate 120 from crushing the insert 130, and also allowing the surface of the cover plate 120 to abut against the bottom of the mounting groove 111, thereby improving the connection stability between the cover plate 120 and the block body 110. The receiving groove 112 is located at the bottom of the mounting groove 111. Compared with setting a groove on the cover plate 120 to install the insert 130, this structure makes it easier to install the insert 130, thus facilitating the subsequent snap-fit ​​connection between the cover plate 120 and the block body 110.

[0042] Furthermore, along the second direction, one side of the cover plate 120 abuts against the side wall of the mounting groove 111, increasing the connection strength between the cover plate 120 and the block body 110, and preventing misalignment between the cover plate 120 and the block body 110 during assembly; and the size of the cover plate 120 is smaller than the size of the mounting groove 111, which is a contoured electrode tab in the main structure of the soft-pack battery; the size of the receiving groove 112 is smaller than the size of the mounting groove 111, increasing the contact area between the cover plate 120 and the bottom of the mounting groove 111, and improving the connection strength between the cover plate 120 and the block body 110.

[0043] Optionally, the cover plate 120 and the block body 110 are detachably connected by bolts. In this embodiment, the receiving groove 112 is provided with mounting holes on both sides along the third direction, and bolts pass through the cover plate 120 and the mounting holes to connect the cover plate 120 and the block body 110.

[0044] In this embodiment, there are two inserts 130, and therefore two receiving slots 112. The two receiving slots 112 are spaced apart along a third direction, and there are also mounting holes at the interval between the two receiving slots 112 to improve the connection strength between the cover plate 120 and the block body 110.

[0045] Optionally, the standard block 100 also includes a clip 140 shaped like the tab adhesive to improve its similarity to a pouch battery. Specifically, the insert 130 is clamped in the clip 140, which is clamped between the block body 110 and the cover plate 120. In the third direction, the size of the clip 140 is larger than that of the insert 130. In the second direction, the clip 140 protrudes from the block body 110, and both ends of the insert 130 protrude from the clip 140.

[0046] Optionally, the positioning fixture 300 includes a first limiting member 310 and a second limiting member 320. One end of the block body 110, facing away from the insert 130 along a second direction, can abut against the first limiting member 310. The first limiting member 310 can be adjusted in position on the detection table 200 along both the second and third directions. One end of the block body 110, along a third direction, can abut against the second limiting member 320. The second limiting member 320 can be adjusted in position on the detection table 200 along both the first and third directions. The first limiting member 310 and the second limiting member 320 can be adjusted in position on the detection table 200 to accommodate standard blocks 100 of different sizes, that is, to accommodate pouch batteries of different sizes, further improving the versatility of the battery size detection device.

[0047] Furthermore, the positioning fixture 300 also includes a first crossbeam 330 and a second crossbeam 340 connected to each other. The first crossbeam 330 is located on one side of the testing table 200 along the second direction and extends along the third direction. The second crossbeam 340 is located on one side of the testing table 200 along the third direction and extends along the second direction. The first limiting member 310 is detachably connected to the first crossbeam 330, and the second limiting member 320 is detachably connected to the second crossbeam 340. The first crossbeam 330 and the second crossbeam 340 can be attached to the side of the testing table 200, respectively, and are used to connect and fix the first limiting member 310 and the second limiting member 320, respectively, with high connection strength.

[0048] Furthermore, the positioning fixture 300 also includes a first fixing block 350 and a second fixing block 360. The first crossbeam 330 is provided with a plurality of first connecting holes, which are evenly spaced along a third direction. A first fastener can pass through the first fixing block 350 and one of the first connecting holes to connect the first fixing block 350 and the first crossbeam 330. The first limiting member 310 is provided with a first strip hole 311 extending along a second direction. A second fastener can pass through the first strip hole 311 and the first fixing block 350 to connect the first limiting member 310 and the first fixing block 350. The first fixing block 350 realizes the connection between the first limiting member 310 and the first crossbeam 330. The plurality of first connecting holes realize the adjustment of the first limiting member 310 along a third direction, and the strip hole realizes the adjustment of the first limiting member 310 along a second direction. The second crossbeam 340 is provided with a plurality of second connecting holes, which are evenly spaced along the second direction. A third fastener can pass through the second fixing block 360 and one of the second connecting holes to connect the second fixing block 360 and the second crossbeam 340. The second limiting member 320 is provided with a second strip hole 321 extending along the third direction. A fourth fastener can pass through the second strip hole 321 and the second fixing block 360 to connect the second limiting member 320 and the second fixing block 360. The second fixing block 360 realizes the connection between the second limiting member 320 and the second crossbeam 340. The plurality of second connecting holes realize the adjustment of the second limiting member 320 along the second direction, and the strip hole realizes the adjustment of the first limiting member 310 along the third direction.

[0049] Furthermore, the number of first strip holes 311 can be multiple, for example, two, three or four, etc., with multiple first strip holes 311 spaced apart along a third direction.

[0050] Similarly, the number of second strip holes 321 can be multiple, for example, two, three or four, etc., with multiple second strip holes 321 spaced apart along the second direction.

[0051] It should be noted that, in other embodiments, some of the first connecting holes on the first crossbeam 330 may be used to connect the first fixing block 350, the first crossbeam 330 and the testing table 200, while the other part of the first connecting holes may be used to connect the first crossbeam 330 and the testing table 200; some of the second connecting holes on the second crossbeam 340 may be used to connect the second fixing block 360, the second crossbeam 340 and the testing table 200, while the other part of the second connecting holes may be used to connect the second crossbeam 340 and the testing table 200.

[0052] Furthermore, the first fixing block 350 and the second fixing block 360 are respectively provided with a third strip hole 351 and a fourth strip hole 361. The third strip hole 351 extends along a third direction, and the fourth strip hole 361 extends along a second direction. The third strip hole 351 can be used to correspond to multiple first connecting holes and multiple first fasteners; or it can be used to correspond to one first connecting hole and one first fastener. That is, when adjusting the position of the first fixing block 350, only the first fastener needs to be loosened, and it is not necessary to completely disassemble it. The fourth strip hole 361 can be used to correspond to multiple second connecting holes and multiple third fasteners; or it can be used to correspond to one second connecting hole and one third fastener. That is, when adjusting the position of the second fixing block 360, only the third fastener needs to be loosened, and it is not necessary to completely disassemble it.

[0053] In this embodiment, the first fixing block 350 is slidably engaged with the first crossbeam 330, so that the first fixing block 350 can be slidably adjusted on the first crossbeam 330 after being unfixed. The second fixing block 360 is slidably engaged with the second crossbeam 340, so that the second fixing block 360 can be slidably adjusted on the second crossbeam 340 after being unfixed.

[0054] In this embodiment, the positioning fixture 300 also includes a reinforcing plate 370. The reinforcing plate 370 is located at the connection between the first crossbeam 330 and the second crossbeam 340 and connects the first crossbeam 330 and the second crossbeam 340. The reinforcing plate 370 can be erected on the testing table 200, making the positioning fixture 300 easy to install. In addition, the reinforcing plate 370 can also increase the connection strength between the first crossbeam 330 and the second crossbeam 340.

[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A battery size detection device, capable of detecting the size of a pouch battery based on a CCD system, characterized in that, The battery size detection device includes: A standard block (100) is shaped like a square soft-pack battery. The standard block (100) includes a block body (110), a cover plate (120), and an insert (130). The cover plate (120) is fastened to the block body (110) along a first direction and is detachably connected to the block body (110). One end of the insert (130) is clamped at the end of the block body (110) and the cover plate (120) along a second direction, and the other end extends along the second direction in a direction away from the block body (110). A testing station (200) is used to place the standard block (100); A positioning fixture (300) is fixed to the detection table (200). The end of the standard block (100) facing away from the insert (130) along the second direction and the end of the standard block (100) along the third direction can respectively abut against the positioning fixture (300). The first direction is the thickness direction of the standard block (100), the second direction is the length direction of the standard block (100), and the third direction is the width direction of the standard block (100).

2. The battery size detection device according to claim 1, characterized in that, The block body (110) has a mounting groove (111) on one side surface along the first direction. The mounting groove (111) is only through one end of the block body (110) along the second direction toward the insert (130). The cover plate (120) can be embedded in the mounting groove (111). The insert (130) is located at the bottom of the mounting groove (111). The side surface of the cover plate (120) along the first direction is flush with the surface of the block body (110) along the first direction.

3. The battery size detection device according to claim 2, characterized in that, The bottom of the mounting groove (111) is provided with a receiving groove (112), and the insert (130) can be embedded in the receiving groove (112).

4. The battery size detection device according to claim 3, characterized in that, Along the second direction, one side of the cover plate (120) abuts against the side wall of the mounting groove (111), and the size of the cover plate (120) is smaller than the size of the mounting groove (111), and the size of the receiving groove (112) is smaller than the size of the mounting groove (111).

5. The battery size detection device according to claim 3, characterized in that, The receiving groove (112) has mounting holes on both sides along the third direction, and bolts pass through the cover plate (120) and the mounting holes to connect the cover plate (120) and the block body (110).

6. The battery size detection device according to claim 1, characterized in that, The standard block (100) also includes a clip (140) shaped like an electrode tab, the insert (130) being clamped in the clip (140), the clip (140) being clamped between the block body (110) and the cover plate (120), and along the third direction, the size of the clip (140) is larger than the size of the insert (130), and along the second direction, the clip (140) protrudes from the block body (110), and both ends of the insert (130) protrude from the clip (140).

7. The battery size detection device according to any one of claims 1-6, characterized in that, The positioning fixture (300) includes a first limiting member (310) and a second limiting member (320). One end of the block body (110) facing away from the insert (130) along the second direction can abut against the first limiting member (310). The first limiting member (310) can be adjusted in position on the detection table (200) along the second direction and the third direction. One end of the block body (110) along the third direction can abut against the second limiting member (320). The second limiting member (320) can be adjusted in position on the detection table (200) along the first direction and the third direction.

8. The battery size detection device according to claim 7, characterized in that, The positioning fixture (300) further includes a first crossbeam (330) and a second crossbeam (340) connected to each other. The first crossbeam (330) is located on one side of the detection table (200) along the second direction and extends along the third direction. The second crossbeam (340) is located on one side of the detection table (200) along the third direction and extends along the second direction. The first limiting member (310) is detachably connected to the first crossbeam (330), and the second limiting member (320) is detachably connected to the second crossbeam (340).

9. The battery size detection device according to claim 8, characterized in that, The positioning clamp (300) further includes a first fixing block (350) and a second fixing block (360). The first crossbeam (330) is provided with a plurality of first connecting holes, which are evenly spaced along the third direction. A first fastener can pass through the first fixing block (350) and one of the first connecting holes to connect the first fixing block (350) and the first crossbeam (330). The first limiting member (310) is provided with a first strip hole (311) extending along the second direction. A second fastener can pass through the first strip hole (311) and the first fixing block (350) to connect the first limiting member. (310) and the first fixing block (350); the second crossbeam (340) is provided with a plurality of second connecting holes, the plurality of second connecting holes are evenly spaced along the second direction, the third fastener can pass through the second fixing block (360) and one of the second connecting holes to connect the second fixing block (360) and the second crossbeam (340), the second limiting member (320) is provided with a second strip hole (321) extending along the third direction, the fourth fastener can pass through the second strip hole (321) and the second fixing block (360) to connect the second limiting member (320) and the second fixing block (360).

10. The battery size detection device according to claim 8, characterized in that, The positioning fixture (300) also includes a reinforcing plate (370), which is located at the connection between the first crossbeam (330) and the second crossbeam (340) and connects the first crossbeam (330) and the second crossbeam (340). The reinforcing plate (370) can be erected on the testing table (200).

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