CN219454949U - Strapping battery module side flatness checking fixture - Google Patents

Abstract

The utility model relates to the technical field of inspection tools, in particular to a strapping battery module side flatness inspection tool, which comprises a positioning device, wherein the positioning device comprises a reference rod, a positioning structure is arranged on the reference rod and is used for being matched with a matching structure on an end plate of a battery module in a positioning way so as to enable the reference rod to be positioned at one side of the width direction of the battery module, the strapping battery module side flatness inspection tool also comprises a gap detection device matched with the reference rod, and the gap detection device is used for detecting the distance between each single battery of the battery module and the reference rod; the alignment degree of each single battery can be known by utilizing the positioned reference rod fit clearance detection device to directly detect the clearance, the detection of the side flatness of the battery module is realized, and the detection mode is beneficial to reducing errors and improving the reliability of detection results.

Description

Strapping battery module side flatness checking fixture

Technical Field

The utility model relates to the technical field of inspection tools, in particular to a strapping battery module side flatness inspection tool.

Background

The strapping battery module is a module formed by strapping each single battery with components such as an end plate by a steel strapping tape and a plastic strapping tape, as shown in fig. 1 and 2, the arrangement direction of each single battery 200 is the length direction of the battery module, the two ends of the battery module in the length direction are respectively provided with an end plate 100, the end plates 100 are provided with grooves for limiting the strapping tape, the end plates are provided with mounting holes 101, the mounting holes 101 penetrate along the height direction of the battery module, the mounting holes 101 are long holes extending along the length of the battery module, the mounting holes are used for penetrating long bolts to fix the end plates at the bottoms of corresponding battery boxes, the battery modules are fixed, and the mounting holes form a matching structure on the end plates.

For the strapping type battery module, after the single batteries and related components are stacked and extruded, a heating film, a heat dissipation plate and a wire harness plate are adhered to the side face in the width direction of the battery module, if the single batteries are misplaced, the process steps are directly affected, and the module is scrapped when serious, so that the detection of the side flatness of the battery module is vital, and a corresponding side flatness detector is required to be provided for detecting the alignment degree of the side face in the width direction of each single battery of the battery module.

The current detection mode is to use a guiding rule to approach to two side end plates, as shown in fig. 3 and 4, for a normal battery module, the guiding rule 400 leans against the two side end plates 100, if each single battery 200 does not protrude from the end plates 100, a gap is formed between the single battery 200 and the guiding rule 400, the detection is qualified, for an abnormal battery module, as shown in fig. 5, some single batteries 200 protrude from the end plates 100, when the guiding rule 400 leans against the side surface of the battery module, the protruding single batteries 200 interfere with the guiding rule 400, only one end of the guiding rule is attached to one side end plate, and the other end of the guiding rule is tilted, so that the detection of the side flatness is unqualified. However, this detection mode has a larger limitation, as shown in fig. 6, there is also an abnormal module, in which each unit cell 200 is stacked and forms a parallelogram with an internal angle of not 90 degrees, but there is no protruding end plate 100 on both sides, so when the guiding rule 400 is used for detection, the guiding rule still can be attached to the end plate, a gap exists between the cell and the guiding rule, the performance of the detection result is consistent with that of the normal module, the detection result can be mistakenly considered to be a qualified product, and the detection personnel holds the guiding rule to detect, so that a larger error is easy to exist, thereby the detection result is unreliable, and the dislocation degree and the skew degree of each unit cell cannot be known.

Disclosure of Invention

The utility model aims to provide a strapping tape battery module side flatness gauge, which solves the problem that the existing guiding rule is unreliable in detection.

The technical scheme of the strapping battery module side flatness gauge is as follows:

the utility model provides a take battery module side flatness to examine utensil, includes positioner, and positioner includes the benchmark pole, is equipped with location structure on the benchmark pole, and location structure is used for the cooperation with the cooperation structure location on the end plate of battery module in order to make benchmark pole location in one side of battery module width direction, take battery module side flatness to examine utensil still include with the supporting gap detection device of benchmark pole, gap detection device is used for detecting each battery cell of battery module and the interval of benchmark pole.

The beneficial effects are that: the positioning structure of the reference rod is matched with the matching structure on the end plate of the battery module, so that the end plate is utilized to form positioning support for the reference rod, the reference rod can be located on one side of the width direction of the battery module opposite to the single batteries of the battery module, the reference rod is utilized to form a unified detection reference for each single battery, then the matching gap detection device detects the distance between a plurality of single batteries and the reference rod, the alignment degree of each single battery can be known, the detection of the side flatness of the battery module is realized, and the detection mode of directly detecting gaps by utilizing the well-positioned reference rod matching gap detection device is beneficial to reducing errors and improving the reliability of detection results.

Further, both ends of the reference rod are provided with positioning structures.

The beneficial effects are that: the positioning structures at the two ends of the reference rod can be matched with the end plates at the two sides of the battery module respectively, so that the positioning of the reference rod is reliable and the support is stable.

Further, the location structure that the both ends at least one end of benchmark pole set up is adjustable location structure, and adjustable location structure includes the adapter and installs the setting element on the adapter, and the setting element is used for the cooperation of the cooperation structure location on the end plate of battery module, and setting element position is adjustably installed on the adapter and/or adapter position is adjustably installed on the benchmark pole.

The beneficial effects are that: through adjustable location structure, the location structure at the benchmark pole both ends of being convenient for adapts to the relative position of battery module's both sides end plate, adapts to battery module's length fluctuation to can eliminate processing error's influence, the installation of utensil is examined in the convenience.

Further, the adapter comprises a first adapter block and a second adapter block, the first adapter block is arranged on the reference rod through a fastener, the second adapter block is arranged on the first adapter block through a fastener, the positioning piece is arranged on the second adapter block, the adapter block is also matched with a height adjusting gasket and a length adjusting gasket, the height adjusting gasket is used for being arranged between the first adapter block and the reference rod in a cushioning mode to adjust the position of the first adapter block relative to the reference rod in the height direction of the battery module, and the length adjusting gasket is used for being arranged between the second adapter block and the first adapter block in a cushioning mode to adjust the position of the second adapter block relative to the first adapter block in the length direction of the battery module.

The beneficial effects are that: the position of the locating piece relative to the reference rod is adjusted through the adjusting gasket, so that the adjustment quantity is conveniently controlled, and the accuracy of the gauge is guaranteed.

Further, a limiting pin is arranged between the first adapter block and the reference rod and/or between the first adapter block and the second adapter block in a penetrating manner.

The beneficial effects are that: prevent that the adapter from rocking, be favorable to guaranteeing that the location is accurate.

Further, the positioning member is a positioning pin for insertion into a mounting hole on an end plate of the battery module.

The beneficial effects are that: the locating pin is convenient to form locating fit with the mounting hole on the end plate of the battery module, and the gauge is convenient to mount.

Further, the positioning structure comprises positioning pins which are used for being inserted on the end plates of the battery module, the positioning pins of the positioning structure at least at one end of the two ends of the reference rod rotate to the positioning pins, and the rotation stopping positioning pins are used for being inserted in mounting holes on the corresponding end plates of the battery module in a rotation stopping mode.

The beneficial effects are that: the locating pin is restrained from rotating in the mounting hole of the end plate, and accurate location is ensured.

Further, the positioning structure further comprises an adapter seat for installing the positioning pin, the rotation stopping positioning pin is provided with a rotation stopping surface, and the corresponding adapter seat is provided with a rotation stopping matching surface corresponding to the rotation stopping surface so as to limit the rotation of the rotation stopping positioning pin.

The beneficial effects are that: the installation of the rotation stopping locating pin on the adapter seat is limited, so that the error of the installation direction of the rotation stopping locating pin is prevented, and the situation that the rotation stopping locating pin cannot be smoothly inserted into an inherent installation hole on the end plate of the battery module due to the error of the installation direction of the rotation stopping locating pin is avoided.

Further, the positioning pin of the positioning structure at one end of the reference rod is rotated to the positioning pin, and the positioning pin of the positioning structure at the other end is a cylindrical positioning pin.

The beneficial effects are that: one end adopts the rotation stopping locating pin, and the other end adopts the cylinder locating pin, can eliminate the location, can make cylinder locating pin follow battery module length direction slightly in the slot hole of battery module's end plate moreover and remove, adaptable battery module's length fluctuation.

Further, the gap detecting device is a gap gauge, the reference lever has a detecting surface for facing the side surface of the battery module in the width direction of the unit cell, and the upper edge of the detecting surface is provided with a chamfer.

The beneficial effects are that: the method is simple to operate, and a specific clearance value is conveniently obtained through clearance gauge reading, so that the subsequent PACK thermal management design or thermal management optimization is facilitated.

Drawings

FIG. 1 is a schematic diagram of the installation positions of each single cell and an end plate of a strapping battery module in the prior art;

FIG. 2 is a schematic view of the structure of the end plate of FIG. 1 at the mounting holes;

FIG. 3 is a schematic diagram showing a state of the art when a guiding rule is used for detection;

fig. 4 is a schematic diagram showing a state of detecting a normal battery module using a guiding rule according to the prior art;

fig. 5 is a schematic diagram showing a state of detecting one of abnormal battery modules using a guiding rule according to the prior art;

fig. 6 is a schematic diagram illustrating a state of detecting another abnormal battery module using a guiding rule according to the prior art;

FIG. 7 is a schematic view of a positioning device of an embodiment 1 of a strapping battery module side flatness inspection tool of the present utility model when mounted on a battery module;

FIG. 8 is a schematic view of a strapping battery module side flatness gauge of example 1 of the present utility model;

FIG. 9 is a schematic view of the positioning device of FIG. 8;

FIG. 10 is a front view of FIG. 9;

FIG. 11 is a cross-sectional view A-A of FIG. 10;

FIG. 12 is a schematic diagram of the second main adapter block of FIG. 9;

FIG. 13 is a schematic view of the primary alignment pin of FIG. 9;

fig. 14 is a schematic view of the structure of the auxiliary positioning pin in fig. 9.

In the figure: 100. an end plate; 101. a mounting hole; 200. a single battery; 300. packing belt; 400. a guiding rule; 1. a reference lever; 11. chamfering; 2. a first main transfer block; 3. a second main transfer block; 31. a positioning pin fixing hole; 32. a rotation stopping mating surface; 4. a main locating pin; 41. a rotation stopping surface; 42. a positioning section; 5. a secondary locating pin; 6. a limiting pin; 7. a clearance ruler; 8. a sleeve; 9. and (5) fixing a nut.

Detailed Description

Example 1 of a strapping battery module side flatness gauge of the present utility model:

in this embodiment, the positioning structure of the reference rod is matched with the matching structure on the end plate of the battery module, so that the end plate is used for forming a positioning support for the reference rod, the reference rod can be located on one side of the width direction of the battery module opposite to the single batteries of the battery module, the reference rod is used for forming a unified detection reference for each single battery, then the matching clearance ruler is used for detecting the distances between a plurality of single batteries and the reference rod, the alignment degree of each single battery can be known, the detection of the side flatness of the battery module is realized, and the detection mode of directly detecting the clearance by using the located reference rod matching clearance ruler is beneficial to reducing the detection error and improving the reliability of the detection result.

Specifically, as shown in fig. 1, 2, 7, 8, 9, 10, 11, 12, 13, and 14, the strapping battery module side flatness detection tool is used for detecting the side flatness of the strapping battery module, that is, detecting the alignment degree of each single battery 200. The strapping battery module comprises a plurality of single batteries 200 stacked along the length direction of the battery module, two sides of the length direction of the battery module are respectively provided with end plates 100, the two end plates 100 and the single batteries 200 are fixed together through strapping bands 300, mounting holes 101 with long hole structures are formed in the end plates 100, the mounting holes 101 in the end plates 100 are used for being penetrated by corresponding long bolts when the battery module is fixed to the bottom of a corresponding battery box, the mounting holes 101 in the end plates 100 are waist-shaped holes extending along the length direction of the battery module, and the mounting holes 101 form a matching structure in the end plates. The detection of the side flatness of the battery module is to detect the alignment degree of each unit cell 200.

The utility model provides a take battery module side flatness to examine utensil includes positioner and with the supporting clearance detection device of positioner, positioner includes reference lever 1 and the location structure that reference lever 1 both ends set up, location structure includes adapter and locating pin, and the adapter includes first adapter piece, second adapter piece, and the adapter is fixed with reference lever 1, and the locating pin constitutes the setting element, and the locating pin is fixed on the adapter, and the locating pin is used for inserting in the mounting hole 101 on the corresponding end plate 100. The gap detecting means is a gap gauge 7, and the gap gauge 7 is used to measure the distance between the reference lever 1 and the side surface of the unit cell 200 in the width direction of the battery module.

The reference bar 1 is elongated and linearly extends in the longitudinal direction of the battery module, the cross section is approximately rectangular, the reference bar 1 has a detection surface for facing the side surface in the width direction of the unit cell 200, and the upper edge of the detection surface is provided with a chamfer 11. The clearance gauge 7 is adopted for detection, the operation is simple, the specific clearance value is conveniently obtained through the reading of the clearance gauge 7, and the subsequent PACK thermal management design or thermal management optimization is conveniently carried out.

The positioning structures at the two ends of the reference rod 1 are a main positioning structure and an auxiliary positioning structure respectively, and the main positioning structure and the auxiliary positioning structure are adjustable positioning structures. The first transfer block and the second transfer block of the main positioning structure are respectively a first main transfer block 2 and a second main transfer block 3, the first main transfer block 2 and the second main transfer block 3 are L-shaped blocks, the first main transfer block 2 and the second main transfer block 3 are respectively provided with a horizontal extension section and a vertical extension section, the horizontal extension section of the first main transfer block 2 is consistent with the extension direction of the reference rod 1, and the horizontal extension section of the first main transfer block 2 is fixedly connected with the end part of the reference rod 1 through two bolts. The second main transfer block 3 is fixed on one side of the first main transfer block 2 facing the auxiliary positioning structure, the horizontal extension section of the second main transfer block 3 extends perpendicular to the reference rod 1, and the vertical extension section of the second main transfer block 3 is fixedly connected with the vertical extension section of the first main transfer block 2 through two bolts. Limiting pins 6 are respectively arranged between the horizontal extension section of the first main adapter block 2 and the end part of the reference rod 1 and between the vertical extension section of the first main adapter block 2 and the vertical extension section of the second main adapter block 3 in a penetrating manner so as to prevent the adapter blocks from shaking, and the positioning accuracy is guaranteed.

The locating pin of the main locating structure is a main locating pin 4, the main locating pin 4 forms a rotation stopping locating pin, and the main locating pin 4 is fixed on the horizontal extension section of the second main adapter block 3. The main positioning pin 4 includes a plug section for insertion into the mounting hole 101 inherent in the end plate 100 of the battery module, a positioning section 42, a screw section, and a ring land between the plug section and the positioning section 42. The horizontal extension section of the second main adapter block 3 is provided with a locating pin fixing hole 31, a sleeve 8 is arranged in the locating pin fixing hole 31, an inner hole of the sleeve 8 is matched with a locating section 42 of the main locating pin 4, a threaded section of the main locating pin 4 is in threaded connection with a fixing nut 9, a ring table of the main locating pin 4 is blocked at a lower orifice of the locating pin fixing hole 31, so that the main locating pin 4 and the second main adapter block 3 are fixed by screwing the fixing nut 9, and a gasket is arranged between the fixing nut 9 and an upper orifice of the locating pin fixing hole 31. The bolt section of the main locating pin 4 is a waist-shaped column body matched with the waist-shaped mounting hole 101 on the corresponding end plate 100, so that the main locating pin is used for being inserted into the mounting hole 101 on the corresponding end plate 100 of the battery module in a rotation-stopping manner, the locating pin is restrained from rotating in the mounting hole 101 of the end plate 100, and accurate location is ensured.

The annular table of the main locating pin 4 is provided with a milling flat structure to form a rotation stopping surface 41, the lower side surface of the horizontal extension section of the second main adapter block 3 is also provided with a rotation stopping table step, the rotation stopping table step is provided with a rotation stopping matching surface 32 facing the main locating pin 4, and the rotation stopping matching surface 32 corresponds to the rotation stopping surface 41 so as to limit the installation angle of the rotation stopping locating pin when the main locating pin 4 is installed in the locating pin fixing hole 31, and the situation that the rotation stopping locating pin cannot be smoothly inserted into an inherent installation hole 101 on the end plate 100 of the battery module due to incorrect installation direction of the rotation stopping locating pin is avoided.

The locating pin of the auxiliary locating structure is an auxiliary locating pin 5, the auxiliary locating structure is basically the same as the main locating structure and is symmetrically arranged, the difference is that the bolt section of the auxiliary locating pin 5 of the auxiliary locating structure is a cylinder, the bolt section of the locating pin of the main locating structure is a waist-shaped cylinder, correspondingly, a rotation stopping step is not arranged on a second switching block of the auxiliary locating structure, and a rotation stopping surface is not arranged on a ring table of the locating pin of the auxiliary locating structure. By adopting the rotation-stopping locating pin at one end of the reference rod 1 and the cylindrical locating pin at the other end, the over-locating can be eliminated, and the cylindrical locating pin can slightly move along the length direction of the battery module in the long hole of the end plate 100 of the battery module, so that the length fluctuation of the battery module can be adapted. The positioning pins of the auxiliary positioning structure and the main positioning structure extend downwards below the reference rod 1 so as to ensure enough insertion depth. The reference bar 1 is positioned at one side of the width direction of the battery module by the positioning structures at both ends of the reference bar 1 so as to be opposite to the side surface of the unit cell 200, thereby facilitating the detection of the gap between the unit cell 200 and the reference bar 1.

The positioning structure is also matched with a height adjusting gasket and a length adjusting gasket (not shown in the figure), the height adjusting gasket is used for being arranged between the first adapter block and the reference rod 1 in a cushioning mode to adjust the position of the first adapter block relative to the reference rod 1 in the height direction of the battery module, the length adjusting gasket is used for being arranged between the second adapter block and the first adapter block in a cushioning mode to adjust the position of the second adapter block relative to the first adapter block in the length direction of the battery module, the positions of the main positioning structure, the first adapter block of the auxiliary positioning structure and the second adapter block can be adjusted through the gaskets with different thicknesses, the positions of the main positioning pin 4 and the auxiliary positioning pin 5 can be adjusted, the positioning structure at two ends of the reference rod 1 can adapt to the relative positions of two side end plates 100 of the battery module conveniently, the length fluctuation of the battery module is adapted, and the influence of processing errors can be eliminated.

When the battery module is used, the positioning device is positioned and mounted on the end plate 100 of the battery module by utilizing the inherent mounting holes 101 on the end plate 100 of the battery module, the clearance gauge 7 is vertically inserted between the detection surface of the reference rod 1 and the side surface of the single battery 200, the clearance is measured, the measured value is compared with the standard clearance value, and the deviation of the flatness of the side surface of the corresponding position is obtained, for example: measuring the lateral planeness of the two ends and the middle of the battery module in the length direction, and comparing the three values to quickly judge whether the battery module is askew and the skew degree; the requirement of conveniently and rapidly detecting the side flatness of the module can be met, the specific side flatness value can be detected, and the physical size basis of the module is provided for heat management design; the control of the side flatness of the module can be realized, bad materials can be selected in advance, and the scrapping loss of materials such as a subsequent wire harness plate assembly and the like is avoided; the gauge is light and easy to use, can be moved at will, and reduces the requirement of a special detection table top. The gauge can be popularized to the use of strapping tape modules of the same type.

Example 2 of a strapping battery module side flatness gauge in the present utility model:

the present embodiment provides a positioning structure arrangement form different from embodiment 1, and the present embodiment is different from embodiment 1 in that both ends of the reference lever in embodiment 1 are provided with positioning structures. In this embodiment, the positioning structure is provided only at one end of the reference lever.

Example 3 of a strapping battery module side flatness inspection tool in the present utility model:

the present embodiment provides a positioning structure arrangement form different from embodiment 1, and the difference between this embodiment and embodiment 1 is that the positioning structures provided at both ends of the reference lever in embodiment 1 are adjustable positioning structures. In this embodiment, the positioning structure disposed at one of the two ends of the reference rod is an adjustable positioning structure, and the positioning structure disposed at the other end is welded with the reference rod into a whole.

Example 4 of a strapping battery module side flatness gauge in the present utility model:

the present embodiment provides a positioning structure arrangement form different from embodiment 1 in that the adaptor in embodiment 1 includes a first adaptor block and a second adaptor block, and the position of the positioning pin is adjusted by providing shims between the first adaptor block and the reference lever and between the second adaptor block and the first adaptor block. In this embodiment, the first adapter block is slidably disposed on the reference rod, the second adapter block is slidably disposed on the first adapter block, and jackscrews are respectively disposed on the first adapter block and the second adapter block to fix the first adapter block and the second adapter block after the first adapter block and the second adapter block slide to the set positions.

Example 5 of a strapping battery module side flatness gauge in the present utility model:

the present embodiment provides a different setting form of the limiting pin from embodiment 1, and the difference between this embodiment and embodiment 1 is that the limiting pin is respectively installed between the first adapter block and the reference rod, and between the first adapter block and the second adapter block in embodiment 1. In this embodiment, the limiting pin is not arranged any more, and the fixing is performed only by means of the bolt.

Example 6 of a strapping battery module side flatness inspection tool in the present utility model:

the present embodiment provides a positioning pin arrangement form different from embodiment 1 in that the main positioning pin in embodiment 1 is a turning positioning pin and the sub positioning pin is a cylindrical positioning pin. In this embodiment, the positioning pins of the positioning structures at two ends of the reference rod are cylindrical positioning pins.

Example 7 of a strapping battery module side flatness inspection tool in the present utility model:

the present embodiment provides a rotation stopping arrangement form of the second main joint block and the main positioning pin different from embodiment 1, and the difference between this embodiment and embodiment 1 is that the annular table on the main positioning pin in embodiment 1 is provided with a rotation stopping surface, the second main joint block is provided with a rotation stopping step, and the rotation stopping step has a rotation stopping mating surface corresponding to the rotation stopping surface to limit the rotation of the main positioning pin. In this embodiment, the ring table of the main positioning pin is a square ring table, the side surface of the square ring table forms a rotation stopping surface, a rotation stopping groove matched with the square ring table is arranged at the lower orifice of the positioning pin fixing hole of the second main switching block, the groove wall surface of the rotation stopping groove forms a rotation stopping matching surface, and the ring table of the main positioning pin stretches into the rotation stopping groove to form rotation stopping matching.

Example 8 of a strapping battery module side flatness gauge in the present utility model:

the present embodiment provides a positioning structure arrangement form different from embodiment 1, and the positioning structure in embodiment 1 is different from embodiment 1 in that the positioning structure in embodiment 1 includes a first adapter block and a second adapter block, the first adapter block is fixed with a reference rod by a bolt, and the first adapter block and the second adapter block are fixed by a bolt. In this embodiment, the positioning structure includes an L-shaped adaptor, the L-shaped adaptor includes a horizontal section and a vertical section, the vertical section is welded on the reference rod, and the horizontal section is fixed with a positioning pin.

Example 9 of a strapping battery module side flatness inspection tool in the present utility model:

the present embodiment provides a gap detection device different from embodiment 1 in that the gap detection device in embodiment 1 is a tapered gap ruler. In this embodiment, the gap detecting device is a go-no-go gauge.

Embodiment 10 of the strapping battery module side flatness gauge of the present utility model:

the present embodiment provides a reference bar arrangement form different from embodiment 1 in that the reference bar in embodiment 1 has a detection surface for facing the side surface in the cell width direction of the battery module, and the upper edge of the detection surface is provided with a chamfer. In this embodiment, no chamfer is provided on the reference bar, and the cross section of the reference bar is rectangular.

Example 11 of a strapping battery module side flatness inspection tool in the present utility model:

the present embodiment provides a positioning member arrangement form different from that of embodiment 1, and the difference between this embodiment and embodiment 1 is that the positioning member in embodiment 1 is a positioning pin, and the positioning pin forms a positioning fit with an inherent mounting hole on the end plate. In this embodiment, the positioning member is a positioning sleeve, the end plate is provided with a positioning convex column, the positioning convex column is a matching structure which is specially arranged on the end plate and is used for matching with the gauge, and the positioning sleeve is sleeved on the positioning convex column to realize positioning.

It should be noted that the above-mentioned embodiments are merely preferred embodiments of the present utility model, and the present utility model is not limited to the above-mentioned embodiments, but may be modified without inventive effort or equivalent substitution of some of the technical features thereof by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (10)

1. The utility model provides a take battery module side flatness to examine utensil, characterized by, including positioner, positioner includes the benchmark pole, is equipped with location structure on the benchmark pole, location structure be used for with the cooperation structure location cooperation on the end plate of battery module so that the benchmark pole is fixed a position in one side of battery module width direction, take battery module side flatness to examine utensil still includes the clearance detection device with the benchmark pole is supporting, clearance detection device is used for detecting the interval of each battery cell of battery module and benchmark pole.

2. The strapping battery module side flatness inspection tool of claim 1, wherein both ends of the reference bar are provided with positioning structures.

3. The strapping battery module side flatness inspection tool of claim 2, wherein the positioning structure provided at least one of the two ends of the reference bar is an adjustable positioning structure, the adjustable positioning structure comprises an adapter and a positioning member mounted on the adapter, the positioning member is used for positioning and matching with a matching structure on an end plate of the battery module, and the positioning member is adjustably mounted on the adapter and/or the reference bar.

4. The strapping battery module side flatness inspection tool of claim 3, wherein the adapter comprises a first adapter block and a second adapter block, the first adapter block is mounted on the reference bar through a fastener, the second adapter block is mounted on the first adapter block through a fastener, the positioning piece is mounted on the second adapter block, the adapter block is further provided with a height adjusting gasket and a length adjusting gasket in a matching manner, the height adjusting gasket is used for being arranged between the first adapter block and the reference bar in a cushioning manner to adjust the position of the first adapter block relative to the reference bar in the height direction of the battery module, and the length adjusting gasket is used for being arranged between the second adapter block and the first adapter block in a cushioning manner to adjust the position of the second adapter block relative to the first adapter block in the length direction of the battery module.

5. The tool for checking the flatness of a strapping battery module side of claim 4, wherein a limiting pin is provided between the first adapter block and the reference bar and/or between the first adapter block and the second adapter block.

6. The strapping battery module side flatness inspection tool of any of claims 3-5, wherein the positioning member is a positioning pin for insertion into a mounting hole in an end plate of the battery module.

7. The strapping battery module side flatness inspection tool of claim 2, wherein the positioning structure comprises positioning pins for insertion on end plates of the battery module, the positioning pins of the positioning structure of at least one of the two ends of the reference bar being rotationally fixed, the rotationally fixed positioning pins being for rotationally fixed insertion in mounting holes on the corresponding end plates of the battery module.

8. The strapping battery module side flatness inspection tool of claim 7, wherein the positioning structure further comprises an adapter for mounting a positioning pin, the rotation stopping positioning pin is provided with rotation stopping surfaces, and the corresponding adapter is provided with rotation stopping mating surfaces corresponding to the rotation stopping surfaces for limiting rotation of the rotation stopping positioning pin.

9. The tool for checking the flatness of a battery module side of claim 7, wherein the positioning pin of the positioning structure at one end of the reference bar is rotated, and the positioning pin of the positioning structure at the other end is a cylindrical positioning pin.

10. A strapping battery module side flatness inspection tool according to any one of claims 1-5, characterized by gap detection

The device is a clearance gauge, the reference rod is provided with a detection surface for facing the side surface of the battery module in the width direction of the single battery,

the upper edge of the detection surface is provided with a chamfer.