Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1, an embodiment of the present invention provides a measuring jig for a power battery, including a measuring device and a positioning mechanism; wherein:
the measuring device is configured to be capable of moving and adjusting in the three XYZ axes directions with respect to the part to be measured of the power battery 100, and to measure the actual height of the part to be measured of the power battery with respect to a reference value in the Z axis direction; the three axes of XYZ are mutually orthogonal;
the positioning mechanism is configured to calibrate a reference value of the measuring device in the Z-axis direction.
The measuring jig for the power battery comprises a measuring device and a positioning mechanism, wherein the measuring device can adjust the degree of freedom along the directions of three axes of XYZ so as to adjust the relative position between a measuring instrument (such as the measuring mechanism 2 in figure 1) and a component to be measured of the power battery 100, and the convenience of measuring the component to be measured of the power battery can be improved; in addition, the positioning mechanism can calibrate a reference value of the measuring device in the Z-axis direction, and with the reference value as the standard height of the Z-axis direction, and with reference to the reference value, the measuring device can directly measure the actual heights of different positions of the to-be-measured component of the power battery 100 in the Z-axis direction (namely, the heights of the to-be-measured component of the power battery 100 relative to the reference value), so as to directly determine the parallelism of each to-be-measured component of the power battery 100; therefore, the measuring jig for the power battery can measure the actual tolerance conditions of different positions of each component in the power battery, effectively improves the measuring convenience and accuracy, and avoids the scrapping of the power battery caused by the fact that the size tolerance exceeds the drawing allowable range.
Specifically, the to-be-tested component of the power battery may include a cover plate, a housing, a pole and/or the like of the power battery. In actual measurement, the height of a certain point on the component to be measured along the Z-axis direction can be used as the reference value height in the Z-axis direction, and then the height difference of other points on the component to be measured relative to the reference value is measured, so as to determine the parallelism of the component to be measured.
In a specific embodiment, as shown in fig. 1, the measuring apparatus includes a base 10, a degree-of-freedom adjusting mechanism, and a measuring mechanism 2, wherein:
the degree of freedom adjustment mechanism is fixed to the base 10, and the measurement mechanism 2 is attached to the degree of freedom adjustment mechanism;
the degree-of-freedom adjustment mechanism is configured for moving adjustment along three XYZ axes to bring the measurement mechanism 2 to freely move along the three XYZ axes relative to the component to be measured of the power cell 100;
the determination mechanism 2 is configured to measure an actual height of the part under test of the power battery 100 with respect to a reference value in the Z-axis direction.
Specifically, as shown in fig. 1, the measuring unit 2 is used to measure the displacement height of the component to be measured of the power battery 100 along the Z-axis direction, and may be a contact-type displacement measuring unit or a non-contact-type displacement measuring unit.
Illustratively, the measuring mechanism 2 may include one or more of a digital dial indicator, a caliper, a spiral measuring ruler, a laser measuring mechanism and a camera.
In some embodiments, as shown in fig. 1, the degree of freedom adjustment mechanism includes a first transmission assembly, a first guide table 11, a second transmission assembly, a second guide table 12, and a third transmission assembly, wherein:
a first guide table 11 is arranged on the base table 10, and a first transmission assembly is respectively connected with the base table 10 and the first guide table 11 and used for driving the first guide table 11 to move along the X-axis direction relative to the base table 10;
the second guide table 12 is arranged on the first guide table 11, and a second transmission assembly is respectively connected with the first guide table 11 and the second guide table 12 and is used for driving the second guide table 12 to move along the Y-axis direction relative to the first guide table 11;
the measuring mechanism 2 is arranged on the second guide table 12, and a third transmission assembly is respectively connected with the second guide table 12 and the measuring mechanism 2 and is used for driving the measuring mechanism 2 to move along the Z-axis direction relative to the second guide table 12.
In other embodiments, the degree-of-freedom adjustment mechanism may be configured to be only capable of moving and adjusting in the Z-axis direction to allow the measurement mechanism to freely move in the Z-axis direction relative to the power cell. At this time, the measuring device may further include another degree-of-freedom adjusting mechanism, which is also provided on the base, and on which the power battery to be measured is mounted, the degree-of-freedom adjusting mechanism being configured to be capable of moving adjustment in the XY two axis directions to bring the power battery to be measured to freely move in the XY two axis directions with respect to the measuring mechanism. In other words, the adjustment of the relative displacement between the measuring mechanism and the component to be measured of the power battery can be performed not only by moving the measuring mechanism, but also by moving the power battery or a clamp for clamping the power battery, and can be performed by one degree of freedom adjusting mechanism or two or more degree of freedom adjusting mechanisms.
In some embodiments, as shown in fig. 1 and 4, the positioning mechanism may include a measuring tape 3, a first positioning block 30, and a second positioning block 20, wherein:
a measuring tape 3 fixed to the second guide table 12 and extending in the Z-axis direction, the range of the measuring tape 3 extending in the Z-axis direction including a range of movement of the measuring mechanism 2 in the Z-axis direction;
the first positioning block 30 is sleeved on the measuring tape 3 and can slide along the measuring tape 3;
the second positioning block 20 is fixedly connected to the measuring mechanism 2, and the first positioning block 30 is configured to define the position of the second positioning block 20 in the Z-axis direction.
For example, the measuring tape 3 may be provided with a scale.
For example, as shown in fig. 1 and 4, the Z-axis direction is perpendicular to the base 10, i.e. perpendicular to the bearing surface of the base 10; in the Z-axis direction, the second positioning block 20 and the first positioning block 30 are at least partially overlapped, and the second positioning block 20 is located on a side of the first positioning block 30 away from the base 10.
As shown in fig. 1, in the measuring apparatus, a first guide table 11 is provided on a base 10, a second guide table 12 is provided on the first guide table 11, and a measuring mechanism 2 is provided on the second guide table 12; the first guide table 11 is driven to move along the X-axis direction relative to the base table 10, so that the position of the measuring mechanism 2 along the X-axis positive and negative directions can be adjusted, the second guide table 12 is driven to move along the Y-axis direction relative to the first guide table 11, so that the position of the measuring mechanism 2 along the Y-axis positive and negative directions can be adjusted; the measuring mechanism 2 is driven to move along the Z-axis direction relative to the second guide table 12, so that the position of the measuring mechanism 2 along the Z-axis positive and negative directions can be adjusted; namely, the measuring mechanism 2 of the measuring device can be freely adjusted in X, Y, Z three-axis directions relative to the base 10 to change the position of the measuring mechanism 2 relative to the power battery 100 to be measured, so that the measuring mechanism 2 reaches a proper measuring position, and the measuring position of the measuring mechanism 2 along the Z axis can be adjusted due to the fact that the measuring mechanism 2 is used for measuring displacement along the Z axis direction, and therefore adjustment along the Z axis in the positive direction and the negative direction is realized; meanwhile, the second guide table 12 is further provided with a positioning mechanism, which specifically comprises a measuring tape 3 extending along the Z-axis direction, the measuring tape 3 is provided with a first positioning block 30, and as the second positioning block 20 fixedly connected with the measuring mechanism 2 is partially overlapped with the first positioning block 30 along the Z-axis direction, the measuring mechanism 2 can slide along the Z-axis direction to enable the second positioning block 20 to be in contact with the first positioning block 30 and to be limited; therefore, an absolute reference position, namely, a reference value position in the Z-axis direction, can be established in the extending direction of the measuring tape 3 (in the Z-axis direction) through the first positioning block 30, and when the measuring mechanism 2 slides in the Z-axis direction so that the second positioning block 20 contacts with the first positioning block 30, it indicates that the measuring mechanism 2 has reached the reference value position, so that the measuring mechanism 2 can determine a reference measuring position through the contact between the second positioning block 20 and the first positioning block 30 at each measurement, and further directly measure the actual height of the part to be measured of the power battery 100 relative to the reference value in the Z-axis direction, and therefore, the convenience and accuracy of the parallelism measuring operation of the part to be measured of the power battery can be effectively improved.
In a specific embodiment, the positioning mechanism selects or determines a certain position of the power battery as a reference position by means of manual setting or calibration, for example, when the parallelism of the poles of the power battery is measured: in order to visually determine the parallelism and reduce the calculation amount of the pole based on the measured value of the pole, the height of the cover plate is set as a reference position, and then the actual heights of different positions of the pole relative to the reference position, namely the height of the cover plate, are measured by one or more measuring mechanisms such as a digital display dial indicator, a caliper, a spiral measuring ruler, a laser measuring mechanism and a camera, so that the parallelism of the pole can be visually judged. The positioning mechanism can set a reference position or a certain position of the power battery as the reference position through various modes such as a mechanical structure, optical or image calibration and the like.
Specifically, in this embodiment, the power battery 100 to be measured is fixed on the base 10, and the second positioning block 20 is located on the side of the first positioning block 30 away from the base 10 along the Z-axis direction, so that before the measurement mechanism 2 is adjusted to move along the X, Y-axis direction each time, the measurement mechanism 2 may be adjusted to move along the Z-axis first, so that the probe 21 of the measurement mechanism 2 is away from the power battery 100 to be measured, and the probe 21 of the measurement mechanism 2 is prevented from scraping the power battery 100 to be measured when moving along the X, Y-axis subsequently.
In some embodiments, as shown in FIG. 4, the positioning mechanism may further comprise a retaining member, such as a retaining screw; the locking member is disposed on the first positioning block 30 and configured to lock the first positioning block 30 and the measuring tape 3. Namely, the first positioning block 30 can slide up and down on the measuring scale 3 or can be locked by the locking piece.
Specifically, when the position of the first positioning block 30 with respect to the measuring tape 3 corresponds to the reference measuring position of the measuring mechanism 2, the first positioning block 30 can be locked with the measuring tape 3; for example, when the first positioning block 30 contacts the second positioning block 20 and the measuring mechanism 2 is cleared, the first positioning block 30 and the measuring tape 3 can be locked, and during the subsequent measurement, the second positioning block 20 can be adjusted to contact the first positioning block 30, so that the measuring mechanism 2 can be positioned at the reference measurement position.
Taking the measurement of the parallelism of the pole of the square aluminum-shell battery as an example, as shown in fig. 5, the pole of the square aluminum-shell battery generally has A, B, C, D, E, F six measurement points, a section of the pole on the anode/cathode is selected as a starting point to be used as a measurement point a, and subsequent B, C, D, E, F points are sequentially measured; after the reference is selected, the measurement of the parallelism of the poles of the same battery batch can be performed according to the reference. Specifically, as shown in fig. 1 to 4, to survey 2 adoption digital display amesdial of mechanism as an example, utilize the utility model provides a step that measuring tool detects the utmost point post depth of parallelism of square aluminum hull battery can include: firstly, positioning the battery on the base 10, adjusting the measuring device in X, Y, Z three directions to make the measuring needle 21 of the measuring mechanism 2 face the measuring point A of the battery, clearing the measuring mechanism 2, namely, using the height of the measuring point A along the Z axis as the reference value of the Z axis direction, adjusting the first positioning block 30 to reach the position contacted with the second positioning block 20, and locking the first positioning block 30 at the moment, wherein the position of the first positioning block 30 relative to the measuring tape 3 corresponds to the absolute reference measuring position of the measuring mechanism 2 (the zero value position of the measuring mechanism 2); then, adjusting the measuring mechanism 2 to move upwards along the Z axis so that the measuring needle 21 of the measuring mechanism 2 leaves the measuring point of the battery A, and adjusting the measuring mechanism 2 to move along the X, Y axis so that the measuring needle 21 of the measuring mechanism 2 reaches the upper part of the measuring point of the battery B; the measuring mechanism 2 is adjusted to move along the Z axis until the second positioning block 20 contacts the first positioning block 30, and the index of the measuring mechanism 2 is the height difference between the measurement point position B and the measurement point position A; and according to the difference value, the parallelism of the measurement point position B and the measurement point position A can be known. By analogy, each subsequent measurement point position is consistent with the measurement and adjustment action of the measurement point position B, the height difference value between the measurement point position and the measurement point position A can be directly obtained according to the index of the measurement mechanism 2 in each measurement, and the parallelism degree of each subsequent measurement point position and the measurement point position A can be known; to sum up, through the utility model provides a power battery is with measuring tool can find the reference position when measuring at every turn and measure, can be very audio-visual utmost point post depth of parallelism condition that obtains the aluminum hull battery, and is convenient quick to can improve measuring accuracy.
In a specific embodiment, as shown in fig. 1 and fig. 2, the utility model provides an in the measuring tool for power battery, measuring device still includes anchor clamps 4, and this anchor clamps 4 set up on the base station 10 for the power battery 100 that the fixed awaits measuring.
For example, as shown in fig. 1 and fig. 2, the fixture 4 may include two limiting blocks 41, where the two limiting blocks 41 are detachably mounted on the base 10 and configured to limit two ends of the power battery 100 to be tested, so that the power battery 100 to be tested is positioned on the base 10. Specifically, two limiting blocks 41 are detachably mounted on the base 10, and can be detached at any time to change the distance, so as to meet the requirements of the power batteries 100 to be tested with different sizes and specifications.
For example, as shown in fig. 1 and fig. 2, the power battery 100 to be tested is an aluminum-shell battery; at this time, the two limit blocks 41 are oppositely arranged, and a groove for accommodating a part of the edge of the aluminum-case battery is formed on one side of each limit block 41 facing the other limit block 41. For example, the inner wall of the groove can be provided with an elastic piece to adapt to the positioning operation of batteries of different models.
In a specific embodiment, the utility model provides an in the measuring tool for power battery, each drive assembly of degree of freedom adjustment mechanism can adopt unified structure, and is specific:
as shown in fig. 1 and 2, the first transmission assembly includes a first linear guide 51, a first driving member 71 and a first slider 61; the first linear guide rail 51 and the first driving member 71 are arranged on the base 10, and the first slider 61 is arranged on the first guide table 11 and is slidably connected with the first linear guide rail 51; the first linear guide rail 51 extends along the X-axis direction, and the first driving member 71 is in transmission connection with the first guide table 11;
as shown in fig. 1 and 3, the second transmission assembly includes a second linear guide rail 52, a second driving member 72 and a second slider 62; the second linear guide rail 52 and the second driving element 72 are arranged on the first guide table 11, and the second slide block 62 is arranged on the second guide table 12 and is connected with the second linear guide rail 52 in a sliding manner; the second linear guide rail 52 extends along the Y-axis direction, and the second driving element 72 is in transmission connection with the second guide table 12;
as shown in fig. 1 and 4, the third transmission assembly includes a third linear guide 53, a third driving member 73 and a third slider 63; the third linear guide 53 and the third driving member 73 are provided on the second guide table 12, and the third slider 63 is provided on the measuring mechanism 2 and slidably connected to the third linear guide 53; the third linear guide 53 extends along the Z-axis direction, and the third driving member 73 is in transmission connection with the measuring mechanism 2.
Specifically, the process of freely adjusting the measuring mechanism 2 in three directions X, Y, Z when the power battery 100 to be measured is positioned on the base 10 may specifically include: driving the first guide table 11 by the first driving member 71 so that the first slider 61 provided on the first guide table 11 slides along the first linear guide 51, and the first guide table 11 slides along the X axis with respect to the base 10; driving the second guide table 12 by the second driving member 72, so that the second slider 62 disposed on the second guide table 12 slides along the second linear guide rail 52, and further the second guide table 12 slides along the Y-axis with respect to the first guide table 11; the third slider 63 provided on the measurement mechanism 2 is slid along the third linear guide 53 by driving the measurement mechanism 2 to slide along the third linear guide 53 by the third driver 73, and the measurement mechanism 2 is further slid along the Z axis with respect to the second guide table 12.
Illustratively, as shown in fig. 2 to 4, each of the first driving member 71, the second driving member 72 and the third driving member 73 includes a ball screw 701 and a rotating handwheel 702, and further includes a screw fixing member 703, such as a fixing screw. Specifically, the rotating hand wheel 702 is connected with the ball screw 701 and is used for driving the ball screw 701 to rotate; the ball screws 701 of the first driver 71, the second driver 72, and the third driver 73 are fixed to the base 10, the first guide table 11, and the second guide table 12 by screw fixing members 703, respectively.
For example, as shown in fig. 1 to 4, the first guide table 11, the second guide table 12 and the measuring mechanism 2 may be provided with shaft sleeves 8, and the shaft sleeves 8 of the first guide table 11, the second guide table 12 and the measuring mechanism 2 are respectively sleeved on the ball screws 701 of the first driving member 71, the second driving member 72 and the third driving member 73 to realize transmission connection.
For example, as shown in fig. 2 to 4, each of the first linear guide 51, the second linear guide 52, and the third linear guide 53 includes two rails; for each linear guide rail, the ball screw 701 matched with the linear guide rail has the same extension direction with the linear guide rail and is arranged between two tracks of the linear guide rail; for example, the first linear guide 51 and the ball screw 701 (the ball screw 701 of the first driver 71) engaged therewith are provided on the base 10, and the ball screw 701 extends along the X axis and is provided between two rails of the first linear guide 51.
For example, as shown in fig. 1 to 4, the first guide table 11 may be a platform extending in the Y-axis direction so as to carry the second linear guide rail 52 and the second driving member 72, and the second guide table 12 may be a platform extending in the Z-axis direction so as to carry the third linear guide rail 53 and the third driving member 73. The base 10 may be a platform extending in both directions of the X axis and the Y axis, and may be horizontally placed on another table (e.g., a marble table); a first linear guide 51 provided on the base 10 and extending in the X-axis direction, and a jig 4 provided on the base 10 on one side of the first linear guide 51; alternatively, the jig 4 may be placed directly on a table (e.g., a marble table) for carrying the bottom stage.
It should be noted that the specific configuration of the above embodiment is only an example of the measuring device provided by the present invention, and the measuring device provided by the present invention is not limited to the specific configuration of the above embodiment in the actual design.
It will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.