CN209470684U - Power battery thickness measuring device - Google Patents

Abstract

The utility model provides a power battery thickness measuring device, which comprises a frame, a test platform, a pressure applying mechanism and a thickness measuring mechanism arranged on the frame. The test platform is used to carry the power battery, and the rack is provided with a positioning and clamping unit for positioning and clamping the power battery; the pressure applying mechanism includes a power device and a pressure applying unit that can be lifted and lowered above the power battery; on the pressure applying unit A pressure detection device is provided, and the pressure detection device can detect the pressure exerted by the pressure application unit on the power battery; the thickness measurement mechanism includes at least a displacement measurement device provided on the pressure application unit, and each of the displacement measurement devices is configured to measure The thickness of the power battery after being pressed. The power battery thickness measuring device of the utility model can apply a certain pressure to the outside of the power battery to be measured, and can realize the thickness detection of the power battery under a certain external pressure through the thickness measuring mechanism.

Description

Power battery thickness measuring device

technical field

The utility model relates to the technical field of battery detection, in particular to a power battery thickness measurement device.

Background technique

With the vigorous development of the new energy market, power batteries have been widely used in the automotive field, and their safety issues have been paid more and more attention by people. The market and technical levels have put forward more stringent requirements for the safety of power batteries. In the detection of power battery safety, the thickness test of the battery is an important safety and product performance index. By detecting the change in the thickness of the battery, especially when the battery is located in the battery pack and under a certain external pressure, it is important to check the thickness change of the battery and further analyze the shape change of the internal cells of the battery, which is important for the research on improving the safety performance of the battery significance.

The existing battery thickness measurement methods are basically measured by calipers. Because the battery thickness surface is not a plane structure due to various factors, when using calipers to measure, it is necessary to repeatedly measure and compare to measure the maximum thickness of the battery, which is extremely inconvenient. . At the same time, the results of this measurement are affected by the testing methods of equipment and personnel, and the error is large. Some battery thickness detection devices are composed of a base, an inspection block, and a caliper, which can be used for thickness inspection in various battery production processes. However, the utility model has high requirements on the surface condition of the battery. Due to the deformation of the battery thickness, the battery surface is uneven, and the thickness measurement result of the battery will have a large error, and it cannot reflect the difference distribution of the battery surface thickness. At the same time, this solution cannot apply a certain pressure to the external simulation of the battery according to the thickness of the battery to measure the thickness change of the battery under pressure, and it is difficult to provide accurate and effective data for module group production and research and development.

Utility model content

In view of this, the present utility model aims to provide a power battery thickness measuring device, so as to realize the detection of the thickness deformation of the power battery under a certain external pressure.

In order to achieve the above object, the technical scheme of the present utility model is achieved in this way:

A power battery thickness measurement device, comprising:

frame;

a test platform, which is fixedly arranged relative to the frame to carry a power battery, and is provided with a positioning and clamping unit on the frame to form a positioning and clamping unit for positioning and clamping the power battery carried by the test platform;

a pressure applying mechanism, arranged on the frame, the pressure applying mechanism includes a power device, and a pressure applying unit that is drivingly connected with the power output end of the power device and can be lifted and lowered above the power battery; The pressure application unit is provided with a pressure detection device, and the pressure detection device is configured to detect the pressure exerted by the pressure application unit on the power battery;

A thickness measurement mechanism, comprising at least one set of thickness measurement units, each of the thickness measurement units includes an upper displacement measurement device and a lower displacement measurement device respectively placed on the pressure application unit and the test platform, the upper displacement measurement device The measuring device and the lower displacement measuring device are configured to measure the relative displacement of the top and bottom of the power battery, respectively.

Further, the positioning and clamping unit includes a positioning portion fixed on the test platform and located on one side of the power battery, and a clamping portion provided on the other opposite side of the power battery; the clamp The tightening part includes a linear power device, and a clamping block which is drivingly connected with the power output end of the linear power device, and can form with the positioning part to clamp the power battery.

Further, the linear power device is composed of a linear stroke cylinder.

Further, the pressure applying unit includes an upper fixing plate that is fixedly connected with the power output end of the power device, and a pressure applying portion that guides and slides on the upper fixing plate to apply pressure to the power battery. A pressure detection device is provided between the upper fixing plate and the pressing portion.

Further, a fixed plate sliding guide rod is constructed on the upper fixed plate, and a guide hole sleeved on the fixed plate sliding guide rod is constructed on the pressing portion, so as to constitute the pressing portion in the The guide slides on the above fixed plate.

Further, a lifting slide rail parallel to the lifting direction of the pressure applying unit is fixed on the frame, and a slider adapted to the lifting slide rail is fixed on the pressing portion.

Further, the pressing part includes a lower fixing plate, a lifting plate and a pressing plate, and the pressing part is slidably arranged with the lifting slide rail through the lifting plate; the upper part of the lifting plate is slidably connected with the fixing plate. The lower fixing plate of the plate sliding guide rod is fixedly connected, and the lower part is fixedly connected with the pressing plate.

Further, a pressure plate fixing rod is arranged between the lifting plate and the pressing plate, so as to form a space for installing the thickness measuring mechanism between the lifting plate and the pressing plate.

Further, the thickness measurement units are in nine groups, and the thickness measurement units in the nine groups are evenly distributed on the surface of the power battery.

Further, the upper displacement measuring device and the lower displacement measuring device are composed of displacement sensors.

Compared with the prior art, the utility model has the following advantages:

(1) The power battery thickness measuring device according to the present utility model can exert a certain pressure on the outside of the power battery to be measured through the cooperation of the test platform and the pressure applying mechanism, and can realize the determination of the power battery through the thickness measuring mechanism. Thickness detection under external pressure.

(2) By setting the positioning part, it is convenient for the positioning of the power battery to be tested on the test platform, and then the clamping part is set to form the clamping of the power battery, which ensures the fixing of the power battery during the pressure detection process, so as to make the detection more convenient. for safety and accuracy.

(3) The straight-stroke cylinder is used, which is suitable for the performance requirements of the power battery thickness measuring device, and is convenient for equipment and technical implementation.

(4) The up and down sliding of the fixed plate sliding guide rod ensures that the force transmission direction between the upper fixed plate and the lower fixed plate is consistent with the thickness direction of the power battery, which makes the pressure detection of the power battery more accurate.

(5) The lifting slide rail is used to limit the up and down sliding of the pressure applying unit, which prevents the possible offset of the pressure applying unit in the horizontal direction, thereby causing measurement errors.

(6) There is a certain space below the lifting plate to set the pressing plate, which is convenient for the setting of the thickness measuring mechanism on the pressing plate.

(7) Displacement sensors are arranged above and below the power battery, which can realize a comprehensive measurement of the thickness change of the battery under pressure.

(8) The upper and lower displacement sensors are arranged in groups corresponding to the positions, which realizes the measurement of the thickness of the power battery at the specified position.

(9) Multiple sets of displacement sensors are arranged evenly, and the obtained multiple sets of data can construct the three-dimensional deformation of the overall thickness of the power battery under pressure.

Description of drawings

The accompanying drawings that form a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments of the present utility model and their descriptions are used to explain the present utility model. It is only used to represent the relative positional relationship, and does not constitute an improper limitation of the present invention. In the attached image:

Fig. 1 is the three-dimensional schematic diagram of the power battery thickness measuring device according to the embodiment of the utility model located on the frame;

2 is a schematic structural diagram of a power battery thickness measuring device according to an embodiment of the present invention;

Description of reference numbers:

1-Rack, 101-Rack Bottom Plate, 102-Test Platform, 103-Platform Rack, 104-Side Rack Plate, 105-Rear Rack Plate, 106-Top Plate, 107-Clamping Block, 108-Clamping Cylinder , 109-clamping part bracket, 110-lifting slide rail, 1021-positioning part;

2-Pressure application unit, 201-Power cylinder, 202-Cylinder output end, 203-Upper fixing plate, 204-Lower fixing plate, 205-Fixing plate sliding guide rod, 206-Lifting plate, 207-Pressing plate, 208-Pressing plate fixing rod, 209- pressure detection device;

3-displacement measuring device, 301-upper displacement sensor, 302-lower displacement sensor, 4-power battery.

Detailed ways

It should be noted that, in the case of no conflict, the embodiments of the present invention and the features of the embodiments may be combined with each other; the described embodiments are only some, but not all, embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

It should be pointed out that the main idea of the inventive idea of the power battery thickness measurement device of the present invention is that the power battery thickness measurement device includes a frame 1 and a test platform 102 arranged on the frame 1, a pressure application Mechanism and Thickness Measuring Mechanism. The test platform 102 carries the power battery 4, and the rack 1 is provided with a positioning and clamping unit for positioning and clamping the power battery 4 carried by the test platform 102; the pressure applying mechanism includes: A power unit, and a pressure applying unit 2 that is drivingly connected to the power output end of the power unit and can be raised and lowered above the power battery 4; The detection device 209 is configured to detect the pressure exerted by the pressure application unit 2 on the power battery 4; the thickness measurement mechanism includes at least displacement measurement devices 3 provided on the pressure application unit 2, each of the displacement measurement devices 3 is configured to measure the thickness of the power battery 4 after being compressed.

The embodiment shown in the present utility model is based on the above-mentioned general inventive idea, and provides a relatively preferred technical implementation, so as to realize the detection of the deformation of the power battery in its thickness under a certain external pressure.

Example

As shown in FIG. 1 , the power battery thickness measuring device of this embodiment is arranged on the frame 1 . It includes a test platform 102, a pressure applying mechanism and a thickness measuring mechanism.

The test platform 102 is fixed relative to the frame 1 to carry the power battery 4 , and is provided on the frame 1 to form a positioning and clamping position for the power battery 4 carried by the test platform 102 Clamping unit. In this embodiment, as shown in FIG. 2 , the rack includes a rack bottom plate 101 , a side rack plate 104 , a rear rack plate 105 and a top plate 106 , and the 102 is fixedly installed on the bottom plate 101 through a platform frame 103 . Obviously, the test platform 102 should have a size that can completely cover the lower surface of the power battery 4 , and the end surface should be a flat and smooth surface to ensure that the entire lower surface of the power battery 4 bears pressure and avoid causing the surface of the power battery 4 . damage.

As shown in FIG. 2 , in this embodiment, the positioning and clamping unit includes a positioning portion 1021 fixed on the test platform 102 and located on one side of the power battery 4 , and a positioning portion 1021 located on the other opposite side of the power battery 4 . side clamps. The clamping part includes a linear power device, and a clamping block 107 that is drivingly connected with the power output end of the linear power device, and can be configured with the positioning part 1021 to clamp the power battery 4 . Preferably, the linear power device adopts a straight stroke cylinder as the clamping cylinder 108 , and the clamping cylinder 108 is fixedly arranged on the frame 1 through the clamping part bracket 109 .

By setting the positioning portion 1021, the positioning of the power battery 4 to be tested on the test platform 102 is facilitated, and the clamping portion is further provided to form the clamping of the power battery 4, which ensures the fixation of the power battery 4 during the pressure detection process, so that the Detection is safer and more accurate. The use of a straight stroke cylinder is suitable for the performance requirements of the power battery thickness measuring device, and is convenient for equipment and technical implementation.

The pressure applying mechanism in this embodiment is provided on the frame 1, and the pressure applying mechanism includes a power device fixedly mounted on the top plate 106, and a pressure applying unit 2 drivingly connected to the power output end of the power device. , the pressure applying unit 2 can be lifted and lowered above the power battery 4 . A pressure detection device 209 is provided on the pressure application unit 2 , and the pressure detection device 209 is configured to detect the pressure exerted by the pressure application unit 2 on the power battery 4 . Preferably, the power device adopts a straight-stroke power cylinder 201 , and the upper fixing plate 203 is fixedly connected by the cylinder output end 202 of the power cylinder 201 .

Specifically, the pressure applying unit 2 has a lift plate 206, and the lift plate 206 can be slid up and down on the lift rail 110 fixedly installed on the rear rack plate 105 of the rack 1; the pressure The detection device 209 is disposed between the lift plate 206 and the power device, and constitutes a force connection between the lift plate 206 and the power device. The lifting slide rail 110 is used to limit the up and down sliding of the pressure applying unit 2, which prevents the possible displacement of the pressure applying unit 2 in the horizontal direction, thereby causing measurement errors.

The pressure detection device 209 is arranged above the lifting plate 206, clamped by the upper fixing plate 203 and the lower fixing plate 204, and is vertically and evenly arranged at the corners of the upper fixing plate 203 and the lower fixing plate 204 There is a fixed plate sliding guide rod 205 connecting the upper fixed plate 203 and the lower fixed plate 204 . Preferably, the fixed plate sliding guide rods 205 are arranged on the four corners of the upper fixed plate 203 and the lower fixed plate 204, and the upper and lower parts can slide up and down freely. The upper part is fixed on the upper fixing plate 203 and the lower part is fixed on the lower on the fixed plate 204 . Adopting the up and down sliding of the fixed plate sliding guide rod 205 ensures that the force transmission direction between the upper fixed plate 203 and the lower fixed plate 204 is consistent with the thickness direction of the power battery 4, which makes the pressure detection on the power battery 4 easier. precise.

At the four corners of the lift plate 206 , there are pressing plate fixing rods 208 extending downwardly and fixedly. Obviously, the pressure plate 207 should have a size that can completely cover the upper surface of the power battery 4, and the lower end surface should be a flat and smooth surface, so as to ensure that the entire surface of the power battery 4 is pressurized, and to avoid causing damage to the surface of the power battery 4. damage. A pressing plate 207 is arranged under the lifting plate 206 with a certain space, which facilitates the setting of the thickness measuring mechanism on the pressing plate 207 .

In this embodiment, the thickness measurement mechanism includes an upper displacement sensor 301 arranged on the pressing plate 207 and a lower displacement sensor 302 arranged on the test platform 102 . The upper displacement sensor 301 and the lower displacement sensor 302 are arranged in pairs corresponding to the upper and lower positions. Thickness measurement at a set position. Preferably, on the pressing plate 207 directly above the power battery 4 and on the test platform 102 directly below the power battery 4, 9 sets of the upper displacement sensors 301 and the lower displacement sensors are evenly arranged sensor 302 . Such a design realizes a comprehensive measurement of the thickness change of the battery under pressure, and can obtain multiple sets of data, thereby constructing the three-dimensional deformation of the overall thickness of the power battery 4 under pressure.

In order to realize the monitoring, recording and processing of the detection data well, and to facilitate the control of the power device, in this embodiment, the power battery thickness measurement device can be configured with an industrial computer, and the power cylinder 201 and the power cylinder 201 and the power cylinder 201 can be monitored through the industrial computer. The clamping cylinder 108 is controlled, and the industrial computer is electrically connected to the pressure detection device 209 and the thickness measurement mechanism, so as to realize the collection, recording and processing of measurement data.

When the thickness inspection of the power battery 4 is performed, the power battery 4 is first placed on the test platform 102 and positioned by the positioning part 1021 . Furthermore, the operation of the clamping cylinder 108 is controlled to clamp the power battery 4 .

The pressure value detected by the pressure detection device 209 when the power battery 4 has not yet been pressurized is calibrated to 0, and then the pressure applied to the power battery 4 is set, and the air supply pressure to the power cylinder 201 is adjusted in real time by controlling the action of the power cylinder 201 , when the pressure plate 207 presses the upper surface of the power battery 4, the pressure value detected by the pressure detection device 209 is the pressure value of the pressure on the power battery 4. When the pressure value reaches the set value, the power cylinder is stopped. 201 regulation.

9 groups of upper displacement sensors 301 and lower displacement sensors 302 are arranged in the through holes of the pressure plate 207 and the test platform 102. When the pressure reaches the set value, the thickness measurement mechanism is controlled to act, and the corresponding control air path is turned on. The upper displacement sensor The probe of 301 protrudes downward, and the probe of the lower displacement sensor 302 protrudes upward, and touches the surface of the power battery 4, and the thickness values of the power battery 4 at 9 positions are measured.

It should be noted that the standard sample power battery 4 can be used to test first, and the obtained thickness value is calibrated as a standard value, and then the thickness of the power battery 4 to be measured is measured, and the calculation is based on the difference between the obtained power battery 4 and the standard sample. Obtain the thickness and shape data of the power battery 4 to be tested. A displacement sensor can also be added between the pressure plate 207 and the test platform 102. When measuring the thickness, the thickness value between the lower surface of the pressure plate 207 and the upper surface of the test platform 102 measured by the displacement sensor is the power battery 4 to be measured. At the same time, the measured thickness value of the upper displacement sensor 301 and the lower displacement sensor 302 when the surfaces of 207 and 102 are attached to each other is 0. When measuring the thickness of the power battery 4, according to the base point value of the highest thickness, combined with the measured values of the upper displacement sensor 301 and the lower displacement sensor 302, the upper displacement sensor 301 and the lower displacement of the power battery 4 in each group can be calculated. The thickness at the location where the sensor 302 is located, thereby obtaining the overall data of the thickness and shape of the power battery 4 to be measured.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be Included in the protection scope of the present invention.

Claims (10)

1. a power battery thickness measuring device, is characterized in that comprising: rack(1); A test platform (102) is fixedly arranged relative to the rack (1) to carry the power battery (4), and is provided on the rack (1) to constitute a pair of the test platform (102) to carry the power battery (4). The positioning and clamping unit for positioning and clamping of the power battery (4); A pressure applying mechanism is provided on the frame (1), the pressure applying mechanism includes a power device, and a power output end of the power device is drivingly connected so as to be able to rise and fall above the power battery (4). A pressure application unit (2); a pressure detection device (209) is provided on the pressure application unit (2), and the pressure detection device (209) is configured to detect the pressure of the pressure application unit (2) on the power pressure exerted on the battery (4); A thickness measuring mechanism, comprising at least one set of thickness measuring units, each of the thickness measuring units including an upper displacement measuring device (301) and The lower displacement measuring device (302), the upper displacement measuring device (301) and the lower displacement measuring device (302) are configured to measure the relative displacement of the top and bottom of the power battery (4), respectively. 2 . The power battery thickness measurement device according to claim 1 , wherein the positioning and clamping unit comprises a fixed on the test platform ( 102 ) and located on one side of the power battery ( 4 ). 3 . a positioning part (1021), and a clamping part provided on the other opposite side of the power battery (4); the clamping part comprises a linear power device, and is drivingly connected with the power output end of the linear power device to A clamping block (107) for clamping the power battery (4) can be formed together with the positioning part (1021). 3 . The power battery thickness measurement device according to claim 2 , wherein the linear power device is composed of a linear stroke cylinder. 4 . 4. The power battery thickness measurement device according to claim 1, characterized in that: the pressure applying unit (2) comprises an upper fixing plate (203) fixedly connected with the power output end of the power device, and the The upper fixing plate (203) is guided and slid so as to exert pressure on the power battery (4), and the pressure detecting device (209) is provided on the upper fixing plate (203) and the pressing part. between. 5. The power battery thickness measuring device according to claim 4, characterized in that: a fixed plate sliding guide rod (205) is constructed on the upper fixed plate (203), and a sleeve is constructed on the pressing part A guide hole is provided on the sliding guide rod (205) of the fixed plate to constitute the guide sliding of the pressing portion on the upper fixed plate (203). 6. The power battery thickness measuring device according to claim 5, characterized in that: a lifting slide rail (110) parallel to the lifting direction of the pressure applying unit (2) is fixed on the frame (1) , and a sliding block adapted to the lifting slide rail (110) is fixed on the pressing portion. 7. The power battery thickness measurement device according to claim 6, wherein the pressing part comprises a lower fixing plate (204), a lifting plate (206) and a pressing plate (207), and the pressing part passes through the The lifting plate (206) is slidably arranged with the lifting slide rail (110); the upper part of the lifting plate (206) is slidably connected to the lower fixing plate (204) of the sliding guide rod (205) of the fixing plate The lower part is fixedly connected with the pressing plate (207). 8 . The power battery thickness measuring device according to claim 7 , wherein a pressure plate fixing rod ( 208 ) is arranged between the lift plate ( 206 ) and the pressure plate ( 207 ). A space for installing the thickness measuring mechanism is formed between (206) and the pressing plate (207). 9 . The power battery thickness measurement device according to claim 8 , wherein the thickness measurement units are in nine groups, and the thickness measurement units in the nine groups are evenly distributed on the surface of the power battery. 10 . 10 . The power battery thickness measurement device according to claim 9 , wherein the upper displacement measuring device ( 301 ) and the lower displacement measuring device ( 302 ) are composed of displacement sensors. 11 .