A soft pack battery side voltage detection device and side voltage detection method

Abstract

A side voltage detection device and side voltage detection method for a soft-pack battery, the detection device comprises: a support unit; a battery pressing unit, comprising a lower pressing component and an upper pressing component, the lower pressing component comprises a lower pressing drive mechanism and an upper pressing plate; the upper pressing component comprises a support base, a pressing drive mechanism and a lower pressing plate; a side voltage detection unit, comprising a tab pressing conduction mechanism and a tab protection compatible moving mechanism, the tab pressing conduction mechanism comprises a tab pressing component and a tab conduction mechanism; the tab protection compatible moving mechanism is arranged between the support base and the lower pressing plate; and a control unit, comprising a controller and a plurality of pressure sensors; the side voltage detection method comprises the following steps: adjusting the position according to the size of the incoming material; after the soft-pack battery is loaded in place, the battery pressing unit clamps the soft-pack battery and measures the soft-pack battery. The beneficial effects of the present invention are: it can measure batteries of the same category and different sizes, with a wide range of applications; the whole process is automated and the work efficiency is high.

Description

Technical Field

[0001] The invention relates to a side voltage detection device and a side voltage detection method for a soft-pack battery, belonging to the technical field of side voltage detection of soft-pack lithium batteries. Background Art

[0002] At present, the application of lithium batteries has become more and more extensive. Compared with traditional batteries, they have the advantages of large capacity, high operating voltage, fast charging speed, wide operating temperature range, long cycle life, small size and light weight. Because soft-pack batteries have a greater capacity advantage than cylindrical and square batteries, more and more soft-pack lithium batteries are used as energy storage devices and power devices. Because the middle aluminum layer of the aluminum-plastic film of the soft-pack battery is easily short-circuited with the negative electrode tab during battery packaging, it will cause the middle aluminum layer of the aluminum-plastic film to be corroded. Therefore, in the production and testing process of soft-pack batteries, it is necessary to perform insulation testing on the aluminum-plastic film and the negative electrode tab of the soft-pack battery, that is, edge voltage detection.

[0003] The utility model patent (patent number: CN207248935U) involves a side voltage test device for a soft-pack lithium battery, which is mainly used to test the side voltage of a soft-pack battery with tabs on the same side. The test probe and the soft-pack lithium battery are electrically connected through conductive cotton, and then the side voltage is detected. In this scheme, there is a secondary electrical connection between the test probe and the soft-pack lithium battery, which will lead to inaccurate test results. In addition, in this test, no pressure is applied to the soft-pack battery, so it is impossible to judge whether its insulation performance is good or bad. Summary of the invention

[0004] In order to solve this problem, the present invention proposes a side voltage detection device for a soft-pack battery. The side voltage testing device has the advantages of simple structure, fully automatic operation, good compatibility and strong adaptability. In addition, during the side voltage test process, the external and internal structures of the soft-pack battery will not be damaged.

[0005] The soft pack battery side voltage detection device of the present invention is characterized by comprising:

[0006] The support unit has a mounting platform on the top, and the mounting platform is provided with a first hollow mounting hole and a second hollow mounting hole for mounting the battery pressing unit and the tab pressing unit;

[0007] The battery pressing unit comprises a lower pressing component and an upper pressing component, wherein the lower pressing component comprises a lower pressing driving mechanism and an upper pressing plate, wherein the lower pressing driving mechanism is slidably embedded in the first hollow mounting hole of the supporting unit, and the force-applying end of the lower pressing driving mechanism is kept extending from the hollow mounting hole and falling below the mounting platform, so as to apply pressure to the soft-pack battery; the upper pressing plate is installed at the force-applying end of the lower pressing driving mechanism, so as to contact the upper surface of the body of the soft-pack battery to apply pressure thereto; the upper pressing component comprises a supporting base, a pressing driving mechanism and a lower pressing plate, wherein the supporting base is arranged below the lower pressing component, so as to support the pressing driving mechanism; the pressing driving mechanism is arranged on the supporting base, and the pressing end of the pressing driving mechanism is slidably fitted with the lower pressing plate, and the lower pressing plate is kept parallel to the upper pressing plate, and a clamping area for accommodating lithium batteries is left between the two;

[0008] A side voltage detection unit, comprising a tab pressing and conducting mechanism and a tab protection compatible moving mechanism, wherein the tab pressing and conducting mechanism comprises a tab pressing assembly and a tab conducting mechanism, wherein the tab pressing assembly is embedded in the second hollow mounting hole, and is used to press down and press the tab of the soft-pack battery; the tab conducting mechanism is installed at the pressing end of the pressing drive mechanism, and is directly opposite to the tab pressing assembly, and is used to achieve conduction between the tab of the soft-pack battery and the tab pressing assembly to perform a side voltage test on the tab; the tab protection compatible moving mechanism is arranged between the support base and the lower pressing plate, and comprises a horizontal moving part and a vertical lifting part, wherein the horizontal moving part is slidably arranged on the support base of the upper pressing assembly, and is used to adjust the horizontal position of the vertical lifting part to be compatible with different types of soft-pack batteries; the vertical lifting part is installed on the horizontal moving part, and the lifting end of the vertical lifting part passes through the through hole of the lower pressing plate, and is used to drive the lower pressing plate to move horizontally while supporting the tab of the soft-pack battery;

[0009] And a control unit, including a controller and multiple pressure sensors, the voltage test connection end of the controller is electrically connected to the test connection port of the tab clamping assembly, and is used to perform a side voltage test on the soft-pack battery; the pressure sensors are respectively arranged at the battery clamping unit and the tab protection compatible mobile mechanism, and are used to feed back the pressure value to the controller; the signal output end of the controller is respectively electrically connected to the battery clamping unit and the action control end of the tab protection compatible mobile mechanism, and is used to control the operation of the battery clamping unit and the tab protection compatible mobile mechanism.

[0010] Furthermore, the support unit includes a support plate serving as a mounting platform and a plurality of support columns, the support plate being mounted on the edge voltage detection area of ​​the production line through the support columns, and a first hollow mounting hole and a second hollow mounting hole being provided on the support plate, and the first hollow mounting hole is adjacent to the second hollow mounting hole.

[0011] Furthermore, the pressing drive mechanism includes a pressing cylinder component, a first sliding component and a fixed component. The pressing cylinder component is a power component, which provides power for lifting and lowering the pressing assembly. It is slidably connected to the fixed component through the first sliding component, so that the pressing cylinder component is lifted and lowered axially along the first sliding component; the pressing end of the pressing cylinder component is fixedly connected to the upper pressure plate, which is used to apply pressure to the surface of the soft-pack battery; the first sliding component has at least two groups, which are symmetrically arranged on both sides of the cylinder component, and its sliding part is connected to the cylinder component, and its guide is connected to the fixed component, which is used to provide guidance for the lifting and lowering movement of the pressing assembly; the fixed component corresponds to the first sliding component one by one, and the fixed component is embedded in the first hollow mounting hole of the support plate, and the fixed component is symmetrically arranged on the outside of the first sliding component to support the pressing assembly.

[0012] Further, the pressing cylinder component includes a pressing cylinder, a floating joint, a cushion block and a first fixed plate, the pressing cylinder is connected to the cushion block through the floating joint, the cushion block is connected to the first fixed plate, the first fixed plate is connected to the upper pressing plate and keeps the upper pressing plate horizontal;

[0013] The guide portion of the first sliding component is a first sliding rail arranged vertically, and the sliding portion includes a first sliding block and a sliding plate. The first sliding component is connected to the fixed component through the first sliding rail; the sliding plate of the first sliding component is connected to the first fixed plate of the cylinder component to achieve the connection between the first sliding component and the downward pressing cylinder component; the first sliding rail and the sliding plate are connected and matched through the first sliding block, so that the downward pressing cylinder component slides axially along the first sliding rail under the drive of the sliding plate to adjust the longitudinal position of the cylinder component;

[0014] The fixing components include a fixing plate and reinforcing ribs; the fixing plates are symmetrically arranged at the first hollow mounting holes of the supporting plate, and are fixedly connected to the lower surface of the supporting plate through the reinforcing ribs; the fixing plates are located on the outer side of the first slide rail and are connected to the corresponding first slide rail, so that the two sets of first sliding components are symmetrically arranged at the first hollow mounting holes of the supporting plate; the reinforcing ribs have four groups, two groups form a pair, and are symmetrically arranged on the front and rear sides of the fixing plate.

[0015] Further, the support base is used to support the upper pressure assembly, including a support plate and a support vertical plate, the support plate is used to install the support cylinder component, and the support vertical plates have two groups, which are symmetrically arranged on the lower surface of the support plate and are used to directly fix the production line;

[0016] The clamping cylinder component is a power component, which is installed and connected to the support plate and used to provide power for the lifting movement of the upper pressure assembly, including a clamping cylinder and a second fixed plate; the clamping cylinder is installed and fixed on the support plate, and the joint end of the clamping cylinder is connected to the second fixed plate; the second sliding component has two groups, which provide guidance for the lifting movement of the upper pressure assembly, and are symmetrically arranged on both sides of the clamping cylinder component and connected to the support base and the lower pressure plate. The lower pressure plate is connected to the second fixed plate and is used to support the soft-pack battery.

[0017] Further, the tab pressing assembly includes a probe, a probe pad, a thin cylinder and a cylinder mounting plate, wherein the probe is a functional component used to detect the side voltage when in contact with the negative tab; the probe is connected to the thin cylinder through the probe pad; the thin cylinder is mounted and connected to the support plate of the bracket assembly through the cylinder mounting plate;

[0018] The tab conduction mechanism includes a compatible conduction mechanism and a tab pad. The tab pad is arranged on one side of the second fixed plate, adjacent to the compatible conduction mechanism, and is used to support and protect the tab of the soft-pack battery; the compatible conduction mechanism is arranged on the second fixed plate, adjacent to the lower pressure plate, and opposite to the tab clamping assembly, and is used to be compatible with soft-pack batteries of different models.

[0019] Furthermore, the tab protection compatible mobile mechanism includes a supporting slide rail base, a lifting cylinder component, a third sliding component and a tab support block, the supporting slide rail base includes a flat plate and a movable slide rail, the flat plate is used to install the supporting lifting cylinder component; the movable slide rail has two groups, which are installed on the supporting flat plate and connected to the lower surface of the flat plate through fixings; the lifting cylinder component is a power component, which is installed and connected to the flat plate and is used to provide power for the lifting movement of the tab protection compatible mobile mechanism; the tab support block is arranged on the third fixed plate, and passes through the lower pressure plate to support and protect the tabs of the soft-pack battery.

[0020] Furthermore, the lifting cylinder component includes a lifting cylinder and a third fixed plate; the lifting cylinder is installed and fixed on a flat plate, and the joint end of the lifting cylinder is connected to the third fixed plate; the third sliding component has two groups, which provide guidance for the lifting and lowering movement of the tab protection compatible moving mechanism, are symmetrically arranged on both sides of the lifting cylinder component, and are connected to the supporting slide rail base and the third fixed plate.

[0021] Furthermore, there are two pressure sensors, namely a first pressure sensor, a second pressure sensor and a third pressure sensor, wherein the first pressure sensor is arranged between the clamping cylinder of the upper pressure component and the second fixed plate, that is, the joint end of the clamping cylinder is connected to the pressure sensor, and the pressure sensor is connected to the second fixed plate, and the signal output end of the first pressure sensor is electrically connected to the signal input end of the controller, for controlling the pressure value between the lower pressure component and the upper pressure component; the second pressure sensor is arranged between the lifting cylinder and the third fixed plate of the lifting cylinder component, the joint end of the lifting cylinder is connected to the pressure sensor, and the second pressure sensor is connected to the third fixed plate, and the signal output end of the second pressure sensor is electrically connected to the signal input end of the controller, for controlling the pressure value between the tab protection compatible moving mechanism and the soft-pack battery.

[0022] A method for measuring edge voltage using a soft-pack battery edge voltage detection device according to the present invention is characterized in that it comprises the following steps:

[0023] 1) The soft pack battery side voltage detection device is fixed to the production line through the support base of the bracket assembly and the upper pressure assembly;

[0024] 2) After different types of soft-pack batteries are received, the compatible conduction mechanism of the soft-pack battery side voltage detection device and the compatible moving mechanism of the tab protection are adjusted according to the size of the incoming soft-pack batteries to meet the actual soft-pack battery model size requirements;

[0025] 3) After the soft-pack battery is loaded in place, the cylinder component of the lower pressure assembly starts to descend, and under the guidance of the first sliding component, the upper pressure plate slowly descends. When the lower pressure plate contacts the upper surface of the soft-pack battery, the soft-pack battery is pressed; at this time, the tab clamping assembly presses down and contacts the tab on one side of the soft-pack battery, and at the same time, the upper pressure assembly and the tab protection compatible moving mechanism move upward to protect the tab on the other side of the soft-pack battery;

[0026] 4) Through the cylinder air pressure control and the actual feedback of the pressure sensor, when the pressure sensor feedback value reaches the pressure required for the soft pack battery test side voltage, the side voltage is detected by the probe, and the lithium battery is judged whether it meets the insulation requirements according to the side voltage result;

[0027] 5) After the edge voltage detection is completed, the lower pressure component rises and the edge voltage detection component descends. The production line removes NG and transports it to the next process based on whether the edge voltage of the soft-pack battery is qualified.

[0028] The beneficial effects of the present invention are: 1. The side voltage detection device for a soft-pack battery can replace different upper and lower pressure plate tooling, and has a compatible moving mechanism, which can adapt to soft-pack batteries of different specifications; 2. The pressure applied to the soft-pack battery can be controlled, and the force is evenly applied, which can adapt to the pressure environment required by different soft-pack batteries, and at the same time, it can prevent the internal structure of the soft-pack battery from being deformed and secondary damaged due to uneven force; 3. The entire side voltage detection device can achieve fully automated control to ensure the stability of the test environment and test data; 4. The side voltage test probe has a large contact area and the test value is accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural diagram of the soft pack battery side voltage detection device of the present invention;

[0030] Figure 2 is a front view of the side voltage detection device;

[0031] Figure 3 It is a left view of the side voltage detection device;

[0032] Figure 4 It is a structural diagram of the pressing assembly and the tab pressing assembly of the device;

[0033] Figure 5 is a structural diagram of the pressing assembly of the device;

[0034] Figure 6 is a front view of the downward pressing assembly of the device;

[0035] Figure 7 It is a structural diagram of the tab pressing assembly of the device;

[0036] Figure 8 is a structural diagram of the upper pressure assembly of the device;

[0037] Fig. 9 is a front view of the upper pressing assembly of the device;

[0038] Fig.10 is a left side view of the upper pressing assembly of the device;

[0039] Fig.11 is a structural diagram of the extreme ear protection compatible moving mechanism of the device;

[0040] Fig.12 is a front view of the device's ear protection compatible moving mechanism. DETAILED DESCRIPTION

[0041] The present invention is further described below in conjunction with the accompanying drawings.

[0042] Refer to the attached figure:

[0043] Embodiment 1 A soft-pack battery side voltage detection device according to the present invention comprises:

[0044] The support unit 1 has a mounting platform on the top, and a first hollow mounting hole and a second hollow mounting hole on the mounting platform for mounting a battery pressing unit and a tab pressing unit;

[0045] The battery pressing unit comprises a lower pressing component 2 and an upper pressing component 4, wherein the lower pressing component comprises a lower pressing driving mechanism and an upper pressing plate 24, wherein the lower pressing driving mechanism is slidably embedded in the first hollow mounting hole of the support unit, and the force-applying end of the lower pressing driving mechanism is kept extending from the hollow mounting hole and falling below the mounting platform, so as to apply pressure to the soft-pack battery; the upper pressing plate 24 is installed at the force-applying end of the lower pressing driving mechanism, so as to contact the upper surface of the body of the soft-pack battery to apply pressure thereto; the upper pressing component 4 comprises a supporting base 41, a pressing driving mechanism and a lower pressing plate 44, wherein the supporting base 41 is arranged below the lower pressing component 2, so as to support the pressing driving mechanism; the pressing driving mechanism is arranged on the supporting base 41, and the pressing end of the pressing driving mechanism is slidably fitted with the lower pressing plate, and the lower pressing plate 44 is kept parallel and facing the upper pressing plate 24, and a clamping area for accommodating lithium batteries is left between the two;

[0046] A side voltage detection unit, including a tab pressing and conducting mechanism and a tab protection compatible moving mechanism 5, wherein the tab pressing and conducting mechanism includes a tab pressing assembly 3 and a tab conducting mechanism, wherein the tab pressing assembly 3 is embedded in the second hollow mounting hole, and is used to press down and press the tab of the soft-pack battery; the tab conducting mechanism is installed at the pressing end of the pressing drive mechanism, and is directly opposite to the tab pressing assembly 3, and is used to achieve conduction between the tab of the soft-pack battery and the tab pressing assembly 3 to perform a side voltage test on the tab; the tab protection compatible moving mechanism 5 is arranged between the supporting base 41 and the lower pressing plate 44, and includes a horizontal moving part and a vertical lifting part, wherein the horizontal moving part is slidably arranged on the supporting base of the upper pressing assembly, and is used to adjust the horizontal position of the vertical lifting part to be compatible with different types of soft-pack batteries; the vertical lifting part is installed on the horizontal moving part, and the lifting end of the vertical lifting part passes through the through hole of the lower pressing plate, and is used to drive the lower pressing plate to move horizontally while supporting the tab of the soft-pack battery;

[0047] And a control unit, including a controller and multiple pressure sensors, the voltage test connection end of the controller is electrically connected to the test connection port of the tab clamping assembly, and is used to perform a side voltage test on the soft-pack battery; the pressure sensors are respectively arranged at the battery clamping unit and the tab protection compatible mobile mechanism, and are used to feed back the pressure value to the controller; the signal output end of the controller is respectively electrically connected to the battery clamping unit and the action control end of the tab protection compatible mobile mechanism, and is used to control the operation of the battery clamping unit and the tab protection compatible mobile mechanism.

[0048] The support unit 1 includes a support plate 11 as a mounting platform and a plurality of support columns 12. The support plate is mounted on the edge voltage detection area of ​​the production line through the support columns, and a first hollow mounting hole and a second hollow mounting hole are provided on the support plate, and the first hollow mounting hole is adjacent to the second hollow mounting hole.

[0049] The pressing drive mechanism includes a pressing cylinder component 21, a first sliding component 22 and a fixed component 23. The pressing cylinder component 21 is a power component, which provides power for the pressing assembly to lift and lower. The pressing cylinder component is slidably connected to the fixed component 23 through the first sliding component 22, so that the pressing cylinder component is axially lifted and lowered along the vertically arranged first sliding component 22; the pressing end of the pressing cylinder component is fixedly connected to the upper pressure plate 24, which is used to apply pressure to the surface of the soft-pack battery; the first sliding component 22 has at least two groups, which are symmetrically arranged on both sides of the cylinder component, and its sliding part is connected to the pressing cylinder component 21, and its guide is connected to the fixed component 23, which is used to provide guidance for the lifting and lowering movement of the pressing assembly 2; the fixed component 23 corresponds to the first sliding component 22 one by one, and the fixed component 23 is embedded in the first hollow mounting hole of the support plate 11, and the fixed component 23 is symmetrically arranged on the outside of the first sliding component 22, which is used to support the pressing assembly.

[0050] The pressing cylinder component 21 includes a pressing cylinder 211, a floating joint 212, a cushion block 213 and a first fixed plate 214, wherein the pressing cylinder is connected to the cushion block via a floating joint, the cushion block is connected to the first fixed plate, and the first fixed plate is connected to the upper pressing plate to keep the upper pressing plate level;

[0051] The guide portion of the first sliding component 22 is a vertically arranged first slide rail 221, and the sliding portion includes a first slider 222 and a slide plate 223. The first sliding component 22 is connected to the fixed component 23 through the first slide rail 221; the slide plate 223 of the first sliding component 22 is connected to the first fixed plate of the downward-pressing cylinder component 21 to achieve the connection between the first sliding component 22 and the downward-pressing cylinder component 21; the first slide rail 221 and the slide plate 223 are connected and matched through the first slider 222, so that the downward-pressing cylinder component 21 slides axially along the first slide rail 221 driven by the slide plate 223 to adjust the longitudinal position of the cylinder component;

[0052] The fixing component 23 includes a fixing plate 231 and a reinforcing rib 232; the fixing plates 231 are symmetrically arranged at the first hollow mounting holes of the support plate 11, and are fixedly connected to the lower surface of the support plate 11 through the reinforcing rib 232. The fixing plates 231 are located on the outer side of the first slide rail 221 and are connected to the corresponding first slide rail 221, so that the two sets of first sliding components 22 are symmetrically arranged at the first hollow mounting holes of the support plate 11; the reinforcing rib 232 has four groups, two groups form a pair, and are symmetrically arranged on the front and back sides of the fixing plate 231.

[0053] The support base 41 is used to support the upper pressure assembly, including a support plate 411 and a support vertical plate 412. The support plate 411 is used to install the support cylinder component. The support vertical plates 412 have two groups, which are symmetrically arranged on the lower surface of the support plate and are used to directly fix the production line.

[0054] The clamping cylinder component 42 is a power component, which is installed and connected to the support plate 411, and is used to provide power for the lifting movement of the upper pressure assembly, including a clamping cylinder 421 and a second fixed plate 423; the clamping cylinder 421 is installed and fixed on the support plate 411, and the joint end of the clamping cylinder 421 is connected to the second fixed plate 423; the second sliding component 43 has two groups, which provide guidance for the lifting movement of the upper pressure assembly 4, and are symmetrically arranged on both sides of the clamping cylinder component 42, and are connected to the support base 41 and the lower pressure plate 44. The lower pressure plate 44 is connected to the second fixed plate 423, and is used to support the soft-pack battery.

[0055] The tab pressing assembly 3 includes a probe 31, a probe pad 32, a thin cylinder 33 and a cylinder mounting plate 34. The probe 31 is a functional component used to detect the side voltage when in contact with the negative tab; the probe 31 is connected to the thin cylinder 33 through the probe pad 32; the thin cylinder 33 is mounted on the support plate 11 of the bracket assembly 1 through the cylinder mounting plate 34;

[0056] The tab conduction mechanism includes a compatible conduction mechanism 46 and a tab pad 45. The tab pad 45 is arranged on one side of the second fixed plate 423, adjacent to the compatible conduction mechanism 46, and is used to support and protect the tab of the soft-pack battery; the compatible conduction mechanism 46 is arranged on the second fixed plate 423, adjacent to the lower pressure plate 44, and opposite to the tab clamping assembly 3, and is used to be compatible with soft-pack batteries of different models.

[0057] The horizontal moving part of the tab protection compatible mobile mechanism 5 is a supporting slide rail base 51, and the vertical lifting part includes a lifting cylinder component 52, a third sliding component 53 and a tab support block 54. The supporting slide rail base includes a flat plate 511 and a movable slide rail 512, and the flat plate is used to install the supporting lifting cylinder component; the movable slide rail 512 has two groups, which are installed on the supporting flat plate 511 and connected to the lower surface of the flat plate 511 through a fixing member; the lifting cylinder component 52 is a power component, which is installed and connected to the flat plate 511 and is used to provide power for the lifting movement of the tab protection compatible mobile mechanism 5; the tab support block 54 is arranged on the third fixed plate 53, and passes through the lower pressure plate 44 to support and protect the tabs of the soft-pack battery.

[0058] The lifting cylinder component 52 includes a lifting cylinder 521 and a third fixing plate 523; the lifting cylinder 521 is installed and fixed on the flat plate 511, and the joint end of the lifting cylinder 521 is connected to the third fixing plate 523;

[0059] There are two groups of the third sliding components 53, which provide guidance for the lifting and lowering movement of the tab protection compatible moving mechanism, are symmetrically arranged on both sides of the lifting cylinder component 52, and are connected to the supporting slide rail base 51 and the third fixed plate.

[0060] Embodiment 2 A side voltage detection device for a soft-pack battery described in the present invention comprises a bracket assembly 1, a battery clamping unit, a side voltage detection unit and a control unit, wherein the bracket assembly 1 is used to support the battery clamping unit; the battery clamping unit comprises a lower pressing assembly 2 and an upper pressing assembly 4, the side voltage detection unit comprises a tab clamping conduction mechanism and a tab protection compatible movement mechanism, the tab clamping conduction mechanism comprises a tab clamping assembly 3 and a tab conduction mechanism; the lower pressing assembly 2 is connected to the bracket assembly 1 and is opposite to the upper pressing assembly 4, and is used to press down and stabilize the soft-pack battery body; the tab clamping assembly 3 is connected to the bracket assembly 1 and is adjacent to the lower pressing assembly 2, and is used to press down and clamp the tab of the soft-pack battery; the upper pressing assembly 4 is arranged under the lower pressing assembly 2 The side of the lithium battery is connected to the upper pressure component 4 and is opposite to the lower pressure component 2, and is used to detect the side voltage of the lithium battery; the tab protection compatible mobile mechanism 5 is adjacent to the upper pressure component 4, and is used to protect the tabs of the soft-pack battery and be compatible with different types of soft-pack batteries; the control unit includes a controller and multiple pressure sensors, and the voltage test connection end of the controller is electrically connected to the test connection port of the tab pressing component, which is used to perform side voltage test on the soft-pack battery; the pressure sensors are respectively arranged at the battery pressing unit and the tab protection compatible mobile mechanism, and are used to feed back the pressure value to the controller; the signal output end of the controller is respectively electrically connected to the action control end of the battery pressing unit and the tab protection compatible mobile mechanism, and is used to control the operation of the battery pressing unit and the tab protection compatible mobile mechanism.

[0061] The bracket assembly 1 includes a support plate 11 and four support columns 12, which are used to support the lower pressure assembly 2 and the tab pressing assembly 3; a first hollow mounting hole and a second hollow mounting hole are provided on the support plate, and the first hollow mounting hole is adjacent to the second hollow mounting hole; the lower pressure assembly 2 and the tab pressing assembly 3 are connected to the support plate 11, opposite to the upper pressure assembly 3; there are four support columns 12, which are installed at the four corners of the support plate 11 to support the support plate 11, and the support columns 12 can be directly fixed on the production line.

[0062] The pressing assembly 2 includes a pressing drive mechanism and an upper pressing plate 24, and the pressing drive mechanism includes a pressing cylinder component 21, a first sliding component 22, and a fixing component 23 and an upper pressing plate 24. The pressing cylinder component 21 is a power component, which provides the power for the pressing assembly 2 to rise and fall, and is connected to the first sliding component 22 and the upper pressing plate 24; the cylinder component 21 includes a cylinder 211, a floating joint 212, a cushion block 213 and a first fixing plate 214; the cylinder 211 is connected to the cushion block 213 through the floating joint 212, the cushion block 213 is connected to the first fixing plate 214, and the first fixing plate 214 is connected to the upper pressing plate 24. The first sliding component 22 has two groups, which provide guidance for the lifting and lowering movement of the pressing assembly 2, and is symmetrically arranged on both sides of the cylinder component 21, and is connected to the cylinder component 21 and the fixing component 23. The fixing component 23 is used to support the pressing assembly 2, is connected to the first sliding component 22, and is symmetrically arranged on the outside of the first sliding component 22; the upper pressing plate 24 is connected to the first fixing plate 214 of the cylinder component 21, and is used to contact the upper surface of the body of the soft-pack battery.

[0063] The upper pressing plate 24 is an insulating plastic plate, such as a polytetrafluoroethylene plate, and has a smooth surface without burrs.

[0064] The upper pressure assembly 4 includes a support base 41, a clamping cylinder component 42, a second sliding component 43, a lower pressure plate 44, a lug pad 45 and a compatible conduction mechanism 46. The support base 41 is used to support the upper pressure assembly 4; the support base 41 includes a support plate 411 and a support vertical plate 412, the support plate 411 is used to install the support cylinder component 42, and the support vertical plate 412 has two groups, which are symmetrically arranged on the lower surface of the support plate 411 and can be directly fixed on the production line. The clamping cylinder component 42 is a power component, which is installed and connected to the support plate 411 and is used to provide power for the lifting movement of the upper pressure assembly 4. The clamping cylinder component 42 includes a clamping cylinder 421 and a second fixed plate 423; the clamping cylinder 421 is installed and fixed on the support plate 411, and the joint end of the clamping cylinder 421 is connected to the second fixed plate 423. The second sliding components 43 have two groups, provide guidance for the lifting movement of the upper pressing assembly 4, are symmetrically arranged on both sides of the pressing cylinder component 42, and are connected to the support base 41 and the lower pressing plate 44. The lower pressing plate 44 is connected to the second fixing plate 423 to support the soft-pack battery.

[0065] The lower pressing plate 44 is an insulating plastic plate, such as a polytetrafluoroethylene plate, and has a smooth surface without burrs.

[0066] The tab pressing assembly 3 includes a probe 31, a probe pad 32, a thin cylinder 33 and a cylinder mounting plate 34. The probe 31 is a functional component, whose test connection port is electrically connected to the voltage test connection end of the controller through a wire, and whose contact test end faces the tab conduction mechanism, and is used to detect the side voltage when contacting the negative tab of the soft-pack battery; the probe 31 is connected to the thin cylinder 33 through the probe pad 32. The thin cylinder 33 is installed and connected to the support plate 11 of the bracket assembly 1 through the cylinder mounting plate 34.

[0067] The tab conduction mechanism includes a compatible conduction mechanism 46 and a tab pad 45. The tab pad 45 is arranged on one side of the second fixing plate 423, adjacent to the compatible conduction mechanism 46, and is used to support and protect the tab of the soft-pack battery. The compatible conduction mechanism 46 is arranged on the second fixing plate 423, adjacent to the lower pressing plate 44, and opposite to the tab pressing assembly 3; the compatible conduction mechanism 46 is used to be compatible with different models of soft-pack batteries.

[0068] The tab protection compatible mobile mechanism 5 includes a support rail base 51, a lifting cylinder component 52, a third sliding component 53 and a tab support block 54. The support rail base 51 is used for the tab protection compatible mobile mechanism 5; the support rail base 51 includes a flat plate 511 and a movable rail 512, the flat plate 511 is used to install the support lifting cylinder component 52, the movable rail 512 has two groups, which are installed on the support flat plate 411 and connected to the lower surface of the flat plate 411 through a fixing member. The lifting cylinder component 52 is a power component, which is installed and connected to the flat plate 511 and is used to provide power for the lifting movement of the tab protection compatible mobile mechanism 5. The lifting cylinder component 52 includes a lifting cylinder 521 and a third fixed plate 523; the lifting cylinder 521 is installed and fixed on the flat plate 511, the joint end of the lifting cylinder 521 is connected to the pressure sensor 522, and the pressure sensor 522 is connected to the third fixed plate 523. The third sliding component 53 has two groups, provides guidance for the lifting and lowering movement of the tab protection compatible moving mechanism 5, is symmetrically arranged on both sides of the lifting cylinder component 52, and is connected to the support slide rail base 51 and the third fixed plate 523. The tab support block 54 is arranged on the third fixed plate 523, and passes through the lower pressing plate 44 to support and protect the tab of the soft-pack battery.

[0069] The tab protection compatible mobile mechanism 5 also includes a guiding device, which includes a connecting rod 55 and a guide block 56. The guide block 56 is arranged on the production line. A guide groove is provided on the guide block 56. The guide groove is axially arranged along the movable slide rail 512 to guide the connecting rod 55 to slide; one end of the connecting rod is slidably matched with the guide groove of the guide block, and the other end of the connecting rod is connected to the support slide rail base 51.

[0070] There are two pressure sensors, namely a first pressure sensor 422 and a second pressure sensor 522, wherein the first pressure sensor is arranged between the clamping cylinder of the upper pressure component and the second fixed plate, that is, the joint end of the clamping cylinder is connected to the pressure sensor, and the pressure sensor is connected to the second fixed plate, and the signal output end of the first pressure sensor is electrically connected to the signal input end of the controller, for controlling the pressure value between the lower pressure component and the upper pressure component; the second pressure sensor is arranged between the lifting cylinder and the third fixed plate of the lifting cylinder component, the joint end of the lifting cylinder is connected to the pressure sensor, and the second pressure sensor is connected to the third fixed plate, and the signal output end of the second pressure sensor is electrically connected to the signal input end of the controller, for controlling the pressure value between the tab protection compatible moving mechanism and the soft-pack battery.

[0071] The control unit also includes a photoelectric sensor, which is arranged on the lower pressure plate, and a signal output end of the photoelectric sensor is electrically connected or signal-connected to a signal input end of the controller for detecting the presence of the soft-pack battery.

[0072] Embodiment 3 A method for detecting the edge voltage of a soft-pack battery using the soft-pack battery edge voltage detection device described in Embodiment 2 comprises the following steps:

[0073] 1) The soft pack battery side voltage detection device is fixed to the production line through the support assembly 1 and the support base 41 of the upper pressure assembly 4;

[0074] 2) After different types of soft-pack batteries are received, the compatible conduction mechanism 46 of the soft-pack battery side voltage detection device and the tab protection compatible moving mechanism 5 are adjusted according to the size of the incoming soft-pack batteries to meet the actual soft-pack battery model size requirements;

[0075] 3) After the photoelectric sensor detects that the soft-pack battery is in place, the cylinder component 21 of the lower pressing assembly 2 starts to descend, and under the guidance of the first sliding component 22, the upper pressing plate 24 slowly descends. When the lower pressing plate 24 contacts the upper surface of the soft-pack battery, the soft-pack battery is pressed; at this time, the tab pressing assembly 3 presses down and contacts the tab on one side of the soft-pack battery, and at the same time, the upper pressing assembly 4 and the tab protection compatible moving mechanism 5 move upward to protect the tab on the other side of the soft-pack battery;

[0076] 4) Through the cylinder air pressure control and the actual feedback of the pressure sensor, when the pressure sensor feedback value reaches the pressure required for the soft pack battery test side voltage, the side voltage is detected by the probe, and the lithium battery is judged whether it meets the insulation requirements according to the side voltage result;

[0077] 5) After the edge voltage detection is completed, the lower pressure component 2 rises and the edge voltage detection component 4 descends. The production line removes NG and transports it to the next process based on whether the edge voltage of the soft-pack battery is qualified.

[0078] The contents described in the embodiments of this specification are merely an enumeration of implementation forms of the inventive concept. The protection scope of the present invention should not be regarded as limited to the specific forms described in the embodiments. The protection scope of the present invention also includes equivalent technical means that can be thought of by those skilled in the art based on the inventive concept.

Claims

1. A soft pack battery side voltage detection device, characterized in that: include: The support unit has a mounting platform on the top, and the mounting platform is provided with a first hollow mounting hole and a second hollow mounting hole for mounting the battery pressing unit and the tab pressing unit; The battery pressing unit comprises a lower pressing component and an upper pressing component, wherein the lower pressing component comprises a lower pressing driving mechanism and an upper pressing plate, wherein the lower pressing driving mechanism is slidably embedded in the first hollow mounting hole of the supporting unit, and the force-applying end of the lower pressing driving mechanism is kept extending from the hollow mounting hole and falling below the mounting platform, so as to apply pressure to the soft-pack battery; the upper pressing plate is installed at the force-applying end of the lower pressing driving mechanism, so as to contact the upper surface of the body of the soft-pack battery to apply pressure thereto; the upper pressing component comprises a supporting base, a pressing driving mechanism and a lower pressing plate, wherein the supporting base is arranged below the lower pressing component, so as to support the pressing driving mechanism; the pressing driving mechanism is arranged on the supporting base, and the pressing end of the pressing driving mechanism is slidably fitted with the lower pressing plate, and the lower pressing plate is kept parallel to the upper pressing plate, and a clamping area for accommodating lithium batteries is left between the two; A side voltage detection unit, comprising a tab pressing and conducting mechanism and a tab protection compatible moving mechanism, wherein the tab pressing and conducting mechanism comprises a tab pressing assembly and a tab conducting mechanism, wherein the tab pressing assembly is embedded in the second hollow mounting hole, and is used to press down and press the tab of the soft-pack battery; the tab conducting mechanism is installed at the pressing end of the pressing drive mechanism, and is directly opposite to the tab pressing assembly, and is used to achieve conduction between the tab of the soft-pack battery and the tab pressing assembly to perform a side voltage test on the tab; the tab protection compatible moving mechanism is arranged between the support base and the lower pressing plate, and comprises a horizontal moving part and a vertical lifting part, wherein the horizontal moving part is slidably arranged on the support base of the upper pressing assembly, and is used to adjust the horizontal position of the vertical lifting part to be compatible with different types of soft-pack batteries; the vertical lifting part is installed on the horizontal moving part, and the lifting end of the vertical lifting part passes through the through hole of the lower pressing plate, and is used to drive the lower pressing plate to move horizontally while supporting the tab of the soft-pack battery; And a control unit, including a controller and a plurality of pressure sensors, wherein the voltage test connection end of the controller is electrically connected to the test connection port of the tab pressing assembly, and is used to perform a side voltage test on the soft-pack battery; the pressure sensors are respectively arranged at the battery pressing unit and the tab protection compatible mobile mechanism, and are used to feed back the pressure value to the controller; the signal output end of the controller is respectively electrically connected to the action control end of the battery pressing unit and the tab protection compatible mobile mechanism, and is used to control the operation of the battery pressing unit and the tab protection compatible mobile mechanism; The tab pressing assembly includes a probe, a probe pad, a thin cylinder and a cylinder mounting plate. The probe is a functional component used to detect the side voltage when in contact with the negative tab; the probe is connected to the thin cylinder through the probe pad; the thin cylinder is installed and connected to the support plate of the support unit through the cylinder mounting plate; The tab conduction mechanism includes a compatible conduction mechanism and a tab pad, wherein the tab pad is arranged on one side of the second fixing plate, adjacent to the compatible conduction mechanism, and used to support and protect the tab of the soft-pack battery; the compatible conduction mechanism is arranged on the second fixing plate, adjacent to the lower pressing plate, and opposite to the tab pressing assembly, and is used to be compatible with different types of soft-pack batteries; The horizontal moving part of the tab protection compatible mobile mechanism is a supporting slide rail base, and the vertical lifting part includes a lifting cylinder component, a third sliding component and a tab support block. The supporting slide rail base includes a flat plate and a movable slide rail, and the flat plate is used to install the supporting lifting cylinder component; the movable slide rail has two groups, which are installed on the supporting flat plate and connected to the lower surface of the flat plate through fixings; the lifting cylinder component is a power component, which is installed and connected to the flat plate and is used to provide power for the lifting movement of the tab protection compatible mobile mechanism; the tab support block is arranged on the third fixed plate, and passes through the lower pressure plate to support and protect the tabs of the soft-pack battery.

2. A soft pack battery side voltage detection device as claimed in claim 1, characterized in that: The support unit includes a support plate as a mounting platform and a plurality of support columns. The support plate is mounted on the edge voltage detection area of ​​the production line through the support columns, and a first hollow mounting hole and a second hollow mounting hole are provided on the support plate, and the first hollow mounting hole is adjacent to the second hollow mounting hole.

3. A soft pack battery side voltage detection device as claimed in claim 1, characterized in that: The pressing drive mechanism includes a pressing cylinder component, a first sliding component and a fixed component. The pressing cylinder component is a power component, which provides power for lifting and lowering the pressing assembly. It is slidably connected to the fixed component through the first sliding component, so that the pressing cylinder component can be lifted and lowered axially along the first sliding component. The pressing end of the pressing cylinder component is fixedly connected to the upper pressure plate for applying pressure to the surface of the soft-pack battery. The first sliding component has at least two groups, which are symmetrically arranged on both sides of the cylinder component, and its sliding part is connected to the cylinder component, and its guide is connected to the fixed component, which is used to provide guidance for the lifting and lowering movement of the pressing assembly. The fixed component corresponds to the first sliding component one by one, and the fixed component is embedded in the first hollow mounting hole of the support plate. The fixed component is symmetrically arranged on the outside of the first sliding component for supporting the pressing assembly.

4. A soft pack battery side voltage detection device as claimed in claim 3, characterized in that: The pressing cylinder component comprises a pressing cylinder, a floating joint, a cushion block and a first fixed plate, wherein the pressing cylinder is connected to the cushion block via a floating joint, the cushion block is connected to the first fixed plate, and the first fixed plate is connected to the upper pressing plate and keeps the upper pressing plate level; The guide portion of the first sliding component is a first sliding rail arranged vertically, and the sliding portion includes a first sliding block and a sliding plate. The first sliding component is connected to the fixed component through the first sliding rail; the sliding plate of the first sliding component is connected to the first fixed plate of the cylinder component to achieve the connection between the first sliding component and the downward pressing cylinder component; the first sliding rail and the sliding plate are connected and matched through the first sliding block, so that the downward pressing cylinder component slides axially along the first sliding rail under the drive of the sliding plate to adjust the longitudinal position of the cylinder component; The fixing components include a fixing plate and reinforcing ribs; the fixing plates are symmetrically arranged at the first hollow mounting holes of the supporting plate, and are fixedly connected to the lower surface of the supporting plate through the reinforcing ribs; the fixing plates are located on the outer side of the first slide rail and are connected to the corresponding first slide rail, so that the two sets of first sliding components are symmetrically arranged at the first hollow mounting holes of the supporting plate; the reinforcing ribs have four groups, two groups form a pair, and are symmetrically arranged on the front and rear sides of the fixing plate.

5. A soft pack battery side voltage detection device as claimed in claim 1, characterized in that: The support base is used to support the upper pressure assembly, including a support plate and a support vertical plate. The support plate is used to install the support cylinder component. There are two groups of support vertical plates, which are symmetrically arranged on the lower surface of the support plate and are used to directly fix the production line; The clamping drive mechanism is a power component, which is installed and connected on the supporting plate, and is used to provide power for the lifting and lowering movement of the upper pressure assembly, including a clamping cylinder, a second sliding component and a second fixed plate; the clamping cylinder is installed and fixed on the supporting plate, and the joint end of the clamping cylinder is connected to the second fixed plate; the second sliding component has two groups, which provide guidance for the lifting and lowering movement of the upper pressure assembly, are symmetrically arranged on both sides of the clamping cylinder component, and are connected to the supporting base and the lower pressure plate; the lower pressure plate is connected to the second fixed plate, and is used to support the soft-pack battery.

6. A soft pack battery side voltage detection device as claimed in claim 1, characterized in that: The lifting cylinder component includes a lifting cylinder and a third fixed plate; the lifting cylinder is installed and fixed on a flat plate, and the joint end of the lifting cylinder is connected to the third fixed plate; the third sliding component has two groups, which provide guidance for the lifting and lowering movement of the tab protection compatible moving mechanism, are symmetrically arranged on both sides of the lifting cylinder component, and are connected to the supporting slide rail base and the third fixed plate.

7. A soft pack battery side voltage detection device as claimed in claim 1, characterized in that: There are two pressure sensors, namely the first pressure sensor and the second pressure sensor, wherein the first pressure sensor is arranged between the clamping cylinder of the upper pressure component and the second fixed plate, that is, the joint end of the clamping cylinder is connected to the pressure sensor, and the pressure sensor is connected to the second fixed plate, and the signal output end of the first pressure sensor is electrically connected to the signal input end of the controller, for controlling the pressure value between the lower pressure component and the upper pressure component; the second pressure sensor is arranged between the lifting cylinder and the third fixed plate of the lifting cylinder component, the joint end of the lifting cylinder is connected to the pressure sensor, and the second pressure sensor is connected to the third fixed plate, and the signal output end of the second pressure sensor is electrically connected to the signal input end of the controller, for controlling the pressure value between the tab protection compatible moving mechanism and the soft-pack battery.

8. A method for measuring the edge voltage using the soft pack battery edge voltage detection device according to claim 7, characterized in that: The following steps are involved: 1) The soft pack battery side voltage detection device is fixed to the production line through the support base of the bracket assembly and the upper pressure assembly; 2) After different types of soft-pack batteries are received, the compatible conduction mechanism of the soft-pack battery side voltage detection device and the compatible moving mechanism of the tab protection are adjusted according to the size of the incoming soft-pack batteries to meet the actual soft-pack battery model and size requirements; 3) After the soft-pack battery is loaded in place, the cylinder component of the lower pressure assembly starts to descend. Under the guidance of the first sliding component, the upper pressure plate slowly descends. When the lower pressure plate contacts the upper surface of the soft-pack battery, the soft-pack battery is pressed; at this time, the tab pressing assembly presses down and contacts the tab on one side of the soft-pack battery. At the same time, the upper pressure assembly and the tab protection compatible moving mechanism move upward to protect the tab on the other side of the soft-pack battery; 4) Through the control of the cylinder air pressure and the actual feedback of the pressure sensor, when the pressure sensor feedback value reaches the pressure required for the soft pack battery test side voltage, the side voltage is detected by the probe, and the lithium battery is judged whether it meets the insulation requirements according to the side voltage result; 5) After the edge voltage detection is completed, the lower pressure component rises and the edge voltage detection component descends. The production line removes NG and transports it to the next process based on whether the edge voltage of the soft-pack battery is qualified.

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