A soft-pack lithium battery forming tab contact device and a constructed forming equipment

Abstract

This invention discloses a tab contact device for the formation of a soft-pack lithium battery, comprising: a mounting base, including an upper mounting base and a lower mounting base arranged opposite to each other; a linked tab contact mechanism, including tab contact structures and tab clamping structures arranged opposite to each other and in parallel, the tab contact structures and tab clamping structures being respectively disposed on both sides of the mounting base, the two ends of the tab contact structures being fixedly connected to the upper mounting base and the lower mounting base respectively, and the two ends of the tab clamping structure being slidably connected to the upper mounting base and the lower mounting base respectively; and a driving mechanism disposed on the mounting base, the telescopic end of the driving mechanism being connected to the tab clamping plate mechanism; this invention also includes a formation device. The beneficial effects of this invention are: when folded, the tab contact plate and the battery tab are pressed together, ensuring conductivity stability and charging / discharging effect; when unfolded in a staggered manner, the thickness is reduced, without damaging the tab contact device, and the pneumatic pressure condition is met.

Description

Technical Field

[0001] This invention relates to a forming tab contact device and a forming apparatus for a pouch lithium battery, and more particularly to a unfoldable and foldable forming tab contact device and forming apparatus for a pouch lithium battery. Background Technology

[0002] In the manufacturing process of lithium batteries, formation is a crucial step in improving their electrical performance. Formation involves activating the active materials inside the battery by passing an appropriate low current through the electrodes of the initially formed battery.

[0003] Pouch lithium batteries typically require high temperature and high pressure during formation. Current technology generally involves heating plates, placing the pouch lithium battery between them, and then using a motor or cylinder to compress multiple plates, thus simultaneously heating and pressurizing the pouch lithium battery between two plates. A tab contact mechanism is installed on one side of each plate, allowing the battery tabs to connect with the mechanism during heating and pressurization, thereby enabling energization. However, in actual lithium battery formation processes, to improve production efficiency, situations often arise where there are no pouch lithium batteries between several plates, i.e., a vacuum situation. If there are no pouch lithium batteries between plates, the existing formation equipment's plate compression will damage the tab contact device, as it cannot support vacuum pressure. Summary of the Invention

[0004] The purpose of this invention is to provide a soft-pack lithium battery formation tab contact device and a formation equipment that addresses the shortcomings of existing technologies. In particular, it relates to a soft-pack lithium battery formation tab contact device that can be unfolded and folded, which can ensure the stability of conductivity and charging effect, meet the air pressure conditions of the formation equipment, and is more conducive to production automation and efficiency.

[0005] The present invention provides a soft-pack lithium battery formation tab contact device, characterized in that it comprises:

[0006] Mounting base, including an upper mounting base and a lower mounting base that are positioned opposite to each other;

[0007] The linkage electrode contact mechanism includes an electrode contact structure and an electrode clamping structure arranged opposite and parallel to each other. The electrode contact structure and the electrode clamping structure are respectively disposed on both sides of the mounting base. The two ends of the electrode contact structure are fixedly connected to the upper mounting base and the lower mounting base, respectively. The two ends of the electrode clamping structure are slidably connected to the upper mounting base and the lower mounting base, respectively. The sliding movement of the electrode contact structure and the electrode clamping structure relative to each other causes the linkage electrode contact mechanism to move between an unfolded state and a folded state.

[0008] A drive mechanism is provided on the mounting base. The telescopic end of the drive mechanism is connected to the tab pressure plate mechanism and is used to drive the linkage tab contact mechanism to switch between a folded state and an unfolded state.

[0009] Preferably, the tab clamping structure is disposed on the opposite side of the tab contact structure, including an intermediate raising mechanism and a tab clamping plate mechanism that are slidably connected to each other. The two ends of the intermediate raising mechanism are slidably disposed on the upper mounting base and the lower mounting base; the tab clamping plate mechanism is slidably disposed on the intermediate raising mechanism. Both the intermediate raising mechanism and the tab clamping plate mechanism can slide in a direction parallel to the tab contact structure. The sliding movement of the tab contact structure, the intermediate raising mechanism, and the tab clamping structure relative to each other causes the linked tab contact mechanism to move between an unfolded state and a folded state. In the folded state, the tab contact mechanism, the intermediate raising mechanism, and the tab clamping plate mechanism are in an overlapping posture in the thickness direction of the tab contact plate; in the unfolded state, the tab contact mechanism, the intermediate raising mechanism, and the tab clamping plate mechanism are in a staggered posture in the parallel direction of the tab contact plate.

[0010] Preferably, the upper and lower surfaces of the upper mounting base are respectively provided with a first upper sliding groove structure and a first lower sliding groove structure;

[0011] The upper and lower surfaces of the lower mounting base are respectively provided with a second upper sliding groove structure and a second lower sliding groove structure;

[0012] The groove structures are all arranged in a horizontal direction parallel to the tab contact structure.

[0013] Preferably, both the side of the upper mounting base and the side of the lower mounting base are provided with limiting step holes.

[0014] Preferably, the electrode contact structure includes an electrode contact plate, a base plate, an elastic element, and a limiting rod;

[0015] The base plate is fixedly disposed on the first side of the upper mounting base and the lower mounting base;

[0016] The tab contact plate is parallel to and directly opposite the base plate, and the tab contact plate is provided with a tab contact area that can contact the battery tab;

[0017] The elastic element is disposed between the tab contact plate and the base plate, and is connected to the base plate;

[0018] The limiting rod is slidably inserted into the mounting base and the base plate, and the tail of the limiting rod is connected to the electrode contact plate, while the head is engaged with the limiting step hole.

[0019] More preferably, the limiting rod includes an integrally formed cylindrical rod body and a head. The cylindrical rod body passes through the mounting base and the base plate, and the head of the limiting rod engages with a corresponding limiting step hole in the mounting base to prevent the limiting rod from dislodging from the mounting base. The limiting rod can slide along its own axial direction in the mounting base and the base plate. An elastic element is added between the electrode contact plate and the base plate to achieve buffering between the electrode contact plate and the base plate.

[0020] Preferably, the elastic element is a tower-shaped spring, and the number is 6-14. The elastic element is disposed between the electrode contact plate and the base plate, and has a certain preload to provide a buffering effect.

[0021] Preferably, the intermediate raising mechanism includes an upper slider, a lower slider, an intermediate pad, a limiting step rod, and a spring;

[0022] The intermediate pad has a first side and a second side opposite to each other, and the upper slider and the lower slider are respectively provided at both ends of the first side.

[0023] The upper slider is slidably connected to the top of the upper mounting base;

[0024] The lower slider is slidably connected to the bottom of the lower mounting base;

[0025] The spring is fitted onto the limiting connecting rod, and the tail of the limiting connecting rod is connected to the end of the intermediate pad, while the head is inserted into the corresponding upper or lower slider.

[0026] Preferably, the upper slider and the lower slider are mirror-symmetrical structures, respectively symmetrically arranged at both ends of the first side of the intermediate pad, and the side of the upper slider and the side of the lower slider are provided with a first step limiting hole that can be adapted to the head of the limiting connecting rod.

[0027] Preferably, the limiting connecting rod is slidably inserted into the first step limiting hole of the upper slider and the lower slider, and the tail of the limiting connecting rod is connected to the intermediate pad, and the head of the limiting connecting rod is engaged with the first step limiting hole to prevent the limiting connecting rod from coming out of the upper slider or the lower slider.

[0028] Preferably, the upper and lower end faces of the upper slider are respectively provided with a first upper slide rail structure and a first lower slide rail structure that are parallel to each other. The first upper slide rail structure is slidably engaged with the upper part of the electrode pressure plate mechanism, and the first lower slide rail structure is slidably engaged with the first lower slide groove structure.

[0029] Preferably, the upper and lower end faces of the lower slider are respectively provided with a second upper slide rail structure and a second lower slide rail structure that are parallel to each other. The second upper slide rail structure is slidably engaged with the second lower slide groove structure, and the second lower slide rail structure is slidably engaged with the lower part of the electrode tab pressure plate mechanism.

[0030] Preferably, the electrode clamping plate mechanism includes a clamping plate, an upper slider, a lower slider, a long limiting step rod, and a long spring;

[0031] The pressure plate has a first surface and a second surface facing each other, and the upper slide head and the lower slide head are respectively provided at the upper and lower ends of the first surface;

[0032] The bottom of the upper slider is provided with a first sliding groove structure, which slides in cooperation with the first upper slide rail structure.

[0033] The top of the sliding head is provided with a second sliding groove structure, which slides in cooperation with the second sliding rail structure.

[0034] The long limiting connecting rod is fitted with the long spring, the tail of the long limiting connecting rod is connected to the end of the pressure plate, and the head is inserted into the corresponding upper slide head or lower slide head.

[0035] Preferably, the upper slider and the lower slider are provided with a second step limiting hole on their sides, and the long limiting connecting rod is slidably inserted into the second step limiting hole of the upper slider or the lower slider; the tail of the long limiting connecting rod is connected to the pressure plate, and the head of the long limiting connecting rod is engaged with the second step limiting hole to prevent the long limiting connecting rod from coming out of the upper slider or the lower slider.

[0036] A formation apparatus according to the present invention, comprising a soft-pack lithium battery formation tab contact device, characterized in that: it includes at least one pair of parallel and spaced-apart formation clamping plate assemblies, each of the formation clamping plate assemblies including a sink plate and two sets of soft-pack lithium battery formation tab contact devices symmetrically arranged on the sink plate; the two sets of soft-pack lithium battery formation tab contact devices are arranged side by side at opposite ends of the sink plate via corresponding mounting bases, for jointly clamping the tabs of the battery.

[0037] The positions of the two sets of soft-pack lithium battery formation tab contact devices at both ends of each of the aforementioned plates can be adjusted according to the size of the soft-pack lithium battery.

[0038] The beneficial effects of this invention are: when the device is folded, the tab contact plate is pressed together with the battery tab, which can ensure the stability of conductivity and the charging and discharging effect; when the device is unfolded in a staggered manner, the overall thickness of the device is reduced, and the tab contact device can be undamaged even when there is no battery in the formation equipment plate, thus meeting the air pressure conditions. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the sink plate and tab contact device of the soft-pack lithium battery formation equipment of the present invention.

[0040] Figure 2 This is a schematic diagram of the structure of the electrode contact device for the soft-pack lithium battery formation in this invention when folded.

[0041] Figure 3 This is a schematic diagram of the structure of the electrode contact device for the soft-pack lithium battery formation in this invention when it is unfolded.

[0042] Figure 4 This is a structural diagram of the electrode contact mechanism in this invention.

[0043] Figure 5 This is an exploded view of the electrode contact mechanism in this invention.

[0044] Figure 6 This is a structural diagram of the intermediate elevation mechanism in this invention.

[0045] Figure 7 This is an exploded view of the intermediate elevation mechanism in this invention.

[0046] Figure 8 This is a structural diagram of the electrode clamping plate mechanism in this invention.

[0047] Figure 9 This is an exploded view of the electrode clamping plate mechanism in this invention. Detailed Implementation

[0048] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0049] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0050] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0051] The present invention provides a soft-pack lithium battery forming tab contact device 200, comprising:

[0052] The mounting base includes an upper mounting base 211 and a lower mounting base 212 that are disposed opposite to each other;

[0053] The linkage tab contact mechanism 260 includes a tab contact structure 220 and a tab clamping structure 270 arranged opposite to each other and in parallel. The tab contact structure 220 and the tab clamping structure 270 are respectively disposed on both sides of the mounting base. The two ends of the tab contact structure 220 are fixedly connected to the upper mounting base 211 and the lower mounting base 212, respectively. The two ends of the tab clamping structure 270 are slidably connected to the upper mounting base 211 and the lower mounting base 212, respectively. The sliding movement of the tab contact structure 220 and the tab clamping structure 270 relative to each other causes the linkage tab contact mechanism to move between an unfolded state and a folded state.

[0054] A drive mechanism 250 is provided on the mounting base. The telescopic end of the drive mechanism 250 is connected to the tab clamping structure 270 and is used to drive the linkage tab contact mechanism to switch between a folded state and an unfolded state.

[0055] In this invention, both the tab contact structure 220 and the tab clamping structure 270 are elongated components.

[0056] In some embodiments of the present invention, the electrode clamping structure 270 is disposed on the opposite side of the electrode contact structure, and includes an intermediate raising mechanism 230 and an electrode clamping plate mechanism 240 slidably connected to each other. The two ends of the intermediate raising mechanism 230 are slidably disposed on the upper mounting base 211 and the lower mounting base 212; the electrode clamping plate mechanism 240 is slidably disposed on the intermediate raising mechanism 230. Both the intermediate raising mechanism 230 and the electrode clamping plate mechanism 240 can be arranged parallel to the electrode contact structure 220. The sliding motion of the tab contact structure 220, the intermediate elevation mechanism 230, and the tab pressing structure relative to each other causes the linked tab contact mechanism to move between an unfolded state and a folded state. In the folded state, the tab contact mechanism, the intermediate elevation mechanism, and the tab pressing mechanism are in an overlapping posture in the thickness direction of the tab contact plate. In the unfolded state, the tab contact mechanism, the intermediate elevation mechanism, and the tab pressing mechanism are in a misaligned posture in the parallel direction of the tab contact plate.

[0057] In some embodiments of the present invention, the upper and lower surfaces of the upper mounting base 211 are respectively provided with a first upper sliding groove structure 2111 and a first lower sliding groove structure 2112; the upper and lower surfaces of the lower mounting base 212 are respectively provided with a second upper sliding groove structure 2121 and a second lower sliding groove structure 2122; the first upper sliding groove structure 2111, the first lower sliding groove structure 2112, the second upper sliding groove structure 2121, and the second lower sliding groove structure 2122 are all arranged in a horizontal direction parallel to the tab contact structure.

[0058] In some embodiments of the present invention, the first upper sliding groove structure 2111 and the second upper sliding groove structure 2121 are both inverted T-shaped sliding groove structures. The first lower sliding groove structure 2112 is a rectangular groove structure. The second lower sliding groove structure 2122 is a T-shaped sliding groove structure.

[0059] In some embodiments of the present invention, the side of the upper mounting base 211 and the side of the lower mounting base 212 are provided with limiting step holes.

[0060] In some embodiments of the present invention, the tab contact structure 220 includes a tab contact plate 221, a base plate 223, an elastic element 222, and a limiting rod 224;

[0061] The base plate 223 is a slender plate and is fixedly mounted on the first side of the upper mounting base 211 and the lower mounting base 212.

[0062] The tab contact plate 221 is parallel to and directly opposite the base plate 223, and the tab contact plate 221 is provided with a tab contact area that can contact the battery tab.

[0063] The elastic element 222 is disposed between the tab contact plate 221 and the base plate 223, and is connected to the base plate 223;

[0064] The limiting rod 224 is slidably inserted into the mounting base and the base plate 223, and the tail of the limiting rod 224 is connected to the electrode contact plate 221, while the head is engaged with the limiting step hole.

[0065] In some embodiments of the present invention, the limiting rod 224 includes an integrally formed cylindrical rod body and a head. The cylindrical rod body passes through the mounting base and the base plate 223, and the head of the limiting rod 224 engages with the corresponding limiting step hole of the mounting base to prevent the limiting rod from dislodging from the mounting base. The limiting rod 224 can slide along its own axial direction in the mounting base and the base plate. An elastic element 222 is added between the electrode contact plate 221 and the base plate 223 to achieve buffering between the electrode contact plate and the base plate.

[0066] In some embodiments of the present invention, the elastic element 223 is a tower-shaped spring, and there are 6-14 of them. The elastic element 223 is distributed between the tab contact plate 221 and the base plate 223, and has a certain preload, which can play a buffering role.

[0067] In some embodiments of the present invention, the intermediate raising mechanism 230 includes an upper slider 231, a lower slider 232, an intermediate pad 233, a limiting step rod 234, and a spring 235;

[0068] The intermediate pad 233 is a slender plate with a first side and a second side opposite to each other. The upper slider 231 and the lower slider 232 are respectively provided at the two ends of the first side.

[0069] The upper slider 231 is slidably connected to the top of the upper mounting base 211;

[0070] The lower slider 232 is slidably connected to the bottom of the lower mounting base 212;

[0071] The spring 235 is sleeved on the limiting connecting rod 234, and the tail of the limiting connecting rod 234 is connected to the end of the intermediate pad 233, while the head is inserted into the corresponding upper slider 231 or lower slider 232.

[0072] In some embodiments of the present invention, the upper slider 231 and the lower slider 232 are mirror-symmetrical structures, respectively symmetrically arranged at both ends of the first side of the intermediate pad 233. The side of the upper slider 231 and the side of the lower slider 232 are provided with a first step limiting hole that can be adapted to the head of the limiting connecting rod 234.

[0073] In some embodiments of the present invention, the limiting connecting rod 234 is slidably inserted into the first step limiting hole of the upper slider 231 and the lower slider 232, and the tail of the limiting connecting rod 234 is connected to the intermediate pad 233, and the head of the limiting connecting rod 234 is engaged with the first step limiting hole to prevent the limiting connecting rod from coming out of the upper slider or the lower slider.

[0074] In some embodiments of the present invention, the upper and lower end faces of the upper slider 231 are respectively provided with a first upper slide rail structure 2311 and a first lower slide rail structure 2312 that are parallel to each other. The first upper slide rail structure 2311 is slidably engaged with the upper part of the electrode pressure plate mechanism 240, and the first lower slide rail structure 2312 is inserted into the first lower slide groove structure 2112 and slidably engaged with the first lower slide groove structure 2112.

[0075] In some embodiments of the present invention, the first upper slide rail structure 2311 is a T-shaped slide rail. The first lower slide rail structure 2312 is an inverted T-shaped slide rail adapted to the first upper slide groove structure 2111.

[0076] In some embodiments of the present invention, the upper and lower end faces of the lower slider 232 are respectively provided with a second upper slide rail structure 2321 and a second lower slide rail structure 2322 that are parallel to each other. The second upper slide rail structure 2321 is slidably engaged with the second lower slide groove structure 2122, and the second lower slide rail structure 2322 is slidably engaged with the lower part of the electrode tab pressure plate mechanism 240.

[0077] In some embodiments of the present invention, the second upper slide rail structure 2321 is a T-shaped slide rail adapted to the second lower slide groove structure 2122. The second lower slide rail structure 2322 is an inverted T-shaped slide rail.

[0078] In some embodiments of the present invention, the electrode clamping plate mechanism 240 includes a clamping plate 243, an upper slider 241, a lower slider 242, a long limiting step rod 244, and a long spring 245;

[0079] The pressure plate 243 has a first surface and a second surface facing each other, and the upper slide head 241 and the lower slide head 242 are respectively provided at the upper and lower ends of the first surface;

[0080] The bottom of the upper slider 241 is provided with a first sliding groove structure 2411, and the first sliding groove structure 2411 slides in cooperation with the first upper slide rail structure 2111.

[0081] The top of the sliding head 242 is provided with a second sliding groove structure 2421, and the second sliding groove structure 2421 is slidably engaged with the second sliding rail structure 2122.

[0082] The long limiting connecting rod 244 is fitted with the long spring 245. The tail of the long limiting connecting rod 244 is connected to the end of the pressure plate 243, and the head is inserted into the corresponding upper slide head or lower slide head.

[0083] In some embodiments of the present invention, the first slide rail structure 2411 is a T-shaped slide rail structure adapted to the first upper slide rail structure 2311. The second slide rail structure 2421 is an inverted T-shaped slide rail structure adapted to the second lower slide rail structure 2322.

[0084] In some embodiments of the present invention, the sides of the upper slider 241 and the lower slider 242 are provided with second step limiting holes, and the long limiting connecting rod 244 is slidably inserted into the second step limiting hole of the upper slider or the lower slider; the tail of the long limiting connecting rod 244 is connected to the pressure plate 243, and the head of the long limiting connecting rod 244 is engaged with the second step limiting hole to prevent the long limiting connecting rod from coming out of the upper slider or the lower slider.

[0085] In some embodiments of the present invention, the top of the upper slider 241 is a triangular guide tip. In other embodiments of the present invention, the top of the pressure plate 243 is inclined to the side beyond the tab contact plate 221.

[0086] In some embodiments of the present invention, the driving mechanism 250 is a cylinder, and there are two cylinders. The output end of the driving mechanism 250 extends and retracts along the sliding direction of the electrode clamping structure. The output end of the first set of driving mechanisms 250 is connected to the upper sliding head and is mounted on the upper mounting base 211; the output end of the second set of driving mechanisms 250 is connected to the lower sliding head and is mounted on the lower mounting base 212.

[0087] A formation apparatus according to the present invention, comprising a soft-pack lithium battery formation tab contact device, includes at least a pair of parallel and spaced-apart formation clamping plate assemblies 100, each of the formation clamping plate assemblies 100 including a sink plate 1 and two sets of soft-pack lithium battery formation tab contact devices 200 symmetrically arranged on the sink plate; the two sets of soft-pack lithium battery formation tab contact devices 200 are arranged side by side at opposite ends of the sink plate 1 via corresponding mounting bases, for jointly clamping the tabs of the battery.

[0088] Each of the sink plates 1 has two sets of soft-pack lithium battery formation tab contact devices symmetrically arranged at both ends, and the position of the soft-pack lithium battery formation tab contact devices can be adjusted according to the size of the soft-pack lithium battery.

[0089] During formation, the pouch lithium battery is located between the front and rear formation components 100. The tab contact mechanism 220 of the front formation component 100 presses the tab of the pouch lithium battery onto the electrode pressing plate mechanism 240 of the rear formation component 100, making the pouch lithium battery conductive. If there is no pouch lithium battery between the front and rear formation components 100 of the pouch lithium battery formation equipment, the tab contact device 200 will stagger the tab contact mechanism 220, the intermediate shim mechanism 230, and the tab pressing plate mechanism 240 to prevent damage to the tab contact device 200 when the sink plate 1 is compressed.

[0090] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0091] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0092] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0093] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0094] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0095] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A forming tab contact device for a soft-pack lithium battery, characterized in that, include: Mounting base, including an upper mounting base and a lower mounting base that are positioned opposite to each other; The linked electrode contact mechanism includes an electrode contact structure and an electrode clamping structure arranged opposite and parallel to each other. The electrode contact structure and the electrode clamping structure are respectively disposed on both sides of the mounting base. The two ends of the electrode contact structure are fixedly connected to the upper mounting base and the lower mounting base, respectively. The two ends of the electrode clamping structure are slidably connected to the upper mounting base and the lower mounting base, respectively. The sliding movement of the electrode contact structure and the electrode clamping structure relative to each other causes the linked electrode contact mechanism to move between an unfolded state and a folded state. The electrode contact structure includes an electrode contact plate, a base plate, an elastic element, and a limiting rod. And a drive mechanism, which is disposed on the mounting base, wherein the telescopic end of the drive mechanism is connected to the tab clamping structure, and is used to drive the linkage tab contact mechanism to switch between a folded state and an unfolded state. The electrode clamping structure includes an intermediate raising mechanism and an electrode clamping plate mechanism that are slidably connected to each other. The two ends of the intermediate raising mechanism are slidably disposed on the upper mounting base and the lower mounting base. The electrode clamping plate mechanism is slidably disposed on the intermediate raising mechanism. Both the intermediate raising mechanism and the electrode clamping plate mechanism can slide in a direction parallel to the electrode contact structure. The sliding movement of the electrode contact structure, the intermediate raising mechanism, and the electrode clamping structure relative to each other causes the linked electrode contact mechanism to move between an unfolded state and a folded state. In the folded state, the electrode contact mechanism, the intermediate raising mechanism, and the electrode clamping plate mechanism are in an overlapping posture in the thickness direction of the electrode contact plate. In the unfolded state, the electrode contact mechanism, the intermediate raising mechanism, and the electrode clamping plate mechanism are in a staggered posture in the parallel direction of the electrode contact plate. The upper and lower surfaces of the upper mounting base are provided with a first upper sliding groove structure and a first lower sliding groove structure; the upper and lower surfaces of the lower mounting base are provided with a second upper sliding groove structure and a second lower sliding groove structure; the first upper sliding groove structure, the first lower sliding groove structure, the second upper sliding groove structure, and the second lower sliding groove structure are all arranged in a horizontal direction parallel to the electrode contact structure.

2. The soft-pack lithium battery formation tab contact device as described in claim 1, characterized in that: The base plate is fixedly disposed on the first side of the upper mounting base and the lower mounting base; The tab contact plate is parallel to and directly opposite the base plate, and the tab contact plate is provided with a tab contact area that can contact the battery tab; The elastic element is disposed between the tab contact plate and the base plate, and is connected to the base plate; The limiting rod is slidably inserted into the mounting base and the base plate, and the tail of the limiting rod is connected to the electrode contact plate.

3. The soft-pack lithium battery formation tab contact device as described in claim 2, characterized in that: The intermediate raising mechanism includes an upper slider, a lower slider, an intermediate pad, a limiting step rod, and a spring; The intermediate pad has a first side and a second side opposite to each other, and the upper slider and the lower slider are respectively provided at both ends of the first side. The upper slider is slidably connected to the top of the upper mounting base; The lower slider is slidably connected to the bottom of the lower mounting base; The spring is sleeved on the limiting step rod, the limiting step rod passes through the corresponding upper slider or lower slider, and the tail of the limiting step rod is connected to the end of the intermediate pad, while the head is inserted into the corresponding upper slider or lower slider.

4. The soft-pack lithium battery formation tab contact device as described in claim 3, characterized in that: The upper slider and the lower slider are mirror-symmetrical structures, and are respectively symmetrically arranged at both ends of the first side of the intermediate pad.

5. The soft-pack lithium battery formation tab contact device as described in claim 4, characterized in that: The upper and lower end faces of the upper slider are respectively provided with a first upper slide rail structure and a first lower slide rail structure that are parallel to each other. The first upper slide rail structure is slidably engaged with the upper part of the electrode pressure plate mechanism, and the first lower slide rail structure is slidably engaged with the first lower slide groove structure.

6. The soft-pack lithium battery formation tab contact device as described in claim 5, characterized in that: The upper and lower end faces of the lower slider are respectively provided with a second upper slide rail structure and a second lower slide rail structure that are parallel to each other. The second upper slide rail structure is slidably engaged with the second lower slide groove structure, and the second lower slide rail structure is slidably engaged with the lower part of the electrode tab pressure plate mechanism.

7. The soft-pack lithium battery formation tab contact device as described in claim 6, characterized in that: The electrode clamping plate mechanism includes a clamping plate, an upper slider, a lower slider, a long limiting step rod, and a long spring; The pressure plate has a first surface and a second surface facing each other, and the upper slide head and the lower slide head are respectively provided at the upper and lower ends of the first surface; The bottom of the upper slider is provided with a first sliding groove structure, which slides in cooperation with the first upper slide rail structure. The top of the sliding head is provided with a second sliding groove structure, which slides in cooperation with the second sliding rail structure. The long limiting step rod is fitted with the long spring, the tail of the long limiting step rod is connected to the end of the pressure plate, and the head is inserted into the corresponding upper slide head or lower slide head.

8. A formation apparatus constructed from the forming tab contact device for a pouch lithium battery according to claim 7, characterized in that: It includes at least one pair of parallel and spaced-apart formation clamping plate assemblies, each of the formation clamping plate assemblies including a sink plate and two sets of soft-pack lithium battery formation tab contact devices disposed on the sink plate; Two sets of the aforementioned soft-pack lithium battery forming tab contact devices are arranged side by side at opposite ends of the sink plate via corresponding mounting bases, for jointly clamping the battery tabs.

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