Soft pack battery Air cell type Chemical probe Power connection mechanism

Abstract

The present invention discloses a soft pack battery air cell type chemical probe power connection mechanism including a row formed by aluminum plates arranged parallel to each other with a space therebetween, and a power connection device is installed at each of the left and right ends of the aluminum plate, and the power connection devices of adjacent aluminum plates are aligned vertically, the power connection device includes an upper slider, a lower slider, a first air cell unit installed on the front side of the aluminum plate, and a second air cell unit installed on the rear side of the aluminum plate, a tab lead contact plate is attached to the outside of the first air cell unit, and an air cell pressure plate is attached to the outside of the second air cell unit, the end of the aluminum plate is inserted into a sleeve surrounded by the first and second air cell units and the upper and lower sliders, and a reset mechanism including a reset spring is provided between the end of the tab lead contact plate and the upper and lower sliders, and between the end of the air cell pressure plate and the upper and lower sliders, and the tab lead contact plate is connected to an external power source by a current line and a voltage line. A beneficial effect of the present invention is that it automatically adapts to soft-pack batteries of various thicknesses and operates with high accuracy and determinism.

Description

[Technical field]

[0001] The present invention relates to the technical field of high temperature charge / discharge formation equipment for lithium ion polymer batteries, and in particular to a soft pack battery air cell type formation probe power connection mechanism. [Background technology]

[0002] Power soft pack batteries are one of the main batteries applied to new energy vehicles. Power soft pack batteries require high-temperature chemical formation to activate the cells during the finishing process of production, and during the chemical formation process, the battery needs to be charged and discharged by a drive box. In the existing process, the power battery is placed between a pair of clamps, which are high-temperature fixtures, and the clamps pressurize the power battery at high temperature. At the same time, the contact plate probe power connection assembly clamps the battery's tab lead, and the charge and discharge chemical formation process is performed on the power battery to activate the cells. During the battery charging and discharging process, it is necessary to ensure that the contact plate probe power connection assembly and the battery's tab lead are in good contact.

[0003] In the conventional contact plate probe power connection assembly, a tower spring type mechanism is often adopted, and the deformation of the tower spring applies pressure to the tab lead, thereby making good contact between the tab lead and the contact plate of the battery. In practice, the high temperature fixture needs to process various types of power soft pack batteries, and the tower spring type mechanism has obvious limitations. Since the thickness parameters of the power soft pack batteries vary greatly depending on the different types, when the high temperature fixture performs charge / discharge chemical treatment on batteries with different thicknesses, it is necessary to replace the silica gel or contact plate liner with a different thickness for the contact plate probe power connection assembly. Moreover, if the fixture cannot be filled with the actual battery, the empty positions must be filled with a pseudo battery to apply pressure, otherwise the contact plate power connection assembly mechanism will be damaged.

[0004] The tower spring mechanism contact plate probe power connection assembly is inflexible to meet the dimensional requirements of the batteries being processed, and is time-consuming and cumbersome to adjust. When batteries of different thicknesses are processed, a large amount of adjustment work on the fixture is required, which significantly reduces the work efficiency of charging and discharging the Power Soft Pack battery. Without complex adjustment, batteries of different thicknesses cannot be interchanged, and it is not up to the task of processing small batches and a wide variety of batteries. Moreover, the high temperature fixture is easily damaged.

[0005] In order to overcome the drawback that the contact plate probe power connection assembly of the tower spring mechanism lacks flexibility to the change in dimensions of the battery being processed, a contact plate probe power connection assembly of an inflatable mechanism has been presented that utilizes an air cell to provide the contact plate probe power connection assembly with flexibility in stroke. In the "Battery Chemical Formation, Grading Power Connection Device and Battery Chemical Formation, Grading Jig" disclosed in Patent Document 1, an airbag is installed behind the power connection plate, and the power connection plate is pushed by the air inflation of the airbag, and a facing airbag is installed on the adjacent laminated plate to clamp the battery tab lead. The drawback of the inflatable mechanism is that the mechanical parts lack precision and certainty in their operation, but the parts of the jig in the process of battery chemical formation and grading have very high requirements for the precision of their operation and spatial orientation. During the chemical forming and grading process, the battery tab lead is parallel to the laminated plate, but if the power connection plate (i.e., the tab lead contact plate) cannot maintain a spatial orientation parallel to the battery tab lead during the airbag inflation, the power connection plate and the battery tab lead cannot form surface contact, but can only form point contact or line contact. In this situation, the current area and voltage area on the power connection plate cannot be simultaneously conducted with the battery tab lead, resulting in operational failure. If excessive pressure is forcibly applied to ensure that the power connection plate and the battery tab lead form surface contact, the battery tab lead will easily be deformed or damaged.

[0006] In addition, the resetting of the working parts of the fixture is also inaccurate. In order to control the inflation degree of the airbag after the high-pressure gas is injected, a material with low elasticity and high rigidity coefficient is generally adopted. However, after the high-pressure gas is released, residual deformation occurs in the airbag material, and it cannot fully recover to its original state, so that the parts such as the power connection plate cannot be reset accurately. With the increase in the number of uses, the residual deformation of the airbag becomes larger and larger, and the resetting error of the power connection plate also increases accordingly. As a result, the dimensions of the position of the fixture become less certain, which affects the position where the battery is placed.

[0007] The power connection plate in Patent Document 1 is directly connected to the outer surface of the first airbag, and is attached to the first and second mounting bases by the side position limiting plates and position limiting pins. This design has the following disadvantages. (1) The cross section of the first airbag after air is filled is arched, so it cannot provide stable support for the power connection plate, and the power connection plate is prone to tilt laterally. (2) The reset precision of the power connection plate is poor, and residual deformation occurs in the airbag when the first airbag is deflated, and the residual deformation increases with the increase in the number of uses. Therefore, the power connection plate cannot be reset accurately, and the gap (i.e., position gap) between the power connection plate and the second airbag cannot be accurately controlled, and the battery tab lead is likely to be interfered with when the battery tab lead is inserted, causing deformation of the tab lead. The position limiting plates and position limiting pins installed at the end of the power connection plate can limit the maximum stroke of the power connection plate, but cannot guarantee the spatial posture during the movement of the power connection plate, and once the power connection plate tilts, the battery tab lead and the power connection plate cannot make good contact with each other. For this reason, the connection between the power connection plate and the battery tab lead in Patent Document 1 is not certain and reliable, and may even interfere with the tab lead, which is prone to causing air pressure. In serious cases, this may affect the overlapping use of the entire equipment, making it virtually unsuitable for application in production lines. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Chinese patent CN11186410A specification Summary of the Invention

[0009] To overcome the above-mentioned shortcomings of the prior art, the present invention presents a soft-pack battery air cell type formation probe power connection mechanism.

[0010] The soft pack battery air cell type formation probe power connection mechanism of the present invention not only has the flexibility to accommodate the change in dimensions of the batteries being processed, but also has the precision and certainty of the operation of the parts, so that it is highly reliable in large-scale production. The present invention can be applied to soft pack batteries of various thicknesses without the need for adjustment, does not require refilling the pseudo battery when the fixture cannot be filled, can be air pressure, and has improved reliability and certainty of the contact between the tab lead and the power connection mechanism.

[0011] The soft pack battery air cell type chemical probe power connection mechanism of the present invention includes a row formed by aluminum plates arranged parallel to each other with a gap therebetween, the aluminum plates being perpendicular to the vertical axis of the row, an electric heating member being provided on the aluminum plate, the surface of the aluminum plate being covered with an insulating layer, and a position (place, location) for holding a battery being formed in the space between two adjacent aluminum plates, the vertical axis direction of the row being defined as the vertical direction, one of the vertical directions being the forward direction and the other being the rearward direction, the aluminum plate being rectangular, the forward facing surface of the aluminum plate being defined as the front surface, the rear facing surface of the aluminum plate being defined as the rear surface, the extension direction of one side of the aluminum plate being defined as the left-right direction, and the extension direction of the other side being defined as the up-down direction,

[0012] A power connection device is provided at each of the left and right ends of the aluminum plate, and the power connection devices of adjacent aluminum plates are aligned vertically; The power connection device includes an upper slider slidably installed on an upper side of the aluminum plate, a lower slider slidably installed on a lower side of the aluminum plate, a first air cell unit installed on a front surface of the aluminum plate, and a second air cell unit installed on a rear surface of the aluminum plate, The direction of the power connection device closer to the aluminum plate is defined as the inside, and the opposite direction as the outside. A tab lead contact plate is attached to the outside of the first air cell unit, and an air cell pressure plate is attached to the outside of the second air cell unit. Upper and lower sliders are connected to the upper and lower ends of the tab lead contact plate, the first air cell unit, the second air cell unit, and the air cell pressure plate, respectively. The end of the aluminum plate is inserted into a sleeve surrounded by the first air cell unit, the second air cell unit, and the upper slider and the lower slider. A reset mechanism including a reset spring is provided between the end of the tab lead contact plate and the upper slider, and between the end of the air cell pressure plate and the upper slider, and between the end of the air cell pressure plate and the upper slider, and The first air cell unit includes a first air cell fixing plate, and a plurality of first air cells are provided on the outer side of the first air cell fixing plate. The second air cell unit includes a second air cell fixing plate, and a plurality of second air cells are provided on the outer side of the second air cell fixing plate. The first air cells and the second air cells are both strip-shaped and connected to an external air source. The tab lead contact plate is connected to an external power source by a current line and a voltage line.

[0013] Preferably, the number of the first air cells and the second air cells is two, and the first air cells are arranged in parallel along the longitudinal direction of the first air cell fixing plate, and the second air cells are arranged in parallel along the longitudinal direction of the second air cell fixing plate.

[0014] Preferably, the reset mechanism includes a vertical hole provided on the upper slider or the lower slider, a flat head screw movable along the vertical direction of the hole is provided in the hole, a tail of the flat head screw extends from the opening of the hole and is connected to the pin, a compression spring is provided between the cap of the flat head screw and the wall surface of the hole, and the compression spring presses the cap of the flat head screw against the bottom of the hole, among which, the cap of the pin attached to the hole whose opening faces forward is hung on the outside of the tab lead contact plate, and the cap of the pin attached to the hole whose opening faces backward is hung on the outside of the air cell pressure plate.

[0015] Preferably, a cushion is attached to the outer side of the air cell pressure plate of the second air cell unit.

[0016] Preferably, the outer surface of the tab lead contact plate is laterally provided with a current area, a voltage area and a sunken area in this order, extending along the longitudinal direction of the tab lead contact plate, with an insulating gap between the current area and the voltage area, the current area is connected with a current line, the voltage area is connected with a voltage line, the surface of the current area is flush with the surface of the voltage area, and the surface of the sunken area is lower than the surface of the voltage area. In practice, the width of the current area is much wider than the voltage area, and in the situation where the two planes are not parallel, the voltage area is likely not to contact the battery tab lead. The sunken area tilts the battery tab lead towards the voltage area, increasing the chance of the voltage area and the battery tab lead being conductive.

[0017] Preferably, the first air cell and the second air cell are made of a flexible material having a large elastic modulus and excellent heat resistance, such as TPU, and the cushion is made of an electrically insulating and elastic material, such as a silica gel sheet.

[0018] Preferably, a magnetic attraction plate for attracting the upper slider is provided on the upper edge of the aluminum plate, a slide rail is provided on the lower edge of the aluminum plate, and the lower slider is slidably installed within the slide rail.

[0019] Preferably, the top of the upper slider is provided with a tip for guiding the battery into a position, a rectangular groove is opened at the bottom, the upper edge of the aluminum plate passes through the rectangular groove, and the thickness of the aluminum plate matches the width of the rectangular groove; the top of the lower slider is provided with a slide groove that slides into the slide rail, the cross section of the slide groove is inverted T-shaped, and the slide rail passes through the horizontal area of ​​the cross section of the slide groove.

[0020] Preferably, the side block is a separable U-shaped block, and the notch of the vertical through groove of the side block is connected to the side surface of the upper slider or the lower slider.

[0021] The hot press jig for the soft pack battery air cell type chemical probe power connection mechanism according to the present invention is provided with side blocks on both sides of the upper slider and the lower slider, and a vertical through groove is formed on the side block. A fixed block is provided above the end of the aluminum plate, and an interlocking block is provided below the end of the aluminum plate. A vertical mounting hole is provided on the fixed block, and a linear bearing is provided in the vertical mounting hole. A guide shaft is inserted through the linear bearings aligned vertically, the aluminum plates are connected in series in parallel on the guide shaft, the interlocking blocks of adjacent aluminum plates are connected to each other by interlocking members to realize interlocking between the aluminum plates, and a connecting shaft is inserted through the vertical through-groove of the vertically aligned power connection device, and the vertically aligned power connection devices are connected in series on the corresponding connecting shaft.

[0022] The working process of the present invention is as follows: 1) Align the battery tab leads vertically with the power connection devices by adjusting the horizontal spacing of the two rows of power connection devices based on the battery model number. 2) Insert the battery vertically into position using the guide block and upper slider as guides, and adjust the spacing between the aluminum plates so that the battery is clamped between the two aluminum plates, front and rear. 3) When air is introduced into the first air cell and the second air cell, the air enters the first air cell and the second air cell and expands, causing the tab lead contact plate and the air cell pressure plate to protrude outward in the vertical direction, and the tab lead of the battery is clamped together with the tab lead contact plate and the air cell pressure plate on the adjacent aluminum plate in front of it. 4) Connect the current line and voltage line at the bottom end of the tab lead contact plate to the external power supply box to perform the charge / discharge formation process for the power battery. 5) When the air is released from the first air cell and the second air cell, the tab lead contact plate and the air cell pressure plate return to their initial positions due to the action of the reset mechanism. In step 3), the tab lead contact plate is supported by a plurality of first air cells, and the air cell pressure plate is supported by a plurality of second air cells, which corresponds to the tab lead contact plate and the air cell pressure plate being supported by a plurality of arches in the lateral direction, which is helpful in preventing lateral tilt and improving the stability and definiteness of the spatial posture of the tab lead contact plate and the air cell pressure plate, and can effectively prevent the tab lead contact plate from being tilted in the lateral direction when it comes into contact with the battery tab lead.

[0023] Another point to prevent the tab lead contact plate from tilting is how to prevent the tab lead contact plate and the air cell pressure plate from tilting in their own longitudinal direction. The central parts of the tab lead contact plate and the air cell pressure plate are all provided with air cells, and their ends are connected to the upper slider and the lower slider. When the air cells expand, tilt occurs between the ends and the central parts, and it is necessary to prevent this from affecting the spatial attitude of the tab lead contact plate and the air cell pressure plate. A reset mechanism is provided at the part where the ends of the tab lead contact plate and the air cell pressure plate are connected to the upper and lower sliders of the present invention, and the reset mechanism has elasticity. Under the tensile force caused by the expansion of the air cells, the reset mechanism allows the ends of the tab lead contact plate and the air cell pressure plate to move outward together with their central parts, thereby improving the flatness of the tab lead contact plate and the air cell pressure plate in their own longitudinal direction.

[0024] The above measures improve the stability and certainty of the spatial posture of the tab lead contact plate and the air cell pressure plate, ensure that the voltage area and current area of ​​the tab lead contact plate are simultaneously conductive with the battery tab lead, and improve the reliability of the contact between the tab lead contact plate and the battery tab lead.

[0025] In step 4), the cushion also improves the reliability of the contact between the tab lead contact plate and the battery tab lead. When clamping the battery tab lead, if there is a slight misalignment between the air cell pressure plate and the battery tab lead, the effect can be offset by the deformation of the cushion itself. In step 5), when the first air cell and the second air cell are deflated, the spring of the reset mechanism overcomes the residual deformation of the air cell and pulls the tab lead contact plate and the air cell pressure plate back to their initial positions, so that the operating members of the present invention are accurately reset and the position dimensions are more stable during the battery chemical grading process.

[0026] The beneficial effects of the present invention are that it has the flexibility to automatically adapt to the dimensional changes of the batteries being processed, can automatically adapt to soft pack batteries of various thicknesses, can realize the chemical grading of batteries of various model numbers without complicated adjustments or part replacements, and can realize that it will not be damaged by air pressure when the hot press fixture is not full, as well as the precision and certainty of the operating parts and the reliability of the entire fixture, making it suitable for large-scale production applications. [Brief description of the drawings]

[0027] [Figure 1] FIG. 2 is a schematic diagram of a power connection mechanism of the present invention. [Diagram 2] FIG. 2 is a structural schematic diagram of the heat fixture aluminum plate assembly of the present invention. [Diagram 3] FIG. 2 is a structural schematic diagram of the power connection device of the present invention; [Figure 4] FIG. 2 is a schematic diagram showing the use of the power connection device of the present invention. [Diagram 5] FIG. 5 is a front view of FIG. [Figure 6] FIG. 5 is a side view of FIG. 4 of the present invention. [Figure 7] FIG. 7 is an enlarged view of part A in FIG. [Figure 8] FIG. 7 is an enlarged view of part B in FIG. [Figure 9] FIG. 2 is an exploded schematic view of the power connection device of the present invention. [Figure 10] FIG. 2 is a structural diagram of a first air cell unit of the present invention. [Figure 11] FIG. 4 is a structural diagram of a second air cell unit of the present invention. [Figure 12] FIG. 2 is a structural diagram of a hot press jig according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0028] In the following, specific embodiments of the present invention will be described in detail in conjunction with the drawings. It should be understood that the specific embodiments described herein are merely for explaining and interpreting the present invention, and are not intended to limit the present invention.

[0029] In describing the present invention, it should be understood that the orientations or positional relationships indicated by terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like, are based on the orientations or positional relationships shown in the drawings, and are intended to facilitate and simplify the description of the present invention, and do not indicate or imply that the devices or elements referred to necessarily have a specific orientation or are constructed and operated in a specific orientation, and therefore cannot be understood as limitations on the present invention.

[0030] Additionally, the terms "first" and "second" are for descriptive purposes and cannot be understood to indicate or imply a relative importance or number of technical features being referred to. Thus, a feature qualified as "first" or "second" can explicitly or implicitly include at least one of the feature. In the present description, "plurality" means at least two, e.g., two, three, etc., unless otherwise clearly and specifically limited.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "attached", "coupled", "connected", "fixed" and the like should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integral one. It may be a mechanical connection, an electrical connection, or a mutual communication. It may be a direct connection, an indirect connection via an intermediate medium, an internal communication between two elements, or an interactive relationship between two elements, unless otherwise clearly limited. A person skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation.

[0032] In the present invention, unless otherwise clearly specified and limited, when a first feature is "above" or "below" a second feature, the first and second features may be in direct contact, or the first and second features may be in indirect contact via an intermediate medium. Furthermore, when a first feature is "above," "on," or "on the upper surface" of a second feature, the first feature may be directly above or diagonally above the second feature, or it may simply indicate that the horizontal height of the first feature is higher than that of the second feature. When a first feature is "below," "below," or "on the lower surface" of a second feature, the first feature may be directly below or diagonally below the second feature, or it may simply indicate that the horizontal height of the first feature is lower than that of the second feature.

[0033] In the description of this specification, such a statement referring to the terms "one embodiment", "several embodiments", "examples", "specific examples" or "several examples" means that the specific features, structures, materials or characteristics described in the embodiment or example are included in at least one embodiment or example of the present invention in conjunction with the specific features, structures, materials or characteristics described in the embodiment or example. In this specification, general expressions of the above terms do not necessarily have to be for the same embodiment or example. In addition, the specific features, structures, materials or characteristics described can be combined in an appropriate manner in one or more embodiments or examples. In addition, in a situation that is not mutually inconsistent, a person skilled in the art can combine or combine different embodiments or examples described in this specification and features of different embodiments or examples.

[0034] The invention will now be described in detail with reference to the drawings and in conjunction with exemplary embodiments. The soft pack battery air cell type chemical probe power connection mechanism of the present invention includes a row formed by aluminum plates 1 arranged parallel to each other with a gap therebetween, the aluminum plates 1 being perpendicular to the vertical axis of the row, an electric heating member 12 being provided on the aluminum plate 1, the surface of the aluminum plate 1 being covered with an insulating layer 11, and the space between two adjacent aluminum plates 1 forming a position for holding a battery, the vertical axis direction of the row is defined as the vertical direction, one of the vertical directions being the forward direction and the other being the rearward direction, the aluminum plate 1 is rectangular, the forward surface of the aluminum plate 1 is defined as the front surface, the rearward surface of the aluminum plate 1 is defined as the rear surface, the extension direction of one side of the aluminum plate 1 is defined as the left-right direction, and the extension direction of the other side is defined as the up-down direction,

[0035] One power connection device 2 is installed at each of the left and right ends of the aluminum plate 1, and the power connection devices 2 of adjacent aluminum plates 1 are aligned vertically. The power connection device 2 includes an upper slider 25 slidably installed on the upper side of the aluminum plate 1, a lower slider 26 slidably installed on the lower side of the aluminum plate 1, a first air cell unit 22a installed on the front side of the aluminum plate 1, and a second air cell unit 22b installed on the rear side of the aluminum plate 1, The direction of the power connection device 2 near the aluminum plate 1 is defined as the inside, and the opposite direction as the outside. A tab lead contact plate 21 is attached to the outside of the first air cell unit 22a, and an air cell pressure plate 23 is attached to the outside of the second air cell unit 22b. An upper slider 25 and a lower slider 26 are connected to the upper and lower ends of the tab lead contact plate 21, the first air cell unit 22a, the second air cell unit 22b, and the air cell pressure plate 23, respectively. An end of the aluminum plate 1 is inserted into a sleeve surrounded by the first air cell unit 22a, the second air cell unit 22b, the upper slider 25, and the lower slider 26. A reset mechanism 28 including a reset spring 282 is provided between the end of the tab lead contact plate 21 and the upper slider 25, the lower slider 26, and between the end of the air cell pressure plate 23 and the upper slider 25, the lower slider 26. The above-mentioned first air cell unit 22a includes a first air cell fixing plate 221, and a plurality of first air cells 222 are provided on the outside of the first air cell fixing plate 221, and the second air cell unit 22b includes a second air cell fixing plate 223, and a plurality of second air cells 224 are provided on the outside of the second air cell fixing plate 223, and the first air cells 222 and the second air cells 224 are both strip-shaped (long, thin pieces) and connected to an external air source, and the tab lead contact plate 21 is connected to an external power source by a current line 211 and a voltage line 212.

[0036] In some embodiments of the present invention, the number of the above-mentioned first air cells 222 and second air cells 224 is two, and the first air cells 222 are arranged in parallel along the longitudinal direction of the first air cell fixing plate 221, and the second air cells 224 are arranged in parallel along the longitudinal direction of the second air cell fixing plate 223.

[0037] In some embodiments of the present invention, the reset mechanism 28 includes a vertical hole provided on the upper slider 25 or the lower slider 26, a flat head screw 281 movable along the vertical direction of the hole is provided in the hole, the tail of the flat head screw 281 extends from the opening of the hole and is connected to a pin 283, a compression spring 282 is provided between the cap of the flat head screw 281 and the wall surface of the hole, and the compression spring 282 presses the cap of the flat head screw 281 against the bottom of the hole, among which, the cap of the pin 283 attached to the hole whose opening faces forward is hung on the outside of the tab reed contact plate 21, and the cap of the pin 283 attached to the hole whose opening faces backward is hung on the outside of the air cell pressure plate 23.

[0038] In some embodiments of the present invention, a cushion 24 is attached to the outer side of the air cell pressure plate 23 of the second air cell unit 22b.

[0039] In some embodiments of the present invention, the outer surface of the tab lead contact plate 21 is laterally provided with a current region 213, a voltage region 214 and a sunken region 215 extending along the longitudinal direction of the tab lead contact plate 21 in this order, an insulating gap is provided between the current region 213 and the voltage region 214, the current region 213 is connected to the current line 211, the voltage region 214 is connected to the voltage line 212, the surface of the current region 213 is flush with the surface of the voltage region 214, and the surface of the sunken region 215 is lower than the surface of the voltage region 214.

[0040] In some embodiments of the present invention, the first air cell 222 and the second air cell 224 are made of a flexible material such as TPU with a large elastic modulus and excellent heat resistance, so that the air cell deformation is more definite when high-pressure gas is injected. The first air cell 222 and the second air cell 224 are both air cell bags with a sealed upper end and an air permeable lower end, and the air injection height of the air cell bag can be adjusted according to the thickness of the battery to be inserted, thereby realizing the charging and discharging function of batteries of different models, and the compressible property of the air cell bag allows the air pressure to be applied even when the fixture is not full.

[0041] In some embodiments of the present invention, the two first air cells 222 share one first vent 225, and the first vent 225 extends downward to form a first connecting pipe 226, and the first vent 225 is a funnel-shaped contraction port with an apex angle α of 90°, which can prevent the first air cell 222 from bursting when inflating.

[0042] In some embodiments of the present invention, the two second air cells 224 share one second vent hole 227, and the second vent hole 227 extends downward to form a second connecting pipe 228, and the second vent hole 227 is a funnel-shaped contraction hole with an apex angle β of 90°, which can prevent the first air cell 222 from bursting when inflating the air.

[0043] In some other embodiments of the present invention, negative pressure equipment is used to extract air when the first air cell 222 and the second air cell 224 are vented, and the tab reed contact plate 21 and the reset pressure plate 23 are both bonded to an aluminum plate, thereby preventing deformation of the tab reed.

[0044] In some embodiments of the present invention, the cushion 24 is made of an electrically insulating and elastic material, such as a silica gel sheet, etc. The cushion 24 not only has an insulating effect, but also, when the air cell pressure plate and the battery tab lead are slightly misaligned when clamping the battery tab lead, the cushion 24 itself can be deformed to offset the effect, thereby preventing the deformation of the tab lead from affecting the battery quality and preventing poor chemical contact problems.

[0045] In some embodiments of the present invention, a magnetic attraction plate 13 for attracting an upper slider 25 is provided on the upper edge of the aluminum plate 1, a slide rail 14 is provided on the lower edge of the aluminum plate 1, and a lower slider 26 is slidably installed within the slide rail 14.

[0046] In some embodiments of the present invention, the top of the upper slider 25 is provided with a tip for guiding the battery into position, and a rectangular groove 251 is opened at the bottom, the upper edge of the aluminum plate 1 penetrates the rectangular groove 251, and the thickness of the aluminum plate 1 is consistent with the width of the rectangular groove 251, so that a back-and-forth swing occurs when the upper slider 25 slides over the upper edge of the aluminum plate 1. A slide groove 261 that slides into the slide rail 14 is provided at the top of the lower slider 26, the cross section of the slide groove 261 is inverted T-shaped, and the slide rail 14 penetrates the horizontal area of ​​the cross section of the slide groove 261.

[0047] In some embodiments of the present invention, the side block 27 is a separable U-shaped block, and the notch of the vertical through groove 271 of the side block is connected to the side of the upper slider 25 or the lower slider 26. In other embodiments of the present invention, the cross section of the vertical through groove 271 is rectangular.

[0048] In some embodiments of the present invention, the side block 27 includes an end block 272 and an upper support block 273 and a lower support block 274 arranged opposite to each other, and the end block 272 is connected to the end of the upper support block 273 or the lower support block 274 by a tenon connection manner, and they jointly surround a U-shaped vertical through-slot 271, and the notch of the vertical through-slot 271 is connected to the side of the upper slider 25 or the lower slider 26. In some other embodiments of the present invention, a number of vertical slide runners 275 are symmetrically installed on the upper and lower groove walls of the vertical through-slot 271, so that the entire power connection device 2 can be smoothly replaced.

[0049] In some embodiments of the present invention, a plurality of guide blocks 18 are provided at intervals on the upper side of the aluminum plate 1. The tops of the guide blocks 18 have guide tips for guiding the battery into the position, and the guide blocks 18 on the adjacent aluminum plates 1 in the front and rear can form a horn-mouth shaped guide area above the position that is larger at the top and smaller at the bottom, making it possible to smoothly insert the battery into the position.

[0050] In the hot press jig of the soft pack battery air cell type chemical probe power connection mechanism to which the present invention is applied, a side block 27 is provided on each side of the upper slider 25 and the lower slider 26, and a vertical through groove 271 is provided on the side block 27. A fixed block 16 is provided above the end of the aluminum plate 1, and an interlocking block 17 is provided below it. A vertical mounting hole 162 is provided on the fixed block 16, and a linear bearing 161 is provided in the vertical mounting hole 162. A guide shaft 4 is inserted through the linear bearings 161 aligned vertically, the aluminum plates 1 are connected in series in parallel on the guide shaft 4, the interlocking blocks 17 of adjacent aluminum plates 1 are connected to each other by interlocking members to realize interlocking between the aluminum plates 1, and a connecting shaft 5 is inserted through the vertical through grooves 271 of the power connection devices 2 aligned vertically, and the vertically aligned power connection devices 2 are connected in series on the corresponding connecting shafts 5.

[0051] In some embodiments of the present invention, a chemically-formed wire fixing member 15 for fixing an electric wire is provided at the center position of the lower side of the aluminum plate 1.

[0052] The working process of the present invention is as follows: 1) Align the tab leads 31 of the battery 3 with the power connection devices 2 in the vertical direction by adjusting the horizontal spacing of the two rows of power connection devices 2 based on the model number of the battery. 2) The battery 3 is vertically inserted into position using the guide block 18 and the upper slider 25 as a guide, and the spacing between the aluminum plates 1 is adjusted so that the battery 3 is clamped between the two aluminum plates 1 at the front and rear. 3) When air is introduced into the first air cell 222 and the second air cell 224, the air enters the first air cell 222 and the second air cell 224 and expands, causing the tab lead contact plate 21 and the air cell pressure plate 23 to protrude outward in the vertical direction, and the tab lead 31 of the battery 3 is clamped together by the tab lead contact plate 21 and the air cell pressure plate 23 on the adjacent aluminum plate 1 at the front. 4) The current line 211 and the voltage line 212 at the bottom of the tab lead contact plate 21 are connected to an external power supply box to perform a charge / discharge formation process for the power battery. 5) When the air is released from the first air cell 222 and the second air cell 224, the tab lead contact plate 21 and the air cell pressure plate 23 return to their initial positions by the action of the reset mechanism 28.

[0053] In step 3), the tab lead contact plate 21 is supported by two first air cells 222, and the air cell pressure plate 23 is supported by two second air cells 224, which corresponds to the tab lead contact plate 21 and the air cell pressure plate 23 being supported by a plurality of arches in the lateral direction, which helps to prevent lateral tilt and improve the stability and certainty of the spatial posture of the tab lead contact plate 21 and the air cell pressure plate 23, and effectively prevents lateral tilt from occurring when the tab lead contact plate 21 comes into contact with the tab lead 31 of the battery 3.

[0054] Another point to prevent the tab lead contact plate 21 from tilting is how to prevent the tab lead contact plate and the air cell pressure plate 23 from tilting in their own longitudinal direction. The tab lead contact plate 21 and the air cell pressure plate 23 are all provided with air cells in their central parts, and their ends are connected to the upper slider 25 and the lower slider 26. When the air cells expand, they are tilted between their ends and the central part, which must be prevented from affecting the spatial attitude of the tab lead contact plate 21 and the air cell pressure plate 23. A reset mechanism 28 is provided at the part where the ends of the tab lead contact plate 21 and the air cell pressure plate 23 are connected to the upper and lower sliders of the present invention. The reset mechanism 28 has elasticity, and allows the ends of the tab lead contact plate 21 and the air cell pressure plate 23 to move outward together with their central parts under the tensile force caused by the expansion of the air cells, thereby improving the flatness of the tab lead contact plate 21 and the air cell pressure plate 23 in their own longitudinal direction.

[0055] The above measures improve the stability and certainty of the spatial posture of the tab lead contact plate 21 and the air cell pressure plate 23, ensure that the voltage area 214 and the current area 213 of the tab lead contact plate 21 are simultaneously conductive with the tab lead 31 of the battery 3, and improve the reliability of the contact between the tab lead contact plate 21 and the battery tab lead 31.

[0056] In step 4), the cushion 24 also improves the reliability of the contact between the tab lead contact plate 21 and the battery tab lead 31. When clamping the battery tab lead 31, if the parallelism between the air cell pressure plate 23 and the battery tab lead 31 is slightly misaligned, the effect can be offset by the deformation of the cushion 24 itself.

[0057] In step 5), when the first air cell 222 and the second air cell 224 are deflated, the reset spring 282 of the reset mechanism 28 overcomes the residual deformation of the air cells and pulls the tab lead contact plate 21 and the air cell pressure plate 23 back to their initial positions, thereby accurately resetting the operating parts of the present invention and improving the stability of the position dimensions during the process of battery chemical grading.

[0058] As described above, although the embodiments of the present invention have been shown and described, the above embodiments are illustrative and should not be construed as limiting the present invention. It is understood that 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 power connection mechanism using a probe constituting a soft pack battery air cell type, comprising a row formed by aluminum plates (1) arranged parallel to each other with a gap therebetween, the aluminum plates (1) being perpendicular to a vertical axis of the row, an electric heating member (12) being provided on the aluminum plate (1), a surface of the aluminum plate (1) being covered with an insulating layer (11), positions for holding a battery being formed in a space between two adjacent aluminum plates (1), the vertical axis direction of the row being defined as a vertical direction, one vertical direction being defined as a forward direction and the other vertical direction being defined as a rearward direction, the aluminum plate (1) being rectangular, the forward surface of the aluminum plate (1) being defined as a front surface, the rearward surface of the aluminum plate (1) being defined as a rear surface, the extension direction of one side of the aluminum plate (1) being a left-right direction, and the extension direction of the other side being a top-bottom direction, One power connection device (2) is installed at each of the left and right ends of the aluminum plate (1), and the power connection devices (2) of adjacent aluminum plates (1) are aligned in the vertical direction; The power connection device (2) includes an upper slider (25) slidably installed on the upper side of the aluminum plate (1), a lower slider (26) slidably installed on the lower side of the aluminum plate (1), a first air cell unit (22a) installed on the front side of the aluminum plate (1), and a second air cell unit (22b) installed on the rear side of the aluminum plate (1); The direction of the power connection device (2) closer to the aluminum plate (1) is defined as the inside, and the opposite direction is defined as the outside. A tab lead contact plate (21) is attached to the outside of the first air cell unit (22a), and an air cell pressure plate (23) is attached to the outside of the second air cell unit (22b). An upper slider (25) and a lower slider (26) are connected to the upper and lower ends of the tab lead contact plate (21), the first air cell unit (22a), the second air cell unit (22b), and the air cell pressure plate (23), respectively. An end of the aluminum plate (1) is inserted into a sleeve surrounded by the first air cell unit (22a), the second air cell unit (22b), the upper slider (25), and the lower slider (26). A reset mechanism (28) including a reset spring (282) is provided between the end of the tab lead contact plate (21) and the upper slider (25) or the lower slider (26), and between the end of the air cell pressure plate (23) and the upper slider (25) or the lower slider (26). The reset mechanism (28) includes a vertical hole provided on the upper slider (25) or the lower slider (26), and a countersunk screw (281) movable along the vertical direction of the hole is provided in the hole. The tail of the countersunk screw (281) The portion extends from the mouth of the hole and is connected to a pin (283), a compression spring (282) is provided between the cap of the flat head screw (281) and the wall surface of the hole, and the compression spring (282) presses the cap of the flat head screw (281) against the bottom of the hole, the cap of the pin (283) attached to the hole whose mouth faces forward is hung on the outside of the tab lead contact plate (21), and the cap of the pin (283) attached to the hole whose mouth faces backward is hung on the outside of the air cell pressure plate (23), the first air cell unit (22a) includes a first air cell fixing plate (221), and a plurality of first air cells (222) are provided on the outer side of the first air cell fixing plate (221); the second air cell unit (22b) includes a second air cell fixing plate (223), and a plurality of second air cells (224) are provided on the outer side of the second air cell fixing plate (223); the first air cells (222) and the second air cells (224) are both strip-shaped and connected to an external air source; and the tab lead contact plate (21) is connected to an external power source by a current line (211) and a voltage line (212). Power connection mechanism with probes to configure soft pack battery air cell type.

2. 2. The power connection mechanism using a probe constituting a soft pack battery air cell type according to claim 1, characterized in that the number of the first air cells (222) and the second air cells (224) are each two, the first air cells (222) are installed in parallel along the longitudinal direction of the first air cell fixing plate (221), and the second air cells (224) are installed in parallel along the longitudinal direction of the second air cell fixing plate (223).

3. A power connection mechanism using a probe constituting a soft pack battery air cell type according to any one of claims 1 to 2, characterized in that a cushion (24) is attached to the outside of the air cell pressure plate (23) of the second air cell unit (22b).

4. 4. The power connection mechanism using a probe constituting a soft pack battery air cell type according to claim 3, characterized in that a current area (213), a voltage area (214) and a sunken area (215) are provided laterally in this order on an outer surface of the tab lead contact plate (21), extending along a longitudinal direction of the tab lead contact plate (21), an insulating gap is provided between the current area (213) and the voltage area (214), the current area (213) is connected to a current line (211), the voltage area (214) is connected to a voltage line (212), the surface of the current area (213) is flush with the surface of the voltage area (214), and the surface of the sunken area (215) is lower than the surface of the voltage area (214).

5. The power connection mechanism using a probe constituting a soft pack battery air cell type as described in claim 4, characterized in that the first air cell (222) and the second air cell (224) are made of a flexible material having a large elastic modulus and excellent heat resistance, and the cushion (24) is made of a material that is electrically insulating and elastic.

6. 6. A power connection mechanism using a probe constituting a soft pack battery air cell type as described in claim 5, characterized in that a magnetic attraction plate (13) for attracting an upper slider (25) is provided on the upper side of the aluminum plate (1), a slide rail (14) is provided on the lower side of the aluminum plate (1), and a lower slider (26) is slidably installed within the slide rail (14).

7. The power connection mechanism using a probe constituting a soft pack battery air cell type according to claim 6, characterized in that the top of the upper slider (25) is provided with a tip for guiding the battery to a position, a rectangular groove (251) is opened at the bottom, the upper side of the aluminum plate (1) passes through the rectangular groove (251) and the thickness of the aluminum plate (1) is consistent with the width of the rectangular groove (251), the top of the lower slider (26) is provided with a slide groove (261) that slides into the slide rail (14), the cross section of the slide groove (261) is an inverted T-shaped, and the slide rail (14) passes through the horizontal area of ​​the cross section of the slide groove (261).

8. The power connection mechanism using a probe constituting the soft pack battery air cell type as described in claim 7, characterized in that the side block (27) is a separable U-shaped block, and the notch of the vertical through groove (271) of the side block is connected to the side of the upper slider (25) or the lower slider (26).

9. In the hot press jig using the power connection mechanism by the probe constituting the soft pack battery air cell type according to claim 8, a side block (27) is provided on each side of the upper slider (25) and the lower slider (26), and a vertical through groove (271) is provided on the side block (27); A fixed block (16) is provided above the end of the aluminum plate (1), an interlocking block (17) is provided below, a vertical mounting hole (162) is provided on the fixed block (16), and a linear bearing (161) is provided in the vertical mounting hole (162). A guide shaft (4) is inserted through the linear bearing (161) aligned vertically, the aluminum plates (1) are connected in parallel in series on the guide shaft (4), the interlocking blocks (17) of adjacent aluminum plates (1) are connected to each other by an interlocking member to realize interlocking between the aluminum plates (1), the connection shaft (5) is inserted through the vertical through-groove (271) of the vertically aligned power connection device (2), and the vertically aligned power connection devices (2) are connected in series on the corresponding connection shaft (5). Hot press fixture.

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