A square case battery pack temperature control pressurization rapid curing system and method

Abstract

The present application relates to power battery packaging technical field, particularly to a kind of square cell package temperature control pressurization rapid curing system and method, the curing system includes transverse transfer mechanism, temperature control mechanism and pressurization mechanism, transverse transfer mechanism includes jacking mechanism and transverse mechanism, jacking mechanism realizes square cell package feeding and discharging, and square cell package is transversely moved to temperature control mechanism by transverse mechanism;Temperature control mechanism includes contact temperature control mechanism and air blowing temperature control mechanism;Contact temperature control mechanism includes temperature control table and heating plate, and heating plate is used to contact type heating for square cell package;Air blowing temperature control mechanism includes hot air circulation mechanism and air knife assembly, and air knife assembly is connected with hot air circulation mechanism through pipeline and is used to blow and heat for square cell package;Pressure mechanism is vertically downward to the electrode post of battery cell and pressurizes.This application can effectively solve the technical problems of poor glue curing uniformity, low curing efficiency and unstable product quality in the existing battery package glue curing process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power battery packaging, in particular to a square cell pack temperature control and pressurization rapid curing system and method. BACKGROUND

[0002] With the rapid development of the new energy vehicle industry, the production efficiency and product quality of power batteries, as core components, are directly related to the performance and safety of the whole vehicle. Among many power battery forms, square aluminum shell battery packs have become the mainstream choice in the market due to their high energy density, good structural strength, and high grouping efficiency.

[0003] Currently, in the packaging process of square battery packs, the battery module and the lower box shell are usually fixed by using the glue coating method. During the curing reaction process of the adhesive, volume expansion occurs, and when there is a lack of effective external pressure constraint, this expansion force will lift the battery module upwards, resulting in height differences between the poles of each cell at the top of the module and affecting the quality of the battery pack. The commonly used process in the industry is to pressurize and shape the battery pack after coating and completing the module into the box, and then transfer it to a large static warehouse for static curing after the adhesive is preliminarily cured. This process takes a very long time, usually several hours to several tens of hours. To meet the continuous production rhythm, enterprises must establish a large static warehouse area, which not only requires a large amount of land area, but also increases economic costs. Some battery pack heating and pressurizing equipment has already appeared in the industry, but most of the equipment uses traditional baking ovens or contact heating plates for heating, which has the problem of poor temperature uniformity, which may cause the adhesive to cure too quickly or too slowly in some local areas, affecting the overall performance of the adhesive. And the existing equipment also generally lacks an online quality detection link, which cannot instantly determine whether the pole height meets the requirements after pressurization and curing in the workstation. Therefore, it is necessary to design a workstation that integrates pressurization and shaping equipment and a static warehouse together to reduce economic costs and meet the demand for faster production rhythm. SUMMARY

[0004] The purpose of the present application is to provide a square cell pack temperature control and pressurization rapid curing system and method, which integrates AGV connection, pressurization, heating, and online measurement, has high automation degree, fast rhythm, and small occupation area, uses two heating modes of contact heating and blowing heating to ensure that the adhesive cures quickly and uniformly, guarantees the structural safety and electrical connection reliability of the battery pack, and can effectively solve the problems of poor adhesive curing uniformity, low curing efficiency, and unstable product quality in the adhesive curing process of the battery pack in the prior art.

[0005] In order to achieve the above technical purpose, the present application adopts the following technical scheme:

[0006] One of the technical solutions of the present application provides a square cell pack temperature control pressurization rapid curing system, comprising a transverse connection mechanism, a temperature control mechanism and a pressurization mechanism;

[0007] The transverse connection mechanism comprises a jacking mechanism and a transverse mechanism, the jacking mechanism is used for jacking the square cell pack to realize feeding and discharging, and the transverse mechanism is used for transversely moving the square cell pack to the temperature control mechanism.

[0008] The temperature control mechanism comprises a contact temperature control mechanism and a blowing temperature control mechanism; the contact temperature control mechanism comprises a temperature control table and a heating plate arranged on the upper surface of the temperature control table, and the heating plate is used for contact heating of the square cell pack placed thereon; the blowing temperature control mechanism comprises a hot air circulation mechanism and an air knife assembly arranged on the temperature control table, and the air knife assembly is connected with the hot air circulation mechanism through a pipeline and is used for blowing heating below the square cell pack.

[0009] The pressurization mechanism is used for vertically downward pressurization of the cell pole on the surface of the square cell pack.

[0010] In some possible implementation manners, the temperature control table comprises a contact temperature control area and a blowing temperature control area, a plurality of support blocks are arranged on the contact temperature control area, the surface of the support block is connected with a plurality of heating plates, and most of the flat parts of the square cell pack directly abut against the heating plates for contact heating; the air knife assembly is fixed to the blowing temperature control area, hot air is gathered into uniform strip-shaped air flow, and the air flow is accurately blown to the parts of the battery pack that need to be heated, thereby improving the uniformity and heating efficiency.

[0011] In some possible implementation manners, the hot air circulation mechanism comprises a hot air machine, an air outlet interface and an air return interface are arranged on the hot air machine, the air outlet interface and an air inlet end below the air knife assembly are connected with each other through an air inlet pipeline, a backflow air hole is arranged on the blowing temperature control area, and the backflow air hole and the air return interface are connected with each other through an air return pipeline; a heat insulation protective cover is arranged on the temperature control table in a fit mode, the blowing temperature control area is located in the interior of the heat insulation protective cover, and the upper end of the heat insulation protective cover abuts against the square cell pack. A hot air flow channel is formed between the heat insulation protective cover, the square cell pack and the temperature control table. When blowing heating is performed, the hot air generated by the hot air machine enters the blowing temperature control area through the air outlet interface, the air inlet pipeline and the air knife assembly in sequence, and the air return enters the hot air machine through the backflow air hole, the air return pipeline and the air return interface in sequence, so that hot air circulation and heat energy recovery are realized, and the square cell pack is stably blown and heated by the circulating hot air.

[0012] In some possible implementation manners, a wind blocking and air exhausting mechanism is further included, and the wind blocking and air exhausting mechanism comprises an axial flow fan, an air exhaust pipeline, a wind blocking assembly, a lifting support and a lifting driving member.

[0013] The air-blocking assembly includes an air-blocking cover and a sealing gasket fixed below the air-blocking cover. The sealing gasket is used to press on the top of the square battery pack. The axial flow fan is connected to the air-blocking cover through an exhaust pipe. The lifting bracket and the lifting drive are both fixedly connected to the temperature control platform. The output end of the lifting drive is fixedly connected to the air-blocking cover, and the two ends of the air-blocking cover are slidably connected to the lifting bracket.

[0014] When heating with air blowing, the leaking parts in the lower box that connect to the air blowing temperature control zone are sealed, and the air blowing temperature control zone is vented under negative pressure through an axial flow fan and exhaust duct, so that a negative pressure area is formed inside the air blocking component to prevent high temperature hot air from leaking out and damaging circuit components and to avoid scalding the surrounding operators.

[0015] In some possible implementations, a visual ranging mechanism is also included, which includes a support frame and several displacement sensors. Before and after the prismatic battery pack is heated and pressurized, the displacement sensors measure the height of the cell terminals. After determining that there are no NG conditions, the lateral transfer mechanism moves the battery pack to the transfer position. The AGV trolley lifts the prismatic battery pack off the pin and drives out of the work station.

[0016] In some possible implementations, the lifting mechanism is arranged in two opposing groups. Each group of lifting mechanisms includes a supporting vertical plate, a supporting top plate, a side push drive, a side push block, a lifting drive, and a lifting plate. A supporting vertical plate is slidably connected to each end of the supporting top plate. The side push drive and the lifting plate are both fixed to the supporting top plate. The output end of the side push drive is connected to the side push block, and the output end of the lifting drive is connected to the lifting plate.

[0017] When the backpack-type AGV carrying the square battery pack enters the docking position, the side push drive component in the lifting mechanism located on both sides of the square battery pack drives the side push plug to extend from both sides of the square battery pack under the side beams of the square battery pack. At the same time, the lifting drive component drives the lifting plate to move upward, which in turn drives the supporting top plate and the square battery pack connected by the side push plug to move upward as a whole to detach from the AGV.

[0018] In some possible implementations, the lateral movement mechanism includes a supporting base plate, a lateral movement drive unit fixed to the supporting base plate, a lateral movement rack, and a track plate. The output end of the lateral movement drive unit is connected to a gear, which meshes with the lateral movement rack. The lateral movement rack is parallel to and fixedly connected to the track plate. The supporting base plate and the track plate are slidably connected by a third guide rail slider group.

[0019] After the lifting mechanism lifts the square battery pack off the AGV, it is driven by the lateral drive component and, through the meshing of gears and lateral racks, moves along the track plate to the temperature control platform to await heating and pressurization. After heating and pressurization are completed, the lifting mechanism lifts the square battery pack off the temperature control platform again, and at the same time, the lateral mechanism moves the square battery pack out of the heating and pressurization area, so that the visual ranging mechanism can measure the height of the pole.

[0020] In some possible implementations, the pressurizing mechanism includes a pressurizing frame and a pressurizing assembly disposed on top of the pressurizing frame. The pressurizing assembly includes a frame, a pressing drive, a balancing drive, and an electrode plate. Both ends of the frame are connected to the pressurizing frame, and a fixed base plate is fixed in the middle of the frame. The pressing drive and the balancing drive are both fixed on the fixed base plate. The output end of the pressing drive passes through the bottom of the fixed base plate and is connected to the electrode plate. A movable frame is fixed above the electrode plate, and the top of the movable frame is connected to the output end of the balancing drive.

[0021] When pressurizing the square battery pack, the downward driving component drives the terminal plate to move downward and press against the terminal surface of the square battery pack. At the same time, the balancing driving component applies pressure to the movable frame in the opposite direction. This can effectively compensate for the deformation caused by the expansion of the colloid during the heating and pressurization process, which makes the terminal plate susceptible to pressure. This ensures that the terminal plate applies pressure evenly to the cell terminals on the entire plane, thereby achieving high-precision pressure control.

[0022] This invention also provides a method for rapid curing of a prismatic battery pack under controlled temperature and pressure, implemented using any of the above-mentioned technical solutions in a rapid curing system for prismatic battery packs under controlled temperature and pressure, comprising the following steps:

[0023] S1: Apply adhesive between the battery module and the lower housing. The backpack AGV trolley carrying the square battery pack with the adhesive applied and waiting to be cured enters the docking position.

[0024] S2: The transverse transfer mechanism lifts and moves the square battery pack to the heating and pressurizing area, and the square battery pack is fixed to the temperature control table;

[0025] S3: The temperature control mechanism uses contact heating and air blowing to heat the square battery pack to accelerate the curing of the colloid, eliminating the step of static curing, saving floor space and economic costs. The air blocking and exhaust mechanism seals the air leakage parts in the lower box and performs negative pressure exhaust in the air blowing temperature control area to prevent hot air leakage from causing equipment and personnel casualties.

[0026] S4: The pressurizing mechanism presses onto the surface of the terminal post of the square battery pack and maintains pressure to prevent the height of the cell terminal post from changing during the curing process of the adhesive.

[0027] S5: After curing, the temperature control mechanism and the pressurization mechanism are reset, and the transverse transfer mechanism lifts the square battery pack and moves it to the transfer position. The AGV trolley then loads the square battery pack out of the station.

[0028] In some possible implementations, in step S2, after the transverse transfer mechanism lifts the square battery pack off the AGV, before entering the heating and pressurizing area, the visual ranging mechanism measures and records the height of each pole on the surface of the square battery pack.

[0029] In step S5, after curing is completed, the transverse connection mechanism moves the square battery pack to the connection position, and the visual ranging mechanism measures and records the height of each pole on the surface of the square battery pack again to determine whether the product is qualified.

[0030] In step S4, the pressurizing mechanism presses down in two stages:

[0031] First stage: The downward stroke of the pole plate should not be less than 300mm, and the speed should be controlled at 40mm / s;

[0032] Second stage: When the distance between the electrode pressure plate and the electrode surface does not exceed 10mm, the electrode pressure plate is pressed down at a speed of 5mm / s, and the speed is controlled at 5mm / s.

[0033] Third stage: After the electrode plate contacts the electrode, the pressing speed is reduced to 0.5mm / s, the pressing stroke is controlled within 1mm, and the pressure is maintained until curing is completed.

[0034] The present invention has the following beneficial effects:

[0035] (1) The present invention achieves dual-mode heating by setting a contact temperature control mechanism and a blower temperature control mechanism in combination. The contact temperature control mechanism contacts the regular surface of the lower box of the battery pack for heat conduction heating, which has high thermal efficiency and fast temperature rise. The blower temperature control mechanism heats the parts of the battery pack that are complex in shape, have obstructions, or require large-area uniform heating with hot air, which can cover areas that are difficult to reach by contact heating, thereby improving the uniformity of battery pack heating and improving heating efficiency.

[0036] (2) The blowing temperature control mechanism of the present invention can realize hot air circulation, reduce energy waste, save energy and protect the environment. At the same time, it can form a negative pressure environment in conjunction with the air blocking and exhaust mechanism, which can effectively prevent high temperature hot air from leaking out, avoid damaging the surrounding electrical components and affecting the working environment, and at the same time help to concentrate heat and reduce energy consumption.

[0037] (3) By setting up a pressurizing mechanism in conjunction with dual-mode heating, the present invention can achieve segmented pressurization, apply controllable and uniform pressure to the battery cell posts, constrain their expansion, ensure that all posts maintain a consistent height after curing, and prevent connection problems or product scrap due to height differences.

[0038] (4) By setting up a visual ranging mechanism, the present invention can perform non-contact measurement of the height of the battery cell poles before and after heating and pressurization, thereby realizing online quality detection.

[0039] (5) The square battery pack provided by the present invention can realize functions such as automatic material connection, dual-mode heating, segmented pressurization, and electrode height measurement feedback. It has a high degree of automation, fast cycle time, and small footprint. It replaces the traditional static storage chamber, which can significantly shorten the gel curing time, shorten the production cycle, and improve production efficiency. It is suitable for the production and manufacturing of various square battery packs, especially for the large-scale production of power batteries for new energy vehicles, and has good industrial application prospects. Attached Figure Description

[0040] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0041] Figure 1 This is a three-dimensional structural diagram of the temperature-controlled and pressure-pressurized rapid curing system for the square-shell battery pack of the present invention;

[0042] Figure 2 This is a schematic diagram of the internal battery pack, temperature control mechanism, and air blocking and exhaust mechanism of the present invention;

[0043] Figure 3 This is a schematic diagram of the temperature control mechanism and the air blocking and exhaust mechanism in this invention;

[0044] Figure 4 This is a schematic diagram of the connection structure between the partially cut air knife assembly and the air blocking and exhaust mechanism in this invention;

[0045] Figure 5 This is a schematic diagram of the connection structure between the air blocking and exhaust mechanism and the temperature control table in this invention;

[0046] Figure 6 This is a three-dimensional structural diagram of the air blocking and exhaust mechanism in this invention;

[0047] Figure 7 This is a three-dimensional structural diagram of the transverse connecting mechanism and the visual ranging mechanism in this invention;

[0048] Figure 8 This is a three-dimensional structural diagram of the lifting mechanism in this invention;

[0049] Figure 9 This is a three-dimensional structural diagram of the pressurizing mechanism in this invention;

[0050] Figure 10 This is a three-dimensional structural diagram of the press-fit assembly in this invention;

[0051] Figure 11This is a process flow diagram of the temperature-controlled and pressure-controlled rapid curing method for the square-shell battery pack of the present invention.

[0052] Explanation of the labels in the diagram:

[0053] 100. Square-shell battery pack; 101. Side beam; 200. AGV trolley;

[0054] 1. Lateral transfer connection mechanism;

[0055] 11. Lifting mechanism; 111. Supporting vertical plate; 112. Supporting top plate; 113. Side push drive component; 114. Side push insert block; 1141. Insert ruler fixing plate; 115. Lifting drive component; 116. Lifting plate; 117. First guide rail slider assembly; 118. Second guide rail slider assembly; 119. Pin drive component; 120. Limiting pin;

[0056] 12. Lateral movement mechanism; 121. Support base plate; 122. Lateral movement drive component; 123. Lateral movement rack; 124. Track plate; 125. Third guide rail slider assembly; 126. Hydraulic damper;

[0057] 2. Temperature control mechanism;

[0058] 21. Contact temperature control mechanism; 211. Temperature control table; 212. Heating plate; 213. Support block; 214. Temperature sensor; 215. Positioning pin;

[0059] 22. Air blowing temperature control mechanism; 221. Hot air circulation mechanism; 2211. Hot air blower; 2212. Air outlet; 2213. Return air outlet; 2214. Air inlet duct; 2215. Return air duct; 2216. Return air vent; 222. Air knife assembly; 223. Heat insulation protective cover;

[0060] 23. Contact-type temperature control area; 24. Air-blowing type temperature control area;

[0061] 3. Pressing mechanism; 31. Pressing frame; 32. Pressing assembly; 320. Magnetic scale; 321. Frame; 322. Downward pressing drive; 323. Balancing drive; 324. Pole post pressure plate; 325. Fixed base plate; 326. Movable frame; 327. Fourth guide rail slider assembly; 328. Avoidance drive; 329. Guide rack;

[0062] 4. Visual ranging mechanism; 41. Support frame; 42. Displacement sensor;

[0063] 5. Air blocking and exhaust mechanism; 51. Axial flow fan; 52. Exhaust duct; 53. Air blocking assembly; 531. Air blocking cover; 532. Sealing gasket; 54. Lifting bracket; 55. Lifting drive component; 56. Fifth guide rail slider group; 57. Locking mechanism. Detailed Implementation

[0064] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Although the description of the present invention will be presented in conjunction with preferred embodiments, this does not mean that the features of the invention are limited to these embodiments. To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0065] refer to Figure 1 and Figure 2 One embodiment of the present invention provides a temperature-controlled and pressure-pressurized rapid curing system for a prismatic battery pack, including a transverse connection mechanism 1, a temperature control mechanism 2, and a pressurization mechanism 3. The transverse connection mechanism 1 includes a lifting mechanism 11 and two sets of transverse mechanisms 12 arranged opposite to each other on both sides of the prismatic battery pack 100. The lifting mechanism 11 is used to lift the prismatic battery pack 100 for loading and unloading, and the transverse mechanism 12 is used to transversely move the prismatic battery pack 100 to the temperature control mechanism 2. The temperature control mechanism 2 includes a contact temperature control mechanism 21 and a blowing temperature control mechanism 22. (Reference) Figure 2 and Figure 3 The contact temperature control mechanism 21 includes a temperature control platform 211 and a heating plate 212 disposed on the upper surface of the temperature control platform 211. The heating plate 212 is used to perform contact heating on the square battery pack 100 placed on it. (Reference) Figures 1 to 3 The blowing temperature control mechanism 22 includes a hot air circulation mechanism 221 and an air knife assembly 222 mounted on the temperature control platform 211. The air knife assembly 222 is connected to the hot air circulation mechanism 221 via a pipe and is used to blow air to heat the area below the square battery pack 100. The pressurizing mechanism 3 is used to apply vertical downward pressure to the cell terminals on the surface of the square battery pack 100.

[0066] This embodiment employs a dual-mode heating system. The contact temperature control mechanism directly contacts the battery pack for heat conduction heating, resulting in high thermal efficiency and rapid temperature rise. Simultaneously, a blower temperature control mechanism blows hot air to cover areas difficult to reach with contact heating, improving the uniformity and efficiency of battery pack heating. During heating, a pressurization mechanism applies controllable and uniform pressure to the cell terminals, ensuring that the terminals remain highly consistent before and after curing, thus improving product quality.

[0067] refer to Figure 7 and Figure 8In this embodiment, a set of lifting mechanisms 11 are respectively arranged on both sides of the square battery pack 100. Each set of lifting mechanisms 11 includes a supporting vertical plate 111, a supporting top plate 112, a side-push drive component 113, several side-push blocks 114, a lifting drive component 115, and a lifting plate 116. The two ends of the supporting top plate 112 are slidably connected to a supporting vertical plate 111 through a set of first guide rail slider groups 117. The side-push drive component 113 can be a cylinder, electric cylinder, or hydraulic cylinder, preferably a cylinder. The side-push drive component 113 and the lifting plate 116 are both fixed on the supporting top plate 112. One or more sets of side-push drive components 113 can be provided, preferably two sets. The extension and retraction direction of the output end of the side-push drive component 113 is perpendicular to the length direction of the supporting top plate 112. The output end of the side-push drive 113 is connected to the side-push plug 114, which is slidably connected to the support top plate 112 via the second guide rail slider group 118. The side-push plug 114 and the second guide rail slider group 118 can also be connected by a ruler fixing plate 1141. Multiple sets of side-push plugs 114 extend from the side of the ruler fixing plate 1141 near the square battery pack 100. One or more sets of the second guide rail slider group 118 can be provided to improve the flexibility and stability of the sliding process. The output end of the lifting drive 115 is connected to the lifting plate 116. A support base plate 121 is connected to the bottom of the support vertical plate 111. The support base plate 121 is vertically provided with the lifting drive 115. One or more sets of the lifting drive 115 are provided, preferably two sets. The number and position of the lifting plates 116 correspond to the lifting drive 115.

[0068] When the backpack-type AGV trolley 200 carrying the square battery pack 100 enters the docking position, the side push drive component 113 in the lifting mechanism 11 located on both sides of the square battery pack 100 drives the side push plug 114 to extend from both sides of the square battery pack 100 into the side beam 101 below the square battery pack 100. At the same time, the lifting drive component 115 drives the lifting plate 116 to move upward, which in turn drives the supporting top plate 112 and the square battery pack 100 connected by the side push plug 114 to move upward as a whole to detach from the AGV trolley 200.

[0069] refer to Figure 7In this embodiment, the lateral movement mechanism 12 includes a supporting base plate 121, a lateral movement drive component 122 fixed on the supporting base plate 121, a lateral movement rack 123, and a track plate 124. The lateral movement drive component 122 can be a pneumatic cylinder, an electric cylinder, or a hydraulic cylinder, preferably a servo motor. The output end of the lateral movement drive component 122 is connected to a gear, which meshes with the lateral movement rack 123. The lifting mechanism 11 is mounted on the supporting base plate 121, and the supporting vertical plate 111 is fixedly connected to the supporting base plate 121. The lateral movement rack 123 and the track plate 124 are parallel and fixedly connected, and the supporting base plate 121 and the track plate 124 are slidably connected by a third guide rail slider assembly 125. After the lifting mechanism 11 lifts the square battery pack 100 away from the AGV trolley 200, under the drive of the transverse drive component 122, through the meshing transmission of gears and transverse racks 123, the transverse mechanism 12 carries the square battery pack 100 along the track plate 124 to the temperature control platform 211 to wait for heating and pressurization; after the heating and pressurization is completed, the lifting mechanism 11 lifts the square battery pack 100 away from the temperature control platform 211, and at the same time, the transverse mechanism 12 moves the square battery pack 100 out of the heating and pressurization area, so that the visual ranging mechanism 4 can measure the height of the pole.

[0070] refer to Figure 3 and Figure 4 In this embodiment, the temperature control platform 211 includes a contact temperature control zone 23 and a blowing temperature control zone 24. An air knife assembly 222 is fixed to the blowing temperature control zone 24. The contact temperature control zone 23 has several support blocks 213, and several heating plates 212 are connected to the surfaces of the support blocks 213. Temperature sensors 214 are also connected to the heating plates 212. The temperature sensors 214 can be thermocouples, resistance temperature detectors (RTDs), or thermistors, and are used to monitor the temperature of the contact heating zone in real time. The temperature control platform 211 is located between two track plates 124. The transverse transfer connecting mechanism 1 moves the square battery pack 100 transversely along the track plates 124 to the temperature control platform 211 for unloading. (Reference) Figure 2 and Figure 3 The temperature control platform 211 is provided with a vertical positioning pin 215. When the transverse mechanism 12 moves the square battery pack 100 to the temperature control platform 211, the positioning pin 215 is inserted into the limiting hole in the side beam 101 to limit and lock it.

[0071] refer to Figures 2 to 5In this embodiment, the hot air circulation mechanism 221 includes a hot air blower 2211. The hot air blower 2211 is provided with an air outlet 2212 and a return air outlet 2213. The air outlet 2212 is connected to the air inlet below the air knife assembly 222 through an air inlet pipe 2214. The blower-type temperature control zone 24 is provided with a return air hole 2216, which is connected to the return air outlet 2213 through a return air pipe 2215. A heat insulation protective cover 223 is attached to the temperature control platform 211. The blower-type temperature control zone 24 is located inside the heat insulation protective cover 223, and the upper end of the heat insulation protective cover 223 abuts against the square battery pack 100. A hot air flow channel is formed between the heat insulation protective cover 223, the square battery pack 100, and the temperature control platform 211. The hot air blower 2211 provides a heat source through a heating wire and monitors the temperature in real time through an infrared thermometer. When blowing heat, the hot air generated by the hot air blower 2211 enters the blowing temperature control zone 24 through the air outlet 2212, the air inlet duct 2214 and the air knife assembly 222 in sequence. The return air returns to the hot air blower 2211 through the return air hole 2216, the return air duct 2215 and the return air interface 2213 in sequence, thereby realizing hot air circulation and heat energy recovery. The circulating hot air provides stable blowing heat to the square battery pack 100.

[0072] In this embodiment, the air knife assembly 222 includes multiple integrated quick-change air knives, each air knife being individually connected to an air inlet pipe 2214. The connection between the air knife assembly 222 and the temperature control platform 211 is equipped with a high-temperature resistant sealing ring or silicone gasket to improve the connection seal. The invention allows for adjustment of the air knife length according to actual heating requirements; it can be configured with a single long air knife assembly or multiple short air knife assemblies spaced apart. The air knife assembly 222 can be positioned below the high-voltage chamber of the square battery pack 100, below the reinforcing ribs in the lower housing of the square battery pack 100, or at a location in the lower housing that is not in contact with the heating plate 212. This provides supplementary heating to areas where contact heating has failed to adequately heat the battery pack 100, thereby improving the uniformity and efficiency of heating the square battery pack 100 and accelerating the curing of the colloid.

[0073] refer to Figure 9 and Figure 10In this embodiment, the pressurizing mechanism 3 includes a pressurizing frame 31 and a pressurizing assembly 32 disposed on the top of the pressurizing frame 31. The pressurizing assembly 32 includes a frame 321, a pressing drive 322, a balancing drive 323, and a pole plate 324. The two ends of the frame 321 are connected to the pressurizing frame 31, and a fixed base plate 325 is fixed in the middle of the frame 321. The pressing drive 322 and the balancing drive 323 are both fixed on the fixed base plate 325. The output end of the pressing drive 322 passes through the bottom of the fixed base plate 325 and is connected to the pole plate 324. A movable frame 326 is fixed above the pole plate 324, and the top end of the movable frame 326 is connected to the output end of the balancing drive 323. When pressurizing the square battery pack 100, the downward driving component 322 drives the terminal plate 324 to move downward and press against the terminal surface of the square battery pack 100. At the same time, the balancing driving component 323 applies pressure to the movable frame 326 in the opposite direction. This can effectively compensate for the deformation of the terminal plate 324 caused by the expansion of the colloid during the heating and pressurization process, which is easily subjected to pressure. This ensures that the terminal plate 324 applies pressure evenly to the battery cell terminal on the entire plane, thereby achieving high-precision pressure control.

[0074] In this embodiment, both the balancing drive 323 and the pressing drive 322 can be driven by cylinders, electric cylinders, or hydraulic cylinders. The balancing drive 323 is preferably a cylinder, and the pressing drive 322 is preferably a servo motor. In each pressing assembly 32, a set of balancing drive 323 can be symmetrically arranged on both sides of the pressing drive 322 to balance the stability of the pressing drive 322 driving the pole plate 324 to rise and fall.

[0075] Further, refer to Figure 1 and Figure 7 In other embodiments of the present invention, the temperature-controlled pressurization rapid curing system for the prismatic battery pack further includes a visual ranging mechanism 4, used to measure and compare the height of the cell terminals before and after heating and pressurizing the prismatic battery pack 100. The visual ranging mechanism 4 includes a support frame 41 and several displacement sensors 42. The support frame 41 is located above the track plate 124, and the displacement sensors 42 are fixed to the upper part of the support frame 41 to measure the height of the cell terminals of the prismatic battery pack 100 after being lifted and connected by the transverse transfer connection mechanism 1. By comparing the height of the cell terminals before and after heating and pressurization, and after determining that there are no NG conditions, the transverse transfer connection mechanism 1 transfers it to the connection position, and the AGV trolley lifts the prismatic battery pack 100 to detach it from the pin and drives out of the workstation.

[0076] Further, refer to Figure 2 , Figure 4 and Figure 6In other embodiments of the present invention, the temperature-controlled pressurized rapid curing system for the prismatic battery pack further includes an air-blocking and exhaust mechanism 5. The air-blocking and exhaust mechanism 5 includes an axial flow fan 51, an exhaust duct 52, an air-blocking component 53, a lifting bracket 54, and a lifting drive component 55. The lifting drive component 55 can be a cylinder, electric cylinder, or hydraulic cylinder, preferably a cylinder. The air-blocking component 53 includes an air-blocking cover 531 and a sealing gasket 532 fixed below the air-blocking cover 531. The sealing gasket 532 is used to press against the air leakage hole in the lower casing of the prismatic battery pack 100. The axial flow fan 51 is connected to the air-blocking cover 531 through the exhaust duct 52. One or more axial flow fans 51 can be provided, adjusted according to airflow requirements; in this embodiment, two sets are arranged in parallel. Both the lifting bracket 54 and the lifting drive component 55 are fixedly connected to the temperature control platform 211. The output end of the lifting drive component 55 is fixedly connected to the air blockage cover 531, and both ends of the air blockage cover 531 are slidably connected to the lifting bracket 54. A fifth guide rail slider group 56 is vertically installed on the lifting bracket 54, and both ends of the air blockage cover 531 are respectively connected to the fifth guide rail slider group 56, thereby ensuring that the lifting drive component 55 drives the air blockage component 53 to move up and down smoothly along the lifting bracket 54. The sealing gasket 532 and the exhaust duct 52 are both made of high-temperature resistant flexible materials, such as silicone and rubber. The exhaust duct 52 relies on its own flexibility to accommodate the lifting and lowering of the air blockage component 53. When heating with air blowing, the leaking part in the lower box that connects to the air blowing temperature control zone 24 is sealed, and the air blowing temperature control zone 24 is vented under negative pressure by the axial flow fan 51 and the exhaust pipe 52, so that a negative pressure area is formed in the air blocking component 53 to prevent high temperature hot air from leaking out and damaging circuit components and to avoid scalding the surrounding operators.

[0077] Further, refer to Figure 7 and Figure 8 In other embodiments of this application, a vertically arranged pin drive component 119 is also fixed on the supporting top plate 112, and the output end of the pin drive component 119 is fixedly connected to a limiting pin 120. The pin drive component 119 can be a driving component such as a cylinder, electric cylinder, or hydraulic cylinder, preferably a cylinder. The pin drive component 119 drives the limiting pin 120 upward to insert into the limiting hole in the side beam 101 for limiting and locking. A hydraulic buffer 126 is also provided between the supporting vertical plate 111 and the supporting top plate 112 to buffer the movement of the supporting top plate 112 up and down during the lifting drive component 115, ensuring the stability of the lifting process.

[0078] Further, refer to Figure 9 and Figure 10In other embodiments of this application, one or more pressing components 32 can be provided, which can be freely selected according to the battery pack size and pressing area. Both ends of the frame 321 of each pressing component 32 are slidably connected to the pressing frame 31 through the fourth guide rail slider group 327. At the same time, at least one pressing component 32 has an avoidance drive member 328 fixed at its end. The avoidance drive member 328 can be a cylinder or an electric cylinder. If only one pressing component 32 is equipped with the avoidance drive member 328, the pressing components 32 are connected to form a linkage. The upper side of the pressing frame 31 is provided with a guide rack 329. The guide rack 329 is parallel to the length direction of the guide rail in the fourth guide rail slider group 327. The output end of the avoidance drive 328 is connected to a gear, which meshes with the guide rack 329 through the installation gear. In this way, under the drive of the avoidance drive 328, the pressing assembly 32 can move along the direction of the guide rack 329, thereby realizing the horizontal position adjustment of the pressing assembly 32 to align with the square battery pack below and press it downward. It can also be used to move the pressing assembly 32 laterally to avoid the electrode plate 324 when it is changed, so as to avoid accidental falling and damaging the temperature control platform below.

[0079] Further, refer to Figure 9 and Figure 10 In other embodiments of this application, a magnetic scale 320 is also provided on the frame 321 near the movable frame 326, which can provide real-time feedback on the position of the movable frame 326. In conjunction with the pressing drive 322 and the balancing drive 323, it can achieve precise segmented control of the pressing position of the pole plate 324.

[0080] Further, refer to Figure 3 and Figure 5 In other embodiments of this application, the temperature control platform 211 is also provided with a locking mechanism 57. The locking mechanism 57 can be a cylinder or an electric cylinder. When the air blocking component 53 is pressed down on the surface of the square battery pack 100, the movable end of the locking mechanism 57 extends out and is inserted into the hole on the air blocking cover 531 for limiting, so as to ensure that the air blocking component 53 and the square battery pack 100 are tightly fitted, and to ensure the stability of the negative pressure exhaust.

[0081] The first guide rail slider group 117, the second guide rail slider group 118, the third guide rail slider group 125, the fourth guide rail slider group 327, and the fifth guide rail slider group 56 mentioned in this invention are all traditional linear guide rail sliding connection mechanisms of one or more groups of sliders, which will not be described in detail here.

[0082] For prismatic battery packs with different shapes and electrode distributions, the heating and pressurizing mechanism of this invention can be changed to different models of blueprints, supporting accelerated curing of different prismatic battery packs through heating and pressurizing. In the contact temperature control mechanism 21, the contact temperature control area 23 and the blowing temperature control area 24 on the temperature control table 211 are independently set. Two lifting backpack AGVs can carry the changing tray to the heating area to change the contact heating module in the contact temperature control area 23 as a whole. In the blowing temperature control mechanism 22, the model switching between different blueprints can be achieved by adjusting the blowing angle and height of the air knife assembly 222. In the pressurizing mechanism 3, two lifting backpack AGVs can perform rapid changing. First, the avoidance drive 328 drives the pressing assembly 32 to move laterally to a non-interference position. Then, the downward drive 322 drives the electrode plate 324 to descend to the changing position. The AGV carries the changing tray to the changing position and then lifts it to quickly change the electrode plate 324.

[0083] refer to Figure 11 In another embodiment of the present invention, a method for rapid curing of a prismatic battery pack under controlled temperature and pressure is provided, which is implemented using the rapid curing system described in any of the above embodiments, and specifically includes the following steps:

[0084] S1: Apply adhesive between the battery module and the lower housing. The backpack AGV trolley 200, carrying the square battery pack 100 with adhesive to be cured, enters the docking position.

[0085] S2: The transverse transfer connecting mechanism 1 lifts the square battery pack 100 and moves it transversely to the heating and pressurizing area, and the square battery pack 100 is fixed to the temperature control table 211;

[0086] S3: The temperature control mechanism 2 uses the heating plate 212, the hot air blower 2211, and the air knife assembly 222 to perform contact heating and air blowing heating on the square battery pack 100, respectively, and controls the temperature of the contact temperature control zone 23 and the air blowing temperature control zone 24 to 160-200℃ to accelerate the curing of the colloid, eliminate the step of static curing, save floor space and economic costs. The air blocking and exhaust mechanism seals the air leakage parts in the lower box and performs negative pressure exhaust in the air blowing temperature control zone to prevent hot air leakage from causing equipment and personnel casualties.

[0087] S4: The pressurizing mechanism 3 presses on the surface of the terminal post of the square battery pack 100 and maintains pressure to prevent the height of the cell terminal post from changing during the curing process of the adhesive.

[0088] S5: After curing is completed, the temperature control mechanism 2 and the pressurization mechanism 3 are reset, and the transverse transfer connection mechanism 1 lifts the square battery pack 100 and moves it to the connection position. The AGV trolley 200 loads the square battery pack and leaves the station.

[0089] Furthermore, in other embodiments of the present invention, in step S2 above, after the transverse transfer mechanism 1 lifts the square battery pack 100 away from the AGV trolley 200, before entering the heating and pressurizing area, the height of each pole on the surface of the square battery pack is measured and recorded by the visual ranging mechanism 4.

[0090] In step S5 above, after curing is completed, the transverse connection mechanism 1 moves the square battery pack 100 to the connection position, and the visual distance measuring mechanism 4 measures and records the height of each pole on the surface of the square battery pack to determine whether the product is qualified.

[0091] In step S4 above, the pressurizing mechanism presses down in three stages:

[0092] First stage: The downward stroke of the 324 pole plate should not be less than 300mm, and the speed should be controlled at 40mm / s;

[0093] Second stage: When the distance between the terminal plate 324 and the surface of the terminal of the square battery pack 100 does not exceed 10mm, the terminal plate 324 reduces the speed to 5mm / s and presses down, with the speed controlled at 5mm / s.

[0094] Third stage: After the electrode plate 324 contacts the electrode, the pressing speed is reduced to 0.5mm / s, the pressing stroke is controlled within 1mm, and the pressure is maintained until curing is completed.

[0095] The present invention also employs a PLC control system to integrate and control the transverse connection mechanism 1, the temperature control mechanism 2, the pressurization mechanism 3, the visual ranging mechanism 4, and the air blocking and exhaust mechanism 5, thereby realizing the full-process automated control of automatic connection, visual ranging feedback, temperature monitoring, segmented pressurization control, and negative pressure exhaust to prevent leakage.

[0096] Although the preferred embodiments of the present invention have been disclosed above, they are not intended to limit the present invention. Any person skilled in the art can make possible changes and modifications to the technical solutions of the present invention by utilizing the methods and techniques disclosed above without departing from the spirit and scope of the present invention. Therefore, any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solutions of the present invention shall fall within the protection scope of the technical solutions of the present invention.

Claims

1. A temperature-controlled and pressure-pressurized rapid curing system for a square-shell battery pack, characterized in that, It includes a transverse connection mechanism (1), a temperature control mechanism (2), a pressurization mechanism (3), a visual ranging mechanism (4), and a wind blocking and exhaust mechanism (5); The transverse transfer mechanism (1) includes a lifting mechanism (11) and a transverse transfer mechanism (12). The lifting mechanism (11) is used to lift the square battery pack (100) to realize loading and unloading, and the transverse transfer mechanism (12) is used to move the square battery pack (100) to the temperature control mechanism (2). The temperature control mechanism (2) includes a contact temperature control mechanism (21) and a blowing temperature control mechanism (22); the contact temperature control mechanism (21) includes a temperature control platform (211) and a heating plate (212) disposed on the upper surface of the temperature control platform (211), the heating plate (212) is used to perform contact heating on the square battery pack (100) placed on it; the blowing temperature control mechanism (22) includes a hot air circulation mechanism (221) and an air knife assembly (222) disposed on the temperature control platform (211), the air knife assembly (222) is connected to the hot air circulation mechanism (221) through a pipe, and is used to perform blowing heating below the square battery pack (100); The temperature control platform (211) includes a contact temperature control area (23) and a blowing temperature control area (24). The contact temperature control area (23) is provided with several support blocks (213). Several heating plates (212) are connected to the surface of the support blocks (213). The air knife assembly (222) is fixed to the blowing temperature control area (24). The pressurizing mechanism (3) is used to apply vertical downward pressure to the cell terminals on the surface of the square battery pack (100); the pressurizing mechanism (3) includes a pressing frame (31) and a pressing assembly (32) located on top of the pressing frame (31). The pressing assembly (32) includes a frame (321), a downward pressing drive (322), a balancing drive (323), and a terminal pressure plate (324). Both ends of the frame (321) are connected to the pressing frame (31). A fixed base plate (325) is fixed in the middle of the frame (321). The pressing drive (322) and the balancing drive (323) are both fixed on the fixed base plate (325). The output end of the pressing drive (322) passes through the bottom of the fixed base plate (325) and is connected to the pole plate (324). A movable frame (326) is fixed above the pole plate (324). The top of the movable frame (326) is connected to the output end of the balancing drive (323). The visual ranging mechanism (4) includes a support frame (41) and several displacement sensors (42). Before and after the square battery pack (100) is heated and pressurized, the displacement sensors (42) measure the height of the battery cell terminals. The air blocking and exhaust mechanism (5) includes an axial flow fan (51), an exhaust duct (52), an air blocking component (53), a lifting bracket (54), and a lifting drive component (55). The air-blocking assembly (53) includes an air-blocking cover (531) and a sealing pad (532) fixed below the air-blocking cover (531). The sealing pad (532) is used to press on the air leakage hole of the lower box of the square battery pack (100). The axial flow fan (51) is connected to the air-blocking cover (531) through the exhaust pipe (52). The lifting bracket (54) and the lifting drive (55) are both fixedly connected to the temperature control table (211). The output end of the lifting drive (55) is fixedly connected to the air-blocking cover (531). The two ends of the air-blocking cover (531) are slidably connected to the lifting bracket (54).

2. The temperature-controlled and pressure-pressurized rapid curing system for prismatic battery packs according to claim 1, characterized in that, The hot air circulation mechanism (221) includes a hot air blower (2211), which is provided with an air outlet (2212) and a return air outlet (2213). The air outlet (2212) is connected to the air inlet below the air knife assembly (222) through an air inlet pipe (2214). The blower-type temperature control zone (24) is provided with a return air hole (2216), which is connected to the return air outlet (2213) through a return air pipe (2215). A heat insulation protective cover (223) is attached to the temperature control platform (211). The blower-type temperature control zone (24) is located inside the heat insulation protective cover (223), and the upper end of the heat insulation protective cover (223) abuts against the square battery pack (100).

3. The temperature-controlled and pressure-pressurized rapid curing system for prismatic battery packs according to claim 1, characterized in that, The lifting mechanism (11) is arranged in two sets facing each other. Each set of lifting mechanism (11) includes a supporting vertical plate (111), a supporting top plate (112), a side push drive (113), a side push block (114), a lifting drive (115), and a lifting plate (116). The two ends of the supporting top plate (112) are respectively slidably connected to a supporting vertical plate (111). The side push drive (113) and the lifting plate (116) are both fixed on the supporting top plate (112). The output end of the side push drive (113) is connected to the side push block (114), and the output end of the lifting drive (115) is connected to the lifting plate (116).

4. The temperature-controlled and pressure-pressurized rapid curing system for prismatic battery packs according to claim 1, characterized in that, The transverse mechanism (12) includes a support base plate (121), a transverse drive (122) fixed on the support base plate (121), a transverse rack (123) and a track plate (124). The output end of the transverse drive (122) is connected to a gear, which meshes with the transverse rack (123). The transverse rack (123) and the track plate (124) are parallel and fixedly connected. The support base plate (121) and the track plate (124) are slidably connected by a third guide rail slider group (125).

5. A method for rapid curing of a prismatic battery pack under controlled temperature and pressure, characterized in that, The method employing the temperature-controlled pressure-based rapid curing system for the prismatic battery pack according to any one of claims 1 to 4 includes the following steps: S1: Apply adhesive between the battery module and the lower housing. The backpack AGV trolley (200) carrying the square battery pack (100) with adhesive to be cured enters the docking position. S2: The transverse connection mechanism (1) lifts the square battery pack (100) and moves it transversely to the heating and pressurizing area, and the square battery pack (100) is fixed to the temperature control table (211). S3: Temperature control mechanism (2) performs contact heating and air blowing heating on the square battery pack (100), and air blocking and exhaust mechanism (5) seals the air leakage part in the lower box and performs negative pressure exhaust in the air blowing temperature control zone (24); S4: The pressurizing mechanism (3) presses onto the surface of the terminal post of the square battery pack (100) and maintains pressure; S5: After curing, the temperature control mechanism (2) and the pressurization mechanism (3) are reset, and the transverse transfer connection mechanism (1) lifts the square battery pack (100) and moves it to the connection position. The AGV trolley (200) loads the square battery pack (100) out of the station.

6. The method for rapid curing of a prismatic battery pack under controlled temperature and pressure according to claim 5, characterized in that, In step S2, after the transverse transfer mechanism (1) lifts the square battery pack (100) away from the AGV trolley (200), before entering the heating and pressurizing area, the visual ranging mechanism (4) measures and records the height of each pole on the surface of the square battery pack (100). In step S5, after curing is completed, the transverse connection mechanism (1) moves the square battery pack (100) to the connection position, and the visual ranging mechanism (4) measures and records the height of each pole on the surface of the square battery pack (100) again. In step S4, the pressurizing mechanism (3) presses down in three stages: First stage: The downward stroke of the pole plate (324) should not be less than 300mm, and the speed should be controlled at 40mm / s; Second stage: When the distance between the electrode plate (324) and the electrode surface does not exceed 10mm, the electrode plate (324) is pressed down at a speed of 5mm / s, and the speed is controlled at 5mm / s; Third stage: After the pole plate (324) contacts the pole, the pressing speed is reduced to 0.5mm / s, and the pressing stroke is controlled within 1mm.

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