Replaceable lithium battery charging and discharging mechanism

Abstract

The application discloses a replaceable lithium battery charging and discharging mechanism, which comprises a bottom plate, two support frames symmetrically arranged at the longitudinal ends of the bottom plate, at least one set of longitudinal driving air cylinders arranged in each support frame, the driving end of the longitudinal driving air cylinder being connected with the support frame, a tray supporting mechanism arranged between the two support frames, a battery tab clamping mechanism height replacement mechanism mounted on the support frame, the battery tab clamping mechanism comprising a needle plate frame, the needle plate frame being slidably arranged on the support frame, a jacking air cylinder being arranged at the bottom of the needle plate frame, the piston rod end of the jacking air cylinder being connected with the inner bottom of the support frame, a plurality of mutually parallel probe plates being mounted on the needle plate frame from top to bottom, a plurality of sets of probe assemblies being arranged at the inner side of each probe plate, and the height replacement mechanism being arranged between the needle plate frame and the support frame and comprising a connecting plate, a connecting shaft and a height replacement air cylinder. The application has the advantages of simultaneous operation on multiple trays, reliable power connection and strong compatibility.

Description

Technical Field

[0001] This invention relates to a replaceable lithium battery charging and discharging mechanism, belonging to the technical field of lithium-ion battery manufacturing. Background Technology

[0002] Currently, lithium batteries are increasingly widely used. Compared with traditional batteries, they offer advantages such as larger capacity, higher operating voltage, faster charging speed, wider operating temperature range, longer cycle life, smaller size, and lighter weight. Common types of lithium batteries include cylindrical, pouch, and prismatic. Cylindrical batteries are currently widely used as power and energy storage batteries, and they come in many varieties. After manufacturing, pouch lithium-ion batteries require capacity testing to activate the batteries and stabilize their performance indicators, such as internal resistance, output voltage, current, and power. Capacity testing is a crucial step in the production process of pouch lithium-ion batteries. Capacity testing involves subjecting activated batteries to several full-load charge-discharge cycles, testing AC / DC internal resistance, charge-discharge voltage, constant current discharge, constant voltage discharge, and constant power discharge curves. Batteries are then grouped to select those with similar electrical parameters for series and parallel connection, reducing the bottleneck effect in battery combinations.

[0003] There are many types of existing pouch lithium-ion batteries, resulting in variations in their size and the position of their tabs. During capacity testing of pouch lithium-ion batteries, the batteries are pre-placed in a battery tray, which is then placed into the capacity testing equipment. The equipment uses probes to contact the tabs on the pouch batteries to charge and discharge them. Existing equipment has the following problems: (1) It can only test batteries in one tray at a time, making it impossible to test batteries in multiple trays simultaneously, resulting in low production efficiency; (2) Due to the varying sizes and tab positions of pouch lithium-ion batteries, the equipment has poor compatibility. If operating on pouch lithium-ion batteries with different tab positions, manual replacement of the probe plates is required, increasing manufacturing and operating costs; (3) The probe mechanism reacts slowly upon contact with the pouch lithium-ion battery, failing to stop immediately and potentially squeezing the tabs, causing deformation and making the connection between the probe and the tabs unreliable. Therefore, there is an urgent need for a device that is highly compatible, can operate on batteries in multiple battery trays simultaneously, has reliable power connection, and improves production efficiency for charging and discharging soft-pack lithium-ion batteries. Summary of the Invention

[0004] To address the aforementioned issues, this invention proposes a replaceable lithium battery charger / discharger that can operate on multiple trays simultaneously, has reliable power connection, is compatible with batteries of various sizes, and meets different production needs.

[0005] The technical solution adopted in this invention is:

[0006] A replaceable lithium battery charging and discharging mechanism includes a base plate, which is a horizontally arranged rectangular plate. The length direction of the base plate is defined as longitudinal, and the width direction is defined as transverse. One transverse direction is defined as forward, and the other direction is defined as backward. Two support frames are symmetrically provided at both ends of the longitudinal direction of the base plate. The support frames are slidably mounted on the longitudinal guide shaft of the base plate. Each support frame is equipped with at least one set of longitudinal drive cylinders, which are mounted on the base plate and connected to the drive end of the longitudinal drive cylinders. A tray support mechanism is provided between the two support frames. The mechanism is characterized by:

[0007] A height-changing mechanism for the battery tab clamping mechanism is installed on the support frame. The battery tab clamping mechanism includes a needle plate frame, which is slidably mounted on a vertical guide rod of the support frame. A lifting cylinder is installed at the bottom of the needle plate frame, and the piston rod end of the lifting cylinder is connected to the inner bottom of the support frame to drive the needle plate frame to make vertical linear movement on the support frame. Multiple sets of probe mechanisms are installed on the needle plate frame from top to bottom, and several sets of probe assemblies are spaced apart on the inner side of each probe mechanism. The height-changing mechanism is located between the needle plate frame and the support frame, including a connecting... The system comprises a plate, a connecting shaft, and a height-changing cylinder. The connecting plate is elongated and installed laterally at the inner bottom of the support frame. Lateral guide rails are symmetrically arranged at both ends of the connecting plate, and a height-changing block is slidably mounted on each guide rail. Two height-changing blocks are connected by the connecting shaft. The top of each height-changing block has steps that increase in height from front to back. The drive end of the height-changing cylinder is connected to one of the height-changing blocks. When the height-changing block moves back and forth laterally, the bottom surface of the battery tab clamping mechanism can selectively contact one of the steps of the height-changing block.

[0008] Preferably, a longitudinal changing mechanism is provided between the support frame and the pallet support mechanism. The longitudinal changing mechanism includes a mounting plate, at least one transverse changing cylinder, and a limiting block. The mounting plate is fixed to the base plate and has a transverse slide rail. A transverse slider is slidably mounted on the transverse slide rail. On the side of the transverse slider away from the pallet support mechanism in the longitudinal direction, there are multiple parallel longitudinal limiting rods. The longitudinal limiting rods are of different lengths and are arranged in a row in the transverse direction. Each longitudinal limiting rod corresponds to a longitudinal adjustment position. The piston rod end of the transverse changing cylinder is connected to the transverse slider to drive the transverse slider to move linearly in the transverse direction. The limiting block is located in the gap and connected to the bottom of the support frame. When the support frame moves in the longitudinal direction, the limiting block can selectively contact the longitudinally aligned longitudinal limiting rods, and part of the longitudinal limiting rods are inserted into the gap between the support frame and the base plate.

[0009] More preferably, there are three sets of transverse changing cylinders, which are connected in series on the mounting plate, and the piston rod end of the outermost transverse changing cylinder is connected to the transverse slider.

[0010] Preferably, the pallet support mechanism includes a pair of oppositely arranged support frames. Each support frame includes a support column and a support plate. The support plate is horizontally mounted on the base plate by several support columns. The two support plates are at the same height, and the support plates are provided with blocks.

[0011] Preferably, the charging and discharging power supply box includes a power supply box body, which is a hollow cuboid with an open front end. Inside the power supply box body, there is a drive board, an inverter, and a power supply box auxiliary power supply. The drive board is electrically connected to the inverter and the power supply box auxiliary power supply. A heat dissipation window is provided on the rear panel of the power supply box body, and louvers are installed on the heat dissipation window.

[0012] Preferably, the needle plate frame is equipped with a heat dissipation device, which includes a heat dissipation fan and a heat dissipation hood. The heat dissipation fan is installed on the needle plate frame, and a heat dissipation hood is provided above each set of probe mechanisms. The bottom of the heat dissipation hood is provided with an air outlet, and the air outlet of the heat dissipation hood is aligned with the probe mechanism.

[0013] Preferably, the probe mechanism includes a longitudinal drive motor and a probe holder. The probe holder is mounted on a probe plate frame and has multiple longitudinal drive motors. The telescopic end of each longitudinal drive motor is fitted with a transversely arranged wedge plate. The wedge plate is elongated and slidably mounted on the longitudinal guide shaft of the probe holder. The inner end of the wedge plate has several comb-shaped insertion teeth for mounting probe assemblies. Each comb-shaped insertion tooth is fitted with a clamp-shaped probe assembly. The probes on the probe assembly are electrically connected to the inverter and the drive board, enabling charging and discharging operations on the soft-pack lithium-ion battery.

[0014] The present invention provides a charge / discharge machine, characterized in that it includes the replaceable lithium battery charge / discharge mechanism.

[0015] When performing formation and capacity testing on pouch lithium-ion batteries, multiple trays are stacked together and placed on a tray support mechanism. Blocks on the support mechanism position the battery trays. Because the battery types within the trays differ, and the tab heights of the pouch lithium-ion batteries vary, a height-changing mechanism is installed between the probe holder and the support frame. When the probe height needs adjustment, a lifting cylinder lifts the probe holder. By controlling the extension and retraction of the piston rod of the height-changing cylinder, the position of the height-changing block is adjusted. After adjusting to the appropriate position, the lifting cylinder descends, and the bottom of the probe holder rests on the step selected by the height-changing block. This ensures that the probe holder is constrained to a set height by two height-changing blocks. Since the two height-changing blocks are connected by a connecting shaft, their movements can be synchronized, thus meeting different height-changing requirements.

[0016] Even more advantageously, the gear of the longitudinal changing mechanism can be adjusted according to the type of battery in the tray. When the longitudinal drive cylinder is closed, the position of the longitudinal limit rod can be adjusted by extending and retracting the transverse changing cylinder, so that one of the longitudinal limit rods can be aligned with the limit block in the longitudinal direction. After the gear adjustment is completed, the longitudinal drive cylinder extends inward, driving the support frame to move towards each other. At the same time, the limit block at the bottom of the support frame moves synchronously until the limit block abuts against the end of the longitudinally aligned longitudinal limit rod. Part of the longitudinal limit rod can be inserted into the gap between the support frame and the bottom plate, preventing the remaining longitudinal limit rods from contacting the support frame. This allows the longitudinal drive cylinder to stop moving quickly and in a timely manner, effectively preventing the probe from pushing the battery tabs and causing deformation of the battery tabs during operation.

[0017] Even better, the battery needs to be repeatedly charged and discharged during the formation and capacity testing process, which generates a lot of heat, causing the battery to overheat and its internal resistance to fluctuate, thus affecting the battery's performance indicators. To control the battery's ambient temperature during formation and capacity testing, a cooling fan is installed on the probe holder; each probe mechanism is covered by a cooling duct with an air outlet at the bottom, aligned with the probe mechanism; the number of cooling fans and the angle of the cooling duct are adjusted according to requirements to ensure uniform temperature across different battery layers, significantly improving battery production efficiency while effectively controlling the temperature.

[0018] The advantages of this invention are: it can operate on multiple trays simultaneously, has reliable power connection, is compatible with batteries of various sizes, and meets different production needs; it also has good heat dissipation. Attached Figure Description

[0019] Figure 1 This is a structural diagram of the lithium battery charging and discharging mechanism of the present invention.

[0020] Figure 2 This is a front view of the lithium battery charging and discharging mechanism of the present invention.

[0021] Figure 3 This is a side view of the lithium battery charging and discharging mechanism of the present invention.

[0022] Figure 4 This is a top view of the lithium battery charging and discharging mechanism of the present invention.

[0023] Figure 5 This is a schematic diagram of the installation of the support frame and the battery tab clamping mechanism of the present invention.

[0024] Figure 6 This is a three-dimensional structural diagram of the height-changing mechanism of the present invention.

[0025] Figure 7This is a front view of the height-changing mechanism of the present invention.

[0026] Figure 8 This is a top view of the height-changing mechanism of the present invention.

[0027] Figure 9 This is a side view of the height-changing mechanism of the present invention.

[0028] Figure 10 yes Figure 7 The enlarged view shows the structure of the height-changing block.

[0029] Figure 11 This is a three-dimensional structural diagram of the longitudinal changing mechanism of the present invention.

[0030] Figure 12 This is a top view of the longitudinal changing mechanism of the present invention.

[0031] Figure 13 This is a side view of the longitudinal changing mechanism of the present invention.

[0032] Figure 14 This is a structural diagram of the probe mechanism of the present invention.

[0033] Figure 15 This is a front view of the probe mechanism of the present invention.

[0034] Figure 16 This is a side view of the probe mechanism of the present invention.

[0035] Figure 17 This is a side view of the probe mechanism of the present invention.

[0036] Figure 18 This is a partial cross-sectional view of the probe mechanism of the present invention, showing the insertion relationship between the wedge plate and the probe assembly.

[0037] Figure 19 yes Figure 18 The enlarged view of the cross-section shows the insertion relationship between the wedge plate and the probe assembly.

[0038] Figure 20 This is a structural diagram of the charger / discharger of the present invention.

[0039] Figure 21 This is a structural diagram of the charging and discharging power supply box of the present invention.

[0040] Figure 22 This is a rear view of the charging and discharging power supply box of the present invention, showing that the louvers are in the closed state.

[0041] Figure 23 This is a rear view of the charging and discharging power supply box of the present invention, showing that the louvers are in the open state.

[0042] Figure 24 This is a schematic diagram of the installation of the temperature sampling plate of the present invention.

[0043] Figure 25 This is a schematic diagram of the installation of the auxiliary power supply of the present invention.

[0044] Figure 26 This is a schematic diagram of the installation of the high-voltage switch of the present invention. Detailed Implementation

[0045] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of the present invention.

[0046] It should be noted that, unless otherwise specified, the embodiments and features described in the present invention can be combined with each other.

[0047] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0049] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0050] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0051] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0052] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments.

[0053] The present invention discloses a replaceable lithium battery charging and discharging mechanism, comprising a base plate 21, which is a horizontally arranged rectangular plate. The length direction of the base plate 21 is defined as longitudinal, and the width direction of the base plate 21 is defined as transverse. One transverse direction is defined as forward, and the other direction is defined as backward. Two support frames 211 are symmetrically provided at both ends of the longitudinal direction of the base plate 21. The support frames 211 are slidably mounted on the longitudinal guide shaft 212 of the base plate 21. Each support frame 211 is equipped with a set of longitudinal drive cylinders 213, which are mounted on the base plate 21. The longitudinal drive cylinders 213 drive the... The moving end is connected to the support frame 211; a tray support mechanism 25 is provided between the two support frames 211; a battery tab clamping mechanism 22 and a height changing mechanism 23 are installed on the support frame 211. The battery tab clamping mechanism 22 includes a needle plate frame 221, which is slidably mounted on the vertical guide rod of the support frame 211. A lifting cylinder 222 is installed at the bottom of the needle plate frame 221, and the piston rod end of the lifting cylinder 222 is connected to the inner bottom of the support frame 211 to drive the needle plate frame 221 to make vertical linear movement on the support frame 211; multiple sets of needle plate frames 221 are installed from top to bottom. The probe mechanism 223 has several sets of probe assemblies 224 spaced apart on its inner side. The probe assemblies 224 are electrically connected to the charging and discharging power supply 3. When the probes on the probe assemblies 224 contact the battery tabs, the probes, the charging and discharging power supply 3, and the soft-pack lithium-ion battery form a charging and discharging circuit. The charging and discharging power supply 3 provides energy for the charging and discharging of the battery, thereby performing charging and discharging operations on the soft-pack lithium-ion battery. The height changing mechanism 23 is set between the needle plate frame 221 and the support frame 211, and includes a connecting plate 231, a connecting shaft 232, and a height changing cylinder 233. The connecting plate 231 is elongated and is mounted laterally. The connecting plate 231, mounted on the inner bottom of the support frame 211, has symmetrically arranged transverse guide rails 234 at both ends. Each transverse guide rail 234 has a height changing block 235 slidably mounted on it. Two height changing blocks 235 are connected by a connecting shaft 232. The top of the height changing block 235 has multiple steps 2351, which increase in height from front to back. The drive end of the height changing cylinder 233 is connected to one of the height changing blocks 235. When the height changing block 235 moves back and forth in the transverse direction, the bottom surface of the battery tab clamping mechanism 22 can selectively contact one of the steps of the height changing block 235.

[0054] In some embodiments of the present invention, a longitudinal changing mechanism 24 is provided between the support frame 211 and the pallet support mechanism 25. The longitudinal changing mechanism 24 includes a mounting plate 241, at least one transverse changing cylinder 242, and a limiting block 243. The mounting plate 241 is fixed on the base plate 1. A transverse slide rail 244 is provided on the mounting plate 241. A transverse slider 245 is slidably arranged on the transverse slide rail 244. On the side of the transverse slider 245 away from the pallet support mechanism 25 in the longitudinal direction, there are multiple parallel longitudinal limiting rods 246. The lengths of the longitudinal limiting rods 246 are different. The longitudinal limit rods 246 are arranged in a row in the horizontal direction, and each longitudinal limit rod 246 corresponds to a longitudinal adjustment position. The piston rod end of the transverse changing cylinder 242 is connected to the transverse slider 245 to drive the transverse slider 245 to move linearly in the horizontal direction. The limit block 243 is located in the gap and is connected to the bottom of the support frame 211. When the support frame 211 moves in the longitudinal direction, the limit block 243 can selectively contact the longitudinal limit rods 246 aligned in the longitudinal direction, and part of the longitudinal limit rods 246 are inserted in the gap between the support frame 211 and the base plate 21.

[0055] In some embodiments of the present invention, there are three sets of transverse changing cylinders 242, which are sequentially connected on the mounting plate 241. One end of the transverse changing cylinder 242 is fixed outside the mounting plate 241, and the remaining transverse changing cylinders 242 are slidably engaged with the mounting plate 241. The piston rod end of the other end of the transverse changing cylinder 242 is connected to the transverse slider 245.

[0056] In some embodiments of the present invention, there are two sets of height changing cylinders 233, which are sequentially connected in the transverse direction on the connecting plate 231. The first height changing cylinder is fixed to the connecting plate 231, and the second height changing cylinder is slidably engaged with the connecting plate 231. The driving end of the second height changing cylinder is connected to one of the height changing blocks 235.

[0057] In some embodiments of the present invention, the pallet support mechanism 25 includes a pair of oppositely arranged support frames 251. The support frame 251 includes a support column 2511 and a support plate 2512. The support plate 2512 is horizontally mounted on the base plate 21 by several support columns 2511. The two support plates 2512 are at the same height, and the support plate 2512 is provided with a stop block 2513.

[0058] In some embodiments of the present invention, the probe mechanism 223 includes a longitudinal drive motor 2231 and a probe holder 2232. The probe holder 2232 is mounted on the needle plate holder 221. Multiple longitudinal drive motors 2231 are mounted on the probe holder 2232. A transversely arranged wedge plate 2232 is fitted to the telescopic end of the longitudinal drive motor 2231. The wedge plate 2233 is elongated and slidably mounted on the longitudinal guide shaft 2236 of the probe holder 2232. The inner end of the wedge plate 2233 is provided with a plurality of comb-shaped insertion teeth 2234 for mounting probe assemblies. A clamp-shaped probe assembly 224 is inserted into each comb-shaped insertion tooth 2234. The probes on the probe assembly 224 are electrically connected to the inverter 33 and the drive board 32, which can perform charging and discharging operations on the soft-pack lithium-ion battery.

[0059] In some embodiments of the present invention, the inner end of the probe holder 2232 is provided with a plurality of wedge-shaped guide blocks 2235 at intervals, and a plugging gap is left between two adjacent wedge-shaped guide blocks 2235 for inserting battery tabs, so that the battery tabs can be smoothly inserted into the corresponding probe assembly 224.

[0060] In some embodiments of the present invention, a heat dissipation device 26 is provided on the needle plate frame 221. The heat dissipation device 26 includes a heat dissipation fan 262 and a heat dissipation duct 261. The heat dissipation fan is installed on the needle plate frame 221. A heat dissipation duct 26 is provided on the top of each probe mechanism 223. An air outlet is provided at the bottom of the heat dissipation duct 26. The air outlet of the heat dissipation duct 26 is aligned with the probe mechanism 223.

[0061] The present invention provides a charge / discharge machine, including the replaceable lithium battery charge / discharge mechanism 2.

[0062] Specifically, the charge / discharge machine includes a cabinet 1, which houses a charge / discharge mechanism 2, a charge / discharge power supply box 3, a temperature control board 4, and an auxiliary power supply 5. The temperature control board 5 is electrically connected to the charge / discharge mechanism 2; the auxiliary power supply 4 is electrically connected to the charge / discharge mechanism 2, the charge / discharge power supply box 3, and the temperature control board 5. A high-voltage switch 6 is installed on the cabinet 1, and the charge / discharge power supply box 3, the temperature control board 4, and the auxiliary power supply 5 are electrically connected to the power supply via the high-voltage switch 6. The cabinet 1 serves as the supporting unit for the entire equipment; the charge / discharge mechanism 2 primarily ensures good contact between different batteries; the charge / discharge power supply box 3 primarily provides stable energy for battery charging and discharging; the auxiliary power supply 4 primarily provides energy for various PCB boards, sensors, and other low-voltage components; the temperature control board 5 is primarily responsible for collecting and analyzing the temperature of the charge / discharge mechanism 2 and the charge / discharge power supply box 3, and reporting it in real time; the high-voltage switch 6 primarily controls the power supply start-up of the entire equipment.

[0063] The cabinet 1 of this invention can be divided into multiple areas, each with its own specific functions, thereby reducing the impact of heat generation and current in each part and improving the performance of the charging and discharging equipment. This design facilitates the repair and replacement of components, is easy to maintain, and greatly saves on maintenance costs.

[0064] In some embodiments of the present invention, the charging and discharging power supply box 3 includes a box body 31, which is a hollow cuboid with an open front end. Inside the box body 31 are a drive board 32, an inverter 33, and a power supply auxiliary power supply 34. The drive board 32 is electrically connected to the inverter 33 and the power supply auxiliary power supply 34. A heat dissipation window is provided on the rear panel of the box body 31, and louvers 32 are installed on the heat dissipation window. The louvers 32 are equipped with a rotating handle 35 for controlling their opening and closing. By rotating the handle 35, the tilt angle of the louvers 32 is adjusted, controlling the size of the air outlet of the louvers 32, thereby achieving the purpose of regulating the airflow and ensuring that the temperature inside each box 31 remains consistent, thus improving equipment performance.

[0065] In some embodiments of the present invention, a through-beam sensor 2111 is provided on the support frame 211.

[0066] In some embodiments of the present invention, the temperature control board 4 is installed in the cabinet 1 by a pull-out method, which makes it more convenient for inspection and maintenance; the temperature control board 4 is electrically connected to the temperature probe integrated on the probe assembly 224, which can detect and record the temperature provided by the charging and discharging of the detection battery.

[0067] As shown in the figure, the auxiliary power supply 6 adopts a suspended design to separate the auxiliary switching power supply, which facilitates operation and maintenance.

[0068] As shown in the figure, the power switch 7 adopts an external mode, with commonly used buttons and circuit breakers installed on the cabinet 1. Common buttons include the stop button 71 and the start button 72. The height of the power switch 7 is about 1300mm, making it easy to control and convenient to operate.

[0069] When performing formation and capacity testing on pouch lithium-ion batteries, multiple trays 8 are stacked together and placed on a tray support mechanism 25. Blocks on the tray support mechanism 25 position the battery trays. Since the battery types within the trays differ and the tab heights of the pouch lithium-ion batteries vary, a height-changing mechanism 23 is installed between the probe holder 221 and the support frame 211. When the probe height needs adjustment, a lifting cylinder 222 lifts the probe holder 221. By controlling the extension and retraction of the piston rod of the height-changing cylinder 233, the position of the height-changing block 235 is adjusted. After adjusting to the appropriate position, the lifting cylinder descends, and the bottom of the probe holder 221 rests on the step selected by the height-changing block 235. This ensures that the probe holder 221 is constrained at a set height by the two height-changing blocks 235. Since the two height-changing blocks 235 are connected by a connecting shaft 232, their movements can be synchronized, thus meeting different height-changing requirements.

[0070] More advantageously, the gear of the longitudinal changing mechanism 24 can be adjusted according to the type of battery in the tray. When the longitudinal drive cylinder 213 is closed, the position of the longitudinal limiting rod 246 can be adjusted by extending and retracting the transverse changing cylinder 242, so that one of the longitudinal limiting rods 246 can be aligned with the limiting block 243 in the longitudinal direction. After the gear adjustment is completed, the longitudinal drive cylinder 213 extends inward, driving the support frame 211 to move towards each other. At the same time, the limiting block 243 at the bottom of the support frame 211 moves synchronously until the limiting block 243 abuts against the end of the longitudinally aligned longitudinal limiting rod 246. Part of the longitudinal limiting rod 246 can pass into the gap between the support frame 211 and the base plate 21, preventing the remaining longitudinal limiting rods 246 from contacting the support frame 211. This allows the longitudinal drive cylinder 213 to stop moving quickly and in a timely manner, effectively preventing the probe from pushing the battery tabs and causing deformation of the battery tabs during operation.

[0071] During the formation and capacity testing process, the battery needs to be repeatedly charged and discharged, generating a large amount of heat. This causes the battery to overheat, and high temperatures can lead to fluctuations in internal resistance, thus affecting the battery's performance. To control the ambient temperature of the battery during formation and capacity testing, a cooling fan is installed on the needle plate frame 221. Each probe mechanism 223 is covered with a cooling duct 26, with an air outlet at the bottom of the cooling duct 26 aligned with the probe mechanism 223. The number of cooling fans and the angle of the cooling duct 26 are adjusted according to requirements to ensure uniform temperature across different battery layers, thereby significantly improving battery production efficiency while effectively controlling the temperature.

[0072] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A replaceable lithium battery charging and discharging mechanism, comprising a base plate (21), the base plate (21) being a horizontally arranged rectangular plate, the length direction of the base plate (21) being defined as longitudinal, the width direction of the base plate (21) being defined as transverse, one transverse direction being defined as forward, and the other direction being defined as backward; two support frames (211) are symmetrically provided at both ends of the longitudinal direction of the base plate (21), the support frames (211) being slidably mounted on the longitudinal guide shaft (212) of the base plate (21); each support frame (211) is configured with at least one set of longitudinal drive cylinders (213), the longitudinal drive cylinders (213) being mounted on the base plate (21), and the drive end of the longitudinal drive cylinders (213) being connected to the support frame (211); a tray support mechanism (25) is provided between the two support frames (211), characterized in that: A battery tab clamping mechanism (22) and a height changing mechanism (23) are installed on the support frame (211). The battery tab clamping mechanism (22) includes a needle plate frame (221), which is slidably mounted on the vertical slide rail of the support frame (211). A lifting cylinder (222) is installed at the bottom of the needle plate frame (221). The piston rod end of the lifting cylinder (222) is connected to the inner bottom of the support frame (211) to drive the needle plate frame (221) to make a vertical linear movement on the support frame (211). Multiple probe mechanisms (223) are installed on the needle plate frame (221) from top to bottom. Several sets of probe assemblies (224) are spaced apart on the inner side of each probe mechanism (223). The height changing mechanism (23) is located between the needle plate frame (221) and the support frame (211), and includes a connecting plate (231), a connecting rod, and a connecting rod. The connecting shaft (232) and the height changing cylinder (233) are connected. The connecting plate (231) is long and is installed in the inner bottom of the support frame (211) in the transverse direction. The two ends of the connecting plate (231) are symmetrically provided with transverse guide rails (234). Each transverse guide rail (234) is slidably provided with a height changing block (235). The two height changing blocks (235) are connected by the connecting shaft (232). The top of the height changing block (235) is provided with a step (2351) that increases in height from front to back. Each step corresponds to a vertical position. The driving end of the height changing cylinder (233) is connected to one of the height changing blocks (235). When the height changing block (235) moves back and forth in the transverse direction, the bottom surface of the battery tab clamping mechanism (22) can selectively contact one of the steps (2351) of the height changing block (235).

2. The replaceable lithium battery charging and discharging mechanism according to claim 1, wherein: A longitudinal changing mechanism (24) is provided between the support frame (211) and the pallet support mechanism (25). The longitudinal changing mechanism (24) includes a mounting plate (241), at least one transverse changing cylinder (242), and a limiting block (243). The mounting plate (241) is fixed on the base plate (21). A transverse slide rail (244) is provided on the mounting plate (241). A transverse slider (245) is slidably arranged on the transverse slide rail (244). The transverse slider (245) has multiple parallel longitudinal limiting rods (246) on the side of the transverse slider (245) away from the pallet support mechanism (25) in the longitudinal direction. The lengths of the positioning rods (246) are different and they are arranged in a row in the transverse direction; the piston rod end of the transverse changing cylinder (242) is connected to the transverse slider (245) to drive the transverse slider (245) to move linearly in the transverse direction; the limiting block (243) is located in the gap and is connected to the bottom of the support frame (211); when the support frame (211) moves in the longitudinal direction, the limiting block (243) can selectively contact the longitudinally aligned longitudinal limiting rods (246), and part of the longitudinal limiting rods (246) are inserted in the gap between the support frame (211) and the base plate (21).

3. The replaceable lithium battery charging and discharging mechanism as described in claim 2, characterized in that: The number of transverse changing cylinders (242) is 3 sets, which are connected in series on the mounting plate (241). The piston rod end of the transverse changing cylinder (242) at the end is connected to the transverse slider (245).

4. The replaceable lithium battery charging and discharging mechanism as described in claim 1, characterized in that: The pallet support mechanism (25) includes a pair of opposing support frames (251). The support frame (251) includes a support column (2511) and a support plate (2512). The support plate (2512) is horizontally mounted on the base plate (21) by several support columns (2511). The two support plates (2512) are at the same height, and the support plate (2512) is provided with a stop block (2513).

5. The replaceable lithium battery charging and discharging mechanism as described in claim 1, characterized in that: A heat dissipation device (26) is provided on the needle plate frame (221). The heat dissipation device (26) includes a heat dissipation fan and a heat dissipation duct (261). The heat dissipation fan is installed on the needle plate frame (221). A heat dissipation duct (261) is provided on the top of each probe mechanism (223). An air outlet is provided at the bottom of the heat dissipation duct (261). The air outlet of the heat dissipation duct (261) is aligned with the probe mechanism (223).

6. The replaceable lithium battery charging and discharging mechanism as described in claim 1, characterized in that: The probe mechanism (223) includes a longitudinal drive motor (2231) and a probe holder (2232). The probe holder (2232) is mounted on the needle plate holder (221). The probe holder (2232) is equipped with multiple longitudinal drive motors (2231). The telescopic end of the longitudinal drive motor (2231) is fitted with a horizontally arranged wedge plate (2233). The wedge plate (2233) is long and slidably mounted on the longitudinal guide shaft (2236) of the probe holder (2232). The inner end of the wedge plate (2233) is provided with several comb-shaped insertion teeth (2234) for installing probe assemblies. Each comb-shaped insertion tooth (2234) is inserted into a clamp-shaped probe assembly (224). The probe on the probe assembly (224) is electrically connected to the drive board (32) through the inverter (33).

7. The replaceable lithium battery charging and discharging mechanism as described in claim 6, characterized in that: The probe holder (2232) has several wedge-shaped guide blocks (2235) spaced apart at its inner end, and there is a plugging gap between two adjacent wedge-shaped guide blocks (2235) for inserting battery tabs.

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