Battery pack convenient to disassemble and battery pack disassembling and testing work station

Abstract

The utility model discloses a battery pack convenient to disassemble and a battery pack disassembling test work station, and belongs to the technical field of battery manufacturing. Comprising two pressing plates which are oppositely arranged, a battery unit is clamped between the two pressing plates, and a circuit connecting piece is arranged at the top of the battery unit; a tensioning strip is connected between the two pressing plates, and the tensioning strip and the pressing plates can tightly hoop the periphery of the battery unit; the bottom of the battery unit is coated with a U-shaped base, and the top of the battery unit is provided with a cover plate; according to the battery pack convenient to disassemble and the battery pack disassembling and testing work station, the two pressing plates and the multiple sets of tensioning strips are used for clamping the multiple sets of battery units together, then the multiple sets of battery units clamped together are integrally placed in the U-shaped base, and then the cover plate, the U-shaped base and the pressing plates are connected and fixed through the bolts and the buckles; the whole convenient-to-disassemble battery pack is simple in structure and convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model belongs to the field of battery manufacturing, and in particular relates to a detachable battery pack and a battery pack disassembly and testing station. Background Art

[0002] With the rapid development of new energy technologies, battery packs have been widely used in electric vehicles, energy storage systems, and other fields. However, during the production, use, and maintenance of battery packs, they often need to be disassembled and tested to understand battery performance, fault conditions, and more.

[0003] To maintain structural stability, common battery packs typically use numerous fasteners to secure the battery modules, resulting in a complex structure and difficult assembly. Furthermore, traditional battery pack disassembly is often performed manually, requiring operators to use various tools to separate the guide plates from the battery cells. This is not only inefficient but can also easily damage the batteries, impacting their performance and lifespan. Furthermore, this operation is inherently dangerous and requires high technical skills from the operator. Utility Model Content

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide a detachable battery pack and a battery pack disassembly and testing station. Two pressure plates and several sets of tensioning strips are used to clamp multiple battery cells together, and then the clamped multiple battery cells are placed as a whole in a U-shaped base. The cover plate, the U-shaped base, and the pressure plate are then connected and fixed by bolts and buckles. The entire detachable battery pack has a simple structure and is easy to disassemble and assemble.

[0005] To achieve the above-mentioned object, the technical solution adopted by the present invention is as follows: a detachable battery pack, comprising two opposing pressing plates, a battery cell being sandwiched between the two pressing plates, and a circuit connector being provided on the top of the battery cell;

[0006] Wherein, a plurality of groups of tension strips are fixedly connected between the two pressing plates by bolts, and the plurality of groups of tension strips and the two pressing plates can tighten the periphery of the battery cell;

[0007] The bottom of the battery cell is covered with a U-shaped base that can cover the tensioning strip, and the top of the battery cell is provided with a cover plate that can press down on the circuit connector. The cover plate and the circuit connector can be connected to the U-shaped base through a snap, and the U-shaped base and the circuit connector can be connected to the pressure plate through bolts.

[0008] Optionally, the circuit connector includes a circuit board and a plurality of guide plates capable of connecting the battery cells in series, and the guide plates are electrically connected to the circuit board via bonding wires.

[0009] Optionally, the pressure plate is provided with a fixer for connecting the tensioning strip, the two ends of the tensioning strip connected to the fixer are arc-shaped, and the edge of the pressure plate is provided with an arc-shaped portion that can fit with the two ends of the tensioning strip.

[0010] Optionally, a heat dissipation groove is provided on a side of the pressure plate facing away from the battery unit.

[0011] Optionally, a heat conducting plate is provided between the U-shaped base and the battery unit.

[0012] A battery pack disassembly and testing station, for disassembling and testing the portable battery pack described in any of the preceding items, comprising a frame, the frame being provided with a battery pack positioning fixture capable of linearly moving in a horizontal direction, the battery pack positioning fixture having a hollowed-out middle portion, the frame being provided with a clamping seat capable of vertically lifting and lowering to pass through the battery pack positioning fixture, and the frame being further provided with a placeholder capable of being horizontally inserted between two battery cells;

[0013] A bonding wire removal module and a connector disassembly module suspended above the rack are sequentially arranged along the moving direction of the battery pack positioning tool;

[0014] Among them, the bonding wire removal module includes a hook that can move horizontally and lift vertically above the battery pack positioning tooling, and the connecting key removal module includes a pneumatic drill that can move horizontally and lift vertically above the battery pack positioning tooling, and the pneumatic drill is provided with a milling cutter that can mill the guide plate.

[0015] Optionally, the battery pack positioning tool includes a positioning plate, on which two oppositely arranged positioning clamps are provided, and on which a cylinder capable of driving one of the positioning clamps to move toward the other positioning clamp is provided.

[0016] Optionally, the clamping seat is provided with a group of first L-shaped clamping seats that can be vertically raised and lowered relative to the clamping seat, and a group of the first L-shaped clamping seats can move toward or away from each other. The clamping seat is also provided with two groups of second L-shaped clamping seats symmetrical along the first L-shaped clamping seats, and the placeholder block is arranged coplanar with the first L-shaped clamping seat.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) Through the action of two pressure plates and several sets of tensioning strips, multiple groups of battery cells can be clamped together, and then the clamped multiple groups of battery cells are placed in the U-shaped base as a whole, and then the multiple groups of battery cells are connected in series through the circuit connector. Finally, the cover plate is pressed down on the circuit connector, and the cover plate, U-shaped base and pressure plate are connected and fixed by bolts and buckles. The entire detachable battery pack has a simple structure and is easy to disassemble and assemble;

[0019] (2) The battery pack positioning tool is used to position and fix the battery pack from which the U-shaped base and cover have been removed, and the battery pack is brought to the bottom of the bonding wire removal module by the battery pack positioning tool. The hook in the bonding wire removal module can hook on the bonding wire on the circuit connector and pull out the bonding wire; at the same time, when the battery pack is brought to the bottom of the pneumatic drill by the battery pack positioning tool, the milling cutter in the connection key removal module can mill the solder joint between the battery cell and the guide plate, and quickly release the connection between the battery cell and the guide plate. The whole process does not require too much human participation and is highly efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the exploded structure of the detachable battery pack in the preferred embodiment of the present invention;

[0022] Figure 2 This is a schematic structural diagram of a preferred embodiment of the present invention in which the guide plate and the circuit board are electrically connected via bonding wires;

[0023] Figure 3 This is a structural diagram of a battery pack disassembly and testing station in a preferred embodiment of the present invention;

[0024] Figure 4 This is a front structural diagram of a battery pack disassembly and testing station in a preferred embodiment of the present invention;

[0025] Figure 5 This is a structural diagram of the first L-shaped clamping seat and the second L-shaped clamping seat when they are installed on the clamping seat in the preferred embodiment of the present utility model;

[0026] Among them, 1. pressure plate; 101. heat dissipation groove; 2. battery unit; 3. tensioning strip; 4. U-shaped base; 5. cover plate; 6. circuit board; 7. guide plate; 8. bonding wire; 9. holder; 10. heat conducting plate; 11. rack; 12. hook; 13. pneumatic drill; 14. positioning plate; 15. positioning clamp seat; 16. clamping seat; 17. placeholder; 18. first L-shaped clamp seat; 19. second L-shaped clamp seat. DETAILED DESCRIPTION

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. These drawings are simplified schematic diagrams that only illustrate the basic structure of the present invention in a schematic manner, and therefore only show components related to the present invention.

[0028] It should be noted that if there are directional indications (such as up, down, bottom, top, etc.) involved in this embodiment, the directional indication is only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. Unless otherwise clearly specified and defined, the terms "set", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances. Example 1

[0029] like Figure 1-Figure 2 As shown, a detachable battery pack includes two relatively arranged pressure plates 1, a battery cell 2 is sandwiched between the two pressure plates 1, and a circuit connector is provided on the top of the battery cell 2; wherein, a plurality of groups of tensioning strips 3 are fixedly connected between the two pressure plates 1 by bolts, and the plurality of groups of tensioning strips 3 and the two pressure plates 1 can tighten the periphery of the battery cell 2; the bottom of the battery cell 2 is covered with a U-shaped base 4 that can cover the tensioning strip 3, and the top of the battery cell 2 is provided with a cover plate 5 that can be pressed down on the circuit connector, the cover plate 5 and the circuit connector can be connected to the U-shaped base 4 by snaps, and the U-shaped base 4 and the circuit connector can be connected to the pressure plate 1 by bolts.

[0030] Specifically, multiple battery cells 2 can be sandwiched between the two pressure plates 1. The multiple battery cells 2 are placed in a linear array. After the two pressure plates 1 are placed on both sides of the multiple battery cells 2, the ends of the multiple tensioning strips 3 are fixed to the two pressure plates 1 with bolts. Under the action of the two pressure plates 1 and the multiple tensioning strips 3, the multiple battery cells 2 can be clamped together. The multiple battery cells 2 that are clamped together are then placed as a whole in the U-shaped base 4. The multiple battery cells 2 are then connected in series through circuit connectors. Finally, the cover plate 5 is pressed down on the circuit connector, and the cover plate 5, U-shaped base 4, and pressure plate 1 are connected and fixed using bolts and buckles.

[0031] In this technical solution, the snap fasteners provided between the cover plate 5 and the U-shaped base 4 and between the circuit connector and the U-shaped base 4 are existing technologies, which can realize rapid positioning and assembly between the cover plate 5 and the U-shaped base 4 and between the circuit connector and the U-shaped base 4.

[0032] The removable battery pack of this technical solution has a simple structure and is easy to disassemble. Specifically, the pressure plate 1 and the tensioning strip 3 are tightened around the periphery of the battery cell 2, ensuring the stability and safety of the battery cell 2 during use. The pressure plate 1 wraps around the U-shaped base 4 and the cover plate 5 on the outside of the battery cell 2, forming a box-like structure that can completely enclose the battery cell 2, further increasing the structural strength of the battery pack.

[0033] Further, such as Figure 1 、 Figure 2 As shown, the circuit connector includes a circuit board 6 and several guide plates 7 that can connect the battery cells 2 in series. The guide plates 7 can be connected in series with the battery cells 2 by circular laser welding; the guide plates 7 and the circuit board 6 are electrically connected through bonding wires 8. The bonding wires 8 are conductive wires used to integrate the positive and negative electrodes on multiple groups of battery cells 2 on the circuit board 6, so that the circuit board 6 can monitor the power and status of each battery cell 2 in real time.

[0034] Further, such as Figure 1 As shown, the pressure plate 1 is provided with a fixer 9 for connecting the tensioning strip 3, the two ends of the tensioning strip 3 connected to the fixer 9 are arc-shaped, and the edge of the pressure plate 1 is provided with an arc-shaped portion that can fit with the two ends of the tensioning strip 3.

[0035] In this embodiment, a heat dissipation groove 101 is provided on the side of the pressure plate 1 facing away from the battery unit 2. The pressure plate 1 is made of a metal with good heat dissipation, such as aluminum, copper, etc., to facilitate heat dissipation of the battery unit 2. The heat dissipation groove 101 reduces the weight of the pressure plate 1 while increasing the area of contact between the pressure plate 1 and the environment, so that the detachable battery pack in this technical solution can have the characteristics of small space occupation, good heat dissipation performance, and light weight.

[0036] At the same time, a heat conducting plate 10 is provided between the U-shaped base 4 and the battery cell 2 to fill the gap between the U-shaped base 4 and the battery cell 2, thereby increasing the stability of the battery cell 2; and increasing the thermal conductivity between the U-shaped base 4 and the battery cell 2, thereby facilitating heat dissipation of the battery cell 2 through the U-shaped base 4. Example 2

[0037] like Figure 1-Figure 5As shown, based on the first embodiment, a battery pack disassembly and testing station is provided, wherein the frame 11 is provided with a battery pack positioning tool that can move linearly in a horizontal direction; a bonding wire removal module and a connector disassembly module suspended above the frame 11 are sequentially provided along the moving direction of the battery pack positioning tool; wherein, the bonding wire removal module includes a hook 12 that can move horizontally and rise and fall vertically above the battery pack positioning tool, and the connector key removal module includes a pneumatic drill 13 that can move horizontally and rise and fall vertically above the battery pack positioning tool, and the pneumatic drill 13 is provided with a milling cutter that can mill the guide vane 7.

[0038] Specifically, the battery pack positioning tool can move horizontally along the X-axis direction on the frame 11, and the hook 12 and the pneumatic drill 13 can move horizontally along the Y-axis direction and vertically lift and lower along the Z-axis direction on the frame 11. The X-axis direction, Y-axis direction, and Z-axis direction correspond to the three coordinate axes in the spatial rectangular coordinate system, and are perpendicular to each other. In the present technical solution, in order to increase the accuracy of the movement of the battery pack positioning tooling along the X-axis direction, a linear guide rail can be set between the frame 11 and the battery pack positioning tooling, and the battery pack positioning tooling can be accurately driven to move by a screw slide; at the same time, the hook and the pneumatic drill 13 can be respectively set on a group of multi-axis drive structures, and the multi-axis drive structure drives them to move horizontally along the Y-axis direction and vertically lift and lower along the Z-axis direction. Specifically, the multi-axis drive structure includes a gantry mounted on the frame 11, and a screw slide A is set on the gantry along the Y-axis direction, and a screw slide B is set along the Z-axis direction on the slider on the screw slide A. The hook and the pneumatic drill 13 are set on the screw slide B, and the pneumatic drill 13 can drive the milling cutter to rotate at high speed with the Z-axis as the rotation axis.

[0039] As mentioned above, the aforementioned detachable battery pack or the battery pack in the prior art can be placed on the battery pack positioning tooling, and the battery pack positioning tooling can position and fix the battery pack, and can bring the battery pack to the bottom of the bonding wire removal module, by driving the battery pack positioning tooling to move the screw slide and the screw slide A, the screw slide B, etc. to cooperate with each other, so that the pull hook 12 can hook on the bonding wire 8 on the circuit connector, and can pull out the bonding wire 8; at the same time, when the screw slide drives the battery pack positioning tooling to move to the bottom of the pneumatic drill 13, by driving the battery pack positioning tooling to move the screw slide and the screw slide A, the screw slide B, etc. to cooperate with each other, the milling cutter can mill the weld between the battery unit 2 and the guide plate 7, and quickly release the connection relationship between the battery unit 2 and the guide plate 7.

[0040] Further, such as Figure 3As shown, the battery pack positioning tooling includes a positioning plate 14. Two relatively arranged positioning clamp seats 15 are provided on the positioning plate 14. A cylinder capable of driving one of the positioning clamp seats 15 to move towards the other positioning clamp seat 15 is arranged on the positioning plate 14. The positioning clamp seat 15 is in a "U" shape. For the aforementioned detachable battery pack, the two positioning clamp seats 15 can be respectively clamped on the pressure plate 1. By driving one positioning clamp seat 15 to move towards the other positioning clamp seat 15 through the cylinder, the position of the battery pack can be effectively fixed, ensuring the uniqueness of the position between the battery pack and the positioning plate 14. At the same time, the pressure plates 1 at both ends of the detachable battery pack are clamped in the X-axis direction, which can reduce the tension on the tension strip 3 to facilitate removing the tension strip 3 from the pressure plate 1. Embodiment III

[0041] As Figure 3-Figure 5 shown, on the basis of Embodiment I and Embodiment II, to facilitate replacing the damaged battery cells 2 in the battery pack, the middle part of the battery pack positioning tooling is in a hollow shape. A clamping seat 16 capable of vertically lifting and passing through the battery pack positioning tooling is arranged on the frame 11, and a placeholder block 17 capable of horizontally inserting between the two battery cells 2 is also arranged on the frame 11; wherein, a set of first L-shaped clamp seats 18 capable of vertically lifting relative to the clamping seat 16 are arranged on the clamping seat 16, and the set of first L-shaped clamp seats 18 can move towards or away from each other. Two sets of second L-shaped clamp seats 19 symmetrical along the first L-shaped clamp seats 18 are also arranged on the clamping seat 16. The placeholder block 17 and the first L-shaped clamp seats 18 are arranged on the same plane.

[0042] Specifically, the placeholder 17 can be driven by a pneumatic cylinder mounted on the frame 11. The battery pack positioning tool can be moved directly above the clamping seat 16, with the first L-shaped clamping seat 18 aligned with the damaged battery cell 2. A set of first L-shaped clamping seats 18 can be moved to clamp onto either side of the damaged battery cell 2. At this point, two sets of second L-shaped clamping seats 19 are supported on the bottoms of two adjacent battery cells 2. As the first L-shaped clamping seats 18 grip the battery cell 2 and move downward, the two sets of second L-shaped clamping seats 19 remain relatively stationary. During this process, after the first L-shaped clamping seats 18 grip the battery cell 2 and move downward a certain distance, the replacement battery cell 2 drops to a height sufficient for the placeholder 17 to be inserted, while still contacting the battery cells 2 on either side. After the placeholder 17 is inserted, the first L-shaped clamping seats 18 can continue to move downward, holding the battery cell 2. The battery cell 2 gripped by the first L-shaped clamping seats 18 can then be manually removed and replaced with a new battery cell 2. Then, the reverse operation is performed, with the first L-shaped clamp 18 carrying the new battery cell 2 moving upward until it contacts the placeholder 17. The placeholder 17 is then removed from the battery pack, and the new battery cell 2 is pushed back to its original position. Finally, the first set of L-shaped clamps 18 is opened and reset, completing the replacement of the battery cell 2.

[0043] As mentioned above, in order to ensure that the remaining battery cells 2 remain in a compressed state during the entire process of replacing the battery cell 2, the width of the placeholder block 17 is greater than the width of a single battery cell 2, and the placeholder block 17 is provided with arc chamfers on both sides of one end facing the battery cell 2, so that the width of this end of the placeholder block 17 is smaller than the width of a single battery cell 2, thereby facilitating the insertion of the placeholder block 17.

[0044] The above, such as Figure 5As shown, the clamping seat 16 can be slidably connected to the frame 11 through a linear guide rail A set along the Z-axis direction; the clamping seat 16 is also provided with a group of linear guide rails B set along the Z-axis direction, and a mounting seat is slidably connected to the linear guide rail B. The mounting seat is provided with a group of linear guide rails C set along the Y-axis direction, and a group of first L-shaped clamping seats 18 can be slidably connected to the mounting seat through the linear guide rail C, and the mounting seat is provided with a cylinder capable of driving a group of first L-shaped clamping seats 18 to move toward or away from each other. The cylinder can select the clamping claw cylinder in the prior art, or select One or two ordinary pneumatic cylinders are used to respectively drive the first L-shaped clamping seat 18 to move, or to drive one of the first L-shaped clamping seats 18 to move toward the other first L-shaped clamping seat 18; the vertical lifting and lowering of the first L-shaped clamping seat 18 along the Z-axis direction can be driven by a pneumatic cylinder arranged on the clamping seat 16 along the Z-axis direction, the piston rod of the cylinder being connected to the mounting seat, and the cylinder is driven to move the mounting seat relative to the clamping seat 16 along the Z-axis direction; at the same time, the vertical lifting and lowering of the clamping seat 16 along the Z-axis direction can be achieved by another pneumatic cylinder arranged on the frame 11 along the Z-axis direction. In this technical solution, when driving one of the first L-shaped clamping seats 18 to move toward the other first L-shaped clamping seat 18, the lifting height and horizontal displacement distance of the first L-shaped clamping seat 18 can be monitored and precisely controlled in real time by adding existing technologies such as limiters and brakes.

[0045] Working Principle: First, two pressure plates 1 are placed on either side of multiple battery cells 2. Then, multiple tensioning strips 3 are bolted to the two pressure plates 1 at both ends. The two pressure plates 1 and the tensioning strips 3 act to clamp the multiple battery cells 2 together. The clamped battery cells 2 are then placed inside a U-shaped base 4. The battery cells 2 are then connected in series using circuit connectors. Finally, a cover plate 5 is pressed down onto the connectors. Bolts and buckles are used to secure the cover plate 5, U-shaped base 4, and pressure plates 1 to create a removable battery pack with a simple structure and easy disassembly.

[0046] The above description is based on the ideal embodiment of the present invention. Based on the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A detachable battery pack, characterized in that: It comprises two pressing plates (1) arranged opposite to each other, a battery unit (2) being sandwiched between the two pressing plates (1), and a circuit connector being provided on the top of the battery unit (2); Wherein, a plurality of groups of tensioning strips (3) are fixedly connected between the two pressing plates (1) by bolts, and the plurality of groups of tensioning strips (3) and the two pressing plates (1) can tighten the outer periphery of the battery unit (2); The bottom of the battery unit (2) is covered with a U-shaped base (4) capable of covering the tensioning strip (3); the top of the battery unit (2) is provided with a cover plate (5) capable of pressing down on the circuit connector; the cover plate (5) and the circuit connector can be connected to the U-shaped base (4) by means of a snap; and the U-shaped base (4) and the circuit connector can be connected to the pressure plate (1) by means of bolts.

2. The detachable battery pack according to claim 1, wherein: The circuit connector comprises a circuit board (6) and a plurality of guide plates (7) capable of connecting the battery cells (2) in series, wherein the guide plates (7) are electrically connected to the circuit board (6) via bonding wires (8).

3. The detachable battery pack according to claim 1, wherein: The pressure plate (1) is provided with a fixer (9) for connecting to the tensioning strip (3), the two ends of the tensioning strip (3) connected to the fixer (9) are arc-shaped, and the edge of the pressure plate (1) is provided with an arc-shaped portion that can fit with the two ends of the tensioning strip (3).

4. The detachable battery pack according to claim 1, wherein: A heat dissipation groove (101) is provided on a side of the pressure plate (1) facing away from the battery unit (2).

5. The detachable battery pack according to claim 1, wherein: A heat conducting plate (10) is provided between the U-shaped base (4) and the battery unit (2).

6. A battery pack disassembly and testing station, characterized by: A device for disassembling and testing the detachable battery pack according to any one of claims 1 to 5, comprising a frame (11), the frame (11) being provided with a battery pack positioning tool capable of moving linearly in a horizontal direction, the middle portion of the battery pack positioning tool being hollowed out, the frame (11) being provided with a clamping seat (16) capable of vertically lifting and lowering to pass through the battery pack positioning tool, and the frame (11) being further provided with a placeholder (17) capable of being inserted horizontally between two battery cells (2); A bonding wire removal module and a connector disassembly module suspended above the rack (11) are sequentially arranged along the moving direction of the battery pack positioning tool; The bonding wire removal module includes a hook (12) capable of horizontally moving and vertically lifting above the battery pack positioning tooling, and the connection key removal module includes a pneumatic drill (13) capable of horizontally moving and vertically lifting above the battery pack positioning tooling, wherein the pneumatic drill (13) is provided with a milling cutter capable of milling the guide plate (7).

7. The battery pack disassembly and testing station according to claim 6, characterized in that: The battery pack positioning tool comprises a positioning plate (14), two positioning clamp seats (15) arranged opposite to each other are provided on the positioning plate (14), and a cylinder capable of driving one of the positioning clamp seats (15) to move toward the other positioning clamp seat (15) is provided on the positioning plate (14).

8. The battery pack disassembly and testing station according to claim 6, characterized in that: The clamping seat (16) is provided with a group of first L-shaped clamping seats (18) that can be vertically lifted and lowered relative to the clamping seat (16), and a group of the first L-shaped clamping seats (18) can move toward or away from each other. The clamping seat (16) is also provided with two groups of second L-shaped clamping seats (19) symmetrical along the first L-shaped clamping seats (18), and the placeholder block (17) is arranged coplanar with the first L-shaped clamping seat (18).

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