An assembling jig and assembling method of a multi-cell battery pack

Abstract

The application relates to the technical field of charging equipment, and discloses an assembling jig and an assembling method for a multi-cell battery pack, which comprises two fixed components arranged oppositely; the fixed component comprises a fixed support and a limiting assembly; the side surface of the fixed support is formed with an accommodating groove for accommodating a to-be-assembled cell and a communicating groove connected with the accommodating groove; the limiting assembly extends into the accommodating groove to position the to-be-assembled cell; when the two fixed components are aligned and abut against each other, the two accommodating grooves are combined into a dispensing chamber, and the two communicating grooves are combined into a dispensing channel; the dispensing channel is communicated with the dispensing chamber and is used for dripping glue into the space between the two to-be-assembled cells. The two cells are fixed first, a predetermined distance is kept, and then dispensing is carried out, so that the multi-cell battery pack with uniform thickness can be manufactured, and batch production is facilitated.

Description

Technical Field

[0001] This invention relates to the field of charging equipment technology, and in particular to an assembly fixture and assembly method for a multi-cell battery pack. Background Technology

[0002] With the rapid development of consumer electronics, power banks are being used more and more frequently. Currently, power banks with single-cell batteries often cannot meet the demands of high-power, long-lasting devices. Therefore, battery packs, which combine multiple cells in series or parallel, are gradually becoming the mainstream power solution for charging devices. In existing technologies, manufacturing multi-cell battery packs typically involves arranging multiple cells side-by-side and fixing them together using an adhesive process to form a structurally stable prototype, which is then used for subsequent welding of protection boards, covering with insulating films, or mounting in a casing.

[0003] However, during the manufacturing process, the thickness, height and other external dimensions of the battery cells inevitably have slight differences within a certain tolerance range. When multiple battery cells with size fluctuations are fixed side by side, the overall size of the finished battery pack will be uneven. This not only causes the external dimensions of the battery pack to not meet the preset uniform specifications, but also affects the smoothness of subsequent assembly into the casing, which is not conducive to the mass production of the product.

[0004] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide an assembly fixture and assembly method for multi-cell battery packs, which aims to solve the problem of inconsistent product specifications caused by differences in cell size during the manufacturing process of existing battery packs.

[0006] The technical solution of the present invention is as follows: An assembly fixture for a multi-cell battery pack includes two fixing components arranged opposite to each other; each fixing component includes a fixing bracket and a limiting component, the side of the fixing bracket having a receiving groove for accommodating the battery cell to be assembled and a communicating groove connecting the receiving groove; the limiting component extends into the receiving groove to position the battery cell to be assembled. When the two fixing components are aligned and attached to each other, the two receiving grooves combine to form a dispensing chamber, and the two connecting grooves combine to form a dispensing channel; the dispensing channel communicates with the dispensing chamber and is used to drip adhesive between the two cells to be assembled.

[0007] The assembly fixture for the multi-cell battery pack, wherein the fixing bracket is provided with an installation channel communicating with the receiving groove; the limiting component includes: Rigid pipe, provided in the installation channel; A suction cup is located at the front end of the rigid tube and within the receiving groove; the suction cup is used to contact and adsorb the battery cell to be assembled. A flexible hose is located at the rear end of the rigid tube; the flexible hose is used to connect an external negative pressure pump.

[0008] The assembly fixture for the multi-cell battery pack includes a first thread on the side wall of the mounting channel and a second thread on the outer surface of the rigid tube; the second thread engages with the first thread. The limiting component also includes an adjusting nut, which is sleeved on the rigid tube and used to adjust the insertion depth of the front end of the rigid tube.

[0009] The assembly fixture for the multi-cell battery pack includes a first limiting protrusion formed on the side wall of the receiving groove, and two opposing second limiting protrusions formed on the top and bottom walls of the receiving groove; the area between the first limiting protrusion and the second limiting protrusion is an assembly area for inserting the battery cell to be assembled. An avoidance area is formed between the two second limiting protrusions, and the avoidance area is used to avoid the electrode sheet of the battery cell to be assembled.

[0010] The assembly fixture for the multi-cell battery pack is provided with a plurality of connecting slots, which are spaced apart along the edge of the assembly area.

[0011] The assembly fixture for the multi-cell battery pack has an axially rectangular cross-sectional shape for the assembly area, and a plurality of the connecting slots are evenly arranged at the corners of the assembly area.

[0012] The assembly fixture for the multi-cell battery pack includes two sets of limiting components on the fixing component, which are arranged side by side along the length of the assembly area.

[0013] The assembly fixture for the multi-cell battery pack, wherein the side wall of the fixing bracket is provided with positioning protrusions and positioning grooves; When the two fixed brackets are in contact with each other, the positioning protrusions and positioning grooves on the two fixed brackets are adapted to each other.

[0014] The assembly fixture for the multi-cell battery pack includes a mounting bracket on which the receiving groove and the connecting groove are provided on the sides as a mating surface, and a plurality of vent holes are provided at intervals on the mating surface.

[0015] This application also discloses a method for assembling a multi-cell battery pack, comprising: Two battery cells to be assembled are arranged side by side along the thickness direction to form a preliminary fixing module; wherein the thickness of the preliminary fixing module is greater than the sum of the thicknesses of the two battery cells, and an assembly gap is formed between two adjacent battery cells; Adjust the initial fixing module to align at least one side of the two battery cells; Apply adhesive to the assembly gaps and allow it to cure.

[0016] Compared with the prior art, the embodiments of the present invention have the following advantages: The assembly fixture disclosed in this invention consists of two fixing components that can be fitted together to form a single unit. In this integrated state, the two fixing brackets are in contact and fitted together, the two receiving slots merge into a dispensing chamber, the two connecting slots merge into a dispensing channel, and the two sets of limiting components are also arranged in a relatively opposite manner. During the assembly of the multi-cell battery pack, two cells to be assembled are respectively installed onto the two sets of limiting components. When the two fixing brackets are aligned and fitted together, the two cells to be assembled can also maintain a relatively opposite arrangement. Moreover, as long as the distance between the two preset limiting components is greater than the sum of the thicknesses of the two cells to be assembled, a gap will be formed between the two cells. Adhesive is dripped into the gap through the dispensing channel and cured, thereby achieving the connection between the two cells to be assembled and completing the assembly of the multi-cell battery pack.

[0017] In this invention, since the distance between the two sets of limiting components is finite, if the thickness of the two cells to be assembled is large, the gap between them will be small; if the thickness of the two cells to be assembled is small, the gap between them will be large. However, as long as there is a gap, adhesive fixing can be achieved, so the final product specifications are relatively uniform. In addition, by accurately aligning the two fixing brackets, it is also beneficial to align the edges of the two cells to be assembled, further unifying the specifications of the battery pack products.

[0018] In summary, the assembly fixture disclosed in this invention can simultaneously limit the position of two cells to be assembled during the dispensing assembly process, so that the specifications of the finished battery pack are uniform, and subsequent packaging or casing processing can be completed smoothly, which is beneficial to mass production. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is an assembly diagram of the assembly fixture for the multi-cell battery pack and the battery cells to be assembled in this invention; Figure 2 This is a cross-sectional view of the assembly fixture and the cells to be assembled in the assembled state of the multi-cell battery pack in this invention. Figure 3 This is an exploded view of the assembly fixture for the multi-cell battery pack in this invention. Figure 4 This is a schematic diagram of the assembly fixture for the multi-cell battery pack in this invention; Figure 5 This is a schematic diagram of the structure of the fixing component in this invention; Figure 6 This is a structural schematic diagram of the fixing component from another angle in this invention; Figure 7 This is an assembly diagram of the fixing components and the battery cells to be assembled in this invention; Figure 8 This is a flowchart of the assembly method of the multi-cell battery pack in this invention.

[0021] Among them, 10 is a fixing component; 11 is a fixing bracket; 111 is a receiving groove; 1111 is a first limiting protrusion; 1112 is a second limiting protrusion; 1113 is an assembly area; 1114 is a clearance area; 112 is a connecting groove; 113 is a dispensing chamber; 114 is a dispensing channel; 115 is an installation channel; 116 is a positioning protrusion; 117 is a positioning groove; 118 is a vent hole; 12 is a limiting component; 121 is a rigid tube; 1211 is a second thread; 122 is a suction cup; 123 is a flexible tube; 124 is an adjusting nut; and 20 is a battery cell to be assembled. Detailed Implementation

[0022] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Due to manufacturing techniques and / or tolerances, variations in the shapes shown in the accompanying drawings may occur. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings, but include changes in shape that may occur during manufacturing. The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all contents, operations, or steps, nor do they necessarily need to be performed in the order described. For example, some operations or steps may be broken down, combined, or partially merged, so the actual order of execution may change depending on the specific circumstances.

[0024] As used herein, the term “and / or” includes any one of the relevant items listed and any combination of any two or more items.

[0025] Although terms such as “first,” “second,” and “third” may be used herein to describe individual components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts are not limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Therefore, without departing from the teachings of the examples described herein, the first component, assembly, region, layer, or part referred to as the second component, assembly, region, layer, or part may also be referred to as the second component, assembly, region, layer, or part.

[0026] For ease of description, spatial relational terms such as “above,” “upper,” “below,” and “lower” are used herein to describe the relationship between one element and another, as shown in the accompanying drawings. Such spatial relational terms are intended to encompass not only the orientation depicted in the drawings but also different orientations of the device during use or operation. For example, if the device in the drawings is flipped, an element described as being “above” or “upper” relative to another element will subsequently be “below” or “lower” relative to that other element. Therefore, the term “above” includes both “above” and “below” orientations depending on the spatial orientation of the device. The device may also be positioned in other ways, and the spatial relational terms used herein will be interpreted accordingly.

[0027] The terminology used herein is for the purpose of describing various examples only and is not intended to limit this disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms “comprising,” “including,” and “having” enumerate the stated features, quantities, operations, components, elements, and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof.

[0028] See Figure 1 , Figure 2 , Figure 3 and Figure 4In one embodiment of this invention application, an assembly fixture for a multi-cell battery pack is disclosed, comprising two fixing components 10 arranged opposite to each other; each fixing component 10 includes a fixing bracket 11 and a limiting component 12, wherein the side of the fixing bracket 11 is formed with a receiving groove 111 for accommodating a cell 20 to be assembled and a communicating groove 112 connecting the receiving groove 111; the limiting component 12 extends into the receiving groove 111 to position the cell 20 to be assembled; when the two fixing components 10 are aligned and fit together, the two receiving grooves 111 combine to form a dispensing chamber 113, and the two communicating grooves 112 combine to form a dispensing channel 114; the dispensing channel 114 communicates with the dispensing chamber 113 and is used to drip adhesive between the two cells 20 to be assembled.

[0029] The assembly fixture disclosed in this embodiment consists of two fixing parts 10, which can be fitted together to form a whole. In the integrated state, the two fixing brackets 11 are in contact with each other and fit together, the two receiving grooves 111 merge into a dispensing chamber 113, the two connecting grooves 112 merge into a dispensing channel 114, and the two sets of limiting components 12 are also arranged in a relative position.

[0030] like Figure 3 As shown, during the assembly of a multi-cell battery pack, two cells 20 to be assembled are respectively installed on two sets of limiting components 12. When the two fixing brackets 11 are aligned and in contact, the two cells 20 to be assembled can also maintain a relative setting. Moreover, as long as the distance between the two preset limiting components 12 is greater than the sum of the thicknesses of the two cells 20 to be assembled, a gap will be formed between the two cells 20 to be assembled. Adhesive is dripped into the gap through the dispensing channel 114 and cured to achieve the connection between the two cells 20 to be assembled, thus completing the assembly of the multi-cell battery pack.

[0031] In this embodiment, since the distance between the two sets of limiting components 12 is finite, if the thickness of the two cells 20 to be assembled is large, the gap between them will be small; if the thickness of the two cells 20 to be assembled is small, the gap between them will be large. However, as long as there is a gap, adhesive fixing can be achieved, so the final product specifications are relatively uniform. In addition, by accurately aligning the two fixing brackets 11, it is also beneficial to align the edges of the two cells 20 to be assembled, further unifying the specifications of the battery pack products.

[0032] In summary, the assembly fixture disclosed in this embodiment can simultaneously limit the two cells 20 to be assembled during the dispensing assembly process, so that the specifications of the finished battery pack are uniform, and subsequent packaging or casing processing can be completed smoothly, which is conducive to mass production.

[0033] Furthermore, in this embodiment, the two fixed supports 11 are mirror images of each other. When they are fitted together, the two receiving grooves 111 merge, and the center surface of the resulting dispensing chamber 113 coincides with the contact surface of the two fixed supports 11. Simultaneously, the two connecting grooves 112 merge, and the center surface of the resulting dispensing channel 114 also coincides with the contact surface of the two fixed supports 11. In other words, the dispensing chamber 113 and the dispensing channel 114 are arranged in a straight line. Based on this, the gap formed between the two battery cells 20 to be assembled is located in the middle area of ​​the dispensing chamber 113, so it faces the dispensing channel 114 directly. During the dispensing process, the glue is dispensed directly below the dispensing channel 114, which completes the operation and reduces the difficulty of operation.

[0034] like Figure 1 and Figure 4 As shown, in this embodiment, a chamfer can also be provided at the entrance of the dispensing channel 114 to increase the entrance area and facilitate the dripping of adhesive.

[0035] Specifically, in this embodiment, the two fixed components 10 can be stored separately, and can be assembled into one unit to form a closed dispensing chamber 113 when in use, which can reduce the interference of dust and dirt in the environment during the dispensing process.

[0036] Specifically, in this embodiment, along the insertion direction of the battery cell 20 to be assembled, the depth of the receiving groove 111 is greater than the thickness of at least one battery cell 20 to be assembled. Based on this, the battery cell 20 to be assembled can be completely assembled into the receiving groove 111 without protruding outside the receiving groove 111. When the two fixing brackets 11 are in contact with each other, the two battery cells 20 to be assembled can also avoid contact.

[0037] It should be noted that the battery cell 20 to be assembled disclosed in this embodiment can be a single cell or two or more cells stacked together. For example, two pre-stacked cells can be assembled on one fixing component 10, and a single cell can be assembled on another fixing component 10. Then, the two fixing brackets 11 are attached together and fixed by adhesive dispensing. After separating the two fixing brackets 11, a battery pack consisting of three cells connected as a whole can be obtained from the adhesive dispensing chamber 113. Similarly, the assembly fixture disclosed in this embodiment can assemble battery packs with four cells, battery packs with five cells, etc.

[0038] like Figure 3As shown, in another embodiment of this application, the fixing bracket 11 is provided with an installation channel 115 communicating with the receiving groove 111; the limiting component 12 includes a rigid tube 121, a suction cup 122 and a flexible tube 123, the rigid tube 121 is disposed in the installation channel 115; the suction cup 122 is disposed at the front end of the rigid tube 121 and located in the receiving groove 111; the suction cup 122 is used to contact and adsorb the battery cell 20 to be assembled; the flexible tube 123 is disposed at the rear end of the rigid tube 121; the flexible tube 123 is used to connect an external negative pressure pump.

[0039] The rigid tube 121 disclosed in this embodiment is made of rigid plastic, alloy or other materials and has a certain structural rigidity; the flexible tube 123 can be made of plastic materials such as polyvinyl chloride and polypropylene and has the advantage of being soft and can be bent; the suction cup 122 can be a vacuum suction cup 122 made of materials such as nitrile rubber, silicone, fluororubber or other materials to make close contact with the battery cell 20 to be assembled and maintain a good adsorption effect.

[0040] In this embodiment, the flexible hose 123 is connected to an external negative pressure pump to extract air from the rigid tube 121, causing the suction cup 122 at the front end of the rigid tube 121 to generate suction, thereby adsorbing the battery cell 20 to be assembled. The rigid tube 121 is inserted into the installation channel 115 to keep the front suction cup 122 stable. By using adsorption fixation, the battery cell 20 to be assembled can be quickly assembled and disassembled. In the assembled state, the connection is stable, and during the disassembly process, there is little wear on the battery cell, making the operation convenient.

[0041] like Figure 3 and Figure 5 As shown in another embodiment of this application, a first thread (not shown in the figures) is provided on the side wall of the mounting channel 115, and a second thread 1211 is provided on the outer surface of the rigid tube 121; the second thread 1211 engages with the first thread. The rigid tube 121 is screwed to the fixing bracket 11, which can reduce slippage and prevent loosening. Thus, during the process of assembling and disassembling the two fixing brackets 11, the stability of the battery cell can be maintained, the battery cell can be prevented from being disturbed by vibration, and the probability of the battery cell being accidentally dislodged can be reduced.

[0042] The limiting component 12 disclosed in this embodiment further includes an adjusting nut 124, which is sleeved on the rigid tube 121 and used to adjust the insertion depth of the front end of the rigid tube 121. One side of the adjusting nut 124 is attached to the surface of the fixed bracket 11. When the adjusting nut 124 rotates, the rigid tube 121 is pushed by the adjusting nut 124, producing a screw-in or screw-out action, which can achieve the effect of adjusting the depth of the front end of the rigid tube 121 inserted into the receiving groove 111.

[0043] Specifically, before assembling the battery pack, the required thickness parameters can be obtained. To meet these requirements, the two battery cells 20 to be assembled need to be connected by adhesive while maintaining a certain distance. During assembly, the two battery cells 20 are respectively adsorbed between two suction cups 122. The overall thickness of the two cells after they are joined together is the distance between the two suction cups 122. Therefore, based on the pre-obtained thickness parameter requirements, the distance between the two suction cups 122 can be calculated, and the depth of the rigid tube 121 inserted into the receiving groove 111 can be further calculated. By rotating the adjusting nut 124, the insertion depth of the rigid tube 121 can be adjusted.

[0044] After adjustment, as long as the adjusting nut 124 remains stationary, the rigid tube 121 can be locked in place, keeping the rigid tube 121 stable, which is conducive to accurate control of processing parameters. Moreover, the fixed bracket 11 and the limiting component 12 are integrated into one unit, with a stable structure. With the suction cup 122 stationary, it can be reused repeatedly to assemble multiple battery packs of the same specifications, which is conducive to achieving mass production.

[0045] like Figure 6 and Figure 7 As shown, in another embodiment of this application, a first limiting protrusion 1111 is formed on the side wall of the receiving groove 111, and two opposing second limiting protrusions 1112 are formed on the top and bottom walls of the receiving groove 111, respectively; an assembly area 1113 is formed between the first limiting protrusion 1111 and the second limiting protrusion 1112, the assembly area 1113 is used to insert the battery cell 20 to be assembled; an avoidance area 1114 is formed between the two second limiting protrusions 1112, the avoidance area 1114 is used to avoid the electrode sheet of the battery cell 20 to be assembled.

[0046] In this embodiment, the front end of the cell 20 to be assembled is provided with a positive electrode plate and a negative electrode plate. The first limiting protrusion 1111 and the second limiting protrusion 1112 are simultaneously modified to limit the main body of the cell 20 to be assembled, which helps maintain cell stability. At the same time, a clearance area 1114 for arranging the electrode plates is left between the two second limiting protrusions 1112 on the upper and lower sides, allowing the cell 20 to be assembled to be completely embedded in the receiving groove 111, avoiding contact and compression of the electrode plates, and helping to maintain the structural integrity of the battery pack.

[0047] Specifically, the first limiting protrusion 1111 disclosed in this embodiment can be disposed on the rear side of the receiving groove 111. When the battery cell 20 to be assembled is placed in the assembly area 1113, the rear end of the battery cell 20 to be assembled is in contact with the first limiting protrusion 1111, thereby positioning the rear surface of the battery cell 20 to be assembled. During the assembly process, both battery cells 20 to be assembled abut against the first limiting protrusion 1111 on the two fixed brackets 11. When the two fixed brackets 11 are in contact with each other and aligned, the two receiving grooves 111 are also aligned. At this time, the surfaces of the two first limiting protrusions 1111 are flush, so the rear surfaces of the two battery cells 20 to be assembled are flush, making the surface of the assembled battery pack more flat. Similarly, if the front surface of the battery cell 20 to be assembled contacts the second limiting protrusion 1112, it can also play a similar role, making the front surface of the finished battery pack flat.

[0048] In summary, in this embodiment, by abutting the battery cell 20 to be assembled against the side wall of the assembly area 1113, at least one side of the two battery cells 20 to be assembled can be aligned, thereby improving the consistency of the height or length direction of the finished battery pack, further unifying the molding specifications of the product, and facilitating mass production.

[0049] For example Figure 6 and Figure 7 As shown in another embodiment of this application, multiple connecting slots 112 are disclosed, and these multiple connecting slots 112 are spaced apart along the edge of the assembly area 1113. The connecting slots 112 disclosed in this embodiment are used to combine and form dispensing channels 114. Therefore, by spaced apart multiple connecting slots 112 along the edge of the assembly area 1113 to form multiple dispensing channels 114, dispensing operations can be performed at multiple locations, further increasing the connection strength between the two cells 20 to be assembled and increasing the structural strength of the finished battery pack. Since the connecting slots 112 are located at the edge of the assembly area 1113, directly facing the main body of the cell 20 to be assembled, it ensures that the adhesive flows to the effective location, connecting the cells 20 to be assembled on both sides.

[0050] Specifically, as another embodiment of this application, the assembly area 1113 is disclosed to have a rectangular cross-sectional shape along the axial direction, and a plurality of connecting grooves 112 are evenly arranged at the corners of the assembly area 1113. In this embodiment, the assembly area 1113 is adapted to the shape of the battery cell 20 to be assembled, and is set as a rectangle. The connecting grooves 112 are placed at the corners of the assembly area 1113. Therefore, when applying adhesive, the adhesive flows to the corner position of the battery cell 20 to be assembled, realizing the connection between the two battery cells 20. Compared to other positions, the corner position of the battery cell is farthest from the center point. When the battery cell supplies power and generates heat, due to the principle of thermal expansion and contraction, the battery cell will expand outwards from its own center point. At this time, the adhesive fixed at the corner position can be as far away from the heating point as possible, reducing the problem of delamination caused by thermal expansion and contraction.

[0051] like Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, in another embodiment of this application, two sets of limiting components 12 are provided on the fixing component 10, and the two sets of limiting components 12 are arranged side by side along the length direction of the assembly area 1113. The two sets of limiting components 12 disclosed in this embodiment can simultaneously adsorb the battery cell 20 to be assembled, so as to increase the stability of the battery cell 20 to be assembled, further control the dimensional accuracy during the assembly process, and further improve the uniformity of the specifications of the finished battery pack.

[0052] like Figure 2 , Figure 3 and Figure 6 As shown in another embodiment of this application, the side wall of the fixed bracket 11 is provided with a positioning protrusion 116 and a positioning groove 117; when the two fixed brackets 11 are fitted together, the positioning protrusion 116 and the positioning groove 117 on the two fixed brackets 11 are mutually adapted. In this embodiment, the two fixed brackets 11 need to be aligned very accurately when fitted together. Providing the positioning protrusion 116 and the positioning groove 117 helps to improve positioning accuracy and efficiency, thereby increasing assembly efficiency and reducing alignment difficulty.

[0053] For example Figure 6 As shown, in another embodiment of this application, the side of the fixed bracket 11 where the receiving groove 111 and the communicating groove 112 are provided is disclosed as a contact surface, and a plurality of vent holes 118 are provided at intervals on the contact surface. The contact surface disclosed in this embodiment needs to be completely contacted and accurately aligned. By providing vent holes 118, the difficulty of alignment is reduced, the impact force of contact is reduced, and the degree of contact is increased.

[0054] Specifically, as another embodiment of this application, the specific usage of the assembly fixture is disclosed as follows: (1) Rotate the adjusting nut 124 according to the preset width requirement so that the distance between the two suction cups 122 is consistent with the preset width requirement; (2) Place the battery cell 20 to be assembled into the receiving groove 111, at which time at least one side of the battery cell 20 to be assembled is attached to the side of the receiving groove 111, and the bottom edge of the battery cell 20 to be assembled is attached to the bottom edge of the receiving groove 111; (3) Start the negative pressure pump to make the suction cup 122 generate suction force to adsorb and fix the battery cell 20 to be assembled; (4) Combine and align the fixing brackets 11 on both sides; (5) Apply glue and light cure to the currently upward glue channel 114 through the glue dispensing equipment; (6) Flip the assembly fixture and apply glue and light cure to the glue channel 114 on the other side through the glue dispensing equipment; (7) Separate the two fixing brackets 11 and take out the finished battery pack after glue fixation.

[0055] like Figure 8 As shown, as another embodiment of this application, a method for assembling a multi-cell battery pack is also disclosed, comprising: Step S10: Arrange two battery cells to be assembled side by side along the thickness direction to form a preliminary fixing module; wherein, the thickness of the preliminary fixing module is greater than the sum of the thicknesses of the two battery cells, and an assembly gap is formed between two adjacent battery cells; Step S20: Adjust the preliminary fixing module to align at least one side of the two battery cells; Step S30: Apply adhesive to the assembly gap and apply it for curing.

[0056] In the assembly method disclosed in this embodiment, by arranging two battery cells side by side and aligning at least one side, the finished battery pack has uniform specifications in the width direction, height direction, or length direction after assembly. Therefore, the overall specifications can meet the processing requirements, which is beneficial for subsequent packaging or casing processes and facilitates mass production.

[0057] The assembly method disclosed in this embodiment can be applied to the assembly fixture disclosed in the above embodiments, but the assembly method disclosed in this embodiment is not limited to the use of the above assembly fixture, and can also be applied to the production and use of other similar devices.

[0058] In summary, this application discloses an assembly fixture for a multi-cell battery pack, including two fixing components 10 arranged opposite to each other. Each fixing component 10 includes a fixing bracket 11 and a limiting component 12. The side of the fixing bracket 11 has a receiving groove 111 for accommodating a cell 20 to be assembled and a communicating groove 112 connecting the receiving groove 111. The limiting component 12 extends into the receiving groove 111 to position the cell 20 to be assembled. When the two fixing components 10 are aligned and fit together, the two receiving grooves 111 combine to form a dispensing chamber 113, and the two communicating grooves 112 combine to form a dispensing channel 114. The dispensing channel 114 communicates with the dispensing chamber 113 and is used to drip adhesive between the two cells 20 to be assembled. Because the distance between the two sets of limiting components 12 is finite and does not change during assembly, if the thickness of the two cells 20 to be assembled is large, the gap between them will be small; if the thickness of the two cells 20 to be assembled is small, the gap between them will be large. However, as long as there is a gap, glue fixation can be achieved, so the final product specifications are relatively uniform. In addition, by accurately aligning the two fixing brackets 11, it is also beneficial to align the edges of the two cells 20 to be assembled, further unifying the specifications of the battery pack product. In summary, the assembly fixture disclosed in this embodiment can simultaneously limit the two cells 20 to be assembled during glue assembly, so that the specifications of the finished battery pack are uniform, facilitating the smooth completion of subsequent packaging or casing processing steps, which is beneficial for mass production.

[0059] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0060] It should be noted that this invention uses the assembly fixture and assembly method of multi-cell battery packs as an example to introduce the specific structure and working principle of the invention. However, the application of this invention is not limited to the assembly fixture and assembly method of multi-cell battery packs, and can also be applied to the production and use of other similar workpieces.

[0061] It should be understood that the present invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of the invention is limited only by the appended claims.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An assembly fixture for a multi-cell battery pack, characterized in that, It includes two fixed components arranged opposite to each other; the fixed components include a fixed bracket and a limiting component, the side of the fixed bracket is formed with a receiving groove for accommodating the battery cell to be assembled and a connecting groove for connecting the receiving groove; the limiting component extends into the receiving groove to position the battery cell to be assembled. When the two fixing components are aligned and attached to each other, the two receiving grooves combine to form a dispensing chamber, and the two connecting grooves combine to form a dispensing channel; the dispensing channel communicates with the dispensing chamber and is used to drip adhesive between the two cells to be assembled.

2. The assembly fixture for a multi-cell battery pack according to claim 1, characterized in that, The fixed bracket is provided with an installation channel communicating with the receiving groove; the limiting component includes: A rigid pipe is provided in the installation channel; A suction cup is located at the front end of the rigid tube and within the receiving groove; the suction cup is used to contact and adsorb the battery cell to be assembled. A flexible hose is located at the rear end of the rigid tube; the flexible hose is used to connect an external negative pressure pump.

3. The assembly fixture for a multi-cell battery pack according to claim 2, characterized in that, A first thread is provided on the side wall of the installation channel, and a second thread is provided on the outer surface of the rigid tube; the second thread engages with the first thread. The limiting component also includes an adjusting nut, which is sleeved on the rigid tube and used to adjust the insertion depth of the front end of the rigid tube.

4. The assembly fixture for a multi-cell battery pack according to any one of claims 1 to 3, characterized in that, A first limiting protrusion is formed on the side wall of the receiving groove, and two opposing second limiting protrusions are formed on the top and bottom walls of the receiving groove respectively; the area between the first limiting protrusion and the second limiting protrusion is an assembly area, which is used to insert the battery cell to be assembled. An avoidance area is formed between the two second limiting protrusions, and the avoidance area is used to avoid the electrode sheet of the battery cell to be assembled.

5. The assembly fixture for a multi-cell battery pack according to claim 4, characterized in that, Multiple connecting slots are provided, and the multiple connecting slots are spaced apart along the edge of the assembly area.

6. The assembly fixture for a multi-cell battery pack according to claim 5, characterized in that, The assembly area has a rectangular cross-sectional shape along the axial direction, and multiple connecting slots are evenly arranged at the corners of the assembly area.

7. The assembly fixture for a multi-cell battery pack according to claim 6, characterized in that, The fixing component is provided with two sets of limiting components, and the two sets of limiting components are arranged side by side along the length direction of the assembly area.

8. The assembly fixture for a multi-cell battery pack according to claim 1, characterized in that, The side wall of the fixed bracket is provided with positioning protrusions and positioning grooves; When the two fixed brackets are in contact with each other, the positioning protrusions and positioning grooves on the two fixed brackets are adapted to each other.

9. The assembly fixture for a multi-cell battery pack according to claim 1, characterized in that, The fixed bracket has a receiving groove and a connecting groove on its sides as a contact surface, and a number of vent holes are provided at intervals on the contact surface.

10. A method for assembling a multi-cell battery pack, characterized in that, include: Two battery cells to be assembled are arranged side by side along the thickness direction to form a preliminary fixing module; wherein the thickness of the preliminary fixing module is greater than the sum of the thicknesses of the two battery cells, and an assembly gap is formed between two adjacent battery cells; Adjust the initial fixing module to align at least one side of the two battery cells; Apply adhesive to the assembly gaps and allow it to cure.

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