Extrusion tool and device for battery cell stacking and battery cell cluster processing system

Abstract

The utility model discloses an extrusion tool and device for battery cell stacking and a battery cell cluster processing system, which belong to the technical field of battery production and comprise a fixed seat, a sliding mechanism, a telescopic mechanism and an extrusion plate, a sliding mechanism and a telescopic mechanism are arranged on the fixed seat; the extrusion plate is in sliding connection with the fixed seat through a sliding mechanism; the driving end of the telescopic mechanism is connected to the extrusion plate; and when the telescopic mechanism works, the extrusion plate is driven to slide on the sliding mechanism and is used for extruding the battery cell cluster. According to the extrusion tool and device for stacking the battery cells and the battery cell cluster processing system, the battery cell clusters can be firstly extruded in the assembling process, glue between the battery cells fully plays a role, the adhesion between the battery cells is better, the battery cell clusters can be extruded into a fixed size, bundling of the battery cell clusters in the next step is facilitated, and the structure is simple.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery production, and particularly relates to an extrusion tooling and device for cell stacking and a cell cluster processing system. Background Technique

[0002] With the increasingly severe global environmental problems and the prominent energy crisis, new energy vehicles, as an important means to address environmental pollution and energy consumption, are gradually becoming the development focus of the global automotive industry. New energy vehicles use power batteries as the power source and non-traditional fuels to reduce dependence on traditional fossil fuels, thereby reducing environmental pollution.

[0003] The battery pack is an important component of the power battery, providing energy and power for the storage of new energy vehicles. In the prior art, generally, single cells are connected in series and parallel to form a battery module, and then the battery modules are connected in series to form a battery pack. Each battery module clamps the battery through a belt. After the battery module is placed in the battery box, it is fixed to the battery box through the end plate on the battery module. However, in this modular structure, there is an expansion space between single cells, and there is also a gap for installing the end plate between battery modules. The modular battery pack structure is complex, with many types of components, and the space utilization rate of the battery box is very low. The number of single cells that can be accommodated in a battery box of the same volume is reduced, reducing the battery capacity of the battery pack and affecting the endurance ability.

[0004] To improve the energy density of the battery pack, often many components are reduced, such as a battery pack in a cell-to-pack form. Generally, the battery packs installed on electric vehicles are assembled from cells into modules, and then the modules are installed in the battery pack, forming a three-level assembly mode of "cell-module-battery pack".

[0005] The cell-to-pack (CTP) technology is to directly integrate the cells on the battery pack by canceling the battery module design, skipping the standardized module link and saving the intermediate module link, effectively improving the space utilization rate and energy density of the battery pack. Currently, there are two technical routes: the completely module-free method and the method of replacing small modules with large modules. For example, a module-free battery pack structure with the Chinese patent publication number CN206148499U directly stacks the cells into the box and then uses wedges to press the batteries in the box, which can effectively reduce the number of fasteners in the battery box, simplify the box structure and installation production process, realize large-scale production, reduce the types of accessories, and at the same time greatly shorten the development cycle, having good application prospects.

[0006] For the above-mentioned module-free battery pack, the battery cells are directly stacked into the battery pack box. Although wedges are used to press the battery cells tightly in the box, the wedges here are assembled in the box together with the battery cells, and the wedges will occupy the space inside the box. Then, can the stacked battery cells (hereinafter referred to as battery cell clusters) be extruded outside the box first, or can the battery cells stacked in the box be directly extruded by a tooling? This can not only form an extrusion on the stacked battery cells first, reducing the components that need to be strongly extruded during the assembly of the stacked battery cells, but also, for the battery cells with large-area glue coating, can extrude the glue between the battery cells, making the bonding between the battery cells better. Utility Model Content

[0007] The purpose of the present utility model is to provide an extrusion tooling, device and battery cell cluster processing system for battery cell stacking in view of the above deficiencies, which realizes how to extrude the battery cell clusters together and then assemble them, enables the glue between the battery cells to play its full role, makes the bonding between the battery cells better, can also extrude the battery cell clusters into a fixed size, facilitating the bundling of the battery cell clusters in the next step, and has a simple structure. To achieve the above purpose, the present utility model provides the following technical solutions:

[0008] An extrusion tooling for battery cell stacking includes a fixed seat, a sliding mechanism, a telescopic mechanism and an extrusion plate; the fixed seat is provided with a sliding mechanism and a telescopic mechanism; the extrusion plate is slidably connected to the fixed seat through the sliding mechanism; the driving end of the telescopic mechanism is connected to the extrusion plate; when the telescopic mechanism works, it drives the extrusion plate to slide on the sliding mechanism for extruding the battery cell cluster.

[0009] Further, the sliding mechanism includes a sliding component; the sliding component includes a sliding track, a sliding seat and a sliding piece; the sliding track is fixed on the fixed seat; a slidable sliding seat is arranged on the sliding track; a sliding piece is fixed on the sliding seat; one end of the sliding piece is connected with the extrusion plate.

[0010] Further, the telescopic mechanism includes a cylinder seat and a cylinder machine; the cylinder machine is fixed on the cylinder seat, and the piston rod of the cylinder machine is directly or indirectly connected to the extrusion plate to drive the extrusion plate to move.

[0011] Further, a connecting block is arranged on the piston rod of the cylinder machine; the connecting block is connected with the extrusion plate (4).

[0012] Further, one or more insulating seats are arranged on the side of the extrusion plate facing the battery cell cluster.

[0013] Further, the fixed seat includes a first fixed seat and a second fixed seat; the bottom of the first fixed seat is connected to the workbench surface; the second fixed seat is arranged on the first fixed seat; the sliding track and the cylinder seat are fixed on the second fixed seat.

[0014] Further, a connecting rib plate is provided between the first fixing seat and the second fixing seat.

[0015] Further, a weight-reducing hole is provided on the second fixing seat.

[0016] An extrusion device for battery cell stacking includes two above-mentioned extrusion toolings, and the extrusion plates of the two extrusion toolings are arranged oppositely.

[0017] A battery cell cluster processing system includes at least one above-mentioned extrusion device.

[0018] The beneficial effects of the present utility model are:

[0019] The present utility model discloses an extrusion tooling, device and battery cell cluster processing system for battery cell stacking. The extrusion tooling includes a fixing seat, a sliding mechanism, a telescopic mechanism and an extrusion plate; the fixing seat is provided with a sliding mechanism and a telescopic mechanism; the extrusion plate is slidably connected to the fixing seat through the sliding mechanism; the driving end of the telescopic mechanism is connected to the extrusion plate; when the telescopic mechanism works, it drives the extrusion plate to slide on the sliding mechanism for extruding the battery cell cluster. The extrusion tooling, device and battery cell cluster processing system of the present utility model can, during assembly, first extrude the battery cell cluster to make the glue between the battery cells fully play its role, so that the bonding between the battery cells is better, and can also extrude the battery cell cluster into a fixed size for facilitating the bundling of the battery cell cluster in the next step, and has a simple structure. Description of the Drawings

[0020] Figure 1 is a three-dimensional structural schematic diagram of the extrusion tooling of the present utility model;

[0021] Figure 2 is a three-dimensional structural schematic diagram of the sliding assembly of the present utility model;

[0022] Figure 3 is a disassembled three-dimensional structural schematic diagram of the sliding assembly of the present utility model;

[0023] Figure 4 is a three-dimensional structural schematic diagram of the telescopic mechanism of the present utility model;

[0024] Figure 5 is a three-dimensional structural schematic diagram of the fixing seat of the present utility model;

[0025] Figure 6 is a three-dimensional structural schematic diagram of the extrusion device of the present utility model;

[0026] In the attached drawings: 1 - fixed seat, 11 - first fixed seat, 12 - second fixed seat, 2 - sliding mechanism, 21 - sliding assembly, 211 - sliding track, 212 - sliding seat, 213 - sliding member, 3 - telescopic mechanism, 31 - cylinder seat, 32 - cylinder machine, 33 - connecting block, 4 - extrusion plate, 5 - insulating seat, 6 - workbench, 7 - connecting rib plate, 8 - weight reduction hole, 9 - battery cell cluster. Detailed implementation manners

[0027] The battery cell cluster is formed by stacking multiple battery cells in series or parallel, and is a description of an intermediate state before the battery cells are put into the battery box.

[0028] The present utility model will be further described in detail below in conjunction with the attached drawings and specific implementation manners, but the present utility model is not limited to the following embodiments.

[0029] Embodiment 1:

[0030] Figure 1 The specific structure of the extrusion tooling is shown. A kind of extrusion tooling for battery cell stacking includes a fixed seat 1, a sliding mechanism 2, a telescopic mechanism 3 and an extrusion plate 4. The fixed seat 1 is used to fix the whole extrusion tooling. The extrusion plate 4 is used to directly contact the battery cell cluster 9 and extrude the battery cell cluster 9. The sliding mechanism 2 and the telescopic mechanism 3 are fixed on the fixed seat 1, and the extrusion plate 4 is arranged on the sliding mechanism 2. The extrusion plate 4 can be driven by the sliding mechanism 2 to move relative to the fixed seat 1, making a movement closer to or farther from the battery cell cluster 9. A rubber sleeve can also be arranged on the front side of the extrusion plate 4 to avoid damaging the battery cells. The extrusion plate 4 is connected to the driving end of the telescopic mechanism 3, and the telescopic mechanism 3 is used to drive the extrusion plate 4 to slide along the sliding mechanism 2 to extrude the battery cell cluster 9. A kind of extrusion tooling for battery cell stacking of the present utility model can extrude the battery cell cluster 9 during assembly to realize the large-area fitting between battery cells. For the battery cell cluster 9 with glue applied on the large area of the battery cells, the glue can be extruded at the same time, making the bonding between battery cells better. Moreover, the extrusion tooling of the present utility model has a simple structure and is easy to operate.

[0031] A flexible contact part, such as a rubber sleeve, etc., can also be arranged on the side of the extrusion plate 4 facing the battery cell cluster 9 to avoid damage caused by extrusion and scraping on the surface of the battery cell cluster 9.

[0032] One or more insulating seats 5 are arranged on the side of the extrusion plate 4 facing the battery cell cluster 9, which can prevent the current in the battery cell cluster 9 from being transmitted to the extrusion plate 4, causing danger.

[0033] Figure 1 The extrusion tooling for battery cell stacking shown is an example in one implementation manner. In this implementation manner, the first-side extrusion tooling can cooperate with the second-side extrusion tooling including only the extrusion plate 4 fixed on the workbench to complete the assembly.

[0034] Figure 2 and Figure 3 shows Figure 1 the specific structure of the sliding mechanism 2 in. The sliding mechanism 2 includes a sliding component 21. Refer to Figure 1 , and a sliding component 21 is respectively arranged on both sides of the fixed seat 1. The two sliding components 21 are symmetrically arranged about the center line of the fixed seat 1. The sliding track 211 of the sliding component 21 is fixed on the fixed seat 1. A sliding seat 212 is arranged on the sliding track 211. A sliding groove for cooperating with the sliding track 211 is arranged at the bottom of the sliding seat 212, so that the sliding seat 212 can slide on the sliding track 211. A sliding member 213 that slides with the sliding seat 212 is also arranged on the sliding seat 212. The pressing plate 4 is fixed on the two sliding members 213. When the sliding seat 212 slides on the sliding track 211, it can drive the pressing plate 4 to move, making a movement closer to and farther from the battery cell cluster 9. By setting the sliding seat 212 to connect the sliding member 213, it is convenient to replace the sliding members 213 with different sizes and dimensions.

[0035] Figure 4 shows Figure 1 the specific structure of the telescopic mechanism 3 in. The telescopic mechanism 3 includes a cylinder seat 31 and a cylinder machine 32. The cylinder seat 31 is fixed on the fixed seat 1 and is located between the two sliding seats 212. The cylinder machine 32 is fixed on the cylinder seat 31, so that the piston rod of the cylinder machine 32 faces the pressing plate 4. In order to prevent the piston rod from directly acting on the pressing plate 4 and damaging the pressing plate 4, a connecting block 33 can be arranged on the piston rod, and the connecting block 33 is connected to the pressing plate 4, so that the acting force of the piston rod on the pressing plate is more uniform. When the cylinder machine 32 works, the piston rod expands and contracts, thereby driving the pressing plate 4 to slide along the sliding track 211 and squeezing the battery cell cluster 9. Since the cylinder machine 32 is steplessly adjustable, the battery cell cluster 9 can be squeezed into a required fixed size through the cylinder machine 32, making it more convenient to bundle the battery cell cluster 9 in the next step.

[0036] Figure 5 shows Figure 1 the specific structure of the fixed seat 1 in. The fixed seat 1 includes a first fixed seat 11 and a second fixed seat 12. The fixed seat 1 is divided into two parts. The first fixed seat 11 is used to fix the entire extrusion tooling to the workbench 6 for connection. The sliding track 211 and the cylinder seat 31 are fixed on the second fixed seat 12. In this way, the structural functions are clearly divided, which is convenient for replacing each component. The second fixed seat 12 is arranged in the middle of the first fixed seat 11, which is convenient for the second fixed seat 12 to be installed on the first fixed seat 11, and is convenient for the pressing plate 4 to be located in the middle of the battery cell cluster 9 when squeezing the battery cell cluster 9, making the force more uniform.

[0037] A connecting rib plate 7 is provided at the connection between the first fixed seat 11 and the second fixed seat 12. The connecting rib plate 7 is connected to the first fixed seat 11 and the second fixed seat 12 respectively, strengthening the connection between the first fixed seat 11 and the second fixed seat 12.

[0038] A plurality of weight-reducing holes 8 are provided in the second fixed seat 12 to reduce the weight of the second fixed seat 12 itself, facilitating the assembly of the fixed seat. These weight-reducing holes 8 are located at positions on the second fixed seat 12 where there are no fixing components.

[0039] The working process of the extrusion tooling is described below in combination with the above extrusion tooling of the present utility model:

[0040] When it is necessary to extrude the stacked battery cell clusters 9, place the above extrusion tooling on one side in the thickness direction of the battery cell clusters 9, and lean the other side of the battery cell clusters 9 against the baffle. The baffle is used to limit the movement of the battery cell clusters 9 when the extrusion tooling extrudes the battery cell clusters 9. Then, start the cylinder machine 32 of the extrusion tooling to work. The telescopic rod of the cylinder machine 32 extends, pushing the extrusion plate 4 to slide along the sliding track 211 to extrude the battery cell clusters 9.

[0041] Embodiment 2:

[0042] Reference Figure 6 , an extrusion device for battery cell stacking, includes a first-side extrusion tooling and a second-side extrusion tooling arranged opposite to each other. The first-side extrusion tooling includes a fixed seat 1, a sliding mechanism 2, a telescopic mechanism 3, and an extrusion plate 4. The sliding mechanism 2 and the telescopic mechanism 3 are fixed on the fixed seat 1. Among them, the sliding mechanism 2 includes two sliding components 21. The two sliding components 21 are symmetrically arranged about the center line of the fixed seat 1. The sliding track 211 of the sliding component 21 is fixed on the fixed seat 1. A sliding seat 212 is provided on the sliding track 211, and a sliding member 213 that slides with the sliding seat 212 is further provided on the sliding seat 212. The extrusion plate 4 is fixed on the sliding member 213; the telescopic mechanism 3 includes a cylinder seat 31 and a cylinder machine 32. The cylinder seat 31 is fixed on the fixed seat 1, the cylinder machine 32 is fixed on the cylinder seat 31, a connecting block 33 is provided on the piston rod of the cylinder machine 32, and is connected to the extrusion plate 4 through the connecting block 33. Start the cylinder machine 32, the piston rod extends and retracts, driving the extrusion plate 4 to slide along the sliding track 211; the fixed seat 1 includes a first fixed seat 11 and a second fixed seat 12. The first fixed seat 11 is fixed on the workbench 6, and the sliding track 211 and the cylinder seat 31 are fixed on the second fixed seat 12. The structures of the first-side extrusion tooling and the second-side extrusion tooling are the same.

[0043] Figure 6 The extrusion device for battery cell stacking shown in [] is an example in one implementation. In this implementation, the first-side extrusion tooling can cooperate with the second-side extrusion tooling fixed on the workbench correspondingly to extrude the battery cell clusters 9.

[0044] When using the extrusion device to extrude the battery cell cluster 9, place the first-side extrusion tooling and the second-side extrusion tooling on both sides of the battery cell cluster 9 in the thickness direction. At this time, the extrusion plates 4 of the first-side extrusion tooling and the second-side extrusion tooling are opposite to each other. Start the two cylinder machines 32 to work simultaneously. The telescopic rods of the cylinder machines 32 extend, pushing the extrusion plates 4 to slide along the sliding tracks 211 and extruding the battery cell cluster 9. At this time, the extrusion plates 4 of the first-side extrusion tooling and the second-side extrusion tooling are moving closer to each other and extruding the battery cell cluster 9 at the same time.

[0045] Embodiment 3:

[0046] A battery cell cluster processing system includes at least one extrusion device as described in Embodiment 2. Other devices of the battery cell cluster processing system are well known to those skilled in the art, so other devices of the processing system will not be described in detail here.

[0047] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present invention, or directly or indirectly applied to other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. An extrusion tool for stacking battery cells, comprising a fixed seat (1), a sliding mechanism (2), a telescopic mechanism (3) and an extrusion plate (4); the fixed seat (1) is provided with a sliding mechanism (2) and a telescopic mechanism (3); the characteristics are: The extrusion plate (4) is slidably connected to the fixed seat (1) via a sliding mechanism (2); the driving end of the telescopic mechanism (3) is connected to the extrusion plate (4); when the telescopic mechanism (3) is in operation, it drives the extrusion plate (4) to slide on the sliding mechanism (2) to extrude the battery cell cluster (9).

2. The extrusion tool for battery cell stacking according to claim 1, characterized in that: The sliding mechanism (2) comprises a sliding assembly (21); the sliding assembly (21) comprises a sliding track (211), a sliding seat (212) and a sliding member (213); the sliding track (211) is fixed on a fixed seat (1); a slidable sliding seat (212) is provided on the sliding track (211); a sliding member (213) is fixed on the sliding seat (212); one end of the sliding member (213) is connected to an extrusion plate (4).

3. The extrusion tool for battery cell stacking according to claim 2, characterized in that: The telescopic mechanism (3) comprises a cylinder seat (31) and a cylinder machine (32); the cylinder seat (31) is fixed with the cylinder machine (32), so that the piston rod of the cylinder machine (32) is directly or indirectly connected to the extrusion plate to drive the extrusion plate (4) to move.

4. An extrusion tool for battery cell stacking as claimed in claim 3, characterized in that: A connecting block (33) is provided on the piston rod of the cylinder machine (32); the connecting block (33) is connected to the extrusion plate (4).

5. An extrusion tool for battery cell stacking according to any one of claims 1 to 4, characterized in that: One or more insulating seats (5) are provided on the side of the extrusion plate (4) facing the battery cell cluster (9).

6. The extrusion tool for battery cell stacking according to claim 3, characterized in that: The fixing seat (1) comprises a first fixing seat (11) and a second fixing seat (12); the bottom of the first fixing seat (11) is connected to a work surface (6); the second fixing seat (12) is provided on the first fixing seat (11); the second fixing seat (12) is used to fix a sliding rail (211) and a cylinder seat (31).

7. The extrusion tool for battery cell stacking according to claim 6, characterized in that: A connecting rib plate (7) is provided between the first fixing seat (11) and the second fixing seat (12).

8. An extrusion tool for battery cell stacking according to claim 6 or 7, characterized in that: The second fixing seat (12) is provided with a weight-reducing hole (8).

9. An extrusion device for stacking battery cells, characterized in that: It comprises at least two extrusion tools as claimed in any one of claims 1 to 7, and the extrusion plates (4) of the extrusion tools are arranged opposite to each other.

10. A battery cell cluster processing system, characterized in that: Comprising at least one extrusion device as claimed in claim 9.

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