A kind of integrated tool for detecting and welding after lithium battery module is boxed

Abstract

The utility model discloses a kind of detection and welding integration tool suitable for lithium battery module after entering box, belong to lithium battery cell assembly field.A kind of detection and welding integration tool suitable for lithium battery module after entering box, comprising: support frame;Multiple intermediate baffle for shielding FPC, set on the support frame, and the outer edge of the support frame is equipped with positioning part, and the positioning part is used to position entire support frame;The utility model can effectively prevent welding slag from splashing on FPC and electrical components in Pack battery box during welding process by intermediate baffle cooperation with let -go slot shielding and apron shielding front cabin, simultaneously, intermediate baffle can play detection purpose, prevent affecting subsequent BSB welding, improve the qualified rate of product, this mechanism can cope with current new energy development trend (CTP and CTC direction).

Description

Technical Field

[0001] This utility model relates to the field of lithium battery cell assembly technology, and in particular to an integrated tooling for testing and welding lithium battery modules after they are placed in a box. Background Technology

[0002] Laser welding of the cell electrodes is crucial in the lithium battery pack assembly process.

[0003] In the past, traditional module stacking, module packaging, module cover welding, and module boxing all involved separate testing and welding processes. Each process required the transfer of modules, resulting in a long production process, increased costs for tooling and materials, and increased labor costs, which negatively impacted production efficiency.

[0004] A new integrated method for the inspection and welding of lithium battery modules after they are placed in the battery pack is adopted. After all the cells are placed in the pack and pass the inspection, the terminals are flattened using a terminal shaping fixture and then placed in an integrated cover plate (FPC). The cells are then laser welded inside the battery pack to achieve a lean production process, improve product qualification rate, effectively detect failure modes, improve production efficiency, reduce production costs, and increase the energy density of the entire battery pack. After adopting this new method, it is necessary to combine it with an integrated fixture for the inspection and welding of lithium battery modules after they are placed in the pack. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an integrated tooling for testing and welding lithium battery modules after they are placed in the box, which can overcome the above problems or at least partially solve the above problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An integrated tooling for testing and welding lithium battery modules after they are placed in a box includes: a support frame; multiple intermediate baffles for shielding the FPC, which are disposed on the support frame, and a positioning part is provided on the outer edge of the support frame for positioning the entire support frame.

[0008] In a preferred embodiment of the present invention, the support frame includes at least one intermediate crossbeam and two side crossbeams, wherein both side crossbeams are detachably connected to the intermediate crossbeam.

[0009] In a preferred embodiment of the present invention, the positioning part includes at least two guide blocks disposed on the side crossbeam, and the guide blocks are engaged with the battery module inside the Pack battery box.

[0010] In a preferred embodiment of this utility model, the intermediate baffle is provided with a plurality of clearance grooves corresponding to the battery module terminals.

[0011] In a preferred embodiment of this utility model, at least two handles are provided on the side crossbeam.

[0012] In a preferred embodiment of the present invention, one end of each of the two side crossbeams is provided with a baffle for shielding the front compartment of the Pack battery box.

[0013] In a preferred embodiment of the present invention, a pad is detachably connected between the baffle and the side beam.

[0014] In a preferred embodiment of the present invention, a plurality of positioning grooves are provided on the intermediate crossbeam.

[0015] Compared with the prior art, this utility model provides an integrated tooling for the inspection and welding of lithium battery modules after they are placed in the box, which has the following advantages:

[0016] 1. This integrated fixture is suitable for the inspection and welding of lithium battery modules after they are placed in the battery pack. The battery cells are stacked sequentially outside the battery pack. After stacking, the stacked cells are clamped by grippers and pressed to a certain size. Then, a suction cup holder is used to pick up the cells and place them between the crossbeams inside the battery pack. A terminal leveling fixture is used to level the terminals of the cells after they are placed in the pack to ensure the flatness of the terminals. A CCD camera is used to take pictures and measure distances, and coordinate values ​​are recorded. Laser welding compensation is then performed. Finally, the integrated inspection and welding fixture is installed on the battery module and positioned using a positioning part. At this time, the position of the battery module is compared with the edge of multiple intermediate baffles, which allows for a more intuitive observation of the placement direction of the battery module after it is placed in the pack, preventing it from affecting subsequent BSB welding and improving the product qualification rate. This mechanism can meet the current development trend of new energy (CTP and CTC).

[0017] 2. This integrated tooling is suitable for the inspection and welding of lithium battery modules after they are placed in the battery pack. The intermediate baffle can prevent welding slag from splashing onto the FPC. Combined with the method of welding the integrated cover plate after the lithium battery is placed in the battery pack, it can shorten the production process, improve production efficiency, and reduce production costs. The clearance groove is designed to cooperate with the terminal posts on the battery module to provide all-round shielding of the battery module. This can effectively prevent welding slag from splashing onto the FPC and electrical components inside the battery pack during the welding process. The clearance groove can also serve as a comparison tool to achieve the purpose of inspection.

[0018] 3. This integrated tooling is suitable for the inspection and welding of lithium battery modules after they are placed in the box. The baffle can shield the front compartment of the battery pack to prevent welding slag from splashing into the front compartment of the battery pack and damaging the electrical components.

[0019] The parts of this device not described herein are the same as or can be implemented using existing technologies. This utility model uses a middle baffle bar in conjunction with a clearance groove for shielding and a baffle plate to shield the front compartment, which can effectively prevent welding slag from splashing onto the FPC and electrical components inside the Pack battery box during the welding process. At the same time, the middle baffle bar can serve as a detection tool to prevent it from affecting subsequent BSB welding and improve the product qualification rate. This mechanism can address the current development trend of new energy (CTP and CTC directions). Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is the front view of the present invention;

[0022] Figure 3 This is the left view of the present invention;

[0023] Figure 4 This is a schematic diagram of the unfolded structure of this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the intermediate baffle in this utility model;

[0025] Figure 6 This is a schematic diagram of the Pack battery box used in this utility model.

[0026] In the diagram: 1. Central crossbeam; 101. Positioning groove; 2. Central stop bar; 201. Clearance groove; 3. Side crossbeam; 4. Baffle; 5. Pad; 6. Guide block; 7. Handle; 8. Pack battery box; 9. Front compartment. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0028] Example 1: Refer to Figures 1-4 An integrated tooling for testing and welding lithium battery modules after they are placed in a box, comprising: a support frame;

[0029] The support frame can be a quadrilateral or U-shaped structure, and multiple sides can be integrally formed or detachably connected multiple plate structures. The plate structures need to be made of metal or acrylic materials with a certain supporting strength.

[0030] In a preferred embodiment, refer to Figure 4 The support frame includes at least one intermediate crossbeam 1 and two side crossbeams 3, wherein the two side crossbeams 3 are detachably connected to the intermediate crossbeam 1. In specific use, the intermediate crossbeam 1 and the side crossbeams 3 of appropriate length can be selected and combined according to the applicable situation to complete the matching of battery modules in different Pack battery boxes 8.

[0031] The outer edge of the support frame is provided with a positioning part, which is used to position the entire support frame. The positioning part is mainly used to position the entire support frame. The positioning part can be a fixing block with an L-shaped surface on the lower end to hold the battery module. Alternatively, a chamfer can be provided at the entry end to facilitate installation.

[0032] In a preferred embodiment, refer to Figure 2 The positioning part includes at least two guide blocks 6 set on the side crossbeam 3. The guide blocks 6 are snapped onto the battery module inside the Pack battery box 8. The guide blocks 6 can be installed by welding or bolting. They can be set symmetrically or asymmetrically. They are mainly used to fit with the outside of the battery module to complete the installation of the entire tooling. The installation of the tooling with precision can improve the accuracy of the battery module position detection.

[0033] In order to perform multi-dimensional comparative detection of the battery module in the X, Y, and Z directions, multiple intermediate baffles 2 used to block the FPC are set on the support frame.

[0034] During the lithium battery pack assembly process, the battery cells are stacked sequentially outside the battery pack 8. After stacking, the stacked battery cells are clamped by grippers and subjected to a certain pressure. Then, the battery cells are picked up by a suction cup and placed between the crossbeams inside the battery pack 8. The terminal post leveling fixture is used to level the terminal posts of the battery cells after they enter the pack to ensure the flatness of the terminal posts. CCD is used to take pictures and measure distances, record coordinate values, and perform laser welding compensation. Then, the integrated welding fixture of the inspection machine is installed on the battery module and positioned using the positioning part. At this time, the position of the battery module after entering the pack can be more intuitively observed by comparing the edges of multiple intermediate baffles 2 with the battery module, preventing it from affecting the subsequent BSB welding and improving the product qualification rate. This mechanism can cope with the current new energy development trend (CTP and CTC direction).

[0035] After the final inspection, if the inspection is qualified, the electrode sheet is welded to the cell cover plate using a laser welding machine. During the welding process, the intermediate baffle 2 can prevent welding slag from splashing onto the FPC. In addition, the use of the integrated cover plate (FPC) welding method after the lithium battery is put into the box can shorten the production process, improve production efficiency, and reduce production costs.

[0036] Finally, CCD imaging is used to check for defects such as misalignment, missing solder joints, burrs, etc.

[0037] In addition, in the specific implementation method, refer to Figure 5 The middle baffle 2 is provided with multiple sets of clearance grooves 201 corresponding to the battery module terminals;

[0038] Reference Figure 6 The clearance groove 201 is designed to cooperate with the terminal posts on the battery module to provide all-round shielding for the battery module. This can effectively prevent welding slag from splashing onto the FPC and the electrical components inside the Pack battery box 8 during the welding process. In addition, the clearance groove 201 can also serve as a comparison tool to achieve the purpose of testing.

[0039] To facilitate the handling of the entire tooling, the following implementation method can also be adopted: at least two handles 7 are provided on the side beam 3 to facilitate operation by the staff.

[0040] In another embodiment, one end of each of the two side beams 3 is provided with a baffle 4 for shielding the front compartment 9 of the Pack battery box 8.

[0041] The baffle 4 can shield the front compartment 9 of the Pack battery box 8 to prevent welding slag from splashing into the front compartment 9 of the Pack battery box 8 and causing damage to electrical components.

[0042] In a preferred embodiment, a pad 5 is detachably connected between the baffle 4 and the side crossbeam 3. The height of the baffle 4 can be changed by selecting pads 5 of different thicknesses, which is suitable for the front compartment 9 of different types of battery packs 8.

[0043] Multiple positioning grooves 101 are provided on the middle crossbeam 1.

[0044] The intermediate stop bar 2 is installed by bolts passing through the intermediate stop bar 2 and the positioning groove 101, and by nuts. The positioning groove 101 is rectangular, which also allows for fine adjustment of the position of the intermediate stop bar 2.

[0045] The method described in the above embodiments is applicable to the integrated tooling for testing and welding lithium battery modules after they are placed in the box.

[0046] A new method for integrated testing and welding of lithium battery modules after they are packaged in a box mainly includes the following steps:

[0047] S1. External stacking of battery cells: Detect the stacking polarity of the modules and use stacking fixtures to ensure the flatness and length and width dimensions of the modules;

[0048] S2, Module insertion: First, use the clamps to clamp the stacked cells and press them to a certain size. Then, use a suction cup to pick up the cells and place them between the 8 crossbeams of the Pack battery box. Cell terminal leveling: Use a terminal leveling fixture to level the cells after they are inserted into the box to ensure the flatness of the terminals.

[0049] S3. Module box entry inspection: Use tooling to check the orientation of the machine after the module is placed in the box, and check the accuracy of the X, Y and Z axes after the module is placed in the box.

[0050] S4. Cell electrode flatness inspection: Use CCD to take pictures and measure distances, record coordinate values, and perform laser welding compensation;

[0051] S5. Battery cover plate (FPC) laser welding: The electrode sheet is welded to the battery cover plate using a laser welding machine;

[0052] S6. Post-weld inspection: Use CCD imaging to inspect for misalignment, missing welds, burrs, and other defects.

[0053] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An integrated tooling for the inspection and welding of lithium battery modules after they are placed in a box, characterized in that, include: Supporting framework; Multiple intermediate baffles (2) for shielding the FPC are provided on the support frame, and the outer edge of the support frame is provided with a positioning part for positioning the entire support frame.

2. The integrated tooling for testing and welding lithium battery modules after they are placed in the casing, as described in claim 1, is characterized in that... The support frame includes at least one intermediate crossbeam (1) and two side crossbeams (3), wherein both side crossbeams (3) are detachably connected to the intermediate crossbeam (1).

3. The integrated tooling for testing and welding lithium battery modules after they are placed in the casing, as described in claim 2, is characterized in that... The positioning part includes at least two guide blocks (6) disposed on the side crossbeam (3), and the guide blocks (6) are engaged with the battery module inside the Pack battery box (8).

4. The integrated tooling for testing and welding lithium battery modules after they are placed in the box, as described in claim 1, is characterized in that... The middle baffle (2) is provided with multiple sets of clearance slots (201) corresponding to the battery module terminals.

5. The integrated tooling for testing and welding lithium battery modules after they are placed in the casing, as described in claim 2, is characterized in that... At least two handles (7) are provided on the side crossbeam (3).

6. The integrated tooling for testing and welding lithium battery modules after they are placed in the casing, as described in claim 2, is characterized in that... One end of each of the two side beams (3) is provided with a baffle (4) for shielding the front compartment (9) of the Pack battery box (8).

7. The integrated tooling for testing and welding lithium battery modules after they are placed in a box, as described in claim 6, is characterized in that... A pad (5) is detachably connected between the baffle (4) and the side beam (3).

8. The integrated tooling for testing and welding lithium battery modules after they are placed in the casing, as described in claim 2, is characterized in that... Multiple positioning grooves (101) are provided on the middle crossbeam (1).

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