Lithium battery roller test tool

Abstract

The utility model discloses a lithium battery roller test tool which comprises a tool upper cover plate and a tool lower cover plate which are matched with each other, a battery bin is formed in the tool upper cover plate and the tool lower cover plate after the tool upper cover plate and the tool lower cover plate are matched with each other, and a movable cross beam which is used for positioning batteries of different models and can be movably adjusted in position is arranged in the battery bin. And the end part of the movable cross beam is connected with the battery compartment through a fastener. The lithium battery roller testing tool is reasonable in structural design, can be suitable for testing batteries of different models, can completely replace a customized model machine, is high in universality, can save the manufacturing period of a mold, and greatly reduces the cost.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery testing, in particular to a lithium battery roller testing tool. Background Art

[0002] With the development of intelligence, smart handheld terminals such as mobile phones, tablets, and POS machines are becoming increasingly popular and integrated into our lives, especially when it comes to the use of lithium-ion batteries, so the safety requirements for such electronic products are becoming higher and higher.

[0003] The lithium battery roller test is mainly used to evaluate the roller test capability of newly-released batches of batteries, such as the roller for lithium battery collision test disclosed in patent CN215865717U. The test is carried out using a roller. Generally, the whole machine is placed in a roller tester and rolled through the equipment to perform hundreds of drops and impact tests, and then the performance of the whole machine is checked for damage, and the whole machine's ability to resist rollers is evaluated. The purpose is to simulate life scenarios and evaluate whether the battery structure, circuit, shell and other assembly and welding areas involved in the handheld device are loose or even broken, so as to make risk judgments and improvement directions.

[0004] As a key component, the battery production process always pays attention to roller testing. However, due to the structure and size of handheld terminals, customized model prototypes are costly and time-consuming for battery manufacturers. Due to the variety of prototypes, it is impossible to conduct test comparisons and data collection at a unified level for battery products on the same platform. We hope to design and develop a universal roller test tooling with high compatibility, high reliability, simple production and low cost to replace customized model prototypes for subsequent roller tests. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides a lithium battery roller testing tool, which has high versatility and reduces costs.

[0006] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0007] The lithium battery roller testing tool comprises a matching tool upper cover plate and a tool lower cover plate, wherein the tool upper cover plate and the tool lower cover plate cooperate to form a battery compartment inside, wherein a movable crossbeam is provided in the battery compartment for positioning batteries of different models and for movable adjustment, and the end of the movable crossbeam is connected to the battery compartment by a fastener.

[0008] Further:

[0009] The tooling upper cover plate and the tooling lower cover plate are both aluminum cover plates or high-molecular polyester cover plates.

[0010] The thickness of the tooling upper cover plate and the tooling lower cover plate is 0.2-1.0 mm.

[0011] The tooling upper cover plate and the tooling lower cover plate are both square cover plates, and fixing holes are arranged at the four corners of the cover plates, and a connecting hole is arranged in the middle.

[0012] A circle of square ribs is arranged on the inner surface of the tooling lower cover plate, and a battery compartment is formed inside the circle of square ribs.

[0013] The movable crossbeam is arranged in a circle of square ribs, and a group of positioning holes are arranged on the ribs corresponding to the ends of the movable crossbeam.

[0014] The battery compartment is provided with a hard rubber or silicone pad for filling and positioning the battery.

[0015] Compared with the prior art, the utility model has the following advantages:

[0016] The lithium battery roller test tooling has a reasonable structural design and can be used to test batteries of different models. The test tooling can completely replace customized model prototypes and has high versatility. It can not only save the mold production cycle but also greatly reduce its cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following is a brief description of the contents and symbols in the drawings of this specification:

[0018] Figure 1 This is a schematic diagram of the tooling structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the tooling dimensions of the utility model.

[0020] In the figure:

[0021] 1. Upper cover of tooling, 2. Lower cover of tooling, 3. Moving beam, 4. Battery compartment. DETAILED DESCRIPTION

[0022] The specific implementation of the utility model will be further explained in detail below through the description of embodiments with reference to the accompanying drawings.

[0023] like Figure 1 and Figure 2 As shown, the lithium battery roller test tool comprises a matching tool upper cover 1 and a tool lower cover 2. When the tool upper cover and the tool lower cover are matched, a battery compartment 4 is formed inside. A movable beam 3 is provided in the battery compartment for positioning batteries of different models and can be moved and adjusted. The end of the movable beam is connected to the battery compartment by fasteners.

[0024] The tooling upper cover plate and the tooling lower cover plate are both aluminum cover plates or high-molecular polyester cover plates; the thickness of the tooling upper cover plate and the tooling lower cover plate is 0.2-1.0mm; they are light in weight and easy to manufacture.

[0025] The tooling upper cover plate and the tooling lower cover plate are both square cover plates, with fixing holes at the four corners of the cover plate and a connecting hole in the middle; the tooling upper cover plate and the tooling lower cover plate are fixed by screws and the fixing holes, and the assembly is simple.

[0026] A circle of square ribs is provided on the inner surface of the lower cover of the tooling, and a battery compartment is formed in the circle of square ribs. The movable crossbeam is provided in the circle of square ribs, and a group of positioning holes are provided on the ribs corresponding to the ends of the movable crossbeam; the position of the crossbeam can be adjusted to test different types of batteries. The test tooling can completely replace customized model prototypes, with high versatility, which can not only save the mold production cycle, but also greatly reduce its cost.

[0027] After the crossbeam is moved to adjust the position, it is positioned by cooperating with the corresponding positioning holes through screws, which is easy to operate; further, a hard rubber or silicone pad for filling and positioning the battery is provided in the battery compartment.

[0028] The preferred embodiments of the present invention are:

[0029] The utility model designs the following by analyzing the size, fixing method and other parameters of the model prototype Figure 1 The tooling comprises a tooling upper cover plate 1, a tooling lower cover plate 2, a movable crossbeam 3, and a formed battery compartment 4, with a screw fixing position at each of the four corners and two screw fixing positions in the middle.

[0030] Aluminum is generally selected as the material. After forming, the wall thickness of the upper cover and the lower cover is generally 0.2-1.0mm. Some polymer polyester materials, bakelite and other materials can also be selected; fixing screws use m3 size; the overall size of the tooling is compatible with the battery product specifications, with a thickness of 10.0mm±0.2mm, a width of 80.0mm±1.0mm, and a length of 170.0mm±1.0mm; the internal battery compartment size is 66.0mm±1.0mm in width and adjustable in four gears, with a maximum of 120.0mm±1.0mm and a minimum of 50.0mm±1.0mm; the width and thickness of the battery compartment are fixed. When the battery size is smaller than the above size, it needs to be filled with hard rubber or silicone pads.

[0031] During the test, batteries are randomly selected from the offline line for full charging. The batteries are fixed in the battery compartment with easy-to-pull adhesive on the back. The positive and negative pole ears are insulated and then fixed under the movable crossbeam without looseness. In terms of width and thickness, hard silicone pads of fixed difference sizes are needed for filling and the test is started.

[0032] Implementation Cases:

[0033] Battery model A selects 4.40V voltage 705276, capacity 4700mAh and model B selects 4.40V voltage 735079, capacity 5000mAh. The two battery material systems are exactly the same, only the appearance size is different.

[0034] Comparison group - Model A battery:

[0035] 1. Add 97% lithium cobalt oxide positive electrode powder, 1% conductive carbon tube, 2% polyvinylidene fluoride, etc. into a stirring tank, then add N-methylpyrrolidone solvent, and then stir at high speed to make positive electrode slurry;

[0036] 2. Coat the positive electrode slurry described in step 1 on aluminum foil and bake the electrode at 90-110°C;

[0037] 3. Transfer the positive electrode sheet dried in step 2 to the roller pressing process for cold pressing;

[0038] 4. Transfer the cold pressed electrode in step 3 to the slitting process for electrode stripping;

[0039] 5. The coiled material cut and produced in step 4 is transferred to the welding process, and welding is performed using 100um thick tabs;

[0040] 6. Transfer the pole piece prepared in step 5 to the winding process;

[0041] 7. The components are 96% graphite negative electrode powder, 1% conductive carbon black, 1.5% sodium carboxymethyl cellulose, 1.5%

[0042] Styrene-butadiene rubber is added into a stirring tank, and then deionized water is added, and then stirred at a high speed to prepare a negative electrode slurry;

[0043] 8. Coat the negative electrode slurry described in step 7 on the copper foil and bake the electrode at 80-100°C;

[0044] 9. According to the above process route, the negative electrode is rolled, striped, and the tabs are welded to produce the negative electrode;

[0045] 10. The prepared positive and negative electrode sheets and the purchased finished isolation film are used to complete the preparation of the bare battery cell on the winding machine, and the battery winding end is pasted with 15mm*22um conventional green glue;

[0046] 11. The bare battery cell prepared in step 10 and the formed aluminum-plastic film are packaged into a shell;

[0047] 12. Inkjet the battery cells packaged in step 11 and bake at 85°C for 10 hours;

[0048] 13. Complete battery cell filling, formation, high temperature aging, molding and capacity testing;

[0049] 14. Extract 20ea battery and fully charge it;

[0050] Using a customized model prototype, after fixing the fully charged battery, a roller test was performed, with a setting height of 0.5m, a speed of 5r / min, and 1000 rotations.

[0051] Experimental Group 1 - Model A Batteries:

[0052] 1. Add 97% lithium cobalt oxide positive electrode powder, 1% conductive carbon tube, 2% polyvinylidene fluoride, etc. into a stirring tank, then add N-methylpyrrolidone solvent, and then stir at high speed to make positive electrode slurry;

[0053] 2. Coat the positive electrode slurry described in step 1 on aluminum foil and bake the electrode at 90-110°C;

[0054] 3. Transfer the positive electrode sheet dried in step 2 to the roller pressing process for cold pressing;

[0055] 4. Transfer the cold pressed electrode in step 3 to the slitting process for electrode stripping;

[0056] 5. The coiled material cut and produced in step 4 is transferred to the welding process, and welding is performed using 100um thick tabs;

[0057] 6. Transfer the pole piece prepared in step 5 to the winding process;

[0058] 7. Add 96% graphite negative electrode powder, 1% conductive carbon black, 1.5% sodium carboxymethyl cellulose, and 1.5% styrene-butadiene rubber into a stirring tank, add deionized water, and then stir at high speed to prepare negative electrode slurry;

[0059] 8. Coat the negative electrode slurry described in step 7 on the copper foil and bake the electrode at 80-100°C;

[0060] 9. According to the above process route, the negative electrode is rolled, striped, and the tabs are welded to produce the negative electrode;

[0061] 10. The prepared positive and negative electrode sheets and the purchased finished isolation film are used to complete the preparation of the bare battery cell on the winding machine, and the end of the battery winding is pasted with 15*22um high-viscosity hot melt adhesive;

[0062] 11. The bare battery cell prepared in step 10 and the formed aluminum-plastic film are packaged into a shell;

[0063] 12. Inkjet the battery cells packaged in step 11 and bake at 85°C for 10 hours;

[0064] 13. Complete battery cell filling, formation, high temperature aging, molding and capacity testing;

[0065] 14. Extract 20ea battery and fully charge it;

[0066] 15. Use the customized model prototype to post the easy-to-pull adhesive on the fully charged batteries in sequence, adjust the movable beam to fix the pole ears, and then perform the roller test, setting the height to 0.5m, the speed to 5r / min, and rotate 1000 times.

[0067] Experimental Group 2 - Model A Batteries:

[0068] 1. Add 97% lithium cobalt oxide positive electrode powder, 1% conductive carbon tube, 2% polyvinylidene fluoride, etc. into a stirring tank, then add N-methylpyrrolidone solvent, and then stir at high speed to make positive electrode slurry;

[0069] 2. Coat the positive electrode slurry described in step 1 on aluminum foil and bake the electrode at 90-110°C;

[0070] 3. Transfer the positive electrode sheet dried in step 2 to the roller pressing process for cold pressing;

[0071] 4. Transfer the cold pressed electrode in step 3 to the slitting process for electrode stripping;

[0072] 5. The coiled material cut and produced in step 4 is transferred to the welding process, and welding is performed using 100um thick tabs;

[0073] 6. Transfer the pole piece prepared in step 5 to the winding process;

[0074] 7. Add 96% graphite negative electrode powder, 1% conductive carbon black, 1.5% sodium carboxymethyl cellulose, and 1.5% styrene-butadiene rubber into a stirring tank, add deionized water, and then stir at high speed to prepare negative electrode slurry;

[0075] 8. Coat the negative electrode slurry described in step 7 on the copper foil and bake the electrode at 80-100°C;

[0076] 9. According to the above process route, the negative electrode is rolled, striped, and the tabs are welded to produce the negative electrode;

[0077] 10. The prepared positive and negative electrode sheets and the purchased finished isolation film are used to complete the preparation of bare cells on the winding machine, and the end of the battery winding is pasted with 15*22um conventional green glue;

[0078] 11. The bare battery cell prepared in step 10 and the formed aluminum-plastic film are packaged into a shell;

[0079] 12. Inkjet the battery cells packaged in step 11 and bake at 85°C for 10 hours;

[0080] 13. Complete battery cell filling, formation, high temperature aging, molding and capacity testing;

[0081] 14. Extract 20ea battery and fully charge it;

[0082] 15. Use the test fixture to post the easy-to-pull adhesive on the fully charged batteries in sequence, adjust the movable beam to fix the pole ears, and then perform the roller test, setting the height to 0.5m, the speed to 5r / min, and rotate 1000 times.

[0083] Experimental Group 3 - Model A Batteries:

[0084] 1. Add 97% lithium cobalt oxide positive electrode powder, 1% conductive carbon tube, 2% polyvinylidene fluoride, etc. into a stirring tank, then add N-methylpyrrolidone solvent, and then stir at high speed to make positive electrode slurry;

[0085] 2. Coat the positive electrode slurry described in step 1 on aluminum foil and bake the electrode at 90-110°C;

[0086] 3. Transfer the positive electrode sheet dried in step 2 to the roller pressing process for cold pressing;

[0087] 4. Transfer the cold pressed electrode in step 3 to the slitting process for electrode stripping;

[0088] 5. The coiled material cut and produced in step 4 is transferred to the welding process, and welding is performed using 100um thick tabs;

[0089] 6. Transfer the pole piece prepared in step 5 to the winding process;

[0090] 7. Add 96% graphite negative electrode powder, 1% conductive carbon black, 1.5% sodium carboxymethyl cellulose, and 1.5% styrene-butadiene rubber into a stirring tank, add deionized water, and then stir at high speed to prepare negative electrode slurry;

[0091] 8. Coat the negative electrode slurry described in step 7 on the copper foil and bake the electrode at 80-100°C;

[0092] 9. According to the above process route, the negative electrode is rolled, striped, and the tabs are welded to produce the negative electrode;

[0093] 10. The prepared positive and negative electrode sheets and the purchased finished isolation film are used to complete the preparation of the bare battery cell on the winding machine, and the end of the battery winding is pasted with 15*22um high-viscosity hot melt adhesive;

[0094] 11. The bare battery cell prepared in step 10 and the formed aluminum-plastic film are packaged into a shell;

[0095] 12. Inkjet the battery cells packaged in step 11 and bake at 85°C for 10 hours;

[0096] 13. Complete battery cell filling, formation, high temperature aging, molding and capacity testing;

[0097] 14. Extract 20ea battery and fully charge it;

[0098] 15. Use the test fixture to post the easy-to-pull adhesive on the fully charged batteries in sequence, adjust the movable beam to fix the pole ears, and then perform the roller test, setting the height to 0.5m, the speed to 5r / min, and rotate 1000 times.

[0099] Experimental Group 4 - Model B Batteries:

[0100] 1. Add 97% lithium cobalt oxide positive electrode powder, 1% conductive carbon tube, 2% polyvinylidene fluoride, etc. into a stirring tank, then add N-methylpyrrolidone solvent, and then stir at high speed to make positive electrode slurry;

[0101] 2. Coat the positive electrode slurry described in step 1 on aluminum foil and bake the electrode at 90-110°C;

[0102] 3. Transfer the positive electrode sheet dried in step 2 to the roller pressing process for cold pressing;

[0103] 4. Transfer the cold pressed electrode in step 3 to the slitting process for electrode stripping;

[0104] 5. The coiled material cut and produced in step 4 is transferred to the welding process, and welding is performed using 100um thick tabs;

[0105] 6. Transfer the pole piece prepared in step 5 to the winding process;

[0106] 7. Add 96% graphite negative electrode powder, 1% conductive carbon black, 1.5% sodium carboxymethyl cellulose, and 1.5% styrene-butadiene rubber into a stirring tank, add deionized water, and then stir at high speed to prepare negative electrode slurry;

[0107] 8. Coat the negative electrode slurry described in step 7 on the copper foil and bake the electrode at 80-100°C;

[0108] 9. According to the above process route, the negative electrode is rolled, striped, and the tabs are welded to produce the negative electrode;

[0109] 10. The prepared positive and negative electrode sheets and the purchased finished isolation film are used to complete the preparation of the bare battery cell on the winding machine, and the end of the battery winding is pasted with 15*22um high-viscosity hot melt adhesive;

[0110] 11. The bare battery cell prepared in step 10 and the formed aluminum-plastic film are packaged into a shell;

[0111] 12. Inkjet the battery cells packaged in step 11 and bake at 85°C for 10 hours;

[0112] 13. Complete battery cell filling, formation, high temperature aging, molding and capacity testing;

[0113] 14. Extract 20ea battery and fully charge it;

[0114] 15. Use the test fixture to post the easy-to-pull adhesive on the fully charged batteries in sequence, adjust the movable beam to fix the pole ears, and then perform the roller test, setting the height to 0.5m, the speed to 5r / min, and rotate 1000 times.

[0115] The test results of the above four groups of batteries are shown in the table below:

[0116]

[0117] By comparing experimental groups 1-3 with the control group, it was found that when the models were the same but the types of adhesives were different, the detection rates of the customized model prototype and the homemade test tooling were comparable. By comparing Experiment 3 and Experiment 4, the two batteries were basically the same in design, and their test detection rates were also comparable.

[0118] The above is only an explanation of the preferred embodiments of the present invention. The above technical features can be arbitrarily combined to form multiple embodiments of the present invention.

[0119] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various non-substantial improvements are made using the concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A lithium battery drum testing tool, characterized in that: It includes a matching tooling upper cover plate and a tooling lower cover plate, which form a battery compartment inside after matching. A movable crossbeam is provided in the battery compartment for positioning batteries of different models and can be moved and adjusted. The end of the movable crossbeam is connected to the battery compartment by a fastener.

2. The lithium battery drum testing tool as claimed in claim 1, characterized in that: The tooling upper cover plate and the tooling lower cover plate are both aluminum cover plates or high-molecular polyester cover plates.

3. The lithium battery drum testing tool as claimed in claim 1, characterized in that: The thickness of the tooling upper cover plate and the tooling lower cover plate is 0.2-1.0 mm.

4. The lithium battery drum testing tool as claimed in claim 1, characterized in that: The tooling upper cover plate and the tooling lower cover plate are both square cover plates, and fixing holes are arranged at the four corners of the cover plates, and a connecting hole is arranged in the middle.

5. The lithium battery drum testing tool as claimed in claim 4, characterized in that: A circle of square ribs is arranged on the inner surface of the tooling lower cover plate, and a battery compartment is formed inside the circle of square ribs.

6. The lithium battery drum testing tool as claimed in claim 5, characterized in that: The movable crossbeam is arranged in a circle of square ribs, and a group of positioning holes are arranged on the ribs corresponding to the ends of the movable crossbeam.

7. The lithium battery drum testing tool as claimed in claim 5, characterized in that: The battery compartment is provided with a hard rubber or silicone pad for filling and positioning the battery.

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