Insulation device
By designing an insulation device to cover, insulate, and limit the cell wafers, the problems of resource waste and abnormal test data were solved, and safe and efficient cell testing was achieved.
Patent Information
- Application Number
- CN202520242035.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-14
- Publication Date
- 2025-11-28
- Estimated Expiration
- 2035-02-14
AI Technical Summary
In the existing technology, the use of insulating blue film or tape for cell insulation results in resource waste, residual adhesive residue affecting test data and safety issues, and cannot guarantee cell safety during testing.
Design an insulation device including an insulation body and a limiting member. By setting a clearance groove and a limiting plate, the device covers, insulates and limits the contact of the contact plate to prevent short circuits caused by contact, and can be reused.
It achieves effective insulation and limiting of the pads, reduces resource waste, avoids short circuit risks, improves test accuracy and efficiency, and reduces test costs.
Smart Images
Figure CN223612644U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to battery technology field, specifically, relate to an insulating device. BACKGROUND
[0002] At present, the conventional use method of insulating the baffle of the battery cell is to cover and insulate the baffle by using insulating blue film or insulating adhesive, so that the positive and negative baffle of the battery cell will not be short-circuited and spark during the transfer and storage process.
[0003] However, the method of covering the baffle of the battery cell with insulating blue film or insulating adhesive has the following disadvantages: 1. The insulating blue film and the insulating adhesive tape are disposable products and cannot be reused, resulting in waste of resources; 2. The insulating blue film and the insulating adhesive tape will leave adhesive marks on the baffle, which will increase the connection resistance during the battery cell test process, resulting in abnormal temperature rise during the battery cell test process, abnormal battery cell test data, and the need for multiple retesting and verification, wasting test resources. Therefore, after removing the insulating blue film and the insulating adhesive tape, the residual adhesive marks need to be polished, wasting human resources and affecting the test period; 3. The insulating blue film and the insulating adhesive tape need to be removed during the test process, which cannot guarantee the safety of the battery cell during the test process. SUMMARY
[0004] The purpose of the utility model includes providing an insulating device which can cover and insulate the baffle and can be recycled, reducing resource waste.
[0005] The embodiments of the utility model can be implemented as follows:
[0006] In a first aspect, the utility model provides an insulating device for limiting the baffle, the top cover is provided with a pole, the baffle is arranged on the pole, and a gap is arranged between the baffle and the top cover.
[0007] The insulating device comprises an insulating body and a limiting piece, a gap is arranged on the first end of the insulating body, so that the pole can pass through the gap, the insulating body is arranged in the gap, and the limiting piece limits the first end of the baffle to the first end of the insulating body.
[0008] In an optional embodiment, the second end of the insulating body is in limiting connection with the second end of the baffle.
[0009] In an optional embodiment, the insulating device further comprises an insulating baffle, the second end of the insulating body is connected with the insulating baffle, the insulating baffle is arranged vertically with the insulating body, so that the second end of the baffle is limited to one side of the inner wall of the baffle.
[0010] In an optional embodiment, the insulating body comprises a base plate, a first limiting plate and a second limiting plate, the first limiting plate and the second limiting plate are connected with the base plate, the first limiting plate and the second limiting plate are arranged in a spaced manner and are both towards the first end of the base plate, so that the first limiting plate and the second limiting plate form the gap with the base plate.
[0011] The limiting member limits the baffle on the first limiting plate and the second limiting plate.
[0012] In an optional embodiment, the first limiting plate is provided with a first opening, and the second limiting plate is provided with a second opening.
[0013] The limiting member comprises a first elastic rope, the first elastic rope passes through the first opening and the second opening, so that the baffle is limited on the first limiting plate and the second limiting plate.
[0014] In an optional embodiment, the first limiting plate is provided with a third opening, and the second limiting plate is provided with a fourth opening.
[0015] The limiting member comprises a second elastic rope, the second elastic rope passes through the third opening and the fourth opening, so that the baffle is limited on the first limiting plate and the second limiting plate.
[0016] In an optional embodiment, the first opening and the second opening are symmetrically arranged and arranged close to the first end of the insulating body, and the third opening and the fourth opening are symmetrically arranged and arranged close to the second end of the insulating body.
[0017] Or, the first opening and the second opening are arranged in a staggered manner, and the third opening and the fourth opening are arranged in a staggered manner, so that the first elastic rope and the second elastic rope are arranged in a staggered manner.
[0018] In an optional embodiment, the difference between the diameter of the first opening, the second opening, the third opening and the fourth opening and the diameter of the first elastic rope and the second elastic rope is not more than 1mm.
[0019] In an optional embodiment, the first limiting plate and the second limiting plate are arranged on the top of the base plate, and the second end of the first limiting plate and the second limiting plate is arranged opposite to the second end of the base plate.
[0020] The thickness of the first limiting plate and the second limiting plate is consistent, and the thickness of the base plate and the thickness of the first limiting plate or the second limiting plate is not greater than the gap.
[0021] In an optional embodiment, the first end of the buss plate does not extend beyond the first end of the insulating body, and the left and right sides of the buss plate do not extend beyond the insulating body.
[0022] The insulating device provided by the embodiments of the present application has the following advantages:
[0023] The insulating body and the limiting member are arranged to cover and limit the buss plate, thereby avoiding the short circuit and sparking of the battery cell caused by the contact between the buss plate arranged on the positive pole and the negative pole.
[0024] Further, the insulating device has a wide application range and can be used in the transportation and storage of the lithium battery cell, and can also be used in the pretreatment process before the test of the battery cell, thereby enabling the performance test of the lithium battery cell to be performed efficiently and accurately. BRIEF DESCRIPTION OF DRAWINGS
[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the embodiments will be briefly introduced as follows, and it should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0026] Figure 1 The structure schematic diagram of the battery cell provided by the present embodiment is shown in the figure.
[0027] Figure 2 The partial schematic diagram of the pole welding buss plate provided by the present embodiment is shown in the figure.
[0028] Figure 3 The structure schematic diagram of the insulating body provided by the present embodiment is shown in the figure.
[0029] Figure 4 The top view of the insulating body provided by the present embodiment is shown in the figure.
[0030] Figure 5 The structure schematic diagram of the insulating device covering and limiting the buss plate provided by the present embodiment is shown in the figure.
[0031] Icon: 010 - battery cell; 011 - top cover; 012 - shell; 013 - pole; 0131 - positive pole; 0132 - negative pole; 014 - tab; 0141 - gap; 015 - insulation device; 100 - insulation body; 110 - bottom plate; 120 - first limiting plate; 121 - first opening; 122 - third opening; 130 - second limiting plate; 131 - second opening; 132 - fourth opening; 140 - accommodation groove; 200 - limiting piece; 210 - first elastic rope; 220 - second elastic rope; 300 - insulation baffle. DETAILED DESCRIPTION
[0032] At present, in the development of battery cells, in addition to the design and production of battery cells, it is also very important to accurately and efficiently test the performance data of battery cells. Due to the limitation of battery cell testing technology, in addition to the basic charge and discharge in the production process, other electrical performance tests (such as long cycle, storage, high and low temperature test, rate test, etc.) must be carried out on professional electrical performance test machines; professional electrical performance test machines cannot directly charge and discharge the positive and negative poles of lithium batteries, and need to test the battery cells after tabbing. In order to facilitate testing, the conventional tab is usually in the state of extending out of the battery cell shell, and after the battery cell is tabbed, there is a risk of short circuit and fire caused by positive and negative contact during testing, transportation, storage and testing. Therefore, it is very important to insulate the battery tab.
[0033] The method of insulating the battery tab with blue film or insulating tape has the following disadvantages: 1. Insulating blue film and insulating tape are disposable products and cannot be reused, causing resource waste; 2. Insulating blue film and insulating tape will leave glue marks on the tab, which will increase the connection resistance during battery cell testing, causing abnormal temperature rise during battery cell testing, resulting in abnormal battery cell test data, which requires multiple retesting and verification, wasting test resources. Therefore, after removing the insulating blue film and insulating tape, the residual glue marks need to be polished, wasting human resources and affecting the test period; 3. Insulating blue film and insulating tape need to be removed during testing, which cannot guarantee the safety of the battery cell during testing.
[0034] In view of the above problems, the utility model provides an insulation device which can cover and insulate the tab and limit the tab, thereby improving the above problems.
[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme of the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.
[0036] The following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the application.
[0037] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0038] In the description of the application, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the application is used, and are only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.
[0039] In addition, if the terms "first", "second" and the like are used only to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0040] It should be noted that the features in the embodiments of the application can be combined with each other without conflict.
[0041] The overall structure, working principle and technical effects of the insulation device provided by the application will be described in detail below through embodiments and in conjunction with the drawings.
[0042] Please refer to Figures 3-5 The insulation device 015 provided by the application is used for limiting and insulating the tab 014; the insulation device 015 can be used in the transfer and storage process of the lithium battery cell; the insulation device 015 can also be used in the test process and pretreatment process (such as upper clamp) before the test of the cell 010, so that the performance test of the lithium battery cell can be carried out efficiently and accurately.
[0043] Please refer to Figure 1 and Figure 2 The cell 010 provided by the application comprises a top cover 011 and a shell 012 which are sealingly connected, and a bare cell is arranged in the top cover 011 and the shell 012; a pole 013 is arranged on the top cover 011, the pole 013 is weldedly connected with a tab of the bare cell, a tab 014 is arranged on the pole 013, and a gap 0141 is arranged between the tab 014 and the top cover 011.
[0044] Wherein, the bare battery core is provided with a positive electrode lug and a negative electrode lug, and the corresponding top cover 011 is provided with a positive electrode column 0131 and a negative electrode column 0132; meanwhile, the positive electrode column 0131 and the negative electrode column 0132 are both provided with a baffle 014, so that a professional electrical performance testing machine can test the positive and negative electrode columns 013 of the lithium battery through the baffle 014.
[0045] Please refer to Figures 3-5 The utility model provides an insulation device 015 for limiting the baffle 014, the top cover 011 is provided with the pole column 013, the baffle 014 is arranged on the pole column 013, and the gap 0141 is arranged between the baffle 014 and the top cover 011;The insulation device 015 comprises an insulation body 100 and a limiting piece 200, the first end of the insulation body 100 is provided with a gap 140, so that the pole column 013 can pass through the gap 140, the insulation body 100 is arranged in the gap 0141, and the first end of the baffle 014 is limited to the first end of the insulation body 100 by the limiting piece 200.
[0046] It can be understood that by arranging the insulation body 100 and the limiting piece 200, the insulation body 100 is assembled from the gap 0141, the gap 140 is directed to the pole column 013, so that the pole column 013 can pass through the gap 140, and the first end of the insulation body 100 can be arranged opposite to the first end of the baffle 014, the first end of the baffle 014 is limited to the first end of the insulation body 100 by the limiting piece 200, and the insulation device 015 realizes the covering insulation and limiting of the baffle 014, thereby avoiding the contact between the baffles 014 arranged on the positive electrode column 0131 and the negative electrode column 0132, which causes the short circuit and sparking of the battery core 010.
[0047] Therefore, the insulation device 015 arranged in this way can realize the covering insulation and limiting of the baffle 014, thereby avoiding the contact between the baffles 014 arranged on the positive electrode column 0131 and the negative electrode column 0132, which causes the short circuit and sparking of the battery core 010; meanwhile, the insulation device 015 can be recycled, reducing resource waste; meanwhile, the residual glue problem caused by the traditional process using insulating blue glue and insulating blue film is eliminated. Further, the insulation device 015 has a wide range of applications; it can be used in the transportation and storage process of the lithium battery core; it can also be used in the testing process and pretreatment process (such as upper clamps) before the testing process of the battery core 010, thereby enabling the performance testing of the lithium battery core to be carried out efficiently and accurately.
[0048] In this embodiment, the insulation device 015 comprises an insulation body 100.
[0049] In this embodiment, please refer to Figure 3 and Figure 4The first end of the insulating body 100 is provided with a clearance slot 140, so that the pole 013 can pass through the clearance slot 140, the insulating body 100 is arranged in the gap 0141, and the limiting part 200 limits the first end of the gasket 014 to the first end of the insulating body 100; the second end of the insulating body 100 is in limiting connection with the second end of the gasket 014.
[0050] Further, referring to Figure 3 The insulating device 015 further comprises an insulating baffle 300, the second end of the insulating body 100 is connected with the insulating baffle 300, and the insulating baffle 300 is vertically arranged with the insulating body 100, so that the second end of the gasket 014 is limited to the inner wall side of the baffle.
[0051] It can be understood that when the insulating device 015 is used, the insulating body 100 is placed in the gap 0141 between the gasket 014 and the top cover 011, the first end of the insulating body 100 is pushed towards the first end of the gasket 014, and the clearance slot 140 corresponds to the position of the pole 013 to avoid the interference of the pole 013 to the insulating body 100; further, the first end of the insulating body 100 is pushed to beyond the first end of the gasket 014, and the insulating baffle 300 at the second end of the insulating body 100 limits and covers the second end of the gasket 014. In this way, the insulating body 100 and the limiting part 200 cover and limit the whole gasket 014.
[0052] In this embodiment, the first end of the gasket 014 does not protrude from the first end of the insulating body 100, and the left and right sides of the gasket 014 do not protrude from the insulating body 100.
[0053] It can be understood that, in order to facilitate testing, the conventional gasket 014 is usually in a state that the first end of the gasket 014 protrudes from the shell 012 of the battery cell 010. Therefore, the first end of the gasket 014 does not protrude from the first end of the insulating body 100, so that the first end of the gasket 014 can be completely covered by the first end of the insulating body 100, so that the first end of the gasket 014 can be covered and insulated by the insulating body 100. At the same time, the left and right sides of the gasket 014 do not protrude from the insulating body 100, so that the whole gasket 014 can be covered and insulated by the insulating body 100.
[0054] In this embodiment, referring to Figure 3 and Figure 4The insulating body 100 comprises a bottom plate 110, a first limiting plate 120 and a second limiting plate 130, the first limiting plate 120 and the second limiting plate 130 are connected with the bottom plate 110, the first limiting plate 120 and the second limiting plate 130 are arranged at intervals and both are towards the first end of the bottom plate 110, so that the first limiting plate 120 and the second limiting plate 130 form a gap 140 with the bottom plate 110; the limiting piece 200 limits the gasket 014 on the first limiting plate 120 and the second limiting plate 130.
[0055] In the embodiment, the first limiting plate 120 and the second limiting plate 130 are arranged on the top of the bottom plate 110, and the second ends of the first limiting plate 120 and the second limiting plate 130 are arranged opposite to the second end of the bottom plate 110.
[0056] Further, the insulating baffle 300 is connected with the second end of the bottom plate 110, the insulating baffle 300 is arranged on the opposite ends of the bottom plate 110 with the first limiting piece 200 and the second limiting piece 200; at the same time, the insulating baffle 300 is arranged vertically with the second end of the bottom plate 110 and towards the top of the bottom plate 110.
[0057] The thickness of the first limiting plate 120 and the second limiting plate 130 is consistent, and the thickness of the bottom plate 110 is not greater than the gap 0141 between the first limiting plate 120 or the second limiting plate 130. It can be understood that when the insulating device 015 is used, the top surface of the first limiting plate 120 and the second limiting plate 130 is in contact with the bottom surface of the gasket 014, and the bottom surface of the bottom plate 110 is in contact with the top surface of the top cover 011.
[0058] The first limiting plate 120 and the second limiting plate 130 can be soft elastic insulating rubber material, and the insulating baffle 300 and the bottom plate 110 can be hard elastic insulating rubber material.
[0059] In the embodiment, the insulating device 015 comprises the limiting piece 200.
[0060] The limiting piece 200 is used to limit the first end of the gasket 014 on the first end of the insulating body 100, so as to cover and insulate the first end of the insulating body 100 and the first end of the gasket 014.
[0061] In one embodiment, the limiting piece 200 can be an elastic rope, a rope or the like, the elastic rope is directly sleeved and bound on the gasket 014 and the first limiting plate 120 and the second limiting plate 130, so that the gasket 014 is bound and limited on the first limiting plate 120 and the second limiting plate 130.
[0062] It is worth mentioning that in order to ensure that the limiting piece 200 can effectively limit the gasket 014 and the first limiting piece 200 and the second limiting piece 200 of the insulating body 100.
[0063] In the present embodiment, please refer to Figure 4 and Figure 5 The limiting member 200 includes a first elastic rope 210, the first limiting plate 120 is provided with a first opening 121, and the second limiting plate 130 is provided with a second opening 131; the first elastic rope 210 passes through the first opening 121 and the second opening 131, so that the tab 014 is limited on the first limiting plate 120 and the second limiting plate 130. It can be understood that one end of the first elastic rope 210 is sequentially threaded through the first opening 121 and the second opening 131, and then the two ends of the first elastic rope 210 are tied, so that the tab 014 is effectively limited on the first limiting member 200 and the second limiting member 200 of the insulating body 100.
[0064] In the present embodiment, the limiting member 200 includes a second elastic rope 220, the first limiting plate 120 is provided with a third opening 122, and the second limiting plate 130 is provided with a fourth opening 132; the second elastic rope 220 passes through the third opening 122 and the fourth opening 132, so that the tab 014 is limited on the first limiting plate 120 and the second limiting plate 130. It can be understood that one end of the second elastic rope 220 is sequentially threaded through the third opening 122 and the fourth opening 132, and then the two ends of the second elastic rope 220 are tied, so that the tab 014 is further effectively limited on the first limiting member 200 and the second limiting member 200 of the insulating body 100.
[0065] In one embodiment, the first opening 121 and the second opening 131 are symmetrically arranged and arranged close to the first end of the insulating body 100, and the third opening 122 and the fourth opening 132 are symmetrically arranged and arranged close to the second end of the insulating body 100. It can be understood that the first elastic rope 210 and the second elastic rope 220 arranged in this way are arranged in parallel.
[0066] In another embodiment, the first opening 121 and the second opening 131 are arranged in a staggered manner, and the third opening 122 and the fourth opening 132 are arranged in a staggered manner, so that the first elastic rope 210 and the second elastic rope 220 are arranged in a staggered manner.
[0067] In the present embodiment, the diameter of the first opening 121, the second opening 131, the third opening 122 and the fourth opening 132 is not more than 1mm different from the diameter of the first elastic rope 210 and the second elastic rope 220. It can be understood that the first elastic rope 210 and the second elastic rope 220 can pass through the first opening 121, the second opening 131, the third opening 122 and the fourth opening 132, which avoids the first opening 121, the second opening 131, the third opening 122 and the fourth opening 132 being too large to cause the tab 014 to contact other tabs 014, resulting in short circuit and fire of the battery cell 010, so as to ensure that the first limiting member 200 and the second limiting member 200 effectively cover the tab 014.
[0068] It is worth mentioning that the baffle 014 is arranged on the positive pole 0131 and the negative pole 0132, and the positive pole 0131 with the baffle 014 and the negative pole 0132 with the baffle 014 can use the insulation device 015 in the application.
[0069] The working principle and process of the insulation device 015 are as follows: first, the positive pole 013 and the negative pole 013 of the battery cell 010 are welded with the baffle 014 respectively.
[0070] When the insulation device 015 is used, the insulation body 100 is placed in the gap 0141 between the baffle 014 and the top cover 011, the top surfaces of the first limiting plate 120 and the second limiting plate 130 are attached to the bottom surface of the baffle 014, and the bottom surface of the bottom plate 110 is attached to the top surface of the top cover 011. Further, the first limiting plate 120 and the second limiting plate 130 of the insulation body 100 are pushed towards the first end of the baffle 014, and the accommodating groove 140 corresponds to the position of the pole 013, so that the accommodating groove 140 passes through the bottom of the pole 013, avoiding the interference of the pole 013 on the insulation body 100; until the first limiting plate 120 and the second limiting plate 130 of the insulation body 100 are pushed to exceed the first end of the baffle 014, and the second end of the insulation body 100 is limited and covered by the insulation baffle 300 and the second end of the baffle 014.
[0071] Finally, one end of the first elastic rope 210 is sequentially threaded through the first opening 121 and the second opening 131, and the two ends of the first elastic rope 210 are tied; one end of the second elastic rope 220 is sequentially threaded through the third opening 122 and the fourth opening 132, and the two ends of the second elastic rope 220 are tied, so that the baffle 014 is further effectively limited on the first limiting member 200 and the second limiting member 200 of the insulation body 100, and the insulation body 100 and the limiting member 200 realize the overall covering insulation and limiting of the baffle 014.
[0072] The comparative example 1 using the prior art (insulating blue film or insulating blue glue is attached to the baffle 014) and the example 1 using the application (insulation and limiting of the baffle 014 are covered by the insulation device 015) are tested.
[0073] Comparative example 1:
[0074] Step 1: prepare the test battery cell sample, and then weld the baffle with the positive pole and the negative pole of the battery cell respectively;
[0075] Step 2: prepare the insulating blue film or insulating blue glue;
[0076] Step 3: Insulating blue film or insulating blue glue is cut into a piece of the same size as the tab using a ceramic knife;
[0077] Step 4: The cut insulating blue film or insulating blue glue is directly pasted on the tab to ensure that the tab is completely covered with insulation;
[0078] Step 5: The welded tab cell with insulation is transferred to the test room;
[0079] Step 6: The insulating blue film or blue glue is removed, and the residual glue on the tab is not polished (the blue film needs to be disposed of);
[0080] Step 7: The cell is placed in a constant temperature and humidity test chamber, and the positive and negative tabs are connected to the input and output cables of the test equipment, and the internal resistance of the cable to the tab welding point is measured;
[0081] Step 8: Randomly select 10 EA cells, and perform the above operation 10 times, and record the internal resistance data of the positive cable to the positive welding point and the internal resistance data of the negative cable to the negative welding point as follows:
[0082] Step 9: After connecting the internal resistance test, the positive and negative electrodes of the battery monomer are connected to the test equipment through voltage data acquisition lines (voltage acquisition 1, voltage acquisition 2) to form a voltage data acquisition loop;
[0083] Step 10: The battery monomer temperature sampling point is connected to the test equipment through the temperature data sampling line to form a temperature data acquisition loop;
[0084] Step 11: 0.5P constant power charging to 3.65V cutoff;
[0085] Step 12: Standby state for 10 min;
[0086] Step 13: 0.5P constant power discharge to 2.5V cutoff;
[0087] Step 14: Standby state for 10 min;
[0088] Step 15: Steps 1-14 are repeated 4 times.
[0089] The charge and discharge performance test method in the above Comparative Example 1 is carried out under the initial condition of 25°C.
[0090] At the end of the test, the maximum temperature of the positive welding point and the maximum temperature of the negative welding point of the cell 010 in Comparative Example 1 are recorded, and the data are recorded in Table 1.
[0091]
[0092] Table 1
[0093] Example 1:
[0094] The experiment was performed on the battery cell 010 of the same batch as in Example 1 and Comparative Example 1.
[0095] Step 1: The positive pole 0131 and the negative pole 0132 of the battery cell 010 were respectively welded with the busbar 014;
[0096] Step 2: The insulating body 100 was placed in the gap 0141 between the busbar 014 and the top cover 011, the first limiting plate 120 and the second limiting plate 130 of the insulating body 100 were pushed towards the first end of the busbar 014, and the accommodating slot 140 was made to pass through the bottom of the pole 013 so as to correspond to the position of the pole 013;
[0097] Step 3: The top surfaces of the first limiting plate 120 and the second limiting plate 130 were attached to the bottom surface of the busbar 014;
[0098] Step 4: The bottom surface of the bottom plate 110 was attached to the top surface of the top cover 011;
[0099] Step 5: One end of the first elastic rope 210 was sequentially threaded through the first opening 121 and the second opening 131, and the two ends of the first elastic rope 210 were tied;
[0100] Step 6: One end of the second elastic rope 220 was sequentially threaded through the third opening 122 and the fourth opening 132, and the two ends of the second elastic rope 220 were tied;
[0101] Step 7: The busbar 014 was completely covered, achieving the insulation effect;
[0102] Step 8: The battery cell 010 with the busbar 014 assembled with the insulating device 015 was transferred to the test room;
[0103] Step 9: The first elastic rope 210 threaded through the first opening 121 and the second opening 131 was loosened;
[0104] Step 10: The battery cell 010 was placed in the constant temperature and humidity test box, the positive and negative busbars 014 were connected to the input and output cables of the test equipment, and the internal resistance of the cables to the welding points of the busbar 014 was measured;
[0105] Step 11: 10 EA battery cells 010 were randomly selected, the above operation was performed 10 times, and 10 internal resistance data were recorded as follows:
[0106] Step 12: After the internal resistance test was completed, the positive and negative poles of the battery cell were connected to the test equipment through the voltage data collection lines (voltage collection 1 and voltage collection 2) to form a voltage data collection loop;
[0107] Step 13: The battery cell temperature sampling point is connected with the test equipment through a temperature data sampling line to form a temperature data acquisition loop.
[0108] Step 14: After all the test sampling lines are connected;
[0109] Step 15: One end of the first elastic rope 210 is sequentially threaded through the first opening 121 and the second opening 131, and the two ends of the first elastic rope 210 are tied tight (the test process is normal for the insulating of the cell 010 tab 014);
[0110] Step 16: 0.5P constant power charging to 3.65V cutoff;
[0111] Step 17: Standby state for 10 min;
[0112] Step 18: 0.5P constant power discharge to 2.5V cutoff;
[0113] Step 19: Standby state for 10 min;
[0114] Step 20: Steps 1-19 are repeated 4 times.
[0115] The charge-discharge performance test method in the above embodiment 1 is carried out under the initial condition of 25℃.
[0116] After the test is completed, the maximum temperature of the positive electrode welding point of the cell 010 and the maximum temperature of the negative electrode welding point are recorded, and the data are recorded as shown in Table 2.
[0117]
[0118] Table 2
[0119] According to the connection resistance test process and data in Table 2 of embodiment 1 and the connection resistance test process and data in Table 1 of comparative example 1, it can be known that the insulation device 015 of embodiment 1 can play an insulating effect during the test process, and the internal resistance of the positive and negative electrode cables to the tab 014 welding point is less than 0.08mΩ, which saves the time of polishing the tab 014 in comparative example 1 and reduces the waste of manpower; at the same time, compared with comparative example 1, the maximum test temperature during the test process of embodiment 1 is also reduced by 5-6℃, which ensures the accuracy and efficiency of the test results.
[0120] In summary, the insulating device 015 provided by the embodiment of the present application can realize the covering insulation and the limiting of the tab 014 by arranging the insulating body 100 and the limiting piece 200, and then the short circuit and sparking of the battery cell 010 caused by the contact between the tab 014 arranged on the positive pole 0131 and the negative pole 0132 can be avoided; meanwhile, the insulating device 015 can be recycled, and the resource waste is reduced; meanwhile, the residual glue problem caused by the insulating blue glue and the insulating blue film used in the traditional process is also eliminated.
[0121] Further, the insulating device 015 has a wide application range; can be used in the transfer and storage process of the lithium battery cell; can also be used in the pretreatment process before the test of the battery cell 010 and in the test process of the battery cell 010, and then the performance test of the lithium battery cell can be efficiently and accurately performed.
[0122] The above is only a specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.
Claims
1. An insulating device, characterized in that, The top cover is provided with a pole, and the limiting disc is arranged on the pole, and a gap is arranged between the limiting disc and the top cover; The insulating device comprises an insulating body and a limiting member, the first end of the insulating body is provided with a gap slot, so that the pole can pass through the gap slot, the insulating body is arranged in the gap, and the limiting member limits the first end of the limiting disc to the first end of the insulating body.
2. The insulating device of claim 1, wherein, The second end of the insulating body is in limiting connection with the second end of the limiting disc.
3. The insulating device of claim 2, wherein, The insulating device further comprises an insulating baffle, the second end of the insulating body is connected with the insulating baffle, the insulating baffle is vertically arranged with the insulating body, so that the second end of the limiting disc is limited to one side of the inner wall of the baffle.
4. The insulating device of claim 1, wherein, The insulating body comprises a bottom plate, a first limiting plate and a second limiting plate, the first limiting plate and the second limiting plate are connected with the bottom plate, the first limiting plate and the second limiting plate are arranged in a spaced manner and are both towards the first end of the bottom plate, so that the first limiting plate and the second limiting plate form the gap slot with the bottom plate; The limiting member limits the limiting disc on the first limiting plate and the second limiting plate.
5. The insulating device of claim 4, wherein, The first limiting plate is provided with a first opening, and the second limiting plate is provided with a second opening; The limiting member comprises a first elastic rope, the first elastic rope passes through the first opening and the second opening, so that the limiting disc is limited on the first limiting plate and the second limiting plate.
6. The insulating device of claim 5, wherein, The first limiting plate is provided with a third opening, and the second limiting plate is provided with a fourth opening; The limiting member comprises a second elastic rope, the second elastic rope passes through the third opening and the fourth opening, so that the limiting disc is limited on the first limiting plate and the second limiting plate.
7. The insulating device of claim 6, wherein, The first opening and the second opening are symmetrically arranged and close to the first end of the insulating body, and the third opening and the fourth opening are symmetrically arranged and close to the second end of the insulating body; Or, the first opening and the second opening are arranged in a staggered manner, and the third opening and the fourth opening are arranged in a staggered manner, so that the first elastic rope and the second elastic rope are arranged in a staggered manner.
8. The insulating device of claim 6, wherein, The diameter of the first opening, the second opening, the third opening and the fourth opening is not more than 1mm different from the diameter of the first elastic rope and the second elastic rope.
9. The insulating device of claim 4, wherein, The first limiting plate and the second limiting plate are arranged on the top of the bottom plate, and the second end of the first limiting plate and the second limiting plate is arranged opposite to the second end of the bottom plate; The thickness of the first limiting plate and the second limiting plate is consistent, and the thickness of the bottom plate is not more than the thickness of the first limiting plate or the second limiting plate.
10. The insulating device of claim 1, wherein, The first end of the limiting disc does not protrude from the first end of the insulating body, and the left and right sides of the limiting disc do not protrude from the insulating body.