Cylindrical lithium battery DCIR testing device

Abstract

The utility model relates to the technical field of lithium battery testing, in particular to a cylindrical lithium battery DCIR testing device, which comprises a pair of guide rails parallel to each other and arranged along a first direction; the first support is connected to the guide rail and can be driven by a linear driver to move in the length direction of the guide rail; the Z-axis driving part is connected to the second bracket; and the second bracket is connected to the output end of the Z-axis driving component. The testing equipment provided by the utility model is provided with a plurality of groups of probe group structures at fixed positions, the battery tray can be controlled by the driving device along with the bracket below and move along the column direction and the Z-axis direction of the batteries, the battery rows corresponding to the probe group structures can be changed when the battery tray moves along the column direction, and the battery rows can be changed when the battery tray moves along the Z-axis direction. Therefore, the probe group structure can be in contact with or separated from the batteries, row-by-row testing of all the batteries in the battery tray can be realized through the mode, the testing speed is high, and the automation degree is high.

Description

TECHNICAL FIELD

[0001] The utility model relates to lithium battery testing technical field, concretely relates to cylindrical lithium battery DCIR testing arrangement. BACKGROUND

[0002] The purpose of cylindrical lithium battery DCIR (Direct Current Internal Resistance) test is to evaluate the performance and state of the battery. DCIR test reflects the internal condition of the battery by measuring the internal resistance of the battery under direct current, and this internal resistance value can reflect the performance condition of the key parts such as electrode material, electrolyte and separator in the battery.

[0003] The test process is: the positive electrode of the direct current power supply is connected to the positive electrode of the lithium battery, the negative electrode is connected to the negative electrode of the lithium battery, the electronic load or constant current load is connected between the positive and negative electrodes of the lithium battery, the appropriate current value is selected, and the test time is usually a few seconds. In this test process, how to carry out high-speed automatic test on a large number of batteries becomes a problem to be solved. UTILITY MODEL CONTENTS

[0004] In view of the technical problems existing in the lithium battery DCIR test in the prior art, the utility model provides a cylindrical lithium battery DCIR testing device, which comprises:

[0005] A pair of guide rails are parallel to each other and arranged along the first direction;

[0006] The first support is connected to the guide rail and can be driven by the linear driver to move along the length direction of the guide rail;

[0007] The Z-axis driving part is connected to the second support;

[0008] The second support is connected to the output end of the Z-axis driving part and can be driven by the Z-axis driving part to ascend and descend in the Z-axis direction, so that the second support reciprocates between the first position and the second position. The second support is used for carrying the battery tray, and a plurality of rows of batteries to be tested are placed in the battery tray;

[0009] The test part is arranged above the second support;

[0010] The cooling part is used for air cooling and water cooling of the test part;

[0011] The test component comprises a plurality of groups of probe group structures, each group of probe group structures corresponding to a row of to-be-tested batteries in the battery tray, when the second support is in the first position, the positive and negative electrodes of one or more rows of to-be-tested batteries at target positions in the battery tray are attached to the probe group structures to perform DCIR testing on the current to-be-tested battery, and when the second support is in the second position, the positive and negative electrodes of the to-be-tested batteries in the battery tray are detached from the probe group structures.

[0012] Preferably, the plurality of groups of probe group structures are arranged at equal intervals.

[0013] Preferably, the interval between every two rows of to-be-tested batteries in the battery tray is defined as D, the interval between two adjacent to-be-tested batteries in each row is defined as L, the interval between every two groups of probe group structures is an integer multiple of D, and the interval between two adjacent probe group structures in each group is L.

[0014] Preferably, the test component further comprises a support, the probe group structures comprise a plurality of probe structures, an upper end of a guide rod arranged above the probe structure is connected to an electrode cap, and the electrode cap is connected to a positive or negative electrode of a power supply through a lead wire.

[0015] Preferably, a spring is arranged between the probe structure and the support, the spring is sleeved on an outer wall of the guide rod, and the probe structure has a downward movement tendency.

[0016] Preferably, the probe structure comprises a positive electrode probe, a positioning probe and a negative electrode probe.

[0017] Preferably, the cooling component comprises a fan array and a water-cooled coil.

[0018] Preferably, the first direction is towards the column direction of the to-be-tested batteries in the battery tray.

[0019] Compared with the prior art, the test device has the following advantages:

[0020] The test device comprises a plurality of groups of probe group structures arranged at fixed positions, each group of probe group structures corresponding to one or more rows of to-be-tested batteries in the battery tray, the battery tray being capable of being driven by a driving device to move along the column direction of the batteries and the Z-axis direction, when moving along the column direction, the battery row corresponding to the probe group structures can be changed, when moving along the Z-axis direction, the probe group structures can be brought into contact with or detached from the batteries, and in this way, all the batteries in the battery tray can be tested row by row, the test speed is high, and the degree of automation is high. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures can be represented by a like numeral. For purposes of clarity, not every component can be called out in every drawing. There is now being described by way of example various embodiments of aspects of the present application, with reference to the accompanying drawings, in which:

[0022] Figure 1 is a front view of the cylindrical lithium battery DCIR testing device shown in the present application;

[0023] Figure 2 is a side view of the cylindrical lithium battery DCIR testing device shown in the present application;

[0024] Figure 3 is a structural schematic view of the testing component shown in the present application;

[0025] Figure 4 is a structural schematic view of the probe group structure shown in the present application;

[0026] Figure 5 is a simplified structural view of the cylindrical lithium battery DCIR testing device shown in the present application;

[0027] Figure 6 is a schematic view of the second bracket in the first position shown in the present application;

[0028] Figure 7 is a schematic view of the second bracket in the second position shown in the present application. DETAILED DESCRIPTION

[0029] In order to better understand the technical content of the present application, specific embodiments are described below with the accompanying drawings.

[0030] In combination with Figure 1 and Figure 2 shown, the present application proposes a cylindrical lithium battery DCIR testing device, mainly comprising an X-axis driving component, a Z-axis driving component 20, a testing component 40 and a cooling component.

[0031] Among them, the X-axis driving component comprises a pair of guide rails 11, a first bracket 12 and a linear driver 13, and the pair of guide rails 11 are parallel to each other and are arranged along the first direction. The first direction refers to the X-axis direction.

[0032] The first bracket 12 is connected to the guide rail 11 and can be driven by the linear driver 13 to move along the length direction of the guide rail 11.

[0033] Further, the Z-axis driving component 20 is connected to the second support 12, the second support 24 is connected to the output end of the Z-axis driving component 20 and can be driven by the Z-axis driving component 20 to ascend and descend in the Z-axis direction, so as to make the second support 24 move to and fro between the first position and the second position, and the second support 24 is used for carrying the battery tray 30 in which a plurality of rows of batteries to be tested are placed.

[0034] In an optional embodiment, the Z-axis driving component 20 comprises a driving motor 21, the driving motor 21 is a double-shaft driving motor and has two output shafts, the output shafts at two ends are connected to gear boxes 22 respectively, the gear boxes have two output ends and are connected to two gear boxes 22 respectively, and the output ends of the four gear boxes 22 located at four corners are provided with screw rod lifting structures 23 for controlling the ascending and descending of the second support 24. By using one motor, the four screw rod structures can ensure that the second support 24 ascends and descends in a posture parallel to the horizontal plane, so that each battery in the battery tray 30 can ascend or descend by the same distance.

[0035] In the battery tray 30, a plurality of batteries to be tested are arranged in a matrix.

[0036] The distance between every two rows of batteries to be tested in the battery tray 30 is defined as D, and the distance between two adjacent batteries to be tested in each row is defined as L, wherein the first direction is the column direction of the batteries in the battery tray 30.

[0037] Further, the testing component 40 is arranged above the second support 24, the testing component 40 comprises a plurality of groups of probe structures 44, each group of probe structures 44 corresponds to one row of batteries to be tested in the battery tray 30, when the second support 24 is at the first position, the positive and negative electrodes of one or more rows of batteries to be tested at the target position in the battery tray 30 are in contact with the group of probe structures 44, so as to perform DCIR testing on the current batteries to be tested, and when the second support 24 is at the second position, the positive and negative electrodes of the batteries to be tested in the battery tray 30 are separated from the group of probe structures 44.

[0038] Preferably, the plurality of groups of probe structures 44 are arranged at equal intervals. In this way, the plurality of groups of probe structures 44 correspond to the plurality of rows of batteries to be tested respectively, when the second support 24 is moved along the X-axis direction by the first support 12, the battery tray 30 is also moved along the X-axis direction by the second support 24, so that the batteries to be tested which are not measured are transferred to below the plurality of groups of probe structures 44 in rows, and the testing is performed row by row.

[0039] In order to correspond to the matrix arrangement of the lithium batteries in the battery tray 30, the distance between every two groups of probe structures 44 is an integer multiple of D, and the distance between two adjacent probe structures 44 in each group is L.

[0040] Thus, when the moving distance of the second bracket 24 is D each time, the test can be implemented row by row.

[0041] In combination Figure 3 As shown, the test component 40 further comprises a bracket 41, and the probe group structure 44 comprises a plurality of probe structures, and the upper portion of the probe structure is provided with a guide rod 42, the upper end of the guide rod 42 is connected with an electrode cap 45, and the electrode cap 45 is connected to the positive or negative pole of the power supply through a lead wire.

[0042] Preferably, a spring 43 is arranged between the probe structure and the bracket 41, the spring 43 is sleeved on the outer wall of the guide rod 42, and the spring 43 keeps the probe structure having a downward movement tendency.

[0043] Thus, when the second bracket 24 moves from the second position to the first position, the spring 43 is compressed, at this time, part of the probe structure and the surface of the lithium battery are pressed to ensure stable contact.

[0044] In combination Figure 4 As shown, the probe structure comprises a positive probe 441, a positioning probe 442 and a negative probe 443.

[0045] When the second bracket 24 is in the first position, the three positioning probes 442 position the battery to a predetermined area to ensure the axial position, at this time, the positive probe 441 contacts the positive pole of the battery, and the negative probe 443 contacts the negative pole of the battery, and the DCIR test is implemented by connecting the positive probe 441 and the negative probe 443 to the DC power supply.

[0046] Since a large current passes through the probe during the test, it is necessary to cool the probe when a large number of frequent tests are implemented, therefore, a cooling component is arranged above the test component 40, and the cooling component is used to air cool and water cool the test component 40.

[0047] Optionally, the cooling component comprises a fan array 50 and a water cooling coil 60, the fan array 50 is arranged above the water cooling coil 60, and the fan array 50 blows air downward to make the air cooled by the water cooling coil 60 blow to the probe structure.

[0048] In a specific embodiment, in combination Figure 5 As shown, nine rows of batteries to be tested are arranged in the battery tray 30, the test component 40 has three groups of probe group structures 44, the Z-axis driving component 20 controls the battery tray 30 to move from the second position to the first position, for example Figures 5 to 6 As shown, at this time, the first, fourth and seventh rows of batteries on the battery tray 30 contact the three groups of probe group structures 44, after contacting for a predetermined time, the Z-axis driving component 20 controls the battery tray 30 to further descend from the first position to the second position, and the X-axis driving component controls the first bracket 12 to move leftwards along the guide rail 11 by D, at this time, as shown in Figure 7As shown, the second, fifth, eighth row of batteries and three groups of probe group structure 44 position corresponding, control Z axis drive component 20 control battery tray 30 from the second position to the first position, complete the second, fifth, eighth row of battery test, repeat the above steps until the third, sixth and ninth row of battery test.

[0049] In combination with the above embodiment, the test equipment provided by the utility model is provided with multiple groups of probe group structures in fixed positions, each group of probe group structure corresponds to one row or multiple rows of measured batteries in the battery tray, the battery tray can be controlled by the driving device to move along the column direction of the batteries and the Z axis direction, when moving along the column direction, the battery row corresponding to the probe group structure can be changed, when moving along the Z axis direction, the probe group structure can be contacted with or separated from the batteries, through this mode, the row-by-row test of all the batteries in the battery tray can be realized, the test speed is fast, the degree of automation is high, and meanwhile, the cooling component is configured to cool the probe structure, so as to realize the long-time continuous test requirement.

[0050] Although the utility model has disclosed as above with preferred embodiment, it is not used to limit the utility model. Those skilled in the art to which the utility model belongs can make various changes and decorations without departing from the spirit and scope of the utility model. Therefore, the protection scope of the utility model shall be defined by the claim.

Claims

1. A cylindrical lithium battery DCIR test apparatus, characterized by, The utility model relates to a battery DCIR test device, including: A pair of guide rails (11) are parallel to each other and are arranged along a first direction; A first support (12) is connected to the guide rails (11) and can be driven by a linear driver (13) to move along the length direction of the guide rails (11); A Z-axis driving component (20) is connected to the second support (12); A second support (24) is connected to the output end of the Z-axis driving component (20) and can be driven by the Z-axis driving component (20) to ascend and descend in the Z-axis direction, so that the second support (24) reciprocates between a first position and a second position, and the second support (24) is used for carrying a battery tray (30) in which a plurality of rows of to-be-tested batteries are placed; A test component (40) is arranged above the second support (24); A cooling component is used for air cooling and water cooling of the test component (40); The test component (40) includes a plurality of groups of probe group structures (44), each group of probe group structures (44) corresponds to a row of to-be-tested batteries in the battery tray (30), when the second support (24) is in the first position, the positive and negative electrodes of one or more rows of to-be-tested batteries at a target position in the battery tray (30) are attached to the probe group structures (44), and DCIR testing is performed on the current to-be-tested battery, when the second support (24) is in the second position, the positive and negative electrodes of the to-be-tested batteries in the battery tray (30) are separated from the probe group structures (44).

2. The cylindrical lithium battery DCIR test device of claim 1, wherein, The plurality of groups of probe group structures (44) are arranged at equal intervals.

3. The cylindrical lithium battery DCIR test device of claim 1, wherein, The interval between every two rows of to-be-tested batteries in the battery tray (30) is defined as D, the interval between adjacent two to-be-tested batteries in each row is defined as L, the interval between every two groups of probe group structures (44) is an integer multiple of D, and the interval between adjacent two probe group structures (44) in each group is L.

4. The cylindrical lithium battery DCIR test apparatus of claim 1, wherein, The test component (40) further includes a support (41), the probe group structures (44) include a plurality of probe structures, an upper end of a guide rod (42) arranged above the probe structures is connected to an electrode cap (45), and the electrode cap (45) is connected to a positive electrode or a negative electrode of a power supply through a lead wire.

5. The cylindrical lithium battery DCIR test device of claim 4, wherein, A spring (43) is arranged between the probe structures and the support (41), the spring (43) is sleeved on the outer wall of the guide rod (42) and keeps the probe structures having a downward movement tendency.

6. The cylindrical lithium battery DCIR test apparatus of claim 4, wherein, The probe structures include a positive electrode probe (441), a positioning probe (442) and a negative electrode probe (443).

7. The cylindrical lithium battery DCIR test apparatus of claim 1, wherein, The cooling component includes a fan array (50) and a water cooling coil (60).

8. The cylindrical lithium battery DCIR test apparatus of claim 3, wherein, The first direction is toward the column direction of the to-be-tested batteries in the battery tray (30).

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