Lithium battery capacity grading equipment

Abstract

The utility model provides lithium battery capacity grading equipment, and relates to the technical field of lithium battery capacity grading. The lithium battery capacity grading equipment comprises a power source and a needle bed executing mechanism, the power source is installed on the needle bed executing mechanism, a probe is arranged at the output end of the power source, and the needle bed executing mechanism is used for bearing a battery and driving the battery to move relative to the power source so that the battery can make contact with the probe. The output end of the power source is used for being directly connected with the probe of the needle bed executing mechanism in the production stage, so that the power source and the probe form an integrated structure before leaving a factory, direct connection of the power source and the probe is achieved, the size after the power source and the probe are connected is reduced, and the occupied area of the lithium battery capacity grading equipment is reduced; and a power supply is prevented from being connected with the probe during on-site construction, so that the workload of on-site construction wiring is reduced, and the probability of wrong wiring of a wire sequence is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of lithium battery capacity division, in particular to a lithium battery capacity division device. Background Art

[0002] After a batch of lithium batteries are made, although the size is the same, the capacity of the batteries will be different. Therefore, they must be fully charged according to the specifications on the lithium battery capacity separation equipment, and then discharged (completely discharged) according to the specified current. The time taken to discharge the battery fully multiplied by the discharge current is the capacity of the battery. Only when the tested capacity meets or exceeds the designed capacity, the lithium battery is qualified, and the battery with less than the designed capacity cannot be considered a qualified battery. The process of selecting qualified batteries through capacity testing is called capacity separation.

[0003] The existing lithium battery capacity classification equipment consists of a needle bed part, a channel wire groove, and a power supply part. The power supply part is provided with a power supply for charging the lithium battery. The power supply and the probe of the needle bed part are connected by a channel wire. The channel wire is arranged in the channel wire groove. The lithium battery capacity classification equipment occupies a large area, and during the on-site construction and wiring process, the probability of incorrect connection of the channel wire sequence is relatively large. Utility Model Content

[0004] The utility model aims to solve the problem that the battery capacity dividing equipment occupies a large area.

[0005] In order to solve the above problems, the utility model provides a lithium battery capacity classification device, including a power supply and a needle bed actuator, the power supply is installed on the needle bed actuator, the output end of the power supply is provided with a probe, the needle bed actuator is used to carry the battery and drive the battery and the power supply to move relative to each other so that the battery contacts the probe.

[0006] Optionally, the lithium battery capacity division device further comprises an equipment cabinet, wherein a storage cavity is arranged in the equipment cabinet, and the storage cavity is distributed in two layers and two columns in the equipment cabinet, and the power supply and the needle bed actuator are arranged in any of the storage cavities.

[0007] Optionally, the needle bed actuator includes an upper frame, a middle frame, a lower frame and a lifting cylinder distributed along the height direction of the storage cavity, the power supply is installed on the top of the upper frame, the probe is facing the middle frame, the lifting cylinder is located between the middle frame and the lower frame, and is driven and connected to the middle frame, the top of the middle frame is used to accommodate batteries, and the lifting cylinder is used to drive the middle frame to move toward the upper frame so that the electrode of the battery can dock with the probe.

[0008] Optionally, the power supply includes an AC / DC power supply and two groups of DC / DC power supplies installed on the upper frame, the output end of the AC / DC power supply is connected between the input ends of the two groups of DC / DC power supplies through a copper bar, and the output ends of the two groups of DC / DC power supplies are respectively connected to the corresponding probes.

[0009] Optionally, the horizontal position of the DC / DC power supply on the upper frame is adjustable.

[0010] Optionally, two power distribution cabinets are further provided in the equipment cabinet, and the two power distribution cabinets are located between the two rows of storage cavities and are respectively used to supply power to the power sources in the two rows of storage cavities.

[0011] Optionally, a cooling fan and a surface cooler are provided on the inner wall of the storage cavity flush with the power supply, the air outlet of the cooling fan faces the battery, and the air inlet of the cooling fan faces the surface cooler, and the surface cooler is used to pass cooling water.

[0012] Optionally, a circulation fan is also provided in the storage cavity, and the circulation fan is located at the bottom of the storage cavity, the air inlet end of the circulation fan faces the power supply, and the air outlet end of the circulation fan is connected to the air inlet end of the cooling fan through an air duct.

[0013] Optionally, the two groups of DC / DC power supplies are respectively connected to the upper frame.

[0014] Optionally, the two groups of DC / DC power supplies are respectively slidably connected to the upper frame.

[0015] Compared with the prior art, in the lithium battery capacity division device of the utility model, the power supply is installed on the needle bed actuator, the output end of the power supply is provided with a probe, the needle bed actuator is used to carry the battery, and the battery carried by it can be driven to move relative to the power supply through the needle bed actuator, so that the battery and the probe of the power supply are in contact, thereby realizing the capacity division test of the battery. Since the output end of the power supply is directly provided with a probe, the power supply and the probe are directly connected, so that there is no need to set up a special needle bed part and a channel wire groove, and there is no need to use a channel wire to connect the probe of the needle bed part with the power supply, which not only reduces the volume after the power supply and the probe are connected to reduce the floor space of the lithium battery capacity division device, but also avoids the use of a channel wire to connect the power supply and the probe during on-site construction, thereby reducing the workload of on-site construction wiring and avoiding the problem of wrong sequence connection of the channel wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of a lithium battery capacity dividing device in an embodiment of the utility model;

[0017] Figure 2It is a top view of the lithium battery capacity dividing device in the embodiment of the utility model.

[0018] Description of reference numerals:

[0019] 1-power supply; 11-AC / DC power supply; 12-DC / DC power supply; 2-needle bed actuator; 21-probe; 22-upper frame; 23-middle frame; 24-lower frame; 25-lifting cylinder; 3-equipment cabinet; 31-storage cavity; 32-distribution cabinet; 4-cooling fan; 5-cooler; 6-circulation fan. DETAILED DESCRIPTION

[0020] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0021] In the accompanying drawings, the Z axis represents the horizontal position, and the positive direction of the Z axis (that is, the direction in which the arrow of the Z axis points) represents the upper side, and the negative direction of the Z axis (that is, the direction opposite to the positive direction of the Z axis) represents the lower side; in the accompanying drawings, the X axis represents the horizontal position, and the positive direction of the X axis (that is, the direction in which the arrow of the X axis points) represents the right side, and the negative direction of the X axis (that is, the direction opposite to the positive direction of the X axis) represents the left side; in the accompanying drawings, the Y axis represents the front and rear position, and the positive direction of the Y axis (that is, the direction in which the arrow of the Y axis points) represents the front side, and the negative direction of the Y axis (that is, the direction opposite to the positive direction of the Y axis) represents the rear side. It should also be noted that the aforementioned Z axis, X axis, and Y axis are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0022] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data in this way can be interchanged under appropriate circumstances, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein.

[0023] After a batch of lithium batteries are made, although the size is the same, the capacity of the batteries will be different. Therefore, they must be fully charged according to the specifications on the lithium battery capacity separation equipment, and then discharged (completely discharged) according to the specified current. The time taken to discharge the battery fully multiplied by the discharge current is the capacity of the battery. Only when the tested capacity meets or exceeds the designed capacity, the lithium battery is qualified, and the battery with less than the designed capacity cannot be considered a qualified battery. This process of screening out qualified batteries through capacity testing is called capacity separation.

[0024] At present, in lithium battery capacity division equipment, the capacity division power supply and the probe of the actuator are connected through a channel wire set in a channel wire trough. Since the channel wire trough needs to occupy a certain volume, the overall volume of the capacity division power supply after being connected with the probe of the actuator through the channel wire in the channel wire trough is relatively large, which makes the lithium battery capacity division equipment occupy a large area. Moreover, during the on-site construction and wiring process, the number of probes of the actuator is usually multiple, and the installation line sequence of multiple probes is connected with the corresponding channel wire, which makes the on-site construction wiring time longer and the on-site wiring efficiency relatively low. Moreover, due to the large number of probes, the probability of incorrect line sequence connection is relatively large.

[0025] Combination Figure 1 As shown, the utility model provides a lithium battery capacity dividing device, including a power supply 1 and a needle bed actuator 2, the power supply 1 is installed on the needle bed actuator 2, a probe 21 is provided at the output end of the power supply 1, and the needle bed actuator 2 is used to carry the battery and drive the battery and the power supply 1 to move relative to each other so that the battery contacts the probe.

[0026] Specifically, during the production stage of the power supply 1, a probe 21 is directly installed on the output end of the power supply 1, that is, when leaving the factory, the output end of the power supply 1 has the probe 21, and the power supply 1 and the probe 21 form an integrated structure and are transported as a whole to the wiring site.

[0027] In this embodiment, the power supply 1 is installed on the needle bed actuator 2, and the output end of the power supply 1 is provided with a probe 21. The needle bed actuator 2 is used to carry the battery. Through the needle bed actuator 2, the battery carried by it can be driven to move relative to the power supply 1, so that the battery contacts the probe of the power supply 1, thereby realizing the battery capacity division test. Since the output end of the power supply 1 is directly provided with the probe 21, the power supply 1 is directly connected to the probe 2. In this way, there is no need to set up a special needle bed part and a channel wire groove, and there is no need to use a channel wire to connect the probe of the needle bed part to the power supply 1. Not only does it reduce the volume after the power supply 1 and the probe 2 are connected to reduce the floor space of the lithium battery capacity division equipment, but it can also avoid using a channel wire to connect the power supply 1 and the probe 2 during on-site construction, thereby reducing the workload of on-site construction wiring and avoiding the problem of wrong channel wire sequence connection.

[0028] Optionally, combined Figure 1 and Figure 2 As shown, the lithium battery capacity dividing device also includes an equipment cabinet 3, in which a storage cavity 31 is arranged. The storage cavity 31 is distributed in two layers and two rows in the equipment cabinet 3, and a power supply 1 and a needle bed actuator 2 are arranged in any storage cavity 31.

[0029] Specifically, the depth direction of the storage cavity 31 is the Y axis, that is, the thickness direction of the equipment cabinet 3. The four storage cavities 31 are distributed in two layers and two rows in the equipment cabinet 3, and a power supply 1 and a needle bed actuator 2 are arranged in each storage cavity 31.

[0030] In this way, by distributing the storage cavities 31 in two layers and two columns in the equipment cabinet 3, each storage cavity 31 forms an installation space for the power supply 1 and the needle bed actuator 2 in the equipment cabinet 3, thereby achieving full utilization of the internal space of the equipment cabinet 3. In this way, multiple power supplies 1 and needle bed actuators 2 can be integrated inside the equipment cabinet 3 to improve the integration of the lithium battery capacity division device, thereby reducing the volume of the lithium battery capacity division device to a certain extent.

[0031] Optionally, combined Figure 1 As shown, the needle bed actuator 2 includes an upper frame 22, a middle frame 23, a lower frame 24 and a lifting cylinder 25 distributed along the height direction of the storage cavity 31, the power supply 1 is installed on the top of the upper frame 22, the probe 21 is facing the middle frame 23, the lifting cylinder 25 is located between the middle frame 23 and the lower frame 24, and is driven and connected to the middle frame 23, the top of the middle frame 23 is used to accommodate the battery, and the lifting cylinder 25 is used to drive the middle frame 23 to move toward the upper frame 22 so that the battery electrode can dock with the probe 21.

[0032] Specifically, in any storage cavity 31, the lower frame 24 is fixed at the bottom of the storage cavity 31, the upper frame 22 is fixed above the lower frame 24, the middle frame 23 is located between the upper frame 22 and the lower frame 24, and a battery tray is provided on the middle frame 23 to mount the battery through the battery tray. The lifting cylinder 25 is located between the middle frame 23 and the lower frame 24 and is connected to the middle frame 23. When in use, the battery is placed on the battery tray of the middle frame 23, and the lifting cylinder 25 drives the middle frame 23 to move upward toward the upper frame 22 to dock the battery motor with the probe 21 facing the middle frame 23, and the power supply 1 charges or discharges the battery.

[0033] In this way, the power supply 1 is installed on the top of the upper frame 22, and the probe 21 is directed toward the middle frame 23, so that the probe 21 is downward, and then the lifting cylinder 25 is located between the middle frame 23 and the lower frame 24, and is driven and connected to the middle frame 23. The top of the middle frame 23 is used to accommodate the battery, and the lifting cylinder 25 is used to drive the middle frame 23 to move toward the upper frame 22 so that the battery electrode can be docked with the probe 21. In this way, the docking of the battery and the probe 21 can be achieved by the drive of the lifting cylinder 25, thereby improving the docking efficiency of the battery and the probe 21.

[0034] Optionally, combined Figure 1As shown, the power supply 1 includes an AC / DC power supply 11 and two groups of DC / DC power supplies 12 installed on an upper frame 22. The output end of the AC / DC power supply 11 is connected between the input ends of the two groups of DC / DC power supplies 12 through a copper bar, and the output ends of the two groups of DC / DC power supplies 12 are respectively connected to corresponding probes 21.

[0035] Specifically, the needle bed actuator 2 may also include a needle bed, on which a plurality of probes 21 are arranged, and the output ends of the AC / DC power supply 11 and the two DC / DC power supplies 12 are respectively connected to the corresponding probes 21, and the output end of the AC / DC power supply 11 is connected between the input ends of the two DC / DC power supplies 12 through a copper bar. During the charging process of the lithium battery when the capacity is divided, the AC / DC power supply 11 converts the alternating current into direct current to charge the DC / DC power supply 12, and the DC / DC power supply 12 charges the battery through the probes 21.

[0036] In this way, by connecting the copper bar between the input end of the DC / DC power supply 12 and the output end of the AC / DC power supply 11, the conversion efficiency during the charging and discharging process can be improved.

[0037] Optionally, combined Figure 1 As shown, the DC / DC power supply 12 is arranged to be horizontally movable on the upper frame 22.

[0038] Specifically, the horizontal movable setting of the DC / DC power supply 12 on the upper frame 22 means that the DC / DC power supply 12 can move along the length direction of the upper frame 22 or along the width direction of the upper frame 22 .

[0039] In this way, by setting the DC / DC power supply 12 horizontally on the upper frame 22 for horizontal movement, the horizontal position of the DC / DC power supply 12 on the upper frame 22 can be adjusted, so that the position of the probe 21 can be adjusted by utilizing the movement of the DC / DC power supply 12, so that the probe 21 can meet the electrode connection requirements of different batteries, thereby improving the use flexibility of the lithium battery capacity division equipment.

[0040] Optionally, combined Figure 1 As shown, two power distribution cabinets 32 are further arranged in the equipment cabinet 3 . The two power distribution cabinets 32 are located between two rows of storage cavities 31 and are used to supply power to the power sources 1 in the two rows of storage cavities 31 , respectively.

[0041] Specifically, the output ends of the two power distribution cabinets 32 are respectively connected to the input ends of the power sources 1 in the two rows of storage cavities 31 through copper bus bars to supply power to the power sources 1 .

[0042] In this way, by positioning two power distribution cabinets 32 between two rows of storage cavities 31 and respectively serving to supply power to the power sources 1 in the two rows of storage cavities 31 , the power distribution cabinet 32 ​​is integrated in the equipment cabinet 3 . In this way, the power source 1 can be supplied with power in the equipment cabinet 3 , thereby improving the integration of the equipment cabinet 3 .

[0043] Optionally, combined Figure 1 As shown, a cooling fan 4 and a surface cooler 5 are provided on the inner wall of the storage cavity 31 which is flush with the power supply 1. The air outlet of the cooling fan 4 faces the battery, and the air inlet of the cooling fan 4 faces the surface cooler 5. The surface cooler 5 is used to pass cooling water.

[0044] Specifically, the upper space of the storage cavity 31 is defined as the power module area, and the power supply 1, the cooling fan 4 and the surface cooler 5 are all located in the power module area. An air duct is arranged on the side wall of the power module area, and the cooling fan 4 and the surface cooler 5 are both installed in the air duct. The height of the cooling fan 4 and the surface cooler 5 in the storage cavity 31 is flush with the height of the power supply 1. The surface cooler 5 has a water inlet and a water outlet, and the water inlet and the water return outlet are respectively connected to the cold water pipeline externally arranged in the storage cavity 31. Cold water flows in from the water inlet, takes away the heat after heat exchange through the surface cooler 5, and flows out from the water outlet. The cooling fan 4 is arranged next to the surface cooler, and the air outlet of the cooling fan 4 is aligned with the power module area, and the air inlet of the cooling fan 4 faces the surface cooler 5. The cooling fan 4 blows the air cooled by the surface cooler 015 into the power module area to reduce the temperature around the power supply 1 and the battery.

[0045] In this way, a cooling fan 4 and a surface cooler 5 for passing cooling water are arranged on the inner wall of the storage cavity 31 which is flush with the power supply 1, and the air outlet end of the cooling fan 4 is directed toward the battery, and the air inlet end of the cooling fan 4 is directed toward the surface cooler 5. The cooling fan 4 blows the air after heat exchange in the surface cooler 5 toward the power supply 1. In this way, heat exchange in the storage cavity 31 is achieved to avoid the increase in the internal temperature of the storage cavity 31 affecting the lithium battery capacity division, thereby improving the reliability of the lithium battery capacity division equipment.

[0046] Optionally, combined Figure 1 As shown, a circulation fan 6 is also provided in the storage cavity 31, and the circulation fan 6 is located at the bottom of the storage cavity 31, the air inlet end of the circulation fan 6 faces the power supply 1, and the air outlet end of the circulation fan 6 is connected to the air inlet end of the cooling fan 4 through the air duct.

[0047] Specifically, when the lithium battery is divided into different capacities, the circulating fan 6 draws the bottom air of the storage cavity 31 through the air duct to the air inlet end of the cooling fan 4, so as to exchange heat through the surface cooler 5 at the air inlet end of the cooling fan 4, and the air after heat exchange is blown by the cooling fan 4 to the power supply 1 and the battery.

[0048] In this way, the air inlet end of the circulation fan 6 located at the bottom of the storage cavity 31 is directed toward the power supply 1, and the air outlet end of the circulation fan 6 is connected with the air inlet end of the cooling fan 4 through the air duct. The circulation fan 6 realizes the flow of air from the bottom of the storage cavity 31 to the air inlet end of the cooling fan 4, so that heat can be exchanged through the surface cooler 5 at the air inlet end of the cooling fan 4 to realize a cooling cycle inside the storage cavity 31, thereby ensuring the uniformity of the temperature inside the storage cavity 31 and reducing the influence of the temperature difference inside the storage cavity 31 on the capacity distribution of the lithium batteries.

[0049] Optionally, combined Figure 1 As shown, two groups of DC / DC power supplies 12 are respectively connected to the upper frame 22.

[0050] Specifically, the positions of the two groups of DC / DC power supplies 12 on the upper frame 22 are adjustable. The upper frame 22 is provided with multiple card slots. The two groups of DC / DC power supplies 12 are respectively provided with card blocks. When the card blocks are engaged with the corresponding card slots, the two groups of DC / DC power supplies 12 are fixed on the upper frame 22.

[0051] In this way, the two groups of DC / DC power supplies 12 are respectively connected to the upper frame 22 to facilitate the fixation of the two groups of DC / DC power supplies 12 on the upper frame 22. In this way, after the horizontal positions of the two groups of DC / DC power supplies 12 are adjusted, the stability of the two groups of DC / DC power supplies 12 can be improved.

[0052] Optionally, combined Figure 1 As shown, the two groups of DC / DC power supplies 12 are slidably connected to the upper frame 22 respectively.

[0053] Specifically, the upper frame 22 is provided with a first slide, the length direction of the first slide is consistent with the depth direction of the storage cavity 31, and the DC / DC power supply 12 moves along the first slide through a roller or a slider, so that the DC / DC power supply 12 can move forward and backward along the depth direction of the storage cavity 31, and / or, the upper frame 22 is provided with a second slide, the length direction of the second slide is consistent with the width direction of the storage cavity 31 (the width direction of the storage cavity 31 is the X-axis), and the DC / DC power supply 12 slides on the second slide.

[0054] In this way, the two groups of DC / DC power supplies 12 are respectively slidably connected to the upper frame 22 to achieve adjustable horizontal positions of the two groups of DC / DC power supplies 12 on the upper frame 22. In this way, during the process of adjusting the horizontal positions of the two groups of DC / DC power supplies 12, the movement of the two groups of DC / DC power supplies 12 can be easily guided to ensure the efficiency of the horizontal position adjustment of the two groups of DC / DC power supplies 12.

[0055] Although the utility model is disclosed as above, the protection scope of the utility model is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the utility model, and these changes and modifications will fall within the protection scope of the utility model.

Claims

1. A lithium battery capacity dividing device, characterized in that: The invention comprises a power supply (1) and a needle bed actuator (2), wherein the power supply (1) is mounted on the needle bed actuator (2), a probe (21) is provided at the output end of the power supply (1), and the needle bed actuator (2) is used to carry a battery and drive the battery and the power supply (1) to move relative to each other so that the battery contacts the probe.

2. The lithium battery capacity dividing device according to claim 1, characterized in that: It also comprises an equipment cabinet (3), wherein a storage cavity (31) is arranged in the equipment cabinet (3), and the storage cavity (31) is distributed in two layers and two rows in the equipment cabinet (3), and the power supply (1) and the needle bed actuator (2) are arranged in any of the storage cavity (31).

3. The lithium battery capacity dividing device according to claim 2, characterized in that: The needle bed actuator (2) comprises an upper frame (22), a middle frame (23), a lower frame (24) and a lifting cylinder (25) distributed along the height direction of the storage cavity (31); the power supply (1) is installed on the top of the upper frame (22); the probe (21) passes through the upper frame (22) and extends toward the middle frame (23); the lifting cylinder (25) is located between the middle frame (23) and the lower frame (24) and is drivingly connected to the middle frame (23); the top of the middle frame (23) is used to accommodate a battery; the lifting cylinder (25) is used to drive the middle frame (23) to move toward the upper frame (22) so that the electrode of the battery is docked with the probe (21).

4. The lithium battery capacity dividing device according to claim 3, characterized in that: The power supply (1) comprises an AC / DC power supply (11) and two groups of DC / DC power supplies (12) mounted on the upper frame (22); the output end of the AC / DC power supply (11) is connected between the input ends of the two groups of DC / DC power supplies (12) via a copper bar; and the output ends of the two groups of DC / DC power supplies (12) are respectively connected to the corresponding probes (21).

5. The lithium battery capacity dividing device according to claim 4, characterized in that: The horizontal position of the DC / DC power supply (12) on the upper frame (22) is adjustable.

6. The lithium battery capacity dividing device according to claim 2, characterized in that: Two power distribution cabinets (32) are also arranged in the equipment cabinet (3). The two power distribution cabinets (32) are located between two rows of storage cavity bodies (31) and are respectively used to supply power to the power sources (1) in the two rows of storage cavity bodies (31).

7. The lithium battery capacity dividing device according to claim 3, characterized in that: A cooling fan (4) and a surface cooler (5) are provided on the inner wall of the storage cavity (31) which is flush with the power supply (1); the air outlet of the cooling fan (4) faces the power supply (1), and the air inlet of the cooling fan (4) faces the surface cooler; the surface cooler (5) is used for passing cooling water.

8. The lithium battery capacity dividing device according to claim 7, characterized in that: A circulation fan (6) is also provided in the storage cavity (31), and the circulation fan (6) is located at the bottom of the storage cavity (31). The air inlet end of the circulation fan (6) faces the power supply (1), and the air outlet end of the circulation fan (6) is connected to the air inlet end of the heat dissipation fan (4) through an air duct.

9. The lithium battery capacity dividing device according to claim 5, characterized in that: The two groups of DC / DC power supplies (12) are respectively connected to the upper frame (22).

10. The lithium battery capacity dividing device according to claim 5, characterized in that: The two groups of DC / DC power supplies (12) are respectively slidably connected to the upper frame (22).

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