CN202169252U - Lithium ion secondary battery sorting equipment - Google Patents

Abstract

The utility model discloses a secondary battery sorting device for lithium ions, which is characterized in that it comprises a plurality of battery modules, a limit trolley for moving the battery modules, a parallel test platform with parallel voltage probes and a series A series test platform for current and voltage probes. Each group of battery modules is composed of a plurality of single cells, and is clamped and fastened by a locking mechanism to form a module structure. The parallel and series test platforms are respectively equipped with a A template. A probe is provided on the template corresponding to the positive and negative electrodes of each single cell, and each template is connected to a corresponding test platform through a lifting mechanism. The utility model realizes the consistency of parameters in the group through the modular test, ensures the service life of the combined battery, facilitates battery sorting, and is suitable for large-scale production.

Description

Lithium-ion secondary battery sorting equipment

technical field

The utility model relates to a battery sorting and testing device, in particular to a lithium ion secondary battery sorting device.

Background technique

The secondary sorting of batteries is to sort secondary batteries according to various parameters such as different capacities, characteristic curves, and internal resistance, and select batteries with similar battery characteristics to pair and combine them into combined batteries to ensure that the combined batteries are service life.

Common sorting equipment for lithium-ion secondary batteries is mostly independently controlled by a single point, that is, there are about 150 control points on each device, and each battery is independently charged and discharged on the device. The device has the following points insufficient:

(1) The cost of equipment is high, and multiple constant current and constant voltage sources need to be connected and used;

⑵. Single-point independent control requires manual loading and unloading of batteries, which is prone to errors and cannot guarantee the accuracy of battery sorting. At the same time, it is not easy to automate operations and is only suitable for small-scale production;

(3) The maintenance workload of the equipment is heavy;

⑷. The equipment uses electronic components, which are easy to age and damage, and the stability of the equipment is poor;

⑸. The charging and discharging of the equipment must use the mains power, which is a big waste of resources;

⑹. The sorting ability of lithium-ion secondary batteries is insufficient, and only simple capacity sorting of lithium-ion secondary batteries can be carried out, and the detection and sorting of internal resistance cannot be taken into account.

Contents of the invention

The purpose of the utility model is to provide a lithium-ion secondary battery sorting equipment, which can detect multiple batteries at the same time, is easy to realize automatic operation, is suitable for large-scale production, and simultaneously takes into account the capacity and internal resistance of the battery. , greatly improving the quality of the battery pack.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a lithium ion secondary battery sorting equipment, including a plurality of battery modules, a limit trolley for moving the battery modules, and a parallel test with parallel voltage probes platform and a series test platform with series current and voltage probes, each group of battery modules is composed of a plurality of single cells, and is clamped and buckled by a locking mechanism to form a module structure, and the parallel and series test platforms A template is respectively provided on the template, and a probe is provided on the template corresponding to the positive and negative electrodes of each single cell, and each template is connected to the corresponding test platform through a lifting mechanism.

In the above technical solution, the battery module is composed of a plurality of single battery cells arranged and combined, and is bound by a locking mechanism. Move on the two stations and test separately. During the test, the template is pressed down by the lifting mechanism, the probes on the template are connected to the positive and negative electrodes on the cell, the control switch is turned on, all the cells are tested through the software and the electronic control part, and the charge and discharge are performed on the series test platform To meet the specified requirements, the voltage leveling is carried out on the parallel test platform, and the voltage of each single cell is measured. Through series constant current charging, constant resistance discharge, and recording the voltage at the end of battery discharge to match the group, to achieve consistency within the battery pack.

In the above technical solution, the locking mechanism is composed of a box body and lock pieces arranged on both sides of the box body, the side of the box body corresponding to the lock piece is provided with a flip cover, and the flip cover is provided with the lock piece. Fitting hooks. Modular design, the single cell is clamped in the box, which effectively improves the capacity and efficiency of the battery module.

In the above technical solution, the limit trolley includes a platform and wheels at the bottom of the platform, the middle of the platform is the battery module placement area, a top plate is provided on one side of the platform, and an adjustment handwheel is provided on the other side. The prior art is adopted for adjusting the handwheel, and the battery module is clamped by turning the handwheel.

In the above technical solution, the lifting mechanism is composed of a manual pressing handle or a cylinder or a cam. Press the template down manually or pneumatically to make the probes contact with the electrodes of the battery cell. After the test is over, lift the template again, and the battery module exits the test state.

Due to the use of the above technical solutions, the utility model has the following advantages compared with the prior art:

1. Since the utility model assembles a plurality of single cells into a battery module through a locking mechanism, a plurality of battery modules are combined together by a limit trolley, and they are placed together on a series and parallel test platform for testing and recording. The voltage at the end of discharge is used to match the group to achieve the consistency of parameters in the battery pack, ensure the service life of the combined battery, and facilitate sorting; at the same time, the modular test method simplifies the entire equipment and is easy to realize automatic operation. It is suitable for large-scale production. need;

2. The battery module is moved on different stations by the limit trolley, and the measurement of charge and discharge, flat voltage and self-discharge can be carried out. The operation is convenient, and at the same time, the capacity and internal resistance of the battery are taken into account, which greatly improves the battery the quality of the group;

3. Multiple battery cells are combined into a battery module for testing. Only one constant current and constant voltage source is needed for charging and discharging, and the cost is low;

4. The energy consumption of the equipment is small, and the energy during discharge can be converted to another equipment through DC-DC, which is more conducive to the utilization of energy;

5. The equipment is simple, reliable, high stability and low maintenance cost;

6. Modular design, the single battery cell is in a clamped state in the box through the cooperation of the lock piece and the hook, which effectively improves the capacity and efficiency of the battery module.

Description of drawings

Fig. 1 is a schematic structural diagram of a battery module in Embodiment 1 of the present utility model;

Fig. 2 is the top view of Fig. 1;

Fig. 3 is a schematic diagram of the structure of the position-limiting trolley after the battery module is installed in Embodiment 1 of the present utility model;

Fig. 4 is the top view of Fig. 3;

Fig. 5 is a schematic diagram of the utility model embodiment one used on the series test platform;

Figure 6 is a top view of Figure 5;

Fig. 7 is a top view of Embodiment 1 of the present invention when it is used on a parallel test platform.

Among them: 1. Battery module; 2. Limiting trolley; 3. Parallel test platform; 4. Series test platform; 5. Single cell; 6. Template; 7. Probe; 8. Box; 9. Lock 10. Flip cover; 11. Hook; 12. Partition plate; 13. Platform; 14. Wheel; 15. Top plate; 16. Adjusting handwheel; 17. Compression handle.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Embodiment 1: As shown in Figures 1 to 7, a lithium-ion secondary battery sorting equipment includes five battery modules 1, a limit trolley 2 for moving the battery modules 1, and a parallel voltage probe with parallel voltage probes. The test platform 3 and the series test platform with series current and voltage probes, each set of battery modules 1 is composed of 24 single cells 5, which are clamped and fastened by a locking mechanism to form a module structure, the A template 6 is respectively provided on the parallel and series test platforms, and a probe 7 is provided on the template 6 corresponding to the positive and negative electrodes of each single cell 5, and each template 6 is connected to the corresponding test platform via a lifting mechanism. .

As shown in Figures 1 and 2, the locking mechanism is composed of a box body 8 and lock pieces 9 arranged on both sides of the box body 8, and the side of the box body 8 corresponding to the lock piece 9 is provided with a flip cover 10, the flip cover 10 is provided with a hook 11 that cooperates with the locking member 9 . There is a partition plate 12 in the middle of the box body 8, so that the inner cavity of the box body 8 is divided into 2 rows, and 12 single cells 5 are placed in each row, and the hook 11 on the flip cover 10 and the lock piece 9 on the side plate are placed in each row. Cooperating with the locking box 8 , the single cell 5 is in a clamped state in the box 8 , which effectively improves the capacity and efficiency of the battery module 1 .

As shown in Figures 3 and 4, the position-limiting trolley 2 includes a platform 13 and wheels 14 at the bottom of the platform 13, the middle of the platform 13 is the storage area for the battery module 1, and a top plate 15 is provided on one side of the platform 13 for fixing On the platform 13, an adjustment hand wheel 16 is provided on the other side, and the battery module 1 is tightened by turning the hand wheel to ensure that each electrode of the 120 single cells 5 is in good contact with the probe 7.

As shown in Figure 5, the lifting mechanism is a manual compression handle 17 (can also be realized by a cam driven by a cylinder). By pressing down on the handle, the voltage template 6 is pushed down until 240 probes 7 and corresponding The battery electrodes are in good contact.

when using it:

(1) Pack 120 single cells 5 into five battery modules 1 box body 8, each module has a total of 24 single cells 5, divided into two rows (see Figures 1 and 2);

(2) Place the five sets of battery modules 1 on the movable limit trolley 2, and adjust them in place by adjusting the handwheel 16 (see Figures 3 and 4);

(3) Move the limit trolley 2 to the charging and discharging template 6 of the series test platform 4. The template 6 is equipped with 240 current and voltage probes 7 (the current and voltage probes are connected in series through wires), and the clamping handle 17 is used to press down the Template 6, at this time, the positive and negative electrodes of each single battery cell 5 are in contact with 240 current and voltage probes 7, the control switch is turned on, and 120 single battery cells 5 are charged or discharged to the specified requirements through the software and electronic control part (See Figures 5 and 6);

(4) After the charging or discharging is completed, the template 6 is reset, and then the limit trolley 2 is moved to the next station under the template 6 of the parallel test platform 3. The template 6 is equipped with 240 voltage probes 7. It is required to be divided into two groups, 120 in each group to be connected in parallel, and the template 6 is also pressed down by pressing the handle 17. At this time, the positive and negative poles of each cell are in contact with 240 voltage probes 7, and the control switch is turned on. The software and electronic control part level the voltage of 120 batteries (see Figure 7), and measure the voltage of each single battery 5;

⑸ Matching according to the voltage of each cell.

Claims (4)

1. the secondary cell screening installation of a lithium ion; It is characterized in that: comprise a plurality of battery modules; The spacing dolly of mobile battery module, and the parallelly connected test platform and the series connection test platform that has the series current voltage probe that have the shunt voltage probe, each is organized said battery module and is made up of a plurality of monomer electricity cores; And clamp by retaining mechanism and to be buckled into a modular structure; Said parallel connection is respectively equipped with a template with series connection on the test platform, and corresponding each monomer electricity core positive and negative electrode is provided with a probe on the said template, and each said template is connected with test platform accordingly through an elevating mechanism.

2. the secondary cell screening installation of lithium ion according to claim 1; It is characterized in that: retaining mechanism is made up of casing and the snap close piece that is arranged at the casing both sides; One side of the corresponding snap close piece of said casing is provided with renovates, and this is renovated and is provided with the grab that cooperates with said snap close piece.

3. the secondary cell screening installation of lithium ion according to claim 1; It is characterized in that: said spacing dolly comprises the wheel of platform and platform bottom; The centre of said platform is said battery module rest area, and platform one side is provided with top board, and opposite side is provided with adjusting handle.

4. the secondary cell screening installation of lithium ion according to claim 1 is characterized in that: said elevating mechanism is one to be made up of manual pressing handle or cylinder or cam.

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