Small steel shell battery formation jig and battery negative pressure formation device

Abstract

The utility model discloses a small steel shell battery formation jig and a battery negative pressure formation device, the small steel shell battery formation jig comprises a battery fixing assembly, the battery fixing assembly is used for fixing a battery to be formed; the test switching assembly comprises a probe fixing plate, a switching block, an electrode pressing block and a negative pressure suction nozzle adapter, the switching block, the electrode pressing block and the negative pressure suction nozzle adapter are arranged on the probe fixing plate, the probe fixing plate is arranged on the end face of one side of the battery fixing assembly, the switching block is used for being connected with a probe, the electrode pressing block is in contact with and connected with a pole of the battery, and the negative pressure suction nozzle adapter is arranged on the probe fixing plate. The electrode pressing block is electrically connected with the adapter block, one end, close to the battery, of the negative pressure suction nozzle adapter is communicated to a battery liquid injection hole, and one end, far away from the battery, of the negative pressure suction nozzle adapter is connected to a negative pressure suction nozzle. The device has the advantages that the alignment precision of the probe and the battery pole is high, and the negative pressure formation efficiency is high.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production and manufacturing, in particular to a small steel shell battery formation fixture and a battery negative pressure formation device. Background Art

[0002] Lithium batteries have the advantages of high energy, small size, light weight, high specific energy, and good safety performance. They are widely used in new energy vehicles, mobile terminals and other products. After the lithium battery is assembled, it needs to undergo processes such as formation. The lithium battery formation is to use current probes and voltage probes to charge and discharge the battery under certain conditions, thereby activating the active substances on the battery electrodes, and forming a dense film on the surface of the battery anode to protect the entire chemical interface. Some specifications of lithium batteries, such as square shell lithium batteries and some cylindrical lithium batteries, need to add negative pressure processes during the formation process to avoid swelling and dimensional deformation of the lithium battery. Negative pressure formation requires the timely removal of the gas generated in the formation process to ensure the stability and consistency of the SEI film.

[0003] The existing small steel shell batteries have different specifications, which makes it difficult to perform the formation operation because the current probe and voltage probe on the formation box cannot be adapted to the battery. In addition, the negative pressure formation operation cannot be performed because the injection holes of some batteries are small and cannot meet the negative pressure function.

[0004] In view of this, the purpose of the utility model is to provide a new technical solution to solve the existing technical problems. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, the utility model provides a small steel shell battery formation fixture, which solves the problem that during negative pressure formation, the probe and negative pressure nozzle of the formation box cannot be fully adapted to the small steel shell battery, resulting in the inability to perform negative pressure formation operations.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A small steel shell battery formation jig, comprising:

[0008] A battery fixing assembly, the battery fixing assembly is used to fix the battery to be formed;

[0009] A test adapter assembly, the test adapter assembly includes a probe fixing plate and an adapter block, an electrode pressing block and a negative pressure nozzle adapter arranged on the probe fixing plate, the probe fixing plate is arranged on one side end face of the battery fixing assembly, the adapter block is used to conduct with the probe, the electrode pressing block contacts and conducts with the pole of the battery, the electrode pressing block is electrically connected to the adapter block, the end of the negative pressure nozzle adapter close to the battery is connected to the battery filling hole, and the end of the negative pressure nozzle adapter away from the battery is connected to the negative pressure nozzle.

[0010] In the above structure, the battery fixing assembly includes a fixing lining and a carrier, the fixing lining is provided with a recess, the carrier is installed in the recess, and the carrier is provided with a battery receiving groove for fixing the battery on a side facing away from the fixing lining, and the surface of the battery receiving groove is insulated from the battery.

[0011] In the above structure, a compression spring is arranged between the fixed lining and the probe fixing plate, and a guide column is fixedly connected to one end surface of the fixed lining facing the probe fixing plate. The compression spring is sleeved on the guide column, and one end of the compression spring is fixedly connected to one end surface of the fixed lining, and the other end is fixedly connected to the probe fixing plate. The compression spring presses the probe fixing plate to the fixed lining.

[0012] In the above structure, a positioning bead is provided on one side of the fixed liner, and the positioning bead is used to limit the position of the carrier.

[0013] In the above structure, the probe fixing plate is provided with a U-shaped groove, and the U-shaped groove extends along the length direction of the probe fixing plate, and the electrode pressing block is slidably connected to the U-shaped groove.

[0014] In the above structure, the fixed liner is provided with two recesses, the two recesses are provided at intervals on the surface of the fixed liner, and a carrier is installed on each of the recesses.

[0015] In the above structure, a handle is also included, and the handle is fixedly arranged on one side of the fixed lining.

[0016] The utility model also provides:

[0017] A battery negative pressure formation device comprises a small steel shell battery formation jig with the structure as described above.

[0018] The beneficial effects of the utility model are as follows: by arranging a negative pressure nozzle adapter, the problem that the battery filling hole is small and cannot meet the negative pressure function is solved, and the negative pressure gas removal effect is effectively improved; by arranging a test adapter component, the problem of the accuracy of the current probe and the voltage probe of the formation box contacting the battery pole is solved, and the negative pressure formation efficiency of the battery is effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the disassembly of the battery fixing assembly of the utility model;

[0022] Figure 3 It is a schematic diagram of the disassembly of the test adapter component of the utility model.

[0023] Reference numerals:

[0024] 1. Battery fixing assembly; 11. Fixing lining; 111. Recess; 112. Positioning bead; 12. Carrier; 121. Battery receiving slot;

[0025] 2. Probe fixing plate; 21. Fixing upper plate; 22. Fixing lower plate; 221. U-shaped groove;

[0026] 3. Adapter block;

[0027] 4. Electrode briquetting;

[0028] 5. Negative pressure nozzle adapter;

[0029] 6. Guide column;

[0030] 7. Handle;

[0031] 8. Battery. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-3 The utility model is further described.

[0033] The following will clearly and completely describe the concept, specific structure and technical effects of the utility model in combination with the embodiments and drawings, so as to fully understand the purpose, characteristics and effects of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, other embodiments obtained by technicians in this field without creative work are all within the scope of protection of the utility model. In addition, all the connection / connection relationships involved in the patent do not refer to the direct connection of components, but refer to the formation of a better connection structure by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the creation of the utility model can be combined interchangeably without conflicting with each other.

[0034] Reference Figures 1 to 3 A small steel shell battery formation jig is used to match the existing formation box so as to perform negative pressure formation operation on the battery 8. It includes a battery fixing component 1 and a test adapter component, wherein the battery fixing component 1 is used to fix the battery 8 to be formed, and the test adapter component is arranged on the battery fixing component 1. The test adapter component is electrically connected to the battery 8 to be formed for subsequent formation operation.

[0035] The battery fixing assembly 1 includes a fixed lining 11 and a carrier 12. The fixed lining 11 is provided with a recess 111. The carrier 12 is installed in the recess 111. The shape and size of the recess 111 match the shape and size of the carrier 12. The carrier 12 is provided with a battery receiving groove 121 on the side facing away from the fixed lining 11. The lithium battery 8 to be negatively pressurized is installed in the battery receiving groove 121. Specifically, one side of the fixed lining 11 is provided with a lining opening connected to the recess 111. The carrier 12 can slide into the recess 111 from the lining opening of the fixed lining 11. The carrier 12 is also provided with a receiving opening connected to the battery receiving groove 121. The lithium battery 8 can slide into the battery receiving groove 121 from the receiving opening of the carrier 12. The receiving opening of the carrier 12 and the lining opening of the fixed lining 11 are located on the same side. The surface of the battery receiving groove 121 is insulated from the battery 8.

[0036] A positioning bead 112 is provided on one side of the fixed liner 11. The positioning bead 112 is used to limit and fix the carrier 12 to reduce the possibility of the carrier 12 being separated from the fixed liner 11 during use. In this embodiment, the positioning bead 112 is a ball head plunger with a spring. Specifically, the positioning bead 112 is threadedly connected to one side of the fixed liner 11. When the carrier 12 is installed, when the carrier 12 is installed into the installation recess 111 from the liner opening, the ball head of the positioning bead 112 is pressed against the side of the carrier 12 under the elastic force of the spring, and the carrier 12 is fixed in the recess 111 of the fixed liner 11.

[0037] Reference Figure 2 and Figure 3The test adapter assembly includes a probe fixing plate 2, an adapter block 3, an electrode pressing block 4 and a negative pressure suction nozzle adapter 5. The probe fixing plate 2 is arranged on one side of the battery fixing assembly 1. Specifically, the probe fixing plate 2 is arranged on the end face of the fixed lining 11 close to the lining opening; the adapter block 3 is detachably fixed to the side of the probe fixing plate 2 away from the fixed lining 11, and the adapter block 3 is used to contact and conduct with the probe; the electrode pressing block 4 is arranged on the side of the probe fixing plate 2 close to the fixed lining 11. When in use, the side of the electrode pressing block 4 close to the fixed lining 11 is pressed against the lithium battery 8 to be negatively pressure formed, and is in contact with and conducted with the pole of the battery 8; the negative pressure suction nozzle adapter 5 is fixedly arranged on the probe fixing plate 2, and the end of the negative pressure suction nozzle close to the battery 8 extends into the injection hole of the battery 8 and is connected to the injection hole. The end of the negative pressure suction nozzle adapter 5 away from the battery 8 is connected to the negative pressure suction nozzle of the formation box, so as to timely discharge the gas generated inside the battery 8 during the negative pressure formation process to ensure the stability and consistency of the SEI film. The adapter block 3 and the electrode pressing block 4 are provided to improve the alignment accuracy between the current probe, that is, the voltage probe and the pole of the battery 8, which can effectively reduce the possibility that the current probe and the voltage probe on the formation box cannot be adapted to the battery 8 due to differences in specifications or sizes of the battery 8, resulting in the inability to smoothly carry out the formation; similarly, the negative pressure suction nozzle adapter 5 is provided to effectively reduce the possibility that the gas generated by the negative pressure formation in the battery 8 cannot be smoothly removed due to different specifications of the negative pressure suction nozzles or the battery injection hole is too small.

[0038] In this embodiment, the probe fixing plate 2 includes a fixed upper plate 21 and a fixed lower plate 22, and the fixed upper plate 21 and the fixed lower plate 22 are detachably fixedly connected. Specifically, the fixed upper plate 21 and the fixed lower plate 22 can be fixedly connected by bolts. The fixed upper plate 21 is provided with a mounting groove for installing the adapter block 3, and the adapter block 3 is detachably arranged in the mounting groove of the fixed upper plate 21, and two groups of adapter blocks 3 are respectively arranged corresponding to each battery 8, and each group is respectively provided with two adapter blocks 3, and the two adapter blocks 3 in each group are respectively in contact with and conductive with the current probe and the voltage probe of the formation box. The electrode pressing block 4 is arranged in the fixed lower plate 22. Specifically, the fixed lower plate 22 is provided with a U-shaped groove 221, and the U-shaped groove 221 extends along the length direction of the probe fixing plate 2. The electrode pressing block 4 is arranged in the U-shaped groove 221, and the electrode pressing block 4 can slide left and right in the length direction of the fixed lower plate 22 in the U-shaped groove 221. The electrode pressing block 4 slides in the U-shaped groove 221, and the position of the electrode pressing block 4 can be adjusted to ensure that the electrode pressing block 4 can be accurately pressed against the battery pole during use, which is beneficial to the negative pressure formation operation. In actual use, after determining the position of the electrode pressing block 4, the electrode pressing block 4 can be fixed in the U-shaped groove 221 by bolts, etc. The probe fixing plate 2 is provided with two electrode pressing blocks 4 corresponding to each battery 8. The two electrode pressing blocks 4 correspond to the two groups of adapter blocks 3 one by one, and are electrically connected to the adapter blocks 3 of the corresponding groups. Specifically, the electrical connection between the adapter blocks 3 and the electrode pressing blocks 4 can be achieved by connecting wires between the electrode pressing blocks 4 and the adapter blocks 3. The two electrode pressing blocks 4 correspond to the positive pole and the negative pole of the battery 8 respectively. When in use, the two electrode pressing blocks 4 are pressed against the positive pole and the negative pole of the battery 8 respectively and are connected to the corresponding poles. The negative pressure suction nozzle adapter 5 is fixedly arranged on the fixed lower plate 22, and the position of the negative pressure suction nozzle adapter 5 corresponds to the position of the battery injection hole. The fixed upper plate 21 is provided with an avoidance groove located above the negative pressure suction nozzle adapter 5. The avoidance groove is provided to reduce the possibility of interference between the fixed upper plate 21 and the negative pressure suction nozzle of the formation box.

[0039] In this embodiment, the fixed lining 11 is provided with two recesses 111, and the two recesses 111 are spaced apart on the surface of the fixed lining 11, and a carrier 12 is matched and installed in each recess 111, that is, a small steel shell battery formation fixture can perform negative pressure formation operations on two batteries 8 at the same time, which is beneficial to improving production work efficiency.

[0040] Reference Figure 2 and Figure 3, a compression spring (not shown in the figure) is arranged between the fixed lining 11 and the probe fixing plate 2. Specifically, a plurality of guide posts 6 are fixedly connected to the end face of the fixed lining 11 facing the probe fixing plate 2. The compression spring is sleeved on the guide post 6. The guide post 6 plays a guiding and positioning role for the compression spring. One end of the compression spring is fixedly connected to the fixed lining 11, and the other end of the compression spring is fixedly connected to the probe fixing plate 2. When the probe fixing plate 2 is installed on the upper end face of the fixed lining 11, the compression spring is in an elastic tension state, that is, the probe fixing plate 2 is pressed against the upper part of the fixed lining 11 under the elastic force of the compression spring. When installing / removing the battery 8, the probe fixing plate 2 is pulled away from the fixed lining 11 so that the probe fixing plate 2 is separated from the fixed lining 11. At this time, the receiving opening of the carrier 12 is in an open state, and the battery 8 can be installed or removed; when the installation or removal is completed, the probe fixing plate 2 is released. Due to the elastic effect of the compression spring, the probe fixing plate 2 will fall back and press down to fix the battery 8 in the carrier 12.

[0041] Reference Figure 2 A small steel shell battery formation jig also includes a handle 7, which is fixedly arranged on one side of the fixed liner 11. The handle 7 is arranged to facilitate the transportation of the small steel shell formation jig, facilitate loading and unloading during negative pressure formation operation, and is conducive to the production operation.

[0042] The implementation process of the utility model is:

[0043] When installing the battery 8, pull the test adapter assembly in the direction away from the fixed lining 11, so that the probe fixing plate 2 is separated from the fixed lining 11, and the battery 8 to be negatively pressure formed is installed in the battery receiving slot 121; release the test adapter assembly, at this time the electrode pressing block 4 is respectively pressed against the corresponding battery pole, and the negative pressure nozzle adapter 5 is connected to the battery filling hole; then make the current probe and the voltage probe contact and conduct with the adapter block 3, and use a wire to connect the electrode pressing block 4 and the adapter block 3, so that the negative pressure nozzle is connected to the negative pressure nozzle adapter 5. At this time, the installation of the battery 8 is completed and the next negative pressure formation operation can be carried out.

[0044] Based on the above structure, the utility model also provides:

[0045] A battery negative pressure formation device comprises a small steel shell battery formation jig with the structure as described above.

[0046] The above is a specific description of the preferred implementation of the utility model, but the invention of the utility model is not limited to the described embodiments. Technical personnel familiar with the field can also make various equivalent deformations or substitutions without violating the spirit of the utility model. These equivalent deformations or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A small steel shell battery formation jig, characterized in that: include: A battery fixing assembly, the battery fixing assembly is used to fix the battery to be formed; A test adapter assembly, the test adapter assembly includes a probe fixing plate and an adapter block, an electrode pressing block and a negative pressure nozzle adapter arranged on the probe fixing plate, the probe fixing plate is arranged on one side end face of the battery fixing assembly, the adapter block is used to conduct with the probe, the electrode pressing block contacts and conducts with the pole of the battery, the electrode pressing block is electrically connected to the adapter block, the end of the negative pressure nozzle adapter close to the battery is connected to the battery filling hole, and the end of the negative pressure nozzle adapter away from the battery is connected to the negative pressure nozzle.

2. A small steel shell battery formation jig according to claim 1, characterized in that: The battery fixing assembly includes a fixing lining and a carrier, the fixing lining is provided with a recess, the carrier is installed in the recess, and the carrier is provided with a battery receiving groove for fixing the battery on a side facing away from the fixing lining, and the surface of the battery receiving groove is insulated from the battery.

3. A small steel shell battery formation jig according to claim 2, characterized in that: A compression spring is arranged between the fixed lining and the probe fixing plate, and a guide column is fixedly connected to one end surface of the fixed lining facing the probe fixing plate. The compression spring is sleeved on the guide column, and one end of the compression spring is fixedly connected to one end surface of the fixed lining, and the other end is fixedly connected to the probe fixing plate. The compression spring presses the probe fixing plate to the fixed lining.

4. A small steel shell battery formation jig according to claim 2, characterized in that: A positioning bead is provided on one side of the fixed liner, and the positioning bead is used to limit the position of the carrier.

5. A small steel shell battery formation jig according to claim 1, characterized in that: The probe fixing plate is provided with a U-shaped groove, and the U-shaped groove extends along the length direction of the probe fixing plate, and the electrode pressing block is slidably connected to the U-shaped groove.

6. A small steel shell battery formation jig according to claim 2, characterized in that: The fixed liner is provided with two recesses, which are spaced apart on the surface of the fixed liner, and a carrier is installed on each of the recesses.

7. A small steel shell battery formation jig according to claim 2, characterized in that: It also includes a handle, which is fixedly arranged on one side of the fixed lining.

8. A battery negative pressure formation device, characterized in that: A small steel shell battery formation jig comprising any one of claims 1 to 7.

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