Battery formation equipment

Abstract

The present invention provides a battery formation device, which includes a negative pressure mechanism, a connecting assembly and an exhaust joint. The negative pressure mechanism has a receiving chamber inside. The exhaust joint is arranged in the negative pressure mechanism and communicated with the receiving chamber. There are multiple connecting assemblies arranged in the negative pressure mechanism, each connecting assembly is communicated with the receiving chamber and is used to connect to a battery.

Description

Technical Field

[0001] The invention relates to the field of battery production, and in particular to a battery formation device. Background Art

[0002] In the production process of lithium-ion batteries, the formation process plays a key role in the quality of the battery. During the formation process, a large amount of gas will be generated inside the battery, so a corresponding formation device is required to extract the gas in time. During the gas extraction process, the electrolyte inside the battery will also be taken out. In the known formation device, a plurality of separated cups are usually provided to store the electrolyte taken out. However, the separated cups occupy a large space and the conversion process is complicated, which seriously affects the efficiency of the battery formation process. Summary of the invention

[0003] In view of the problems existing in the background technology, the object of the present invention is to provide a battery formation device, which has good compatibility, can simplify the conversion process, and improve the efficiency of battery formation.

[0004] In order to achieve the above-mentioned object, the present invention provides a battery formation device, which includes a negative pressure mechanism, a connecting assembly and an exhaust joint. The negative pressure mechanism has a receiving chamber inside. The exhaust joint is arranged in the negative pressure mechanism and communicated with the receiving chamber. There are multiple connecting assemblies and they are arranged in the negative pressure mechanism, and each connecting assembly is communicated with the receiving chamber and is used to connect to the battery.

[0005] The negative pressure mechanism comprises a negative pressure cup body and a cover plate, a receiving chamber is formed in the negative pressure cup body, the cover plate is connected to the negative pressure cup body and seals the receiving chamber, a suction joint is connected to the cover plate, and a connecting assembly is connected to the negative pressure cup body.

[0006] The accommodating chamber includes a sub-chamber and a confluence chamber, wherein the sub-chambers are multiple and separated from each other, the confluence chamber is located on one side of the multiple sub-chambers close to the cover plate, and the confluence chamber is connected to the multiple sub-chambers. The air extraction joint is connected to the confluence chamber. Each connecting assembly is connected to a corresponding sub-chamber.

[0007] The negative pressure mechanism further includes a partition, which is accommodated in the confluence chamber. Each sub-chamber has an opening connected to the confluence chamber, and the partition only covers a part of the opening of each sub-chamber.

[0008] The negative pressure mechanism also includes a limiting component, which is connected to the partition and arranged between the partition and the cover plate.

[0009] The negative pressure cup body has a plurality of protruding connection parts at one end away from the cover plate, and the number of the connection parts is the same as the number of sub-chambers. Each connection part is located on the side of the corresponding sub-chamber away from the cover plate and has a first through hole connected to the sub-chamber. The negative pressure mechanism also includes an adapter joint and a fixing member, the adapter joint having a flange portion, a first extension portion and a second extension portion, the first extension portion extending from a side of the flange portion close to the connection portion, and the second extension portion extending from a side of the flange portion away from the connection portion. The fixing member is accommodated in the first through hole and has a second through hole, and the second through hole is connected to the sub-chamber. The flange portion is inserted into the first through hole, the first extension portion is inserted into the second through hole and is threadedly connected to the fixing member. The adapter joint has a third through hole that passes through the first extension portion, the flange portion and the second extension portion, and the third through hole is connected to the second through hole.

[0010] The flange part is provided with a notch on the periphery, and the connecting part has a protrusion extending from the hole wall of the first through hole, and the protrusion is inserted into the notch.

[0011] Each connecting assembly comprises a first connecting pipe and a suction nozzle, one end of the first connecting pipe is connected to the negative pressure mechanism, and the other end is connected to the suction nozzle.

[0012] The battery formation device further comprises a substrate, a pressure plate and a positioning block, wherein the positioning blocks are multiple and are located between the substrate and the pressure plate. The negative pressure mechanism is connected to the substrate, and the pressure plate is located on a side of the substrate away from the negative pressure mechanism and is connected to the substrate. The first connecting pipe of each connecting assembly is connected to the positioning block.

[0013] The positioning block has a main body and a protrusion, the main body is arranged between the base plate and the pressure plate, and the protrusion extends from the surface of the main body away from the pressure plate. The base plate is provided with a plurality of positioning holes, and the protrusions of each positioning block are inserted into the positioning holes. The main body is provided with a fourth through hole, and the first connecting pipe passes through the fourth through hole and is connected to the main body.

[0014] The suction nozzle is sleeved on one end of the first connecting tube, and the outer diameter of the other end of the first connecting tube away from the suction nozzle is greater than the diameter of the fourth through hole. The connecting assembly also includes a spring, which is sleeved on the first connecting tube and located between the suction nozzle and the main body.

[0015] The first connecting tube is a metal tube. The connecting assembly also includes a second connecting tube, which connects the first connecting tube and the negative pressure mechanism, and is a flexible tube.

[0016] The suction nozzle is located on a side of the pressing plate away from the base plate. The pressing plate is provided with a fifth through hole in a strip shape, and the base plate is provided with a sixth through hole in a strip shape, and the fifth through hole and the sixth through hole are respectively located on both sides of the fourth through hole. The first connecting tubes of the plurality of connecting components pass through the fifth through hole, and the sixth through hole exposes one end of the first connecting tube away from the suction nozzle.

[0017] The beneficial effects of the present invention are as follows: the present application integrates multiple connection components into a negative pressure mechanism, and uses the storage chamber of the negative pressure mechanism to store the electrolyte of multiple batteries. Therefore, compared with the known technology, the negative pressure mechanism of the present application occupies a smaller space, and the storage chamber inside it has a larger capacity, thereby improving the compatibility of the battery formation device of the present application. In addition, when the specifications of the battery change, only the connection components need to be adjusted, and there is no need to disassemble the negative pressure mechanism, thereby simplifying the replacement process and improving the efficiency of battery formation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 FIG. 4 is a schematic diagram of a battery formation device according to the present invention.

[0019] Figure 2 FIG. 4 is another schematic diagram of a battery formation device according to the present invention.

[0020] Figure 3 Schematic diagram of the negative pressure mechanism of the battery formation device according to the present invention.

[0021] Figure 4 Schematic diagram of a negative pressure cup of a negative pressure mechanism of a battery formation device according to the present invention.

[0022] Figure 5 for Figure 3 Enlarged view of circle A.

[0023] Figure 6 for Figure 3 Enlarged view at circle B.

[0024] Figure 7 Schematic diagram of the adapter connector of the battery formation device according to the present invention.

[0025] Figure 8 It is a schematic diagram of the connection between the adapter connector and the negative pressure cup body of the battery formation device according to the present invention.

[0026] Fig. 9 Schematic diagram of the connection components of the battery formation device according to the present invention.

[0027] Fig.10 Schematic diagram of a positioning block of a battery formation device according to the present invention.

[0028] Fig.11 FIG. 4 is a schematic diagram of a substrate of a battery formation device according to the present invention.

[0029] Fig.12 Schematic diagram of a pressing plate of a battery formation device according to the present invention.

[0030] The reference numerals are described as follows:

[0031] 1 Negative pressure mechanism 41 Positioning hole

[0032] 11 negative pressure cup body 42 groove

[0033] 111 connection part 5 pressure plate

[0034] 111a convex 6 positioning block

[0035] 12 cover plate 61 main body

[0036] 13 partition plate 62 protrusion

[0037] 14 limiting member 7 supporting plate

[0038] 15 adapters 8 batteries

[0039] 151 flange portion S accommodating chamber

[0040] 151a Notch S1 subchamber

[0041] 152 first extension portion S2 confluence chamber

[0042] 153 second extension portion H1 first through hole

[0043] 16 Fixing piece H2 second through hole

[0044] 2 Connect component H3 third through hole

[0045] 21 First connecting pipe H4 Fourth through hole

[0046] 22 Nozzle H5 fifth through hole

[0047] 23 Spring H6 sixth through hole

[0048] 24 Second connecting pipe X length direction

[0049] 3. Exhaust joint Y width direction

[0050] 4Substrate Z height direction DETAILED DESCRIPTION

[0051] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0052] In the description of this application, unless otherwise clearly specified and limited, the terms "first", "second", "third", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to more than two (including two); unless otherwise specified or explained, the term "connection" should be understood in a broad sense, for example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] In the description of this specification, it should be understood that the directional words such as "upper" and "lower" described in the embodiments of the present application are described from the perspectives shown in the drawings and should not be understood as limiting the embodiments of the present application. The present application is further described in detail below through specific embodiments and in conjunction with the drawings.

[0054] The battery formation device of the present application can be applied to the formation process of the battery 8, and specifically, can be used to extract the gas generated by the battery 8 during the formation process. The battery 8 can be a lithium-ion battery. The battery 8 can include a housing, an electrode assembly and an electrolyte, and the electrode assembly and the electrolyte are accommodated in the housing.

[0055] Specifically, refer to Figure 1 and Figure 2 The battery formation device of the present application includes a negative pressure mechanism 1, a connecting component 2 and an exhaust connector 3.

[0056] Reference Figure 4 , the negative pressure mechanism 1 has a containing chamber S inside. The air extraction joint 3 is provided in the negative pressure mechanism 1 and communicates with the containing chamber S. The air extraction joint 3 can be connected to an external vacuum extraction device, and the air extraction joint 3 has a passage inside that communicates with the containing chamber S. The vacuum extraction device can extract the gas in the containing chamber S through the air extraction joint 3 to keep the containing chamber S in a negative pressure state.

[0057] There are multiple connecting components 2 and they are arranged on the negative pressure mechanism 1. Each connecting component 2 is connected to the accommodating chamber S. One end of each connecting component 2 can be connected to the negative pressure mechanism 1, and the other end can be connected to the injection hole of the battery 8 (the injection hole is used to inject electrolyte during the molding process of the battery 8). The connecting component 2 has a channel inside, and the channel connects the accommodating chamber S and the inside of the battery 8.

[0058] When the battery 8 needs to be formed, each connection component 2 can be connected to the battery 8, and the exhaust connector 3 can be connected to the vacuum device. Then the battery 8 is charged and discharged, and the vacuum device is started. The battery 8 generates gas during the charging and discharging process, and the vacuum device extracts the gas generated by the battery 8 through the exhaust connector 3, the containing chamber S and the connection component 2 to prevent the gas from remaining in the electrode assembly.

[0059] However, during the process of evacuating, the electrolyte inside the battery may be carried out by the gas. The present application sets a receiving chamber S between the vacuum pumping device and the battery 8, and the electrolyte carried out by the gas can be stored in the receiving chamber S. When the formation is completed, the vacuum pumping device breaks the vacuum, and the electrolyte in the receiving chamber S flows back into the battery 8 through the connecting component 2.

[0060] In the known technology, usually an independent cup body is provided for each battery (similar to the negative pressure mechanism of the present application), and the receiving chamber of each cup body receives the electrolyte of the corresponding battery. However, there are gaps between adjacent cup bodies, resulting in multiple cup bodies occupying a large space. At the same time, the capacity of the receiving chamber of each cup body is small and the compatibility is poor. When the specifications of the battery change, multiple cup bodies need to be disassembled and assembled at the same time, resulting in a complicated replacement process, which seriously affects the efficiency of the battery formation process.

[0061] In the present application, a plurality of connection components 2 are integrated into a negative pressure mechanism 1, and the receiving chamber S of the negative pressure mechanism 1 is used to store the electrolyte of a plurality of batteries 8. Therefore, compared with the known technology, the negative pressure mechanism 1 of the present application occupies a smaller space, and the receiving chamber S inside it has a larger capacity, thereby improving the compatibility of the battery formation device of the present application. In addition, when the specifications of the battery 8 change, only the connection component 2 needs to be adjusted, and there is no need to disassemble the negative pressure mechanism 1, thereby simplifying the replacement process and improving the efficiency of the battery formation.

[0062] Reference Figure 3 The negative pressure mechanism 1 includes a negative pressure cup body 11 and a cover plate 12. The accommodating chamber S is formed in the negative pressure cup body 11. The cover plate 12 is connected to the negative pressure cup body 11 and seals the accommodating chamber S. The cover plate 12 can be connected to the negative pressure cup body 11 by bolts; a sealing ring can be provided between the cover plate 12 and the negative pressure cup body 11 to improve the sealing performance and improve the efficiency of the vacuum pumping equipment. The negative pressure cup body 11 can be injection molded by PVDF.

[0063] The cover plate 12 and the negative pressure cup body 11 can be arranged up and down along the height direction Z. The exhaust connector 3 is connected to the cover plate 12, and the connecting assembly 2 is connected to the negative pressure cup body 11. Preferably, the exhaust connector 3 is located on the upper side of the cover plate 12 along the height direction Z, and the connecting assembly 2 is located on the lower side of the negative pressure cup body 11 along the height direction Z.

[0064] The accommodating chamber S includes a sub-chamber S1 and a confluence chamber S2. The sub-chambers S1 are multiple and separated from each other. The confluence chamber S2 is located on one side of the multiple sub-chambers S1 close to the cover plate 12, and the confluence chamber S2 is connected to the multiple sub-chambers S1.

[0065] Reference Figure 3 and Figure 4 The negative pressure cup body 11 is provided with ribs inside, and the ribs separate the adjacent sub-chambers S1. The sub-chamber S1 has an opening at one end facing the cover plate 12. The confluence chamber S2 is connected with the openings of the plurality of sub-chambers S1.

[0066] The exhaust connector 3 is connected to the confluence chamber S2. When the vacuum pumping device is working, the gas in the multiple sub-chambers S1 is first collected in the confluence chamber S2 under the action of negative pressure, and then enters the vacuum pumping device through the exhaust connector 3. That is to say, by setting the confluence chamber S2, one exhaust connector 3 can exhaust multiple sub-chambers S1.

[0067] Each connecting component 2 is connected to a corresponding sub-chamber S1. Each connecting component 2 connects a battery 8 to a sub-chamber S1. During the process of evacuating gas, the electrolyte inside each battery 8 is taken out by the gas and stored in the corresponding sub-chamber S1. Since the multiple sub-chambers S1 of the negative pressure cup body 11 are separated from each other, the electrolytes in the multiple sub-chambers S1 are not easy to mix. When the formation is completed, the electrolyte in each sub-chamber S1 flows back to the original battery 8, thereby improving the consistency of the electrolyte capacity of the battery 8.

[0068] The number of sub-chambers S1 is equal to or greater than the number of connecting components 2. When the number of batteries 8 changes, it is only necessary to increase or decrease the connecting components 2 accordingly. Therefore, the battery formation device of the present application has good versatility.

[0069] Each sub-chamber S1 has an elliptical area at its lower end away from the cover plate 12, and the elliptical area has a gradually decreasing cross-sectional area, which can speed up the reflux of electrolyte into the battery 8, reduce electrolyte residue and crystallization, and reduce the risk of channel blockage of the connecting component 2 during long-term use.

[0070] Each sub-chamber S1 has an opening connected to the confluence chamber S2, so during the gas extraction process, the electrolyte in a sub-chamber S1 may be splashed into other sub-chambers S1 driven by the gas, thereby affecting the consistency of the electrolyte capacity of the battery 8. Therefore, preferably, the negative pressure mechanism 1 also includes a partition 13, which is accommodated in the confluence chamber S2, and the partition 13 only covers a part of the opening of each sub-chamber S1.

[0071] The partition 13 can be against the internal ribs of the negative pressure cup body 11. In the width direction Y, the size of the partition 13 is smaller than the size of the confluence chamber S2, that is, there is a gap between the partition 13 and the outer wall of the negative pressure cup body 11 that surrounds the confluence chamber S2.

[0072] In the present application, the partition 13 can cover a portion of the opening of each sub-chamber S1, so the partition 13 can reduce the risk of electrolyte splashing to other sub-chambers S1 and improve the consistency of the electrolyte capacity of the battery 8. In addition, the partition 13 can only cover a portion of the opening of the sub-chamber S1, so when evacuating, the gas in multiple sub-chambers S1 can still flow into the confluence chamber S2.

[0073] Reference Figure 5 The negative pressure mechanism 1 further includes a limiting member 14, which is connected to the partition 13 and is disposed between the partition 13 and the cover plate 12. The upper end of the limiting member 14 abuts against the cover plate 12, and the lower end abuts against the partition 13. During the air extraction process, the limiting member 14 can prevent the partition 13 from vibrating up and down along the height direction Z under the action of the negative pressure, and prevent the partition 13 from blocking the air extraction port of the air extraction connector 3. The limiting member 14 can be cylindrical or in other shapes, and its area is smaller than that of the partition 13; the position of the limiting member 14 should be staggered with the position of the air extraction connector 3.

[0074] The limiting member 14 may be fixed to the partition plate 13 by means of thread connection, bonding, etc., or may be integrally formed with the partition plate 13 .

[0075] Reference Figures 6 to 8 The negative pressure cup body 11 has a plurality of protruding connecting parts 111 at one end away from the cover plate 12, and the number of the connecting parts 111 is the same as the number of the sub-chambers S1. Each connecting part 111 may be cylindrical.

[0076] Each connecting portion 111 is located at a side of a corresponding sub-chamber S1 away from the cover plate 12 and has a first through hole H1 communicating with the sub-chamber S1. The first through hole H1 has a plurality of regions with different apertures.

[0077] The negative pressure mechanism 1 also includes an adapter joint 15 and a fixing member 16. The adapter joint 15 has a flange portion 151, a first extension portion 152 and a second extension portion 153. The first extension portion 152 extends from a side of the flange portion 151 close to the connecting portion 111, and the second extension portion 153 extends from a side of the flange portion 151 away from the connecting portion 111.

[0078] The fixing member 16 is received in the first through hole H1 and has a second through hole H2, and the second through hole H2 is communicated with the sub-chamber S1. The flange portion 151 is inserted into the first through hole H1, and the first extension portion 152 is inserted into the second through hole H2 and is threadedly connected to the fixing member 16. A sealing ring may be provided between the flange portion 151 and the connecting portion 111. The adapter joint 15 has a third through hole H3 that passes through the first extension portion 152, the flange portion 151, and the second extension portion 153, and the third through hole H3 is communicated with the second through hole H2.

[0079] The present application can simplify the connection process between the connection assembly 2 and the negative pressure mechanism 1 by providing the adapter joint 15. When the connection assembly 2 needs to be installed, the connection assembly 2 can be directly fixed to the second extension portion 153 of the adapter joint 15.

[0080] The flange portion 151 is provided with a notch 151a on the periphery, and the connecting portion 111 has a protrusion 111a extending from the hole wall of the first through hole H1, and the protrusion 111a is inserted into the notch 151a. The present application can prevent the adapter 15 from rotating during the formation process by setting the protrusion 111a and the notch 151a to cooperate.

[0081] Each connecting assembly 2 includes a first connecting tube 21 and a suction nozzle 22. One end of the first connecting tube 21 is connected to the negative pressure mechanism 1, and the other end is connected to the suction nozzle 22. The first connecting tube 21 can be directly connected to the second extension portion 153 of the adapter connector 15, or indirectly connected to the second extension portion 153 of the adapter connector 15 through other components. The suction nozzle 22 can be a double-layer suction nozzle with two layers of sealing rings inside, which has stronger airtightness. During formation, the suction nozzle 22 covers the injection hole of the battery 8 from the outside, and can also be inserted into the injection hole.

[0082] Reference Figure 1 and Fig. 9 The battery formation device further includes a substrate 4, a pressing plate 5, a positioning block 6 and a support plate 7, wherein the positioning block 6 is multiple and is located between the substrate 4 and the pressing plate 5. The substrate 4 can be fixed to an external frame by bolts. The negative pressure mechanism 1 is connected to the substrate 4 by the support plate 7. The pressing plate 5 is located on a side of the substrate 4 away from the negative pressure mechanism 1 and is connected to the substrate 4, and is used to press the positioning block 6 on the substrate 4. The first connecting pipe 21 of each connecting assembly 2 is connected to the positioning block 6.

[0083] When the battery 8 needs to be formed, multiple batteries 8 are placed in a fixture located on the lower side of the pressure plate 5 along the height direction Z; then, an external power device (such as a motor, a cylinder, etc.) drives the multiple batteries 8 to move upward through the fixture; correspondingly, when the injection hole of the battery 8 contacts and is covered by the suction nozzle 22, the power device stops working, and then the battery is formed. After the formation is completed and the electrolyte in the sub-chamber S1 flows back to the battery 8, the power device drives the battery 8 to move downward so that the suction nozzle 22 is separated from the battery 8.

[0084] Reference Fig. 9 and Fig.10 The positioning block 6 has a main body 61 and a protrusion 62. The main body 61 is disposed between the substrate 4 and the pressing plate 5. The protrusion 62 extends from the main body 61 away from the surface of the pressing plate 5. Fig.11 The substrate 4 is provided with a plurality of positioning holes 41 , and the protrusion 62 of each positioning block 6 is inserted into the positioning hole 41 .

[0085] The pressing plate 5 and the base plate 4 can be connected by bolts. By rotating the bolts, the distance between the pressing plate 5 and the base plate 4 in the height direction Z can be adjusted. When the positioning block 6 needs to be installed, the bolts are loosened to increase the distance between the pressing plate 5 and the base plate 4, and then a plurality of positioning blocks 6 are placed on the pressing plate 5, and the protrusions 62 of the positioning blocks 6 are opposite to the positioning holes 41 of the base plate 4. Finally, the distance between the pressing plate 5 and the base plate 4 is reduced by tightening the bolts, so that the protrusions 62 are inserted into the positioning holes 41 and the main body 61 is clamped between the pressing plate 5 and the base plate 4.

[0086] The present application fixes a plurality of positioning blocks 6 by cooperating with the base plate 4 and the pressure plate 5. When the positioning blocks 6 are disassembled and assembled, it is only necessary to rotate the bolts between the pressure plate 5 and the base plate 4, and it is not necessary to set fasteners for each positioning block 6. Therefore, the positioning blocks 6 of the present application are easy to disassemble and assemble, effectively simplifying the production process and improving efficiency.

[0087] The main body 61 is provided with a fourth through hole H4, and the first connecting pipe 21 passes through the fourth through hole H4 and is connected to the main body 61. The positioning block 6 is used to fix the first connecting pipe 21.

[0088] Each positioning block 6 has a plurality of protrusions 62, and the plurality of protrusions 62 can prevent the main body 61 from rotating. Preferably, each positioning block 6 has two protrusions 62.

[0089] Preferably, the number of the positioning holes 41 is greater than the total number of the protrusions 62 of the plurality of positioning blocks 6. Fig.11 The substrate 4 may be provided with two rows of positioning holes 41 , and the two protrusions 62 of the positioning block 6 are respectively inserted into the two rows of positioning holes 41 .

[0090] In the production process of batteries, it is usually necessary to form batteries 8 of different specifications. When the specifications of the battery 8 change, the position of the injection hole will also change accordingly. Therefore, in order to adapt to the change of the battery 8, the position of the positioning block 6 also needs to be changed accordingly. The present application sets a plurality of positioning holes 41 on the substrate 4, corresponding to batteries 8 of different specifications; when the specifications of the battery 8 change, the positioning block 6 is moved to the positioning hole 41 corresponding to the battery 8 of the new specification. Therefore, the battery formation device of the present application has good versatility.

[0091] Reference Fig. 9The suction nozzle 22 is sleeved on one end of the first connecting tube 21, and the first connecting tube 21 can be inserted into the stepped through hole inside the suction nozzle 22 and fixed to the suction nozzle 22 by interference fit. The outer diameter of the other end of the first connecting tube 21 away from the suction nozzle 22 is greater than the diameter of the fourth through hole H4, so the other end of the first connecting tube 21 can abut against the main body 61. The first connecting tube 21 can slide along the fourth through hole H4.

[0092] The connecting assembly 2 further includes a spring 23 , which is sleeved on the first connecting tube 21 and located between the suction nozzle 22 and the main body 61 .

[0093] When the battery 8 needs to be formed, the battery 8 moves upward, and when the suction nozzle 22 contacts the battery 8, the battery 8 continues to move upward for a distance, driving the suction nozzle 22 to move upward; and the positioning block 6 presses the spring 23 from the upper side and provides the support force of the spring 23, the spring 23 is compressed, and at the same time, the elastic force of the spring 23 presses the suction nozzle 22 tightly against the battery 8, ensuring the sealing performance between the suction nozzle 22 and the battery 8. At the same time, the spring 23 can play a buffering role to prevent the suction nozzle 22 from crushing the battery 8.

[0094] The first connecting tube 21 is a metal tube, such as a stainless steel tube. The metal tube has high strength and can avoid bending during the up and down movement, ensuring that the suction nozzle 22 and the injection hole of the battery 8 are opposite to each other up and down.

[0095] In the present application, the position of the adapter 15 is fixed; when the specifications of the battery 8 change, the position of the positioning block 6 also needs to be changed accordingly. The first connecting tube 21 is a metal tube. If the first connecting tube 21 is directly connected to the adapter 15, then when the positioning block 6 is moved, the first connecting tube 21 cannot be bent and it is difficult to adapt to the change of the specifications of the battery 8.

[0096] Therefore, preferably, the connection assembly 2 further includes a second connection tube 24, which connects the first connection tube 21 and the negative pressure mechanism 1, and the second connection tube 24 is a flexible tube. The two ends of the second connection tube 24 are respectively connected to the second extension portion 153 of the adapter joint 15 and the first connection tube 21 through joint nuts. The flexible tube can have a large length and is easy to bend, so when the specifications of the battery 8 change, the positioning block 6 and the first connection tube 21 can move freely. The material of the second connection tube 24 can be Teflon.

[0097] The suction nozzle 22 is located on the side of the pressing plate 5 away from the substrate 4. The pressing plate 5 is provided with a strip-shaped fifth through hole H5, and the substrate 4 is provided with a strip-shaped sixth through hole H6, and the fifth through hole H5 and the sixth through hole H6 are respectively located on both sides of the fourth through hole H4. The substrate 4, the pressing plate 5 and the suction nozzle 22 are arranged along the height direction Z, and the fifth through hole H5 and the sixth through hole H6 are respectively located on both sides of the fourth through hole H4 along the height direction Z.

[0098] The first connecting tubes 21 of the plurality of connecting assemblies 2 can pass through the fifth through hole H5. By providing the fifth through hole H5, it is possible to prevent the pressing plate 5 from interfering with the first connecting tubes 21. Since the fifth through hole H5 has a relatively large length, when the position of the positioning block 6 changes, the first connecting tubes 21 can slide freely in the fifth through hole H5.

[0099] The sixth through hole H6 exposes the end of the first connecting tube 21 away from the suction nozzle 22. The sixth through hole H6 facilitates the connection between the second connecting tube 24 and the first connecting tube 21. Since the sixth through hole H6 has a large length, when the position of the positioning block 6 changes, the end of the first connecting tube 21 away from the suction nozzle 22 can slide freely in the sixth through hole H6.

[0100] Reference Fig.11 The substrate 4 has a groove 42, and the groove 42 is recessed relative to the surface of the substrate 4 close to the pressing plate 5. The main body 61 of the positioning block 6 is at least partially accommodated in the groove 42. The sixth through hole H6 and the positioning hole 41 are formed on the bottom wall of the groove 42 away from the pressing plate 5. By providing the groove 42, space can be saved in the height direction Z; at the same time, the pressing plate 5 can be attached to the surface of the substrate 4, which is convenient for the installation and positioning of the pressing plate 5.

Claims

1. A battery formation device, characterized in that: It comprises a negative pressure mechanism (1), a connecting component (2) and an air extraction connector (3); The negative pressure mechanism (1) has a containing chamber (S) inside; The air extraction joint (3) is arranged on the negative pressure mechanism (1) and is in communication with the accommodating chamber (S); There are a plurality of connection components (2) disposed on the negative pressure mechanism (1), and each connection component (2) is communicated with the accommodating chamber (S) and is used to be connected to the battery; The negative pressure mechanism (1) comprises a negative pressure cup body (11) and a cover plate (12); a receiving chamber (S) is formed in the negative pressure cup body (11); the cover plate (12) is connected to the negative pressure cup body (11) and seals the receiving chamber (S); an air extraction joint (3) is connected to the cover plate (12); and a connecting assembly (2) is connected to the negative pressure cup body (11); The accommodating chamber (S) comprises a sub-chamber (S1) and a confluence chamber (S2); the sub-chambers (S1) are multiple and separated from each other; the confluence chamber (S2) is located on a side of the multiple sub-chambers (S1) close to the cover plate (12), and the confluence chamber (S2) is connected to the multiple sub-chambers (S1); the exhaust joint (3) is connected to the confluence chamber (S2); each connecting component (2) is connected to a corresponding sub-chamber (S1), and the number of the sub-chambers (S1) is equal to or greater than the number of the connecting components (2).

2. The battery formation device according to claim 1, characterized in that: The negative pressure mechanism (1) further comprises a partition (13), wherein the partition (13) is accommodated in the confluence chamber (S2); Each sub-chamber (S1) has an opening connected to the confluence chamber (S2), and the partition plate (13) only covers a part of the opening of each sub-chamber (S1).

3. The battery formation device according to claim 2, characterized in that: The negative pressure mechanism (1) further comprises a limiting component (14), wherein the limiting component (14) is connected to the partition plate (13) and is arranged between the partition plate (13) and the cover plate (12).

4. The battery formation device according to claim 1, characterized in that: One end of the negative pressure cup body (11) away from the cover plate (12) has a plurality of protruding connection parts (111), and the number of the connection parts (111) is the same as the number of the sub-chambers (S1); Each connecting portion (111) is located on a side of a corresponding sub-chamber (S1) away from the cover plate (12) and has a first through hole (H1) communicating with the sub-chamber (S1); The negative pressure mechanism (1) further comprises an adapter joint (15) and a fixing member (16); the adapter joint (15) comprises a flange portion (151), a first extension portion (152) and a second extension portion (153); the first extension portion (152) extends from a side of the flange portion (151) close to the connecting portion (111); and the second extension portion (153) extends from a side of the flange portion (151) away from the connecting portion (111); The fixing member (16) is received in the first through hole (H1) and has a second through hole (H2), and the second through hole (H2) is communicated with the sub-chamber (S1); The flange portion (151) is inserted into the first through hole (H1), and the first extension portion (152) is inserted into the second through hole (H2) and is threadedly connected to the fixing member (16); The adapter joint (15) has a third through hole (H3) that passes through the first extension portion (152), the flange portion (151) and the second extension portion (153); the third through hole (H3) is in communication with the second through hole (H2).

5. The battery formation device according to claim 4, characterized in that: The flange part (151) is provided with a notch (151a) on the periphery, and the connecting part (111) has a protrusion (111a) extending from the hole wall of the first through hole (H1), and the protrusion (111a) is inserted into the notch (151a).

6. The battery formation device according to any one of claims 1 to 5, characterized in that: Each connecting assembly (2) comprises a first connecting tube (21) and a suction nozzle (22); one end of the first connecting tube (21) is connected to the negative pressure mechanism (1), and the other end is connected to the suction nozzle (22).

7. The battery formation device according to claim 6, characterized in that: The battery formation device further comprises a substrate (4), a pressing plate (5) and a positioning block (6); the positioning blocks (6) are multiple and are located between the substrate (4) and the pressing plate (5); The negative pressure mechanism (1) is connected to the base plate (4); the pressure plate (5) is located on a side of the base plate (4) away from the negative pressure mechanism (1) and is connected to the base plate (4); The first connecting pipe (21) of each connecting assembly (2) is connected to the positioning block (6).

8. The battery formation device according to claim 7, characterized in that: The positioning block (6) comprises a main body (61) and a protrusion (62), wherein the main body (61) is arranged between the base plate (4) and the pressing plate (5), and the protrusion (62) extends from the main body (61) away from the surface of the pressing plate (5); The base plate (4) is provided with a plurality of positioning holes (41), and the protrusions (62) of each positioning block (6) are inserted into the positioning holes (41); The main body (61) is provided with a fourth through hole (H4), and the first connecting pipe (21) passes through the fourth through hole (H4) and is connected to the main body (61).

9. The battery formation device according to claim 8, characterized in that: The suction nozzle (22) is sleeved on one end of the first connecting tube (21), and the outer diameter of the other end of the first connecting tube (21) away from the suction nozzle (22) is greater than the diameter of the fourth through hole (H4); The connecting assembly (2) further comprises a spring (23), which is sleeved on the first connecting tube (21) and located between the suction nozzle (22) and the main body (61).

10. The battery formation device according to claim 9, characterized in that: The first connecting pipe (21) is a metal pipe; The connection assembly (2) further comprises a second connection tube (24), the second connection tube (24) connecting the first connection tube (21) and the negative pressure mechanism (1), and the second connection tube (24) is a flexible tube.

11. The battery formation device according to claim 8, characterized in that: The suction nozzle (22) is located on a side of the pressing plate (5) away from the base plate (4); The pressing plate (5) is provided with a strip-shaped fifth through hole (H5), and the base plate (4) is provided with a strip-shaped sixth through hole (H6), and the fifth through hole (H5) and the sixth through hole (H6) are respectively located on both sides of the fourth through hole (H4); The first connecting tubes (21) of the plurality of connecting assemblies (2) pass through the fifth through hole (H5), and the sixth through hole (H6) exposes an end of the first connecting tube (21) away from the suction nozzle (22).

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