Liquid injection tool
By designing the opening and closing movement control channel port of the liquid injection fixture, the problem of electrolyte spraying out during the lithium battery liquid injection process was solved, ensuring battery performance and safety.
Patent Information
- Application Number
- CN202423320713.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2034-12-30
AI Technical Summary
During the lithium battery electrolyte filling process, the spraying phenomenon causes electrolyte to contaminate the battery casing and terminals, affecting battery performance and safety, and posing a safety hazard.
Design a liquid injection fixture, comprising a main body and an opening and closing component, which enables the connection and isolation of the channel port by the movement of the opening and closing component, thereby blocking the electrolyte from being ejected.
It effectively prevents electrolyte leakage, protects battery performance and appearance, and ensures safety and reliability.
Smart Images
Figure CN223757661U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a battery field especially relates to a kind of liquid injection tool. BACKGROUND
[0002] Electrolyte is one of the important components of lithium battery, which mainly plays the role of conducting ions between the positive and negative electrodes of the battery, and is the guarantee for lithium battery to obtain high voltage, high specific energy and other advantages. Taking a certain lithium battery as an example, during its production process, electrolyte needs to be injected into the battery through a liquid injection device.
[0003] When the liquid injection is completed and the liquid injection device is removed from the liquid injection hole of the battery, due to excessive liquid injection amount, excessive compaction of the battery cell, slow electrolyte infiltration, or due to excessive pressure difference between the inside and outside of the battery shell, etc., liquid injection phenomenon is easy to occur, and electrolyte is ejected from the liquid injection hole to the outside.
[0004] The ejected electrolyte may pollute the battery shell, the pole, etc., causing oxidation and corrosion, affecting the performance of the battery, causing appearance defects of the battery, and even causing safety problems. SUMMARY
[0005] The liquid injection tool provided by the embodiment of the utility model at least solves the problem that liquid injection phenomenon is easy to occur when the battery is injected, which affects the performance and appearance of the battery and poses a safety hazard. By setting the main body and the opening and closing member, the ejected electrolyte is effectively blocked, the good performance and appearance of the battery are ensured, and the safety is reliable.
[0006] The utility model provides a kind of liquid injection tool, including main body, be configured as being placed in the end cover of battery monomer, the main body has oppositely arranged first tooling surface and second tooling surface along first direction;The main body is provided with the passage passing through the main body, and the first port of the passage is formed in the first tooling surface, and the second port of the passage is formed in the second tooling surface;Formed with containing cavity in the main body, the containing cavity and the passage are communicated;Wherein, the first direction is configured as the thickness direction of the end cover;Opening and closing member is set in the containing cavity, and the opening and closing member is relative to the containing cavity can be moved along the direction close to or away from the passage, to cut off or communicate the first port and the second port.
[0007] In an embodiment of the utility model, the opening and closing member and the containing cavity are slidingly fitted along a second direction;Wherein, the second direction is configured to intersect with the thickness direction of the end cover.
[0008] In an embodiment of the utility model, a first guide portion is provided on the cavity wall of the main body, the first guide portion extends along the second direction, the opening and closing member is provided with a second guide portion corresponding to the first guide portion, and the second guide portion is slidingly connected with the first guide portion.
[0009] In one embodiment of the utility model, the accommodating cavity is internally provided with a rotating part, the rotating part is connected with the main body, the opening and closing part is sleeved on the rotating part, and the opening and closing part and the rotating part are rotationally matched in the first direction.
[0010] In one embodiment of the utility model, the opening and closing part is provided with two opening and closing parts, the two opening and closing parts are oppositely arranged, and the two opening and closing parts can be close to or away from each other.
[0011] In one embodiment of the utility model, the elastic part is accommodated in the accommodating cavity, one end of the elastic part is connected with the main body, and the other end of the elastic part is connected with the opening and closing part.
[0012] In one embodiment of the utility model, the opening and closing part has oppositely arranged first and second side faces, the first side face is arranged towards the elastic part, a force-splitting inclined surface is arranged between the second side face and the side of the opening and closing part facing the second port, the force-splitting inclined surface has a first end and a second end along the inclined direction thereof, the first end of the force-splitting inclined surface is closer to the second port than the second end, and the first end of the force-splitting inclined surface is closer to the first side face than the second end.
[0013] In one embodiment of the utility model, the included angle between the force-splitting inclined surface and the side of the opening and closing part facing the second port is α, and 30°≤α≤60°.
[0014] In one embodiment of the utility model, the opening and closing part has oppositely arranged third and fourth side faces along the first direction, the third side face is closer to the first port than the fourth side face, the distance between the third side face and the first tool face is H1, and 1 / 12H≤H1≤1 / 3H; or / and, the distance between the fourth side face and the second tool face is H2, and 1 / 12H≤H2≤1 / 3H; wherein H is the dimension of the main body along the first direction.
[0015] In one embodiment of the utility model, the first tool face is provided with a first positioning part configured to be in concave-convex cooperation with the pole column of the battery monomer; or / and the first tool face is provided with a second positioning part configured to be in concave-convex cooperation with the end cover.
[0016] The above technical scheme of the utility model has the following beneficial effects compared with the prior art:
[0017] The liquid injection tool, through the setting of the main body and the opening and closing piece, when liquid injection is carried out, the opening and closing piece moves relative to the containing cavity of the main body, and the two ports of the channel are communicated, so that the liquid injection device carries out liquid injection; after the liquid injection is completed, the opening and closing piece moves relative to the containing cavity of the main body, and the two ports of the channel are cut off, so as to block the electrolyte from being sprayed out of the injection hole. Therefore, the electrolyte can be effectively prevented from being sprayed out, and the problems of electrolyte pollution of the battery shell and electrolyte splashing injury are avoided, the good performance and appearance of the battery are ensured, and safety and reliability are ensured. BRIEF DESCRIPTION OF DRAWINGS
[0018] The drawings described herein are used to provide further understanding of the utility model, and constitute a part of the utility model. The illustrative embodiments of the utility model and the description thereof are used to explain the utility model, and do not constitute improper limitation on the utility model. In the drawings:
[0019] Figure 1 It is one of the partial cross-sectional structure schematic views of the liquid injection tool in the preferred embodiments of the utility model.
[0020] Figure 2 It is the second partial cross-sectional structure schematic view of the liquid injection tool in the preferred embodiments of the utility model.
[0021] Figure 3 It is the third partial cross-sectional structure schematic view of the liquid injection tool in the preferred embodiments of the utility model.
[0022] Figure 4 It is the fourth partial cross-sectional structure schematic view of the liquid injection tool in the preferred embodiments of the utility model.
[0023] Figure 5 It is the size schematic view of the liquid injection tool in the preferred embodiments of the utility model.
[0024] Figure 6 It is the structure schematic view of the force component inclined surface in the preferred embodiments of the utility model.
[0025] Figure 7 It is one of the cross-sectional structure schematic views of the liquid injection tool in the preferred embodiments of the utility model.
[0026] Figure 8 It is the second cross-sectional structure schematic view of the liquid injection tool in the preferred embodiments of the utility model.
[0027] Figure 9 It is the third cross-sectional structure schematic view of the liquid injection tool in the preferred embodiments of the utility model.
[0028] Figure 10 It is the fourth cross-sectional structure schematic view of the liquid injection tool in the preferred embodiments of the utility model.
[0029] In the above drawings, D1 represents a first direction, D2 represents a second direction, 10 represents a main body, 11 represents a first tool face, 111 represents a first positioning portion, 112 represents a second positioning portion, 12 represents a second tool face, 13 represents a channel, 131 represents a first port, 132 represents a second port, 14 represents a receiving cavity, 141 represents a first guide portion, 142 represents a rotating portion, 20 represents a battery cell, 21 represents an end cover, 22 represents a pole, 23 represents a liquid injection hole, 30 represents an opening and closing member, 301 represents a second guide portion, 302 represents a force component inclined surface, 3021 represents a first end, 3022 represents a second end, 31 represents a first side face, 32 represents a second side face, 33 represents a third side face, 34 represents a fourth side face, 40 represents an elastic member, and 50 represents a liquid injection tube. DETAILED DESCRIPTION
[0030] It should be noted that the embodiments and the features in the embodiments in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.
[0031] It should be noted that the terms used herein are only intended to describe specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form, unless the context clearly indicates otherwise, and it should also be understood that the terms "comprise" and / or "include" as used in the specification indicate the presence of features, steps, operations, devices, components and / or combinations thereof.
[0032] The relative arrangement, numerical expressions and values of the components and steps set forth in these embodiments do not limit the scope of the present application unless otherwise specifically stated. At the same time, it should be understood that the sizes of the various parts shown in the drawings are not drawn in proportion to the actual proportions. The techniques, methods and devices known to those skilled in the relevant art can not be discussed in detail, but under appropriate circumstances, the techniques, methods and devices should be considered as part of the authorized specification. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.
[0033] In the production process of the battery cell 20, it is necessary to inject electrolyte into the battery cell 20 through a liquid injection device. Taking a certain liquid injection device and a battery cell 20 as an example, the liquid injection device comprises a liquid injection tube 50, and the end cover 21 of the battery cell 20 is provided with a liquid injection hole 23. When injecting liquid, the liquid injection tube 50 is inserted into the inside of the battery cell 20 from the liquid injection hole 23 to inject electrolyte.
[0034] When the injection is completed, the injection pipe 50 is removed from the injection hole 23, and the electrolyte is infiltrated slowly due to excessive injection amount, excessive compaction of the battery cell, or excessive pressure difference between the inside and outside of the battery shell, etc., and the electrolyte is easily sprayed out of the injection hole 23, i.e., the injection hole 23 sprays the electrolyte out of the battery cell 20. The sprayed electrolyte may pollute the battery shell, the pole 22, etc., and cause oxidation and corrosion, affect the performance of the battery cell 20, cause appearance defects of the battery cell 20, or even cause safety problems.
[0035] To solve the above problems, referring to Figure 1 The utility model provides a kind of injection tool, including main body 10 and open-close piece 30, avoid spraying by cooperation of main body 10 and open-close piece 30.
[0036] Main body 10 has oppositely arranged first tool face 11 and second tool face 12 along first direction D1. Main body 10 is provided with channel 13 passing through main body 10, and the first port 131 of channel 13 is formed in first tool face 11, and the second port 132 of channel 13 is formed in second tool face 12.
[0037] The skilled person can set the main body 10 of different shapes according to the actual shape of the battery cell 20. For example, when injecting the cylindrical battery cell 20, the main body 10 is also set to a cylindrical structure; when injecting the cuboid battery cell 20, the main body 10 is also set to a cuboid structure.
[0038] In use, the main body 10 is configured to be arranged on the end cover 21 of the battery cell 20, and the first direction D1 is configured as the thickness direction of the end cover 21. Taking the first tool face 11 as an example, the channel 13 is aligned with the injection hole 23 to facilitate operation. Preferably, the first tool face 11 and the second tool face 12 are both set to a plane to facilitate cooperation with the cover surface of the end cover 21. In the case where the first tool face 11 is in contact with the cover surface of the end cover 21, the first port 131 is the port relatively close to the injection hole 23, and the second port 132 is the port relatively away from the injection hole 23.
[0039] The skilled person can set the shape of the channel 13 and the port according to actual needs. Preferably, the shapes of the first port 131 and the second port 132 are set to be the same as the shape of the injection hole 23. For example, in the case where the shape of the injection hole 23 is circular, the first port 131 and the second port 132 are both set to be circular. In the case where the shapes of the injection hole 23 and the two ports are the same, the skilled person can set the sizes of the two ports according to actual needs. For example, the sizes of the first port 131 and the second port 132 are both set to be equal to the size of the injection hole 23.
[0040] The main body 10 is formed with a receiving cavity 14, which is in communication with the channel 13. The receiving cavity 14 can be understood as being formed by removing part of the material of the main body 10. For example, the main body 10 is provided as an integral structure, and the receiving cavity 14 is formed by removing part of the material of the main body 10 on the wall of the channel 13. Alternatively, the main body 10 is provided as a split structure, and only one of the split structures is provided with a recessed cavity, or both of the split structures are provided with recessed cavities, and the two split structures are combined so that the cavities on the split structures enclose the receiving cavity 14. The shape, size and number of the receiving cavity 14 can be set according to actual needs by those skilled in the art, and will not be described in detail.
[0041] The opening and closing member 30 is a component for realizing the communication or isolation of the first port 131 and the second port 132 of the channel 13. The opening and closing member 30 is arranged in the receiving cavity 14, and the opening and closing member 30 can move relative to the receiving cavity 14 in the direction of approaching or moving away from the channel 13 to isolate or communicate the first port 131 and the second port 132. Those skilled in the art can set the specific movement mode and driving mode of the opening and closing member 30 according to actual needs.
[0042] When the first port 131 and the second port 132 are in communication, the liquid injection device, such as the liquid injection pipe 50, can extend into the channel 13 to perform liquid injection. When the first port 131 and the second port 132 are isolated, the electrolyte cannot flow through the opening and closing member 30 and flow to the second port 132 of the channel 13.
[0043] For example, when liquid injection is needed, the liquid injection tool is arranged on the end cover 21 of the battery monomer 20, the first tool surface 11 of the main body 10 is attached to the cover surface of the end cover 21, and the first port 131 of the channel 13 is aligned with the liquid injection hole 23. After the arrangement is completed, the opening and closing member 30 is controlled to move relative to the receiving cavity 14 so that the first port 131 and the second port 132 are in communication. Then, the liquid injection device is used for liquid injection. For example, the liquid injection pipe 50 is inserted into the channel 13 and electrolyte is injected. After the liquid injection is completed, the liquid injection pipe 50 is removed, and the opening and closing member 30 moves relative to the receiving cavity 14 so that the first port 131 and the second port 132 are isolated. If the battery monomer 20 sprays liquid at this time, the sprayed electrolyte will be blocked by the opening and closing member 30 and cannot flow through the opening and closing member 30 and flow to the second port 132 of the channel 13. Therefore, the electrolyte can be effectively prevented from being sprayed, and the problems of electrolyte polluting the battery shell and electrolyte splashing to hurt people can be avoided, so that the performance and appearance of the battery are ensured, and safety and reliability are ensured.
[0044] The liquid injection tool, through the setting of the main body 10 and the opening and closing piece 30, when liquid injection is carried out, the opening and closing piece 30 moves relative to the containing cavity 14 of the main body 10, and the two ports of the channel 13 are communicated, so that the liquid injection device carries out liquid injection; after the liquid injection is completed, the opening and closing piece 30 moves relative to the containing cavity 14 of the main body 10, and the two ports of the channel 13 are cut off, so as to block the electrolyte from being sprayed out of the injection hole 23. Therefore, the electrolyte can be effectively prevented from being sprayed out, and the problems of electrolyte polluting the battery shell and electrolyte splashing to hurt people are avoided, and the good performance and appearance of the battery are ensured, and safety and reliability are ensured.
[0045] The person skilled in the art can set the material of the opening and closing piece 30 and the main body 10 according to actual needs; preferably, both are made of corrosion-resistant material to prolong the service life of the tool.
[0046] In some embodiments of the liquid injection tool, the opening and closing piece 30 and the containing cavity 14 are slidingly fitted along the second direction D2. The second direction D2 is configured to intersect the thickness direction of the end cover 21; preferably, the second direction D2 is perpendicular to the first direction D1. The person skilled in the art can set the specific sliding fitting mode according to actual needs, for example, the opening and closing piece 30 is set to be able to move linearly along the containing cavity 14, or the opening and closing piece 30 is set to be able to rotate relative to the containing cavity 14, so as to realize the communication or cutting off of the first port 131 and the second port 132 of the channel 13. During the sliding of the opening and closing piece 30, the opening and closing piece 30 is at least partially left in the containing cavity 14, so as to avoid problems such as inclination and falling off of the opening and closing piece 30.
[0047] Taking linear movement as an example, referring to Figure 1 and Figure 2 In some embodiments of the liquid injection tool, the cavity wall of the main body 10 is provided with a first guide portion 141, and the first guide portion 141 extends along the second direction D2. The opening and closing piece 30 is provided with a second guide portion 301 corresponding to the first guide portion 141, and the second guide portion 301 is slidingly connected with the first guide portion 141.
[0048] The person skilled in the art can set the first guide portion 141 and the second guide portion 301 according to actual needs, for example, one of them is set to be a sliding block, and the other is set to be a sliding groove, so as to realize sliding connection.
[0049] Preferably, the first guide portion 141 is arranged as a guide groove extending along the second direction D2, and the second guide portion 301 is arranged as a guide protrusion arranged in the guide groove and capable of sliding along the second direction D2. By arranging the structure, on one hand, the two guide portions can provide guidance for the slide of the opening and closing member 30, so as to facilitate the slide of the opening and closing member 30 and realize the quick connection or quick isolation of the ports. On the other hand, the two guide portions can form a certain limit to avoid the opening and closing member 30 from being separated from the accommodating cavity 14 during the slide, and improve the reliability and safety of the structure.
[0050] In the case that the opening and closing member 30 can move linearly relative to the accommodating cavity 14, the skilled in the art can arrange the number of the opening and closing member 30 according to the actual needs. In some embodiments, only one opening and closing member 30 is arranged to realize the connection or isolation of the first port 131 and the second port 132 of the channel 13. In some embodiments, the opening and closing member 30 is arranged in plurality, and the plurality of opening and closing members 30 cooperate to realize the connection or isolation of the first port 131 and the second port 132 of the channel 13.
[0051] For example, the plurality of opening and closing members 30 are arranged on the same plane and sequentially arranged along the circumference of the channel 13. When the ports need to be connected or isolated, the plurality of opening and closing members 30 move linearly at the same time. Alternatively, the plurality of opening and closing members 30 are arranged on different planes, and when the ports need to be connected or isolated, the plurality of opening and closing members 30 can move linearly at the same time or sequentially.
[0052] Preferably, referring to Figure 1 , the opening and closing member 30 is arranged in two. The two opening and closing members 30 are arranged oppositely. Correspondingly, the accommodating cavity 14 is also arranged in two, and the two opening and closing members 30 are arranged in the corresponding accommodating cavities 14. The cavity wall of each accommodating cavity 14 is provided with a first guide portion 141, and each opening and closing member 30 is provided with a second guide portion 301 corresponding to the first guide portion 141, and the second guide portion 301 is in sliding connection with the first guide portion 141. When the liquid injection is performed, the two opening and closing members 30 move linearly relative to the accommodating cavity 14, so as to relatively approach or move away from the other opening and closing member 30. During the linear movement of the opening and closing member 30, the two guide portions provide guidance and limit for the opening and closing member 30. Under the cooperation of the two opening and closing members 30, the connection or isolation of the first port 131 and the second port 132 is realized. Compared with the case that only one opening and closing member 30 is arranged or more opening and closing members 30 are arranged, the structure is simple, easy to open, and has good sealing effect.
[0053] For example, rotation, referring to Figure 3 and Figure 4As shown, the liquid injection tool in some embodiments, the accommodation cavity 14 is provided with a rotating part 142, the rotating part 142 and the main body 10 are connected. The person skilled in the art can set the rotating part 142 according to the actual demand, and the connecting mode of the rotating part 142 and the main body 10.
[0054] Exemplary, the rotating part 142 is set as a rotating column, the rotating column and the main body 10 can be integrally formed, or the two are set as a split structure. Correspondingly, the opening and closing part 30 is provided with a rotating hole, the rotating hole and the rotating part 142 are gap matched, the opening and closing part 30 is sleeved on the rotating part 142, and the opening and closing part 30 and the rotating part 142 are rotated and matched around the first direction D1. When the opening and closing part 30 rotates relative to the accommodation cavity 14, the rotating part 142 can provide fixed support for the rotation of the opening and closing part 30, prevent the opening and closing part 30 from moving relative to the accommodation cavity 14 except rotating, improve the reliability and safety of the structure.
[0055] In the case that the opening and closing part 30 can rotate relative to the accommodation cavity 14, the person skilled in the art can set the number of opening and closing parts 30 according to the actual demand. In some embodiments, only one opening and closing part 30 is provided to realize the communication or isolation of the first port 131 and the second port 132 of the channel 13. In some embodiments, the opening and closing part 30 is provided with a plurality of, and the plurality of opening and closing parts 30 are matched to realize the communication or isolation of the first port 131 and the second port 132 of the channel 13.
[0056] Exemplary, the plurality of opening and closing parts 30 are arranged on the same plane, and the plurality of opening and closing parts 30 are arranged along the circumference of the channel 13 in sequence. When the port needs to be communicated or isolated, the plurality of opening and closing parts 30 are rotated simultaneously. Or, the plurality of opening and closing parts 30 are arranged on different planes respectively, and when the port needs to be communicated or isolated, the plurality of opening and closing parts 30 can be rotated simultaneously or sequentially.
[0057] Preferably, refer to Figure 3As shown, the accommodating cavity 14 is provided with only one, and the channel 13 is provided in the middle region of the accommodating cavity 14. Two rotating parts 142 are provided in the accommodating cavity 14, and the two rotating parts 142 are oppositely provided on the two sides of the channel 13 in the radial direction, wherein the radial direction of the channel 13 is perpendicular to the first direction D1. The opening and closing member 30 is provided with two, and the two opening and closing members 30 are oppositely provided in the accommodating cavity 14. Each opening and closing member 30 is provided as a strip structure, and a rotating hole is provided at one end of the opening and closing member 30 in the extending direction of the length of the opening and closing member 30, and the opening and closing member 30 is sleeved on the rotating part 142 through the rotating hole. When the liquid injection is carried out, the two opening and closing members 30 are rotated around the first direction D1, so as to relatively approach or move away from the other opening and closing member 30. In the process of rotating the opening and closing member 30, the rotating part 142 provides a fixed support for the rotation of the opening and closing member 30. Under the cooperation of the two opening and closing members 30, the communication or isolation of the first port 131 and the second port 132 is realized. Compared with the case that only one opening and closing member 30 is provided, or a larger number of opening and closing members 30 are provided, the structure is simple, easy to open, and good in sealing effect.
[0058] The liquid injection tool, in some embodiments, comprises an elastic member 40, and the elastic member 40 is accommodated in the accommodating cavity 14. One end of the elastic member 40 is connected with the main body 10, and the other end of the elastic member 40 is connected with the opening and closing member 30. The elastic member 40 is used to provide a driving force required for the movement of the opening and closing member 30, for example, to drive the opening and closing member 30 to move linearly or rotate.
[0059] On the one hand, the elastic member 40 can enable the opening and closing member 30 to keep isolating the first port 131 and the second port 132 of the channel 13 without the action of external force, and the structure is simple and small in size. On the other hand, under the action of the elastic member 40, after the liquid injection and the removal of the liquid injection pipe 50, the opening and closing member 30 can be quickly moved under the elastic force of the elastic member 40 to isolate the first port 131 and the second port 132 of the channel 13, so as to prevent the electrolyte from being sprayed out of the channel 13 and effectively avoid the liquid spraying phenomenon.
[0060] The person skilled in the art can set the specific elastic member 40 according to the actual needs, and preferably, the elastic member 40 is set as a spring. The person skilled in the art can set the connection mode of the elastic member 40 with the main body 10 and the elastic member 40 with the opening and closing member 30 according to the actual needs, for example, abutting or clamping.
[0061] Further, referring to Figure 5 and Figure 6 The liquid injection tool, in some embodiments, the opening and closing member 30 has oppositely arranged first and second side surfaces 31 and 32.
[0062] The first side 31 is preferably provided with a guide structure to facilitate assembly of the opening and closing member 30 and improve assembly efficiency when the main body 10 is provided in an integrated structure. For example, the first side 31 is provided with a rounded or chamfered corner.
[0063] A force-splitting slope 302 is provided between the second side 32 and the side of the opening and closing member 30 facing the second port 132. The force-splitting slope 302 has a first end 3021 and a second end 3022 along the inclined direction thereof. The first end 3021 of the force-splitting slope 302 is closer to the second port 132 than the second end 3022, and the first end 3021 of the force-splitting slope 302 is closer to the first side 31 than the second end 3022. By providing the force-splitting slope 302, the opening and closing member 30 can be driven to move by the force-splitting slope 302, thereby saving space and energy required for providing an additional driver.
[0064] For example, as shown in Figure 8 When the injection pipe 50 moves close to the injection tool and the battery cell 20 along the first direction D1, the injection pipe 50 first contacts the force-splitting slope 302 on the second side 32 of the opening and closing member 30. As shown in Figure 9 and Figure 10 At this time, under the action of the force-splitting slope 302, the power of the injection pipe 50 moving along the first direction D1 is converted into the power of the opening and closing member 30 moving along the second direction D2, so that the opening and closing member 30 can overcome the elastic force of the elastic member 40 and move to make the first port 131 and the second port 132 communicate.
[0065] It should be noted that the force-splitting slope 302 is not only provided in a planar structure. For example, the force-splitting slope 302 can also be provided in a concave structure or a convex structure.
[0066] Preferably, when a plurality of opening and closing members 30 are provided, the force-splitting slopes 302 of the plurality of opening and closing members 30 can cooperate with each other to drive the opening and closing member 30 in cooperation with the injection pipe 50. For example, when two opening and closing members 30 are provided, the two force-splitting slopes 302 combine to form a groove-shaped structure; when three or more opening and closing members 30 are provided, the plurality of force-splitting slopes 302 combine to form a conical or pyramidal structure.
[0067] Further, as shown in Figure 5 and Figure 6 In some embodiments, the injection tool has an angle α between the force-splitting slope 302 and the side of the opening and closing member 30 facing the second port 132, and 30°≤α≤60°.
[0068] Specifically, the included angle a of the force component inclined surface 302 is not too small. If the included angle a is too small, less than 30°, the difficulty of driving the opening and closing piece 30 to move and make the port of the channel 13 communicate is increased. The included angle a of the force component inclined surface 302 is not too large. If the included angle a is too large, greater than 60°, the area ratio of the force component inclined surface 302 on the second side surface 32 is increased, and the area for contact and isolation is reduced, which affects the isolation effect.
[0069] In the case that the included angle a is 30° to 60°, the opening and closing piece 30 can be conveniently driven to move, and has a good isolation effect. A person skilled in the art can set a specific included angle a according to actual needs, for example, the included angle a is set to 30°, 35°, 40°, 45°, 50°, 55°, 60°, etc.
[0070] Referring to Figure 5 In some embodiments, the injection tooling device, the opening and closing piece 30 has a third side surface 33 and a fourth side surface 34 arranged opposite along the first direction D1, and the third side surface 33 is closer to the first port 131 than the fourth side surface 34.
[0071] The distance between the third side surface 33 and the first tooling surface 11 is H1, and 1 / 12H≤H1≤1 / 3H, and H is the size of the main body 10 along the first direction D1.
[0072] Specifically, the distance H1 between the third side surface 33 and the first tooling surface 11 cannot be too short. If the distance H1 is too short, less than 1 / 12H, the structural strength of the main body 10 is relatively low, and it is easy to be damaged. The distance H1 between the third side surface 33 and the first tooling surface 11 cannot be too long. If the distance H1 is too long, greater than 1 / 3H, the channel 13 between the third side surface 33 and the first tooling surface 11 along the first direction D1 is easy to remain electrolyte, increasing the cleaning workload.
[0073] In the case that the distance H1 is 1 / 12H to 1 / 3H, it is not easy to accumulate liquid, and the main body 10 has high structural strength. A person skilled in the art can set a specific distance H1 according to actual needs, for example, the distance H1 is set to 1 / 12H, 1 / 11H, 1 / 10H, 1 / 9H, 1 / 8H, 1 / 7H, 1 / 6H, 1 / 5H, 1 / 4H, 1 / 3H, etc.
[0074] Referring to Figure 5 In some embodiments, the injection tooling device, the distance between the fourth side surface 34 and the second tooling surface 12 is H2, and 1 / 12H≤H2≤1 / 3H.
[0075] Specifically, the distance H2 between the fourth side surface 34 and the second tool surface 12 cannot be too short, if the distance H2 is too short, less than 1 / 12H, the main body 10 has relatively low structural strength and is easy to be damaged. The distance H2 between the fourth side surface 34 and the second tool surface 12 cannot be too long, if the distance H2 is too long, greater than 1 / 3H, it is easy to increase the assembly difficulty.
[0076] In the case of the distance H2 being 1 / 12H to 1 / 3H, the liquid injection pipe 50 can be guided to some extent, the liquid injection pipe 50 can be quickly inserted, and the main body 10 has high structural strength. Those skilled in the art can set the specific distance H2 according to actual needs, for example, the distance H2 is set to 1 / 12H, 1 / 11H, 1 / 10H, 1 / 9H, 1 / 8H, 1 / 7H, 1 / 6H, 1 / 5H, 1 / 4H, 1 / 3H, etc.
[0077] Referring to Figure 7 In some embodiments, the first tool surface 11 is provided with a first positioning part 111, and the first positioning part 111 is configured to be matched with the pole column 22 of the battery monomer 20. By setting the first positioning part 111, the positioning can be quickly realized, so as to align the channel 13 and the liquid injection hole 23, and the liquid injection efficiency is improved. In addition, the stability during liquid injection is also improved.
[0078] Those skilled in the art can set the shape of the first positioning part 111 according to actual needs. For example, when facing the cylindrical pole column 22, the first positioning part 111 is set to be a cylindrical groove; when facing the cuboid pole column 22, the first positioning part 111 is set to be a cuboid groove.
[0079] Referring to Figure 7 In some embodiments, the first tool surface 11 is provided with a second positioning part 112, and the second positioning part 112 is configured to be matched with the end cover 21. By setting the second positioning part 112, the positioning can be quickly realized, so as to align the channel 13 and the liquid injection hole 23, and the liquid injection efficiency is improved. In addition, the stability during liquid injection is also improved.
[0080] Those skilled in the art can set the shape of the second positioning part 112 according to actual needs. For example, when facing the cylindrical battery, the second positioning part 112 is set to be a cylindrical groove; when facing the cuboid battery, the second positioning part 112 is set to be a cuboid groove.
[0081] Preferably, the first positioning part 111 and the second positioning part 112 are simultaneously arranged on the first tool surface 11 to achieve the best effect.
[0082] Working principle
[0083] First, referring to Figure 8 The main body 10 of the liquid injection tool is arranged on the end cover 21 of the battery cell 20, the first positioning part 111 is engaged with the pole 22 of the battery cell 20, and the second positioning part 112 is engaged with the end cover 21, so as to align the channel 13 of the main body 10 with the liquid injection hole 23 of the battery cell 20. At this time, under the action of the elastic member 40, the opening and closing member 30 separates the first port 131 and the second port 132 of the channel 13.
[0084] Subsequently, referring to Figure 9 The liquid injection pipe 50 is driven to move in the first direction D1, so that the liquid injection pipe 50 extends into the channel 13 from the second port 132. During the movement of the liquid injection pipe 50, the liquid injection pipe 50 will contact the component force inclined surface 302 of the opening and closing member 30. Under the action of the component force inclined surface 302, the power of the movement of the liquid injection pipe 50 in the first direction D1 is converted into the power of the movement of the opening and closing member 30 in the second direction D2, so that the opening and closing member 30 can overcome the elastic force of the elastic member 40 and move, so as to make the first port 131 and the second port 132 communicate.
[0085] Referring to Figure 10 When the liquid injection pipe 50 extends to a certain size, the liquid injection can be performed. After the liquid injection is completed, the liquid injection pipe 50 is removed from the liquid injection hole 23. After the liquid injection pipe 50 is removed, under the action of the elastic member 40, the opening and closing member 30 moves relative to the accommodating cavity 14 and separates the first port 131 and the second port 132. Assuming that the liquid injection phenomenon occurs at this time, the sprayed electrolyte will be blocked by the opening and closing member 30 and cannot flow through the opening and closing member 30 and flow to the second port 132 of the channel 13. Therefore, the electrolyte spraying can be effectively avoided, and the problems of electrolyte pollution of the battery shell and electrolyte splashing injury can be avoided, so as to ensure the good performance and appearance of the battery and safety and reliability.
[0086] For the convenience of description, spatial relative terms such as "above", "upper", "on", "upper surface", "upper", etc. can be used herein to describe the spatial positional relationship of one device or feature with other devices or features as shown in the drawings. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation of the device described in the drawings. For example, if the device in the drawing is inverted, the device described as "above" or "above" other devices or structures will be positioned "below" or "below" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative description used herein is interpreted accordingly.
[0087] In addition, it needs to be explained that the use of "first", "second" and the like to limit the parts is only for the convenience of distinguishing the corresponding parts, and the above words have no special meaning if there is no further declaration, and therefore cannot be understood as limiting the protection scope of the utility model.
[0088] The above is only the preferred embodiment of the utility model, and is not used to limit the utility model. For those skilled in the art, the utility model can have various changes and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the utility model should be included in the protection scope of the utility model.
Claims
1. A liquid injection tool, characterized by, The injection tooling device comprises: a main body (10) configured to be placed on an end cover (21) of a battery cell (20), the main body (10) having a first tooling face (11) and a second tooling face (12) oppositely arranged along a first direction (D1); the main body (10) is provided with a channel (13) extending through the main body (10), a first port (131) of the channel (13) being formed on the first tooling face (11), and a second port (132) of the channel (13) being formed on the second tooling face (12); the main body (10) is formed with a receiving cavity (14) therein, the receiving cavity (14) being in communication with the channel (13); wherein the first direction (D1) is configured as the thickness direction of the end cover (21); an opening and closing member (30) arranged in the receiving cavity (14), the opening and closing member (30) being movable relative to the receiving cavity (14) along a direction approaching or away from the channel (13) to block or communicate the first port (131) and the second port (132).
2. The injection tooling device according to claim 1, wherein: the opening and closing member (30) and the receiving cavity (14) are slidingly fitted along a second direction (D2); wherein the second direction (D2) is configured to intersect the thickness direction of the end cover (21).
3. The injection tooling device according to claim 2, wherein: a first guide portion (141) is arranged on the cavity wall of the main body (10), the first guide portion (141) extending along the second direction (D2), the opening and closing member (30) is provided with a second guide portion (301) corresponding to the first guide portion (141), and the second guide portion (301) is slidingly connected with the first guide portion (141).
4. The injection tooling device according to claim 2, wherein: a rotating portion (142) is arranged in the receiving cavity (14), the rotating portion (142) being connected with the main body (10); the opening and closing member (30) is sleeved on the rotating portion (142), and the opening and closing member (30) and the rotating portion (142) are rotationally fitted about the first direction (D1).
5. The injection tooling device according to any one of claims 1 to 4, wherein: two opening and closing members (30) are arranged, the two opening and closing members (30) being oppositely arranged and capable of approaching or away from each other.
6. The liquid injection tooling apparatus of any one of claims 1 to 4, wherein, Further comprising: a resilient member (40) accommodated in the receiving cavity (14); one end of the resilient member (40) is connected with the main body (10), and the other end of the resilient member (40) is connected with the opening and closing member (30).
7. The injection tooling device according to claim 6, wherein: The opening and closing member (30) has oppositely arranged first and second side surfaces (31, 32), the first side surface (31) is arranged towards the elastic member (40), and a force-splitting inclined surface (302) is arranged between the second side surface (32) and a side of the opening and closing member (30) facing the second port (132), the force-splitting inclined surface (302) has a first end (3021) and a second end (3022) along its inclined direction, the first end (3021) of the force-splitting inclined surface (302) is closer to the second port (132) than the second end (3022), and the first end (3021) of the force-splitting inclined surface (302) is closer to the first side surface (31) than the second end (3022).
8. The liquid injection tool according to claim 7, characterized in that: The included angle between the force-splitting inclined surface (302) and the side of the opening and closing member (30) facing the second port (132) is α, 30°≤α≤60°.
9. The liquid injection tool according to claim 1, characterized in that: The opening and closing member (30) has oppositely arranged third and fourth side surfaces (33, 34) along the first direction (D1), the third side surface (33) is closer to the first port (131) than the fourth side surface (34), the distance between the third side surface (33) and the first tool surface (11) is H1, 1 / 12H≤H1≤1 / 3H; Or / and, the distance between the fourth side surface (34) and the second tool surface (12) is H2, 1 / 12H≤H2≤1 / 3H; Wherein, H is the size of the main body (10) along the first direction (D1).
10. The liquid injection tool according to claim 1, characterized in that: The first tool surface (11) is provided with a first positioning portion (111) configured to be in concave-convex cooperation with the pole (22) of the battery monomer (20); or / and The first tool surface (11) is provided with a second positioning portion (112) configured to be in concave-convex cooperation with the end cover (21).