CN219123347U - Battery cover plate and lithium ion battery - Google Patents
Battery cover plate and lithium ion battery Download PDFInfo
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- CN219123347U CN219123347U CN202223525650.7U CN202223525650U CN219123347U CN 219123347 U CN219123347 U CN 219123347U CN 202223525650 U CN202223525650 U CN 202223525650U CN 219123347 U CN219123347 U CN 219123347U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a battery cover plate and a lithium ion battery, wherein the battery cover plate comprises a cover plate body, an electrode and an injection molding piece, wherein the cover plate body is provided with a through hole, and the through hole penetrates through the cover plate body; the electrode comprises a first electrode and a second electrode which are arranged on the other side of the cover plate body, and the first electrode and the second electrode are both provided with a pole in a protruding mode, and the pole penetrates through the through hole; the injection molding piece is injected into the through hole and respectively surrounds the pole post of the first electrode and the pole post of the second electrode, and the injection molding piece is connected with the cover plate body and the pole post. The technical scheme of the utility model aims to improve the production efficiency of the battery cover plate and the practicability of the battery cover plate.
Description
Technical Field
The utility model relates to the technical field of lithium batteries, in particular to a battery cover plate and a lithium ion battery.
Background
In the prior art, most of lithium ion batteries utilize two poles of a battery cover plate to be conducted with the inside of a battery body to form an anode and a cathode of the lithium ion battery, so that external equipment is connected with the two poles of the battery cover plate to realize discharging or charging of the lithium ion battery.
The prior battery cover plate is mostly formed by injection molding the nail pole and the welding piece into a whole, and then the welding piece is welded on the base plate to lead the nail pole to be a battery anode and a battery cathode. However, the efficiency of producing the battery cover plate by adopting the welding mode is lower, the cost is higher, and the substrate is easy to deform in the welding process, so that the practicability of the battery cover plate is poor.
Disclosure of Invention
The utility model mainly aims to provide a battery cover plate, which aims to improve the production efficiency of the battery cover plate and the practicability of the battery cover plate.
In order to achieve the above purpose, the battery cover plate provided by the utility model comprises a cover plate body, an electrode and an injection molding piece, wherein the cover plate body is provided with a through hole, and the through hole penetrates through the cover plate body; the electrode comprises a first electrode and a second electrode which are arranged on the other side of the cover plate body, and the first electrode and the second electrode are both provided with a pole in a protruding mode, and the pole penetrates through the through hole; the injection molding piece is injected into the through hole and respectively surrounds the pole post of the first electrode and the pole post of the second electrode, and the injection molding piece is connected with the cover plate body and the pole post.
Optionally, a threaded structure is arranged on the periphery of the pole, and the injection molding part is arranged in the threaded structure.
Optionally, the thread structure includes a first thread and a second thread, the first thread and the second thread are sequentially disposed along a height direction of the pole, and a rotation direction of the first thread is opposite to a rotation direction of the second thread.
Optionally, the cover plate body is provided with a containing groove on the wall of the through hole, and the injection molding part is partially arranged in the containing groove.
Optionally, the accommodating groove is arranged on the surface of the cover plate body and surrounds the through hole, a receiving table is formed on the periphery of the through hole at the bottom wall of the accommodating groove, and the injection molding part is partially injection molded on the table top of the receiving table.
Optionally, the surface of apron body still is equipped with the spacing groove, the spacing groove is located the week side of holding groove, and intercommunication the holding groove, the injection molding part is located in the spacing groove.
Optionally, the first electrode is defined as a positive electrode of the battery, and the second electrode is defined as a negative electrode of the battery. The injection molding piece of the pole post, which is connected with the first electrode, is defined to be a first injection molding piece, the injection molding piece of the pole post, which is connected with the second electrode, is defined to be a second injection molding piece, the material of the first injection molding piece is conductive plastic, and the material of the second injection molding piece is insulating plastic.
Optionally, the cover plate body is provided with two through holes, the pole of the first electrode and the first injection molding piece are arranged in one through hole, and the pole of the second electrode and the second injection molding piece are arranged in the other through hole.
Optionally, the cover plate body includes base plate and insulating mounting panel, insulating mounting panel connect in the base plate, the through-hole runs through insulating mounting panel with the base plate sets up, first electrode with the second electrode butt in insulating mounting panel is opposite to the surface of base plate.
Optionally, the first electrode and the second electrode are both provided with sealing rings, and the sealing rings are sleeved on the polar posts and are arranged between the base plate and the insulating mounting plate.
Optionally, the base plate is equipped with the venthole, battery apron still includes explosion-proof valve, explosion-proof valve install in the base plate is facing away from the surface of insulating mounting panel, and shroud the venthole, insulating mounting panel is equipped with the intercommunication the dodge hole of venthole.
Optionally, a mounting groove is further formed in the surface of the base plate, the air outlet hole is formed in the bottom wall of the mounting groove, and the explosion-proof valve is arranged in the mounting groove. And/or, the cover plate body further comprises a protection piece, wherein the protection piece is connected to the surface of the base plate and covers the explosion-proof valve. And/or, the cover plate body further comprises a filter screen, the filter screen is arranged between the base plate and the insulating mounting plate, covers the air outlet hole, and is arranged towards the avoidance hole.
Optionally, the first electrode comprises a first polar plate and the polar post protruding from the surface of the first polar plate, and the first electrode is formed by stamping. And/or the second electrode comprises a second polar plate and the polar post protruding from the surface of the second polar plate, and the second electrode is formed by stamping.
The utility model also provides a lithium ion battery, which comprises a battery body and a battery cover plate, wherein the battery cover plate is the battery cover plate, and the battery cover plate is connected with the battery body.
According to the technical scheme, through the through hole penetrating the cover plate body is formed in the cover plate body, the first electrode and the second electrode are arranged on one side of the cover plate body, the pole columns of the first electrode and the second electrode are respectively penetrated through the through hole from one side of the cover plate body, then the injection molding piece is filled in the through hole, the injection molding piece is formed around the pole columns of the first electrode and the pole columns of the second electrode respectively, the first electrode and the second electrode are prevented from being in direct contact conduction in the through hole or being in conduction through the cover plate body to cause short circuit, the cover plate body and the pole columns are connected through the injection molding piece, the cover plate body and the electrodes are integrally formed, and the pole columns of the first electrode and the second electrode are connected to the cover plate body to form the positive electrode and the negative electrode of the battery cover plate. Through utilizing the injection molding to mould plastics and fill at through-hole internal connection utmost point post and apron body, can reduce the welding procedure of battery apron, be favorable to avoiding battery apron to take place to warp in the welding process for battery apron's overall structure stability is better. And the cost of the injection molding material is lower, the processing procedure is simple and convenient, the production efficiency of the battery cover plate is effectively improved, the production cost is reduced, and the practicability of the battery cover plate is improved.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is an exploded view of one embodiment of a battery cover plate of the present utility model;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a bottom structural view of one embodiment of the battery cover plate of FIG. 1;
FIG. 4 is a three-dimensional block diagram of one embodiment of a first electrode or a second electrode of the battery cover plate of FIG. 1;
FIG. 5 is a front view of an embodiment of the first electrode or the second electrode of FIG. 4;
fig. 6 is a cross-sectional view of an embodiment of the first electrode or the second electrode of fig. 4.
Reference numerals illustrate:
| reference numerals | Name of the name | Reference numerals | Name of the |
| 100 | |
30 | |
| 10 | |
31 | |
| 11 | |
311 | First |
| 111 | Accommodating |
33 | |
| 1111 | Through |
331 | |
| 1113 | Bearing table | 35 | |
| 113 | Limiting |
351 | |
| 115 | Air outlet hole | 3511 | |
| 117 | Mounting groove | 3513 | |
| 13 | Insulating |
37 | |
| 131 | |
50 | |
| 15 | |
70 | Explosion- |
| 17 | Filter screen |
The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout is meant to include three side-by-side schemes, for example, "a and/or B", including a scheme, or B scheme, or a scheme that is satisfied by both a and B. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.
Most of the prior battery cover plates are formed by injection molding the nail pole column and the welding piece into a whole, and then the welding piece is welded on the base plate to enable the nail pole column to be used as a battery anode and a battery cathode. However, the efficiency of producing the battery cover plate by adopting the welding mode is lower, the cost is higher, and the substrate is easy to deform in the welding process, so that the practicability of the battery cover plate is poor. In view of the above problems, the present utility model proposes a battery cover plate 100.
Referring to fig. 1 to 6, in an embodiment of the present utility model, the battery cover 100 includes a cover body 10, an electrode 30, and an injection molding member 50, the cover body 10 is provided with a through hole 1111, and the through hole 1111 is provided through the cover body 10; the electrode 30 includes a first electrode 31 and a second electrode 33 disposed on the other side of the cover body 10, and the first electrode 31 and the second electrode 33 are each provided with a pole 35, where the pole 35 penetrates through the through hole 1111; the injection molding member 50 is injected into the through hole 1111 and is disposed around the post 35 of the first electrode 31 and the post 35 of the second electrode 33, respectively, and the injection molding member 50 connects the cap body 10 and the post 35.
It can be understood that the battery cover 100 can be assembled on the battery body to form a lithium ion battery after the battery body is produced, and the first electrode 31 and the second electrode 33 on the battery cover 100 can be conducted with the inside of the battery body, so that the post 35 of the first electrode 31 and the post 35 of the second electrode 33 form the positive electrode and the negative electrode of the lithium ion battery, and external equipment can be respectively connected to the post 35 of the first electrode 31 and the post 35 of the second electrode 33 to form a closed-loop circuit, thereby realizing the charge and discharge of the lithium ion battery. At this time, the post 35 may be partially protruded at a side of the cap plate body 10 facing away from the battery body, or accommodated in the through hole 1111 and a top surface of the post 35 is exposed in the through hole 1111 to facilitate connection of the lithium ion battery. The cover body 10 of the battery cover 100 may be made of an insulating material, and by arranging the first electrode 31 and the second electrode 33 on the cover body 10 at intervals, it is able to avoid that the first electrode 31 and the second electrode 33 are directly conducted through the cover body 10 to form a short circuit; alternatively, an insulating member may be disposed between the first electrode 31 and/or the second electrode 33 and the cover body 10, so that the conduction between the first electrode 31 and the second electrode 33 is blocked by the insulating member; or the injection molding piece 50 is made of insulating plastic material, and the injection molding piece 50 is utilized to surround the pole post 35 of the first electrode 31 and the pole post 35 of the second electrode 33 respectively, so that the injection molding piece 50 can isolate the contact between the first electrode 31 and the second electrode 33 and the cover plate body 10, and effectively isolate the mutual contact conduction between the first electrode 31 and the second electrode 33, thereby ensuring the normal operation of the lithium ion battery. Wherein, the wall of the through hole 1111 and the outer surface of the pole 35 may be roughened, which is favorable to improving the adhesion of the injection molding piece 50 on the wall of the through hole 1111 and the outer surface of the pole 35, so that the injection molding piece 50 can better adhere to the through hole 1111 and the pole 35 after injection molding, which is favorable to further avoiding the injection molding piece 50 from separating from the through hole 1111, and the connection between the cover plate body 10 and the pole 35 is more stable and reliable. Next, the injection molding material 50 may be plugged by a plugging material provided on the surface of the cover plate body 10 at the periphery of the through-hole 1111, and the effect of preventing the injection molding material 50 from being separated from the through-hole 1111 may be achieved.
According to the technical scheme of the utility model, through holes 1111 penetrating through the cover plate body 10 are formed in the cover plate body 10, the first electrode 31 and the second electrode 33 are arranged on one side of the cover plate body 10, the pole posts 35 of the first electrode 31 and the second electrode 33 are respectively penetrated through the through holes 1111 from one side of the cover plate body 10, then injection molding pieces 50 are filled in the through holes 1111 to respectively surround the pole posts 35 of the first electrode 31 and the pole posts 35 of the second electrode 33, so that the first electrode 31 and the second electrode 33 are prevented from being in direct contact conduction in the through holes 1111 or being in conduction through the cover plate body 10 to cause short circuit, the cover plate body 10 and the pole posts 35 are connected through the injection molding pieces 50, the cover plate body 10 and the electrode 30 are integrally formed, and the pole posts 35 of the first electrode 31 and the second electrode 33 are connected to the cover plate body 10 to form the anode and the cathode of the battery cover plate 100. Through utilizing injection molding 50 to mould plastics and fill at through-hole 1111 internal connection utmost point post 35 and apron body 10, can reduce the welding process of battery apron 100, be favorable to avoiding battery apron 100 to take place to warp in the welding process for battery apron 100's overall structure stability is better. And the cost of the injection molding material is lower, the processing procedure is simple and convenient, the production efficiency of the battery cover plate 100 is effectively improved, the production cost is reduced, and the practicability of the battery cover plate 100 is improved.
Further, referring to fig. 4 and 5, in one embodiment of the present utility model, a screw structure 351 is provided on the circumferential side of the pole 35, and an injection molding 50 is partially provided in the screw structure 351.
It can be appreciated that, through setting up the screw structure 351 in the week side of utmost point post 35, can make the week side of utmost point post 35 form the latch that the spiral extends, at this moment, injection molding 50 can have part formation between the latch of screw structure 351 in the through-hole 1111 in-process injection molding, and then make screw structure 351 can block injection molding 50, be favorable to avoiding utmost point post 35 to break away from injection molding 50's connection, make injection molding 50 can stable connection on utmost point post 35, realize the stable connection of apron body 10 and utmost point post 35, further improve the connection stability of apron body 10 and electrode 30, improve battery cover 100's overall structure stability and reliability.
Further, referring to fig. 5, in one embodiment of the present utility model, the screw structure 351 includes first and second screws 3511 and 3513, the first and second screws 3511 and 3513 being sequentially disposed in a height direction of the pole 35, a rotation direction of the first screw 3511 being opposite to a rotation direction of the second screw 3513.
In this embodiment, by forming the first thread 3511 and the second thread 3513 with opposite rotation directions, two sections of structures with different extending directions can be formed on the pole 35 of the injection molding member 50, which is beneficial to enhancing the clamping effect of the thread structure 351 on the injection molding member 50 and improving the overall connection stability of the thread structure 351 and the injection molding member 50. Meanwhile, the part of the injection molding piece 50 formed in the first thread 3511 and the part formed in the second thread 3513 have different screwing directions, so that interlocking can be realized, the pole 35 and/or the injection molding piece 50 can be prevented from rotating in the through hole 1111 to separate the injection molding piece 50 from the pole 35, the connection stability between the electrode 30 and the injection molding piece 50 is further improved, and more stable and reliable connection of the battery cover plate 100 is realized.
Referring to fig. 1 and 2, in one embodiment of the present utility model, the cover body 10 is provided with a receiving groove 111 on a wall of the through hole 1111, and the injection molding member 50 is partially disposed in the receiving groove 111.
In this embodiment, by recessing the cover plate body 10 on the wall of the through hole 1111 to form the accommodating groove 111, the injection molding member 50 can partially flow into and be formed in the accommodating groove 111 during the injection molding process in the through hole 1111, so that the part of the injection molding member 50 formed in the accommodating groove 111 can be used as the integral limiting structure of the injection molding member 50, preventing the injection molding member 50 from separating from the through hole 1111, and the injection molding member 50 can more stably connect the pole 35 with the cover plate body 10, thereby further improving the connection stability of the cover plate body 10 and the electrode 30, and improving the overall structural stability and reliability of the battery cover plate 100. The accommodating groove 111 may be disposed around the wall of the through hole 1111, or a plurality of accommodating grooves 111 may be disposed on the wall of the through hole 1111 at intervals, which is beneficial to better increase the volume of the injection molding part 50 formed in the accommodating groove 111, and further improve the connection stability of the injection molding part 50 after molding.
Further, referring to fig. 1 and 2, in one embodiment of the present utility model, a receiving groove is formed on the surface of the cover body 10 and surrounds the through hole 1111, a receiving base 1113 is formed on the bottom wall of the receiving groove 111 at the periphery of the through hole 1111, and the injection molding member 50 is partially injection molded on the surface of the receiving base 1113.
In the present embodiment, the bottom wall of the accommodation groove 111 may be provided on the surface of the cover plate body 10 and around the through hole 1111, and the portion of the bottom wall of the accommodation groove 111 between the inner walls of the accommodation groove 111 at the periphery of the through hole 1111 may form the receiving platform 1113. At this time, the injection molding member 50 can be simultaneously adhered to the supporting table 1113, the hole wall of the through hole 1111 and the pole 35 during injection molding in the accommodating groove 111, at this time, a certain rough surface or a raised structure can be formed on the table top of the supporting table 1113 and the outer circumferential surface of the pole 35 to enhance the adhesion force of the injection molding member 50, so that the injection molding member 50 can be stably molded in the through hole 1111, and the injection molding member 50 can be effectively prevented from being separated from the accommodating groove 111 through the through hole 1111 under the action of the supporting table 1113, so that the stable connection between the injection molding member 50 and the pole 35 and the accommodating groove 111 is realized, and the connection stability and reliability of the electrode 30 and the cover plate body 10 are further improved. The injection molding piece 50 can also cover the whole accommodating groove 111 for molding, which is beneficial to further increasing the area of the injection molding piece 50 for connecting the pole 35 with the accommodating groove 111, further improving the connecting effect of the injection molding piece 50 and realizing more stable and reliable connection.
Further, referring to fig. 1 and 2, in an embodiment of the present utility model, a limiting groove 113 is further formed on the surface of the cover body 10, the limiting groove 113 is disposed on the peripheral side of the accommodating groove 111 and is communicated with the accommodating groove 111, and the injection molding member 50 is partially disposed in the limiting groove 113.
In this embodiment, by providing the limiting groove 113 on the peripheral side of the accommodating groove 111, the injection molding piece 50 can be partially molded in the limiting groove 113 in the injection molding process, so that the injection molding piece 50 can be limited and fixed under the action of the limiting groove 113, the injection molding piece 50 is further prevented from being separated from the accommodating groove 111, and meanwhile, the injection molding piece 50 can be prevented from rotating in the accommodating groove 111 when the accommodating groove 111 is circular, so that the injection molding piece 50 is separated from the pole 35, and the connection stability of the electrode 30 and the cover plate body 10 is further improved. Wherein, the quantity of spacing groove 113 can be a plurality of, and a plurality of spacing groove 113 intervals set up around holding groove 111, through setting up a plurality of spacing grooves 113, can further improve the whole fixed spacing effect to injection molding 50 of spacing groove 113 for injection molding 50 can set up in spacing groove 113 more steadily, further improves battery cover plate 100's overall structure stability and reliability. The shape of the limiting groove 113 may be a regular shape such as a circular arc or a square, which is beneficial to further improving the processing convenience of the limiting groove 113 and further improving the production efficiency of the battery cover plate 100.
In one embodiment of the present utility model, the first electrode 31 is defined as a battery positive electrode and the second electrode 33 is defined as a battery negative electrode. The injection molding member 50 defining the pole 35 connected to the first electrode 31 is a first injection molding member 50, the injection molding member 50 connecting to the pole 35 of the second electrode 33 is a second injection molding member 50, the first injection molding member 50 is made of conductive plastic, and the second injection molding member 50 is made of insulating plastic.
In this embodiment, the material of the cover body 10 may be conductive metal, and after the battery cover 100 is covered on the battery body, the cover body 10 may abut against the metal casing of the battery body, so that the battery cover 100 and the battery body may form a whole better. At this time, the first injection molding piece 50 formed by conductive plastic with certain conductivity is used for connecting the pole post 35 of the first electrode 31 and the cover plate body 10, so that positrons on the pole post 35 of the first electrode 31 can be transferred to the cover plate body 10 through the first injection molding piece 50 and then conducted to the technical shell of the battery body through the cover plate body 10, and then the whole lithium ion battery can be positively charged, so that the lithium ion battery can form certain anode protection characteristic, certain stable balance can be kept in natural environment, corrosion of the lithium ion battery in daily use is prevented, and the overall structural stability and reliability of the lithium ion battery are further improved. The second injection molding piece 50 connected with the second electrode 33 and the cover plate body 10 can be made of insulating plastic materials, so that the second electrode 33 and the cover plate body 10 can be electrically isolated under the action of the second injection molding piece 50, the second electrode 33 forming a battery cathode is prevented from being directly conducted with the first electrode 31 through the cover plate body 10 to enable the lithium ion battery to be short-circuited, negative electrons on the second electrode 33 can be prevented from being transferred to the cover plate body 10 and positrons on the cover plate body 10, the integral positive charging of the lithium ion battery is influenced, the steady balance of the lithium ion battery is further guaranteed, and the practicability of the lithium ion battery is further improved.
Further, referring to fig. 1, in one embodiment of the present utility model, the cover body 10 is provided with two through holes 1111, the post 35 of the first electrode 31 and the first injection molding member are provided in one through hole 1111, and the post 35 of the second electrode 33 and the second injection molding member are provided in the other through hole 1111.
It will be appreciated that the cover body 10 may be provided with only one through hole 1111 with a larger size, such that the post 35 of the first electrode 31 and the post 35 of the second electrode 33 may be disposed in the through hole 1111 at intervals, at this time, a partition may be first utilized to separate the post 35 of the first electrode 31 and the post 35 of the second electrode 33 in the through hole 1111, then a second injection molding member is injected around the post 35 of the second electrode 33, after the second injection molding member is formed, the partition is removed, and then a first injection molding member is injected around the post 35 of the first electrode 31, so that the first injection molding member connects the post 35 of the first electrode 31 with the cover body 10, and the second injection molding member connects the post 35 of the second electrode 33 with the cover body 10. In this embodiment, the cover body 10 may be provided with two through holes 1111, the two through holes 1111 are arranged on the cover body 10 at intervals, and the post 35 of the first electrode 31 and the first injection molding member are arranged in one through hole 1111, and the post 35 of the second electrode 33 and the second injection molding member are arranged in the other through hole 1111, so that the first injection molding member and the second injection molding member can be respectively injection molded in the two through holes 1111 at the same time, which is beneficial to better simplifying the processing procedure of the injection molding member 50, improving the production efficiency of the battery cover 100, and further improving the practicality and the structural reliability of the battery cover 100. The two through holes 1111 formed in the cover body 10 are used to respectively pass through the post 35 of the first electrode 31 and the post 35 of the second electrode 33, which is also beneficial to better separate the first electrode 31 and the second electrode 33 from each other on the cover body 10, further preventing the first electrode 31 from conducting with the second electrode 33 to generate a short circuit, and better improving the structural reliability and stability of the battery cover 100.
Referring to fig. 1, in one embodiment of the present utility model, the cover body 10 includes a substrate 11 and an insulating mounting plate 13, the insulating mounting plate 13 is connected to the substrate 11, the through hole 1111 is provided through the insulating mounting plate 13 and the substrate 11, and the first electrode 31 and the second electrode 33 are abutted against a surface of the insulating mounting plate 13 facing away from the substrate 11.
It can be appreciated that the insulating mounting plate 13 can be arranged in the shell of the battery body, so that the direct conduction between the substrate 11 and the battery body can be effectively isolated, and the normal use of the lithium ion battery can be ensured. In this embodiment, the through hole 1111 may penetrate through the insulating mounting plate 13 and the substrate 11, at this time, the injection molding member 50 made of insulating plastic may be injection molded in the through hole 1111, so that the insulating mounting plate 13 and the injection molding member 50 isolate the first electrode 31 and the second electrode 33 from conduction to cause the battery cover plate 100 to be shorted, and the overall structural reliability of the battery cover plate 100 is further improved. By abutting the first electrode 31 and the second electrode 33 against the surface of the insulating mounting plate 13 facing away from the substrate 11, the first electrode 31 and the second electrode 33 can be well prevented from being separated from the battery cover 100 from the side of the substrate 11 facing away from the insulating mounting plate 13, and the structural stability of the battery cover 100 can be further improved. Meanwhile, the wall of the through hole 1111 may have a concave structure or a convex structure, so that the injection molding piece 50 can limit the injection molding piece 50 by using the concave structure or the convex structure when the injection molding piece 50 is formed in the through hole 1111 of the substrate 11 and the insulating mounting plate 13, thereby being beneficial to further improving the connection stability between the injection molding piece 50 and the electrode 30 and between the substrate 11 and the insulating mounting plate 13 under the effect of the abutting limit of the first electrode 31 and the second electrode 33 and the insulating mounting plate 13, and enabling the overall structure of the battery cover plate 100 to be more stable and reliable. Wherein, the periphery side of insulating mounting panel 13 can be protruding to be equipped with the locating part to make the locating part butt at the shells inner wall of battery body, be favorable to spacing fixed battery apron 100 after battery apron 100 installation, prevent battery apron 100 skew, further improve battery apron 100's stability. The substrate 11 can be fixed on the housing of the battery body by screws, or the substrate 11 can be clamped and fixed by the clamping piece, so that the assembly of the battery cover plate 100 and the battery body is realized, and the assembly efficiency of the lithium ion battery is improved.
Further, referring to fig. 1, in one embodiment of the present utility model, each of the first electrode 31 and the second electrode 33 is provided with a seal ring 37, and the seal ring 37 is sleeved on the post 35 and is disposed between the substrate 11 and the insulating mounting plate 13.
In this embodiment, the sealing ring 37 is used to sleeve the pole 35 and is disposed between the substrate 11 and the insulating mounting plate 13, so that the sealing ring 37 can be used to effectively seal the gap between the pole 35 and the substrate 11 and between the sealing ring 37 and the insulating mounting plate 13, which is beneficial to preventing the electrolyte in the battery body from flowing out of the lithium ion battery from the gap between the pole 35 and the substrate 11 and between the sealing ring and the insulating mounting plate 13, further improving the tightness of the lithium ion battery and ensuring the normal use of the lithium ion battery. The sealing ring 37 may be a sealing ring 37 with good elasticity such as rubber or silica gel, so that the sealing ring 37 may better seal the gap between the pole 35 and the substrate 11 and the insulating mounting plate 13, and further improve the overall structural stability and reliability of the battery cover plate 100.
Further, referring to fig. 1 and 3, in one embodiment of the present utility model, the base plate 11 is provided with the air outlet hole 115, the battery cover plate 100 further includes the explosion-proof valve 70, the explosion-proof valve 70 is mounted on the surface of the base plate 11 facing away from the insulating mounting plate 13, and covers the air outlet hole 115, and the insulating mounting plate 13 is provided with the escape hole 131 communicating with the air outlet hole 115.
In this embodiment, by arranging the explosion-proof valve 70 on the substrate 11 to cover the air outlet hole 115 and arranging the avoidance hole 131 communicating with the air outlet hole 115 on the insulating mounting plate 13, when the lithium ion battery is improperly used and expanded, the explosion-proof valve 70 can be triggered by the gas generated by expanding the lithium ion battery, so that the explosion-proof valve 70 can exhaust the lithium battery, and the lithium battery is controlled to be powered off, so that the expansion explosion of the lithium battery is avoided, the safety performance of the lithium battery is further improved, and the reliability and stability of the battery cover plate 100 are further improved.
Referring to the drawings, in one embodiment of the present utility model, the surface of the base plate 11 is further provided with a mounting groove 117, the gas outlet hole 115 is provided at the bottom wall of the mounting groove 117, and the explosion-proof valve 70 is provided in the mounting groove 117. And/or, the cover plate body 10 further includes a protection member 15, and the protection member 15 is connected to the surface of the base plate 11 and is disposed to cover the explosion-proof valve 70. And/or, the cover plate body 10 further comprises a filter screen 17, the filter screen 17 is arranged between the base plate 11 and the insulating mounting plate 13 and covers the air outlet hole 115, and the filter screen 17 is arranged towards the avoidance hole 131.
In this embodiment, by providing the installation groove 117 on the base plate 11 and providing the air outlet hole 115 at the bottom of the installation groove 117, the explosion-proof valve 70 can be installed in the installation groove 117, so that the protrusion of the explosion-proof valve 70 on the base plate 11 is reduced, the overall thickness of the battery cover plate 100 is further reduced, and the design of the battery cover plate 100 is simplified. The mounting table is formed on the periphery of the air outlet hole 115 on the bottom wall of the mounting groove 117, so that the explosion-proof valve 70 is arranged in the mounting groove 117 and can be directly placed on the mounting table for mounting, thereby being beneficial to further improving the assembly convenience of the explosion-proof valve 70 and further improving the mounting efficiency of the lithium ion battery.
By arranging the protection piece 15 on the surface of the substrate 11 to cover the explosion-proof valve 70, impurities outside the lithium ion battery or liquid contacting the explosion-proof valve 70 can be isolated by the protection piece 15 to influence the normal use of the explosion-proof valve 70, so that the protection piece 15 can better protect the explosion-proof valve 70 when the explosion-proof valve 70 is not triggered, and the overall structural stability and reliability of the battery cover plate 100 are further improved. The protection piece 15 may be a film attached to the substrate 11 and covering the explosion-proof valve 70, so that when the explosion-proof valve 70 is triggered, high-pressure air flow can be released to break the protection piece 15, so that air in the lithium ion battery can be rapidly discharged, and the reliability and practicality of the lithium ion battery are further improved.
Secondly, through setting up filter screen 17 shroud venthole 115 at the opposite side of base plate 11 to make filter screen 17 set up towards the dodge hole 131 of insulating mounting panel 13, can utilize filter screen 17 keep apart liquid or solid in the lithium ion battery, only allow gas to pass through trigger explosion-proof valve 70, and then avoid liquid and solid in the lithium ion battery to influence explosion-proof valve 70, and filter screen 17 can also block liquid and solid in the lithium ion battery and leak the base plate 11 outside through explosion-proof valve 70 after taking place to expand, further improved the practicality and the reliability of battery apron 100, make battery apron 100 have certain protective properties. The filter screen 17 can adopt a metal filter screen 17 with high temperature resistance, which is favorable for preventing the filter screen 17 from being melted under the high temperature effect in the lithium ion battery, further improves the stability and reliability of the whole structure of the battery cover plate 100, and improves the practicability of the lithium ion battery.
Referring to fig. 5 and 6, in one embodiment of the present utility model, the first electrode 31 includes a first electrode plate 311 and a post 35 protruding from a surface of the first electrode plate 311, and the first electrode 31 is press-molded. And/or the second electrode 33 comprises a second electrode plate 331 and a pole post 35 protruding from the surface of the second electrode plate 331, and the second electrode 33 is formed by stamping.
In this embodiment, the first electrode 31 and/or the second electrode 33 may be stamped on the first electrode plate 311 and/or the second electrode plate 331 by using a stamping device to form the electrode post 35, and by applying pressure on a certain position of the first electrode plate 311 and/or the second electrode plate 331, the plate is plastically deformed and then the other surface is convexly formed into the electrode post 35 with a hollow interior. The first electrode 31 and/or the second electrode 33 formed by stamping can better enable the first electrode 31 and/or the second electrode 33 to form an integrated structure, so that the overall structural stability of the electrode 30 is better, the production process of the electrode 30 is better simplified, the assembly efficiency of the battery cover plate 100 is improved, and the production efficiency of the lithium ion battery is further improved. While also facilitating a reduction in the overall weight of the first electrode 31 and/or the second electrode 33, facilitating a lightweight design of the battery cover 100.
The utility model also provides a lithium ion battery, which comprises a battery body and a battery cover plate 100, wherein the specific structure of the battery cover plate 100 refers to the embodiment, and the lithium ion battery at least has all the beneficial effects brought by the technical proposal of the embodiment because the lithium ion battery adopts all the technical proposal of the embodiment, and the detailed description is omitted. Wherein, the battery cover plate 100 is connected to the battery body.
The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structural changes made by the description of the present utility model and the accompanying drawings or direct/indirect application in other related technical fields are included in the scope of the utility model.
Claims (14)
1. A battery cover plate, the battery cover plate comprising:
the cover plate body is provided with a through hole, and the through hole penetrates through the cover plate body;
the electrode comprises a first electrode and a second electrode which are arranged on the other side of the cover plate body, and the first electrode and the second electrode are both provided with a pole in a protruding mode, and the pole penetrates through the through hole; and
the injection molding piece is injected into the through hole and respectively surrounds the pole post of the first electrode and the pole post of the second electrode, and the injection molding piece is connected with the cover plate body and the pole post.
2. The battery cover plate of claim 1, wherein the peripheral side of the post is provided with a threaded structure, and the injection molded part is partially disposed within the threaded structure.
3. The battery cover plate of claim 2, wherein the thread structure comprises a first thread and a second thread, the first thread and the second thread being disposed in sequence along a height direction of the post, a direction of rotation of the first thread being opposite to a direction of rotation of the second thread.
4. The battery cover plate according to claim 1, wherein the cover plate body is provided with a containing groove on the wall of the through hole, and the injection molding part is partially arranged in the containing groove.
5. The battery cover plate according to claim 4, wherein the accommodating groove is formed on the surface of the cover plate body and surrounds the through hole, a receiving table is formed on the periphery of the through hole by the groove bottom wall of the accommodating groove, and the injection molding part is partially injection molded on the table surface of the receiving table.
6. The battery cover plate according to claim 5, wherein a limiting groove is further formed in the surface of the cover plate body, the limiting groove is formed in the periphery of the accommodating groove and is communicated with the accommodating groove, and the injection molding part is partially arranged in the limiting groove.
7. The battery cover of any one of claims 1 to 6, wherein the first electrode is defined as a battery positive electrode and the second electrode is defined as a battery negative electrode;
the injection molding piece of the pole post, which is connected with the first electrode, is defined to be a first injection molding piece, the injection molding piece of the pole post, which is connected with the second electrode, is defined to be a second injection molding piece, the material of the first injection molding piece is conductive plastic, and the material of the second injection molding piece is insulating plastic.
8. The battery cover as claimed in claim 7, wherein the cover body is provided with two through holes, the post of the first electrode and the first injection-molded member are provided in one through hole, and the post of the second electrode and the second injection-molded member are provided in the other through hole.
9. The battery cover according to any one of claims 1 to 6, wherein the cover body includes:
a substrate; and
the insulating mounting plate is connected to the base plate, the through hole penetrates through the insulating mounting plate and the base plate, and the first electrode and the second electrode are abutted to the surface, opposite to the base plate, of the insulating mounting plate.
10. The battery cover of claim 9, wherein the first electrode and the second electrode are each provided with a sealing ring, the sealing rings being sleeved on the posts and disposed between the base plate and the insulating mounting plate.
11. The battery cover plate of claim 9, wherein the base plate is provided with an air outlet, the battery cover plate further comprises an explosion-proof valve, the explosion-proof valve is mounted on the surface of the base plate opposite to the insulating mounting plate and covers the air outlet, and the insulating mounting plate is provided with an avoidance hole communicated with the air outlet.
12. The battery cover plate according to claim 11, wherein the surface of the base plate is further provided with a mounting groove, the air outlet hole is formed in the bottom wall of the mounting groove, and the explosion-proof valve is arranged in the mounting groove;
and/or, the cover plate body further comprises a protection piece, wherein the protection piece is connected to the surface of the base plate and covers the explosion-proof valve;
and/or, the cover plate body further comprises a filter screen, the filter screen is arranged between the base plate and the insulating mounting plate, covers the air outlet hole, and is arranged towards the avoidance hole.
13. The battery cover plate according to any one of claims 1 to 6, wherein the first electrode includes a first electrode plate and the electrode post protruding from a surface of the first electrode plate, and the first electrode is formed by punching;
and/or the second electrode comprises a second polar plate and the polar post protruding from the surface of the second polar plate, and the second electrode is formed by stamping.
14. A lithium ion battery, characterized in that the lithium ion battery comprises a battery body and a battery cover plate, wherein the battery cover plate is the battery cover plate according to any one of claims 1 to 13, and the battery cover plate is connected to the battery body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223525650.7U CN219123347U (en) | 2022-12-22 | 2022-12-22 | Battery cover plate and lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223525650.7U CN219123347U (en) | 2022-12-22 | 2022-12-22 | Battery cover plate and lithium ion battery |
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| Publication Number | Publication Date |
|---|---|
| CN219123347U true CN219123347U (en) | 2023-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223525650.7U Active CN219123347U (en) | 2022-12-22 | 2022-12-22 | Battery cover plate and lithium ion battery |
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| CN (1) | CN219123347U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116565479A (en) * | 2023-07-12 | 2023-08-08 | 深圳海辰储能控制技术有限公司 | End cover assembly, energy storage device and electric equipment |
| CN116581448A (en) * | 2023-07-12 | 2023-08-11 | 深圳海辰储能控制技术有限公司 | End cover assembly, energy storage device and electric equipment |
-
2022
- 2022-12-22 CN CN202223525650.7U patent/CN219123347U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116565479A (en) * | 2023-07-12 | 2023-08-08 | 深圳海辰储能控制技术有限公司 | End cover assembly, energy storage device and electric equipment |
| CN116581448A (en) * | 2023-07-12 | 2023-08-11 | 深圳海辰储能控制技术有限公司 | End cover assembly, energy storage device and electric equipment |
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