CN220652304U - Battery assembly and battery - Google Patents
Battery assembly and battery Download PDFInfo
- Publication number
- CN220652304U CN220652304U CN202322309454.4U CN202322309454U CN220652304U CN 220652304 U CN220652304 U CN 220652304U CN 202322309454 U CN202322309454 U CN 202322309454U CN 220652304 U CN220652304 U CN 220652304U
- Authority
- CN
- China
- Prior art keywords
- battery
- pole
- sealing
- battery assembly
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 79
- 230000000149 penetrating effect Effects 0.000 claims abstract description 6
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000003792 electrolyte Substances 0.000 abstract description 24
- 239000007788 liquid Substances 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 150000002500 ions Chemical class 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000007306 turnover Effects 0.000 description 4
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 2
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002637 fluid replacement therapy Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 229910001416 lithium ion Inorganic materials 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910001415 sodium ion Inorganic materials 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000005486 organic electrolyte Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000007784 solid electrolyte Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Connection Of Batteries Or Terminals (AREA)
Abstract
The utility model discloses a battery assembly and a battery, the battery assembly comprises: the battery comprises a pole, a through hole penetrating the pole along the radial direction of the battery, a shell and a sealing piece, wherein the pole is in sealing connection with the shell, a multi-stage step is arranged in the through hole, and the sealing piece is arranged at the position of one stage step in the multi-stage step and is in sealing connection with the pole. The battery assembly is characterized in that a multi-stage step is arranged in the through hole, the sealing element is arranged at one stage step of the multi-stage step and is in sealing connection with the pole, and the battery can be sealed for multiple times after liquid is filled or supplemented into the battery through the through hole, for example, in the production and assembly stage of the battery, after the liquid is filled into the battery, a first sealing element is arranged on a first stage, and the first sealing element and the pole are welded and sealed to form the battery; in the electrolyte replenishing stage of the battery, the first sealing element is damaged, electrolyte is replenished into the battery, the second sealing element is placed on the second step, and the second sealing element and the pole are welded and sealed, so that electrolyte replenishing of the battery is completed.
Description
Technical Field
The utility model relates to the technical field of battery manufacturing, in particular to a battery assembly and a battery.
Background
The ion battery has the advantages of high energy density, excellent power performance, long cycle life and the like, and is widely popularized and applied in the fields of modern electronic products and new energy vehicles. In the conventional ion battery, a graphite negative electrode, a high-voltage positive electrode and liquid organic electrolyte are generally adopted, wherein in the battery formation process, part of the electrolyte is reduced on the surface of the negative electrode to form a solid electrolyte interface film SEI, and part of the electrolyte is oxidized on the surface of the positive electrode to form an electrolyte interface film CEI. In the use process of the battery, the electrolyte continuously reacts with the anode and the cathode of the battery to cause the electrolyte to be consumed, so that in many cases, the service life of the battery is finished due to insufficient electrolyte remained in the battery.
Conventional lead-acid batteries, nickel-hydrogen or nickel-cadmium batteries, and the like, employ aqueous electrolyte as the electrolyte, and when the life of the battery is reduced or nearly terminated, the service life can be prolonged by adding the electrolyte. However, the ion battery is extremely sensitive to moisture and has extremely high requirements on the reliability of sealing, so that an effective fluid replacement technology is lacking at present to prolong the service life of the battery.
Disclosure of Invention
The utility model provides a battery assembly and a battery, which are used for solving the problem that the prior art lacks an effective fluid replacement technology to prolong the service life of the battery.
In order to solve the above technical problems, according to an aspect of the present utility model, there is provided a battery assembly including: the battery comprises a pole column, a through hole penetrating through the pole column in the radial direction of the battery, a shell and a sealing piece, wherein the pole column is in sealing connection with the shell, a plurality of steps are arranged in the through hole, and the sealing piece is arranged at one step of the plurality of steps and is in sealing connection with the pole column.
In some embodiments, the post is located at a central position of the battery end face, and the through hole is located at a central position of the post.
In some embodiments, the electrode post is a positive electrode post.
In some embodiments, the battery assembly further comprises: and the insulating sealing member is positioned between the shell and the pole and used for sealing the shell and the pole and insulating the shell and the pole.
In some embodiments, the outer sidewall of the pole is a concave structure, and the insulating sealing member is disposed in the concave structure for sealing and securing the housing into the concave structure.
In some embodiments, the battery assembly further comprises: and the insulating component extends synchronously with the shell and is used for insulating the pole post from the internal components of the battery core.
In some embodiments, the battery assembly further comprises: and a sealing plug arranged in the through hole and arranged at the lower part of the sealing piece.
In some embodiments, the terminal includes a protrusion disposed at a bottom center position thereof, the protrusion having an outer circumferential dimension that gradually decreases in a direction of the cell internal component.
In some embodiments, an electrical connection portion connected to the internal components of the cell is provided in the middle of the through hole.
According to another aspect of the present utility model, there is provided a battery including the battery assembly as described above.
Compared with the prior art, the utility model has the following advantages:
the battery pack provided by the utility model comprises: the battery comprises a pole, a through hole penetrating the pole along the radial direction of the battery, a shell and a sealing piece, wherein the pole is in sealing connection with the shell, a multi-stage step is arranged in the through hole, and the sealing piece is arranged at the position of one stage step in the multi-stage step and is in sealing connection with the pole. The battery assembly is characterized in that a multi-stage step is arranged in the through hole, the sealing element is arranged at one stage step of the multi-stage step and is in sealing connection with the pole, and the battery can be sealed for multiple times after liquid is filled or supplemented into the battery through the through hole, for example, in the production and assembly stage of the battery, after the liquid is filled into the battery, a first sealing element is arranged on a first stage, and the first sealing element and the pole are welded and sealed to form the battery; in the electrolyte replenishing stage of the battery, the first sealing element is damaged, electrolyte is replenished into the battery, the second sealing element is placed on the second step, and the second sealing element and the pole are welded and sealed, so that electrolyte replenishing of the battery is completed.
Drawings
Fig. 1 is a schematic cross-sectional view of a battery assembly provided in an embodiment of the present application;
fig. 2 is an exploded view of a battery assembly provided in an embodiment of the present application;
FIG. 3 is another cross-sectional schematic view of a battery assembly provided in an embodiment of the present application;
FIG. 4 is another cross-sectional schematic view of a battery assembly provided in an embodiment of the present application;
FIG. 5 is another cross-sectional schematic view of a battery assembly provided in an embodiment of the present application;
FIG. 6 is a schematic cross-sectional view of a battery provided in an embodiment of the present application;
the drawings are marked with the following description:
post 101, insulating sealing member 102, housing 103, insulator 104, through-hole 105, sealing plug 106, electrical connection 107, first step 108, first seal 109, second step 110, second seal 111, projection 120, turnover 121, battery assembly 601, jellyroll assembly 602, positive current collecting assembly 603, central shaft 604, negative current collecting assembly 605, negative cap plate 606
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than those herein described, and those skilled in the art will readily appreciate that the present utility model may be similarly embodied without departing from the spirit or essential characteristics thereof, and therefore the present utility model is not limited to the specific embodiments disclosed below.
Most of new energy vehicles adopt ion batteries (such as lithium ion batteries, sodium ion batteries and the like) as power sources, and as a large number of ion batteries are retired after long-term use, and as the service time of the batteries is prolonged, the continuous decay of the battery capacity causes continuous shortening of driving mileage, and how to supplement electrolyte to the ion batteries to restore the performance and prolong the service life of the ion batteries plays a key role in sustainable development of the new energy vehicles and continuous reduction of the battery cost.
Most of the existing ion batteries adopt a metal hard shell (such as stainless steel or aluminum alloy) and adopt a cylindrical or square cylindrical shape, and the problem of electrolyte replenishment in the later stage of use is not considered in design. If fluid infusion is needed, the metal hard shell needs to be drilled, and the drilling operation not only increases the process difficulty, but also generates a large amount of metal powder scraps while drilling, and is easy to cause irreparable loss on the safety of the battery.
Aiming at the field of ion battery manufacturing, in order to solve the existing electrolyte replenishing problem, the embodiment of the application provides a battery assembly and a battery comprising the battery assembly. Referring to fig. 1 to 6, the embodiment is understood, fig. 1 is a schematic cross-sectional view of a battery assembly provided in an embodiment of the present application, fig. 2 is an exploded view of a battery assembly provided in an embodiment of the present application, fig. 3 is another schematic cross-sectional view of a battery assembly provided in an embodiment of the present application, fig. 4 is another schematic cross-sectional view of a battery assembly provided in an embodiment of the present application, fig. 5 is another schematic cross-sectional view of a battery assembly provided in an embodiment of the present application, and fig. 6 is a schematic cross-sectional view of a battery provided in an embodiment of the present application.
The battery assembly provided in this embodiment is a part of an ion battery (such as a lithium ion battery, a sodium ion battery, etc.), as shown in fig. 1 to 5, and includes: the battery comprises a pole column 101, a through hole 105 penetrating the pole column 101 along the radial direction of the battery, a shell 103 and sealing pieces, wherein the pole column 101 and the shell 103 are in sealed connection, a multistage step is arranged in the through hole 105, the sealing pieces are arranged at one stage of the multistage steps and are in sealed connection with the pole column 101, namely, any stage of the multistage steps can correspond to one sealing piece, so that the battery can be sealed for multiple times in the process of filling or supplementing liquid to the battery through the through hole 105, for example, as shown in fig. 1, a first step 108 and a second step 110 are arranged on the through hole 105 at positions facing the outer side of a battery core, and in the production and assembly stage of the battery, after the battery is filled with liquid, a first sealing piece 109 is arranged on the first step 108, and the first sealing piece 109 and the pole column 101 are sealed in a welding way to form the battery; in the battery electrolyte replenishing stage, the first sealing member 109 is broken and electrolyte is replenished into the battery, and the second sealing member 111 is placed on the second step 110, and the second sealing member 111 is welded and sealed with the pole 101, so that electrolyte replenishment of the battery is completed. It should be noted that, in fig. 1, the first seal 109 and the second seal 111 are labeled at the same time, which is intended to facilitate understanding of the role of the multi-stage steps in the cell fluid-supplying stage, and in an actual cell structure, only one seal (for example, the first seal 109 or the second seal 111) exists in the same stage.
The housing 103 may be a cylindrical housing (for example, a cylindrical housing), or may be a battery cover (as shown in fig. 3), and the housing 103 may be provided as a positive electrode or a negative electrode of the battery cell, or may be provided as a neutral electrode (that is, the housing 103 is neither a positive electrode nor a negative electrode of the battery cell), so that only the battery is assembled and the battery cell is protected. The above-mentioned pole 101 may be a positive pole or a negative pole, and in this embodiment, the pole 101 is preferably a positive pole, and the housing 103 may be a negative pole of the battery in view of the safety of the battery production and the suitability for the existing production process.
As shown in fig. 1, an electrical connection part 107 is further provided in the middle of the through hole 105, and the electrical connection part 107 is used to electrically connect the pole 101 and the internal components of the battery.
In the present embodiment, the post 101 is located at the center position of the battery end face, and the through hole 105 is located at the center position of the post 101, so that battery injection is achieved. The central position of the bottom of the pole 101 may be set as a protrusion 120 (as shown in fig. 1, 2 and 3) or a flush arrangement (as shown in fig. 4), in this embodiment, the protrusion 120 is preferably disposed at the central position of the bottom of the pole 101, and the peripheral dimension of the protrusion 120 is gradually reduced along the direction of the internal component of the cell, so that the protrusion 120 of the pole 101 directly opens into the cell and is matched with the internal component of the cell by this arrangement. For example, by locating the terminal 101 at the center position of the battery end face, locating the through hole 105 at the center position of the terminal 101, and locating the protrusion 120 at the center position of the bottom of the terminal 101, the positions of the protrusion 120 and the reel (central axis) inside the battery cell are matched, and since the outer peripheral dimension of the protrusion 120 is gradually reduced along the direction of the component inside the battery cell, accurate positioning between the protrusion 120 of the terminal 101 and the reel inside the battery cell can be achieved, so that the battery cell can be assembled.
The battery assembly further includes an insulating sealing member 102 located between the housing 103 and the pole 101 for sealing between the housing 103 and the pole 101 and insulating between the housing 103 and the pole 101. In the present embodiment, the outer side wall of the pole 101 is provided with a concave structure, and the housing 103 is connected with the pole 101 in an insulating and sealing manner in the concave structure. As shown in fig. 1, the outer side wall of the post 101 is formed into a concave structure by the turnover 121 provided by the outer side wall of the post 101, the insulating seal member 102 is provided between the case 103 and the concave structure, has a certain corrosion resistance and water resistance, and satisfies a predetermined compression ratio (for example, the insulating seal member 102 may be a polymer having a certain elasticity, which may be provided as a single part or a plurality of parts), the case 103 may be fixedly sealed into the concave structure by providing the insulating seal member 102 between the case 103 and the concave structure, for example, when the post 101 is a positive post, the case 103 serves as a negative electrode, and by the insulating seal member 102, a tight seal between the positive post and the case 103 may be achieved while insulation between the positive and negative electrodes is achieved.
The battery assembly further includes an insulating member 104 extending in synchronization with the housing 103 for insulating the terminal 101 from the cell internal assembly to prevent short circuits inside the battery. The insulating member 104 may also be disposed flush with the bottom end of the concave structure (e.g., the turnover part 121 in fig. 1), or disposed below the turnover part 121, as shown in fig. 1, and in this embodiment, the insulating member 104 is preferably disposed in the following manner: the insulating member 104 is compression-fixed by the concave structure of the outer side wall of the pole 101, in which case the insulating member 104 is connected with the insulating sealing member 102.
As shown in fig. 1, the battery assembly further includes a sealing plug 106 disposed in the through hole 105 and located at the lower portion of the sealing member, where the sealing plug 106 may be a rubber plug or a metal plug, and is used for temporarily sealing the battery after the liquid is injected through the liquid injection hole, for example, when the battery is formed by opening, after the liquid is injected into the battery, the through hole 105 is temporarily sealed by the sealing plug 106, after the formation is completed, the sealing plug 106 is pulled out, so as to exhaust gas inside the battery, and the sealing plug 106 is placed in the through hole 105 again, or the sealing plug 106 is removed, and the first sealing member 109 is directly placed (as shown in fig. 5), so as to realize secondary sealing of the battery after the sealing welding.
The battery assembly provided by the embodiment comprises a pole column 101, a through hole 105 penetrating the pole column 101 along the radial direction of the battery, a shell 103 and a sealing element, wherein the pole column 101 is in sealing connection with the shell 103, a multi-stage step is arranged in the through hole 105, the sealing element is arranged at one stage of the multi-stage steps and is in sealing connection with the pole column 101, the multi-stage step is arranged in the through hole 105, the sealing element is arranged at one stage of the multi-stage steps and is in sealing connection with the pole column 101, and the battery can be sealed for multiple times after the battery is filled or supplemented with liquid through the through hole 105, for example, in the production and assembly stage of the battery, after the battery is filled with liquid, a first sealing element 109 is arranged on a first stage 108, and the battery is formed after the first sealing element 109 and the pole column 101 are welded and sealed; in the battery electrolyte replenishing stage, the first sealing member 109 is broken and electrolyte is replenished into the battery, and the second sealing member 111 is placed on the second step 110, and the second sealing member 111 is welded and sealed with the pole 101, so that electrolyte replenishment of the battery is completed.
In another embodiment of the present application, as shown in fig. 6, the battery includes a battery assembly 601, a positive current collecting assembly 602, a winding core assembly 603, a central shaft 604, a negative current collecting assembly 605 and a negative cover 606, which are provided in the above embodiments, and the related technical contents of the battery assembly 601 are referred to the above embodiments and are not repeated herein.
It should be noted that while the above describes exemplifying embodiments of the utility model, there are several different embodiments of the utility model, which are intended to be illustrative, and that the scope of the utility model is defined by the appended claims.
Claims (10)
1. A battery assembly, the battery assembly comprising: the battery comprises a pole, a through hole penetrating through the pole in the radial direction of the battery, a shell and a sealing piece, wherein the pole is in sealing connection with the shell, a plurality of steps are arranged in the through hole, and the sealing piece is arranged at one step of the plurality of steps and is in sealing connection with the pole.
2. The battery assembly of claim 1, wherein the post is located at a center position of the battery end face and the through hole is located at a center position of the post.
3. The battery assembly of claim 1, wherein the post is a positive post.
4. The battery assembly of claim 1, wherein the battery assembly further comprises: and the insulating sealing member is positioned between the shell and the pole and used for sealing the shell and the pole and insulating the shell and the pole.
5. The battery assembly of claim 4, wherein the outer sidewall of the post is a concave structure, and the insulating sealing member is disposed in the concave structure for sealing and securing the housing into the concave structure.
6. The battery assembly of claim 4, further comprising: and the insulating component extends synchronously with the shell and is used for insulating the pole post from the internal components of the battery core.
7. The battery assembly of any one of claims 1-6, wherein the battery assembly further comprises: and the sealing plug is arranged in the through hole and positioned at the lower part of the sealing piece.
8. The battery module according to any one of claims 1 to 6, wherein the terminal post includes a protruding portion provided at a bottom center position thereof, and a peripheral dimension of the protruding portion is gradually reduced in a cell internal module direction.
9. The battery pack of claim 1, wherein the through hole has an electrical connection portion at a middle portion thereof for connection with the internal components of the battery cell.
10. A battery comprising the battery assembly of any one of claims 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322309454.4U CN220652304U (en) | 2023-08-25 | 2023-08-25 | Battery assembly and battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322309454.4U CN220652304U (en) | 2023-08-25 | 2023-08-25 | Battery assembly and battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220652304U true CN220652304U (en) | 2024-03-22 |
Family
ID=90288498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322309454.4U Active CN220652304U (en) | 2023-08-25 | 2023-08-25 | Battery assembly and battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220652304U (en) |
-
2023
- 2023-08-25 CN CN202322309454.4U patent/CN220652304U/en active Active
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