Roll core supporting structure, roll core structure and power battery
By using support columns and isolation film layers in the core support structure, the core group structure stability and electrolyte flow problems are solved, effective reflow of the electrolyte and core positioning are achieved, and the reliability of the power battery is improved.
Patent Information
- Application Number
- CN202420392909.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-29
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-02-28
AI Technical Summary
There is a lack of effective solutions in the prior art to improve the structural stability of the core set in cylindrical bamboo and rattan batteries and the liquid absorption and reflux problems of the electrolyte, especially in the axial positioning between the cores and the electrolyte flow.
A core support structure is designed, including a support column and a first isolation film layer on the outside. The support column may be a support tube, and a second isolation film layer and a through hole may be provided on the inside for free flowing and sucking of the electrolyte. The liquid is refluxed, and the support column can be inserted into the center hole of the core or located between the cores to ensure effective flow and reflux of the electrolyte.
Through the action of the first isolation film layer, the electrolyte is absorbed and flowed back when the liquid level decreases, so as to soak the outer core, improving the reliability of the power battery and the positioning stability of the core, ensuring sufficient flow and absorption of the electrolyte.
Smart Images
Figure CN222168620U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of batteries, and in particular to a winding core support structure, a winding core structure and a power battery. Background Art
[0002] At present, in order to improve the energy density of the battery, Chuangming Company has proposed the concept of a cylindrical bamboo and rattan battery, in which at least two cores are connected end to end through a current collecting structure to form a linearly or nonlinearly arranged core group. The core group arranged in this way puts forward new requirements for structural stability, such as the axial positioning between the linearly arranged cores. Moreover, for the core group arranged in this way, new requirements are put forward for the absorption and reflux of the electrolyte, but there is no special solution in the existing technology. Utility Model Content
[0003] The purpose of the utility model is to provide a winding core support structure, a winding core structure and a power battery.
[0004] In order to achieve the above-mentioned purpose, the utility model provides a core support structure for inserting the central hole of at least one core, the core support structure comprising a support column and a first isolation film layer arranged on the outside of the support column, the first isolation film layer being used to absorb liquid backflow to infiltrate the core outside thereof.
[0005] Optionally, the support column is a support tube.
[0006] Optionally, a second isolation film layer is provided on the inner side of the support tube.
[0007] Optionally, the support tube is provided with a plurality of through holes penetrating inside and outside, the through holes are used to allow the electrolyte to flow freely, and the electrolyte can flow through the through holes between the first isolation film layer and the second isolation film layer respectively covering the outside and inside of the through holes.
[0008] Optionally, the winding core support structure is configured to be inserted into the central holes of at least two of the winding cores.
[0009] Optionally, the support column is a support tube, and the support tube is provided with a plurality of through holes at a position between adjacent winding cores, and the through holes are used to allow the electrolyte to flow freely.
[0010] Optionally, a second isolation film layer is provided on the inner side of the support tube.
[0011] In order to achieve the above-mentioned purpose, the utility model further provides a winding core structure, comprising at least one winding core and the winding core supporting structure as mentioned above, wherein the winding core supporting structure is inserted into the central hole of the winding core.
[0012] In order to achieve the above-mentioned purpose, the utility model also provides a winding core structure, comprising at least two winding cores and the winding core support structure as mentioned above, wherein the winding core support structure is inserted into the central hole of at least part of the winding core of the winding core structure.
[0013] In order to achieve the above-mentioned purpose, the utility model also provides a power battery, including the winding core structure as described above.
[0014] In the embodiment of the utility model, since a first isolation film layer for absorbing liquid and reflux is provided on the support column of the core support structure, when the core with the core support structure inserted is used in a power battery, when the liquid level of the electrolyte is lowered, under the action of the first isolation film layer, the electrolyte will be absorbed and refluxed to infiltrate the outer core, thereby facilitating the reliable operation of the power battery. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a schematic cross-sectional structure diagram of the winding core support structure of the first embodiment of the utility model. In this embodiment, the through holes are continuously arranged along the support tube.
[0016] Figure 2 It is a three-dimensional structural schematic diagram of the support column of the first embodiment of the utility model.
[0017] Figure 3 It is a schematic diagram of the three-dimensional structure of the winding core support structure of the second embodiment of the utility model. In this embodiment, the through hole is arranged at the position where the supporting tube is located between adjacent winding cores.
[0018] Figure 4 It is a three-dimensional structural schematic diagram of a support column according to the second embodiment of the utility model.
[0019] Figure 5 It is a schematic cross-sectional structure diagram of the winding core support structure of the third embodiment of the utility model. Compared with the first embodiment, an isolation film layer is provided on the inner side of the support tube.
[0020] Figure 6 It is a schematic cross-sectional structure diagram of the winding core support structure of the fourth embodiment of the utility model. Compared with the second embodiment, an isolation film layer is provided on the inner side of the support tube.
[0021] Figure 7 It is a three-dimensional structural schematic diagram of the winding core structure of an embodiment of the utility model.
[0022] Figure 8 It is a schematic cross-sectional structure diagram of the winding core structure of an embodiment of the utility model.
[0023] Fig. 9 It is a three-dimensional structural schematic diagram of the current collecting member of the embodiment of the utility model.
[0024] Fig.10A schematic diagram of the exploded structure of some components of a power battery according to an embodiment of the utility model. DETAILED DESCRIPTION
[0025] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0026] See also Figures 1 to 10 The embodiment of the utility model discloses a core support structure for inserting a central hole 11 of at least one core 1. The core support structure includes a support column 2 and a first isolation film layer 4 arranged on the outside of the support column 2. The first isolation film layer 4 is used for absorbing liquid and reflux (backsucking) to infiltrate the core 1 outside thereof.
[0027] Since a first isolation film layer 4 for absorbing liquid and reflux is provided on the support column 2 of the core support structure, when the core 1 with the core support structure inserted is used in a power battery, when the liquid level of the electrolyte is lowered, under the action of the first isolation film layer 4, the electrolyte will be absorbed and refluxed to infiltrate the outer core 1, thereby facilitating the reliable operation of the power battery.
[0028] In some embodiments, the first isolation film layer 4 is disposed on the support column 2 by winding, and may be wound at least once. Of course, the first isolation film layer 4 is not limited to being disposed on the support column 2 by winding.
[0029] The material of the first isolation film layer 4 is not limited, and it can be made of materials commonly used in the industry, such as PP, PE, etc., as long as it can play a role in absorbing and refluxing liquid.
[0030] In some embodiments, the support column 2 is a support tube 2. Of course, the support column 2 is not limited to a tubular form.
[0031] Specifically, the support tube 2 can be made of stainless steel, but is not limited thereto.
[0032] See also Figure 5 and Figure 6 Specifically, a second isolation film layer 5 for absorbing and refluxing liquid is provided on the inner side of the support tube 2. The material of the second isolation film layer 5 is not limited, and it can be made of materials used in the industry, such as PP, PE, etc., as long as it can play the role of absorbing and refluxing liquid.
[0033] Specifically, the support tube 2 is provided with a plurality of through holes 21 (preferably micropores) penetrating inside and outside, and the through holes 21 are used to allow the electrolyte to flow freely, and the electrolyte can flow between the first isolation film layer 4 and the second isolation film layer 5 respectively covering the outside and inside of the through holes 21 through the through holes 21. By providing a plurality of through holes 21 on the support tube 2, during the subsequent battery injection (for example, injection through the injection hole directly opposite to the central hole 11 of the winding core 1), the through holes 21 allow the electrolyte to flow freely, which is conducive to rapid and sufficient injection. At the same time, since the electrolyte can flow between the first isolation film layer 4 and the second isolation film layer 5 respectively covering the outside and inside of the through holes 21 through the through holes 21, it is more conducive to the absorption and reflux of the electrolyte.
[0034] exist Figure 1 and Figure 5 In the specific example shown, the through holes 21 are continuously distributed along the extension direction of the support tube 2, that is, the through holes 21 are continuously arranged from one end to the other end of the support tube 2, but this is certainly not limited to this. Figure 2 and Figure 6 In the specific example shown, the through hole 21 is only provided in a certain area of the support tube 2 .
[0035] In each example shown in the drawings, the through holes 21 are evenly distributed along the circumference of the support tube 2 , but the present invention is not limited thereto.
[0036] In short, the present invention does not limit the location of the through hole 21 , as long as it can play a role in allowing the electrolyte to flow freely.
[0037] In addition, the specific shape of the through hole 21 is not limited.
[0038] In some embodiments, the core support structure is configured to be inserted in the center holes 11 of at least two cores 1. When the core support structure is inserted in the center holes 11 of at least two cores 1, when the electrolyte level is low, the isolation film layer will cause the electrolyte to flow back upward, which is beneficial for each core 1 to maintain a good state. In addition, since the core support structure is inserted in the center holes 11 of at least two cores 1, it is beneficial for the positioning of each core 1. For example, when each core 1 is arranged in a straight line, the support column 2 extends in a straight line. By setting the core support structure, it is beneficial for the axis positioning of each core 1. Of course, the cores 1 are not limited to a straight line arrangement, but can also be non-straight line arrangement. For example, the first and second of the three cores 1 are arranged in a straight line, and the third is inclined at a certain angle relative to the second. At this time, the extension direction of the support column 2 can adapt to the arrangement direction of the core 1, and then when the core support structure is inserted in each core 1, it is beneficial for the positioning of each core 1.
[0039] Specifically, the support column 2 is a support tube 2, and the support tube 2 is provided with a plurality of through holes 21 at a position 22 between adjacent winding cores 1, and the through holes 21 are used to allow the electrolyte to flow freely. Since the support tube 2 is provided with a plurality of through holes 21 at a position 22 between adjacent winding cores 1, when the battery is filled with electrolyte, the electrolyte can be transported to the end of the winding core 1 in a relatively concentrated manner, which makes it easier to promote the seepage from the end of the winding core 1.
[0040] See also Figure 5 and Figure 6 More specifically, a second isolation film layer 5 for liquid absorption and reflux is provided on the inner side of the support tube 2. Since the electrolyte can flow between the first isolation film layer 4 and the second isolation film layer 5 respectively covering the outer side and the inner side of the through hole 21 through the through hole 21, it is more conducive to the absorption and reflux of the electrolyte.
[0041] See also Figures 1 to 9 The embodiment of the utility model further discloses a core structure, comprising at least one core 1 and the core support structure as described above, wherein the core support structure is inserted into the central hole 11 of the core 1. Here, "the core support structure is inserted into the central hole 11 of the core 1" may be inserted into the central holes 11 of all the cores 1 of the core structure, or may be inserted into the central holes 11 of some of the cores 1 (when the core structure has at least two cores 1).
[0042] Since a first isolation film layer 4 for absorbing liquid and reflux is provided on the support column 2 of the core support structure, when the core 1 with the core support structure inserted is used in a power battery, when the liquid level of the electrolyte is lowered, under the action of the first isolation film layer 4, the electrolyte will be absorbed and refluxed to infiltrate the outer core 1, thereby facilitating the reliable operation of the power battery.
[0043] When the core support structure is inserted into the central holes 11 of at least two cores 1 , when the electrolyte level is low, the isolation film layer will cause the electrolyte to flow back upward, which is beneficial for each core 1 to maintain a good condition and is also beneficial for positioning the core 1 .
[0044] In some embodiments, when the core 1 structure has at least two cores 1, the ends of each core 1 form full pole ears, and the full pole ears of adjacent cores 1 are arranged at intervals and connected by current collectors 6. The current collector 6 can be a single-body structure or can be composed of at least two structural members, which is not limited here. In a specific example, the current collector 6 is bent into a U shape by a sheet, and a through hole 61 corresponding to the center hole 11 of the core 1 and for the core support structure to pass through is formed thereon.
[0045] Please combine Figures 1 to 10 The utility model also discloses a power battery, including the winding core structure as described above.
[0046] In some embodiments, the core structure includes at least two cores 1, and each core 1 is arranged linearly. The power battery also includes a shell 7 sleeved on the outside of each core 1, and the open end of the shell 7 is equipped with a top cover (not shown). The top cover may be provided with a liquid injection hole, and the liquid injection hole may be directly opposite to the central hole 11 of the core 1.
[0047] The above disclosure is only a preferred example of the present invention, and its role is to facilitate the technical personnel in this field to understand and implement it. Of course, it cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.
Claims
1. A winding core support structure for inserting into the central hole of at least one winding core, characterized in that: The winding core support structure comprises a supporting column and a first isolation film layer arranged outside the supporting column, wherein the first isolation film layer is used for absorbing liquid and flowing back to infiltrate the winding core outside the first isolation film layer.
2. The winding core support structure according to claim 1, characterized in that: The support column is a support tube.
3. The winding core support structure according to claim 2, characterized in that: A second isolation film layer is arranged on the inner side of the support tube.
4. The winding core support structure according to claim 3, characterized in that: The support tube is provided with a plurality of through holes penetrating inside and outside, and the through holes are used to allow the electrolyte to flow freely. The electrolyte can flow through the through holes between the first isolation film layer and the second isolation film layer respectively covering the outside and inside of the through holes.
5. The winding core support structure according to claim 1, characterized in that: The winding core supporting structure is configured to be inserted into the central holes of at least two of the winding cores.
6. The winding core support structure according to claim 5, characterized in that: The support column is a support tube, and a plurality of through holes are provided at a position of the support tube between adjacent winding cores, and the through holes are used to allow the electrolyte to flow freely.
7. The winding core support structure according to claim 6, characterized in that: A second isolation film layer is arranged on the inner side of the support tube.
8. A winding core structure, characterized in that: The invention comprises at least one winding core and the winding core supporting structure according to any one of claims 1 to 4, wherein the winding core supporting structure is inserted into the central hole of the winding core.
9. A winding core structure, characterized in that: The invention comprises at least two winding cores and a winding core supporting structure as claimed in any one of claims 5 to 7, wherein the winding core supporting structure is inserted into a central hole of at least a part of the winding cores of the winding core structure.
10. A power battery, characterized in that: Comprising the winding core structure as claimed in claim 8 or 9.