Laminated structure of battery
By separately processing the cathode and anode laminate sets and using insulating tape to support them, the problem of uneven distribution of electrode materials in traditional batteries is solved, and the stability of the battery and the charging and discharging efficiency are improved. It is suitable for battery laminate structures of lithium batteries.
Patent Information
- Application Number
- CN202421609747.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-09
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-07-09
AI Technical Summary
In traditional battery manufacturing, cathode and anode materials are difficult to adapt simultaneously during continuous coating, drying and pressing, resulting in uneven distribution of electrode materials and poor performance.
The cathode lamination set and the anode lamination set are processed separately to form a stable and consistent lamination set, and mechanical support is provided by insulating tape to ensure the precise preparation of a single material for each electrode sheet.
It improves the uniformity of electrode material distribution, enhances the stability and consistency of the battery, improves the charge and discharge efficiency and cycle stability, and can assemble multiple stacks as needed to improve battery capacity.
Smart Images
Figure CN223140826U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of lithium batteries, and particularly relates to a battery laminated structure. Background Art
[0002] In traditional battery manufacturing processes, in order to improve battery production efficiency, the preparation of the cathode and the anode is often carried out continuously and synchronously on the electrode sheet. Therefore, on one side of most battery electrode sheets is the cathode material, and on the other side is the anode material. Since the materials of the cathode and the anode are different, during the continuous processes of coating, drying, and pressing of the electrode sheet, the process parameters (such as speed, temperature, etc.) are not easy to control and it is difficult to meet the requirements for both the cathode material and the anode material simultaneously, which will lead to the phenomena of aggregation and dispersion during the preparation of the electrode, that is, the electrode material distribution of traditional batteries is uneven and the performance is poor, which urgently needs to be solved. Summary of the Utility Model
[0003] In view of the above deficiencies in the prior art, the present application provides a battery laminated structure.
[0004] The above-mentioned inventive object of the present application is achieved through the following technical solutions:
[0005] A cathode laminated group, the cathode laminated group includes a plurality of first diaphragms stacked in sequence, and each of the first diaphragms is clamped with a cathode sheet;
[0006] An anode laminated group, the anode laminated group includes a plurality of second diaphragms stacked in sequence, and each of the second diaphragms is clamped with an anode sheet;
[0007] By adopting the above technical solution, in this battery laminated structure, the cathode sheets and the anode sheets are separately laminated to form a stable and consistent cathode laminated group and anode laminated group, so that each electrode sheet only needs to be precisely prepared with a single material according to the design requirements, which can improve the uniformity of the electrode material distribution on the electrode sheet, thereby improving the stability and consistency of the battery, and improving the charge and discharge efficiency and cycle stability of the battery.
[0008] In a preferred example of the present application, it can be further configured that: the battery laminated structure further includes a battery housing, the interior of the battery housing is filled with electrolyte and is provided with at least one cathode contact and at least one anode contact, the cathode laminated group is located inside the battery housing, and each cathode sheet is used to abut against and be electrically connected to the cathode contact, the anode laminated group is located inside the battery housing, and each anode sheet is used to abut against and be electrically connected to the anode contact.
[0009] By adopting the above technical solution, the cathode stack group abuts against the cathode contact through a plurality of cathode sheets, and the anode stack group abuts against the anode contact through a plurality of anode sheets, and cooperates with the electrolyte inside the battery case to complete power conduction.
[0010] In a preferred example of the present application, it can be further configured that: the cathode stack group is arranged directly above the anode stack group, the cathode contact and the anode contact are respectively arranged on opposite sides of the battery case, and each cathode sheet extends out from the opening side of the first separator and abuts against the cathode contact, and each anode sheet extends out from the opening side of the second separator and abuts against the anode contact.
[0011] In a preferred example of the present application, it can be further configured that: the cathode stack group is arranged on one side of the anode stack group, the cathode contact and the anode contact are respectively arranged on opposite sides of the battery case, and each cathode sheet extends out from the opening side of the first separator and abuts against the cathode contact, and each anode sheet extends out from the opening side of the second separator and abuts against the anode contact. A third separator is arranged between the cathode stack group and the anode stack group, and the third separator is used to isolate the cathode stack group and the anode stack group.
[0012] In a preferred example of the present application, it can be further configured that: the cathode stack group is arranged directly above the anode stack group, the cathode contact and the anode contact are both arranged on the same side of the battery case, and each cathode sheet extends out from the opening side of the first separator and abuts against the cathode contact, and each anode sheet extends out from the opening side of the second separator and abuts against the anode contact.
[0013] In a preferred example of the present application, it can be further configured that: the cathode stack group is arranged on one side of the anode stack group, the cathode contact and the anode contact are both arranged on the same side of the battery case, and each cathode sheet extends out from the opening side of the first separator and abuts against the cathode contact, and each anode sheet extends out from the opening side of the second separator and abuts against the anode contact. A third separator is arranged between the cathode stack group and the anode stack group, and the third separator is used to isolate the cathode stack group and the anode stack group.
[0014] In a preferred example of the present application, it can be further configured that: the cathode stack group is arranged directly above the anode stack group, the cathode contact and the anode contact are respectively arranged on adjacent sides of the battery case, and each cathode sheet extends out from the opening side of the first separator and abuts against the cathode contact, and each anode sheet extends out from the opening side of the second separator and abuts against the anode contact.
[0015] In a preferred example, the present application can be further configured as follows: there are two sets of the cathode stack group and the anode stack group respectively, and there are two cathode contacts and two anode contacts respectively. The two cathode contacts are respectively arranged on the opposite sides of the battery housing, and the two anode contacts are both arranged on the same side of the battery housing. The two cathode stack groups are both located between the two anode stack groups. All the cathode sheets of one of the cathode stack groups extend from the corresponding first diaphragm opening side and abut against one of the cathode contacts, and all the cathode sheets of the other cathode stack group extend from the corresponding first diaphragm opening side and abut against the other cathode contact. All the anode sheets of one of the anode stack groups extend from the corresponding second diaphragm opening side and abut against one of the anode contacts, and all the anode sheets of the other anode stack group extend from the corresponding second diaphragm opening side and abut against the other anode contact.
[0016] By adopting the above technical solution, multiple sets of cathode stack groups and anode stack groups can be provided, and multiple corresponding cathode contacts and anode contacts can also be provided. Workers can stack and assemble them in sequence according to the required number of battery layers to form a single battery unit, thereby increasing the capacity of the battery.
[0017] In a preferred example, the present application can be further configured as follows: insulating tapes are clamped between several of the first diaphragms and between several of the second diaphragms.
[0018] By adopting the above technical solution, by providing the insulating tapes, stable mechanical support can be provided between several diaphragms and the cathode and anode sheets, avoiding looseness inside the cathode stack group or the anode stack group.
[0019] In summary, the present application includes at least one of the following beneficial technical effects:
[0020] 1. For the laminated structure of the battery, the cathode sheets and the anode sheets are separately laminated to form stable and consistent cathode stack groups and anode stack groups, so that each electrode sheet only needs to be precisely prepared with a single material according to the design requirements, which can improve the uniformity of the distribution of the electrode material on the electrode sheet, thereby improving the stability and consistency of the battery, and enhancing the charge and discharge efficiency and cycle stability of the battery.
[0021] 2. By providing the insulating tapes, stable mechanical support can be provided between several diaphragms and the cathode and anode sheets, avoiding looseness inside the cathode stack group or the anode stack group.
[0022] 3. Multiple sets of cathode stack groups and anode stack groups can be provided, and multiple corresponding cathode contacts and anode contacts can also be provided. Workers can stack and assemble them in sequence according to the required number of battery layers to form a single battery unit, thereby increasing the capacity of the battery. Brief Description of the Drawings
[0023] Figure 1 is a schematic structural view of a battery laminated structure in an embodiment of the present application;
[0024] Figure 2 is a schematic cross-sectional view of a battery laminated structure in an embodiment of the present application;
[0025] Figure 3 is an assembly schematic of a cathode laminate group and an anode laminate group in Embodiment 2 of the present application Figure 1 ;
[0026] Figure 4 is an assembly schematic of a cathode laminate group and an anode laminate group in Embodiment 2 of the present application Figure 2 ;
[0027] Figure 5 is an assembly schematic of a cathode laminate group and an anode laminate group in Embodiment 3 of the present application Figure 1 ;
[0028] Figure 6 is an assembly schematic of a cathode laminate group and an anode laminate group in Embodiment 3 of the present application Figure 2 ;
[0029] Figure 7 is an assembly schematic of a cathode laminate group and an anode laminate group in Embodiment 4 of the present application Figure 1 ;
[0030] Figure 8 is an assembly schematic of a cathode laminate group and an anode laminate group in Embodiment 4 of the present application Figure 2 ;
[0031] Figure 9 is an assembly schematic of a cathode laminate group and an anode laminate group in Embodiment 5 of the present application Figure 1 ;
[0032] Figure 10 is an assembly schematic of a cathode laminate group and an anode laminate group in Embodiment 5 of the present application Figure 2 ;
[0033] Figure 11 is an assembly schematic of a cathode laminate group and an anode laminate group in Embodiment 6 of the present application Figure 1 ;
[0034] Figure 12 is an assembly schematic of a cathode laminate group and an anode laminate group in Embodiment 6 of the present application Figure 2 ;
[0035] Figure 13 is an assembly schematic of a cathode laminate group and an anode laminate group in Embodiment 7 of the present application Figure 1 ;
[0036] Figure 14 It is a schematic diagram of the assembly of the cathode stack and the anode stack in Embodiment 7 of the present application. Figure 2 。
[0037] Reference numerals: 1, cathode stack; 11, first separator; 12, cathode sheet; 2, anode stack; 21, second separator; 22, anode sheet; 3, battery housing; 4, cathode contact; 5, anode contact; 6, third separator; 7, insulating tape. Detailed implementation manners
[0038] The following describes exemplary embodiments of the present application with reference to the accompanying drawings. Various details of the embodiments of the present application are included to assist in understanding, and they should be considered merely exemplary. Therefore, those of ordinary skill in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present application. Similarly, for the sake of clarity and conciseness, descriptions of well-known functions and structures are omitted in the following description.
[0039] It should be noted that the terms "first", "second", etc. in the present utility model are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present disclosure described herein can be implemented in an order other than those illustrated or described herein. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present disclosure.
[0040] In addition, the term "and / or" herein merely describes the associated relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after, unless otherwise specified.
[0041] Next, a battery laminated structure of the present application will be described with reference to the accompanying drawings.
[0042] As Figure 1 and Figure 2As shown in the figure, the battery stack structure includes a cathode stack group 1 and an anode stack group 2. The cathode stack group 1 includes a number of first diaphragms 11 stacked in sequence, and each first diaphragm 11 is clamped with a cathode sheet 12. The anode stack group 2 includes a number of second diaphragms 21 stacked in sequence, and each second diaphragm 21 is clamped with an anode sheet 22. By separating the cathode sheets 12 and anode sheets 22 for lamination processing, a stable and consistent cathode stack group 1 and anode stack group 2 are formed, so that each electrode sheet only needs to be precisely prepared with a single material according to the design requirements, which can improve the uniformity of the electrode material distribution on the electrode sheet, thereby improving the stability and consistency of the battery, and improving the charge and discharge efficiency and cycle stability of the battery.
[0043] It should be noted that in this embodiment, both the cathode sheet 12 and the anode sheet 22 are made by coating or spreading a suitable single active material onto a conductive current collector. The difference between the cathode sheet 12 and the anode sheet 22 lies in the different active materials and conductive current collectors selected. The first diaphragm 11 and the second diaphragm 21 usually adopt materials such as polymer membranes, nanoporous diaphragms or glass fiber diaphragms that have good ion conduction performance and can effectively isolate the positive and negative electrodes to prevent short-circuiting. This is common knowledge for those skilled in the art and will not be elaborated here.
[0044] Specifically, the battery stack structure further includes a battery housing 3. The battery housing 3 contains an electrolyte (not shown in the figure) and is provided with at least one cathode contact 4 and at least one anode contact 5. The cathode stack group 1 is located inside the battery housing 3, and each cathode sheet 12 is used to abut and electrically connect to the cathode contact 4. The anode stack group 2 is located inside the battery housing 3, and each anode sheet 22 is used to abut and electrically connect to the anode contact 5. The cathode stack group 1 abuts the cathode contact 4 through a number of cathode sheets 12, and the anode stack group 2 abuts the anode contact 5 through a number of anode sheets 22, and cooperates with the electrolyte inside the battery housing 3 to complete power conduction. Among them, after the first diaphragm 11 and the second diaphragm 21 are completed with isolation packaging, they are placed in a liquid injection device. At this time, under the action of common liquid injection of the cathode stack group 1 and the anode stack group 2, it can ensure that the electrolyte penetrates into each cathode sheet 12 and each anode sheet 22 separately and evenly, further improving the charge and discharge efficiency and cycle stability of the battery.
[0045] It should also be noted that multiple groups of the cathode stack group 1 and the anode stack group 2 can be correspondingly set. Workers can stack and assemble them in sequence according to the required number of battery layers to form a single battery unit, improving the battery capacity.
[0046] Specifically, as Figure 3 and Figure 4As shown, in one embodiment (designated as Embodiment 2), the cathode stack 1 is arranged directly above the anode stack 2. The cathode contact 4 and the anode contact 5 are respectively arranged on opposite sides of the battery housing 3. Each cathode sheet 12 extends from the opening side of the first separator 11 and abuts against the cathode contact 4. Each anode sheet 22 extends from the opening side of the second separator 21 and abuts against the anode contact 5.
[0047] As Figure 5 and Figure 6 As shown, in one embodiment (designated as Embodiment 3), the cathode stack 1 is arranged on one side of the anode stack 2, that is, the cathode stack 1 and the anode stack 2 are on the same horizontal plane. The cathode contact 4 and the anode contact 5 are respectively arranged on opposite sides of the battery housing 3. Each cathode sheet 12 extends from the opening side of the first separator 11 and abuts against the cathode contact 4. Each anode sheet 22 extends from the opening side of the second separator 21 and abuts against the anode contact 5. A third separator 6 is arranged between the cathode stack 1 and the anode stack 2. The third separator 6 is used to separate the cathode stack 1 and the anode stack 2. It should be noted that since the first separator 11 cooperates with the cathode sheet 12 in a folded and clamped manner, and the second separator 21 is the same as the anode sheet 22, both opposite sides of the first separator 11 and both opposite sides of the second separator 21 are opening sides. When the cathode stack 1 and the anode stack 2 are on the same horizontal plane, the third separator 6 can prevent the cathode sheet 12 and the anode sheet 22 from touching each other by mistake and causing a short circuit.
[0048] As Figure 7 and Figure 8 As shown, in one embodiment (designated as Embodiment 4), the cathode stack 1 is arranged directly above the anode stack 2. The cathode contact 4 and the anode contact 5 are both arranged on the same side of the battery housing 3. Each cathode sheet 12 extends from the opening side of the first separator 11 and abuts against the cathode contact 4. Each anode sheet 22 extends from the opening side of the second separator 21 and abuts against the anode contact 5.
[0049] As Figure 9 and Figure 10 As shown, in one embodiment (designated as Embodiment 5), the cathode stack 1 is arranged on one side of the anode stack 2. The cathode contact 4 and the anode contact 5 are both arranged on the same side of the battery housing 3. Each cathode sheet 12 extends from the opening side of the first separator 11 and abuts against the cathode contact 4. Each anode sheet 22 extends from the opening side of the second separator 21 and abuts against the anode contact 5. A third separator 6 is arranged between the cathode stack 1 and the anode stack 2. The third separator 6 is used to separate the cathode stack 1 and the anode stack 2. Among them, the function of the third separator 6 is the same as that of the third separator 6 in Embodiment 3.
[0050] As Figure 11 andFigure 12 As shown, in one embodiment (designated as Embodiment 6), the cathode stack 1 is disposed directly above the anode stack 2. The cathode contact 4 and the anode contact 5 are respectively arranged on adjacent sides of the battery housing 3. Each cathode sheet 12 extends from the opening side of the first separator 11 and abuts against the cathode contact 4. Each anode sheet 22 extends from the opening side of the second separator 21 and abuts against the anode contact 5.
[0051] As Figure 13 and Figure 14 shown, in one embodiment (designated as Embodiment 7), there are two sets of the cathode stack 1 and two sets of the anode stack 2. There are two cathode contacts 4 and two anode contacts 5. The two cathode contacts 4 are respectively arranged on opposite sides of the battery housing 3, and the two anode contacts 5 are arranged on the same side of the battery housing 3. The two cathode stacks 1 are both located between the two anode stacks 2. All the cathode sheets 12 of one cathode stack 1 extend from the opening side of the corresponding first separator 11 and abut against one cathode contact 4, and all the cathode sheets 12 of the other cathode stack 1 extend from the opening side of the corresponding first separator 11 and abut against the other cathode contact 4. All the anode sheets 22 of one anode stack 2 extend from the opening side of the corresponding second separator 21 and abut against one anode contact 5, and all the anode sheets 22 of the other anode stack 2 extend from the opening side of the corresponding second separator 21 and abut against the other anode contact 5.
[0052] In addition, insulating tapes 7 are interposed between several first separators 11 and between several second separators 21. By providing the insulating tapes 7, stable mechanical support can be provided between several separators and the anode and cathode sheets 22, avoiding looseness inside the cathode stack 1 or inside the anode stack 2.
[0053] The above specific embodiments do not constitute a limitation to the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub - combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present application shall be included within the protection scope of the present application.
Claims
1. A battery laminated structure, characterized in that, Comprising: A cathode stack (1), the cathode stack (1) comprising a plurality of first diaphragms (11) stacked in sequence, and a cathode sheet (12) being clamped between each of the first diaphragms (11); An anode stack (2), the anode stack (2) comprising a plurality of second diaphragms (21) stacked in sequence, and an anode sheet (22) being clamped between each of the second diaphragms (21).
2. The battery laminated structure according to claim 1, characterized in that, The battery stack structure further includes a battery housing (3), an electrolyte is contained inside the battery housing (3), and at least one cathode contact (4) and at least one anode contact (5) are provided. The cathode stack (1) is located inside the battery housing (3), and each cathode sheet (12) is adapted to abut against and be electrically connected to the cathode contact (4). The anode stack (2) is located inside the battery housing (3), and each anode sheet (22) is adapted to abut against and be electrically connected to the anode contact (5).
3. The battery laminated structure according to claim 2, wherein, The cathode stack (1) is disposed directly above the anode stack (2), the cathode contact (4) and the anode contact (5) are respectively disposed on opposite sides of the battery housing (3), each cathode sheet (12) extends out from the opening side of the first diaphragm (11) and abuts against the cathode contact (4), and each anode sheet (22) extends out from the opening side of the second diaphragm (21) and abuts against the anode contact (5).
4. A battery laminated structure according to claim 2, characterized in that, The cathode stack (1) is disposed on one side of the anode stack (2), the cathode contact (4) and the anode contact (5) are respectively disposed on opposite sides of the battery housing (3), each cathode sheet (12) extends out from the opening side of the first diaphragm (11) and abuts against the cathode contact (4), each anode sheet (22) extends out from the opening side of the second diaphragm (21) and abuts against the anode contact (5), and a third diaphragm (6) is provided between the cathode stack (1) and the anode stack (2), and the third diaphragm (6) is used to separate the cathode stack (1) and the anode stack (2).
5. A battery stack structure according to claim 2, characterized in that, The cathode stack (1) is disposed directly above the anode stack (2), the cathode contact (4) and the anode contact (5) are both disposed on the same side of the battery housing (3), each cathode sheet (12) extends out from the opening side of the first diaphragm (11) and abuts against the cathode contact (4), and each anode sheet (22) extends out from the opening side of the second diaphragm (21) and abuts against the anode contact (5).
6. The battery laminated structure according to claim 2, wherein The cathode stack (1) is disposed on one side of the anode stack (2). The cathode contact (4) and the anode contact (5) are both disposed on the same side of the battery housing (3). Each cathode sheet (12) extends from the open side of the first separator (11) and abuts against the cathode contact (4). Each anode sheet (22) extends from the open side of the second separator (21) and abuts against the anode contact (5). A third separator (6) is disposed between the cathode stack (1) and the anode stack (2), and the third separator (6) is used to isolate the cathode stack (1) and the anode stack (2).
7. The battery laminated structure according to claim 2, characterized in that, The cathode stack (1) is disposed directly above the anode stack (2). The cathode contact (4) and the anode contact (5) are respectively disposed on adjacent sides of the battery housing (3). Each cathode sheet (12) extends from the open side of the first separator (11) and abuts against the cathode contact (4). Each anode sheet (22) extends from the open side of the second separator (21) and abuts against the anode contact (5).
8. A battery laminated structure according to claim 2, characterized in that, There are two sets of the cathode stack (1) and the anode stack (2) respectively, and there are two cathode contacts (4) and two anode contacts (5). The two cathode contacts (4) are respectively disposed on opposite sides of the battery housing (3), and the two anode contacts (5) are both disposed on the same side of the battery housing (3). The two cathode stacks (1) are both located between the two anode stacks (2). All the cathode sheets (12) of one of the cathode stacks (1) extend from the open side of the corresponding first separator (11) and abut against one of the cathode contacts (4), and all the cathode sheets (12) of the other cathode stack (1) extend from the open side of the corresponding first separator (11) and abut against the other cathode contact (4). All the anode sheets (22) of one of the anode stacks (2) extend from the open side of the corresponding second separator (21) and abut against one of the anode contacts (5), and all the anode sheets (22) of the other anode stack (2) extend from the open side of the corresponding second separator (21) and abut against the other anode contact (5).
9. A battery laminate structure as claimed in claim 1, wherein, Insulating tapes (7) are interposed between several of the first separators (11) and between several of the second separators (21).