Cell stacking module and module-free battery system
By setting protective plates and foam at both ends of the cell stacking module, and combining thermally conductive adhesive coating on the tabs, cover plates and mica plates, the problem of cell damage in moduleless battery systems is solved, achieving cell protection and the safety and stability of the battery system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- FARASIS TECH (GANZHOU) CO LTD
- Filing Date
- 2025-03-21
- Publication Date
- 2026-04-17
AI Technical Summary
In moduleless battery systems, cells are easily damaged when clamped by tooling, leading to shell deformation, scratches, and even short circuits, posing safety hazards.
A first protection plate and a second protection plate are set at both ends of the cell stacking module, and foam is attached to them respectively to disperse the tooling pressure. The tabs, cover plates, mica plates, insulation layers and heat insulation layers are coated with thermally conductive adhesive to protect the cells.
It effectively reduces cell casing deformation and scratches, lowers the risk of electrode structure and separator damage, ensures cell integrity, and improves the safety and stability of the battery system.
Smart Images
Figure CN224138224U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of battery equipment, and in particular to a cell stacking module and a moduleless battery system. Background Technology
[0002] In related technologies, foam is typically placed at both ends of the battery cell stacking module to cushion the battery cells. The foam is soft and has a certain degree of elasticity, which theoretically can alleviate collisions and friction between battery cells and between battery cells and external structures to some extent.
[0003] Battery stacking modules without modules lack the protection of a module frame. When the stacking modules are clamped and placed into the box using tooling, the pressure applied by the tooling is significant. Under such clamping force, the soft foam cannot provide sufficient support and protection, causing the cells to directly bear most of the pressure from the tooling. This can easily lead to deformation and scratches on the cell casing, and in severe cases, damage to the internal electrode structure and separator of the cell, thereby affecting the cell's electrical performance and even causing safety hazards such as short circuits. Utility Model Content
[0004] The main purpose of this utility model is to provide a cell stacking module and a module-less battery system, which aims to solve the technical problem that the cells are easily damaged when the tooling clamps the cells in related technologies.
[0005] To achieve the aforementioned objectives, the first aspect of this utility model provides a cell stacking module for use in a module-less battery system, comprising:
[0006] A battery cell stack, wherein a first foam is provided at one end of the battery cell stack and a second foam is provided at the other end;
[0007] A first protective plate is disposed at one end of the battery cell stack, and the first protective plate is attached to the side of the first foam facing away from the battery cell stack; and
[0008] The second protection plate is disposed at the other end of the cell stack and is attached to the side of the second foam away from the cell stack.
[0009] In one embodiment, the positive electrode tab of the battery cell stack is coated with thermally conductive adhesive, and a first side plate is attached to the side near the positive electrode tab; and / or
[0010] The negative electrode tab of the battery cell stack is coated with thermally conductive adhesive, and a second side plate is attached to the side near the negative electrode tab.
[0011] In one embodiment, the cell stacking module includes a cover plate that covers the top of the cell stack.
[0012] In one embodiment, the cell stacking module includes a mica plate covering the side of the cover plate opposite to the cell stack.
[0013] In one embodiment, the cover plate has a first through hole, and the mica plate has a second through hole that communicates with the first through hole. The first through hole communicates with the mounting space of the battery cell stack, and the second through hole communicates with the outside.
[0014] In one embodiment, multiple first through holes and multiple second through holes are provided, with each of the multiple first through holes corresponding to one of the multiple second through holes.
[0015] In one embodiment, the cell stacking module further includes a first insulation layer disposed between the first protective plate and the first foam; and / or
[0016] The cell stacking module also includes a second insulation layer, which is disposed between the second protective plate and the second foam.
[0017] In one embodiment, the cell stacking module further includes a first heat insulation layer disposed between the first protective plate and the first foam; and / or
[0018] The cell stacking module also includes a second heat insulation layer, which is disposed between the second protective plate and the second foam.
[0019] The second aspect of this utility model provides a module-less battery system, including a housing and the aforementioned cell stacking module, wherein the cell stacking module is disposed within the housing.
[0020] In one embodiment, the moduleless battery system further includes fasteners, and the cover plate of the cell stacking module is provided with a mounting part, the mounting part is provided with a first mounting hole, the housing is provided with a second mounting hole adapted to the first mounting hole, and the fastener passes through the first mounting hole and the second mounting hole.
[0021] Beneficial effects:
[0022] This utility model discloses a cell stacking module for use in module-less battery systems. The module includes a cell stack body, a first protection plate, and a second protection plate. A first foam is provided at one end of the cell stack body, and a second foam is provided at the other end. The first protection plate is located at one end of the cell stack body, and is attached to the first foam, facing away from the side of the cell stack body. The second protection plate is located at the other end of the cell stack body, and is attached to the second foam, facing away from the side of the cell stack body. The first and second protection plates are respectively located at both ends of the cell stack body and are attached to the foam. When a clamping force is applied by the tooling, the first and second protection plates can withstand and disperse most of the tooling pressure. The first and second protection plates prevent the cells from directly bearing excessive pressure, thereby effectively reducing the occurrence of cell shell deformation and scratches, greatly reducing the risk of damage to the internal electrode structure and separator of the cell, ensuring the integrity of the cell, and reducing the probability of cell damage due to external forces. Attached Figure Description
[0023] Figure 1 This is an exploded view of a cell stacking module according to an embodiment of the present invention.
[0024] Figure 2 This is another exploded view of a cell stacking module according to an embodiment of the present invention.
[0025] Figure 3 This is a schematic diagram of the cover plate according to an embodiment of the present invention.
[0026] in:
[0027] 100. Cell stack; 110. First side plate; 120. Second side plate;
[0028] 200. First protection plate;
[0029] 300. Second protection plate;
[0030] 400. First foam;
[0031] 500, Second foam;
[0032] 600, Cover plate; 610, First through hole; 620, Mounting part; 621, First mounting hole;
[0033] 700, mica plate; 710, second through hole;
[0034] 810. First insulation layer; 820. Second insulation layer;
[0035] 910. First insulation layer; 920. Second insulation layer.
[0036] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0037] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.
[0038] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly and specifically defined.
[0039] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0040] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0041] like Figures 1 to 3As shown, in some embodiments, a cell stacking module is used in a module-less battery system. The cell stacking module includes a cell stack body 100, a first protection plate 200, and a second protection plate 300. A first foam 400 is disposed at one end of the cell stack body 100, and a second foam 500 is disposed at the other end. The first protection plate 200 is disposed at one end of the cell stack body 100, and the first protection plate 200 is attached to the first foam 400 away from the side of the cell stack body 100. The second protection plate 300 is disposed at the other end of the cell stack body 100, and the second protection plate 300 is attached to the second foam 500 away from the side of the cell stack body 100.
[0042] During operation, the first protective plate 200 and the second protective plate 300 are respectively positioned at both ends of the cell stack 100 and attached to foam. When the tooling applies clamping force, the first protective plate 200 and the second protective plate 300 can withstand and disperse most of the tooling pressure. The first protective plate 200 and the second protective plate 300 can prevent the cell from directly bearing excessive pressure, thereby effectively reducing the occurrence of cell shell deformation and scratches, greatly reducing the risk of damage to the internal electrode structure and separator of the cell, ensuring the integrity of the cell, and reducing the probability of the cell being damaged by external forces.
[0043] Specifically, the shapes of the first protection plate 200 and the second protection plate 300 are adapted to the sides of the battery cell assembly in the battery cell stack 100, so as to achieve a tight fit between the first protection plate 200 and the second protection plate 300 and the battery cell stack 100, and fully cover and protect the sides of the battery cell stack 100.
[0044] Specifically, the first protective plate 200 and the second protective plate 300 can be rectangular plates.
[0045] Specifically, the dimensions of the first protection plate 200 and the second protection plate 300 can be greater than or equal to the ends of the cell stack 100, ensuring that the first protection plate 200 and the second protection plate 300 can completely cover the parts at both ends of the cell stack 100 that are susceptible to the clamping force of the tooling.
[0046] Specifically, the edges of the first protective plate 200 and the second protective plate 300 can be rounded or beveled to avoid injury to operators from sharp edges during handling or installation, and also to prevent the edges of the first protective plate 200 and the second protective plate 300 from scratching other components.
[0047] Specifically, the first protection plate 200 and the second protection plate 300 can be made of high-strength insulating materials, such as polycarbonate (PC), polyphenylene sulfide (PPS), or insulating composite materials. This material not only has excellent electrical insulation properties, effectively preventing electrical short circuits between the battery cell and the external structure, thus ensuring the safety of the battery system, but also possesses high mechanical strength, capable of withstanding the pressure of tooling clamping and external forces such as vibration and impact experienced by the battery during use, protecting the battery cell from damage.
[0048] Specifically, the first protection plate 200 and the second protection plate 300 can be PC sheets.
[0049] In some embodiments, the positive electrode tab of the battery cell stack 100 is coated with thermally conductive adhesive, and a first side plate 110 is attached to the side near the positive electrode tab. The negative electrode tab of the battery cell stack 100 is coated with thermally conductive adhesive, and a second side plate 120 is attached to the side near the negative electrode tab. Applying thermally conductive adhesive to the battery cell tabs reduces the amount of adhesive used compared to traditional potting methods without affecting thermal conductivity. Similarly, attaching the side plate after applying the adhesive effectively prevents adhesive leakage. Specifically, the side plate is a plastic side plate.
[0050] It should be noted that applying thermally conductive adhesive to the tabs utilizes the adhesive's excellent thermal conductivity. The thermally conductive filler in the adhesive establishes an efficient heat transfer path between the tabs and the surrounding environment. When applying the thermally conductive adhesive, only a thin layer needs to be applied to the critical tab areas to allow heat to be quickly conducted from the tabs to components such as the side plates, achieving efficient heat dissipation. The tabs generate a large amount of heat during charging and discharging, and the presence of the thermally conductive adhesive provides a rapid channel for heat dissipation.
[0051] In some embodiments, the cell stacking module includes a cover plate 600, which covers the top of the cell stack 100. During use, the cell stack 100 may be subjected to external forces such as impacts or compression from foreign objects above. As a barrier on the top of the cell stack 100, the cover plate 600 can directly withstand these external forces and prevent damage to the top of the cell stack 100.
[0052] In some embodiments, the cell stacking module includes a mica plate 700, which covers the side of the cover plate 600 opposite to the cell stack 100. The mica plate 700 is made of an insulating material with high electrical resistance, effectively preventing current flow. In the cell stacking module, the cells generate an electric field during charging and discharging. The mica plate 700, located above the cover plate 600, isolates this electric field from the external environment, preventing current leakage to other components of the battery system or external objects, avoiding short circuits and safety accidents caused by leakage, and ensuring the electrical safety of the battery system. Furthermore, the mica plate 700 has a low thermal conductivity, effectively blocking heat transfer. The cells generate a large amount of heat during charging and discharging; if this heat accumulates within the cell stacking module, it will affect the performance and lifespan of the cells. The mica plate 700 acts as a thermal barrier between the cell stack 100 and the outside world, slowing down the rate at which heat is dissipated from the cell to the surrounding environment. This allows the heat generated by the cell to be dissipated more concentratedly through a dedicated heat dissipation channel, improving heat dissipation efficiency while preventing damage to surrounding components due to overheating and maintaining the thermal stability of the battery system.
[0053] In some embodiments, a first through hole 610 is provided on the cover plate 600, and a second through hole 710 communicating with the first through hole 610 is provided on the mica plate 700. The first through hole 610 communicates with the mounting space of the cell stack 100, and the second through hole 710 communicates with the outside. Both the first through hole 610 and the second through hole 710 are vents. The first through hole 610 and the second through hole 710 form a heat dissipation channel for the cell stack 100.
[0054] Specifically, multiple first through holes 610 and multiple second through holes 710 are provided, with each of the multiple first through holes 610 and the multiple second through holes 710 corresponding to one another, thereby improving the heat dissipation efficiency of the battery cell stack 100.
[0055] In some embodiments, the cell stacking module further includes a first insulation layer 810 disposed between the first protection plate 200 and the first foam 400. The cell stacking module further includes a second insulation layer 820 disposed between the second protection plate 300 and the second foam 500.
[0056] It should be noted that the performance of battery cells is highly sensitive to temperature, and a suitable operating temperature range can ensure the charge-discharge efficiency and cycle life of the cells. Ambient temperatures can vary significantly under different operating environments. The first insulation layer 810 and the second insulation layer 820 can reduce heat loss from the cell stack 100, maintaining the cell temperature in low-temperature environments and preventing increased internal resistance and decreased charge-discharge performance due to excessively low temperatures. In high-temperature environments, they can prevent excessive external heat from entering the cell stack 100, preventing damage or performance degradation due to overheating, thereby stabilizing the operating temperature of the cell stack 100 and improving the overall performance of the battery.
[0057] Specifically, the materials of the first insulation layer 810 and the second insulation layer 820 can be foam plastic, aerogel felt, etc.
[0058] In some embodiments, the cell stacking module further includes a first heat insulation layer 910 disposed between the first protective plate 200 and the first foam 400. The cell stacking module also includes a second heat insulation layer 920 disposed between the second protective plate 300 and the second foam 500. Specifically, the first heat insulation layer 910 and the second heat insulation layer 920 may be ceramic fiber or vacuum insulation panels.
[0059] In another embodiment, a module-less battery system includes a housing and the aforementioned cell stacking module, the cell stacking module being disposed within the housing.
[0060] Specifically, the moduleless battery system also includes fasteners. The cover plate 600 of the cell stacking module is provided with a mounting part 620, and the mounting part 620 is provided with a first mounting hole 621. The housing is provided with a second mounting hole that matches the first mounting hole 621. The fasteners pass through the first mounting hole 621 and the second mounting hole to place the cell stacking module in the housing.
[0061] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural or procedural transformations made based on the content of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.
Claims
1. An electric cell stack module for a module-less battery system, characterized by, include: A battery cell stack, wherein a first foam is provided at one end of the battery cell stack and a second foam is provided at the other end; A first protection plate is disposed at one end of the battery cell stack, and the first protection plate is attached to the side of the first foam away from the battery cell stack. and The second protection plate is disposed at the other end of the cell stack and is attached to the side of the second foam away from the cell stack.
2. The electric cell stack module of claim 1, wherein, The positive electrode tab of the battery cell stack is coated with thermally conductive adhesive, and a first side plate is attached to the side near the positive electrode tab; and / or The negative electrode tab of the battery cell stack is coated with thermally conductive adhesive, and a second side plate is attached to the side near the negative electrode tab.
3. The electric cell stack module of claim 1, wherein, The cell stacking module includes a cover plate, which is disposed on top of the cell stack.
4. The electric cell stack module of claim 3, wherein, The cell stacking module includes a mica plate, which is disposed on the side of the cover plate opposite to the cell stack.
5. The electric cell stack module of claim 4, wherein, The cover plate has a first through hole, and the mica plate has a second through hole that communicates with the first through hole. The first through hole communicates with the installation space of the battery cell stack, and the second through hole communicates with the outside.
6. The electric cell stack module of claim 5, wherein, Multiple first through holes and multiple second through holes are provided, with each of the multiple first through holes corresponding to one of the multiple second through holes.
7. The electric cell stack module of claim 1, wherein, The cell stacking module further includes a first insulation layer, which is disposed between the first protective plate and the first foam; and / or The cell stacking module also includes a second insulation layer, which is disposed between the second protective plate and the second foam.
8. The cell stacking module according to claim 1, characterized in that, The cell stacking module further includes a first heat insulation layer, which is disposed between the first protective plate and the first foam; and / or The cell stacking module also includes a second heat insulation layer, which is disposed between the second protective plate and the second foam.
9. A module-less battery system, characterized by, It includes a housing and a cell stacking module as described in any one of claims 1 to 8, wherein the cell stacking module is disposed within the housing.
10. The moduleless battery system of claim 9, wherein, The moduleless battery system also includes fasteners. The cover plate of the cell stacking module is provided with a mounting part, the mounting part is provided with a first mounting hole, and the housing is provided with a second mounting hole that matches the first mounting hole. The fastener passes through the first mounting hole and the second mounting hole.