Liquid absorption assembly, battery and vehicle

Abstract

The invention discloses a liquid absorption assembly, a battery and a vehicle, the liquid absorption assembly comprises a supporting piece and a liquid absorption glue layer, the supporting piece is suitable for being clamped between a roll core and a cover plate of the battery, the supporting piece is located on the peripheral side of electrolyte, and the liquid level of the electrolyte is lower than the height of the roll core; the surface of the supporting piece comprises a first surface facing the roll core, a second surface making contact with the electrolyte and a third surface connecting the first surface and the second surface, and the liquid absorbing glue layer is coated on each of the first surface, the second surface and the third surface. According to the liquid absorption assembly provided by the invention, the manufacturing cost of the battery is not increased and the production takt of the battery is not influenced while the electrolyte required by the roll core is ensured.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and more specifically to a liquid absorption assembly, a battery, and a vehicle. Background Technology

[0002] Electrolyte is the carrier of ions in a battery, primarily acting as a conductor between the positive and negative electrodes of a lithium battery. In related technologies, when the battery is inverted, the electrolyte tends to accumulate at the bottom of the casing and cannot directly contact the core, resulting in insufficient electrolyte in the core. To address this, related technologies typically use external absorbent tape or increase electrolyte retention (electrolyte retention is a crucial parameter for preventing electrolyte degradation during later cycles) to mitigate this defect. However, absorbent tape occupies casing space, affecting battery energy density and adding new assembly steps, increasing manufacturing costs; while increasing electrolyte retention increases process complexity and impacts production cycle time. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of the present invention propose a liquid absorption assembly that ensures the electrolyte required for the core without increasing battery manufacturing costs or affecting battery production cycle.

[0005] Embodiments of the present invention also propose a battery and a vehicle.

[0006] The liquid-absorbing assembly of this invention includes a support member and a liquid-absorbing adhesive layer. The support member is adapted to be sandwiched between the battery core and the cover plate. The support member is located on the periphery of the electrolyte, and the liquid level of the electrolyte is lower than the height of the core. The surface of the support member includes a first surface facing the core, a second surface in contact with the electrolyte, and a third surface connecting the first surface and the second surface. The liquid-absorbing adhesive layer is coated on each of the first surface, the second surface, and the third surface.

[0007] According to an embodiment of the present invention, the liquid-absorbing assembly has a support member that is a plastic part sandwiched between the core and the cover plate in the battery. By coating each of the first, second, and third surfaces of the support member with an absorbent adhesive layer, when the battery is inverted to allow electrolyte to accumulate near the cover plate, the electrolyte comes into contact with the portion of the absorbent adhesive layer that is in contact with the second surface. This facilitates the absorption and transfer of electrolyte by the absorbent adhesive layer to the separator of the core, ensuring the required electrolyte for the core. The absorbent adhesive layer is fixed to at least a portion of the surface of the support member by coating, eliminating the need for additional installation processes within the battery casing. Compared to the use of absorbent tape in related technologies, batteries using the liquid-absorbing assembly of this embodiment do not introduce additional accessories, thus not increasing battery manufacturing costs. Furthermore, the absorbent adhesive layer maintains the original liquid retention capacity, effectively preventing disruption to battery production cycle due to increased liquid retention.

[0008] In some embodiments, the surface of the support member further includes a fourth surface opposite to the first surface, the fourth surface being connected to the second surface.

[0009] In some embodiments, the liquid absorption assembly further includes a protective film that is detachably attached to the side of the liquid absorption adhesive layer away from the support.

[0010] In some embodiments, the thickness of the absorbent layer is d, wherein 0.5 mm-1 mm.

[0011] In some embodiments, the absorbent layer comprises a layer of porous polymer material.

[0012] The battery according to an embodiment of the present invention includes a core, a cover plate, and an absorbent assembly as described in any of the above embodiments, wherein the support member is sandwiched between the core and the cover plate, and a portion of the absorbent adhesive layer is sandwiched between the support member and the core.

[0013] The technical advantages of the battery according to the embodiments of the present invention are the same as those of the liquid absorption components in the above embodiments, and will not be repeated here.

[0014] In some embodiments, the battery further includes a housing and an electrolyte, the housing having a receiving cavity with an opening at one end, a cover plate connected to the housing and closing the opening, and the core, the electrolyte, the support member and the absorbent layer all disposed within the receiving cavity;

[0015] The second and third surfaces of the support member are spaced apart from the inner surface of the housing. When the opening faces downward, the electrolyte is located between the second surface of the support member and the inner surface of the housing.

[0016] In some embodiments, the housing includes a first side plate and a second side plate opposite each other along a first direction, each of the first side plate and the second side plate being spaced apart from the support member.

[0017] In some embodiments, the area of ​​the first surface is smaller than the contact area between the absorbent layer and the core.

[0018] The vehicle according to an embodiment of the present invention includes a liquid-absorbing assembly or battery as described above.

[0019] The technical advantages of the vehicle according to the embodiments of the present invention are the same as those of the liquid absorption component and battery in the above embodiments, and will not be repeated here. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a battery according to an embodiment of the present invention.

[0021] Figure 2 yes Figure 1 AA is a cross-sectional view.

[0022] Figure 3 yes Figure 2 Enlarged image B.

[0023] Figure label:

[0024] 1. Support component; 11. First surface; 12. Second surface; 13. Third surface; 14. Fourth surface; 2. Liquid-absorbing adhesive layer; 3. Core; 4. Cover plate; 5. Housing; 51. First side plate; 52. Second side plate; 6. Electrolyte. Detailed Implementation

[0025] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] The following is combined with Figures 1-3 A liquid suction assembly according to an embodiment of the present invention is described.

[0027] The liquid-absorbing assembly of this embodiment includes a support member 1 and a liquid-absorbing adhesive layer 2. The support member 1 is adapted to be sandwiched between the battery core 3 and the cover plate 4. The support member 1 is located around the electrolyte 6, and the liquid level of the electrolyte 6 is lower than the height of the core 3. The surface of the support member 1 includes a first surface 11 facing the core 3, a second surface 12 in contact with the electrolyte 6, and a third surface 13 connecting the first surface 11 and the second surface 12. The liquid-absorbing adhesive layer 2 is coated on each of the first surface 11, the second surface 12, and the third surface 13.

[0028] According to an embodiment of the present invention, the liquid-absorbing assembly has a support member 1 that is a plastic part sandwiched between the core 3 and the cover plate 4 in the battery. By coating each of the first surface 11, second surface 12, and third surface 13 of the support member 1 with an absorbent adhesive layer 2, when the battery is inverted so that the electrolyte 6 accumulates near the cover plate 4, the electrolyte 6 comes into contact with the portion of the absorbent adhesive layer that is in contact with the second surface 12. This facilitates the absorption and transfer of the electrolyte 6 to the separator of the core 3 by the absorbent adhesive layer, ensuring the required electrolyte 6 for the core 3. The absorbent adhesive layer 2 is fixed to at least a portion of the surface of the support member 1 by coating, eliminating the need for additional steps in installing it inside the battery casing 5. Compared to the use of absorbent tape in related technologies, the battery using the liquid-absorbing assembly of this embodiment does not introduce additional accessories, thus not increasing battery manufacturing costs. Furthermore, the absorbent adhesive layer 2 maintains the original liquid retention capacity, effectively preventing the increase in liquid retention from affecting the battery production cycle.

[0029] It should be noted that the absorbent layer 2 refers to an adhesive layer that has the functions of absorbing and transferring electrolyte 6 and is corrosion resistant. The support 1 is made of insulating material, such as plastic.

[0030] In some embodiments, the surface of the support member 1 further includes a fourth surface 14 opposite to the first surface 11, and the fourth surface 14 is connected to the second surface 12.

[0031] That is, the second surface 12 extends to the fourth surface 14, that is, to the inner surface of the cover plate 4, thereby making the area of ​​the absorbent layer 2 coated on the second surface larger. When the cell is inverted so that the electrolyte 6 accumulates near the cover plate 4, the contact area between the absorbent layer 2 coated on the second surface and the electrolyte 6 is larger, the absorbent layer 2 has a higher absorbency, and the absorbent layer 2 can more reliably absorb the electrolyte 6 into the core 3.

[0032] Specifically, such as Figure 3 As shown, when the battery is inverted so that the cover plate 4 is below the housing 5, the second surface 12 is the part of the side of the support member 1 near the bottom, and the third surface 13 is the part of the side of the support member 1 near the first surface.

[0033] In some embodiments, the liquid absorption assembly further includes a protective film that is detachably attached to the side of the liquid absorption layer 2 away from the support member 1.

[0034] The protective film can effectively prevent external dust and moisture from adhering to the absorbent layer 2, and also prevent the absorbent layer 2 from sticking to external components, thereby effectively ensuring the functionality of the absorbent layer 2 and ensuring the reliability of the absorbent assembly before installation.

[0035] Specifically, when using the support member 1 to assemble the battery cover 4, the protective film needs to be torn off to expose the absorbent layer 2. The protective film is transparent to facilitate observation and confirmation of the condition of the absorbent layer 2 before use of the absorbent assembly.

[0036] In some embodiments, the thickness of the absorbent layer 2 is d, wherein 0.5 mm-1 mm.

[0037] The absorbent layer 2 of the above-mentioned size is neither too small, which would result in a low absorption rate and thus affect the effective absorption of electrolyte 6 by the core 3, nor too large, which would occupy too much space inside the casing 5, thus effectively ensuring the energy density inside the battery.

[0038] Specifically, the thickness of the absorbent layer 2 can be 0.5 mm, 0.8 mm, and 1 mm.

[0039] In some embodiments, the absorbent layer 2 comprises a layer of porous polymer material.

[0040] The absorbent layer 2 thus produced has a higher absorbency than absorbent tapes in related technologies, based on a certain thickness and a certain contact area with electrolyte 6, thereby further ensuring the reliability of the core 3 in absorbing electrolyte 6.

[0041] Specifically, the polymer porous material layer is made of nanoporous materials or honeycomb activated carbon sponge.

[0042] The battery according to an embodiment of the present invention includes a core 3, a cover plate 4, and an absorbent assembly as described in any of the above embodiments. A support member 1 is sandwiched between the core 3 and the cover plate 4, and a portion of the absorbent adhesive layer 2 is sandwiched between the support member 1 and the core 3.

[0043] The technical advantages of the battery according to the embodiments of the present invention are the same as those of the liquid absorption components in the above embodiments, and will not be repeated here.

[0044] In some embodiments, the battery further includes a housing 5 and an electrolyte 6. The housing 5 has a receiving cavity with an opening at one end, and a cover plate 4 is connected to the housing 5 and closes the opening. The core 3, electrolyte 6, support member 1, and absorbent layer 2 are all disposed within the receiving cavity. The second surface 12 and the third surface 13 of the support member 1 are spaced apart from the inner surface of the housing 5. When the opening is facing downwards, the electrolyte 6 is located between the second surface 12 of the support member 1 and the inner surface of the housing 5.

[0045] That is, a space for the accumulation of electrolyte 6 is formed between the second surface 12 of the support member 1 and the inner surface of the housing 5. This space is connected to the upper core 3. When the opening is facing downward, the electrolyte 6 is accumulated in the space and absorbed and transferred to the diaphragm of the core 3 through the absorbent layer 2, so that the core 3 can absorb the electrolyte 6.

[0046] Specifically, when the support 1 and the absorbent layer 2 are sandwiched between the cover plate 4 and the diaphragm of the core 3, the support 1 and the absorbent layer 2 compress and deform the core 3 by 1.5mm, thereby ensuring close contact between the absorbent layer 2 and the diaphragm of the core 3, and thus effectively ensuring the smooth absorption path of the absorbent layer 2.

[0047] In some embodiments, such as Figure 2 As shown, the housing 5 includes a first side plate 51 and a second side plate 52 opposite each other along a first direction, each of the first side plate 51 and the second side plate 52 being spaced apart from the support member 1.

[0048] At this time, a portion of the second surface 12 of the support member 1 faces the first side plate 51, and another portion faces the second side plate 52. When the battery is inverted, the absorbent layer 2 can form two absorbent paths arranged along the first direction. The electrode liquid can be transferred to the core 3 through the two absorbent paths at the same time, so that the core 3 has a better and more reliable absorption effect on the electrolyte 6.

[0049] In some embodiments, such as Figure 2 and Figure 3 As shown, the area of ​​the first surface 11 is smaller than the contact area between the absorbent layer 2 and the core 3.

[0050] Therefore, when the electrolyte 6 is absorbed and transferred to the absorbent layer 2 coated on the first surface 11, it will not directly contact the core 3. The absorbent layer 2 on the first surface 11 can fully absorb the electrolyte 6, and then transfer it between the core 3 and the support member 1. The absorbent layer 2 has a better absorption effect on the electrolyte 6, and the core 3 has higher reliability in absorbing the electrolyte 6.

[0051] The vehicle according to an embodiment of the present invention includes a liquid-absorbing assembly or battery as described above.

[0052] The technical advantages of the vehicle according to the embodiments of the present invention are the same as those of the liquid absorption component and battery in the above embodiments, and will not be repeated here.

[0053] In the description of this invention, 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," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0054] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0055] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0057] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0058] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A liquid absorption assembly, characterized in that, include: A support member adapted to be sandwiched between the battery core and the cover plate, the support member being located on the periphery of the electrolyte, the electrolyte level being lower than the height of the core, the surface of the support member including a first surface facing the core, a second surface in contact with the electrolyte, and a third surface connecting the first surface and the second surface; and An absorbent layer is applied to each of the first surface, the second surface, and the third surface.

2. The liquid absorption assembly according to claim 1, characterized in that, The surface of the support member also includes a fourth surface opposite to the first surface, and the fourth surface is connected to the second surface.

3. The liquid absorption assembly according to claim 1, characterized in that, The liquid absorption assembly also includes a protective film that is detachably attached to the side of the liquid absorption adhesive layer away from the support.

4. The liquid absorption assembly according to claim 1, characterized in that, The thickness of the absorbent layer is d, where 0.5mm-1mm.

5. The liquid absorption assembly according to claim 1, characterized in that, The absorbent layer comprises a layer of porous polymer material.

6. A battery, characterized in that, The device includes a core, a cover plate, and an absorbent assembly according to any one of claims 1-5, wherein the support is sandwiched between the core and the cover plate, and a portion of the absorbent adhesive layer is sandwiched between the support and the core.

7. The battery according to claim 6, characterized in that, The battery also includes a casing and an electrolyte. The casing has a receiving cavity with an opening at one end. The cover plate is connected to the casing and closes the opening. The core, the electrolyte, the support member, and the absorbent layer are all disposed within the receiving cavity. The second and third surfaces of the support member are spaced apart from the inner surface of the housing. When the opening faces downward, the electrolyte is located between the second surface of the support member and the inner surface of the housing.

8. The battery according to claim 7, characterized in that, The housing includes a first side plate and a second side plate opposite each other along a first direction, each of the first side plate and the second side plate being spaced apart from the support member.

9. The battery according to claim 6, characterized in that, The area of ​​the first surface is smaller than the contact area between the absorbent layer and the core.

10. A vehicle, characterized in that, Includes the liquid absorption assembly according to any one of claims 1-5 or the battery according to any one of claims 6-9.

Images