Insulating structural member, battery case and battery
By setting a recessed boss and a flow guiding structure for insulating components inside the battery casing, the problem of slow electrolyte injection rate is solved, enabling rapid electrolyte wetting of the electrode assembly and improving battery assembly efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SVOLT ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-04-21
AI Technical Summary
During battery assembly, the electrolyte injection channel is blocked by the electrode assembly due to the tight fit between the internal insulation structure and the electrode assembly, resulting in a slow electrolyte injection rate, prolonged electrolyte wetting time of the electrode assembly, and reduced work efficiency.
An insulating structural component is designed, including an insulating body and a recessed boss. The recessed boss is provided with a first flow guiding structure and a second flow guiding structure that communicate with the injection hole, so as to ensure that the electrolyte can flow out through the first surface and the second surface, avoid the injection channel being blocked by the electrode group, and improve the electrolyte injection rate.
By designing a flow-guiding structure, the electrolyte wetting time of the electrode assembly is shortened, the electrolyte injection rate and assembly efficiency are improved, and the battery casing maintains efficient electrolyte flow while stabilizing the electrode assembly.
Smart Images
Figure CN224153564U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of battery technology, and in particular to an insulating structural component, a battery casing, and a battery. Background Technology
[0002] Lithium-ion batteries are widely used in various fields such as transportation power supply, power storage, new energy storage power supply, aerospace and military industries due to their advantages such as large capacity, high operating voltage, strong charge retention capacity, and long cycle life. A typical lithium-ion battery structure includes electrode assembly, electrolyte, cover plate, casing, and internal and external insulation structures. The cover plate and casing are usually fixed by laser welding, forming a sealed space with a certain structural strength to protect the electrode assembly. The cover plate generally integrates functional areas such as electrode posts, explosion-proof valves, and electrolyte injection holes. The electrolyte injection hole is usually located on the cover plate, and a through hole communicating with the injection hole is opened in the internal insulation structure to facilitate the inflow of electrolyte and achieve the purpose of wetting the electrode assembly.
[0003] However, during actual battery assembly, the inner insulation structure is used to compress the electrode assembly to improve its stability. But while ensuring the stability of the electrode assembly, the inner insulation structure must be tightly fitted to the electrode assembly. This can cause some or all of the electrolyte injection channels on the inner insulation structure that are connected to the injection holes to be blocked by the electrode assembly. As a result, the electrolyte can only penetrate into the interior little by little through permeation, which slows down the rate of electrolyte injection, prolongs the time for the electrolyte to wet the electrode assembly, and reduces work efficiency. Utility Model Content
[0004] The purpose of this invention is to provide an insulating structural component, a battery casing, and a battery, which have a short electrolyte injection time and high efficiency in wetting the electrode assembly.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] On one hand, an insulating structural component is provided, which is disposed inside a battery casing and located on the side of the electrode assembly extending from the tabs. The battery casing includes a cover plate body and a casing body. An injection hole is formed on the wall surface of the cover plate body or the casing body opposite to the tabs. The insulating structural component includes an insulating body and a recessed boss. The recessed boss is disposed on the insulating body and protrudes in a direction close to the electrode assembly. The recessed boss is disposed opposite to the injection hole and has a first flow guiding structure and a second flow guiding structure communicating with the injection hole. The recessed boss has a first surface disposed opposite to the electrode assembly and a second surface surrounding the first surface. The first flow guiding structure is used to guide the electrolyte flowing out of the injection hole to flow out of the first surface, and the second flow guiding structure is used to guide the electrolyte flowing out of the injection hole to flow out of the second surface.
[0007] Optionally, the first flow guiding structure on the sunken protrusion is provided in multiple ways, and the second flow guiding structure corresponds one-to-one with the multiple first flow guiding structures.
[0008] Optionally, the total flow area of the plurality of first flow guiding structures is S1, and the total flow area of the plurality of second flow guiding structures is S2, and satisfies that 0.5≤S2 / (S1+S2)≤0.65.
[0009] Optionally, the sum of the surface areas of the first surface and the second surface is S3, and satisfies 0.3≤(S1+S2) / S3≤0.5.
[0010] Optionally, each of the second flow guiding structures may or may not be connected to the corresponding first flow guiding structure.
[0011] Optionally, the recessed protrusion has a liquid storage tank recessed on the side opposite to the electrode assembly, and both the first flow guiding structure and the second flow guiding structure are connected to the liquid storage tank.
[0012] Optionally, the liquid storage tank is further provided with a confluence slope, the angle between the confluence slope and the first surface is θ, and satisfies 90°≤θ≤150°.
[0013] On the other hand, a battery casing is also provided, the battery casing including a cover plate body, a casing body and an insulating structural member as described in any of the above claims, the casing body being a hollow shell structure with an opening, the cover plate body being disposed at the opening of the casing body to form a receiving cavity for accommodating the electrode assembly, the insulating structural member being located within the receiving cavity and disposed on the side of the electrode assembly extending from the tab.
[0014] On the other hand, a battery is also provided, the battery including an electrode assembly and a battery casing as described above, the electrode assembly being housed within the battery casing.
[0015] The beneficial effects of this utility model are:
[0016] This invention provides an insulating structural component. By forming a recessed boss opposite the injection hole, the insulating structural component facilitates the creation of a first guiding structure for drawing electrolyte from the first surface of the recessed boss and a second guiding structure for drawing electrolyte from the second surface of the recessed boss. This allows the electrolyte flowing from the injection hole to still flow out through the second guiding structure on the second surface, even if the electrode assembly blocks the first guiding structure on the first surface, while the insulating structural component stabilizes the electrode assembly. This reduces the impact of the insulating structural component on electrolyte flow during electrode assembly stabilization, increases the electrolyte injection rate, shortens the electrolyte wetting time of the electrode assembly, and improves operational efficiency.
[0017] This utility model also provides a battery casing that, by applying the above-mentioned insulating structural components, not only has high stability for the electrode assembly, but also has a high electrolyte injection rate.
[0018] This utility model also provides a battery that, by applying the aforementioned battery casing, can effectively shorten the time for electrolyte injection and immersion operations, improve the assembly speed, and shorten the production cycle. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the insulating structural component provided by this utility model;
[0020] Figure 2 yes Figure 1 Enlarged view of the structure of section A;
[0021] Figure 3 This is a schematic diagram of the structure of the insulating structural component and the cover plate body after disassembly provided by this utility model.
[0022] In the picture:
[0023] 100. Cover plate body; 200. Injection hole;
[0024] 1. Insulating body;
[0025] 2. Sinking boss; 21. First flow guiding structure; 22. Second flow guiding structure; 23. First surface; 24. Second surface; 25. Liquid storage tank; 26. Converging slope. Detailed Implementation
[0026] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not the entire structure.
[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0028] 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.
[0029] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and 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. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.
[0030] Therefore, in order to solve the problem that during assembly, a portion or all of the electrolyte injection channels communicating with the injection holes on the inner insulation structure are blocked by the electrode group due to the tight fit between the inner insulation structure and the electrode group, and to improve the electrolyte injection rate, shorten the electrolyte wetting time of the electrode group, and improve work efficiency, this embodiment provides an insulating structural component. The insulating structural component is disposed inside the battery casing and is located on the side of the electrode group that extends out of the tab. The battery casing includes a cover plate body 100 and a casing body. An injection hole 200 is opened on the wall surface of the cover plate body 100 or the casing body opposite to the tab.
[0031] like Figures 1 to 3 As shown, the insulating structure includes an insulating body 1 and a recessed boss 2. The recessed boss 2 is disposed on the insulating body 1 and protrudes in the direction close to the electrode group. The recessed boss 2 is disposed opposite to the injection hole 200 and has a first flow guiding structure 21 and a second flow guiding structure 22 communicating with the injection hole 200. The recessed boss 2 has a first surface 23 disposed opposite to the electrode group and a second surface 24 surrounding the first surface 23. The first flow guiding structure 21 is used to guide the electrolyte flowing out of the injection hole 200 to flow out of the first surface 23, and the second flow guiding structure 22 is used to guide the electrolyte flowing out of the injection hole 200 to flow out of the second surface 24.
[0032] The insulating structure has a recessed boss 2 opposite to the injection hole 200, which facilitates the creation of a first flow guiding structure 21 for leading electrolyte from the first surface 23 of the recessed boss 2 and a second flow guiding structure 22 for leading electrolyte from the second surface 24 of the recessed boss 2. This allows the electrolyte flowing out of the injection hole 200 to still flow out through the second flow guiding structure 22 on the second surface 24, even if the electrode assembly blocks the first flow guiding structure 21 on the first surface 23 while the insulating structure is stabilizing the electrode assembly. This reduces the impact of the insulating structure on the electrolyte flow when stabilizing the electrode assembly, increases the electrolyte injection rate, shortens the electrolyte wetting time of the electrode assembly, and improves work efficiency.
[0033] In this embodiment, since the insulating structural component is in direct contact with the electrode assembly, it is necessary to ensure insulation while avoiding damage to the electrode assembly. Therefore, the insulating structural component is made of plastic and integrally molded using injection molding, simultaneously constructing an insulating body 1, a recessed boss 2, and a first flow guiding structure 21 and a second flow guiding structure 22 disposed on the recessed boss 2. The injection hole 200 can be located in different positions according to the structural design. When the side of the electrode assembly extending from the tab is opposite to the cover plate body 100, the injection hole 200 is located on the cover plate body 100. When the side of the electrode assembly extending from the tab is opposite to a wall surface of the outer casing body, the injection hole 200 is located on the wall surface of the outer casing body opposite to the tab. In this embodiment, the injection hole 200 is located on the cover plate body 100. Furthermore, this insulating structural component can be used in different types of batteries, such as blade batteries, prismatic batteries, or large cylindrical batteries. In this embodiment, the battery casing is applied to a blade battery.
[0034] Optionally, such as Figure 2 As shown, the recessed boss 2 has multiple first flow guiding structures 21, and each second flow guiding structure 22 corresponds to one of the multiple first flow guiding structures 21. By providing multiple first flow guiding structures 21 and multiple second flow guiding structures 22 on the recessed boss 2, even if some of the first flow guiding structures 21 are blocked by the electrode assembly during assembly, the electrolyte can still be injected through some of the first flow guiding structures 21 and second flow guiding structures 22, ensuring the electrolyte flow rate and shortening the time for wetting the electrode assembly.
[0035] In this embodiment, the number of first flow guiding structures 21 and the number of second flow guiding structures 22 can be freely set according to requirements, wherein the multiple first flow guiding structures 21 have as large a gap as possible between each other, thereby reducing the number of ones blocked by the pole group.
[0036] Optionally, such as Figure 2 , Figure 3As shown, the total flow area of the multiple first flow guiding structures 21 is S1, and the total flow area of the multiple second flow guiding structures 22 is S2, satisfying 0.5≤S2 / (S1+S2)≤0.65. By limiting the total flow area S1 of the multiple first flow guiding structures 21 and the total flow area S2 of the multiple second flow guiding structures 22 to satisfy 0.5≤S2 / (S1+S2)≤0.65, it is ensured that the total flow area S2 of the multiple second flow guiding structures 22 has a sufficient proportion to meet the flow of electrolyte. This ensures that even if all the multiple first flow guiding structures 21 are blocked, the total flow area S2 of the multiple second flow guiding structures 22 can still meet the requirements of electrolyte injection and wetting of the electrode assembly.
[0037] Optionally, such as Figure 2 , Figure 3 As shown, the sum of the surface areas of the first surface 23 and the second surface 24 is S3, and satisfies 0.3≤(S1+S2) / S3≤0.5. By limiting the sum of the surface areas S3 of the first surface 23 and the second surface 24 to the sum of the total flow area S1 of the multiple first flow guiding structures 21 and the total flow area S2 of the multiple second flow guiding structures 22, on the one hand, it avoids the sum of the total flow area S1 of the multiple first flow guiding structures 21 and the total flow area S2 of the multiple second flow guiding structures 22 being too small, resulting in a slow flow rate; on the other hand, it avoids the sum of the total flow area S1 of the multiple first flow guiding structures 21 and the total flow area S2 of the multiple second flow guiding structures 22 being too large, resulting in too little remaining material after the sinker 2 has the first flow guiding structure 21 and the second flow guiding structure 22, thus reducing the structural strength.
[0038] In this embodiment, since the recessed boss 2 has a polyhedral structure, the first surface 23 is the bottom surface that abuts against the pole group, and the second surface 24 consists of the four sides surrounding the first surface 23. In other embodiments, the recessed boss 2 can also be a cylindrical structure. In this case, the first surface 23 is still the bottom surface that abuts against the pole group, and the second surface 24 is a cylindrical curved surface surrounding the first surface 23.
[0039] To verify the influence of the magnitudes of the above-mentioned relationships S2 / (S1+S2) and (S1+S2) / S3 on the electrolyte wetting rate of the electrode assembly, as shown in Table 1, three sets of examples and six sets of comparative examples are provided to verify the three.
[0040] Table 1
[0041]
[0042] In Example 1, the value of the relation S2 / (S1+S2) was set to 0.5, and the value of the relation (S1+S2) / S3 was set to 0.3. Experimental verification showed that the electrolyte wetting time of the electrode assembly met the process requirements.
[0043] In Example 2, the value of the relation S2 / (S1+S2) was set to 0.65, and the value of the relation (S1+S2) / S3 was set to 0.35. Experimental verification showed that the electrolyte wetting time of the electrode assembly met the process requirements.
[0044] In Example 3, the value of the relation S2 / (S1+S2) was set to 0.6, and the value of the relation (S1+S2) / S3 was set to 0.5. Experimental verification showed that the electrolyte wetting time of the electrode assembly met the process requirements.
[0045] As can be seen from Examples 1 to 3, when the relationship S2 / (S1+S2) meets the range of 0.5≤S2 / (S1+S2)≤0.65, and the relationship (S1+S2) / S3 also meets the range of 0.3≤(S1+S2) / S3≤0.5, the electrolyte wetting time of the electrode group meets the process requirements, the wetting speed is fast, and the wetting requirements of the electrode group are met.
[0046] In Comparative Example 1, the value of the relation S2 / (S1+S2) was set to 0.4, and the value of the relation (S1+S2) / S3 was set to 0.3. Experimental results showed that the electrolyte wetting time of the electrode assembly exceeded the process requirement range by approximately 5.8%.
[0047] In Comparative Example 2, the value of the relation S2 / (S1+S2) was set to 0.45, and the value of the relation (S1+S2) / S3 was set to 0.3. Experimental results showed that the electrolyte wetting time of the electrode assembly exceeded the process requirement range by about 4.5%.
[0048] In Comparative Example 3, the value of the relation S2 / (S1+S2) was set to 0.7, and the value of the relation (S1+S2) / S3 was set to 0.45. Experimental verification showed that the electrolyte wetting time of the electrode group met the process requirements, but the deformation of the sinking boss 2 was too large after being squeezed by the electrode group.
[0049] As can be seen from Comparative Examples 1 to 3, when the relationship (S1+S2) / S3 falls within the range of 0.3≤(S1+S2) / S3≤0.5, but the relationship S2 / (S1+S2) is less than the minimum value of the range of 0.5≤S2 / (S1+S2)≤0.65, the electrolyte wetting time of the electrode assembly exceeds the process requirement range, and the wetting speed is slow. When the relationship S2 / (S1+S2) is greater than the maximum value of the range of 0.5≤S2 / (S1+S2)≤0.65, although the electrolyte wetting time of the electrode assembly meets the process requirements, the deformation of the sinking boss 2 after being squeezed by the electrode assembly is too large, and the structural strength is poor.
[0050] In Comparative Example 4, the value of the relation S2 / (S1+S2) was set to 0.6, and the value of the relation (S1+S2) / S3 was set to 0.25. Experimental results showed that the electrolyte wetting time of the electrode assembly exceeded the process requirement range by approximately 7.6%.
[0051] In Comparative Example 5, the value of the relation S2 / (S1+S2) was set to 0.65, and the value of the relation (S1+S2) / S3 was set to 0.20. Experimental results showed that the electrolyte wetting time of the electrode assembly exceeded the process requirement range by approximately 8.2%.
[0052] In Comparative Example 6, the value of the relation S2 / (S1+S2) was set to 0.6, and the value of the relation (S1+S2) / S3 was set to 0.55. Experimental verification showed that the electrolyte wetting time of the electrode group met the process requirements, but the deformation of the sinking boss 2 was too large after being squeezed by the electrode group.
[0053] As can be seen from Comparative Examples 4 to 6, when the relationship S2 / (S1+S2) falls within the range of 0.5≤S2 / (S1+S2)≤0.65, but the relationship (S1+S2) / S3 is less than the minimum value of the range of 0.3≤(S1+S2) / S3≤0.5, the electrolyte wetting time of the electrode group exceeds the process requirement range, and the wetting speed is slow. When the relationship (S1+S2) / S3 is greater than the maximum value of the range of 0.3≤(S1+S2) / S3≤0.5, although the electrolyte wetting time of the electrode group meets the process requirements, the deformation of the sinking boss 2 after being squeezed by the electrode group is too large, and the structural strength is poor.
[0054] In summary, when the relation S2 / (S1+S2) satisfies the range of 0.5≤S2 / (S1+S2)≤0.65, and the relation S1+S2) / S3 satisfies the range of 0.3≤(S1+S2) / S3≤0.5, the electrolyte can be rapidly wetted onto the electrode assembly while ensuring structural strength.
[0055] Optionally, such as Figure 2As shown, each second flow guiding structure 22 is either connected to or not connected to the corresponding first flow guiding structure 21. By connecting the second flow guiding structure 22 to the first flow guiding structure 21, when part of the first flow guiding structure 21 is blocked by the electrode assembly and can only be wetted by permeation, the electrolyte accumulated in the first flow guiding structure 21 can be redirected to the second flow guiding structure 22 for injection, thereby ensuring that the electrolyte injection and the rate of wetting the electrode assembly meet the requirements. In other embodiments, when the first flow guiding structure 21 is not blocked by the electrode assembly, the corresponding first flow guiding structures 21 and second flow guiding structures 22 can be disconnected, thereby ensuring that the first flow guiding structure 21 and the second flow guiding structure 22 can independently guide the flow of electrolyte, ensuring that the electrolyte can flow through different areas simultaneously, thereby accelerating the speed of electrolyte wetting of the electrode assembly.
[0056] Optionally, such as Figure 2 , Figure 3 As shown, the recessed boss 2 has a recessed liquid storage tank 25 on the side opposite to the electrode assembly. The first flow guiding structure 21 and the second flow guiding structure 22 are both connected to the liquid storage tank 25. By recessing the liquid storage tank 25 on the side of the recessed boss 2 facing the cover plate body 100, when the electrolyte flow rate from the injection hole 200 of the cover plate body 100 is greater than the electrolyte flow rate from the first flow guiding structure 21 and the second flow guiding structure 22, excess electrolyte can be temporarily stored in the liquid storage tank 25, thereby preventing electrolyte from overflowing from the injection hole 200, which would lead to waste and pollution.
[0057] In this embodiment, the first flow guiding structure 21 and the second flow guiding structure 22, which are interconnected, are L-shaped through-hole structures opened on the wall of the liquid storage tank 25.
[0058] Optionally, such as Figure 2 As shown, the storage tank 25 is also provided with a confluence slope 26. The angle between the confluence slope 26 and the first surface 23 is θ, and satisfies 90°≤θ≤150°. By setting the confluence slope 26 with an angle θ between it and the first surface 23 in the storage tank 25, and ensuring that the angle θ satisfies 90°≤θ≤150°, the electrolyte can be guided by the confluence slope 26 to converge towards the center of the storage tank 25, accelerating the rate at which the electrolyte flows out through the first guide structure 21 and the second guide structure 22. Furthermore, by limiting the range of the angle θ, on the one hand, the angle θ is not too small, which would weaken the confluence function; on the other hand, the angle θ is not too large, which would result in the area where the recessed protrusion 2 below the injection hole 200 contacts the electrode assembly being too small, affecting the effect of pressing and fixing the electrode assembly.
[0059] like Figure 3As shown, this embodiment also provides a battery casing, which includes a cover plate body 100, a casing body, and the aforementioned insulating structural member. The casing body is a hollow shell structure with an opening. The cover plate body 100 is located at the opening of the casing body to form a receiving cavity for accommodating the electrode assembly. The insulating structural member is located inside the receiving cavity and is located on the side of the electrode assembly extending from the tabs. This battery casing, by applying the aforementioned insulating structural member, provides high stability for the electrode assembly while also exhibiting a high electrolyte injection rate.
[0060] In this embodiment, a battery is also provided, comprising an electrode assembly and the aforementioned battery casing, with the electrode assembly housed within the battery casing. By employing the aforementioned battery casing, this battery effectively shortens the time required for electrolyte injection and wetting operations, increases assembly speed, and reduces the production cycle.
[0061] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. An insulating structural member provided in a battery case and located on a side of a tab of an electrode assembly, the battery case including a lid body and a case body, a wall surface of the lid body or the case body opposite to the tab being provided with a liquid injection hole, characterized in that, The insulating structure includes an insulating body and a recessed boss. The recessed boss is disposed on the insulating body and protrudes in the direction close to the electrode group. The recessed boss is disposed opposite to the injection hole and has a first flow guiding structure and a second flow guiding structure communicating with the injection hole. The recessed boss has a first surface disposed opposite to the electrode group and a second surface surrounding the first surface. The first flow guiding structure is used to guide the electrolyte flowing out of the injection hole to flow out of the first surface, and the second flow guiding structure is used to guide the electrolyte flowing out of the injection hole to flow out of the second surface.
2. The insulating structural member according to claim 1, wherein The first flow guiding structure on the sunken protrusion is provided in multiple ways, and the second flow guiding structure corresponds one-to-one with the multiple first flow guiding structures.
3. The insulating structural member according to claim 2, wherein The total flow area of the plurality of first flow guiding structures is S1, and the total flow area of the plurality of second flow guiding structures is S2, and satisfies that 0.5≤S2 / (S1+S2)≤0.
65.
4. The insulating structural member according to claim 3, wherein The sum of the surface areas of the first surface and the second surface is S3, and satisfies 0.3≤(S1+S2) / S3≤0.
5.
5. The insulating structural member according to claim 2, wherein Each of the second flow guiding structures is either connected to or not connected to the corresponding first flow guiding structure.
6. The insulating structural member of claim 1, wherein The recessed protrusion has a liquid storage tank on the side opposite to the electrode assembly, and both the first flow guiding structure and the second flow guiding structure are connected to the liquid storage tank.
7. The insulating structural member according to claim 6, wherein The liquid storage tank is also provided with a confluence slope, and the angle between the confluence slope and the first surface is θ, which satisfies 90°≤θ≤150°.
8. A battery housing, characterized by The battery casing includes a cover plate body, a casing body, and an insulating structural member as described in any one of claims 1-7. The casing body is a hollow shell structure with an opening. The cover plate body is disposed at the opening of the casing body to form a receiving cavity for accommodating the electrode assembly. The insulating structural member is located within the receiving cavity.
9. A battery characterized by The battery includes an electrode assembly and a battery housing as described in claim 8, wherein the electrode assembly is housed within the battery housing.