Battery shell, battery and electronic equipment
By setting a transparent substrate on the lithium-ion battery shell to observe the electrolyte level, the problems of long electrolyte injection volume design cycle and low accuracy are solved, and the visualization and accurate evaluation of the electrolyte content are achieved.
Patent Information
- Application Number
- CN202422323930.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-20
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-09-20
AI Technical Summary
The design cycle of electrolyte injection volume in existing lithium-ion batteries is too long, and the judgment accuracy is low, making it impossible to monitor the electrolyte content in real time.
A battery casing is designed with a transparent substrate covering the opening, allowing direct observation of the electrolyte level. The transparent substrate can be glass or PET and is provided with a scale bar for accurate measurement of the liquid level.
It realizes the visualization of electrolyte content, simplifies the production of battery shell, predicts the adequacy of electrolyte in advance, provides an accurate reference for the electrolyte injection amount, and shortens the design cycle.
Smart Images
Figure CN223378241U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of lithium-ion battery manufacturing, and in particular to a battery casing and a battery. Background Art
[0002] The electrolyte in a lithium-ion battery acts like "blood," conducting lithium ions between the positive and negative electrodes. Insufficient electrolyte can directly impact many of the battery's performance, particularly cycling performance. In the pursuit of increasing energy density and reducing costs, the amount of electrolyte required in lithium-ion batteries is constantly being adjusted. Researchers need to design the optimal electrolyte dosage. Currently, comparative experiments with different electrolyte injection volumes, combined with electrical performance testing, provide a rough estimate of the electrolyte's usable range.
[0003] However, the current design cycle for the electrolyte injection amount in batteries is too long, and the accuracy of determining the electrolyte injection amount is low. Utility Model Content
[0004] The present application provides a battery housing, a battery, and an electronic device, which can monitor the electrolyte content of a lithium-ion battery in real time, and the battery housing is simple to manufacture and easy to use.
[0005] In order to achieve the above objectives, this application provides the following technical solutions:
[0006] A first aspect of the present application provides a battery housing, comprising:
[0007] A first shell has a receiving cavity, and a first opening is provided on a side surface of the first shell along its thickness direction;
[0008] A transparent substrate is connected to the first shell and covers the first opening, and the liquid level of the electrolyte in the accommodating cavity can be observed through the transparent substrate.
[0009] In a possible implementation, along a thickness direction of the first shell, the first shell has a first side surface and a second side surface opposite to each other, the first side surface is provided with the first opening, and / or the second side surface is provided with the first opening.
[0010] In a possible implementation, the length of the first opening is one third to two thirds of the length of the first side surface.
[0011] In a possible implementation, a distance between an edge of the transparent substrate and an edge of the first opening is 2.5-3 mm.
[0012] In a possible implementation manner, the transparent substrate is fixedly connected to the outer wall of the first shell.
[0013] In a possible implementation, the transparent substrate is adhered to an outer wall of the first shell.
[0014] In a possible implementation, the transparent substrate is a glass substrate.
[0015] In a possible implementation, the glass substrate is welded to the outer wall of the first shell.
[0016] In a possible implementation, a scale bar is provided on the transparent substrate.
[0017] The battery housing provided in the first aspect of the present application has at least the following beneficial effects:
[0018] The battery case includes a first shell provided with a first opening. The content of electrolyte inside the lithium-ion battery can be directly observed through a transparent substrate covering the first opening. The structure of the battery case is simple and easy to manufacture. At the same time, the visualization of the electrolyte content is achieved, and whether the electrolyte content is sufficient can be predicted in advance. An assessment can be made in time at the front end of battery production, providing a good reference basis for the electrolyte injection amount in the research and development of lithium-ion batteries.
[0019] A second aspect of the present application provides a battery, comprising a battery coil and a battery shell provided by any of the above technical solutions.
[0020] A third aspect of the present application provides an electronic device, comprising the battery housing provided by any technical solution of the first aspect or the battery provided by the second aspect.
[0021] The batteries and electronic devices provided in the second and third aspects of the present application have all the beneficial effects of the battery housing provided in the first aspect of the present application, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.
[0023] Figure 1 A front view of the battery housing provided in an embodiment of the present application;
[0024] Figure 2 A top view of a battery housing provided in an embodiment of the present application;
[0025] Figure 3 A side view of a battery housing provided in an embodiment of the present application.
[0026] Description of reference numerals:
[0027] 100. First shell;
[0028] 110. Accommodation cavity;
[0029] 120. First opening;
[0030] 130, first side;
[0031] 140, second side;
[0032] 200. Transparent substrate;
[0033] 210. Scale bar.
[0034] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION
[0035] As described in the background, the electrolyte in a lithium-ion battery acts like "blood," conducting lithium ions between the positive and negative electrodes. Insufficient electrolyte can directly affect many of the battery's performance characteristics, particularly cycling performance. In the pursuit of increasing energy density and reducing costs, the amount of electrolyte required in lithium-ion batteries is constantly being adjusted. Researchers need to design the optimal electrolyte dosage. Currently, comparative experiments with different electrolyte injection volumes, combined with electrical performance testing, provide a rough estimate of the electrolyte's usage range.
[0036] However, the current design cycle for the electrolyte injection amount in batteries is too long, and the accuracy of determining the electrolyte injection amount is low.
[0037] The inventors have found that the main reason for this problem is that after the existing battery is assembled, personnel cannot monitor the electrolyte content inside the battery through the battery casing from the outside.
[0038] In response to the above technical problems, an embodiment of the present application provides a battery case, which includes a first case having a first opening. The content of the electrolyte inside the lithium-ion battery can be directly observed through a transparent substrate covering the first opening. The structure of the battery case is simple and easy to manufacture. At the same time, the visualization of the electrolyte content is achieved, and whether the electrolyte content is sufficient can be predicted in advance. An assessment can be made in time at the front end of battery production, providing a good reference basis for the design of the electrolyte injection amount in the research and development of lithium-ion batteries.
[0039] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and easy to understand, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.
[0040] refer to Figures 1 to 3 The battery case provided in the embodiment of the present application includes a first shell 100 having a accommodating cavity 110, and the first shell 100 is provided with a first opening 120 along the side of its own thickness direction; a transparent substrate 200 is connected to the first shell 100 and covers the first opening 120, and the liquid level of the electrolyte in the accommodating cavity 110 can be observed through the transparent substrate 200.
[0041] In this way, the content of the electrolyte inside the lithium-ion battery can be directly observed through the transparent substrate 200 covering the first opening 120. The structure of the battery shell is simple and easy to manufacture. At the same time, the visualization of the electrolyte content is achieved, and whether the electrolyte content is sufficient can be predicted in advance. An assessment can be made in time at the front end of battery production, providing a good reference basis for the electrolyte injection amount in the research and development of lithium-ion batteries.
[0042] Illustratively, the first shell 100 is made of aluminum, which is a common material for lithium-ion battery shells. Furthermore, the first shell 100 is square in shape.
[0043] In some embodiments, along the thickness direction of the first shell 100 , the first shell 100 has a first side surface 130 and a second side surface 140 opposite to each other, the first side surface 130 is provided with a first opening 120 , and / or the second side surface 140 is provided with a first opening 120 .
[0044] Exemplarily, the first side surface 130 is provided with a first opening 120, and the transparent substrate 200 covers the first opening 120 of the first side surface 130; alternatively, the second side surface 140 is provided with a first opening 120, and the transparent substrate 200 covers the first opening 120 of the second side surface 140; alternatively, both the first side surface 130 and the second side surface 140 are provided with a first opening 120, and there are two transparent substrates 200, and the two transparent substrates 200 respectively cover the first opening 120 of the first side surface 130 and the first opening 120 of the second side surface 140.
[0045] In this way, the internal visualization performance of the battery housing is enhanced, and the monitoring needs of the electrolyte in the accommodating cavity 110 of the battery housing by the staff in different scenarios can be met by flexibly adjusting the layout of the first opening 120.
[0046] In some embodiments, the length of the first opening 120 is one-third to two-thirds of the length of the first side 130 , for example, the length of the first opening 120 is one-third of the length of the first side 130 , or the length of the first opening 120 is two-thirds of the length of the first side 130 .
[0047] Such a design ensures visualization of the electrolyte in the accommodating cavity 110 while preventing the opening of the first shell 100 from being too large, which would cause greater processing difficulty and a high probability of liquid leakage in the first shell 100 .
[0048] Furthermore, along the height direction of the first shell 100, the first opening 120 has a first bottom edge close to the bottom of the first shell 100, and the distance between the first bottom edge and the bottom of the first shell 100 is 3-7 mm. For example, the distance between the first bottom edge and the bottom of the first shell 100 is 3 mm, or the distance between the first bottom edge and the bottom of the first shell 100 is 5 mm, or the distance between the first bottom edge and the bottom of the first shell 100 is 7 mm.
[0049] Along a direction perpendicular to the first bottom edge, the first opening 120 has a first side edge and a second side edge relative to each other, and the distance between the first side edge and the second side edge and the side edge of the first shell 100 is 3-7 mm. For example, the distance between the first side edge and the second side edge and the side edge of the first shell 100 is 3 mm, or the distance between the first side edge and the second side edge and the side edge of the first shell 100 is 5 mm, or the distance between the first side edge and the second side edge and the side edge of the first shell 100 is 7 mm.
[0050] With this arrangement, the processing of the first opening 120 is simple and convenient, while ensuring a good visualization effect of the interior of the first shell 100.
[0051] In some embodiments, the distance between the edge of the transparent substrate 200 and the edge of the first opening 120 is 2.5-3 mm. Exemplarily, the distance between the edge of the transparent substrate 200 and the edge of the first opening 120 is 2.5 mm, or the distance between the edge of the transparent substrate 200 and the edge of the first opening 120 is 2.8 mm, or the distance between the edge of the transparent substrate 200 and the edge of the first opening 120 is 3 mm.
[0052] In this way, through the reasonable assembly dimension design between the transparent substrate 200 and the first opening 120 , the transparent substrate 200 can be stably connected to the outer wall of the first shell 100 without wasting too much cover material.
[0053] In some embodiments, the transparent substrate 200 is fixedly connected to the outer wall of the first housing 100 .
[0054] In some embodiments, the transparent substrate 200 is bonded to the outer wall of the first shell 100. For example, a glue layer is provided between the transparent substrate 200 and the outer wall of the first shell 100. For example, the glue in the glue layer is AB glue, that is, the transparent substrate 200 is bonded to the outer wall of the first shell 100 by AB glue.
[0055] It should be noted that AB glue refers to a two-component epoxy resin adhesive consisting of two main components: component A (usually a resin) and component B (usually a hardener). After mixing, these two components will undergo a chemical reaction and solidify into a hard solid substance that can be used to bond materials.
[0056] In some embodiments, the transparent substrate 200 is a PET transparent substrate. In this way, the PET transparent substrate covers the first opening 120, which can provide good sealing and prevent external pollutants such as moisture and dust from entering the interior of the battery. Moreover, PET, as a good insulating material, can avoid the risk of short circuit between the internal circuit of the battery and external objects.
[0057] In some embodiments, a scale bar 210 is provided on the transparent substrate 200. For example, the transparent substrate 200 is a PET substrate, and the scale bar 210 can be set on the glass cover by screen printing or pasting scale values. In this way, the liquid level of the electrolyte injected into the accommodating cavity 110 of the first shell 100 can be accurately measured.
[0058] In a second aspect, an embodiment of the present application provides a battery, which includes a battery roll core and a battery housing provided by any embodiment of the first aspect.
[0059] It is understood that the battery in the embodiment of the present application can be a lithium-ion battery, wherein the order of assembly can be adjusted according to the battery manufacturing process. For example, the prepared wound core or stacked core is first assembled directly onto the aluminum first shell 100 having the first opening 120 after the cover plate is welded, thereby obtaining a lithium-ion battery. Then, the prepared PET transparent substrate with scale bars 210 is bonded to the first opening 120 of the first shell 100 using AB glue. This results in a lithium-ion battery with a transparent viewing window on the side, allowing the electrolyte content inside the battery to be directly observed during subsequent electrolyte injection.
[0060] In a third aspect, an embodiment of the present application provides an electronic device, which includes a battery housing provided by any embodiment of the first aspect or a battery provided by an embodiment of the second aspect. The electronic device can be a mobile phone, a tablet computer, a desktop computer, a laptop computer, an electric vehicle, or an electric aircraft.
[0061] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.
[0062] 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.
[0063] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.
[0064] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.
[0065] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.
[0066] It should be noted that phrases such as "one embodiment," "an embodiment," "exemplary embodiments," and "some embodiments" in this specification may indicate embodiments that may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes that particular feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Furthermore, when a particular feature, structure, or characteristic is described in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not.
[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims
1. A battery housing, characterized in that: include: A first shell (100) has a receiving cavity (110), and a first opening (120) is provided on a side surface of the first shell (100) along its thickness direction; A transparent substrate (200) is connected to the first shell (100) and covers the first opening (120). The liquid level of the electrolyte in the accommodating cavity (110) can be observed through the transparent substrate (200).
2. The battery case according to claim 1, wherein: Along the thickness direction of the first shell (100), the first shell (100) has a first side surface (130) and a second side surface (140) opposite to each other, the first side surface (130) is provided with the first opening (120), and / or the second side surface (140) is provided with the first opening (120).
3. The battery case according to claim 2, characterized in that The length of the first opening (120) is one third to two thirds of the length of the first side surface (130).
4. The battery case according to claim 1, wherein: The distance between the edge of the transparent substrate (200) and the edge of the first opening (120) is 2.5-3 mm.
5. The battery housing according to any one of claims 1 to 4, characterized in that: The transparent substrate (200) is fixedly connected to the outer wall of the first shell (100).
6. The battery case according to claim 5, characterized in that The transparent substrate (200) is bonded to the outer wall of the first shell (100).
7. The battery case according to claim 5, characterized in that The transparent substrate (200) is a PET transparent substrate.
8. The battery casing according to any one of claims 1 to 4, characterized in that: A scale bar (210) is provided on the transparent substrate (200).
9. A battery, characterized in that: The invention comprises a battery coil core and the battery casing according to any one of claims 1 to 8.
10. An electronic device, characterized in that: The invention comprises the battery casing according to any one of claims 1 to 8 or the battery according to claim 9.