A battery pack housing, a battery pack, and an electrical device.

Abstract

This utility model discloses a battery pack housing, a battery pack, and an electrical device. The battery pack housing includes a casing and a cover. The casing has a first connecting portion at its open end, and a magnetic field groove is provided on the first connecting portion. The inner and outer walls of the magnetic field groove have opposite magnetic poles facing each other. The magnetic field groove is configured with space for filling with a magnetic fluid and for accommodating a magnetically conductive sheet. The cover has a second connecting portion adapted to the first connecting portion at its connecting end. By providing a magnetic field groove on the first connecting portion, with the inner and outer walls of the groove having opposite magnetic poles facing each other, the battery pack housing allows for filling the magnetic field groove with a magnetic fluid during battery pack production and maintenance, achieving a seal through the magnetic fluid. The battery pack includes this battery pack housing, and the electrical device includes the aforementioned battery pack, achieving the same beneficial effects.

Description

Technical Field

[0001] This utility model relates to the field of battery sealing technology, and in particular to a battery pack shell, a battery pack, and an electrical device. Background Technology

[0002] With advancements in battery technology, electric vehicles and energy storage systems are placing increasingly higher demands on battery performance. Battery sealing technology is one of the key technologies for improving battery performance. A good battery pack seal can prevent moisture, dust, smoke, and other contaminants from entering the battery pack, thus avoiding negative impacts on battery performance and lifespan. This helps maintain a stable internal environment, ensuring the battery operates at its optimal condition and extending its lifespan. Currently, traditional battery packs still use rubber seals. However, rubber seals have drawbacks such as easy expansion, easy dissolution, easy wear from the sealing components, easy contamination of the sealing medium, and easy aging, which can easily compromise the seal and cause the sealing device to lose its sealing performance. Utility Model Content

[0003] Therefore, this utility model provides a battery pack housing, a battery pack, and an electrical device in an attempt to solve or at least alleviate at least one of the above-mentioned problems.

[0004] According to one aspect of this utility model, a battery pack housing is provided, including a casing and a cover. The casing has an open end with a first connecting portion, and a magnetic field groove is provided on the first connecting portion. The inner and outer walls of the magnetic field groove, facing each other, are opposite magnetic poles. The magnetic field groove is configured with space for filling with a magnetic fluid and for accommodating a magnetically conductive sheet. The cover, at its connection end with the casing, has a second connecting portion adapted to the first connecting portion. This battery pack housing, by providing a magnetic field groove on the first connecting portion, with the inner and outer walls of the groove being opposite magnetic poles, allows for the filling of the magnetic field groove with a magnetic fluid during battery pack production and maintenance. The magnetic fluid achieves sealing of the battery pack, forming a stable liquid sealing layer through the magnetic field, resulting in extremely high sealing performance and effectively improving the sealing effect of the battery pack. Furthermore, it helps maintain a stable internal environment of the battery pack, extending the battery's lifespan.

[0005] Optionally, the magnetic conductive sheet is disposed on the second connecting portion, corresponding to and insertable into the magnetic field groove. By disposing the magnetic conductive sheet on the second connecting portion, compared to disposing it on the first connecting portion or disposing it independently, the complexity of the housing structure is reduced and the reliability of the structure is improved.

[0006] Optionally, the magnetic field groove is implemented using an electromagnet. Because an electromagnet is used to implement the magnetic field groove, the strength of the magnetic field in the groove can be adjusted by changing the current in the electrical circuit, thereby adjusting the viscosity of the magnetic fluid and optimizing its sealing performance.

[0007] Optionally, the portion of the outer wall of the magnetic field tank facing the inner wall is the S pole, and the portion of the inner wall facing the outer wall is the N pole. This arrangement of the S and N poles makes the structure simpler and easier to implement compared to other methods.

[0008] Optionally, the magnetic conductive sheet includes a base portion and a tip portion, with one end of the base portion connected to the second connecting portion and the other end connected to the tip portion, and the magnetic conductive sheet perpendicular to the second connecting portion. This magnetic conductive sheet structure design helps to ensure the matching degree between the magnetic conductive sheet and the magnetic field groove.

[0009] Optionally, the height of the magnetic conductive sheet in the direction perpendicular to the second connection is slightly less than the depth of the magnetic field groove. This magnetic conductive sheet structural design, where the height of the magnetic conductive sheet in the direction perpendicular to the second connection is equal to the depth of the magnetic field groove, helps to improve tolerance to manufacturing deviations.

[0010] Optionally, a U-shaped sealing gasket corresponding to the magnetic field groove is provided between the first connecting portion and the second connecting portion, and the U-shaped sealing gasket is disposed on the periphery of the magnetic field groove. By providing this U-shaped sealing gasket, the sealing effect of the magnetic field groove can be enhanced, further ensuring that the medium inside the battery pack is not contaminated.

[0011] Optionally, the first connecting portion and the second connecting portion are connected by a locking assembly. By providing this locking structure, it is beneficial to fix the second connecting portion and the first connecting portion, thereby forming a magnetic fluid sealing structure within the magnetic field groove.

[0012] Optionally, the locking assembly is a bolt structure, with corresponding bolt holes on the first connecting part, the U-shaped sealing gasket, and the second connecting part, which are then fixedly connected by bolts. This bolt-structured locking mechanism facilitates the fixation of the second connecting part and the first connecting part, thereby forming a magnetic fluid seal within the magnetic field groove. Furthermore, this structure is low-cost and highly reliable.

[0013] Another aspect of this utility model provides a battery pack, including a battery module and a battery pack housing as described in any of the preceding claims, wherein the battery module is disposed within the battery pack housing, and the magnetic field groove is filled with a magnetofluid. This battery pack, by employing the aforementioned battery pack housing, possesses the same beneficial effects.

[0014] Another aspect of this invention provides an electrical device that includes the battery pack described above. This electrical device, by employing the aforementioned battery pack, has the same beneficial effects.

[0015] According to the battery pack casing of this utility model, the battery pack can be sealed by magnetic fluid. A stable liquid sealing layer is formed by the action of a magnetic field, which has extremely high sealing performance and can effectively improve the sealing effect of the battery pack. At the same time, since the fluid properties of magnetic fluid have the ability to compensate for strain, it can reduce the wear of the sealing structure. In addition, magnetic fluid has high viscosity and stiffness, which can play a role in shock absorption. Magnetic fluid has strong adhesion in the magnetic circuit, which can effectively prevent moisture, dust, smoke and other pollutants from entering the battery pack and prevent industrial media from being contaminated, thereby avoiding negative impacts on battery performance and lifespan. It helps to maintain the stability of the internal environment of the battery pack and extend the battery's service life. Attached Figure Description

[0016] To achieve the foregoing and related objectives, certain illustrative aspects are described herein in conjunction with the following description and accompanying drawings. These aspects indicate various ways in which the principles disclosed herein may be practiced, and all aspects and their equivalents are intended to fall within the scope of the claimed subject matter. The foregoing and other objectives, features, and advantages of this disclosure will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings. Throughout this disclosure, the same reference numerals generally refer to the same parts or elements.

[0017] Figure 1 This is a first-view structural schematic diagram of a battery pack housing 100 according to an embodiment of the present invention;

[0018] Figure 2 This is a second-view structural schematic diagram of the battery pack housing 100 according to an embodiment of the present invention;

[0019] Figure 3 This is a third-view structural schematic diagram of a battery pack housing 100 according to an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of the cover of the battery pack housing 100 according to an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the battery pack housing 100 according to an embodiment of the present invention;

[0022] Figure label:

[0023] 100. Battery pack casing; 110. Box body; 120. Box cover; 111. First connecting part; 112. Magnetic field groove; 121. Second connecting part; 122. Magnetic conductive sheet; 1121. Outer wall; 1122. Inner wall; 1221. Tongue root; 1222. Tongue tip. Detailed Implementation

[0024] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0025] With advancements in battery technology, especially the increasing performance requirements of electric vehicles and energy storage systems, battery pack sealing technology must also meet higher performance standards. Traditional battery pack sealing methods rely on rubber seals; however, rubber seals suffer from drawbacks such as easy expansion and dissolution, susceptibility to wear from the sealing components, easy contamination of the sealing medium, and rapid aging, leading to a loss of sealing performance. The battery pack housing of this invention effectively avoids these problems.

[0026] According to some embodiments of this utility model, a battery pack housing is provided, which will be described below in conjunction with... Figures 1 to 5 This utility model will now be described.

[0027] like Figures 1 to 3 As shown, a battery pack housing according to an embodiment of the present invention includes a housing 110 and a cover 120. A first connecting portion 111 is provided at the open end of the housing 110 (i.e., the end connected to the cover 120), and a second connecting portion 121 is provided at the end of the cover 120 connected to the housing 110. The housing 110 and the cover 120 are connected and sealed through the first connecting portion 111 and the second connecting portion 121. A magnetic field groove 112 is embedded on the side of the first connecting portion 111 opposite to the second connecting portion 121. The facing portions of the inner wall 1122 and the outer wall 1121 of the magnetic field groove 112 are opposite poles of a magnet, thereby forming a high-intensity magnetic field between the inner wall 1122 and the outer wall 1121. In a specific example of this embodiment, the portion of the outer wall 1122 facing the inner wall 1122 is set as the S pole, and the portion of the inner wall 1121 facing the outer wall 1121 is set as the N pole. In other examples, the magnetic poles can be interchanged. In this embodiment of the invention, the magnetic field groove 112, besides being embedded in the first connecting portion 111, can also be disposed on the first connecting portion 111 in any other feasible manner, and is not limited herein. The first connecting portion 111 can be a structure integrally formed with the housing 110, or it can be an independent structure disposed on the housing 110 by welding or other means, and is not limited herein. The second connecting portion 121 can be a structure integrally formed with the lid 120, or it can be an independent structure disposed on the lid 120 by welding or other means, and is not limited herein.

[0028] In a specific example, the inner wall 1122 of the magnetic field groove is a first magnet, and the outer wall 1121 is a second magnet. The second magnet is fitted around the first magnet and has the same thickness as the first magnet. In this implementation of the magnetic field groove, since the magnetic field groove is realized using two independent magnets, the structure has the characteristics of simple structure and high reliability. In this utility model, the magnetic field groove can also be implemented in other ways, which are not limited here.

[0029] In this embodiment of the invention, the magnetic field groove 112 can be as follows: Figure 5 The spiral groove shown can also be set as a rectangular groove, a circular groove, a crescent-shaped groove, or other various feasible shapes, and is not limited here.

[0030] like Figure 2 , Figure 3 As shown, the side of the second connecting part 121 opposite to the first connecting part 111 is provided with a magnetic conductive plate 122 that matches the magnetic field groove 112 and can be inserted into the magnetic field groove 112. Further, the magnetic conductive plate 122 includes a tongue root 1221 and a tongue tip 1222. The tongue root 1221 is fixedly connected to the second connecting part 121, and the magnetic conductive plate 122 is perpendicularly connected to the second connecting part 121. When the lid 120 covers the box body 110, the second connecting part 121 fits against the first connecting part 111, and the magnetic field groove 112 is covered to form a sealed space. The magnetic field groove can be filled with a magnetic fluid (not shown in the figure). Under the action of a high-intensity magnetic field formed between the inner wall 1122 and the outer wall 1121 of the magnetic field groove 112, the magnetic fluid changes from a flowing state to a near-solid state similar to a "non-Newtonian fluid." The magnetic fluid itself possesses the basic properties of a liquid fluid. When the magnetic fluid is injected into the magnetic field gap, it is bound and evenly distributed due to magnetic action, forming a dense liquid sealing ring. The stable presence of this sealing ring provides excellent sealing for the internal environment of the battery pack, preventing moisture, dust, gas, and other external substances from entering. Due to the liquid properties of the magnetohydrodynamic fluid, it possesses a certain degree of compensability in response to changes in external forces, resulting in stronger wear resistance and shock absorption, ensuring stable internal pressure and cell safety within the battery pack.

[0031] Magnetofluids are an existing type of functional material. They typically consist of nanoscale magnetic particles, surfactants (or stabilizers), and a carrier liquid (usually an organic solvent or water). Under the influence of a magnetic field, the magnetic particles in a magnetofluid can form chain-like structures, exhibiting unique rheological properties and magnetic responses. Magnetofluids have no magnetic attraction when static; they only exhibit magnetism when an external magnetic field is applied. The magnetofluid in this embodiment can be any existing type. In the prior art, magnetofluids are typically prepared via chemical co-precipitation, by adding a suitable precipitant to a mixed salt solution containing two or more metal ions, reacting to generate a homogeneous precipitate. For example, adding NaOH to a mixed solution of FeCl2 and FeCl3 can generate Fe3O4 precipitate, thus forming a magnetofluid. In the aforementioned scheme using a mixed solution of FeCl2 and FeCl3 to prepare the magnetofluid, after demagnetization, the magnetofluid reverts to a liquid state, its main component being iron oxide, which does not cause pollution.

[0032] In a specific example of this embodiment, the magnetic field groove 112 can be implemented by a permanent magnet. The permanent magnet has a long magnetic pole life, which can greatly improve the sealing life.

[0033] According to one embodiment of this utility model, the magnetic field groove 112 is implemented by an electromagnet, with two magnetic poles connected to an electrical circuit. Since the magnetic field groove 112 is implemented by an electromagnet, the strength of the magnetic field in the magnetic field groove 112 can be adjusted by changing the current in the electrical circuit, thereby adjusting the viscosity of the magnetic fluid and optimizing its sealing performance.

[0034] In some embodiments of this utility model, the magnetic conductive sheet 122 can be disposed on the first connecting part 111, or it can be an independent component that is not connected to either the first connecting part 111 or the second connecting part 121.

[0035] Furthermore, a U-shaped sealing gasket (not shown in the figure) corresponding to the magnetic field groove is provided between the first connecting part 111 and the second connecting part 121. The U-shaped sealing gasket is disposed on the periphery of the magnetic field groove. By providing this U-shaped sealing gasket, the sealing effect of the magnetic field groove 112 can be enhanced, further ensuring that the medium inside the battery pack is not contaminated.

[0036] Furthermore, the first connecting part 111 and the second connecting part 121 are connected by a locking assembly (not shown in the figure). By providing this locking structure, it is beneficial to fix the second connecting part and the first connecting part, thereby forming a magnetic fluid sealing structure within the magnetic field groove.

[0037] For example, the locking assembly can be a bolt structure, with corresponding bolt holes on the first connecting portion 111 and the second connecting portion 121. The bolt passes through the second connecting portion, the annular sealing gasket, and the first connecting portion in sequence, and is tightened by a nut. This locking structure helps to fix the second connecting portion, the annular sealing gasket, and the first connecting portion, thereby forming a magnetic fluid seal within the magnetic field groove. In other embodiments, the locking assembly can be implemented using a snap-fit ​​or other methods.

[0038] According to the battery pack housing of this utility model, a magnetic field groove is provided on the first connecting part. The inner and outer walls of the magnetic field groove have opposite magnetic poles facing each other. During battery pack production and maintenance, the magnetic field groove is filled with a magnetic fluid, which achieves battery pack sealing. A stable liquid sealing layer is formed by the magnetic field, which has extremely high sealing performance and can effectively improve the sealing effect of the battery pack. In addition, since the fluid properties of the magnetic fluid have the ability to compensate for strain, it can reduce the wear of the sealing structure. The magnetic fluid also has high viscosity and stiffness, which can play a shock absorption role. The magnetic fluid has strong adhesion in the magnetic circuit, which effectively prevents moisture, dust, smoke and other pollutants from entering the battery pack, preventing industrial media from being contaminated, thereby avoiding negative impacts on battery performance and lifespan, helping to maintain the stability of the internal environment of the battery pack and extending the battery's service life.

[0039] According to another aspect of this utility model, a battery pack is provided, including a battery module and a battery pack housing as described in any of the preceding claims, wherein the battery module is disposed within the battery pack housing, and the magnetic field groove is filled with a magnetofluid. This battery pack has the same beneficial effects as the aforementioned battery pack housing.

[0040] According to another aspect of the present invention, an electrical device is provided, including the aforementioned battery pack. Thus, the electrical device possesses all the features and advantages of the aforementioned battery pack, which will not be repeated here.

[0041] The aforementioned battery pack can be used as a power source for the electrical device, or as an energy storage unit for the electrical device. The electrical device may include, but is not limited to, mobile devices (such as mobile phones, tablets, laptops, etc.), electric vehicles (such as pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric trucks, electric forklifts, etc.), ships, energy storage systems, etc.

[0042] In the description of the embodiments of this utility model, it should be understood that the terms "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, 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.

[0043] It should be understood that expressions such as "comprising" and "may include" used in this invention indicate the presence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this invention, terms such as "comprising" and / or "having" are to be interpreted as indicating a particular characteristic, number, operation, constituent element, component, or combination thereof, but not to exclude the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0044] In this embodiment of the invention, expressions including ordinal numbers such as "first" and "second" may modify the elements. However, such elements are not limited by the above expressions. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used to distinguish one element from other elements.

[0045] In this embodiment of the invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this embodiment of the invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0046] In the description of the embodiments of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0047] In the description of the embodiments of this utility model, when a component is referred to as "connected" or "accessed" to other components, it should be understood that the component is not only directly connected to or accessed to other components, but also that another component may exist between the component and other components. On the other hand, when a component is referred to as "directly connected" or "directly accessed" to other components, it should be understood that there is no component between them. When a component is referred to as "actively connected" to other components, it means that the positional relationship between the component and other components is variable, such as the relationship between a slide rail and a slider, where the slider can slide on the slide rail, and the slide rail and the track are actively connected. When a component is referred to as "fixedly connected" to other components, it means that the positional relationship between the component and other components after assembly is relatively fixed.

[0048] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of this invention and form different embodiments.

[0049] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Although this utility model has been described with reference to a limited number of embodiments, those skilled in the art will understand from the above description that other embodiments can be conceived within the scope of this utility model described herein. Furthermore, it should be noted that the language used in this specification has been chosen primarily for readability and instructional purposes, and not for interpreting or limiting the subject matter of this utility model. Therefore, many modifications and alterations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. Regarding the scope of this utility model, the disclosure made herein is illustrative and not restrictive, and the protection scope of this patent application shall be determined by the scope of the claims.

Claims

1. A battery pack housing, characterized in that, Includes the box body and the box lid, among which, The box body has a first connecting part at the opening end, and a magnetic field groove is provided on the first connecting part. The inner and outer walls of the magnetic field groove face each other and are opposite magnetic poles. The magnetic field groove is configured with space for filling magnetic fluid and for accommodating magnetic conductive sheets. The connection end between the lid and the body is provided with a second connection part that is adapted to the first connection part.

2. The battery pack housing as described in claim 1, characterized in that, The magnetic conductive sheet is disposed on the second connecting part, corresponds to the magnetic field groove, and can be inserted into the magnetic field groove.

3. The battery pack housing as described in claim 1, characterized in that, The magnetic field slot is achieved by an electromagnet; And / or, the portion of the outer wall of the magnetic field groove facing the inner wall is the S pole, and the portion of the inner wall facing the outer wall is the N pole.

4. The battery pack housing as described in claim 2, characterized in that, The magnetic conductive sheet includes a base of the tongue and a tip of the tongue. One end of the base of the tongue is connected to the second connecting part, and the other end is connected to the tip of the tongue. The magnetic conductive sheet is perpendicular to the second connecting part.

5. The battery pack housing as described in claim 2, characterized in that, The height of the magnetic conductive sheet in the direction perpendicular to the second connection portion is less than the depth of the magnetic field groove.

6. The battery pack housing as described in any one of claims 1-5, characterized in that, A spiral-shaped sealing gasket corresponding to the magnetic field groove is provided between the first connecting part and the second connecting part, and the spiral-shaped sealing gasket is disposed on the periphery of the magnetic field groove.

7. The battery pack housing as described in claim 6, characterized in that, The first connecting part and the second connecting part are connected by a locking component.

8. The battery pack housing as described in claim 7, characterized in that, The locking assembly is a bolt structure, and the first connecting part, the U-shaped sealing gasket and the second connecting part are provided with corresponding bolt connection holes. The first connecting part, the U-shaped sealing gasket and the second connecting part are fixedly connected by bolts through the bolt connection holes.

9. A battery pack, characterized in that, include: The battery module and the battery pack housing as described in any one of claims 1-8, wherein the battery module is disposed within the battery pack housing, and the magnetic field groove is filled with a magnetic fluid.

10. An electrical appliance, characterized in that, Includes the battery pack as described in claim 9.

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