Battery module, battery pack and electric device

Abstract

The utility model relates to battery technology field especially relates to a kind of battery module, battery pack and electric equipment.The battery module includes shell, electric core unit, grouting adhesive and flow guide enhancement component. Among them, electric core unit is arranged in shell, and electric core unit includes multiple rows of electric cores arranged along the first direction, and the electric core of adjacent two rows is set to stagger along the second direction, and there is gap between the electric core of adjacent two rows;First direction and second direction are perpendicular to each other.Grouting adhesive is filled in gap.Flow guide enhancement component is set in gap, and flow guide enhancement component is configured to flow guide grouting adhesive.The battery module can improve the flow performance of grouting adhesive between electric core, improve the sealing property and structural stability of battery module.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a battery module, battery pack and electrical equipment. Background Technology

[0002] With the continuous development of lithium-ion battery technology, cylindrical batteries have been widely used due to their excellent performance and high energy density. In the assembly process of cylindrical batteries, the application of potting compound between cells is crucial. It not only serves as insulation and sealing but also enhances the overall structural stability of the battery module.

[0003] In existing technologies, as the energy density of battery modules gradually increases, the gaps between cells become smaller. During the potting process, the flow resistance of the potting compound between adjacent cells is high, resulting in poor flow performance and difficulty in quickly and uniformly filling the gaps. This leads to incomplete potting, affecting the sealing performance and structural stability of the battery module. Furthermore, the potting compound is susceptible to increased surface tension in small-gap environments, further reducing its flowability and making it difficult to achieve good filling results in these gaps, thus impacting the quality and performance of the battery module.

[0004] Therefore, there is an urgent need to design a battery module, battery pack, and electrical equipment to solve the above technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a battery module, battery pack, and electrical equipment that improves the flow performance of potting compound between battery cells and enhances the sealing performance and structural stability of the battery module.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] On the one hand, this utility model provides a battery module, including:

[0008] case;

[0009] A battery cell unit is disposed within the housing. The battery cell unit includes multiple rows of battery cells arranged along a first direction, with adjacent rows of battery cells staggered along a second direction and gaps between adjacent rows of battery cells; the first direction and the second direction are perpendicular to each other.

[0010] A potting compound, which fills the gap;

[0011] A flow-guiding enhancement component is disposed within the gap and configured to guide the flow of the potting compound.

[0012] As an optional technical solution for battery modules, the current guiding enhancement component includes a first current guiding member, a second current guiding member, and a connector. The connector includes two end faces that are arranged opposite to each other. The first current guiding member is connected to one of the end faces, and the second current guiding member is connected to the other end face.

[0013] As an optional technical solution for a battery module, the connector includes a first connecting portion and a second connecting portion. The first connecting portion and the second connecting portion are connected to form a bent structure. In two adjacent rows of battery cells, the first connecting portion forms a first accommodating space on the side facing one row of battery cells, and the second connecting portion forms a second accommodating space on the side facing the other row of battery cells. The first current guide is disposed in the first accommodating space and is coplanar with the second connecting portion in a third-direction plane. The second current guide is disposed in the second accommodating space and is coplanar with the first connecting portion in a third-direction plane. The third-direction plane is perpendicular to both the first direction and the second direction.

[0014] As an optional technical solution for a battery module, the first flow guide, the second flow guide, the first connecting part, and the second connecting part are all configured in multiples, with the first flow guide corresponding to the first connecting part and the second flow guide corresponding to the second connecting part; and the first flow guide and the second flow guide are spaced apart, and the first connecting part and the second connecting part are spaced apart.

[0015] As an optional technical solution for battery modules, both the first and second flow guides are wave-shaped.

[0016] As an optional technical solution for the battery module, the battery module also includes an adhesive component, through which the current-enhancing component is fixed to at least one row of the battery cells.

[0017] As an optional technical solution for battery modules, along a third direction, the height of the current-enhancing component is not lower than the potting leveling height of the potting compound; or, the height of the current-enhancing component is flush with the height of the battery cell.

[0018] As an optional technical solution for battery modules, the current-enhancing component is one of glass fiber, carbon fiber, and aramid fiber.

[0019] On the other hand, the present invention also provides a battery pack, the battery pack including a housing, a busbar assembly and the battery modules described above, wherein multiple battery modules are configured, and all multiple battery modules are disposed in the housing, and the busbar assembly is electrically connected to two adjacent battery modules.

[0020] In another aspect, the present invention also provides an electrical device, which includes a load and the battery pack described above, wherein the load is electrically connected to the battery pack, and the battery pack is used to provide electrical energy to the load.

[0021] The beneficial effects of this utility model include at least the following:

[0022] This invention provides a battery module, comprising a housing, battery cell units, potting compound, and a current-enhancing component. The battery cell units are disposed within the housing and include multiple rows of cells arranged along a first direction. Adjacent rows of cells are staggered along a second direction, with gaps between adjacent rows. The first and second directions are perpendicular to each other. The potting compound fills the gaps. The current-enhancing component is disposed within the gaps and configured to guide the flow of the potting compound.

[0023] In summary, when injecting potting compound into the battery module, the flow-enhancing component in this invention guides the potting compound, reducing resistance in its flow direction. Simultaneously, the presence of the flow-enhancing component disrupts the surface tension of the potting compound within the gaps, reducing flow resistance and allowing the potting compound to diffuse more easily into the gaps between staggered battery cells, preventing localized accumulation or gaps, improving the uniformity of the potting compound filling, and thus enhancing the sealing performance of the battery module. Furthermore, after the potting compound foams and cures, the flow-enhancing component and the potting compound form a composite structure, thereby strengthening the structural strength of the battery module, reducing relative displacement of the battery cells due to vibration or impact, and improving the stability and reliability of the battery module.

[0024] This utility model also provides a battery pack with high structural stability and improved battery pack performance.

[0025] This utility model also provides an electrical device that has high structural stability, can extend its service life, and improve safety performance. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0027] Figure 1 This is an exploded view of the battery pack provided in this embodiment of the utility model;

[0028] Figure 2 This is a schematic diagram of the structure of the battery cell unit and the current-enhancing component provided in this embodiment of the utility model;

[0029] Figure 3 This is a top view of the battery cell unit and current-enhancing component provided in this embodiment of the utility model;

[0030] Figure 4 This is a schematic diagram of the flow-enhancing component provided in this embodiment of the utility model;

[0031] Figure 5 This is an exploded view of the flow-enhancing component provided in this embodiment of the utility model;

[0032] Figure 6 yes Figure 5 A magnified view of a section at point A in the middle;

[0033] Figure 7 This is a schematic diagram of the flow of the potting compound provided in this embodiment of the utility model at the flow enhancement component.

[0034] Figure Labels

[0035] 10. Housing; 20. Battery cell; 30. Current guiding enhancement component; 31. First current guiding component; 32. Second current guiding component; 33. Connector; 331. First connecting part; 332. Second connecting part; 333. First accommodating space; 334. Second accommodating space; 40. Potting compound. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0039] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for 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. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0040] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0041] 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.

[0042] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0043] This embodiment provides a battery module that can improve the flow performance of potting compound between battery cells, thereby enhancing the sealing performance and structural stability of the battery module.

[0044] like Figures 1-7As shown, the battery module mainly includes a housing 10, a cell unit, a potting compound 40, and a current-enhancing component 30. The cell unit is disposed within the housing 10 and includes multiple rows of cells 20 arranged along a first direction. Adjacent rows of cells 20 are staggered along a second direction, and gaps exist between adjacent rows of cells 20; the first and second directions are perpendicular to each other. The potting compound 40 fills the gaps. The current-enhancing component 30 is disposed within the gaps and is configured to guide the flow of the potting compound 40. The first direction is... Figure 2 The X-axis direction, the second direction is Figure 2 The Y-axis direction in the diagram.

[0045] Based on the above design, when injecting potting compound into the battery module, the flow-enhancing component 30 in this embodiment can guide the potting compound 40, reducing the resistance to its flow. Simultaneously, the presence of the flow-enhancing component 30 disrupts the surface tension formed by the potting compound 40 in the gaps, reducing flow resistance and making it easier for the potting compound 40 to diffuse in the gaps between the staggered battery cells 20, avoiding local accumulation or gaps, improving the uniformity of the potting compound 40 filling, and thus improving the sealing performance of the battery module. Furthermore, after the potting compound 40 foams and cures, the flow-enhancing component 30 and the potting compound 40 form a composite structure, thereby enhancing the structural strength of the battery module, reducing the relative displacement of the battery cells 20 caused by vibration or impact, and improving the stability and reliability of the battery module.

[0046] In some optional embodiments, the battery cell unit can be 2-5 rows of battery cells 20, with each row containing 10-20 cells. The stagger distance between two adjacent rows of battery cells 20 is half the diameter of the battery cell 20. The gap between two adjacent rows of battery cells 20 is 1.5mm-2.0mm.

[0047] The flow-guiding and reinforcing component 30 is one of glass fiber, carbon fiber, and aramid fiber.

[0048] Specifically, for example, the flow enhancement component 30 is made of glass fiber, which is low in cost, has good chemical resistance, and is suitable for mass production. Its surface roughness is moderate, which can effectively break the surface tension of the potting compound 40. At the same time, it has good compatibility with the potting compound 40 and is not prone to chemical reaction.

[0049] For example, the flow enhancement component 30 is made of carbon fiber, which is high in strength and light in weight. It can provide a higher structural reinforcement effect at the same thickness, making it suitable for weight-sensitive devices (such as electric vehicles). It also has moderate thermal conductivity and does not affect the heat dissipation of the battery cell 20.

[0050] For example, the current-enhancing component 30 is made of aramid fiber, which has excellent high temperature resistance and is suitable for high-power battery modules. It also has good toughness and can adapt to the slight expansion and deformation of the cell 20.

[0051] like Figures 4-6 As shown, in this embodiment, the flow enhancement component 30 includes a first flow guide 31, a second flow guide 32, and a connector 33. The connector 33 includes two end faces that are disposed opposite to each other. The first flow guide 31 is connected to one of the end faces, and the second flow guide 32 is connected to the other end face.

[0052] The gaps between the staggered battery cells 20 are formed by the sides of two adjacent rows of battery cells 20, with each side of the gap corresponding to a different row of battery cells 20. The first flow guide 31 and the second flow guide 32 can respectively guide the flow through the side gaps of the two adjacent rows of battery cells 20. The connector 33 fixes the first flow guide 31 and the second flow guide 32 as a whole, ensuring that their relative positions in the gap are stable and preventing the first flow guide 31 and / or the second flow guide 32 from shifting due to the flow impact of the potting compound 40, thereby improving the coordination of flow guidance.

[0053] In some optional embodiments, the connector 33 is a thin sheet with a thickness of 0.3mm-0.5mm, and the two end faces are respectively provided with slots; the first guide 31 and the second guide 32 are fiber strips, which are inserted into the corresponding slots and fixed by heat fusion.

[0054] like Figures 4-6 As shown, in this embodiment, the connector 33 includes a first connecting portion 331 and a second connecting portion 332. The first connecting portion 331 and the second connecting portion 332 are connected to form a bent structure. In two adjacent rows of cells 20, the first connecting portion 331 forms a first accommodating space 333 facing one row of cells 20, and the second connecting portion 332 forms a second accommodating space 334 facing the other row of cells 20. The first guide member 31 is disposed in the first accommodating space 333 and is coplanar with the second connecting portion 332 in the plane of the third direction, that is, the first guide member 31 and the second connecting portion 332 are coplanar in the vertical plane. The second guide member 32 is disposed in the second accommodating space 334 and is coplanar with the first connecting portion 331 in the plane of the third direction, that is, the second guide member 32 and the first connecting portion 331 are coplanar in the vertical plane. The third direction is perpendicular to both the first and second directions. Figure 2 The Z-axis direction in the equation.

[0055] The gaps between the staggered battery cells 20 can easily form "dead corners" at the corners, making it difficult for the potting compound 40 to flow in. The bent connector 33 can adapt to the corner shape of the gaps. The first connector 331 and the second connector 332 respectively fit the sides of the two rows of battery cells 20. The first accommodating space 333 can accurately fix the position of the first guide member 31, and the second accommodating space 334 can accurately fix the position of the second guide member 32, preventing it from shifting to the inside of the corner.

[0056] Furthermore, the first flow guide 31 and the second connecting portion 332 are flush with each other in the third direction, and the second flow guide 32 and the first connecting portion 331 are also flush with each other in the third direction. This ensures that the thickness of the flow enhancement component 30 is as consistent as possible in the third direction, thereby making the distance between the flow enhancement component 30 and the two rows of battery cells 20 equal. This ensures that the potting compound 40 receives a balanced guiding effect when flowing in the gap between the two rows of battery cells 20, which is beneficial for the uniform distribution of the potting compound 40 in the gap and avoids local overfilling or underfilling. When the flow enhancement components 30 are equidistantly arranged, they can more evenly disrupt the surface tension of the potting compound 40 in the gap, reduce the flow resistance of the potting compound 40, and improve its fluidity.

[0057] In some optional embodiments, multiple first flow guides 31, second flow guides 32, first connecting portions 331 and second connecting portions 332 are provided. The first flow guides 31 are correspondingly provided with the first connecting portions 331, and the second flow guides 32 are correspondingly provided with the second connecting portions 332. The first flow guides 31 and second flow guides 32 are spaced apart, and the first connecting portions 331 and second connecting portions 332 are spaced apart. This allows the flow enhancement component 30 to form a grid structure, which can improve the structural stability of the battery module and the uniformity of the potting compound 40 distribution.

[0058] For example, such as Figures 4-6 As shown, in this embodiment, the first guide member 31, the second guide member 32, the first connecting part 331, and the second connecting part 332 are all configured as two.

[0059] like Figures 4-5 As shown, in this embodiment, both the first flow guide 31 and the second flow guide 32 are wavy. The wavy structure increases the contact area between the first flow guide 31 and the potting compound 40, and the concave-convex shape of the waves more effectively divides the surface tension field of the potting compound 40, further reducing flow resistance. It can also be adapted to adjacent rows of cells 20 that are staggered. Furthermore, after the potting compound 40 cures, the wavy structure enhances the bonding strength between the first flow guide 31, the second flow guide 32, and the potting compound 40, improving the overall structural stability of the battery module.

[0060] In some optional embodiments, the battery module also includes adhesives, through which the current-enhancing component 30 is fixed to at least one row of battery cells 20. When the potting compound 40 flows, it exerts an impact force on the current-enhancing component 30. If the current-enhancing component 30 is not fixed, it may shift or tilt, causing the current-enhancing path to deviate. The adhesives, however, stably fix the current-enhancing component 30 to the surface of the battery cells 20, ensuring its position aligns with the preset flow path and guaranteeing the stability of the current-enhancing effect.

[0061] For example, the adhesive can be configured as an adhesive backing that only contacts a portion of the battery cell 20 and does not cover a large area of ​​the surface of the battery cell 20, thus avoiding affecting the heat dissipation of the battery cell 20.

[0062] In some optional embodiments, along a third direction, the height of the flow-guiding enhancement component 30 is not lower than the leveling height of the potting compound 40. If the height of the flow-guiding enhancement component 30 is lower than the potting height, the potting compound 40 may become turbulent due to loss of guidance when flowing to the top, resulting in uneven filling at the top. The fact that the height of the flow-guiding enhancement component 30 is not lower than the potting height ensures that the guiding effect continues throughout the entire flow of the potting compound 40 (from bottom to top), improving overall filling uniformity.

[0063] In some optional embodiments, along a third direction, the height of the current-enhancing component 30 is flush with the height of the battery cell 20. The current-enhancing component 30 can extend from the bottom to the top of the battery cell 20. After the potting compound 40 cures, the current-enhancing component 30 and the battery cell 20 form an integrated support, significantly improving the stability and impact resistance of the battery module.

[0064] like Figure 1 As shown, this embodiment provides a battery pack, which includes a housing, a busbar assembly, and the aforementioned battery modules. Multiple battery modules are configured, and all multiple battery modules are housed within the housing. The busbar assembly is electrically connected to two adjacent battery modules.

[0065] Since the battery pack includes the aforementioned battery modules, it has high structural stability. The uniformly filled potting compound 40 can make the heat distribution within the battery pack more uniform, thus improving the battery pack performance.

[0066] Optionally, in this embodiment, the housing is made of aluminum alloy and has internal mounting positions for installing battery modules. The busbar assembly can be a copper busbar, which is connected to the terminal of each battery module by bolts.

[0067] This embodiment provides an electrical device, which includes a load and the aforementioned battery pack. The load is electrically connected to the battery pack, and the battery pack is used to provide power to the load.

[0068] This electrical equipment has high structural stability, which can extend its service life and improve its safety performance.

[0069] For example, the load can be configured as a drive motor, inverter, etc., and the electrical equipment can be configured as an electric vehicle, energy storage device, etc.

[0070] Obviously, the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

[0071] Note that in the description of this specification, the references to terms such as "some embodiments," "other embodiments," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. 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.

Claims

1. A battery module, characterized in that, include: Shell (10); A battery cell unit is disposed within the housing (10). The battery cell unit includes multiple rows of battery cells (20) arranged along a first direction. Adjacent rows of battery cells (20) are staggered along a second direction, and there is a gap between adjacent rows of battery cells (20). The first direction and the second direction are perpendicular to each other. Encapsulating compound (40) is used to fill the gap; A flow-guiding enhancement component (30) is disposed within the gap and is configured to guide the flow of the potting compound (40).

2. The battery module according to claim 1, characterized in that, The flow enhancement component (30) includes a first flow guide (31), a second flow guide (32), and a connector (33). The connector (33) includes two end faces that are arranged opposite to each other. The first flow guide (31) is connected to one of the end faces, and the second flow guide (32) is connected to the other end face.

3. The battery module according to claim 2, characterized in that, The connector (33) includes a first connecting part (331) and a second connecting part (332). The first connecting part (331) and the second connecting part (332) are connected to form a bent structure. In two adjacent rows of cells (20), the first connecting part (331) forms a first accommodating space (333) on the side facing one row of cells (20), and the second connecting part (332) forms a second accommodating space (334) on the side facing the other row of cells (20). The first guide (31) is disposed in the first accommodating space (333) and is coplanar with the second connecting part (332) in the plane of the third direction. The second guide (32) is disposed in the second accommodating space (334) and is coplanar with the first connecting part (331) in the plane of the third direction. The third direction is perpendicular to both the first direction and the second direction.

4. The battery module according to claim 3, characterized in that, The first guide member (31), the second guide member (32), the first connecting part (331) and the second connecting part (332) are all provided in multiples. The first guide member (31) is provided corresponding to the first connecting part (331), and the second guide member (32) is provided corresponding to the second connecting part (332). The first guide member (31) and the second guide member (32) are provided at intervals, and the first connecting part (331) and the second connecting part (332) are provided at intervals.

5. The battery module according to claim 2, characterized in that, Both the first guide (31) and the second guide (32) are wavy.

6. The battery module according to any one of claims 1-5, characterized in that, The battery module also includes an adhesive, and the current-enhancing component (30) is fixed to at least one row of the battery cells (20) by the adhesive.

7. The battery module according to any one of claims 1-5, characterized in that, Along a third direction, the height of the flow enhancement component (30) is not lower than the potting leveling height of the potting compound (40); or, the height of the flow enhancement component (30) is flush with the height of the battery cell (20).

8. The battery module according to any one of claims 1-5, characterized in that, The flow-guiding enhancement component (30) is one of glass fiber, carbon fiber and aramid fiber.

9. A battery pack, characterized in that, The battery pack includes a housing, a busbar assembly, and a battery module as described in any one of claims 1-8. The battery module is configured as a plurality of modules, and all of the plurality of battery modules are disposed in the housing. The busbar assembly is electrically connected to two adjacent battery modules.

10. Electrical equipment, characterized in that, The electrical equipment includes a load and the battery pack of claim 9, wherein the load is electrically connected to the battery pack, and the battery pack is used to provide electrical power to the load.

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