Battery pack and electric device

Abstract

The utility model provides a kind of battery pack and electric device, wherein battery pack, comprising: box, including first surface, second surface and third surface connected in turn, wherein, first surface is the top surface of box, third surface is vertical surface, the included angle between first surface, second surface and third surface two by two is all greater than 90 degrees;Connector, installation is in second surface.The technical scheme of the application effectively solves the problem of poor installation reliability of the connector in the related art.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and more specifically, to a battery pack and an electrical device. Background Technology

[0002] The battery pack in the related technology includes a housing and a connector mounted on the housing. When the battery pack is exposed to vibration, the connector on the housing is prone to loosening, resulting in poor installation reliability of the connector. Utility Model Content

[0003] The main objective of this invention is to provide a battery pack and power supply device to solve the problem of poor installation reliability of connectors in related technologies.

[0004] To achieve the above objectives, according to one aspect of the present invention, a battery pack is provided, comprising: a housing, including a first surface, a second surface, and a third surface connected in sequence, wherein the first surface is the top surface of the housing, the third surface is a vertical surface, and the included angle between any two of the first surface, the second surface, and the third surface is greater than 90 degrees; and a connector mounted on the second surface.

[0005] According to another aspect of the present invention, an electrical device is provided, including a battery pack, wherein the battery pack is the aforementioned battery pack.

[0006] The battery pack using the technical solution of this utility model includes a housing and a connector. The housing includes a first surface, a second surface, and a third surface connected in sequence, wherein the first surface is the top surface of the housing, the third surface is a vertical surface, and the included angle between any pair of the first, second, and third surfaces is greater than 90 degrees. The connector is installed on the second surface. Thus, the connector is no longer installed on the vertical surface of the housing, but on the inclined surface of the second surface, allowing the connector to receive support from both the horizontal and vertical directions. Therefore, when the battery pack encounters vibration, the connector is supported by two support forces from at least two directions, avoiding support only from the horizontal direction, effectively preventing the connector from loosening on the housing and improving the installation reliability of the connector. Therefore, the technical solution of this application effectively solves the problem of poor installation reliability of connectors in related technologies. Attached Figure Description

[0007] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0008] Figure 1 A perspective structural schematic diagram of an embodiment of the battery pack according to the present invention is shown;

[0009] Figure 2 It shows Figure 1 A cross-sectional view of the battery pack;

[0010] Figure 3 It shows Figure 1 A three-dimensional structural diagram of the battery pack after longitudinal sectioning;

[0011] Figure 4 It shows Figure 1 A front view schematic diagram of the battery pack.

[0012] The above figures include the following reference numerals:

[0013] 10. Box body; 11. First side; 111. Recessed part; 112. Bottom wall; 113. Side wall; 12. Second side; 121. Mounting port; 13. Third side; 14. Reinforcing protrusion; 15. Box body; 16. Box lid;

[0014] 20. Connectors;

[0015] 30. Bracket;

[0016] 40. Battery module;

[0017] H1, first dimension; H2, second dimension; L1, first distance; L2, second distance. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0019] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0020] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0021] like Figures 1 to 3 As shown, this application provides a battery pack, an embodiment of which includes a housing 10 and a connector 20. The housing 10 includes a first surface 11, a second surface 12 and a third surface 13 connected in sequence, wherein the first surface 11 is the top surface of the housing 10, the third surface 13 is a vertical surface, and the included angle between any two of the first surface 11, the second surface 12 and the third surface 13 is greater than 90 degrees.

[0022] In the embodiment of the battery pack, the connector 20 is no longer installed on the vertical surface of the housing 10, but on an inclined surface such as the second surface 12. This allows the connector 20 to receive support from both the horizontal and vertical directions. Thus, when the battery pack encounters vibration, the connector 20 is supported by two forces in at least two directions, avoiding support only in the horizontal direction. This effectively prevents the connector 20 from loosening on the housing 10 and improves the installation reliability of the connector 20. Therefore, the technical solution of the battery pack embodiment effectively solves the problem of poor installation reliability of the connector 20 in related technologies. Especially when the battery pack is installed on a heavily loaded vehicle, the vibration is more severe, and the connector 20 is supported by two forces in at least two directions, which fully ensures the installation reliability of the connector 20.

[0023] It should be noted that the relationship between the first surface 11, the second surface 12, and the third surface 13 refers to the relationship between the first surface 11 and the second surface 12, and the relationship between the second surface 12 and the third surface 13. The first surface 11 can be a complete surface or a combination of several planes connected together to form a complete surface.

[0024] like Figure 3 and Figure 4As shown, the second surface 12 has a first dimension H1 in the height direction of the housing 10, and the third surface 13 has a second dimension H2 in the height direction of the housing 10. The ratio between the first dimension H1 and the second dimension H2 is greater than or equal to 1 and less than or equal to 4. By adjusting the ratio of the dimensions of the second surface 12 and the third surface 13 in the height direction of the housing 10, the mechanical properties of the housing 10 structure can be optimized. When the battery pack encounters a vibration environment, the connector 20 is reliably supported by two support forces in at least two directions, and the connector 20 can still maintain a good installation state. Furthermore, when the battery pack encounters a vibration environment, the stress applied to the housing 10 by the connector 20 can be more evenly distributed, avoiding stress concentration near the connector 20 and reducing the possibility of the connector 20 loosening.

[0025] Preferably, the ratio between the first dimension H1 and the second dimension H2 is 1, 1.5, 2, 2.5, 3, 3.5, or 4.

[0026] Furthermore, the ratio between the first dimension H1 and the second dimension H2 is greater than or equal to 1 and less than or equal to 2. Preferably, the ratio between the first dimension H1 and the second dimension H2 is 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, or 2.

[0027] like Figure 3 and Figure 4 As shown, in the inclined direction of the second surface 12, the ratio between the width d of the connector 20 and the width D of the second surface 12 is greater than or equal to 0.5 and less than or equal to 0.8. If the ratio between the width d of the connector 20 and the width D of the second surface 12 is less than 0.5, it indicates that the width D of the second surface 12 is too long, the structural strength of the second surface 12 is reduced, the central area of ​​the second surface 12 vibrates greatly, and the risk of damage is high. If the ratio between the width d of the connector 20 and the width D of the second surface 12 is greater than 0.8, it indicates that the installation position of the connector 20 is too close to the first surface 11 and the third surface 13. The weight and vibration force of the connector 20 will be transmitted to the recessed portion 111 of the first surface 11, resulting in greater force on the end of the recessed portion 111 and increased pressure on the battery due to vibration.

[0028] Preferably, the ratio between the width d of the connector 20 and the width D of the second surface 12 is 0.5, 0.6, 0.7, or 0.8.

[0029] like Figure 3 and Figure 4As shown, the angle between the second surface 12 and the first surface 11 is greater than or equal to 120 degrees and less than or equal to 160 degrees. By setting a specific range of the angle between the second surface 12 and the first surface 11, it can be ensured that the installation position of the connector 20 is not directly affected by the purely vertical vibration direction, thereby effectively reducing the direct impact force on the connector 20. The angle selection can both form sufficient support forces in at least two directions and maximize the dispersion of vibration stress.

[0030] Preferably, the included angle between the second surface 12 and the first surface 11 is 122 degrees, 125 degrees, 128 degrees, 130 degrees, 132 degrees, 135 degrees, 138 degrees, 140 degrees, 142 degrees, 145 degrees, 148 degrees, 150 degrees, 152 degrees, 155 degrees, 158 degrees, or 160 degrees.

[0031] like Figure 3 and Figure 4 As shown, a recessed portion 111 is provided on the first surface 11, the recessed portion 111 has a bottom wall surface 112, and a reinforcing protrusion 14 is formed between the bottom wall surface 112 and the second surface 12. The recessed portion 111 on the first surface 11 and the reinforcing protrusion 14 formed between its bottom wall surface 112 and the second surface 12 can significantly increase the overall structural strength of the housing 10 and effectively resist the deformation of the housing 10 under external pressure.

[0032] like Figure 3 and Figure 4 As shown, the recess 111 also has a sidewall surface 113 closest to the second surface 12. A first distance L1 exists between the sidewall surface 113 and the top of the second surface 12, and a second distance L2 exists between the sidewall surface 113 and the bottom of the second surface 12. The ratio between the first distance L1 and the second distance L2 is greater than or equal to 0.1 and less than or equal to 0.3. When vibrations originate from different directions, the sidewall surface 113 of the recess 111 provides effective support. Simultaneously, the reinforcing protrusion 14 better disperses stress, protecting the connector 20 from deformation and effectively reducing the possibility of the connector 20 loosening.

[0033] Preferably, the ratio between the first distance L1 and the second distance L2 is 0.1 or 0.12 or 0.14 or 0.15 or 0.18 or 0.2 or 0.22 or 0.24 or 0.25 or 0.28 or 0.3.

[0034] Specifically, a preset angle is formed between the side wall surface 113 and the bottom wall surface 112 of the recessed portion 111, which is preferably a right angle or an obtuse angle.

[0035] like Figure 3 and Figure 4As shown, a mounting port 121 is provided on the second surface 12, and the connector 20 is fixed at the mounting port 121. Providing a mounting port 121 on the second surface 12 not only facilitates the accurate installation of the connector 20, but also allows the mounting port 121 to limit the displacement of the connector 20 during vibration, thereby improving the stability of the structure of the second surface 12 and the reliability of the connector 20 installation.

[0036] like Figure 2 and Figure 3 As shown, the battery pack also includes a bracket 30 disposed within the housing 10. The bracket 30 is located at the mounting port 121 to support the connector 20. The bracket 30 enhances the installation strength between the connector 20 and the housing 10, ensuring the connector 20 remains secure even under severe vibration. Furthermore, the housing 10 includes a main body 15 and a cover 16 covering the main body 15. A first surface 11, a second surface 12, and a third surface 13 are all located on the cover 16. The cover 16 is part of the upper structure of the housing 10. The connector 20 is installed on the upper structure of the housing 10, i.e., on the cover 16, improving installation efficiency. The second surface 12 corresponding to the connector 20 can distribute the applied stress, and by strengthening the structural strength of the housing 10 where the second surface 12 is located, the risk of deformation of the second surface 12 corresponding to the connector 20 under vibration conditions is reduced. The installation of the connector 20 further strengthens the structural strength of the housing 10.

[0037] Specifically, the bracket 30 is preferably a metal bracket, which includes a support plate connected to the inner wall of the box body 15 and a support inclined plate connected to the top of the support plate. The support inclined plate is partially connected to the box cover 16 at the location of the second surface 12, and the included angle between the support inclined plate and the support plate is equal to or greater than the included angle between the second surface 12 and the first surface 11. The connector 20 is connected to the support inclined plate.

[0038] like Figure 3 and Figure 4As shown, the battery also includes multiple battery modules 40 disposed within the housing 10. These battery modules 40 are electrically connected and arranged vertically. The multiple battery modules 40, electrically connected and arranged vertically, form a multi-layer structure, which not only fully utilizes the space of the housing 10 and increases energy density, but also further reduces the impact of vibration on the connector 20 by placing it at the top of the housing 10, away from direct sources of vibration, such as the bottom of the housing 10. Each battery module 40 includes multiple battery cells. These battery cells can be directly connected in series, parallel, or in a hybrid configuration, and then the entire assembly of the battery cells is housed within the housing. Alternatively, the battery module 40 can be composed of multiple battery cells first connected in series, parallel, or in a hybrid configuration, and then the multiple battery modules 40 are connected in series, parallel, or in a hybrid configuration to form a whole and housed within the housing 10. The battery module 40 may also include other structures; for example, it may include a busbar component for realizing the electrical connection between the multiple battery cells.

[0039] Connector 20 can be various electrical connection interfaces. For example, connector 20 may include only a high-voltage connector, connector 20 may include only a low-voltage connector, or connector 20 may include both high-voltage and low-voltage connectors, wherein the high-voltage connector includes a positive high-voltage connector and a negative high-voltage connector. In some embodiments, connector 20 may also include a mounting component, on which the high-voltage connector and / or the low-voltage connector is disposed. Connector 20 may also include a maintenance switch connected between the battery cell and the total output positive terminal, used to maintain or disconnect the connection between the battery cell and the total output positive terminal.

[0040] Specifically, connector 20 needs to be partially located outside the housing 10 and connected to a wire harness; the wire harness can pass through the mounting port 121 to connect to the device in the housing 10; or, connector 20 passes through the mounting port 121 so that it is partially located outside the housing 10 and the wire harness is connected to the device in the housing 10.

[0041] The battery cell can be a secondary battery or a primary battery; it can also be a lithium-ion battery, a lithium-sulfur battery, a sodium-lithium-ion battery, a sodium-ion battery, or a magnesium-ion battery, etc., and this embodiment of the present invention is not limited in this regard. The battery cell can be cylindrical, flat, cuboid, or other shapes, and this embodiment of the present invention is not limited in this regard either. Battery cells are generally classified into three types according to their packaging method: cylindrical battery cells, square battery cells, and pouch battery cells, and this embodiment of the present invention is not limited in this regard either.

[0042] For example, a battery cell may include a casing, electrode assembly, and electrolyte. The casing houses the electrode assembly and electrolyte. The electrode assembly consists of a positive electrode, a negative electrode, and a separator. The battery cell primarily functions by the movement of metal ions between the positive and negative electrode plates. The positive electrode includes a positive current collector and a positive active material layer. The positive active material layer is coated on the surface of the positive current collector, and the uncoated positive current collector protrudes beyond the coated positive current collector, serving as the positive electrode tab. Taking a lithium-ion battery as an example, the positive current collector can be made of aluminum, and the positive active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium, or lithium manganese oxide, etc.

[0043] The negative electrode includes a negative current collector and a negative active material layer. The negative active material layer is coated on the surface of the negative current collector, and the negative current collector without the negative active material layer protrudes from the one with the negative active material layer. The negative current collector without the negative active material layer serves as the negative electrode tab. The material of the negative current collector can be copper, and the negative active material can be carbon or silicon, etc. To ensure that a large current can be passed without melting, there are multiple positive electrode tabs stacked together, and there are multiple negative electrode tabs stacked together.

[0044] The separator can be made of PP (polypropylene) or PE (polyethylene), etc. Furthermore, the electrode assembly can be a wound structure or a stacked structure; the embodiments of this application are not limited to these.

[0045] A battery cell can be equipped with terminals or tabs that connect to the terminals, serving as the electrical connection points. Furthermore, battery cells typically have pressure relief sections. When the internal pressure of the battery cell becomes excessive (e.g., thermal runaway), these sections release substances (e.g., gases, liquids, particulate matter) to reduce the internal pressure and prevent rapid pressurization that could lead to dangerous accidents such as battery cell explosion. For example, the pressure relief section can be an explosion-proof valve or an explosion-proof plate.

[0046] This application also provides an electrical device, an embodiment of which includes a battery pack, the battery pack described above, capable of providing electrical energy to the electrical device. Applying the above-described battery pack to the electrical device can significantly improve the operational reliability and safety of the electrical device in vibration environments.

[0047] The electrical devices covered in this application may include, but are not limited to, vehicles, mobile phones, tablets, laptops, ships, spacecraft, electric toys, and power tools. Vehicles may be fuel-powered vehicles, natural gas vehicles, new energy vehicles, or rail vehicles; new energy vehicles may be pure electric vehicles, hybrid vehicles, or range-extended vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric vehicle toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0048] In the description of this utility model, it should be understood that "multiple" means a quantity of two or more. Directional terms such as "front, back, up, down, left, right," "horizontal, vertical, perpendicular, horizontal," and "top, bottom" indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are used solely for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as limiting the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner or outer contours relative to the outline of each component itself.

[0049] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0050] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0051] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A battery pack, characterized in that, include: The box body (10) includes a first surface (11), a second surface (12) and a third surface (13) connected in sequence, wherein the first surface (11) is the top surface of the box body (10), the third surface (13) is a vertical surface, and the included angle between each pair of the first surface (11), the second surface (12) and the third surface (13) is greater than 90 degrees. Connector (20) is mounted on the second side (12).

2. The battery pack according to claim 1, characterized in that, The second surface (12) has a first dimension (H1) in the height direction of the box (10), and the third surface (13) has a second dimension (H2) in the height direction of the box (10). The ratio between the first dimension (H1) and the second dimension (H2) is greater than or equal to 1 and less than or equal to 4.

3. The battery pack according to claim 1, characterized in that, In the inclined direction of the second surface (12), the ratio between the width of the connector (20) and the width of the second surface (12) is greater than or equal to 0.5 and less than or equal to 0.

8.

4. The battery pack according to claim 1, characterized in that, The angle between the second face (12) and the first face (11) is greater than or equal to 120 degrees and less than or equal to 160 degrees.

5. The battery pack according to any one of claims 1 to 4, characterized in that, A recessed portion (111) is provided on the first surface (11), the recessed portion (111) has a bottom wall surface (112), and a reinforcing protrusion (14) is formed between the bottom wall surface (112) and the second surface (12).

6. The battery pack according to claim 5, characterized in that, The recess (111) also has a sidewall (113) closest to the second surface (12), the sidewall (113) having a first distance (L1) between the top of the second surface (12) and the sidewall (113) having a second distance (L2) between the bottom of the second surface (12), the ratio between the first distance (L1) and the second distance (L2) being greater than or equal to 0.1 and less than or equal to 0.

3.

7. The battery pack according to any one of claims 1 to 4, characterized in that, The second side (12) is provided with an installation port (121), and the connector (20) is fixed at the installation port (121).

8. The battery pack according to claim 7, characterized in that, The battery pack also includes a bracket (30) disposed within the housing (10), the bracket (30) being located at the mounting port (121) to support the connector (20).

9. The battery pack according to any one of claims 1 to 4, characterized in that, The box (10) includes a box body (15) and a box cover (16) covering the box body (15), wherein the first surface (11), the second surface (12) and the third surface (13) are all located on the box cover (16).

10. The battery pack according to any one of claims 1 to 4, characterized in that, The battery also includes a plurality of battery modules (40) disposed within the housing (10), the plurality of battery modules (40) being electrically connected and arranged vertically.

11. An electrical device comprising a battery pack, characterized in that, The battery pack is the battery pack according to any one of claims 1 to 10.

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