Battery pack and electric device

Abstract

The utility model provides a kind of battery pack and electric device, wherein battery pack, comprising: box, the top surface of box is provided with protruding portion at edge, first step portion is provided on protruding portion, second step portion is formed between the top surface of box and protruding portion, and first step portion is higher than second step portion;Partition, it is arranged in the inside of box, the edge of partition is overlapped on second step portion, and the upper surface of the edge of partition is provided with stop piece;Sealing element, it is arranged on first step portion, and the edge of sealing element, partition and stop piece form accommodating space between them.The technical scheme of the application effectively solves the problem that foreign matter near sealing element in related technology is easy to run around.

Description

Technical Field

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

[0002] The primary function of an energy storage battery pack is to store electrical energy for release when needed. The battery pack consists of a housing and seals that enclose it. Foreign objects easily accumulate near these seals, and these objects can easily shift and move around. Utility Model Content

[0003] The main purpose of this utility model is to provide a battery pack and power supply device to solve the problem of foreign objects easily moving around near the seal 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, a protrusion provided at the edge of the top surface of the housing, a first step provided on the protrusion, a second step formed between the top surface of the housing and the protrusion, the first step being higher than the second step; a partition disposed inside the housing, the edge of the partition overlapping the second step, a stop provided on the upper surface of the edge of the partition; and a sealing member disposed on the first step, forming an accommodating space between the sealing member, the edge of the partition, and the stop.

[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, a separator, and a seal. A protrusion is provided at the edge of the top surface of the housing, and a first step is provided on the protrusion. A second step is formed between the top surface of the housing and the protrusion, with the first step being higher than the second step. The separator is disposed inside the housing, and its edge overlaps the second step. A stop is provided on the upper surface of the edge of the separator. The seal is disposed on the first step, and a receiving space is formed between the seal, the edge of the separator, and the stop. In this way, foreign objects near the seal can accumulate in the receiving space, preventing them from moving around. Therefore, the technical solution of this application effectively solves the problem of foreign objects easily moving around near the seal 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 partial structural diagram of the battery pack after the case cover has been removed;

[0010] Figure 3 It shows Figure 2 An enlarged view of point A after the battery pack cover has been removed;

[0011] Figure 4 It shows Figure 3 An enlarged view of point B after the battery pack cover has been removed;

[0012] Figure 5 It shows Figure 1 A three-dimensional structural diagram of the battery pack after longitudinal sectioning;

[0013] Figure 6 It shows Figure 5 An enlarged view of point C of the battery pack;

[0014] Figure 7 It shows Figure 1 A longitudinal cross-sectional view of the battery pack;

[0015] Figure 8 It shows Figure 7 An enlarged schematic diagram of point D of the battery pack;

[0016] Figure 9 It shows Figure 1 A three-dimensional structural diagram of the battery pack after longitudinal sectioning at the fasteners;

[0017] Figure 10 It shows Figure 9 An enlarged view of point E on the battery pack.

[0018] The above figures include the following reference numerals:

[0019] 10. Box body; 11. Protrusion; 12. First step; 13. Second step;

[0020] 20. Partition; 21. Edge of partition; 211. Limiting notch; 22. Stop; 23. Main body; 24. Overlapping part;

[0021] 30. Seals; 31. Gaskets;

[0022] 41. Accommodating space; 411. Subspace; 42. Partition; 421. First partition protrusion; 422. Second partition protrusion;

[0023] 50. Box lid;

[0024] 60. Battery module;

[0025] L1, first gap; L2, second gap; H1, first distance; H2, second distance. Detailed Implementation

[0026] 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.

[0027] 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.

[0028] 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.

[0029] like Figures 1 to 3As shown, this application provides a battery pack, an embodiment of which includes: a housing 10, a separator 20, and a seal 30. A protrusion 11 is provided at the edge of the top surface of the housing 10, and a first step 12 is provided on the protrusion 11. A second step 13 is formed between the top surface of the housing 10 and the protrusion 11, with the first step 12 being higher than the second step 13. The separator 20 is disposed inside the housing 10, and its edge 21 overlaps the second step 13. A stop 22 is provided on the upper surface of the edge 21 of the separator. The seal 30 is disposed on the first step 12, and an accommodating space 41 is formed between the seal 30, the edge 21 of the separator, and the stop 22.

[0030] In the embodiment of the battery pack, a receiving space 41 is formed between the seal 30, the edge 21 of the separator, and the stop 22. This allows foreign matter near the seal 30 to accumulate in the receiving space 41, preventing it from moving around. Therefore, the technical solution of the battery pack embodiment effectively solves the problem of foreign matter easily moving around near the seal 30 in related technologies.

[0031] It should be noted that the edge 21 of the partition refers to the annular portion located on the outer contour of the partition in the direction from the center of the partition. The stop 22 is positioned close to the outer contour of the partition but at a certain distance.

[0032] Specifically, the housing 10 includes two long sidewalls and two wide sidewalls arranged opposite each other. The two wide sidewalls are located between the two long sidewalls and together form a rectangular frame. The length of the long sidewalls is greater than the length of the wide sidewalls. The protrusion 11 is a rectangular frame structure, connected to the top surface of the long sidewalls and the top surface of the wide sidewalls. There are two first step portions 12 and two second step portions 13, located at the positions of the two long sidewalls respectively. The sealing element 30 is a sealing ring.

[0033] like Figures 2 to 6 As shown, the separator 20 is a liquid-cooled plate. By using a liquid-cooled plate as the separator 20, the liquid-cooling channels designed inside the liquid-cooled plate can remove the internal heat of the battery pack through circulating coolant during battery operation, thereby reducing the temperature of the battery pack and improving the efficiency and lifespan of the battery pack.

[0034] like Figures 2 to 5 As shown, the liquid cooling plate includes a main body 23 and an overlapping portion 24 disposed on the side edge of the main body 23. A liquid cooling channel is provided inside the main body 23, and the overlapping portion 24 overlaps the second step portion 13. The overlapping portion 24 of the liquid cooling plate forms contact with the second step portion 13 of the housing 10 to form an installation relationship, which facilitates the assembly of the liquid cooling plate; at the same time, it increases the contact area between the liquid cooling plate and the housing 10, thereby improving the heat transfer efficiency.

[0035] In other embodiments, the edge 21 of the partition abuts against the side wall of the second step portion 13. When the edge 21 of the partition directly abuts against the side wall, the stability of the partition 20 can be enhanced.

[0036] like Figures 5 to 8 As shown, there is a first gap L1 between the edge 21 of the partition and the side wall of the second step portion 13. The first gap L1 is provided to facilitate the edge 21 of the partition to overlap the second step portion 13, which is beneficial for assembly.

[0037] like Figures 5 to 8 As shown, the top surface of the edge 21 of the partition is lower than the bottom wall surface of the first step portion 12. This facilitates the placement of the seal 30 on the first step portion 12 and prevents interference between the edge 21 of the partition and the seal 30; furthermore, the formed accommodating space 41 has a certain depth, which can accommodate more foreign objects.

[0038] like Figures 2 to 4 As shown, the accommodating space 41 is provided with a partition 42 to divide the accommodating space 41 into multiple subspaces 411. By dividing the accommodating space 41 by the partition 42, each subspace 411 can independently accommodate foreign objects, restricting the free movement of foreign objects in the subspace 411.

[0039] like Figures 2 to 4 and Figure 10 As shown, for ease of processing and molding, the partition portion 42 includes a first partition protrusion 421 connected to the second step portion 13 and a second partition protrusion 422 connected to the first step portion 12.

[0040] Specifically, the first partition protrusion 421 and the second step portion 13 are integrally formed, and the second partition protrusion 422 and the first step portion 12 are integrally formed; of course, in other embodiments, the first partition protrusion 421 and the second step portion 13 are separate structures, and the second partition protrusion 422 and the first step portion 12 are separate structures.

[0041] like Figures 4 to 10 As shown, the top surface of the first partition protrusion 421 is flush with the bottom wall surface of the first step portion 12, and the top surface of the second partition protrusion 422 is flush with the top surface of the protrusion portion 11. Thus, the top surface of the first partition protrusion 421 and the bottom wall surface of the first step portion 12 together form a continuous surface, and the top surface of the second partition protrusion 422 and the top surface of the protrusion portion 11 also together form a continuous surface. The sealing element 30 is also connected to the top surface of the first partition protrusion 421 and the side surface of the second partition protrusion 422. This arrangement of the sealing element 30 results in a relatively flat position and provides better sealing performance.

[0042] like Figure 8 and Figure 10As shown, there is a first distance H1 between the first partition protrusion 421 and the stop member 22, and a second distance H2 between the second partition protrusion 422 and the stop member 22. The first distance H1 is smaller than the second distance H2. By adjusting the first distance H1 and the second distance H2, it can be ensured that the sealing member 30 can achieve good sealing performance and effectively prevent foreign objects from entering.

[0043] like Figures 2 to 4 As shown, a limiting notch 211 is provided on the edge 21 of the partition plate corresponding to the position of the partition part 42 to restrict the horizontal movement of the partition plate 20 in the box body 10. The limiting notch 211 can prevent the partition plate 20 from being displaced in the horizontal direction, and while facilitating assembly, it can also ensure that the assembly position of the partition plate 20 is relatively stable.

[0044] like Figure 1 and Figures 5 to 10 As shown, the battery pack also includes a cover 50 that is disposed on the top surface of the protrusion 11. A stop 22 extends into the cover 50, and a second gap L2 is provided between the stop 22 and the inner sidewall of the cover 50. The stop 22 extends into the cover 50 and maintains the second gap L2, which can limit the displacement of the cover 50 on the top surface of the protrusion 11, so as to facilitate the smooth placement of the cover 50 on the top surface of the protrusion 11 and facilitate assembly.

[0045] Specifically, the cover 50 is fixed to the top surface of the protrusion 11 by fasteners, preferably screws, bolts or studs.

[0046] like Figures 1 to 5 As shown, the sealing element 30 includes a sealing gasket 31, and the top surface of the stop 22 is higher than the top surface of the sealing gasket 31. Since the top surface of the stop 22 is higher than the sealing gasket 31, the stop 22 can block foreign objects in the accommodating space 41 and prevent foreign objects from entering the interior of the housing 10.

[0047] It should be noted that the top surface of the sealing gasket refers to the top surface of the sealing gasket in its natural state when the battery pack is stationary.

[0048] like Figures 2 to 7 As shown, the battery pack also includes multiple battery modules 60, which are arranged vertically, with the upper battery module 60 and the lower battery module 60 separated by a partition 20. By separating the battery modules 60 vertically by the partition 20, the storage space between the cover 50 and the body 10 can be utilized more efficiently, thereby improving the energy storage capacity of the battery pack.

[0049] Each battery module 60 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 a casing. Alternatively, the battery module 60 can be composed of multiple battery cells first connected in series, parallel, or in a hybrid configuration, and then the multiple battery modules 60 are connected in series, parallel, or in a hybrid configuration to form a whole, which is then housed within the receiving space enclosed between the casing cover 50 and the casing 10. The battery module 60 may also include other structures; for example, it may include a busbar component for electrical connection between the multiple battery cells.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] This application also provides an electrical device, an embodiment of which includes a battery pack, the battery pack being the one described above. The battery pack integrating the above-described optimized design can provide a more stable and efficient power supply to the electrical device, reducing the risk of battery failure and extending battery life by improving heat dissipation efficiency and preventing foreign object intrusion.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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 (10) has a protrusion (11) at the edge of the top surface of the box (10), a first step (12) is provided on the protrusion (11), and a second step (13) is formed between the top surface of the box (10) and the protrusion (11), wherein the first step (12) is higher than the second step (13). A partition (20) is provided inside the box (10), the edge (21) of the partition overlaps the second step (13), and a stop (22) is provided on the upper surface of the edge (21) of the partition. A sealing element (30) is disposed on the first step portion (12), and an accommodating space (41) is formed between the sealing element (30), the edge (21) of the partition and the stop (22).

2. The battery pack according to claim 1, characterized in that, The partition (20) is a liquid-cooled plate.

3. The battery pack according to claim 2, characterized in that, The liquid cooling plate includes a main body (23) and an overlapping part (24) disposed on the side edge of the main body (23). A liquid cooling channel is provided inside the main body (23), and the overlapping part (24) overlaps on the second step part (13).

4. The battery pack according to claim 2, characterized in that, The edge (21) of the partition plate abuts against the side wall of the second step (13).

5. The battery pack according to claim 2, characterized in that, There is a first gap (L1) between the edge (21) of the partition and the side wall of the second step (13).

6. The battery pack according to claim 2, characterized in that, The top surface of the edge (21) of the partition is lower than the bottom wall surface of the first step (12).

7. The battery pack according to any one of claims 1 to 6, characterized in that, The accommodating space (41) is provided with a partition (42) to divide the accommodating space (41) into multiple subspaces (411).

8. The battery pack according to claim 7, characterized in that, The partition portion (42) includes a first partition protrusion (421) connected to the second step portion (13) and a second partition protrusion (422) connected to the first step portion (12).

9. The battery pack according to claim 8, characterized in that, The top surface of the first partition protrusion (421) is flush with the bottom wall surface of the first step portion (12), the top surface of the second partition protrusion (422) is flush with the top surface of the protrusion portion (11), and the sealing member (30) is also connected to the top surface of the first partition protrusion (421) and the side surface of the second partition protrusion (422).

10. The battery pack according to claim 8, characterized in that, The first partition protrusion (421) has a first distance (H1) between itself and the stop (22), and the second partition protrusion (422) has a second distance (H2) between itself and the stop (22). The first distance (H1) is smaller than the second distance (H2).

11. The battery pack according to claim 7, characterized in that, The edge (21) of the partition is provided with a limiting notch (211) corresponding to the position of the partition (42) to restrict the movement of the partition (20) in the horizontal direction of the box (10).

12. The battery pack according to any one of claims 1 to 6, characterized in that, The battery pack also includes a cover (50) covering the top surface of the protrusion (11), the stop (22) extending into the cover (50), and a second gap (L2) between the stop (22) and the inner wall of the cover (50).

13. The battery pack according to any one of claims 1 to 6, characterized in that, The seal (30) includes a gasket (31), and the top surface of the stop (22) is higher than the top surface of the gasket (31).

14. The battery pack according to any one of claims 1 to 6, characterized in that, The battery pack also includes multiple battery modules (60), which are arranged vertically, with the upper battery module (60) and the lower battery module (60) separated by the partition (20).

15. 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 14.

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