Battery pack and vehicle

Abstract

The present application relates to the technical field of batteries, and provides a battery pack and a vehicle, used for improving the structural strength of a box cover in the battery pack. The battery pack comprises a housing, a box cover, a battery module, and a buffer pressing strip. The housing is internally provided with an accommodating cavity. The box cover is fitted to the housing to close the accommodating cavity. The battery module is located in the accommodating cavity. The buffer pressing strip is used for absorbing the impact of the box cover, the bottom of the buffer pressing strip is connected to the battery module, and the top of the buffer pressing strip is connected to the box cover. In the battery pack and the vehicle provided in the present application, the bottom of a buffer pressing strip is connected to a battery module, and the top of the buffer pressing strip is connected to a box cover, so that the buffer pressing strip is arranged between the battery module and the box cover, and thus the impact of the box cover is absorbed by means of the buffer pressing strip, so as to enhance the structural strength of the battery pack box cover, thereby avoiding deformation of the battery pack box cover.

Description

Battery packs and vehicles

[0001] This application claims priority to Chinese Patent Application No. 202422630399.3, filed on October 29, 2024, entitled "Battery Pack and Vehicle", the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of battery technology, and more particularly to a battery pack and a vehicle. Background Technology

[0003] Battery packs are the power systems for vehicles such as electric cars and electric trains. Typically, a battery pack consists of a housing with a cover and battery modules located inside the housing.

[0004] However, the battery pack cover is prone to deformation, resulting in low structural strength. Summary of the Invention

[0005] This application provides a battery pack and a vehicle for reducing or avoiding deformation of the battery pack cover and improving the structural strength of the battery pack cover.

[0006] To achieve the above objectives, this application provides the following technical solution:

[0007] One aspect of this application provides a battery pack, which includes a housing, a cover, a battery module, and a cushioning strip.

[0008] The box has a receiving cavity;

[0009] The lid is fastened to the box body to close the receiving cavity;

[0010] The battery module is located within the receiving cavity;

[0011] The buffer strip is used to absorb the impact of the box lid. The bottom of the buffer strip is connected to the battery module, and the top of the buffer strip is connected to the box lid.

[0012] In one possible implementation, the battery module includes multiple cell groups;

[0013] Each of the battery cell groups is arranged sequentially along the first direction;

[0014] Each of the battery cell groups includes multiple battery cells, which are arranged sequentially along a second direction. Each battery cell has a cover plate on its top, and the buffer strip is connected to the cover plate.

[0015] In one possible implementation, the battery cell further includes a positive terminal and a negative terminal disposed on the cover plate, with a first gap between the buffer strip and the positive terminal, and a second gap between the buffer strip and the negative terminal.

[0016] In one possible implementation, the battery module further includes a plurality of electrical connectors, wherein two adjacent cells along the second direction are connected by electrical connectors;

[0017] There is a gap between the reinforcing rib and the electrical connector.

[0018] In one possible implementation, along the second direction, any two adjacent positive terminals are connected by one of the electrical connectors;

[0019] Along the second direction, any two adjacent negative terminals are connected by one of the electrical connectors.

[0020] In one possible implementation, the reinforcing rib includes a plurality of first reinforcing ribs, each of which extends along the first direction and is located between two adjacent electrical connectors along the second direction.

[0021] In one possible implementation, the reinforcing rib includes a plurality of second reinforcing ribs, each of which extends along the second direction and is located between two adjacent electrical connectors along the first direction.

[0022] In one possible implementation, the cover is configured as a vehicle floor. In another possible implementation, the lifting lug is a hollow structure, and all ends of the lifting lug are closed.

[0023] Another aspect of this application provides a vehicle that includes the battery pack described in any of the above claims.

[0024] The battery pack and vehicle provided in this application have the following beneficial effects:

[0025] The battery pack includes a housing, a cover, battery modules, and a shock absorber strip. The housing has a recessed cavity that houses the battery modules, protecting them. The cover snaps onto the housing, ensuring the recessed cavity is closed when the cover is closed, preventing the battery modules from sliding out. The shock absorber strip is positioned between the battery modules and the cover, with its bottom connected to the battery modules and its top connected to the cover, absorbing impacts from the cover.

[0026] Compared with related technologies, the battery pack and vehicle provided in this application connect the bottom of the buffer strip to the battery module and the top of the buffer strip to the cover, so that the buffer strip is placed between the battery module and the cover. This allows the buffer strip to absorb the impact of the cover, thereby reducing or avoiding deformation of the battery pack cover and improving the structural strength of the battery pack cover. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments or related technologies of this application, the accompanying drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 is a schematic diagram of the exploded structure of the battery pack provided in an embodiment of this application;

[0029] Figure 2 is a schematic diagram of the structure of the buffer strip provided in an embodiment of this application;

[0030] Figure 3 is a schematic diagram of the structure of the battery cell provided in an embodiment of this application;

[0031] Figure 4 is a partial enlarged structural diagram of the battery module.

[0032] Explanation of reference numerals in the attached drawings: X, first direction; Y, second direction; 10, housing; 11, receiving cavity; 20, cover; 30, battery module; 31, cell assembly; 311, cell; 311a, cover plate; 311b, housing; 32, electrical connector; 40, buffer strip; 41, main body; 42, reinforcing rib; 421, first reinforcing rib; 422, second reinforcing rib. Detailed Implementation

[0033] The battery pack suffers from a technical problem: the battery pack cover has low structural strength, making it prone to deformation. This issue arises because the battery pack cover, as the top structural component of the battery pack, must withstand the pressure from above. Especially when integrated into the vehicle floor, the cover must bear the weight of the seats and the pressure from passengers, further contributing to the low structural strength and making the cover susceptible to deformation.

[0034] To address the aforementioned technical problems, this application provides a battery pack and a vehicle. By connecting the bottom of the buffer strip to the battery module and the top of the buffer strip to the cover, the buffer strip is positioned between the battery module and the cover. This allows the buffer strip to absorb the impact of the cover, thereby reducing or preventing deformation of the battery pack cover and improving the structural strength of the battery pack cover.

[0035] To make the above-mentioned objectives, features, and advantages of the embodiments of this application more apparent and understandable, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0036] As shown in Figure 1, this embodiment of the application provides a battery pack, which includes a housing 10, a cover 20, a battery module 30, and a buffer strip 40. The housing 10 is the main structure of the battery pack, and can be cylindrical, approximately cylindrical, cuboid, or approximately cuboid in shape. The housing 10 has a receiving cavity 11, which can be a cylindrical groove, approximately cylindrical groove, rectangular groove, or approximately rectangular groove. The receiving cavity 11 can be used to accommodate the battery module 30.

[0037] As shown in Figure 1, the lid 20 can be the top cover of the box body 10, and the lid 20 is fastened to the box body 10 to close the receiving cavity 11. For example, the lid 20 and the box body 10 are connected by threads, and a screw passes between the bottom of the lid 20 and the top of the box body 10. Alternatively, the lid 20 and the box body 10 are hinged so that the lid 20 can rotate relative to the box body so that the lid 20 can close onto the box body 10.

[0038] The battery module 30 is the power supply component of the battery pack. The battery module 30 includes multiple battery cells 311, which are electrically connected to each other. Each battery cell 311 in the battery module 30 is located within the receiving cavity 11, for example, the battery module 30 is adhered to the bottom of the housing 10.

[0039] The buffer strip 40 is made of a buffer material that is plastic and elastic, capable of absorbing, buffering and dispersing mechanical impact and vibration energy. For example, the buffer material can be ethylene-vinyl acetate copolymer (EVA), expanded polystyrene (EPS), expanded polyethylene (EPE), polyurethane (PU), or expanded polypropylene (EPP).

[0040] As shown in Figure 1, a buffer strip 40 is located between the cover 20 and the battery module 30. The top of the buffer strip 40 is connected to the cover 20, for example, the top of the buffer strip 40 is adhered to the cover 20. The bottom of the buffer strip 40 is connected to the battery module 30, for example, the bottom of the buffer strip 40 is pressed onto the top of the battery module 30. There can be one buffer strip 40, covering the entire battery module 30 to absorb deformation of the cover 20. Alternatively, there can be multiple buffer strips 40, each positioned in a location within the cover 20 that is prone to deformation or has low structural strength, to improve the structural strength of the cover 20.

[0041] When the pressure on the lid 20 causes it to deform towards the buffer strip 40, the buffer strip 40, being elastic and malleable, can absorb the mechanical impact of the lid 20, thereby reducing or preventing the degree of deformation and enhancing the structural strength of the lid 20 and the battery pack. After the pressure on the lid 20 decreases or disappears, the elasticity of the buffer strip 40 helps the lid 20 return to its initial state, further reducing the degree of deformation.

[0042] The battery pack provided in this application has a receiving cavity 11 inside the housing 10, which allows the battery module 30 to be placed inside the receiving cavity 11, thereby protecting the battery module 30 through the housing 10. The housing cover 20 is fastened to the housing 10, so that the receiving cavity 11 is in a closed state when the housing cover 20 is closed to the housing 10, preventing the battery module 30 from sliding out of the housing 10. By connecting the bottom of the buffer strip 40 to the battery module 30 and the top of the buffer strip 40 to the housing cover 20, the buffer strip 40 is positioned between the battery module 30 and the housing cover 20, thereby absorbing the impact of the housing cover 20. Furthermore, by absorbing the impact of the housing cover 20, the buffer strip 40 reduces or avoids deformation of the battery pack housing cover 20, thereby improving the structural strength of the battery pack housing cover 20.

[0043] In some embodiments, as shown in FIG1, the battery module 30 includes a plurality of cell groups 31. Each cell group 31 includes a plurality of cells 311. The cell groups 31 are electrically connected to each other. The cell groups 31 are arranged sequentially along a first direction X. Referring to FIGS. 1 and 4, the first direction X can be the length direction of the housing 10.

[0044] Each battery cell group 31 includes multiple battery cells 311, and the battery cells 311 are electrically connected to each other. The battery cells 311 are arranged sequentially along the second direction Y. Referring to Figures 1 and 4, the second direction Y can be the width direction of the housing 10.

[0045] Each cell 311 has a cover plate 311a on its top, which is a structural component that encloses the cell housing 311b within the cell 311. For example, referring to Figure 4, the cell 311 includes a cover plate 311a and a housing 311b. The housing 311b has an opening, and the cover plate 311a is installed at the opening of the housing 311b and closes the opening of the housing 311b.

[0046] The buffer strip 40 is connected to the cover plate 311a. For example, the bottom of the buffer strip 40 is pressed onto the cover plate 311a so that when the buffer strip 40 absorbs the impact of the cover 20, it can be supported by the cover plate 311a, thereby further improving the structural strength of the cover 20 and the battery pack.

[0047] In some embodiments, as shown in FIG3, the battery cell 311 further includes a positive terminal and a negative terminal disposed on the cover plate 311a, the positive terminal and the negative terminal being structures in the battery cell 311 used for electrical connection with the outside world.

[0048] There is a first gap between the buffer strip 40 and the positive terminal post so that when the buffer strip 40 absorbs the impact of the cover 20, it avoids the buffer strip 40 from colliding with the positive terminal post, so as to avoid damage to the positive terminal post in the cell 311.

[0049] A second gap exists between the buffer strip 40 and the negative terminal post to prevent the buffer strip 40 from colliding with the negative terminal post when absorbing the impact of the cover 20, thereby preventing damage to the negative terminal post in the battery cell 311. The distance between the second gap and the first gap can be the same or different.

[0050] In some embodiments, as shown in FIG2, the buffer strip 40 includes a main body 41 and a reinforcing rib 42. The reinforcing rib 42 is disposed at the bottom of the main body 41 and can be an elongated protrusion disposed at the bottom of the main body 41.

[0051] The reinforcing rib 42 is pressed onto the cover plate 311a so that the bottom of the buffer strip 40 is connected to the battery cell 311. Along the thickness direction of the cover plate 311a, there is a first gap between the main body 41 and the positive terminal, for example, there is a first gap between the bottom of the main body 41 and the positive terminal, so that when the buffer strip 40 absorbs the impact of the cover 20, it avoids the buffer strip 40 from colliding with the positive terminal, thereby preventing damage to the positive terminal in the battery cell 311.

[0052] Along the thickness direction of the cover plate 311a, there is a second gap between the main body 41 and the negative terminal. For example, there is a second gap between the bottom of the main body 41 and the negative terminal so that when the buffer strip 40 absorbs the impact of the cover 20, it avoids the buffer strip 40 from colliding with the negative terminal, so as to avoid damage to the negative terminal in the cell 311.

[0053] Based on the above embodiments, as shown in Figure 4, the battery module 30 further includes multiple electrical connectors 32, and two adjacent cells 311 along the second direction Y are connected through the electrical connectors 32. All cells 311 in the same cell group 31 are electrically connected through the electrical connectors 32. A gap exists between the reinforcing rib 42 and the electrical connector 32. This is to prevent the buffer strip 40 from colliding with the electrical connector 32 when absorbing the impact of the cover 20, thus avoiding damage to the electrical connector 32.

[0054] In some embodiments, as shown in FIG4, any two adjacent positive terminals along the second direction Y are connected by an electrical connector 32. Similarly, any two adjacent negative terminals along the second direction Y are connected by an electrical connector 32. This allows any two adjacent cells 311 to be electrically connected along the second direction Y.

[0055] Based on the above embodiment, as shown in Figure 2, the reinforcing rib 42 includes a plurality of first reinforcing ribs 421. Each first reinforcing rib 421 can be arranged sequentially along the second direction Y, and each first reinforcing rib 421 extends along the first direction X.

[0056] As shown in Figure 4, the first reinforcing rib 421 is pressed onto the cover plate 311a, and the first reinforcing rib 421 is located between two adjacent electrical connectors 32 along the second direction Y. This prevents the buffer strip 40 from damaging the positive terminal, negative terminal, and electrical connectors 32.

[0057] In some embodiments, as shown in FIG2, the reinforcing rib 42 includes a plurality of second reinforcing ribs 422, and each second reinforcing rib 422 may be arranged sequentially along a first direction X. Each second reinforcing rib 422 extends along a second direction Y.

[0058] The second reinforcing rib 422 is pressed onto the cover plate 311a. As shown in Figure 4, the second reinforcing rib 422 is located between two adjacent electrical connectors 32 along the first direction X. This prevents the buffer strip 40 from damaging the positive terminal, negative terminal, and electrical connectors 32.

[0059] Based on the above embodiments, the cover 20 is configured as a vehicle body floor. The vehicle body floor is an important component of the vehicle body, located at the bottom of the vehicle, and supports equipment or occupants within the vehicle. The cover 20 can be an integral part of the vehicle body floor, with the cover 20 and the vehicle body floor sharing the same structure. Alternatively, the cover 20 can be a part of the vehicle body floor, for example, the cover 20 can be a portion of the vehicle body floor that supports the vehicle's seats. This allows the battery pack cover 20 to function as a vehicle body floor, supporting equipment or occupants within the vehicle.

[0060] This application also provides a vehicle, which may include, but is not limited to, pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric golf carts, electric trucks, etc., but the embodiments of this application are not limited thereto.

[0061] The vehicle includes a battery pack, the specific structure of which and its related effects can be found in the descriptions of the above embodiments. Since the vehicle provided in this application employs all the technical solutions of any of the above embodiments, it possesses at least all the beneficial effects brought about by any of the above embodiments, and will not be elaborated upon further here.

[0062] The various embodiments or implementation methods described in this specification are presented in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other.

[0063] It should be noted that phrases such as "in specific implementations," "in some embodiments," "in this embodiment," and "exemplarily" in the specification indicate that the described embodiments may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, such phrases do not necessarily refer to the same embodiment. Moreover, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments, whether explicitly described or not, is within the knowledge scope of those skilled in the art.

[0064] Generally speaking, terms should be understood at least in part by their use in context. For example, at least in part by context, the term "one or more" as used in the text can be used to describe any feature, structure, or characteristic of the singular meaning, or a combination of features, structures, or characteristics of the plural meaning. Similarly, at least in part by context, terms such as "a" or "the" can also be understood to convey either singular or plural usage.

[0065] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0066] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0067] It should be readily understood that the terms “on,” “above,” and “on top of” in this disclosure should be interpreted in the broadest possible sense, such that “on” means not only “directly on something” but also “on something” with an intermediate feature or layer therebetween, and that “above” or “on top of” means not only “on top of something” but also “on top of something” without an intermediate feature or layer therebetween (i.e., directly on something).

[0068] Furthermore, for ease of explanation, spatially relative terms such as "below," "below," "under," "above," and "above" may be used to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation other than those shown in the figures. The device may have other orientations (rotated 90 degrees or in other orientations), and the spatially relative descriptive terms used herein may be interpreted accordingly.

[0069] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A battery pack, comprising a housing (10), a cover (20), a battery module (30), and a buffer strip (40): The box (10) has a receiving cavity (11); The lid (20) is fastened to the box body (10) to close the receiving cavity (11); The battery module (30) is located inside the receiving cavity (11); The buffer strip (40) is used to absorb the impact of the box cover (20). The bottom of the buffer strip (40) is connected to the battery module (30), and the top of the buffer strip (40) is connected to the box cover (20).

2. The battery pack according to claim 1, wherein, The battery module (30) includes multiple cell groups (31); Each of the battery cell groups (31) is arranged sequentially along the first direction (X); Each of the battery cell groups (31) includes multiple battery cells (311), and each of the battery cells (311) is arranged sequentially along the second direction (Y). The top of each battery cell (311) has a cover plate (311a), and the buffer strip (40) is connected to the cover plate (311a).

3. The battery pack according to claim 2, wherein, The battery cell (311) also includes a positive terminal and a negative terminal disposed on the cover plate (311a), the buffer strip (40) has a first gap with the positive terminal, and the buffer strip (40) has a second gap with the negative terminal.

4. The battery pack according to claim 3, wherein, The buffer strip (40) includes a main body (41) and a reinforcing rib (42), wherein the reinforcing rib (42) is disposed at the bottom of the main body (41); The reinforcing rib (42) is pressed onto the cover plate (311a), and the main body (41) and the positive electrode post have the first spacing along the thickness direction of the cover plate (311a); Along the thickness direction of the cover plate (311a), the main body (41) and the negative electrode post have the second spacing.

5. The battery pack according to claim 4, wherein, The battery module (30) also includes a plurality of electrical connectors (32), and two adjacent cells (311) along the second direction (Y) are connected by electrical connectors (32); There is a gap between the reinforcing rib (42) and the electrical connector (32).

6. The battery pack according to claim 5, wherein, Along the second direction (Y), any two adjacent positive terminals are connected by one of the electrical connectors (32); Along the second direction (Y), any two adjacent negative terminals are connected by one of the electrical connectors (32).

7. The battery pack according to claim 6, wherein, The reinforcing rib (42) includes a plurality of first reinforcing ribs (421), each of the first reinforcing ribs (421) extending along the first direction (X), and the first reinforcing rib (421) being located between two adjacent electrical connectors (32) along the second direction (Y).

8. The battery pack according to claim 6 or 7, wherein, The reinforcing rib (42) includes a plurality of second reinforcing ribs (422), each of the second reinforcing ribs (422) extending along the second direction (Y), and the second reinforcing ribs (422) being located between two adjacent electrical connectors (32) along the first direction (X).

9. The battery pack according to any one of claims 1-7, wherein, The box cover (20) is configured as the vehicle floor.

10. A vehicle, wherein, Includes the battery pack as described in any one of claims 1-9.

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