A battery pack, a battery system, and a vehicle

Abstract

The application provides a battery pack, a battery system and a vehicle, and particularly relates to the technical field of batteries. The battery pack comprises a battery box, a first cell unit and a second cell unit. The battery box comprises a first frame and a second frame arranged in layers, the second frame is located above the first frame in a first direction, the first frame has a first end and a second end in a second direction, and the second frame is arranged close to the first end. The first cell unit is located in the first frame, and the second cell unit is located in the second frame. In this way, the battery pack provided by the application maximizes the use of the irregular structure of the bottom of the vehicle by arranging the battery box as a first frame and a second frame arranged in layers, so that the battery pack can better adapt to the relatively complex space of the bottom of the vehicle, and efficient space filling is achieved. In addition, the battery box with a double-layer frame structure can accommodate more cell units, increase the battery capacity of the battery pack, and improve the cruising range of the vehicle.

Description

Technical Field

[0001] This application relates to the field of battery technology, and more particularly to a battery pack, a battery system, and a vehicle. Background Technology

[0002] With technological advancements and the booming development of the new energy industry, power batteries have been widely used in many fields, including electric vehicles, renewable energy storage, consumer electronics, and industrial equipment. Among these, the battery pack, as the core component of a power battery system, is currently the primary method for integrating power battery systems.

[0003] With the development of new energy vehicles, some vehicles are choosing to transform into new energy models, modifying existing gasoline vehicle platforms for electrification. This involves utilizing the existing gasoline vehicle chassis architecture and removing components such as the engine, transmission, and fuel tank to make room for a battery pack, thus achieving electrification.

[0004] However, in existing vehicles, the chassis of traditional gasoline-powered cars were not designed with electrification in mind, and the existing battery pack structures are relatively simple and fixed. Therefore, the chassis structure and spatial layout are unsuitable for directly installing battery packs. Gasoline-powered car chassis typically have complex geometries and irregular spatial distributions, meaning that the space utilization and energy demand performance of battery packs need to be improved. Utility Model Content

[0005] This application provides a battery pack, a battery system, and a vehicle. By configuring the battery housing as a stacked first frame and second frame, the irregular structure of the vehicle's underside is utilized to the maximum extent, allowing the battery pack to better adapt to the complex space under the vehicle and achieve efficient space filling. Furthermore, the double-frame structure of the battery housing can accommodate more battery cells, increasing the battery pack's capacity and improving the vehicle's driving range.

[0006] The first aspect of this application provides a battery pack, comprising:

[0007] The battery housing includes a first frame and a second frame stacked together. The second frame is located above the first frame in a first direction. The first frame has a first end and a second end in a second direction. The second frame is located close to the first end.

[0008] The first battery cell unit is located in the first frame;

[0009] The second battery cell unit is located in the second frame.

[0010] The battery pack provided in the first aspect of this application includes a battery housing, a first battery cell unit, and a second battery cell unit. The battery housing includes a first frame and a second frame stacked together. The second frame is positioned above the first frame in a first direction, and the first frame has a first end and a second end in a second direction. The second frame is positioned close to the first end. The first battery cell unit is located within the first frame, and the second battery cell unit is located within the second frame. Thus, the battery pack provided in this application, by configuring the battery housing as a stacked first and second frame, maximizes the use of the irregular structure of the vehicle's underside, allowing the battery pack to better adapt to the complex space under the vehicle and achieve efficient space filling. Furthermore, the double-frame structure of the battery housing can accommodate more battery cell units, increasing the battery pack's capacity and improving the vehicle's driving range.

[0011] In one possible implementation, in the second direction, the first frame encloses a first cavity, the first cavity including a mounting area and an electrical connection area, the mounting area being located at a first end and the electrical connection area being located at a second end;

[0012] The projection of the second frame toward the first frame is within the installation area.

[0013] In one possible implementation, the first frame includes a bracket located on both sides of the first cell unit in the mounting area in a second direction.

[0014] The bracket has a protrusion that protrudes toward the second frame in the first direction, and the protrusion is used to support the second frame.

[0015] In one possible implementation, it further includes: a first liquid cooling plate and a second liquid cooling plate;

[0016] The first liquid cooling plate is located below the first frame in the first direction, the second liquid cooling plate is located below the second frame in the first direction, and the second liquid cooling plate is located between the second frame and the protrusion of the bracket.

[0017] In one possible implementation, it further includes a lug, which is fixed to the second frame by fasteners and is located close to the first end.

[0018] In one possible implementation, it further includes: a plug-in panel, which is fixedly connected to the second end of the first frame;

[0019] The plug-in panel is used to connect and communicate the battery pack with external systems.

[0020] In one possible implementation, the first frame includes side borders located on both sides of the first frame in a third-direction orientation;

[0021] A reinforcing member is provided on the side of the side frame facing away from the first cavity. In the first direction, the size of the end of the reinforcing member closer to the side frame is greater than or equal to the size of the end of the reinforcing member farther from the side frame.

[0022] In one possible implementation, the first frame further includes crossbeams, a plurality of crossbeams being evenly distributed in the first cavity along a second direction, and the two ends of the crossbeams in the third direction being connected to the side frame respectively.

[0023] A second aspect of this application provides a battery system including the battery pack described above.

[0024] A third aspect of this application provides a vehicle including the aforementioned battery system.

[0025] It should be understood that the second and third aspects of this application correspond to the technical solutions of the first aspect of this application, and the beneficial effects achieved by each aspect and the corresponding feasible implementation are similar, and will not be repeated here.

[0026] In addition to the technical problems solved by this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions as described above, other technical problems that can be solved by a battery pack, battery system, and vehicle provided by this application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific embodiments. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only a part of the embodiments of this application. These drawings and text descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

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

[0029] Figure 2 This is a structural schematic diagram of the battery pack provided in an embodiment of this application from another angle;

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

[0031] Figure 4 A partial structural diagram illustrating the cooperation between the lifting lugs and the second frame of the battery pack provided in an embodiment of this application;

[0032] Figure 5 This is a partial structural diagram showing the cooperation between the reinforcing member and the side frame of the battery pack provided in an embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100-battery pack;

[0035] 200-Battery housing; 210-First frame; 211-First end; 212-Second end; 213-First cavity; 2131-Mounting area; 2132-Electrical connection area; 214-Bracket; 2141-Protrusion; 215-Side frame; 216-Reinforcing member; 217-Crossbeam; 218-Cell cavity; 220-Second frame; 221-Second cavity;

[0036] 300 - First liquid cooling plate;

[0037] 400 - Second liquid cooling plate;

[0038] 500-Hanging lug;

[0039] 600-Plug-in Panel. Detailed Implementation

[0040] 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 the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0041] As described in the background section, in existing vehicles, the chassis of traditional gasoline-powered vehicles were not designed with electrification in mind, and the existing battery pack structures are relatively simple and fixed. Therefore, the vehicle chassis structure and spatial layout are unsuitable for direct installation of battery packs. Gasoline-powered vehicle chassis typically have complex geometries and irregular spatial distributions, which means that the space utilization and energy demand performance of battery packs need to be improved.

[0042] To address the aforementioned technical problems, the first aspect of this application provides a battery pack. The battery pack includes a battery housing, a first battery cell unit, and a second battery cell unit. The battery housing includes a first frame and a second frame stacked together. The second frame is positioned above the first frame in a first direction, and the first frame has a first end and a second end in a second direction. The second frame is positioned close to the first end. The first battery cell unit is located within the first frame, and the second battery cell unit is located within the second frame. Thus, the battery pack provided by this application, by configuring the battery housing as a stacked first and second frame, maximizes the utilization of the irregular structure of the vehicle's underside, allowing the battery pack to better adapt to the complex space under the vehicle and achieve efficient space filling. Furthermore, the double-layer frame structure of the battery housing can accommodate more battery cell units, increasing the battery capacity of the battery pack and improving the vehicle's driving range.

[0043] A second aspect of this application provides a battery system. The vehicle includes the aforementioned battery pack.

[0044] A third aspect of this application provides a vehicle. The vehicle includes the battery system described above.

[0045] 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.

[0046] This application provides a battery pack, a battery system, and a vehicle. By configuring the battery housing as a stacked first frame and second frame, the irregular structure of the vehicle's underside is utilized to the maximum extent, allowing the battery pack to better adapt to the complex space under the vehicle and achieve efficient space filling. Furthermore, the double-layer frame structure of the battery housing can accommodate more battery cells, increasing the battery pack's capacity and improving the vehicle's driving range. The specific structure of the battery pack, battery system, and vehicle provided in this application embodiment will be described below with reference to the accompanying drawings.

[0047] refer to Figure 1 as well as Figure 2This application provides a battery pack 100 in a first aspect. The battery pack 100 may include a battery housing 200, a first battery cell unit (not shown in the figure), and a second battery cell unit (not shown in the figure). In one possible implementation, the number of both the first and second battery cell units can be multiple; this application does not limit the number of the first and second battery cell units. In this application embodiment, both the first and second battery cell units are located within the battery housing 200.

[0048] Continue to refer to Figure 1 as well as Figure 2 Based on the above embodiments, the battery housing 200 may include a first frame 210 and a second frame 220. In one possible implementation, the first frame 210 and the second frame 220 may be stacked in a first direction, with the second frame 220 positioned above the first frame 210 in that direction. Additionally, the first frame 210 may have a first end 211 and a second end 212 in a second direction, and the second frame 220 may be positioned close to the first end 211. In this embodiment, the second frame 220 may be fixedly connected to the first frame 210. It is understood that the first battery cell unit may be located in the first frame 210, and the second battery cell unit may be located in the second frame 220.

[0049] In this way, by configuring the battery housing 200 as a stacked first frame 210 and second frame 220, the irregular structure of the vehicle's bottom is utilized to the maximum extent, allowing the battery pack 100 to better adapt to the complex space under the vehicle and achieve efficient space filling. In addition, the double-frame structure of the battery housing 200 can also accommodate more battery cells, increasing the battery capacity of the battery pack 100 and improving the vehicle's driving range.

[0050] It should be noted that, for ease of description, in this embodiment, the first direction can be the height direction of the battery housing 200, i.e. Figure 1 The x-direction. The second direction can be the length direction of the battery box (200), i.e. Figure 1 The y-direction. The third direction can be the width direction of the battery box 200, i.e. Figure 1 The z-direction in the equation.

[0051] Continue to refer to Figure 1 Based on the above embodiments, in one possible implementation, the first frame 210, the second frame 220, the first battery cell unit, and the second battery cell unit can all be rectangular structures; this application embodiment does not impose any limitations on this. In this application embodiment, the first frame 210 can enclose a first cavity 213, and several first battery cell units can be located within the first cavity 213. Correspondingly, as... Figure 3 As shown, the second frame 220 can surround the second cavity 221, and several second cell units can be located in the second cavity 221.

[0052] Continue to refer to Figure 1 Based on the above embodiments, in one possible implementation, the first cavity 213 may further include a mounting area 2131 and an electrical connection area 2132. In this embodiment, the mounting area 2131 may be located at the first end 211, while the electrical connection area 2132 may be located at the second end 212. It is understood that, in the first direction, the second frame 220 may be disposed on the mounting area 2131, and the projection of the second frame 220 toward the first frame 210 is located in the mounting area 2131. In this way, the second frame 220 can be disposed on the mounting area 2131 of the first frame 210 according to the structure of the vehicle bottom, which can make more reasonable use of the space at the bottom of the vehicle and increase the overall battery capacity of the battery pack 100.

[0053] Continue to refer to Figure 1 Based on the above embodiments, the first frame 210 may include a bracket 214. The bracket 214 may be located on both sides of the first battery cell unit in the mounting area 2131 in the second direction. In one possible implementation, the bracket 214 may have a protrusion 2141 in the first direction. The protrusion 2141 may protrude toward the second frame 220. It is understood that the protrusion 2141 can be used to support the second frame 220. Thus, the protrusion 2141 on the bracket 214 can abut against the second frame 220, thereby fixing the bracket 214 and the second frame 220 together by a fastener.

[0054] Continue to refer to Figure 1Based on the above embodiments, the battery pack 100 may further include a first liquid cooling plate 300 and a second liquid cooling plate 400. The first liquid cooling plate 300 may be located below the first frame 210 in a first direction. Correspondingly, the second liquid cooling plate 400 may also be located below the second frame 220 in the first direction, and the second liquid cooling plate 400 is located between the second frame 220 and the protrusion 2141 of the bracket 214. In this embodiment, the first liquid cooling plate 300 may be fixedly connected to the bottom surface of the first frame 210. Correspondingly, the second liquid cooling plate 400 may be fixedly connected to the bottom surface of the second frame 220. In one possible implementation, the first liquid cooling plate 300 and the second liquid cooling plate 400 may be fixedly connected to the first frame 210 and the second frame 220 respectively using flow drill screws; this embodiment is not limited thereto. It is understood that the first liquid cooling plate 300 can dissipate heat from the first battery cell, while the second liquid cooling plate 400 can dissipate heat from the second battery cell. The cooling effect of the first liquid cooling plate 300 and the second liquid cooling plate 400 can reduce the temperature of the entire battery pack 100, reduce the possibility of thermal runaway, and improve vehicle safety.

[0055] refer to Figure 4 Based on the above embodiments, the battery pack 100 may further include: a hanging lug 500. Wherein, combined with Figure 1 The lifting lug 500 can be fixed to the second frame 220 by fasteners, and the lifting lug 500 can be positioned close to the first end 211. In one possible implementation, the fastener can be a bolt, and the lifting lug 500 can be bolted to the second frame 220, thereby saving costs. In this embodiment, it is understood that the lifting lug 500 can be used to fix the battery pack 100 to the chassis or body structure of the vehicle. Through the connection between the lifting lug 500 and the second frame 220, the battery pack 100 can be securely installed in a preset position on the vehicle, ensuring that it will not shift or loosen during vehicle operation.

[0056] In this embodiment of the application, the lifting lug 500 can be a cast aluminum part made by die casting, and this embodiment of the application is not limited thereto. It is understood that the lifting lug 500 can be set to match fixing points of different heights in the vehicle, which facilitates the installation of the battery pack 100 and thus reduces the cost of the battery pack 100.

[0057] Continue to refer to Figure 1Based on the above embodiments, the battery pack 100 may further include a plug-in panel 600. The plug-in panel 600 may be fixedly connected to the second end 212 of the first frame 210. In one possible implementation, the plug-in panel 600 may protrude from the first frame 210 along a second direction and in a direction opposite to the second frame 220. It is understood that the plug-in panel 600 can be used to connect and communicate between the battery pack 100 and an external system. Exemplarily, the plug-in panel 600 can output electrical energy from the battery pack 100 to the vehicle's electrical system, or be used to receive charging current.

[0058] For example, the plug-in panel 600 can be a cast aluminum part manufactured by die casting, and the plug-in panel 600 can be an irregular, non-standard structure; this application embodiment is not limited thereto. It is understood that the plug-in panel 600 provided in this application embodiment can meet the plug-in installation requirements and also reduces the cost of the battery pack 100. Furthermore, the plug-in panel 600 is fixedly connected to the first frame 210 and located outside the first frame 210, increasing the internal net space of the battery pack 100.

[0059] Continue to refer to Figure 1 Based on the above embodiments, the first frame 210 may further include side borders 215. The side borders 215 may be located on both sides of the first frame 210 in a third-direction orientation. In one possible implementation, as... Figure 5 As shown, the side frame 215 can extend in a direction upward and away from the first cavity 213, thereby increasing the width of the side frame 215. This provides a larger contact area, which helps to improve the stability of the first frame 210 and ensures that the battery box 200 is more securely fixed to the vehicle chassis.

[0060] Continue to refer to Figure 5 Based on the above embodiments, in one possible implementation, a reinforcing member 216 may be provided on the side of the side frame 215 facing away from the first cavity 213. The number of reinforcing members 216 can be several, and this application embodiment does not limit the number. In this application embodiment, in the first direction, the dimension of the end of the reinforcing member 216 near the side frame 215 can be greater than or equal to the dimension of the end of the reinforcing member 216 away from the side frame 215, so that the reinforcing rib is inclinedly disposed on the side frame 215.

[0061] In this way, the reinforcement 216 significantly improves the structural strength and rigidity of the battery housing 200, better resisting external impacts and vibrations and protecting the internal battery cells from damage. Furthermore, the tilted arrangement of the reinforcement 216 helps improve the torsional stiffness of the battery housing 200, effectively reducing structural deformation caused by torsion. It also reduces the amount of material used, thereby reducing the overall weight of the battery pack 100 and achieving lightweighting of the battery pack 100.

[0062] Continue to refer to Figure 1 Based on the above embodiments, the first frame 210 may further include crossbeams 217. In one possible implementation, the number of crossbeams 217 can be several; however, this embodiment does not limit the number of crossbeams 217. In this embodiment, several crossbeams 217 can be evenly distributed along the second direction in the first cavity 213, and the two ends of each crossbeam 217 in the third direction are respectively connected to the side frame 215. Thus, the several crossbeams 217 can divide the first cavity 213 into several cell cavities 218, and several first cell units can be respectively located in the several cell cavities 218.

[0063] In this embodiment, the battery pack 100 can adopt a CTP (Cell-to-Pack) structure. In this way, by directly integrating the cell unit into the battery pack 100, the module level and related connectors are eliminated, thereby increasing the space utilization of the battery pack 100 in the first direction and improving the energy density and efficiency of the battery pack 100.

[0064] In the embodiments of this application, it can be understood that the first frame 210 can be fixed in the space at the bottom of the vehicle first, and then the second frame 220 can be fixed to the first frame 210 as a whole by fasteners, thereby forming a battery box 200 with a double-layer frame structure.

[0065] This application provides a battery system (not shown in the figures) in a second aspect. The battery system may include the battery pack 100 described above.

[0066] This application provides a vehicle (not shown in the figures) in a third aspect. The vehicle may include the battery system described above.

[0067] In this embodiment, the battery pack 100 provided in this application embodiment maximizes the use of the irregular structure of the vehicle's bottom by setting the battery box 200 as a stacked first frame 210 and second frame 220. This allows the battery pack 100 to better adapt to the relatively complex space under the vehicle, achieving efficient space filling. In addition, the double-frame structure of the battery box 200 can also accommodate more battery cells, increasing the battery capacity of the battery pack 100 and improving the vehicle's driving range.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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).

[0072] 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.

[0073] Finally, it should be noted that other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and alterations may be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A battery pack, characterized in that, include: A battery housing (200) includes a first frame (210) and a second frame (220) stacked together. The second frame (220) is located above the first frame (210) in a first direction. The first frame (210) has a first end (211) and a second end (212) in a second direction. The second frame (220) is disposed close to the first end (211). The first battery cell unit is located in the first frame (210); The second battery cell unit is located in the second frame (220).

2. The battery pack according to claim 1, characterized in that, In the second direction, the first frame (210) surrounds a first cavity (213), the first cavity (213) including a mounting area (2131) and an electrical connection area (2132), the mounting area (2131) being located at the first end (211) and the electrical connection area (2132) being located at the second end (212); The projection of the second frame (220) toward the first frame (210) is located in the mounting area (2131).

3. The battery pack according to claim 2, characterized in that, The first frame (210) includes a bracket (214) located on both sides of the first cell unit in the mounting area (2131) in the second direction; The bracket (214) has a protrusion (2141) protruding toward the second frame (220) in the first direction, the protrusion (2141) being used to support the second frame (220).

4. The battery pack according to claim 3, characterized in that, Also includes: First liquid cooling plate (300) and second liquid cooling plate (400); The first liquid cooling plate (300) is located below the first frame (210) in the first direction, the second liquid cooling plate (400) is located below the second frame (220) in the first direction, and the second liquid cooling plate (400) is located between the second frame (220) and the protrusion (2141) of the bracket (214).

5. The battery pack according to any one of claims 1-4, characterized in that, Also includes: A lifting lug (500) is fixed to the second frame (220) by fasteners, and the lifting lug (500) is disposed close to the first end (211).

6. The battery pack according to any one of claims 1-4, characterized in that, Also includes: A plug-in panel (600) is fixedly connected to the second end (212) of the first frame (210); The plug-in panel (600) is used to connect and communicate the battery pack with external systems.

7. The battery pack according to any one of claims 2-4, characterized in that, The first frame (210) includes side borders (215) located on both sides of the first frame (210) in the third direction; A reinforcing member (216) is provided on the side of the side frame (215) facing away from the first cavity (213). In the first direction, the size of the end of the reinforcing member (216) near the side frame (215) is greater than or equal to the size of the end of the reinforcing member (216) away from the side frame (215).

8. The battery pack according to claim 7, characterized in that, The first frame (210) also includes crossbeams (217), a plurality of the crossbeams (217) are evenly distributed in the first cavity (213) along the second direction, and the two ends of the crossbeams (217) in the third direction are respectively connected to the side frame (215).

9. A battery system, characterized in that, It includes several battery packs (100) as described in any one of claims 1-8 above.

10. A vehicle, characterized in that, Includes the battery system described in claim 9 above.

Images