A battery assembly and an electric vehicle having the same

Abstract

The application provides a battery assembly and an electric vehicle with the same, and the battery assembly comprises a vehicle frame, a receiving cavity is formed in the vehicle frame, and a battery cell is arranged in the receiving cavity, wherein the battery cell is in a columnar structure, the battery cell has one or more layers arranged along the height direction of the vehicle frame, each layer of the battery cell has a plurality of battery cells arranged along the length direction of the vehicle frame, the axis of each battery cell is arranged in parallel along the width direction of the vehicle frame, and each battery cell is connected with the side wall of the receiving cavity. In the application, the vehicle frame is used as the box body of the battery assembly, the battery cell is arranged in the receiving cavity of the vehicle frame, and the internal space of the vehicle frame is fully utilized without occupying the internal space of the vehicle body; the battery cell is connected with the side wall of the receiving cavity, the end of the battery cell can be bonded with the side wall of the receiving cavity, and the end of the battery cell can also be inserted with the side wall of the receiving cavity, and the connection mode is simple; since the box body of the battery assembly is used as the vehicle frame, the battery assembly does not need to be assembled with the whole vehicle, and the assembly process of the battery assembly is simplified.

Description

Technical Field

[0001] This invention relates to the technical field of power batteries, and more specifically, to a battery assembly and an electric vehicle having the same. Background Technology

[0002] As a key component of new energy vehicles, the structural integration performance of power batteries is extremely important. Currently, the mainstream battery assembly solutions are standard modules or CTP (Cell-to-Pack) battery assemblies. These two solutions have relatively complex structures, are limited by the height of the Z-axis arrangement, have low integration, and poor performance in assembly with the vehicle.

[0003] There is currently no effective solution to the above problems. Summary of the Invention

[0004] The main objective of this invention is to provide a battery assembly and an electric vehicle having the same, in order to solve the problems of current battery assembly layout being limited by vehicle height, low integration with the vehicle, and complex assembly.

[0005] To achieve the above objectives, according to one aspect of the present invention, a battery assembly is provided, comprising: a frame having a receiving cavity formed thereon; and a battery cell having a columnar structure, the battery cell being disposed within the receiving cavity, the battery cell having one or more layers arranged along the height direction of the frame, each layer having multiple cells arranged along the length direction of the frame, wherein the axis of each battery cell is arranged parallel to the width direction of the frame, and each battery cell is connected to the sidewall of the receiving cavity.

[0006] Furthermore, there is a gap between two adjacent cells.

[0007] Furthermore, a heat-conducting portion is provided at at least one axial end of the battery cell, the heat-conducting portion being coaxially arranged with the battery cell, and at least a portion of the heat-conducting portion extending out from the receiving cavity.

[0008] Furthermore, the battery cell has a first shaft end and a second shaft end, a first heat-conducting part is provided at the first shaft end, and a second heat-conducting part is provided at the second shaft end, with at least a portion of the first heat-conducting part and at least a portion of the second heat-conducting part extending out from the receiving cavity.

[0009] Furthermore, the length of the first heat-conducting part is L1, and the length of the second heat-conducting part is L2, where L1 < L2.

[0010] Furthermore, the heat-conducting part is a columnar structure made of metal.

[0011] Furthermore, mounting holes are provided on the side wall of the receiving cavity, and the battery cell is inserted into the mounting holes. The diameter of the mounting holes is larger than the diameter of the battery cell, and the battery cell is bonded to the mounting holes with thermally conductive adhesive.

[0012] Furthermore, multiple support plates are provided inside the cavity, and the multiple support plates are arranged along the width direction of the frame. The support plates are provided with clearance holes, and the battery cell passes through the clearance holes and connects to the side wall of the cavity.

[0013] Furthermore, it also includes a liquid cooling plate, which is formed at the bottom of the receiving cavity and is used for heat exchange with the battery cell.

[0014] According to another aspect of the present invention, an electric vehicle is provided, including a battery assembly, the battery assembly being the aforementioned battery assembly.

[0015] Applying the technical solution of this invention, a receiving cavity is formed on the frame, that is, the frame serves as the housing of the battery assembly, and the battery cells are placed inside the receiving cavity of the frame, making full use of the internal space of the frame without occupying the internal space of the vehicle body; wherein, the battery cells adopt a columnar structure and are connected to the side wall of the receiving cavity, the ends of the battery cells can be bonded to the side wall of the receiving cavity, and the ends of the battery cells can also be inserted into the side wall of the receiving cavity, the connection method is simple; since the housing part of the battery assembly serves as the frame, the battery assembly does not need to be reassembled with the vehicle, simplifying the assembly process of the battery assembly, and the integration degree of the battery assembly with the vehicle is high. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A schematic diagram of a battery assembly according to an embodiment of the present invention is shown;

[0018] Figure 2 A schematic diagram of the structure of a vehicle frame according to an embodiment of the battery assembly of the present invention is shown;

[0019] Figure 3 A schematic diagram of the structure of a cell in a battery assembly according to the present invention is shown;

[0020] Figure 4 It shows Figure 1 A top-down view.

[0021] The above figures include the following reference numerals:

[0022] 100. Frame; 101. Wheel; 102. Support plate; 103. Mounting hole; 104. Fixture; 105. Suspension structure;

[0023] 200. Battery cell; 201. First heat-conducting part; 202. Second heat-conducting part;

[0024] 300. Liquid cooling plate. Detailed Implementation

[0025] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0026] 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.

[0027] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0028] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0029] Combination Figures 1 to 4 As shown, according to a specific embodiment of this application, a battery assembly is provided.

[0030] like Figure 1As shown, the battery assembly includes a frame 100 and battery cells 200. The frame 100 has a housing cavity formed thereon, serving as the casing of the battery assembly. The battery cells 200 have a cylindrical structure and are disposed within the housing cavity. Each layer of battery cells 200 has one or more layers arranged along the height direction of the frame 100, and each layer has multiple cells arranged along the length direction of the frame 100. The axis of each battery cell 200 is parallel to the width direction of the frame, and each battery cell 200 is connected to the sidewall of the housing cavity. Specifically, the battery cells 200 have multiple layers arranged along the height direction of the frame, and the ends of the battery cells 200 can be bonded to the sidewall of the housing cavity, or they can be inserted into the sidewall of the housing cavity. Among them, the battery cell 200 adopts a full-size cylindrical ternary lithium-ion battery cell 200, the length of the battery cell 200 is greater than or equal to 600mm, and the cross-sectional radius of the battery cell 200 is greater than or equal to 30mm.

[0031] In the embodiments of this application, a receiving cavity is formed on the frame 100, that is, the frame 100 serves as the housing of the battery assembly, and the battery cell 200 is disposed within the receiving cavity of the frame 100, making full use of the internal space of the frame 100 without occupying the internal space of the vehicle body. The battery cell 200 adopts a columnar structure and is connected to the side wall of the receiving cavity. The end of the battery cell 200 can be bonded to the side wall of the receiving cavity, or the end of the battery cell 200 can be inserted into the side wall of the receiving cavity, simplifying the connection method. Since the housing part of the battery assembly serves as the frame 100, the battery assembly does not require secondary assembly with the vehicle, simplifying the assembly process of the battery assembly and resulting in a high degree of integration between the battery assembly and the vehicle.

[0032] like Figure 1 As shown, there is a space between two adjacent battery cells 200. This space provides convection space for the battery cells 200, allowing heat to be dissipated through convection. Simultaneously, the space also provides expansion space for the battery cells 200 during charging and discharging, preventing damage due to expansion and compression.

[0033] like Figure 1 As shown, the battery cell 200 is inserted into the side wall of the housing cavity of the frame 100. A heat-conducting portion is provided at at least one axial end of the battery cell 200, coaxially arranged with the battery cell 200, and at least a portion of the heat-conducting portion extends out of the housing cavity. The heat-conducting portion extending from the housing cavity can quickly dissipate heat from the battery cell 200. The heat-conducting portion is a columnar structure made of metal, and is securely connected to the end of the battery cell 200. Specifically, the heat-conducting portion is bonded to the end of the battery cell 200 using thermally conductive adhesive, which enhances the thermal conductivity of the battery cell 200.

[0034] like Figure 3As shown, the battery cell 200 has a first shaft end and a second shaft end. A first heat-conducting part 201 is provided at the first shaft end, and a second heat-conducting part 202 is provided at the second shaft end. At least a portion of the first heat-conducting part 201 and at least a portion of the second heat-conducting part 202 extend from the receiving cavity. The battery cell 200 dissipates heat through convection with the air via the first heat-conducting part 201 and the second heat-conducting part 202. The length of the first heat-conducting part 201 is L1, and the length of the second heat-conducting part 202 is L2, wherein L1 < L2.

[0035] Specifically, such as Figure 4 As shown, the length of the first heat-conducting part 201 extending out of the receiving cavity is L3, and the length of the second heat-conducting part 202 extending out of the receiving cavity is L4, wherein L3 < L4. The second heat-conducting part 202 serves as the primary heat-conducting structure, and the first heat-conducting part 201 serves as the secondary heat-conducting structure. Both of them convect with the air to dissipate heat from the battery cell 200.

[0036] like Figure 2 As shown, a mounting hole 103 is provided on the side wall of the receiving cavity. The battery cell 200 is inserted into the mounting hole 103. The diameter of the mounting hole 103 is larger than the diameter of the battery cell 200. The battery cell 200 and the mounting hole 103 are bonded together with thermally conductive adhesive. The thermally conductive adhesive can transfer some of the heat from the battery cell 200 to the frame 100. The frame 100 achieves heat exchange with the battery cell 200 through air convection. The diameter of the mounting hole 103 is larger than the diameter of the battery cell 200. The thermally conductive adhesive has a certain elastic cushioning property to prevent rigid contact between the battery cell 200 and the mounting hole 103 and to prevent damage to the end of the battery cell 200.

[0037] Furthermore, the mounting holes 103 have multiple rows distributed along the length direction of the frame 100, and each row of mounting holes 103 has multiple holes spaced apart along the height direction of the frame 100. The number of mounting holes 103 in adjacent rows is different, and the centers of two adjacent mounting holes 103 are not on the same horizontal line. Since the battery cells 200 are inserted into the mounting holes 103 in a one-to-one correspondence, the arrangement of the mounting holes 103 represents the arrangement of the battery cells 200. Specifically, as shown... Figure 2As shown, the number of mounting holes 103 in any two adjacent rows are 2 and 3 respectively. Since the centers of two adjacent mounting holes 103 are not on the same horizontal line, the mounting holes 103 are distributed in five layers along the height direction of the frame 100. The mounting holes 103 in each layer are equally spaced along the length direction of the frame 100. Compared to a scheme with 2 mounting holes 103 per row, this increases the number of mounting holes 103, thus increasing the number of battery cells 200, which helps to enhance the driving range. Compared to a scheme with 3 mounting holes 103 per row, the staggered arrangement of two adjacent mounting holes 103 provides sufficient heat dissipation space for the battery cells 200. Simultaneously, the staggered arrangement of two adjacent mounting holes 103 allows for a shorter distance between them compared to the non-staggered arrangement, which can meet the installation requirements of the battery cells 200. To enhance the stability between the battery cell 200 and the frame 100 and prevent the battery cell 200 from bending and being damaged due to vibration during vehicle operation, multiple support plates 102 are provided inside the receiving cavity. These support plates 102 are arranged along the width direction of the frame 100, and each support plate 102 has clearance holes. The battery cell 200 passes through these clearance holes and connects to the side wall of the receiving cavity. The support plates 102 increase the number of support points for the battery cell 200, thereby increasing its assembly rigidity and stability. Specifically, the battery cell 200 connects to the side wall of the receiving cavity through the clearance holes. The diameter of the clearance holes is larger than the radial dimension of the battery cell 200, and the walls of the clearance holes can be coated with thermally conductive adhesive, which serves both as a cushioning mechanism and a heat conductor.

[0038] To further enhance the heat exchange performance of the battery pack, a liquid cooling plate 300 is provided at the bottom of the frame 100. The liquid cooling plate 300 is formed at the bottom of the housing cavity and is used for heat exchange with the battery cells 200. That is, the liquid cooling plate 300 serves as the bottom plate of the housing cavity, further improving the integration of the battery pack.

[0039] According to another aspect of the present invention, an electric vehicle is provided, including a battery assembly, which is the battery assembly described in the above embodiments.

[0040] Specifically, the front and rear ends of the frame 100 are respectively connected to the fixing brackets 104, and the fixing brackets 104 are welded to the frame 100. Suspension structures 105 are respectively provided on the left and right sides of the fixing brackets 104, and the wheels 101 are connected to the suspension structures 105.

[0041] 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.

[0042] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0043] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0044] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A battery assembly, characterized in that, include: A frame (100) having a receiving cavity formed thereon; The battery cell (200) has a columnar structure and is disposed in the receiving cavity. The battery cell (200) has one or more layers arranged along the height direction of the frame (100). Each layer of the battery cell (200) has multiple layers arranged along the length direction of the frame (100). The axis of each battery cell (200) is arranged parallel to the width direction of the frame (100). Each battery cell (200) is connected to the side wall of the receiving cavity. A heat-conducting portion is provided at at least one axial end of the battery cell (200), the heat-conducting portion is coaxially arranged with the battery cell (200), and at least a portion of the heat-conducting portion extends out from the receiving cavity; The cavity has a mounting hole (103) on its side wall. The battery cell (200) is inserted into the mounting hole (103). The diameter of the mounting hole (103) is larger than the diameter of the battery cell (200). The battery cell (200) and the mounting hole (103) are bonded together with thermally conductive adhesive.

2. The battery assembly according to claim 1, characterized in that, There is a gap between two adjacent cells (200).

3. The battery assembly according to claim 1, characterized in that, The battery cell (200) has a first shaft end and a second shaft end. A first heat-conducting part (201) is provided at the first shaft end, and a second heat-conducting part (202) is provided at the second shaft end. At least a portion of the first heat-conducting part (201) and at least a portion of the second heat-conducting part (202) extend out from the receiving cavity.

4. The battery assembly according to claim 3, characterized in that, The length of the first heat-conducting part (201) is L1, and the length of the second heat-conducting part (202) is L2, wherein L1 < L2.

5. The battery assembly according to claim 1, characterized in that, The heat-conducting part is a columnar structure made of metal.

6. The battery assembly according to claim 1, characterized in that, The cavity is provided with a plurality of support plates (102), which are arranged along the width direction of the frame (100). The support plates (102) are provided with clearance holes, and the battery cell (200) passes through the clearance holes and connects to the side wall of the cavity.

7. The battery assembly according to any one of claims 1-6, characterized in that, Also includes: A liquid cooling plate (300) is formed at the bottom of the receiving cavity and is used to exchange heat with the battery cell (200).

8. An electric vehicle, comprising a battery assembly, characterized in that, The battery assembly is the battery assembly according to any one of claims 1-7.

Images