Detachable frame structure and battery pack

Abstract

The utility model belongs to the technical field of batteries, and discloses a detachable frame structure and a battery pack, the detachable frame structure comprises a frame body and a protective sealing assembly, the frame body comprises a semi-closed frame and a rear side plate, the semi-closed frame is provided with an opening along a first direction, and the rear side plate is detachably sealed on the opening of the semi-closed frame; the protective sealing assembly comprises a sealing strip and a fastener, the sealing strip is arranged between the semi-closed frame and the rear side plate, and the fastener is connected with the semi-closed frame, the rear side plate and the sealing strip. According to the detachable frame structure disclosed by the utility model, on the premise that the protection level of the battery pack is ensured, the subsequent disassembly and maintenance are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a detachable frame structure and a battery pack. Background Art

[0002] Currently, with the continuous improvement of battery pack manufacturing, most current battery packs use module-free technology to directly integrate battery cells into battery packs, forming a module-free power battery pack structure. Compared with the traditional "battery cell-module-battery pack" three-level structure, this structure omits the module assembly step, reduces the number of components inside the battery pack, and improves the energy density of the battery pack. However, in the existing technology, battery packs integrated using this module-free technology require the battery cells to be glued and fixed to the liquid cooling plate, and the frame used to place the battery cells usually adopts a monolithic structure. Therefore, if a battery cell fails during use, it is impossible to repair the individual battery cell, and the entire battery pack needs to be replaced, resulting in high maintenance costs. Utility Model Content

[0003] The purpose of the present utility model is to provide a detachable frame structure and a battery pack, which ensure the protection level of the detachable structure through a protective sealing component, and by adopting a detachable structure, the battery pack can be easily disassembled and repaired while ensuring the protection level.

[0004] To achieve this purpose, the present invention adopts the following technical solutions:

[0005] In one aspect, a detachable frame structure is provided, comprising a frame body and a protective sealing assembly, wherein the frame body comprises a semi-enclosed frame and a rear side plate, the semi-enclosed frame having an opening along a first direction, and the rear side plate being detachably sealed on the opening of the semi-enclosed frame;

[0006] The protective sealing assembly includes a sealing strip and a fastener. The sealing strip is arranged between the semi-enclosed frame and the rear side plate. The fastener connects the semi-enclosed frame, the rear side plate and the sealing strip respectively.

[0007] In one embodiment, the frame body includes a liquid-cooling base plate, a liquid-cooling tube and a side plate. The liquid-cooling base plate is provided with a liquid-cooling channel connected to the liquid-cooling tube. The side plate includes a first side plate, a second side plate, a front side plate and a rear side plate arranged around the liquid-cooling base plate. The liquid-cooling base plate, the first side plate, the second side plate, the front side plate and the liquid-cooling tube are fixedly connected to form the semi-enclosed frame.

[0008] In one embodiment, the first side plate and the second side plate are respectively arranged on two opposite sides of the liquid cooling base plate, and the front side plate and the rear side plate are respectively arranged on the other two opposite sides of the liquid cooling base plate;

[0009] The liquid cooling pipe is arranged on a side where the semi-enclosed frame is connected to the rear side plate, and the liquid cooling pipe is respectively connected to the liquid cooling bottom plate, the first side plate, the second side plate and the rear side plate.

[0010] In one embodiment, the rear side plate includes a connecting plate and a base arranged at an angle, the connecting plate is connected to the first side plate and the second side plate respectively, and the bottom of the base is connected to the liquid cooling pipe.

[0011] In one embodiment, the sealing strip includes a first sealing portion and a second sealing portion, the first sealing portion is arranged between the rear side plate and the first side plate and the second side plate respectively, and the second sealing portion is arranged between the rear side plate and the liquid cooling pipe.

[0012] In one embodiment, the first sealing portion and the second sealing portion are fixedly connected to form an integral structure.

[0013] In one embodiment, the first side plate and the second side plate have the same structure and are symmetrically arranged on opposite sides of the liquid-cooled base plate. The first side plate includes a horizontal plate and a vertical plate arranged at an angle. The horizontal plate is connected to the liquid-cooled base plate, and the vertical plate is connected to the rear side plate.

[0014] In one embodiment, one end of the vertical plate connected to the front side plate is provided with a first inclined surface, and the two ends of the front side plate connected to the first side plate and the second side plate are respectively provided with second inclined surfaces corresponding to the first inclined surface, and the first inclined surface abuts against the second inclined surface.

[0015] On the other hand, a battery pack is also provided, including a battery cell module and the above-mentioned detachable frame structure, the semi-enclosed frame and the rear side panel are arranged to form a placement cavity for placing the battery cell module, and the battery cell module is detachably connected to the liquid-cooled base plate of the frame body by adhesive.

[0016] In one embodiment, the battery cell module includes a plurality of battery cells, and the side surface with the largest area of ​​each battery cell is arranged toward the first side plate and the second side plate.

[0017] Beneficial effects of the utility model:

[0018] The utility model provides a detachable frame structure, which adopts a detachable frame body, wherein the strength and protection level of the overall frame structure can be effectively guaranteed by the structure of the semi-enclosed frame. Furthermore, the rear side panel is detachably connected to the semi-enclosed frame to form a detachable frame for placing the battery cell module, which facilitates the subsequent maintenance and replacement operations of a single battery cell, and does not require the replacement of the entire battery pack, thereby reducing maintenance costs. Furthermore, in order to ensure the overall protection and sealing level of the frame structure, a protective sealing assembly is also provided, wherein the protective sealing assembly includes a sealing strip and a fastener. By arranging the sealing strip between the semi-enclosed frame and the rear side panel, and respectively connecting the semi-enclosed frame, the rear side panel and the sealing strip by fasteners to achieve a fastened connection between the three, the fastening and sealing of the connection between the semi-enclosed frame and the rear side panel are guaranteed, thereby ensuring the protection and sealing level of the overall frame structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the exploded structure of a detachable frame structure in one embodiment;

[0020] Figure 2 yes Figure 1 A schematic diagram of the enlarged structure of the middle part A;

[0021] Figure 3 is a partially exploded structural diagram of a detachable frame structure in one embodiment;

[0022] Figure 4 is a schematic diagram of the overall structure of a detachable frame structure in one embodiment;

[0023] Figure 5 yes Figure 4 A schematic diagram of the enlarged structure of the middle part B;

[0024] Figure 6 is a schematic structural diagram of a sealing strip in one embodiment;

[0025] Figure 7 FIG. 1 is a schematic structural diagram of a battery pack in one embodiment.

[0026] In the picture:

[0027] 100. Frame body; 100a. Semi-enclosed frame; 110. Liquid-cooled bottom plate; 120. First side plate; 121. Horizontal plate; 122. Vertical plate; 1221. First inclined surface; 130. Second side plate; 140. Front side plate; 141. Second inclined surface; 150. Rear side plate; 151. Base; 152. Connecting plate; 160. Liquid-cooled tube; 170. Placement cavity; 210. Sealing strip; 211. First sealing portion; 212. Second sealing portion; 213. Right-angled edge; 220. Fastener; 300. Battery cell module; 310. Battery cell; 311. Expansion surface. DETAILED DESCRIPTION

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0029] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0031] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0032] On the one hand, if Figures 1 to 6As shown, a detachable frame structure of this embodiment includes a frame body 100 and a protective sealing assembly, wherein the frame body 100 includes the frame body (100) including a semi-enclosed frame (100a) and a rear side plate (150), wherein the semi-enclosed frame (100a) is provided with an opening along a first direction, and the rear side plate (150) is detachably sealed on the opening of the semi-enclosed frame (100a). Among them, the side panels include a first side panel 120, a second side panel 130, a front side panel 140 and a rear side panel 150 arranged around the liquid-cooled base panel 110. The liquid-cooled base panel 110, the first side panel 120, the second side panel 130, the front side panel 140 and the liquid cooling pipe 160 are fixedly connected to form a semi-enclosed frame 100a, and the rear side panel 150 is detachably connected to the semi-enclosed frame 100a. The protective sealing assembly includes a sealing strip 210 and a fastener 220. The sealing strip 210 is arranged between the semi-enclosed frame 100a and the rear side panel 150. The fastener 220 respectively connects the semi-enclosed frame 100a, the rear side panel 150 and the sealing strip 210.

[0033] In this embodiment, a detachable frame body 100 is used, and the semi-enclosed frame 100a can effectively ensure the strength and protection level of the overall frame structure. Furthermore, the rear side panel 150 is detachably connected to the semi-enclosed frame 100a, forming a detachable frame for accommodating the battery cell module 300. This facilitates subsequent maintenance and replacement of individual battery cells 310, eliminating the need to replace the entire battery pack and reducing maintenance costs. Furthermore, to ensure the overall protection and sealing level of the frame structure, a protective sealing assembly is provided, comprising a sealing strip 210 and a fastener 220. The sealing strip 210 is positioned between the semi-enclosed frame 100a and the rear side panel 150, and the fastener 220 connects the semi-enclosed frame 100a, the rear side panel 150, and the sealing strip 210 to achieve a secure connection between the three. This ensures the tightness and sealing of the connection between the semi-enclosed frame 100a and the rear side panel 150, thereby ensuring the protective sealing level of the overall frame structure.

[0034] In one embodiment, the frame body 100 includes a liquid-cooling base plate 110, a liquid-cooling tube 160, and side panels. The liquid-cooling base plate 110 is provided with a liquid-cooling channel connected to the liquid-cooling tube 160. Coolant is fed into the liquid-cooling channel of the liquid-cooling base plate 110 through the liquid-cooling tube 160 to cool the battery cell module 300. The side panels include a first side panel 120, a second side panel 130, a front side panel 140, and a rear side panel 150, which surround the liquid-cooling base plate 110. The liquid-cooling base plate 110, the first side panel 120, the second side panel 130, the front side panel 140, and the liquid-cooling tube 160 are fixedly connected to form a semi-enclosed frame 100a.

[0035] Specifically, the liquid-cooled bottom plate 110, the first side plate 120, the second side plate 130, the front side plate 140 and the liquid-cooling tube 160 are welded together to form a semi-enclosed frame 100a, thereby effectively ensuring the overall strength and protective sealing strength of the semi-enclosed frame 100a. Furthermore, the first side plate 120 and the second side plate 130 are made of an integrally formed extruded aluminum profile plate, thereby effectively ensuring the strength of the first side plate 120 and the second side plate 130, so as to improve the protective strength of the overall frame structure. In actual operation, the expansion surface 311 of the battery cell 310 (the side with the largest area of ​​the battery cell 310) is usually set in the direction of the first side plate 120 and the second side plate 130, respectively, so as to improve the strength of the first side plate 120 and the second side plate 130, so that the first side plate 120 and the second side plate 130 can resist the expansion force of the battery cell 310, which is conducive to ensuring the stability of the overall equipment.

[0036] In one embodiment, the first side panel 120 and the second side panel 130 are respectively arranged on opposite sides of the liquid-cooled base plate 110, and the front side panel 140 and the rear side panel 150 are respectively arranged on the other opposite sides of the liquid-cooled base plate 110. The liquid cooling pipe 160 is arranged on the side where the semi-enclosed frame 100a connects to the rear side panel 150. The liquid cooling pipe 160 is respectively connected to the liquid-cooled base plate 110, the first side panel 120, the second side panel 130, and the rear side panel 150. Specifically, the rear side panel 150 includes a connecting plate 152 and a base 151, which are arranged at an angle. The connecting plate 152 is respectively connected to the first side panel 120 and the second side panel 130, and the bottom of the base 151 is connected to the liquid cooling pipe 160. In actual application, the connecting plate 152 and the base 151 are arranged at a 90° angle, that is, the rear side panel 150 has an L-shaped design, thereby improving the strength of the rear side panel 150. In addition, the base 151 and the connecting plate 152 of the L-shaped rear side panel 150 are respectively connected to the semi-enclosed frame 100a, which is conducive to ensuring the connection strength between the rear side panel 150 and the semi-enclosed frame 100a, thereby ensuring the strength of the overall frame structure and improving the strength protection level of the overall frame structure.

[0037] In one embodiment, the sealing strip 210 includes a first sealing portion 211 and a second sealing portion 212. The first sealing portion 211 is disposed between the rear side panel 150 and the first and second side panels 120 and 130, respectively, while the second sealing portion 212 is disposed between the rear side panel 150 and the liquid cooling tube 160. Specifically, the sealing strip 210 is configured to correspond to the connection shape between the rear side panel 150 and the semi-enclosed frame 100a, ensuring a close fit between the sealing strip 210 and the rear side panel 150 and the semi-enclosed frame 100a, thereby ensuring a good sealing effect.

[0038] In this embodiment, the rear side panel 150 is L-shaped, and the two connecting surfaces of the rear side panel 150 and the semi-enclosed frame 100a are at 90°. The first sealing portion 211 and the second sealing portion 212 are set at a corresponding 90° angle, and the connection between the first sealing portion 211 and the second sealing portion 212 is set as a right-angled edge 213, so that the first sealing portion 211, the second sealing portion 212 and the right-angled edge 213 at the connection between the two can be completely fitted with the connecting surface of the rear side panel 150 and the semi-enclosed frame 100a to ensure the sealing and protection effect of the sealing strip 210.

[0039] In one embodiment, the first sealing portion 211 and the second sealing portion 212 are fixedly connected to form an integrated structure. In practice, the first sealing portion 211 and the second sealing portion 212 are integrally formed to form an integrated sealing strip 210, thereby effectively preventing leakage at the connection between the rear side panel 150 and the semi-enclosed frame 100a. Specifically, the integrated sealing strip 210 effectively ensures good continuity at the connection portions between the rear side panel 150 and the first side panel 120, the second side panel 130, and the liquid cooling tube 160, thereby achieving an effective sealing and protective effect.

[0040] In one embodiment, the first side panel 120 and the second side panel 130 have the same structure and are symmetrically arranged on opposite sides of the liquid-cooled base plate 110. The first side panel 120 includes a horizontal panel 121 and a vertical panel 122 arranged at an angle. The horizontal panel 121 is connected to the liquid-cooled base plate 110, and the vertical panel 122 is connected to the rear side panel 150. Specifically, the first side panel 120 and the second side panel 130 have the same structure and are each arranged in an L-shaped structure. The L-shaped structure of the first and second side panels 120, 130 further improves the strength of the first and second side panels 120, 130, thereby resisting the expansion force generated by the battery cells 310 during use and ensuring the overall stability of the battery pack.

[0041] In one embodiment, a first inclined surface 1221 is provided at one end of the vertical plate 122 connected to the front side plate 140, and a second inclined surface 141 corresponding to the first inclined surface 1221 is provided at both ends of the front side plate 140 connected to the first side plate 120 and the second side plate 130, respectively. The first inclined surface 1221 abuts against the second inclined surface 141. Specifically, the inclinations of the first inclined surface 1221 and the second inclined surface 141 are respectively 45 degrees, so that when the first side plate 120 and the second side plate 130 are respectively connected to the front side plate 140, the first inclined surface 1221 and the second inclined surface 141 are respectively aligned at right angles, and the connecting surfaces of the first side plate 120 and the second side plate 130 are respectively aligned with the front side plate 140, which facilitates welding and fixation, effectively reduces stress concentration in the weld, improves welding quality, and thus improves the protection level of the overall frame structure.

[0042] In one embodiment, the fastener 220 is configured as a glue-coated screw, which can effectively improve the fastening effect of the fastener 220. Specifically, a plurality of glue-coated screws are provided, and the distance between two adjacent glue-coated screws is less than 150 mm, so as to ensure the stability of the glue-coated screws in fixing the semi-enclosed frame 100a, the rear side panel 150 and the sealing strip 210, and to ensure the protection level of the frame body 100 formed by the connection between the rear side panel 150 and the semi-enclosed frame 100a, thereby ensuring the protection level of the overall frame structure. In actual operation, through the above-mentioned sealing and fastening design and operation of this embodiment, the protection level of the frame structure obtained can reach the protection level of IP67 or IP68, which meets the protection level required for battery pack production.

[0043] On the other hand, Figure 7 As shown, a battery pack is also provided, including a battery cell module 300 and the above-mentioned detachable frame structure, the semi-enclosed frame 100a and the rear side plate 150 are arranged to form a placement cavity 170 for placing the battery cell module 300, and the battery cell module 300 is detachably connected to the liquid cooling base plate 110 of the frame body 100 by adhesive.

[0044] In this embodiment, by adopting the above-mentioned detachable frame structure as the main frame of the battery pack, it is possible to facilitate the removal and replacement of a single battery cell 310 in the battery cell module 300 when a fault occurs, and the operation is simple and convenient. In addition, in this embodiment, the battery cell module 300 and the liquid-cooled base plate 110 are detachably connected by adhesive, that is, an adhesive with medium or medium-weak adhesive strength is used for connection, so that during normal use, the connection and fixation of the battery cell module 300 and the liquid-cooled base plate 110 can be ensured. When disassembling the battery cell module 300, the battery cell module 300 can be manually removed from the liquid-cooled base plate 110 without causing irreversible damage, so that a new battery cell module 300 can be replaced, and the maintenance operation of disassembling and replacing the battery cell module 300 is conveniently completed.

[0045] In one embodiment, the battery cell module 300 includes a plurality of battery cells 310, and the side with the largest area of ​​each battery cell 310 is arranged toward the first side plate 120 and the second side plate 130. In this embodiment, the side with the largest area of ​​the battery cell 310 is the expansion surface 311 of the battery cell 310, and the expansion surfaces 311 of the battery cell 310 are respectively arranged toward the first side plate 120 and the second side plate 130. This allows the expansion force of the battery cell 310 to be primarily borne by the first side plate 120 and the second side plate 130, that is, by the semi-enclosed frame 100a. This reduces the impact of the expansion of the battery cell 310 on the stable connection between the rear side plate 150 and the semi-enclosed frame 100a, and also avoids affecting the subsequent disassembly and maintenance of the rear side plate 150, thereby facilitating disassembly and maintenance and reducing the difficulty of reinstallation after disassembly and maintenance.

[0046] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A detachable frame structure, characterized in that: include: A frame body (100), the frame body (100) comprising a semi-enclosed frame (100a) and a rear side plate (150), the semi-enclosed frame (100a) being provided with an opening along a first direction, and the rear side plate (150) being detachably sealed on the opening of the semi-enclosed frame (100a); A protective sealing assembly, comprising a sealing strip (210) and a fastener (220), wherein the sealing strip (210) is arranged between the semi-enclosed frame (100a) and the rear side plate (150), and the fastener (220) respectively connects the semi-enclosed frame (100a), the rear side plate (150) and the sealing strip (210).

2. The detachable frame structure according to claim 1, characterized in that: The frame body (100) includes a liquid-cooling base plate (110), a liquid-cooling tube (160) and a side plate. The liquid-cooling base plate (110) is provided with a liquid-cooling channel connected to the liquid-cooling tube (160). The side plate includes a first side plate (120), a second side plate (130), a front side plate (140) and a rear side plate (150) arranged around the liquid-cooling base plate (110). The liquid-cooling base plate (110), the first side plate (120), the second side plate (130), the front side plate (140) and the liquid-cooling tube (160) are fixedly connected to form the semi-enclosed frame (100a).

3. The detachable frame structure according to claim 2, characterized in that: The first side plate (120) and the second side plate (130) are respectively arranged on two opposite sides of the liquid cooling bottom plate (110), and the front side plate (140) and the rear side plate (150) are respectively arranged on the other two opposite sides of the liquid cooling bottom plate (110); The liquid cooling pipe (160) is arranged on a side where the semi-enclosed frame (100a) is connected to the rear side plate (150), and the liquid cooling pipe (160) is respectively connected to the liquid cooling base plate (110), the first side plate (120), the second side plate (130) and the rear side plate (150).

4. The detachable frame structure according to claim 3, characterized in that: The rear side plate (150) includes a connecting plate (152) and a base (151) arranged at an angle, the connecting plate (152) being connected to the first side plate (120) and the second side plate (130) respectively, and the bottom of the base (151) is connected to the liquid cooling pipe (160).

5. The detachable frame structure according to claim 4, characterized in that: The sealing strip (210) includes a first sealing portion (211) and a second sealing portion (212), wherein the first sealing portion (211) is arranged between the rear side plate (150) and the first side plate (120) and the second side plate (130), respectively, and the second sealing portion (212) is arranged between the rear side plate (150) and the liquid cooling pipe (160).

6. The detachable frame structure according to claim 5, characterized in that: The first sealing portion (211) and the second sealing portion (212) are fixedly connected to form an integrated structure.

7. The detachable frame structure according to any one of claims 2 to 5, characterized in that: The first side plate (120) and the second side plate (130) have the same structure and are symmetrically arranged on opposite sides of the liquid-cooling base plate (110). The first side plate (120) includes a horizontal plate (121) and a vertical plate (122) arranged at an angle. The horizontal plate (121) is connected to the liquid-cooling base plate (110), and the vertical plate (122) is connected to the rear side plate (150).

8. The detachable frame structure according to claim 7, characterized in that: One end of the vertical plate (122) connected to the front side plate (140) is provided with a first inclined surface (1221), and both ends of the front side plate (140) connected to the first side plate (120) and the second side plate (130) are respectively provided with a second inclined surface (141) corresponding to the first inclined surface (1221), and the first inclined surface (1221) abuts against the second inclined surface (141).

9. A battery pack, characterized in that: The invention comprises a battery cell module (300) and a detachable frame structure according to any one of claims 1 to 8, wherein the semi-enclosed frame (100a) and the rear side plate (150) are arranged to form a placement cavity (170) for placing the battery cell module (300), and the battery cell module (300) is detachably connected to the liquid cooling base plate (110) of the frame body (100) by adhesive.

10. The battery pack according to claim 9, characterized in that: The battery cell module (300) comprises a plurality of battery cells (310), and the side surface with the largest area of ​​each battery cell (310) is arranged toward the first side plate (120) and the second side plate (130).

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