Battery case and battery pack

Abstract

The utility model provides a battery case and battery package belong to new energy technology field, the utility model provides a kind of battery case not only including heat dissipation bottom plate still including two heat dissipation end plate, two heat dissipation side plate and inner partition. The application is provided with multiple transverse hollowing-out grooves on heat dissipation end plate and utilizes inner partition to divide the storage space of single side upper portion open into inner storehouse and outer storehouse, inner storehouse is used to place battery cell module, DCDC module is placed in outer storehouse. The setting of multiple transverse hollowing-out grooves facilitates the rapid discharge of the heat of battery cell module, and due to the setting of inner storehouse and outer storehouse, the battery cell module, wire harness and DCDC module can be effectively isolated, thereby facilitating the discharge of the heat of battery cell module and DCDC module, avoiding the damage of battery cell module and DCDC module caused by heat accumulation in battery case, realizing the technical effects of enhancing heat dissipation effect and improving the service life of battery system.

Description

Technical Field

[0001] This utility model belongs to the field of new energy battery technology, specifically relating to a battery casing and battery pack. Background Technology

[0002] With the continuous development of the new energy industry, lithium batteries are increasingly being used as energy storage units in various industries. At the same time, in order to extend the driving time of lithium battery systems, battery pack designers try to arrange as many cells as possible in a limited space. As the number of cells increases, the heat generated inside the battery pack also increases. As the temperature inside the pack rises, it poses challenges to the cycle life and operational safety of the battery.

[0003] Existing patent application number 2023207149007 discloses a module mounting bracket and a battery cell module, including a heat dissipation base, a heat dissipation partition, multiple heat dissipation fins, and a cover. The heat dissipation base has multiple wavy media flow channels for liquid cooling medium circulation. The heat dissipation partition is fixed to the upper surface of the heat dissipation base and located between two adjacent battery cells. Multiple heat dissipation fins are spaced apart on the lower surface of the heat dissipation base. The heat dissipation fins are wavy. The cover and the heat dissipation base together form a storage space for placing the battery cells. This application only sets up a separate storage space for placing the battery cells and does not effectively isolate the DC-DC module from the battery cell module. Therefore, in actual use, the battery cell module continuously dissipates heat during charging and discharging, affecting the lifespan of the components inside the DC-DC module, ultimately leading to a reduced lifespan of the DC-DC module and creating safety hazards. Utility Model Content

[0004] This utility model provides a battery casing and a battery pack, which aims to solve the technical problem in the prior art that the DC-DC module and the cell module are not effectively isolated, which affects the service life of the components in the DC-DC module.

[0005] In a first aspect, this utility model embodiment provides a battery casing that includes not only a heat dissipation base plate with multiple heat dissipation fins on its lower surface, but also two heat dissipation end plates, two heat dissipation side plates, and an inner partition plate. The two heat dissipation end plates are fixed to the heat dissipation base plate and are arranged vertically in parallel with a gap along the length of the heat dissipation base plate; the heat dissipation end plates are provided with multiple transverse hollow slots, which are spaced apart along the vertical height direction of the heat dissipation end plates.

[0006] Two heat dissipation side plates are fixed to the heat dissipation base plate, and the two heat dissipation side plates are arranged vertically in parallel along the width direction of the heat dissipation base plate; the heat dissipation base plate, the two heat dissipation end plates, and the two heat dissipation side plates together form a storage space with an open upper side on one side; and

[0007] An inner partition is vertically spaced within the storage space, which divides the storage space into an inner compartment and an outer compartment.

[0008] In conjunction with the first aspect, in one possible implementation, the outer side wall of the heat dissipation end plate is provided with a plurality of vertical heat dissipation fins, and the plurality of vertical heat dissipation fins are spaced apart along the width direction of the heat dissipation end plate.

[0009] In conjunction with the first aspect, in one possible implementation, the heat dissipation end plate is connected to the heat dissipation base plate via a detachable connection structure, and the heat dissipation side plate is connected to the heat dissipation base plate via a detachable connection structure.

[0010] In conjunction with the first aspect, in one possible implementation, the heat dissipation side plate is provided with two bent portions, which are arranged in parallel on both sides of the length direction of the heat dissipation side plate, and the bent portions are arranged perpendicular to the heat dissipation side plate.

[0011] In conjunction with the first aspect, in one possible implementation, the heat dissipation end plate is provided with two mounting slots, which are symmetrically arranged on both sides of the width direction of the heat dissipation end plate. The mounting slots are formed on the inner sidewall of the heat dissipation end plate and are used to accommodate the bent portion.

[0012] In conjunction with the first aspect, in one possible implementation, the heat dissipation end plate and the heat dissipation side plate are connected by a bolt structure.

[0013] In conjunction with the first aspect, in one possible implementation, the mounting groove is provided with a plurality of bolt through holes, the bent portion is provided with a plurality of bolt holes, and the plurality of bolt holes are spaced apart along the vertical direction of the heat dissipation end plate; the plurality of bolt through holes and the plurality of bolt holes are provided in a one-to-one correspondence.

[0014] In conjunction with the first aspect, in one possible implementation, the heat dissipation base plate includes a base plate and two support beams. The base plate has mounting holes for mounting connector females; the two support beams are hollow structures, and are arranged parallel to each other on the base plate along its width, and are fixedly connected to the base plate; the upper plane of the support beams is flush with the upper plane of the base plate.

[0015] In conjunction with the first aspect, in one possible implementation, the detachable connection structure is a snap-fit ​​connection structure, a bolt connection structure, or a pin connection structure.

[0016] Secondly, this utility model embodiment also provides a battery pack, which includes the battery casing described in any of the above embodiments.

[0017] This utility model provides a battery casing that includes not only a heat dissipation base plate but also two heat dissipation end plates, two heat dissipation side plates, and an inner partition. Compared with the prior art, this application divides the single-sided open storage space into an inner compartment and an outer compartment by providing multiple horizontally hollowed-out slots on the heat dissipation end plates and using the inner partition. The inner compartment is used to place the battery cell module, and the DC-DC module is placed in the outer compartment. The multiple horizontally hollowed-out slots facilitate the rapid dissipation of heat from the battery cell module. Furthermore, the inner and outer compartments effectively isolate the battery cell module, wiring harness, and DC-DC module, thereby facilitating the dissipation of heat from the battery cell module and DC-DC module, preventing heat accumulation inside the battery casing that could damage the battery cell module and DC-DC module, and achieving the technical effects of enhanced heat dissipation and improved battery system lifespan. Attached Figure Description

[0018] Figure 1 Schematic diagram of the heat dissipation base plate provided in the embodiment of this utility model Figure 1 ;

[0019] Figure 2 Schematic diagram of the heat dissipation base plate provided in the embodiment of this utility model Figure 2 ;

[0020] Figure 3 Schematic diagram of the heat dissipation end plate provided in the embodiment of this utility model Figure 1 ;

[0021] Figure 4 Schematic diagram of the heat dissipation end plate provided in the embodiment of this utility model Figure 2 ;

[0022] Figure 5 for Figure 4 A magnified view of a portion of region A in the middle;

[0023] Figure 6 Schematic diagram of the heat dissipation side plate provided in the embodiment of this utility model Figure 1 ;

[0024] Figure 7 A schematic diagram of the overall structure of the battery casing (excluding the top cover) provided in an embodiment of this utility model;

[0025] Figure 8 A top view of the battery casing (excluding the top cover) provided in an embodiment of this utility model;

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Heat dissipation base plate; 12. Heat dissipation fins; 10. Base plate; 11. Support beam; 101. Mounting holes;

[0028] 2. Heat dissipation end plate; 21. Horizontal hollow groove; 22. Vertical heat dissipation fins; 23. Mounting groove; 231. Bolt through hole; 232. Handle through hole;

[0029] 3. Heat dissipation side panel; 31. Bending section;

[0030] 4. Inner partition; 41. Inner warehouse; 42. Outer warehouse. Detailed Implementation

[0031] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0032] It should be further noted that the accompanying drawings and embodiments of this application mainly describe the concept of this application. Based on this concept, some specific forms and arrangements of connection relationships, positional relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be fully described. However, under the premise that those skilled in the art understand the concept of this application, they can implement the above-mentioned specific forms and arrangements in a well-known manner.

[0033] When a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0034] The terms “length,” “width,” “up,” “down,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0035] 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. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, and "several" means one or more, unless otherwise explicitly specified.

[0036] Please refer to the following: Figures 1 to 8 The present application will now describe a battery casing and battery pack.

[0037] In a first aspect, embodiments of this application provide a battery casing that includes not only a heat dissipation base plate 1 with multiple heat dissipation fins 12 on its lower surface, but also two heat dissipation end plates 2, two heat dissipation side plates 3, and an inner partition 4. The two heat dissipation end plates 2 are fixed to the heat dissipation base plate 1 and are arranged vertically in parallel with spacing along the length of the heat dissipation base plate 1; the heat dissipation end plates 2 are provided with multiple horizontal perforated slots 21, which are spaced apart along the vertical height of the heat dissipation end plates 2; the two heat dissipation side plates 3 are fixed to the heat dissipation base plate 1 and are arranged vertically in parallel with spacing along the width of the heat dissipation base plate 1; the heat dissipation base plate 1, the two heat dissipation end plates 2, and the two heat dissipation side plates 3 together form a storage space with an open upper portion on one side; and the inner partition 4 is vertically spaced within the storage space, dividing the storage space into an inner compartment 41 and an outer compartment 42.

[0038] The inner compartment 41 is used to place the battery cell module, and the outer compartment 42 is used to place the DC-DC module.

[0039] This application provides a battery casing that includes not only a heat dissipation base plate 1 but also two heat dissipation end plates 2, two heat dissipation side plates 3, and an inner partition 4. Compared with the prior art, this application provides multiple horizontally hollowed-out slots 21 on the heat dissipation end plates 2 and uses the inner partition 4 to divide the single-sided upper open storage space into an inner compartment 41 and an outer compartment 42. The inner compartment 41 is used to place the battery cell module, and the DC-DC module is placed in the outer compartment 42. The multiple horizontally hollowed-out slots 21 facilitate the rapid dissipation of heat from the battery cell module. Furthermore, the inner compartment 41 and the outer compartment 42 effectively isolate the battery cell module, wiring harness, and DC-DC module, thereby facilitating the dissipation of heat from the battery cell module and the DC-DC module, preventing heat accumulation inside the battery casing from damaging the battery cell module and the DC-DC module, and achieving the technical effect of enhancing heat dissipation and improving the service life of the battery system.

[0040] Specifically, the heat dissipation side plate 3 is made of 6063 aluminum, and two heat dissipation side plates 3 are set on both sides of the battery cell module. During actual installation, a phase change thermal conductive patch is set between the heat dissipation side plate 3 and the battery cell module. The heat generated by the battery cell during charging and discharging is conducted to the aluminum plate through the phase change thermal conductive patch and dissipated.

[0041] Please see Figure 7 Furthermore, the inner partition 4 has a U-shaped frame structure, which facilitates the connection of the DC-DC module's wiring harness to the battery cell module.

[0042] Specifically, the DC-DC housing is connected to the U-shaped frame by bolts, thereby sealing the components inside the DC-DC module and the wiring harness of the DC-DC module.

[0043] Based on the above embodiments, both the heat dissipation base plate 1 and the heat dissipation end plate 2 are made of aluminum. Aluminum has a thermal conductivity of 237 W / (m·K), and its heat dissipation performance is second only to copper and silver. Simultaneously, the heat dissipation fins 12 arranged on the heat dissipation base plate 1 can increase the heat dissipation area, enabling rapid conduction of heat generated by the battery cells, ensuring the safe and stable operation of the battery cells and circuitry. Using aluminum also significantly reduces the weight of the battery pack, allowing the battery cell module to accommodate more cells within a limited weight, which is beneficial for improving the energy density of the battery cell module.

[0044] The aluminum surface treatment method involved in this application is anodizing. This surface treatment method has the following effects: the surface is delicate, smooth, and beautiful, which is highly acceptable to users. It can effectively enhance the product's tone and sense of luxury, form a unique brand image, and attract and retain the target user group.

[0045] Furthermore, this application also includes an inner end plate, which is vertically spaced on the side away from the inner partition 4. The inner partition 4 and the heat dissipation end plate 2 are spaced apart, and the inner partition 4 and the inner end plate form a receiving cavity for accommodating the battery cell module.

[0046] The inner end plate divides the inner compartment 41 into a receiving cavity for accommodating the battery cell module and a heat dissipation cavity for convenient heat dissipation. This effectively protects the battery cell module, improves its waterproof performance, and the heat dissipation cavity also improves the heat exchange efficiency with the air.

[0047] The housing and top cover of this invention are made of aluminum profile, which has high processing precision, a delicate and smooth surface, better overall sealing performance, and a protection level of IP67. This can effectively protect the battery cells and live parts, and improve the service life and safety performance of the product.

[0048] Specifically, there is a certain cavity gap between the battery cell module and the heat dissipation side plate 3.

[0049] In conjunction with the first aspect, multiple vertical heat dissipation fins 22 are provided on the outer vertical walls of the two heat dissipation end plates 2, and the multiple vertical heat dissipation fins 22 are spaced apart along the width direction of the heat dissipation end plates 2.

[0050] Vertical heat dissipation fins 22 and horizontal hollowed-out grooves 21 form a grid structure on the heat dissipation end plate 2, and the heat generated by the battery cell module is dissipated through the grid structure.

[0051] In conjunction with the first aspect, and referring to... Figure 6 The heat dissipation side plate 3 is provided with two bending parts 31, which are arranged in parallel on both sides of the length direction of the heat dissipation side plate 3, and the bending parts 31 are arranged perpendicular to the heat dissipation side plate 3.

[0052] In conjunction with the first aspect, please refer to Figure 4 and Figure 5The heat dissipation end plate 2 is provided with two mounting slots 23. The two mounting slots 23 are symmetrically arranged on both sides of the width direction of the heat dissipation end plate 2. The mounting slots 23 are opened on the inner side wall of the heat dissipation end plate 2 and are used to accommodate the bent part 31.

[0053] In conjunction with the first aspect, the heat dissipation end plate 2 and the heat dissipation side plate 3 are connected by a bolt structure.

[0054] In conjunction with the first aspect, the mounting groove 23 is provided with multiple bolt through holes 231, and the bent part 31 is provided with multiple bolt holes, with the multiple bolt through holes 231 and the multiple bolt holes being set one-to-one.

[0055] In conjunction with the first aspect, please refer to Figure 1 and Figure 2 The heat dissipation base plate 1 includes a base plate 10, two support beams 11, and multiple heat dissipation fins 12. The base plate 10 has mounting holes 13; the two support beams 11 are hollow structures and are arranged parallel to each other on the base plate 10 along the width of the base plate 10, and are fixedly connected to the base plate 10; the upper surface of the support beams 11 is flush with the upper surface of the base plate 10; the multiple heat dissipation fins 12 are fixed on the lower surface of the base plate 10, and are spaced apart along the width of the base plate 10, with the length of the heat dissipation fins 12 parallel to the length direction of the base plate 10.

[0056] In conjunction with the first aspect, a handle through hole 232 is provided on the heat dissipation end plate 2, and the handle through hole 232 is an oblong hole.

[0057] In conjunction with the first aspect, the heat dissipation end plate 2 and the heat dissipation base plate 1 are connected by a detachable connection structure, and the heat dissipation side plate 3 and the heat dissipation base plate 1 are connected by a detachable connection structure.

[0058] Specifically, the detachable connection structure can be a snap-fit ​​connection, a bolt connection, or a pin connection. Using snap-fit, bolt, or pin connections facilitates the disassembly and installation of the connected components compared to other fixing methods such as welding.

[0059] Secondly, embodiments of this application also provide a battery pack, which includes any of the battery casings described in the above embodiments.

[0060] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A battery casing, comprising a heat dissipation base plate (1) and a top cover, wherein a plurality of heat dissipation fins (12) are provided on the lower surface of the heat dissipation base plate (1); characterized in that, Also includes: Two heat dissipation end plates (2) are fixed on the heat dissipation base plate (1). The two heat dissipation end plates (2) are arranged vertically in parallel with intervals along the length direction of the heat dissipation base plate (1). The heat dissipation end plates (2) are provided with multiple horizontal hollow slots (21). The multiple horizontal hollow slots (21) are arranged at intervals along the vertical height direction of the heat dissipation end plates (2). Two heat dissipation side plates (3) are fixed on the heat dissipation base plate (1), and the two heat dissipation side plates (3) are arranged vertically in parallel along the width direction of the heat dissipation base plate (1); the heat dissipation base plate (1), the two heat dissipation end plates (2), and the two heat dissipation side plates (3) together form a storage space with an open upper side on one side; and An inner partition (4) is vertically spaced within the storage space. The inner partition (4) is used to divide the storage space into an inner compartment (41) and an outer compartment (42). The inner compartment (41) is used to place the battery cell module, and the outer compartment (42) is used to place the DC-DC module.

2. The battery casing as described in claim 1, characterized in that, The outer wall of the heat dissipation end plate (2) is provided with a plurality of vertical heat dissipation fins (22), and the plurality of vertical heat dissipation fins (22) are spaced apart along the width direction of the heat dissipation end plate (2).

3. The battery casing as described in claim 2, characterized in that, The heat dissipation end plate (2) is connected to the heat dissipation base plate (1) through a detachable connection structure, and the heat dissipation side plate (3) is connected to the heat dissipation base plate (1) through a detachable connection structure.

4. The battery casing as described in claim 3, characterized in that, The heat dissipation side plate (3) is provided with two bending portions (31), which are arranged in parallel on both sides of the length direction of the heat dissipation side plate (3), and the bending portions (31) are arranged perpendicular to the heat dissipation side plate (3).

5. The battery casing as described in claim 4, characterized in that, The heat dissipation end plate (2) is provided with two mounting slots (23), which are symmetrically arranged on both sides of the width direction of the heat dissipation end plate (2). The mounting slots (23) are opened on the inner side wall of the heat dissipation end plate (2) and are used to accommodate the bent part (31).

6. The battery casing as described in claim 5, characterized in that, The heat dissipation end plate (2) and the heat dissipation side plate (3) are connected by a bolt structure.

7. The battery casing as described in claim 6, characterized in that, The mounting groove (23) is provided with a plurality of bolt through holes (231), and the bent part (31) is provided with a plurality of bolt holes. The plurality of bolt holes are spaced apart along the vertical direction of the heat dissipation end plate (2); the plurality of bolt through holes (231) and the plurality of bolt holes are provided in a one-to-one correspondence.

8. The battery casing as described in claim 7, characterized in that, The heat dissipation base plate (1) includes: The substrate (10) has mounting holes (13) for mounting a connector female head; Two support beams (11) are hollow structures. The two support beams (11) are arranged in parallel on the substrate (10) along the width of the substrate (10). The support beams (11) are fixedly connected to the substrate (10). The upper plane of the support beams (11) is flush with the upper plane of the substrate (10).

9. The battery casing as described in claim 3, characterized in that, The detachable connection structure can be a snap-fit ​​connection structure, a bolt connection structure, or a pin connection structure.

10. A battery pack, characterized in that, Includes a battery casing having any one of claims 1-9.

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