Battery case and battery

Abstract

The utility model relates to power battery technical field provides a kind of battery shell and battery.Battery shell includes: shell body, the shell body includes coaxial and interval arrangement's inner shell and outer shell, the accommodating space for accommodating battery pole group is formed in the inner shell, annular cavity is formed between the inner shell and the outer shell, multiple reinforcing ribs are arranged along the circumferential interval in the annular cavity, the inner end of the reinforcing rib is connected with the outer wall of the inner shell, the outer end of the reinforcing rib is connected with the inner wall of the outer shell, cooling liquid passage is formed between at least part adjacent reinforcing rib.The battery shell provided by the utility model enhances the anti-deformation ability of shell body when internal battery pole group expands, and simultaneously solves the problem that the existing technical means for solving battery overheating has complex structure and poor heat dissipation effect.

Description

Technical Field

[0001] This utility model relates to the field of power battery technology, and in particular to a battery casing and a battery. Background Technology

[0002] Battery overheating is a common challenge during fast charging and discharging, especially with the rapid development of new energy technologies, where applications such as electric vehicles and energy storage systems place increasingly higher demands on battery performance. During rapid charging and discharging, the larger current generates more internal resistance heat. If this heat cannot be dissipated in time, the battery temperature can easily rise, affecting its performance and safety.

[0003] To address battery overheating, existing technologies typically employ methods such as liquid cooling, air cooling, battery management systems (BMS), and thermally conductive materials. However, these existing solutions suffer from complex structures and poor heat dissipation, failing to effectively meet the heat dissipation requirements under high-power, high-frequency charging and discharging conditions. Utility Model Content

[0004] This utility model provides a battery casing and a battery to solve the problems of complex structure and poor heat dissipation in existing technologies for solving battery overheating.

[0005] This utility model provides a battery casing, comprising: a casing body, the casing body including an inner casing and an outer casing coaxially and spaced apart, the inner casing having a receiving space for accommodating a battery electrode assembly, an annular cavity being formed between the inner casing and the outer casing, a plurality of reinforcing ribs being spaced apart circumferentially within the annular cavity, the inner end of each reinforcing rib being connected to the outer wall of the inner casing, the outer end of each reinforcing rib being connected to the inner wall of the outer casing, and a coolant channel being formed between at least some adjacent reinforcing ribs.

[0006] According to the battery casing provided by this utility model, the annular cavity includes multiple side cavities, and each side cavity is provided with multiple reinforcing ribs at intervals, and the reinforcing ribs are inclinedly disposed in the side cavity.

[0007] According to the battery casing provided by this utility model, in each of the side cavities, the multiple reinforcing ribs have the same inclination direction.

[0008] According to the battery casing provided by this utility model, the inclination angles of the plurality of reinforcing ribs in each of the side cavities are the same.

[0009] According to the battery casing provided by this utility model, the inclination angle of the reinforcing rib is 15° to 75°.

[0010] According to the battery casing provided by this utility model, in each of the side cavities, at least some of the reinforcing ribs have different inclination directions.

[0011] According to the battery casing provided by this utility model, the thickness of the inner casing is 0.2 mm to 0.1 mm, and the thickness of the outer casing is 0.1 mm to 0.8 mm; and / or, along the thickness direction of the casing body, the distance between the inner casing and the outer casing is 0.3 mm to 1.5 mm.

[0012] According to the battery casing provided by this utility model, the thickness of the reinforcing rib is 0.5mm to 1.5mm; and / or, the spacing between adjacent reinforcing ribs is 5mm to 20mm.

[0013] According to the battery casing provided by this utility model, both ends of the casing body are provided with top covers, and the top covers are provided with coolant inlets, which are connected to the coolant channels.

[0014] In another aspect, this utility model provides a battery, comprising: a battery electrode assembly and a battery casing, wherein the battery electrode assembly is located within the accommodating space.

[0015] The battery casing provided by this utility model features multiple reinforcing ribs spaced circumferentially within an annular cavity formed between the inner and outer casings. These ribs enhance the structural strength of the battery casing and improve its resistance to deformation caused by the expansion of the internal battery electrode assembly. Furthermore, coolant channels are formed between at least some adjacent reinforcing ribs. When coolant is introduced, it effectively absorbs the heat generated by the battery electrode assembly during operation, preventing overheating and ensuring the battery maintains a stable temperature even at high power output. This extends the battery's lifespan and improves its efficiency. Additionally, coolant channels can be provided in multiple side chambers of the annular cavity, significantly improving heat dissipation. The structure is simple, and the heat dissipation effect is excellent.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the installation of the battery casing body and the battery electrode assembly in the battery casing provided in this embodiment of the utility model.

[0019] Figure 2 yes Figure 1 A magnified view of part A in the diagram.

[0020] Figure 3 This is a schematic diagram of the battery casing body provided in an embodiment of the present invention.

[0021] Figure 4 This is a schematic diagram of the battery provided in an embodiment of the present invention.

[0022] Figure label: 100. Battery casing; 110. Casing body; 111. Inner casing; 112. Outer casing; 113. Receiving space; 114. Annular cavity; 115. Reinforcing rib; 116. Coolant channel; 120. Top cover; 200. Battery electrode assembly. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this utility model 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 the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0026] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0027] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0028] The following is combined Figures 1 to 4 This invention describes the battery casing and battery provided by this utility model.

[0029] See Figures 1 to 3 As shown, the battery housing 100 provided in this embodiment of the present invention includes: a housing body 110, the housing body 110 including an inner housing 111 and an outer housing 112 that are coaxially arranged and spaced apart, the inner housing 111 having a receiving space 113 for accommodating the battery electrode assembly 200, an annular cavity 114 being formed between the inner housing 111 and the outer housing 112, a plurality of reinforcing ribs 115 being provided circumferentially spaced within the annular cavity 114, the inner end of the reinforcing ribs 115 being connected to the outer wall of the inner housing 111, the outer end of the reinforcing ribs 115 being connected to the inner wall of the outer housing 112, and a coolant channel 116 being formed between at least some adjacent reinforcing ribs 115.

[0030] The battery casing 100 provided by this utility model features multiple reinforcing ribs 115 spaced circumferentially within an annular cavity 114 formed between the inner casing 111 and the outer casing 112. These ribs enhance the structural strength of the battery casing 100 and improve its resistance to deformation during the expansion of the internal battery electrode assembly 200. Simultaneously, coolant channels 116 are formed between at least some adjacent reinforcing ribs 115. When coolant is introduced, it effectively absorbs the heat generated by the battery electrode assembly 200 during operation, preventing overheating and ensuring a stable temperature even at high power output, thus extending battery life and improving its efficiency. Furthermore, coolant channels 116 can be provided in multiple side cavities of the annular cavity 114, significantly improving heat dissipation. The structure is simple, and the heat dissipation effect is excellent.

[0031] Specifically, in this embodiment, a rectangular cavity is formed inside the housing body 110 to facilitate the arrangement of the battery electrode assembly 200. Correspondingly, the housing body 110 has two sets of sidewalls arranged opposite each other, one set of sidewalls being longer and the other set being relatively shorter, making the battery housing 100 as a whole blade-shaped. Multiple reinforcing ribs 115 are spaced apart in each of the four side cavities of the annular cavity 114.

[0032] It should be noted that the annular cavity 114 includes four side cavities, each of which is provided with multiple reinforcing ribs 115 at intervals. The reinforcing ribs 115 in the four side cavities of the annular cavity 114 can be arranged in a uniformly spaced or non-uniformly spaced manner, without any particular limitation. Specifically, uniformly spaced arrangement means that multiple reinforcing ribs 115 are arranged at the same angle, and the spacing between adjacent reinforcing ribs 115 is the same. Non-uniformly spaced arrangement means that at least some of the reinforcing ribs 115 are arranged at different angles, and / or, at least some of the adjacent reinforcing ribs 115 have different spacing.

[0033] In some embodiments, in the case of the non-uniform spacing, the distance between two adjacent reinforcing ribs 115 with coolant channels 116 is larger to supply sufficient coolant flow, while the distance between two adjacent reinforcing ribs 115 without coolant channels 116 is smaller to produce a stronger structural reinforcement effect.

[0034] It is understandable that the arrangement of multiple reinforcing ribs 115 in different side cavities of the annular cavity 114 can be adapted to actual needs. That is, the arrangement of multiple reinforcing ribs 115 in different side cavities of the annular cavity 114 can be the same or different.

[0035] The two ends of the reinforcing rib 115 can be perpendicularly connected to the inner shell 111 and the outer shell 112, or obliquely connected to the inner shell 111 and the outer shell 112, without any special limitation. For example, when the two ends of the reinforcing rib 115 can be perpendicularly connected to the inner shell 111 and the outer shell 112, it indicates that the included angle between the reinforcing rib 115 and the inner shell 111 and the outer shell 112 is 90°. When the reinforcing rib 115 is obliquely connected to the inner shell 111 and the outer shell 112, it indicates that the included angle between the reinforcing rib 115 and the inner shell 111 and the outer shell 112 is any angle other than 90°. For details, please refer to [link to relevant documentation]. Figure 2 and Figure 3 As shown.

[0036] The shell body 110 can be manufactured using processes such as extrusion.

[0037] See Figure 2 and Figure 3 As shown, according to some embodiments of the present invention, the reinforcing rib 115 is inclinedly disposed in the side cavity of the annular cavity 114.

[0038] By tilting the reinforcing ribs 115 into the side cavity of the annular cavity 114, the structural strength of the shell body 110 can be improved, thereby further enhancing the deformation resistance of the shell body 110.

[0039] Specifically, when the reinforcing rib 115 is inclined in the side cavity of the annular cavity 114, the expansion force generated by the battery electrode assembly 200 will be transmitted along the inclined direction of the reinforcing rib 115, generating two component forces perpendicular to the shell and parallel to the shell, so that the expansion force is more evenly distributed in the shell, avoiding local stress concentration, thereby improving the deformation resistance of the shell body 110.

[0040] See Figure 2 and Figure 3 As shown, according to some embodiments of the present invention, in each side cavity of the annular cavity 114, the inclination direction of the plurality of reinforcing ribs 115 is the same.

[0041] By setting the inclination direction of multiple reinforcing ribs 115 in each side cavity of the annular cavity 114 to be the same, coordinated force transmission and more uniform stress distribution can be achieved. When the inclination direction of multiple reinforcing ribs 115 is consistent, they act together on the corresponding side of the shell body 110, ensuring that the distribution of expansion force on each side of the shell body 110 is more balanced, thereby further improving the stability and durability of the shell body 110.

[0042] See Figure 2 and Figure 3 As shown, according to some embodiments of the present invention, in each side cavity of the annular cavity 114, the inclination angle of the plurality of reinforcing ribs 115 is ( Figure 3 (As shown in ∠α) is the same.

[0043] By setting the inclination angle of multiple reinforcing ribs 115 in each side cavity of the annular cavity 114 to be the same, the overall stability and deformation resistance of the housing body 110 can be further improved. When the inclination angle of multiple reinforcing ribs 115 is the same, it can be ensured that the reinforcing ribs 115 share the expansion force generated by the battery electrode assembly 200 in a consistent manner on the same side of the housing body 110, thereby making the force transmission more uniform and coordinated.

[0044] See Figure 2 and Figure 3 As shown, according to some embodiments of the present invention, the inclination angle of the reinforcing rib 115 is 15° to 75°.

[0045] By setting the inclination angle of the reinforcing rib 115 to 15° to 75°, the stress distribution of the housing body 110 and the deformation resistance can be optimized while ensuring the structural strength of the housing body 110. This allows the reinforcing rib 115 to more effectively disperse the expansion force of the battery electrode assembly 200, while avoiding stress concentration or insufficient support caused by an overly steep or overly gentle design of the reinforcing rib 115.

[0046] As an example, the inclination angle of the reinforcing rib 115 can be 15°, 30°, 40°, 45°, 60° or 75°, etc.

[0047] According to some embodiments of the present invention, among the multiple reinforcing ribs 115 in each side cavity of the annular cavity 114, at least some of the reinforcing ribs 115 have different inclination directions.

[0048] By setting the inclination direction of at least some of the multiple reinforcing ribs 115 in each side cavity of the shell body 110 to be different, the deformation resistance and structural stability of the shell can also be optimized.

[0049] Specifically, the reinforcing ribs 115 with different inclination directions can disperse and transfer stress in different directions, avoiding stress concentration in a single direction and thus reducing the risk of local stress concentration. For example, the multiple reinforcing ribs 115 on each side of the annular cavity 114 can be divided into two groups, one group facing left ( Figure 3 One group tilts to the right (as shown in the diagram), while the other group tilts to the right.

[0050] According to some embodiments of the present invention, the thickness of the inner shell 111 is 0.2 mm to 1 mm, and the thickness of the outer shell 112 is 0.1 mm to 0.8 mm.

[0051] By setting the thickness of the inner shell 111 to 0.2 mm to 1 mm and the thickness of the outer shell 112 to 0.1 mm to 0.8 mm, the structural strength of the shell body 110 can be guaranteed while achieving a lightweight design. Furthermore, appropriate thicknesses of the inner shell 111 and outer shell 112 can also ensure the flatness of the shell body 110.

[0052] Specifically, the thickness range of the inner and outer shells 112 ensures that the shells maintain good resistance to deformation when subjected to the expansion force of the battery electrode assembly 200, while preventing the additional cost caused by excessive thickness. This ensures the structural strength and safety of the shells, achieving a balance between weight, cost, and performance. Appropriate thicknesses of the inner shell 111 and outer shell 112 also ensure the flatness of the shell body 110, effectively preventing deformation of the shell body 110 under the expansion force of the battery electrode assembly 200.

[0053] As an example, the thickness of the inner shell 111 can be 0.2mm, 0.5mm, 0.8mm or 1mm, etc., and the thickness of the outer shell 112 can be 0.1mm, 0.5mm or 0.8mm, etc.

[0054] According to some embodiments of the present invention, the distance between the inner shell 111 and the outer shell 112 along the thickness direction of the shell body 110 is 0.3 mm to 1.5 mm.

[0055] By setting the distance between the inner shell 111 and the outer shell 112 to 0.3mm to 1.5mm, sufficient space can be provided for the arrangement of the reinforcing ribs 115, ensuring that the shell body 110 has a certain structural strength after molding. At the same time, sufficient space can be provided for the design of the coolant channel 116, which can hold a sufficient amount of coolant to dissipate heat from the battery electrode assembly 200.

[0056] As an example, the distance between the inner shell 111 and the outer shell 112 can be 0.3mm, 0.5mm, 0.8mm, 1mm or 1.5mm, etc.

[0057] According to some embodiments of the present invention, the thickness of the reinforcing rib 115 is 0.5 mm to 1.5 mm.

[0058] By setting the thickness of the reinforcing rib 115 to 0.5mm to 1.5mm, the structural strength of the housing body 110 can be effectively improved, thereby giving it stronger resistance to deformation under the expansion force of the battery electrode assembly 200. While ensuring the structural strength of the housing body 110, it is also possible to avoid excessive weight increase of the housing body 110 due to excessive thickness of the reinforcing rib 115, thus achieving an optimized balance between strength and weight.

[0059] As an example, the thickness of the reinforcing rib 115 can be 0.5mm, 0.8mm, 1mm or 1.5mm, etc.

[0060] According to some embodiments of the present invention, the spacing between adjacent reinforcing ribs 115 is 5mm to 20mm.

[0061] By setting the spacing between adjacent reinforcing ribs 115 to 5mm to 20mm, the coolant channel 116 can have sufficient volume to accommodate coolant while ensuring the structural strength of the housing body 110. For example, the spacing between two adjacent reinforcing ribs 115 with coolant channels 116 is larger to supply sufficient coolant flow, while the spacing between two adjacent reinforcing ribs 115 without coolant channels 116 is smaller to produce a stronger structural reinforcement effect.

[0062] As an example, the spacing between adjacent reinforcing ribs 115 can be 5mm, 8mm, 10mm, 15mm or 20mm, etc.

[0063] See Figure 1 As shown, according to some embodiments of the present invention, both ends of the housing body 110 are provided with top covers 120, and the top covers 120 are provided with coolant interfaces (not shown in the figure), which are connected to the coolant channels 116.

[0064] By providing top covers 120 at both ends of the housing body 110 and providing coolant interfaces on the top covers 120 that communicate with the coolant passage 116, it is convenient to inject and drain coolant, and also simplifies the maintenance and management of the coolant system, ensuring that the replacement or replenishment of coolant is more convenient.

[0065] In practice, the coolant inlets of the two top covers 120 can be connected to the coolant circulation system. Through pipes or connectors, the coolant inlets can be connected to system components such as the coolant pump and coolant reservoir, forming a complete coolant circulation loop. The coolant flows into the coolant channel 116 through the inlets, absorbing and carrying away the heat generated by the charging and discharging of the battery electrode assembly 200. After being dissipated by other components of the cooling system (such as radiators and heat exchangers), the coolant flows back into the system for recirculation.

[0066] The battery provided by this utility model is described below. The battery described below can be referred to in correspondence with the battery casing 100 described above.

[0067] See Figure 4 As shown, the battery provided in this embodiment of the present invention includes: a battery electrode assembly 200 and a battery casing 100 as described in any of the above embodiments, wherein the battery electrode assembly 200 is located within the accommodating space 113.

[0068] The battery provided by this utility model, by adopting the aforementioned battery casing 100, enhances the deformation resistance of the casing body 110 to the expansion of the internal battery electrode assembly 200, and at the same time solves the problems of complex structure and poor heat dissipation effect of existing technologies for solving battery overheating.

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

Claims

1. A battery casing, characterized in that, include: The housing body includes an inner housing and an outer housing that are coaxially spaced apart. The inner housing has a receiving space for accommodating the battery electrode assembly. An annular cavity is formed between the inner housing and the outer housing. A plurality of reinforcing ribs are provided circumferentially spaced within the annular cavity. The inner end of each reinforcing rib is connected to the outer wall of the inner housing, and the outer end of each reinforcing rib is connected to the inner wall of the outer housing. Coolant channels are formed between at least some of the adjacent reinforcing ribs.

2. The battery casing according to claim 1, characterized in that, The annular cavity includes multiple side cavities, and each side cavity is provided with multiple reinforcing ribs at intervals, with the reinforcing ribs being inclined within the side cavity.

3. The battery casing according to claim 2, characterized in that, Within each of the side cavities, the multiple reinforcing ribs are tilted in the same direction.

4. The battery casing according to claim 3, characterized in that, Within each of the side cavities, the multiple reinforcing ribs have the same tilt angle.

5. The battery casing according to claim 4, characterized in that, The inclination angle of the reinforcing rib is between 15° and 75°.

6. The battery casing according to claim 2, characterized in that, Within each of the side cavities, at least some of the reinforcing ribs have different inclination directions.

7. The battery casing according to any one of claims 1 to 6, characterized in that, The thickness of the inner shell is 0.2 mm to 1 mm, and the thickness of the outer shell is 0.1 mm to 0.8 mm. And / or, along the thickness direction of the housing body, the distance between the inner housing and the outer housing is 0.3 mm to 1.5 mm.

8. The battery casing according to any one of claims 1 to 6, characterized in that, The thickness of the reinforcing rib is 0.5 mm to 1.5 mm; And / or, the spacing between adjacent reinforcing ribs is 5 mm to 20 mm.

9. The battery casing according to any one of claims 1 to 6, characterized in that, Both ends of the housing body are provided with top covers, and the top covers are provided with coolant inlets, which are connected to the coolant channels.

10. A battery, characterized in that, include: Battery electrode assembly; The battery casing as described in any one of claims 1 to 9, wherein the battery electrode assembly is located within the receiving space.

Images