Battery box

Abstract

This utility model relates to the field of lithium battery technology, and provides a battery housing including a support base and side beams. The side beams are disposed around the edge of the support base to form an accommodating space for installing battery cell modules within the support base. Both the support base and the side beams have internal cooling channels for coolant flow, and the support base and / or the side beams are provided with inlets and outlets, both of which communicate with the cooling channels to form a circulating flow path for coolant. This utility model, by integrating cooling channels into both the side beams and the support base, reduces thermal management costs and effectively prevents thermal runaway. Furthermore, the circulation of coolant in this circulating flow path significantly improves the safety protection level of the battery pack, enhances the overall vehicle safety factor, and greatly reduces the probability of spontaneous combustion of the battery pack due to external force damage in the event of a car accident, thus protecting the personal safety of passengers.

Description

Technical Field

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

[0002] The power battery is a core component of electric vehicles, and the safety of the power battery system directly determines the safety of the entire vehicle. Ensuring the safety of the battery pack under extreme conditions is a key aspect of sustainable development for automakers. Ensuring the safety of the battery pack under extreme vehicle collision conditions requires even stricter standards.

[0003] In related technologies, when a vehicle is subjected to an extreme collision, the battery pack is prone to thermal runaway. How to prevent the battery pack from thermal runaway under extreme collisions is one of the important problems that need to be solved at present. Utility Model Content

[0004] This invention provides a battery housing to address the shortcomings of existing technologies that are prone to thermal runaway after a collision.

[0005] This utility model provides a battery box, characterized in that it includes: a support base and a side beam; the side beam is disposed around the edge of the support base to form an accommodating space for installing battery cell modules within the support base; wherein, both the support base and the side beam are internally constructed with cooling channels for coolant flow, and the support base and / or the side beam are provided with a coolant inlet and a coolant outlet, both of which are connected to the cooling channels to form a circulating flow path for coolant flow.

[0006] According to the battery box provided by this utility model, the battery box further includes an orthogonal connecting plate assembly, the orthogonal connecting plate assembly includes at least one first partition plate arranged along a first axis direction and at least one second partition plate arranged along a second axis direction; and both ends of the second partition plate are connected to the side beam, and the intersection of the second partition plate and the first partition plate is rigidly connected to divide the accommodating space into multiple accommodating units.

[0007] According to the battery box provided by this utility model, the first partition plate is provided with a connecting channel, which is connected to the cooling channel in the support base.

[0008] According to the battery housing provided by this utility model, a connecting pipe is provided between the support base and the first partition plate, and the connecting pipe is used for coolant flow.

[0009] According to the battery box provided by this utility model, the first partition plate is provided at both ends and in the middle of the first partition plate, and the first partition plate and the second partition plate are perpendicular to each other.

[0010] According to the battery box provided by this utility model, the support base includes a side support plate, a main support plate and a protective connecting plate. The side support plate is disposed on both sides of the main support plate, and the protective connecting plate is disposed between the side support plate and the main support plate; wherein, the side beam is integrally formed with the side support plate.

[0011] According to the battery box provided by this utility model, the main support plate includes a modular splicing plate, and the modular splicing plate and the protective connecting plate are alternately connected in the horizontal direction.

[0012] According to the battery box provided by this utility model, the side support plate and the module splicing plate are both provided with a mating connection part on the side where they are connected to the protective connecting plate, and the protective connecting plate is connected to the mating connection part.

[0013] According to the battery box provided by this utility model, the mating connection parts on both sides of the protective connecting plate are provided with relatively inclined slopes, the protective connecting plate is located below the slopes, and the upper surface of the protective connecting plate is engaged with the lower edge of the slopes to jointly enclose and form a receiving groove.

[0014] According to the battery box provided by this utility model, the cooling channels are formed in both the module splicing plate and the side support plate, and a connecting pipe is provided between adjacent module splicing plates. A connecting pipe is also provided between the side support plate and the module splicing plate. The connecting pipe is used to connect the cooling channels.

[0015] The battery pack provided by this invention integrates cooling channels within the side beams and support base. This reduces thermal management costs and effectively prevents thermal runaway. Furthermore, the circulation of coolant in these channels significantly improves the battery pack's safety level and enhances the overall vehicle safety, greatly reducing the probability of spontaneous combustion due to external damage in the event of a traffic accident, thus protecting the safety of passengers. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a top view of the battery box structure provided by this utility model.

[0018] Figure 2 This utility model provides Figure 1 Schematic diagram of the cross-sectional structure along the AA direction.

[0019] Figure 3 This utility model provides Figure 2 A magnified structural diagram at point B in the middle.

[0020] Figure label:

[0021] 1. Support base; 11. Side support plate; 12. Main support plate; 13. Protective connecting plate; 131. Receiving groove; 132. Mating connection part; 1321. Inclined surface; 14. Receiving unit; 2. Side beam; 3. First partition plate; 4. Second partition plate; 5. Connecting pipe; 6. Connecting pipe; 7. Cooling channel. Detailed Implementation

[0022] 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 scope of protection of this utility model.

[0023] 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 purpose of clarifying 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.

[0024] 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.

[0025] 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 indicates 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 indicates that the first feature is at a lower horizontal level than the second feature.

[0026] 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.

[0027] The following is combined Figures 1-2 This invention describes a battery casing, including a support base 1 and a side beam 2. The side beam 2 is disposed around the edge of the support base 1 to form an accommodating space within the support base 1 for installing battery cell modules. Both the support base 1 and the side beam 2 have cooling channels 7 for coolant flow, and the support base 1 and / or the side beam 2 are provided with inlets and outlets. Both the inlet (not shown in the figure) and outlet (not shown in the figure) are connected to the cooling channels 7 to form a circulating flow path for coolant. The space inside the battery casing is used to install battery cell modules. These modules generate significant heat during daily use and in extreme impact environments. In this embodiment, by providing cooling channels 7 within both the support base 1 and the side beam 2, and forming a circulating flow path, the generated heat can be carried away by the constantly flowing coolant, preventing thermal runaway.

[0028] Specifically, the support base 1 and the side beam 2 adopt a profile structure, with cavities formed inside the profile structure. Multiple cavities constitute cooling channels 7, which allow coolant to be injected and flow, carrying away the heat from the battery module during the flow. For example, aluminum alloy profiles are used, as they are easy to form and can create cavities, which in turn form cooling channels 7 to facilitate coolant flow.

[0029] The inlet and outlet can be positioned anywhere, as long as they connect to the cooling channels 7. The support base 1 can be a single plate structure with cooling channels 7 formed within it, allowing coolant circulation and preventing thermal runaway. Side beams 2 are located on both sides of the support base 1 along its length, facing each other. Each side beam 2 also has its own cooling channels 7, which connect with those in the support base 1, thus cooling the entire battery box frame and effectively preventing thermal runaway. Specifically, a connecting hole can be made at the connection point between the support base 1 and the side beams 2 to allow their cooling channels 7 to connect, enabling rapid coolant flow.

[0030] Of course, the side beam 2 and the support base 1 can be connected by welding or by integral molding, so that the side beam 2 has high structural strength and the entire box has high impact resistance.

[0031] Understandably, in conventional battery box structures, one way to achieve thermal management is to use a separate cold plate. This method requires a separate cold plate structure, increasing overall cost and manufacturing complexity. This embodiment integrates the cooling channel 7 into the support base 1 and the side beam 2. This method fully utilizes the structure of the side beam 2 and the support base 1, enabling rapid cooling without requiring external structures, resulting in a smaller footprint, a more compact overall box structure, and lower cost.

[0032] In some embodiments, such as Figure 1 As shown, the battery housing also includes an orthogonal connecting plate assembly. This assembly includes at least one first partition plate 3 arranged along the first axis L1 and at least one second partition plate 4 arranged along the second axis L2. Both ends of the second partition plate 4 are connected to the side beam 2, and the intersection of the second partition plate 4 and the first partition plate 3 is rigidly connected to divide the accommodating space into multiple accommodating units 14. The battery housing is used to support and protect the battery cell assembly. In this embodiment, the orthogonal connection of the two partition plates divides the accommodating space into smaller units, thus enabling the support base 1 to have higher structural strength and the overall structural strength of the battery housing to be higher.

[0033] Specifically, the arrangement of the first partition plate 3 and the second partition plate 4 can form an interconnected reinforcing structure on the support base 1, thereby improving the overall structural strength of the support base 1 and enabling the battery box to have higher impact resistance.

[0034] The second partition plate 4 is a rectangular column structure mounted on the support base 1, with both ends connected to two oppositely arranged side beams 2, thereby increasing the structural strength of the overall battery box frame. Specifically, both the first partition plate 3 and the second partition plate 4 are made of aluminum profiles to further enhance the overall structural strength.

[0035] It is understandable that the first partition plate 3 and the second partition plate 4 can be set on the support base 1 as reinforcing members, thereby making the overall structural strength of the battery box higher, providing higher impact resistance, and effectively preventing thermal runaway.

[0036] In conjunction with the above embodiments, the first partition plate 3 is provided with a connecting channel, which is connected to the cooling channel 7 in the support base 1. During installation, one side of the battery cell module will contact the first partition plate 3. In this embodiment, the setting of the connecting channel can further improve the cooling performance, avoid thermal runaway, and improve the overall safety factor.

[0037] Specifically, the first partition plate 3 is integrally formed with the support base 1. The first partition plate 3 is an aluminum alloy profile structure. A cavity is constructed inside the first partition plate 3. The cavity is configured as a connecting flow channel. The connecting flow channel is connected to the cooling flow channel 7, so as to serve as a section of the circulation flow path of the coolant, thereby increasing the contact area with the battery cell module and avoiding thermal runaway.

[0038] In some embodiments, the second partition plate 4 is also provided with a connecting flow channel, which is connected to the cooling flow channel 7 in the side beam 2 or the support base 1, so that coolant can flow on both the first partition plate 3 and the second partition plate 4, which is beneficial to the control of the cell temperature.

[0039] In a specific embodiment, a connecting pipe 5 is provided between the support base 1 and the first partition plate 3, and the connecting pipe 5 is used for coolant flow. The coolant needs to circulate during flow to control the temperature. In this embodiment, the connecting pipe 5 facilitates assembly, reduces processing difficulty, and allows the cooling channels 7 of different parts to be interconnected, forming a circulating flow path.

[0040] Specifically, compared to methods such as opening a connecting hole between the support base 1 and the first partition plate 3, this embodiment connects them through the connecting pipe 5 to form a circulation path and realize the flow of coolant. This method is conducive to assembly, reduces processing difficulty, and improves assembly efficiency.

[0041] In conjunction with the above embodiments, second partition plates 4 are provided at both ends and in the middle of the first partition plate 3, and the first partition plate 3 and the second partition plates 4 are perpendicular to each other. The arrangement of three second partition plates 4 increases the overall structural strength. Furthermore, the perpendicular arrangement facilitates the installation of the battery cell module.

[0042] Specifically, such as Figure 1 As shown, the accommodating space is provided with three second partition plates 4, which are arranged horizontally with the same spacing between adjacent partition plates. The first partition plate 3 is arranged vertically, and its ends and middle are connected to the second partition plates 4. This arrangement results in higher overall structural strength. The first axis L1 and the second axis L2 are perpendicular, ensuring that the first partition plate 3 is perpendicular to the three second partition plates 4. Furthermore, the interconnecting flow channels within the first partition plate 3 allow the coolant to flow rapidly through the circulation path formed by the support base 1, the side beam 2, and the first partition plate 3, thus preventing thermal runaway.

[0043] Specifically, such as Figure 1 As shown, the battery cell module has a rectangular structure. In this embodiment, the accommodating unit 14 formed by the mutually perpendicular first partition plate 3 and second partition plate 4 is also a rectangular space unit, which matches the shape of the battery cell module and facilitates the installation of the battery cell module.

[0044] In some embodiments, the support base 1 includes side support plates 11, a main support plate 12, and a protective connecting plate 13. The side support plates 11 are disposed on both sides of the main support plate 12, and the protective connecting plate 13 is disposed between the side support plates 11 and the main support plate 12. The side beam 2 is integrally formed with the side support plates 11. The support base 1 and the side beam 2, as the main load-bearing units of the battery cell module, need to have high structural strength and provide protection for the battery cells. In this embodiment, the integral forming of the side beam 2 and the side support plates 11 results in high overall structural strength, and the inclusion of the protective connecting plate 13 and the main support plate 12 facilitates the assembly of the overall structure.

[0045] Specifically, the main support plate 12 can be a single plate structure or a structure of multiple plates spliced ​​together, as described in the following embodiment. The connection between the protective connecting plate 13 and the two allows one end of the battery cell to be located at the protective connection position, thereby providing protection through the protective connecting plate 13 when subjected to impact, improving safety performance.

[0046] In conjunction with the above embodiments, the main support plate 12 includes modular splicing plates, which are alternately connected to the protective connecting plate 13 in the horizontal direction. As the bottom surface of the accommodating space, the main support plate 12 needs to provide support and protection for the battery cells. This embodiment, through the modular splicing plates and protective connecting plates 13, facilitates the design of the main support plate 12, providing effective protective support for the battery cell modules.

[0047] Specifically, such as Figure 2As shown, the main support plate 12 has a spliced ​​structure, which facilitates overall assembly and connection, and improves manufacturing efficiency. A first partition plate 3 is formed on the module splicing plate located in the middle. The first partition plate 3 enables it to have higher structural strength and withstand higher impact forces.

[0048] The protective connecting plate 13 can be connected by welding, riveting or other methods, which can give the protective connecting plate 13 higher structural strength.

[0049] In conjunction with the above embodiments, such as Figure 3 As shown, the side support plate 11 and the module splicing plate are both provided with a mating connection part 132 on the side where they connect to the protective connecting plate 13. The protective connecting plate 13 is connected to the mating connection part 132. Both sides of the protective connecting plate 13 have straight edge structures. In this embodiment, the setting of the mating connection part 132 can improve the connection efficiency of the protective connecting plate 13, thereby improving the production efficiency of the finished product.

[0050] Specifically, the connecting part 132 is integrally formed with the side support plate 11 and the module splicing plate. During connection, both sides of the protective connecting plate 13 are connected with the connecting part 132, which can improve the connection efficiency of the protective connecting plate 13.

[0051] In conjunction with the above embodiments, the mating connection portions 132 on both sides of the protective connecting plate 13 are provided with relatively inclined slopes 1321. The protective connecting plate 13 is located below the slopes 1321, and the upper surface of the protective connecting plate 13 engages with the lower edge of the slopes 1321 to jointly enclose and form a receiving groove 131. During installation, a portion of the battery cell module is located within the receiving groove 131. This method makes the installation and positioning of the battery cell module more convenient and improves its stability after installation.

[0052] Specifically, the protective connecting plate 13 serves as the bottom wall of the receiving groove 131, and the inclined surfaces 1321 on both sides serve as the side walls of the receiving groove 131. In this way, when the protective connecting plate 13 receives an impact force, the inclined surfaces 1321 can effectively disperse the force, thereby effectively protecting the battery cell part in the receiving groove 131 and improving the overall safety level.

[0053] It is understandable that by setting the inclined surface 1321 on the mating connection part 132, the stress concentration of the force can be effectively reduced, so that the force can be dispersed, thereby reducing the impact on the battery cell module and improving the overall safety performance.

[0054] In conjunction with the above embodiments, cooling channels 7 are formed within both the module splicing plate and the side support plate 11, and connecting pipes 6 are provided between adjacent module splicing plates and between the side support plate 11 and the module splicing plate. The connecting pipes 6 are used to connect the cooling channels 7. The connection of the connecting pipes 6 enables the mutual connection of the cooling channels 7, thereby forming an overall circulation path. This method can realize the flow of cooling and improve the contact surface with the battery cell module, achieving efficient cooling and avoiding thermal runaway.

[0055] Specifically, the connecting pipe 6 is located at the end of the module splicing plate. The connecting pipe 6 connects the adjacent module splicing plates and the side support plate 11, thereby enabling the coolant to flow between multiple plates and achieve cooling of the entire battery cell.

[0056] Through the above description of the embodiments, those skilled in the art can clearly understand that by integrating cooling channels 7 into both the side beam 2 and the support base 1 in each embodiment, thermal management costs can be reduced and thermal runaway can be effectively avoided. Furthermore, the circulation of coolant in this circulating flow path greatly improves the battery pack's safety protection level and enhances the overall vehicle safety factor, significantly reducing the probability of spontaneous combustion of the battery pack due to external force damage in the event of a car accident, thus protecting the personal safety of passengers. Moreover, the arrangement of the first partition plate 3 and the second partition plate 4 results in higher overall structural strength and greater impact resistance.

[0057] 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 housing, characterized in that, include: Support base; Side beam, which is provided around the edge of the support base to form an accommodating space for installing the battery cell module within the support base; The support base and the side beam are both constructed with cooling channels for coolant flow, and the support base and / or the side beam are provided with inlet and outlet. The inlet and outlet are connected to the cooling channels to form a circulating flow path for coolant flow. The support base includes a side support plate, a main support plate, and a protective connecting plate. The side support plates are located on both sides of the main support plate, and the protective connecting plate is located between the side support plates and the main support plate. The side beam and the side support plate are integrally formed.

2. The battery housing according to claim 1, characterized in that, The battery housing also includes an orthogonal connecting plate assembly, which includes at least one first partition plate disposed along a first axis direction and at least one second partition plate disposed along a second axis direction. Furthermore, both ends of the second partition plate are connected to the side beam, and the second partition plate is rigidly connected to the first partition plate at the intersection node, so as to divide the accommodating space into multiple accommodating units.

3. The battery housing according to claim 2, characterized in that, The first partition plate has a connecting channel, which is connected to the cooling channel in the support base.

4. The battery housing according to claim 3, characterized in that, A connecting pipe is provided between the support base and the first partition plate, and the connecting pipe is used for coolant flow.

5. The battery housing according to claim 2 or 3, characterized in that, The first partition plate has a second partition plate at both ends and in the middle, and the first partition plate and the second partition plate are perpendicular to each other.

6. The battery housing according to claim 1, characterized in that, The main support plate includes modular splicing plates, which are alternately connected to the protective connecting plate in the horizontal direction.

7. The battery housing according to claim 6, characterized in that, The side support plate and the module splicing plate are each provided with a mating connection part on the side where they are connected to the protective connecting plate, and the protective connecting plate is connected to the mating connection part.

8. The battery housing according to claim 7, characterized in that, The protective connecting plate has relatively inclined slopes on the mating connection parts on both sides. The protective connecting plate is located below the slopes, and the upper surface of the protective connecting plate is engaged with the lower edge of the slopes to jointly enclose and form a receiving groove.

9. The battery housing according to claim 6, characterized in that, The cooling channels are formed in both the modular splicing plate and the side support plate, and a connecting pipe is provided between adjacent modular splicing plates. A connecting pipe is also provided between the side support plate and the modular splicing plate. The connecting pipe is used to connect the cooling channels.

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