Power battery pack and automobile
Through the combined structure of the main shell and the outer shell, the battery module and electrical components are designed separately, which solves the high R&D cost problem in adapting power battery packs to different vehicle models and achieves the matching and stability of electrical components.
Patent Information
- Application Number
- CN202422352406.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-09-26
AI Technical Summary
The existing power battery packs have high R&D costs when adapting to different vehicle models, especially the compatibility of the outer shell and electrical components is difficult to effectively match, resulting in increased design difficulty and investment.
It adopts a combined structure of a main shell and an outer shell. The battery module and electrical components are stored separately. The outer shell is connected to the main shell through a sealing structure. The outer shell is designed to be detachable to adapt to different vehicle models, and the sealing structure ensures stability.
It reduces the R&D cost of power battery packs when used in different vehicle models, achieves the matching of different capacity battery cells and electrical components, and improves the stability of the combination state and the normal use of electrical components.
Smart Images
Figure CN223347903U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the field of new energy vehicle technology, and specifically relates to a power battery pack and a vehicle. Background Art
[0002] The power battery pack is the core component of new energy vehicles. It is usually formed by multiple single cells that are precisely combined and packaged. It has the characteristics of high voltage and large capacity. It is mainly responsible for storing and providing the electrical energy required by new energy vehicles to meet the vehicle's driving and power requirements.
[0003] In the prior art, a power battery pack is composed of a plurality of single batteries (which can also be understood as a module composed of a plurality of battery cells or a plurality of single batteries), related electrical components, and a casing for accommodating the single batteries and electrical components.
[0004] There are many models on the market, and the speed of update and iteration is very fast. In order to ensure that the power battery pack is fully compatible with different models, the power battery pack needs to be able to accommodate different power levels and adapt to different envelope sizes. Based on this, the inventors found that the development of existing power battery packs will incur a lot of cost investment, especially the degree of adaptability between the shell and the single battery, and the shell and the electrical components, which is a large part of the investment in product development. Utility Model Content
[0005] The embodiments of the present application provide a power battery pack and a vehicle, aiming to reduce the R&D cost of the power battery pack when applied to different vehicle models and achieve matching of battery cells of different capacities with electrical components of different performances.
[0006] To achieve the above objectives, the technical solution adopted in this application is:
[0007] Provided is a power battery pack, comprising a battery module and electrical components; and further comprising:
[0008] A main housing having a hollow interior and adapted to be fixed to a vehicle body, wherein the battery module is disposed in an interior space of the main housing; and
[0009] The outer shell adopts an internal hollow structure and is connected to the outer side of the main shell through a sealing structure; and the electrical component is arranged in the outer shell, and when the outer shell is connected to the main shell, the electrical component is electrically connected to the battery module.
[0010] In one possible implementation, the main housing includes:
[0011] A fixed shell, which is used to be fixed to the vehicle body and has a hollow interior and a single-side open structure; and
[0012] a sealing shell, detachably connected to the open surface of the fixed shell to seal the open surface of the fixed shell;
[0013] The battery module is arranged in the inner space of the fixed shell, and the outer shell is connected to the outer side surface of the fixed shell.
[0014] In a possible implementation, the battery module includes a plurality of battery cell groups spaced apart inside the main housing, and each of the battery cell groups includes a plurality of short-blade battery cells spaced apart along a straight line.
[0015] The battery module also includes a series battery that is electrically connected to the electrical component and connected to each of the short-blade batteries.
[0016] In one possible implementation, the battery module also includes multiple BMS boards corresponding one-to-one to the multiple battery cell groups; each of the BMS boards is located between two adjacent battery cell groups, or between the battery cell group and the inner wall of the main shell, and is electrically connected to the corresponding multiple short blade battery cells.
[0017] In a possible implementation, the outer shell has an extension portion, and the extension portion extends outward from an edge of a contact surface between the outer shell and the main shell, and the extension portion is connected to the main shell via a locking member.
[0018] In a possible implementation, the extension portion has a plurality of reserved holes extending toward the main shell, and the locking member is a bolt that is inserted into the plurality of reserved holes one by one and is threadedly connected to the outer side surface of the main shell.
[0019] In a possible implementation, the sealing structure includes:
[0020] An outer sealing ring is sleeved on the outer edge of the extension part, or on the outer edge of the extension part and the outer edge of the outer shell, so as to fill the gap between the extension part and the main shell, or between the outer shell and the main shell.
[0021] In a possible implementation, a side of the outer shell facing the main shell is an open structure, and the sealing structure includes:
[0022] The inner sealing ring is arranged on the side of the outer shell facing the main shell and surrounds or is embedded in the opening of the outer shell to fill the gap between the outer shell and the main shell when the outer shell and the main shell are connected.
[0023] In a possible implementation, a mounting beam is provided on the outer side of the main shell.
[0024] In the embodiment of the present application, the battery module and the electrical components are stored separately through the combination of the main shell and the outer shell, so that when different vehicle models need to be designed, the main R&D investment can be concentrated on the matching design and production of the outer shell, eliminating the adaptability changes of the overall structure caused by changes in electrical components, that is, the main shell and the battery module are not affected, and a single main shell can be connected to different outer shells, thereby reducing the design difficulty and R&D investment; at the same time, by setting a sealing structure, the stability of the outer shell and the main shell in the combined state can be guaranteed, avoiding the electrical components being affected by the layout and difficult to use normally.
[0025] Compared with the prior art, the power battery pack provided in this embodiment can effectively reduce the R&D cost of the power battery pack when applied to different vehicle models, and achieve matching between battery cells of different capacities and electrical components of different performances.
[0026] The technical solution adopted in this application also provides a car, including the power battery pack proposed in any of the above items.
[0027] The beneficial effects of the automobile provided by this embodiment are the same as the beneficial effects of the aforementioned power battery pack, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments or descriptions of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0029] Figure 1 A schematic diagram of the three-dimensional structure of a power battery pack provided in an embodiment of the present application;
[0030] Figure 2 A schematic diagram of the explosion structure of a power battery pack provided in an embodiment of the present application;
[0031] Figure 3 This is an exploded schematic diagram of the outer shell and sealing structure used in the embodiment of the present application;
[0032] Description of reference numerals:
[0033] 1. Main shell; 11. Fixed shell; 111. Mounting beam; 12. Sealing shell; 2. Outer shell; 21. Extension; 211. Reserved hole; 3. Sealing structure; 31. Outer sealing ring; 32. Inner sealing ring; 4. Series row; 5. Locking piece; 10. Battery module; 20. Electrical components. DETAILED DESCRIPTION
[0034] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.
[0035] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.
[0036] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.
[0037] Furthermore, 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 the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.
[0038] Please also refer to Figures 1 to 3 The power battery pack provided in this application is now described. The power battery pack proposed in this application includes a battery module 10, an electrical component 20, a main housing 1 and an outer housing 2.
[0039] The battery module 10 is an energy storage unit assembled from multiple battery cells (single cells) in series or parallel. The electrical components 20 generally include a main negative relay, a current sensor, a main positive relay, and a fuse. When in use, the battery module 10 and the electrical components 20 are in an electrical connection relationship so that the electrical components 20 can be used normally under the power supply of the battery module 10, and some of the electrical components 20 can act on the battery module 10 to improve the use effect of the battery module 10 and control the mode, function and output frequency of the battery module 10.
[0040] The main housing 1 has a hollow interior structure and is used to be fixed to the vehicle body, and the battery module 10 is disposed in the interior space of the main housing 1 .
[0041] The outer shell 2 adopts an internal hollow structure and is connected to the outer side of the main shell 1 through a sealing structure 3; it should be noted that this sealing structure 3 is a structure proposed based on the detachable connection relationship between the outer shell 2 and the main shell 1, and is capable of filling the gap between the outer shell 2 and the main shell 1.
[0042] Furthermore, the electrical component 20 is disposed in the outer shell 2 ; based on this, when the outer shell 2 is connected to the main shell 1 , the sealing structure 3 fills the gap between the outer shell 2 and the main shell 1 , and the electrical component 20 is electrically connected to the battery module 10 .
[0043] In the embodiment of the present application, the battery module 10 and the electrical component 20 are stored separately through the combination of the main shell 1 and the outer shell 2, so that when different vehicle models need to be designed, the main R&D investment can be concentrated on the matching design and production of the outer shell 2, eliminating the adaptability changes of the overall structure caused by changes in the electrical component 20, that is, the main shell 1 and the battery module 10 are not affected, and a single main shell 1 can be connected to different outer shells 2, thereby reducing the design difficulty and R&D investment; at the same time, by providing a sealing structure 3, the stability of the outer shell 2 and the main shell 1 in the combined state can be guaranteed, avoiding the electrical component 20 being affected by the layout and difficult to use normally.
[0044] Compared with the prior art, the power battery pack provided in this embodiment can effectively reduce the R&D cost of the power battery pack when applied to different vehicle models, and achieve matching between battery cells of different capacities and electrical components 20 of different performances.
[0045] In some embodiments, as Figure 1 and Figure 2 As shown, the main housing 1 includes a fixed housing 11 and a sealing housing 12 .
[0046] The fixed shell 11 is used to be fixed on the vehicle body, and adopts a structure with a hollow interior and a single-side opening. Under normal conditions, when the fixed shell 11 is connected to the vehicle body, its opening faces downward and the opening surface is flush with the vehicle chassis.
[0047] The sealing shell 12 is detachably connected to the open surface of the fixed shell 11 to seal the open surface of the fixed shell 11, thereby forming a closed chamber.
[0048] Based on this, the battery module 10 is arranged in the internal space of the fixed shell 11, and the outer shell 2 is connected to the outer side of the fixed shell 11; it should be pointed out that the outer side of the fixed shell 11 is provided with a reserved port for the passage of the circuit, so that when the outer shell 2 and the fixed shell 11 are connected, the circuit related to the electrical component 20 can extend into the interior of the fixed shell 11 through this reserved port.
[0049] By adopting the above technical solution, when the battery module 10 needs to be adjusted or repaired, the battery module 10 can be immediately opened by separating the sealing shell 12 and the fixed shell 11, thereby facilitating the operator's operation.
[0050] In some embodiments, as Figure 2 As shown, the battery module 10 includes a plurality of cell groups spaced apart inside the main shell 1, and the arrangement of the plurality of cell groups can be rectangular or linear to adapt to different main shell 1 structures; in this embodiment, there are four cell groups, which are arranged in a rectangular shape inside the main shell 1 to achieve the concept of modularization. Each cell group includes a plurality of short blade cells fixedly arranged inside the main shell 1 and spaced apart along a straight line; wherein, the short blade cell is a thin, long square shell battery, which is shorter than the traditional long blade battery; in the prior art, the short blade cell is composed of a plurality of cells arranged in combination, but the length of each cell is relatively short, and there is usually no additional protective shell on the outside, or it is wrapped by an aluminum shell or steel shell, and the shape is a rectangular parallelepiped or cylindrical.
[0051] In addition, the battery module 10 also includes a series row 4 electrically connected to the electrical component 20 and also connected to each short-blade battery cell, that is, each short-blade battery cell is electrically connected to the electrical component 20 through the series row 4, so that multiple units or components in the electrical component 20 are arranged in a specific order, thereby forming a single, continuous path or link.
[0052] By adopting the above technical solution, on the one hand, the short-blade battery cells are more adaptable to the internal space of the main housing 1, ensuring the structural stability of the main housing 1 and battery module 10 in the assembled state; on the other hand, the arrangement of the short-blade battery cells in a limited space has certain advantages. While fully utilizing the internal space of the main housing 1, a certain amount of space can be left as an installation area for subsequent modification, maintenance, etc. In addition, because the short-blade battery cells have special properties such as high energy density, durability, and vibration resistance, the battery module 10 composed of short-blade battery cells has better electrical performance.
[0053] In some embodiments, the battery module 10 also includes multiple BMS boards corresponding one-to-one to multiple battery cell groups; each BMS board is located between two adjacent battery cell groups, or between a battery cell group and the inner wall of the main shell 1, and is electrically connected to the corresponding multiple short-blade battery cells; in this embodiment, there are four BMS boards, and each BMS board is located between its corresponding battery cell group and another battery cell group adjacent to this battery cell group.
[0054] By adopting the above technical solution, the original structural design of the BMS control panel is eliminated, thereby freeing up the space occupied by the BMS control panel, allowing more space inside the main shell 1 to arrange the power core group, and making the arrangement of the internal structure of the main shell 1 more compact, thereby improving the rationality of space utilization in the product structure.
[0055] In some embodiments, as Figure 3 As shown, the outer shell 2 has an extension portion 21, and this extension portion 21 extends outward from the edge of the contact surface between the outer shell 2 and the main shell 1 to increase the contact area between the outer shell 2 and the main shell 1; and the extension portion 21 is connected to the main shell 1 through a locking member 5 to achieve connection between the outer shell 2 and the main shell 1 under full contact conditions.
[0056] In some embodiments, as Figure 3 As shown, the extension portion 21 has a plurality of reserved holes 211 passing through the main housing 1 , and the locking members 5 are a plurality of bolts that are inserted into the plurality of reserved holes 211 one by one and are all threadedly connected to the outer side surface of the main housing 1 .
[0057] Among them, the bolts have the characteristic of quick disassembly, which facilitates the installation and separation of the main shell 1 and the outer shell 2; at the same time, the plug-in relationship between the bolts and the reserved holes 211 can ensure the stable positioning of the outer shell 2 and the main shell 1, avoiding the problem of misassembly.
[0058] In some embodiments, as Figure 3 As shown, the sealing structure 3 includes an outer sealing ring 31 .
[0059] The outer sealing ring 31 is sleeved on the outer edge of the extension portion 21, or is sleeved on the outer edge of the extension portion 21 and the outer edge of the outer shell 2; specifically, when the extension portion 21 is annular and fixedly sleeved on the outer edge of the outer shell 2, the outer sealing ring 31 is also annular and sleeved on the outer edge of the extension portion 21; and when the extension portion 21 is sheet-shaped and fixed to the outer edge of the outer shell 2, the outer sealing ring 31 has an end-to-end structure, and has a protruding structure on this structure that is adapted to the extension portion 21, so as to be sleeved on the structure formed by the outer edge of the extension portion 21 and the outer edge of the outer shell 2.
[0060] By adopting the above technical solution, the outer sealing ring 31 can fill the gap between the extension part 21 and the main shell 1, and between the outer shell 2 and the main shell 1, thereby achieving a certain water-blocking effect and improving the service life of the product.
[0061] In some embodiments, as Figure 3 As shown, the side of the outer shell 2 facing the main shell 1 is an open structure, and the sealing structure 3 includes an inner sealing ring 32.
[0062] The inner sealing ring 32 is arranged on the side of the outer shell 2 facing the main shell 1, and is arranged around or embedded in the open part of the outer shell 2; it should be supplemented that, in the cooperation between the inner sealing ring 32 and the outer sealing ring 31, the inner sealing ring 32 is on the inner side of the outer sealing ring 31, so that when the outer shell 2 is connected to the main shell 1, the inner sealing ring 32 fills the gap between the outer shell 2 and the main shell 1, further improving the sealing effect, so that the battery pack reaches the IP68 waterproof level.
[0063] It should be noted that the sealing structure 3 may further include a third sealing ring arranged between the inner sealing ring 32 and the outer sealing ring 31, so that the dustproof level of the battery pack reaches IPX9K.
[0064] In some embodiments, as Figure 1 and Figure 2 As shown, the outer surface of the main shell 1 has a mounting beam 111 to enhance the structural strength of the main shell 1 and cooperate with the vehicle body to ensure that the battery module 10 in the main shell 1 maintains a stable posture when the vehicle is driving or stationary, avoiding damage caused by vibration or impact.
[0065] It should be noted that the number of mounting beams 111 is not fixed, but is determined based on specific design requirements and conditions. In this embodiment, the main housing 1 has a quadrilateral cross-section and includes two mounting beams 111, one located on either side of the main housing 1 facing the vehicle body in the X direction or the other side facing the vehicle body in the Y direction.
[0066] In some embodiments, as Figure 1 and Figure 2 As shown, the fixed shell 11 adopts a structure with a quadrilateral cross-section, and the fixed shell 11 has mounting beams 111 on both sides of the X direction or the Y direction of the body. The mounting beams 111 can increase the contact area between the fixed shell 11 and the body, ensuring the fixing effect of the main shell 1 when it is fixed to the body.
[0067] Based on this, Figure 2 As shown, the sealing shell 12 is embedded in the inner side of the fixed shell 11 to avoid the design position of the mounting beam 111 and ensure the overall structural balance and stability.
[0068] Based on the same inventive concept, an embodiment of the present application also provides a car, comprising a power battery pack as proposed in any of the aforementioned items.
[0069] The beneficial effects of the automobile provided by this embodiment are the same as the beneficial effects of the aforementioned power battery pack, and will not be repeated here.
[0070] The above content is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.
Claims
1. A power battery pack, comprising a battery module (10) and an electrical component (20); characterized in that: Also includes: The main housing (1) has a hollow interior structure and is used for being fixed to a vehicle body, and the battery module (10) is arranged in the interior space of the main housing (1); as well as The outer shell (2) has a hollow interior and is connected to the outer side of the main shell (1) via a sealing structure (3); the electrical component (20) is disposed within the outer shell (2), and when the outer shell (2) is connected to the main shell (1), the electrical component (20) is electrically connected to the battery module (10).
2. The power battery pack according to claim 1, characterized in that: The main housing (1) comprises: A fixed shell (11) is used for being fixed on the vehicle body and has a structure with a hollow interior and a single-side opening; and a sealing shell (12) detachably connected to the open surface of the fixed shell (11) to seal the open surface of the fixed shell (11); The battery module (10) is arranged in the internal space of the fixed shell (11), and the outer shell (2) is connected to the outer side surface of the fixed shell (11).
3. The power battery pack according to claim 1 or 2, characterized in that: The battery module (10) comprises a plurality of battery cell groups spaced apart inside the main housing (1), and each of the battery cell groups comprises a plurality of short-blade battery cells spaced apart along a straight line. The battery module (10) further includes a series connection row (4) electrically connected to the electrical element (20) and connected to each of the short-blade battery cells.
4. The power battery pack according to claim 3, characterized in that: The battery module (10) further includes a plurality of BMS boards corresponding one-to-one to the plurality of battery cell groups; each of the BMS boards is located between two adjacent battery cell groups, or between the battery cell group and the inner wall of the main housing (1), and is electrically connected to the corresponding plurality of short blade battery cells.
5. The power battery pack according to claim 1, wherein: The outer shell (2) has an extension portion (21), and the extension portion (21) extends outward from the edge of the contact surface between the outer shell (2) and the main shell (1), and the extension portion (21) is connected to the main shell (1) via a locking member (5).
6. The power battery pack according to claim 5, characterized in that: The extension portion (21) has a plurality of reserved holes (211) extending toward the main housing (1), and the locking member (5) is a bolt that is inserted into the plurality of reserved holes (211) one by one and is threadedly connected to the outer side surface of the main housing (1).
7. The power battery pack according to claim 5, characterized in that: The sealing structure (3) comprises: An outer sealing ring (31) is sleeved on the outer edge of the extension portion (21), or on the outer edge of the extension portion (21) and the outer edge of the outer shell (2), so as to fill the gap between the extension portion (21) and the main shell (1), and between the outer shell (2) and the main shell (1).
8. The power battery pack according to claim 1 or 7, characterized in that: The side of the outer shell (2) facing the main shell (1) is an open structure, and the sealing structure (3) includes: An inner sealing ring (32) is arranged on a side of the outer shell (2) facing the main shell (1), and surrounds or is embedded in an opening of the outer shell (2) to fill a gap between the outer shell (2) and the main shell (1) when the outer shell (2) and the main shell (1) are connected.
9. The power battery pack according to claim 1, wherein: A mounting beam (111) is provided on the outer side of the main housing (1).
10. Automobile, characterized in that A power battery pack comprising any one of claims 1 to 9.