Compact battery box and battery pack

Abstract

A compact battery box and a battery pack, the compact battery box (1) being arranged within a mounting main body, and comprising: a battery cell module (11); a battery box case (12), the battery box case (12) comprising a lower cover (121) and an upper cover (122) matching the lower cover (121), the bottom of the lower cover (121) being provided with a liquid cooling plate (123), the upper cover (122) being fastened on the lower cover (121) and the two coming together to form a battery accommodating cavity for accommodating the battery cell module (11), the liquid cooling plate (123) being provided with a fixing structure (123a) connected to the mounting main body, one end of the lower cover (121) being provided with an end cover plate (121b), and the end cover plate (121b) being provided with a mounting hole (121c); and a connector mounting plate (13), the connector mounting plate (13) covering the mounting hole (121c) from an outer side and being detachably fixed to an edge of the mounting hole (121c), and a copper bar of the connector mounting plate (13) passing through the mounting hole (121c) and being detachably connected to the battery cell module (11). The problem in the existing technology that it is difficult to have both high energy density and convenience of maintenance in power batteries is solved.

Description

Compact battery box and battery pack Technical Field

[0001] This invention relates to the field of battery swapping technology, and in particular to a compact battery box and battery pack. Background Technology

[0002] With the continuous development of society and the growing awareness of environmental protection, new energy sources are gradually becoming the preferred power source for transportation, especially with the increasingly widespread application of battery technology. Under this trend, electrification has become an important development direction for the truck industry. As a key transportation tool, the electrification process of trucks is not only driven by their heavy-duty and long-distance transportation needs, but also faces the challenge that existing charging technologies cannot meet their high-frequency, fast-charging requirements. Therefore, electric trucks with swappable batteries have developed rapidly in recent years, becoming a focus of the industry.

[0003] With the imminent implementation of battery swapping standards, electric trucks must maximize their energy capacity within the space of a standard battery pack to achieve longer driving ranges. Theoretically, this means arranging battery cell modules as compactly as possible within a given space. This presents two problems: First, existing battery packs are mostly installed using side-mounted structures, requiring reserved space on both sides during the design phase. This reserved space significantly occupies internal space, limiting the number and size of battery cells that can be placed. Second, while higher compactness of the battery cell modules within the battery pack results in greater energy density, this design also increases maintenance costs. Currently, the front connector mounting panel of most standard battery packs uses brackets installed inside the battery pack. The overly compact cell arrangement leads to limited working space, often requiring the entire upper shell to be disassembled or a separate maintenance window to perform necessary maintenance. Therefore, the industry urgently needs a battery pack structure design that can both improve energy density and simplify maintenance procedures. Summary of the Invention

[0004] In view of the shortcomings of the prior art described above, the technical problem to be solved by the present invention is to provide a compact battery box and battery pack, which solves the problem that power batteries in the prior art are difficult to balance high energy density and ease of maintenance.

[0005] To address the aforementioned technical problems, the present invention provides a compact battery box, disposed within a mounting body, comprising:

[0006] Battery cell module;

[0007] The battery box shell includes a lower cover and an upper cover adapted to the lower cover. A liquid cooling plate is provided at the bottom of the lower cover. The upper cover is fastened to the lower cover and together they form a battery housing cavity for accommodating the battery cell module. A fixing structure connected to the mounting body is provided on the liquid cooling plate. An end cover plate is provided at one end of the lower cover, and mounting holes are provided on the end cover plate.

[0008] A connector mounting plate, which covers the mounting hole from the outside and is detachably fixed to the edge of the mounting hole, wherein the copper busbar of the connector mounting plate passes through the mounting hole and is detachably connected to the battery cell module.

[0009] As a more preferred solution, the fixing structure is a fixing hole formed on the liquid cooling plate. Using the fixing hole as the fixing structure has two advantages: firstly, the structure is simple and facilitates the installation of the battery box shell and the mounting body; secondly, the fixing hole can be easily machined on the liquid cooling plate, which improves the convenience of production and manufacturing.

[0010] As a more preferred embodiment, the fixing holes include multiple holes, which are arranged on the edge of the liquid cooling plate and avoid the flow channels inside the liquid cooling plate; the multiple fixing holes improve the installation strength between the battery box shell and the mounting body, and avoiding the flow channels inside the liquid cooling plate can prevent the leakage of coolant inside the liquid cooling plate.

[0011] As a more preferred embodiment, the battery module includes multiple battery cells, and the series and parallel connection of the multiple battery cells provides the required voltage and current to the battery module.

[0012] As a more preferred solution, the battery cell module includes a CCS assembly, and multiple battery cells are directly connected to aluminum busbars on the CCS assembly, eliminating the need for a large number of series copper busbars, further saving space and improving energy density.

[0013] As a more preferred embodiment, the lower cover includes a lower cover plate and two end cover plates, with one end of each end cover plate connected to both ends of the lower cover plate. Correspondingly, the upper cover includes an upper cover plate and two side cover plates, with one end of each side cover plate connected to both sides of the upper cover plate. When the upper cover plate and the lower cover plate are fastened together, the other end of each end cover plate is connected to the corresponding ends of the upper cover plate, and the two ends of each side cover plate are connected to the corresponding ends of the lower cover plate. Thus, before the upper cover plate and the lower cover plate are fastened together, there are no side cover plates to obstruct the two sides of the lower cover, providing more operating space and making assembly more convenient when installing the battery cell module on the lower cover. At the same time, due to the presence of the end cover plates on the lower cover, the connector mounting plate is directly connected and fixed to the end cover plates before the upper cover is fastened together. The operating space on the sides of the lower cover further facilitates the cumbersome wiring connections and connection fixation during the assembly of the connector mounting plate.

[0014] As a more preferred embodiment, the compact battery box also includes a fireproof plate disposed between the top cover and the battery cell module. This fireproof plate protects the battery from fire, preventing the spread of flames and heat in the event of thermal runaway. The fireproof plate typically possesses excellent heat resistance, flame retardancy, and electrical insulation, remaining stable under extreme conditions, thus providing additional safety for the battery system.

[0015] As a more preferred embodiment, the compact battery box also includes a battery box sealing gasket disposed between the upper cover and the lower cover to seal the gap between the upper cover and the lower cover, improve sealing performance, and prevent external impurities from entering the battery box shell and interfering with the internal electrical components, thus affecting service life.

[0016] As a more preferred embodiment, the compact battery box also includes a BMS slave mounting assembly, which is installed inside the end cover and is responsible for collecting and managing information from the battery cells or batteries and transmitting this information to the main controller for further processing.

[0017] To address the above problems, the present invention also provides a battery pack, comprising:

[0018] A fixed frame, wherein the fixed frame is provided with at least one mounting cavity, and the bottom of the mounting cavity is provided with a mounting structure;

[0019] As described above, a compact battery box corresponds one-to-one with the mounting cavity. The compact battery box is disposed in the mounting cavity and fixed to the mounting structure by a fixing structure at the bottom.

[0020] As described above, the compact battery box and battery pack of the present invention have the following beneficial effects: When in use, the compact battery box of the present invention is connected to the mounting body via a fixing structure provided on the liquid cooling plate. Compared to traditional battery boxes that are fixed to the side, the fixing structure is directly set on the liquid cooling plate, without occupying the space on the side of the battery box. Therefore, there is no need to reserve space on the side for the fixing structure, greatly increasing the cell storage space inside the battery box. This allows for the storage of more and larger cells, thereby improving the energy density of the battery box. Furthermore, since the fixing structure is set on the liquid cooling plate, it is equivalent to stacking the installation space of the liquid cooling plate and the required installation space of the fixing structure together. The setting of the fixing structure does not increase the thickness of the battery box, thus improving the energy density of the battery box. The cell storage space inside the battery box is unaffected. Furthermore, when maintaining a compact battery box with a compact arrangement of cell modules, since the internal space of the compact battery box is completely filled with cell modules, maintenance work generally needs to be carried out by opening the top and bottom covers, which undoubtedly increases the workload of maintenance. In the compact battery box of the present invention, since the connector mounting plate covers the mounting hole from the outside and is detachably fixed to the edge of the mounting hole, the connector mounting plate can be directly removed from the outside of the compact battery box during maintenance. After removing the connector mounting plate, the copper busbar can be easily separated from the cell module, thereby completely removing the connector mounting plate, and thus facilitating the maintenance of the connector mounting plate and internal structure.

[0021] The battery pack of the present invention adopts the above-mentioned compact battery box, which is set in the mounting cavity of the fixed frame and fixed by the fixing structure and the mounting structure. Under the premise that the size of the mounting cavity remains unchanged, the cell storage space in the battery box is greatly increased, and the density of the entire battery pack is improved. When the new energy vehicle uses the above-mentioned battery pack as a power source, it can obtain more abundant power.

[0022] The compact battery box and battery pack of the present invention optimize the internal space structure of the battery box by combining the fixing structure with the liquid cooling plate, saving side space and greatly increasing the cell storage space of the compact battery box, thereby improving energy density. At the same time, the adaptive adjustment of the connector mounting plate fixing method improves the convenience of maintenance of the compact battery box and battery pack of the present invention, solving the problem that power batteries in the prior art are difficult to balance high energy density and maintenance convenience. Attached Figure Description

[0023] Figure 1 shows an exploded view of the compact battery box of the present invention;

[0024] Figure 2 shows a schematic diagram of the cell module of the compact battery box of the present invention;

[0025] Figure 3 shows a schematic diagram of the fixing structure of the compact battery box of the present invention;

[0026] Figure 4 shows an assembly schematic diagram of the compact battery box of the present invention;

[0027] Figure 5 shows a schematic diagram of the disassembly connector mounting plate of the compact battery box of the present invention;

[0028] Figure 6 shows a schematic diagram of the compact battery box and battery pack of the present invention.

[0029] Component Numbering Explanation 1 Compact Battery Box 11 Cell Module 111 Cell 12 Battery Box Shell 121 Lower Cover 121a Lower Cover Plate 121b End Cover Plate 121c Mounting Hole 122 Upper Cover 122a Upper Cover Plate 122b Side Cover Plate 123 Liquid Cooling Plate 123a Fixing Structure 13 Connector Mounting Plate 14 Fireproof Plate 15 Battery Box Sealing Gasket 16 Connector Mounting Plate Sealing Gasket 17 BMS Slave Mounting Assembly 2 Fixing Frame 21 Mounting Cavity 22 Fixing Rod 23 Fixing Beam Detailed Implementation

[0030] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0031] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the implementation of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the disclosed technical content. The following detailed description should not be considered restrictive, and the scope of the embodiments of this application is limited only by the claims of the published patents. The terminology used herein is for describing specific embodiments only and is not intended to limit the application. Spatial terms such as "upper," "lower," "left," "right," "below," "below," "lower part," "above," "upper part," etc., may be used in the text to illustrate the relationship between one element or feature shown in the figures and another element or feature.

[0032] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "holding" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] Furthermore, as used herein, the singular forms “a,” “one,” and “the” are intended to also include the plural forms, unless the context indicates otherwise. It should be further understood that the terms “comprising,” “including,” and “contains” are also intended to include the plural forms. " "Including" indicates the presence of the stated feature, operation, element, component, item, type, and / or group, but does not exclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, types, and / or groups. The terms "or" and "and / or" as used herein are to be interpreted inclusively, or mean any one or any combination thereof. Therefore, "A, B, or C" or "A, B, and / or C" means "any one of the following: A; B; C; A and B; A and C; B and C; A, B, and C." Exceptions to this definition occur only when the combination of elements, functions, or operations is inherently mutually exclusive in some way.

[0034] Glossary: ​​CCS Module: Cells Contact System (CCS) is a key component in power battery pack assembly. It serves as a crucial bridge connecting the internal cells (111) to external electrical components, and its integrated reliability directly impacts the safety of the battery pack. The CCS module integrates signal acquisition components, plastic structural parts, copper and aluminum busbars, etc., connected into a single unit through processes such as thermoforming or riveting. It enables high-voltage series and parallel connection of the cells (111), as well as battery temperature and cell voltage sampling functions. Through information sampling components and connectors, it transmits temperature and voltage information to the BMS system, and is part of the BMS system.

[0035] BMS: Battery Management System (BMS) is an electronic system responsible for monitoring and managing the operating status of a rechargeable battery. Core functions of a BMS include protecting the battery from exceeding its safe operating range, monitoring battery voltage, temperature, and current in real time, generating and reporting relevant data, controlling the battery's operating environment, and ensuring battery balance. By performing these functions, the BMS ensures the safe, stable, and efficient operation of the battery system and is primarily used in complex or large battery systems, such as electric vehicles, energy storage systems, and other high-performance battery applications.

[0036] As shown in Figures 1 to 6, the present invention provides a compact battery box 1, disposed within a mounting body, comprising:

[0037] Battery cell module 11;

[0038] The battery box housing 12 includes a lower cover 121 and an upper cover 122 adapted to the lower cover 121. A liquid cooling plate 123 is provided at the bottom of the lower cover 121. The upper cover 122 is fastened to the lower cover 121 and together they form a battery housing cavity for accommodating the battery cell module 11. A fixing structure 123a connected to the mounting body is provided on the liquid cooling plate 123. An end cover plate 121b is provided at one end of the lower cover 121. A mounting hole 121c is provided on the end cover plate 121b.

[0039] The connector mounting plate 13 covers the mounting hole 121c from the outside and is detachably fixed to the edge of the mounting hole 121c. The copper busbar of the connector mounting plate 13 passes through the mounting hole 121c and is detachably connected to the battery cell module 11.

[0040] To better illustrate the compact battery box 1 of the present invention, the following specific application will be used as an example: In use, the compact battery box 1 of the present invention is connected to the mounting body via a fixing structure 123a provided on the liquid cooling plate 123. Compared to traditional battery boxes that are fixed from the side, the fixing structure 123a is directly mounted on the liquid cooling plate 123, without occupying the space on the side of the battery box. Therefore, there is no need to reserve space on the side for the fixing structure 123a, greatly increasing the space for accommodating the battery cells 111 inside the battery box. This allows for the accommodation of more and larger battery cells 111, thereby improving the energy density of the battery box. Furthermore, since the fixing structure 123a is mounted on the liquid cooling plate 123, it is equivalent to stacking the installation space of the liquid cooling plate 123 with the required installation space of the fixing structure 123a together. The installation of the fixing structure 123a does not increase the thickness of the battery box. This does not affect the space for housing the battery cells 111 inside the battery box. Furthermore, when maintaining the compact battery box 1 with the compactly arranged battery cell modules 11, since the internal space of the compact battery box 1 is completely filled by the battery cell modules 11, the maintenance work generally needs to be carried out by opening the upper cover 122 and the lower cover 121, which undoubtedly increases the workload of maintenance. In the compact battery box 1 of the present invention, since the connector mounting plate 13 covers the mounting hole 121c from the outside and is detachably fixed to the edge of the mounting hole 121c, the connector mounting plate 13 can be directly removed from the outside of the compact battery box 1 during maintenance, as shown in Figure 5. After removing the connector mounting plate 13, the copper busbar can be easily separated from the battery cell module 11, thereby completely removing the connector mounting plate 13, and thus facilitating the maintenance of the connector mounting plate 13 and its internal structure.

[0041] In some embodiments of the present invention, as shown in FIG1, a plurality of through holes are provided on the outer edge of the mounting hole 121c, and a plurality of limiting holes corresponding to the through holes are also provided on the connector mounting base. By using a plurality of bolts passing through the corresponding limiting holes and through holes from the outside, the connector mounting base is detachably fixed to the outside of the end cover plate 121b and the mounting hole 121c is sealed. The copper busbar can also be detachably connected to the battery cell module 11 by a similar bolt fixing method as described above. More specifically, after removing the bolts between the connector mounting base and the end cover plate 121b, the connector mounting base is folded upward at a certain angle to expose the fixing bolts between the copper busbar and the battery cell module 11. After removal, the connector mounting base can be removed.

[0042] In some embodiments of the present invention, as shown in FIG3, the fixing structure 123a is a fixing hole formed on the liquid cooling plate 123. Using the fixing hole as the fixing structure 123a has the advantages of simple structure and convenient installation of battery box shell 12 and mounting body. On the other hand, the fixing hole can be well processed on the liquid cooling plate 123, which improves the convenience of production and manufacturing.

[0043] In some embodiments of the present invention, as shown in FIG3, the fixing holes include a plurality of holes, which are arranged on the edge of the liquid cooling plate 123 and avoid the flow channels inside the liquid cooling plate 123. The plurality of fixing holes improve the installation strength between the battery box housing 12 and the mounting body, and avoiding the flow channels inside the liquid cooling plate 123 can prevent the leakage of coolant inside the liquid cooling plate 123. More specifically, in this embodiment, a total of eight fixing holes are provided, which are distributed on both sides of the liquid cooling plate 123 for easy fixing.

[0044] In some embodiments of the present invention, as shown in Figures 1 and 2, the cell module 11 includes a plurality of cells 111, and the series and parallel connection of the plurality of cells 111 provides the required voltage and current to the cell module 11. More specifically, in this embodiment, the cell module 11 is a large module composed of 48 cells 111. The cells 111 are arranged in three rows in the battery housing cavity. All cells 111 are bonded together by a buffer insulating component, and the electrical connections of the cells 111 are all connected through aluminum busbars in the CCS assembly above the module, eliminating the need for series copper busbars between modules. In addition, by selecting cells 11 of appropriate width... 1. The internal space of the battery box is maximized for the battery modules. Calculations show that 94.7% of the internal space of the battery pack is occupied by the battery modules. The mounting point of the battery box assembly is integrated at the bottom of the battery box, making full use of the space in the height direction of the battery box assembly and significantly improving the energy density of the battery box. The compact battery box 1 involved in this embodiment can reach 50.077 kWh. Furthermore, the lower cover plate 121a is also provided with a mounting beam. 48 battery cells 111 are connected to the mounting beam by long bolts. At the same time, the bottom of the battery cells 111 is bonded to the middle mounting surface of the lower cover plate 121a by thermally conductive structural adhesive.

[0045] In some embodiments of the present invention, the battery cell module 11 includes a CCS assembly, and a plurality of battery cells 111 are directly connected to aluminum busbars on the CCS assembly, eliminating the need for a large number of series copper busbars, further saving space and improving energy density.

[0046] In some embodiments of the present invention, as shown in Figures 1 and 4, the lower cover 121 includes a lower cover plate 121a and two end cover plates 121b, one end of each end cover plate 121b being connected to both ends of the lower cover plate 121a. Correspondingly, the upper cover 122 includes an upper cover plate 122a and two side cover plates 122b, one end of each side cover plate 122b being connected to both sides of the upper cover plate 122a. When the upper cover plate 122a and the lower cover plate 121a are fastened together, the other end of each end cover plate 121b is connected to the corresponding ends of the upper cover plate 122a. The two ends are respectively connected to the two sides corresponding to the lower cover plate 121a; thus, before the upper cover plate 122a and the lower cover plate 121a are fastened together, the two sides of the lower cover 121 are not covered by side cover plates 122b. When the battery cell module 11 is installed on the lower cover 121, the operating space is larger and the assembly is more convenient. At the same time, due to the presence of the end cover plate 121b of the lower cover 121, before the upper cover 122 is fastened together, the connector mounting plate 13 is directly connected and fixed to the end cover plate 121b. The operating space on the side of the lower cover 121 further facilitates the complicated wiring connection and connection fixation during the assembly of the connector mounting plate 13.

[0047] In some embodiments of the present invention, the liquid cooling plate 123 is provided with a connecting structure, and the liquid cooling plate 123 is connected to the lower cover plate 121a through the connecting structure.

[0048] In some embodiments of the present invention, as shown in FIG1, the compact battery box 1 further includes a fireproof plate 14, which is disposed between the upper cover 122 and the cell module 11 for battery protection and fire prevention, to prevent the spread of flames and heat diffusion in the event of thermal runaway. The fireproof plate 14 typically has excellent heat resistance, flame retardancy, and electrical insulation, and can remain stable under extreme conditions, thereby providing additional safety for the battery system. Furthermore, in this embodiment, the fireproof plate 14 is integrally bonded to the bottom of the upper cover plate 122a with silicone foam double-sided adhesive to form the battery box upper cover 122 sub-assembly. More specifically, the main functions of the fireproof plate 14 also include: heat insulation: the fireproof plate 14 can slow down the diffusion of heat inside the battery pack, effectively delay the battery heat diffusion time, and improve the fire safety of the battery pack. Fireproof: After the battery experiences thermal runaway, the fireproof plate 14 can effectively isolate the flame and control the spread of the fire due to its excellent flame-retardant properties; Structural strength: Some fireproof plate 14 designs can also increase the structural strength of the battery cover, while its cavity and ribs form a gas channel, which helps to directionally release thermal runaway gases; High temperature resistance: The fireproof plate 14 can usually remain stable in high temperature environments, and the long-term working temperature can reach 500℃ to 800℃, with good high temperature insulation properties; Electrical insulation: Prevents short circuits and arcing inside the battery pack.

[0049] In some embodiments of the present invention, as shown in FIG1, the compact battery box 1 further includes a battery box sealing gasket 15 disposed between the upper cover 122 and the lower cover 121, which seals the gap between the upper cover 122 and the lower cover 121, improves the sealing performance, and prevents external impurities from entering the battery box shell 12, interfering with the internal electrical components and affecting the service life.

[0050] In some embodiments of the present invention, as shown in FIG1, the compact battery box 1 further includes a connector mounting plate sealing gasket 16 disposed between the connector mounting plate 13 and the end cover plate 121b, and the connector mounting plate sealing gasket 16 is bonded to the outside of the end cover plate 121b by its own double-sided adhesive.

[0051] In some embodiments of the present invention, as shown in FIG1, the compact battery box 1 further includes a BMS slave mounting assembly 17, which is mounted on the inner side of the end cover plate 121b and is responsible for collecting and managing information of the battery cells or batteries and transmitting this information to the main controller for further processing.

[0052] To address the above problems, as shown in Figure 6, the present invention also provides a battery pack, comprising:

[0053] A fixed frame 2, wherein the fixed frame 2 is provided with not less than one mounting cavity 21, and the bottom of the mounting cavity 21 is provided with a mounting structure;

[0054] The compact battery box 1 described above corresponds one-to-one with the mounting cavity 21. The compact battery box 1 is disposed in the mounting cavity 21 and is fixed to the mounting structure by the bottom fixing structure 123a.

[0055] To better illustrate the battery pack of the present invention, the following specific application will be used as an example: The battery pack of the present invention adopts the aforementioned compact battery box 1, which is placed in the mounting cavity 21 of the fixed frame 2 and fixed by the fixing structure 123a and the mounting structure. Under the premise that the size of the mounting cavity 21 remains unchanged, the space for accommodating the cells 111 inside the battery box is greatly increased, thereby improving the overall density of the battery pack. When new energy vehicles use the aforementioned battery pack as a power source, they can obtain more abundant power. It can be seen that the compact battery box and battery pack of the present invention optimize the internal space structure of the battery box by combining the fixing structure 123a with the liquid cooling plate 123, saving the side space and greatly increasing the space for accommodating the cells 111 in the compact battery box 1, thereby improving the energy density. At the same time, the adaptive adjustment of the fixing method of the connector mounting plate 13 improves the convenience of maintenance of the compact battery box and battery pack of the present invention, solving the problem that power batteries in the prior art are difficult to balance high energy density and maintenance convenience.

[0056] In some embodiments of the present invention, as shown in FIG6, the fixed frame 2 is provided with a total of eight mounting cavities 21. The eight mounting cavities 21 are arranged in two rows and vertically within the fixed frame 2, forming a total of four layers, with each layer including two cavities. Similarly, the compact battery box 1 also includes eight cavities. Considering that the power of a single compact battery box 1 can reach 50.077 kWh, the power of the entire battery pack can exceed 400 kWh.

[0057] In some embodiments of the present invention, as shown in FIG6, the fixed frame 2 is a rectangular frame structure composed of multiple fixed rods 22, and the mounting structure is a locking hole provided on the fixed frame 2 corresponding to the fixing hole; in this embodiment, a fixed beam 23 connected to the rectangular frame structure is provided at the bottom of the mounting cavity of each layer, and the locking hole is also provided on the fixed beam 23 at the position corresponding to the fixing hole.

[0058] In summary, the compact battery box and battery pack of the present invention have the following advantages:

[0059] 1. Optimized space utilization: By directly setting the fixing structure 123a on the liquid cooling plate 123, the side space of the battery box is saved and the storage space of the battery cell 111 is increased.

[0060] 2. Increased energy density: The increased cell 111 housing space allows for the inclusion of more or larger cells 111, thereby increasing the energy density of the battery pack.

[0061] 3. Ease of maintenance: The external fixing method of the connector mounting plate 13 allows it to be directly removed for maintenance, simplifying the maintenance process.

[0062] 4. Improved production efficiency: The simplified design of the fixed structure 123a improves the convenience of manufacturing and is suitable for large-scale production.

[0063] 5. Improved installation strength: The multiple fixing holes improve the installation strength between the battery box shell 12 and the fixing frame 2.

[0064] 6. Prevent coolant leakage: The mounting holes should avoid the flow channels inside the liquid cooling plate 123 to prevent coolant leakage.

[0065] 7. Compact cell module 11 design: The compact arrangement of the cell module 11 and the direct connection between the cell 111 and the CCS component eliminates a large number of series copper busbars, saving space and increasing energy density.

[0066] 8. Convenient assembly operation: The end cover plate 121b of the lower cover 121 is designed to provide more operating space for the assembly of the cell module 11.

[0067] 9. Fire protection: The fireproof panel 14 provides additional safety protection to prevent the spread of flames in the event of battery thermal runaway.

[0068] 10. Improved sealing performance: The use of battery box sealing gasket 15 and connector mounting plate sealing gasket 16 improves the sealing performance of the battery box.

[0069] 11. Battery Information Management: The setup of BMS slave installation component 17 helps to collect and manage information about battery cells or modules.

[0070] The compact battery box 1 of this patent, through innovative design, optimizes the internal spatial structure of the battery box. By combining the fixing structure 123a with the liquid cooling plate 123, it saves side space and increases the storage space for the battery cells 111, thereby improving the energy density of the battery box. Simultaneously, improved maintenance convenience makes maintenance easier. The fireproof plate 14 provides additional safety for the battery box. Furthermore, the use of the battery box sealing gasket 15 and the BMS slave mounting assembly 17 further enhances the sealing performance and battery information management capabilities of the battery box. Overall, the compact battery box 1 design of this patent, through its unique structural optimization, solves the problem in existing technologies where power batteries struggle to balance high energy density and ease of maintenance. It provides a high-energy-density, easy-to-maintain power source solution for new energy vehicles, especially in the field of battery-swapping heavy-duty trucks.

[0071] Therefore, this invention effectively overcomes the various shortcomings of the prior art and has high industrial application value.

[0072] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A compact battery box (1), disposed within a mounting body, characterized in that, include: Battery cell module (11); The battery box housing (12) includes a lower cover (121) and an upper cover (122) adapted to the lower cover (121). A liquid cooling plate (123) is provided at the bottom of the lower cover (121). The upper cover (122) is fastened to the lower cover (121) and together they form a battery housing cavity for accommodating the cell module (11). A fixing structure (123a) connected to the mounting body is provided on the liquid cooling plate (123). An end cover plate (121b) is provided at one end of the lower cover (121). A mounting hole (121c) is provided on the end cover plate (121b). A connector mounting plate (13) is provided, which covers the mounting hole (121c) from the outside and is detachably fixed to the edge of the mounting hole (121c). The copper busbar of the connector mounting plate (13) passes through the mounting hole (121c) and is detachably connected to the battery cell module (11).

2. The compact battery box (1) according to claim 1, characterized in that: The fixing structure (123a) is a fixing hole opened on the liquid cooling plate (123).

3. The compact battery box (1) according to claim 2, characterized in that: The fixing holes include multiple holes, which are arranged on the edge of the liquid cooling plate (123) and avoid the flow channels inside the liquid cooling plate (123).

4. The compact battery box (1) according to claim 1, characterized in that: The battery module (11) includes multiple battery cells (111).

5. The compact battery box (1) according to claim 4, characterized in that: The battery cell module (11) includes a CCS assembly, and a plurality of the battery cells (111) are directly connected to the aluminum busbar on the CCS assembly.

6. The compact battery box (1) according to claim 1, characterized in that: The lower cover (121) includes a lower cover plate (121a) and two end cover plates (121b). One end of each of the two end cover plates (121b) is connected to both ends of the lower cover plate (121a). Correspondingly, the upper cover (122) includes an upper cover plate (122a) and two side cover plates (122b). One end of each of the two side cover plates (122b) is connected to both sides of the upper cover plate (122a). When the upper cover plate (122a) and the lower cover plate (121a) are fastened together, the other end of each end cover plate (121b) is connected to the corresponding ends of the upper cover plate (122a), and the two ends of each side cover plate (122b) are connected to the corresponding sides of the lower cover plate (121a).

7. The compact battery box (1) according to claim 1, characterized in that: The compact battery box (1) also includes a fireproof plate (14), which is disposed between the top cover (122) and the battery cell module (11).

8. The compact battery box (1) according to claim 1, characterized in that: The compact battery box (1) also includes a battery box sealing gasket (15) disposed between the upper cover (122) and the lower cover (121) to seal the gap between the upper cover (122) and the lower cover (121).

9. The compact battery box (1) according to claim 1, characterized in that: The compact battery box (1) also includes a BMS slave mounting assembly (17) which is mounted on the inside of the end cover plate (121b).

10. A battery pack, characterized in that, include: A fixed frame (2) is provided, wherein there is not less than one mounting cavity (21) inside the fixed frame (2), and the bottom of the mounting cavity (21) is provided with a mounting structure; The compact battery box (1) according to any one of claims 1 to 9 corresponds one-to-one with the mounting cavity (21), the compact battery box (1) is disposed in the mounting cavity (21) and fixed to the mounting structure by the fixing structure (123a) at the bottom.

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