Compact battery box and battery pack

Abstract

The utility model provides a compact battery box and a battery pack, the compact battery box is arranged in a mounting main body, and the compact battery box comprises a battery cell module, the battery box shell comprises a lower cover and an upper cover matched with the lower cover, a liquid cooling plate is arranged at the bottom of the lower cover, the upper cover is buckled on the lower cover, the upper cover and the lower cover jointly enclose a battery accommodating cavity for accommodating a battery cell module, a fixing structure connected with the mounting main body is arranged on the liquid cooling plate, and the fixing structure is connected with the mounting main body. An end cover plate is arranged at one end of the lower cover, and a mounting hole is formed in the end cover plate; the connector mounting plate covers the mounting hole from the outer side and is detachably fixed with the edge of the mounting hole, and a copper bar of the connector mounting plate penetrates through the mounting hole and is detachably connected with the battery cell module. The utility model solves the problem that the power battery in the prior art is difficult to give consideration to both high energy density and maintenance convenience.

Description

Technical Field

[0001] The utility model relates to the technical field of battery replacement, and in particular to a compact battery box and a battery pack. Background Art

[0002] With the continuous development of society and the growing popularity of environmental protection, new energy sources are becoming the preferred power source for transportation, especially with the increasing application of battery technology. Driven by this trend, electrification has become a key development direction for the trucking industry. As a key means of transportation, the electrification of trucks is driven not only by their heavy loads and long-distance hauling needs, but also by the challenges of existing charging technologies that are unable to meet the high-frequency and rapid charging requirements. Consequently, electric trucks with swappable batteries have seen rapid development in recent years and have become a focus of the industry.

[0003] With the upcoming implementation of the battery swap standard, electric trucks must pack as much power as possible into the space of a standard battery box if they want to achieve longer driving ranges. In theory, this means that the battery cell modules need to be arranged as compactly as possible within the specified space. There are two problems here: First, battery boxes in existing technologies are mostly installed through side fixing structures. When designing the battery box, reserved space needs to be set on both sides to set up the fixing structure. The reserved space greatly occupies the space inside the battery box cavity, limiting the number and size of battery cells that can be placed. Second, the more compact the battery cell modules in the battery pack, the greater its energy density. However, this design also increases maintenance costs, because the front-end connector mounting panels of existing standard battery boxes mostly use brackets to install inside the battery box. The battery cells are arranged too compactly, resulting in a very small working space. It is often necessary to disassemble the entire upper shell or set up a separate maintenance window to perform necessary maintenance work. Therefore, the industry urgently needs a battery pack structure design that can both improve energy density and simplify maintenance processes. Utility Model Content

[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 to solve the problem in the prior art that power batteries are difficult to achieve both high energy density and ease of maintenance.

[0005] In order to solve the above technical problems, the present invention provides a compact battery box, which is arranged in an installation body and includes:

[0006] Battery cell modules;

[0007] A battery box housing, the battery box housing comprising a lower cover and an upper cover adapted to the lower cover, a liquid cooling plate being provided at the bottom of the lower cover, the upper cover being buckled onto the lower cover and together enclosing a battery accommodating cavity for accommodating a battery cell module, the liquid cooling plate being provided with a fixing structure connected to the mounting body, an end cover being provided at one end of the lower cover, and a mounting hole being provided on the end cover;

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

[0009] As a more preferred solution, the fixing structure is a fixing hole opened on the liquid cooling plate. Using the fixing hole as the fixing structure, on the one hand, has a simple structure and is convenient for the installation of the battery box shell and the installation body; on the other hand, the fixing hole can be well processed on the liquid cooling plate, which improves the convenience of production and manufacturing.

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

[0011] As a more preferred solution, the battery cell module includes multiple battery cells, and the series and parallel connection of the multiple battery cells provide the required voltage and current for the battery cell module.

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

[0013] The hook at two return spring two ends is hooked in two that two of two secondary shoes upper ends hang the upper and lower ends of spring pin respectively hangs on the spring pins, form two return springs up and down, two camshafts are positioned in the middle of two return springs.

[0014] As a more preferred option, the compact battery box also includes a fireproof plate, located between the upper cover and the battery cell module. This plate protects the battery and prevents fire, preventing the spread of flames and heat in the event of thermal runaway. Fireproof plates typically have excellent heat resistance, flame retardancy, and electrical insulation properties, and can remain stable under extreme conditions, thus providing additional safety for the battery system.

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

[0016] As a more preferred solution, the compact battery box also includes a BMS slave installation component, which is installed on the inner side of the end cover plate and is responsible for collecting and managing information of battery cells or batteries, and transmitting this information to the main controller for further processing.

[0017] In order to solve the above problems, the present invention further provides a battery pack, comprising:

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

[0019] The compact battery box as described above corresponds one-to-one to the installation cavity, and the compact battery box is arranged in the installation cavity and fixed to the installation structure through 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 the compact battery box of the present invention is in use, the fixing structure provided on the liquid cooling plate is connected to the installation body. Compared with the traditional battery box fixed by the side, the fixing structure is directly provided on the liquid cooling plate, without occupying the space on the side of the battery box, and there is no need to reserve space on the side to set the fixing structure, which greatly increases the battery cell accommodating space in the battery box, and can accommodate more battery cells and larger-sized battery cells, thereby improving the energy density of the battery box; and because the fixing structure is provided 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, and the setting of the fixing structure does not increase the thickness of the battery box, and is The battery cell accommodating space in the battery box is not affected. Furthermore, when maintaining a compact battery box in which the battery cell modules are compactly arranged, since the internal space of the compact battery box has been completely filled with the battery cell modules, the maintenance work generally needs to be carried out by opening the upper cover and the lower cover, which undoubtedly increases the workload of maintenance. In the compact battery box of the utility model, 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 battery cell module, thereby completely removing the connector mounting plate, and then the connector mounting plate and the internal structure can be conveniently maintained.

[0021] The battery pack of the present invention adopts the above-mentioned compact battery box, which is disposed in the mounting cavity of the fixed frame and fixed by the fixing structure and the mounting structure. While the size of the mounting cavity remains unchanged, the cell accommodation space in the battery box is greatly increased, thereby improving the density of the entire battery pack. When new energy vehicles use the above-mentioned battery pack as a power source, they 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 fixed structure with the liquid cooling plate, saves the space on the side, greatly increases the cell accommodating space of the compact battery box, and improves the energy density; at the same time, the adaptive adjustment of the fixing method of the connector mounting plate improves the convenience of the compact battery box and battery pack of the present invention during maintenance, and solves the problem in the prior art that power batteries are difficult to take into account both high energy density and maintenance convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Shown is an exploded schematic diagram of the compact battery box of the present invention;

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

[0025] Figure 3 Shown is a schematic diagram of the fixing structure of the compact battery box of the utility model;

[0026] Figure 4 Shown is a schematic diagram of the assembly of the compact battery box of the utility model;

[0027] Figure 5 Shown is a schematic diagram of a disassembled connector mounting plate of a compact battery box of the present invention;

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

[0029] Component number description

[0030] 1 Compact battery box

[0031] 11 battery cell modules

[0032] 111 battery cells

[0033] 12 Battery box shell

[0034] 121 lower cover

[0035] 121a Lower cover

[0036] 121b end cover

[0037] 121c mounting holes

[0038] 122 Upper cover

[0039] 122a Upper cover

[0040] 122b Side cover

[0041] 123 Liquid Cold Plate

[0042] 123a Fixed structure

[0043] 13 Connector mounting plate

[0044] 14 Fireproof Board

[0045] 15 Battery box gasket

[0046] 16 Connector mounting plate gasket

[0047] 17 BMS slave installation components

[0048] 2 Fixed frame

[0049] 21 Install the inner cavity

[0050] 22 Fixing rod

[0051] 23 Fixed beam DETAILED DESCRIPTION

[0052] The following describes the implementation of the present invention through specific embodiments. People familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0053] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model. Therefore, they have no technical substantive significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed by the utility model without affecting the efficacy and purpose that can be achieved by the utility model. 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 terms used here are only for describing specific embodiments and are not intended to limit this application. Spatial-related terms, such as "upper", "lower", "left", "right", "below", "below", "lower", "above", "upper", etc., may be used in the text to facilitate the description of the relationship between one element or feature shown in the figure and another element or feature.

[0054] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," "holding," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0055] Furthermore, as used herein, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It should be further understood that the terms "comprise", "include" indicate the presence of the described features, operations, elements, components, items, kinds, and / or groups, but do not exclude the presence, occurrence, or addition of one or more other features, operations, elements, components, items, kinds, and / or groups. The terms "or" and "and / or" used herein are interpreted as inclusive, or mean any one or any combination. Thus, "A, B, or C" or "A, B, and / or C" means "any 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.

[0056] Glossary: ​​CCS component: Cells Contact System (CCS) is a key component of the power battery pack. It serves as an important bridge connecting the internal battery cells 111 with external electrical devices. Its integrated reliability is directly related to the safety of the battery pack. The CCS component integrates signal acquisition components, plastic structural parts, copper and aluminum bars, etc., and is connected into a whole through processes such as hot pressing or riveting to achieve high-voltage series and parallel connection of the battery cells 111, as well as battery temperature sampling and battery cell 111 voltage sampling functions. It also transmits information such as temperature and voltage to the BMS system through information sampling components and connectors, and is part of the BMS system;

[0057] BMS: A Battery Management System (BMS) is an electronic system responsible for monitoring and managing the operating status of rechargeable batteries. The core functions of a BMS include protecting batteries from exceeding their safe operating range, real-time monitoring of battery voltage, temperature, and current, generating and reporting relevant data, controlling the battery's operating environment, and ensuring battery balance. By performing these functions, a BMS ensures the safe, stable, and efficient operation of the battery system. It is primarily used in complex or large battery systems, such as electric vehicles, energy storage systems, and other high-performance battery applications.

[0058] like Figures 1 to 6 As shown, the present invention provides a compact battery box 1, which is arranged in a mounting body and includes:

[0059] Battery cell module 11;

[0060] 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 snapped onto the lower cover 121 and together encloses a battery accommodating cavity for accommodating the battery cell module 11. The liquid cooling plate 123 is provided with a fixing structure 123a connected to the mounting body. An end cover plate 121b is provided at one end of the lower cover 121, and a mounting hole 121c is defined in the end cover plate 121b.

[0061] 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 module 11.

[0062] In order to better introduce the compact battery box 1 of the present invention, it is now explained in combination with the following specific applications: When the compact battery box 1 of the present invention is in use, the fixing structure 123a provided on the liquid cooling plate 123 is connected to the installation body. Compared with the traditional battery box fixed by the side, the fixing structure 123a is directly provided on the liquid cooling plate 123, without occupying the space on the side of the battery box, and there is no need to reserve space on the side to set the fixing structure 123a, which greatly increases the accommodating space of the battery cells 111 in the battery box, and can accommodate more battery cells 111 and larger-sized battery cells 111, thereby improving the energy density of the battery box; and because the fixing structure 123a is provided on the liquid cooling plate 123, it is equivalent to connecting the installation space of the liquid cooling plate 123 with the fixing structure 123. The required installation space of the structure 123a is stacked together, and the setting of the fixed structure 123a does not increase the thickness of the battery box, and has no effect on the accommodating space of the battery cells 111 in the battery box; further, when the compact battery box 1 with the compactly arranged battery cell modules 11 is maintained, since the internal space of the compact battery box 1 has been completely filled with 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. Figure 5 As shown, after removing the connector mounting plate 13, the copper busbar can be easily separated from the battery module 11, thereby completely removing the connector mounting plate 13, and then conveniently maintaining the connector mounting plate 13 and the internal structure.

[0063] In some embodiments of the present invention, Figure 1As shown, 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 seat. A plurality of bolts are passed through the corresponding limiting holes and through holes from the outside to detachably fix the connector mounting seat to the outer side of the end cover plate 121b and cover the mounting hole 121c; the copper busbar can also be detachably connected to the battery module 11 by a similar bolt fixing method as mentioned above; more specifically, after removing the bolts between the connector mounting seat and the end cover plate 121b, the connector mounting seat is folded upward at a certain angle to expose the fixing bolts between the copper busbar and the battery module 11. After removal, the connector mounting seat can be removed.

[0064] In some embodiments of the present invention, Figure 3 As shown, the fixing structure 123a is a fixing hole opened on the liquid cooling plate 123. Using the fixing hole as the fixing structure 123a, on the one hand, has a simple structure and is convenient for the installation of the battery box shell 12 and the installation 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.

[0065] In some embodiments of the present invention, Figure 3 As shown, the fixing holes include multiple ones, and the multiple fixing holes are arranged on the edge of the liquid cooling plate 123 and avoid the flow channel in the liquid cooling plate 123; the multiple fixing holes improve the installation strength between the battery box shell 12 and the installation body, and avoiding the flow channel in the liquid cooling plate 123 can prevent the leakage of the coolant in the liquid cooling plate 123; more specifically, in this embodiment, there are eight fixing holes in total, and the eight fixing holes are arranged on both sides of the liquid cooling plate 123 to facilitate fixation.

[0066] In some embodiments of the present invention, Figure 1 as well as Figure 2As shown, the battery module 11 includes a plurality of battery cells 111, and the series and parallel connection of the plurality of battery cells 111 provides the required voltage and current for the battery module 11; more specifically, in this embodiment, the battery module 11 is a large module composed of 48 battery cells 111, and the battery cells 111 are divided into three rows and arranged in the battery accommodating cavity. All battery cells 111 are bonded by buffer insulation and the electrical connections of the battery cells 111 are all connected through the aluminum bar in the CCS assembly above the module, eliminating the need for series copper bars between the modules; in addition, by selecting battery cells 111 of appropriate width, the battery box can be filled as much as possible. The space inside the battery pack is released to the battery module. It is calculated that 94.7% of the space inside the battery pack is occupied by the battery module. The installation point of the battery box assembly is integrated at the bottom of the battery box, which makes full use of the space in the height direction of the battery box assembly and greatly improves the energy density of the battery box. The power of the compact battery box 1 involved in this embodiment can reach 50.077 degrees. Furthermore, a mounting beam is provided on the lower cover 121a, and the 48 battery cells 111 are connected to the mounting beam by long bolts. At the same time, the bottom of the battery cell 111 is bonded to the middle mounting surface of the lower cover 121a by a heat-conducting structural adhesive.

[0067] In some embodiments of the present invention, the battery cell module 11 includes a CCS assembly, and the multiple battery cells 111 are directly connected to the aluminum busbars on the CCS assembly, eliminating a large number of series copper busbars, further saving space and improving energy density.

[0068] In some embodiments of the present invention, Figure 1 as well as Figure 4 As shown, the lower cover 121 includes a lower cover plate 121a and two end cover plates 121b, one end of the two end cover plates 121b is respectively connected to the two ends of the lower cover plate 121a, and correspondingly, the upper cover 122 includes an upper cover plate 122a and two side cover plates 122b, one end of the two side cover plates 122b is respectively connected to the two sides of the upper cover plate 122a; when the upper cover plate 122a is buckled with the lower cover plate 121a, the other end of the end cover plate 121b is respectively connected to the two ends corresponding to the upper cover plate 122a, and the two ends of the side cover plate 122b are respectively connected to the lower cover plate 1 21a are connected on both sides corresponding to each other; in this way, before the upper cover 122a and the lower cover 121a are fastened together, the two side surfaces of the lower cover 121 are not provided with side covers 122b for shielding, and when the battery module 11 is placed on the lower cover 121, the operating space is larger and the assembly is more convenient; at the same time, due to the existence of the end cover 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 121b, and the operating space on the side of the lower cover 121 further facilitates the tedious line connection and connection fixation during the assembly process of the connector mounting plate 13.

[0069] In some embodiments of the present invention, a connection structure is provided on the liquid cooling plate 123 , and the liquid cooling plate 123 is connected to the lower cover plate 121 a through the connection structure.

[0070] In some embodiments of the present invention, Figure 1 As shown, the compact battery box 1 also includes a fireproof board 14, which is arranged between the upper cover 122 and the battery cell module 11, and is used for battery protection and fire prevention to prevent the spread of flames and the diffusion of heat when thermal runaway occurs. The fireproof board 14 usually has excellent heat resistance, flame retardancy and electrical insulation, and can remain stable under extreme conditions, thereby providing additional safety for the battery system; further, in this embodiment, the fireproof board 14 is integrally bonded to the bottom of the upper cover 122a by silicone foam double-sided tape to form a battery box upper cover 122 subassembly; more specifically, the main functions of the fireproof board 14 also include: Heat insulation: The fireproof board 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. ; Fire prevention: After the battery has thermal runaway, the fireproof board 14 can effectively isolate the flame and control the direction of the fire by relying on its excellent flame retardant properties; Structural strength: The design of some fireproof boards 14 can also increase the structural strength of the battery cover. At the same time, its cavity and ribs form an air guide channel, which helps in the directional discharge of thermal runaway gas; High temperature resistance: The fireproof board 14 can usually remain stable in a high temperature environment, and the long-term working temperature can reach 500℃ to 800℃, with good high temperature insulation performance; Electrical insulation: Prevent short circuits and arcs inside the battery pack.

[0071] In some embodiments of the present invention, Figure 1 As shown, the compact battery box 1 also includes a battery box sealing gasket 15 arranged between the upper cover 122 and the lower cover 121 to seal the gap between the upper cover 122 and the lower cover 121, improve the sealing performance, and prevent external impurities from entering the battery box shell 12, causing interference to the internal electrical components and affecting the service life.

[0072] In some embodiments of the present invention, Figure 1 As shown, 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 outer side of the end cover plate 121b by its own double-sided adhesive;

[0073] In some embodiments of the present invention, Figure 1As shown, the compact battery box 1 also includes a BMS slave installation component 17, which is installed on the inner side of the end cover plate 121b and is responsible for collecting and managing information of battery cells or batteries and transmitting this information to the main controller for further processing.

[0074] In order to solve the above problems, Figure 6 As shown, the present invention also provides a battery pack, comprising:

[0075] A fixed frame 2, wherein the fixed frame 2 is provided with at least one mounting cavity 21, and a mounting structure is provided at the bottom of the mounting cavity 21;

[0076] The compact battery box 1 described above corresponds one-to-one with the installation cavity 21 . The compact battery box 1 is disposed in the installation cavity 21 and fixed to the installation structure via a fixing structure 123 a at the bottom.

[0077] In order to better introduce the battery pack of the present invention, it is now explained in combination with the following specific applications: the battery pack of the present invention adopts the above-mentioned compact battery box 1, and the compact battery box 1 is set in the installation cavity 21 of the fixed frame 2, and is fixed by the fixing structure 123a and the installation structure; under the premise that the size of the installation cavity 21 remains unchanged, the storage space of the battery cells 111 in the battery box is greatly increased, and the density of the entire battery pack is improved. When new energy vehicles use the above-mentioned 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, saves side space, greatly increases the storage space of the battery cells 111 of the compact battery box 1, and improves 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, and solves the problem that power batteries in the prior art are difficult to take into account both high energy density and maintenance convenience.

[0078] In some embodiments of the present invention, Figure 6 As shown, there are eight installation cavities 21 on the fixed frame 2. The eight installation cavities 21 are divided into two rows and arranged vertically in the fixed frame 2. There are four layers in total, and each layer includes two. Similarly, the compact battery box 1 also includes eight. Considering that the power of a single compact battery box 1 can reach 50.077 degrees, the power of the entire battery pack can exceed 400 degrees.

[0079] In some embodiments of the present invention, Figure 6As shown, the fixed frame 2 is a rectangular frame structure composed of multiple fixing rods 22, and the mounting structure is a locking hole arranged on the fixed frame 2 corresponding to the fixing holes one by one; in this embodiment, a fixing 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 at a position on the fixing beam 23 corresponding to the fixing hole.

[0080] In summary, the compact battery box and battery pack of the present invention have the following advantages:

[0081] 1. Optimizing space utilization: By directly arranging the fixing structure 123a on the liquid cooling plate 123, the side space of the battery box is saved and the space for accommodating the battery cells 111 is increased.

[0082] 2. Improve energy density: The increased space for accommodating the battery cells 111 allows for accommodating more or larger battery cells 111, thereby improving the energy density of the battery box.

[0083] 3. Maintenance convenience: The outer fixing method of the connector mounting plate 13 allows it to be directly removed during maintenance, simplifying the maintenance process.

[0084] 4. Improved production efficiency: The simplified design of the fixed structure 123a improves the convenience of production and manufacturing and is suitable for large-scale production.

[0085] 5. Improved installation strength: The provision of multiple fixing holes improves the installation strength between the battery box housing 12 and the fixing frame 2.

[0086] 6. Avoid coolant leakage: The fixing holes should avoid the flow channel in the liquid cooling plate 123 to avoid coolant leakage.

[0087] 7. Compact cell module 11 design: The compact arrangement of the cell module 11 and the direct connection of the cell 111 to the CCS assembly eliminate a large number of series copper bars, saving space and improving energy density.

[0088] 8. Convenient assembly operation: The design of the end cover plate 121 b of the lower cover 121 provides a larger operating space for the assembly of the battery module 11 .

[0089] 9. Fire protection: The setting of the fireproof plate 14 provides additional safety protection to prevent the spread of flames when the battery thermal runaway occurs.

[0090] 10. Improved sealing performance: The use of the battery box sealing gasket 15 and the connector mounting plate sealing gasket 16 improves the sealing performance of the battery box.

[0091] 11. Battery Information Management: The configuration of the BMS slave installation component 17 helps to collect and manage information of battery cells or modules.

[0092] The compact battery box 1 of this patent optimizes the internal spatial structure of the battery box through innovative design, combines the fixed structure 123a with the liquid cooling plate 123, saves side space, and increases the space for accommodating the battery cells 111, thereby improving the energy density of the battery box. At the same time, the improvement in maintenance convenience makes the battery box more convenient to maintain. The setting of the fireproof plate 14 provides additional safety for the battery box. In addition, the use of the battery box sealing gasket 15 and the BMS slave mounting assembly 17 further improves the sealing performance and battery information management capabilities of the battery box. Overall, the design of the compact battery box 1 of this patent, through its unique structural optimization, solves the problem in the prior art that power batteries are difficult to balance high energy density and maintenance convenience, and provides a high-energy-density, easy-to-maintain power source solution for new energy vehicles, especially in the field of battery-swap heavy trucks.

[0093] Therefore, the utility model effectively overcomes various shortcomings of the prior art and has high industrial utilization value.

[0094] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the present invention. Anyone skilled in the art may 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 persons skilled in the art without departing from the spirit and technical principles disclosed herein are intended to be covered by the claims of the present invention.

Claims

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

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

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

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

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

6. The compact battery box (1) according to claim 1, characterized in that: The lower cover (121) comprises a lower cover plate (121a) and two end cover plates (121b), one end of the two end cover plates (121b) are respectively connected to the two ends of the lower cover plate (121a); ​​correspondingly, the upper cover (122) comprises an upper cover plate (122a) and two side cover plates (122b), one end of the two side cover plates (122b) are respectively connected to the two sides of the upper cover plate (122a); when the upper cover plate (122a) and the lower cover plate (121a) are buckled together, the other end of the end cover plate (121b) is respectively connected to the two corresponding ends of the upper cover plate (122a), and the two ends of the side cover plate (122b) are respectively connected to the two 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) further includes a fireproof plate (14), and the fireproof plate (14) is arranged between the upper cover (122) and the battery core module (11).

8. The compact battery box (1) according to claim 1, characterized in that: The compact battery box (1) further comprises a battery box sealing gasket (15) arranged 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) further comprises a BMS slave installation assembly (17), wherein the BMS slave installation assembly (17) is installed on the inner side of the end cover plate (121b).

10. A battery pack, characterized in that: include: A fixed frame (2), wherein the fixed frame (2) is provided with at least one mounting inner cavity (21), and a mounting structure is provided at the bottom of the mounting inner cavity (21); A compact battery box (1) as described in any one of claims 1 to 9, corresponding one-to-one to the mounting inner cavity (21), wherein the compact battery box (1) is arranged in the mounting inner cavity (21) and is fixed to the mounting structure via a fixing structure (123a) at the bottom.

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