Battery Assembly and Battery Pack

Abstract

This application relates to the technical field of battery manufacturing, and in particular to a battery component and a battery pack. The battery component includes a soft-pack battery unit and a fixing component. The soft-pack battery unit includes aluminum fins, single-cell soft-pack batteries, and foams. Two aluminum fins are joined together to form a receiving cavity, and a number of single-cell soft-pack batteries are disposed in the receiving cavity. The single-cell soft-pack batteries are divided into a number of battery groups, and the single-cell soft-pack batteries in the battery group are connected in series with each other. Foams are provided between adjacent two battery groups. The fixing component includes fixing rods and nuts. A number of soft-pack battery units are arranged adjacent to each other to form a soft-pack battery unit stack. A number of fixing rods penetrate through the soft-pack battery unit stack, and the nuts are threadedly assembled with the fixing rods, so that the position of each soft-pack battery unit on the fixing rods is fixed. It solves the problem that the soft-pack battery grouping scheme adopted by the traditional battery component has low integration, requires a large number of electrical connection components and structural components, resulting in low grouping efficiency and high cost.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing, and in particular, to a battery assembly and a battery pack. Background Art

[0002] Energy conservation and emission reduction are the keys to the sustainable development of the automotive industry. Electric vehicles have become an important part of the sustainable development of the automotive industry due to their advantages of energy conservation and environmental protection. For electric vehicles, the power battery technology is an important factor related to their development.

[0003] As a packaging method of power batteries, single-cell soft-pack batteries have many advantages. Therefore, the battery assemblies of general electric vehicles usually adopt the grouping scheme of single-cell soft-pack batteries. The soft-pack battery grouping scheme adopted by traditional battery assemblies has a low integration level, requires a large number of electrical connectors and structural parts, and has a low grouping efficiency and high cost. Summary of the Invention

[0004] The battery assembly and battery pack provided by the present application aim to solve the problems that the soft-pack battery grouping scheme adopted by traditional battery assemblies has a low integration level, requires a large number of electrical connectors and structural parts, resulting in low grouping efficiency and high cost.

[0005] To solve the above technical problems, the present application proposes a battery assembly, which includes: a soft-pack battery unit and a fixing component;

[0006] The soft-pack battery unit includes aluminum fins, single-cell soft-pack batteries, and foam. The two aluminum fins are joined together to form a receiving cavity. A plurality of the single-cell soft-pack batteries are arranged in the receiving cavity, and the plurality of single-cell soft-pack batteries are divided into several battery groups. The single-cell soft-pack batteries in the battery group are connected in series with each other;

[0007] Foam is provided between adjacent two battery groups, and the foam is used to absorb the expansion of the single-cell soft-pack batteries and for insulation and heat insulation;

[0008] The fixing component includes fixing rods and nuts. A plurality of the soft-pack battery units are arranged adjacent to each other to form a soft-pack battery unit stack. A plurality of the fixing rods penetrate through the soft-pack battery unit stack, and the nuts are threadedly assembled with the fixing rods so that the soft-pack battery units are fixed on the fixing rods.

[0009] Further, the soft-pack battery unit further includes insulating parts, and the insulating parts are fixedly installed at both ends of the aluminum fins.

[0010] Further, a plurality of through holes are provided on the aluminum fins, and the through holes are evenly distributed at the ends and the middle of the aluminum fins, and the fixing rods penetrate through the through holes.

[0011] Further, a heat insulation plate is provided between two adjacent soft-pack battery cells, and the fixing rod penetrates through the heat insulation plate.

[0012] Further, the fixing assembly further includes a baffle, the baffle surrounds the periphery of the soft-pack battery cell stack, and the fixing rod is mounted based on the baffle.

[0013] Further, the battery assembly further includes a reinforcing beam, the reinforcing beam is disposed in the middle of the soft-pack battery cell stack, the reinforcing beam divides the soft-pack battery cell stack into two parts, and the fixing rod penetrates through the reinforcing beam.

[0014] Further, the insulating member is provided with a groove, the baffle is provided with a rib, the shape of the groove matches the shape of the rib, and the rib is embedded in the groove.

[0015] Further, the battery assembly further includes a cover plate, the cover plate covers the top of the soft-pack battery cell stack, and the cover plate is fixedly connected to the baffle, and the cover plate is used to enhance the structural strength of the battery assembly.

[0016] Further, the battery assembly further includes a protective cover, the protective cover covers the surface of the cover plate, the outer layer of the protective cover is an impact-resistant layer, and the inner layer of the protective cover is a high-temperature-resistant layer.

[0017] Further, the battery assembly further includes a box body and a liquid cooling plate, the liquid cooling plate is laid in the box body, the battery cell stack is placed on the liquid cooling plate, and the baffle is fixedly installed with the box body.

[0018] Further, the insulating member is provided with a fixing hole, the fixing hole penetrates through the insulating member, and the fixing rod penetrates through the fixing hole.

[0019] Further, double-sided adhesive tapes are provided on both sides of the heat insulation plate, so that the heat insulation plate can be fixed to the aluminum fins in the soft-pack battery cell.

[0020] To achieve the object of the present invention, on the other hand, the present invention provides a battery pack, which includes the battery assembly according to any one of the above.

[0021] The beneficial effects of the present application are as follows: In the battery assembly provided by the present application, the battery assembly includes a soft-pack battery unit and a fixing component. The soft-pack battery unit includes aluminum fins, single-cell soft-pack batteries, and foam. Two aluminum fins are joined together to form a receiving cavity. A plurality of single-cell soft-pack batteries are disposed in the receiving cavity, and the plurality of single-cell soft-pack batteries are divided into a plurality of battery groups. The single-cell soft-pack batteries in the battery group are connected in series with each other. Foam is provided between adjacent two battery groups. The foam is used to absorb the expansion of the single-cell soft-pack batteries and for insulation and heat insulation. The fixing component includes fixing rods and nuts. A plurality of soft-pack battery units are arranged adjacent to each other to form a soft-pack battery unit stack. A plurality of fixing rods penetrate through the soft-pack battery unit stack, and the nuts are threadedly assembled with the fixing rods, so that the position of each soft-pack battery unit on the fixing rod is fixed. Through the highly integrated grouping scheme, the number of modules is reduced, the overall grouping efficiency of the battery assembly can be improved, a lot of electrical connection components and structural components are omitted, and the cost is reduced. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts. Among them:

[0023] Figure 1 is an exploded view of the battery assembly according to an embodiment of the present invention;

[0024] Figure 2 is an exploded view of the battery assembly according to an embodiment of the present invention after removing the box body and the liquid cooling plate part;

[0025] Figure 3 is a three-dimensional structural schematic diagram of a soft-pack battery unit stack and a baffle according to an embodiment of the present invention;

[0026] Figure 4 is an exploded view of a soft-pack battery unit stack according to an embodiment of the present invention;

[0027] Figure 5 is a partial enlarged view of a soft-pack battery unit stack according to an embodiment of the present invention;

[0028] Figure 6 is an exploded view of a soft-pack battery unit according to an embodiment of the present invention;

[0029] Figure 7 is a three-dimensional structural schematic diagram of a partial baffle according to an embodiment of the present invention;

[0030] Figure 8 is a three-dimensional structural schematic diagram of a reinforcing beam and a fixing component according to an embodiment of the present invention.

[0031] Explanation of the reference numerals: 100, soft-pack battery cell; 110, aluminum fin; 111, through hole; 120, single soft-pack battery; 130, foam; 210, fixing rod; 220, nut; 300, insulating member; 310, fixing hole; 320, groove; 400, heat insulation board; 500, baffle; 501, end plate; 502, side plate; 510, convex strip; 520, first mounting hole; 600, soft-pack battery cell stack; 610, reinforcing beam; 611, second mounting hole; 620, cover plate; 621, opening; 630, protective cover; 631, cut-off; 700, box body; 710, liquid cooling plate. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0033] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "a", "an", "above", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of features, integers, steps, operations, elements, modules, modules and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, modules, modules, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any module and all combinations of one or more associated listed items.

[0034] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in common dictionaries should be understood to have meanings consistent with the meanings in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0035] like Figure 1 and Figure 6As shown in the figure, the present application provides a battery assembly, which includes a soft-pack battery unit 100 and a fixing assembly. The soft-pack battery unit 100 includes aluminum fins 110, monomer soft-pack batteries 120, and foam 130. Two aluminum fins 110 are joined together to form a receiving cavity. A number of monomer soft-pack batteries 120 are disposed in the receiving cavity, and the number of monomer soft-pack batteries 120 is divided into a number of battery groups. The monomer soft-pack batteries 120 in the battery group are connected in series with each other. Foam 130 is provided between adjacent two battery groups. The foam 130 is used to absorb the expansion of the monomer soft-pack batteries 120 and for insulation and heat insulation. The fixing assembly includes fixing rods 210 and nuts 220. A number of soft-pack battery units 100 are arranged adjacent to each other to form a soft-pack battery unit stack 600. A number of fixing rods 210 penetrate through the soft-pack battery unit stack 600, and the nuts 220 are threadedly assembled with the fixing rods 210, so that the soft-pack battery unit stack 600 and the fixing rods 210 form a stable overall structure.

[0036] In a specific embodiment, the aluminum fins 110 are made of aluminum metal with good thermal conductivity, which can timely dissipate the heat generated when the monomer soft-pack batteries 120 work, and avoid the overheating of the monomer soft-pack batteries 120 affecting their performance and service life. The aluminum fins 110 are U-shaped, and the openings of the two aluminum fins 110 face each other and are symmetrically joined together, so that a receiving cavity is formed between the two aluminum fins 110. The receiving cavity provides an installation space for the monomer soft-pack batteries 120.

[0037] The monomer soft-pack battery 120 is a battery encapsulated with an aluminum plastic film. In this embodiment, one soft-pack battery unit 100 includes two battery groups, each battery group includes two monomer soft-pack batteries 120, and the two monomer soft-pack batteries 120 in each battery group are connected in series with each other. By connecting in series, the output voltage of the battery group can be increased to meet the voltage requirements of different devices.

[0038] The foam 130 is a material with elasticity and insulation performance. At the same time, a material with high temperature resistance is added to the foam 130. The shape of the foam 130 matches that of the monomer soft-pack battery 120. In this embodiment, the foam 130 is placed between adjacent two battery groups. On the one hand, since the monomer soft-pack batteries 120 will expand to a certain extent during the charging and discharging process, the foam 130 can effectively absorb this expansion and prevent damage caused by mutual extrusion between the battery groups. On the other hand, the insulation and heat insulation performance of the foam 130 can avoid electrical short circuits between the battery groups and reduce the heat transfer between the battery groups at the same time, ensuring the stability of the battery group during operation.

[0039] In this embodiment, the aluminum fins 110 and the monomer soft-pack batteries 120, and the monomer soft-pack batteries 120 and the foam 130 are all pasted with double-sided tape to enhance the structural stability of the soft-pack battery unit 100.

[0040] The fixing component includes a fixing rod 210 and a nut 220. The fixing rod 210 is a rigid component in the shape of a long cylinder. A plurality of pouch cell units 100 are arranged in a matrix to form a pouch cell unit stack 600. Two through holes 111 are provided at the middle and both ends of the aluminum fin 110 at upper and lower intervals. The through holes 111 penetrate through the aluminum fin 110. The fixing rod 210 matches the through holes 111. The fixing rod 210 penetrates through the through holes 111 in the pouch cell unit stack 600, and the nut 220 is threadedly assembled with both ends of the fixing rod 210. When the nut 220 is tightened on the fixing rod 210, each pouch cell unit 100 can be fixed on the fixing rod 210, ensuring the stability of the entire battery component structure.

[0041] In summary, the internal structural design of the pouch cell unit 100 enables the battery pack to work efficiently and stably. Through the absorption and insulation and heat insulation effects of the foam 130 on the expansion of the single pouch cell 120, the safety and reliability of the pouch cell unit 100 are improved. By arranging a number of pouch cell units 100 into a pouch cell unit stack 600 and then fixing them through the fixing rod 210 and the nut 220, a highly integrated grouping scheme is formed, reducing the number of modules, improving the overall grouping efficiency of the battery component, omitting a lot of electrical connection parts and structural parts, and reducing the cost.

[0042] As Figure 4 and Figure 5 shown, the pouch cell unit 100 further includes an insulating member 300, and the insulating member 300 is fixedly installed at both ends of the aluminum fin 110.

[0043] In a specific embodiment, the insulating member 300 is a component made of insulating material. In this battery assembly, the insulating member 300 is fixedly installed at both ends of the aluminum fin 110, so that the accommodation cavity formed between the two aluminum fins 110 is further blocked, ensuring the electrical safety of the entire soft-pack battery unit 100. The insulating member 300 can be made of common insulating materials such as plastics, and its shape and size are designed and customized according to the end shape of the aluminum fin 110 and the actual installation requirements. During installation, through specific fixing methods, such as heat melt post fixing, glue pasting, snap connection, etc., the insulating member 300 is firmly fixed at both ends of the aluminum fin 110 to ensure that the insulating member 300 can stably play its insulating role throughout the service life of the battery assembly. The insulating member 300 and the aluminum fin 110 form the basic framework of the soft-pack battery unit 100, and other components of the soft-pack battery unit are installed based on this basic framework. Fixing holes 310 are provided at both the upper and lower ends of the insulating member 300. The fixing holes 310 penetrate through the insulating member 300, and the fixing rods 210 penetrate through the fixing holes 310. The mutual cooperation and positioning between the soft-pack battery units 100 are completed through the cooperation of the fixing holes 310 on the insulating member 300 and the fixing rods 210, which can further enhance the overall structural stability of the soft-pack battery unit stack 600.

[0044] As Figure 4 shown, a heat insulation plate 400 is provided between two adjacent soft-pack battery units 100, and the fixing rod 210 penetrates through the heat insulation plate 400.

[0045] In a specific embodiment, in the soft-pack battery unit stack 600, a heat insulation plate 400 is provided between two adjacent soft-pack battery units 100. The shape of the heat insulation plate 400 matches the shape of the aluminum fin 110. The heat insulation plate 400 is a plate with good heat insulation performance. Since the soft-pack battery unit 100 generates heat during operation, if too much heat is transferred between adjacent soft-pack battery units 100, it may cause the temperature of the battery pack to be too high, affecting the performance and lifespan of the battery. The function of the heat insulation plate 400 is to prevent heat transfer between adjacent soft-pack battery units 100 and ensure that each soft-pack battery unit 100 can operate within a suitable temperature range. The heat insulation plate 400 is usually made of materials with excellent heat insulation performance such as ceramic fiber and aerogel. The fixing rod 210 penetrates through the heat insulation plate 400, fixing the heat insulation plate 400 and the soft-pack battery unit 100 together on the fixing rod 210 to ensure the stable position of the heat insulation plate 400 during use. Double-sided adhesive tapes are provided on both sides of the heat insulation plate 400, enabling the heat insulation plate 400 to be tightly adhered to the two adjacent aluminum fins 110 to improve the heat insulation efficiency.

[0046] In summary, the provision of the heat insulation plate 400 significantly improves the thermal management performance of the battery assembly. It effectively reduces the heat transfer between adjacent pouch battery cells 100, reduces the risk of performance degradation and shortened lifespan of the pouch battery cells 100 due to overheating, and improves the overall performance and reliability of the battery assembly by maintaining the temperature stability of each pouch battery cell 100.

[0047] As Figure 2 shown, the fixing assembly further includes a baffle 500. The baffle 500 surrounds the pouch battery cell stack 600, and the fixing rod 210 is installed based on the baffle 500.

[0048] In a specific embodiment, the baffle 500 surrounds the four sides of the pouch battery cell stack 600. The main function of the baffle 500 is to protect and position the pouch battery cell stack 600. It can prevent the pouch battery cell stack 600 from being collided and squeezed by external objects, protecting the pouch battery cells 100 from being damaged. At the same time, the fixing rod 210 passes through the baffle 500, so that the pouch battery cell stack 600 and the baffle 500 form an integral structure to stably fix the pouch battery cell stack 600 within the space surrounded by the baffle 500. The baffle 500 can be made of a metal material, such as aluminum alloy, which has a certain strength and hardness and can effectively protect the pouch battery cell stack 600; it can also be made of a high-strength engineering plastic, which can reduce the weight of the entire battery assembly while ensuring a certain strength. The shape and size of the baffle 500 are customized according to the size and shape of the pouch battery cell stack 600 to ensure that it can closely surround the pouch battery cell stack 600. By surrounding the baffle 500 around the pouch battery cell stack 600, the expansion of the pouch battery cells 100 after long cycles can be effectively restricted, improving the cycling performance of the battery assembly.

[0049] In summary, the provision of the baffle 500 improves the protection performance and structural stability of the battery assembly. The baffle 500 provides a physical protection barrier for the pouch battery cell stack 600, reducing the risk of damage to the pouch battery cells 100 caused by external factors and extending the service life of the battery assembly. At the same time, as the installation base of the fixing rod 210, the baffle 500 makes the installation of the fixing assembly more firm, further enhancing the integrity of the pouch battery cell stack 600.

[0050] As Figure 2 and Figure 8 shown, the battery assembly further includes a reinforcing beam 610. The reinforcing beam 610 is provided in the middle of the pouch battery cell stack 600. The reinforcing beam 610 divides the pouch battery cell stack 600 into two parts, and the fixing rod 210 passes through the reinforcing beam 610.

[0051] In a specific embodiment, the reinforcing beam 610 is a rectangular plate, and the reinforcing beam 610 is disposed in the middle of the pouch cell stack 600. It divides the pouch cell stack 600 into two parts. In another specific embodiment, the reinforcing beam 610 can be provided as a plurality of parallel and spaced-apart ones. The plurality of reinforcing beams 610 evenly divide the pouch cell stack 600 into several portions. The main function of the reinforcing beam 610 is to enhance the overall structural strength of the pouch cell stack 600. When the pouch cell stack 600 is subjected to an external force, especially a large bending force or pressure, it is prone to deformation. The presence of the reinforcing beam 610 can effectively resist this deformation and disperse and bear the external force through its own high strength. The reinforcing beam 610 is usually made of a metal material, such as steel or high-strength aluminum alloy, and has good bending and compressive resistance. The fixing rod 210 penetrates through the reinforcing beam 610 to fix the position of the reinforcing beam 610.

[0052] In summary, the setting of the reinforcing beam 610 significantly improves the structural strength and stability of the battery assembly. The reinforcing beam 610 effectively enhances the ability of the pouch cell stack 600 to resist deformation under external forces. By dividing the pouch cell stack 600 into two parts, the reinforcing beam 610 enables the entire battery assembly to form a more stable structural system, improving the reliability of the battery assembly under complex working conditions.

[0053] As Figure 5 and Figure 7 shown, the insulating member 300 is provided with a groove 320, and the baffle 500 is provided with a rib 510. The shape of the groove 320 matches the shape of the rib 510, and the rib 510 is embedded in the groove 320.

[0054] In a specific embodiment, a strip-shaped groove 320 is provided at the top of the insulating member 300, and a rib 510 matching the groove 320 is provided at the side of the baffle 500 corresponding to the insulating member 300. The function of the groove 320 is to cooperate with the rib 510 to achieve a tight connection between the insulating member 300 and the baffle 500. This connection method can not only ensure the position stability of the insulating member 300 and the baffle 500 after installation, but also enhance the bonding strength between the two. When the rib 510 is embedded in the groove 320, a connection method similar to a mortise and tenon structure is formed. This connection method does not require additional connecting parts and can achieve stable connection only through the shape matching of the components themselves, which not only simplifies the installation process but also improves the reliability of the connection.

[0055] In summary, the insulating part 300 and the baffle 500 are connected through the cooperation of the groove 320 and the rib 510, which improves the connection stability between the insulating part 300 and the baffle 500, reduces the risk of separation between the two due to external forces such as vibration and impact, and further ensures the structural stability of the entire battery assembly. Secondly, no additional connecting parts are required, which reduces the production cost and installation difficulty and improves the production efficiency.

[0056] As Figure 3 shown, the baffle 500 includes end plates 501 and side plates 502. Both the end plates 501 and the side plates 502 are rectangular. The two end plates 501 are arranged in parallel at intervals on both sides of the soft-pack battery unit stack 600, and the two side plates 502 are arranged in parallel at intervals on both sides of the soft-pack battery unit stack 600. The end plates 501 and the side plates 502 are welded to each other to form a rectangular frame matching the soft-pack battery unit stack 600. During the assembly process of the soft-pack battery unit stack 600 and the baffle 500, the side plates 502 need to be coated with glue so that the soft-pack battery unit stack 600 and the side plates 502 are bonded to form a whole, and then the side plates 502 and the cover plate 620 are welded and fixed to increase the overall structural strength of the battery assembly.

[0057] As Figure 2 shown, the battery assembly further includes a cover plate 620. The cover plate 620 covers the top of the soft-pack battery unit stack 600, and the cover plate 620 is fixedly connected to the baffle 500. The cover plate 620 is used to strengthen the structural strength of the battery assembly.

[0058] In a specific embodiment, the cover plate 620 is a rectangular plate, and the shape of the cover plate 620 matches the shape of the soft-pack battery unit stack 600. The cover plate 620 covers the top of the soft-pack battery unit stack 600 and is fixed to the baffle 500 by welding. The setting of the cover plate 620 improves the structural strength and protection performance of the battery assembly, effectively protecting the soft-pack battery unit stack 600 from being impacted and damaged by external objects. By fixedly welding the cover plate 620 and the baffle 500, the integrity and compressive resistance of the entire battery assembly are enhanced. Openings 621 are provided at the positions of the cover plate 620 corresponding to each soft-pack battery unit 100. The openings 621 are in a long strip shape, and the openings 621 can serve as exhaust channels when the soft-pack battery unit 100 has a thermal runaway.

[0059] As Figure 2 shown, the battery assembly further includes a protective cover 630. The protective cover 630 covers the surface of the cover plate 620. The outer layer of the protective cover 630 is an impact-resistant layer, and the inner layer of the protective cover 630 is a high-temperature-resistant layer.

[0060] In a specific embodiment, the protective cover 630 is a protective component covering the surface of the cover plate 620. The protective cover 630 is generally U-shaped, and its main function is to provide more comprehensive protection for the battery assembly. The protective cover 630 consists of two layers. The outer layer is an impact-resistant layer, usually made of high-strength materials such as mica and high-strength engineering plastics. The impact-resistant layer can effectively resist the impact of external objects, absorb and disperse the impact force, and prevent the impact force from being directly transmitted to the cover plate 620 and the soft-pack battery unit stack 600, thereby protecting the battery assembly from damage. The inner layer of the protective cover 630 is a high-temperature-resistant layer, generally made of high-temperature-resistant materials such as ceramic fibers and high-temperature-resistant foam. The high-temperature-resistant layer can block the influence of the external high-temperature environment on the battery assembly and prevent the battery performance from decreasing or being damaged due to high temperature. The protective cover 630 is fixedly installed with the baffle 500 by welding to ensure that the protective cover 630 can stably play its protective role during the use of the battery assembly. At the position of the protective cover 630 corresponding to each soft-pack battery unit 100, a king-shaped cut 631 is provided, and the cut 631 is used for exhausting heat of the soft-pack battery unit 100 in thermal runaway.

[0061] In summary, the setting of the protective cover 630 provides double protection for the battery assembly, greatly improving the impact resistance and high-temperature resistance of the battery assembly. The impact-resistant layer effectively protects the battery assembly from external impact damage, and the high-temperature-resistant layer ensures that the battery assembly can work normally in a high-temperature environment, expanding the application range of the battery assembly. In addition, the design of the cut 631 on the protective cover 630 further enhances the safety of the battery assembly.

[0062] As Figure 1 shown, the battery assembly further includes a box body 700 and a liquid cooling plate 710. The liquid cooling plate 710 is laid in the box body 700, the soft-pack battery unit stack 600 is placed on the liquid cooling plate 710, and the baffle 500 is fixedly installed with the box body 700.

[0063] In a specific embodiment, the box body 700 is an external protection structure of the battery assembly, which plays a role in accommodating and protecting the internal components. The box body 700 has a certain strength, can prevent external objects from colliding with and damaging the internal battery assembly, and can also play a certain role in dust and water protection.

[0064] The liquid cooling plate 710 is a component for heat dissipation. The shape of the liquid cooling plate 710 matches that of the box body 700. The liquid cooling plate 710 is laid inside the box body 700, and the soft-pack battery unit stack 600 is arranged on the liquid cooling plate 710, with the two in close contact. The liquid cooling plate 710 is internally provided with a coolant channel, and the coolant circulates in the channel to take away the heat generated when the soft-pack battery unit stack 600 works. A number of first mounting holes 520 are provided around the baffle 500, and screws fix and install the baffle 500 to the box body 700 through the first mounting holes 520. The reinforcing beam 610 is provided with a number of second mounting holes 611 at equal intervals along its length direction. The second mounting holes 611 vertically penetrate through the reinforcing beam 610, and screws fix the reinforcing beam 610 to the box body 700 through the second mounting holes 611, so that the battery assembly forms a structurally stable whole.

[0065] To achieve the object of the present invention, in one embodiment, the present application further provides a battery pack, which includes the battery assembly described in any of the above embodiments. In this embodiment, no specific structure of the battery pack is limited, and it only needs to satisfy that the battery pack includes the above battery assembly.

[0066] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present application.

Claims

1. A battery assembly, characterized in that: include: Pouch cell and mounting assembly; The soft-pack battery unit comprises an aluminum fin, a single soft-pack battery, and foam, two of the aluminum fins are assembled together to form a receiving cavity, a plurality of the single soft-pack batteries are arranged in the receiving cavity, and the plurality of the single soft-pack batteries are divided into a plurality of battery groups, and the single soft-pack batteries in the battery group are connected in series; Foam is provided between two adjacent battery packs, and the foam is used to absorb the expansion of the single soft-pack battery and to provide insulation and heat insulation; The fixing assembly includes a fixing rod and a nut, a plurality of the soft-pack battery cells are arranged adjacent to each other to form a soft-pack battery cell stack, a plurality of the fixing rods penetrate the soft-pack battery cell stack, and the nut is threadedly assembled with the fixing rod so that the soft-pack battery cell is fixed on the fixing rod; The aluminum fin is provided with a plurality of through holes, the through holes are evenly distributed at the ends and the middle of the aluminum fin, and the fixing rod passes through the through holes; the fixing assembly further includes a baffle, the baffle is surrounded by the soft-pack battery cell stack, and the fixing rod is installed based on the baffle; the battery assembly further includes a reinforcing beam, the reinforcing beam is provided in the middle of the soft-pack battery cell stack, the reinforcing beam divides the soft-pack battery cell stack into two parts, and the fixing rod passes through the reinforcing beam; Wherein, the battery assembly also includes a box body, and a plurality of first mounting holes are provided around the baffle, and the fixing rod fixes the baffle and the box body through the first mounting holes, and the reinforcing beam is provided with a plurality of second mounting holes with equal intervals along its length direction, and the second mounting holes vertically penetrate the reinforcing beam, and the fixing rod fixes the reinforcing beam and the box body through the second mounting holes.

2. The battery assembly according to claim 1, characterized in that: The soft-pack battery unit also includes an insulating member, which is fixedly mounted on both ends of the aluminum fin.

3. The battery assembly according to claim 1, characterized in that: A heat insulation board is arranged between two adjacent soft-pack battery units, and the fixing rod passes through the heat insulation board.

4. The battery assembly according to claim 2, characterized in that: The insulating member is provided with a groove, the baffle is provided with a convex strip, the shape of the groove matches the shape of the convex strip, and the convex strip is embedded in the groove.

5. The battery assembly according to claim 1, characterized in that: The battery assembly also includes a cover plate, which covers the top of the soft-pack battery cell stack and is fixedly connected to the baffle. The cover plate is used to enhance the structural strength of the battery assembly.

6. The battery assembly according to claim 5, characterized in that: The battery assembly further comprises a protective cover, which covers the surface of the cover plate, wherein the outer layer of the protective cover is an impact-resistant layer, and the inner layer of the protective cover is a high-temperature-resistant layer.

7. The battery assembly according to claim 1, characterized in that: The battery assembly further includes a liquid cooling plate, which is laid in the box, the battery cells are stacked on the liquid cooling plate, and the baffle is fixedly mounted to the box.

8. The battery assembly according to claim 2, characterized in that: The insulating member is provided with a fixing hole, the fixing hole passes through the insulating member, and the fixing rod passes through the fixing hole.

9. The battery assembly according to claim 3, characterized in that: Double-sided adhesive is provided on both sides of the heat insulation board, so that the heat insulation board can be fixed to the aluminum fins in the soft-pack battery unit.

10. A battery pack, characterized in that: Comprising the battery assembly as described in any one of claims 1-9.

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