Battery assembly and battery pack

Abstract

The invention relates to the technical field of battery manufacturing, in particular to a battery assembly and a battery pack, the battery assembly comprises a soft package battery unit and a fixing assembly, the soft package battery unit comprises aluminum fins, single soft package batteries and foam, the two aluminum fins are spliced to form a containing cavity, a plurality of single soft package batteries are arranged in the containing cavity, and the foam is arranged in the containing cavity. The plurality of single soft-package batteries are divided into a plurality of battery packs, the single soft-package batteries in the battery packs are connected in series, foam is arranged between every two adjacent battery packs, the fixing assembly comprises fixing rods and nuts, the plurality of soft-package battery units are adjacently arranged to form a soft-package battery unit stack, and the plurality of fixing rods penetrate through the soft-package battery unit stack. And the nut and the fixing rod are in threaded assembly, so that the position of each soft package battery unit on the fixing rod is fixed. The problems that a soft package battery grouping scheme adopted by a traditional battery assembly is not high in integration level, a large number of electric connecting pieces and structural pieces need to be arranged, the grouping efficiency is low, and the cost is high are solved.

Description

Technical Field

[0001] The present application relates to the field of battery manufacturing technology, 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 energy-saving and environmental protection advantages. For electric vehicles, power battery technology is an important factor related to their development.

[0003] As a packaging method for power batteries, single soft-pack batteries have many advantages, so the battery components of general electric vehicles all adopt the grouping solution of single soft-pack batteries. The soft-pack battery grouping solution adopted by traditional battery components has low integration and requires the installation of a large number of electrical connectors and structural parts. The grouping efficiency is low and the cost is high. Summary of the invention

[0004] The battery assembly and battery pack provided in the present application are intended to solve the problem that the soft-pack battery grouping solution used in traditional battery assemblies has low integration and requires the installation of a large number of electrical connectors and structural parts, resulting in low grouping efficiency and high cost.

[0005] In order to solve the above technical problems, the present application proposes a battery assembly, which includes: a soft-pack battery unit and a fixing 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. Several of the soft-pack battery cells are arranged adjacent to each other to form a soft-pack battery cell stack. Several of the fixing rods penetrate the soft-pack battery cell stack. The nuts are threadedly assembled with the fixing rods so that the soft-pack battery cells are fixed on the fixing rods.

[0006] Furthermore, the soft-pack battery unit also includes an insulating member, and the insulating member is fixedly mounted on both ends of the aluminum fin.

[0007] Furthermore, the aluminum fin is provided with a plurality of through holes, the through holes are evenly distributed at the end and the middle of the aluminum fin, and the fixing rod passes through the through holes.

[0008] Furthermore, a heat insulation board is provided between two adjacent soft-pack battery units, and the fixing rod passes through the heat insulation board.

[0009] Furthermore, the fixing assembly also includes a baffle, which is enclosed around the soft-pack battery cell stack, and the fixing rod is installed based on the baffle.

[0010] Furthermore, the battery assembly also includes a reinforcing beam, which is arranged 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.

[0011] Furthermore, 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.

[0012] Furthermore, 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, and the cover plate is used to enhance the structural strength of the battery assembly.

[0013] Furthermore, the battery assembly also includes a protective cover, which 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.

[0014] Furthermore, the battery assembly also includes a box body and a liquid cooling plate, the liquid cooling plate is laid in the box body, the battery cells are stacked on the liquid cooling plate, and the baffle is fixedly mounted to the box body.

[0015] Furthermore, 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.

[0016] Furthermore, 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.

[0017] In order to achieve the purpose of the present invention, another aspect of the present invention provides a battery pack, which includes any of the battery assemblies described above.

[0018] The beneficial effects of the present application are as follows: in the battery assembly provided in the present application, the battery assembly includes a soft-pack battery cell and a fixing assembly, the soft-pack battery cell includes an aluminum fin, a single soft-pack battery, and foam, two aluminum fins are assembled to form a receiving cavity, a plurality of single soft-pack batteries are arranged in the receiving cavity, and a plurality of single soft-pack batteries are divided into a plurality of battery groups, the single soft-pack batteries in the battery group are connected in series, and foam is arranged between two adjacent battery groups, and the foam is used to absorb the expansion of the single soft-pack battery and to insulate and heat-insulate, the fixing assembly includes a fixing rod and a nut, a plurality of soft-pack battery cells are arranged adjacent to each other to form a soft-pack battery cell stack, a plurality of fixing rods are passed through the soft-pack battery cell stack, and the nut is threadedly assembled with the fixing rod, so that the position of each soft-pack battery cell on the fixing rod is fixed. Through a highly integrated grouping scheme, the number of modules is reduced, the overall grouping efficiency of the battery assembly can be improved, many electrical connectors and structural parts are omitted, and the cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them: Figure 1 is an exploded view of a battery assembly according to an embodiment of the present invention; Figure 2 This is an exploded view of a battery assembly according to an embodiment of the present invention with the box and liquid cooling plate removed; Figure 3 is a schematic diagram of the three-dimensional structure of a soft-pack battery unit stack and a baffle according to an embodiment of the present invention; Figure 4 is an exploded view of a soft-pack battery cell stack according to an embodiment of the present invention; Figure 5 is a partial enlarged view of a soft-pack battery cell stack according to an embodiment of the present invention; Figure 6 is an exploded view of a soft-pack battery cell according to an embodiment of the present invention; Figure 7 is a schematic diagram of a three-dimensional structure of a portion of a baffle according to an embodiment of the present invention; Figure 8 It is a schematic diagram of the three-dimensional structure of a reinforcing beam and a fixing assembly according to an embodiment of the present invention.

[0020] 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

[0021] 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.

[0022] 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.

[0023] 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.

[0024] like Figure 1 and Figure 6As shown, the present application provides a battery assembly, which includes a soft-pack battery cell 100 and a fixing assembly. The soft-pack battery cell 100 includes an aluminum fin 110, a single soft-pack battery 120, and a foam 130. Two aluminum fins 110 are assembled together to form a receiving cavity. A plurality of single soft-pack batteries 120 are arranged in the receiving cavity, and the plurality of single soft-pack batteries 120 are divided into a plurality of battery groups. The single soft-pack batteries 120 in the battery group are connected in series with each other. Foam 130 is provided between two adjacent battery groups. The foam 130 is used to absorb the expansion of the single soft-pack battery 120 and to provide insulation and heat insulation. The fixing assembly includes a fixing rod 210 and a nut 220. A plurality of soft-pack battery cells 100 are arranged adjacent to each other to form a soft-pack battery cell stack 600. A plurality of fixing rods 210 penetrate the soft-pack battery cell stack 600. The nut 220 is threadedly assembled with the fixing rod 210, so that the soft-pack battery cell stack 600 and the fixing rod 210 form a stable overall structure.

[0025] In a specific embodiment, the aluminum fin 110 is made of aluminum metal with good thermal conductivity, which can promptly dissipate the heat generated by the single soft-pack battery 120 during operation, and prevent the single soft-pack battery 120 from overheating and affecting the performance and life. The aluminum fin 110 is U-shaped, and the openings of the two aluminum fins 110 are opposite and symmetrically spliced ​​together, so that a receiving cavity is formed between the two aluminum fins 110, and the receiving cavity provides an installation space for the single soft-pack battery 120.

[0026] The single soft-pack battery 120 is a battery encapsulated with an aluminum-plastic film. In the present embodiment, a soft-pack battery unit 100 includes two battery packs, each battery pack includes two single soft-pack batteries 120, and the two single soft-pack batteries 120 in each battery pack are connected in series. The output voltage of the battery pack can be increased by connecting in series to meet the voltage requirements of different devices.

[0027] The foam 130 is a material with elasticity and insulation properties. At the same time, a material with high temperature resistance is added to the foam 130. The shape of the foam 130 matches the single soft-pack battery 120. In this embodiment, the foam 130 is placed between two adjacent battery packs. On the one hand, since the single soft-pack battery 120 will expand to a certain extent during the charging and discharging process, the foam 130 can effectively absorb this expansion to prevent the battery packs from being squeezed and damaged; on the other hand, the insulation and heat insulation properties of the foam 130 can prevent electrical short circuits between battery packs, while reducing the transfer of heat between battery packs, ensuring the stability of the battery pack operation.

[0028] In this embodiment, the aluminum fin 110 and the single soft-pack battery 120 , and the single soft-pack battery 120 and the foam 130 are adhered by double-sided tape to enhance the structural stability of the soft-pack battery unit 100 .

[0029] The fixing assembly includes a fixing rod 210 and a nut 220. The fixing rod 210 is a long cylindrical rigid component. A plurality of soft-pack battery cells 100 are arranged in a matrix to form a soft-pack battery cell stack 600. Two through holes 111 are provided at intervals in the middle and at both ends of the aluminum fin 110. The through holes 111 pass through the aluminum fin 110. The fixing rod 210 matches the through holes 111. The fixing rod 210 passes through the through holes 111 in the soft-pack battery cell stack 600. 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 soft-pack battery cell 100 can be fixed on the fixing rod 210 to ensure the stability of the entire battery assembly structure.

[0030] In summary, the internal structural design of the soft-pack battery cell 100 enables the battery pack to operate efficiently and stably. The foam 130 absorbs the expansion of the single soft-pack battery 120 and has an insulating and heat-isolating effect, thereby improving the safety and reliability of the soft-pack battery cell 100. In addition, by arranging a number of soft-pack battery cells 100 into a soft-pack battery cell stack 600 and then fixing them with fixing rods 210 and nuts 220, a highly integrated grouping scheme is formed, which reduces the number of modules, improves the overall grouping efficiency of the battery assembly, omits many electrical connectors and structural parts, and reduces costs.

[0031] like Figure 4 and Figure 5 As shown, the soft-pack battery unit 100 further includes an insulating member 300 , and the insulating member 300 is fixedly mounted on both ends of the aluminum fin 110 .

[0032] In a specific embodiment, the insulating member 300 is a component made of an insulating material. In this battery assembly, the insulating member 300 is fixedly mounted at both ends of the aluminum fin 110, so that the accommodating cavity formed between the two aluminum fins 110 is further blocked, thereby 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 plastic, and its shape and size are designed and customized according to the end shape of the aluminum fin 110 and actual installation requirements. During installation, the insulating member 300 is firmly fixed to both ends of the aluminum fin 110 by a specific fixing method, such as hot melt column fixing, glue pasting, snap connection, etc., to ensure that the insulating member 300 can stably play its insulating role throughout the entire service life of the battery assembly. The insulating part 300 and the aluminum fins 110 form the basic frame of the soft-pack battery unit 100, and the other components of the soft-pack battery unit are installed based on this basic frame. Fixing holes 310 are provided at the upper and lower ends of the insulating part 300, and the fixing holes 310 pass through the insulating part 300. The fixing rods 210 pass through the fixing holes 310. The mutual coordination and positioning between each soft-pack battery unit 100 is achieved by the coordination of the fixing holes 310 on the insulating part 300 and the fixing rods 210, which can further enhance the overall structural stability of the soft-pack battery unit stack 600.

[0033] like Figure 4 As shown, a heat insulation board 400 is provided between two adjacent soft-pack battery units 100 , and the fixing rod 210 passes through the heat insulation board 400 .

[0034] In a specific embodiment, in the soft-pack battery cell stack 600, a heat insulation board 400 is provided between two adjacent soft-pack battery cells 100. The shape of the heat insulation board 400 matches the shape of the aluminum fin 110. The heat insulation board 400 is a plate with good heat insulation performance. Since the soft-pack battery cell 100 generates heat during operation, if the heat is transferred too much between adjacent soft-pack battery cells 100, it may cause the battery pack temperature to be too high, affecting the performance and life of the battery. The function of the heat insulation board 400 is to prevent the transfer of heat between adjacent soft-pack battery cells 100, and ensure that each soft-pack battery cell 100 can work within a suitable temperature range. The heat insulation board 400 is usually made of materials with excellent heat insulation performance such as ceramic fiber and aerogel. The fixing rod 210 passes through the heat insulation board 400, and the heat insulation board 400 and the soft-pack battery cell 100 are fixed on the fixing rod 210 to ensure that the position of the heat insulation board 400 is stable during use. Double-sided adhesive is provided on both sides of the heat insulation board 400, so that the heat insulation board 400 can be tightly bonded with two adjacent aluminum fins 110 to improve the heat insulation efficiency.

[0035] 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 soft-pack battery cells 100, reduces the risk of performance degradation and shortened life of the soft-pack battery cells 100 due to overheating, and improves the overall performance and reliability of the battery assembly by maintaining the temperature stability of each soft-pack battery cell 100.

[0036] like Figure 2 As shown, the fixing assembly further includes a baffle 500 , which is surrounded by the soft-pack battery cell stack 600 , and the fixing rod 210 is installed based on the baffle 500 .

[0037] In a specific embodiment, the baffle 500 is surrounded by the soft-pack battery cell stack 600. The main function of the baffle 500 is to protect and position the soft-pack battery cell stack 600. It can prevent the soft-pack battery cell stack 600 from being hit and squeezed by external objects and protect the soft-pack battery cell 100 from damage. At the same time, the fixing rod 210 runs through the baffle 500, so that the soft-pack battery cell stack 600 and the baffle 500 form an integral structure to stably fix the soft-pack battery cell stack 600 within the space enclosed by the baffle 500. The baffle 500 can be made of metal materials, such as aluminum alloy, which has a certain strength and hardness and can effectively protect the soft-pack battery cell stack 600; it can also be made of high-strength engineering plastics to 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 soft-pack battery cell stack 600 to ensure that it can be tightly enclosed around the soft-pack battery cell stack 600. By enclosing the baffle 500 around the soft-pack battery cell stack 600 , the expansion of the soft-pack battery cell 100 after a long cycle can be effectively limited, thereby improving the cycle performance of the battery assembly.

[0038] In summary, the setting 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 soft-pack battery cell stack 600, reduces the risk of damage to the soft-pack battery cell 100 by external factors, and prolongs the service life of the battery assembly. At the same time, as the installation basis of the fixing rod 210, the baffle 500 makes the installation of the fixing assembly more secure, further enhancing the integrity of the soft-pack battery cell stack 600.

[0039] like Figure 2 and Figure 8 As shown, the battery assembly further includes a reinforcing beam 610 , which is disposed in the middle of the soft-pack battery cell stack 600 . The reinforcing beam 610 divides the soft-pack battery cell stack 600 into two parts, and the fixing rod 210 passes through the reinforcing beam 610 .

[0040] In a specific embodiment, the reinforcing beam 610 is a rectangular plate, and the reinforcing beam 610 is arranged in the middle of the soft-pack battery cell stack 600, which divides the soft-pack battery cell stack 600 into two parts. In another specific embodiment, the reinforcing beam 610 can be arranged as a plurality of parallel and spaced-apart beams, and the plurality of reinforcing beams 610 evenly divide the soft-pack battery cell stack 600 into several parts. The main function of the reinforcing beam 610 is to enhance the overall structural strength of the soft-pack battery cell stack 600. The soft-pack battery cell stack 600 is prone to deformation when subjected to external forces, especially large bending forces or pressures. The presence of the reinforcing beam 610 can effectively resist such deformation and disperse and withstand external forces through its own high strength. The reinforcing beam 610 is usually made of metal materials, such as steel or high-strength aluminum alloy, and has good bending and compression resistance. The fixing rod 210 runs through the reinforcing beam 610 to fix the position of the reinforcing beam 610.

[0041] In summary, the provision 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 soft-pack battery cell stack 600 to resist deformation due to external forces. By dividing the soft-pack battery cell stack 600 into two parts, the reinforcing beam 610 enables the entire battery assembly to form a more stable structural system, thereby improving the reliability of the battery assembly under complex working conditions.

[0042] like Figure 5 and Figure 7 As shown, a groove 320 is provided on the insulating member 300 , and a convex strip 510 is provided on the baffle 500 . The shape of the groove 320 matches the shape of the convex strip 510 , and the convex strip 510 is embedded in the groove 320 .

[0043] In a specific embodiment, a strip-shaped groove 320 is provided on the top of the insulating member 300, and a convex strip 510 matching the groove 320 is provided on the side of the baffle 500 corresponding to the insulating member 300. The function of the groove 320 is to cooperate with the convex strip 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 convex strip 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 connectors, and a stable connection can be achieved only through the shape matching of the components themselves, which simplifies the installation process and improves the reliability of the connection.

[0044] In summary, the insulating member 300 and the baffle 500 are connected by the groove 320 and the convex strip 510, which improves the connection stability between the insulating member 300 and the baffle 500, reduces the risk of separation due to external forces such as vibration and impact, and further ensures the structural stability of the entire battery assembly. Secondly, no additional connectors are required, which reduces production costs and installation difficulties and improves production efficiency.

[0045] like Figure 3 As shown, the baffle 500 includes an end plate 501 and a side plate 502, both of which are rectangular. The two end plates 501 are arranged in parallel and spaced apart on both sides of the soft-pack battery cell stack 600, and the two side plates 502 are arranged in parallel and spaced apart on both sides of the soft-pack battery cell 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 cell stack 600. In the process of assembling the soft-pack battery cell stack 600 and the baffle 500, it is necessary to apply glue to the side plates 502 so that the soft-pack battery cell stack 600 and the side plates 502 are bonded to form a whole, and then the side plates 502 are welded and fixed to the cover plate 620 to increase the overall structural strength of the battery assembly.

[0046] like Figure 2 As shown, the battery assembly further includes a cover plate 620 , which covers the top of the soft-pack battery cell stack 600 , and is fixedly connected to the baffle 500 , and is used to enhance the structural strength of the battery assembly.

[0047] In a specific embodiment, the cover plate 620 is a rectangular plate, the shape of the cover plate 620 matches the shape of the soft-pack battery cell stack 600, the cover plate 620 covers the top of the soft-pack battery cell stack 600, and the cover plate 620 is fixed to the baffle 500 by welding. The provision of the cover plate 620 improves the structural strength and protective performance of the battery assembly, and effectively protects the soft-pack battery cell stack 600 from impact and damage by external objects. By fixing and welding the cover plate 620 to the baffle 500, the integrity and compressive resistance of the entire battery assembly are enhanced. The cover plate 620 is provided with an opening 621 corresponding to the position of each soft-pack battery cell 100, and the opening 621 is in the shape of a long strip, and the opening 621 can be used as an exhaust channel when the soft-pack battery cell 100 is thermally runaway.

[0048] like Figure 2 As shown, the battery assembly further includes a protective cover 630 , which covers the surface of the cover plate 620 , wherein 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.

[0049] 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 roughly U-shaped. The main function of the protective cover 630 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, which is usually made of high-strength materials such as mica, high-strength engineering plastics, etc. 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 cell stack 600, thereby protecting the battery assembly from damage. The inner layer of the protective cover 630 is a high-temperature resistant layer, which is generally made of high-temperature resistant materials such as ceramic fiber 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 being degraded or 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. A V-shaped cutout 631 is provided at a position of the protective cover 630 corresponding to each soft-pack battery cell 100 , and the cutout 631 is used to exhaust and dissipate heat for the soft-pack battery cell 100 that is in thermal runaway.

[0050] In summary, the setting of the protective cover 630 provides dual protection for the battery assembly, greatly improving the impact resistance and high temperature resistance of the battery assembly. The impact resistance layer effectively protects the battery assembly from damage caused by external impact, and the high temperature resistance layer ensures that the battery assembly can work normally in a high temperature environment, expanding the application range of the battery assembly, and the cut-off 631 design on the protective cover 630 further enhances the safety of the battery assembly.

[0051] like Figure 1 As shown, the battery assembly also 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 cell stack 600 falls on the liquid cooling plate 710 , and the baffle 500 is fixedly installed with the box body 700 .

[0052] In a specific embodiment, the box body 700 is the external protection structure of the battery assembly, which plays the role of accommodating and protecting the internal components. The box body 700 has a certain strength, which can prevent external objects from colliding with and damaging the internal battery components, and can also play a certain dustproof and waterproof role.

[0053] The liquid cooling plate 710 is a component for heat dissipation. The shape of the liquid cooling plate 710 matches the box 700. The liquid cooling plate 710 is laid inside the box 700. The soft pack battery cell stack 600 is arranged on the liquid cooling plate 710. The two are in close contact. A cooling liquid channel is arranged inside the liquid cooling plate 710. The cooling liquid circulates in the channel to take away the heat generated by the soft pack battery cell stack 600 when working. A plurality of first mounting holes 520 are arranged around the baffle 500. The baffle 500 is fixedly mounted to the box 700 through the first mounting holes 520. The reinforcing beam 610 is provided with a plurality of second mounting holes 611 with equal spacing along its length direction. The second mounting holes 611 vertically penetrate the reinforcing beam 610. The screws pass through the second mounting holes 611 to fix the reinforcing beam 610 to the box 700, so that the battery assembly forms a structurally stable whole.

[0054] In order to achieve the purpose 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, there is no limitation on the specific structure of the battery pack, and it is sufficient that the battery pack includes the above battery assembly.

[0055] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also 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. Several of the soft-pack battery cells are arranged adjacent to each other to form a soft-pack battery cell stack. Several of the fixing rods penetrate the soft-pack battery cell stack. The nuts are threadedly assembled with the fixing rods so that the soft-pack battery cells are fixed on the fixing rods.

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: The aluminum fin is provided with a plurality of through holes, which are evenly distributed at the end and the middle of the aluminum fin, and the fixing rod passes through the through holes.

4. 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.

5. The battery assembly according to claim 2, characterized in that: The fixing assembly further includes a baffle plate, which is enclosed around the soft-pack battery cell stack, and the fixing rod is installed based on the baffle plate.

6. The battery assembly according to claim 5, characterized in that: The battery assembly further includes a reinforcing beam, which 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 passes through the reinforcing beam.

7. The battery assembly according to claim 5, 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.

8. The battery assembly according to claim 5, 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.

9. The battery assembly according to claim 8, 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.

10. The battery assembly according to claim 5, characterized in that: The battery assembly further includes a box body and a liquid cooling plate, wherein the liquid cooling plate is laid in the box body, the battery cells are stacked on the liquid cooling plate, and the baffle is fixedly mounted to the box body.

11. 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.

12. The battery assembly according to claim 4, 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.

13. A battery pack, characterized in that: Comprising the battery assembly as described in any one of claims 1-11.

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