Battery pack box body, battery pack and vehicle

Abstract

The utility model provides a battery pack box body, a battery pack and a vehicle, and aims to reduce the production cost of the battery pack box body. The battery pack box comprises a first shell and a second shell, the first shell comprises a bottom plate and a plurality of side plates connected with the bottom plate, and the side plates and the bottom plate are of an integrally-formed structure and define a containing cavity; and the cooling plate is arranged in the containing cavity and attached to the bottom plate, and a cooling flow channel allowing cooling liquid to circulate is formed between the cooling plate and the bottom plate. According to the battery pack disclosed by the invention, the bottom plate and the plurality of side plates of the first shell adopt an integrally molded structure, and the cooling flow channel is jointly formed by the cooling plate and the bottom plate. Therefore, the manufacturing process of the battery pack box body is simplified, the production efficiency is improved, and the production cost of the battery pack box body is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack case, a battery pack and a vehicle. Background Art

[0002] Thanks to the multiple advantages of new energy vehicles, such as cost-effectiveness, response to environmental protection policies and advanced technology, new energy vehicles have become one of the mainstream choices in the vehicle consumer market.

[0003] Battery packs are the primary power source for new energy vehicles. In related technologies, the manufacturing process for battery pack housings is complex and costly. Utility Model Content

[0004] The present application provides a battery pack case, a battery pack, and a vehicle, so as to help reduce the production cost of the battery pack case.

[0005] In the first aspect, the present application proposes a battery pack case, which includes: a first shell, the first shell including a bottom plate and a plurality of side plates connected to the bottom plate, the plurality of side plates and the bottom plate are an integrally formed structure and are arranged to form a accommodating cavity; and a cooling plate, which is arranged in the accommodating cavity and connected to the bottom plate, and a cooling channel for the circulation of coolant is formed between the cooling plate and the bottom plate.

[0006] In some embodiments, a groove is provided on a side surface of the bottom plate close to the accommodating cavity, and the cooling plate and the groove together form the cooling channel.

[0007] In some embodiments, the first shell is made of a fiber-reinforced composite material or an aluminum alloy, and the cooling plate is made of metal.

[0008] In some embodiments, when the material of the first shell is a fiber-reinforced composite material, the cooling plate is bonded to the base plate via a first adhesive layer, and the orthographic projection of the first adhesive layer on the base plate does not overlap with the orthographic projection of the cooling channel on the base plate;

[0009] When the first shell is made of aluminum alloy, the cooling plate is connected to the bottom plate by welding.

[0010] In some embodiments, the cooling plate is provided with a water inlet interface and a water outlet interface communicating with the cooling flow channel, and the first shell is provided with a first through hole and a second through hole;

[0011] The battery pack case also includes a water inlet and a water outlet. One end of the water inlet is connected to the water inlet interface, and the other end extends out of the first shell through the first through hole. One end of the water outlet is connected to the water outlet interface, and the other end extends out of the first shell through the second through hole.

[0012] In some embodiments, the battery pack case further includes at least one first partition, the at least one first partition and the first shell are integrally formed, and the at least one first partition divides the accommodating cavity into a plurality of sub-accommodating cavities;

[0013] The cooling plate includes a plurality of sub-cooling plates respectively located in the plurality of sub-accommodating cavities, and the cooling channel includes a plurality of sub-cooling channels formed by the plurality of sub-cooling plates and the bottom plate.

[0014] In some embodiments, the number of the first partitions is one, and the first partition divides the accommodating cavity into a first sub-accommodating cavity and a second sub-accommodating cavity; the cooling plate includes a first sub-cooling plate located in the first sub-accommodating cavity and a second sub-cooling plate located in the second sub-accommodating cavity, the cooling channel includes a first sub-cooling channel formed by the first sub-cooling plate and the bottom plate, and a second sub-cooling channel formed by the second sub-cooling plate and the bottom plate, the first sub-cooling plate is provided with a first interface and a second interface communicating with the first sub-cooling channel, and the second sub-cooling plate is provided with a third interface and a fourth interface communicating with the second sub-cooling channel; the battery pack case also includes a pipe assembly, which is connected to the first interface, the second interface, the third interface and the fourth interface; the pipe assembly is configured to supply coolant to flow into the first sub-cooling channel and the second sub-cooling channel and out of the first sub-cooling channel and the second sub-cooling channel, and the pipe assembly is also configured to connect the first sub-cooling channel and the second sub-cooling channel.

[0015] In some embodiments, at least a portion of the side surface of the multiple side panels facing away from the accommodating cavity is provided with a recessed cavity, and a plurality of reinforcing ribs connected to the side panels are provided in the recessed cavity, and the plurality of reinforcing ribs are arranged in a mesh-like staggered manner.

[0016] In some embodiments, the battery pack case further includes a second shell and a bottom guard plate, the second shell is detachably connected to the first shell to seal the accommodating cavity, and the bottom guard plate is installed on the side of the bottom plate away from the cooling plate.

[0017] In a second aspect, the present application proposes a battery pack, comprising a battery and the battery pack case described in the first aspect, wherein the battery is disposed in the accommodating cavity.

[0018] In a third aspect, the present application proposes a vehicle comprising the battery pack described in the second aspect.

[0019] In the battery pack of the present application, the bottom plate and multiple side plates of the first shell adopt an integrally formed structure. Compared with the split structure in the related art, the integrally formed structure reduces the number of parts and assembly steps, which is conducive to simplifying the manufacturing process of the first shell, thereby helping to improve production efficiency and reduce manufacturing costs. Furthermore, the cooling channel is formed by the cooling plate and the bottom plate. That is, it is only necessary to form a channel shape, that is, a groove, on one of the cooling plate and the bottom plate, and the cooling channel can be formed by installing the cooling plate. Compared with the method of forming the cooling channel inside the cooling plate in the related art, the manufacturing process of the cooling plate can be simplified, thereby helping to improve production efficiency and reduce manufacturing costs. Therefore, it is conducive to simplifying the manufacturing process of the battery pack case, improving production efficiency, and thereby helping to reduce the production cost of the battery pack case. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the exploded structure of a battery pack provided in one embodiment of the present application;

[0021] Figure 2 A schematic diagram of a structure in which a partition plate and a groove are provided in a first shell according to an embodiment of the present application;

[0022] Figure 3 for Figure 1 A schematic structural diagram of the cooling plate and the first adhesive layer of the battery pack shown;

[0023] Figure 4 for Figure 3 Schematic diagram of the exploded structure of the cooling plate and the first adhesive layer shown;

[0024] Figure 5 A schematic diagram of the exploded structure of a battery pack provided in yet another embodiment of the present application;

[0025] Figure 6 for Figure 5 Schematic diagram of the structure of the cooling plate of the battery pack;

[0026] Figure 7 for Figure 6 Schematic diagram of the exploded structure of the cooling plate shown in;

[0027] Figure 8 A schematic diagram of the structure of the connection between the first shell, the first partition plate, and the cooling plate provided in one embodiment of the present application;

[0028] Figure 9 A schematic diagram of the structure of the connection between the pipe assembly and the first and second sub-cooling plates provided in one embodiment of the present application;

[0029] Figure 10 A schematic structural diagram of the connection between a connecting pipe assembly and a first sub-cooling plate and a second sub-cooling plate provided in another embodiment of the present application.

[0030] The description of the reference numerals in the figures is as follows:

[0031] 10-battery pack;

[0032] 110-first shell, 101-accommodation chamber, 101a-first sub-accommodation chamber, 101b-second sub-accommodation chamber, 102-first through hole, 103-second through hole, 111-bottom plate, 1111-groove, 112-side plate, 120-cooling plate, 120a-first sub-cooling plate, 120b-second sub-cooling plate, 121-water inlet interface, 122-water outlet interface, 123-first interface, 124-second interface, 125-third interface, 126-fourth interface, 130- First adhesive layer, 140-water inlet component, 141-water inlet pipe, 142-water inlet joint, 150-water outlet component, 151-water outlet pipe, 152-water outlet joint, 160-first baffle, 170-pipe connection assembly, 171-first pipe, 172-second pipe, 173-first joint, 174-second joint, 175-third pipe, 176-connecting pipe, 180-second baffle, 190-recessed cavity, 191-reinforcement rib, 192-second shell, 193-bottom guard plate;

[0033] 200-battery. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0035] In the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0037] In the description of this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise expressly limited. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0038] In the first aspect, the present application proposes a battery pack case. Figure 1 and Figure 2 As shown, the battery pack case includes a first shell 110 and a cooling plate 120. The first shell 110 includes a bottom plate 111 and multiple side plates 112 connected to the bottom plate 111. The multiple side plates 112 and the bottom plate 111 are an integrally formed structure. The multiple side plates 112 and the bottom plate 111 are jointly arranged to form a accommodating cavity 101. The cooling plate 120 is arranged in the accommodating cavity 101 and is connected to the bottom plate 111. A cooling flow channel for the circulation of coolant is formed between the cooling plate 120 and the bottom plate 111 (not shown in the figure).

[0039] The battery pack case of the present application includes a first shell 110 and a cooling plate 120. The first shell 110 includes a bottom plate 111 and a plurality of side plates 112. The number of side plates 112 can be determined according to the shape of the battery pack case. For example, when the shape of the battery pack case is a rectangular parallelepiped, the number of side plates 112 is four; or, when the shape of the battery pack case is a cylinder, the number of side plates 112 is one, and the present application does not impose any restrictions on this. The bottom plate 111 and the plurality of side plates 112 are arranged to form a accommodating cavity 101 with an opening at one end, and the power battery 200 can be placed in the accommodating cavity 101. It should be noted that the battery 200 may include at least one battery module, and may also include a plurality of battery cells, and the present application does not impose any restrictions on this.

[0040] The cooling plate 120 is disposed within the accommodating cavity 101 and is attached to and fixedly connected to the bottom plate 111, thereby forming a cooling channel for the coolant to circulate between the cooling plate 120 and the bottom plate 111. When the battery 200 is placed within the accommodating cavity 101, the bottom of the battery 200 aligns with the cooling plate 120, allowing the coolant in the cooling channel to dissipate heat from the battery 200 through the cooling plate 120, thereby improving the safety and reliability of the battery pack 10.

[0041] In the battery pack 10 of the present application, the bottom plate 111 and the multiple side plates 112 of the first shell 110 adopt an integrally formed structure, for example, they can be formed in one go by injection molding, die casting, forging, or the like. Compared with the split structure in the related art, the integrally formed structure reduces the number of parts and assembly steps, thereby simplifying the manufacturing process of the first shell 110, thereby improving production efficiency and reducing manufacturing costs. Furthermore, the cooling channel is formed by the cooling plate 120 and the bottom plate 111. That is, only the channel shape, i.e., the groove 1111, needs to be formed on one of the cooling plate 120 and the bottom plate 111, and the cooling channel can be formed by installing the cooling plate 120. Compared with the method of forming the cooling channel inside the cooling plate 120 in the related art, the manufacturing process of the cooling plate 120 can be simplified, thereby improving production efficiency and reducing manufacturing costs. Therefore, it is beneficial to simplify the manufacturing process of the battery pack case, improve production efficiency, and thereby reduce the production cost of the battery pack case. Furthermore, the first housing 110 is an integrally molded structure, with no seams between the bottom plate 111 and the side plates 112. This improves the sealing performance and aesthetics of the battery pack case. Furthermore, the first housing 110 acts as a single unit to disperse and resist stress when subjected to external forces, significantly enhancing the structural strength and impact resistance of the battery pack case. Furthermore, the cooling plate 120 is directly integrated with the bottom plate 111 and, together with the bottom plate 111, forms a cooling channel, reducing the thickness of the cooling plate 120 and the space it occupies, thereby further improving the energy density of the battery pack 10.

[0042] It should be noted that the orthographic projection of the cooling channel on the bottom plate 111 can have various shapes, and the shape of the cooling channel is the same as the shape of the groove 1111. For example, the cooling channel can extend in a winding manner; or the cooling channel can extend in a combination of straight lines and curves, etc. This application does not impose any restrictions on this, and the specific design can be flexible according to the heat dissipation requirements of the battery 200.

[0043] In some embodiments, as Figure 2 As shown, a groove 1111 is provided on one side surface of the bottom plate 111 close to the accommodating cavity 101 , and the cooling plate 120 and the groove 1111 together form a cooling channel.

[0044] This embodiment proposes a method for forming a cooling channel. Specifically, a groove 1111 is provided on the bottom plate 111, and the cooling plate 120 is in the shape of a plate. When the cooling plate 120 is installed on the bottom plate 111, the bottom plate 111 and the groove 1111 are closed to form a cooling channel. In this embodiment, the cooling channel is formed by making a groove 1111 on the bottom plate 111, and the groove 1111 can be formed simultaneously during the one-piece molding process of the first shell 110. In other words, the groove 1111 and the first shell 110 are also an one-piece molding structure. This is conducive to further simplifying the manufacturing process of the battery pack case, improving production efficiency, and further reducing the production cost of the battery pack case. In addition, the cooling plate 120 does not require additional channel processing, which is also conducive to improving the manufacturing efficiency of the cooling plate 120.

[0045] It is readily understood that the cooling channel can also be formed in other ways. For example, a groove 1111 may be machined on the surface of the cooling plate 120 near the bottom plate 111, while the bottom plate 111 is not machined with the groove 1111, and the two are assembled to form the cooling channel; or grooves 1111 may be machined on both the cooling plate 120 and the bottom plate 111, and the two are assembled to form the cooling channel.

[0046] In some embodiments, the first housing 110 is made of a fiber-reinforced composite material or an aluminum alloy. For example, the first housing 110 can be made of a glass fiber-reinforced composite material or a carbon fiber-reinforced composite material. Fiber-reinforced composite materials are lightweight and high-strength, thereby helping to reduce the weight of the first housing 110 and improve its structural strength. Furthermore, the first housing 110's thermal conductivity is not too strong, thereby improving its thermal insulation performance.

[0047] Alternatively, the first housing 110 may be made of aluminum alloy, which has a relatively low density and high strength, thereby reducing the weight of the first housing 110 and improving its structural strength.

[0048] In some embodiments, the cooling plate 120 is made of metal, such as copper, copper alloy, aluminum, aluminum alloy, etc., which have high thermal conductivity and strong corrosion resistance. This helps improve the thermal conductivity and corrosion resistance of the cooling plate 120.

[0049] In some embodiments, when the material of the first shell 110 is a fiber reinforced composite material, such as Figures 1 to 4As shown, the cooling plate 120 is bonded to the base plate 111 via a first adhesive layer 130. The orthographic projection of the first adhesive layer 130 on the base plate 111 does not overlap with the orthographic projection of the cooling channel on the base plate 111. The first adhesive layer 130 may be, for example, a structural adhesive. When the first housing 110 is made of a fiber-reinforced composite material, the first adhesive layer 130 connects the base plate 111 of the first housing 110 to the cooling plate 120. This reduces the difficulty of installing the cooling plate 120, simplifies the manufacturing process, and reduces costs while ensuring connection reliability.

[0050] Furthermore, the orthographic projection of the first adhesive layer 130 on the bottom plate 111 does not overlap with the orthographic projection of the cooling channel on the bottom plate 111. In other words, the first adhesive layer 130 avoids the grooves 1111 provided on the cooling plate 120 and / or the bottom plate 111, so that the first adhesive layer 130 does not block the cooling channel, thereby improving the heat dissipation efficiency of the cooling plate 120 and, in turn, the heat dissipation performance of the battery pack casing.

[0051] In some embodiments, when the material of the first housing 110 is aluminum alloy, such as Figure 5 and Figure 6 As shown, the cooling plate 120 is welded to the base plate 111. Since both the first housing 110 and the cooling plate 120 are made of metal, welding simplifies the process and reduces costs. Furthermore, welded connections are less susceptible to environmental factors such as temperature and humidity, maintaining connection reliability even under harsh operating conditions.

[0052] In some embodiments, as Figure 5 、 Figure 6 and Figure 7 As shown, the cooling plate 120 is provided with a water inlet interface 121 and a water outlet interface 122 that communicate with the cooling flow channel. The first shell 110 is provided with a first through hole 102 and a second through hole 103. The battery pack case also includes a water inlet member 140 and a water outlet member 150. One end of the water inlet member 140 is connected to the water inlet interface 121, and the other end extends out of the first shell 110 through the first through hole 102. One end of the water outlet member 150 is connected to the water outlet interface 122, and the other end extends out of the first shell 110 through the second through hole 103. As a result, the coolant in the cooling flow channel can flow in and out through the water inlet member 140 and the water outlet member 150. At the same time, the other ends of the water inlet member 140 and the water outlet member 150 are located outside the first shell 110, which also facilitates the connection of the water inlet member 140 and the water outlet member 150 to the water cooling system of the entire vehicle.

[0053] Optionally, the water inlet member 140 may include a water inlet pipe 141 and a water inlet connector 142, wherein the water inlet connector 142 is used to connect to the water outlet of the external cooling system. The water outlet member 150 may include a water outlet pipe 151 and a water outlet connector 152, wherein the water outlet connector 152 is used to connect to the water inlet of the external cooling system.

[0054] In some embodiments, as Figure 8 As shown, the battery pack body further includes at least one first partition 160 , which divides the accommodating cavity 101 into a plurality of sub-accommodating cavities. The cooling plate 120 is located between the first partition 160 and the bottom plate 111 .

[0055] In this embodiment, the cooling plate 120 is a whole plate and is installed on the base plate 111. Under this structure, the cooling channel is also an integral structure. Furthermore, after the cooling plate 120 is installed, at least one first partition 160 is set on the side of the cooling plate 120 away from the base plate 111, thereby dividing the accommodating cavity 101 into a plurality of sub-accommodating cavities. For example, when there is one first partition 160, it is divided into two sub-accommodating cavities; when there are two first partitions 160, it is divided into three sub-accommodating cavities. The number of first partitions 160 can be set flexibly. Batteries 200 can be placed in all the sub-accommodating cavities, thereby realizing the grouping requirements of the batteries 200 in the accommodating cavity 101, which is beneficial to improving the scalability of the battery pack case.

[0056] In addition, it should be noted that the water inlet port 121 and the water outlet port 122 can be provided on the portion of the cooling plate 120 located within the two outermost sub-accommodation chambers 101. This allows the coolant to fully circulate before flowing out. This flow path ensures that the coolant fully contacts the cooling plate 120, thereby maximizing the cooling efficiency of the cooling plate 120 on the battery cells or battery modules.

[0057] In other embodiments, Figure 1 and Figure 2 As shown, the battery pack case includes at least one first partition 160. The at least one first partition 160 and the first shell 110 are an integrally formed structure. The at least one first partition 160 divides the accommodating cavity 101 into a plurality of sub-accommodating cavities. In other words, the first partition 160 and the first shell 110 are also manufactured simultaneously through an integral molding process. As a result, it is beneficial to simplify the manufacturing process of the battery pack case while meeting the requirements of the battery 200 partitioning, improve production efficiency, and further reduce the production cost of the battery pack case. In addition, the first partition 160 and the first shell 110 adopt an integrally formed structure, which is also beneficial to further enhance the overall structural strength of the battery pack case.

[0058] It is easy to understand that since the first partition 160 has been formed in the accommodating cavity 101 through an integral molding process, the cooling plate 120 needs to be installed with the bottom plate 111. In order to improve the installation convenience of the cooling plate 120, as shown in FIG. Figures 1 to 4 As shown, the cooling plate 120 is divided into multiple sub-plates, and the cooling channel is also divided into multiple sub-cooling channels. Specifically, the cooling plate 120 includes multiple sub-cooling plates respectively located in multiple sub-accommodating cavities 101, and the cooling channel includes multiple sub-cooling channels formed by the multiple sub-cooling plates 120 and the bottom plate 111. In this way, the battery 200 in each sub-accommodating cavity can meet its heat dissipation requirements through the independently arranged sub-cooling channels and sub-cooling plates, thereby further improving the heat dissipation performance and safety of the battery pack case.

[0059] In a specific embodiment, Figures 1 to 4 As shown, there is one first partition 160, which divides the accommodating chamber 101 into a first sub-accommodating chamber 101a and a second sub-accommodating chamber 101b. The cooling plate 120 includes a first sub-cooling plate 120a located in the first sub-accommodating chamber 101a and a second sub-cooling plate 120b located in the second sub-accommodating chamber 101b. The cooling channel includes a first sub-cooling channel formed by the first sub-cooling plate 120a and the bottom plate 111, and a second sub-cooling channel formed by the second sub-cooling plate 120b and the bottom plate 111. In this way, the batteries 200 in the accommodating chamber 101 can be arranged into two groups, and heat dissipation is achieved through the first sub-cooling plate 120a and the second sub-cooling plate 120b, thereby achieving the grouping requirement of the batteries 200.

[0060] Furthermore, if Figure 1 、 Figure 4 、 Figure 9 As shown, the first sub-cooling plate 120a is provided with a first interface 123 and a second interface 124 communicating with the first sub-cooling channel, and the second sub-cooling plate 120b is provided with a third interface 125 and a fourth interface 126 communicating with the second sub-cooling channel. The battery pack case also includes a pipe assembly 170, which is connected to the first interface 123, the second interface 124, the third interface 125 and the fourth interface 126. The pipe assembly 170 is configured to allow coolant to flow into the first sub-cooling channel and the second sub-cooling channel and to flow out from the first sub-cooling channel and the second sub-cooling channel. The pipe assembly 170 is also configured to connect the first sub-cooling channel and the second sub-cooling channel.

[0061] This embodiment proposes a method of realizing the inflow and outflow of coolant through two sub-cooling channels. Specifically, the battery pack case further includes a pipe assembly 170, and the pipe assembly 170 is connected to the first interface 123, the second interface 124, the third interface 125 and the fourth interface 126. In this way, the pipe assembly 170 can realize the inflow and outflow of coolant in the first sub-cooling channel through the first interface 123 and the second interface 124; the pipe assembly 170 can realize the inflow and outflow of coolant in the second sub-cooling channel through the third interface 125 and the fourth interface 126. Furthermore, the pipe assembly 170 also has the function of connecting the first sub-cooling channel and the second sub-cooling channel, thereby realizing the circulation of coolant between the first sub-cooling channel and the second sub-cooling channel. By providing the pipe assembly 170, it is beneficial to improve the convenience of connecting the battery pack case to the cooling system of the entire vehicle, and it is also beneficial to improve the convenience of coolant circulation in the first sub-cooling channel and the second sub-cooling channel.

[0062] It should be noted that there are various ways to connect the pipe assembly 170 to the first sub-cooling plate 120a and the second sub-cooling plate 120b, which are described in detail below.

[0063] For example, in some embodiments, Figure 4 and Figure 9 As shown, the pipe assembly 170 includes a first pipe 171, a second pipe 172, a first connector 173, and a second connector 174. One end of the first pipe 171 is connected to the first interface 123 and the other end is connected to the third interface 125. The first connector 173 is connected to the first pipe 171 and is the water inlet connector. The second pipe 172 is connected to the second interface 124 at one end and to the fourth interface 126 at the other end. The second connector 174 is connected to the second pipe 172 and is the water outlet connector. Thus, the pipe assembly 170 enables coolant to flow in and out of the first and second sub-cooling channels, as well as to connect the first and second sub-cooling channels.

[0064] For example, in other embodiments, Figure 10As shown, the pipe assembly 170 includes a first pipe 171, a second pipe 172, a third pipe 175, a first connector 173, and a second connector 174. One end of the first pipe 171 is connected to the first interface 123, and the other end is connected to the first connector 173, which is the water inlet connector. One end of the second pipe 172 is connected to the fourth interface 126, and the other end is connected to the second connector 174, which is the water outlet connector. One end of the third pipe 175 is connected to the second interface 124, and the other end is connected to the third interface 125. Thus, the pipe assembly 170 enables coolant to flow into and out of the first and second sub-cooling channels, as well as to connect the first and second sub-cooling channels.

[0065] For example, in some other embodiments, the pipe assembly 170 includes a first pipe 171, a second pipe 172, a third pipe (not shown in the figure), a fourth pipe (not shown in the figure), a first joint 173, a second joint 174, a third joint (not shown in the figure) and a fourth joint (not shown in the figure), one end of the first pipe 171 is connected to the first interface 123, and the other end is connected to the first joint 173, and the first joint 173 is a first water inlet joint; one end of the second pipe 172 is connected to the fourth interface 126, and the other end is connected to the second joint 174, and the second joint 174 is a second water inlet joint; one end of the third pipe is connected to the second interface 124, and the other end is connected to the third joint, and the third joint is a first water outlet joint; one end of the fourth pipe is connected to the third interface 125, and the other end is connected to the fourth joint, and the fourth joint is a second water outlet joint. Thus, the pipe assembly 170 can realize the flow of coolant from the first sub-cooling channel and the second sub-cooling channel, and realize the communication between the first sub-cooling channel and the second sub-cooling channel.

[0066] It should be noted that the above only lists several exemplary ways of connecting the connecting pipe assembly 170 to the first sub-cooling plate 120a and the second sub-cooling plate 120b. The connecting pipe assembly 170 can also have other structures as long as it can achieve the above multiple functions.

[0067] In addition, the number of the first partition plate 160, the sub-cooling plate 120 and the sub-cooling channel can also be more, and the structure of the pipe assembly 170 can also be changed accordingly to achieve the above functions, and this application does not limit this. Figure 2 and Figure 4 As shown, the sub-cooling channels in each sub-accommodating cavity can also be further designed to be split, and then the connection between the multiple split sub-cooling channels in each sub-accommodating cavity can be achieved through connecting pipes 176, and this application does not impose any restrictions on this.

[0068] In some embodiments, as Figure 1 、 Figure 8As shown, the battery pack case also includes two second partitions 180 arranged parallel to the accommodating cavity 101. The second partitions 180 are perpendicular to the first partitions 160. The orthographic projection of the cooling channel on the bottom plate 111 is located in the accommodating space enclosed by the two second partitions 180, the bottom plate 111, and the side plates 112. In this structure, the battery 200 is also located in the accommodating space enclosed by the two second partitions 180, the bottom plate 111, and the side plates 112. By providing the second partitions 180, the expansion force of the battery cells or battery modules during operation can be alleviated, thereby further improving the safety and reliability of the battery pack case.

[0069] In some embodiments, as Figure 1 and Figure 2 As shown, at least a portion of the side surface of the multiple side panels 112 facing away from the accommodating cavity 101 is provided with a recessed cavity 190. Within the recessed cavity 190 are multiple reinforcing ribs 191 connected to the side panels 112. The multiple reinforcing ribs 191 are arranged in a staggered, lattice-like pattern, thereby dividing the recessed cavity into multiple smaller recessed cavities. This arrangement not only further improves the strength of the first housing 110, but also helps reduce weight, achieving the lightweight requirements of the first housing 110.

[0070] In some embodiments, as Figure 1 As shown, the battery pack case also includes a second shell 192 and a bottom guard plate 193. The second shell 192 is detachably connected to the first shell 110 to seal the accommodating cavity 101. The bottom guard plate 193 is installed on the side of the bottom plate 111 facing away from the cooling plate 120. By providing the second shell 192, the accommodating cavity 101 can be sealed, protecting the internal battery 200 and other key components from the external environment. By providing the bottom guard plate 193, the first shell 110 can be protected from impact and wear from the ground or bottom, thereby improving the strength and reliability of the battery pack case.

[0071] In a second aspect, the present application provides a battery pack 10. The battery pack 10 includes the battery pack case described in the first aspect and a battery 200, which is disposed within a housing 101. It should be noted that the battery 200 may include at least one battery module or multiple battery cells, and this application does not impose any restrictions on this.

[0072] The battery pack 10 of the present application uses the battery pack case described in the first aspect, which is beneficial to simplifying the manufacturing process of the battery pack case, improving production efficiency, and further helping to reduce the production cost of the battery pack case and the battery pack 10.

[0073] In a third aspect, the present application provides a vehicle comprising the battery pack 10 described in the second aspect, thereby helping to reduce the production cost of the vehicle.

[0074] The above content is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A battery pack box, characterized in that: include: A first shell, the first shell comprising a bottom plate and a plurality of side plates connected to the bottom plate, the plurality of side plates and the bottom plate being an integrally formed structure and surrounding a receiving cavity; as well as A cooling plate is arranged in the accommodating cavity and connected to the bottom plate, and a cooling channel for circulating a coolant is formed between the cooling plate and the bottom plate.

2. The battery pack case according to claim 1, characterized in that: A groove is provided on a side surface of the bottom plate close to the accommodating cavity, and the cooling plate and the groove together form the cooling channel.

3. The battery pack case according to claim 1, characterized in that: The first shell is made of a fiber-reinforced composite material or an aluminum alloy, and the cooling plate is made of metal.

4. The battery pack case according to claim 3, characterized in that: When the first shell is made of a fiber-reinforced composite material, the cooling plate is bonded to the base plate via a first adhesive layer, and an orthographic projection of the first adhesive layer on the base plate does not overlap with an orthographic projection of the cooling channel on the base plate. When the first shell is made of aluminum alloy, the cooling plate is connected to the bottom plate by welding.

5. The battery pack case according to claim 1, characterized in that: The cooling plate is provided with a water inlet interface and a water outlet interface communicating with the cooling flow channel, and the first shell is provided with a first through hole and a second through hole; The battery pack case also includes a water inlet and a water outlet. One end of the water inlet is connected to the water inlet interface, and the other end extends out of the first shell through the first through hole. One end of the water outlet is connected to the water outlet interface, and the other end extends out of the first shell through the second through hole.

6. The battery pack case according to claim 1, characterized in that: The battery pack case further includes at least one first partition, the at least one first partition and the first shell are integrally formed, and the at least one first partition divides the accommodating cavity into a plurality of sub-accommodating cavities; The cooling plate includes a plurality of sub-cooling plates respectively located in the plurality of sub-accommodating cavities, and the cooling channel includes a plurality of sub-cooling channels formed by the plurality of sub-cooling plates and the bottom plate.

7. The battery pack case according to claim 6, characterized in that: There is one first partition, and the first partition divides the accommodating chamber into a first sub-accommodating chamber and a second sub-accommodating chamber; The cooling plate includes a first sub-cooling plate located in the first sub-accommodating cavity and a second sub-cooling plate located in the second sub-accommodating cavity, and the cooling channel includes a first sub-cooling channel formed by the first sub-cooling plate and the bottom plate, and a second sub-cooling channel formed by the second sub-cooling plate and the bottom plate; The first sub-cooling plate is provided with a first interface and a second interface communicating with the first sub-cooling channel, and the second sub-cooling plate is provided with a third interface and a fourth interface communicating with the second sub-cooling channel; The battery pack case also includes a connecting pipe assembly, which is connected to the first interface, the second interface, the third interface and the fourth interface. The connecting pipe assembly is configured to allow coolant to flow into the first sub-cooling channel and the second sub-cooling channel and to allow coolant to flow out of the first sub-cooling channel and the second sub-cooling channel. The connecting pipe assembly is also configured to connect the first sub-cooling channel and the second sub-cooling channel.

8. The battery pack case according to claim 1, characterized in that: At least a portion of a surface of one side of the plurality of side panels facing away from the accommodating cavity is provided with a recessed cavity, wherein a plurality of reinforcing ribs connected to the side panels are provided in the recessed cavity, and the plurality of reinforcing ribs are arranged in a mesh-like staggered manner; And / or, the battery pack case further includes a second shell and a bottom guard plate, the second shell is detachably connected to the first shell to seal the accommodating cavity, and the bottom guard plate is installed on the side of the bottom plate away from the cooling plate.

9. A battery pack, characterized in that: include: Battery; as well as The battery pack case according to any one of claims 1 to 8, wherein the battery is arranged in the accommodating cavity.

10. A vehicle, characterized in that: Comprising the battery pack as claimed in claim 9.

Images