Battery pack, power utilization device and energy storage device

Abstract

A battery pack, an electric device and an energy storage device, belonging to the technical field of batteries, the battery pack comprises a battery module (1) and a box body (2), the battery module (1) comprises at least two battery monomers (11), end plates (12) and a partition plate (13), the direction in which the at least two battery monomers (11) are arranged in sequence is a first direction, the end plates (12) are arranged on both sides of the partition plate (13) along the first direction, and the end plates (12) are arranged on both sides of the partition plate (13) along the second direction. A battery monomer (11) is arranged between the end plate (12) and the partition plate (13) on each side, the direction respectively intersected with the first direction and the vertical direction is a second direction, the battery module (1) is positioned in the box body (2), and the end plates (12) and the partition plates (13) are both mounted in the box body (2). The battery monomers (11) are clamped by the end plates (12) on the two sides and the corresponding partition plates (13), so that more battery monomers (11) can be clamped and arranged between the end plates (12) on the two sides of each battery module (1), and the number of modules in the battery pack can be reduced under approximately same conditions, so that the use of longitudinal beams and cross beams can be reduced or even eliminated, the structure of the battery pack is simplified, and the cost of the battery pack is reduced. And the volume density of the battery pack is improved.

Description

Battery pack, electric device and energy storage device TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pack, an electric device and an energy storage device. BACKGROUND

[0002] New energy batteries are increasingly widely used in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also increasingly used in the field of energy storage and the like.

[0003] In the related art, the volumetric energy density of the battery pack is low.

[0004] SUMMARY

[0005] To solve the above technical problems, the present application provides a battery pack, an electric device and an energy storage device to improve the volumetric energy density of the battery pack.

[0006] The embodiments of the present application are implemented by the following technical solutions.

[0007] The first aspect of the embodiments of the present application provides a battery pack, comprising:

[0008] A battery module comprising battery monomers, end plates and separators, the number of battery monomers is at least two, the direction of the arrangement of the at least two battery monomers is the first direction, the separators are provided with the end plates on both sides along the first direction, and the battery monomers are arranged between each side end plate and the separator, and the direction intersecting with the first direction and the up-down direction is the second direction.

[0009] A box body, the battery module is located in the box body, and the end plates and the separators are mounted on the box body.

[0010] In the scheme of the embodiments of the present application, the two side end plates and the corresponding separators clamp the battery monomers, so that more battery monomers can be clamped and arranged between the two side end plates of each battery module. Under approximately the same conditions, the number of modules in the battery pack is reduced, and the volumetric density of the battery pack is improved.

[0011] In an embodiment, the box body comprises a support main plate, a support edge plate and a main box, the support edge plate and the support main plate are connected to the main box, the support edge plate is connected to the end plate, and the support main plate is connected to the separator to support the battery module. There is a gap between the bottom of the end plate, the separator and the battery monomers and the main box.

[0012] In the embodiments of the present application, the support edge plate and the support main plate are arranged to facilitate the installation of the battery module, so as to avoid the gravity of the battery module directly falling on the main box, thereby protecting the main box. The gap between the bottom of the battery monomer and the main box is beneficial to fully utilize the gap of the bottom of the battery monomer to arrange the structure required to be in contact with the battery monomer.

[0013] In an embodiment, the battery module comprises a temperature regulating device, the temperature regulating device is at least partially located in the gap, and the temperature regulating device is connected with the end plate and the partition plate respectively.

[0014] In the embodiments of the present application, the temperature regulating device is connected with the end plate and the partition plate, so that the temperature regulating device is not restricted by the connection relationship of the bottom of the main box, and is beneficial to be close to the battery monomer, thereby achieving good temperature regulating effect.

[0015] In an embodiment, the temperature regulating device is a water cooling plate.

[0016] In the embodiments of the present application, the water cooling plate is beneficial to heat dissipation of the battery monomer, and maintains normal work of the battery monomer.

[0017] In an embodiment, the bottom of the battery monomer is glued to the water cooling plate.

[0018] In the embodiments of the present application, the water cooling plate and the battery monomer are firmly attached, which is beneficial to heat dissipation.

[0019] In an embodiment, the bottom of the water cooling plate and the main box surround a buffer space, and the buffer space is empty.

[0020] In the embodiments of the present application, the bottom of the water cooling plate and the main box surround a buffer space, which can buffer the impact force from the outside of the main box, thereby protecting the water cooling plate.

[0021] In an embodiment, the end plate comprises a vertical plate and a protruding structure, the water cooling plate is connected with the vertical plate, the protruding structure is connected with one side of the vertical plate away from the battery monomer, and the protruding structure is connected with the support edge plate.

[0022] In the embodiments of the present application, the end plate is staggered with the installation positions of the support edge plate and the water cooling plate, thereby facilitating the installation of the water cooling plate.

[0023] In an embodiment, the partition plate is provided with the support main plate at both ends along the second direction, the partition plate has an installation part between the support main plates, and the installation part is connected with the water cooling plate.

[0024] In the embodiments of the present application, the partition plate is connected with the support main plate at both ends, and the partition plate leaves an installation part, thereby facilitating the installation of the water cooling plate.

[0025] In an embodiment, the end plate and the partition plate are detachably connected with the box body, and the bottom of the battery monomer is arranged to be spaced apart from the box body.

[0026] In the embodiments of the present application, the battery module can be detached from the box as a whole, and the battery module can be replaced individually, thereby facilitating the repair of the battery pack.

[0027] In an embodiment, the battery pack comprises a protective coating, and the surface of the box is provided with the protective coating.

[0028] In the embodiments of the present application, the protective coating can protect the box from damage.

[0029] In an embodiment, the number of the battery modules is at least two, and all the battery modules are arranged along the second direction.

[0030] In the embodiments of the present application, the number of the battery modules is not limited, and all the battery modules are arranged along the second direction, thereby reducing or even eliminating the longitudinal beams and the transverse beams.

[0031] In an embodiment, the battery module comprises side plates, and the side plates are arranged on opposite sides of the end plates along the second direction, and the side plates on each side are connected to the end plates on the two sides, respectively, and the battery monomers are located in the space surrounded by the side plates and the end plates.

[0032] In the embodiments of the present application, the side plates and the end plates are connected to fix the battery monomers, increase the structural strength of the battery module, and improve the safety of the battery pack.

[0033] In an embodiment, the battery module comprises first binding belts and second binding belts, the first binding belts are connected to the end plates on the two sides above the battery module, the first binding belts are arranged at intervals along the second direction, the second binding belts are sleeved on the side edges of the battery module to fix the battery monomers, and the second binding belts are connected to the end plates on the two sides.

[0034] In the embodiments of the present application, the first binding belts and the second binding belts bind the battery monomers, so that the connection between the battery monomers is stable.

[0035] The second aspect of the embodiments of the present application provides a power utilization device, which comprises:

[0036] a main body;

[0037] any one of the above battery packs is installed on the main body.

[0038] The third aspect of the embodiments of the present application provides an energy storage device, which comprises:

[0039] an outer box;

[0040] any one of the above battery packs is installed on the outer box. Advantages

[0041] The battery pack of the embodiment of the present application is provided with end plates on both sides of the partition plate along the first direction, the partition plate is arranged between the two end plates, the battery monomer is arranged between each end plate and the partition plate, the battery monomer is clamped by each end plate and the partition plate to fix the battery monomer, the end plate, the partition plate and the battery monomer form an integral structure, the gravity of the battery monomer is transmitted to the end plate and the partition plate, and then transmitted to the box body by the partition plate, and the structure is stable. In each battery module, the battery monomer is clamped by the two end plates and the corresponding partition plates, so that more battery monomers can be clamped and arranged between the two end plates of each battery module, the number of modules in the battery pack can be reduced under the same conditions, thereby the use of longitudinal beams and cross beams can be reduced or even eliminated, the structure of the battery pack is simplified, and the volume density of the battery pack is improved. BRIEF DESCRIPTION OF DRAWINGS DETAILED DESCRIPTION OF THE INVENTION BRIEF DESCRIPTION OF DRAWINGS

[0042] FIG. 1 is a structural schematic diagram of a battery pack according to an embodiment of the present application, and part of the structure of a main box is shown in the figure;

[0043] FIG. 2 is a structural schematic diagram of a battery pack according to an embodiment of the present application, and a first direction and a second direction are shown in the figure;

[0044] FIG. 3 is a sectional view of A-A in FIG. 2;

[0045] FIG. 4 is an enlarged view of B in FIG. 3;

[0046] FIG. 5 is a structural schematic diagram of a battery pack according to an embodiment of the present application, and a first binding belt and a second binding belt are shown in the figure;

[0047] FIG. 6 is an exploded view of a battery pack according to an embodiment of the present application;

[0048] FIG. 7 is a structural schematic diagram of a battery module of a battery pack according to an embodiment of the present application;

[0049] FIG. 8 is an assembly view of a partition plate, a box body and a water-cooling plate according to an embodiment of the present application, and the size of a buffer space is exaggerated in the figure for clarity;

[0050] FIG. 9 is a structural schematic diagram of a temperature regulating device of a battery pack according to an embodiment of the present application.

[0051] BRIEF DESCRIPTION OF DRAWINGS 1, battery module; 11, battery monomer; 12, end plate; 121, vertical plate; 122, protruding structure; 13, partition plate; 131, mounting portion; 14, side plate; 15, first binding belt; 16, second binding belt; 17, temperature regulating device; 2, box body; 21, main box; 22, support edge plate; 23, support main plate; 3, buffer space. DETAILED DESCRIPTION DETAILED DESCRIPTION

[0052] The embodiments of the present application will be described in detail below with reference to the drawings. The following examples are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, but cannot be used to limit the protection scope of the present application.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "comprising," "comprises" and "including" as well as their conjugates, are intended to cover a non-exclusive inclusion.

[0054] In the description of the embodiments of the present application, the technical terms "first", "second", "third" and the like are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0055] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0056] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents the "or" relationship between the front and rear associated objects.

[0057] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0058] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical term "contact" should be understood in a broad sense, which can be direct contact or contact through an intermediate medium layer, and can be contact between two objects in contact without interaction force or contact between two objects in contact with interaction force.

[0059] In the related art, a battery pack is composed of a battery module 1, the battery module 1 is composed of at least two battery monomers 11, and a traditional battery pack uses longitudinal beams and cross beams to support the battery module 1. The longitudinal beam and cross beam structure inside the battery pack is complex, which will occupy the space inside the battery pack and reduce the volume utilization rate of the battery pack.

[0060] The battery pack provided in the embodiments of the present application can reduce or even eliminate the use of longitudinal beams and cross beams, simplify the structure of the battery pack, and improve the volume energy density of the battery pack.

[0061] The battery pack of the embodiments of the present application can be applied to an electric device and an energy storage device.

[0062] The electric device is a device that uses electric energy as energy and realizes corresponding functions by consuming electric energy. Exemplarily, the electric device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc., and the spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0063] The electric device of the embodiments of the present application can include a main body and the battery pack of any embodiment, and the battery pack is installed on the main body.

[0064] The battery pack of the electric device is used to supply power to the main body.

[0065] The main body refers to a main structure that consumes electric energy to realize corresponding functions. For example, the electric device can be a mobile phone, and the main body is a part that can realize functions such as communication, which is supplied with power by the battery pack. For example, the electric device can be a car, and the main body is a part that can provide people with seats and can travel on roads, which is supplied with power by the battery pack.

[0066] Taking the electric device of an embodiment of the present application as a vehicle as an example for description.

[0067] An embodiment of the present application provides a vehicle, which can be a fuel automobile, a gas automobile or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid automobile or a range extended automobile. The vehicle is internally provided with a battery pack, which can be arranged at the bottom, the head or the tail of the vehicle. The battery pack can be used for power supply of the vehicle, for example, the battery pack can be used as an operating power supply of the vehicle. The vehicle can further include a controller and a motor, and the controller can be used to control the battery pack to supply power to the motor. For example, the battery pack can be used for the working power demand of the vehicle during starting, navigation and driving.

[0068] In some embodiments of the present application, the battery pack can not only be used as an operating power supply of the vehicle, but also be used as a driving power supply of the vehicle, to replace or partially replace fuel or natural gas to provide driving power for the vehicle.

[0069] The present application further provides an energy storage device, which includes an outer box and the battery pack of any embodiment.

[0070] The outer box is a container for containing objects, and most parts of the energy storage device are arranged in the outer box.

[0071] The battery pack of the present application, please refer to FIG. 1-9, including battery module 1 and box 2, battery module 1 includes battery monomer 11, end plate 12 and partition plate 13, the number of battery monomer 11 is at least two, the direction of the battery monomer 11 arranged in turn is the first direction, the partition plate 13 is provided with end plate 12 on both sides along the first direction, and there is battery monomer 11 between each side end plate 12 and the partition plate 13, the direction intersecting with the first direction and the up-down direction is the second direction, the battery module 1 is located in the box 2, and the end plate 12 and the partition plate 13 are installed in the box 2.

[0072] The battery monomer 11 refers to a basic unit capable of realizing mutual conversion between chemical energy and electrical energy.

[0073] The battery monomer 11 can be a secondary battery, which refers to a battery monomer 11 that can be activated by charging after discharging.

[0074] The battery monomer 11 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the present application.

[0075] The number of battery monomers 11 is at least two, and at least two battery monomers 11 can be connected in series or in parallel or in a mixed connection, and the mixed connection means that at least two battery monomers 11 are connected in series and in parallel. At least two battery monomers 11 can be connected in series or in parallel or in a mixed connection to form a battery module 1, and at least two battery modules 1 are connected in series or in parallel or in a mixed connection to form a whole, and at least two battery modules 1 connected in series or in parallel or in a mixed connection are placed in the box 2. The battery pack can also include other structures, for example, the battery pack can also include a busbar component for realizing the electrical connection between at least two battery monomers 11.

[0076] Exemplarily, the battery monomer 11 can be a cylindrical battery monomer, a prismatic battery monomer, a soft package battery monomer or other shaped battery monomers, and the prismatic battery monomer includes a square cell, a blade-shaped battery monomer, a multi-prismatic battery, for example, a hexagonal prism battery, etc., which is not particularly limited in the present application.

[0077] For the convenience of description, a first direction and a second direction are set, and the first direction, the second direction and the up-down direction are directions intersecting with each other, the first direction intersects with the second direction, the first direction intersects with the up-down direction, and the second direction intersects with the up-down direction. For the convenience of description, as shown by arrows in FIG. 2 and FIG. 3, the direction of arrow X is the first direction, the direction of arrow Y is the second direction, and the direction of arrow Z is the up-down direction.

[0078] Exemplarily, the intersection includes perpendicular intersection, the first direction and the second direction are perpendicular to each other, the first direction and the up-down direction are perpendicular to each other, and the second direction and the up-down direction are perpendicular to each other.

[0079] The end plate 12 is a structure with a certain wall thickness, and the end plate 12 can be connected with the battery monomer 11.

[0080] The partition plate 13 is a structure with a certain wall thickness, and the partition plate 13 can be connected with the battery monomer 11.

[0081] The box 2 refers to a structure with a containing space, and the battery module 1 is located in the box 2, and the battery module 1 is contained by the box 2 to form a certain protection, and reduce the risk of being damaged by being exposed to the outside.

[0082] Exemplarily, the material of the box 2 can be a metal material.

[0083] Exemplarily, the material of the box 2 can be a plastic material.

[0084] Exemplarily, the box 2 can be sealed.

[0085] The battery pack of the embodiment of the application is provided with the end plate 12 on both sides of the baffle 13 along the first direction, the baffle 13 is arranged between the two end plates 12, there is the battery monomer 11 between each end plate 12 and the baffle 13, the battery monomer 11 is clamped and fixed by each end plate 12 and the baffle 13, the end plate 12, the baffle 13 and the battery monomer 11 form an integral structure, the gravity of the battery monomer 11 is transmitted to the end plate 12 and the baffle 13, and then transmitted to the box 2 by the baffle 13, and the structure is stable. In each battery module 1, the battery monomer 11 is clamped by the two end plates 12 and the corresponding baffles, so that more battery monomers 11 can be clamped and arranged between the two end plates 12 of each battery module 1, which is beneficial to reducing the number of modules in the battery pack under the same conditions, so as to reduce or even eliminate the use of longitudinal beams and cross beams, simplify the structure of the battery pack, and improve the volume density of the battery pack.

[0086] In an embodiment, referring to FIGS. 1-6, the box 2 includes a support main plate 23, a support edge plate 22 and a main box 21, the support edge plate 22 and the support main plate 23 are connected to the main box 21, the support edge plate 22 is connected to the end plate 12, and the support main plate 23 is connected to the baffle 13 to support the battery module 1, and there is a gap between the bottom of the end plate 12, the baffle 13 and the battery monomer 11 and the main box 21.

[0087] The main box 21 refers to a structure with a certain wall thickness outside the battery pack, and the structural components of the battery pack are located inside the main box 21.

[0088] The support main plate 23 is a structure with a certain thickness in the direction of gravity and can bear pressure.

[0089] The support edge plate 22 is a structure with a certain thickness in the direction of gravity and can bear pressure.

[0090] Exemplarily, the support edge plate 22 and the support main plate 23 are welded on the main box 21.

[0091] Exemplarily, the support edge plate 22 and the support main plate 23 are integrally formed with the main box 21.

[0092] Exemplarily, the support main plate 23 and the support edge plate 22 can be a cuboid.

[0093] Exemplarily, the support main plate 23 and the support edge plate 22 can be a hollow structure or a solid structure.

[0094] In the embodiments of the present application, the gravity of the battery module 1 is first transmitted to the support edge plate 22 and the support middle plate, and then transmitted to the main box 21 by the support edge plate 22 and the support middle plate, thereby avoiding the gravity of the battery module 1 directly falling on the main box 21, and playing a role of protecting the main box 21. By arranging a gap between the bottom of the battery monomer 11 and the main box 21, the bottom of the battery monomer 11 in the main box 21 is exposed to the gap, which is beneficial to fully utilizing the gap of the bottom of the battery monomer 11 to arrange a structure needed to be in contact with the battery monomer 11.

[0095] It can be understood that the structure of the box body 2 is not limited. In an embodiment, the box body 2 can not be provided with the support edge plate 22 and the support main plate 23, and the end plate 12, the partition plate 13 and the battery monomer 11 of the battery module 1 are directly connected with the main box 21.

[0096] In an embodiment, referring to FIGS. 1-9, the battery module 1 comprises a temperature adjusting device 17, the temperature adjusting device 17 is at least partially located in the gap, and the temperature adjusting device 17 is connected with the end plate 12 and the partition plate 13 respectively.

[0097] The temperature adjusting device 17 can adjust the temperature of the battery monomer 11.

[0098] For example, the temperature of the battery monomer 11 is high, which affects the normal work of the battery monomer 11, and the temperature adjusting device 17 can cool the battery monomer 11.

[0099] For example, the temperature of the battery monomer 11 is low, which affects the normal work of the battery monomer 11, and the temperature adjusting device 17 can heat the battery monomer 11.

[0100] In the embodiments of the present application, the temperature adjusting device 17 is connected with the end plate 12 and the partition plate 13, so that the temperature adjusting device 17 is not restricted by the connection relationship of the bottom of the main box 21, which is beneficial to the temperature adjusting device 17 being close to the battery monomer 11, and the temperature adjusting effect is good.

[0101] It can be understood that the position of the temperature adjusting device 17 is not limited. For example, the temperature adjusting device 17 can be arranged on the upper side of the battery module 1.

[0102] In an embodiment, the temperature adjusting device 17 is a water cooling plate.

[0103] The water cooling plate is a component for exchanging heat through liquid cooling, and the heat dissipation principle thereof is that a flow channel is formed in a metal plate, a component is installed on the surface of the water cooling plate, a heat conduction medium is coated in the middle, and the cooling liquid in the inside enters from the inlet of the plate and then takes away the heat of the component from the outlet.

[0104] In the embodiments of the present application, during the use of the battery pack, the battery monomer 11 generates heat due to the reaction inside the battery monomer 11, the temperature affects the normal work of the battery monomer 11, and the water cooling plate is helpful for heat dissipation of the battery monomer 11, thereby maintaining the normal work of the battery monomer 11.

[0105] It can be understood that the temperature regulating device 17 is not limited to the water-cooled plate. In an embodiment, the temperature regulating device 17 is an air-cooled system.

[0106] In an embodiment, referring to FIGS. 3 and 4, the bottom of the battery monomer 11 is glued to the water-cooled plate.

[0107] In the embodiment of the present application, the bottom of the battery monomer 11 is glued to the water-cooled plate, which increases the installation area, makes the installation of the water-cooled plate stable, and firmly adheres to facilitate heat dissipation.

[0108] It can be understood that the water-cooled plate and the bottom of the battery monomer 11 are not limited to gluing. In an embodiment, the water-cooled plate and the bottom of the battery monomer 11 are spaced apart.

[0109] In an embodiment, referring to FIGS. 3 and 4, the bottom of the water-cooled plate and the main box 21 surround the buffer space 3, and the buffer space 3 is empty.

[0110] In the embodiment of the present application, the bottom of the battery module 1 and the main box 21 have a gap, the water-cooled plate is connected to the bottom of the battery module 1, the bottom of the water-cooled plate and the main box 21 surround the buffer space 3, which can buffer the impact force from the outside of the main box 21 and protect the water-cooled plate.

[0111] It can be understood that the battery pack is not limited to setting the buffer space 3. In an embodiment, the bottom of the water-cooled plate directly contacts the main box 21.

[0112] In an embodiment, referring to FIGS. 1-9, the end plate 12 includes a vertical plate 121 and a protruding structure 122, the water-cooled plate is connected to the vertical plate 121, the protruding structure 122 is connected to the side of the vertical plate 121 away from the battery monomer 11, and the protruding structure 122 is connected to the support edge plate 22.

[0113] In the embodiment of the present application, the battery monomer 11 closest to the end plate 12 is connected to the side of the vertical plate 121 in the first direction, the bottom surface of the vertical plate 121 has a gap with the main box 21, the water-cooled plate is connected to the bottom surface of the vertical plate 121, the protruding structure 122 is connected to the support edge plate 22 on the side of the vertical plate 121 away from the battery monomer 11, and the support edge plate 22 and the water-cooled plate are staggered, facilitating the installation of the water-cooled plate and the vertical plate 121.

[0114] It can be understood that the structure of the end plate 12 is not limited. In an embodiment, the end plate 12 is not provided with the protruding structure 122, and the lower side of the end plate 12 is connected to the support edge plate 22 and the water-cooled plate.

[0115] In an embodiment, referring to FIG. 3, the partition plate 13 is provided with a support main plate 23 at both ends in the second direction, the partition plate 13 has a mounting portion 131 located between the support main plates 23, and the mounting portion 131 is connected to the water-cooled plate.

[0116] In the embodiment of the present application, the baffle 13 is connected to the support main plate 23 at both ends, the support main plate 23 avoids the water-cooled plate, the spacing between the support main plates 23 at both ends can at least allow the water-cooled plate to pass through, the baffle 13 leaves the mounting portion 131, and the water-cooled plate is conveniently mounted.

[0117] It can be understood that the support main plate 23 is not limited in position. In an embodiment, the support main plate 23 can be arranged at one end of the baffle 13, and the mounting portion 131 is arranged at the other end of the baffle 13.

[0118] In an embodiment, referring to FIGS. 1-6, the end plate 12 and the baffle 13 are detachably connected to the box 2, and the bottom of the battery monomer 11 is arranged spaced apart from the box 2.

[0119] Exemplarily, the end plate 12 is connected to the box 2 through bolts.

[0120] Exemplarily, the baffle 13 is connected to the box 2 through bolts.

[0121] Exemplarily, the end plate 12 is clamped to the box 2.

[0122] Exemplarily, the baffle 13 is clamped to the box 2.

[0123] Exemplarily, after the end plate 12 and the baffle 13 are detached from the box 2, the end plate 12, the baffle 13, the battery monomer 11 and the water-cooled plate are detached from the box 2 together.

[0124] In the embodiment of the present application, the battery module 1 can be integrally detached from the box 2, the battery module 1 can be replaced alone, and the battery pack is conveniently repaired.

[0125] In an embodiment, the end plate 12 is detachably connected to the support edge plate 22, and the baffle 13 is detachably connected to the support main plate 23.

[0126] In an embodiment, the battery pack includes a protective coating, and the box 2 is provided with the protective coating on the surface.

[0127] Exemplarily, the protective coating is an anti-corrosion coating.

[0128] Exemplarily, the protective coating is a fireproof coating.

[0129] Exemplarily, the protective coating is an insulating coating.

[0130] In the embodiment of the present application, the inner surface and the outer surface of the box 2 are provided with the protective coating, which can protect the box 2, prevent the external environment from damaging the box 2, and also prevent the battery module 1 from damaging the box 2.

[0131] In an embodiment, referring to FIGS. 1-8, the number of battery modules 1 is at least two, and all the battery modules 1 are arranged along the second direction.

[0132] In the embodiments of the present application, the battery module 1 can arrange as many battery monomers 11 as possible along the first direction, and all the battery modules 1 are arranged along the second direction, so as to reduce or even eliminate the use of longitudinal beams and transverse beams.

[0133] For example, the number of the battery module 1 can be 2, 3 or 4.

[0134] It can be understood that the arrangement direction of the battery module 1 is not limited. In an embodiment, the battery module 1 is arranged along the arrangement direction of the battery monomer 11.

[0135] In an embodiment, referring to FIGS. 1 and 2, the battery module 1 includes side plates 14, and the end plates 12 are provided with the side plates 14 on opposite sides along the second direction, and each side plate 14 is connected with the end plates 12 on both sides, and the battery monomer 11 is located in the space surrounded by the side plates 14 and the end plates 12.

[0136] In the embodiments of the present application, the two side plates 14 and the two end plates 12 are connected to fix the battery monomer 11 in the space surrounded by the side plates 14 and the end plates 12, so as to enhance the overall rigidity of the battery module 1 and improve the safety of the battery pack.

[0137] It can be understood that the battery module 1 can not be provided with the side plates 14 as appropriate.

[0138] In an embodiment, referring to FIG. 5, the battery module 1 includes first binding belts 15 and second binding belts 16, the first binding belts 15 are connected with the end plates 12 on both sides above the battery module 1, the first binding belts 15 are arranged at intervals along the second direction, the second binding belts 16 are sleeved on the side edges of the battery module 1 to fix the battery monomer 11, and the second binding belts 16 are connected with the end plates 12 on both sides.

[0139] For example, the first binding belts 15 and the second binding belts 16 are made of plastic material.

[0140] For example, the first binding belts 15 and the second binding belts 16 are made of stainless steel material.

[0141] It needs to be explained that the second binding belts 16 are arranged along the upward and downward projection direction of the battery module 1, and the second binding belts 16 surround the battery module 1 once to bundle the entire battery module 1.

[0142] In the embodiments of the present application, the first binding belts 15 and the second binding belts 16 bind the battery monomer 11, so that the battery monomer 11 is installed stably, and in the use process of the battery pack, the battery monomer 11 can produce swelling deformation along the first direction, and the first binding belts 15 and the second binding belts 16 can withstand the pressure caused by the deformation of the battery monomer 11 to the end plates 12, so as to protect the battery module 1.

[0143] It can be understood that the battery module 1 can not be provided with the second binding belts 16 and the first binding belts 15 as appropriate.

[0144] In an embodiment, referring to FIGS. 1-9, the number of battery monomers 11 is at least two, the direction in which the at least two battery monomers 11 are arranged in sequence is the first direction, the end plates 12 are arranged on both sides of the partition plates 13 along the first direction, there are battery monomers 11 between each side end plate 12 and the partition plate 13, the second direction intersects the first direction, the battery module 1 is located in the box 2, and the end plates 12 and the partition plates 13 are both mounted on the box 2. The support edge plate 22 and the support main plate 23 are both connected to the main box 21, the support edge plate 22 is connected to the end plate 12, the support main plate 23 is connected to the partition plate 13, to support the battery module 1, and there is a gap between the bottom of the partition plate 13, the end plate 12, and the battery monomer 11 and the main box 21. The battery module 1 includes a water-cooled plate, and the water-cooled plate is at least partially located in the gap, and the water-cooled plate is connected to the end plate 12 and the partition plate 13, respectively. The bottom of the water-cooled plate and the main box 21 enclose a buffer space 3. The water-cooled plate is connected to the vertical plate 121, the protruding structure 122 is connected to the side of the vertical plate 121 away from the battery monomer 11, and the protruding structure 122 is connected to the support edge plate 22. The partition plate 13 has support main plates 23 arranged at both ends along the second direction, and the partition plate 13 has a mounting portion 131 located between the support main plates 23, and the mounting portion 131 is connected to the water-cooled plate. The end plate 12 and the partition plate 13 are both detachably connected to the box 2, and the bottom of the battery monomer 11 is arranged apart from the box 2. The surface of the box 2 is provided with a protective coating. All the battery modules 1 are arranged along the second direction. The first binding belt 15 is connected to the end plates 12 on both sides above the battery module 1, the first binding belt 15 is arranged apart along the second direction, and the second binding belt 16 is sleeved on the side of the battery module 1 to fix the battery monomer 11, and the second binding belt 16 is connected to the end plates 12 on both sides. The battery pack cancels the longitudinal beam and the cross beam, the end plate 12 and the partition plate 13 are connected to the box 2 to support the battery module 1, the cost is reduced, the volume energy density of the battery pack is improved, the battery module 1 is detachable, the battery pack can be repaired, the lower part of the box 2 directly serves as the bottom protective plate of the battery module 1, there is a gap between the bottom of the battery module 1 and the box 2, the foam is cancelled, the cost is reduced, and the cost of the first binding belt 15 and the second binding belt 16 restraining the battery monomer 11 is reduced.

[0145] Exemplarily, the battery module 1 is provided with a side plate 14 instead of the second binding belt 16 and the first binding belt 15, and the end plate 12 is provided with a side plate 14 on opposite sides along the second direction. Each side plate 14 is connected to the end plate 12 on both sides, respectively, and the battery monomer 11 is located in the space enclosed by the side plate 14 and the end plate 12.

[0146] In an embodiment, referring to FIGS. 1 and 2, each battery module 1 is provided with a support edge plate 22 on opposite sides along the first direction, and each battery module 1 is correspondingly provided with a support main plate 23.

[0147] In one embodiment, referring to FIG. 1 and FIG. 2, the support side plates 22 in each battery module 1 are arranged along the second direction at intervals. The support main plates 23 of each battery module 1 are arranged along the second direction at intervals.

[0148] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limit the present application; although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some or all of the technical features thereof can be replaced equivalently; and these modifications or replacements do not cause the nature of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application, and they should be included in the scope of the present application. In particular, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the present application.

Claims

1. A battery pack comprising: A battery module comprising a battery cell, an end plate, and a separator, wherein the number of the battery cells is at least two, the direction in which the at least two battery cells are arranged in sequence is a first direction, the end plates are provided on both sides of the separator along the first direction, the battery cell is located between the end plate on each side and the separator, and the direction intersecting the first direction and the up-down direction is a second direction; The battery module is located in the box, and the end plate and the partition are both installed in the box.

2. The battery pack according to claim 1, wherein the box body comprises a supporting main board, supporting side plates and a main box, the supporting side plates and the supporting main board are both connected to the main box, the supporting side plates are connected to the end plates, and the supporting main board is connected to the partition to support the battery module, and there is a gap between the end plates, the partitions and the bottom of the battery cells and the main box. 3 . The battery pack according to claim 2 , wherein the battery module further comprises a temperature regulating device, wherein the temperature regulating device is at least partially located in the gap, and the temperature regulating device is respectively connected to the end plate and the partition. The battery pack according to claim 3 , wherein the temperature regulating device is a water cooling plate. 5 . The battery pack according to claim 4 , wherein the bottom of the battery cell is glued to the water cooling plate. 6 . The battery pack according to claim 4 , wherein the bottom of the water-cooling plate and the main box form a buffer space, and the buffer space is vacant.

7. The battery pack according to any one of claims 4 to 6, wherein the end plate comprises a vertical plate and a protrusion structure, the water cooling plate is connected to the vertical plate, the protrusion structure is connected to a side of the vertical plate away from the battery cell, and the protrusion structure is connected to the supporting side plate.

8. The battery pack according to any one of claims 4 to 7, wherein the supporting main boards are respectively provided at both ends of the partition along the second direction, the partition has a mounting portion located between the supporting main boards, and the mounting portion is connected to the water cooling plate. 9 . The battery pack according to claim 1 , wherein the end plates and the partitions are detachably connected to the box, and the bottoms of the battery cells are spaced apart from the box. 10 . The battery pack according to claim 1 , comprising a protective coating, wherein the protective coating is provided on the surface of the box. 11 . The battery pack according to claim 1 , wherein the number of the battery modules is at least two, and all the battery modules are arranged along the second direction.

12. The battery pack according to any one of claims 1 to 11, wherein the battery module includes side plates, and the side plates are provided on opposite sides of the end plates along the second direction, and the side plates on each side are respectively connected to the end plates on both sides, and the battery cells are located in the space enclosed by the side plates and the end plates.

13. The battery pack according to any one of claims 1 to 12, wherein the battery module comprises a first strap and a second strap, the first strap being connected to the end plates on both sides above the battery module, the first straps being arranged at intervals along the second direction, the second strap being sleeved on the side of the battery module to fix the battery cell, and the second strap being connected to the end plates on both sides.

14. An electrical device comprising: main body; The battery pack according to any one of claims 1 to 13, mounted on the main body.

15. An energy storage device comprising: outer box; The battery pack according to any one of claims 1 to 13, mounted in the outer box.

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