Battery pack, power utilization device and energy storage device

Abstract

The utility model discloses a battery pack, a power utilization device and an energy storage device, and belongs to the technical field of batteries, the battery pack comprises a battery module and a box body, the battery module comprises at least two battery monomers, an end plate and a partition plate, the at least two battery monomers are sequentially arranged in a first direction, and the end plate is arranged in a second direction; end plates are arranged on the two sides of the partition plate in the first direction, single batteries are arranged between the end plate on each side and the partition plate, the direction intersecting with the first direction and the vertical direction is the second direction, the battery module is located in the box body, and the end plates and the partition plate are installed in the box body. The battery monomers are clamped by the end plates on the two sides and the corresponding partition plates, so that more battery monomers can be clamped and arranged between the end plates on the two sides of each battery module, 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 is reduced. And the volume density of the battery pack is improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery pack, an electrical device and an energy storage device. Background Art

[0002] New energy batteries are being used more and more widely in life and industry. For example, new energy vehicles equipped with batteries have been widely used. In addition, batteries are also being increasingly used in areas such as energy storage.

[0003] In the related art, the volume energy density of the battery pack is low. Utility Model Content

[0004] In order to solve the above technical problems, the embodiments of the present application provide a battery pack, an electrical device and an energy storage device to improve the volume energy density of the battery pack.

[0005] The embodiments of the present application are implemented through the following technical solutions.

[0006] A first aspect of an embodiment of the present application provides a battery pack, comprising:

[0007] A battery module, comprising a battery cell, an end plate and a partition, 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 partition is provided with the end plates on both sides along the first direction, the battery cell is provided between the end plate on each side and the partition, and the direction intersecting the first direction and the up-down direction respectively is a second direction;

[0008] A box body, the battery module is located in the box body, and the end plate and the partition are both installed on the box body.

[0009] In the solution of the embodiment of the present application, the end plates on both sides and the corresponding partitions clamp the battery cells, so that more battery cells can be clamped and arranged between the end plates on both sides of each battery module. Under roughly the same conditions, it is beneficial to reduce the number of modules in the battery pack and improve the volume density of the battery pack.

[0010] In one embodiment, the box body includes a supporting main board, a supporting side plate and a main box, the supporting side plate and the supporting main board are both connected to the main box, the supporting side plate is connected to the end plate, and the supporting main board is connected to the partition to support the battery module, and there is a gap between the end plate, the partition and the bottom of the battery cell and the main box.

[0011] In the embodiment of the present application, the supporting side plates and the supporting main board are provided to facilitate the installation of the battery module, prevent the gravity of the battery module from falling directly on the main box, and protect the main box. By leaving a gap between the bottom of the battery cell and the main box, it is helpful to make full use of the gap at the bottom of the battery cell to arrange the structure that needs to contact the battery cell.

[0012] In one embodiment, the battery module further includes a temperature regulating device, which is at least partially located in the gap, and is connected to the end plate and the partition respectively.

[0013] In the embodiment of the present application, the temperature control device is connected by the end plate and the partition, so that the temperature control device is not constrained by the connection relationship at the bottom of the main box, which is conducive to the temperature control device being close to the battery cell and having a good temperature control effect.

[0014] In one embodiment, the temperature control device is a water cooling plate.

[0015] In the embodiment of the present application, the water cooling plate helps to dissipate heat from the battery cells and maintain normal operation of the battery cells.

[0016] In one embodiment, the bottom of the battery cell is glued to the water cooling plate.

[0017] In the embodiment of the present application, the water cooling plate and the battery cell are firmly attached to each other, which is beneficial to heat dissipation.

[0018] In one embodiment, the bottom of the water cooling plate and the main box are surrounded by a buffer space, and the buffer space is empty.

[0019] In the embodiment of the present application, the bottom of the water cooling plate and the main box are arranged to form a buffer space, which can buffer the impact force outside the main box and protect the water cooling plate.

[0020] In one embodiment, the end plate includes 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.

[0021] In the embodiment of the present application, the installation positions of the end plate, the supporting side plate and the water-cooling plate are staggered to facilitate the installation of the water-cooling plate.

[0022] In one embodiment, the supporting main boards are respectively provided at both ends of the partition along the second direction, and the partition has a mounting portion located between the supporting main boards, and the mounting portion is connected to the water cooling plate.

[0023] In the embodiment of the present application, both ends of the partition are connected to support the main board, and the partition leaves an installation portion to facilitate the installation of the water cooling plate.

[0024] In one embodiment, the end plate and the partition are both detachably connected to the box body, and the bottom of the battery cell is spaced apart from the box body.

[0025] In the embodiment of the present application, the battery module can be removed from the box as a whole, and the battery module can be replaced individually, which is convenient for the battery pack to be repaired.

[0026] In one embodiment, the battery pack includes a protective coating, and the protective coating is disposed on the surface of the box.

[0027] In the embodiment of the present application, the protective coating can protect the box body and prevent the box body from being damaged.

[0028] In one embodiment, the number of the battery modules is at least two, and all the battery modules are arranged along the second direction.

[0029] In the embodiment of the present application, the number of battery modules is not limited, and all battery modules are arranged along the second direction, which can reduce or even eliminate longitudinal beams and transverse beams.

[0030] In one embodiment, the battery module includes side plates, and the side plates are arranged on opposite sides of the end plates along the second direction, and each side of the side plate is respectively connected to the end plates on both sides, and the battery cell is located in the space enclosed by the side plates and the end plates.

[0031] In the embodiment of the present application, the side plates and the end plates are connected to fix the battery cells, thereby increasing the structural strength of the battery module and improving the safety of the battery pack.

[0032] In one embodiment, the battery module includes a first strap and a second strap, the first strap is connected to the end plates on both sides above the battery module, the first strap is arranged at intervals along the second direction, the second strap is sleeved on the side of the battery module to fix the battery cell, and the second strap is connected to the end plates on both sides.

[0033] In the embodiment of the present application, the first binding strap and the second binding strap bind the battery cells to ensure a stable connection between the battery cells.

[0034] A second aspect of an embodiment of the present application provides an electrical device, including:

[0035] main body;

[0036] Any of the above-mentioned battery packs is installed in the main body.

[0037] A third aspect of an embodiment of the present application provides an energy storage device, comprising:

[0038] outer box;

[0039] Any of the above-mentioned battery packs is installed in the outer box.

[0040] Utility Model Effect

[0041] The battery pack of the embodiment of the present application is provided with end plates on both sides along the first direction through the partition, and the partition is provided between the end plates on both sides, and the battery cells are provided between the end plates on each side and the partition, and the end plates and partitions on each side clamp the battery cells to fix the battery cells, and the end plates, partitions and battery cells form an integral structure, and the gravity of the battery cells is transferred to the end plates and partitions, and then transferred to the box body by the partitions, so that the structure is stable. In each battery module, the battery cells are clamped by the end plates on both sides and the corresponding partitions, so that more battery cells can be clamped and arranged between the end plates on both sides of each battery module, which is conducive to reducing the number of modules in the battery pack under roughly the same conditions, thereby reducing or even eliminating the use of longitudinal beams and cross beams, simplifying the structure of the battery pack, and improving the volume density of the battery pack. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0043] Figure 1 This is a schematic diagram of the structure of a battery pack according to an embodiment of the present application, showing a partial structure of a main box;

[0044] Figure 2 This is a schematic diagram of the structure of a battery pack according to an embodiment of the present application, showing a first direction and a second direction;

[0045] Figure 3 for Figure 2 Sectional view at AA in the middle;

[0046] Figure 4 for Figure 3 Magnified view at B in the middle;

[0047] Figure 5 This is a schematic diagram of the structure of a battery pack according to an embodiment of the present application, showing a first binding strap and a second binding strap;

[0048] Figure 6 An exploded view of a battery pack according to an embodiment of the present application;

[0049] Figure 7 A schematic diagram of the structure of a battery module of a battery pack according to an embodiment of the present application;

[0050] Figure 8 This is an assembly diagram of the partition, the box body and the water-cooling plate in the embodiment of the present application. For the sake of clarity, the size of the buffer space is exaggerated in the figure;

[0051] Fig. 9Schematic diagram of the structure of the temperature control device of the battery pack according to the embodiment of the present application.

[0052] Description of Reference Numerals

[0053] 1. Battery module; 11. Battery cell; 12. End plate; 121. Vertical plate; 122. Protruding structure; 13. Partition plate; 131. Mounting part; 14. Side plate; 15. First strap; 16. Second strap; 17. Temperature control device; 2. Box body; 21. Main box; 22. Support side plate; 23. Support main board; 3. Buffer space. DETAILED DESCRIPTION

[0054] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the embodiments of this application and any variations thereof are intended to cover non-exclusive inclusions.

[0056] In the description of the embodiments of the present application, the technical terms "first", "second", "third", etc. 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 "multiple" is more than two, unless otherwise clearly and specifically defined.

[0057] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0058] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0059] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0060] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, the technical term "contact" should be understood in a broad sense, and may be direct contact or contact through an intermediate medium layer. It may be contact with essentially no interaction force between the two contacting parties, or it may be contact with interaction force between the two contacting parties.

[0061] In the related art, a battery pack is composed of a battery module 1, and the battery module 1 is composed of at least two battery cells 11. A conventional battery pack uses longitudinal beams and transverse beams to support the battery module 1. The longitudinal beams and transverse beams inside the battery pack have a complex structure, which will occupy the space inside the battery pack and reduce the volume utilization of the battery pack.

[0062] An embodiment of the present application provides a battery pack, in which a battery module 1 of the battery pack is clamped and fixed with a battery cell 11 by an end plate 12 and a partition 13, and both the end plate 12 and the partition 13 are connected to a box body 2 of the battery pack, thereby fixing the battery module 1 in the box body 2, which 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.

[0063] The battery pack according to the embodiment of the present application can be applied to power-consuming devices and energy storage devices.

[0064] An electric device is a device that uses electric energy as energy and realizes corresponding functions by consuming electric energy. For example, the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0065] The electric device of the embodiment of the present application may include a main body and a battery pack of any embodiment, wherein the battery pack is installed on the main body.

[0066] The battery pack of the power-consuming device is used to supply power to the main body.

[0067] The main body refers to the main structure that consumes electric energy to achieve the corresponding function. For example, the power-consuming device can be a mobile phone, and the main body is the part that can achieve functions such as communication, and the battery pack supplies power to the part that can achieve functions such as communication. For example, the power-consuming device can be a car, and the main body is the part that can be used for people to sit and can be driven on the road, and the battery pack supplies power to the part that can be used for people to sit and can be driven on the road.

[0068] The electrical device of an embodiment of the present application is taken as an example of a vehicle.

[0069] The vehicle provided in one embodiment of the present application may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery pack is provided inside the vehicle, and the battery pack may be provided at the bottom, head or tail of the vehicle. The battery pack may be used to power the vehicle, for example, the battery pack may be used as an operating power source for the vehicle. The vehicle may also include a controller and a motor, and the controller may be used to control the battery pack to power the motor. For example, the battery pack may be used for starting, navigating and operating power requirements of the vehicle during driving.

[0070] In some embodiments of the present application, the battery pack can be used not only as the operating power source of the vehicle, but also as the driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0071] An embodiment of the present application further provides an energy storage device, which includes an outer box and a battery pack according to any one of the embodiments, wherein the battery pack is installed in the outer box.

[0072] The outer box is a container for containing objects, and most of the components of the energy storage device are arranged in the outer box.

[0073] For the battery pack of the present application embodiment, please refer to Figures 1 to 9 , including a battery module 1 and a box body 2, the battery module 1 includes a battery cell 11, an end plate 12 and a partition 13, the number of the battery cell 11 is at least two, the direction in which the at least two battery cells 11 are arranged in sequence is a first direction, the partition 13 is provided with an end plate 12 on both sides along the first direction, and there is a battery cell 11 between the end plate 12 and the partition 13 on each side, and the direction intersecting the first direction and the up and down directions respectively is a second direction, the battery module 1 is located in the box body 2, and the end plate 12 and the partition 13 are both installed in the box body 2.

[0074] The battery cell 11 refers to a basic unit that can realize mutual conversion between chemical energy and electrical energy.

[0075] The battery cell 11 may be a secondary battery. A secondary battery refers to a battery cell 11 that can be continuously used by activating active materials by charging after the battery cell 11 is discharged.

[0076] The battery cell 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 embodiments of the present application.

[0077] The number of battery cells 11 is at least two, and at least two battery cells 11 can be connected in series, in parallel, or in a hybrid connection. A hybrid connection means that at least two battery cells 11 are both connected in series and in parallel. At least two battery cells 11 can be connected in series, in parallel, or in a hybrid connection to form a battery module 1, and at least two battery modules 1 can be connected in series, in parallel, or in a hybrid connection to form a whole, and the whole formed by connecting at least two battery modules 1 in series, in parallel, or in a hybrid connection is placed in the box 2. The battery pack may also include other structures, for example, the battery pack may also include a busbar component for realizing electrical connection between at least two battery cells 11.

[0078] Exemplarily, the battery cell 11 can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes a square shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc. There is no special limitation in the present application.

[0079] For the convenience of explanation, the first direction and the second direction are set, and the first direction, the second direction and the up-down direction are directions intersecting 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. Figure 2 and Figure 3 As shown by the arrows in the middle, 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.

[0080] Exemplarily, the intersection includes perpendicular intersection, the first direction perpendicularly intersects the second direction, the first direction perpendicularly intersects the up-down direction, and the second direction perpendicularly intersects the up-down direction.

[0081] The end plate 12 is a structure with a certain wall thickness, and the end plate 12 can be connected to the battery cell 11 .

[0082] The separator 13 has a certain wall thickness and can be connected to the battery cell 11 .

[0083] The box body 2 refers to a structure with a containing space. The battery module 1 is located in the box body 2. The box body 2 contains the battery module 1, thereby providing a certain degree of protection for the battery module 1 and reducing the risk of the battery module 1 being exposed to the outside and damaged.

[0084] Exemplarily, the material of the box body 2 can be metal.

[0085] Exemplarily, the material of the box body 2 may be plastic.

[0086] Exemplarily, the housing 2 may be sealed.

[0087] In the battery pack of the embodiment of the present application, the partition 13 is provided with end plates 12 on both sides along the first direction, and the partition 13 is provided between the end plates 12 on both sides. There is a battery cell 11 between the end plates 12 and the partition 13 on each side. The end plates 12 and the partition 13 on each side clamp the battery cell 11 to fix the battery cell 11. The end plates 12, the partitions 13 and the battery cell 11 form an integral structure. The gravity of the battery cell 11 is transferred to the end plates 12 and the partitions 13, and then transferred to the box body 2 by the partitions 13, and the structure is stable. In each battery module 1, the battery cell 11 is clamped by the end plates 12 on both sides and the corresponding partitions, so that more battery cells 11 can be clamped between the end plates 12 on both sides of each battery module 1. Under roughly the same conditions, it is beneficial to reduce the number of modules in the battery pack, thereby reducing or even eliminating the use of longitudinal beams and cross beams, simplifying the structure of the battery pack, and improving the volume density of the battery pack.

[0088] In one embodiment, please refer to Figure 1 to Figure 6 The box body 2 includes a supporting main board 23, a supporting side plate 22 and a main box 21. The supporting side plate 22 and the supporting main board 23 are both connected to the main box 21. The supporting side plate 22 is connected to the end plate 12, and the supporting main board 23 is connected to the partition 13 to support the battery module 1. There is a gap between the end plate 12, the partition 13 and the bottom of the battery cell 11 and the main box 21.

[0089] The main box 21 refers to a structure with a certain wall thickness on the outside of the battery pack, and the structural components of the battery pack are located inside the main box 21 .

[0090] The supporting main board 23 is a structure having a certain thickness in the gravity direction and can withstand pressure.

[0091] The supporting side plate 22 is a structure with a certain thickness in the gravity direction and can withstand pressure.

[0092] Exemplarily, the supporting side plates 22 and the supporting main plate 23 are welded to the main box 21 .

[0093] Exemplarily, the supporting side plates 22 and the supporting main plate 23 are integrally formed with the main box 21 .

[0094] Exemplarily, the supporting main plate 23 and the supporting side plate 22 may be cuboids.

[0095] Exemplarily, the supporting main plate 23 and the supporting side plate 22 may be hollow structures or solid structures.

[0096] In the embodiment of the present application, the gravity of the battery module 1 is first transferred to the supporting side plate 22 and the supporting middle plate, and then transferred to the main box 21 by the supporting side plate 22 and the supporting middle plate, so as to prevent the gravity of the battery module 1 from falling directly on the main box 21, thereby protecting the main box 21. By providing a gap between the bottom of the battery cell 11 and the main box 21, the bottom of the battery cell 11 in the main box 21 is exposed in the gap, which is conducive to making full use of the gap at the bottom of the battery cell 11 to arrange the structure that needs to contact the battery cell 11.

[0097] It is understandable that the structure of the box 2 is not limited. In one embodiment, the box 2 may not be provided with supporting side plates 22 and supporting main plates 23 , and the end plates 12 , partitions 13 and battery cells 11 of the battery module 1 are directly connected to the main box 21 .

[0098] In one embodiment, please refer to Figures 1 to 9 The battery module 1 includes a temperature regulating device 17, which is at least partially located in the gap, and the temperature regulating device 17 is connected to the end plate 12 and the partition plate 13 respectively.

[0099] The temperature control device 17 can adjust the temperature of the battery cells 11 .

[0100] Exemplarily, the temperature of the battery cell 11 is high, which affects the normal operation of the battery cell 11 , and the temperature regulating device 17 can cool down the battery cell 11 .

[0101] Exemplarily, the temperature of the battery cell 11 is low, which affects the normal operation of the battery cell 11 , and the temperature regulating device 17 can increase the temperature of the battery cell 11 .

[0102] In the embodiment of the present application, the temperature regulating device 17 is connected through the end plate 12 and the partition 13, so that the temperature regulating device 17 is not constrained by the connection relationship at the bottom of the main box 21, which is conducive to the temperature regulating device 17 being close to the battery cell 11 and having a good temperature regulating effect.

[0103] It is understandable that the position of the temperature regulating device 17 is not limited. For example, the temperature regulating device 17 can be arranged on the upper side of the battery module 1.

[0104] In one embodiment, the temperature control device 17 is a water cooling plate.

[0105] The water-cooled plate is a component that exchanges heat through liquid cooling. The heat dissipation principle is to form flow channels in the metal plate. The components are installed on the surface of the water-cooled plate, and a heat-conducting medium is coated in the middle. The internal coolant enters from the inlet of the plate and then takes away the outlet heat of the components from the outlet.

[0106] In the embodiment of the present application, during the use of the battery pack, a reaction occurs inside the battery cell 11 , and the battery cell 11 generates heat. The temperature affects the normal operation of the battery cell 11 , and the water cooling plate helps the battery cell 11 to dissipate heat and maintain the normal operation of the battery cell 11 .

[0107] It is understandable that the temperature control device 17 is not limited to a water cooling plate. In one embodiment, the temperature control device 17 is an air cooling system.

[0108] In one embodiment, please refer to Figure 3 and Figure 4 The bottom of the battery cell 11 is glued to the water cooling plate.

[0109] In the embodiment of the present application, the bottom of the battery cell 11 is glued to the water cooling plate to increase the installation area, so that the water cooling plate is installed stably, and the firm fit is conducive to heat dissipation.

[0110] It is understandable that the water cooling plate and the bottom of the battery cell 11 are not limited to being glued. In one embodiment, the water cooling plate and the bottom of the battery cell 11 are spaced apart.

[0111] In one embodiment, please refer to Figure 3 and Figure 4 The bottom of the water cooling plate and the main box 21 are surrounded by a buffer space 3, and the buffer space 3 is vacant.

[0112] In the embodiment of the present application, there is a gap between the bottom of the battery module 1 and the main box 21, the water cooling plate is connected to the bottom of the battery module 1, and the bottom of the water cooling plate and the main box 21 are enclosed to form a buffer space 3, which can buffer the impact force outside the main box 21 and protect the water cooling plate.

[0113] It is understandable that the battery pack is not limited to being provided with the buffer space 3. In one embodiment, the bottom of the water cooling plate is in direct contact with the main box 21.

[0114] In one embodiment, please refer to Figures 1 to 9 The end plate 12 includes a vertical plate 121 and a protruding structure 122 . The water cooling plate is connected to the vertical plate 121 . The protruding structure 122 is connected to a side of the vertical plate 121 away from the battery cell 11 . The protruding structure 122 is connected to the supporting side plate 22 .

[0115] In the embodiment of the present application, the battery cell 11 closest to the end plate 12 is connected to the side of the vertical plate 121 in the first direction, there is a gap between the bottom surface of the vertical plate 121 and the main box 21, the water cooling plate is connected to the bottom surface of the vertical plate 121, and the protrusion structure 122 is connected to the supporting side plate 22 on the side of the vertical plate 121 away from the battery cell 11. The supporting side plate 22 and the water cooling plate are staggered to facilitate the installation of the water cooling plate and the vertical plate 121.

[0116] It is understandable that the structure of the end plate 12 is not limited. In one embodiment, the end plate 12 is not provided with the protrusion structure 122, and the lower side of the end plate 12 is connected to the supporting side plate 22 and the water cooling plate.

[0117] In one embodiment, please refer to Figure 3The two ends of the partition 13 along the second direction are respectively provided with supporting main boards 23 , and the partition 13 has a mounting portion 131 located between the supporting main boards 23 , and the mounting portion 131 is connected to the water cooling plate.

[0118] In the embodiment of the present application, both ends of the partition 13 are connected to the supporting main board 23, and the supporting main board 23 avoids the water cooling plate. The distance between the supporting main boards 23 at both ends can at least allow the water cooling plate to pass through. The partition 13 reserves an installation portion 131 to facilitate the installation of the water cooling plate.

[0119] It is understandable that the support mainboard 23 is not limited to a setting position. In one embodiment, the support mainboard 23 can be set at one end of the partition 13, and the mounting portion 131 is set at the other end of the partition 13.

[0120] In one embodiment, please refer to Figure 1 to Figure 6 The end plate 12 and the partition plate 13 are both detachably connected to the box body 2 , and the bottom of the battery cell 11 is spaced apart from the box body 2 .

[0121] Exemplarily, the end plate 12 is connected to the box body 2 by bolts.

[0122] Exemplarily, the partition plate 13 is connected to the box body 2 by bolts.

[0123] Exemplarily, the end plate 12 is snap-connected with the box body 2 .

[0124] Exemplarily, the partition 13 is snap-fitted to the box body 2 .

[0125] Exemplarily, after the end plate 12 and the partition plate 13 are removed from the box body 2 , the end plate 12 , the partition plate 13 , the battery cell 11 and the water-cooling plate are removed from the box body 2 together.

[0126] In the embodiment of the present application, the battery module 1 can be removed from the box body 2 as a whole, and the battery module 1 can be replaced separately, which is convenient for the battery pack to be repaired.

[0127] In one embodiment, the end plate 12 is detachably connected to the supporting side plate 22 , and the partition plate 13 is detachably connected to the supporting main plate 23 .

[0128] In one embodiment, the battery pack includes a protective coating, and the surface of the box body 2 is provided with the protective coating.

[0129] Exemplarily, the protective coating is an anti-corrosion coating.

[0130] Exemplarily, the protective coating is a fire retardant coating.

[0131] Exemplarily, the protective coating is an insulating coating.

[0132] In the embodiment of the present application, a protective coating is provided on the inner and outer surfaces of the box body 2 to protect the box body 2 from being damaged by the external environment and to prevent the battery module 1 from causing damage to the box body 2 .

[0133] In one embodiment, please refer to Figures 1 to 8 , the number of battery modules 1 is at least two, and all battery modules 1 are arranged along the second direction.

[0134] In the embodiment of the present application, the battery module 1 can arrange as many battery cells 11 as possible along the first direction, and all battery modules 1 are arranged along the second direction, so as to reduce or even eliminate the use of longitudinal beams and transverse beams.

[0135] Exemplarily, the number of battery modules 1 may be 2, 3 or 4.

[0136] It is understandable that the arrangement direction of the battery modules 1 is not limited. In one embodiment, the battery modules 1 are arranged along the arrangement direction of the battery cells 11 .

[0137] In one embodiment, please refer to Figure 1 and Figure 2 The battery module 1 includes a side plate 14 , and the end plate 12 is provided with a side plate 14 on both sides of the second direction. Each side plate 14 is connected to the end plate 12 on both sides respectively, and the battery cell 11 is located in the space enclosed by the side plate 14 and the end plate 12 .

[0138] In the embodiment of the present application, the side plates 14 on both sides are connected to the end plates 12 on both sides, and the battery cells 11 are fixed in the space enclosed by the side plates 14 and the end plates 12 , thereby enhancing the overall rigidity of the battery module 1 and improving the safety of the battery pack.

[0139] It is understandable that the battery module 1 may not be provided with the side plate 14 depending on the situation.

[0140] In one embodiment, please refer to Figure 5 The battery module 1 includes a first strap 15 and a second strap 16. The first strap 15 is connected to the end plates 12 on both sides above the battery module 1. The first straps 15 are arranged at intervals along the second direction. The second strap 16 is sleeved on the side of the battery module 1 to fix the battery cell 11. The second strap 16 is connected to the end plates 12 on both sides.

[0141] Exemplarily, the first binding strap 15 and the second binding strap 16 are made of plastic.

[0142] Exemplarily, the first binding strap 15 and the second binding strap 16 are made of stainless steel.

[0143] It should be explained that the second binding band 16 is arranged along the vertical projection direction of the battery module 1 , and the second binding band 16 surrounds the battery module 1 to bundle the entire battery module 1 .

[0144] In the embodiment of the present application, the first strap 15 and the second strap 16 restrain the battery cell 11 so that the battery cell 11 is firmly installed. During the use of the battery pack, the battery cell 11 may expand and deform along the first direction. The first strap 15 and the second strap 16 can withstand the pressure on the end plate 12 caused by the deformation of the battery cell 11, thereby protecting the battery module 1.

[0145] It is understandable that the battery module 1 may not be provided with the second binding strap 16 and the first binding strap 15 depending on the situation.

[0146] In one embodiment, please refer to Figures 1 to 9 , the number of battery cells 11 is at least two, the direction in which at least two battery cells 11 are arranged in sequence is the first direction, the partition 13 is provided with end plates 12 on both sides along the first direction, and there is a battery cell 11 between the end plate 12 and the partition 13 on each side, the second direction intersects with the first direction, the battery module 1 is located in the box body 2, and the end plate 12 and the partition 13 are both installed on the box body 2. The supporting side plate 22 and the supporting main board 23 are both connected to the main box 21, the supporting side plate 22 is connected to the end plate 12, and the supporting main board 23 is connected to the partition 13 to support the battery module 1, and there is a gap between the partition 13, the end plate 12 and the bottom of the battery cell 11 and the main box 21. The battery module 1 includes a water-cooled plate, which is at least partially located in the gap, and the water-cooled plate is connected to the end plate 12 and the partition 13 respectively. The bottom of the water-cooled plate and the main box 21 are surrounded by a buffer space 3. The water-cooling 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 cell 11, and the protruding structure 122 is connected to the supporting side plate 22. Support main boards 23 are respectively provided at both ends of the partition 13 along the second direction, and the partition 13 has a mounting portion 131 located between the supporting main boards 23, and the mounting portion 131 is connected to the water-cooling plate. The end plate 12 and the partition 13 are both detachably connected to the box body 2, and the bottom of the battery cell 11 is arranged at intervals from the box body 2. A protective coating is provided on the surface of the box body 2. All battery modules 1 are arranged along the second direction. The first strap 15 is connected to the end plates 12 on both sides above the battery module 1, and the first strap 15 is arranged at intervals along the second direction. The second strap 16 is sleeved on the side of the battery module 1 to fix the battery cell 11, and the second strap 16 is connected to the end plates 12 on both sides. The battery pack eliminates longitudinal beams and cross beams, and the end plates 12 and partitions 13 are connected to the box body 2 to support the battery module 1, thereby reducing costs and improving the volume energy density of the battery pack. The battery module 1 is detachable so that the battery pack can be repaired. The lower part of the box body 2 directly serves as the bottom guard plate of the battery module 1. There is an empty gap between the bottom of the battery module 1 and the box body 2. The foam is eliminated to reduce costs. The first strap 15 and the second strap 16 restrain the battery cell 11 to reduce costs.

[0147] Exemplarily, the battery module 1 is provided with a side panel 14 instead of the second strap 16 and the first strap 15, and the end plate 12 is provided with a side panel 14 on both opposite sides along the second direction, and each side panel 14 is respectively connected to the end plate 12 on both sides, and the battery cell 11 is located in the space enclosed by the side panel 14 and the end plate 12.

[0148] In one embodiment, please refer to Figure 1 and Figure 2 Each battery module 1 is provided with supporting side plates 22 on two opposite sides along the first direction, and each battery module 1 is correspondingly provided with a supporting main board 23 .

[0149] In one embodiment, please refer to Figure 1 and Figure 2 In each battery module 1, the supporting side plates 22 on the same side are arranged at intervals along the second direction. The supporting main plates 23 of each battery module 1 are arranged at intervals along the second direction.

[0150] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application is described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the present application.

Claims

1. A battery pack, characterized in that: include: A battery module, comprising a battery cell, an end plate and a partition, 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 partition is provided with the end plates on both sides along the first direction, the battery cell is provided between the end plate on each side and the partition, and the direction intersecting the first direction and the up-down direction respectively is a second direction; A box body, the battery module is located in the box body, and the end plate and the partition are both installed on the box body.

2. The battery pack according to claim 1, characterized in that: The box body includes a supporting main board, a supporting side plate and a main box, the supporting side plate and the supporting main board are both connected to the main box, the supporting side plate is connected to the end plate, and the supporting main board is connected to the partition to support the battery module, and there is a gap between the end plate, the partition and the bottom of the battery cell and the main box.

3. The battery pack according to claim 2, characterized in that: The battery module further includes a temperature regulating device, which is at least partially located in the gap and is connected to the end plate and the partition respectively.

4. The battery pack according to claim 3, characterized in that: The temperature regulating device is a water cooling plate.

5. The battery pack according to claim 4, characterized in that: The bottom of the battery cell is glued to the water cooling plate.

6. The battery pack according to claim 4, characterized in that: The bottom of the water cooling plate and the main box are surrounded by a buffer space, and the buffer space is vacant.

7. The battery pack according to claim 4, characterized in that: The end plate includes a vertical plate and a protruding structure. The water cooling plate is connected to the vertical plate. The protruding structure is connected to a side of the vertical plate away from the battery cell. The protruding structure is connected to the supporting side plate.

8. The battery pack according to claim 4, characterized in that: The supporting main boards are respectively arranged 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 any one of claims 1 to 8, characterized in that: The end plate and the partition are both detachably connected to the box body, and the bottom of the battery cell is spaced apart from the box body.

10. The battery pack according to any one of claims 1 to 8, characterized in that: It comprises a protective coating, and the surface of the box body is provided with the protective coating.

11. The battery pack according to any one of claims 1 to 8, characterized in that: 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 8, characterized in that: The battery module includes side plates, and the side plates are arranged on opposite sides of the end plates along the second direction. 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 surrounded by the side plates and the end plates.

13. The battery pack according to any one of claims 1 to 8, characterized in that: The battery module includes a first strap and a second strap, the first strap is connected to the end plates on both sides above the battery module, the first strap is arranged at intervals along the second direction, the second strap is sleeved on the side of the battery module to fix the battery cell, and the second strap is connected to the end plates on both sides.

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

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

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