Battery pack, vehicle and energy storage device

Abstract

To provide a battery pack that offers advantages such as high space utilization ratio, high energy density, strong endurance capability, high reliability, low cost, and high quality.SOLUTION: There are provided a battery pack, a vehicle, and an energy storage device. The battery pack includes a cell array and a support member. The cell array includes a plurality of cells. The cell has a first dimension that represents a maximum spacing between two imaginary parallel planes sandwiching the cell; and at least one that satisfies 600 mm≤first dimension≤2500 mm, of the cells and is supported by the support member. A normal direction of the two parallel planes corresponding to the first dimension is a Q direction. In the battery pack, a cell placement region is formed. The cell array is positioned in the cell placement region. The cells extend from one side of the cell placement region to the other side of the cell placement region along the Q direction.SELECTED DRAWING: Figure 12

Description

[Technical Field]

[0001] (CROSS-REFERENCE TO RELATED APPLICATIONS) This application was filed by BB Company Limited on January 9, 2019. National patent application numbers "201910021244.0", "201910020967.9", "201910021246.X", "201910021248.9", "20191 Claiming priority to patent applications 0021247.4 and 201910020925.5 No. 60 / 699,992, the entire contents of which are incorporated herein by reference. The present application relates to the technical field of vehicle manufacturing, and specifically to a battery pack, The present invention relates to a vehicle and an energy storage device having the battery pack. [Background technology]

[0002] In the prior art, for example, the battery pack applied to the electric vehicle is mainly a battery pack and a plurality of battery modules each consisting of a plurality of cells, which are attached to the battery pack. Includes the following:

[0003] As user requirements for the driving range of electric vehicles gradually increase, When the space at the bottom is limited, the power battery pack in the prior art The utilization rate between the power grid and the battery pack is low, and the energy density of the power grid cannot meet the demand. This has also become an important factor limiting the development of electric vehicles. Summary of the Invention [Problem to be solved by the invention]

[0004] In the prior art, as shown in FIG. 1, a battery pack includes a battery pack case and includes a plurality of The cross beam 500 and the multiple vertical beams 600 support the battery pack case and multiple battery modules. The battery module 400 is attached to the CROSSBY board by screws or the like. The battery modules 400 are fixed to the vertical beams 500 or the vertical beams 600. The plurality of cells are arranged in a row and provided with end plates and / or side plates on the outside. The array generally includes both end plates and side plates, which are fixed and electrically The end plates and side plates are used to secure the battery array. connected by screws, welding, or other connecting members such as tie rods. Or so it seems.

[0005] The battery module 400 is connected to the cross beam 500 and the vertical beam 600 by a structure such as a screw. Since the unit is fixed to the wall, space is wasted and the number of connecting parts such as screws increases, making the unit heavy. The battery module 400 has a high mass and a low energy density. The end and side plates are designed to have a consistent thickness and height, The internal space of the battery pack is wasted, resulting in a low volume utilization rate of the battery pack. In the battery pack of the above-mentioned prior art, the sum of the volumes of the cells inside the battery pack and the The ratio to volume is about 50%, and even as low as 40%.

[0006] According to the battery pack according to the above-mentioned prior art example, the end plates and side plates of the battery module 400 The connection and installation method inside the battery pack are all based on the internal space of the battery pack. As a result, the volume of the battery pack is reduced by the sum of the volumes of the cells and the battery pack. The ratio is too low and the energy density cannot meet the growing demand. This has become a major factor limiting the development of electric vehicles. The assembly process is complicated, from assembling the battery module to connecting the battery module to the battery It must be installed inside the pack, which increases labor and material costs, and multiple Because multiple assembly processes are required, the probability of defective products occurring during the battery pack assembly process is high. Therefore, multiple assembly attempts may cause the battery pack to loosen and the installation to become less secure. This will have a negative impact on the quality of the battery pack and reduce the stability and reliability of the battery pack. do.

[0007] The present application aims to solve at least one of the technical problems in the prior art. Therefore, the present disclosure provides a high space utilization rate, a high energy density, a strong cruising capability, To provide a battery pack having advantages such as high reliability, low cost, and high quality. The purpose is to: [Means for solving the problem]

[0008] In order to achieve the above object, the battery pack according to the present application includes a battery array and a support member. The battery array includes a plurality of unit cells, and the unit cells are virtually sandwiched between the unit cells. The first dimension is the maximum distance between two parallel planes, and at least one cell is , 600 mm≦first dimension≦2500 mm and is supported by the support member, The normal direction of the two parallel planes corresponding to the first dimension is the Q direction, and the battery pack a battery mounting area is formed within the battery array, the battery array is positioned in the battery mounting area, and the battery , extending from one side of the battery mounting area to the other side of the battery mounting area along the Q direction.

[0009] The battery pack according to the present application includes a battery array and a support member, and the battery array includes a plurality of a cell having a dimension A that is the length of a smallest circumscribing rectangular parallelepiped of the cell; At least one cell satisfies 600 mm≦dimension A≦2500 mm, and the support Supported by the member.

[0010] The battery pack according to the present application includes a battery array and a support member, and the battery array includes a plurality of At least one cell includes a battery body and a battery extending from the battery body. and an electrode terminal for drawing out an internal current from the battery body, the battery body being a substantially rectangular parallelepiped, The length of the main body is L, and satisfies 600 mm≦L≦2500 mm, and the support member a battery mounting area is formed in the battery pack, and the battery array is The at least one cell is located in the mounting area, and the longitudinal direction of the smallest circumscribed rectangular parallelepiped of the cell is The battery mounting area extends from one side of the battery mounting area to the other side of the battery mounting area along the direction.

[0011] According to the above technical means, the arrangement method of the cells in the battery pack and the size of the cells are limited. This allows more cells to be placed in the battery pack, The pouch battery may be supported by a support member, and the pouch battery will expand and split open without exploding. To achieve this, the safety performance of the cells has been improved, and the cells directly placed inside the battery pack case have been In the battery, the module frame is omitted, so the cells are not attached to the battery pack case or other This allows for easy heat dissipation through the heat dissipation member, and also allows for more unit cells to be placed within the available space. This allows for a large volume utilization rate, which, combined with the large occupancy rate of the electrode body in a pouch battery, This simplifies the battery pack manufacturing process and reduces the complexity of cell assembly. By reducing the density and reducing production costs, the weight of the battery pack and the entire battery pack can be reduced. This reduces the weight of the battery pack, especially when the battery pack is installed in an electric vehicle. This will also improve the driving range of electric vehicles and make them lighter. This will ultimately improve the capacity, voltage and driving range of the entire battery pack. This design increases the space utilization rate from the conventional 40% to over 60%, and even more. For example, it can be improved to 80%.

[0012] A vehicle according to the present application includes the battery pack.

[0013] The energy storage device according to the present application includes the battery pack.

[0014] The vehicle and the energy storage device have the same advantages over the prior art battery packs described above. Since there are advantages to this, the description will be omitted here.

[0015] Additional aspects and advantages of the present application are set forth in part in the description that follows and in part in the description that follows. These and other objects, features, and advantages of the present invention will become apparent in the following detailed description or may be learned by practice of the present invention. [Brief explanation of the drawings]

[0016] The above and / or additional aspects and advantages of the present application are described below by way of example with reference to the drawings. This makes it clearer and easier to understand. [Figure 1] FIG. 1 is an exploded view of a battery pack according to the prior art. [Figure 2] 1 is a perspective view of a battery pack according to an embodiment of the present application; [Figure 3] 1 is a perspective view of a cell according to an embodiment of the present application; [Figure 4] 1 is a schematic diagram illustrating an arrangement of a plurality of unit cells in a battery pack according to an embodiment of the present application. [Figure 5] 1 is a perspective view of a battery pack according to an embodiment of the present application; [Figure 6] FIG. 10 is a perspective view of a battery pack according to another embodiment of the present application. [Figure 7] FIG. 10 is a perspective view of a battery pack according to still another embodiment of the present application. [Figure 8] FIG. 8 is an enlarged view of part A in FIG. [Figure 9] 1 is a cross-sectional perspective view of a battery pack according to an embodiment of the present application; [Figure 10] FIG. 10 is an enlarged view of part B in FIG. [Figure 11] 1 is a cross-sectional view of a battery pack according to another embodiment of the present application, where the first end beam and the second end beam are not shown. [Figure 12] FIG. 1 is an exploded view of a battery pack according to an embodiment of the present application. [Figure 13] FIG. 2 is a perspective view of a first side plate or a second side plate according to an embodiment of the present application. [Figure 14] 1 is a perspective view of a first end plate or a second end plate according to one embodiment of the present application. FIG. [Figure 15] 1 is a perspective view of a battery pack according to an embodiment of the present application, including a plurality of battery modules; [Figure 16] 1 is a perspective view of a battery pack (space) according to an embodiment of the present invention when formed in an electric vehicle; [Figure 17] 1 is a cross-sectional view of a space according to an embodiment of the present application; [Figure 18] 1 is a perspective view illustrating a vehicle tray according to an embodiment of the present invention when fixed to an electric vehicle; [Figure 19] 1 is an exploded assembly view of a battery pack (vehicle tray) according to an embodiment of the present application when fixed to an electric vehicle. [Figure 20] 1 is a perspective view of a battery pack according to an embodiment of the present application; [Figure 21] FIG. 10 is a perspective view of a battery pack according to another embodiment of the present application. [Figure 22] FIG. 10 is a perspective view of a battery pack according to yet another embodiment of the present application. [Figure 23] FIG. 10 is a perspective view of a battery pack according to yet another embodiment of the present application. [Figure 24] FIG. 10 is a perspective view of a battery pack according to yet another embodiment of the present application. [Figure 25] FIG. 1 is a perspective view of a bottom beam according to an embodiment of the present application. [Figure 26] 1 is a schematic configuration diagram of a vehicle according to an embodiment of the present application; [Figure 27] 1 is a schematic diagram of an energy storage device according to an embodiment of the present application; [Figure 28] FIG. 2 is a diagram illustrating the principle of measuring the first dimension and the second dimension of the present invention. [Figure 29] FIG. 10 is a perspective view of a battery pack according to yet another embodiment of the present application. [Figure 30] FIG. 10 is a schematic diagram of a cell according to yet another embodiment of the present application. [Figure 31] FIG. 10 is a perspective view of a battery pack according to yet another embodiment of the present application. [Figure 32] FIG. 10 is a schematic diagram of a cell according to yet another embodiment of the present application. DETAILED DESCRIPTION OF THE INVENTION

[0017] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to the present embodiments, examples of which are illustrated in the drawings and which are designated by the same or similar characters throughout. Similar symbols indicate identical or similar parts, or parts with identical or similar functions. The embodiments described below with reference to the drawings are merely illustrative and should not be construed as limiting the scope of the present application. These are merely illustrative and should not be construed as limiting the present application.

[0018] As shown in FIGS. 2 to 32, a battery pack 200 according to an embodiment of the present invention includes a battery array 3 and and a support member 4.

[0019] The battery array 3 includes a plurality of cells 100, and the cells 100 are virtually The first dimension is the maximum distance between the two parallel planes that sandwich the at least one The cell 100 satisfies the condition 600 mm≦first dimension≦2500 mm.

[0020] In a certain cell 100, there are multiple pairs of parallel planes, and each pair of parallel planes is The two parallel planes of each pair virtually sandwich the cell 100. There is a distance between the two parallel planes in each pair, and the first dimension is the distance between these two parallel planes. This is the maximum value.

[0021] As shown in FIG. 28, the definition of the first dimension refers to the Feret diameter. The Feret diameter is the dimension of an object measured along a certain direction. Generally, the measurement method is defined as measuring the distance between two parallel planes, These two parallel planes must sandwich the object and be perpendicular to the specified direction.

[0022] The shape of the cell 100 may vary and may be a regular geometric shape or an irregular It may be of any geometric shape, for example, square, circular, polygonal, triangular, irregular The shape of the cell may be any shape, such as a battery. The present application does not limit the shape of the cell. It is understood that.

[0023] When the cell 100 is a non-circular cell, the first dimension can be understood as follows: There are a plurality of pairs of two parallel planes that contact the contour edge of the cell 100, and If the distance between two parallel planes in one pair is greater than the distance between two parallel planes in each of the other pairs, then The large spacing can be defined as the first dimension.

[0024] In actual implementation, a support area is provided on the outer surface of the cell 100, and the support area is The first and second electrodes may be provided at both ends of the cell 100 along the first dimension direction. It can be supported on the support member 4 along a first dimension.

[0025] The inventors of the present application have designed the first dimension of the cell 100 to be 600 mm to 2500 mm. Since the unit cells 100 are sufficiently long, the unit cells 100 can be supported directly on the support member 4. Therefore, the use of the cross beam 500 and / or the longitudinal beam 600 in the battery pack 200 Furthermore, the cross beam 500 and / or the longitudinal beam 500 can be reduced in the battery pack 200. beam 600 may not be used, and as a result, the cross beam 500 and / or the longitudinal beam 6 00 reduces the space occupied by the battery pack 200, improving the space utilization rate of the battery pack 200. Therefore, it is possible to arrange as many battery packs 100 as possible in the battery pack 200, and thus For example, in electric vehicles, This design has increased the space utilization rate from the conventional 40% to over 60%, and even more. For example, it can be improved to 80%.

[0026] Here, the fact that the support member 4 abuts against the support area means that the support member 4 is in direct contact with the support area. The support member 4 may be configured to contact the support member 4 and support the unit cell. The device may be indirectly in contact with or connected to the holding area, depending on the situation of use. The present application does not limit the scope of the present invention to this.

[0027] The cell 100 is a pouch battery, and if a potential safety issue occurs, the pouch The battery expands and splits open without exploding, improving the safety performance of the cell 100. On the other hand, the electrode body of the pouch battery occupies a large area, making it possible to improve the volume utilization rate. The processing cost of pouch batteries is low. For example, in electric vehicles, this design is advantageous in terms of space utilization. To increase the rate from the current level of around 40% to 60% or more, or even higher, such as 80% can be done.

[0028] In some embodiments, as shown in FIGS. 29 to 32, the cell 100 includes a case and a The support member 4 includes an electrode body located in the case and a reinforcing member that reinforces the case. The support area may be provided on the outer surface of the reinforcing member, and the support area may be provided on the outer surface of the reinforcing member. The pouch cell 105 includes a case and an electrode body located within the case. The aluminum plastic film of the inner cell 105 is damaged due to the displacement of the pouch cell 105. The rigidity of the battery pack 100 itself is high, and the battery pack 100 can be prevented from being broken. The rigidity of the block 200 can be improved.

[0029] The reinforcing member includes a reinforcing shell 104, which supports at least one cell. The support member 4 is enclosed in a case of the cell 100, and the support member 4 abuts against the reinforcing shell 104 to support the cell 100. The reinforcing shell 104 may completely encase the pouch cell 105 or may be a small area around the pouch cell 105. The reinforcing shell 104 may encase the area corresponding to the support member 4 of the reinforcing shell 104, which is a hard case. The reinforcing shell 104 may be made of a metal material, or may be made of a composite material. In this case, the metal case of the cell 100 has a higher thermal conductivity, and the discharge of the cell 100 is It is possible to improve thermal efficiency and optimize heat dissipation effects.

[0030] The reinforcing shell 104 may be partially perforated to reduce weight.

[0031] In the embodiment shown in FIGS. 29 and 30, each reinforcing shell 104 is provided for one pouch cell 10 5, and in the embodiment shown in Figures 31 and 32, each reinforcing shell 104 is a single pouch. The battery 105 is enclosed.

[0032] In some embodiments, the cell 100 has an electrode terminal for drawing an internal current, and a reinforcing portion The member is a current joining member configured to electrically connect the electrode terminals of the plurality of cells 100. The support member 4 abuts against the current joining member to support the cell 100. When a plurality of unit cells 100 are arranged on the support member 4, the electrical connections of the plurality of unit cells 100 are can sometimes be realized.

[0033] Also, there is no need to place cross beams and / or end beams within the battery pack 200. This simplifies the manufacturing process of the battery pack 200 and reduces the complexity of assembling the cells 100. This reduces the production cost while also reducing the weight of the battery pack 200. In particular, when the battery pack is installed in an electric vehicle, the driving range of the electric vehicle is This can also improve the efficiency of electric vehicles and reduce their weight.

[0034] 600 mm≦first dimension≦1500 mm, preferably 600 mm≦first dimension The length of the cell 100 is long enough to be supported by the support member 4. When used in a battery pack 200, the rigidity of the cell 100 itself is sufficient. Very large.

[0035] In the present application, the specific form of the battery pack is not particularly limited, and the battery pack may include a support member 4. The battery array 3 is positioned on the support member 4 and the cells 100 are supported by the support member 4. The present application does not limit the specific structure of the support member 4, and the support member 4 may be any member that supports the unit cell 100. It is sufficient that the support member 4 can support the battery cell 1. The specific structure of the support member 4 will be described later. The battery 100 is supported by a support member 4, and the battery 100 is directly supported by the support member 4. That is, they may be placed on the support member 4 or fixed to the support member 4. Physical fixation methods are described below, and the present application is not limited to any particular support or fixation method.

[0036] The support member 4 supports the battery array 3 and is generally a rigid structure, and is suitable for mounting on a complete vehicle or other It may be a separate processed tray for easy attachment to the device, and may be attached to the chassis of the vehicle. It may also be a rigid support structure molded into the shell.

[0037] In some embodiments, the cell 100 is disposed between two parallel planes that virtually sandwich the cell. The second dimension is the minimum value of the spacing between the two parallel planes, and the normal direction of the two parallel planes corresponding to the second dimension is The direction is the P direction, and the plurality of unit cells are arranged along the P direction of at least one unit cell. can be.

[0038] In a certain cell 100, there are multiple pairs of parallel planes, and each pair of parallel planes is The two parallel planes of each pair virtually sandwich the cell 100. There is a distance between the two parallel planes in each pair, and the second dimension is the distance between these two parallel planes. This is the minimum value.

[0039] For the definition of the second dimension, refer to the Feret diameter, as shown in FIG. The Feret diameter is the dimension of an object measured along a certain direction. Generally, the measurement method is defined as measuring the distance between two parallel planes, These two parallel planes must sandwich the object and be perpendicular to the specified direction.

[0040] When the cell 100 is a non-circular cell, the second dimension can be understood as follows: There are a plurality of pairs of two parallel flat surfaces that contact the contour edge of the cell 100, The distance between the two parallel planes in one pair is smaller than the distance between the two parallel planes in each of the other pairs. In other words, the minimum spacing can be defined as the second dimension.

[0041] The normal direction of the two parallel planes corresponding to the second dimension is the P direction, and the plurality of unit cells are arranged along the P direction of any one of the cells in the battery array 3.

[0042] At least one cell satisfies 23≦first dimension / second dimension≦208, and In some embodiments, the first dimension / second dimension satisfies 50≦first dimension / second dimension≦70. This allows the rigidity to satisfy the support requirements for the unit cell 100 that satisfies the above dimensional requirements. In addition, by reducing the thickness of the cell 100 in the direction in which the second dimension exists, It was found that the pond 100 itself has a high heat dissipation capacity.

[0043] In some embodiments, the volume of the cell 100 is V, and the volume of at least one cell 10 The battery body of 0 is 0.0005mm -2 ≦First dimension / V≦0.002mm -2 fulfill The volume V of the cell was obtained by the drainage method, i.e., placing the cell in a container filled with water. The volume of the water spilling out of the container is equal to the volume of the cell. When the battery 100 satisfies the above restrictions, the cross section of the cell 100 is small, the heat dissipation effect is high, and As shown above, it was found that the temperature difference between the inside and the surroundings of the cell 100 was small.

[0044] In another embodiment of the present application, the ratio of the surface area S to the volume V of the battery body of the single cell 100 is 0.1mm -1 ≦S / V≦0.35mm -1 The ratio is long and thin. This may be achieved by the cell 100 or by adjusting the dimensions. By controlling the ratio of the surface area S to the volume V of the cell 100, the length of the cell 100 is The heat dissipation effect of the battery cell 100 is improved by ensuring that the battery cell 100 has a sufficient heat dissipation area. We can guarantee this.

[0045] The surface area of ​​the cell means the sum of the areas of all the surfaces of the cell.

[0046] In the present embodiment, at least one cell 100 has a first dimension along a first direction. and a second end, at least one of the first end and the second end being a single The battery 100 has electrode terminals for drawing out the internal current, and the electrode terminals between the cells 100 are connected to each other. The electrical connection is made by a material.

[0047] Here, the "first end" and the "second end" of the cell 100 refer to the orientation of the cell 100. This is for illustrative purposes only and is intended to limit the specific structure of the battery 100. For example, the first end and the second end do not define the positive and negative electrodes of the cell 100. In one embodiment, as shown in FIGS. 2 to 4, a single cell 10 The first electrode terminal 101 of the battery 100 is drawn out from the first end of the battery 100. The second electrode terminal 102 is drawn out from the second end of the cell 100. The first dimension of the cell 100 may be the direction of current flow inside the cell 100, i.e., That is, the current direction inside the cell 100 is the first dimension direction. Since it is the same as the first dimension direction of the unit cell 100, the effective heat dissipation area of ​​the unit cell 100 is larger. Here, the first electrode terminal 101 is the positive electrode of the cell 100. The second electrode terminal 102 is the negative electrode of the cell 100, or the first electrode terminal 10 1 is the negative electrode of the cell 100, and the second electrode terminal 102 is the positive electrode of the cell 100. The electrode terminals of the cells 100 are connected in series and parallel by connecting members.

[0048] The battery packs are provided on both sides of the battery array 3 facing each other and sandwich the battery array 3. The side plate members sandwich the battery array 3 and prevent the expansion of the plurality of single cells 100. By having the function of limiting the tensile deformation, the explosion prevention valve 103 and / or current interrupt device (CID) Specifically, in some embodiments, as shown in FIG. , the side plate members may be the third end beam 203 and the fourth end beam 204, and other In some embodiments, as shown in FIG. 12, the side panel member may include a first side panel 209 and a second side panel 210. It may be a side panel 210 .

[0049] In some embodiments, as shown in FIGS. 3 and 20-24, The normal direction of the two parallel planes is the Q direction, and the battery packs are set facing each other along the Q direction. The vehicle tray includes a first end beam 201 and a second end beam 202. The support member 4 is a first end beam 201 and a second end beam 202, and the unit cell 1 Both ends of the 00 are supported by a first end beam 201 and a second end beam 202, respectively. can be.

[0050] In some other embodiments, the support member 4 is a plurality of bottom beams, the bottom beams being: Located below the battery array 3. The bottom beam supports the battery array 3. The surface may be flat so as to be supported on the surface of the battery array 3. , the bottom beam has a rectangular cross section. There may be a plurality of bottom beams, and the plurality of bottom beams may be The battery array 3 may be arranged in parallel with a space therebetween, or may be arranged in a crossing manner. The battery pack may be fixed to the bottom beam by a method such as a screw connection member. Both further include a sealing cover that forms an accommodation space for accommodating the battery array 3. prevents the intrusion of dust, water, etc.

[0051] As shown in FIG. 25, the normal direction of the two parallel planes corresponding to the first dimension is the Q direction. The bottom beam is located on the first beam 501 and the bottom beam is located on the first beam 501. 501 and a second beam 502 intersecting the first beam 501, and the extending direction of the first beam 501 and the Q direction The angle formed by the first beams 501 is 60 to 90 degrees, and the cells 100 are supported by the first beams 501. In the embodiment shown in FIG. 25, the first beam 501 and the second beam 502 are connected vertically. The first beam 501 and the second beam 502 are connected by a screw connection member. The first beam 501 and the second beam 502 are , either of which may be a linear beam.

[0052] In actual implementation, there are two second beams 502, and the two second beams 502 are are located at both ends of the first beam 501 and are perpendicular to the first beam 501. The cell 100 is supported by a first beam 501. A second beam 502 is supported by the first beam 501. The lower surface of the second beam 502 projects upward (Z direction) relative to the beam 501. The first beam 501 may be connected to the top surface of the first beam 501, and when the cells 100 are arranged, the outermost The two cells 100 are respectively abutted against the sides of the two second beams 502 facing each other. The center of the cell 100 is located on the first beam 501, and the longitudinal direction of the cell 100 is The direction is perpendicular to the longitudinal direction of the first beam 501, and the center of the cell 100 is aligned with the first beam. By matching the beam 501, the single cell 100 can be supported by a single beam. Of course, in other embodiments, there may be multiple first beams 501. Preferably, the plurality of first beams 501 are spaced apart parallel along the second direction.

[0053] In another embodiment, the normal direction of the two parallel planes corresponding to the first dimension is the Q direction. The bottom beam may be a plurality of rectangular beams spaced apart in parallel, The angle between the extension direction of the beam and the Q direction is 60 to 90 degrees, and the unit cell 100 is arranged in a rectangular beam. The rectangular beams may be uniformly distributed along the Q direction, and the extending direction of the rectangular beams is perpendicular to the Y direction, and the cells 100 are located in a uniformly distributed rectangular beam.

[0054] It will be appreciated that the shape of the bottom beam may include, but is not limited to, straight and rectangular. In another embodiment of the present application, the slits 16 shown in FIG. As shown, the support member 4 is the chassis of the automobile, and the battery array 3 is the chassis of the automobile. The battery pack 200 may be directly formed in the electric vehicle, i.e., the battery The pack 200 may be formed in any suitable location on the electric vehicle and may include the cells 100. For example, the battery pack 200 may be formed on the chassis of an electric vehicle.

[0055] In some embodiments, the cells 100 may be mounted to a vehicle chassis to facilitate assembly. A downwardly recessed space 300 is provided.

[0056] In one specific embodiment of the present application, the space 300 may include a first side wall 301 and a second side wall 303 that are provided opposite each other, and the first side wall 301 may extend downward from the chassis of the electric vehicle to obtain an extension of the first side wall 301; 2 The side wall 302 of the battery 100 may extend downward from the chassis of the electric vehicle to form an extension of the second side wall 302, and thus, in one embodiment, a first end of the battery 100 may be supported by the extension of the first side wall 301, and a second end of the battery 100 may be supported by the extension of the second side wall 302. That is, the present application further provides an electric vehicle in which the batteries 100 can be arranged according to the above technical means, and a space 300 having characteristics similar to those of a single vehicle tray is formed in the electric vehicle to form the battery pack 200 of the present application.

[0057] In some embodiments, the law of two parallel planes corresponding to the first dimension is used, as shown in FIG. The line direction is the Q direction, and the battery pack 200 has a battery mounting area formed therein. 3 is located in the battery mounting area, and the battery pack 200 includes one battery array 3, 100 extends from one side of the battery mounting area to the other side of the battery mounting area along the Q direction. The pack contains only one cell in the Q direction.

[0058] In some embodiments, the cell is spaced apart by a distance between two parallel planes that virtually sandwich the cell. and the normal directions of the two parallel planes corresponding to the second dimension are P direction, a battery mounting area is formed in the battery pack 200, and the battery array 3 is The battery mounting area is located in a P direction, and N (N is 1 or more) battery arms are arranged in the P direction. and M (M is 1 or more) battery arrays 3 along the Q direction. The layers 3 are electrically connected to each other by connecting members between the electrode terminals of the cells. The electrode terminal of the last cell in the battery array 3 (N is 1 or more) and the electrode terminal of the Nth battery array The electrode terminals of the first cell in (a) 3 are connected by a connecting member. In the battery pack, a plurality of battery arrays 3 are provided along the arrangement direction of the cells 100. That is, a plurality of rows of battery arrays 3 are provided in the battery pack 200 .

[0059] Specifically, as shown in FIG. 21, the first separator 700 is 3 is divided into two battery arrays 3 along the P direction of the battery pack 200. The last cell 100 in the battery array 3 and the first cell in the subsequent battery array 3 are connected by a connecting member are connected by

[0060] In the battery pack 200 according to the present application, a battery mounting area is formed in the battery pack, and the battery The array 3 is located in a battery mounting area, and the battery mounting area has M (M is 1 or more) arrays arranged along the Q direction. The battery arrays 3 are connected to each other by connecting the electrode terminals of the cells. The M-1th (M is 1 or more) battery array 3 is electrically connected by a member. The electrode terminal of the last cell in the Mth battery array 3 and the electrode terminal of the first cell in the Mth battery array 3 are In other words, the plurality of unit cells 10 are connected by the connecting member in the extending direction of the unit cells 100. 0 may be housed, that is, a plurality of rows of battery arrays 3 may be provided in the battery pack 200. do.

[0061] Specifically, as shown in FIG. 20, the second separator 800 separates the battery array 3 into battery panels. The battery array 3 is divided into two along the Q direction of the block 200. The last cell 100 and the first cell in the subsequent battery array 3 are connected by a connecting member. will be done.

[0062] In the battery pack 200 according to the present application, a battery mounting area is formed in the battery pack, and the battery The array 3 is located in a battery mounting area, and the battery mounting area has N (N is 1 or more) a battery array 3 in the Q direction (M is 1 or more); The battery arrays 3 are electrically connected to each other by connecting members between the electrode terminals of the cells. In other words, the battery mounting area is divided into multiple sub-battery mounting areas in the P direction of the battery pack. The battery 100 may be divided into two or more cells 100, and a plurality of cells 100 may be housed in the extending direction Q of the cells 100. That is, the battery pack 200 includes the battery array 3 arranged in multiple rows and multiple columns.

[0063] In the above embodiment, the battery pack includes a plurality of electrodes distributed along the Q direction. An array of cells is provided or distributed along the longitudinal direction of the smallest circumscribing rectangular parallelepiped of the cells. A plurality of battery arrays are provided, or a plurality of battery arrays are provided distributed along the Y direction. When a battery is provided, a plurality of battery mounting areas are formed within the battery, and the plurality of battery mounting areas are The battery arrays are positioned in one-to-one correspondence with the battery mounting areas.

[0064] Specifically, as shown in FIG. 22, a first separator 700 and a A second separator 800 is provided, and the first separator 700 and the second separator 80 0 divides a plurality of cells into two rows and two columns of battery arrays 3. Any two battery arrays 3 are , and the electrode terminals are connected by connecting members.

[0065] In the above description, the first separator 700 and the second separator 800 have reinforcing ribs. It may be other structural members such as insulating cotton, and the present application is not limited thereto. .

[0066] The present application does not particularly limit the number of cells 100 in the battery array 3, and can be applied to different vehicle models and required According to different powers, different numbers of cells 100 can be arranged, and some of the present invention In a specific example, the number of cells in the battery array 3 is 60 to 200. In this specific example, the number of cells in the battery array 3 is 80 to 150.

[0067] The number of cells 100 in the battery array of the present invention is not limited, and may be, for example, two. The battery pack of the present application may include one battery array as described above, or may include a plurality of battery arrays. Each battery array may be the same or different, and within the battery pack, In addition to the above battery arrays, other types of cells may be used, such as batteries designed according to the internal space of the battery pack. A battery having a small size may be included, and the specific placement thereof is as described in the battery adapter of the present invention. It is not limited to Ray.

[0068] As shown in FIGS. 2 to 32, a battery pack 200 according to another embodiment of the present invention includes a battery array 3 and a support member 4.

[0069] The battery array 3 includes a plurality of cells 100. The cells 100 have a minimum outer diameter of 100mm. At least one cell 100 has a dimension A that is the length of the rectangular parallelepiped. The dimension A≦2500 mm is satisfied, and the cell 100 is supported by the support member 4 .

[0070] The above minimum circumscribed rectangular parallelepiped is introduced merely to facilitate understanding of the above dimension A, This is not actually present in the solution of the present application.

[0071] Specifically, the minimum circumscribed rectangular parallelepiped can be understood as follows: For 100, there is one rectangular case, and the six sides of this rectangular case are Assuming that the inner wall of the case abuts against the outer casing of the cell at the same time, the rectangular parallelepiped case has the above The dimension A is the length of the smallest circumscribing rectangular parallelepiped. For a cube, length > height > width.

[0072] The shape of the cell 100 may vary and may be a regular geometric shape or an irregular It may be of any geometric shape, for example, square, circular, polygonal, triangular, irregular The shape of the cell may be any shape, such as a battery. The present application does not limit the shape of the cell. It is understood that.

[0073] In actual implementation, a support area is provided on the outer surface of the cell 100, and the support area is 100 along the direction of dimension A. It can be supported by the support member 4 along the direction of dimension A.

[0074] The inventors of the present application have found that if the dimension A of the cell 100 is designed to be 600 mm to 2500 mm, Since the battery 100 is sufficiently long, the single cell 100 can be directly supported by the support member 4. , reducing the use of cross beams 500 and / or longitudinal beams 600 in the battery pack 200. Furthermore, in the battery pack 200, the cross beam 500 and / or the vertical beam 600, so that the cross beam 500 and / or the longitudinal beam 600 reduces the space occupied by the battery pack 200, improving the space utilization rate of the battery pack 200; As many battery packs 100 as possible are arranged in the battery pack 200, and as a result, the total number of battery packs is For example, in electric vehicles, This design increases the space utilization rate from the conventional 40% to over 60%, or even more, e.g. Here, the contact of the support member 4 with the support area can be improved to 80%. The support member 4 may be in direct contact with the support area to support the unit cell. The support member 4 is indirectly in contact with or connected to the support area by another member. This can be set depending on the usage situation, and the present application does not limit this.

[0075] The cell 100 is a pouch battery, and if a potential safety issue occurs, the pouch The battery expands and splits open without exploding, improving the safety performance of the cell 100. On the other hand, the electrode body of the pouch battery occupies a large area, making it possible to improve the volume utilization rate. The processing cost of pouch batteries is low. For example, in electric vehicles, this design is advantageous in terms of space utilization. To increase the rate from the current level of around 40% to 60% or more, or even higher, such as 80% can be done.

[0076] In some embodiments, as shown in FIGS. 29 to 32, the cell 100 includes a case and a The support member 4 includes an electrode body located in the case and a reinforcing member that reinforces the case. The support area may be provided on the outer surface of the reinforcing member, and the support area may be provided on the outer surface of the reinforcing member. The pouch cell 105 includes a case and an electrode body located within the case. The aluminum plastic film of the inner cell 105 is damaged due to the displacement of the pouch cell 105. The rigidity of the battery pack 100 itself is high, and the battery pack 100 can be prevented from being broken. The rigidity of the block 200 can be improved.

[0077] The reinforcing member includes a reinforcing shell 104, which supports at least one cell. The support member 4 is enclosed in a case of the cell 100, and the support member 4 abuts against the reinforcing shell 104 to support the cell 100. The reinforcing shell 104 may completely encase the pouch cell 105 or may be a small area around the pouch cell 105. The reinforcing shell 104 may encase the area corresponding to the support member 4 of the reinforcing shell 104, which is a hard case. The reinforcing shell 104 may be made of a metal material, or may be made of a composite material. In this case, the metal case of the cell 100 has a higher thermal conductivity, and the discharge of the cell 100 is It is possible to improve thermal efficiency and optimize heat dissipation effects.

[0078] The reinforcing shell 104 may be partially perforated to reduce weight.

[0079] In the embodiment shown in FIGS. 29 and 30, each reinforcing shell 104 is provided for one pouch cell 10 5, and in the embodiment shown in Figures 31 and 32, each reinforcing shell 104 is a single pouch. The battery 105 is enclosed.

[0080] In some embodiments, the cell 100 has an electrode terminal for drawing an internal current, and a reinforcing portion The member is a current joining member configured to electrically connect the electrode terminals of the plurality of cells 100. The support member 4 abuts against the current joining member to support the cell 100. When a plurality of unit cells 100 are arranged on the support member 4, the electrical connections of the plurality of unit cells 100 are can sometimes be realized.

[0081] Also, there is no need to place cross beams and / or end beams within the battery pack 200. This simplifies the manufacturing process of the battery pack 200 and reduces the complexity of assembling the cells 100. This reduces the production cost while also reducing the weight of the battery pack 200. In particular, when the battery pack is installed in an electric vehicle, the driving range of the electric vehicle is This can also improve the efficiency of electric vehicles and reduce their weight.

[0082] In some embodiments, 600 mm≦dimension A≦1500 mm, e.g., 600 mm≦dimension A≦1500 mm. The length of the cell 100 is sufficient to be supported by the support member 4. When used in the battery pack 200, the rigidity of the cell 100 itself is also Big enough.

[0083] In the present application, the specific form of the battery pack is not particularly limited, and the battery pack may include a support member 4. The battery array 3 is positioned on the support member 4 and the cells 100 are supported by the support member 4. The present application does not limit the specific structure of the support member 4, and the support member 4 may be any member that supports the unit cell 100. It is sufficient that the support member 4 can support the battery cell 1. The specific structure of the support member 4 will be described later. The battery 100 is supported by a support member 4, and the battery 100 is directly supported by the support member 4. That is, they may be placed on the support member 4 or fixed to the support member 4. Physical fixation methods are described below, and the present application is not limited to any particular support or fixation method.

[0084] The support member 4 supports the battery array 3 and is generally a rigid structure, and is suitable for mounting on a complete vehicle or other It may be a separate processed tray for easy attachment to the device, and may be attached to the chassis of the vehicle. It may also be a rigid support structure molded into the shell.

[0085] In some embodiments, the plurality of cells are arranged along a K direction, which is the direction of the cell array. It is in the width direction of the smallest circumscribing rectangular parallelepiped of at least one cell in the layer 3.

[0086] The cell 100 has a dimension B, which is the width of the smallest circumscribing rectangular parallelepiped of the cell. The normal direction of the two parallel planes is the K direction, and the multiple cells are connected by at least one They are arranged along the K direction of the pond.

[0087] At least one cell satisfies 10≦dimension A / dimension B≦208, and some implementations In an example, at least one cell satisfies 23≦dimension A / dimension B≦208. In this embodiment, the relationship 50≦dimension A / dimension B≦70 is satisfied. The unit cell 100 that satisfies the above-mentioned dimensional requirements is mounted on the unit cell 100 so that its rigidity satisfies the support requirements. By reducing the thickness of the battery 100 in the direction of dimension B, the cell 100 itself It was found to have high heat dissipation capacity.

[0088] In some embodiments, the cells 100 are arranged along a K direction, which is The height direction of the smallest circumscribing rectangular parallelepiped of at least one cell 100 in the battery array 3. The cell 100 has a dimension C which is the height of the smallest circumscribing rectangular parallelepiped of the cell 100 .

[0089] At least one cell 100 satisfies 10≦dimension A / dimension C≦208, for example, Satisfy 23≦Dimension A / Dimension C≦208, for example, satisfy 50≦Dimension A / Dimension C≦70 The inventors have conducted extensive testing and found that the rigidity of the unit cell 100 that satisfies the above dimensional requirements is sufficient. While satisfying the durability requirement, the thickness of the cell 100 in the direction of the dimension C is reduced. It has been found that by doing so, the cell 100 itself has a high heat dissipation capability.

[0090] The battery packs 200 are provided on both sides of the battery array 3 so as to face each other and sandwich the battery array 3. The side plate members sandwich the battery array 3 and hold the plurality of single cells 10 By having the function of limiting the expansion deformation of the explosion-proof valve 103 and the current interrupter (C Specifically, in some embodiments, the activation of the ID shown in FIG. Thus, the side plate members may be the third end beam 203 and the fourth end beam 204. In some other embodiments, as shown in FIG. 12, the side plate members include a first side plate 209 and a second side plate 209. It may be the second side panel 210 .

[0091] In some embodiments, as shown in FIGS. 3 and 20-24, the battery pack 200 includes: First end beadings are provided opposite to each other along the longitudinal direction of the smallest circumscribing rectangular parallelepiped of the battery pack 200. The vehicle tray includes a first end beam 201 and a second end beam 202, and the support member 4 The first end beam 201 and the second end beam 202 are connected to each other at both ends of the cell 100. They are supported by a first end beam 201 and a second end beam 202, respectively.

[0092] In some other embodiments, the support member 4 is a plurality of bottom beams, the bottom beams being: Located below the battery array 3. The bottom beam supports the battery array 3. The surface may be flat so as to be supported on the surface of the battery array 3. , the bottom beam has a rectangular cross section. There may be a plurality of bottom beams, and the plurality of bottom beams may be The battery array 3 may be arranged in parallel with a space therebetween, or may be arranged crosswise. The battery pack may be fixed to the bottom beam by a method such as a screw connection member. Both further include a sealing cover that forms an accommodation space for accommodating the battery array 3. prevents the intrusion of dust, water, etc.

[0093] As shown in FIG. 25, the bottom beam is a first beam 501 and a second beam 502 positioned on the first beam 501. 501 and a second beam 502 that intersects the first beam 501. The angle between the extension direction of the battery and the longitudinal direction of the smallest circumscribed rectangular parallelepiped of the battery is 60 to 90 degrees. The pond 100 is supported on a first beam 501. In the embodiment shown in FIG. The first beam 501 and the second beam 502 are connected vertically, and the first beam 501 and the second beam 5 The connection method with 02 includes, but is not limited to, connection with screw connection members, welding, etc. Both the first beam 501 and the second beam 502 may be linear beams.

[0094] In actual implementation, there are two second beams 502, and the two second beams 502 are are located at both ends of the first beam 501 and are perpendicular to the first beam 501. The cell 100 is supported by a first beam 501. A second beam 502 is supported by the first beam 501. The lower surface of the second beam 502 projects upward (Z direction) relative to the beam 501. The first beam 501 may be connected to the top surface of the first beam 501, and when the cells 100 are arranged, the outermost The two cells 100 are respectively abutted against the sides of the two second beams 502 facing each other. The center of the cell 100 is located on the first beam 501, and the longitudinal direction of the cell 100 is The direction is perpendicular to the longitudinal direction of the first beam 501, and the center of the cell 100 is aligned with the first beam. By matching the beam 501, the single cell 100 can be supported by a single beam. Of course, in other embodiments, there may be multiple first beams 501. Preferably, the plurality of first beams 501 are spaced apart parallel along the second direction.

[0095] It will be appreciated that the shape of the bottom beam may include, but is not limited to, straight and rectangular. In another embodiment of the present application, the slits 16 shown in FIG. As shown, the support member 4 is the chassis of the automobile, and the battery array 3 is the chassis of the automobile. The battery pack 200 may be directly formed in the electric vehicle, i.e., the battery The pack 200 may be formed in any suitable location on the electric vehicle and may include the cells 100. For example, the battery pack 200 may be formed on the chassis of an electric vehicle.

[0096] In some embodiments, the cells 100 may be mounted to a vehicle chassis to facilitate assembly. A downwardly recessed space 300 is provided.

[0097] In one specific embodiment of the present application, the space 300 is formed by a first space 300a and a second space 300b provided opposite each other. The electric vehicle may include a side wall 301 and a second side wall 302, the first side wall 301 being a chassis of the electric vehicle. The first side wall 301 extends downward from the bottom, and the second side wall 302 extends downward from the bottom. an extension of the second side wall 302 can extend downwardly from the chassis of the electric vehicle; Thus, in one embodiment, the first end of the cell 100 is an extension of the first sidewall 301. The second end of the cell 100 may be supported by an extension of the second side wall 302. That is, the present application relates to an electric automatic device in which the cells 100 can be arranged according to the above technical means. To further provide a vehicle and configure the battery pack 200 according to the present application, the electric vehicle includes: A space 300 is formed having characteristics similar to those of a single vehicle tray.

[0098] In some embodiments, the battery pack 200 includes a battery mounting area, as shown in FIG. The battery array 3 is located in the battery mounting area, and the battery pack 200 is composed of one battery array. The cell 100 is mounted along the longitudinal direction of the smallest circumscribing rectangular parallelepiped of the cell 100. The battery pack 200 extends from one side of the battery placement area to the other side of the battery placement area. Only one cell is accommodated in the longitudinal direction of the smallest circumscribed rectangular parallelepiped.

[0099] In some embodiments, a battery mounting area is formed within the battery pack 200, and the battery array 3 is located in the battery mounting area, and in the battery mounting area, N (N is 1 or more) battery arrays 3 are provided, and the battery arrays 3 are connected to each other by a The electrode terminals are electrically connected by a connecting member.

[0100] In the battery mounting area, there are M (M is 1 or more) cells aligned along the longitudinal direction of the smallest circumscribing rectangular parallelepiped of the cell. The battery arrays 3 are connected to each other by connecting members between the electrode terminals of the cells. More electrically connected.

[0101] Specifically, as shown in FIG. 21, the first separator 700 is 3 is divided into two battery arrays 3 along the K direction of the battery pack 200. The last cell 100 in the battery array 3 and the first cell in the subsequent battery array 3 are connected by a connecting member are connected by

[0102] In the battery pack 200 according to the present application, a battery mounting area is formed in the battery pack, and the battery The array 3 is located in a battery mounting area, and the battery mounting area has M (M is 1 or more) arrays arranged along the Q direction. The battery arrays 3 are connected to each other by connecting the electrode terminals of the cells. The M-1th (M is 1 or more) battery array 3 is electrically connected by a member. The electrode terminal of the last cell in the Mth battery array 3 and the electrode terminal of the first cell in the Mth battery array 3 are In other words, the plurality of unit cells 10 are connected by the connecting member in the extending direction of the unit cells 100. 0 may be housed, that is, a plurality of rows of battery arrays 3 may be provided in the battery pack 200. do.

[0103] Specifically, as shown in FIG. 20, the second separator 800 separates the battery array 3 into battery panels. The battery array 3 is divided into two along the Q direction of the block 200. The last cell 100 and the first cell in the subsequent battery array 3 are connected by a connecting member. will be done.

[0104] In the battery pack 200 according to the present application, a battery mounting area is formed in the battery pack, and the battery The array 3 is located in a battery mounting area, and the battery mounting area has N (N is 1 or more) arrays arranged along the K direction. a battery array 3 in the Q direction (M is 1 or more); The battery arrays 3 are electrically connected to each other by connecting members between the electrode terminals of the cells. In other words, the battery mounting area is divided into multiple sub-battery mounting areas in the K direction of the battery pack. The battery 100 may be divided into two or more cells 100, and a plurality of cells 100 may be housed in the extending direction Q of the cells 100. That is, the battery pack 200 includes the battery array 3 arranged in multiple rows and multiple columns.

[0105] Specifically, as shown in FIG. 22, a first separator 700 and a A second separator 800 is provided, and the first separator 700 and the second separator 80 0 divides a plurality of cells into two rows and two columns of battery arrays 3. Any two battery arrays 3 are , and the electrode terminals are connected by connecting members.

[0106] In the above description, the first separator 700 and the second separator 800 have reinforcing ribs. It may be other structural members such as insulating cotton, and the present application is not limited thereto. .

[0107] A battery mounting area is formed in the battery pack, and the battery array 3 is located in the battery mounting area. In the battery mounting area, J (J is 1 or more) cells are arranged along the height direction of the smallest circumscribing rectangular parallelepiped of the cell. The battery arrays 3 are connected to each other by connecting members between the electrode terminals of the cells. are electrically connected.

[0108] The present application does not particularly limit the number of cells 100 in the battery array 3, and can be applied to different vehicle models and required According to different powers, different numbers of cells 100 can be arranged, and some of the present invention In a specific example, the number of cells in the battery array 3 is 60 to 200. In this specific example, the number of cells in the battery array 3 is 80 to 150.

[0109] As shown in FIGS. 2 to 32, a battery pack 200 according to still another embodiment of the present invention includes a battery adapter. It includes a ray 3 and a support member 4.

[0110] The battery array 3 includes a plurality of cells 100, and at least one cell 100 is a battery The battery includes a main body and electrode terminals extending from the main body to draw an internal current from the main body. The body is approximately rectangular parallelepiped, the length of the battery body is L, and 600 mm ≦ L ≦ 2500 mm The cell 100 is supported by a support member 4.

[0111] The battery body being approximately rectangular parallelepiped means that the battery body is rectangular parallelepiped or cubic. Although irregular shapes are locally present, the shape may be approximately rectangular or cuboid, or may have notches or protrusions. Although there are localized rises, chamfers, curvatures, and bends, the overall shape may be approximately rectangular or cuboid. This means:

[0112] In the prior art, the dimensions of the cell 100 are small, the length L of the battery body is short, and the battery pack Since the dimensions of the Y and X directions of the battery are much smaller than those of the battery, the battery 100 can be directly attached. Therefore, in order to facilitate assembly of the cells 100, the battery pack 200 Cross beams 500 and / or longitudinal beams 600 (shown in Figure 1) must be provided. When the battery 100 is attached to the battery pack 200 by the battery module 400, the battery module The modules are secured to adjacent cross beams 500 and / or longitudinal beams 600 by fasteners. can be.

[0113] In the prior art, cross beams 500 and / or longitudinal beams 600 are provided in the battery pack. The cross beams 500 and / or the longitudinal beams 600 are connected to the battery pack 200. Since it takes up a lot of space to accommodate the battery pack, the volume utilization rate of the battery pack is low, and The volume utilization rate of the battery pack 200 is about 40%, and is even lower than that, i.e., In the battery pack 200 of the prior art, the space for installing the cells is about 40%. Therefore, the number of cells 100 that can be accommodated in the battery pack 200 is limited. The overall capacity and voltage are limited, and the battery pack has low range.

[0114] The inventors of the present application have designed the length L of the battery body of the single cell 100 to be 600 mm to 2500 mm. Then, the battery body of the unit cell 100 is sufficiently long, and a support area is provided on the outer surface of the unit cell 100. Therefore, by directly supporting the cell 100 on the support member 4, the cell Reducing the use of cross beams 500 and / or longitudinal beams 600 in the pack 200 Furthermore, in the battery pack 200, the cross beam 500 and / or the longitudinal beam 60 0 may not be used, so that the cross beams 500 and / or the longitudinal beams 600 The space occupied by the battery pack 200 is reduced, the space utilization rate of the battery pack 200 is improved, and the battery pack As many battery packs 100 as possible are arranged in the box 200, and the overall capacity of the battery packs is For example, in electric vehicles, this The design aims to increase the space utilization rate from the conventional 40% to 60% or more, and even higher, for example, 80%. Here, the contact of the support member 4 with the support region can be improved. 4 may be in direct contact with the support area to support the unit cell, 4 may be indirectly in contact with or connected to the support area by another member. This can be set depending on the usage situation, and the present application does not limit this.

[0115] Also, there is no need to place cross beams and / or end beams within the battery pack 200. This simplifies the manufacturing process of the battery pack 200 and reduces the complexity of assembling the cells 100. This reduces the production cost while also reducing the weight of the battery pack 200. In particular, when the battery pack is installed in an electric vehicle, the driving range of the electric vehicle is This can also improve the efficiency of electric vehicles and reduce their weight.

[0116] The cell 100 is a pouch battery, and if a potential safety issue occurs, the pouch The battery expands and splits open without exploding, improving the safety performance of the cell 100. On the other hand, the electrode body of the pouch battery occupies a large area, making it possible to improve the volume utilization rate. The processing cost of pouch batteries is low. For example, in electric vehicles, this design is advantageous in terms of space utilization. To increase the rate from the current level of around 40% to 60% or more, or even higher, such as 80% can be done.

[0117] In some embodiments, as shown in FIGS. 29 to 32, the cell 100 includes a case and a The support member 4 includes an electrode body located in the case and a reinforcing member that reinforces the case. The support area may be provided on the outer surface of the reinforcing member, and the support area may be provided on the outer surface of the reinforcing member. The pouch cell 105 includes a case and an electrode body located within the case. The aluminum plastic film of the inner cell 105 is damaged due to the displacement of the pouch cell 105. The rigidity of the battery pack 100 itself is high, and the battery pack 100 can be prevented from being broken. The rigidity of the block 200 can be improved.

[0118] The reinforcing member includes a reinforcing shell 104, which supports at least one cell. The support member 4 is enclosed in a case of the cell 100, and the support member 4 abuts against the reinforcing shell 104 to support the cell 100. The reinforcing shell 104 may completely encase the pouch cell 105 or may be a small area around the pouch cell 105. The reinforcing shell 104 may encase the area corresponding to the support member 4 of the reinforcing shell 104, which is a hard case. The reinforcing shell 104 may be made of a metal material, or may be made of a composite material. In this case, the metal case of the cell 100 has a higher thermal conductivity, and the discharge of the cell 100 is It is possible to improve thermal efficiency and optimize heat dissipation effects.

[0119] The reinforcing shell 104 may be partially perforated to reduce weight.

[0120] In the embodiment shown in FIGS. 29 and 30, each reinforcing shell 104 is provided for one pouch cell 10 5, and in the embodiment shown in Figures 31 and 32, each reinforcing shell 104 is a single pouch. The battery 105 is enclosed.

[0121] In some embodiments, the cell 100 has an electrode terminal for drawing an internal current, and a reinforcing portion The member is a current joining member configured to electrically connect the electrode terminals of the plurality of cells 100. The support member 4 abuts against the current joining member to support the cell 100. When a plurality of unit cells 100 are arranged on the support member 4, the electrical connections of the plurality of unit cells 100 are can sometimes be realized.

[0122] In the present application, the specific form of the battery pack is not particularly limited, and the battery pack may include a support member 4. The battery array 3 is positioned on the support member 4 and the cells 100 are supported by the support member 4. The present application does not limit the specific structure of the support member 4, and the support member 4 may be any member that supports the unit cell 100. It is sufficient that the support member 4 can support the battery cell 1. The specific structure of the support member 4 will be described later. The battery 100 is supported by a support member 4, and the battery 100 is directly supported by the support member 4. That is, they may be placed on the support member 4 or fixed to the support member 4. Physical fixation methods are described below, and the present application is not limited to any particular support or fixation method.

[0123] The support member 4 supports the battery array 3 and is generally a rigid structure that is independently processed. The support structure may be a tray fitted with a support rail or may be a rigid support structure molded to the chassis of the vehicle. The support member 4 maintains the battery pack in its complete shape and allows the battery pack to be mounted on a complete vehicle or other device. This makes it easy to attach to the

[0124] In the present application, since the length L of the battery body of the cell 100 is long, the battery body itself is supported. It can also reinforce the cross beams and end beams of the battery pack. This reduces the amount of electrical energy consumed, increasing the space utilization rate of the battery pack and allowing more cells to be installed. .

[0125] The battery body of the cell 100 has three mutually perpendicular directions, the X direction, the Y direction, and the Z direction. The X direction, Y direction, and Z direction are perpendicular to each other, and the X direction is the direction in which the cells 100 are arranged. The Y direction is the longitudinal direction of the cells 100, and the Z direction is the height direction of the cells 100. In actual implementation, for example, in the embodiment shown in Figs. 20 to 23, When the battery pack 200 is attached to a completed vehicle, the longitudinal direction of the battery pack 200 is the same as the longitudinal direction of the vehicle 1. The width direction of the battery pack 200 may be parallel to the lateral direction of the vehicle 1. The Y direction may be parallel to the lateral direction of the vehicle 1, and the X direction may be parallel to the longitudinal direction of the vehicle 1. The Z direction may be parallel to the vertical direction of the vehicle 1, for example, in the embodiment shown in FIG. For example, when the battery pack 200 is attached to a completed vehicle, the longitudinal direction of the battery pack 200 is as follows: The width direction of the battery pack 200 may be parallel to the lateral direction of the vehicle 1. The Y direction may be parallel to the longitudinal direction of the vehicle 1, and the X direction may be parallel to the lateral direction of the vehicle 1. The Z direction may be parallel to the vertical direction of the vehicle 1. However, when the battery pack 200 is attached to a completed vehicle, the X, Y, and Z directions are The actual correspondence may be different from the actual direction of the battery pack 20. Depends on the installation direction of 0.

[0126] Unless otherwise specified, the direction in which the vehicle travels in this application is the longitudinal direction of the vehicle. The direction perpendicular to and flush with the direction is the lateral direction of the vehicle, and generally, the horizontal direction. The direction is the vertical direction of the vehicle, typically the vertical direction.

[0127] In some embodiments, the cells 100 may be arranged in order in the X direction, and the number of cells may be limited. In the above arrangement method, the number of cells arranged in the battery pack is large, so that The heat dissipation performance of the entire pack is relatively low, and in order to improve the safety performance of the entire battery pack, , L / H or L / D, the thickness along the X direction and the height along the Z direction The surface area of ​​one cell is made larger than that of a cell in the prior art. , the heat dissipation area of ​​the cells is increased, the heat dissipation rate of the cells is improved, and the entire battery pack This improves safety and makes the battery pack safer and more reliable.

[0128] The arrangement of the plurality of cells 100 in the battery array 3 may be various. is L, the thickness is D, the height is H, the thickness direction is the X direction, and the longitudinal direction is the Y direction. The vertical direction is the Z direction.

[0129] In one embodiment of the present application, the plurality of cells 100 are arranged at intervals along the X direction. As shown in FIG. 2, in this embodiment, the space can be fully utilized. For practical use, they are densely arranged along the X direction.

[0130] In some embodiments, the plurality of cells 100 may be arranged in at least one of the battery arrays 3. The X direction is the same as that of any one of the cells in the battery array 3. The thickness of the battery body is D, and the thickness of the battery body is D. 00 satisfies 10≦L / D≦208, for example, satisfies 23≦L / D≦208, for example, The inventors have conducted a large-scale test to determine whether the above size requirement is satisfied. The rigidity of the unit cell 100 is set to satisfy the support requirement, and the unit cell 100 is supported in the X direction. By reducing the thickness of the battery, the battery 100 itself has a high heat dissipation capacity. .

[0131] In some other embodiments, the plurality of cells 100 in the battery array 3 The cells are arranged along the Z direction of one cell. The Z direction is the same as that of any one cell in the battery array 3. The height of the battery body is H, and the height of the battery body is H. The battery 100 satisfies 10≦L / H≦208, for example, 23≦L / H≦208. For example, 50≦L / H≦70 is satisfied. The inventor has confirmed the above size requirements through a large number of tests. For the single cell 100 that satisfies the support requirements, the rigidity is set to satisfy the support requirements, and the Z direction of the battery body is set to It was found that by reducing the thickness in the direction, the battery body itself has a high heat dissipation capacity.

[0132] When a plurality of cells 100 are arranged, they may form an array with their ends aligned. Alternatively, they may be arranged at an angle to the X direction or Z direction, that is, diagonally. The mounting directions of the batteries 100 may be the same, partially different, or different from each other. It is sufficient that the distribution is along a certain direction.

[0133] In some embodiments, 600 mm≦L≦1500 mm, preferably 600 mm m≦L≦1000 mm. The cell 100 having this length is long and is used in the battery pack 200. In this case, only one cell 100 needs to be arranged along the first direction.

[0134] In some embodiments, the volume of the cell body of the cell 100 is V, and at least one 100 cells are 0.0005mm -2 ≦L / V≦0.002mm -2 Inventor Through mass testing, it has been found that if the cell 100 satisfies the above limitations, the cross section of the cell body is small. It was discovered that the battery itself has a high heat dissipation effect, so the temperature difference between the inside and the surrounding area of ​​the battery is small. Ta.

[0135] In another embodiment of the present application, the ratio of the surface area S to the volume V of the battery body of the single cell 100 is 0.1mm -1 ≦S / V≦0.35mm -1 The ratio is long and thin. This may be achieved by the cell 100 or by adjusting the dimensions. By controlling the ratio of the surface area S to the volume V of the battery, the length of the battery body can be extended along the Y direction. The heat dissipation effect of the battery 100 is ensured by ensuring a sufficient heat dissipation area. It is possible.

[0136] In some embodiments, the volume of the battery body is V, and the height of the battery body is H. The relationship with the volume V of the main body is 0.0001 mm -2 ≦H / V≦0.00015mm -2 Yes do.

[0137] The surface area of ​​the cell means the sum of the areas of all the surfaces of the cell.

[0138] As shown in FIGS. 3 to 4 and 20 to 24, the battery body has a length L and a thickness D. The height is H, the thickness direction is the X direction, the longitudinal direction is the Y direction, and the height direction is The battery body height H is in the Z direction, and the battery body thickness D is greater than or equal to the battery body height H. At least one cell is , 23≦L / D≦208, 4≦L / H≦21 are satisfied, and the plurality of cells are arranged in a battery array 3 In some embodiments, at least one cell is arranged along the X direction. At least one cell satisfies 9≦L / H≦13. The battery body must satisfy the dimensional requirements, and the rigidity must be such that it satisfies the support requirements. By reducing the thickness in the X direction, the battery body itself has a high heat dissipation capacity, and the single cell 10 We found that it is easy to realize a close-packed arrangement of 0 in the X direction.

[0139] In some exemplary embodiments of the present application, at least one cell 100 is The first end and the second end have a first end and a second end along the first end and the second end. One has an electrode terminal that draws out the internal current of the cell, and the electrode terminal between the cells 100 is The electrical connection is made by a connecting member.

[0140] Here, the "first end" and the "second end" of the cell 100 refer to the orientation of the cell 100. This is for illustrative purposes only and is intended to limit the specific structure of the battery 100. For example, the first end and the second end do not define the positive and negative electrodes of the cell 100. In one embodiment, as shown in FIGS. 2 to 4, a single cell 10 The first electrode terminal 101 of the cell 100 is drawn out from a first end portion of the cell 100 facing in the Y direction. The second electrode terminal 102 of the cell 100 is connected to a second end of the cell 100 facing in the Y direction. In other words, the longitudinal direction of the cell 100 is the same as the direction of current flow inside the cell 100. That is, the current direction inside the cell 100 is the Y direction. In addition, since the current direction is the same as the longitudinal direction of the cell 100, the effective heat dissipation area of ​​the cell 100 The first electrode terminal 101 is larger and has a higher heat dissipation efficiency. The first electrode terminal 102 is the positive electrode of the cell 100, and the second electrode terminal 102 is the negative electrode of the cell 100. The terminal 101 is the negative electrode of the cell 100, and the second electrode terminal 102 is the positive electrode of the cell 100. The electrode terminals of the cells 100 are connected in series and parallel by connecting members.

[0141] In one embodiment, at least some of the cells 100 are elongated so that the thickness direction is along the X direction. That is, the plurality of cells are arranged along the thickness direction of the cells.

[0142] In some embodiments, the battery array 3 includes a plurality of cells arranged in order along the X direction. The length of the cell 100 extends along the Y direction, and the height of the cell 100 extends along the Z direction. That is, a plurality of unit cells 100 are arranged in the thickness direction and extend in the longitudinal direction. When using a battery pack, the space in the battery pack can be fully utilized and more cells can be placed. do.

[0143] The cell 100 has a first end and a second end in the longitudinal direction. and / or the second end has an electrode terminal for drawing out the internal current of the cell, and the electrode terminal of the cell The two are connected by a connecting member.

[0144] Here, the "first end" and the "second end" of the cell 100 refer to the orientation of the cell 100. This is for illustrative purposes only and is intended to limit the specific structure of the battery 100. For example, the first end and the second end do not define the positive and negative electrodes of the cell 100. In one embodiment, as shown in FIGS. 2 to 4, a single cell 10 The first electrode terminal 101 of the battery 100 is drawn out from a first end of the battery 100 in the longitudinal direction. The second electrode terminal 102 of the battery 100 is drawn out from the second end of the cell 100 in the longitudinal direction. In other words, the longitudinal direction of the cell 100 is the direction of current flow inside the cell 100. That is, the current direction inside the cell 100 is the Y direction. Since the direction is the same as the longitudinal direction of the cell 100, the effective heat dissipation area of ​​the cell 100 is larger. Here, the first electrode terminal 101 is the positive electrode of the cell 100. The second electrode terminal 102 is the negative electrode of the cell 100, or the first electrode terminal 10 1 is the negative electrode of the cell 100, and the second electrode terminal 102 is the positive electrode of the cell 100. The electrode terminals of the cells 100 are connected in series and parallel by connecting members.

[0145] In the prior art, rectangular cells 1 How to design the dimensions of 00 is one of the issues that needs to be resolved in the field of battery technology. be.

[0146] In one embodiment of the present application, the length L and thickness of the battery body of at least one cell 100 The ratio of L / D to D satisfies 23≦L / D≦208. A battery 100 can be obtained, and in this way, the length of the cell 100 extends along the first direction. Even when the temperature is high, it is guaranteed that the appropriate resistance value, wide heat dissipation area and high heat dissipation efficiency can be maintained. This makes it highly adaptable to a variety of vehicle types.

[0147] In one embodiment of the present application, the length L and thickness of the battery body of at least one cell 100 The ratio of L / D satisfies 50≦L / D≦70. At this ratio, a cell 100 having an appropriate length can be obtained. Furthermore, the rigidity of the cell 100 itself is sufficiently high, so that processing, transportation, and assembly are easy. When the battery cell 100 is attached to the battery pack case, the rigidity of the battery cell 100 is reduced. By utilizing the feature of high resilience, the single cell 100 itself can be used as a reinforcing beam. On the other hand, even when the length of the cell 100 extends along the first direction, an appropriate resistance value can be obtained. It can ensure a large heat dissipation area and high heat dissipation efficiency, and is suitable for various vehicle models. Highly adaptable to

[0148] In the battery pack 200 according to the present application, the battery pack 200 is and two side plate members that are provided on both sides of the battery array 3 so as to face each other and sandwich the battery array 3 therebetween. The member has a function of sandwiching the battery array 3 and limiting the expansion and deformation of the plurality of single cells 100. This ensures the activation of the explosion prevention valve 103 and / or the current interruption device (CID). Specifically, in some embodiments, as shown in FIG. 4, the side plate member has a third end beam. 12. In some other embodiments, the beams may be the fourth end beam 203 and the fourth end beam 204. As shown, the side plate members may be a first side plate 209 and a second side plate 210.

[0149] The battery pack according to the present invention forms a storage space for storing the battery array 3 together with the support member 4. The sealing cover 220 and the support member 4 form a sealing member for accommodating the cells. The sealing cover 220 defines an accommodation space for the device, and serves to prevent water and moisture.

[0150] The battery pack 200 is manufactured independently and is a vehicle trailer that houses and mounts the cells 100. As shown in Figures 16, 18 and 19, the unit cells 100 are mounted on a vehicle tray. After installation, the vehicle tray may be attached to the vehicle body by fasteners, e.g., electrical It is suspended from the chassis of a car.

[0151] The vehicle tray is made up of a first end beam 201 and a second end beam 202 that are arranged opposite each other along the Y direction. The support member 4 includes the first end beam 201 and the second end beam 202. The first end of the cell 100 is supported by the first end beam 201. The second end of the battery 100 is supported by a second end beam 202. does not limit the specific structure of the first end beam 201 and the second end beam 202, The first end beam 201 and the second end beam 202 are provided opposite to each other. It may be parallel to the surface, may be angled, may be a straight structure, or may be a curved The first end beam 201 may be rectangular, cylindrical, or The shape may be a polygon, and the present application does not particularly limit it.

[0152] The first end beam 201 and the second end beam 202 are provided opposite to each other along the Y direction. The plurality of cells 100 are arranged between the first end beam 201 and the second end beam 202. The two ends of the cell 100 are provided with a first end beam 201 and a second end beam 202, respectively. In one embodiment, the first end of each cell 100 is supported by a first end beam 202. The first end of each cell 100 is supported by a beam 201, and the second end of each cell 100 is supported by a second end beam 202. will be done.

[0153] In other words, each cell 100 has a first end beam 201, a second end beam 202, and 20, and the plurality of cells 100 are attached to the first end beam 201 and the second end beam 20 2, that is, they are arranged along the X direction.

[0154] The first and second ends of the cell 100 are connected to a first end beam 201 and a second end beam 202, respectively. The cell 100 is supported by the first end beam 201 and the second end beam 202. 202, i.e., the first end beam 201 and second end beam 202, and the first end beam 201 and the second end The specific fixing method will be described in detail later. The present application does not limit the holding and fixing method.

[0155] In some embodiments of the present application, the first end of each cell 100 is connected to a first end beam 20. The second end of each cell 100 may be supported directly or indirectly by a second end bracket. The cell 100 may be supported directly or indirectly by the frame 202. and the first end beam 201 are in direct contact with each other and are fitted and supported, and the second end of the cell 100 is The term "indirectly" means that the end portion and the second end beam 202 are in direct contact and fitted together. For example, in some embodiments, the first end of the cell 100 is secured by a first end plate 207. The second end of the cell 100 is fitted and supported by the first end beam 201, and the second end of the cell 100 is fitted and supported by the second end plate 208. This means that the second end beam 202 is fitted and supported by the second end beam 202.

[0156] The cell 100 is connected to the first end beam 201 and / or the second end beam 202. It may be perpendicular and form an acute angle with the first end beam 201 and / or the second end beam 202. Alternatively, they may be arranged at an obtuse angle, for example, the first end beam 201 and the second end beam When the first end beam 201, the second end beam 202 and the The cell 100 may have a rectangular, square, parallelogram, sector, or other structure. When the first end beam 201 and the second end beam 202 form an angle, the first end beam 2 01, the second end beam 202 and the unit cell 100 may have a trapezoidal, triangular, or other structure. The present application is directed to the angular relationship between the first end beam 201 and the second end beam 202. , the angular relationship between the cell 100 and the first end beam 201 and the second end beam 202 is not limited to.

[0157] The first end beam 201 and the second end beam 202 are opposed to each other along the Y direction of the tray. As shown in FIG. 2, the first end beam 201 and the second end beam 202 are located on opposite sides of the first end beam 201. The first end beam 201 and the second end beam 202 are located on the outermost side of the tray in the Y direction. This means that the end beams 202 are the outermost edges of the tray.

[0158] The "first end" and the "second end" of the cell 100 are the same as those of the cell 100. The purpose of the present invention is to explain the specific structure of the battery 100. For example, the first end and the second end may define the positive and negative electrodes of the cell 100. That is, in this application, the first end beam of the cell 100 is not intended to be described as a The end supported by the beam 201 is the first end, and the second end of the cell 100 is the beam 202. The end supported by the second end.

[0159] Regarding the vehicle tray, the width of the vehicle body is large, for example, 1.2 m to 2 m, and the length is long. For example, 2m to 5m, and the corresponding vehicle width and vehicle length are different for different vehicle models. Due to the large width and length of the car body, the overall dimensions of the tray at the bottom of the car body When the size of the tray is large, the conventional technology requires the tray to be positioned on the side. In addition to the end beams that must be provided, no cross beams are required inside the tray. otherwise provide sufficient support and structural strength to accommodate the cells therein. After adding a cross beam to the vehicle tray, partial The load is shared by the cross beam and the internal space is occupied by the cross beam. , the effective space available inside the tray is reduced, and the cross beam The presence of a cross beam allows for width and length adjustments to be made inside the tray to accommodate the cross beam installation. It is necessary to install multiple battery modules in the same area, which makes installation complicated and requires many mounting parts. stomach.

[0160] However, removing the cross beams allows for modular layout and The layout method of the single cells provides sufficient structural strength to the battery module. The tray cannot provide sufficient load force.

[0161] In the present application, the length L of the unit cell is 600 to 1500 mm, and both ends of the unit cell 100 are The weight of the unit cell is supported by the first end beam 201 and the second end beam 202. Distributed to the tray end beams, eliminating the cross beams and effectively increasing the tray load capacity In addition, the cell 100 itself can also bear the load.

[0162] The first end beam 201 and the second end beam 202 are connected to two ends of the cell 100, respectively. The inner wall surface of the first end beam 201 and the first end surface of the cell 100 are aligned with each other. An insulating plate is sandwiched between the cell 100 and the first end bead. The inner wall surface of the second end beam 202 and the inner wall surface of the first end beam 203 of the cell 100 are located between the inner wall surface of the second end beam 202 and the inner wall surface of the first end beam 203 of the cell 100. An insulating plate is sandwiched between the cell 100 and the second end of the battery. The insulating plate is located between the inner wall surface of the room 202. Specifically, the specific structure of the insulating plate is not limited. First, it is sufficient if the battery array 3 can be fixed, reinforced, and prevented from expanding. In one embodiment, the insulating plates are a first end plate 207 and a second end plate 208, which will be described later. good.

[0163] The tray includes a bottom plate, and a first end beam 201 and a second end beam 202 are arranged in the Y direction. The cells 100 are provided at opposite ends of the bottom plate along the direction of the arrow B, and the cells 100 and the bottom plate are provided at a distance from each other. This reduces the load on the bottom plate of the unit cell 100, and the majority of the unit cell 100 The weight of the bottom plate can be borne by the first end beam and the second end beam. By reducing the requirements, the manufacturing process of the bottom plate is reduced, and production costs are reduced.

[0164] That is, between the bottom of the battery array 3 in which the plurality of cells 100 are arranged and the bottom plate of the tray By providing the heat insulating layer 217, heat transfer between the unit cell 100 and the outside is blocked, and the unit cell The battery pack 200 is heated and the temperature of the battery pack 200 is maintained constant. The thermal insulation layer 217 is formed of a material having heat insulating properties and a heat-retaining function. It may be made of a material having heat-retaining properties, for example, made of heat-retaining cotton.

[0165] The first end beam 201 and the second end beam 202 support the unit cell 100. To provide the force, in one embodiment of the present application, as shown in FIGS. 5 and 6, The end beam 201 is provided with a first support plate 213, and the second end beam 202 is provided with a second support plate 214. The plate 214 is provided, and the surface of the first support plate 213 facing the sealing cover 220 is provided with a first support surface. A second support surface is provided on the surface of the second support plate 214 facing the sealing cover 220. The first end of each cell 100 is supported on the first support surface of the first support plate 213, and each The second end of the cell 100 is supported on the second support surface of the second support plate 214, and the first support The support plate 213 has a first mounting surface on the surface thereof facing away from the sealing cover 220, and the second support plate 2 The second mounting surface is provided on the surface of the tray 14 that faces away from the sealing cover 220. The first support plate 213 is attached to the first mounting surface and the second mounting surface, and the first end beam 201, and a second support plate 214 may project inward from the bottom of the second end beam 201. It may protrude inward from the bottom of O2.

[0166] Compared to the prior art technical means of supporting the cells 100 by a bottom plate in the battery pack, In comparison, in the present application, the third end beams 201 and 202 are provided with The first support plate 213 and the second support plate 214 support the unit cell 100, The structure of the battery pack 200 can be simplified and the weight of the battery pack 200 can be reduced. The first support plate 213 and the second support plate 214 may be provided with an insulating plate. , is located between the cell 100 and the first support plate 213 and the second support plate 214 .

[0167] The connection method of the first end beam 201, the second end beam 202 and the bottom plate is not particularly limited. , may be integrally molded or may be welded.

[0168] The inner wall surface of the first end beam 201 facing the cell 100 has a first connection surface 215. , the distance from the first connecting surface 215 to the sealing cover 220 is 220, and the inner wall surface of the second end beam 202 facing the cell 100 Each of the second connecting surfaces 216 has a second connecting surface, and the distance from the second connecting surface 216 to the sealing cover 220 is is smaller than the distance from the second support surface to the sealing cover 220, and both ends of the unit cell 100 are in contact with the first connecting surface and the second connecting surface, respectively.

[0169] In some embodiments, the first end beam 201 further comprises a first connecting surface 215. The second end beam 202 is further provided with a second connection surface 216, and the The first end is fixed to the first connection surface 215, and the second end of each cell 100 is fixed to the second connection surface 215. The first connecting surface 215 is fixed to the first end beam 201. The second connecting surface 213 may be a third supporting plate located above the first supporting plate 213. 16 is provided on the second end beam 202 and is located above the second support plate 214. The first end and the second end of the battery may be connected to the first connecting surface by a fastener. 215 and the second connecting surface 216, and the first connecting surface 215 and the second connecting surface 216 may be fixed to each other. It may be welded to surface 216 .

[0170] In actual implementation, the inner wall surface of the first end beam 201 facing the cell 100 is Both have a two-step structure, and the surfaces of the two steps facing the sealing cover 220 each have a first The connecting surface 215 and the first supporting surface are formed, and the second end beam 202 is connected to the cell 100. The inner wall surface facing the sealing cover 220 has at least two steps. The second connecting surface 216 and the second supporting surface are formed on the opposite surfaces, respectively.

[0171] In the battery pack according to the present application, at least some of the cells 100 12 and 14, one cell 10 adjacent to the first end beam 201 A first end plate 207 is provided at the end of the first end beam 201 of the 100, one single-electrode beam adjacent to the second end beam 202. A second end plate 208 is provided at the end of the pond 100 toward the second end beam 202 and includes at least The first end of each cell 100 is connected to the first connection surface 215 by the first end plate 207. The second end of at least one cell 100 is connected to a second end plate 208. the connection surface 216 of the first end plate, i.e., at least one cell is connected to the first end plate of the The first end beam 201 supports at least one cell 100, and the second end plate 208 supports at least one cell 100. The first end plate 207, the second end plate 208 and the second end beam 202 are supported by At least some of the cells 100 constitute a battery module. There may be one first end plate 207 and one second end plate 208, The end plate 208 and the plurality of cells 100 constitute a battery module. The first end beam 201 is connected to the second end beam 202 by a first end plate 207 and a second end plate 208. The first end plate 207 is supported between the main beam 202. There may be a plurality of first end plates 207, and the second end plate 2 There may be a plurality of first end plates 207, second end plates 208 and cells 100. , constitute a plurality of battery modules, each battery module having a corresponding first end plate 207 and Supported between the first end beam 201 and the second end beam 202 by a second end plate 208 Each battery module is mounted between a first end beam 201 and a second end beam 202. The battery modules are connected to a first end beam 201 and a second end beam 202. In the present application, the first end plate 207 and the second end plate 208 are arranged along the longitudinal direction of the first end plate 207 and the second end plate 208. The number, i.e., the number of battery modules, is not limited.

[0172] In some embodiments, the first end plate 207 is disposed opposite the end face of the cell 100. an end plate body 231 connected to the end plate body 231 and projecting toward the first end beam 201; The second end plate 208 faces the end face of the cell 100. and a second end beam 202 connected to the end plate body 231. and a first connecting plate 232 protruding toward the first end plate 207. is connected to the first connecting surface 215, and the first connecting plate 232 of the second end plate 208 is connected to the second It is connected to the connection surface 216. There is no limitation on the specific connection form.

[0173] In one embodiment, as shown in FIGS. 2 and 10, the first end beam 20 of the cell 100 An explosion-proof valve 103 is provided at the first end of the beam 201, and an exhaust gas is discharged into the first end of the beam 201. A passage 222 is provided in the first end beam 201, and an exhaust port is provided in the first end beam 201 at a position corresponding to the explosion-proof valve 103. The battery pack 200 has an air hole 221, which is connected to an exhaust passage 222. The second end beam 20 of the cell 100 is provided with an exhaust port communicating with the exhaust passage 222. An explosion-proof valve 103 is provided at the second end of the beam 202, and an exhaust gas is discharged into the second end of the beam 202. A passage 222 is provided in the second end beam 202, and an exhaust port is provided in the second end beam 202 at a position corresponding to the explosion-proof valve 103. The battery pack 200 has an air hole 221, which is connected to an exhaust passage 222. 12 and 13, an exhaust port communicating with the exhaust passage 222 is provided. 4, the exhaust hole 221 is located between the first end plate 207 and the first end beam 201, and and / or may be formed in the second end plate 208 and the second end beam 202 .

[0174] In the prior art, if the internal air pressure of a cell rises to a certain level during use, the cell will not be protected. The explosion vent opens, and the flames, smoke, or gases inside the cell are released through the explosion vent, causing the battery pack If the dust accumulates inside the battery and cannot be expelled in a timely manner, it may cause secondary damage to the battery. However, in the present application, the first end beam 201 and / or the second end beam 2 02 is provided with an intake port 221 corresponding to the explosion-proof valve 103 of the single cell 100, and An exhaust passage 222 is provided inside the end beam 201 and / or the second end beam 202. Therefore, when the pressure inside the cell 100 rises, the explosion-proof valve 103 opens, and the inside Flame, smoke, gas, etc., can be directly introduced through the inlet 221 into the first end beam 201 and / or The air enters the exhaust passage 222 in the second end beam 202 and exits the first end beam through the exhaust hole. The heat is exhausted from the end beam 201 and / or the second end beam 202, e.g., through exhaust holes. Thus, the flame, smoke, or gases do not collect inside the battery pack 200. , thereby avoiding secondary damage to the cell 100.

[0175] In some embodiments, the first connecting surface 215 and the second connecting surface 216 and the sealing cover 22 0 defines a management accommodation space for accommodating battery management components and power distribution components. The space occupied by the battery management components and power distribution components can be saved, thereby reducing the battery pack size. By arranging more cells in the housing, the space utilization rate can be improved, and the volumetric energy density and It can improve the ability to continue.

[0176] Regarding the tray bottom plate, the unit cells 100 and the tray bottom plate are spaced apart from each other, so that the tray The tray bottom plate is not subjected to force, which simplifies the manufacturing process of the tray bottom plate and saves manufacturing costs. By providing a heat insulating layer between the unit cell 100 and the tray bottom plate, The heat transfer between the battery pack 100 and the outside is blocked, and the heat retention function of the battery pack 100 is realized. The battery pack 200 is provided with a heat exchanger 100 for preventing thermal interference between the external environment of the battery pack 200 and the cells 100 in the battery pack 200. The heat-retaining layer may be made of a material with heat-insulating and heat-retaining properties, for example, heat-retaining cotton. Manufactured.

[0177] In one embodiment of the present application, as shown in FIGS. 3 to 8, the battery pack 200 includes X The third end beam 203 and the fourth end beam 204 are provided opposite to each other along the direction. The plurality of cells 100 may further include a third end beam 203 and a second end beam 204 along the X direction. The battery pack 200 is arranged between the four end beams 204. In one embodiment, the battery pack 200 is rectangular or To form a square, the first end beam 201 and the second end beam 202 are 203 and the fourth end beam 204. , the first end beam 201 to form the battery pack 200 into a trapezoid, parallelogram, etc. The first and second end beams 202 may be parallel to each other, and the third and fourth end beams 203 may be parallel to each other. The end beam 204 is angled with the first end beam 201 and the second end beam 202. The present application may be provided with a first end beam 201, a second end beam 202, a third end beam 203, and a The specific structure of the battery pack 200 is shown in FIG. There is no limitation on the shape.

[0178] In some embodiments, as shown in FIG. 2, the third end beam 203 and the fourth end beam The third end beam 204 provides a pressing force to the battery array 3, and the third end beam 203 For the cell 100 provided adjacent to the beam 203, the fourth end beam 204 is This biasing force is applied to the fourth end beam 204. A biasing force is applied to the attached cell 100 toward the third end beam 203, and thus The plurality of cells 100 are arranged along the X direction by the third end beam 203 and the fourth end beam 204. 204, and a plurality of the cells 100 can be closely arranged. In addition, the third end beam 203 and the fourth end beam 204 are arranged in a plurality of positions in the X direction. In particular, when the cell 100 expands slightly, the cell 100 can be positioned. It acts to provide buffering and inward pressure to the battery 100, It is possible to prevent the expansion and deformation of the cells 100 from becoming too large. If a valve 103 and a current interrupt device (CID) are provided, the third end beam 203 and The four end beams 204 can effectively restrict the expansion of the cell 100. If the battery 100 fails and expands, the inside of the battery 100 may be exposed to an explosion-proof valve 103 or a current interrupter (CI). D) have sufficient air pressure to break through the inverted sheet in the cell 100, thereby shorting out the cell 100. This ensures the safety of the battery 100 and prevents the battery 100 from exploding. do.

[0179] As shown in FIGS. 12 and 13, the third end beam 203 A first elastic device 205 may be provided between adjacent cells 100, and / or a fourth elastic device 205 may be provided between adjacent cells 100. A second elastic member is provided between the first end beam 204 and the cell 100 adjacent to the fourth end beam 204. A first resilient device 205 may be provided. The first resilient device 205 may be attached to the third end beam 203. The second resilient device 206 may be attached to the fourth end beam 204. Preferably, the first elastic device 205 and the second elastic device 206 tightly pack the plurality of unit cells 100. Thus, the third end beam 203 and the fourth end beam 204 Without changing the spacing between the first elastic device 205, the second elastic device 206 and the third elastic device By changing the mounting distance between the first end beam 203 and the fourth end beam 204 , the cells 100 arranged between the third end beam 203 and the fourth end beam 204 The number can be adjusted.

[0180] In some embodiments, the third end beam 203 further comprises a third connecting surface 236. The fourth end beam 204 is further provided with a fourth connection surface 235, and the fourth end beam 204 is provided with a fourth connection surface 235. The first side is fixed to the third connection surface 236 and the second side of each cell 100 is fixed to the fourth connection surface 236. It is fixed to the surface 235.

[0181] As shown in FIGS. 12 and 13, at least some of the cells 100 , toward the third end beam 203 of one of the cells 100 adjacent to the third end beam 203. A first side plate 209 is provided at this end, and at least some of the plurality of cells 100 In this case, the fourth end beam 21 of one cell 100 adjacent to the fourth end beam 204 A second side plate 210 is provided at the end toward 0.

[0182] A first side of at least one cell 100 is connected to the third connection surface 236 by a first side plate 209, and a second side of at least one cell 100 is connected to the fourth connection surface 235 by a second side plate 210, i.e., at least one cell is connected to the fourth connection surface 235 by a first side plate. 3 End beam 20 3and at least one cell 100 is supported by the second side plate 210 to the fourth end beam 204, and the first side plate 209, the second side plate 210, and at least some of the cells 100 constitute a battery module. There may be one first side plate 209 or one second side plate 210, and the first side plate 209, the second side plate 210, and the cells 100 constitute one battery module, and the battery module is supported between the third end beam 203 and the fourth end beam 204 by the first side plate 209 and the second side plate 210. There may be a plurality of first side plates 209 and a plurality of second side plates 210, and the plurality of first side plates 209, second side plates 210 and cells 100 constitute a plurality of battery modules, and each battery module is supported between the third end beam 203 and the fourth end beam 210 by the corresponding first side plate 209 and second side plate 210, and each battery module is arranged between the third end beam 203 and the fourth end beam 210. In the present application, the number of first side plates 209 and second side plates 210, i.e., the number of battery modules, is not limited.

[0183] In some embodiments, the first side plate 209 is provided facing the end face of the cell 100. a side plate body 234 connected to the side plate body 234 and projecting toward the third end beam 203; The second side plate 210 faces the end face of the cell 100. a side plate body 234 provided by the side plate body 234 and a fourth end beam 204 connected to the end plate body 234; and a second connecting plate 234 protruding toward the first side plate 209. The plate 234 is connected to a third connecting surface 236 and corresponds to the second side plate 210. 234 is connected to the fourth connection surface 235. There is no limitation on the specific connection form.

[0184] In some embodiments, at least some of the cells 100 are connected to the second panel 211. The second panel 21 is supported between the first end beam 201 and the second end beam 202. 1 and at least some of the cells 100 constitute a battery module. A second panel 211 is provided below at least a portion of the cells 100, and each cell 100 is connected to the first end beam 201 and the second end beam 202 by the second panel 211. 2, and the second panel 211 and at least some of the plurality of cells 100 are In this embodiment, a battery module is configured, and a plurality of cells 100 are arranged by a second panel 211. The battery module is supported by the first end beam 201 and the second end beam 202. This simplifies the module structure and helps to reduce the weight of the battery pack.

[0185] The first end plate 207 and the second end plate 208, or the second panel 211, may be formed in various embodiments. The first end beam 201 and the second end beam 202 may be supported in a manner such that Therefore, the present application is not limited to, for example, fasteners may be used to fasten the first end beam 201 and the second end beam The first end beam 201 and the second end beam 202 are detachably fastened to each other or are welded to each other. The second end beam 202 is fixed to the first end beam 202 or dispensed onto the first end beam 20 1 and the second end beam 202, or the first end beam 201 and the second end beam 202. The first end beam 201 and the second end beam 202 are mounted directly on the end beam 202. Supported by 202.

[0186] In one embodiment, the battery pack 200 includes a top and bottom surface of at least some of the cells 100. a first panel 212 and a second panel 211 connected to each other, and at least a portion The first end plate 207 and the second end plate 208 are provided on the two end faces of the cell 100, respectively. 08 and a first side plate 20 provided on each of the outer surfaces of the two outermost cells 100. 9 and second side plate 210, and includes a first end plate 207, a second end plate 208, a first side plate 2 The first panel 212 and the second side panel 210 are both made up of two panels: a first panel 212 and a second panel 211. The inner wall surface of the first end beam 201 facing the cell 100 is connected to the first panel. The second end beam 202 has a support surface and a first connecting surface 215, and faces the cell 100. The inner wall surface has a second support surface and a second connection surface 216, and the first end of the cell 100 is The first end of the cell 100 is supported on a first support surface, and the second end of the cell 100 is supported on a second support surface. The first end plate 207 is connected to the first connecting surface 215 and the second end plate 208 is connected to the second connecting surface 216. 16, and the inner wall surface of the third end beam 203 facing the cell 100 is connected to the third connection The inner wall surface of the fourth end beam facing the cell has a fourth connection surface 235. The first side plate 209 is connected to the third connecting surface 236, and the second side plate 210 is connected to the fourth connecting surface 236. It is connected to the connection surface 235 .

[0187] According to the above embodiment, the first end plate 207, the second end plate 208, the first side plate 209, the third The two side panels 210, the first panel 212 and the second panel 211 are arranged to hold the plurality of cells 100. In this way, the cells 100 may malfunction, catch fire, or explode. Then, the first end plate 207, the second end plate 208, the first side plate 209, the second side plate 210, The first panel 212 and the second panel 211 limit the failure of the unit cell 100 within a certain range. This can prevent the explosion of the cell 100 from affecting the surrounding components. The first side plate 209 may be the first elastic buffer device 205, and the second side plate 210 may be the second elastic buffer plate 206, and thus the first side plate 209 and the second The side plates 210 have a function of limiting the expansion and deformation of the plurality of cells 100, thereby preventing Activation of the explosive vent 103 and / or current interrupt device (CID) may be ensured.

[0188] In an embodiment including a first panel 212 in the battery module, as shown in FIG. By providing a heat conductive plate 218 between the panel 212 and the unit cell 100, 0 and ensure that the temperature difference between the cells 100 is not too large. The thermally conductive plate 218 may be made of a material with high thermal conductivity, for example, The conductive plate 218 may be made of a material with high thermal conductivity, such as copper or aluminum.

[0189] In some embodiments, the battery pack may be an alternative embodiment of a battery pack used in a vehicle. When used as a battery pack for supplying electric energy, the lengthwise direction of the cell 100 is The width direction, i.e., the left-right direction of the vehicle.

[0190] In another embodiment of the present application, the support member 4 is a plurality of bottom beams, , located below the battery array 3. The bottom beam supports the battery array 3. The upper surface may be flat so as to be supported on the surface of the battery array 3. The bottom beam has a rectangular cross section. There may be a plurality of bottom beams. The battery array 3 may be arranged in parallel and spaced apart from each other, or may be arranged crossing each other. The battery pack may be secured to the bottom beam by means of a fastener, a screw connection, or the like. The battery array 3 is accommodated in a storage space formed by the sealing cover. - prevents the intrusion of dust, water, etc.

[0191] As shown in FIG. 25, the bottom beam is a first beam 501 and a second beam 502 positioned on the first beam 501. 501 and a second beam 502 that intersects the first beam 501. The angle formed by the extending direction of the first beam 5 and the Y direction is 60 to 90 degrees. In the embodiment shown in FIG. 25, a first beam 501 and a second beam 502 The first beam 501 and the second beam 502 are connected vertically, and the connection method between the first beam 501 and the second beam 502 is a screw connection. The first beam 501 and the second beam 502 may be connected by a connecting member, welding, or the like. The two beams 502 may both be linear beams.

[0192] In actual implementation, there are two second beams 502, and the two second beams 502 are are located at both ends of the first beam 501 and are perpendicular to the first beam 501. The cell 100 is supported by a first beam 501. A second beam 502 is supported by the first beam 501. The lower surface of the second beam 502 projects upward (Z direction) relative to the beam 501. The first beam 501 may be connected to the top surface of the first beam 501, and when the cells 100 are arranged, the outermost The two cells 100 are respectively abutted against the sides of the two second beams 502 facing each other. The center of the cell 100 is located on the first beam 501, and the longitudinal direction of the cell 100 is The direction is perpendicular to the longitudinal direction of the first beam 501, and the center of the cell 100 is aligned with the first beam. By matching the beam 501, the single cell 100 can be supported by a single beam. Of course, in other embodiments, there may be multiple first beams 501. Preferably, the plurality of first beams 501 are spaced apart parallel along the second direction.

[0193] In another embodiment, the bottom beam is a plurality of parallel spaced rectangular beams. The angle between the extending direction of the rectangular beam and the Y direction is 60 to 90 degrees. The 0 is supported by rectangular beams, which may be uniformly distributed along the Y direction and The extension direction of the shaped beam is perpendicular to the Y direction, and the cells 100 are uniformly distributed in a rectangular shape. Located on the beam.

[0194] It will be appreciated that the shape of the bottom beam may include, but is not limited to, straight and rectangular. , triangular, trapezoidal or other irregular shapes.

[0195] In another embodiment of the present application, as shown in FIG. 16, the support member 4 is a support member for a vehicle chassis. The battery array 3 is located on the chassis of the vehicle, and the battery pack 200 is That is, the battery pack 200 may be formed directly on any suitable The battery pack 200 is a device formed in a position where the battery pack 200 is mounted. It may be formed on the chassis of an electric vehicle.

[0196] In some embodiments, the cells 100 may be mounted to a vehicle chassis to facilitate assembly. A downwardly recessed space 300 is provided.

[0197] In one specific embodiment of the present application, the space 300 may include a first side wall 301 and a second side wall 302 that are disposed opposite each other, and the first side wall 301 may extend downward from the chassis of the electric vehicle to provide an extension of the first side wall 301; 2 The side wall 302 of the battery 100 may extend downward from the chassis of the electric vehicle to form an extension of the second side wall 302, and thus, in one embodiment, a first end of the battery 100 may be supported by the extension of the first side wall 301, and a second end of the battery 100 may be supported by the extension of the second side wall 302. That is, the present application further provides an electric vehicle in which the batteries 100 can be arranged according to the above technical means, and a space 300 having characteristics similar to those of a single vehicle tray is formed in the electric vehicle to form the battery pack 200 of the present application.

[0198] In some examples, in one exemplary embodiment according to the present application, the first sidewall 301 The extension and the extension of the second sidewall 302 form a bottom 305 of the space 300, and in one embodiment The extension of the first side wall 301 is connected to the extension of the second side wall 302, forming the space 3 00 is formed in a space 300 having a downwardly recessed U-shaped groove, and the cell 100 is In another embodiment, the extension of the first side wall 301 may be supported by the bottom 305 of the space 300. There may be a fixed distance between the recessed portion and the extension of the second side wall 302.

[0199] As shown in FIG. 2, the battery pack 200 according to the present invention includes a battery A battery mounting area is formed, the battery array 3 is located in the battery mounting area, and the battery pack 200 is It includes one battery array 3.

[0200] In other words, there is no need to provide any reinforcing ribs inside the battery pack, and the battery pack can be directly connected to the The battery 100 acts as a reinforcing rib, greatly simplifying the structure of the battery pack 200. By reducing the space occupied by the reinforcing ribs and the space occupied by the mounting structure of the unit cells 100, Improves space utilization and range.

[0201] In some embodiments of the present application, the battery pack contains only one cell 100 in the Y direction. That is, in the battery pack 200, two or more cells 100 are arranged in the Y direction. The battery pack 200 cannot accommodate only one cell 100. This means that only one unit cell 100 can be arranged in the Y direction. 4 to 6, the cell 100 has a first end beam 201 and a second end beam 202, and the distance between the first end and the second end of the cell 100 is L1. , the distance between the inner surface of the first end beam 201 and the inner surface of the second end beam 202 is L2. and the ratio of L1 to L2 satisfies L1 / L2≧50%. In other words, along the Y direction, Only one cell 100 is disposed between the first end beam 201 and the second end beam 202. The distance relationship between the cell 100 and the two end beams in the Y direction is set in this way. This allows the cell 100 to be used as a cross beam or end beam. In the exemplary embodiment of the present application, the first end beam 201 and the second end beam 202 are arranged along the Y direction. By placing only one cell 100 between the end beams 202 of the two cells, the cell 1 00 itself is a cross beam or end portion for reinforcing the structural strength of the battery pack case 200 It can be used as a beam.

[0202] In some embodiments, the ratio of L1 to L2 satisfies 80%≦L1 / L2≦97%. The first and second ends of the battery 100 are connected to a first end beam 201 and a second end beam 202 as close as possible to the first end beam 201 and the second end beam 202. In this way, the structure of the cell 100 itself allows for the dispersion and transmission of force. The battery pack case 200 is secured to the battery 100 by a closure for reinforcing the structural strength of the battery pack case 200. It is ensured that the battery pack case 200 can be used as a beam or an end beam, and that the battery pack case 200 is not subject to external force. This ensures that the material is strong enough to resist deformation due to

[0203] Of course, the embodiment of the present application is not limited to the case where the reinforcing rib is not provided. Therefore, there may be a plurality of battery arrays 3.

[0204] In the battery pack 200 according to the present application, a battery mounting area is formed in the battery pack 200. The battery array 3 is located in a battery mounting area, and the battery mounting area has N (N (M is 1 or more) battery array 3 along the Y direction and M (M is 1 or more) battery arrays along the Y direction. The battery arrays 3 are electrically connected to each other by connecting members between the electrode terminals of the cells. The power of the last cell in the N-1th (N is 1 or more) battery array 3 is connected. The electrode terminal and the electrode terminal of the first cell in the Nth battery array 3 are connected by a connecting member. In other words, in the battery pack, a plurality of A battery array 3 may be provided, i.e., a plurality of rows of battery arrays 3 may be provided in the battery pack 200. will be established.

[0205] Specifically, as shown in FIG. 21, the first separator 700 is 3 is divided into two battery arrays 3 along the X direction of the battery pack 200. The last cell 100 in the battery array 3 and the first cell in the subsequent battery array 3 are connected by a connecting member are connected by

[0206] In the battery pack 200 according to the present application, a battery mounting area is formed in the battery pack, and the battery The array 3 is located in a battery mounting area, and the battery mounting area has M (M is 1 or more) arrays arranged along the Y direction. The battery arrays 3 are connected to each other by connecting the electrode terminals of the cells. The M-1th (M is 1 or more) battery array 3 is electrically connected by a member. The electrode terminal of the last cell in the Mth battery array 3 and the electrode terminal of the first cell in the Mth battery array 3 are In other words, the plurality of unit cells 10 are connected by the connecting member in the extending direction of the unit cells 100. 0 may be housed, that is, a plurality of rows of battery arrays 3 may be provided in the battery pack 200. do.

[0207] Specifically, as shown in FIG. 20, the second separator 800 separates the battery array 3 into battery panels. The battery array 3 is divided into two along the Y direction of the block 200. The last cell 100 and the first cell in the subsequent battery array 3 are connected by a connecting member. will be done.

[0208] In the battery pack 200 according to the present application, a battery mounting area is formed in the battery pack, and the battery The array 3 is located in a battery mounting area, and the battery mounting area has N (N is 1 or more) arrays arranged along the X direction. a battery array 3 in the Y direction (M is 1 or more); The battery arrays 3 are electrically connected to each other by connecting members between the electrode terminals of the cells. In other words, the battery mounting area is divided into multiple sub-battery mounting areas in the X direction of the battery pack. The battery 100 may be divided into two or more cells 100, and a plurality of cells 100 may be housed in the extending direction Y of the cells 100. That is, the battery pack 200 includes the battery array 3 arranged in multiple rows and multiple columns.

[0209] Specifically, as shown in FIG. 22, a first separator 700 and a A second separator 800 is provided, and the first separator 700 and the second separator 80 0 divides a plurality of cells into two rows and two columns of battery arrays 3. Any two battery arrays 3 are , and the electrode terminals are connected by connecting members.

[0210] In the above description, the first separator 700 and the second separator 800 have reinforcing ribs. It may be other structural members such as insulating cotton, and the present application is not limited thereto. .

[0211] The present application does not particularly limit the number of cells 100 in the battery array 3, and can be applied to different vehicle models and required According to different powers, different numbers of cells 100 can be arranged, and some of the present invention In a specific example, the number of cells in the battery array 3 is 60 to 200. In this specific example, the number of cells in the battery array 3 is 80 to 150.

[0212] In the battery pack 200 according to the present invention, the cells in the battery array 3 are bonded together with an adhesive. The cells 100 are bonded together with an adhesive, which saves space and reduces the number of other structural members. This allows for weight reduction, improved energy density, and improved production efficiency. .

[0213] In one embodiment, the first panel 212 is a heat exchange plate 214 having a cooling structure therein. 19, and by providing a coolant inside the heat exchange plate 219, the coolant This allows the temperature of the battery 100 to be lowered, and the battery 100 to reach a suitable operating temperature. 219 and the unit cell 100 are provided with a heat conduction plate 218, so that the unit cell 100 is cooled by the coolant. When cooling the object, the temperature difference at each position on the heat exchange plate 219 is equalized by the heat conduction plate 218. This makes it possible to control the temperature difference between the plurality of cells 100 to within 1°C.

[0214] The cell 100 may have any suitable structure and shape, and in one embodiment according to the present application As shown in FIG. 3, the cell 100 is a rectangular cell having a rectangular structure. a thickness and a height between the length and the thickness, each cell 100 being placed horizontally; The longitudinal direction of the battery body of each cell 100 is the Y direction, the thickness direction is the X direction, and the height direction is the Y direction. The direction is the Z direction, and two adjacent cells 100 are arranged so that their wide surfaces face each other. In other words, the prismatic battery has a length L in the longitudinal direction and a thickness L perpendicular to the longitudinal direction. The thickness D is in the direction of the length L and the height H is in the height direction, and the height H is between the length L and the thickness D. Specifically, the cell 100 has a wide surface, a narrow surface, and an end surface, and the wide surface has a long side that is The narrow surface has a length L and a short side having the height H, and the long side has the length L and the short side is The end face has the above-mentioned thickness D, and the long side has the above-mentioned height H and the short side has the above-mentioned thickness D. When the cell 100 is placed horizontally, the two end faces of the cell 100 are in the first end bead. The wide surfaces of the two adjacent cells 100 face the first end beam 201 and the second end beam 202. In this way, the cell 100 has a function of replacing the cross beam, In another embodiment, the cell 100 is a cylindrical cell. It is also possible.

[0215] In the prior art, in order to have an appropriate battery capacity and an excellent heat dissipation effect, the single cell 100 How to design the shape and dimensions of the battery is one of the problems to be solved in the field of battery technology. It is one.

[0216] In one embodiment of the present application, the ratio of the length L to the thickness D of the battery body of the single cell 100 is 23 ≦L / D≦208. At this ratio, a cell 100 having a long length and a thin thickness can be obtained. In this way, even when the length of the cell 100 extends along the Y direction, an appropriate resistance value can be obtained. It can ensure a large heat dissipation area and high heat dissipation efficiency, and is suitable for various vehicle models. Highly adaptable to

[0217] In another embodiment of the present application, the ratio of the length L to the height H of the battery body of the cell 100 is 4 ≦L / H≦21, for example, 9≦L / H≦13. This may be achieved by using the thin cell 100 or by adjusting the dimensions. By controlling the ratio of the length L to the height H of the battery body of the battery 100, the single cell 100 can be The thickness of the battery is extended along the Y direction, and a sufficient heat dissipation area is ensured. 00 heat dissipation effect can be guaranteed.

[0218] In the prior art, the dimension L of the unit cell is short, so both ends of the unit cell are directly connected to the end beams. The assembly process requires arranging a plurality of cells first to form a battery array. 3, and end plates and / or side plates are provided on the outside of the battery array 3. The end plate and the side plate are fixed together to surround a space for accommodating the battery array 3, i.e., That is, a battery module is formed, and then the battery module is mounted in a pack. Additional cross beams and / or end beams are provided within the battery pack to accommodate module installation. This process requires complicated assembly, and during the battery pack assembly process The probability of defective products increases, and multiple assembly times can cause the battery pack to loosen and become less firmly attached. This increases the possibility of battery failure, adversely affecting the quality of the battery pack and reducing the stability of the battery pack. This reduces the reliability and reliability of the system.

[0219] Compared with the prior art, in the present application, the dimension L of the unit cells is long. Therefore, when assembling the unit cells into a battery pack, one unit cell 100 is first placed horizontally in the tray, with the first end of the unit cell 100 supported by the first end beam 201, and the other end of the unit cell 100 supported by the second end beam 202. 2 Then, other cells 100 are inserted sequentially along the X direction of the battery pack to form the battery array 3, and then fasteners are used to fix the battery array 3 and attach battery management components and power distribution components. The entire assembly process is simple, and there is no need to assemble battery modules and then install the battery modules into the battery pack; the battery array 3 can be directly formed inside the battery pack, which saves labor and material costs, reduces the defect rate, and improves the stability and reliability of the battery pack.

[0220] Naturally, the present application involves assembling the cells into the battery array 3 and then powering the battery array 3. It may also be mounted within a pond pack, and such embodiments are within the scope of the present claims.

[0221] As shown in FIG. 26, the present application aims to provide a vehicle 1 including the battery pack 200. The purpose of this is 2.

[0222] Vehicle 1 requires a battery pack to provide electrical energy to power its journey. This includes commercial vehicles, special vehicles, electric bicycles, electric motorcycles, electric scooters and other electric vehicles. stomach.

[0223] In some embodiments, the battery pack 200 is mounted on the bottom of the electric vehicle and is supported by a support member 4 is fixedly connected to the chassis of the vehicle 1. The installation space on the chassis of an electric vehicle is large. Therefore, by installing the battery pack 200 on the chassis of the electric vehicle, the number of single cells 100 can be made as large as possible to improve the range of electric vehicles.

[0224] In some embodiments, the vehicle includes a single battery pack located at the bottom of the vehicle, The battery pack is fixedly connected to the chassis of the vehicle and is aligned in the Q direction, along the long side of the smallest circumscribed rectangular parallelepiped of the cell. The Y direction is the width direction of the vehicle body, that is, the left-right direction of the vehicle, and the P direction is the direction of the battery The width direction or X direction of the smallest circumscribed rectangular parallelepiped is the longitudinal direction of the vehicle body, i.e., the front-to-rear direction of the vehicle. In other embodiments, the vehicle may include multiple battery packs located at the bottom of the vehicle. The shape and size of the plurality of battery packs may be the same or different. Each battery pack can be adjusted according to the shape and size of the vehicle chassis, and multiple batteries The packs are arranged along the longitudinal direction of the vehicle body, that is, along the front-to-rear direction.

[0225] In some examples, in one embodiment of the present application, the Q direction of the battery pack 200, the single The ratio of the width L3 in the longitudinal direction or Y direction of the smallest circumscribed rectangular parallelepiped of the pond to the width W of the vehicle body is 50% or less. / W≦80%, and in this embodiment, one battery pack 200 is arranged along the width direction of the vehicle body. When there are multiple battery packs 200, the The packs 200 are arranged along the longitudinal direction of the vehicle body. , the width of the vehicle body is 600mm~2000mm, for example 600mm, 1600mm, 1800mm m, 2000mm, and the body length is 500mm to 5000mm, for passenger cars The width of a passenger car is generally 600mm to 1800mm, and the length of the car body is 600mm to It is 4000mm.

[0226] In some embodiments, the Q direction of the cell 100, the longitudinal direction of the smallest circumscribing rectangular parallelepiped of the cell, or The ratio of the Y-direction dimension L' to the width W of the vehicle body satisfies 46%≦L' / W≦76%. When considering the thickness of the first end beam 201 and the second end beam 202 of the block 200, The ratio of the dimension L of the cell 100 in the Y direction to the width W of the vehicle body satisfies 46%≦L′ / W≦76%. In this embodiment, only one cell 100 is provided along the width direction of the vehicle body. In other possible embodiments, if such dimensional requirements are met, This can be achieved by providing a plurality of battery modules or a plurality of single cells in the hand direction. In one embodiment, the size of the cell 100 in the Y direction is 600 mm to 1500 mm.

[0227] In some embodiments of the present application, both ends of one cell are provided with first end beads. Although a technical means for fitting and supporting the end beam and the second end beam has been applied for, There is a risk that it may not be possible to manufacture a cell with a length dimension that matches the width of the vehicle body. In other words, it is not possible to process the unit cell to the desired length for some reason. Although electric vehicles require a voltage plateau for a single cell, a fixed material system requires a constant This is because the volume of the cell required to reach the voltage plateau is constant. As shown above, if the length of a cell is increased, its thickness or width will be reduced. In order to achieve this, it is necessary to ensure the overall surface area of ​​the battery. By reducing the size, it is not possible to increase the length of the cell, and the height of the vehicle body is limited. Use is limited, and in order to minimize the impact, it is generally necessary to adjust the width (height) of the single cell. Therefore, the length of the cell in the first direction and the thickness in the second direction can be changed. The only thing that can be done to change the overall surface area of ​​the cell is to increase the length. If so, there is a high possibility that the thickness will be reduced. The thickness change has a minimum limit because the cells and related materials must be added inside. , As a result, the length of the cell is affected by the limit value of the thickness, and therefore the length in the first direction The ability to change the length of the cell is also limited, and the length of the cell cannot be increased indefinitely.

[0228] The present application further discloses an energy storage device 2.

[0229] As shown in FIG. 27, the energy storage device 2 of the present invention is the same as that of any of the above-described embodiments. The energy storage device 2 of the present application includes a battery pack 200. Suitable for outdoor power supplies, peak regulating energy storage equipment in power plants, and power supplies for various vehicles. It is possible.

[0230] The embodiments of the present application have been described in detail above with reference to the drawings. The present invention is not limited to the specific content of the present invention, but is applicable to the technical techniques of the present invention within the scope of the technical idea of ​​the present invention. Various simple modifications can be made to the stages, and any of these simple modifications will be covered by the present application. It belongs to the scope of protection.

[0231] It should be noted that the specific technical features described in the above specific embodiments may be used in conjunction with the present invention if they are not inconsistent. , may be combined in any suitable manner, and to avoid unnecessary duplication, the present application , all possible combinations are not separately described.

[0232] Furthermore, various different embodiments of the present application can be arbitrarily combined, and the present application is not contrary to the concept of the present application. Unless otherwise stated, the same shall be deemed to be the content of the present application.

[0233] The following Comparative Example 1 and Examples 1-2, Comparative Example 2 and Examples 4-4, Comparative Example 3 and Example 5 The battery pack 200 according to the embodiment of the present application is described below. By designing parameters, improvements can be made in terms of energy density, etc.

[0234] In the following examples and comparative examples, a lithium iron phosphate battery is used as an example.

[0235] In Comparative Example 1, Example 1, and Example 2, the battery pack 200 has a total volume of 213 L, The total volume occupied by the battery pack case, the internal battery management system, and other power distribution modules The total is 82.54 L, and the actual remaining battery pack 200 cells 100 and / or The capacity of the battery pack is 130.46 L, and the capacity of the battery pack is 130.46 L. The case is 1380mm long, 1005mm wide and 137mm thick. The volume of the electrical box is 22.5L, and the total volume of the battery pack is 213L = 138 0×1005×137×0.000001+22.5. (Comparative Example 1)

[0236] In the conventional battery pack 200, as shown in FIG. Two cross beams 500 and one longitudinal beam 600 are provided in the 500 and one vertical beam 600 divides the cells 100 into six battery modules 400. . [Example]

[0237] As shown in FIG. 21, the battery pack 200 according to the embodiment of the present invention has a cell 100. The longitudinal direction is set along the width direction of the battery pack 200, and the plurality of single cells 100 are The battery pack 200 is arranged in the longitudinal direction of the battery pack 200, and the battery pack 200 is arranged in the width direction of the battery pack 200. The case accommodates one cell 100, and the cell 100 is arranged in the width direction of the battery pack 200. The first separator extends from one side of the battery pack case to the other side. The first separator 700 is provided, the second separator 800 is not provided, and the first separator 70 0 extends along the width direction of the battery pack 200, and the plurality of cells 100 are The first separator 700 is arranged along the longitudinal direction of the battery to form the battery array 400. The battery array 400 is divided into two parts along the longitudinal direction of the battery pack 200. The battery pack 200 has a first end beam 201 and a second end beam 202 located on both sides in the width direction of the battery pack 200. The external beam 202 provides support for the cells 100 and supports the battery pack 100. The third end beam 203 and the fourth end beam 204 are located at both ends of the block 200 in the longitudinal direction. 04 provide an inward pressing force against the adjacent cells 100. A single layer of battery array 400 is contained in the case along the height direction of the battery pack 200. [Example]

[0238] In the battery pack 200 according to the embodiment of the present invention, as shown in FIG. The longitudinal direction is set along the width direction of the battery pack 200, and the plurality of single cells 100 are The battery pack 200 is arranged in the longitudinal direction of the battery pack 200, and the battery pack 200 is arranged in the width direction of the battery pack 200. The case accommodates one cell 100, and the cell 100 is arranged in the width direction of the battery pack 200. The first separator extends from one side of the battery pack case to the other side of the battery pack case. The battery pack case does not have the first separator 700 and the second separator 800. A first end beam 201 and a second end beam 202 are located on both sides of the width of the block 200. The battery pack case provides a support force to the battery cells 100 and the length of the battery pack 200. The third end beam 203 and the fourth end beam 204 located at both ends in the hand direction are The battery pack case provides an inward pressing force to the adjacent cells 100. Two layers of battery arrays 400 are included along the height of the pack 200 .

[0239] As can be seen by comparing the above Comparative Example 1 with Examples 1 to 3, those skilled in the art In comparison with the battery pack 200 in the embodiment of the present application, the battery pack 200 in the embodiment of the present application has By designing the arrangement of 0, dimensional parameters and other factors, the module formation rate is It can break through the limits of Block 200 and achieve higher energy density. do.

[0240] In Comparative Example 2, Example 3, and Example 4, the battery pack 200 has a total volume of 310 L, The total volume occupied by the battery pack case, the internal battery management system, and other power distribution modules The total volume is 90L, and the remaining battery pack cells 100 and / or first separators The battery pack case has a volume of 220L that can accommodate the battery, the second separator, and the length 1580mm, width 1380mm, thickness 137mm, electrical box The volume of the battery pack is 11L, and the total volume of the battery pack is 310L = 1580 × 1380 × 137 × It is 0.000001+11. (Comparative Example 2)

[0241] The arrangement of the cells in the battery pack is the same as that in the first comparative example. [Example]

[0242] As shown in FIG. 20, the battery pack 200 according to the embodiment of the present invention has a cell 100. The longitudinal direction is set to be along the longitudinal direction of the battery pack 200, and the plurality of single cells 100 are , are arranged along the width direction of the battery pack 200, and are arranged along the length direction of the battery pack 200. The back case accommodates one cell 100, and the cell 100 is arranged along the longitudinal direction of the battery pack 200. The battery pack case has a second end extending in the direction from one side to the other. The separator 800 is provided, the cross beam 500 is not provided, and the second separator 80 0 extends along the longitudinal direction of the battery pack 200, and the plurality of cells 100 are The second separator 800 is arranged along the width direction of the battery cell array 400. The battery array 400 is divided into two parts along the width direction of the battery pack 200. The third end beam 203 and the fourth end beam 204 are located at both ends of the battery pack 200 in the longitudinal direction. The external beam 204 provides support for the cells 100 and supports the battery pack 100. The first end beam 201 and the second end beam 202 are located on both sides of the width of the block 200. 2 provide an inward pressing force against the adjacent cells 100. The battery pack 200 includes a two-layer battery array 400 arranged along its height in the case. [Example]

[0243] As shown in FIG. 24, the battery pack 200 according to the embodiment of the present invention has a cell 100. The longitudinal direction is set to be along the longitudinal direction of the battery pack 200, and the plurality of single cells 100 are , are arranged along the width direction of the battery pack 200, and are arranged along the length direction of the battery pack 200. The back case accommodates one cell 100, and the cell 100 is arranged along the longitudinal direction of the battery pack 200. The battery pack 2 extends from one side of the battery pack case to the other side in the same direction. The third end beam 203 and the fourth end beam 204 located at both ends of the longitudinal direction of the 00 are , which provides support for the cells 100 and extends in the width direction of the battery pack 200 of the battery pack case. The first end beam 201 and the second end beam 202 located on both sides of the beam are It applies an inward pressing force to the contacting cells 100. The battery array 400 includes two layers along the height direction of the building 200 .

[0244] In Comparative Example 3 and Example 5, the battery pack 200 has a total volume of 414 L. The total volume occupied by the back case, internal battery management system, and other power distribution modules is 102 L, and the remaining volume of the battery pack that can accommodate the cells 100 is 312 L. The battery pack case is 2130mm long, 1380mm wide and 1380mm thick. 37mm, the volume of the electrical box is 11L, and the total volume of the battery pack is 414L = 2130×1380×137×0.000001+11. (Comparative Example 3)

[0245] The arrangement of the cells was the same as that in Comparative Example 1. [Example]

[0246] The arrangement of the cells in the battery pack is the same as that in the fourth embodiment. [Example]

[0247] In this embodiment, the battery pack 200 has a total volume of 508 L, and the battery pack case The total volume occupied by the internal battery management system and other power distribution modules is 119 L. The actual remaining volume of the battery pack, which can accommodate 100 cells, is 389 L. The case is 2630mm long, 1380mm wide and 137mm thick. The volume of the electrical box is 11L, and the total volume of the battery pack is 414L = 2630 x 1 380 x 137 x 0.000001 + 11. Arrangement of cells in a battery pack is the same as the arrangement method in the fourth embodiment.

[0248] Table 1 shows specific parameters for Examples 1 to 6 and Comparative Examples 1 and 2.

[0249] Table 1 [Table 1]

[0250] The following describes the battery pack 20 according to the embodiment of the present invention with reference to Comparative Example 4 and Examples 7 to 11. By designing the dimensional parameters of the single cell 100, the heat dissipation effect can be improved. To rise.

[0251] The cells in Comparative Example 4 and Examples 7 to 11 were rapidly charged at a rate of 2C. The temperature rise of the single cell during the charging process is measured. The selection of cell length, width, thickness, volume, surface area and energy parameters is recorded. and the specific temperature rise is recorded.

[0252] Table 2 [Table 2]

[0253] As can be seen from the data in the table, the cell 100 according to the present invention is capable of rapid charging under the same conditions. As a result, the temperature rise is reduced to a different extent compared to the comparative example, and the heat dissipation effect is superior to that of the conventional technology. When the cells 100 are assembled into a battery pack, the temperature rise of the battery pack is also In contrast, it decreases.

[0254] As can be seen by comparing the above comparative examples with the examples, those skilled in the art will understand that the electric The battery pack 200 is designed to accommodate the cells 100 by their arrangement, dimensional parameters, and other factors. The utilization rate can break through the limitations of the conventional battery pack 200, and the energy density can be increased. This improvement in energy density is expected to be achieved in the battery pack 2. 00 is enlarged as the total volume increases, that is, the larger the volume of the battery pack 200, The effect of improving the energy density by the technical means of the embodiment of the present application becomes remarkable.

[0255] In the description herein, the terms "one embodiment," "some embodiments," and "exemplary implementations" may be used interchangeably. Reference to the description as "examples," "examples," "specific examples," or "some examples" means that the examples or examples are The specific features, structures, materials or characteristics described in the examples are not necessarily consistent with at least one of the present application. In this specification, the exemplary list of the above terms is meant to be included in one embodiment or example. The present invention is not necessarily limited to the same embodiment or example. Any features, structures, materials or characteristics may be suitably combined in any one or more embodiments or examples. can be combined.

[0256] While embodiments of the present application have been illustrated and described, it will be understood by those skilled in the art that the principles and Various changes, modifications, substitutions and variations may be made to these embodiments without departing from the spirit of the invention. The scope of this application is limited by the claims and their equivalents. [Explanation of symbols]

[0257] 1. Vehicle; 2. Energy storage device; 3 Battery array 4 Support member 100 Cell 101 First electrode terminal 102 second electrode terminal 103 explosion-proof valve 104 Reinforced shell 105 Pouch cell 200 Battery pack 201 First end beam 202 second end beam 203 third end beam 204 fourth end beam 205 first elastic shock absorber 206 second elastic device 207 first end plate 208 second end plate 209 first side plate 210 second side panel 211 second panel 212 first panel 213 first support plate 214 second support plate 215 first connection surface 216 Second connecting surface 217 Thermal insulation layer 218 Heat conduction plate 219 Heat exchange plate 221 Intake port 222 Exhaust passage 235 Fourth connecting surface 236 Third connecting surface 233 Second connecting plate 234 Side plate body 232 first connecting plate 231 end plate body 700 First separator 800 Second separator 300 space 301 first side wall 302 second side wall 305 bottom of space 400 Battery module 500 Cross beam 501 First beam 502 Second beam 600 vertical beam L Dimension of the cell along the Y direction D Dimension along the X direction of the cell H Dimension of the cell along the Z direction L1: The distance between the first and second ends of the cell L2 Distance between the inner surface of the first end beam and the inner surface of the second end beam / the first side wall Distance along the first direction between the second sidewall L3 Battery pack width in Y direction

Claims

1. A battery pack including a battery array and a support member, the battery array includes a plurality of unit cells, at least one unit cell includes a battery body and an electrode terminal extending from the battery body to draw out an internal current of the battery body, the battery body is a substantially rectangular parallelepiped, the length of the battery body is L and satisfies 600 mm≦L≦2500 mm, the at least one unit cell is supported by the support member, a battery mounting area is formed in the battery pack, the battery array is located in the battery mounting area, and each of the plurality of single cells extends from one side of the battery mounting area to the other side of the battery mounting area along an L direction; a reinforcing member that reinforces the case, each of the plurality of single cells having an electrode terminal that draws an internal current, the reinforcing member including a current joining member that is configured to electrically connect the electrode terminals of the plurality of single cells, and the support member that supports the at least one single cell together with the current joining member.

2. 2. The battery pack according to claim 1, wherein the battery body has a thickness D and a height H, a thickness direction being the X direction, a longitudinal direction being the Y direction, and a height direction being the Z direction.

3. 3. The battery pack according to claim 2, wherein the plurality of unit cells are arranged along an X direction of at least one unit cell in the battery array.

4. 4. The battery pack according to claim 3, wherein at least one of the cells satisfies 10≦L / D≦208.

5. 5. The battery pack according to claim 4, wherein at least one of the cells satisfies 23≦L / D≦208.

6. 6. The battery pack according to claim 5, wherein at least one of the cells satisfies 50≦L / D≦70.

7. The battery pack according to claim 2 , wherein the plurality of unit cells are arranged along the Z direction of the at least one unit cell in the battery array.

8. 8. The battery pack according to claim 7, wherein at least one of the cells satisfies 10≦L / H≦208.

9. 9. The battery pack according to claim 8, wherein at least one of the cells satisfies 23≦L / H≦208.

10. 10. The battery pack according to claim 9, wherein at least one of the cells satisfies 50≦L / H≦70.

11. The volume of each of the plurality of cells is V, and at least one cell has a volume of 0.0005 mm －２ ≦L / V≦0.002mm －２ 2. The battery pack according to claim 1, wherein the above formula is satisfied.

12. 2. The battery pack according to claim 1, wherein at least one of the cells satisfies 600 mm≦L≦1500 mm.

13. 13. The battery pack according to claim 12, wherein at least one of the cells satisfies 600 mm≦L≦1000 mm.

14. 13. The battery pack according to claim 12, wherein the battery body has a thickness D and a height H, a thickness direction being an X direction, a longitudinal direction being a Y direction, and a height direction being a Z direction, the height H of the battery body being greater than or equal to the thickness D of the battery body, the at least one unit cell satisfying 23≦L / D≦208 and 4≦L / H≦21, and the multiple unit cells are arranged along the X direction of the at least one unit cell in the battery array.

15. 15. The battery pack according to claim 14, wherein at least one of the cells satisfies 9≦L / H≦13.

16. The battery body has a volume V and a surface area S, and the relationship between the surface area S and the volume V is 0.1 mm －１ ≦S / V≦0.35mm －１ 13. The battery pack according to claim 12,

17. The battery pack according to claim 14 , further comprising two side plate members provided on both sides of the battery array in opposition to each other along the X direction and sandwiching the battery array therebetween.

18. 15. The battery pack of claim 14, wherein the battery pack includes a tray including a first end beam and a second end beam arranged opposite each other along the Y direction, the support members being a first end beam and a second end beam, and both ends of at least one single battery are supported by the first end beam and the second end beam, respectively.

19. 19. The battery pack of claim 18, wherein the first end beam and the second end beam each include an inner wall surface that fits to two end faces of a single battery cell, and an insulating plate is disposed between the inner wall surfaces of the first end beam and the second end beam and the end faces of the single battery cell.

20. 19. The battery pack of claim 18, wherein the tray includes a bottom plate, the first end beam and the second end beam are respectively provided at opposite ends of the bottom plate, and each of the plurality of single cells and the bottom plate are spaced apart from each other.

21. 21. The battery pack according to claim 20, further comprising a heat-insulating layer provided between the plurality of cells and the bottom plate.

22. The battery pack according to claim 20 , further comprising a sealing cover forming, together with the tray, a storage space for storing the battery array.

23. the first end beam has a first support plate, the first support plate protruding from an inner wall surface of the first end beam facing the cell, the first support plate having a first support surface on a surface facing the sealing cover, and a first mounting surface on a surface of the first support plate facing away from the sealing cover; the second end beam has a second support plate, the second support plate protruding from an inner wall surface of the second end beam facing the cell, the second support plate having a second support surface on a surface facing the sealing cover, and a second mounting surface on a surface of the second support plate facing away from the sealing cover; 23. The battery pack of claim 22, wherein the first support surface and the second support surface are for supporting at least one battery cell, and the first mounting surface and the second mounting surface are for mounting the bottom plate.

24. the first end beam has a first connection surface that connects to an inner wall surface of the first end beam that faces the cell, and a distance from the first connection surface to the sealing cover is smaller than a distance from the first support surface to the sealing cover; the second end beam has a second connection surface that connects to an inner wall surface of the second end beam that faces the cell, and a distance from the second connection surface to the sealing cover is smaller than a distance from the second support surface to the sealing cover; 24. The battery pack according to claim 23, wherein both ends of a plurality of unit cells are in contact with the first connection surface and the second connection surface, respectively.

25. The first end beam has at least two step structures on an inner wall surface facing the unit cell, and the surfaces of the two steps facing the sealing cover form the first connection surface and the first support surface, respectively; 25. The battery pack of claim 24, wherein the second end beam has at least two step structures on an inner wall surface facing the single cell, and the surfaces of the two steps facing the sealing cover respectively form the second connection surface and the second support surface.

26. 25. The battery pack of claim 24, further comprising: a first end plate provided between a first end of at least one cell and a first end beam; and a second end plate provided between a second end of at least one cell and the second end beam, wherein the first end of at least one cell is connected to the first connection surface via the first end plate, and the second end of at least one cell is connected to the second connection surface via the second end plate.

27. the first end plate includes an end plate body provided to face each end surface of the plurality of unit cells, and a first connection plate connected to the end plate body and protruding toward the first end beam, the second end plate includes an end plate body provided to face each end surface of the plurality of unit cells, and a first connection plate connected to the end plate body and protruding toward the second end beam, 27. The battery pack according to claim 26, wherein the first connection plate is connected to the first connection surface and the second connection surface.

28. The battery pack according to any one of claims 18 to 27, characterized in that an explosion-proof valve is provided at a first end of at least one single battery, an exhaust passage is provided inside the first end beam, and an exhaust hole is provided in the first end beam at a position corresponding to the explosion-proof valve, the exhaust hole being connected to the exhaust passage, an explosion-proof valve is provided at a second end of the single battery, an exhaust passage is provided inside the second end beam, and an exhaust hole is provided in the second end beam at a position corresponding to the explosion-proof valve, the exhaust hole being connected to the exhaust passage, and the battery pack is provided with an exhaust port communicating with the exhaust passage.

29. 23. The battery pack of claim 22, wherein the tray further includes a third end beam and a fourth end beam disposed opposite each other along an X direction, the third end beam and the fourth end beam providing a pressing force to the battery array.

30. 28. The battery pack according to claim 27, wherein a management accommodation space for accommodating battery management components and power distribution components is defined between the first connection surface, the second connection surface, the cell, and the sealing cover.

31. a first resilient device disposed resiliently sandwiched between the third end beam and a cell adjacent to the third end beam; and / or 30. The battery pack of claim 29, further comprising a second resilient device disposed in a resiliently sandwiched relationship between the fourth end beam and a cell adjacent to the fourth end beam.

32. a first side plate provided between the third end beam and a cell adjacent to the third end beam; and / or 30. The battery pack of claim 29, further comprising a second side plate disposed between the fourth end beam and a cell adjacent the fourth end beam.

33. The first side plate includes a side plate body provided to face a side surface of the unit cell, and a second connection plate connected to the side plate body and protruding toward the third end beam, the second side plate includes a side plate body provided to face a side surface of the unit cell, and a second connection plate connected to the side plate body and protruding toward the fourth end beam, the third end beam is provided with a third connection surface towards the sealing cover, and the fourth end beam is provided with a fourth connection surface towards the sealing cover, the first side plate is connected to the third connection surface by a corresponding second connection plate; 33. The battery pack according to claim 32, wherein the second side plate is connected to the fourth connection surface by a corresponding second connection plate.

34. a first panel and a second panel connected to an upper surface and a lower surface, respectively, of at least some of the cells; A first end plate and a second end plate provided on two end surfaces of at least some of the unit cells, respectively; a first side plate and a second side plate provided on two outermost end surfaces of at least a portion of the plurality of unit cells, the first end plate, the second end plate, the first side plate, and the second side plate are all connected to the first panel and the second panel; the first end beam has a first support surface and a first connection surface on an inner wall surface facing the cell, and the second end beam has a second support surface and a second connection surface on an inner wall surface facing the cell; a first end of at least one cell is supported on the first support surface, a second end of the at least one cell is supported on the second support surface, the first end plate is connected to the first connection surface, and the second end plate is connected to the second connection surface; 30. The battery pack of claim 29, wherein the third end beam has a third connection surface on an inner wall surface facing the cell, the fourth end beam has a fourth connection surface on an inner wall surface facing the cell, the first side plate is connected to the third connection surface, and the second side plate is connected to the fourth connection surface.

35. The battery pack according to any one of claims 2 to 16, wherein the support members are a plurality of bottom beams, the bottom beams being located below the battery array.

36. The battery pack of claim 35, characterized in that the bottom beam includes a first beam and a second beam located on the first beam and intersecting the first beam, an angle between the extension direction of the first beam and the Y direction is 60 to 90 degrees, and at least one single battery is supported by the first beam.

37. 37. The battery pack of claim 36, wherein there are two second beams, each of the two second beams is located at either end of the first beam and perpendicular to the first beam, and the single battery is supported by the first beams.

38. 38. The battery pack of claim 37, wherein the center of each of the plurality of cells is located on the first beam.

39. The battery pack of claim 35, characterized in that the bottom beam is a plurality of rectangular beams arranged in parallel and spaced apart relation, the angle between the extension direction of the rectangular beams and the Y direction is 60 to 90 degrees, and the single battery is supported by the rectangular beams.

40. 40. The battery pack of claim 39, wherein the rectangular beams are uniformly distributed along the Y direction, the extension direction of the rectangular beams is perpendicular to the Y direction, and at least one single battery is located on the rectangular beam.

41. 17. The battery pack according to claim 1, wherein the support member is a chassis of an automobile, and the battery array is positioned on the chassis of the automobile.

42. A battery pack as described in any one of claims 2 to 27 or 29 to 34, characterized in that a battery mounting area is formed within the battery pack, the battery array is located in the battery mounting area, the battery pack includes one battery array, and each of a plurality of single cells extends from one side of the battery mounting area to the other side of the battery mounting area along the Y direction.

43. 35. The battery pack according to claim 1, wherein a battery mounting area is formed within the battery pack, the battery array is located in the battery mounting area, the battery pack includes N battery arrays (N is 1 or more) arranged along an X direction, and the battery arrays are electrically connected to each other by connecting members between electrode terminals of single cells.

44. The battery pack according to claim 43, wherein an electrode terminal of a last cell in the (N-1)th battery array and an electrode terminal of a first cell in the Nth battery array are connected by a connecting member.

45. A battery pack as described in any one of claims 2 to 27 or 29 to 34, characterized in that a plurality of battery mounting areas are formed within the battery pack, the battery pack includes M (M is 1 or more) battery arrays distributed along the Y direction and positioned in the plurality of battery mounting areas in one-to-one correspondence, and the battery arrays are electrically connected to each other by connecting members between the electrode terminals of the single cells.

46. The battery pack according to claim 45, wherein an electrode terminal of a last cell in the (M-1)th battery array and an electrode terminal of a first cell in the Mth battery array are connected by a connection member.

47. 35. The battery pack according to claim 2, wherein a plurality of battery mounting areas are formed within the battery pack, the battery pack includes N battery arrays (N is 1 or more) arranged along an X direction and M battery arrays (M is 1 or more) arranged along a Y direction, the battery arrays are positioned in one-to-one correspondence in the plurality of battery mounting areas, and the battery arrays are electrically connected to each other by connecting members between electrode terminals of single cells.

48. The battery pack according to any one of claims 1 to 27 or 29 to 34, characterized in that a battery mounting area is formed within the battery pack, the battery array is located in the battery mounting area, the battery pack includes J (J is 1 or more) battery arrays arranged along the Z direction, and the battery arrays are electrically connected to each other by connecting members between electrode terminals of single cells.

49. 2. The battery pack according to claim 1, wherein at least some of the cells in the battery array are bonded together with an adhesive.

50. The volume of the battery body is V, and the relationship between the height H of the battery body and the corresponding volume V of the battery body is as follows: 0.0001mm －２ ≦H / V≦0.00015mm －２ 3. The battery pack according to claim 2, wherein:

51. A battery pack according to any one of claims 1 to 27, 29 to 34, and 49 to 50, A vehicle, characterized in that the battery pack is provided at a bottom of the vehicle, and the support member is fixedly connected to a chassis of the vehicle.

52. a first dimension is a maximum value of a distance between two parallel planes that virtually sandwich a single battery, and a Q direction is a normal direction of the two parallel planes that corresponds to the first dimension, When the minimum value of the gap between two parallel planes that virtually sandwich the unit cell is defined as a second dimension, and the normal direction of the two parallel planes that correspond to the second dimension is defined as a P direction, 52. The vehicle of claim 51, wherein the vehicle includes one battery pack provided at the bottom of the vehicle, and the Q direction, the longitudinal direction of the smallest circumscribing rectangular parallelepiped of the single battery or the Y direction is set to be along the vehicle body width direction of the vehicle, and the P direction, the width direction of the smallest circumscribing rectangular parallelepiped of the single battery or the X direction is set to be along the vehicle body longitudinal direction of the vehicle.

53. The width L3 of the battery pack in the Q direction or the lengthwise direction or Y direction of the smallest circumscribing rectangular parallelepiped of the single cell and the width W of the vehicle body are 50%≦L3 / W≦80% 53. The vehicle of claim 52, wherein:

54. 53. The vehicle according to claim 52, wherein the dimension L' of the cell in the Q direction or the longitudinal direction or Y direction of the smallest circumscribed rectangular parallelepiped of the cell and the width W of the vehicle body satisfy 46%≦L' / W≦76%.

55. 52. The vehicle according to claim 51, wherein the width W of the vehicle body is between 600 mm and 2000 mm.

56. An energy storage device comprising a battery pack according to any one of claims 1 to 50.

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