Battery pack shell and battery pack

Abstract

The invention discloses a battery pack shell and a battery pack, the battery pack shell comprises a shell and at least one longitudinal beam, the longitudinal beam is mounted in the shell, the longitudinal beam is used for dividing the space in the shell into at least two battery cell mounting spaces, and the battery cell mounting spaces are used for mounting battery cells; wherein a first buffer part and a first colloid part are arranged on the side face, facing the interior of the battery cell mounting space, of the longitudinal beam, the first buffer part elastically abuts against the longitudinal beam and the battery cell, and the longitudinal beam and the battery cell are bonded through the first colloid part. According to the battery pack shell disclosed by the embodiment of the invention, the longitudinal beam in the battery pack shell is provided with the first buffer part for buffering the battery cell, and the longitudinal beam and the battery cell are bonded into a whole through the first colloid part, so that the integrity between the longitudinal beam and the battery cell is improved, and the structural strength of the battery pack shell is improved.

Description

Technical Field

[0001] This invention relates to the field of battery technology, and more particularly to a battery pack housing and a battery pack. Background Technology

[0002] A battery pack is a module composed of multiple battery cells connected in series and parallel. It is then combined with components such as an electrical system, thermal management system, enclosure, and battery management system (BMS) to form a complete battery pack. The battery cell is the basic unit of the battery pack. They are combined in series and parallel to form modules, and then the modules are assembled into a battery pack.

[0003] However, current battery packs suffer from poor overall integrity and stability, poor buffering effect, and structural strength needs to be improved. Summary of the Invention

[0004] This invention aims to at least solve one of the technical problems existing in the prior art. To this end, this invention proposes a battery pack housing, wherein the longitudinal beams inside the battery pack housing are provided with a first buffer portion to buffer the battery cells, and the longitudinal beams are bonded to the battery cells as a whole through a first adhesive portion, thereby improving the integrity between the longitudinal beams and the battery cells and improving the strength of the battery pack housing.

[0005] According to an embodiment of the present invention, a battery pack housing includes: an outer shell and at least one longitudinal beam, the longitudinal beam being installed inside the outer shell and used to divide the space inside the outer shell into at least two cell mounting spaces, the cell mounting spaces being used to install cells; wherein, the side of the longitudinal beam facing the cell mounting space is provided with a first buffer portion and a first adhesive portion, the first buffer portion elastically pressing against the longitudinal beam and the cell, and the first adhesive portion bonding the longitudinal beam and the cell together.

[0006] According to an embodiment of the present invention, the battery pack housing has a first buffer portion and a first adhesive portion on the side of the longitudinal beam facing the cell mounting space. After the cell is placed in the cell mounting space, the side of the cell is pressed against the first buffer portion, and is bonded to the longitudinal beam through the first adhesive portion. This achieves buffering of the cell while improving the integrity of the cell and the battery pack housing, thus improving stability.

[0007] According to an embodiment of the present invention, the first gel portion and the first buffer portion are distributed along the vertical direction of the longitudinal beam in the battery pack housing.

[0008] According to an embodiment of the present invention, in the battery pack housing, the vertical extension height of the first buffer portion along the longitudinal beam is greater than the vertical extension height of the first gel portion along the longitudinal beam.

[0009] According to an embodiment of the present invention, in the battery pack housing, the vertical extension height of the first gel portion along the longitudinal beam is less than 1 / 2 of the height of the longitudinal beam.

[0010] According to an embodiment of the present invention, the battery pack housing further includes a bottom plate, the bottom plate being provided with a second adhesive portion, and a reserved space being left on one side of the longitudinal beam and at the bottom of the first buffer portion, the battery cell being bonded to the second adhesive portion and a portion of the second adhesive portion being squeezed into the reserved space.

[0011] According to an embodiment of the present invention, in the battery pack housing, the vertical extension height of the first gel portion along the longitudinal beam is greater than the vertical extension height of the second gel portion along the longitudinal beam.

[0012] According to an embodiment of the present invention, in the battery pack housing, the extension length of the first gel portion along the length direction of the longitudinal beam is less than the extension length of the longitudinal beam.

[0013] According to an embodiment of the present invention, the battery pack housing further includes an end beam, the end beam being parallel to the longitudinal beam, and the end beam having a second buffer portion on the side facing the longitudinal beam, the second buffer portion extending vertically along the longitudinal beam having a greater vertical extension height than the first buffer portion extending vertically along the longitudinal beam.

[0014] According to an embodiment of the present invention, in the battery pack housing, the height of the battery cell is higher than the height of the longitudinal beam.

[0015] This invention also discloses a battery pack, including the battery pack housing described above.

[0016] The advantages of the battery pack compared to the prior art are the same as those of the battery pack casing compared to the prior art, and will not be elaborated here.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the overall structure of the battery pack housing according to an embodiment of the present invention, with battery cells partially installed.

[0020] Figure 2 This is a partial structural diagram of the battery pack casing according to an embodiment of the present invention. Figure 1 ;

[0021] Figure 3 This is a partial structural diagram of the battery pack casing according to an embodiment of the present invention. Figure 2 ;

[0022] Figure 4This is a schematic diagram of the overall structure of the battery pack casing according to an embodiment of the present invention. Figure 2 ;

[0023] Figure 5 This is a schematic diagram of the structure of a battery pack housing containing battery cells according to an embodiment of the present invention.

[0024] Figure label:

[0025] 1. Outer shell, 11. Longitudinal beam, 111. First buffer part, 112. First colloid part, 113. Second colloid part, 114. Reserved space, 12. Battery cell installation space, 13. Base plate, 14. End beam, 141. Second buffer part, 15. Battery cell, 16. Crossbeam, 17. Cover plate, 18. Flexible circuit board, 19. Support cotton, 20. Electrical control installation space. Detailed Implementation

[0026] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0027] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0029] The following is for reference. Figures 1-5According to an embodiment of the present invention, a battery pack housing is provided with a first buffer portion 111 and a first adhesive portion 112 on the side of the longitudinal beam 11 facing the cell mounting space 12. After the cell 15 is placed in the cell mounting space 12, the side of the cell 15 is pressed against the first buffer portion 111 and is bonded to the longitudinal beam 11 by the first adhesive portion 112. This achieves buffering of the cell 15 while improving the integrity of the cell 15 and the battery pack housing, thereby improving stability.

[0030] This invention provides a battery pack housing, comprising: an outer shell 1 and at least one longitudinal beam 11; the longitudinal beam 11 is installed inside the outer shell 1 and is used to divide the space inside the outer shell 1 into at least two cell mounting spaces 12, the cell mounting spaces 12 being used to mount cell 15; wherein, the side of the longitudinal beam 11 facing the cell mounting space 12 is provided with a first buffer portion 111 and a first adhesive portion 112, the first buffer portion 111 elastically pressing against the longitudinal beam 11 and the cell 15, and the first adhesive portion 112 bonding the longitudinal beam 11 and the cell 15 together.

[0031] In practice, the battery pack casing includes an outer shell 1 and at least one longitudinal beam 11. For example, the outer shell 1 can be provided with two longitudinal beams 11, which divide the inner part of the outer shell 1 into three cell mounting spaces 12. Multiple cells 15 can be installed in each cell mounting space 12, which is equivalent to a battery module. The longitudinal beam 11 has a first buffer part 111 and a first gel part 112 on the side facing the cell mounting space 12. For example, the longitudinal beam 11 has two sides, and each side has a first buffer part. 111 and the first colloidal portion 112, such as the first colloidal portion 112 being located above the first buffer portion 111, or the first colloidal portion 112 being located below the first buffer portion 111, the first colloidal portion 112 being a structural adhesive, a type of adhesive with high strength and good durability, mainly used for structural bonding that bears heavy loads; the structural adhesive is mainly made of modified silane polymers or polyurethane and other materials, which have excellent molecular structure stability and chemical bond energy, and can form a stable chemical bond on the material surface, thereby providing extremely strong bonding strength.

[0032] Specifically, the first colloid portion 112 not only connects the longitudinal beam 11 and the battery cell 15, but also absorbs and disperses the vibration and impact forces generated during the use of the battery module, preventing relative movement between the battery cells 15, thereby maintaining the stability and integrity of the battery module structure.

[0033] The first buffer section 111 can be made of foam, which is a material made of foamed plastic particles. Foam has the advantages of elasticity, light weight, quick pressure-sensitive fixing, convenient use, flexible bending, and reliable performance. The first buffer section 111 can be connected to the longitudinal beam 11, or the longitudinal beam 11 can be configured to protrude towards the side of the battery cell mounting space 12 and at least the protruding material can be made of buffer material to form the first buffer section 111. It can be selectively configured according to the actual situation.

[0034] In other words, after designing the first buffer portion 111 and the first adhesive portion 112 on the side of the longitudinal beam 11, multiple battery cells 15 are installed in the battery cell installation space 12. The side of the battery cell 15 is in contact with the first buffer portion 111 and is also bonded to the longitudinal beam 11 through the first adhesive portion 112, thereby improving the stability of the multiple battery cells 15 and the battery pack shell and the structural strength of the battery pack shell. Moreover, the first adhesive portion 112 is a structural adhesive, which can also achieve the function of insulation. In addition, the first buffer portion 111 provides a buffering force between the battery cell 15 and the longitudinal beam 11, maintaining the bonding stability between the battery cell 15 and the longitudinal beam 11 while avoiding the need for structural adhesive to be provided on the entire side of the longitudinal beam 11, thereby saving the amount of structural adhesive used.

[0035] Therefore, in this embodiment of the invention, the longitudinal beam 11 inside the battery pack housing is provided with a first buffer portion 111 to buffer the battery cell 15, and a first adhesive portion 112 to bond the longitudinal beam 11 and the battery cell 15 together, which improves the integrity between the longitudinal beam 11 and the battery cell 15 and the stability of the battery cell 15, and also improves the strength of the battery pack housing. When the battery cell 15 moves or shakes, it is easy to damage the battery cell 15 or cause a short circuit. The first adhesive portion 112 can reduce the movement of the battery cell 15, improve the stability of the battery cell 15, and thus improve the strength of the battery pack housing. The first buffer portion 111 also has a certain buffering effect to protect the battery cell 15.

[0036] In some embodiments, the first colloidal portion 112 and the first buffer portion 111 are distributed along the vertical direction of the longitudinal beam 11.

[0037] In other words, the upper end of the battery cell 15 is bonded to the longitudinal beam 11 through the first adhesive portion 112. The side of the battery cell 15 and the lower side of the first adhesive portion 112 are pressed against the first buffer portion 111 of the longitudinal beam 11. When the battery cell 15 is installed in the battery cell installation space 12, the sealing and stability of the installation between the upper part of the battery cell 15 and the longitudinal beam 11 are improved. This is equivalent to connecting multiple battery cells 15 with the battery pack housing as a whole, which improves the overall strength of the battery pack housing and the battery cells 15.

[0038] The first buffer portion 111 is located on the side of the longitudinal beam 11 and below the first gel portion 112. The upper part of the side of the battery cell 15 is bonded to the first gel portion 112, which improves the stability of the upper part of the battery cell 15. Since the bottom of the battery cell 15 can be supported by the battery pack shell, the stability of the upper part of the battery cell 15 can be improved, thus ensuring the stability and structural strength of the entire battery cell 15. The lower part of the side of the battery cell 15 is pressed against the first buffer portion 111, thereby improving the buffering performance of the battery pack shell when it is hit.

[0039] In some embodiments, the vertical extension height of the first buffer portion 111 along the longitudinal beam 11 is greater than the vertical extension height of the first colloidal portion 112 along the longitudinal beam 11.

[0040] The longitudinal beam 11 runs vertically up and down, meaning that the side of the battery cell 15 is bonded to the first adhesive portion 112. By setting a larger vertical extension height of the first buffer portion 111, the buffer area between the battery cell 15 and the longitudinal beam 11 is increased, providing better protection for the battery cell 15. Conversely, setting a smaller vertical extension height of the first adhesive portion 112 ensures that the bonding between the battery cell 15 and the longitudinal beam 11 is both structurally sound and strong, while saving on the amount of structural adhesive used. For example, if the height of the longitudinal beam 11 is 3mm, the first buffer portion 111 can be set to 1.8mm, and the first adhesive portion 112 can be set to 0.8mm, 0.9mm, 1mm, etc.

[0041] In some embodiments, the vertical extension height of the first colloidal portion 112 along the longitudinal beam 11 is less than 1 / 2 of the height of the longitudinal beam 11.

[0042] Similarly, when the height of the longitudinal beam 11 is 3mm, the first adhesive part 112 can be set to 0.8mm, which is less than 1 / 2 of the height of the longitudinal beam 11. This can save the amount of structural adhesive used and can bond the upper part of the side of the battery cell 15 to the longitudinal beam 11, improving the strength, integrity and stability of the connection between the battery cell 15 and the battery pack housing. At the same time, it also leaves more space for the first buffer part 11, so that while ensuring the structural strength of the battery pack housing and the battery cell 15, a better buffering effect can be achieved when the battery pack housing is subjected to side impact force, thereby achieving a better protection effect for the battery cell 15.

[0043] In some embodiments, the battery pack housing further includes a bottom plate 13, the bottom plate 13 having a second adhesive portion 113, one side of the longitudinal beam 11 having a reserved space 114 at the bottom of the first buffer portion 111, the battery cell 15 being bonded to the bottom plate 13 through the second adhesive portion 113 and a portion of the second adhesive portion 113 being squeezed into the reserved space 114.

[0044] In practice, if a battery cell mounting space 12 is formed between the two longitudinal beams 11 and the bottom plate 13 of the housing, and multiple battery cells 15 are placed in the battery cell mounting space 12, the bottom plate 13 of the housing is provided with a second adhesive portion 113. For example, the bottom plate 13 of the housing can be divided into a middle area and two end areas near the longitudinal beams 11. The two end areas near the longitudinal beams 11 are connected to the longitudinal beams 11. The second adhesive portion 113 is applied to the middle area. After multiple battery cells 15 are placed in the middle area, the multiple battery cells 15 squeeze the second adhesive portion 113 in the middle area, so that a part of the second adhesive portion 113 is squeezed to the reserved space 114 near the longitudinal beams 11 and at the bottom of the first buffer portion 111. The second adhesive portion 113 contacts the longitudinal beams 11 and finally solidifies and bonds, which improves the stability of the bottom of the battery cell 15. Combined with the aforementioned design of the first adhesive portion 112 which improves the stability of the upper part of the battery cell 15, the stability of both the top and bottom of the battery cell 15 is improved, reducing the vibration of the battery cell 15 when the vehicle vibrates.

[0045] Meanwhile, the side of the battery cell 15 facing the longitudinal beam 11 can be divided into an upper side, a lower side, and a middle side. The upper side of the battery cell 15 is bonded to the first adhesive part 112, the middle side is pressed with the first buffer part 111, and the lower side is bonded to the second adhesive part 113. At this time, the upper side of the battery cell 15 and the longitudinal beam 11 form an integral whole, and the lower side of the battery cell 15 and the bottom plate 13 of the housing form an integral whole, thereby improving the stability of the battery cell 15 and the structural strength of the battery pack casing. At the same time, the middle side of the battery cell 15 facing the longitudinal beam 11 is buffered by the first buffer part 111, which saves the amount of adhesive used and improves the buffering effect of the battery cell 15. In other words, in this way, the battery cell 15 and the battery pack casing form an integral structure.

[0046] The enhanced stability of Cell 15 ensures that the battery maintains efficient energy conversion and storage under various usage scenarios, reducing energy loss and thus improving the overall efficiency of the battery. The stable Cell 15 can reduce the aging rate of the battery and extend its service life. By reducing fluctuations in the internal chemical reaction of the battery, it can slow down the decay of battery capacity, allowing the battery to maintain high performance for a longer period of time.

[0047] Furthermore, the first colloid portion 112 and the first buffer portion 111 are basically flush with the side of the battery cell 15, or the first buffer portion 111 is slightly closer to the battery cell 15. Since the first buffer portion 111 can be squeezed and buffered, the battery cell 15 can be bonded to the first colloid portion 112 when the battery cell 15 is squeezed between the first buffer portion 111 and the first buffer portion 111. The second colloid portion 113 is also squeezed into the reserved space 114 below the first buffer portion 111. The second colloid portion 113 is bonded to the bottom of the first buffer portion 111 and to the longitudinal beam 11, which improves the integrity and reliability of the connection between the battery cell 15 and the longitudinal beam 11.

[0048] In some embodiments, the vertical extension height of the first colloidal portion 112 along the longitudinal beam 11 is greater than the vertical extension height of the second colloidal portion 113 along the longitudinal beam 11.

[0049] In practice, the second adhesive portion 113 is applied to the bottom plate 13 of the housing. Since the adhesive area on the bottom plate 13 is relatively large, the thickness of the adhesive applied to the bottom plate 13 can be appropriately reduced to save adhesive usage. When multiple battery cells 15 are laid and bonded to the bottom plate 13, the adhesive is squeezed into the pre-reserved space 114 below the first buffer portion 111, so that the adhesive comes into contact with the longitudinal beam 11. That is, the bottom of the battery cell 15 is bonded to the bottom plate 13 of the housing. The battery cell 15 squeezes the second adhesive portion 113 to the longitudinal beam 11, so that the lower side of the battery cell 15 is also bonded to the second adhesive portion 113, and the upper side of the battery cell 15 is bonded to the first adhesive portion 112. Thus, the stability of the upper, lower and bottom parts of the battery cell 15 is enhanced, thereby improving the overall stability of the battery cell 15, increasing the structural strength, and saving adhesive usage.

[0050] In some embodiments, the extension length of the first colloidal portion 112 along the length direction of the longitudinal beam 11 is less than the extension length of the longitudinal beam 11.

[0051] In practice, such as Figure 1 As shown, the battery pack housing also includes crossbeams 16, such as three crossbeams 16, which are two end crossbeams 16 and a middle crossbeam 16. The longitudinal beam 11 connects one end crossbeam 16 and the middle crossbeam 16. The space enclosed between the other end crossbeam 16 and the middle crossbeam 16 is the electronic control installation space 20. The electronic control installation space 20 is used to install components such as the battery management system (BMS) of the battery.

[0052] In other words, by distributing the cell mounting space 12 and the electronic control mounting space 20 along the first direction, the cell mounting space 12 and the electronic control mounting space 20 can be separated, thereby separating the battery module and electrical components to avoid interference between them. This improves the reliability of the battery module and electrical components and allows the battery module and electrical components to be arranged as a whole inside the battery pack housing, reducing the space occupied by the battery module and electrical components, improving space utilization, and thus reducing the volume and weight of the battery pack housing and lowering the installation cost of the battery pack housing.

[0053] Furthermore, when multiple battery cells 15 are disposed within the space enclosed by a crossbeam 16 at one end and a crossbeam 16 in the middle, the multiple battery cells 15 are distributed along the length direction, which is... Figure 1 In the left-right direction, multiple battery cells 15 are placed in the battery cell installation space 12. After installation, a gap needs to be left between them and the crossbeam 16. For example, gaps are left between the two ends of the multiple battery cells 15 and the crossbeam 16 at one end and the middle of the crossbeam 16. Specifically, the battery cells 15 expand during charging and contract during discharging. This repeated expansion and contraction will put pressure on the battery cells 15. If there is not enough gap, this pressure may damage the battery cells 15 or the battery pack structure. In other words, the gap between the crossbeam 16 and the battery cells 15 can provide sufficient space for the thermal expansion and contraction of the battery cells 15 during use. Therefore, leaving gaps can help dissipate heat and avoid safety problems caused by local overheating.

[0054] When there is a gap between the battery cell 15 and the crossbeam 16, the extension length of the first adhesive portion 112 connecting the battery cell 15 to the longitudinal beam 11 is less than the extension length of the longitudinal beam 11. This allows for saving the amount of the first adhesive portion 112 while maintaining the gap between the battery cell 15 and the crossbeam 16, thus enabling the battery cell 15 to be bonded to the longitudinal beam 11.

[0055] In some embodiments, the battery pack housing further includes an end beam 14, which is parallel to the longitudinal beam 11, and a second buffer portion 141 is provided on the side of the end beam 14 facing the longitudinal beam 11. The vertical extension height of the second buffer portion 141 along the end beam 14 is greater than the vertical extension height of the first buffer portion 111 along the longitudinal beam 11.

[0056] Reference Figure 4As shown, the end beam 14 is parallel to the longitudinal beam 11 and serves as the outer structure of the battery pack housing. Some of the multiple cell mounting spaces 12 contain cell 15, while others do not. The end beam 14 has a second buffer 141 on the side facing the cell mounting space 12. The second buffer 141 can be made of foam, and the foam is placed between the end beam 14 and the cell 15 to improve the impact resistance of the end beam 14 when it is subjected to a collision.

[0057] In addition, the height of the second buffer part 141 extending vertically along the end beam 14 is set to be greater than the height of the first buffer part 111 extending along the longitudinal beam 11. That is, the height of the second buffer part 141 can be set to be the same as that of the end beam 14. When the battery cell 15 contacts the longitudinal beam 11, the second buffer part 141 can buffer the entire side of the battery cell 15, thereby improving the side impact resistance of the battery cell 15.

[0058] In some embodiments, the height of the battery cell 15 is higher than the height of the longitudinal beam 11. In practice, the height of the battery cell 15 in the vertical direction is higher than the height of the longitudinal beam 11. After the battery cell 15 is placed in the battery cell installation space 12, the top of the battery cell 15 is higher than the top of the longitudinal beam 11, thereby achieving the effect of reducing the weight of the battery pack casing, saving materials, and enabling the installation of multiple battery cells 15.

[0059] It should also be noted that the upper part of the multiple battery cells 15 within each battery cell installation space 12 is covered by a cover plate 17, that is, as shown in the figure. Figure 5 As shown, Figure 5 One of the battery cell installation spaces 12 has a cover plate 17 on its top. The cover plates 17 are not shown on the top of the other battery cell installation spaces 12, but they are actually designed with cover plates 17. The cover plates 17 can protect multiple battery cells 15 and protect the battery cells 15 from the influence of the external environment.

[0060] In addition, a flexible circuit board 18 and supporting cotton 19 are provided between the cover plate 17 and the battery cell 15. The flexible circuit board 18 is located on top of the battery cell 15 and near the longitudinal beam 11. The flexible circuit board 18 (FPC) is mainly used to electrically connect the battery cell 15 to the battery management system (BMS) for transmitting data and signals between the battery cell 15 and the BMS. The BMS is responsible for monitoring and managing the battery status, including parameters such as voltage, temperature, and current. As a medium for signal transmission, the flexible circuit board 18 enables data acquisition and transmission between the battery cell 15 and the BMS, and also has overcurrent protection. By using the flexible circuit board 18, the use of traditional wiring harnesses can be reduced, improving the flexibility and reliability of the system.

[0061] Furthermore, the support cotton 19 is located above the flexible circuit board 18. The support cotton 19 is mainly used for heat insulation and cushioning on the battery cell 15. It can enhance the rapid heat dissipation capability of the battery cell 15, reduce heat transfer, and protect the battery cell 15 from damage when it is impacted. The flexible circuit board 18 is located close to the positive and negative terminals of the battery cell 15, meaning that the heat at the location of the flexible circuit board 18 is higher than that at other locations. The support cotton 19 is made of foam material, which can dissipate heat well. Located above the flexible circuit board 18, it can better dissipate heat for both the flexible circuit board 18 and the battery cell 15. In addition, foam material usually has good elasticity and cushioning performance, which can play a buffering role when the battery cell 15 is impacted by external force, protecting the battery cell 15 from damage.

[0062] Furthermore, by making the thickness of the support cotton 19 greater than the thickness of the flexible circuit board 18, the buffering effect on the battery cell 15 can be improved. Multiple support cotton 19s are provided and distributed at intervals along the arrangement direction of multiple battery cells 15. At the same time, the support cotton 19s are set at both ends of the top of the battery cell 15. In this way, the cover plate 17 and the battery cell 15 can be effectively supported and buffered by the support cotton 19s. At the same time, the material of the support cotton 19s can also be saved.

[0063] The present invention also proposes a battery pack, including the battery pack shell described above. The longitudinal beam 11 inside the battery pack shell is provided with a first buffer part 111 to buffer the battery cell 15. The first gel part 112 bonds the longitudinal beam 11 and the battery cell 15 together, which improves the integrity between the longitudinal beam 11 and the battery cell 15, and also improves the strength of the battery pack shell, and also has a certain buffering effect.

[0064] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0065] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack housing, characterized in that, include: shell; At least one longitudinal beam is installed inside the housing and is used to divide the space inside the housing into at least two cell mounting spaces for installing cells. The longitudinal beam has a first buffer portion and a first adhesive portion on its side facing the battery cell mounting space. The first buffer portion elastically presses against the longitudinal beam and the battery cell, and the first adhesive portion bonds the longitudinal beam and the battery cell together.

2. The battery pack housing according to claim 1, characterized in that, The first colloidal portion and the first buffer portion are distributed along the vertical direction of the longitudinal beam.

3. The battery pack housing according to claim 1, characterized in that, The vertical extension height of the first buffer portion along the longitudinal beam is greater than the vertical extension height of the first colloidal portion along the longitudinal beam.

4. The battery pack housing according to claim 1, characterized in that, The vertical extension height of the first colloidal portion along the longitudinal beam is less than 1 / 2 of the height of the longitudinal beam.

5. The battery pack housing according to claim 1, characterized in that, It also includes a bottom plate of the housing, the bottom plate of the housing is provided with a second adhesive part, one side of the longitudinal beam and a reserved space is left at the bottom of the first buffer part, the battery cell is bonded to the bottom plate of the housing through the second adhesive part and a part of the second adhesive part is squeezed into the reserved space.

6. The battery pack housing according to claim 5, characterized in that, The vertical extension height of the first colloidal portion along the longitudinal beam is greater than the vertical extension height of the second colloidal portion along the longitudinal beam.

7. The battery pack housing according to claim 1, characterized in that, The first colloidal portion extends less than the longitudinal beam in length.

8. The battery pack housing according to claim 1, characterized in that, It also includes an end beam, which is parallel to the longitudinal beam, and the end beam has a second buffer section on the side facing the longitudinal beam. The vertical extension height of the second buffer section along the end beam is greater than the vertical extension height of the first buffer section along the longitudinal beam.

9. The battery pack housing according to claim 1, characterized in that, The height of the battery cell is higher than the height of the longitudinal beam.

10. A battery pack, characterized in that, Includes the battery pack housing as described in any one of claims 1-9.

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