A battery pack and a vehicle

Abstract

The application provides a battery pack and a vehicle, which are beneficial to integrated design of the battery pack. The battery pack provided by the application comprises a cooling assembly and a cell assembly, the cell assembly comprises a plurality of cell rows, the cooling assembly comprises a cooling plate, at least one side of at least one cell row is provided with the cooling plate; the cooling assembly further comprises a cooling pipeline, the cooling plate is communicated with the cooling pipeline; the battery pack comprises an expansion beam, at least part of the cooling pipeline is located in the expansion beam.

Description

Technical Field

[0001] This application relates to the field of vehicle technology, specifically to a battery pack and a vehicle. Background Technology

[0002] A battery pack consists of a housing and multiple rows of battery cells located inside the housing. During operation, these cells generate heat, and battery packs typically include cooling plates to cool them. In related technical solutions, the cooling plate is positioned at the bottom of the multiple rows of cells, meaning the cells are supported by the cooling plate. However, the cooling plate occupies space along the height of the battery pack. If the cooling plate is placed on the side of the battery pack, the connecting pipes will also occupy space, both of which are detrimental to the integrated and optimized design of the battery pack. Utility Model Content

[0003] The purpose of this application is to provide a battery pack and a vehicle that facilitates the integrated and optimized design of the battery pack.

[0004] To solve the above-mentioned technical problems, this application provides a battery pack, including a cooling assembly and a cell assembly. The cell assembly includes a plurality of cell rows, and the cooling assembly includes a cooling plate, wherein the cooling plate is arranged on at least one side of at least one of the cell rows.

[0005] The cooling assembly further includes cooling pipes, and the cooling plate is connected to the cooling pipes; the battery pack includes an expansion beam, and at least a portion of the cooling pipes is located on the expansion beam.

[0006] Optionally, the cell array includes a plurality of cells arranged along a first direction, and the expansion beams are arranged on both sides of the cell assembly along the first direction;

[0007] The cooling pipeline includes an inlet pipeline and an outlet pipeline, with at least a portion of the outlet pipeline and at least a portion of the inlet pipeline located in the same expansion beam; or at least a portion of the outlet pipeline located in one expansion beam and at least a portion of the inlet pipeline located in another expansion beam.

[0008] Optionally, the inlet pipeline includes an inlet pipe section, and the outlet pipeline includes an outlet pipe section;

[0009] The expansion beam has a groove to accommodate both the inlet pipe section and the outlet pipe section, or one of the inlet pipe section and the outlet pipe section.

[0010] Optionally, the inlet pipe section and the outlet pipe section are both located within the groove of the same expansion beam and are distributed along the height direction of the battery pack.

[0011] Optionally, the expansion beam with the groove is further provided with at least one reinforcing plate, which covers at least a portion of the opening of the groove.

[0012] Optionally, the battery pack further includes a pull strip;

[0013] One of the expansion beams is equipped with the reinforcing plate, and one end of the tie rod is connected to the reinforcing plate, while the other end is connected to another expansion beam; or, both expansion beams are equipped with the reinforcing plate, and one end of the tie rod is connected to the reinforcing plate of one expansion beam, while the other end is connected to the reinforcing plate of the other expansion beam.

[0014] Optionally, the battery includes a plurality of the pull strips, which are distributed along the second direction;

[0015] Each of the pull bars is supported on one side of one of the cell stacks along the second direction and on the other side of an adjacent cell stack.

[0016] Optionally, the cooling plate and the battery cell are bonded and fixed together.

[0017] Optionally, the cooling plate is disposed between two adjacent battery cell rows, and / or the cooling plate is disposed on the outer side of the two outermost battery cell rows.

[0018] In this application's technical solution, at least one row of battery cells has a cooling plate on one side. This allows the cooling plate to be positioned using the gap between adjacent rows of cells or the gap between the outermost row of cells and the casing. When coolant is introduced into the cooling plate, the coolant flows within it, carrying away heat from adjacent cells and facilitating cooling. This arrangement makes full use of space, resulting in a more compact battery pack structure. A cooling plate is no longer needed at the bottom of the battery pack, reducing its height. Furthermore, multiple cooling plates and cell assemblies can be assembled into a single structure, increasing rigidity and better protecting the cell assemblies. Simultaneously, by arranging the cooling pipes within the expansion beams of the battery pack, the space within the expansion beams is fully utilized. This ensures that the cooling pipes do not occupy excessive space in the battery pack after the cooling plates are positioned on the sides of the cell rows, thus facilitating integrated and optimized battery pack design.

[0019] This application also provides a vehicle that includes the battery pack described in any of the above claims and has the same technical effects as the battery pack described above. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the battery pack structure in one embodiment of this application;

[0021] Figure 2 for Figure 1 Top view of the battery pack;

[0022] Figure 3 for Figure 1 A schematic diagram of the overall structure of the intermediate cooling component and the battery cell assembly;

[0023] Figure 4 for Figure 3 Schematic diagram of the intermediate cooling assembly;

[0024] Figure 5 for Figure 1 A schematic diagram of the battery pack's casing;

[0025] Figure 6 for Figure 1 A partially enlarged schematic diagram of the battery pack at the location of the first expansion beam;

[0026] Figure 7 for Figure 6 Top view of the first expansion beam in the middle;

[0027] Figure 8 for Figure 6 A cross-sectional view of the location of the first expansion beam along the first direction;

[0028] Figure 9 for Figure 6 A cross-sectional view of the first expansion beam along the first direction at the location of the reinforcing plate.

[0029] The annotations in the attached figures are explained as follows:

[0030] 10-Box;

[0031] 20-First expansion beam; 201-First beam sidewall; 202-Beam bottom wall; 203-Second beam sidewall; 204-Reinforcing plate;

[0032] 30-cell;

[0033] 40 - Cooling assembly; 401 - Inlet pipe; 4011 - Inlet pipe section; 4012 - Inlet connector pipe section; 402 - Outlet pipe; 4021 - Outlet pipe section; 4022 - Outlet connector pipe section; 403 - Cooling plate;

[0034] 50-stretch noodles;

[0035] 60 - Second expansion beam;

[0036] 70-Insulation pad. Detailed Implementation

[0037] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. In the embodiments of this application, the terms "first," "second," etc., are used only to describe the same or similar features, and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features.

[0038] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the battery pack structure in one embodiment of this application; Figure 2 for Figure 1 Top view of the battery pack. Figure 2 Only one battery cell 30 is shown to facilitate observation of the heat insulation pad and cooling plate 403.

[0039] The battery pack in this embodiment includes a housing 10. Figure 2 The cover of the housing 10 is shown to illustrate the internal structure of the battery pack. The battery pack also includes cell assemblies located within the housing 10. Each cell assembly includes multiple cell rows, and each cell row includes multiple cells 30 distributed along a first direction, i.e., the first direction is... Figure 1 The X-direction shown can also refer to the vehicle's X-direction, i.e., the width direction of the vehicle. However, depending on the battery pack's installation orientation, the X-direction and the vehicle's width direction can differ. The number of cells in each cell array can be, for example, greater than or equal to 10. The cell 30 can be a cuboid structure. When multiple cells 30 in each cell array are arranged, they can be arranged with their largest faces facing each other. The largest face is the side with the largest area of ​​the cuboid structure, such as... Figure 1 As shown. To reduce the impact of thermal runaway of cell 30 on adjacent cells 30, a heat insulation pad 70 can be placed between two adjacent cells 30 in each cell row. The heat insulation pad 70 can be, for example, adhered to the large surface of cell 30. Furthermore, the battery pack includes multiple cell rows arranged along a second direction, i.e. Figure 1 The diagram illustrates the Y-axis, with the first and second directions perpendicular. The number of rows of battery cells is, for example, greater than or equal to 3. It can be seen that the battery cell assembly is a structure formed by the array distribution of multiple battery cells (30 cells per row).

[0040] It is worth noting that the battery pack also includes a cooling component 40, such as Figure 3 and Figure 4 As shown, Figure 3 for Figure 1 A schematic diagram of the overall structure of the intermediate cooling component 40 and the battery cell assembly; Figure 4 for Figure 3 The schematic diagram of the intermediate cooling component 40 shows the flow direction of the coolant, with solid arrows indicating the direction of coolant inflow and dashed arrows indicating the direction of coolant outflow.

[0041] The cooling assembly 40 includes a cooling plate 403 and cooling pipes communicating with the cooling plate 403. The cooling pipes include an inlet pipe 401 and an outlet pipe 402. At least a portion of the cooling assembly 40 is located within the housing 10. Specifically, the main structure of the cooling assembly 40 is located within the housing 10, while parts such as joints of the cooling pipes may extend outside the housing 10. The cooling assembly 40 includes a plurality of cooling plates 403, each having cooling channels (not shown) for flowing coolant. Furthermore, at least one side of at least one cell array is provided with a cooling plate 403 along a second direction.

[0042] like Figure 4 As shown, the multiple cooling plates 403 of the cooling assembly are also distributed along the second direction (Y direction). Specifically, after assembly with the battery cell assembly, at least one cooling plate 403 is located between two adjacent battery cell rows. In this embodiment, a cooling plate 403 is provided between every two battery cell rows. In addition, in this embodiment, besides the cooling plates 403 between two adjacent battery cell rows, cooling plates 403 are also provided on the outer sides of the two outermost battery cell rows distributed along the second direction. The outermost cooling plates 403 are located between the outermost battery cell row and the side wall of the housing 10, that is, cooling plates 403 are provided on both sides of the two outermost battery cell rows along the second direction. The two outermost battery cell rows mentioned here refer to the two outermost battery cell rows at the very edge of the multiple battery cell rows. Figure 3 The first cell bar 30A and the second cell bar 30B are in the middle; the outermost cell bar (either the first cell bar 30A or the second cell bar 30B) is the side of the cell bar that is close to the side wall of the housing 10, and the inner side is the side facing the adjacent cell bar.

[0043] When coolant is introduced into the cooling plate 403, the coolant flows within it, carrying away heat from the adjacent battery cells 30 and facilitating cooling and heat dissipation. This arrangement fully utilizes the space between adjacent cell rows, resulting in a more compact battery pack structure. The bottom of the battery pack no longer requires a cooling plate, reducing its height, which is perpendicular to the first and second directions mentioned above. Furthermore, assembling multiple cooling plates 403 and the battery cell assembly into a single structure increases rigidity and better protects the battery cell assembly. When cooling plates 403 are also installed on the outer sides of the two outermost cell rows, the outermost cooling plates 403 effectively form the outer frame structure of the battery cell assembly, further ensuring the rigidity of the overall structure composed of the battery cell assembly and the cooling plates 403.

[0044] In addition, when the cooling plate 403 is disposed between adjacent cell rows and on the outside of the outermost cell row, the contact area with the cell 30 is larger, which is beneficial to improving cooling efficiency compared to the scheme mentioned in the background art of disposing of a cooling plate only at the bottom of the battery pack.

[0045] For example, the cooling plate 403 and the battery cell 30 can be bonded together to improve the reliability of the overall structure consisting of the battery cell assembly and the cooling plate 403. The adhesive, for example, is a thermally conductive structural adhesive, which not only ensures reliable connection but also conducts heat to improve cooling efficiency.

[0046] It is understandable that, to better ensure the effectiveness of cooling, the length of the cooling plate 403 extending along the first direction can be approximately equal to the length of a row of battery cells along the first direction, and the height of the cooling plate 403 can also be approximately equal to the height of the battery cell 30. The cooling plate 403 can be attached to the small facet along the length direction of each battery cell 30 in a row.

[0047] Combined Figure 4 In this embodiment, the cooling assembly 40 includes an outlet pipe 402 and an inlet pipe 401. The cooling channels of the cooling plates 403 have inlets and outlets. The inlet of each cooling plate 403 is connected to the inlet pipe 401, and the outlet of each cooling plate 403 is connected to the outlet pipe 402. This allows for simultaneous supply of coolant to multiple cooling plates 403 through one inlet pipe 401, and the coolant from multiple cooling plates 403 can simultaneously flow to the outlet pipe 402, converge, and then flow out. This simplifies the arrangement of the coolant piping. Of course, it is also possible to provide separate inlet and outlet pipes for each cooling plate 403.

[0048] Furthermore, the inlet pipe 401 and the outlet pipe 402 can be located on the same side of the cell assembly along the first direction. In this case, the inlet and outlet of the cooling channel of each cooling plate 403 are also located at the same end of the cooling plate 403 along the first direction. The cooling channel is, for example, a bent channel, specifically a U-shaped channel, so that the inlet and outlet can be located at the same end. This makes the arrangement of the coolant piping more convenient.

[0049] Please continue to combine Figure 5 understand, Figure 5 for Figure 1 The structural diagram of the battery pack housing 10 does not clearly show the housing cover of housing 10. Housing 10 may be a split structure, including a housing shell and a housing cover. Figure 5 Only the outer shell of box 10 is shown.

[0050] In this embodiment, the battery pack housing 10 is provided with expansion beams, and expansion beams are arranged on both sides of the battery cell assembly along the first direction, namely a first expansion beam 20 and a second expansion beam 60. It should be understood that the battery cell assembly will undergo some expansion deformation during use. In this embodiment, the battery cell 30 has a cuboid structure, which is prone to expansion deformation at its large surface area. Specifically, the expansion beams are arranged on both sides of the battery cell assembly along the first direction to resist and absorb this expansion deformation, thereby ensuring the normal use of the battery cell assembly. In this embodiment, at least a portion of the cooling pipes can be arranged within the expansion beams.

[0051] like Figure 4 As shown, the inlet pipe 401 includes an inlet pipe section 4011, and the outlet pipe 402 includes an outlet pipe section 4011. At this time, the first expansion beam 20 has a groove 20a, and both the inlet pipe section 4011 and the outlet pipe section 4011 are located within the groove 20a of the first expansion beam 20.

[0052] Can be combined Figure 6 and Figure 7 understand, Figure 6 for Figure 1 A partially enlarged schematic diagram of the battery pack at the location of the first expansion beam 20; Figure 7 for Figure 6 Top view of the first expansion beam 20.

[0053] A groove 20a is provided on the first expansion beam 20, extending along the second direction with the first expansion beam 20. This allows for full utilization of the space within the first expansion beam 20 as space for the arrangement of the inlet pipe section 4011 and the outlet pipe section 4011, thereby making the entire battery pack structure more compact. (See below...) Figure 4 The inlet pipe section 4011 and outlet pipe section 4011 of the cooling assembly 40 are straight pipe sections arranged inside the first expansion beam 20. The inlet pipe 401 also includes an inlet connector pipe section 4022, and the outlet pipe 402 includes an outlet connector pipe section 4012. The inlet connector pipe section 4022 and the outlet connector pipe section 4012 extend out of the first expansion beam 20 to facilitate connection with the external coolant pipeline. The main parts of the inlet pipe 401 and the outlet pipe 402 are the inlet pipe section 4011 and the outlet pipe section 4011, respectively, both of which are housed within the first expansion beam 20.

[0054] Please look again. Figure 8 , Figure 8 for Figure 6 A cross-sectional view of the first expansion beam 20 along the first direction.

[0055] As can be seen, in this embodiment, the inlet pipe section 4011 and the outlet pipe section 4011 are distributed along the height direction of the battery pack, that is... Figure 8The diagram illustrates the Z-direction. The height dimension of the first expansion beam 20 is larger than its width dimension in the first direction. This allows for more efficient use of the internal space of the first expansion beam 20, eliminating the need for an increased width dimension in the first direction. Furthermore, the inlet pipe section 4011 and outlet pipe section 4011, distributed vertically along the height direction, are less prone to interference. (See diagram for reference.) Figure 7 As shown, the width of the groove 20a is w. After the inlet pipe section 4011 and the outlet pipe section 4011 are installed, the ability of the first expansion beam 20 to absorb expansion should not be affected. Therefore, the radial dimension D of the inlet pipe section 4011 and the outlet pipe section 4011 should be smaller than the width w. It can be set to w greater than or equal to D+0.6mm.

[0056] Of course, the first expansion beam 20 can also be designed without increasing its width in the first direction, and the inlet pipe section 4011 and the outlet pipe section 4011 can be arranged side by side along the first direction, but the cross-sectional dimensions will need to be relatively smaller. In contrast, distributing the inlet pipe section 4011 and the outlet pipe section 4011 along the height direction allows for larger cross-sectional dimensions, which is beneficial for meeting the requirements of simultaneously supplying liquid to multiple cooling plates 403 or collecting the return liquid from multiple cooling plates 403.

[0057] It is understandable that the inlet pipe 401 is located on one side of the cell assembly along the first direction, and the outlet pipe 402 is located on the other side of the cell assembly along the second direction. In this case, the inlet and outlet of the cooling channel of each cooling plate 403 are located at different ends of the cooling plate 403 along the first direction. The cooling channel is, for example, a straight channel extending along the first direction, which is more convenient to process.

[0058] At this time, both the first expansion beam 20 and the second expansion beam 60 may have a groove 20a. One of the inlet pipe section 4011 and the outlet pipe section 4011 is disposed in the groove 20a of the first expansion beam 20, and the other is disposed in the groove of the second expansion beam 60. Similarly, the space of the expansion beam is fully utilized to accommodate the piping of the cooling assembly 40.

[0059] Can watch again Figure 9 understand, Figure 9 for Figure 6 A cross-sectional view of the first expansion beam 20 along the first direction at the position of the reinforcing plate 204. Figure 8 The section view is taken along the first direction at a location other than the reinforcing plate 204.

[0060] In this embodiment, the expansion beam with the groove 20a is also equipped with at least one reinforcing plate 204, which covers at least a portion of the opening of the groove 20a. Figure 6In the first expansion beam 20, a groove 20a is provided to accommodate the inlet pipe section 4011 and the outlet pipe section 4011 simultaneously. The first expansion beam 20 specifically includes a plurality of reinforcing plates 204 distributed in the second direction.

[0061] Specifically, the main structure of the first expansion beam 20 is U-shaped, and the inner cavity of the main structure is the groove 20a. The main structure includes a first beam side wall portion 201, a beam bottom wall portion 202, and a second beam side wall portion 203 that are connected in sequence. Among them, the first beam side wall portion 201 and the second beam side wall portion 203 both extend in the second direction and are oppositely arranged in the first direction. The beam bottom wall portion 202 connects the first beam side wall portion 201 and the second beam side wall portion 203. It can be seen that in order to ensure the absorption capacity of the first expansion beam 20 for the deformation of the battery cell 30, the first beam side wall portion 201 and the second beam side wall portion 203 are not limited to being a single flat plate structure, and can be like Figure 6 、 9 As shown, some plate-shaped or columnar connecting ribs are provided on both the first beam side wall portion 201 and the second beam side wall portion 203. At this time, the provided reinforcing plate 204 can be located at the position of the notch and is oppositely arranged in the height direction with the beam bottom wall portion 202. That is, the reinforcing plate 204 serves as the top of the first expansion beam 20, and the reinforcing plate 204 connects the first beam side wall portion 201 and the second beam side wall portion 203, and can be specifically connected by fasteners, such as fastening screws, etc.

[0062] That is, since the first expansion beam 20 is a grooved structure with a groove 20a provided to accommodate the inlet pipe section 4011 and / or the outlet pipe section 4011, the top of the first expansion beam 20 is open. Adding a reinforcing plate 204 at the opening position can ensure the strength of the first expansion beam 20 after grooving. Figure 5 The second expansion beam 60 in [[ ]] can be not grooved, for example, it is a profile structure with a cross-section in the shape of a Chinese character 'ri', etc.

[0063] Of course, if the inlet pipeline 401 and the outlet pipeline 402 are respectively arranged on the first expansion beam 20 and the second expansion beam 60, the second expansion beam 60 can also be grooved, and like the first expansion beam 20, a reinforcing plate 204 can also be provided to ensure the structural strength after grooving.

[0064] It can be further combined with Figure 6It is understood that the battery pack in this embodiment also includes a pull strip 50, one end of which is connected to the first expansion beam 20 and the other end to the second expansion beam 60. The first expansion beam 20 is equipped with a reinforcing plate 204. One end of the pull strip 50 is connected to the reinforcing plate 204 of the first expansion beam 20, and the other end is connected to the second expansion beam 60. That is, the pull strip 50 can connect the first expansion beam 20 and the second expansion beam 60, thereby improving the expansion resistance of the expansion beam. The pull strip 50 is, for example, made of a composite material of glass fiber and resin, which has good tensile strength. The tensile strength of the pull strip 50 is, for example, set to be greater than or equal to 300 MPa.

[0065] As mentioned above, the slotted first expansion beam 20 is equipped with a reinforcing plate 204. The reinforcing plate 204 serves two purposes: firstly, it strengthens the slotted expansion beam; secondly, it connects the slotted expansion beam to the tie rod 50. The tie rod 50 can be fixed to the reinforcing plate 204 using fasteners such as screws. It is understood that if the second expansion beam 60 is also slotted, it will also be equipped with a reinforcing plate 204. In this case, one end of the tie rod 50 is connected to the reinforcing plate 204 of the first expansion beam 20, and the other end is connected to the reinforcing plate 204 of the second expansion beam 60. If the second expansion beam 60 is a non-slotted structure that does not require the accommodation of the inlet pipe section 4011 or the outlet pipe section 4011, the tie rod 50 can be directly connected to the top of the second expansion beam 60.

[0066] In this embodiment, the battery pack may include multiple pull strips 50, which are distributed along a second direction to further improve the expansion resistance of the first expansion beam 20 and the second expansion beam 60. The first expansion beam 20 or the second expansion beam 60 may be provided with multiple reinforcing plates 204 along the second direction, spaced apart to provide reinforcement and connection for the pull strips 50, reducing material usage and simplifying installation. Of course, the reinforcing plates 204 are not limited to multiple plates; for example, the reinforcing plates 204 may be strip-shaped plates extending along the second direction to cover the entire opening of the groove 20a.

[0067] like Figure 6 As shown, in this embodiment, each pull bar 50 covers the gap between two adjacent cell arrays, that is, it is located above the cooling plate 403, and can also play a certain limiting role for the cooling plate 403. The pull bar 50 and the cooling plate 403 can be in contact or have a gap. At this time, one side of the pull bar 50 along the second direction can be supported on one cell array, and the other side can be supported on another adjacent cell array, that is, the pull bar 50 is supported at the shoulder position of two adjacent cell arrays.

[0068] In addition, this embodiment also provides a vehicle, which includes the battery pack described in any of the above embodiments and has the same technical effects as the above embodiments, and will not be described again.

[0069] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A battery pack, characterized by, The battery pack comprises a cooling assembly (40) and an electric core assembly, the cooling assembly (40) comprises a cooling plate (403), at least one side of at least one electric core row is arranged with the cooling plate (403); The cooling assembly (40) further comprises a cooling pipeline, the cooling plate (403) is communicated with the cooling pipeline; the battery pack comprises an expansion beam, at least part of the cooling pipeline is located in the expansion beam.

2. The battery pack of claim 1, wherein, The electric core row comprises a plurality of electric cores (30) arranged along a first direction, the electric core assembly is arranged with the expansion beam on both sides along the first direction; The cooling pipeline comprises an inlet pipeline (401) and an outlet pipeline (402), at least part of the outlet pipeline (402) and at least part of the inlet pipeline (401) are located in the same expansion beam; or at least part of the outlet pipeline (402) is located in one expansion beam, and at least part of the inlet pipeline (401) is located in another expansion beam.

3. The battery pack of claim 2, wherein, The inlet pipeline (401) comprises an inlet pipe section (4011), and the outlet pipeline (402) comprises an outlet pipe section (4021); The expansion beam is provided with a groove (20a) for simultaneously accommodating the inlet pipe section (4011) and the outlet pipe section (4021) or one of the inlet pipe section (4011) and the outlet pipe section (4021).

4. The battery pack of claim 3, wherein, The inlet pipe section (4011) and the outlet pipe section (4021) are located in the groove (20a) of the same expansion beam and are distributed along the height direction of the battery pack.

5. The battery pack of claim 3 or 4, wherein, The expansion beam provided with the groove (20a) is further provided with at least one reinforcing plate (204), and the reinforcing plate (204) covers at least part of the slot of the groove (20a).

6. The battery pack of claim 5, wherein, The battery pack further comprises a tension strip (50); One of the expansion beams is provided with the reinforcing plate (204), one end of the tension strip (50) is connected to the reinforcing plate (204), and the other end is connected to another expansion beam; or both of the expansion beams are provided with the reinforcing plate (204), one end of the tension strip (50) is connected to the reinforcing plate (204) of one of the expansion beams, and the other end is connected to the reinforcing plate (204) of another expansion beam (60).

7. The battery pack of claim 6, wherein, The battery comprises a plurality of tension strips (50), and the plurality of tension strips (50) are distributed along a second direction; Each of the tension strips (50) is supported on one of the electric core rows on one side along the second direction and is supported on another of the electric core rows adjacent to the one of the electric core rows on the other side.

8. The battery pack of any one of claims 1-4, wherein, The cooling plate (403) and the electric core (30) are adhesively fixed.

9. The battery pack of any one of claims 1-4, wherein, The cooling plate (403) is arranged between two of the electric core rows adjacent to each other, and / or the cooling plate (403) is arranged on the outside of two of the electric core rows located at the outermost sides.

10. A vehicle characterized by comprising: The battery pack comprises the battery pack according to any one of claims 1-9.

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