Battery pack

Abstract

The utility model discloses a battery pack which comprises a shell assembly, a cold plate, a plurality of partition plates and a plurality of battery cells, the cold plate is arranged in the shell assembly, and a cooling channel is arranged in the cold plate; the multiple partition plates are arranged in the shell assembly, located above the cold plate and connected with the cold plate, the multiple partition plates are arranged in the first direction, a containing space is defined between every two adjacent partition plates, flow channels are formed in the partition plates and communicate with the cooling channel, and the first direction is perpendicular to the vertical direction; a plurality of battery cells which are arranged along a first direction are arranged in each accommodating space; according to the battery pack disclosed by the utility model, the partition plates and the cold plates can be used for cooling and radiating the battery cells, so that the battery cells are prevented from being overheated as much as possible, thermal runaway of the battery cells is avoided as much as possible, and the thermal safety of the battery pack is improved.

Description

Technical Field

[0001] The utility model mainly relates to the technical field of power batteries, and in particular to a battery pack. Background Art

[0002] In existing battery packs, when the battery pack is subjected to impact, the battery pack is easily shaken, squeezed and deformed, and the battery is prone to short circuit, leakage or even combustion, and the thermal safety of the battery pack is low. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a battery pack with high thermal safety.

[0004] According to the battery pack of the embodiment of the utility model, it includes a shell assembly, a cold plate, a plurality of partitions and a plurality of battery cells, the cold plate is arranged in the shell assembly, and a cooling channel is arranged in the cold plate; a plurality of the partitions are arranged in the shell assembly, a plurality of the partitions are located above the cold plate and connected to the cold plate, a plurality of the partitions are arranged along a first direction, and a accommodating space is defined between two adjacent partitions, a flow channel is arranged in the partition, and the flow channel is connected to the cooling channel, and the first direction is perpendicular to the up and down direction; a plurality of the battery cells arranged along the first direction are arranged in each of the accommodating spaces.

[0005] According to the battery pack of the embodiment of the utility model, a cold plate and a plurality of partitions are arranged in a shell assembly, and a storage space is defined between two adjacent partitions. A plurality of battery cells arranged along a first direction are arranged in each storage space. The partition can provide support for the plurality of battery cells in the first direction, so that the position of the battery cells in the first direction is more reliable. The shell assembly can protect the battery cells, the plurality of partitions and the cold plate located inside the storage space, avoid damage to the battery cells due to external impact, and avoid spontaneous combustion of the battery cells. The coolant in the cooling channel in the cold plate can enter the flow channel in the partition, so that the partition and the cold plate both have the effect of cooling and heat insulation. The partition and the cold plate can both cool and dissipate heat for the battery cells, avoid overheating of the battery cells as much as possible, avoid thermal runaway of the battery cells as much as possible, and increase the thermal safety of the battery pack.

[0006] In some embodiments of the present invention, the battery pack includes a heat preservation plate, which is disposed in a shell assembly, and the heat preservation plate is located below the cold plate and is welded to the cold plate.

[0007] In some embodiments of the utility model, the battery cell is provided with two pole ears, and the two pole ears are respectively arranged on both sides of the battery cell along the second direction, and the second direction, the first direction and the up-down direction are perpendicular to each other.

[0008] In some embodiments of the present invention, the shell assembly includes an upper shell, a bottom plate and a frame, the upper shell and the bottom plate jointly define an installation space, the cold plate, the partition and the battery cell are arranged in the installation space, the cold plate is arranged above the bottom plate, and the cold plate is welded to the bottom plate; the frame is arranged in the installation space, the frame is arranged above the cold plate, the frame is welded to the cold plate, the frame is a square hollow frame, and the frame surrounds the battery cell and the partition.

[0009] In some embodiments of the utility model, the battery pack also includes two first pressure strips, which are respectively arranged at the upper parts of the two ends of the multiple battery cells along the second direction, the first pressure strips are fastened to the partition, the surface of the first pressure strip close to the battery cell is an insulating surface, and the first pressure strip is also provided with a flange, which is in contact with the two side surfaces of the battery cell along the second direction, and the second direction, the first direction and the up and down directions are perpendicular to each other.

[0010] In some embodiments of the present invention, the battery pack further includes two side plates, which are respectively arranged at both ends of the battery cell along the second direction, the flange and the side plates are stacked and connected, and the side plates are located outside the flange.

[0011] In some embodiments of the utility model, the battery pack also includes a second pressure strip, which is arranged on the upper part of the battery cell, and the second pressure strip is arranged between two of the first pressure strips. The surface of the second pressure strip close to the battery cell is an insulating surface, the second pressure strip is in contact with the upper surfaces of the plurality of battery cells, and the second pressure strip is fastened to the partition.

[0012] In some embodiments of the present invention, the battery pack further includes an inlet pipe and an outlet pipe, the cooling channel includes a cooling inlet and a cooling outlet, the cooling inlet is connected to the inlet pipe, the cooling outlet is connected to the outlet pipe, and the inlet pipe and the outlet pipe are arranged on the cold plate.

[0013] In some embodiments of the present invention, two adjacent battery cells are connected by adhesive bonding, and the battery cell adjacent to the separator is connected by adhesive bonding.

[0014] In some embodiments of the present invention, the length of the battery cell is 530-750 mm; and / or, the width of the battery cell is 120-200 mm; and / or, the aspect ratio of the battery cell is 1-6.5.

[0015] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0017] Figure 1 is an exploded view of a battery pack according to an embodiment of the utility model;

[0018] Figure 2 yes Figure 1 The enlarged view of point A in the middle;

[0019] Figure 3 is a three-dimensional diagram of a partition and a frame of a battery pack according to an embodiment of the utility model;

[0020] Figure 4 is a top view of a battery pack according to an embodiment of the utility model with the upper shell removed;

[0021] Figure 5 is a three-dimensional diagram of a battery pack according to an embodiment of the utility model with the upper shell removed;

[0022] Figure 6 yes Figure 5 The enlarged view of point B in the middle;

[0023] Figure 7 is a cross-sectional view of a battery pack according to an embodiment of the utility model;

[0024] Figure 8 yes Figure 7 Enlarged view of point C in the middle;

[0025] Fig. 9 It is a front view of a battery cell of a battery pack according to an embodiment of the utility model.

[0026] Reference numerals:

[0027] 100. Battery pack;

[0028] 1. Shell assembly; 11. Upper shell; 12. Bottom plate; 13. Frame;

[0029] 2. Cold plate; 21. Cooling channel;

[0030] 3. Partition; 31. Flow channel; 32. Accommodation space;

[0031] 4. Battery cell; 41. Tab; 42. Connecting piece;

[0032] 5. Insulation board;

[0033] 6. First layering strip; 61. Flanging;

[0034] 7. Side panel; 8. Second pressure strip; 9. Inlet pipe; 10. Outlet pipe. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0036] In the description of the present utility model, it is necessary to understand that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] Reference below Figure 1-Figure 9 A battery pack 100 according to an embodiment of the present invention is described.

[0039] like Figure 1 As shown, a battery pack 100 according to an embodiment of the present invention includes a housing assembly 1 , a cold plate 2 , a plurality of partitions 3 and a plurality of battery cells 4 .

[0040] Specifically, Figure 7 and Figure 8 As shown, a cooling channel 21 is provided in the cold plate 2 , and a coolant can flow in the cooling channel 21 .

[0041] The battery pack 100 can be applied to a vehicle. When the vehicle encounters a side collision, the battery pack 100 is easily shaken, squeezed and deformed. The battery pack 100 is prone to short circuit, leakage or even combustion, posing a threat to the passengers in the vehicle.

[0042] In the present utility model, if Figure 1 As shown, the cold plate 2 is arranged in the shell assembly 1, and multiple partitions 3 are arranged in the shell assembly 1. The shell assembly 1 can protect the cold plate 2 and the multiple partitions 3, and try to prevent the cold plate 2 and the multiple partitions 3 from being impacted by external forces, and try to prevent the cold plate 2 and the multiple partitions 3 from being damaged.

[0043] like Figure 1 , Figure 3 and Figure 4 As shown, a plurality of partitions 3 are located above the cold plate 2 and connected to the cold plate 2. The plurality of partitions 3 are arranged along a first direction (eg Figure 1 A storage space 32 is defined between two adjacent partitions 3, and each storage space 32 is provided with a plurality of battery cells 4 arranged along the first direction. The partition 3 can provide support for the plurality of battery cells 4 in the first direction, so that the position of the battery cells 4 in the first direction is more reliable, and the shell assembly 1 can protect the battery cells 4 located inside the storage space 32, avoid damage to the battery cells 4 caused by external impact, and avoid spontaneous combustion of the battery cells 4.

[0044] At this time, the cold plate 2 is arranged at the bottom of the battery cell 4 , and the cold plate 2 can also be arranged at the top or side of the battery cell 4 , etc., and can be arranged according to actual conditions to meet different usage requirements.

[0045] like Figure 1 and Figure 2 As shown, a flow channel 31 is provided in the partition 3, and the flow channel 31 is connected to the cooling channel 21. The first direction and the up-down direction (such as Figure 1 The cooling liquid in the cooling channel 21 can enter the flow channel 31. For example, when the cooling liquid enters the cooling channel 21, the water pressure in the cooling channel 21 is relatively high, a plurality of flow channels 31 are provided in the partition 3, a liquid inlet hole is provided on the partition 3, a liquid outlet hole corresponding to the position of the liquid inlet hole is provided on the cooling channel 21, and the liquid inlet hole runs through the plurality of flow channels 31. The cooling liquid in the cooling channel 21 can flow to the liquid inlet hole on the partition 3 through the liquid outlet hole, and enter the plurality of flow channels 31 in the partition 3 through the liquid inlet hole; when the cooling liquid flows out of the cooling channel 21, the water pressure in the cooling channel 21 decreases, and the cooling liquid in the partition 3 falls back into the cooling channel 21 under the action of gravity, and the cooling liquid in both the partition 3 and the cold plate 2 flows out.

[0046] Of course, the present invention is not limited to this. When the working environment of the battery pack 100 is relatively cold, the liquid with a higher temperature may flow into the cooling channel 21, so as to make the temperature of the battery cell 4 more uniform, avoid the activity of various substances in the battery cell 4 being reduced due to severe cold, and avoid the attenuation of the battery cell 4.

[0047] The coolant in the cooling channel 21 can enter the flow channel 31, so that the partition 3 and the cold plate 2 both have the effect of cooling and insulating. The partition 3 and the cold plate 2 can both cool and dissipate heat for the battery cell 4, avoid overheating of the battery cell 4 as much as possible, avoid thermal runaway of the battery cell 4 as much as possible, and increase the thermal safety of the battery pack 100.

[0048] According to the battery pack 100 of the embodiment of the utility model, by arranging the cold plate 2 and the multiple partitions 3 in the shell assembly 1, a receiving space 32 is defined between two adjacent partitions 3, and each receiving space 32 is provided with multiple battery cells 4 arranged along the first direction. The partition 3 can provide support for the multiple battery cells 4 in the first direction, so that the position of the battery cells 4 in the first direction is more reliable. The shell assembly 1 can protect the battery cells 4, the multiple partitions 3 and the cold plate 2 located inside the receiving space 32, avoid external force impact causing damage to the battery cells 4, and avoid spontaneous combustion of the battery cells 4. The coolant in the cooling channel 21 in the cold plate 2 can enter the flow channel 31 in the partition 3, so that the partition 3 and the cold plate 2 both have the effect of cooling and heat insulation. The partition 3 and the cold plate 2 can both cool and dissipate heat for the battery cells 4, try to avoid overheating of the battery cells 4, try to avoid thermal runaway of the battery cells 4, and increase the thermal safety of the battery pack 100.

[0049] The surface of the cold plate 2 close to the battery cell 4 may be coated with an insulating layer to avoid electrical connection between the cold plate 2 and the battery cell 4 , to avoid short circuit of the battery cell 4 , thereby preventing the battery cell 4 from self-igniting and increasing the thermal safety of the battery pack 100 .

[0050] In some embodiments of the present invention, Figure 7 and Figure 8 As shown, the battery pack 100 also includes an insulation plate 5, which is arranged in the shell assembly 1. The insulation plate 5 is located below the cold plate 2 and is welded to the cold plate 2. The insulation plate 5 can keep warm and insulate. The insulation plate 5 can prevent the coolant in the cold plate 2 from dissipating downward, which can reduce the change in the working temperature of the battery cell 4, enable the battery cell 4 to work at different temperatures, reduce the influence of temperature on the charging and discharging performance of the battery cell 4, and improve the working performance of the battery cell 4.

[0051] The heat preservation plate 5 is connected to the cold plate 2 by welding, so that the connection method of the heat preservation plate 5 and the cold plate 2 is relatively simple, and the connection of the heat preservation plate 5 and the cold plate 2 is relatively reliable.

[0052] In some embodiments of the present invention, Figure 5 , Figure 6 and Fig. 9 As shown, the battery cell 4 is provided with two tabs 41, and the two tabs 41 are respectively provided at the battery cell 4 along the second direction (such as Figure 1 When the tabs 41 on two adjacent battery cells 4 are connected by the connecting sheet 42, it is possible to avoid overlapping of the two tabs 41 of the same battery cell 4, to avoid short circuit of the battery cell 4 as much as possible, and to increase the safety of the electrical connection of the battery cell 4.

[0053] like Figure 6 As shown, the connecting piece 42 between the two battery cells 4 close to each other in the two adjacent accommodating spaces 32 is arranged on the partition 3, and the partition 3 can dissipate heat for the connecting piece 42 between the two battery cells 4 close to each other in the two adjacent accommodating spaces 32, so as to avoid overheating of the connecting piece 42 between the two battery cells 4 close to each other in the two adjacent accommodating spaces 32, and avoid thermal runaway of the battery cells 4. The partition 3 can be a pre-pressed plate formed by stamping or extrusion, and the partition 3 and the cold plate 2 can be connected by riveting, welding or gluing.

[0054] In addition, the multiple battery cells 4 may be divided into multiple groups along the second direction, or the multiple battery cells 4 may be divided into multiple groups along the up-down direction, and the layout of the battery cells 4 may be selected according to the installation position of the battery pack 100 .

[0055] In some embodiments of the present invention, Figure 1 and Figure 3 As shown, the housing assembly 1 includes an upper housing 11, a bottom plate 12 and a frame 13. The upper housing 11 and the bottom plate 12 define an installation space together. The cold plate 2, the partition 3 and the battery cell 4 are arranged in the installation space. The upper housing 11 and the bottom plate 12 can protect the cold plate 2 and the multiple partitions 3, and try to avoid the cold plate 2 and the multiple partitions 3 from being impacted by external forces, and try to avoid the cold plate 2 and the multiple partitions 3 from being damaged; the upper housing 11 and the bottom plate 12 can protect the battery cell 4, and avoid the battery cell 4 from being damaged by external impact, and avoid the battery cell 4 from spontaneous combustion. The cold plate 2 is arranged above the bottom plate 12, and the cold plate 2 is welded to the bottom plate 12, which can increase the reliability of the cold plate 2 and avoid damage to the cold plate 2.

[0056] The frame 13 is arranged in the installation space, the frame 13 is arranged above the cold plate 2, the frame 13 is welded to the cold plate 2, the connection between the frame 13 and the cold plate 2 is relatively simple, and the position of the frame 13 can be made more reliable. The frame 13 is a square hollow frame 13, the frame 13 surrounds the battery cell 4 and the partition 3, the frame 13 can protect the battery cell 4 and the partition 3, when the external force impacts the battery pack 100, the frame 13 can disperse and absorb a certain external impact, can reduce the impact suffered by the battery cell 4 and the partition 3, can increase the safety of the battery cell 4, avoid the battery cell 4 from being damaged by the external force impact, and avoid the battery cell 4 from spontaneous combustion.

[0057] In some embodiments of the present invention, Figure 2 and Figure 6 As shown, the battery pack 100 also includes two first pressure strips 6, which are respectively arranged at the upper parts of the two ends of the plurality of battery cells 4 along the second direction. The first pressure strips 6 are tightly connected to the partition 3, and the connection between the first pressure strips 6 and the partition 3 is relatively simple and reliable. The surface of the first pressure strip 6 close to the battery cell 4 is an insulating surface, and the first pressure strip 6 is also provided with a flange 61, and the flange 61 is in contact with the two side surfaces of the battery cell 4 along the second direction. The second direction, the first direction and the up and down directions are perpendicular to each other. The first pressure strip 6 can limit the battery cell 4 in the up and down direction, and the flange 61 can limit the battery cell 4 in the second direction. The position of the battery cell 4 is relatively reliable, and the first pressure strip 6 is insulated from the battery cell 4, which can prevent the battery cell 4 from being electrically connected to the first pressure strip 6, and can prevent the battery cell 4 from short-circuiting, thereby preventing the battery cell 4 from spontaneously igniting, and increasing the thermal safety of the battery pack 100.

[0058] Furthermore, if Figure 1 and Figure 2 As shown, the battery pack 100 further includes two side plates 7, which are respectively arranged at both ends of the battery cell 4 along the second direction, and the flange 61 and the side plates 7 are stacked and connected, and the side plates 7 are located outside the flange 61. The two side plates 7 can protect the battery cell 4 on both sides of the battery cell 4 in the second direction, increase the strength of the battery pack 100 on both sides in the second direction, and thus increase the reliability of the battery pack 100.

[0059] Furthermore, if Figure 1 and Figure 5 As shown, the battery pack 100 also includes a second pressure strip 8, which is arranged on the upper part of the battery cell 4, and the second pressure strip 8 is arranged between the two first pressure strips 6. The second pressure strip 8 can limit the battery cell 4 in the up and down directions, and the position of the battery cell 4 is relatively reliable. The surface of the second pressure strip 8 close to the battery cell 4 is an insulating surface, and the second pressure strip 8 is in contact with the upper surfaces of multiple battery cells 4. The second pressure strip 8 is insulated from the battery cell 4, which can prevent the battery cell 4 from being electrically connected to the second pressure strip 8, and can prevent the battery cell 4 from short-circuiting, thereby preventing the battery cell 4 from self-igniting, and increasing the thermal safety of the battery pack 100. The second pressure strip 8 is tightly connected to the partition 3, and the connection between the second pressure strip 8 and the partition 3 is relatively simple and reliable.

[0060] In some embodiments of the present invention, Figure 1 and Figure 4As shown, the battery pack 100 further includes an inlet pipe 9 and an outlet pipe 10, the cooling channel 21 includes a cooling inlet and a cooling outlet, the cooling inlet is connected to the inlet pipe 9, the cooling outlet is connected to the outlet pipe 10, and the inlet pipe 9 and the outlet pipe 10 are arranged on the cold plate 2. It can be understood that the coolant enters the cooling inlet through the inlet pipe 9, and flows into the cooling channel 21 in the cold plate 2 through the cooling inlet; the coolant in the cooling channel 21 can flow to the outlet pipe 10 through the cooling outlet, and flow out from the outlet pipe 10. The inlet pipe 9 and the outlet pipe 10 can meet the cooling channel 21's demand for the coolant to enter and exit, making the cold plate 2's demand for the coolant to enter and exit more conveniently, and facilitating the circulation of the coolant.

[0061] In some embodiments of the utility model, two adjacent battery cells 4 are connected by adhesive bonding, and the connection between the two adjacent battery cells 4 is relatively simple. The battery cell 4 adjacent to the partition 3 is connected by adhesive bonding to the partition 3, and the connection between the battery cell 4 adjacent to the partition 3 is relatively simple.

[0062] At the same time, two adjacent battery cells 4 can be connected by insulating glue, and the battery cell 4 adjacent to the partition 3 can be connected to the partition 3 by insulating glue, so as to avoid electrical connection between the battery cells 4 or between the battery cell 4 and the partition 3, avoid short circuit of the battery cells 4, thereby avoiding spontaneous combustion of the battery cells 4 and increasing the thermal safety of the battery pack 100.

[0063] In some embodiments of the present invention, the length of the battery cell 4 is 530-750 mm. It is understandable that the length of the battery cell 4 can be 530 mm, 540 mm, 550 mm, 560 mm, 570 mm, 580 mm, 590 mm, 600 mm, 610 mm, 620 mm, 630 mm, 640 mm, 650 mm, 660 mm, 670 mm, 680 mm, 690 mm, 700 mm, 710 mm, 720 mm, 730 mm, 740 mm or 750 mm. The length of the battery cell 4 is not less than 530 mm, which can avoid the length of the battery cell 4 being too short, which can avoid the battery cell 4 storing less energy, and can increase the energy storage of the battery pack 100; the length of the battery cell 4 is not more than 750 mm, which can avoid the battery cell 4 being too large in size, and can make the layout of the battery cell 4 in the battery pack 100 more reasonable.

[0064] In some embodiments of the present invention, the width of the battery cell 4 is 120-200 mm. It is understandable that the width of the battery cell 4 can be 120 mm, 130 mm, 140 mm, 150 mm, 160 mm, 170 mm, 180 mm, 190 mm or 200 mm. The width of the battery cell 4 is not less than 120 mm, which can avoid the length of the battery cell 4 being too short, can avoid the battery cell 4 storing less energy, and can increase the energy storage of the battery pack 100; the width of the battery cell 4 is not more than 200 mm, which can avoid the battery cell 4 being too large in size, and can make the layout of the battery cell 4 in the battery pack 100 more reasonable.

[0065] In some embodiments of the present invention, the aspect ratio of the battery cell 4 is 1-6.5. It is understandable that the aspect ratio of the battery cell 4 can be 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5, 5.5, 6 or 6.5. The aspect ratio of the battery cell 4 is not greater than 6.5, which can avoid a large difference between the length and width of the battery cell 4, and can make the layout of the battery cell 4 in the battery pack 100 more reasonable.

[0066] Other structures and operations of the battery pack 100 according to the embodiment of the present invention are known to those skilled in the art and will not be described in detail here.

[0067] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0068] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: Shell assembly; A cold plate, the cold plate is arranged in the shell assembly, and a cooling channel is arranged in the cold plate; A plurality of baffles, wherein the plurality of baffles are arranged in the shell assembly, the plurality of baffles are located above the cold plate and connected to the cold plate, the plurality of baffles are arranged along a first direction, a receiving space is defined between two adjacent baffles, a flow channel is provided in the baffle, the flow channel is connected to the cooling channel, and the first direction is perpendicular to the up-down direction; A plurality of battery cells are provided in each of the accommodating spaces and are arranged along the first direction.

2. The battery pack according to claim 1, characterized in that: Also includes: The heat preservation plate is arranged in the shell assembly, and the heat preservation plate is located below the cold plate and is welded to the cold plate.

3. The battery pack according to claim 1, characterized in that: The battery cell is provided with two pole tabs, which are respectively arranged on two sides of the battery cell along a second direction, and the second direction, the first direction and the up-down direction are perpendicular to each other.

4. The battery pack according to claim 1, characterized in that: The housing assembly comprises: Upper shell; A bottom plate, wherein the upper shell and the bottom plate together define an installation space, the cold plate, the partition plate and the battery cell are arranged in the installation space, the cold plate is arranged above the bottom plate, and the cold plate is welded to the bottom plate; A frame is arranged in the installation space, the frame is arranged above the cold plate, the frame is welded to the cold plate, the frame is a square hollow frame, and the frame surrounds the battery cell and the partition.

5. The battery pack according to claim 1, characterized in that: The battery pack further comprises: Two first pressure strips are respectively arranged at the upper parts of both ends of the multiple battery cells along the second direction, the first pressure strip is tightly connected to the partition, the surface of the first pressure strip close to the battery cell is an insulating surface, the first pressure strip is also provided with a flange, the flange is fitted with two side surfaces of the battery cell along the second direction, and the second direction, the first direction and the up and down directions are perpendicular to each other.

6. The battery pack according to claim 5, characterized in that: Also includes: Two side plates, the two side plates are respectively arranged at two ends of the battery core along the second direction, the flange and the side plates are stacked and connected, and the side plates are located outside the flange.

7. The battery pack according to claim 5, characterized in that: The battery pack further comprises: The second pressure strip is arranged on the upper part of the battery cell, the second pressure strip is arranged between two of the first pressure strips, the surface of the second pressure strip close to the battery cell is an insulating surface, the second pressure strip is in contact with the upper surfaces of the plurality of battery cells, and the second pressure strip is firmly connected to the partition.

8. The battery pack according to claim 1, characterized in that: Also includes: Inlet pipe; The cooling channel includes a cooling inlet and a cooling outlet. The cooling inlet is connected to the inlet pipe, the cooling outlet is connected to the outlet pipe, and the inlet pipe and the outlet pipe are arranged on the cold plate.

9. The battery pack according to claim 1, characterized in that: Two adjacent battery cells are connected by adhesive bonding, and the battery cell adjacent to the separator is connected by adhesive bonding.

10. The battery pack according to claim 1, characterized in that: The length of the battery cell is 530-750mm; And / or, the width of the battery cell is 120-200 mm; And / or, the aspect ratio of the battery cell is 1-6.5.

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