Battery pack and powered device

Abstract

The application discloses a battery pack and an electric device, and the battery pack comprises a tray, the tray is provided with a structural beam; a battery cell group, the battery cell group is arranged in the tray and comprises at least two battery cells, and two adjacent battery cells are respectively located on two sides of the structural beam in a first direction; an insulating piece, the insulating piece is arranged on one side of the structural beam in a second direction and is provided with a glue injection space, and at least one side of the insulating piece in the first direction is provided with an open port, so that the adhesive in the glue injection space flows between the structural beam and the battery cell on the corresponding side, wherein the first direction and the second direction are perpendicular to each other. Therefore, the insulating piece can guide the flow of the adhesive, so that the adhesive flows more stably and smoothly in the glue injection space and between the structural beam and the end face of the battery cell on the corresponding side, the bonding area of the battery cell with the insulating piece and the structural beam is ensured, and therefore the structural reliability of the battery pack can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a battery pack and a power consumption device. BACKGROUND

[0002] With the development of electric vehicles, as one of the cores of electric vehicles, the power battery system is facing higher and higher safety and reliability challenges. Generally, the battery pack equipped on the electric vehicle is assembled into a module by a battery pack, and then the module is installed in the battery pack to form a three-level assembly mode of battery pack-module-battery pack. The assembly form of battery-battery pack is to integrate the battery directly into the battery pack, thereby saving the intermediate module architecture, simplifying the structure of the battery pack and improving the space utilization.

[0003] In the related art, the battery pack is provided with a tray. For the assembly form of battery-battery pack, although the space utilization of the battery pack can be improved, the plurality of batteries are directly arranged in the tray, and the stability of the arrangement of the batteries in the tray is low, and the overall structural strength and reliability of the battery pack is low. SUMMARY

[0004] The present application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of the present application is to provide a battery pack, which is more stable and reliable in structure.

[0005] The present application further provides a power consumption device.

[0006] The battery pack according to the embodiments of the present application comprises: a tray provided with a structural beam; a cell group arranged in the tray and comprising at least two cells, adjacent two cells being located on both sides of the structural beam in a first direction; an insulating piece arranged on one side of the structural beam in a second direction and provided with a glue injection space, the insulating piece being provided with an open port on at least one side in the first direction to enable the adhesive in the glue injection space to flow between the structural beam and the corresponding side of the cell, wherein the first direction and the second direction are perpendicular to each other.

[0007] Therefore, by arranging the glue injection space on the insulating piece and providing the open port on at least one side of the insulating piece in the first direction, after the cell group is arranged on both sides of the structural beam in the first direction, only the adhesive needs to be injected into the glue injection space, and the insulating piece can guide the flow of the adhesive, so that the adhesive flows more stably and smoothly in the glue injection space and between the structural beam and the corresponding side of the cell end face, ensuring the bonding area of the cell with the insulating piece and the structural beam, thereby improving the structural reliability of the battery pack.

[0008] In some examples of the present application, the insulating member has a bottom wall adjacent to the structural beam in the second direction, and the bottom wall is provided with a glue overflow channel on a side surface facing the glue injection space, and the glue overflow channel is in communication with the open hole.

[0009] In some examples of the present application, the insulating member is provided with an open hole on both sides in the first direction, and the glue overflow channel is in communication with the two open holes.

[0010] In some examples of the present application, the glue overflow channel comprises a plurality of sub-glue overflow channels, and the plurality of sub-glue overflow channels are arranged at intervals.

[0011] In some examples of the present application, the sub-glue overflow channels are arc-shaped and arranged at intervals in the radial direction.

[0012] In some examples of the present application, the insulating member is provided with a plurality of limiting plates arranged at intervals in a third direction, the limiting plates are arranged on the bottom wall, and the glue injection space is formed between adjacent two limiting plates and the bottom wall, one end of the glue overflow channel is open towards the limiting plate, and the other end is open towards the open hole, and the third direction is the extension direction of the structural beam.

[0013] In some examples of the present application, the structural beam is provided with a first clamping part, the insulating member is provided with a second clamping part, and the first clamping part and the second clamping part are clamped and matched.

[0014] In some examples of the present application, the battery cell group comprises a plurality of battery cells, and the plurality of battery cells are arranged in sequence and electrically connected to each other on one side of the structural beam in the first direction.

[0015] In some examples of the present application, a connecting row is electrically connected between adjacent two battery cells in the first direction and / or in the third direction, the connecting row comprises a first connecting part and a second connecting part, the first connecting part is electrically connected to the pole of one of the adjacent two battery cells, and the second connecting part is electrically connected to the pole of the other of the adjacent two battery cells.

[0016] In some examples of the present application, the first connecting part is provided with a first fixing member, the first fixing member is fixedly connected with the second connecting part to lock the first connecting part and the second connecting part; and / or, the second connecting part is provided with a second fixing member, the second fixing member is fixedly connected with the first connecting part to lock the first connecting part and the second connecting part.

[0017] In some examples of the present application, the first connecting portion has a plurality of first fixing members arranged at intervals, and a first gap is formed between two adjacent first fixing members, and the second fixing member is fixed in the first gap to lock the first connecting portion and the second connecting portion; and / or, the second connecting portion has a plurality of second fixing members arranged at intervals, and a second gap is formed between two adjacent second fixing members, and the first fixing member is fixed in the second gap to lock the first connecting portion and the second connecting portion.

[0018] In some examples of the present application, a surface of the first connecting portion along a thickness direction thereof is in contact with a surface of the second connecting portion along a thickness direction thereof.

[0019] In some examples of the present application, one end of the first connecting portion and the second connecting portion is bendably connected to each other.

[0020] In some examples of the present application, the connecting row between two adjacent battery cells in the first direction is located in the glue injection space.

[0021] In some examples of the present application, the battery cell group has an explosion-proof valve, and the tray is provided with an explosion-proof air vent valve, and the explosion-proof valve is adapted to be in communication with the explosion-proof air vent valve.

[0022] In some examples of the present application, the tray is provided with a flow guide cover, and the flow guide cover is in communication with the explosion-proof valve and the explosion-proof air vent valve, respectively.

[0023] In some examples of the present application, the battery pack further comprises a collection module, and the collection module comprises a collection circuit board and a sampling member, one end of the sampling member is electrically connected to the collection circuit board, and the other end is electrically connected to the battery cell group.

[0024] In some examples of the present application, the sampling member comprises a plurality of sub-sampling members, and the plurality of sub-sampling members are arranged in layers.

[0025] In some examples of the present application, the tray is provided with a power distribution box, and the power distribution box is located at one end of the battery cell group in a third direction, and the power distribution box has a circuit board accommodating space, and the collection circuit board is arranged in the circuit board accommodating space.

[0026] In some examples of the present application, at least one side of the circuit board accommodating space in the second direction is provided with a limiting groove, and one end of the collection circuit board in the second direction is in limiting fit with the limiting groove.

[0027] In some examples of the present application, the battery pack further comprises a limiting block, the power distribution box has a first surface and a second surface on both sides of the second direction, wherein the first surface is recessed towards the second surface to form the circuit board accommodating space, the circuit board accommodating space is provided with an opening on one side towards the first surface, and the limiting block is arranged at the opening and provided with the limiting groove.

[0028] In some examples of the present application, the battery pack further comprises an upper cover plate, the tray and the upper cover plate jointly enclose a cell accommodating space, and the cell group is arranged in the cell accommodating space and provided with a glue layer between the cell group and the tray and / or the upper cover plate.

[0029] The power consumption device according to the embodiment of the present application comprises the battery pack described above.

[0030] Additional aspects and advantages of the present application will be given in part in the following description, become apparent from the following description, or be understood through practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0031] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0032] Figure 1 is a schematic view of a battery pack according to an embodiment of the present application;

[0033] Figure 2 is a schematic view of another perspective of a battery pack according to an embodiment of the present application;

[0034] Figure 3 is an exploded view of a battery pack according to an embodiment of the present application;

[0035] Figure 4 is a schematic view of a tray according to an embodiment of the present application;

[0036] Figure 5 is a schematic view of a cell group according to an embodiment of the present application;

[0037] Figure 6 is a schematic view of a connecting row according to an embodiment of the present application; Figure 5

[0038] Figure 7

[0039] Figure 8 is a partial exploded view of a battery pack according to an embodiment of the present application;

[0040] Figure 9 is a partial schematic view of a battery pack according to an embodiment of the present application;​​

[0041] Figure 10 is a partial schematic view of a battery pack according to an embodiment of the present application;

[0042] Figure 11 is a schematic view of a collection module and a distribution box according to an embodiment of the present application;

[0043] Figure 12 is a partial schematic view of a collection module and a distribution box according to an embodiment of the present application;

[0044] Figure 13 is a schematic view of a collection module according to an embodiment of the present application;

[0045] Figure 14 is a partial schematic view of a sampling piece according to an embodiment of the present application.

[0046] Reference signs:

[0047] 100, battery pack;

[0048] 10, tray; 11, structural beam; 111, first clamping portion; 12, explosion-proof breather valve; 13, side beam; 131, exhaust hole; 14, electric core accommodating space;

[0049] 20, electric core group; 21, electric core; 211, explosion-proof valve; 212, pole; 22, connecting row; 221, first connecting portion; 2211, first fixing piece; 2212, first welding surface; 2213, first notch; 222, second connecting portion; 2221, second fixing piece; 2222, second welding surface; 2223, second notch; 23, busbar;

[0050] 30, insulating piece; 31, glue injection space; 311, open port; 312, limiting plate; 313, bottom wall; 32, overflow glue flow channel; 321, sub-overflow glue flow channel; 33, second clamping portion;

[0051] 40, flow guide cover;

[0052] 50, collection module; 51, collection circuit board; 52, sampling piece; 521, sub-sampling piece; 5211, notch; 5212, sampling point;

[0053] 60, distribution box; 61, circuit board accommodating space; 62, limiting groove; 63, limiting block; 64, elastic buffer piece; 65, first surface; 66, second surface; 67, opening;

[0054] 70, upper cover plate; 71, cold plate; 72, thermal insulation cotton; 73, bottom guard plate. DETAILED DESCRIPTION

[0055] Embodiments of the present application are described in detail below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary, and embodiments of the present application are described in detail below.

[0056] Reference is made below to Figures 1-14 A battery pack 100 according to an embodiment of the present application is described below, which can be applied to an electrical device, including but not limited to a vehicle.

[0057] Reference is made below to Figures 1-10 As shown in the drawings, in the embodiment of the present application, from the perspective of the battery pack 100, the first direction is one of the length direction and the width direction of the battery pack 100, the third direction is the other of the length direction and the width direction of the battery pack 100, and the second direction is the thickness direction or the height direction of the battery pack 100. From the perspective of the structural beam 11, the first direction is one of the length direction and the width direction of the structural beam 11, the third direction is the other of the length direction and the width direction of the structural beam 11, and the second direction is the thickness direction or the height direction of the structural beam 11. In the battery pack 100, the first direction, the second direction, and the third direction of the structural beam 11 are consistent with those of the battery pack 100.

[0058] Reference is made below to Figures 1-10 As shown in the drawings, the battery pack 100 according to the present application can mainly include a tray 10, a cell group 20, and an insulating member 30, wherein the bottom wall of the tray 10 is provided with a structural beam 11, the cell group 20 is arranged in the tray 10, the cell group 20 can include at least two cells 21, the two adjacent cells 21 are respectively located on both sides of the first direction of the structural beam 11, the insulating member 30 is arranged on one side of the second direction of the structural beam 11, the insulating member 30 is provided with a glue injection space 31, and the insulating member 30 is provided with an open port 311 on at least one side of the first direction to allow the adhesive in the glue injection space 31 to flow between the structural beam 11 and the corresponding side of the cell 21, wherein the first direction and the second direction are perpendicular to each other.

[0059] Specifically, by arranging the cell group 20 in the tray 10, and making the cell group 20 include at least two cells 21, the at least two cells 21 are electrically connected, so that the battery pack 100 can be formed by directly arranging a plurality of cell groups 20 in the tray 10, without modularizing and partitioning the plurality of cells 21, thereby improving the compactness of the battery pack 100, improving the volume utilization rate of the battery pack 100, and reducing the number of parts. The cell 21 can be a short-blade cell, and the electrical connection of the at least two cells 21 can form a long-blade battery.

[0060] Further, by setting the structural beam 11 at the bottom of the tray 10, the overall structural strength of the tray 10 can be improved. By setting the insulating piece 30 on one side of the structural beam 11 in the second direction, setting the glue injection space 31 in the insulating piece 30, and setting the open port 311 on at least one side of the insulating piece 30 in the first direction, and arranging the two adjacent battery cells 21 on both sides of the structural beam 11 in the first direction, the open port 311 can correspond to the battery cells 21 on both sides of the structural beam 11 in the first direction, and the electrical connection of the two adjacent battery cells 21 can be arranged in the glue injection space 31. On the one hand, the insulating piece 30 can insulate the electrical connection of the two adjacent battery cells 21 to prevent short circuit between the electrical connections of the battery cell groups 20 arranged in the third direction. On the other hand, the glue injection space 31 can be injected with adhesive, and the insulating piece 30 can guide the adhesive to connect the electrical connection of the two adjacent battery cells 21 and the insulating piece 30, so as to stably arrange the electrical connection of the two adjacent battery cells 21 in the insulating piece 30 and improve the structural reliability of the battery pack 100.

[0061] Further, considering that at least one side of the insulating piece 30 in the first direction is provided with the open port 311, i.e., at least one side of the glue injection space 31 in the first direction is open to the corresponding battery cell 21, the adhesive can flow more stably and smoothly along the open port 311 between the structural beam 11 and the end face of the battery cell 21 on the corresponding side under the guidance of the insulating piece 30 after the glue injection space 31 is injected with adhesive, ensuring the stable arrangement of the battery cell group 20 in the insulating piece 30. The bonding area between the structural beam 11 and the end face of the battery cell 21 on at least one side can be ensured, the structural beam 11 and the battery cell 21 on at least one side can be bonded, the battery cell group 20 and the tray 10 can be bonded into a whole structure, the strength of the middle part of the battery pack 100 can be improved, the middle deformation can be reduced, the structural strength of the battery pack 100 can be further improved, and the structural reliability of the battery pack 100 can be improved.

[0062] In order to adapt to the plurality of battery cell groups 20 in the battery pack 100, a plurality of glue injection spaces 31 can be arranged on the insulating piece 30, and an open port 311 can be arranged on one side of each glue injection space 31 in the first direction, and the two adjacent open ports 311 can be arranged on both sides of the first direction. In this way, the structural beam 11 and the corresponding battery cell 21 can be bonded, and the bonding force between the plurality of battery cell groups 20 and the structural beam 11 in the first direction can be more evenly distributed, thereby improving the structural reliability of the battery pack 100.

[0063] Of course, the open port 311 can also be arranged on both sides of the injection space in the first direction, so that not only the injection speed of the adhesive can be improved, but also the structural beam 11 can be bonded with the battery cells 21 on both sides in the first direction, so that the connection strength between the battery cell group 20 and the structural beam 11 can be further improved, and the structural reliability of the battery pack 100 can be further improved.

[0064] Therefore, by arranging the injection space 31 on the insulating piece 30 and arranging the open port 311 on both sides of the insulating piece 30 in the first direction, after the battery cell group 20 is arranged on both sides of the structural beam 11 in the first direction, the electrical connection inside the battery cell group 20 can be located in the injection space 31, and the adhesive only needs to be injected into the injection space 31. The insulating piece 30 can guide the flow of the adhesive, so that the adhesive can flow more stably and smoothly in the injection space 31 and between the structural beam 11 and the end face of the battery cell 21 on the corresponding side, ensuring the bonding area of the battery cell 21 with the insulating piece 30 and the structural beam 11 respectively, thereby improving the structural reliability of the battery pack 100.

[0065] In combination Figures 8-10 As shown, the insulating piece 30 has a bottom wall 313 adjacent to the structural beam 11 in the second direction, and the overflow channel 32 is arranged on the side surface of the bottom wall 313 facing the injection space 31, and the overflow channel 32 is in communication with the open port 311.

[0066] Specifically, by arranging the overflow channel 32 on the side surface of the bottom wall 313 facing the injection space 31, and making the overflow channel 32 in communication with the open port 311, the adhesive injected into the injection space 31 can further flow into the overflow channel 32 after flowing to the bottom wall 313 under the action of gravity. The overflow channel 32 can define the flow path of the adhesive, more quickly and reliably guide the adhesive to the open port 311, and further guide the adhesive between the structural beam 11 and the battery cell 21 on the corresponding side, thereby improving the flow guiding effect of the insulating piece 30 on the adhesive.

[0067] In combination Figures 8-10 As shown, the insulating piece 30 is arranged with the open port 311 on both sides in the first direction, and the overflow channel 32 is in communication with the two open ports 311. In this way, after the adhesive is injected into the injection space 31, the adhesive can flow to the two open ports 311 under the flow guiding action of the overflow channel 32, and further flow between the structural beam 11 and the end face of the battery cell 21 on both sides. Not only can the flow rate of the adhesive be further improved, but also the uniform distribution of the adhesive on both sides in the first direction can be ensured, so that the adhesive can bond the structural beam 11 with the battery cells 21 on both sides in the first direction, thereby further ensuring the connection strength between the structural beam 11 and the battery cells 21 on both sides, and improving the structural reliability of the battery pack 100.

[0068] In combinationFigure 10 As shown, the overflow flow channel 32 can include a plurality of sub-overflow flow channels 321, which are arranged at intervals. Specifically, by arranging a plurality of sub-overflow flow channels 321 at intervals, when the adhesive flows to the bottom wall 313 of the glue injection space 31, it can first flow into a plurality of sub-overflow flow channels 321, and then flow out from both sides of the open port 311 under the action of the flow splitting and guiding of the plurality of sub-overflow flow channels 321, and further flow between the structural beam 11 and the corresponding side of the battery cell 21, thereby improving the guiding effect of the overflow flow channel 32 on the adhesive, making the distribution of the adhesive between the structural beam 11 and the corresponding side of the battery cell 21 more uniform, ensuring the uniformity of the amount of glue between the structural beam 11 and the corresponding side of the battery cell 21, ensuring the bonding area, and further improving the structural reliability of the battery pack 100.

[0069] Further, in combination with Figures 8-10 As shown, the sub-overflow flow channels 321 are each arc-shaped, and the plurality of sub-overflow flow channels 321 are arranged at intervals in the radial direction.

[0070] Specifically, by making the sub-overflow flow channels 321 arc-shaped, the overflow flow channel 321 can guide the adhesive from the collection point to a more distant location, thereby increasing the guiding area of the overflow flow channel 32, allowing the adhesive to flow uniformly into the gap between the structural beam 11 and the corresponding side of the battery cell 21, making the amount of glue between the structural beam 11 and the battery cell 21 uniform, and making the distribution of the bonding force between the structural beam 11 and the battery cell 21 more uniform and reliable, thereby further improving the reliability of the battery pack 100.

[0071] It should be noted that the sub-overflow flow channels 321 can also be linear or wavy, thereby increasing the flow rate of the adhesive or directing the adhesive to a more distant location, which is not limited specifically herein and can be selected according to the application scenario in actual production.

[0072] In one specific embodiment of the present application, in combination with Figure 10 As shown, the overflow flow channel 32 can include four sub-overflow flow channels 321, which are each circular arc-shaped, concentrically arranged and arranged at intervals in the radial direction, and have the same width, thereby making the number and width of the sub-overflow flow channels 321 more reasonable according to the size of the bottom wall 313 in the third direction, not only allowing the adhesive to flow uniformly between the structural beam 11 and the corresponding side of the battery cell 21 under the flow guiding action of the four sub-overflow flow channels 321, but also ensuring the flow rate of the adhesive in the four sub-overflow flow channels 321, avoiding a too small flow rate of the adhesive that causes the adhesive to reach only a small amount or even not to reach the structural beam 11 and the corresponding side of the battery cell 21 before solidification, and ensuring the amount of glue between the structural beam 11 and the corresponding side of the battery cell 21 to meet the bonding requirements, thereby ensuring the structural reliability of the battery pack 100.

[0073] In combination Figure 2 As shown, the insulating piece 30 is provided with a plurality of limiting plates 312 arranged in the third direction, the limiting plates 312 are arranged on the bottom wall 313, and the limiting plates 312 and the bottom wall 313 between the adjacent two limiting plates 312 form the glue injection space 31, one end opening 67 of the glue overflow channel 32 faces the limiting plate 312, and the other end opening 67 faces the open port 311, wherein the third direction is the extension direction of the structural beam 11.

[0074] Specifically, the extension direction of the structural beam 11 is defined as the third direction, a plurality of limiting plates 312 arranged in the third direction are arranged on the insulating piece 30, and the limiting plates 312 are arranged on the bottom wall 313, so that the limiting plates 312 and the bottom wall 313 between the adjacent two limiting plates 312 can form the glue injection space 31, so that after the electrical connection inside the battery cell group 20 is arranged in the glue injection space 31, the two sides of the electrical connection in the third direction are arranged apart from the limiting plate 312, the limiting plate 312 can not only play a limiting role for the battery cell group 20, but also ensure the order of the arrangement of the plurality of battery cell groups 20 in the third direction, and can also play an insulating role for the adjacent battery cell groups 20, preventing short circuit between the adjacent battery cell groups 20.

[0075] Further, the limiting plates 312 and the bottom wall 313 between the adjacent two limiting plates 312 form the glue injection space 31, so that when the adhesive is injected into the glue injection space from the second direction, the adhesive can flow in the glue injection space 31, the limiting plate 312 can block the adhesive, and the overflow of the adhesive in the third direction can be reduced, so that the adhesive can flow from the open port 311 in the first direction to between the structural beam 11 and the corresponding side of the battery cell 21, thereby improving the accuracy of glue injection and improving the glue injection effect.

[0076] In addition, considering that the electrical connection of the adjacent two battery cells 21 is located in the glue injection space 31, when the adhesive is injected into the glue injection space 31 from the second direction, the electrical connection of the adjacent two battery cells 21 will block the adhesive, so that the adhesive can be blocked into the gap between the electrical connection on one side and the limiting plate 312, and the adhesive flows to the bottom wall 313 and collects on the bottom wall 313.

[0077] By making one end opening of the glue overflow channel 32 face the limiting plate 312 and the other end opening face the open port 311, when the adhesive flows to the bottom wall 313, it can first flow into one end opening of the glue overflow channel 32, and then flow out from the open port 311 on both sides under the guidance of the glue overflow channel 32, and further flow to between the structural beam 11 and the corresponding side of the battery cell 21, thereby further optimizing the structural design of the glue overflow channel 32, ensuring that the adhesive can flow to between the structural beam 11 and the battery cell 21 on both sides in the first direction, and making the glue amount between the structural beam 11 and the battery cell 21 on both sides in the first direction uniform.

[0078] It should be noted that after the limiting plate 312 is arranged on the insulating piece 30, the open hole 311 on the side facing the battery cell 21 can be completely open or partially open, and the specific size can be determined according to the size of the connecting row 22 between the two battery cells 21, which is not limited here.

[0079] In combination Figure 8 As shown, the structural beam 11 is provided with a first clamping part 111, and the insulating piece 30 is provided with a second clamping part 33, and the first clamping part 111 and the second clamping part 33 are clamped and matched. Specifically, by arranging the first clamping part 111 on the upper part of the structural beam 11 and arranging the second clamping part 33 in the second direction of the insulating piece 30, only the clamping and matching of the first clamping part 111 and the second clamping part 33 is needed to set the insulating piece 30 on the structural beam 11, which can make the setting of the insulating piece 30 on the structural beam 11 more simple and reliable.

[0080] Further, the first clamping part 111 can be arranged in multiple, and the multiple first clamping parts 111 are arranged in the third direction of the structural beam 11, and the second clamping part 33 is arranged in multiple, and the multiple second clamping parts 33 correspond to the multiple first clamping parts 111 one by one, so that multiple clamping and matching can be formed between the insulating piece 30 and the structural beam 11, preventing the third direction length of the structural beam 11 from being too large, and the clamping and matching force between the insulating piece 30 and the structural beam 11 from being insufficient, thereby further improving the stable and reliable connection between the insulating piece 30 and the structural beam 11.

[0081] Optionally, the first clamping part 111 can be arranged as a clamping groove, and the second clamping part 33 can be arranged as a clamping hook, only by inserting the clamping hook into the clamping groove, the clamping and matching between the first clamping part 111 and the second clamping part 33 can be realized, thereby the structural design of the first clamping part 111 and the second clamping part 33 can be optimized, not only the matching speed and accuracy between the first clamping part 111 and the second clamping part 33 can be improved, but also the stability and reliability between the first clamping part 111 and the second clamping part 33 can be improved.

[0082] In some embodiments of the present application, in combination Figure 3 and Figure 5As shown, the cell group 20 can mainly include a plurality of cells 21, and the plurality of cells 21 are electrically connected to each other in the first direction. Specifically, the plurality of cells 21 can be connected in series in the first direction, thereby forming a cell group 20, and the plurality of cell groups 20 are arranged in sequence in the third direction, and the plurality of cell groups 20 are electrically connected to each other through the bus bar 23, that is, the cells 21 in the battery pack 100 are arranged in series in sequence, thereby the structure of the battery pack 100 can be more simple on the premise of improving the volume utilization rate of the battery pack 100. In an embodiment of the present application, the cell group 20 includes two cells 21 electrically connected in the first direction, which will not be described here.

[0083] In some other embodiments of the present application, the cell group 20 can include a plurality of cells 21, and the plurality of cells 21 are located on one side of the structural beam 11 in the first direction, and arranged in sequence and electrically connected to each other in the third direction. Specifically, the plurality of cells 21 in a cell group 20 can be located on one side of the structural beam 11 in the first direction, and the plurality of cells 21 are arranged in sequence and electrically connected in the third direction, and the plurality of cells 21 are connected in series in the third direction, thereby the cells 21 in the battery pack 100 can also be arranged in series in sequence, and the normal work of the battery pack 100 is ensured. Wherein, the pole 212 can be arranged on two adjacent surfaces of the cell 21, or arranged on the same end, that is, the end close to the structural beam 11 or the end away from the structural beam 11.

[0084] In combination with Figure 5 and Figure 6 As shown, the connecting bar 22 is electrically connected between the adjacent two cells 21 in the first direction or in the third direction, and the connecting bar 22 can mainly include a first connecting part 221 and a second connecting part 222, the first connecting part 221 is electrically connected with the pole 212 of one of the adjacent two cells 21, and the second connecting part 222 is electrically connected with the pole 212 of the other of the adjacent two cells 21, thereby the electrical connection between the adjacent two cells 21 can be realized, and the electrical connection between the adjacent two cells 21 can be more simple and convenient. Wherein, the connecting bar 22 and the pole 212 can be connected by welding.

[0085] In combination with Figure 6 and Figure 7 As shown, the first connecting part 221 is provided with a first fixing part 2211, the first fixing part 2211 is connected and fixed with the second connecting part 222, the second connecting part 222 is provided with a second fixing part 2221, and the second fixing part 2221 is connected and fixed with the first connecting part 221.

[0086] Specifically, in order to ensure the folding design of the connecting row 22, the thickness of the connecting row 22 can be reduced, but the reduction of the thickness will reduce the overcurrent capacity of the connecting row 22. By arranging the first fixing member 2211 on the first connecting portion 221 and the second fixing member 2221 on the second connecting portion 222, after the first connecting portion 221 and the second connecting portion 222 are folded and adhered to each other, the first fixing member 2211 can be connected and fixed with the second connecting portion 222, and the second fixing member 2221 can be connected and fixed with the first connecting portion 221, so as to lock the first connecting portion 221 and the second connecting portion 222, ensure the relative adhering contact and electrical connection between the first connecting portion 221 and the second connecting portion 222 in the first direction, increase the effective current conducting path and the current conducting area, thereby improving the overcurrent capacity, and maintain the folded state of the first connecting portion 221 and the second connecting portion 222, so as to keep the two battery cells 21 in the shape of parallel arrangement in the first direction, and improve the structural reliability of the battery pack 100.

[0087] It should be noted that the first fixing member 2211 can be arranged only on the first connecting portion 221, and the first fixing member 2211 can be connected and fixed with the second connecting portion 222, so as to lock the first connecting portion 221 and the second connecting portion 222. The second fixing member 2221 can be arranged only on the second connecting portion 222, and the second fixing member 2221 can be connected and fixed with the first connecting portion 221, so as to lock the first connecting portion 221 and the second connecting portion 222. Here, no specific limitation is made, and the production can be made according to actual needs.

[0088] Further, as shown in Figure 7 , the first connecting portion 221 can have a plurality of first fixing members 2211 arranged at intervals, and adjacent two first fixing members 2211 can have a first gap 2213. The second connecting portion 222 can have a plurality of second fixing members 2221 arranged at intervals, and adjacent two second fixing members 2221 can have a second gap 2223. After the first connecting portion 221 and the second connecting portion 222 are folded and adhered to each other, the first fixing member 2211 and the second fixing member 2221 can be staggered with each other, the first fixing member 2211 can be fixed in the second gap 2223, so as to lock the first connecting portion 221 and the second connecting portion 222, and the second fixing member 2221 can be fixed in the second gap 2223, so as to lock the first connecting portion 221 and the second connecting portion 222. In this way, the mutual locking between the first connecting portion 221 and the second connecting portion 222 can be achieved.

[0089] In some embodiments of the present application, as shown in Figures 5-7As shown, the first fixing member 2211 is a first buckle, which is arranged to be foldable relative to the first connecting part 221 and is fixedly connected with the second connecting part 222 by buckling, and the second fixing member 2221 is a second buckle, which is arranged to be foldable relative to the second connecting part 222 and is fixedly connected with the first connecting part 221 by buckling.

[0090] Specifically, by setting the first fixing member 2211 as a first buckle, after the first connecting part 221 and the second connecting part 222 are folded and adhered to each other, only the first fixing member 2211 needs to be folded relative to the first connecting part 221, so that the first fixing member 2211 is fixedly connected with the second connecting part 222, and the connection between the first fixing member 2211 and the second connecting part 222 is more simple and reliable.

[0091] Further, after the first connecting part 221 and the second connecting part 222 are folded and adhered to each other, only the second fixing member 2221 needs to be folded relative to the second connecting part 222, so that the second fixing member 2221 is fixedly connected with the first connecting part 221, and the connection between the second fixing member 2221 and the first connecting part 221 is more simple and reliable.

[0092] In combination Figure 7 As shown, one surface of the first connecting part 221 along the thickness direction thereof is in contact with one surface of the second connecting part 222 along the thickness direction thereof. Specifically, one surface of the first connecting part 221 along the thickness direction thereof is defined as a first welding surface 2212, and one surface of the second connecting part 222 along the thickness direction thereof is defined as a second welding surface 2222. After the first connecting part 221 and the second connecting part 222 are folded relative to each other, the first welding surface 2212 and the second welding surface 2222 can be in contact, and the first welding surface 2212 and the second welding surface 2222 are welded and fixed. In this way, the overcurrent capacity of the connecting row 22 can be further improved, and the two battery cells 21 can be kept in the shape of being parallel in the first direction, so that the reliability of the battery pack 100 can be further improved, and the working performance of the battery pack 100 can be improved.

[0093] In combination Figures 5-9 As shown, one end of the first connecting part 221 and one end of the second connecting part 222 are foldably connected with each other, and the first connecting part 221 and the second connecting part 222 are located in the glue injection space 31.

[0094] Specifically, by bendably connecting one end of the first connecting part 221 and the second connecting part 222 to each other, after the two electric cores 21 are electrically connected by the connecting row 22, the first connecting part 221 can be bent relative to the second connecting part 222, and the first connecting part 221 and the second connecting part 222 are in contact and electrically connected in the first direction, so that the first direction electrical connection between the two electric cores 21 can be realized, the flow path is increased, and the normal work of the battery pack 100 is ensured.

[0095] Further, after the two electric cores 21 are electrically connected by the connecting row 22, the basic structure of the electric core group 20 can be formed, the connecting row 22 and the pole 212 of the two electric cores 21 constitute the electrical connection inside the electric core group 20, by setting the first connecting part 221 and the second connecting part 222 of the connecting row 22 in the glue injection space 31, the stable connection between the connecting row 22 and the insulating piece 30 can be realized, not only the insulating piece 30 can position and insulate the two adjacent connecting rows 22 in the third direction, but also the problem of movement of the connecting row 22 when the battery pack 100 expands can be reduced, and the poor contact caused by the movement of the connecting row 22 can be avoided, so that the reliability of the battery pack 100 can be further improved.

[0096] In combination Figure 5 As shown, the first direction two ends of the electric core group 20 are respectively provided with the explosion-proof valve 211, and the tray 10 is provided with the explosion-proof air valve 12, and the explosion-proof valve 211 is adapted to be in communication with the explosion-proof air valve 12. Specifically, high-pressure gas is generated when the electric core 21 works, and when the pressure inside the electric core 21 is too high, the explosion-proof valve 211 will automatically open to release the high-pressure gas to the outside environment, thereby reducing the pressure inside the electric core 21 and effectively preventing the risk of explosion of the electric core 21.

[0097] Considering that the two adjacent electric cores 21 in the electric core group 20 are connected in series, by setting two kinds of electric cores 21, the explosion-proof valve 211 of one kind of electric core 21 is arranged on the positive electrode end face, and the explosion-proof valve 211 of the other kind of electric core 21 is arranged on the negative electrode end face, and the two kinds of electric cores 21 are arranged in series and spaced apart from each other in the first direction, the first direction two ends of the electric core group 20 can be respectively provided with the explosion-proof valve 211, so that after the electric core group 20 is arranged in the tray 10, the explosion-proof valve 211 of the electric core 21 can be distributed close to the edge beam 13 of the tray 10, and the explosion-proof valve 211 of the electric core 21 can be in communication with the explosion-proof air valve 12 on the tray 10, thereby shortening the exhaust path of the electric core 21, improving the exhaust efficiency of the battery pack 100, and improving the safety of the battery pack 100.

[0098] In combination Figure 3 and Figure 4 As shown, the tray 10 is provided with a flow guide cover 40, and the flow guide cover 40 is in communication with the explosion-proof valve 211 and the explosion-proof air valve 12, respectively.

[0099] Specifically, by arranging the flow guide cover 40 between the first direction both ends of the battery cell group 20 and the side beam 13 of the tray 10, and arranging the flow guide cover 40 to extend in the third direction, the flow guide cover 40 is communicated with the explosion-proof valve 211 at the first direction one end of the plurality of battery cell groups 20, so that the high-pressure gas released by the plurality of battery cells 21 can enter the flow guide cover 40.

[0100] Further, the explosion-proof vent valve 12 is arranged at the first direction both ends of the tray 10, and the exhaust passage and a plurality of exhaust holes 131 arranged at intervals are arranged in the side beam 13 on both sides of the first direction of the tray 10, the plurality of exhaust holes 131 are communicated with the flow guide cover 40, and the exhaust passage is communicated with the plurality of exhaust holes 131 and the explosion-proof vent valve 12, so that the high-pressure gas entering the flow guide cover 40 can further flow into the exhaust passage through the exhaust holes 131 under the flow guiding effect of the flow guide cover 40, and then flow out from the explosion-proof vent valve 12.

[0101] In this way, the high-pressure gas in the battery cell 21 can be released to ensure the normal operation of the battery cell 21, and the exhaust of the battery cell 21 can be oriented to achieve electrical separation and avoid arc ignition and affect the thermal runaway of other battery cells 21. In addition, unlike the prior art which discharges at the bottom of the battery cell to achieve electrical separation, the structure of the battery cell 21 of the present application is simpler, without the need to increase the cost and manufacturing difficulty of the battery cell 21.

[0102] In combination with FIGS. 1-4, Figure 3 and Figure 13 As shown in FIGS. 1-4, the battery pack 100 can further include a collection module 50, which can mainly include a collection circuit board 51 and a sampling piece 52, one end of the sampling piece 52 is electrically connected with the collection circuit board 51, and the other end is electrically connected with the battery cell group 20.

[0103] Specifically, during the operation of the battery pack 100, the voltage and temperature of the battery cell 21 need to be sampled and monitored. Considering that a plurality of battery cell groups 20 are arranged at intervals in the battery pack 100, by arranging two sampling pieces 52 and electrically connecting them to the first direction both ends of the collection circuit board 51, and by electrically connecting one end of each sampling piece 52 to the collection circuit board 51 and the other end to the battery cell group 20, the sampling piece 52 can collect the voltage and temperature of the battery cell 21 on both sides of the first direction of the structural beam 11 and transmit them to the collection circuit board 51, thereby facilitating the monitoring of the voltage and temperature of each battery cell 21.

[0104] In some embodiments of the present application, one end of the sampling piece 52 is welded and fixed to the collection circuit board 51, which not only improves the connection stability and reliability between the sampling piece 52 and the collection circuit board 51, and improves the reliability of the collection module 50, but also makes the sampling piece 52 and the collection circuit board 51 form an integral whole, achieving high integration of the collection module 50.

[0105] It should be noted that in some other embodiments of the present invention, one end of the sampling component 52 can also be plugged and fixed to the acquisition circuit board 51. In this way, while ensuring the high integration of the acquisition module 50, it is easy to replace the sampling component 52 or the acquisition circuit board 51 separately, which can reduce maintenance costs.

[0106] Combine Figure 3 As shown, the collection circuit board 51 is spaced apart and arranged on one side of the battery cell group 20 in the third direction, and one end of the sampling component 52 is electrically connected to the end of the collection circuit board 51 in the first direction, and the other end is electrically connected to the end of the battery cell group 20 in the first direction.

[0107] Specifically, multiple battery cell groups 20 are spaced apart in the third direction. By arranging the collection circuit board 51 on one side of the battery cell group 20 in the third direction, not only can the collection circuit board 51 avoid multiple battery cell groups 20 and make full use of the space on one side of the third direction of the battery cell group 20, but it can also facilitate the arrangement of the sampling component 52 on both sides of the first direction of the battery cell group 20, so that one end of the sampling component 52 is electrically connected to the end of the collection circuit board 51 in the first direction, and the other end is electrically connected to the end of the battery cell group 20 in the first direction, thereby reducing the number of components of the collection module 50, reducing the space occupied by the collection module 50, and improving the integration of the collection module 50.

[0108] Combine Figure 14 As shown, the sampling piece 52 is provided with a plurality of notches 5211 arranged at intervals, and sampling points 5212 are provided at positions of the sampling piece 52 corresponding to the notches 5211, and a sampling point 5212 is provided at a position between two adjacent notches 5211 of the sampling piece 52. The sampling point 5212 is electrically connected to the battery cell group 20. In this way, a sampling piece 52 can have a plurality of sampling points 5212, so that a sampling piece 52 can be conveniently provided with the voltage and temperature of multiple battery cells 21, thereby reducing the number of components of the collection module 50, reducing the occupied space of the collection module 50, and further improving the integration of the collection module 50.

[0109] It should be noted that the sampling point 5212 can be set only at the position of the sampling piece 52 corresponding to the notch 5211, or the sampling point 5212 can be set only at the position between two adjacent notches 5211 of the sampling piece 52. This is not limited here. In actual production, the selection can be made according to the application scenario and the number of battery cells 21 that need to be sampled.

[0110] Combine Figure 14 As shown, the sampling element 52 may include a plurality of sub-sampling elements 521 , and the plurality of sub-sampling elements 521 are stacked.

[0111] Specifically, the battery pack 100 is provided with a plurality of battery cell groups 20 arranged in sequence in the third direction, and the sampling member 52 comprises a plurality of sub-sampling members 521, so that one sub-sampling member 521 can collect a part of the plurality of battery cell groups 20, and the sampling member 52 can monitor the battery cells 21 in the plurality of battery cell groups 20.

[0112] Further, a positioning column can be arranged on one of the two adjacent sub-sampling members 521, and a positioning hole can be arranged on the other, so that the positioning column and the positioning hole can be used to position the assembly of the two adjacent sub-sampling members 521, and the positioning column can be fixed by heat melting, so as to realize the stacking of the plurality of sub-sampling members 521. In this way, the sampling member 52 can have a large number of sampling strings and a small surface area, and the integration of the collection module 50 can be further improved, and the structural compactness of the collection module 50 can be improved.

[0113] In combination with Figure 11 and Figure 12 As shown in the drawings, the tray 10 is provided with a power distribution box 60, the power distribution box 60 is located at one end of the plurality of battery cell groups 20 in the third direction, the power distribution box 60 is provided with a circuit board accommodating space 61, and the collection circuit board 51 is arranged in the circuit board accommodating space 61.

[0114] Specifically, the power distribution box 60 is arranged at one end of the plurality of battery cell groups 20 in the third direction, and the circuit board accommodating space 61 is arranged in the power distribution box 60. When the collection module 50 is arranged in the battery pack 100, the collection circuit board 51 can be arranged in the circuit board accommodating space 61, so as to not only ensure the stable arrangement of the collection circuit board 51 and the collection module 50 in the battery pack 100, but also protect the collection circuit board 51 from being damaged.

[0115] In combination with Figure 11 and Figure 12 As shown in the drawings, at least one side of the circuit board accommodating space 61 in the second direction is provided with a limiting groove 62, and one end of the collection circuit board 51 in the second direction is limited and matched with the limiting groove 62.

[0116] Specifically, the limiting groove 62 is arranged at least on one side of the circuit board accommodating space 61 in the second direction. After the collection circuit board 51 is arranged in the circuit board accommodating space 61, one end of the collection circuit board 51 in the second direction can be limited and matched with the limiting groove 62, so as to avoid the movement of the collection circuit board 51 in the circuit board accommodating space 61, which can drive the sampling member 52 and affect the sampling of the voltage and temperature of the battery cell 21 by the collection module 50.

[0117] The elastic buffer 64 can be arranged in the limiting groove 62, and the end of the acquisition circuit board 51 is located in the elastic buffer 64. Thus, the elastic buffer 64 can buffer the impact force, avoid hard contact between the acquisition circuit board 51 and the power distribution box 60, and further avoid structural damage of the acquisition circuit board 51.

[0118] In combination Figure 11 and Figure 12 As shown in FIGS. 1, 2, and 3, the battery pack 100 can further include a limiting block 63, and the power distribution box 60 has a first surface 65 and a second surface 66 on two sides in the second direction. The first surface 65 is recessed toward the second surface 66 to form a circuit board containing space 61. An opening 67 is arranged on one side of the circuit board containing space 61 toward the first surface 65, and the limiting block 63 is arranged in the opening 67. The limiting groove 62 is arranged on the limiting block 63.

[0119] Specifically, the first surface 65 is recessed toward the second surface 66, the limiting groove 62 can be directly formed on one side of the circuit board containing space 61 toward the second surface 66, and the limiting block 63 is arranged at the opening of the circuit board containing space 61. The limiting groove 62 is arranged in the limiting block 63. Thus, during assembly of the battery pack 100, the acquisition circuit board 51 can be arranged in the circuit board containing space 61 first, and one end of the acquisition circuit board 51 in the second direction is limited and matched with the limiting groove 62 of the circuit board containing space 61. Then, the limiting block 63 is arranged at the opening of the circuit board containing space 61, and the other end of the acquisition circuit board 51 in the second direction is limited and matched with the limiting groove 62 in the limiting block 63. Thus, the two ends of the acquisition circuit board 51 in the second direction can be limited, the stable arrangement of the acquisition circuit board 51 in the circuit board containing space 61 is further improved, and the installation of the acquisition circuit board 51 in the circuit board containing space 61 is facilitated.

[0120] In combination Figure 3 As shown in FIGS. 1, 2, and 3, the battery pack 100 can further include an upper cover plate 70, and the tray 10 and the upper cover plate 70 jointly enclose a cell containing space 14. The cell group 20 is arranged in the cell containing space 14. A glue layer is arranged between the cell group 20 and the tray 10 and between the cell group 20 and the upper cover plate 70.

[0121] Specifically, the bottom of the tray 10 is sequentially stacked with a cold plate 71, thermal insulation cotton 72, and a bottom protection plate 73. Thus, the cell group 20 can be supported and protected. The glue can be uniformly coated on the bottom of the cell group 20, and then the tray 10 is inverted and clamped on the cell 21. After turning over, the jig increases the pre-tightening force for pressure retention and curing. Thus, the glue layer can be arranged between the cell group 20 and the tray 10, and the stable and reliable connection between the bottom of the cell group 20 and the tray 10 can be achieved.

[0122] Further, the upper side of the tray 10 is open, and the upper cover plate 70 is arranged on the upper side of the tray 10, so that the tray 10 and the upper cover plate 70 can jointly enclose the battery cell containing space 14, and the battery cell group 20 is located in the battery cell containing space 14. The upper cover plate 70 and the tray 10 can protect the battery cell group 20, avoid the erosion of foreign matters or the impact of external force on the structure of the battery cell 21, ensure the normal work of the battery cell 21, and the glue layer arranged between the upper cover plate 70 and the top of the plurality of battery cell groups 20 can stably and reliably connect the top of the plurality of battery cell groups 20 and the upper cover plate 70.

[0123] In this way, the battery cell 21, the tray 10 and the upper cover plate 70 can form an integral whole, the structural strength of the upper part, the lower part and the middle part of the battery pack 100 can be ensured, and the structural reliability of the battery pack 100 can be improved.

[0124] It should be noted that the adhesive injected into the glue injection space 31 is different from the adhesive coated on the bottom and top of the battery cell group 20. The adhesive injected into the glue injection space 31 can be aerogel or glue, and the adhesive coated on the bottom and top of the battery cell group 20 is heat-conducting adhesive. In actual production, the actual needs can be selected, and no specific limitation is made here.

[0125] The power consuming device according to the present application can mainly include the above-mentioned battery pack 100. Specifically, by applying the battery pack 100 to the power consuming device, the safety and reliability of the power consuming device can be improved, and the cost of the power consuming device can be reduced, thereby improving the product competitiveness of the power consuming device.

[0126] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms “center”, “longitudinal”, “transverse”, “length”, “width”, “thickness”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential” and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0127] In the description of the present application, the description referring to the terms “one embodiment”, “some embodiments”, “exemplary embodiment”, “example”, “specific example” or “some examples” means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example.

[0128] While embodiments of the application have been shown and described, it is to be understood that the application is not limited to the details of the embodiments described, since the scope of the application will be defined with respect to the claims and their equivalents.

Claims

1. A battery pack, characterized in that: include: A pallet (10), wherein the pallet (10) is provided with a structural beam (11); A battery cell group (20), the battery cell group (20) being arranged in the tray (10) and comprising at least two battery cells (21), wherein two adjacent battery cells (21) are respectively located on both sides of the structural beam (11) in a first direction; An insulating member (30), the insulating member (30) being arranged on one side of the structural beam (11) along the second direction and being provided with a glue injection space (31), the insulating member (30) being provided with an open opening (311) on at least one side along the first direction so that glue in the glue injection space (31) flows between the structural beam (11) and the battery cell (21) on the corresponding side, wherein the first direction and the second direction are perpendicular to each other.

2. The battery pack according to claim 1, wherein: The insulating member (30) has a bottom wall (313) adjacent to the structural beam (11) along the second direction, and a glue overflow channel (32) is provided on a surface of the bottom wall (313) facing the glue injection space (31), and the glue overflow channel (32) is connected to the open opening (311).

3. The battery pack according to claim 2, wherein: The insulating member (30) is provided with open openings (311) on both sides along the first direction, and the overflow glue channel (32) is connected to the two open openings (311).

4. The battery pack according to claim 2 or 3, characterized in that: The overflow glue flow channel (32) comprises a plurality of sub-overflow glue flow channels (321), and the plurality of sub-overflow glue flow channels (321) are arranged at intervals.

5. The battery pack according to claim 4, characterized in that: The sub-overflow glue flow channels (321) are all arc-shaped and arranged at intervals in the radial direction.

6. The battery pack according to claim 2 or 3, characterized in that: The insulating member (30) is provided with a plurality of limit plates (312) spaced apart along a third direction, the limit plates (312) being provided on the bottom wall (313), and the glue injection space (31) being formed between two adjacent limit plates (312) and the bottom wall (313), one end of the overflow glue channel (32) opening toward the limit plate (312), and the other end opening toward the open opening (311), wherein the third direction is the extension direction of the structural beam (11).

7. The battery pack according to claim 1, wherein: The structural beam (11) is provided with a first clamping portion (111), and the insulating member (30) is provided with a second clamping portion (33); the first clamping portion (111) and the second clamping portion (33) are clamped and matched.

8. The battery pack according to claim 1, wherein: The battery cell group (20) comprises a plurality of battery cells (21), and the plurality of battery cells (21) are located on one side of the structural beam (11) along the first direction, and are arranged in sequence in the third direction and electrically connected to each other.

9. The battery pack according to claim 8, characterized in that: A connection row (22) is electrically connected between two adjacent battery cells (21) along a first direction and / or along a third direction, and the connection row (22) comprises a first connection portion (221) and a second connection portion (222), wherein the first connection portion (221) is electrically connected to a pole (212) of one of the two adjacent battery cells (21), and the second connection portion (222) is electrically connected to a pole (212) of the other of the two adjacent battery cells (21).

10. The battery pack according to claim 9, characterized in that: The first connecting portion (221) is provided with a first fixing member (2211), and the first fixing member (2211) is connected and fixed to the second connecting portion (222) to lock the first connecting portion (221) and the second connecting portion (222); And / or, the second connecting portion (222) is provided with a second fixing member (2221), and the second fixing member (2221) is connected and fixed to the first connecting portion (221) to lock the first connecting portion (221) and the second connecting portion (222).

11. The battery pack according to claim 10, characterized in that: The first connecting portion (221) has a plurality of first fixing members (2211) arranged at intervals, a first notch (2213) is provided between two adjacent first fixing members (2211), and the second fixing member (2221) is fixed to the first notch (2213) to lock the first connecting portion (221) and the second connecting portion (222); And / or, the second connecting portion (222) has a plurality of second fixing members (2221) arranged at intervals, a second notch (2223) is provided between two adjacent second fixing members (2221), and the first fixing member (2211) is fixed to the second notch (2223) to lock the first connecting portion (221) and the second connecting portion (222).

12. The battery pack according to claim 11, wherein: A surface of the first connecting portion (221) along its thickness direction contacts a surface of the second connecting portion (222) along its thickness direction.

13. The battery pack according to any one of claims 9 to 12, characterized in that: One end of the first connecting portion (221) and one end of the second connecting portion (222) are bendably connected to each other.

14. The battery pack according to any one of claims 9 to 12, wherein along the first direction, the connecting row (22) between two adjacent battery cells (21) is located in the glue injection space (31).

15. The battery pack according to claim 1, wherein: The battery cell group (20) has an explosion-proof valve (211), an explosion-proof vent valve (12) is provided on the tray (10), and the explosion-proof valve (211) is suitable for being connected to the explosion-proof vent valve (12).

16. The battery pack according to claim 15, characterized in that: A flow guide cover (40) is provided in the tray (10), and the flow guide cover (40) is respectively connected to the explosion-proof valve (211) and the explosion-proof ventilation valve (12).

17. The battery pack according to claim 1, wherein: The device further comprises a collection module (50), wherein the collection module (50) comprises a collection circuit board (51) and a sampling component (52), wherein one end of the sampling component (52) is electrically connected to the collection circuit board (51), and the other end is electrically connected to the battery cell group (20).

18. The battery pack according to claim 17, characterized in that: The sampling component (52) comprises a plurality of sub-sampling components (521), and the plurality of sub-sampling components (521) are stacked.

19. The battery pack according to claim 17, wherein: A distribution box (60) is provided in the tray (10), the distribution box (60) being located at one end in the third direction of the plurality of battery cell groups (20), the distribution box (60) having a circuit board accommodating space (61), and the acquisition circuit board (51) being arranged in the circuit board accommodating space (61).

20. The battery pack according to claim 19, wherein: A limiting groove (62) is provided on at least one side of the circuit board accommodating space (61) along the second direction, and one end of the acquisition circuit board (51) along the second direction is limitedly engaged with the limiting groove (62).

21. The battery pack according to claim 20, characterized in that: The distribution box (60) further comprises a limit block (63), wherein the distribution box (60) has a first surface (65) and a second surface (66) on both sides along the second direction, wherein the first surface (65) is recessed toward the second surface (66) to form the circuit board accommodating space (61), and an opening (67) is provided on the side of the circuit board accommodating space (61) facing the first surface (65), the limit block (63) is arranged at the opening (67), and the limit groove (62) is provided on the limit block (63).

22. The battery pack according to claim 1, wherein: The battery pack (20) further comprises an upper cover plate (70), wherein the tray (10) and the upper cover plate (70) together enclose a battery cell accommodating space (14), the battery cell group (20) is arranged in the battery cell accommodating space (14), and an adhesive layer is provided between the battery cell group (20) and the tray (10) and / or the upper cover plate (70).

23. An electrical device, characterized in that: A battery pack (100) comprising any one of claims 1-22.

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