Battery cell group, battery and vehicle

Abstract

The utility model provides a battery cell group, battery and vehicle relates to battery technical field, the battery cell group includes a plurality of battery cells that are arranged along the first direction in order, each battery cell has two opposite end face in the first direction and a side face connected between the two end faces, the end face is provided with an output pole, and the side face is provided with a side face connected between the two end faces. An anti-explosion valve is arranged on the side face, and in every two adjacent battery cells, the output electrode of one battery cell is welded to the output electrode of the other battery cell. According to the utility model, the volume grouping rate of the batteries can be improved.

Description

Technical Field

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

[0002] With the continuous development of new energy technologies, the battery industry is increasingly inclined to develop batteries with better fast charging performance in order to improve user experience.

[0003] In related technologies, shorter cells are typically used to reduce internal resistance and thus improve the fast charging performance of the battery. However, shorter cells mean more cells in the same volume of battery. Since insulation gaps need to be maintained between adjacent cells, more cells mean more places to set insulation gaps. This results in a smaller ratio of the total cell volume to the total battery volume, which in turn affects the battery's volume packing efficiency. Utility Model Content

[0004] The problem this invention addresses is: how to improve the volumetric packing rate of batteries.

[0005] To address the aforementioned problems, this utility model provides a battery cell pack, a battery, and a vehicle.

[0006] In a first aspect, the present invention provides a battery cell assembly, comprising a plurality of battery cells arranged sequentially along a first direction. Each battery cell has two end faces opposite each other in the first direction and a side face connected between the two end faces. Each end face is provided with an output electrode, and the side face is provided with an explosion-proof valve. In two adjacent battery cells, the output electrode of one battery cell is welded to the output electrode of the other battery cell.

[0007] Optionally, the length of the battery cell is L, wherein 200mm ≤ L ≤ 400mm; and / or,

[0008] The battery cell includes two opposite sides with a larger area and two opposite sides with a smaller area, and the explosion-proof valve is disposed on the side with a smaller area of ​​the battery cell.

[0009] Optionally, the output electrode has a connection surface facing away from the end face, the connection surfaces of two adjacent output electrodes are in contact with each other, and the edges of the two connection surfaces are welded together.

[0010] Optionally, the length of the connecting surface is H1, and the length of the end face is H, wherein H1 / H ≥ 50%; and / or,

[0011] The distance of the protrusion of the output electrode relative to the end face is T, where T≥3.5mm.

[0012] Secondly, this utility model provides a battery, including a plurality of cell groups as described above and a plurality of busbars, wherein the plurality of cell groups are arranged sequentially along a second direction, the second direction intersecting with the first direction, and the busbars are connected between the output poles of the same end of two adjacent cell groups.

[0013] Optionally, it also includes a parameter acquisition piece, which is bonded to the side of the battery cell in the battery cell assembly, and the parameter acquisition piece is provided with a terminal that is connected to the output electrode of the battery cell in the battery cell assembly.

[0014] Optionally, it also includes a housing having two opposing walls, each of which is a cold plate;

[0015] The battery cell assembly is located inside the housing, and the sides of the battery cells in the battery cell assembly are respectively connected to the two housing walls.

[0016] Optionally, the explosion-proof valve of the battery cell in the battery cell assembly is disposed facing one of the enclosure walls, and an avoidance hole is provided on the enclosure wall at the position opposite to the explosion-proof valve.

[0017] Optionally, it also includes a protective plate, which is disposed outside the housing and covers the housing wall where the clearance hole is located.

[0018] Thirdly, this utility model provides a vehicle including the battery described above.

[0019] The beneficial effects of this utility model's cell assembly are as follows: The cell assembly includes multiple cells arranged sequentially along a first direction. Each cell has two opposite end faces along the first direction, and each end face is provided with an output electrode. In two adjacent cells, the output electrode of one cell is welded to the output electrode of the other cell. In other words, this solution treats two cells that would otherwise require an insulation gap as the same cell assembly. The output electrodes of two adjacent cells are directly welded together to achieve series connection, thus forming the cell assembly. There is no need to reserve an additional insulation gap between the two output electrodes, which helps increase the ratio of the total cell volume to the total battery volume. Therefore, even if... Using shorter cells to form cell packs does not increase the internal insulation gaps of the battery, thus effectively improving the battery's volumetric packing efficiency. In addition, because the insulation gap between the two output terminals is eliminated, the distance between the end faces of the two cells is smaller. If the explosion-proof valve is placed directly on the end face of the cell, it would be detrimental to pressure relief. However, this solution places the explosion-proof valve on the side of the cell, avoiding the end face position, which helps to ensure the space for smoke supply and exhaust, thus ensuring the safety of battery use. Secondly, by welding the output terminals of one cell to the output terminals of another cell, it also helps to save the use of busbars, thereby reducing costs. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the battery structure in related technologies;

[0021] Figure 2 This is a schematic diagram of the battery cell assembly according to an embodiment of the present invention;

[0022] Figure 3 This is a side view of the side where the explosion-proof valve of the battery cell is located, according to an embodiment of this utility model.

[0023] Figure 4 This is a side view of the explosion-proof valve of the battery cell in an embodiment of the present invention, facing away from the valve.

[0024] Figure 5 This is a side view of the battery cell adjacent to the explosion-proof valve in an embodiment of this utility model;

[0025] Figure 6 This is a schematic diagram of the battery cell structure at the end face in an embodiment of this utility model;

[0026] Figure 7 This is a schematic diagram showing the connection between two adjacent battery cells in an embodiment of this utility model;

[0027] Figure 8 This is a schematic diagram showing the connection between the various cell groups of the battery in an embodiment of this utility model;

[0028] Figure 9 This is a schematic diagram showing the connection of the parameter acquisition chip of the battery in an embodiment of this utility model;

[0029] Figure 10 This is a partial cross-sectional view of the battery according to an embodiment of the present invention;

[0030] Figure 11 This is a bottom view of the battery according to an embodiment of the present invention.

[0031] Explanation of reference numerals in the attached figures:

[0032] Figure 1 In the middle: 1', battery cell assembly; 11', battery cell; 111', output terminal.

[0033] Figures 2-11 In the middle: 1. Cell assembly; 11. Cell; 111. End face; 112. Side; 113. Output terminal; 1131. Connection surface; 114. Explosion-proof valve; 2. Busbar; 3. Electrical box; 4. Parameter acquisition chip; 41. Terminal; 5. Voltage acquisition board; 6. Battery main control board; 7. Housing; 71. Housing wall; 711. Clearance hole; 712. Coolant flow channel; 8. Thermal conductive adhesive; 9. Protective plate. Detailed Implementation

[0034] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Although some embodiments of this utility model are shown in the drawings, it should be understood that this utility model can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of this utility model. It should be understood that the drawings and embodiments of this utility model are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0035] In the attached diagram, the Z-axis represents the vertical direction, i.e., up and down, with the positive direction of the Z-axis representing up and the negative direction representing down. The X-axis represents the horizontal direction and is designated as the front and back position, with the positive direction of the X-axis representing the front and the negative direction representing the back. The Y-axis represents the left and right position, with the positive direction of the Y-axis representing the left and the negative direction representing the right. It should be noted that the aforementioned representations of the Z, Y, and X axes are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] The term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to"; the term "based on" means "at least partially based on"; the term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments"; and the term "optionally" means "optional embodiments". Definitions of other terms will be given in the following description. It should be noted that the concepts of "first," "second," etc., mentioned in this utility model are only used to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies.

[0037] It should be noted that the terms "one" and "multiple" used in this utility model are illustrative rather than restrictive. Those skilled in the art should understand that, unless otherwise expressly indicated in the context, they should be understood as "one or more".

[0038] In related technologies, such as Figure 1As shown, this is a schematic diagram of the structure of an existing battery. The battery includes multiple cells 11' arranged sequentially along the Y direction of the battery. The two output terminals 111' of the cell 11' are located at the two ends of the cell 11' in the X direction. The output terminals 111' of two adjacent cells 11' are connected through a busbar. The multiple cells 11' arranged sequentially in the Y direction are connected in series to form a cell group 1'. The multiple cell groups 1' are arranged sequentially along the X direction of the battery. In order to prevent the output terminals 111' of two adjacent cell groups 1' from short-circuiting each other, the two output terminals 111' need to maintain a certain insulation gap. When a shorter cell 11' is used to improve fast charging performance, the battery will have more insulation gaps, which will reduce the ratio of the total volume of the cell 11' to the total volume of the battery, thereby reducing the volume packing ratio of the battery.

[0039] To address the problems existing in the aforementioned related technologies, this utility model provides a battery cell pack, a battery, and a vehicle to improve the battery's volumetric packing efficiency. Detailed descriptions are provided below with reference to specific embodiments.

[0040] like Figures 2 to 5 As shown, the present invention provides a battery cell assembly 1, comprising a plurality of battery cells 11 arranged sequentially along a first direction. Each battery cell 11 has two end faces 111 opposite to each other in the first direction and a side face 112 connected between the two end faces 111. The end faces 111 are provided with an output electrode 113, and the side face 112 is provided with an explosion-proof valve 114. In two adjacent battery cells 11, the output electrode 113 of one battery cell 11 is welded to the output electrode 113 of the other battery cell 11.

[0041] It should be noted that the first direction refers to Figure 2 As shown in the X-axis direction, the battery cell 11 has two opposite end faces 111 in the first direction, that is, the battery cell 11 extends along the X-axis direction, or in other words, the X-axis direction is the length direction of the battery cell 11. Furthermore, the battery cell 11 can be square, and the side surface 112 can include all the lateral surfaces of the battery cell 11, specifically as follows... Figure 6 As shown, the battery cell 11 has four sides 112. Furthermore, the specific structure of the explosion-proof valve 114 is not limited. For example, the explosion-proof valve 114 can be a groove provided on the side 112, where the groove is thinner than other parts of the side 112. When the battery cell 11 experiences thermal runaway, the groove cracks to release fumes, preventing the battery cell 11 from exploding excessively, thus achieving explosion protection.

[0042] In this embodiment, the cell assembly 1 includes a plurality of cells 11 arranged sequentially along a first direction. Each cell 11 has two opposite end faces 111 in the first direction, and each end face 111 is provided with an output electrode 113. In two adjacent cells 11, the output electrode 113 of one cell 11 is welded to the output electrode 113 of the other cell 11. That is to say, this solution treats two cells 11 that require an insulation gap in related technologies as the same cell assembly 1. The output electrodes 113 of two adjacent cells 11 are directly welded to form a series connection to constitute the cell assembly 1. There is no need to reserve an additional insulation gap between the two output electrodes 113, which is beneficial to increase the ratio of the total volume of the cell 11 to the total volume of the battery. At this time, even if a shorter cell is selected, The cells 11 form the cell group 1 without increasing the insulation gap inside the battery, thus effectively improving the battery's volume packing efficiency. In addition, because the insulation gap between the two output poles 113 is eliminated, the distance between the end faces 111 of the two cells 11 is small. If the explosion-proof valve 114 is directly placed on the end face 111 of the cell 11, it would be not conducive to pressure relief. However, this solution opens the explosion-proof valve 114 on the side 112 of the cell 11, which avoids the end face 111 position, which helps to ensure the space for smoke supply and exhaust, and can ensure the safety of battery use. Secondly, by welding the output pole 113 of one cell 11 to the output pole 113 of the other cell 11, it is also beneficial to save the use of busbar 2, which can reduce costs.

[0043] Optionally, such as Figure 5 As shown, the length of the battery cell 11 is L, where 200mm≤L≤400mm.

[0044] The length of cell 11 can be selected between 200mm and 400mm, such as 200mm, 300mm, 400mm, etc.

[0045] In this optional embodiment, by limiting the length of the battery cell 11 to between 200mm and 400mm, this solution can increase the capacity of the battery cell compared to a battery cell 11 with a length of less than 200mm, and can effectively reduce the internal resistance compared to a battery cell 11 with a length of more than 500mm, thereby improving the fast charging rate and making the battery's fast charging performance better.

[0046] Optionally, such as Figure 6 and Figure 7 As shown, the output electrode 113 has a connection surface 1131 facing away from the end face 111, the connection surfaces 1131 of two adjacent output electrodes 113 are in contact with each other, and the edges of the two connection surfaces 1131 are welded to each other.

[0047] It should be noted that the connecting surface 1131 can be rectangular. The two connecting surfaces 1131 can be welded through the long side of the rectangle. Compared with welding through the short side of the rectangle, welding through the long side has better connection strength. Compared with welding through all the edges of the rectangle, welding through the long side can reduce the welding steps while ensuring connection strength, thereby reducing welding time.

[0048] In this optional embodiment, by making the connection surfaces 1131 of two adjacent output electrodes 113 fit together and welding the edges of the two connection surfaces 1131 together, the connection surfaces 1131 of the two output electrodes 113 are completely overlapped. This can relatively increase the contact area of ​​the two output electrodes 113 with a fixed size of the connection surfaces 1131, thereby ensuring that there is sufficient current flow area between the two cells 11.

[0049] Optionally, such as Figure 6 As shown, the length of the connecting surface 1131 is H1, and the length of the end face 111 is H, wherein H1 / H ≥ 50%; and / or, as Figure 5 As shown, the protrusion distance of the output pole 113 relative to the end face 111 is T, where T≥3.5mm.

[0050] Specifically, the length direction of the output electrode 113 is consistent with the length direction of the end face 111 of the cell 11, that is, the length direction of the connecting surface 1131 is consistent with the length direction of the end face 111. The ratio of the length of the connecting surface 1131 to the length of the end face 111 is greater than or equal to 50%, for example, 50%, 55%, 60%, etc. The protrusion distance of the output electrode 113 relative to the end face 111, i.e., the height of the output electrode 113, is greater than or equal to 3.5mm, for example, 3.5mm, 4mm, 4.5mm.

[0051] In this optional embodiment, by limiting the ratio of the length of the connecting surface 1131 to the length of the end face 111 to more than 50%, the connecting surface 1131 can be guaranteed to have a relatively large area, thereby increasing the current-carrying area and improving the connection strength between the two output electrodes 113. By limiting the protrusion distance of the output electrode 113 relative to the end face 111 to more than 3.5mm, sufficient distance can be guaranteed between the end faces 111 of the two cells 11 to facilitate the welding torch to extend between the two end faces 111 for welding operations. Furthermore, it should be noted that the above-mentioned H1 / H value and T value can be set selectively or simultaneously; this utility model does not impose any restrictions. Of course, the beneficial effects of setting the H1 / H value and T value simultaneously are better.

[0052] Optionally, the battery cell 11 includes two opposing sides 112 with a larger area and two opposing sides 112 with a smaller area, and the explosion-proof valve 114 is disposed on the smaller side 112 of the battery cell 11.

[0053] The four sides 112 of the battery cell 11 include two larger sides 112 and two smaller sides 112 that are arranged opposite each other. When multiple battery cell groups 1 are arranged in the battery, the larger sides of the battery cells 11 in adjacent battery cell groups 1 are usually arranged opposite each other. By placing the explosion-proof valve 114 on the smaller side 112 of the battery cell 11, it can be prevented that the smoke from the explosion-proof valve 114 will spray onto the adjacent battery cell group 1, thereby improving the safety of the battery.

[0054] like Figure 8 As shown, the present invention provides a battery comprising a plurality of cell groups 1 as described above and a plurality of busbars 2. The plurality of cell groups 1 are arranged sequentially along a second direction, the second direction intersecting the first direction. The busbars 2 are connected between the output terminals 113 at the same end of two adjacent cell groups 1.

[0055] It should be noted that the intersection of the second direction and the first direction means that the second direction can be perpendicular to the first direction or form an acute angle with it; there are no restrictions here. For example... Figure 8 As shown, the second direction can be the Y-axis direction, which is perpendicular to the first direction (X-axis direction).

[0056] Specifically, multiple battery cell groups 1 can be connected in series or parallel via bus 2. Taking series connection as an example, such as... Figure 8 As shown, the output terminal 113 at one end of the cell group 1 in the first direction is designated as the first output terminal, and the output terminal 113 at the other end of the first direction is designated as the second output terminal. In multiple cell groups 1, a busbar 2 can be connected between the first output terminal of any cell group 1 and the first output terminal of an adjacent cell group 1 located on one side of it, and a busbar 2 can be connected between the second output terminal of the cell group 1 and the second output terminal of an adjacent cell group 1 located on the other side of it, thereby realizing the series connection of multiple cell groups 1. In addition, the battery may also include an electrical box 3, and the first and last ends of the multiple cell groups 1 connected in series can be connected to the electrical box 3 through the busbar 2 to form a complete current loop.

[0057] In this embodiment, since the battery includes the aforementioned cell assembly 1, it possesses all the beneficial effects of all embodiments of the aforementioned cell assembly 1, and at least the following beneficial effects: Specifically, the cell assembly 1 includes a plurality of cells 11 arranged sequentially along a first direction. Each cell 11 has two opposite end faces 111 in the first direction, and each end face 111 is provided with an output electrode 113. In two adjacent cells 11, the output electrode 113 of one cell 11 is welded to the output electrode 113 of the other cell 11. That is to say, this solution treats two cells 11 that require an insulation gap in related technologies as the same cell assembly 1, and the output electrodes 113 of two adjacent cells 11 are directly welded to achieve series connection to form the cell assembly 1. There is no need to reserve an additional insulation gap between the two output electrodes 113, which is beneficial for increasing... The ratio of the total volume of cell 11 to the total volume of the battery ensures that even if shorter cells 11 are used to form cell group 1, the internal insulation gap of the battery will not increase, thus effectively improving the battery's volume packing efficiency. Furthermore, because the insulation gap between the two output terminals 113 is eliminated, the distance between the end faces 111 of the two cells 11 is smaller. If the explosion-proof valve 114 is directly placed on the end face 111 of the cell 11, it would be detrimental to pressure relief. This solution, by placing the explosion-proof valve 114 on the side 112 of the cell 11, precisely avoids the end face 111 position, which helps ensure sufficient space for smoke supply and exhaust, thus ensuring the safety of battery use. Secondly, by welding the output terminal 113 of one cell 11 to the output terminal 113 of the other cell 11, the use of busbar 2 is reduced, thus lowering costs.

[0058] Specifically, in this embodiment, the larger side of the cell 11 in the adjacent cell group 1 is arranged opposite to each other. By placing the explosion-proof valve 114 on the smaller side 112 of the cell 11, which is not opposite to the adjacent cell group 1, it is also possible to avoid the explosion-proof valve 114 spraying smoke towards the adjacent cell group 1 when it exhausts smoke, thereby improving the safety of the battery.

[0059] Optionally, such as Figure 9 As shown, the battery also includes a parameter acquisition piece 4, which is attached to the side 112 of the cell 11 of the cell assembly 1, and the parameter acquisition piece 4 is provided with a terminal 41 that is connected to the output electrode 113 of the cell 11 of the cell assembly 1.

[0060] It should be noted that the parameter acquisition chip 4 can be a voltage acquisition chip (voltage acquisition FPC) or a temperature acquisition chip. When the parameter acquisition chip 4 is a voltage acquisition chip, terminal 41 can be electrically connected to the output electrode 113 to detect the voltage of the battery cell 11. When the parameter acquisition chip 4 is a temperature acquisition chip, terminal 41 can contact the output electrode 113 to detect the temperature of the battery cell 11.

[0061] For example, in Figure 9In the embodiment shown, the parameter acquisition chip 4 is a voltage acquisition chip, which is disposed between two adjacent cell groups 1 and has a terminal 41 connected to the output electrode 113 of each cell 11 in the two adjacent cell groups 1. That is, each pair of adjacent cell groups 1 shares a voltage acquisition chip for voltage acquisition. In addition, the battery may also include a voltage acquisition board 5 and a battery main control board 6. The voltage acquisition chips extend along the length direction (X-axis direction) of the cell group 1. The same end of multiple voltage acquisition chips is connected to the voltage acquisition board 5 by connectors or soldering to transmit the voltage signal of the cell to the voltage acquisition board 5. Multiple voltage acquisition boards 5 can transmit the voltage signal to the battery main control board 6 through daisy chain or CAN communication, thereby realizing the acquisition of the voltage of each cell.

[0062] There are no restrictions on the method of bonding the parameter acquisition chip 4 to the battery cell assembly 1. For example, double-sided tape can be used for bonding, which is convenient to use and helps to improve bonding efficiency.

[0063] In this optional embodiment, the parameter acquisition piece 4 can be used to collect parameters of each cell 11, such as voltage or temperature, so as to better monitor the working status of the cell 11 and ensure the safety of battery use; in addition, by bonding the parameter acquisition piece 4 to the side 112 of the cell 11 of the cell group 1, the installation stability of the parameter acquisition piece 4 can be improved.

[0064] Furthermore, the parameter acquisition piece 4 can be adhered to the larger side 112 of the battery cell 11. This can further enhance the adhesion area and connection stability of the parameter acquisition piece 4, and also allow the parameter acquisition piece 4 to be located between adjacent battery cell groups 1, so as to make full use of the space between adjacent battery cell groups 1 and improve the energy density of the battery.

[0065] Optionally, such as Figure 8 and Figure 10 As shown, the battery also includes a housing 7, which has two opposing housing walls 71, each of which is a cold plate; the battery cell assembly 1 is disposed inside the housing 7, and the side 112 of the battery cell 11 of the battery cell assembly 1 is respectively connected to the two housing walls 71.

[0066] It should be noted that the cold plate can be a liquid-cooled plate with internal coolant channels 712.

[0067] Specifically, such as Figure 10 As shown, thermally conductive adhesive 8 can be provided between the side 112 of the battery cell 11 in the battery cell assembly 1 and the box wall 71. The thermally conductive adhesive 8 is used to achieve the connection between the side 112 and the box wall 71. This can ensure the stability of the connection between the side 112 and the box wall 71, and also ensure the heat conduction effect of the battery cell 11 to the box wall 71.

[0068] In this optional embodiment, by setting the two box walls 71 as cold plates respectively, and connecting the side 112 of the battery cell 11 of the battery cell group 1 to the two box walls 71 respectively, heat can be dissipated from the two side 112 of the battery cell 11 at the same time, ensuring that the heat is quickly removed during battery fast charging, so as to better utilize the fast charging performance of the battery.

[0069] Optionally, such as Figure 10 and Figure 11 As shown, the explosion-proof valve 114 of the battery cell 11 of the battery cell group 1 is disposed facing one of the box walls 71, and the box wall 71 is provided with an avoidance hole 711 at the position opposite to the explosion-proof valve 114.

[0070] In this optional embodiment, by providing a clearance hole 711 on the box wall 71 at a position opposite to the explosion-proof valve 114, when the battery cell 11 experiences thermal runaway, the fumes discharged by the explosion-proof valve 114 can be ejected out of the box 7 through the clearance hole 711 to ensure effective exhaust of the fumes, thereby improving the safety of battery use.

[0071] Optionally, such as Figure 10 As shown, the battery also includes a protective plate 9, which is disposed outside the housing 7 and covers the housing wall 71 where the clearance hole 711 is located.

[0072] In this optional embodiment, by setting a protective plate 9, which is located outside the housing 7 and covers the housing wall 71 where the clearance hole 711 is located, the protective plate 9 can form a certain space with the housing wall 71, so as to limit the emission of smoke within a certain range, avoid excessive emission of smoke and pose a threat to surrounding users. In addition, the protective plate 9 can also block external substances such as dust and moisture from entering the housing 7, prevent the internal components of the housing 7 from directly contacting these substances, and reduce the risk of battery failure.

[0073] Thirdly, this utility model provides a vehicle including the battery described above.

[0074] In this embodiment, since the vehicle includes the battery described above, it possesses all the beneficial effects of all the battery embodiments described above, which will not be repeated here.

[0075] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and all such changes and modifications will fall within the protection scope of the present invention.

Claims

1. An electric cell pack, characterized by, The battery includes a plurality of electric cells (11) arranged in sequence along a first direction, each of the electric cells (11) having two end faces (111) opposite in the first direction and a side face (112) connecting the two end faces (111), each of the end faces (111) being provided with an output pole (113), and each of the side faces (112) being provided with an explosion-proof valve (114), and the output pole (113) of one of the electric cells (11) is welded with the output pole (113) of another of the electric cells (11) in two adjacent electric cells (11).

2. The battery cell pack of claim 1, wherein, The length of the electric cell (11) is L, wherein 200mm≤L≤400mm; and / or, The electric cell (11) includes two opposite side faces (112) with a larger area and two opposite side faces (112) with a smaller area, and the explosion-proof valve (114) is arranged on the side face (112) with a smaller area of the electric cell (11).

3. The battery cell pack of claim 1, wherein, The output pole (113) has a connecting face (1131) facing away from the end face (111), the connecting faces (1131) of the output poles (113) of two adjacent electric cells (11) are in contact with each other, and the edges of the two connecting faces (1131) are welded with each other.

4. The battery cell pack of claim 3, wherein, The length of the connecting face (1131) is H1, and the length of the end face (111) is H, wherein H1 / H≥50%; and / or, The output pole (113) has a protruding distance T relative to the end face (111), wherein T≥3.5mm.

5. A battery, characterized by The battery includes a plurality of electric cell groups (1) and a plurality of busbars (2), the plurality of electric cell groups (1) are arranged in sequence along a second direction, the second direction intersects the first direction, and the busbar (2) is connected between the output poles (113) at the same end of two adjacent electric cell groups (1).

6. The battery of claim 5, wherein, The battery further includes a parameter acquisition sheet (4) bonded to the side face (112) of the electric cell (11) of the electric cell group (1), and the parameter acquisition sheet (4) is provided with a terminal (41) connected to the output pole (113) of the electric cell (11) of the electric cell group (1).

7. The battery of claim 5, wherein, The battery further includes a box body (7) having two opposite box walls (71), and the two box walls (71) are respectively provided as cold plates; The electric cell group (1) is arranged in the box body (7), and the side face (112) of the electric cell (11) of the electric cell group (1) is connected to the two box walls (71) respectively.

8. The battery of claim 7, wherein, The explosion-proof valve (114) of the electric cell (11) of the electric cell group (1) is arranged towards one of the box walls (71), and a relief hole (711) is formed in the box wall (71) opposite to the explosion-proof valve (114).

9. The battery of claim 8, wherein, The battery further includes a protective plate (9) arranged outside the box body (7) and covering the box wall (71) where the relief hole (711) is located.

10. A vehicle characterized by comprising: The battery includes the battery as claimed in any one of claims 5 to 9.

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