Pouch cell assembly and battery pack

Abstract

A pouch cell assembly (100) and a battery pack. The pouch cell assembly (100) comprises pouch cells (10), a heat conducting member (20), and a heat dissipating member (30). Each pouch cell (10) comprises a tab sealing edge (12). The heat conducting member (20) is in contact with the tab sealing edge (12). The heat conducting member (20) is further in contact with the heat dissipating member (30) to transfer heat at the tab sealing edge (12) to the heat dissipating member (30).

Description

Soft-pack battery cells and battery packs Technical Field

[0001] This application relates to the field of battery technology, and in particular to a pouch cell assembly and battery pack. Background Technology

[0002] To meet market demand, the energy density of battery cells continues to rise. The increase in energy density leads to an increase in the heat load of the battery cells. When using pouch cells, a lot of heat will be generated at the tab sealing edge. However, current related technologies lack design considerations for heat dissipation at the tab sealing edge. As a result, the overall lifespan of the final battery pack is easily shortened due to poor heat dissipation.

[0003] Summary of the Invention

[0004] According to various embodiments of this application, this application provides a pouch cell assembly and a battery pack.

[0005] This application first provides a pouch cell assembly, including a pouch cell, a thermally conductive component, and a heat dissipation component; the pouch cell includes a tab sealing edge, the thermally conductive component contacts the tab sealing edge, and the thermally conductive component also contacts the heat dissipation component, for transferring heat from the tab sealing edge to the heat dissipation component.

[0006] In one embodiment, the contact area between the tab seal and the thermally conductive element is coated with a thermally conductive material; and / or, the contact area between the thermally conductive element and the heat dissipation element is coated with a thermally conductive material.

[0007] In one embodiment, the heat dissipation component is a liquid cooling plate with coolant disposed inside.

[0008] In one embodiment, the heat-conducting element includes a heat-conducting pipe and a phase change heat-conducting material, wherein the phase change heat-conducting material is housed within the heat-conducting pipe.

[0009] In one embodiment, the heat-conducting element further includes a liquid transfer element housed within the heat-conducting pipe for transferring liquid phase change heat-conducting material.

[0010] In one embodiment, the heat-conducting element includes a heat-absorbing portion and a heat-dissipating portion connected to each other, the heat-absorbing portion being used to contact the tab sealing edge, and the heat-dissipating portion being used to contact the heat-dissipating element.

[0011] In one embodiment, the heat dissipation section is higher than the heat absorption section.

[0012] In one embodiment, the tab sealing edge has a thickness direction and a length direction; along the thickness direction, the heat-conducting element includes a first branch and a second branch arranged in sequence; both the first branch and the second branch include the heat-absorbing portion; along the length direction, the first branch and the second branch are connected to at least one side of the pouch cell, and the connection point between the first branch and the second branch is configured as the heat dissipation portion.

[0013] In one embodiment, the second branch includes a first sub-branch and a second sub-branch; along the length direction, the first sub-branch and the second sub-branch are respectively connected to the two ends of the first branch.

[0014] In one embodiment, along the thickness direction, two side-by-side pouch cells form a pouch cell group, and the pouch cell assembly includes at least one pouch cell group arranged sequentially along the thickness direction; the pouch cell group is arranged in a one-to-one correspondence with the heat-conducting element, and the first branch and the second branch of each heat-conducting element are respectively located on opposite sides of the corresponding pouch cell group.

[0015] In one embodiment, the pouch cell assembly further includes an elastic element sandwiched between two pouch cells of the pouch cell assembly and located at the tab sealing edge.

[0016] In one embodiment, the tab seal has a thickness direction and a length direction; along the length direction, the heat sink is disposed on one side of the pouch cell and the heat sink contacts the heat conductor, and / or, along the thickness direction, at least one side of the tab seal contacts the heat conductor.

[0017] In one embodiment, a plurality of heat sinks are provided, and the plurality of heat sinks are arranged at intervals along the length direction, with a plurality of pouch cells arranged along the thickness direction between adjacent heat sinks.

[0018] In one embodiment, the tab sealing edge further has a first direction, and the thickness direction and the length direction are both perpendicular to the first direction; the pouch cell assembly further includes a heat dissipation connecting plate, each heat dissipation component is connected to the same side of the heat dissipation connecting plate along the first direction, and the tab sealing edge is located along the first direction on the side of the pouch cell away from the heat dissipation connecting plate.

[0019] This application also provides a battery pack including the aforementioned pouch cell assembly.

[0020] Details of one or more embodiments of this application are set forth in the following drawings and description. Other features, objects, and advantages of this application will become apparent from the specification, drawings, and claims. Attached Figure Description

[0021] To better describe and illustrate embodiments and / or examples of the inventions disclosed herein, reference may be made to one or more accompanying drawings. Additional details or examples used to describe the drawings should not be considered as limiting the scope of any of the disclosed inventions, the currently described embodiments and / or examples, or the best mode of these inventions as currently understood.

[0022] Figure 1 is a perspective view of the structure of a pouch cell assembly in one embodiment of this application.

[0023] Figure 2 is a front view of the soft-pack battery cell and thermal conductive component in Figure 1.

[0024] Figure 3 is a partial top view of Figure 1.

[0025] Figure 4 is a schematic cross-sectional view of the pouch cell assembly at point AA in Figure 3.

[0026] Figure 5 is a three-dimensional schematic diagram of the pouch cell assembly and thermal conductive components in Figure 1.

[0027] Figure 6 is a schematic diagram of the structure of a pouch cell assembly in another embodiment of this application.

[0028] Reference numerals: 100, pouch cell assembly; 101, pouch cell group; 10, pouch cell; 11, tab; 12, tab sealing edge; 20, heat-conducting component; 21, heat-conducting pipe; 21A, first branch; 21B, second branch; 21B1, first sub-branch; 21B2, second sub-branch; 22, heat-absorbing part; 23, heat-dissipating part; 24, transition connection part; 30, heat-dissipating component; 40, elastic component; 50, heat-dissipating connecting plate; H, first direction; D, thickness direction; L, length direction. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0030] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0033] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] To meet market demand, the energy density of battery cells continues to rise. The increase in energy density leads to an increase in the heat load of the battery cells. When using pouch cells, a lot of heat will be generated at the tab sealing edge. However, current related technologies lack design considerations for heat dissipation at the tab sealing edge. As a result, the overall lifespan of the final battery pack is easily shortened due to poor heat dissipation.

[0036] Referring to Figures 1 to 6, this application provides a pouch cell assembly 100, including a pouch cell 10, a thermally conductive element 20, and a heat sink 30; the pouch cell 10 includes a tab seal 12, the thermally conductive element 20 contacts the tab seal 12, and the thermally conductive element 20 also contacts the heat sink 30, for transferring heat from the tab seal 12 to the heat sink 30.

[0037] With this configuration, the present application can transfer heat to the heat sink 30 through the heat-conducting element 20 located at the tab edge 12, thereby significantly improving the heat dissipation effect of the tab edge 12, and further improving the heat dissipation effect of the tab 11 at the tab edge 12. This enhances the thermal management performance of the final assembled battery pack and effectively reduces or avoids the risk of failure or shortened lifespan of the finished battery pack due to poor heat dissipation. Furthermore, when assembling the pouch cells 10, there is already a gap between the tab edges 12 of adjacent pouch cells 10. The heat-conducting element 20 does not require additional space to contact the tab edge 12, meaning that the installation of the heat-conducting element 20 will not increase the external dimensions of the final finished battery pack, thus avoiding any impact on the volumetric energy density of the battery pack. In addition, during heat conduction, the heat-conducting element 20 contacts the tab edge 12 rather than directly contacting the tab 11, achieving electrical insulation between the heat-conducting element 20 and the tab 11, effectively preventing damage to the pouch cells 10.

[0038] In one embodiment, the contact area between the tab seal 12 and the heat-conducting element 20 is coated with a thermally conductive material. It is understood that in other embodiments, the contact area between the heat-conducting element 20 and the heat sink 30 may also be coated with a thermally conductive material. The thermally conductive material can reduce contact thermal resistance and facilitate heat transfer. It is understood that the thermally conductive material includes, but is not limited to, thermally conductive adhesives, thermally conductive grease, etc.

[0039] For example, in this embodiment, the contact points between the tab sealing edge 12 and the heat-conducting component 20, and between the heat-conducting component 20 and the heat dissipation component 30, are coated with heat-conducting material.

[0040] In one embodiment, the heat sink 30 is a liquid cooling plate with coolant inside. The liquid cooling plate with coolant inside can accelerate the cooling rate of the heat-conducting component 20 and improve heat dissipation efficiency.

[0041] Referring to Figure 1, in one embodiment, the heat-conducting component 20 includes a heat-conducting pipe 21 and a phase change thermally conductive material, with the phase change thermally conductive material housed within the heat-conducting pipe 21. The phase change thermally conductive material can be a liquid-gas phase change thermally conductive material. This material absorbs heat at the contact point between the heat-conducting pipe 21 and the tab seal 12, transforming from a liquid to a gaseous state. It then releases heat at the contact point between the heat-conducting pipe 21 and the heat sink 30, transforming back from a gaseous state to a liquid state, and flows back to the contact point between the heat-conducting pipe 21 and the tab seal 12. This cycle repeats, accelerating the heat transfer efficiency of the heat-conducting component 20 and continuously transporting the heat generated at the tab seal 12 to the heat sink 30, thereby accelerating the heat dissipation of the pouch cell 10. In one embodiment, the phase change thermally conductive material can also be a solid-gas phase change thermally conductive material.

[0042] In one embodiment, the heat-conducting element 20 further includes a liquid transfer element (not shown), which is housed within the heat-conducting pipe 21 and is used to transfer the liquid phase change heat-conducting material. With this configuration, when a liquid-gas phase change heat-conducting material is used, the liquid transfer element can increase the flow rate of the liquid phase change heat-conducting material, promoting its return to the contact tab sealing edge 12 of the heat-conducting pipe 21. Exemplarily, the liquid transfer element can be made of a capillary porous material.

[0043] Referring to Figures 1 and 2, in one embodiment, the heat-conducting element 20 includes an absorber portion 22 and a dissipator portion 23 connected to each other. The absorber portion 22 is used to contact the tab sealing edge 12, and the dissipator portion 23 is used to contact the heat sink 30. This facilitates the flow of phase change thermally conductive material between the dissipator portion 23 and the absorber portion 22.

[0044] Referring to Figures 1, 2, and 5, in one embodiment, the heat dissipation section 23 is higher than the heat absorption section 22. With this arrangement, the liquid phase change thermally conductive material can vaporize from the lower heat absorption section 22 (used for contacting the tab sealing edge 12) and naturally rise to the higher heat dissipation section 23 (used for contacting the heat dissipation component 30). After liquefying back to liquid state at the heat dissipation section 23, it can naturally flow back to the heat absorption section 22 under the influence of gravity. This allows the thermal conductivity cycle of the thermally conductive component 20 to be natural and rapid without adding other structures.

[0045] Referring to Figures 2 and 5, by way of example, a transition connection 24 is provided between the heat absorption part 22 and the heat dissipation part 23. The transition connection 24 is inclined and the heat absorption part 22 and the heat dissipation part 23 are connected and communicated through the transition connection 24.

[0046] Referring to Figures 2, 3, and 4, in one embodiment, the tab seal 12 has a thickness direction D and a length direction L. Along the thickness direction D, the heat-conducting element 20 includes a first branch 21A and a second branch 21B arranged sequentially. Both the first branch 21A and the second branch 21B include a heat-absorbing portion 22. Along the length direction L, the first branch 21A and the second branch 21B are connected on at least one side of the pouch cell 10, and the connection point of the first branch 21A and the second branch 21B is configured as a heat dissipation portion 23. With this configuration, the heat-absorbing portions 22 of the first branch 21A and the second branch 21B can simultaneously absorb heat on the surfaces of the two tab seals 12 and simultaneously transfer heat to the heat dissipation portion 23 at the side connection point. Thus, the heat-absorbing portions 22 of the first branch 21A and the second branch 21B effectively increase the heat-conducting area of ​​the heat-conducting element 20 in contact with the tab seal 12, which is beneficial for cooperating with the heat dissipation portion 23 to improve the heat dissipation efficiency of the heat-conducting element 20.

[0047] Referring to Figures 1 to 3, in one embodiment, the heat pipe 21 is circumferentially bent and not closed, and there is a predetermined distance between the two ends of the heat pipe 21 along its length direction L. In other words, the heat-conducting element 20 is circumferentially bent along the tab seal 12 and formed into a ring structure with an opening on one side of the tab seal 12.

[0048] Thus, compared to the closed annular structure, the open annular structure of the heat-conducting component 20 can moderately reduce the structural strength of the heat-conducting component 20, which is beneficial to reduce the accuracy requirements of the dimensions of the heat-conducting component 20 when assembling the heat-conducting component 20 with the soft-pack battery cell 10, facilitates the production and installation of the heat-conducting component 20, and the preset distance can provide a certain buffer space to reduce the damage that may be caused by stress or installation errors during the installation process.

[0049] Referring again to Figures 2 to 4, exemplarily, in one embodiment, the second branch 21B includes a first sub-branch 21B1 and a second sub-branch 21B2; along the length direction L, the first sub-branch 21B1 and the second sub-branch 21B2 are respectively connected to both ends of the first branch 21A. In other words, the first sub-branch 21B1 and the second sub-branch 21B2 position the opening of the heat-conducting component 20 on the side opposite to the first branch 21A, and both segments of the second branch 21B along the length direction L are connected to the first branch 21A, allowing the first branch 21A and the second branch 21B to share two heat dissipation parts 23.

[0050] This configuration maximizes the area of ​​the heat-absorbing part 22 and the heat-dissipating part 23, effectively balancing heat conduction and improving heat dissipation efficiency while reducing the structural strength of the heat-conducting component 20.

[0051] It is understood that in other embodiments, along the length direction L, the first branch 21A and the second branch 21B may also be connected only on one side of the tab seal 12. That is, along the length direction L, the opening of the heat-conducting element 20 is located on one side of the pouch cell 10, and the first branch 21A and the second branch 21B share a heat dissipation part 23.

[0052] Referring to Figures 1, 3, and 5, in one embodiment, two parallel pouch cells 10 form a pouch cell group 101 along the thickness direction D. The pouch cell assembly 100 includes at least one pouch cell group 101 arranged sequentially along the thickness direction D. Each pouch cell group 101 corresponds to a heat-conducting element 20, with the first branch 21A and the second branch 21B of each heat-conducting element 20 located on opposite sides of the corresponding pouch cell group 101. This arrangement, compared to one heat-conducting element 20 corresponding to one pouch cell 10, effectively reduces the number of heat-conducting elements 20 by having the first branch 21A and the second branch 21B of the heat-conducting element 20 located on opposite sides of the pouch cell group 101. While ensuring heat dissipation for the tab sealing edge 12 of each pouch cell 10, it also reduces the weight of the final assembled battery pack, improves assembly efficiency, and lowers costs.

[0053] Referring again to Figures 1, 3, and 4, in one embodiment, the pouch cell assembly 100 further includes an elastic element 40. The elastic element 40 is sandwiched between two pouch cells 10 of the pouch cell assembly 101 and is located at the tab seal 12. This arrangement allows the elastic element 40 to press the tab seal 12 towards the first branch 21A or the second branch 21B along the thickness direction D, improving the contact stability between the tab seal 12 and the heat-conducting element 20 and ensuring stable and effective heat exchange.

[0054] It is understandable that the elastic element 40 may include, but is not limited to, the use of rebound foam.

[0055] Referring to Figure 1, in one embodiment, the tab sealing edge 12 has a thickness direction D and a length direction L; along the length direction L, the heat sink 30 is disposed on one side of the pouch cell 10, and the heat sink 30 contacts the heat conductor 20. In this way, the original spatial structure can be maximized, allowing the heat conductor 20 to be installed within the gaps that already exist between the pouch cells 10 while also making contact with the heat sink 30, effectively achieving heat conduction and ensuring stable heat conduction.

[0056] Referring to Figures 1 to 3, in one embodiment, at least one side of the tab seal 12 contacts the heat conductor 20 along the thickness direction D. The side surface area of ​​the tab seal 12 along the thickness direction D is relatively large. This arrangement is beneficial for increasing the contact area between the tab seal 12 and the heat conductor 20, thereby improving heat dissipation efficiency.

[0057] Referring to Figures 1 and 6, in one embodiment, multiple heat sinks 30 are provided, and the multiple heat sinks 30 are arranged at intervals along the length direction L. Multiple pouch cells 10 arranged along the thickness direction D are disposed between adjacent heat sinks 30. In other words, this allows for an increase in the number of pouch cells 10, thermally conductive elements 20, and heat sinks 30 while ensuring the heat dissipation rate, thus meeting different battery capacity requirements.

[0058] Referring to Figures 1 and 6, in one embodiment, the tab sealing edge 12 further has a first direction H, and the thickness direction D and length direction L are both perpendicular to the first direction H. The pouch cell assembly 100 also includes a heat dissipation connecting plate 50, with each heat dissipation component 30 connected to the same side of the heat dissipation connecting plate 50 along the first direction H, and the tab sealing edge 12 located along the first direction H on the side of the pouch cell 10 away from the heat dissipation connecting plate 50. In this way, each heat dissipation component 30 is connected to the heat dissipation connecting plate 50, which is beneficial to improving structural stability; with each heat dissipation component 30 connected to the same side of the heat dissipation connecting plate 50 along the first direction H, and the tab sealing edge 12 located along the first direction H on the side of the pouch cell 10 away from the heat dissipation connecting plate 50, the heat dissipation component 30 or the heat dissipation connecting plate 50 is prevented from obstructing the electrical connection of the tab 11 at the tab sealing edge 12, and the tab 11 is prevented from being damaged by the heat dissipation component 30 or the heat dissipation connecting plate 50.

[0059] Referring to Figures 1 and 6, by way of example, all pouch cells 10 have tabs 11 on the same side. And along the first direction H, the tabs 11 of all pouch cells 10 are located on the side of the pouch cell 10 that is opposite to the heat dissipation connection plate 50.

[0060] For example, the first direction H is parallel to the vertical direction. In this embodiment, the heat dissipation part 23 is higher than the heat absorption part 22 along the first direction H.

[0061] It is understandable that the heat dissipation connection plate 50 can also be configured as a liquid cooling plate with coolant inside, which is beneficial to improving the heat dissipation efficiency of the soft-pack battery cell 10; specifically, the coolant flow channels inside each heat dissipation component 30 can be connected with the coolant flow channels inside the heat dissipation connection plate 50.

[0062] For example, this application also provides a battery pack including the aforementioned pouch cell assembly 100. The battery pack provided by this application, with the same volume, has higher heat dissipation efficiency, better stability, safety, and longer service life.

[0063] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A soft-pack battery cell assembly, characterized by, The soft package battery cell (10), the heat conducting member (20) and the heat radiating member (30); the soft package battery cell (10) comprises a tab seal (12), the heat conducting member (20) contacts the tab seal (12), and the heat conducting member (20) also contacts the heat radiating member (30) for transmitting heat at the tab seal (12) to the heat radiating member (30).

2. The pouch cell assembly of claim 1, wherein, The contact between the tab seal (12) and the heat conducting member (20) is coated with a heat conducting material; and / or, the contact between the heat conducting member (20) and the heat radiating member (30) is coated with a heat conducting material.

3. The soft-pack battery cell assembly of claim 1, wherein, The heat radiating member (30) is a liquid cooling plate with cooling liquid inside.

4. The pouch cell assembly of claim 1, wherein, The heat conducting member (20) comprises a heat conducting pipe (21) and a phase change heat conducting material, and the phase change heat conducting material is accommodated in the heat conducting pipe (21).

5. The soft-pack battery cell assembly of claim 4, wherein, The heat conducting member (20) further comprises a liquid transferring member accommodated in the heat conducting pipe (21) for transferring liquid phase phase change heat conducting material.

6. The pouch cell assembly of claim 1, wherein, The heat conducting member (20) comprises a heat absorbing part (22) and a heat radiating part (23) connected with each other, the heat absorbing part (22) is used for contacting the tab seal (12), and the heat radiating part (23) is used for contacting the heat radiating member (30).

7. The pouch cell assembly of claim 6, wherein, The heat radiating part (23) is higher than the heat absorbing part (22).

8. The soft-pack battery cell assembly of claim 6, wherein, The tab seal (12) has a thickness direction (D) and a length direction (L); along the thickness direction (D), the heat conducting member (20) comprises a first branch (21A) and a second branch (21B) arranged in sequence; the first branch (21A) and the second branch (21B) both comprise the heat absorbing part (22); along the length direction (L), the first branch (21A) and the second branch (21B) are communicated at at least one side of the soft package battery cell (10), and the communication part of the first branch (21A) and the second branch (21B) is configured as the heat radiating part (23).

9. The pouch cell assembly of claim 8, wherein, The second branch (21B) comprises a first sub-branch (21B1) and a second sub-branch (21B2); along the length direction (L), the first sub-branch (21B1) and the second sub-branch (21B2) are respectively connected to two ends of the first branch (21A).

10. The pouch cell assembly of claim 8, wherein, Along the thickness direction (D), two soft package battery cells (10) arranged side by side form a soft package battery cell group (101), and the soft package battery cell assembly (100) comprises at least one soft package battery cell group (101) arranged in sequence along the thickness direction (D); the soft package battery cell group (101) is provided in one-to-one correspondence with the heat conducting member (20), and the first branch (21A) and the second branch (21B) of each heat conducting member (20) are respectively located at two sides opposite to the corresponding soft package battery cell group (101).

11. The soft-pack battery cell assembly of claim 10, wherein, The soft package battery cell assembly (100) further comprises an elastic member (40), and the elastic member (40) is clamped between two soft package battery cells (10) of the soft package battery cell group (101) and located at the tab seal (12).

12. The pouch cell assembly of claim 1, wherein, The tab sealing edge (12) has a thickness direction (D) and a length direction (L); along the length direction (L), the heat dissipation piece (30) is arranged on one side of the soft package battery core (10), and the heat dissipation piece (30) contacts the heat conduction piece (20), and / or, along the thickness direction (D), at least one side of the tab sealing edge (12) contacts the heat conduction piece (20).

13. The pouch cell assembly of claim 12, wherein, The heat dissipation piece (30) is arranged in multiple, and multiple heat dissipation pieces (30) are arranged at intervals along the length direction (L), and multiple soft package battery cores (10) arranged along the thickness direction (D) are arranged between adjacent heat dissipation pieces (30).

14. The pouch cell assembly of claim 13, wherein, The tab sealing edge (12) also has a first direction (H), and the thickness direction (D) and the length direction (L) are both perpendicular to the first direction (H); the soft package battery core assembly (100) further comprises a heat dissipation connecting plate (50), each heat dissipation piece (30) is connected to the same side of the heat dissipation connecting plate (50) along the first direction (H), and the tab sealing edge (12) is located on the side of the soft package battery core (10) away from the heat dissipation connecting plate (50) along the first direction (H).

15. A battery pack, characterized by The soft package battery core assembly (100) comprises any one of claims 1-14.

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