Pouch cell device

Abstract

Pouch cell device that supports the conduction of battery heat, comprising: a pouch cell assembly (400) comprising an alternating sequence of a plurality of pouch cells and a plurality of frames (410, 412), each pouch cell having a first and second heat-conducting contact edge (230, 240, 430, 440), the first and second contact edges (230, 240, 430, 440) having curved portions forming ribs (235, 245) in the contact edges (230, 240, 430, 440), and one frame (410) of the plurality of frames (410, 412) being arranged adjacent to the first cover section of one of the plurality of pouch cells, and another frame (412) of the plurality of frames (410, 412) being arranged adjacent to the second cover section of one of the plurality of pouch cells; a first and second heat sink (460, 470) which have a convex shape, so that the distance to the connection of the respective first and second contact edge (230, 240, 430, 440) of each pouch cell and of the respective first and second heat sink (460, 470) decreases; wherein the first contact edge (430) of each of the plurality of pouch cells is positioned proximal to the first heat sink (460) and the second contact edge (440) of each of the plurality of pouch cells is positioned proximal to the second heat sink (470) opposite the first contact edge (430); and the first heat sink (460) is connected to the first contact edge (430) of each of the plurality of pouch cells and the second heat sink (470) is connected to the second contact edge (440) of each of the plurality of pouch cells, a holding device (480) which is wrapped around the circumference of the heat sinks (460, 470), wherein the pouch cell assembly (400) is inserted between them, wherein contact points are provided with the outer surface (462) on the heat sink (460) and the outer surface (472) on the heat sink (470), wherein an insert (490) is provided between the holding device (480) and the heat sink (460, 470) in order to create contact between the holding device (480) and the outer surfaces (462, 472) of the heat sink (460, 470).

Description

[0001] The technology presented here relates to a pouch cell device that supports the conduction of battery heat.

[0002] Thermal energy (e.g., heat) can be dissipated or conducted using a pouch cell. A pouch cell is an electrode assembly containing electrode leads that connect the positive and negative terminals to the outside of a sealed, flexible housing or pouch. Pouch cells are lightweight and flexible due to the absence of a metal housing and are preferred over cylindrical cells in certain applications.

[0003] Heat transfer using pouch cells has a wide range of applications, including power grid energy storage, computer hardware, and vehicle batteries.

[0004] Attempts have been made to reduce the weight of pouch cells without altering their dissipation or conduction properties. One attempt was made to reduce the pouch cell thickness by decreasing the number of layers in the electrode assembly. While reducing the number of layers in the electrode assembly reduces the pouch cell thickness, this solution also reduces heat transfer through the pouch cell, as heat transfer through an electrode assembly is directly related to the number of electrode layers.

[0005] Additionally, this solution does not consider changing the pouch cell's cover material, so that a conductive layer that conducts heat is included, which is present as a result of reducing the number of layers in the electrode assembly.

[0006] Another technique allows for greater heat dissipation through the pouch cell when combined with a heat sink. When assembling the pouch cell with the heat sink, the requirement for thermal contact between the two is critical. Methods to ensure robust thermal contact between the pouch cell and the heat sink have included the use of thermal paste or conductive tape. Drawbacks of this technique include the unwanted additional mass of the paste or tape and the potential weakening of the thermal contact due to wear and tear of the paste / tape over time.

[0007] DE 10 2010 062 744 A1 discloses a pouch cell device comprising a cell assembly and cooling plates, wherein the cell assembly consists of pouch cells arranged in frames. The individual frames are connected to each other to form the cell assembly by cold forming in order to achieve a flat and mechanically stable contact surface against which a heat sink is located.

[0008] Further state of the art can be found in DE 10 2008 038 936 A1, DE 699 05 836 T2 and KR 10 2013 0 011 977 A.

[0009] The object of the invention is to provide a pouch cell device with which it is possible to ensure the conduction of thermal energy from pouch cells in a simple and temperature-tolerant manner, while at the same time providing the additional possibility of convection of thermal energy from pouch cells.

[0010] The problem is solved by the subject matter of claim 1. Advantageous embodiments of the invention are described in the dependent claims. Fig. Figure 1 is a perspective view of a pouch cell with an extended border according to an exemplary embodiment. Fig. Figure 2 is a front view of another pouch cell that has extended edges containing curved parts. Fig. Figure 3 is a sectional view of a different type of pouch cell. Fig. Figure 4 is a side view of a plurality of pouch cells positioned to make contact with a heat sink. Fig. Figure 5 is a perspective view of the majority of pouch cells. Fig. 4, after contact with a heat sink has been established.

[0011] While the present technology is generally described in connection with a vehicle in the form of a car, it should be noted that the technology can be implemented in connection with other vehicles, such as ships and aircraft.

[0012] While the technology is generally described in connection with vehicle batteries, its use is not limited to this application. Other uses include cooling batteries used in grid energy storage and non-vehicle computers, to name just two examples. I. Overview of the pouch cell - Fig. 1 and 2

[0013] Fig. Figure 1 is a perspective view of a pouch cell 100. The pouch cell 100 has a pouch cell cover 110 and an active pouch cell material 115 (see inset in Figure 1). Fig. 1) The pouch cell 100 also has pouch cell contact edges 120, 130 and closure edges 140, 150.

[0014] The active material 115 of the pouch cell 100 is located behind the cover material 110. The active material 115 is a conductive material configured and arranged to conduct heat from the battery—e.g., a vehicle battery—via a set of electrode leads in conjunction with the active material. More precisely, the active material 115 is a cell assembly in which a positive electrode 180, at least one separator 185 (e.g., an electrolyte), and a negative electrode 190 are stacked or wound to form the cell assembly. A positive electrode lead 160 and a negative electrode lead 170 are attached to the positive electrode 180 and the negative electrode 190, respectively, and extend from the pouch closure edge 150 to the connection with the vehicle battery.

[0015] The active material 115 is coated with a current collector 195, e.g., a thin Al or Cu plate made of aluminum, copper, or another conductive material, and is attached to the electrode leads 160, 170. It should be noted that additional configurations of electrode cell assemblies known in the art can be used according to the present technology.

[0016] The active material 115 of the pouch cell can contain any material that conducts heat, including, but not limited to, lithium cobalt oxide, lithium manganese dioxide and / or lithium iron phosphate.

[0017] The active material 115 of the pouch cell is typically contained by an outer layer. More precisely, in one embodiment, the active material 115 is contained by the cover 110 of the pouch cell 100.

[0018] In one embodiment, the cover 110 of the pouch cell 100 has a layer (or several layers) of material that is / are sealed on its side(s) – e.g., on each of the four sides of the active material 115 of the Fig. The pouch cell shown in Figure 1 is sealed. The function of the cover 110 is to protect and contain the active material 115 of the pouch cell 100. Additionally, the cover 110 of the pouch cell 100 is designed to conduct heat away from the vehicle battery. Thus, in some embodiments, the cover 110 comprises materials that possess both protective and thermally conductive properties.

[0019] To avoid unnecessarily increasing the mass of the pouch cell 100, the cover 110 is designed as a thin layer in one embodiment. For example, a single layer of pouch cell cover 110 can be between approximately 1% and approximately 5% of the total thickness of the pouch cell 100.

[0020] Further details regarding the structure and composition of the pouch cell cover are given below in conjunction with the Fig. 2 and Fig. 3 described.

[0021] In one embodiment, the contact edges 120, 130 and the sealing edges 140, 150 are created by first placing the active material 115 between layers of the pouch cell cover 110. Once the layers of the cover 110 surround the active material 115, the sections of the cover 110 that are not in contact with the active material 115 are bonded (e.g., glued) to create a seal around the active material 115. The seal created by the layers of the cover 110, in turn, forms the four edges, i.e., contact edges 120, 130 and sealing edges 140, 150. The sealing edge 150 attaches a positive electrode lead 160 and a negative electrode lead 170 to the active material 115 and secures the electrode leads 160, 170 in position.

[0022] The sealing edges 140, 150 seal the pouch cell 100 at the edges containing the active material 115. Similarly, the contact edges 120, 130 contain the active material 115 by sealing the pouch cell 100.

[0023] The contact edges 120, 130 also serve to connect the pouch cell 100 to one or more heat sinks (in the Fig. 2 and Fig. 4 shown). In the intended embodiment, the heat sinks are connected to the pouch cell 100, alternatively, additionally or by means of the contact edges 120, 130.

[0024] An appropriate connection between the contact edges 120, 130 and the heat sinks is important for the required conduction of heat from the vehicle battery to a cooling system contained in the heat sinks, which dissipate the heat transferred from the contact edges 120, 130.

[0025] To support the role of the contact edges 120, 130 in connecting the pouch cell 100 to the heat sinks, in one embodiment the contact edges 120, 130 each have a greater width than the widths of the closure edges 140, 150, particularly in embodiments where the closure edges do not have a function such as an adhesive function. More precisely, the contact edge width 125 has a greater width than the closure edge width 145.

[0026] Further details regarding the structure of the pouch cell contact edges are available in connection with Fig. 2 described.

[0027] Fig. Figure 2 is a side view of a pouch cell assembly 200. The pouch cell assembly 200 is itself part of a pouch cell assembly that is in Fig. Figure 4 shows that the pouch cell assembly 200 comprises a pouch cell 220 and pouch cell edges. In some embodiments, the pouch cell 220, in particular an active material 224 and a pouch cell cover 228, has a similar function and character to the pouch cell 100 and its components, which in conjunction with Fig. 1 are described. In other embodiments, the pouch cell 220 has additional features to increase the thermal contact between the pouch cell 220 and the heat sinks 260, 270.

[0028] Similar to the Pouch Cell Cover 110, which is in Fig. As described in Figure 1, the pouch cell cover 228 in some embodiments has material layers configured and arranged to enclose and protect an active material 224, as well as to conduct heat away from the vehicle battery. For these purposes, the cover 228 of the pouch cell 220 can comprise materials that possess both protective and thermally conductive properties. Further details regarding the composition of the cover are described in conjunction with Figure 1. Fig. 3 described.

[0029] As in Fig. As described in Figure 1, the layers of the cover 228 seal to create four edges along the circumference of the pouch cell assembly 200, specifically two contact edges and two closure edges. The pouch cell assembly 200 features contact edges 230 and 240, as well as a closure edge. The second closure edge (not shown) is located on the opposite side of the closure edge. The closure edge 235 and the second closure edge are provided to ensure that the active material 224 is contained within the layers of the cover 228. In addition to containing the active material 224, the contact edges 230 and 240 connect the pouch cell assembly 200 to a heat sink 260 and a heat sink 270, respectively, through which heat is dissipated from the pouch cell assembly 200.

[0030] The contact edges 230, 240 may have additional conductive material, such as a foil or a sealing film, to support the material layers within the cover 228. These additional conductive materials may also be used to extend the contact edge 230, 240 to a width greater than the original width.

[0031] The initial orientation of the contact edges 230, 240 before the heat sinks 260, 270 are attached lies on a linear plane parallel to the linear plane of the sealing edge. However, once the heat sinks 260, 270 are attached, the final orientation of the contact edges 230, 240 lies on a plane perpendicular to the sealing edge. This perpendicular orientation allows for substantial contact with the heat sinks 260, 270. Therefore, the width of the contact edges 230, 240 should be such as the width 125 specified in Fig. As described in Figure 1, the contact edges 230, 240 can be folded to create a right-angled orientation. For example, the contact edges 230, 240 can have a width of approximately between 1 and 100 millimeters, depending on the pouch cell structure 200.

[0032] Proper connection of the contact edges 230, 240 with the heat sinks 260, 270 is a critical objective of the pouch cell assembly 200. Options for improving the connection and thus improving the thermal contact include, but are not limited to: using frames to secure the position of the pouch cell 220; using curved parts in the contact edges 230, 240; using buffers 280, 290 in the pouch cell assembly 200; and using a thermal adhesive 295 on the heat sinks 260, 270.

[0033] In some embodiments, the pouch cell 220 is secured by frames 210 and 212. Frame 210 can be positioned adjacent to a surface created by the cover 228 being placed on one side of the pouch cell 220, and frame 212 can be positioned adjacent to a surface created by the cover 228 being placed on the opposite side of the pouch cell 220. Both frames 210 and 212 serve to securely position the pouch cell 220. In these embodiments, frame 212 also serves as the contact point between the contact edge 230 and the heat sinks 260, as well as the contact point between the contact edge 240 and the heat sink 270.

[0034] In certain embodiments, the frames 210, 212 may have a cutout in the frame form that facilitates the automatic bending of the contact edges 230, 240. Automatic bending produces an orientation of the contact edges 230, 240 that is closely related to a plane perpendicular to the linear plane of the closure edge. When the contact edges 230, 240 have an orientation close to the desired perpendicular plane, the connection with the heat sinks 260, 270 is facilitated.

[0035] Further qualities and properties of support frames, such as frames 210 and 212, are well known in engineering and will not be described in more detail below.

[0036] In some embodiments, the contact edges 230, 240 have curved portions 235 and 245, respectively. The curved portions 235 and 245 create ribs in the contact edges 230, 240. The ribs provide the contact edges 230, 240 with the ability to stretch and bend during extraction and contraction of the pouch cell assembly 200. The ability of the curved portions 235 and 245 to stretch and bend reduces the amount of stress to which the remaining portion of the contact edges 230, 240 is subjected, which can prevent reduced thermal contact over time between the contact edges 230, 240 and the heat sinks 260, 270.

[0037] In some embodiments, the pouch cell assembly 200 can have buffers 280, 290 between the frame and the contact edge. The buffers 280, 290 create uniform contact between the contact edges 230, 240 and the heat sinks 260, 270. The buffers 280, 290 improve thermal contact by increasing the contact pressure between the pouch cell assembly 200 and the heat sinks 260, 270. Since the thermal conductivity between the contact edge 230, 240 and the heat sinks 260, 270 depends on the contact pressure, a higher and more uniform contact pressure increases the heat flow through increased thermal conductivity.

[0038] The buffer 280 is positioned between the frame 212 and the contact edge 230 and improves the contact between the heat sink 260 and the contact edge 230. Similarly, the buffer 290 is positioned between the frame 212 and the contact edge 240 and creates improved contact between the heat sink 270 and the contact edge 240. The buffers 280 and 290 enable the creation of uniform contact between the contact edges 230 and 240 and their respective heat sinks 260 and 270. The buffers 280 and 290 also ensure adhesion between the contact edges 230 and 240 and their respective heat sinks 260 and 270, thus improving heat transfer from the pouch cell assembly 200 to the heat sinks 260 and 270. Contact buffers, such as buffers 280, 290, can be made from any insulating material, such as rubber, silicone and other polymers known in engineering.

[0039] In addition to the curved parts and buffers, the heat sinks 260, 270 can have a thermal adhesive 295 to improve contact with the pouch cell assembly 200. The thermal adhesive 295 is applied to the surface of the heat sinks 260, 270, which are connected to the contact edges 230, 240, e.g., contact surfaces 268 and 278, respectively. Thermal adhesives, such as thermal paste / epoxy or conductive tape, are widely used in engineering to improve contact and heat transfer between objects.

[0040] Other embodiments may include a mechanical means for fastening the contact edges 230, 240 to the heat sinks 260, 270. The mechanical means may be used for independent fastening or in conjunction with the thermal adhesive 295. The mechanical means may, but is not limited to, include clamps such as a wire form or flat spring, spacers, or push pins. II. Pouch cell composition - Fig. 3

[0041] Fig. Figure 3 is a sectional view of the cover material contained in the cover assembly 300. The cover assembly 300 has successive layers of conductive material to conduct heat, as well as protective material to shield the conductive material. The cover assembly 300 has an inner surface 360 ​​that is adjacent to an active material 115 (in the section of Figure 3). Fig. 1 shown) and an outer surface 370 that is adjacent to the atmosphere, e.g. air, between one pouch cell and the next pouch cell of an assembly with multiple pouch cells, as in Fig. 4 is described.

[0042] The cover assembly 300 has a conductive layer 320 that provides additional conduction when heat flows from the active material to the atmosphere. A first conduction occurs within the active material. When heat flows through the inner surface 360 ​​to the cover assembly 300, a second conduction occurs due to the conductive layer 320. Finally, heat is dissipated when it reaches a heat sink (in Fig. 3 (not shown) is delivered.

[0043] For maximum heat distribution, a single conductive layer is suggested, however, multiple conductive layers can be used to achieve the same rate of heat distribution.

[0044] The conductive layer 320 can have a thermal conductivity (K) of approximately 200 W / m / K to 500 W / m / K. For example, the conductive material can be, but is not limited to, aluminum (K ≈ 200 W / m / K), copper (K ​​≈ 300 W / m / K), or graphite (K ≈ 400 W / m / K). Additional material properties, such as heat capacity, thermal conductivity, and thermal expansion, can be used when selecting a conductive material.

[0045] The thickness of the 320 conductive layer is typically inversely proportional to the thermal properties of the conductive material. More precisely, as the coefficient of thermal conductivity increases, the required thickness of the 320 conductive layer decreases. Therefore, the thickness of the 320 conductive layer can vary depending on the conductive material used.

[0046] The thickness of the 320 conductive layer should be such that efficient heat conduction occurs. This heat conduction can be measured by the change in temperature (ΔT) or another quantitative factor. For example, if a ΔT of 5°C is desired, and aluminum is the conductive material, the thickness of the conductive layer can be between 30 and 50 micrometers. However, if copper is the conductive material in the same scenario, the thickness of the conductive layer may only need to be between 20 and 40 micrometers. If the desired ΔT changes for different applications, the thickness of the 320 conductive layer will also vary accordingly.

[0047] In addition to the conductive layer 320, the cover material assembly 300 has protective layers 310 and 330. The protective layers 310 and 330 are connected to each side of the conductive layer 320 by a bonding layer 340. The bonding layer 340 can be any bonding agent known in the art, such as, but not limited to, thermosetting polymers, thermoplastic material, solvent-cast adhesive, or glue. In certain embodiments, the bonding layer 340 of the protective layers 310 and 330 to the conductive layer 320 can be achieved by thermal fusion.

[0048] The protective layers 310 and 330 can be made of the same material or of different materials. Materials for protective layers 310 and 320 can include, but are not limited to, polypropylene (PP), polyvinyl chloride (PVC), high-density polyethylene (HDPE), polyamide (PA), nylon, or other similar materials.

[0049] The thickness of the protective layers 310 and 330 can depend on the material used. However, the protective layer 310 may be thicker than the protective layer 330 because the protective layer 310 is located directly adjacent to the inner surface 360, which receives heat transfer from the active material of the pouch cell.

[0050] For example, if the conductive layer 320 has a thickness of 50 micrometers, the protective layer 310 is between approximately 100 and 150 micrometers thick. Additionally, the protective layer 310 is between approximately 25 and 75 micrometers thick.

[0051] In certain embodiments, the cover material assembly 300 may include a barrier layer 350. The barrier layer 350 would serve as additional protection to prevent penetration of the pouch cell assembly. The barrier layer 350 would separate the protective layer 330 from the outer surface 370. Since the barrier layer 350 acts as a blockage, its thickness might be less than that of the conductive layer 320. The barrier layer 350 may be made of materials including, but not limited to, polyethylene terephthalate (PET) and polybutylene terephthalate (PBT). III. Pouch cell assembly - Figs. 4 and 5

[0052] Fig. Figure 4 is a side view of a pouch cell assembly 400 according to the invention, which contains several pouch cell structures. The pouch cell assembly 400 has a plurality of frames and a plurality of pouch cell structures. Within the plurality of pouch cell structures is a pouch cell structure 420, which has contact edges 430, 440. The contact edges 430, 440 are connected to heat sinks 460 and 470, respectively. Similarly, the pouch cell structure 422 has contact edges 432 and 442, which are connected to heat sinks 460 and 470, respectively. The same pouch cell structure exists for all pouch cells in the pouch cell assembly 400.

[0053] Options for improving the connection and thermal contact are similar to the options associated with Fig. 2 are discussed. These options include the use of frames; the use of curved parts (not shown, see references 235, 245 in Fig. 2) within the contact edges; the use of buffers (not shown, see references 280, 290 in Fig. 2); the use of a thermal adhesive on the heat sinks (not shown, see reference 295 in Fig. 2) Each pouch cell can be secured by frames arranged on each side of the surfaces created by the pouch cells 420, 422, etc. The frames serve to position the pouch cells and act as a contact point between the contact edges 430, 432, etc. and the heat sink 460, and between the contact edges 440, 442, etc. and the heat sink 470.

[0054] The contact edges 430, 432, etc. and 440, 442, etc. may have curved parts to allow expansion and contraction of the pouch cell assembly 200.

[0055] The buffers can be used to create uniform contact between the contact edges, e.g., 430, 440, and the heat sinks 460, 470, and would be positioned between a frame and a contact edge. It should be noted that the buffers can be used on all frames regardless of their proximity to the contact edges. For example, one buffer would be positioned between frame 410 and contact edge 430, and another buffer would be positioned between frame 410 and contact edge 440. Similarly, buffers can be positioned between frame 414 and contact edges 432, 442. Additionally, buffers can also be positioned on frame 412 to create an additional contact surface for contact edges 430, 440.

[0056] The thermal adhesive can be similar to thermal adhesive 295, which is used in conjunction with Fig. 2 is discussed. The thermal adhesive is applied to the surface of the heat sinks 460, 470, which are connected to the contact surfaces 468, 478. Thermal adhesives, such as thermal paste / epoxy or conductive tape, are used throughout engineering to improve contact and heat transfer between objects.

[0057] Some embodiments may include a mechanical means (not shown) for attaching the heat sinks 460, 470 to the pouch cell assembly 400. The mechanical means may be used for independent attachment or in conjunction with an adhesive, e.g., the thermal adhesive 295. The mechanical means may include, but is not limited to, clamps such as wire-shaped or flat springs, spacers, or push pins.

[0058] Fig. Figure 5 is a perspective view of the pouch cell assembly 400 after it has been connected to the heat sinks 460 and 470.

[0059] Options for improving the connection and thermal contact are similar to the options associated with the Fig. 2 and Fig. 4 are discussed. Additionally, as in Fig. As can be seen in Figure 5, the thermal connection can be improved by enclosing a holding device 480 around the circumference of the pouch cell assembly 400 or by creating contoured heat sinks.

[0060] The retaining device 480 can be used to enhance the connection between each of the pouch edges within the pouch cell assembly 400 and the heat sinks 460, 470. The retaining device 480 would be wrapped around the circumference of the heat sinks 460, 470, with the pouch cell assembly 400 positioned between them, creating contact points with the outer surface 462 on the heat sink 460 and the outer surface 472 on the heat sink 470. The retaining device 480 can be any non-conductive material used to secure the entire pouch cell assembly 400, including, but not limited to, tapes, straps, and ropes.

[0061] The contoured heat sink would have a convex surface to improve thermal contact during the fastening of the heat sinks 460, 470 to the contact edges 430, 440. The convex part would be located along the contact surfaces 468 and 478.

[0062] In other embodiments, the outer surfaces 462, 472 can also be contoured in embodiments that include a retaining device 480. Embodiments with a contoured heat sink can also include an insert 490 to create contact between the retaining device 480 and the outer surfaces 462 and 472 of the heat sink. The contoured heat sink would secure the contact surfaces 468, 478 on each of the contact edges contained in the pouch cell assembly 400.

Claims

[1] Pouch cell device which assists in conducting battery heat, comprising: a pouch cell assembly (400) comprising an alternating sequence of a plurality of pouch cells and a plurality of frames (410, 412), each pouch cell having a first and second heat-conducting contact edge (230, 240, 430, 440), the first and second contact edges (230, 240, 430, 440) having curved portions forming ribs (235, 245) in the contact edges (230, 240, 430, 440), and one frame (410) of the plurality of frames (410, 412) being arranged adjacent to the first cover section of one of the plurality of pouch cells, and another frame (412) of the plurality of frames (410, 412) being arranged adjacent to the second cover section of one of the plurality of pouch cells; a first and second heat sink (460, 470) which have a convex shape, so that the distance to the connection of the respective first and second contact edge (230, 240, 430, 440) of each pouch cell and of the respective first and second heat sink (460, 470) decreases; wherein the first contact edge (430) of each of the plurality of pouch cells is positioned proximal to the first heat sink (460) and the second contact edge (440) of each of the plurality of pouch cells is positioned proximal to the second heat sink (470) opposite the first contact edge (430); and the first heat sink (460) is connected to the first contact edge (430) of each of the plurality of pouch cells and the second heat sink (470) is connected to the second contact edge (440) of each of the plurality of pouch cells, a holding device (480) which is wrapped around the circumference of the heat sinks (460, 470), wherein the pouch cell assembly (400) is inserted between them, wherein contact points are provided with the outer surface (462) on the heat sink (460) and the outer surface (472) on the heat sink (470), wherein an insert (490) is provided between the holding device (480) and the heat sink (460, 470) in order to create contact between the holding device (480) and the outer surfaces (462, 472) of the heat sink (460, 470). [2] Pouch cell device according to claim 1, wherein a buffer is provided between frame (410, 412) and contact edge (430, 440) to provide a uniform contact between contact edge (230, 240, 430, 440) and heat sink (460, 470). [3] Pouch cell device according to claim 1, wherein the heat sinks (460, 470) have a thermal adhesive (295) to improve contact with the pouch cell assembly (200), wherein the thermal adhesive (295) is applied to contact surfaces (468, 478) of the heat sinks (460, 470) that are in contact with the contact edges (230, 240, 430, 440).

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