Battery device with cell tab cooling system

Abstract

A battery device (10) includes a pouch cell (12), which includes a cell body (18), a first pole tab (20) and a second pole tab (22), which is suitable for providing an electrical connection to the cell body (18), and a cell pole tab cooling system (16) configured to manage the temperature of the cell pole tabs, wherein the cell pole tab cooling system (16) is in surface contact with the first pole tab (20) and / or the second pole tab (22), and the cell pole tab cooling system (16) includes a thermally conductive plate (24) made of a high thermal conductivity material.

Description

Technical Field

[0001] The present disclosure relates generally to the field of methods and assemblies for thermal management of temperature of battery components and thermal safety features. More specifically, the present invention relates to a battery device for thermal management of a battery pack, module or subassembly. Background Art

[0002] In this application, the "thermal management" function and goal shall mean keeping the battery and its various subcomponents within the desired temperature limits (minimum and maximum values) and within the desired variation (ΔT) band from one subcomponent to another. The "thermal safety" function shall mean limiting the heat propagation between battery subcomponents (especially battery cells) with the goal of preventing thermal runaway events.

[0003] In this context, the terms "battery cell", "battery module", "battery portion" and "battery pack" (and also "cell", "module", "portion" and "pack") are used to describe components of the entire battery assembly or battery device at different levels. For example, many individual battery cells form the building blocks of a battery module. Multiple battery modules (in combination with auxiliary equipment) in turn constitute a battery pack.

[0004] More specifically, in the automotive industry, lithium-ion battery cells are used to form automotive battery packs. Battery packs typically include a large number of battery pouch cells, sometimes hundreds or even thousands, to meet the desired power and capacity requirements. Each battery pouch cell may also contain multiple battery stacks (i.e., anodes, cathodes, and separators) and electrode leads (also referred to as cell tabs in this application). Several cells are typically connected together by cell tabs and busbars (i.e., interconnected cells) to form modules. A typical battery pack may then include dozens of such modules. A battery system may include one or more battery packs sized to provide power to a vehicle.

[0005] One of the important issues in the construction of electric vehicles is the thermal management of the battery and the thermal safety system. Thermal management is essential for the performance and operating life of electric vehicle batteries, and several studies, publications and patent documents deal with this issue.

[0006] For example, it is known to use cooling fins to conduct heat from battery cells or battery pouch cells. The cooling fins may be made of a material with high thermal conductivity (or low thermal resistance) to transfer heat to a cooler or heat exchanger. The cooling fins extend between two main cells and are mostly in contact with the main face of the cell. For example, EP22176073.9 from the applicant discloses such a fin extending between two battery cells.

[0007] It is also known to cool electric vehicle batteries by using forced convection of forced air or liquid coolant circulating through cooling channels. For example, documents US2021135307A1, US2014308551A1, and US2008305388A1 disclose a liquid-cooled battery system. US2016204483A1 also discloses cooling fins configured to receive a flow of liquid coolant through a coolant channel, and discloses inter-cell thermal insulation within a battery system using passive cooling, such as conduction, radiation, or convection cooling without active circulation of a cooling fluid.

[0008] However, such cooling fins only cool the body of the cell, and there is a need to further cool other parts of the battery and / or provide an alternative to these cooling fins.

[0009] For this purpose, cooling unit tabs are also known. For example, WO2022051642A1 discloses a battery pack cooling system having a bag-type unit, the bag-type unit comprising a first tab and a second tab and a tap enclosure configured to contain a cooling material. The cooling material comprises a liquid that immerses at least one of the first tab and the second tab. This arrangement is complex to install and maintain, and has the risk of leakage. Summary of the invention

[0010] An object of the present invention is to provide a battery device which is easy to assemble and maintain and provides reliable thermal safety.

[0011] The invention relates to a battery arrangement according to claim 1 .

[0012] Thermal conductivity is a material property and describes the ability of a given material to conduct heat. Materials with high thermal conductivity are better conductors of heat. This property is independent of the size, shape, or orientation of the material in a homogeneous material, and therefore, thermal conductivity is an ideal value. Thermal conductivity is measured in Watts per meter Kelvin. For example, a high thermal conductivity material is a material with a thermal conductivity in the range of 100 W·m-1·K-1 to 3000 W·m-1·K-1.

[0013] In one embodiment, the heat conducting plate is made of graphite or copper, which are materials with high thermal conductivity.

[0014] In one embodiment, the unit tab cooling system comprises an outer layer made of an electrically insulating material, and wherein the outer layer surrounds the heat conducting plate. The outer layer is, for example, a flexible plastic coating.

[0015] In one embodiment, glue is arranged between the cell tab and the heat conducting plate. In one embodiment, glue is arranged between the outer layer and the heat conducting plate. The glue may also have thermal and / or electrical insulation properties.

[0016] In one embodiment, the outer layer has a thickness between 10 microns and 100 microns. Known battery tabs have a thickness between 0.010 mm and 0.150 mm. Therefore, the unit tab cooling system should not increase the overall thickness of the tab and should not increase the weight of the battery system.

[0017] In one embodiment, the thermally conductive plate has a thickness between 10 micrometers and 1 mm.

[0018] In one embodiment, the first pole tab and / or the second pole tab extend along a pole tab length, and wherein a length of the heat conducting plate is equal to or less than a length of the first pole tab and / or the second pole tab.

[0019] In one embodiment, the unit tab cooling system is integrated with the cooling fins.

[0020] In one embodiment, the unit tab cooling system contacts the cooling fins.

[0021] In one embodiment, the first pole tab and / or the second pole tab extend along a pole tab length, and wherein a length of the unit pole tab cooling system and / or a length of the conductive plate is longer than a length of the first pole tab and / or the second pole tab.

[0022] In one embodiment, the cell tab cooling system extends from the cell body to a housing, and wherein the first tab and / or the second tab is at a non-zero distance from the housing.

[0023] In one embodiment, the housing includes a cooling plate, and the unit tab cooling system is directly or indirectly connected to the cooling plate. Specifically, the unit tab cooling system can directly contact the cooling plate so that the heat conducting plate touches the cooling plate, or be indirectly connected to the cooling plate so that a portion extends between the heat conducting plate and the cooling plate, and the plate is suitable for transferring heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Specific embodiments of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0025] Figure 1is a perspective view of an exemplary battery device according to the present invention, the battery device having two battery pouch cells in a first arrangement, a cooling fin extending between the two pouch cells, and a cell tab cooling system according to a first embodiment, each battery pouch cell having two cell tabs;

[0026] Figure 2A Shows Figure 1 A schematic cross-sectional view of a battery device;

[0027] Figure 2B A schematic cross-sectional view of a battery device according to the present invention is shown, the battery device having two cell pouches and a cell tab cooling system in a second arrangement according to the first embodiment, wherein the two cell pouches have cell tabs arranged on the same side of the cell pouch body;

[0028] Figure 3A A schematic cross-sectional view of a battery device according to the present invention is shown, the battery device having a cell bag including a cell tab and a cell tab cooling system according to a second embodiment;

[0029] Figure 3B A schematic cross-sectional view of a battery device according to the present invention is shown, the battery device having two cell pouches including cell tabs and a cell tab cooling system according to a third embodiment;

[0030] Figure 4 A schematic cross-sectional view of a battery device according to the present invention is shown, the battery device having two cell pouches and a cell tab cooling system according to a fourth embodiment, wherein the two cell pouches have cell tabs arranged on both sides of the cell pouch body;

[0031] Figure 5A In more detail, the Figure 1 , Figure 2A and Figure 2B A schematic diagram of a conductive plate and an outer layer of a unit tab cooling system of an embodiment;

[0032] Figure 5B In more detail, a method suitable for use in Figure 3A , Figure 3B and Figure 4 Schematic diagram of the conductive plate and outer layer of the unit tab cooling system in an embodiment.

[0033] The same reference numbers in different drawings identify the same or similar elements. DETAILED DESCRIPTION

[0034] Figure 1A battery device 10 is shown that includes a first pouch cell 12, a second pouch cell 14, and a cell tab cooling system 16. The first pouch cell 12 and the second pouch cell 14 are the same or similar. The pouch cells 12, 14 include a cell body 18, a first tab 20, and a second tab 22. For example, the first tab 20 is an anode tab and the second tab 22 is a cathode tab. The first tab 20, the second tab 22 are connected to internal components of the cell body 18 and are away from the cell body 18 to allow energy of the cell to be transferred to an external source. For a given pouch cell 12, 14, one tab may correspond to the positive terminal of the pouch cell and the other tab may correspond to the negative terminal of the pouch cell. Figure 1 In the exemplary embodiment depicted in FIG. 1 , the battery device 10 has two pouch cells, however, the battery device 10 may also have only one pouch cell without departing from the scope of the present disclosure. In another embodiment, the battery device may have multiple pouch cells without departing from the scope of the present disclosure. In addition, the pouch cells may be similar, identical, or different.

[0035] Each pouch cell 12, 14 may include any battery or cell structure having tabs connected to the cell body and the internal components of the pouch cell. The pouch cell may have any suitable battery chemistry. For example, the pouch cell may be a lithium-ion cell, such as lithium cobalt oxide, lithium manganese oxide, lithium nickel manganese cobalt oxide, lithium iron phosphate, lithium nickel cobalt aluminum oxide, lithium titanate, other lithium-based battery chemistry or other battery chemistry.

[0036] Each cell tab 20, 22 is a thin, flat and long sheet-like electrode. In a known manner, the cell tabs are mainly made of copper or nickel-plated copper for the anode (positive electrode) and aluminum for the cathode (negative electrode).

[0037] The battery device 10 includes a cell tab cooling system 16 configured to manage the temperature of the cell tabs 20, 22. The cell tab cooling system 16 is in surface contact with the first tab 20 and / or the second tab 22. For example, the cell tab cooling system 16 includes a thermally conductive plate 24 made of a high thermal conductivity material.

[0038] For example, the high thermal conductivity material is a material with a thermal conductivity in the range of 100 W·m-1·K-1 to 3000 W·m-1·K-1. The heat conducting plate 24 is made of graphite or copper. The heat conducting plate is suitable for conducting heat from the unit tab to the external environment.

[0039] The unit tab cooling system 16, more specifically the heat conducting plate 24, is adapted to the shape of the unit tabs 20, 22. As previously mentioned, the unit tabs 20, 22 are thin, flat and long sheet electrodes and may have a rectangular shape, for example. The heat conducting plate 24 has a substantially identical shape and extends along the unit tabs 20, 22.

[0040] For each cell tab 20, 22, a heat conducting plate 24 extends along the cell tab 20, 22. The heat conducting plate 24 is, for example, covered by an outer layer 26. The outer layer 26 is, for example, a thin layer of electrically insulating material. Glue may be provided between the outer layer and the heat conducting plate. Glue may also be arranged between the cell tab 20, 22 and the conduction plate 24 (so that the outer layer does not contact the cell tab 20, 22). The outer layer 26 may completely or only partially cover the heat conducting plate 24. For example, the outer layer may be provided only on the face of the heat conducting plate 24 opposite to the face facing the cell tab 20, 22.

[0041] Figure 2A Shows Figure 1 A cross section of a battery device. As can be seen, each pouch cell 12, 14 includes a cell body 18 and two cell tabs 20, 22. The cell body is clearly a rectangle with long and short sides, and the first cell tab 20 extends from one side of the battery body, while the second cell tab 22 extends from the opposite side of the cell body. The pouch cells are arranged close to each other. More particularly, for a parallelepiped cell body, the wider faces of the pouch cells may extend parallel or substantially parallel to each other. In a known manner, cooling fins 28 extend between the two pouch cells 20, 22 to dissipate heat from the wide faces of the battery. For each of the four cell tabs (each pouch cell includes two cell tabs), a heat conducting plate 24 is provided along the cell tab. Thus, Figure 1 and Figure 2A The unit tab cooling system 16 of the embodiment includes four (4) thermally conductive plates 24 .

[0042] As previously mentioned, each thermally conductive plate 24 may have an outer layer 26 made of an electrical insulator material.

[0043] exist Figure 1 and Figure 2AIn the embodiment of the present invention, the unit tab cooling system 16 also ensures the function of the cooling fin. More particularly, each heat conducting plate 24 is integrated with a cooling fin. For example, the heat conducting plate extends along the unit tab and along the unit body. More particularly, each unit tab 20, 22 is associated with a heat conducting plate 24 and also constitutes a cooling fin. Therefore, the first unit tab 20 of the first bag-type unit 12 is in surface contact with the first heat conducting plate 24 (as described above, it is finally coated with an electrical insulation layer). The first heat conducting plate 24 includes a first portion 241 (e.g., a first flat portion) extending along the first unit tab 20 and a second portion 242 (e.g., a second flat portion) extending along the wide face of the unit body of the first unit bag. The first portion 241 and the second portion 242 are finally connected by a third portion 243. The third portion 243 can extend obviously orthogonally to the first portion 241 and the second portion 242. In a similar manner, the second heat conductive plate 24 (finally coated with an electrical insulating layer as described above) includes a first portion 241 (e.g., a first flat portion) extending along the second unit tab 22 of the first bag-type unit 12 and a second portion 242 (e.g., a second flat portion) extending along the wide face of the unit body of the first bag-type unit 12. The second portions 242 of the first and second heat conductive plates 24 do not extend on the same side of the unit body 18, so that both wide faces of the unit body 18 are in contact with the heat conductive plate 24.

[0044] The first portion of the heat conductive plate 24 has a first length Lp1. The first length Lp1 may be the same as the length Lt of the cell tabs 20, 22, or may be shorter or longer, as better described below. The second portion of the heat conductive plate 24 has a second length Lp2.

[0045] In the same manner, for the second bag-type unit 14, the third heat-conducting plate 24 includes a first portion 241 (e.g., a first flat portion) extending along the first unit tab 20 and a second portion 242 (e.g., a second flat portion) extending along the wide face of the unit body 18 of the second bag-type unit 14. The fourth heat-conducting plate 24 (finally coated with an electrical insulating layer as described above) includes a first portion 241 (e.g., a first flat portion) extending along the second unit tab 22 of the second bag-type unit 14 and a second portion 242 (e.g., a second flat portion) extending along the wide face of the unit body of the second bag-type unit 14.

[0046] The second portions 242 of the second and fourth heat conducting plates 24 may, for example, extend between the first bag unit 12 and the second bag unit 14 so that they face each other on one side and face the first bag unit or the second bag unit on the other side.

[0047] Figure 2AThe embodiment depicts two pouch cells. However, in other embodiments, multiple pouch cells may be stacked side by side to form a module or group or battery subassembly (or only one pouch cell may be provided). In another embodiment, the battery device 10 may include only one pouch cell and one thermally conductive plate.

[0048] Figure 2B Shown with Figure 2A The battery device 10 is similar to the battery device 10, except that the cell tabs are not as Figure 2A are shown arranged on opposite sides of the unit body, but Figure 2B The unit tabs are arranged on the same side of the unit body. Figure 2B The unit tabs 20 and 22 do not contact each other. A gap is set between the first unit tab 20 and the second unit tab 22. Figure 2B As shown, the heat conducting plates extend along the unit tabs and along the unit body. More particularly, each unit tab 20, 22 is associated with a heat conducting plate 24, also constituting a cooling fin.

[0049] Figure 3A A battery device 10 including a pouch cell 12 and a cell tab cooling system 16 is shown, the pouch cell 12 having a first cell tab 20 and a second cell tab 22. The cell tab cooling system 16 includes a first heat conductive plate 24 having a first portion extending along the first cell tab 20. The first length Lp1 of the heat conductive plate is, for example, greater than the length Lt of the first cell tab 20. The cell tab cooling system 16 also includes a second heat conductive plate 24 having a first portion 241 extending along the second cell tab. In one embodiment, only one of the two tabs may be provided with a heat conductive plate. The first length Lp1 of the second heat conductive plate is, for example, greater than the length Lt of the second cell tab. The cell tab cooling system 16 also includes a cooling plate or cooler 30. The cooler 30 may be significantly flat and may include several layers (not shown). The first layer may be, for example, a heat pad, the second layer may be a first cooling plate, the third layer may be a fluid channel for conveying a coolant, and the last layer may be a second cooling plate. The first heat conductive plate may have a second portion in contact with the cooling plate surface. Thus, the heat conducting plate 24 is adapted to transfer the heat of the first cell tab 12 with which it contacts to the cooler 30. The cooler 30 may also be formed by the housing of the battery subassembly (battery module, battery pack or battery cell).

[0050] exist Figure 3B In the embodiment, the battery device includes two pouch cells 12, 14 adjacent to each other. Each pouch cell 12, 14 includes two cell tabs 20, 22. Figure 3B As shown, each of the cell tabs is arranged on one side of the cell body. Figure 2BAs shown, the cell tabs may be arranged on the same side of the cell body. The cell tab cooling system 16 includes first, second, third and fourth heat conductive plates 24. The first heat conductive plate 24 extends from the first cell body 18 along the first cell tab 20 and beyond the first cell tab until it reaches the cooler 30. A gap is arranged between the free end of the cell tab 20 and the cooler 30. In the same manner, the second heat conductive plate 24 extends from the first cell body 18 along the second cell tab 22 and beyond the second cell tab 22 until it reaches the cooler 30. The third heat conductive plate 24 extends from the second cell body along the third cell tab and beyond the third cell tab until it reaches the cooler 30. The fourth heat conductive plate 24 extends from the second cell body 18 along the fourth cell tab 22 and beyond the fourth cell tab until it reaches the cooler 30. The battery device may have several coolers 30, so that a cooler is assigned to each heat conductive plate, or the battery device may have only one cooler 30. For example, Figure 3B Two coolers 30 are shown. The first cooler 30 is in contact with the first and third heat conducting plates 24. The second cooler is in contact with the second and fourth heat conducting plates 24. The first and second coolers may be arranged such that the baggies 12, 14 extend between the first and second coolers 30 without contacting them.

[0051] Each heat conducting plate has an L-shape, with a first portion 241 extending along (and beyond) the cell tabs 20, 22 and a second portion 242 in surface contact with the cooler 30. For example, the first portion 241 and the second portion 242 may be orthogonal to each other.

[0052] exist Figure 3B In the embodiment, cooling fins (not shown) or air gaps may be provided between the first and second unit bodies 18. The cooling fins may also be provided by one or more heat conducting plates (such as those shown in FIG. Figure 2A and Figure 2B The heat conducting plate) is formed.

[0053] Figure 4Another embodiment of the present invention is shown. In this embodiment, the unit tab cooling system 16 is not integrated with the cooling fins, but is connected to the cooling fins. More specifically, the unit tab cooling system 16 and the heat conducting plate 24 touch or contact the cooling fins 28. The cooling fins disclosed in EP22176073.9 of the present applicant can be arranged between two bag-type units 12, 14. For example, the thermal / cooling fin 28 may include a support unit sandwiched between a first contact unit and a second contact unit, the support unit being suitable for establishing an insulating gap (e.g., an air gap) between the first contact unit and the second contact unit, wherein the first contact unit and the second contact unit are in contact with the unit body surface. The contact unit is made of a first material. The support unit is made of a second material different from the first material. More specifically, the first material has a high thermal conductivity, wherein the second material has a low thermal conductivity. The first material may be the same as the material of the unit tab cooling system. The first material is, for example, graphite or copper. The second material may be a paper-based material or a mica-based material. For example, the support unit may include a plurality of spacers arranged on both sides of the support plate. Figure 4 The cooling fins 28 of the bag cells 12 and 14 may have another structure. The heat / cooling fins 28 are capable of cooling the unit body 18, wherein the unit tab cooling system 16 provides cooling for the unit tabs 20 and 22. The unit tab cooling system 16 includes a heat conducting plate 24. For example, the heat conducting plate 24 is L-shaped. The first portion 241 extends along the unit tabs 20 and 22, wherein the second portion 242 extends along one side of the bag cells 12 and 14 until it contacts the cooling / heat fins. Figure 4 The illustrated embodiment shows a battery device 10 with two pouch cells 12, 14. A heat or cooling fin 28 extends between the pouch cells, which is in surface contact with the cell body 18. Two other cooling / heat fins 28 are also arranged around the pouch cell 12 so that the wide face of the pouch cell is in surface contact with one heat / cooling fin 28. The heat conducting plate 24 of the first cell tab 20 can, for example, contact the heat / cooling fins arranged outside the pouch cell. More particularly, the second portion 242 contacts the heat / cooling fins arranged outside the pouch cell. The heat conducting plate 24 of the second cell tab 22 can, for example, contact the heat / cooling fins arranged between the pouch cells. More particularly, the second portion 242 contacts the heat / cooling fins arranged between the pouch cells.

[0054] Thus, a thermally conductive plate is associated with each heating / cooling fin 28 .

[0055] Figure 5A and Figure 5B The thermally conductive plate having an outer layer or electrical insulator layer is shown in more detail.

[0056] Figure 5A Shown as Figure 1 , Figure 2A and Figure 2B An embodiment of the heat conducting plate 24 is particularly shown in FIG.

[0057] As described above, the heat conducting plate 24 includes a first portion 241 having a first length Lp1 and adapted to extend along the cell tabs 20, 22. The heat conducting plate 24 also includes a second portion 242 having a second length Lp2 and adapted to extend along the wide face of the cell body. For example, the second length Lp2 is greater than the first length Lp1. The first portion 241 and the second portion 242 may be connected together by a third portion 243, which may extend longitudinally perpendicular to the first portion 241 and the second portion 242. The first length Lp1 of the first portion 241 clearly corresponds to the length Lt of the cell tab, wherein the second length Lp2 of the second portion 242 clearly corresponds to the length of the cell body. The heat conducting plate 24 is, for example, graphite or copper, and may be provided with an outer layer 26, which is an electrical insulator layer surrounding the graphite or copper material. Glue may be arranged between the outer layer 26 and the heat conducting plate 24.

[0058] Figure 5B Shown as Figure 3A , Figure 3B or Figure 4 The battery device 10 shown in FIG. 1 specifically shows an embodiment of a heat conducting plate 24. The heat conducting plate 24 includes a first portion 241 adapted to extend along the cell tabs 20, 22 and a first portion 242 adapted to extend along the cooler (eg, Figure 3A or Figure 3B ) or a second portion 242 extending along a thin surface of the main battery, so as to subsequently contact a cooling fin or a thermal fin (such as Figure 4 ). The heat conducting plate 24 is, for example, graphite or copper and may be provided with an outer layer 26, which is an electrical insulator layer surrounding the graphite or copper material. Glue may be arranged between the outer layer 26 and the heat conducting plate 24.

[0059] For example, in Figure 5A and Figure 5B In an embodiment of the present invention, the heat conducting plate 24 may have a thickness t between 10 microns and 1 mm. The heat conducting plate may be flexible. Therefore, its shape may be adapted to the shape of the cell tabs and / or the pocket cell. The electrical insulator layer (also referred to as the outer layer 26) may have a thickness between 10 microns and 100 microns.

[0060] Thus, the cell tab cooling system 16 is easy to manufacture and transfers heat from the cell tabs to the top or bottom of the battery subassembly, or to the thermal fins between the pouch cells, and cools the cell tabs.

[0061] Although specific examples have been illustrated and described herein, various alternative and / or equivalent embodiments may be substituted for the specific examples shown and described without departing from the scope of the present disclosure. This application is intended to cover any modifications or variations of the specific examples discussed herein. For example, Figure 1 or Figure 2A or Figure 2B or Figure 4 The battery device may also be provided with a cooler. In the disclosed embodiments, all unit tabs are provided with heat conducting plates. However, in some embodiments, only some unit tabs may be provided with heat conducting plates without departing from the scope of the present disclosure.

Claims

1. A battery device (10), comprising: A first bag unit (12) and a second bag unit (14), each of the first bag unit (12) and the second bag unit (14) comprising: The unit body (18), a first tab (20) and a second tab (22) adapted to provide electrical connection to the cell body (18), a cooling fin (28) extending between the first bag unit (12) and the second bag unit (14) and in surface contact with the first bag unit (12) and the second bag unit (14); and A unit tab cooling system (16) is configured to transfer heat from the tabs (20, 22), wherein the unit tab cooling system (16) is in surface contact with the first tab (20) and / or the second tab (22), and the unit tab cooling system (16) comprises a heat conducting plate (24) made of a material with high thermal conductivity, And it is characterized by The cooling fin (28) is a thermal fin having a first contact unit, a second contact unit, and a support unit sandwiched between the first contact unit and the second contact unit, the support unit including a structure arranged to establish an insulating gap, and the contact unit.

2. The battery device (10) according to claim 1, wherein: The heat conducting plate (24) is made of graphite or copper.

3. The battery device (10) according to claim 1 or 2, wherein: An outer layer (26) made of an electrically insulating material surrounds the thermally conductive plate (24).

4. The battery device (10) according to claim 3, wherein: Glue is arranged between the unit tabs (20, 22) and the heat conducting plate (24).

5. The battery device (10) according to claim 3 or 4, wherein: The outer layer (26) has a thickness between 10 microns and 100 microns.

6. The battery device (10) according to any one of claims 1 to 5, wherein: The heat conducting plate (24) has a thickness between 10 micrometers and 1 mm.

7. The battery device (10) according to any one of claims 1 to 6, wherein: The unit tab cooling system (16) is integrated with the cooling fins (28).

8. The battery device (10) according to any one of claims 1 to 6, wherein: The unit tab cooling system (16) contacts the cooling fins (28).

9. The battery device (10) according to any one of claims 1 to 8, wherein: The first pole tab (20) and / or the second pole tab (22) extend along a pole tab length (Lt), and wherein a length of a first portion (241) of the conductive plate (24) extending along the first pole tab (20) and / or the second pole tab (22) is equal to or less than the length of the first pole tab and / or the second pole tab.

10. The battery device (10) according to any one of claims 1 to 8, wherein: The first pole tab and / or the second pole tab extend along a pole tab length, and wherein a first portion (241) of the conductive plate (24) extending along the first pole tab (20) and / or the second pole tab (22) has a length longer than the first pole tab (20) and / or the second pole tab (22).

11. The battery device (10) according to claim 10, wherein: The cell tab cooling system (16) extends from the cell body (18) to a housing, and wherein the first tab (20) and / or the second tab (22) are at a non-zero distance from the housing.

12. The battery device (10) according to claim 11, wherein: The housing includes a cooler (30), and the unit tab cooling system (16) is directly or indirectly connected to the cooler (30).

Images