Optimized temperature regulation battery

Abstract

To provide a battery capable of providing electrical energy for operating an electric traction motor of a motor vehicle.SOLUTION: A battery 1 includes a stack 4 arranged in a casing 3. First electrodes and second electrodes are arranged alternately in the stack with the interposition of a separator. The first electrodes are electrically connected to a first battery terminal 12a integrated into a cover, and the second electrodes are electrically connected to a second battery terminal 12b integrated into the cover. Substrates of the first electrodes and / or the second electrodes form a transverse projection 9a on at least one side of at least one associated active material layer 8. Transverse projections 9a of the substrates 7 of the first electrodes and / or the transverse projections 9a of the substrates 7 of the second electrodes 5b are connected to a conductive element 10 with thermal conductivity. At least one of the conductive elements 10 contacts the cover and / or forms a section of the cover.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a battery, in particular a battery configured as a traction battery of a motor vehicle, by means of which electrical energy can be supplied for operating an electric traction motor of the motor vehicle.

[0002] A battery is an electrochemical-based storage device for electrical energy, during which the stored chemical energy is converted into electrical energy by electrochemical redox reactions when discharged. In the context of the present invention, a battery is understood to be both a so-called primary battery, which is designed for only one discharge and not for recharging, and also a so-called secondary battery or accumulator, which is designed for multiple charging and correspondingly designed. The charging of a secondary battery is the electrolytic reversal of electrochemical redox reactions that takes place during discharge, which is realized by the application of a voltage.

[0003] A battery includes one or, generally, several battery elements, which are generally arranged in a cover in the form of a film cover or casing, often referred to as a "pouch". The battery elements each include two electrodes, a separator arranged between the electrodes to electrically separate the electrodes, and an electrolyte used as an ion conductor. The two electrodes of the battery elements each include different active materials, so that one electrode acts as an anode and the other electrode acts as a cathode (respectively with respect to the discharge of the battery cell). Furthermore, the battery generally includes two battery poles, which are incorporated in the cover and conductively connected to the electrodes inside the cover. Here, all electrodes acting as anodes can be connected to one battery pole, and all electrodes acting as cathodes can be connected to the other battery pole.

[0004] A battery configuration with a casing may have the advantage of increasing the structural load-bearing capacity of the battery compared to a battery with a film cover.

[0005] Batteries, and in particular lithium-ion batteries, which are currently mainly used as traction batteries in motor vehicles, must be stored and in particular operated, i.e. charged and discharged, in a defined temperature range in order to avoid power loss, damage and / or accelerated aging. Exceeding this temperature range is not necessarily due only to temperature equalization with a correspondingly high ambient temperature, but rather when charging or discharging the battery, the battery generates a large amount of waste heat, which leads to its own heating. It can therefore be effective to temperature-condition the battery in order to avoid falling below or exceeding this temperature range. In the case of a traction battery in a motor vehicle, such temperature regulation is usually carried out by integrating the traction battery into the cooling system of the motor vehicle, which allows thermal energy to be transferred to or removed from the traction battery via a temperature-regulating fluid. In this case, generally the covers or casings of the individual batteries or battery modules, which are interconnected in a so-called battery stack to form the traction battery, are temperature-conditioned. However, within the cover, generally a number of individual battery cells are arranged in a stack. It can be concluded from this that temperature regulation through the cover is more effective for elements of the stack that are relatively close to the cover, and that the temperature regulation effect is significantly weakened towards the center within the cover.

[0006] US Patent No. 6,858,344 discloses a battery with a parallelepiped-shaped plastic casing, in whose larger faces a metal sheet is embedded, each of which has a contact portion protruding from the casing and intended for contact with a cooling element through which a coolant flows. By incorporating the metal sheet into the casing, it is intended to achieve better heat conduction through the casing.

[0007] US Pat. No. 10,686,170 describes a device for stacking batteries, the casing of which is provided with a film cover, the film cover being connected on at least two sides to respective frame-shaped retaining elements which are intended to ensure that the stacked batteries are received securely in the casing.

[0008] U.S. Pat. No. 6,709,783 discloses a battery stack having a number of stacked batteries, with cooling elements disposed between the batteries to form a number of cooling passages for a cooling medium to flow therethrough.

[0009] The problem underlying the present invention is to achieve the most favorable possible temperature regulation of the battery.

[0010] This problem is solved by a battery according to claim 1. Preferred embodiments of such a battery are the subject of further claims and / or will become apparent from the following description of the invention.

[0011] According to the invention, a battery, in particular a traction battery and / or a lithium-ion battery for a motor vehicle, is constructed, which preferably has a parallelepiped cover and, arranged in the cover, a stack with a number of first electrodes and a number of second electrodes, which are arranged in alternating fashion in the stack with a respective separator arranged in between, the cover preferably completely surrounding the stack with the electrodes and the separators, and which further preferably (in a usable state) is constructed to be airtight.

[0012] The first electrode is electrically connected to a first battery pole which is integrated into the cover, preferably on a first end face of the cover, and the second electrode is electrically connected to a second battery pole which is also integrated into the cover, preferably on a second end face of the cover. These electrodes each have an electrically conductive substrate, in particular configured as a film, and on at least one face of this substrate a preferably prismatic, particularly preferably parallelepiped-shaped, active material layer. The active material layer may have a height (layer thickness) which is very small compared to its length and width. With the preferably configured parallelepiped-shaped active material layer, a (substantially) parallelepiped shape may also result for the stack. In addition to this, the separator may also be formed in a parallelepiped shape, the larger surface area of ​​the separator being preferably slightly larger than the larger surface area of ​​the active material layer, between which a separator is arranged for separation. The electrical connections between the electrodes and the battery poles, as well as the substrate, are used to pass the current with as little resistance as possible, and therefore preferably these electrical connections and substrates have as low a resistivity as possible (e.g., a maximum of 1 Ω×mm at 20° C.). 2 / m). The substrate of the first electrode and / or the second electrode forms a lateral protrusion on at least one face, in particular on the longitudinal face of the respective associated active material layer, i.e. the substrates protrude laterally or along their width beyond the dimension of the respective active material layer. The lateral protrusion of the substrate of the first electrode (only) (i.e. without the lateral protrusion of the substrate of the second electrode also) and / or the lateral protrusion of the substrate of the second electrode (only) (i.e. without the lateral protrusion of the substrate of the first electrode also) is (possibly respectively) connected to at least a thermally conductive conductive element, the at least one conductive element being in contact with the cover and / or forming part of or integrated in the cover. For example, a thermal conductivity of at least 5 W / (m×K) is considered thermally conductive, preferably a thermal conductivity of the conductive element of at least 50 W / (m×K) or at least 100 W / (m×K) or at least 200 W / (m×K) is realized (at 20° C. and at 50% air humidity, respectively). Metals, in particular aluminum, from which the at least one conductive element is preferably at least partially formed, are considered in the context of the present invention to be essentially thermally conductive.

[0013] The parallelepiped, and thus also the parallelepiped-shaped cover and the parallelepiped-shaped active material layer, have a length, a width and a height, where in the present invention (if there are corresponding differences (preferably configured in this way)) the length is the largest of the (edge) dimensions, the width is the middle dimension and the height is the smallest. In this case, the parallelepiped has two faces of larger area spanned by the length and the width, two longitudinal faces spanned by the length and the height and two end faces spanned by the width and the height. Shapes that do not exactly correspond to a geometric parallelepiped due to deviations caused by production may also be considered as parallelepipeds in the present invention.

[0014] The battery according to the invention is characterized by a good temperature regulation via at least one conductive element, which in a preferred arrangement can be formed with a relatively large overall area on the longitudinal side of the active material layer and thus also on the longitudinal side of the stack with the electrodes and the separator. The relatively good temperature regulation has an advantageous effect on the performance and / or lifespan of the battery. Furthermore, this allows a compact construction of the battery.

[0015] The cover may preferably be formed as a shape-stable casing. A casing is considered to be "shape-stable" if its three-dimensional shape does not collapse under its own weight without external load. Such a casing may preferably be configured shape-stable so that it does not collapse and, particularly preferably, does not significantly deform when loaded by external forces occurring during normal use ("rigid" casing). The casing may furthermore preferably be formed completely or partially from a metal, for example aluminum, which allows a casing that is shape-stable and also has good heat conductivity in a relatively simple and cost-effective manner.

[0016] According to a preferred embodiment of the battery according to the invention, at least one conductive element can be configured to be electrically connected to an associated one of the battery poles. This connection also serves to pass the current with as little resistance as possible, and therefore preferably has as low a resistivity as possible (e.g. a maximum of 1 Ω×mm at 20° C.). 2 / m). This embodiment of the battery according to the invention may have advantages in particular with regard to the manufacturability of the battery and in particular with regard to the manufacturability of the electrodes. This is particularly the case if the corresponding conductive element comprises (preferably configured in this way) a corresponding battery pole. In this case, the incorporation of the battery pole into the cover takes place within the framework of the assembly of the battery. For this purpose, it can be configured that an assembly comprising, on the one hand, a laminate with electrodes and separators and possibly further components, for example at least one deformation element, and, on the other hand, at least one conductive element, is inserted into a base casing of the cover formed as a casing. Here, the at least one conductive element may already be connected to the associated electrode. For the insertion of the assembly, the base casing may have a corresponding insertion opening. This insertion opening can then be closed by means of the casing cover. In this case, the incorporation of the battery pole into the casing can preferably take place by the battery pole protruding through the through opening of the casing cover after the assembly of the casing cover.

[0017] According to a further preferred embodiment of the battery according to the invention, in which at least one conductive element is electrically connected to an associated one of the battery poles, the at least one conductive element comprises a first partial element electrically connected to the associated battery pole and a second partial element which is at least partially electrically insulating and fills the gap between the first partial element and the cover. A component is considered electrically insulating if, despite the presence of a potential difference, a clear current flow is prevented through the component. This makes it possible to prevent an electrical connection between the conductive element, in particular its electrically conductive first partial element, and the cover, despite the conductive element being electrically connected to the associated battery pole. This can have an advantageous effect with regard to safety when using such a battery. Nevertheless, an advantageous discharge of thermal energy from the stack with the electrodes and the separator to or through the cover can be achieved via the second partial element.

[0018] Preferably, the conductive element can be arranged partially in the through-opening of the cover. This allows particularly good temperature regulation of the stack with the electrodes and separators, since direct heat exchange between the conductive element and the surroundings can be achieved. In this case, it is particularly preferred that the conductive element further comprises a first part arranged in the through-opening of the cover, which is preferably not in contact with the cover, and a second part which contacts the cover on the inside and is made electrically insulating or highly resistive and / or seals against gas leakage. This allows the first part to be made from a thermally conductive, often electrically conductive material, in particular from a metal, preferably from aluminum, and a (low-resistance) electrical connection between this first part and the cover can be avoided. At the same time, the second part of the conductive element can ensure that there is sufficient sealing of the cover in the area of ​​the through-opening and / or sufficient support of the conductive element in the cover.

[0019] According to a preferred embodiment of the battery according to the invention, the substrate of the first electrode can be configured with a longitudinal projection on one side, preferably on the end face of the respectively associated (preferably parallelepiped-shaped) active material layer (i.e. the substrate projects in the longitudinal direction beyond the dimensions of the respective active material layer), the longitudinal projection of the substrate of (only) the first electrode being connected to the first battery pole. Alternatively or additionally, the substrate of the second electrode can also be configured with a longitudinal projection on one side, preferably on the end face of the respectively associated (preferably parallelepiped-shaped) active material layer, the longitudinal projection of the substrate of (only) the second electrode being connected to the second battery pole. Thus, the electrical connection between the electrodes and the respectively associated battery pole can be realized directly, i.e. without via at least one conducting element. This allows, in some cases, an advantageous structural configuration of the at least one conducting element to be realized.

[0020] In the battery according to the invention, which can be characterized by a particularly simple construction, the substrate of the first electrode can be configured to form lateral projections on two longitudinal sides of the associated active material layer, these lateral projections on the two sides being respectively connected to the above-mentioned conductive elements or to a respective conductive element. In contrast, the substrate of the second electrode can form longitudinal projections in each case and can be directly connected to the second battery pole. Particularly preferably, in this case (or essentially) the first electrode can furthermore be configured to have an active material acting as a cathode and / or a substrate made of aluminum. In contrast, the second electrode can have an active material acting as an anode and / or a substrate made of copper or aluminum.

[0021] At least one conductive element of the battery according to the invention can preferably be made rigid. At least one conductive element is considered "rigid" if it does not deform appreciably (i.e. discernibly and functionally) when a load acts on it in the context of the envisaged application. This allows the conductive element to advantageously influence the stability of the electrode and separator stack or of an assembly including these components. This can be particularly advantageous in the context of the assembly of the battery according to the invention.

[0022] For the same reasons, at least one conductive element can be configured to cover at least 50% or at least 75% of a corresponding surface, in particular a longitudinal surface of the stack.

[0023] In particular, if the at least one conductive element is formed with such a relatively large surface area, it can furthermore preferably be configured so that the conductive element has at least one through-opening. This can have an advantageous effect on the one hand in terms of the lowest possible mass of the conductive element and thus in terms of the mass of the entire battery. Furthermore, such through-openings can advantageously have an advantageous effect on the distribution of the electrolyte in the cover. In other words, within the scope of the construction of the battery according to the invention, it can be configured so that the electrolyte is injected into the cover after the assembly comprising at least the stack with the electrodes and the separator and the at least one conductive element is inserted into the cover. For this purpose, the cover can have a corresponding filling opening. In particular, the cover can be configured in this case to have a filling opening in the part of its surface, preferably in the longitudinal surface adjacent to the at least one conductive element, and / or to include an overpressure valve. Such an overpressure valve can be used to relieve the overpressure that is formed as a result of damage that generates gas during the use of the battery. Here, it is advantageously possible to make it possible for the at least one through-opening, which is preferably configured, of the conductive element to be able to vent the gas to the overpressure valve. Such an overpressure valve can utilize a leakage opening, which is also used as a filling opening. According to a particularly advantageous embodiment, such an overpressure valve can be designed as a burst valve which is purposefully deactivated and destroyed in the process when a defined overpressure is reached, in particular as a burst film which, in the undamaged state, covers the leak opening of the cover.

[0024] In order to ensure the most reliable possible utilization of the battery according to the invention, at least one of the battery poles can be configured to be electrically insulated from the cover, so that as little current as possible flows between these components.

[0025] Furthermore, one of the battery poles can be configured to be connected to the cover with a high resistance. An electrical connection resulting in an ohmic resistance of 1 kΩ to 100 MΩ is considered to be "high resistance". This allows potential equalization between the cover and the corresponding battery pole or the electrode electrically connected thereto, without any appreciable current flowing between these components. Such potential equalization makes it possible to avoid corrosion of the cover, which may occur in the presence of a potential difference due to chemical interaction with the electrolyte contained in the cover. This is particularly effective if the cover is (preferably) formed at least on the inside from a metal, in particular from aluminum. A high resistance connection can particularly preferably be formed between the cover and a battery pole that is electrically connected to an electrode with an active material acting as a cathode.

[0026] The battery according to the invention may in particular be a traction battery for a motor vehicle or part of such a traction battery, which can be used to supply electric energy to an electric traction motor of the motor vehicle, which provides the drive power of the motor vehicle.

[0027] According to the present invention, a "film" is considered to be an object whose length and width (defining the major area of ​​the film) are many times greater than its height (i.e., the film thickness). The height may suitably correspond to up to 1 / 100 or 1 / 500 or 1 / 1000 or 1 / 10000 or 1 / 1000000 of the length and / or width of the film. In particular, a film may be dimensioned with a small film thickness such that when spread flat, it may distort or collapse appreciably under its own weight if unsupported.

[0028] The invention will be explained in more detail below on the basis of an embodiment shown in the drawing. [Brief description of the drawings]

[0029] [Figure 1] FIG. 1 is a schematic longitudinal section view of a battery according to the invention in combination with two cooling elements according to a first embodiment. [Diagram 2] FIG. 2 is a schematic plan view of a first electrode of the battery. [Diagram 3] FIG. 4 is a schematic plan view of a second electrode of the battery. [Figure 4] FIG. 2 is a schematic longitudinal cross-sectional view showing a stack including electrodes and separators of a battery. [Diagram 5] FIG. 2 is a schematic perspective view showing a base casing of the battery. [Figure 6] FIG. 1 is a schematic diagram showing an assembly including a laminate with electrodes and separators and conductive elements of a battery. [Figure 7] 1 is a schematic cross-sectional view of a portion of an assembly. [Figure 8] FIG. 2 is a schematic diagram showing the insertion of the assembly into the base casing within the framework of the construction of the battery. [Figure 9] FIG. 4 is a schematic longitudinal section view of a battery according to the invention in combination with two cooling elements according to a second embodiment. [Figure 10] FIG. 2 is a schematic plan view of a first electrode of the battery. [Figure 11] FIG. 13 is a schematic longitudinal section view of a battery according to the invention in combination with two cooling elements according to a third embodiment. [Figure 12] FIG. 4 is a schematic plan view of a second electrode of the battery.

[0030] In Fig. 1, a battery 1 according to the invention is shown in combination with two cooling elements 2. The cooling system contacts the battery 1 with a cover in the form of a parallelepiped casing 3 on each longitudinal side. The cooling elements 2 can, for example, be integrated into a cooling system (not shown) in which a cooling medium circulates. The cooling element 2 can itself be passed through by the cooling medium. By means of the cooling elements, advantageous temperature regulation of the battery shown or of a number of such batteries can be achieved. Here, it can be provided that between two batteries 1 according to the invention, one cooling element 2 is respectively arranged.

[0031] The illustrated battery 1 includes, in addition to the casing 3, a stack 4 with electrodes 5 and separators 6 arranged within the casing 3, which stack 4 is shown in more detail in Figure 4. In Figure 4, the stacking direction of the stack 4 runs parallel to the drawing plane, whereas in Figure 1, the stacking direction of the stack 4 is oriented perpendicular to the drawing plane.

[0032] The stack 4 contains alternating parallelepiped-shaped, thin (i.e. formed with a small height) electrodes 5 and also parallelepiped-shaped, thin and electrically insulating separators 6. The electrodes 5 are again alternately present in the stack 4 as first electrodes 5a, which function as cathodes when the battery 1 is discharged, and second electrodes 5b, which function as anodes when the battery 1 is discharged. The separators 6 may either be used as solid electrolyte or may be formed in such a way that they are saturated with a liquid electrolyte (not shown) in the usable state of the battery 1. By stacking the parallelepiped-shaped electrodes 5 and the separators 6 center-aligned, the stack 4 is obtained, which likewise has an approximately parallelepiped shape adapted to the parallelepiped shape of the casing 3. Slight protrusions between the various elements of the stack 4 and the somewhat larger formation of the separators 6 compared to the electrodes 5, especially on the peripheral side, are intentionally configured here, so that a sufficient separation of the electrodes 5 is guaranteed even if the stacking of these elements is imprecise.

[0033] Each electrode 5 comprises a film-like substrate 7 of a conductive material, for example a metal, which is provided on both sides with a respective layer of active material (active material layer 8) acting in one part as an anode or cathode, while at least one uncoated part of each substrate 7 is a respective static eliminator belonging to each electrode 5. Such an uncoated part of each substrate 7 is a protrusion 9 for the associated active material layer 8. The substrate 7 of the first electrode 5a can preferably be made of aluminium, whereas the substrate 7 of the second electrode 5b can preferably be made of copper and / or nickel and / or aluminium.

[0034] The substrate 7 of the first electrodes 5a forms one lateral projection 9a on each of their two longitudinal faces of the associated active material layer 8, each of which extends over the entire length of the first electrode 5a (see also FIG. 2), whereas the substrate 7 of the second electrodes 5b forms a longitudinal projection 9b on only one end face, which does not extend over the entire width of the respective second electrode 5b (see FIG. 3).

[0035] The lateral projections 9a on both sides of all first electrodes 5a are grouped together and firmly connected to a conductive element 10 (see FIG. 7), which is shown in more detail in FIG. 6. The connection between the lateral projections 9a and the conductive element 10 can be realized in particular material-connectively, for example by welding. The conductive element 10 comprises a U-shaped first partial element 11, which can be made entirely (possibly in several parts) from metal, in particular from aluminum. This first partial element 11 is primarily used as an electrical conductor and further electrically conductively connects the lateral projections 9a on both sides of the substrate 7 of the first electrodes 5a with a first battery pole 12a of the two battery poles 12 of the battery 1. The first battery pole 12a is either an integral component of the conductive element 10 or is also already firmly connected to a first partial element 11 of the conductive element 10 before the conductive element 10 is combined with the stack 4 and inserted into the casing 3 (see FIG. 8). After the corresponding assembly, including the stack 4 with the electrodes 5 and the separator 6 and the conductive element 10, is inserted into the casing 3, the first battery pole 12 protrudes through a through-opening 13 of the casing 3 (see FIGS. 5 and 8), which is slightly larger dimensioned on the peripheral side, but does not directly contact the casing 3 in this case. A frame-like sealing element 14 surrounding the first battery pole 12a ensures that the gap formed between the casing 3 and the first partial element 11 of the conductive element on the peripheral side of this through-opening is sealed.

[0036] The conductive element 10 further comprises two second partial elements 15, which are each firmly connected in direct contact with a portion of the first partial element 11 covering one of the longitudinal faces of the laminate 4. The second partial elements 15 each comprise a first portion 15a, which can preferably be made of metal, in particular aluminum, and which is in direct contact with the first partial element 11. Analogous to the first battery pole 12a, the first portion 15a of each second partial element 15 of the conductive element 10 projects into a slightly larger dimensioned through-opening 13 of the casing 3 on the peripheral side and does not come into direct contact with said casing 3. The frame-like second portion 15b of each second partial element 15 ensures that the gap formed on the peripheral side of the associated through-opening 13 between the casing 3 and the first partial element 11 of the conductive element is sealed and also fills the gap between the first partial element 11 of the conductive element 10 and the casing 3.

[0037] Basically, the first parts 15a of the second sub-elements 15 of the conductive element 10, which are accessible from the outside due to their arrangement in a respective one of the through-openings 13 of the casing 3, can also be used as the (first) battery pole 12a of the battery. However, the first parts 15a are used exclusively as thermal conductors, which allow good conduction of thermal energy from the battery 1 by direct contact with each of the cooling elements 2, or also to the battery 1 (for heating, if necessary). Here, good heat conduction from or to the inside of the stack 4 is achieved due to the large-area contact between the substrate 7 of the first electrode 5a and the conductive element 10.

[0038] Both the sealing element 14 surrounding the first battery pole 12a and the second part 15b of the second part 15 of the conductive element 10 are made of electrically insulating or highly resistive materials, respectively. A highly resistive construction is preferred for at least one of these elements in order to achieve potential equalization between the first electrode 5a and the casing 3. This makes it possible to avoid corrosion of the casing 3 due to electrochemical interactions with the electrolyte.

[0039] The conductive element 10, and in particular its first partial element 11, which is implemented rigidly, covers the adjacent longitudinal faces and the end faces of the stack 4 by at least 50% in each case. The conductive element 10 can thus advantageously stabilize the stack 4 with the electrodes 5 and the separators 6 within the framework of the assembly of the battery 1. Furthermore, the conductive element 10 can advantageously be used as a guide element when inserting the assembly with these components into the casing 3. Such an insertion can be carried out by pressing the assembly into the base casing 16 of the casing 3, which is formed open at one end face according to FIG. 8. In this case, the conductive element 10, or in particular the outer face of the first part 15a of the second partial element 15, can come into contact with the base casing 16 on the inside or slide along the base casing 16 in order to act as a guide element. The open end face of the base casing 16 is closed by means of a casing cover 17 after the insertion of the assembly with the stack 4 and the conductive element 10.

[0040] It can be arranged so that electrolyte is injected into the casing 3 after closing the casing 3 with the casing cover 17. For this, the casing 3 can have a corresponding filling opening 18 (see Figs. 5 and 8) on one of its longitudinal faces. After the electrolyte is injected, this filling opening 18 can be closed. For this, for example, a film 20 can be attached to the casing in a material-connecting manner, which covers the filling opening 18. This film can furthermore be arranged to break when a predetermined overpressure is reached inside the casing 3, thus forming an overpressure valve.

[0041] To ensure good distribution of the electrolyte injected into the casing 3 through the filling opening 18, the conductive element 10 has a number of through-openings 19 at least in the part adjacent to the longitudinal face of the casing 3, which includes the filling opening 18. The separator 6 is impregnated with the electrolyte. This causes the separator 6 to swell to a certain extent, which increases the dimensions of the stack 4. This applies in particular with regard to the height of the stack 4, but also to a lesser extent to its length and width. This increase in the dimensions of the stack 4 ensures that it is accommodated in the casing 3 substantially without play and also that the second part 15b of the second part element 15 in the corresponding casing opening 13 is located.

[0042] The longitudinal projections 9b of the substrate 7 of all second electrodes 5b are grouped together and electrically connected to the second battery pole 12b of the battery 1. This second battery pole 12b can be firmly integrated into the casing cover 17, with electrical insulation being provided between the second battery pole 12b and the casing cover 17. The electrical connection between the longitudinal projections 9b of the substrate 7 of the second electrodes 5b and the second battery pole 12b can be effected within the context of the assembly of the battery 1 after the assembly with the laminate 4 and the conductive element 10 has been inserted into the base casing 16 and before the casing cover 17 has been attached. The longitudinal projections 9b of the substrate 7 and the second battery pole 12b can be preferably connected to one another in a material-connecting manner for this purpose, for example by welding.

[0043] Figure 9 shows an embodiment of a battery 1 according to the invention, which differs from the embodiment shown in Figure 1 in that the conductive element 10, and in particular its first subelement 11, is L-shaped. Advantageously for this, the substrate 7 of the first electrode 5a forms, on only one of its longitudinal faces, a lateral projection 9a which is connected to the conductive element 10 (see also Figure 10).

[0044] The battery 1 according to the invention shown in FIG. 11 comprises two L-shaped conductive elements 10, of which a first conductive element 10a is connected to a lateral projection 9a forming the substrate 7 of the first electrode 5a according to FIG. 9 on one of its longitudinal faces. Correspondingly, in the battery according to FIG. 11, the substrate 7 of the second electrode 5b also forms a lateral projection 9a on one longitudinal face, respectively (see FIG. 12), the lateral projection 9a of the first electrode 5a and the lateral projection 9a of the second electrode 5b being arranged on opposite longitudinal faces of the electrode 5 or of the stack 4 with the electrode 5 and the separator 6. The lateral projection 9a of the second electrode 5b is connected to a second conductive element 10b of the conductive element 10. This second conductive element 10b may structurally correspond to the first conductive element 10a and may also comprise a second battery pole 12b. However, they may possibly differ at least in the materials used. For example, it may be configured such that at least the first sub-element 11 of the first conductive element 10a can be made from aluminum, whereas the first sub-element 11 of the second conductive element 10b is made from copper. [Explanation of symbols]

[0045] 1 Battery 2 Cooling elements 3. Casing 4. Laminate 5 electrodes 5a 1st electrode 5b 2nd electrode 6 Separator 7 Substrate 8 Active material layer 9 Protruding part of the board 9a Lateral protrusion 9b Longitudinal protrusion 10 Conductive Elements 10a First conductive element 10b Second conductive element 11 First part of the conductive element 12 Battery poles 12a 1st battery pole 12b 1st battery pole 13 Casing through opening 14 Sealing element 15 Second part of conductive element 15a First part of the second part element 15b Second part of the second part element 16 Base casing 17 Casing cover 18 Filling opening 19 Conductive element through opening 20 Film

Claims

1. A battery (1), comprising a parallelepiped cover and a stack (4) arranged in the cover, the stack (4) including a plurality of first electrodes (5a) and a plurality of second electrodes (5b), the first electrodes (5a) and the second electrodes (5b) being alternately arranged in the stack (4) with one separator (6) arranged therebetween, the first electrodes (5a) being electrically connected to a first battery pole (12a) mounted on a first end surface of the cover, the second electrodes (5b) being electrically connected to a second battery pole (12b) mounted on a second end surface of the cover, the first end surface and the second end surface being spanned by the width and height of the cover, the electrodes (5) being respectively connected to one conductive substrate (7) and one conductive substrate (8) and the second substrate (8) being electrically connected to a conductive substrate (9) and a conductive substrate (10).

1. A battery (1) having a parallelepiped-shaped active material layer (8) on at least one face of the substrate (7) of the first electrode (5a) and / or the second electrode (5b), characterized in that the substrate (7) of the first electrode (5a) and / or the second electrode (5b) forms a lateral protrusion (9a) on at least one longitudinal face of the associated at least one active material layer (8), the lateral protrusion (9a) of the substrate (7) of the first electrode (5a) and / or the lateral protrusion (9a) of the substrate (7) of the second electrode (5b) being connected to a thermally conductive conductive element (10), at least one of the conductive elements (10) being in contact with and / or forming part of the cover.

2. 2. The battery (1) according to claim 1, characterized in that at least one of the conductive elements (10) is electrically connected to an associated one of the battery poles (12).

3. 3. The battery (1) according to claim 2, characterized in that at least one of the conductive elements (10) comprises an associated battery pole (12).

4. 4. The battery (1) according to claim 2 or 3, characterized in that at least one of the conductive elements (10) comprises a first partial element (11) electrically connected to the associated battery pole (12) and a second partial element (15) which fills a gap between the first partial element (11) and the cover and acts at least partially electrically insulating or highly resistive.

5. 3. The battery (1) according to claim 1 or 2, characterized in that the conductive element (10) is partially arranged in a through opening (13) in the cover.

6. 6. The battery (1) according to claim 5, characterized in that the conductive element (10) comprises a first part (15a) arranged in the through opening (13) of the cover and a second part (15b) which is in contact with the cover on the inside and acts electrically insulating or highly resistant and / or seals against gas leakage.

7. 3. The battery (1) according to claim 1 or 2, characterized in that the substrate (7) of the first electrode (5a) forms a longitudinal protrusion (9b) on an end face of at least one associated active material layer (8), the longitudinal protrusion (9b) of the substrate (7) of the first electrode (5a) being electrically connected to the first battery pole (12a) integrated into the adjacent end face of the cover and / or the substrate (7) of the second electrode (5b) forms a longitudinal protrusion (9b) on an end face of at least one associated active material layer (8), the longitudinal protrusion (9b) of the substrate (7) of the second electrode (5b) being electrically connected to the second battery pole (12b) integrated into the adjacent end face of the cover.

8. 8. The battery (1) according to claim 7, characterized in that the substrate (7) of the first electrode (5a) forms lateral projections (9a) on two longitudinal sides of each associated at least one active material layer (8), the lateral projections (9a) being connected to the conductive element (10) or to a respective conductive element (10), and the substrate (7) of the second electrode (5b) forms the longitudinal projections (9b).

9. 3. The battery (1) according to claim 1 or 2, characterized in that the first electrode (5a) has a substrate made of active material and / or aluminum acting as a cathode.

10. 3. The battery (1) according to claim 1 or 2, characterized in that at least one of the conductive elements (10) is made rigid.

11. 3. The battery (1) according to claim 1 or 2, characterized in that at least one of the conductive elements (10) covers at least 50% or at least 75% of the surface of the associated stack (4).

12. 3. The battery (1) according to claim 1 or 2, characterized in that at least one of the conductive elements (10) has at least one through opening (19).

13. 3. The battery (1) according to claim 1 or 2, characterized in that the cover has a filling opening (18) in a portion adjacent to at least one of the conductive elements (10) and / or includes an overpressure valve.

14. 3. The battery (1) according to claim 1 or 2, characterized in that at least one of the battery poles (12) is electrically insulated from the cover.

15. 3. The battery (1) according to claim 1 or 2, characterized in that at least one of the battery poles (12) is connected to the cover with a resistance of 1 kΩ to 100 MΩ.

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