Temperature adjusting and exhausting device for energy accumulator single body and energy accumulator

Abstract

The invention relates to a temperature control and exhaust device for an energy store (3), in particular for energy store cells (2a, 2b, 2z) of an energy store of a vehicle, comprising a support structure (13) having at least one temperature control channel (131) for conducting a fluid for controlling the temperature of the energy store (3), the support structure (13) comprises a first side (137) facing the energy store (3) and a second side (138) facing away from the energy store (3), and wherein the support structure (13) comprises at least one exhaust channel (132) integrated with the support structure for discharging gases exhausted from the energy store cells (2).

Description

Technical Field

[0001] The invention relates on the one hand to a novel temperature control and ventilation device for an energy storage cell according to the preamble of claim 1 and on the other hand to an energy storage cell using a novel cell contact conduction system according to the preamble of claim 17, in particular for the automotive sector. Background Art

[0002] Energy storage is the core of the development of electric vehicles, such as electric vehicles. For this purpose, energy storage devices with high power and high energy density are required. Energy storage devices usually consist of a number of individual energy storage cells (e.g. lithium-ion battery cells) that are electrically connected to each other. Energy storage devices generally require a temperature management system to ensure that they operate in an optimized temperature range. Energy storage cells generally have a narrow operating temperature range (e.g. between +15°C and +45°C). The functional safety, service life and cycle stability of the energy storage cells and therefore the functional safety of the entire energy storage device also rely significantly on the energy storage cells not leaving this temperature range. If the temperature exceeds a critical mark, a so-called "thermal runaway" occurs. Thermal runaway can trigger an unstoppable chain reaction. In this case, the temperature rises sharply within a few milliseconds and the energy stored in the energy storage cells is suddenly released. Temperatures of more than 1000°C can therefore occur. The contents of the energy storage device become gaseous and cause fires that are difficult to extinguish by conventional means. The risk of thermal runaway begins at a certain temperature (e.g. 60° C.) and becomes extremely critical from another temperature threshold (e.g. 100° C.). Therefore, in energy accumulators, in particular energy accumulators for electric vehicles, energy accumulator management systems are used, with the help of which not only the charging and discharging behavior of the energy accumulator cells is controlled or regulated, but also measures are taken regarding temperature management and emergency management in the event of thermal runaway. In order to ensure targeted discharge of gases in the event of thermal runaway, the hermetically sealed energy accumulator cells can have exhaust openings. For example, these exhaust openings can be designed as predetermined fracture sites, which can allow gas to escape from the interior of the energy accumulator cell to the surrounding environment starting from a certain internal pressure. The exhausted gas may contain electrolytes, which may react with water to form hydrofluoric acid. In order to reduce the danger to surrounding components and / or personnel, this gas must be discharged in a controlled and targeted manner.

[0003] In order to electrically connect the energy storage cells, the energy storage device has a so-called cell connector, which electrically connects two or more poles of two or more energy storage cells to each other according to the circuit type. In the case of a series connection, for example, the anode of one energy storage cell is connected to the cathode of another energy storage cell. In order to be able to monitor and adjust the state of charge of each energy storage cell, each cell connector can be electrically connected to the control and / or regulating electronics of the energy storage device. In this way, the cell voltage in each energy storage cell can be measured and the state of charge of the corresponding energy storage cell can be inferred from the cell voltage. In addition, sensors, such as temperature sensors for monitoring the surface temperature of the energy storage cells, can also be provided, which are connected to the control and / or regulating electronics. In previous solutions, the control and / or regulating electronics are located in an independent structural assembly.

[0004] DE102007063178A1 discloses a battery with a heat conducting plate for regulating the battery temperature. The battery includes a plurality of interconnected single cells. The heat conducting plate has holes and / or cutouts in the region of the poles of each single cell, and the poles of each single cell are inserted into or extend from these holes and / or cutouts. The heat conducting plate is arranged between the single cell and the contact connection element placed on the pole. An electrical single cell connector and / or a single cell connector circuit board arranged according to the poles is provided as a contact connection element for electrically connecting the poles of the single cell. The elastic element and / or the contact connection element can also be located on the upper side of the heat conducting plate. During assembly, the sequence of these single layers must be tensioned with the single cell by screws. Therefore, the assembly process is time-consuming.

[0005] DE102009046385A1 discloses a battery with an exhaust system. The exhaust system is located on the side opposite to the poles of each battery cell. For this purpose, there is a base plate specially provided there, which has a passage for the exhaust opening and a collecting basin for collecting gas from the battery cell.

[0006] DE102012219784A1 discloses a battery module having a gas channel, a circuit board and a battery module housing for accommodating a plurality of battery cells. The gas channel is formed by a U-shaped profile having a through opening leading to the exhaust opening of the battery cell and a circuit board that closes the U-shaped profile on the side facing away from the exhaust opening. Therefore, the circuit board forms the wall of the gas channel and can directly contact the gas when the gas is discharged from the gas discharge opening of the battery cell. During assembly, the circuit board is fixed directly to the bus. The U-shaped profile is not directly connected to the bus. The disadvantage of this arrangement is that the discharged gas may damage the unprotected circuit board. In this case, the control and / or regulation of the battery module is no longer ensured. In addition, no active temperature control of the battery cell surface or the cell connector is provided.

[0007] EP3316384A1 discloses a circuit board arrangement according to the preamble of claim 1. A rigid circuit board for control and / or regulating electronics is provided, on which a cell connector for connecting an energy storage cell is directly and flatly mounted. Through this direct connection of the cell connector to the control and / or regulating electronics, direct heat transfer occurs from the electrical terminals of the energy storage cell to the control and / or regulating electronics. This arrangement leads to unavoidable measurement deviations when measuring voltage and temperature. In addition, a C-shaped flexible conductor circuit board carrying a temperature sensor element is fixed to the rigid circuit board. The flexible conductor circuit board extends through a slit-shaped through-opening in the rigid circuit board. This construction is complex and expensive both in terms of the manufacture of the individual components and in terms of final assembly. Summary of the invention

[0008] The object of the present invention is to provide a novel temperature control and ventilation device for a single accumulator cell which reduces the installation effort and requires less installation space.

[0009] This object is achieved by the overall teaching of claim 1 and claim 17. Advantageous embodiments of the invention are specified in the dependent claims.

[0010] According to the present invention, the supporting structure includes at least one exhaust channel integrated in the supporting structure for discharging the gas discharged from the energy storage unit. Therefore, the at least one exhaust channel and the at least one temperature control channel form an integral component of the supporting structure and thus form an integrated, compact, scalable unit contact conduction system. Since not only the at least one temperature control channel but also the exhaust channel are integral components of the supporting structure, the assembly cost when completing the energy storage unit can be significantly reduced. In addition, the functional reliability of the energy storage unit is improved and the required installation space is reduced. The exhaust channel enables the targeted discharge of hot gas during thermal runaway of the energy storage unit. In addition, the supporting structure provides the following feasibility: additional functional components (such as a circuit board or a printed circuit) of the control and regulation electronic device carrying the energy storage unit or each energy storage unit unit can be fixed on the back side of the exhaust channel. Compared with the conventional configuration, the number of components can be reduced.

[0011] Advantageously, the at least one exhaust channel and the at least one temperature control channel are each molded into the support structure. As a result, the support structure is constructed as a single component and can be produced in one manufacturing step. In addition, due to the one-piece design, there are no connecting points between the different channels, which achieves a higher functional reliability.

[0012] The exhaust channel can be constructed to be open on the first side of the supporting structure. The exhaust channel is thus constructed as a recess of the supporting structure that is open on one side, wherein in the installed state, the upper side of the accumulator or its accumulator cell is opposite to the exhaust channel. Therefore, during exhaust, the exhausted gas can be collected and discharged in the exhaust channel without additional components in the simple structure of the supporting structure. In the area of ​​the exhaust channel, there are corresponding predetermined fracture sites on the accumulator cell, which allow the gas to be discharged in a targeted manner at these sites and be discharged via the exhaust channel when thermal runaway occurs. Therefore, the surface of the accumulator cell defines the exhaust channel on the side of the exhaust channel that is opposite to the supporting structure. Therefore, the supporting structure does not need openings that are locally assigned to the predetermined fracture sites.

[0013] It is expedient for the support structure to have a wall which delimits the exhaust gas channel, the side of the wall which is opposite the exhaust gas channel serving as a mounting base for other components. This side of the wall can thus be used to mount other components of the cell contact-conducting system, for example for mounting a circuit board or printed circuit board including control and / or regulating electronics, and / or for mounting sensor devices, for example for determining the temperature of the energy storage device. The wall thus performs a dual function. For example, the circuit board or printed circuit is protected against thermal and / or chemical influences by the wall.

[0014] Preferably, the wall extends between two temperature control channels.

[0015] In an advantageous design, the wall has an offset portion forming a mounting recess. Other components of the single-body contact-conducting system can thereby be mounted sunken in the mounting recess. These components are thereby protected. At the same time, the mounting space is thereby reduced and the mechanical stability of the supporting structure is simultaneously increased.

[0016] The support structure expediently comprises fixing and / or centering means and / or through-openings and / or spacers for the circuit board or printed circuit in the region of the mounting recess. These structures serve to simplify assembly, to increase the safety of the installed device or to ensure the spacing of the control and / or regulating electronics or its circuit board on its underside in the direction of the wall.

[0017] According to an advantageous embodiment, the inner side of the exhaust gas channel has a protective layer, in particular against heat and / or abrasive media and / or chemical influences (eg chemical influences due to acids). In addition, the underside of the individual temperature control channels can also have a protective layer.

[0018] The protective layer can be a coated coating (e.g. a liquid, curable coating, e.g. a lacquer with added ceramic particles, a foamed and cured coating or e.g. a powder coating) or a layer applied to the wall or the relevant wall section and / or connected thereto (e.g. a mica board, ceramic fiber felt, glass fiber felt, carbon felt or cork board).

[0019] The at least one temperature control channel and the temperature control lines connected to the at least one temperature control channel are preferably designed to be sealed at all interfaces.

[0020] Expediently, the wall extends between two or at least two temperature control channels. The temperature control channels are preferably each located in an outer region of the support structure.

[0021] The support structure also enables a third temperature control channel or a third and a fourth temperature control channel to be present between the two edge temperature control channels. Advantageously, this makes it possible to additionally control the temperature of the circuit board arranged on the upper side of the support structure.

[0022] The supporting structure enables: the cell connector and the supporting structure to be connected to form a structural assembly that can be installed together. The cell connector is used to produce an electrical connection between the individual energy storage cells and is therefore fixed to the pole contacts of the individual energy storage cells, for example, by welding or screwing. By connecting the cell connector and the supporting structure to form a structural assembly that can be installed together, a prefabricated structural assembly can be achieved. By assembling the cell connector on the energy storage cell, the supporting structure with the exhaust channel, the temperature control channel and the circuit board can be assembled in a single process. Therefore, the cell contact conduction system can be advantageously pre-stored as a prefabricated assembly component.

[0023] Furthermore, the at least one temperature control channel can have a through-opening arranged laterally with respect to its longitudinal axis. These through-openings can be used to accommodate the cell connector and / or the encapsulated injection-molded cooling geometry of the cell connector and / or to fix the cell connector and / or the encapsulated injection-molded cooling geometry of the cell connector there.

[0024] By virtue of the support structure being designed as a molded part, preferably as an injection-molded part or an extruded part, the desired geometry can be easily realized.

[0025] Plastics offer high corrosion resistance, thermal insulation and electrical insulation at a low weight. In addition, electrically conductive fluids can be used in the temperature control channel. Aluminum or aluminum alloys offer the advantage of higher mechanical resistance. However, when using aluminum or aluminum alloys, non-conductive fluids must be used for temperature control.

[0026] For example, the supporting structure is a profile structure, preferably a hollow profile structure.

[0027] The invention also relates to an energy accumulator according to the preamble of claim 17. According to the invention, the energy accumulator comprises a single-cell contacting system according to at least one of claims 1 to 16. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The following is a detailed description of the design scheme of the present invention in accordance with the purpose with the help of the accompanying drawings.

[0029] Figure 1 A perspective view showing an embodiment of an energy storage device having a single-cell contact-conducting system;

[0030] Figure 2 Show Figure 1 A three-dimensional longitudinal sectional view of an embodiment of the accumulator along the section line AA;

[0031] Figure 3 Show Figure 1 An end side view of an embodiment of a monomer contact conduction system in;

[0032] Figure 4a Show Figure 1 A three-dimensional diagram of the bearing structure of the monomer contact conduction system;

[0033] Figure 4b A perspective view showing another design of the support structure;

[0034] Figure 4c A perspective view showing another design of the support structure;

[0035] Figure 5 Show Figure 1 A perspective view of a single-cell contact conduction system as a mountable component;

[0036] Figure 6a Show Figure 1 A perspective view of a circuit board with a cell contact-conducting system with a temperature sensor device fixed thereon, the circuit board comprising control and regulating electronics of an energy storage cell or of the energy storage;

[0037] Figure 6b A perspective view showing another embodiment of a circuit board having a single-body contact-conducting system of a temperature sensor device fixed thereon;

[0038] Figure 7a Show Figure 1 A three-dimensional diagram of a temperature sensor device of a monomer contact conduction system;

[0039] Figure 7b Show Figure 7a A cross-sectional view of a temperature sensor device in FIG.

[0040] Figure 8a A perspective view showing another embodiment of a temperature sensor device for a single cell contact-connection system;

[0041] Figure 8b Show Figure 8a A cross-sectional view of a temperature sensor device in FIG.

[0042] Figure 9a Show Figure 7a or Figure 7b A three-dimensional detail view of the temperature sensor device in the installed state;

[0043] Figure 9b Show Figure 7b A three-dimensional detail view of the temperature sensor device in the installed state;

[0044] Fig.10a Show Figure 1 A three-dimensional diagram of a circuit board device consisting of a circuit board and an additional circuit board in a single-body contact conduction system;

[0045] Fig.10b Show Figure 1 A three-dimensional diagram of a circuit board device consisting of a circuit board and an additional circuit board in a single-body contact conduction system;

[0046] Fig.11a Show Figure 1 A top view of a monomer contact conduction system in which the supporting structure is omitted;

[0047] Fig.11b Show Figure 1 A three-dimensional diagram of a monomer contact conduction system in which the supporting structure is omitted;

[0048] Fig.12a Show Figure 1 A partial perspective view of the circuit board arrangement in the area of ​​the distance holder;

[0049] Figure 12b Show Figure 1 A partial three-dimensional view of the circuit board device in the connection area of ​​the circuit board and the additional circuit board;

[0050] Fig.12c A perspective view of a detail showing an alternative embodiment of a circuit board arrangement in the connection region of the circuit board and the additional circuit board;

[0051] Fig.13a Show Figure 1 A three-dimensional detail view of the single-unit connector in FIG.

[0052] Fig.13b Show Figure 1 A three-dimensional detail view of the single-body connector on the terminal side;

[0053] Fig.14a A three-dimensional diagram showing another design of a temperature adjustment structure of a single connector;

[0054] Fig.14b A three-dimensional diagram showing another design of a temperature adjustment structure of a single connector;

[0055] Fig.14c A three-dimensional diagram showing another design of a temperature adjustment structure of a single connector;

[0056] Fig.14d A three-dimensional diagram showing another design of a temperature adjustment structure of a single connector;

[0057] Fig.15a A perspective view showing another design of a single-body connector;

[0058] Fig.15b Show according to Fig.15a A side view of a single-body connector;

[0059] Fig.16a A perspective view showing another design of a single-body connector;

[0060] Fig.16b Show according to Fig.16a A side cross-sectional view of a single-unit connector;

[0061] Fig.17a A perspective view showing another design of a single-body connector; and

[0062] Fig.17b A perspective view showing another design of a single-body connector without a temperature control structure. DETAILED DESCRIPTION

[0063] Figure 1 The reference numeral 3 in the figure denotes the entirety of the energy storage device 3. This is in particular a battery for an electric vehicle with an electric drive, for example. The energy storage device 3 has a plurality of energy storage cells 2a, 2b, 2z arranged next to each other and connected in series. The reference numeral 1 denotes an example of a cell contact-conducting system, which is provided to electrically connect the individual energy storage cells 2a, 2b, 2z to each other.

[0064] The energy storage cells 2a, 2b, 2z each have two pole contacts 22a, 22b (at Figure 2 Only one of the pole contacts 22a can be seen in the figure, namely the pole contact 22a for the anode and the pole contact 22b for the cathode. The pole contacts 22a, 22b can have a substantially flat surface or be designed as a thin plate.

[0065] The cell contacting and conducting system 1 further comprises a supporting structure 13 and cell connectors 11a, 11b mounted on the supporting structure 13, which are used to electrically connect and connect the individual energy storage cells 2a, 2b, 2z. In addition, a control and / or regulating electronic device 16 is positioned on the supporting structure 13, which is electrically connected to the cell connectors 11a, 11b via a connecting element 15. The control and / or regulating electronic device 16 comprises a circuit board 161a equipped with corresponding electronic components 162, which is connected to the supporting structure 13.

[0066] Since the cell connectors 11a, 11b are connected to the cell contact-conducting system 1, the entire cell contact-conducting system 1 can be fixed to the energy storage cells 2a, 2b, 2z of the energy storage 3 via the cell connectors 11a, 11b. For this purpose, the cell connectors 11a, 11b can be welded to the pole contacts 22a, 22b, for example. The cell contact-conducting system 1 can thus be pre-stored as an assembled assembly and installed as a whole on the energy storage cells 2a, 2b, 2z in one working step within the scope of an automated production line.

[0067] The cell contacting system 1 comprises a temperature control channel 131 and a venting channel 132, which are respectively described in detail below and are integrated into the supporting structure 13 according to the invention. The temperature control channel 131 is used to guide a gaseous or liquid fluid (not shown in the drawings) through the accumulator for adjusting the temperature of the accumulator 3. The venting channel 132 is used for controlled discharge of gases released in the event of a so-called "thermal runaway" of the accumulator 3. Figure 2 The exhaust opening 21 can be seen in FIG. It opens into the exhaust channel 132. The exhaust opening 21 can be designed, for example, as a predetermined breaking point, so that in the event of a "thermal runaway" the gas generated inside the energy storage cell 2a, 2b, 2z can escape at this point.

[0068] In this exemplary embodiment, fourteen energy storage cells 2a, 2b, 2z are shown by way of example, which are electrically connected to one another in series via the cell contacting system 1. For this purpose, the energy storage cells 2a, 2b, 2z are arranged in a rotational manner relative to one another, so that the pole contact 22a of the anode of the energy storage cell 2a faces the pole contact 22b of the cathode of the adjacent energy storage cell 2b, or the pole contact 22b of the cathode of the energy storage cell 2b faces the pole contact 22a of the anode of the adjacent energy storage cell 2a. The pole contact 22b of the cathode of the first energy storage cell 2a is connected to the cell connector 11b located at the end. The pole contact 22a of the anode of the first energy storage cell 2a is connected to the pole contact 22b of the cathode of the second energy storage cell 2b adjacent to the first energy storage cell via the cell connector 11a. The pole contact 22a of the anode of the second energy storage cell 2b is in turn connected to the pole contact 22b of the cathode of the third energy storage cell via the cell connector 11a, and so on. The pole contact 22a of the anode of the last energy storage cell 2z is connected to the cell connector 11b. The cell connector 11b is provided for electrically connecting the energy storage 3 to an electrical load (not shown), for example, an electric motor of an electric vehicle. The two cell connectors 11b thus form the energy storage terminals, i.e. the cathode and anode of the entire energy storage 3.

[0069] In alternative designs of the energy storage device 3, other numbers of energy storage cells can also be provided and / or the energy storage cells can be connected in parallel via the cell contacting system 1. To this end, the cell connectors 11a, 11b can, for example, connect the anode electrical terminals 22a of two or more energy storage cells or the cathode electrical terminals 22b of two or more energy storage cells to each other. The energy storage cells can also be arranged adjacent to each other in the same orientation, i.e., without rotation, so that the cathode electrical terminals of the energy storage cells of the energy storage device 3 are arranged along a first line and the anode electrical terminals of the energy storage cells are arranged along a second line extending parallel to the first line.

[0070] Figure 3 The cell contacting system 1 is shown in an end view. The supporting structure 13 has a first side 137 facing the energy storage device 3 or the energy storage cell 2a, 2b, 2z and a second side 138 facing away from the energy storage device 3 or the energy storage cell 2a, 2b, 2z, the first side being used as a support structure. Figure 3 The mounting side on the energy storage device 3 or the energy storage unit 2a, 2b, 2z (not shown in the figure). In addition, the supporting structure 1 has two temperature control channels 131 located on the side in the area of ​​the unit connector. There is an exhaust channel 132 between the two channels. The temperature control channel 131 and the exhaust channel 132 are molded into the supporting structure 1 according to the invention.

[0071] The exhaust channel 132 is formed by the lateral, mutually opposite temperature control channels 131 and the wall 139 extending between the temperature control channels 131. The exhaust channel 132 is open on the first side 137 of the supporting structure 13 in the direction of the energy storage cells 2a, 2b, 2z. As a result, in the installed state of the cell contact-conducting system 1, gas can reach the exhaust channel 132 from the exhaust opening 21 of the energy storage cells 2a, 2b, 2z and be discharged there from in a controlled manner. This enhances the protection of the vehicle occupants.

[0072] As from Figure 4a As can be seen in the figure, the supporting structure 13 is designed as a molded part, in particular an injection molded part or an extruded part, preferably in particular a plastic injection molded part or a plastic extruded part. The supporting structure 13 can be designed as a profile structure, preferably a hollow profile structure. In this way, a relatively light-weight single-body contact-conducting system 1 can be achieved.

[0073] The support structure 13 is provided with a protective layer 133 in the region of the first side 137 (see Figure 3 ), in particular to protect against heat and / or abrasive media and / or chemical influences (e.g. due to acids). The protective layer 133 can be made of a heat-resistant and / or acid-resistant material. The protective layer 133 can be a coated coating (e.g. a liquid curable coating, a paint with ceramic particles added, a foamed and cured coating or a powder coating) or a layer applied to the wall (e.g. a mica board, a ceramic fiber mat, a glass fiber mat or a carbon mat or a cork board) or a combination thereof. If necessary, the protective layer can also be additionally arranged below the temperature control channels 131a, 131b (as not visible in the figure).

[0074] The temperature adjustment channels 131 are respectively formed by cavities. Figure 3 As shown, the temperature control channel 131 has a lateral through-opening 140, into which the cell connectors 11a, 11b with the cooling structure 12 encapsulated by injection molding are inserted and fixed. The cooling structure 12 can be bonded and / or welded to the supporting structure 1, for example. The through-opening 140 is sealed in this way. The cooling structure 12 of the cell connectors 11a, 11b is flushed by the fluid circulation for temperature control in the temperature control channel 131 and is in thermal contact with the fluid.

[0075] Furthermore, the support structure 13 has a mounting recess 135 on a second side 138 opposite the exhaust duct 132. The mounting recess is formed by an offset of a wall 139. The mounting recess 135 serves to position the control and / or regulating electronics 16 in a particularly space-saving manner. A fixing and / or centering device 136 can be provided on the mounting base of the mounting recess 139 for fixing and / or centering the circuit board of the control and / or regulating electronics 16. Furthermore, a spacer 136a can be provided for spacing the lower side of the control and / or regulating electronics 16 or its circuit board 161a from the mounting base of the mounting recess 139. The mounting recess 135 enables a flat design of the cell contact system 1. The offset of the wall 139, which forms the mounting recess 135, also serves to increase the mechanical stability of the support structure 13. The offset acts here like a reinforcing rib, i.e. a groove-shaped reinforcement, thereby increasing the planar moment of inertia of the support structure 13. The supporting structure 13 can thus better withstand the pressure increase in the exhaust channel 132 that occurs, for example, when the energy storage cells 2a, 2b, 2z are exhausted. In addition, the wall 139 has a through-opening 141 for the temperature sensor device 17a, 17b and / or for contacting the sensor circuit board 18a, 18b.

[0076] The circuit board 161a has holes, for example, through which the circuit board 161a is inserted on the fixing and / or centering means 136 (which is designed as a "domes" in this embodiment). The ends of the domes can then be upset into mushroom heads, thereby fixing the circuit board 161a on the supporting structure 13.

[0077] If necessary, more than two temperature control channels 131 can also be formed into the supporting structure 13. Figure 4b As shown, an additional temperature control channel 131 can be provided in the middle of the lower side of the wall 139 , whereby the wall 139 between the two outer temperature control channels 131 and thus the circuit board located on the upper side can be additionally temperature controlled.

[0078] according to Figure 4c According to the design scheme, second temperature control channels 131 are respectively arranged in the side areas.

[0079] Figure 5 The cell contacting system 1 according to the invention is shown as a preassembled assembly which comprises the cell connectors 11a, 11b, the temperature control channel 131, the exhaust gas channel 132 and the control and / or regulating electronics 16. The cell contacting system 1 greatly simplifies the production of the energy storage device 3, since only the cell connectors can be mounted on the energy storage device cells, for example by welding.

[0080] Alternatively, the cell connector can also be screwed or soldered to the energy storage cell.

[0081] Through openings 111, such as through holes, may be provided on the cell connectors 11a, 11b. These through openings may be used as inspection openings. Furthermore, if necessary, the measuring wires may be placed through these through openings 111 on the threaded holes on the pole contacts 22a, 22b located below the through openings 111. This allows, for example, the contact between the cell connectors 11a, 11b and the pole contacts 22a, 22b to be checked.

[0082] Alternatively, the cell connectors 11 a , 11 b can also be connected, for example screwed, to the pole contacts 22 a , 22 b via the through-openings 111 if necessary.

[0083] Figure 6a and Figure 6b Two exemplary embodiments of temperature sensor devices 17a, 17b are shown for detecting the temperature at the upper side 23 (not shown) of the energy storage cells 2a, 2b, 2z. In these exemplary embodiments, the temperature sensor device 17a is mounted on a circuit board 161a and the temperature sensor device 17b is mounted on a circuit board 161b by means of a snap connection in each case. The circuit board 161b can also be provided for the temperature sensor device 17a.

[0084] Figure 7a and Figure 7b A perspective view and a sectional view of a first exemplary embodiment of a temperature sensor device 17 a are shown.

[0085] The temperature sensor device 17a has a flexible sensor circuit board 176a, which has a sensor element 171a integrated on the sensor circuit board 176a, and a housing molding element 172a for mounting on a housing. Figure 6a , 6b On the circuit boards 161a, 161b in.

[0086] The housing profile element 172a comprises a guide groove 179a for the flexible sensor circuit board 176a and thus serves to position and hold the sensor element 171a. In addition, the housing profile element 172a has a base 178a with a connecting element 175a and an elastically deflectable elastic arm 177a. The connecting element 175a is configured as a snap connection with two elastic locking arms. They are used to Figure 6a A step 178c is also provided on the connecting element 175a, and the step is used to abut against the lower side of the circuit board 161a.

[0087] The sensor printed circuit board 176a has an electrical terminal 174a which is electrically connected to the sensor element 171a via a conductor path (not shown).

[0088] Furthermore, an elastic, heat-conducting contact element 173a is arranged on the underside of the temperature sensor device 17a in the region of the sensor element 171a in order to avoid the formation of a gap and to transmit the temperature of the energy storage cell to be detected to the sensor element 171a.

[0089] Figure 9a Shows the installed state Figure 7a and Figure 7b The temperature sensor device 17a is shown without the support structure 13. The latching arms extend through the cutouts provided on the circuit board 161a and thus achieve a mechanical connection to the circuit board 161a. The spring arms press the sensor element 171a onto the upper side 23 of the energy storage cell 2a. The electrical terminal 174a extends through the circuit board 161a through the slot-shaped cutout 162a and is connected to the circuit board 161a, for example by soldering via a soldering surface.

[0090] When installing the temperature sensor device 17a, the housing molding element 172a can first be connected to the sensor circuit board 161a. Subsequently, the sensor circuit board 176a can be introduced into the guide groove 179a of the housing molding element 172a from the side opposite to the housing molding element 172a through the slit-shaped recess 162a of the circuit board 161a. After the sensor circuit board 176a is positioned in the guide groove 179a, the electrical terminal 174a of the sensor circuit board 176a can be connected to the circuit board 161a. This simplifies the operation. In addition, the installation can be automated.

[0091] like Figure 3 As shown, the temperature sensor device 17a extends through the through opening 141 of the support structure 13 (see Figure 4a ), and can be positioned in this way in the exhaust duct 132. The supporting structure 13 enables thermal separation of the circuit board 161a and the sensor element 171a. As a result, even if the temperature sensor device 17a is thermally damaged, the circuit board 161a remains intact, and defects of the temperature sensor devices 17a, 17b can still be detected by the control and / or regulating electronics 16. The step 178c rests on the underside of the circuit board 161a.

[0092] The base 178a is provided for covering or closing the through-opening 141 of the support structure at the first side 137 of the support structure, thereby preventing or at least reducing a gas flow through the through-opening 141 .

[0093] Figure 8a and Figure 8bA perspective view and a sectional view are shown of another embodiment of a temperature sensor device 17 b .

[0094] The temperature sensor device 17b has a sensor element 171b and a housing molding element 172b. The housing molding element 172b includes a base 178b having a connecting device 175b and a step 178d, which have the same Figure 7a and Figure 7b The base 178a, the connecting means 175a and the step 178c of the temperature sensor device 17a are correspondingly constructed and have the same function.

[0095] In this design, the housing molding element 172b of the temperature sensor device 17b has a cavity 176b for positioning the sensor element 171b. The cavity 176b is open on the side facing the circuit boards 161a, 161b, 161c. Thus, the sensor element 171b can be pushed into the cavity 176b.

[0096] The sensor element 171 b may be a wired electronic structural element for plug-in mounting (through-hole technology, THT) having two electrical terminals 174 b .

[0097] On the side of the housing molding element 172b facing away from the electrical terminal 174b, there is a contact element 173b, which at least partially surrounds the sensor element 171a. The contact element 173b is made of an elastic heat-conducting material. In addition, the contact element 173b is partially surrounded by the cavity 176b and rests on a shoulder in the cavity 176b.

[0098] Figure 9b Shows the installed state Figure 8a and Figure 8b The temperature sensor device 17b is shown in the figure, while the supporting structure 13 is not shown.

[0099] The temperature sensor device 17 b is mechanically connected to the circuit board 161 b via a snap-fit ​​connection via the connecting element 175 b .

[0100] For connecting the electrical terminals 174b, the circuit board 161b can have contact holes with contact rivets, for example. The electrical terminals 174b can be inserted through these contact holes and soldered to the circuit board 162b from the side opposite to the sensor element 171b.

[0101] exist Figure 9b The contact element 173b covered by the housing profile element 172b is pressed or compressed. As a result, the sensor element 171b can be installed in a manner pressed onto the upper side 23 of the energy storage cell 2a with a certain pressing force.

[0102] The temperature sensor device 17b may be mounted on the circuit board 161b as an assembled structural assembly.

[0103] Good thermal contact is ensured by pressing the temperature sensor devices 17a, 17b against each other. In addition, for example, manufacturing tolerances, thermal expansions or relative movements of the components with respect to one another can be compensated.

[0104] One of the two temperature sensor devices 17 a , 17 b or a combination of both can be provided in the cell contact-connection system 1 .

[0105] The circuit board may be a conductive circuit board, that is, a printed circuit board for carrying electronic components (ie, a printed circuit board).

[0106] Fig.10a and Fig.10b The circuit board arrangement of the single-body contact-connection system 1 in the form of a circuit board 161a with an additional circuit board 18a, on which the sensor element 181b and the Fig.10b A sensor element 181a , for example a temperature sensor element, a gas sensor element, a humidity sensor element or a pressure sensor element, is covered by the contact element 173c . Figure 2 and Figure 3 Show according to Fig.10a and Fig.10b The circuit board arrangement is positioned on the energy storage cells 2 a, 2 b, 2 z of the energy storage device 3 .

[0107] Fig.11a and Fig.11b Show according to Fig.10a and Fig.10b Positioning of the circuit board arrangement on the energy storage cells 2a, 2b, 2z of the energy storage 3, the support structure 13 being omitted for reasons of illustration. Sensors for different parameters, such as temperature, gas, pressure and / or humidity, can be positioned along the surface of the energy storage 3 using the circuit board arrangement.

[0108] Fig.12a Show according to Fig.10a and Fig.10b An enlarged detail of the additional printed circuit board 18 a in the region of the spacer 19 .

[0109] Figure 12b An enlarged view of the contact means 182a between the printed circuit board 161a and the additional printed circuit board 18a is shown.

[0110] Fig.12c An alternative embodiment of a printed circuit board 161c and an additional printed circuit board 18b is shown with alternative contact means 182b.

[0111] according to Fig.10a or Fig.10b The additional circuit board 18a and the circuit board 161a are spaced apart from each other, vertically offset from each other, and electrically connected to each other via the contact-connection device 182a. The contact-connection device 182a extends through the through opening 141 (see FIG. 1 ) of the support structure 13 in the installed state of the single-unit contact-connection system 1. Figure 3 Advantageously, the additional circuit board 18a can thus be positioned on the side 137 of the support structure 13 facing the energy storage device within the exhaust gas channel 132. Thus, a thermal insulation of the additional circuit board 18a from the circuit board 161a is achieved by the wall 139 and / or the protective layer 133 of the support structure 13.

[0112] Fig.10a , Fig.10b The additional circuit board 18a in the embodiment is designed in a plate-shaped manner and is mechanically connected to the supporting structure 13 via the spacer 19. Fig.12a The distance holder 19 has a connecting element 191 on the side facing the additional circuit board 18a and on the side facing the supporting structure 13. The connecting element 191 can be constructed as a snap connection with two locking arms. The locking arms are elastic elements that can pass through the additional circuit board 18a and the supporting structure 13 respectively to achieve a mechanical connection with the additional circuit board 18a and the supporting structure 13. For this purpose, the additional circuit board 18a can have a cutout 184, and the supporting structure 13 can have a cutout 142 for this purpose (see Figure 2 ), the connecting element 191 can be embedded in the recess.

[0113] Sensor elements 181a, 181b are arranged on the additional circuit board 18a, which are electrically connected to the circuit board 161a via conductor tracks (not shown) and via contact-connection means 182a, 181b. The sensor elements 181a, 181b can be, for example, SMD components which are soldered to the additional circuit board 18a at the soldering surface.

[0114] according to Fig.10a , the sensor element 181b is located on the side of the additional circuit board 18a facing the circuit board 161a. The sensor element 181b can be, for example, a sensor element for measuring environmental parameters, such as a temperature sensor element, a gas sensor element, a humidity sensor element or a pressure sensor element. The sensor element 181b is not in direct contact with the energy storage unit in the installed state of the unit contacting and conducting system 1. Thus, for example, the gas temperature, gas composition, humidity or pressure in the exhaust channel 132 can be measured with the sensor element 181b. The sensor element 181b can also be an electronic component capable of detecting multiple environmental parameters.

[0115] like Fig.12aAs shown, the sensor element 181a is located on the side of the additional circuit board 18a facing away from the circuit board or facing the energy storage unit. The sensor element 181a can be, for example, a temperature sensor element, for example, a Pt-100 resistor configured as an SMD component. There is a contact element 173c on the sensor element 181a, which contacts the sensor element 181a (at Fig.12a 173a). The contact element 173c is made of a heat-conducting elastic material. When the cell contact-conducting system 1 is mounted on the energy storage cell of the energy storage 3, the contact element 173c can be squeezed or compressed. As a result, the sensor element 181a can be pressed onto the upper side 23 of the energy storage cell with a certain pressing force. For this purpose, the sensor element 181a can advantageously be located in the area of ​​the distance holder 19. Thermal contact is ensured by pressing the sensor element 181a. In addition, for example, manufacturing tolerances, thermal expansions or relative movements between components can be compensated.

[0116] according to Figure 12b as well as Fig.12c The contact means 182a, 182b are elevated conductor webs 183a, 183b which can be soldered, for example, to soldering surfaces on the additional circuit boards 18a, 18b.

[0117] according to Figure 12b The circuit board 161a has a through opening for the contact-making device 182a and a contact strip 163a. ​​The contact strip 163a can be soldered to the circuit board 161a. The conductor tab 183a can be inserted into the contact strip 163a. ​​For this purpose, the contact strip 163a can have a spring contact, for example.

[0118] according to Fig.12c The circuit board 161c has a press-fit through-hole for the contact-making element 182b. The conductor connection piece 183b can be pressed into the press-fit through-hole.

[0119] The additional printed circuit board 18 b is designed differently from the additional printed circuit board 18 a in the region of the contact means 182 b .

[0120] Fig.13a and Fig.13b The cell connectors 11a, 11b are shown for electrically contacting the pole contacts 22a, 22b of the energy storage cells 2a, 2a, 2z. In this exemplary embodiment, two cell connectors 11b at the end and thirteen cell connectors 11a are shown.

[0121] The cell connector 11a is provided for electrically connecting the pole contact 22a of one energy storage cell, for example 2a, to the pole contact 22b of an adjacent energy storage cell, for example 2b. For this purpose, the cell connector 11a has a base body 110, which has a first contact surface 112a and a second contact surface 112b, which are connected to the pole contacts 22a, 22b, for example, welded.

[0122] The two cell connectors 11b are provided for providing contact-making means with an unillustrated electrical load, such as an electric motor of an electric vehicle or with an adjacent energy storage device, on the first energy storage cell 2a and the last energy storage cell 2z. The cell connector 11b has a base body 113 with a contact surface 112a, which is connected, for example, welded, to the cathode pole contact 22b of the first energy storage cell 2a or the anode pole contact 22a of the last energy storage cell 2z. In addition, the base body 113 has a current output 110d. The current output 110d of the two cell connectors 11b thus form the anode and cathode terminals of the energy storage device 3.

[0123] The base body 110, 113 of the cell connector 11a, 11b is made of a flat material with a preferably uniform layer thickness, which is electrically conductive, for example, a metal sheet. The base body 110, 113 has a first side S1, S1' and a second side S2, S2', and in the region of the second side S2, S2', a temperature control structure 12 is encapsulated and injection-molded in a partial region 110a, respectively, which increases the surface area of ​​the cell connector 11a, 11b. The temperature control structure 12 has, for example, a plurality of temperature control ribs 124a extending parallel to each other.

[0124] The temperature control structure 12 is preferably a thermally conductive, electrically insulating material, in particular a plastic.

[0125] In the cell connector 11a, the temperature control structure 12 extends along the entire length L1 of the first side S1. In the cell connector 11b, the temperature control structure 12 extends only along the length L2 of the first side S1' in the region of the contact surface 112a.

[0126] A recess 114 can be provided between the contact surfaces 112a, 112b of the cell connector 11a. On the one hand, the current and the heat generated thereby are transferred via the recess to the injection-molded subregion 110a encapsulated by the temperature control structure 12. On the other hand, the base body 110 thus has a higher elasticity. As a result, thermal expansions or relative movements of adjacent energy storage cells 2a, 2b, 2z with respect to one another can be better compensated.

[0127] Furthermore, the base bodies 110 , 113 of the individual connectors 11a , 11b can have recesses 115 , for example in the form of half-moon-shaped through-holes. These recesses also increase the elasticity of the base bodies 110 , 113 .

[0128] Figures 14a to 14d Different embodiments of the temperature control structure 12 are shown. A temperature control wave structure 124b, a temperature control knot 124c, a temperature control pin 124d or a temperature control sheet 124e can be provided as the temperature control structure.

[0129] Fig.15a , Fig.15b , Fig.16a , Fig.16b , Fig.17a , Fig.17b An alternative embodiment of the cell connector 11a is shown, in which additional contact elements 121a, 121b, 121c are provided, which are in direct contact with the top side 23 of the energy storage cell via contact surfaces 122a, 122b, 122c. This allows the energy storage cells 2a, 2b, 2z to be temperature-controlled.

[0130] Fig.15a and Fig.15b The contact element 121a of the temperature control structure 12 is here injection molded around the end region of the base body 110 so that its contact surface 122a lies flat on the surface of the energy storage unit 2a, 2b or bridges the height of the pole contacts 22a, 22b, see Fig.15a , Fig.15b .

[0131] Fig.16a and Fig.16b as well as Fig.17a and Fig.17b Two further alternative designs of a cell connector 11 a with contact elements 121 b , 121 c (eg contact plates) are shown.

[0132] according to Fig.16a and Fig.16b , the contact element 121b is injection molded by the temperature control structure 12 and has an offset portion 127a. The offset portion 127a can have substantially the same height as the pole contacts 22a, 22b with respect to the surface 23. As a result, the base body 110 and the contact element 121b can be connected to each other, for example, on a plane, with the result that the contact element 121b is directly placed on the upper side of the energy storage unit. A gap 129a is provided between the base body 110 and the contact element 121b so that the base body 110 and the contact element 121b do not directly contact each other. The base body 110 and the contact element 121b are connected to each other through the temperature control structure 12. The base body 110 and the contact elements 121b, 121c can therefore be electrically insulated from each other by the non-conductive temperature control structure 12. The contact element 121b can be the same material as the base body 110.

[0133] Fig.17a and Fig.17bThe variant has an additional offset 127b between the two contact surfaces 112a, 112b. The contact element 121c extends all the way to the exhaust opening 21 and surrounds the pole contacts 22a, 22b of the energy storage cells 2a, 2b. The additional offset 127b can additionally increase the heat conduction between the contact element 121c and the temperature control structure 12 and the mechanical stability of the cell connector 11a.

[0134] The offsets 127a, 127b can be produced, for example, by two bent edges of a plate-shaped raw material (for example a metal sheet). Fig.17b As shown, the temperature control structure is omitted for illustration reasons.

[0135] The base body 110 and the contact elements 121 b , 121 c can advantageously be produced from a common sheet-metal blank, for example cut or punched.

[0136] Corresponding contact elements may also be provided in the single-body connector 11b at the end. The geometry of the contact elements for the single-body connector 11b may simply be matched to the geometry of the single-body connector 11b.

[0137] The cell connectors 11a, 11b can have an interface to the temperature control channel 131 and can be connected to the temperature control channel, for example welded or adhesively bonded, preferably in the region of the temperature control structure 12. For this purpose, the through-opening 140 of the support structure 13 can be arranged laterally in the direction of the pole contacts and / or in the direction of the exhaust gas channel and / or in the direction of the battery cell.

[0138] The temperature control structure 12 of the single connector can close the through opening 140 of the support structure 13. In addition, the temperature control structure 12 can isolate the base elements 110, 113 and / or the contact elements 121b, 121c from the temperature control fluid located in the temperature control channel 131. For example, a fluid formed by a conductive liquid can be provided. The temperature control structure 12 can also insulate the base elements 110, 113 and / or the contact elements 121b, 121c from the support structure 13. In this variant, the support element can alternatively be made of metal, such as aluminum or an aluminum alloy.

[0139] Alternatively, the embodiment of the individual connectors 11a, 11b can also be used without the temperature control channel 131. In this case, for example, the ambient air can be used for temperature control. Reference numerals list

[0140] 1 Monomer contact conduction system

[0141] 2a The first accumulator monomer

[0142] 2b Second accumulator monomer

[0143] 2z Final accumulator unit

[0144] 3 Accumulator

[0145] 4a Circuit board device

[0146] 4b Circuit Board Device

[0147] 11a single connector

[0148] 11b single connector

[0149] 111 through opening

[0150] 110 base

[0151] 113 matrix

[0152] Part of 110a

[0153] 110d Current output unit

[0154] 112a contact surface

[0155] 112b contact surface

[0156] 12 Temperature control structure

[0157] 121a Contact element

[0158] 121b contact element

[0159] 121c contact element

[0160] 122a contact surface

[0161] 122b contact surface

[0162] 122c contact surface

[0163] 124a Temperature regulating rib

[0164] 124b temperature regulating waveform structure

[0165] 124c thermostat

[0166] 124d temperature control pin

[0167] 124e temperature control sheet

[0168] 127a offset

[0169] 127b offset

[0170] 129a Gap

[0171] 129b gap

[0172] 13 Load-bearing structure

[0173] 131 Temperature control channel

[0174] 132 Exhaust channel

[0175] 133 protective layer

[0176] 135 installation recess

[0177] 136 Fixing and / or centering devices

[0178] 136a Distance Keeper

[0179] 137 First Side

[0180] 138 Second side

[0181] 139 wall

[0182] 140 through opening

[0183] 141Through opening

[0184] 142 blank space

[0185] 15 Connecting elements

[0186] 16 Electronic control and / or regulation devices

[0187] 161a circuit board

[0188] 161b circuit board

[0189] 161c circuit board

[0190] 162 Electronic components

[0191] 162a Blank section

[0192] 163a Contact strip

[0193] 17a Temperature sensor device

[0194] 17b Temperature sensor device

[0195] 171a Temperature sensing element

[0196] 171b temperature sensing element

[0197] 172a Shell molding element

[0198] 172b Shell molding element

[0199] 173a Contact element

[0200] 173b contact element

[0201] 173c contact element

[0202] 174a terminal

[0203] 174b terminal

[0204] 175a Connector

[0205] 175b connector

[0206] 176a circuit board

[0207] 177a Elastic arm

[0208] 178a base

[0209] 178b base

[0210] 178c ladder

[0211] 178d stairs

[0212] 179a Guide slot

[0213] 18a Additional circuit board

[0214] 18b additional circuit board

[0215] 181a sensor element

[0216] 181b sensor element

[0217] 182a contact connection device

[0218] 182b contact connection device

[0219] 183a Conductor tab

[0220] 183b conductor tab

[0221] 184 blank space

[0222] 19 Distance Keeper

[0223] 191 Connectors

[0224] 21 Exhaust openings

[0225] 22a pole contact

[0226] 22b pole contact

[0227] 23 upper side

Claims

1. A temperature control and exhaust device for an accumulator (3), in particular an accumulator cell (2a, 2b, 2z) for an accumulator for a vehicle, comprising: A supporting structure (13) having at least one temperature control channel (131) for guiding a fluid for temperature control of an energy accumulator (3), the supporting structure (13) comprising a first side (137) facing the energy accumulator (3) and a second side (138) facing away from the energy accumulator (3), characterized in that: The supporting structure (13) comprises at least one exhaust gas channel (132) integrated in the supporting structure for discharging gas exhausted from the energy storage unit cells (2a, 2b, 2z).

2. The temperature control and exhaust device according to claim 1, characterized in that: The at least one exhaust gas channel (132) and the at least one temperature control channel (131) are respectively molded into the supporting structure (13).

3. The temperature control and exhaust device according to claim 1 or 2, characterized in that: The at least one exhaust gas channel (132) is designed to be open on a first side (137) of the supporting structure (13).

4. The temperature control and exhaust device according to at least one of the preceding claims, characterized in that The supporting structure (13) has a wall (139), a side of which, lying opposite the energy storage device (3), serves as a mounting base.

5. The temperature control and exhaust device according to claim 4, characterized in that: The supporting structure (13) has fixing and / or centering means (136) and / or a through-opening (141).

6. The temperature control and exhaust device according to claim 5, characterized in that: The wall (139) has an offset portion that forms a mounting recess (135).

7. The temperature control and exhaust device according to at least one of the preceding claims, characterized in that The supporting structure (131) comprises, preferably in the region of the wall (139) and / or the mounting recess (135), fixing and / or centering means (136) and / or a through-opening (141) and / or a spacer (136a).

8. The temperature control and exhaust device according to at least one of the preceding claims, characterized in that The inner side of the exhaust gas channel (132) and / or the lower side of the at least one temperature control channel (131) has a protective layer (133).

9. The temperature control and exhaust device according to claim 7, characterized in that: The protective layer (133) is made of a heat-resistant and / or acid-resistant material.

10. The temperature control and exhaust device according to at least one of claims 4 to 9, characterized in that The wall (139) extends between two or at least two temperature control channels (131).

11. The temperature control and exhaust device according to claims 4 to 9, characterized in that: A third temperature control channel (131) is located between the two edge temperature control channels (131) or a third and a fourth temperature control channel (131) are located.

12. The temperature control and exhaust device according to at least one of the preceding claims, characterized in that A cell connector (11a, 11b) for electrically connecting the energy storage cell (2a, 2b, 2z) is provided, and the cell connector (11a, 11b) and the supporting structure (13) are connected to form a structural assembly that can be installed together.

13. The temperature control and exhaust device according to at least one of the preceding claims, characterized in that The at least one temperature control channel (131) has a recess (140) which is arranged laterally with respect to a longitudinal axis of the temperature control channel.

14. The temperature control and exhaust device according to at least one of the preceding claims, characterized in that The supporting structure (13) is designed as a molded part, preferably as an injection-molded part or an extruded part.

15. The temperature control and exhaust device according to at least one of the preceding claims, characterized in that Plastic or aluminum or an aluminum alloy is provided as the material for the supporting structure ( 13 ).

16. The temperature control and exhaust device according to at least one of the preceding claims, characterized in that The supporting structure (13) is a profile structure, preferably a hollow profile structure.

17. An energy accumulator (3), in particular an energy accumulator for a vehicle, comprising a plurality of energy accumulator cells (2a, 2b, 2z) arranged next to one another and a temperature control and / or exhaust device, characterized in that: A temperature control and / or exhaust gas device according to at least one of claims 1 to 16 is provided.

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