Battery cell connector for energy storage device and energy storage device

Abstract

The invention relates to a cell connector (11a) for an energy store (3) for electrically contacting a first pole contact (22a) of a first energy store cell (2a) and a second pole contact (22b) of a second energy store cell (2b) of an energy store (3), in particular for a vehicle, comprising an electrically conductive base body (110), the base body is preferably made of a flat material, in particular sheet metal, having a constant layer thickness, having a first contact surface (112a) for electrically contacting the first pole contact (22a) and a second contact surface (112b) for electrically contacting the second pole contact (22b). According to the invention, the main body (110) is provided in the sub-region (110a) with a temperature control structure (12) which enlarges the surface of the battery cell connector (11a), preferably encapsulated by said temperature control structure.

Description

Technical Field

[0001] The invention relates to a battery cell connector according to the preamble of claim 1 and claim 2 and to an energy storage device, in particular for the automotive sector, using the battery cell connector according to the preamble of claim 22 . Background Art

[0002] The central point in the development of electrically driven vehicles, such as electric vehicles, is the energy storage. For this purpose, energy storage with high power and energy density is required. Energy storage usually consists of a plurality of individual energy storage cells (such as lithium-ion battery cells) that are electrically connected to each other. Energy storage usually requires temperature management to ensure that it operates within an optimized temperature range. Energy storage cells usually have a narrow operating temperature range (for example, between +15°C and +45°C). The functional safety, service life and cycle stability of the energy storage cells and therefore also the functional safety of the entire energy storage are essentially dependent on the energy storage cells not leaving this range. If the temperature exceeds a critical level, a so-called "thermal runaway" occurs. Thermal runaway triggers an unstoppable chain reaction. In this case, the temperature rises extremely within milliseconds and the energy stored in the energy storage cells is suddenly released. Temperatures of more than 1000°C can therefore be generated. The contents of the energy storage cells become gaseous and a fire occurs that is difficult to extinguish using conventional means. The risk of thermal runaway starts from a certain temperature (for example, 60°C) and becomes extremely critical from another temperature threshold (for example, 100°C). Therefore, an energy storage management system is used in energy storage devices, in particular energy storage devices for electric vehicles, with which not only the charging and discharging behavior of the energy storage battery cells is controlled or regulated, but also measures for temperature management and emergency management are taken in the event of thermal runaway. In order to ensure the targeted discharge of gas in the event of thermal runaway, the hermetically sealed energy storage battery cells can have a degassing opening. The degassing opening can be implemented, for example, as a rated breaking point, which allows the gas from the interior of the energy storage battery cell to escape into the environment from a specific internal pressure. The discharged gas may contain electrolytes that can react with water to form hydrofluoric acid. In order to reduce the risk to surrounding components and / or people, this gas must be discharged in a controlled and targeted manner.

[0003] In order to electrically connect the energy storage battery cells, the energy storage device has a so-called battery cell connector, which electrically connects two or more poles of two or more energy storage battery cells to each other according to the circuit type. In a series connection, for example, the anode of one energy storage battery cell is connected to the cathode of another energy storage battery cell. In order to be able to monitor and regulate the charge state of each energy storage battery cell, each battery cell connector can be electrically connected to the control and / or regulating electronics of the energy storage device. As a result, the battery cell voltage of each individual energy storage battery cell can be measured and the charge state of the corresponding energy storage battery cell can be derived via the battery cell voltage. In addition, a sensor, such as a temperature sensor for monitoring the surface temperature of the energy storage battery cell, can also be provided, which is connected to the control and / or regulating electronics. In current solutions, the control and / or regulating electronics are located in a separate component.

[0004] Prior art literature

[0005] DE102007063178A1 discloses a battery having a heat-conducting plate for temperature control of the battery. The battery comprises a plurality of single battery cells connected to one another. The heat-conducting plate has holes and / or cutouts in the region of the poles of the single battery cells, through which the poles of the single battery cells extend into or out. The heat-conducting plate is arranged between the single battery cells and contact elements placed on the poles. Electrical battery cell connectors and / or battery cell connector plates arranged pole by pole are provided as contact elements for electrically connecting the poles of the single battery cells. In addition, elastic elements and / or contact elements may be located on the upper side of the heat-conducting plate. The sequence of these individual layers must be clamped to the single battery cells via screws during installation. Therefore, installation is complicated.

[0006] DE102009046385A1 discloses a battery with a degassing system. The degassing system is located on the side opposite to the poles of the battery cells. There is a base plate specially provided for this purpose, which has a through-hole for the degassing opening and a collecting groove for collecting gas from the battery cells.

[0007] DE102012219784A1 discloses a battery module having a gas channel, a circuit board and a battery module housing for receiving a plurality of battery cells. The gas channel is formed by a U-shaped profile having a through opening leading to a degassing opening of the battery cell and a circuit board that closes the U-shaped profile on the side facing away from the degassing opening. The circuit board thus forms the wall of the gas channel and can come into direct contact with the gas when the gas is discharged from the gas discharge opening of the battery cell. During installation, the circuit board is fixed directly to the busbar. The U-shaped profile is not directly connected to the busbar. The disadvantage of this arrangement is that the discharged gas can damage the unprotected board. In this case, the control and / or regulation of the battery module is no longer guaranteed. In addition, no active temperature control of the battery cell surface or the battery cell connector is provided.

[0008] EP3316384A1 discloses a plate arrangement according to the preamble of claim 1. A rigid plate for control and / or regulating electronics is provided, on which a battery cell connector for connecting energy storage battery cells is directly arranged in a planar manner. Through this direct connection of the battery cell connector to the control and / or regulating electronics, direct heat transfer occurs from the electrical connections of the energy storage battery cells to the control and / or regulating electronics. Such an arrangement leads to unavoidable measurement deviations when measuring voltage and temperature. In addition, a C-shaped flexible circuit board carrying a temperature sensor element is fixed to the rigid plate. The flexible circuit board extends through a slit-shaped through-opening in the rigid plate. This construction is complex and expensive both in terms of the manufacture of the individual components and in terms of final installation. Summary of the invention

[0009] Mission of the present invention

[0010] The object of the above-mentioned invention is to provide a battery cell connector for an energy store having improved temperature control.

[0011] Solution to the task

[0012] This object is achieved by the entire teaching of claim 1 and claim 2 as well as claim 22. Advantageous embodiments of the invention are claimed in the dependent claims.

[0013] The present invention relates to a battery cell connector for an energy storage device, for electrically contacting a first pole contact of a first energy storage battery cell and a second pole contact of a second energy storage battery cell of an energy storage device, in particular an energy storage device for a vehicle, the battery cell connector comprising an electrically conductive base body, the base body preferably consisting of a flat material with a constant layer thickness, in particular a sheet material, having a first contact surface for electrically contacting the first pole contact and a second contact surface for electrically contacting the second pole contact. According to the invention, the base body is provided with a temperature regulating structure in a subregion which increases the surface of the battery cell connector, and is preferably encapsulated by the regulating structure. This ensures particularly good temperature control of the battery cell connector.

[0014] The invention also relates to a cell connector for an energy storage device, for electrically contacting the pole contacts of the first or last energy storage cell of an energy storage device, in particular an energy storage device for a vehicle, the cell connector comprising an electrically conductive base body and a current tap, the base body preferably consisting of a flat material with a constant layer thickness, in particular a sheet material, having a contact surface for electrically contacting the pole contacts. According to the invention, the base body is provided with a temperature regulating structure in a subregion which increases the surface of the cell connector, and is preferably encapsulated by the regulating structure. This ensures particularly good temperature control of the cell connector.

[0015] Advantageously, the base body can have a first side and a second side, and the temperature control structure can extend along the entire length of the first side. This embodiment is advantageous if the battery cell connector has no current tap.

[0016] Expediently, the base body can have a first side and a second side, and the temperature control structure can extend only along the length of the first side in the region of the first contact surface. This embodiment is advantageous if the battery cell connector has a current tap.

[0017] The first side of the main body extends in the contact-making direction of the energy storage cell.

[0018] Furthermore, the first and second contact surfaces can be separated from one another by at least one recess. This design is advantageous if the cell connector does not have a current tap. The cell connector can have a certain elasticity due to the recess. When the first and second contact surfaces are connected to the energy storage battery cells, relative movements of the energy storage battery cells with respect to one another can thereby be compensated. Furthermore, current can be transferred through the recess in the direction of the encapsulated injection-molded sub-region.

[0019] In a suitable embodiment, the temperature control structure can include a plurality of temperature control ribs, temperature control projections, temperature control pins and / or temperature control strips, thereby enabling particularly effective temperature control and / or flow of the temperature control fluid around the temperature control structure.

[0020] For this purpose, the temperature control ribs, temperature control cams, temperature control pins and / or temperature control webs can expediently be arranged in a row with one another, parallel to one another and / or equidistant from one another.

[0021] Since the temperature control structure consists of a thermally conductive, electrically insulating material, in particular a thermally conductive, electrically insulating plastic, a particularly good heat transfer and electrical insulation of the battery cell connector is achieved.

[0022] For additional temperature control of the surface of the energy storage cell, a contact element having a contact surface for contacting the surface of the energy storage cell can be provided and can be connected to the temperature control structure.

[0023] In an advantageous embodiment, the contact element can be a component of the temperature control structure.

[0024] In an alternative embodiment, the contact element can be a contact plate, preferably made of a sheet metal.

[0025] There can be a gap between the contact plate and the base body, and the temperature control structure can connect the base body and the contact plate to each other in the region of the gap. The contact plate and the base body can be electrically separated from each other via the gap.

[0026] Since the first and / or second contact surfaces and the contact surfaces of the contact element are positioned at a height offset relative to one another, thermal and electrical contacting of the first and / or second contact surfaces to the pole contacts of the energy storage cell and thermal contacting of the contact element to the surface of the energy storage cell are possible.

[0027] The height offset can expediently be produced by at least one bend in the contact element.

[0028] Advantageously, the at least one bending portion may be arranged on both sides of the temperature control structure.

[0029] It is particularly expedient if the base body and the contact element are punched or cut parts, preferably laser cut parts, formed from a common sheet metal blank. This allows the base body and the contact element to be manufactured particularly advantageously without generating waste during the manufacture of the contact element.

[0030] In a further advantageous embodiment, the contact element can extend as far as at least one degassing opening of the first and / or second and / or last energy storage cell, preferably as far as the degassing openings of the first and second energy storage cell, preferably at least partially surround the degassing openings.

[0031] Furthermore, the contact element can partially or completely surround the energy storage cell via the pole contacts.

[0032] The temperature control structure can expediently form an interface to a heat control system.

[0033] In an advantageous embodiment, the heat regulation system can have at least one temperature control channel, in which the temperature control structure of the battery cell connector can be positioned.

[0034] In a particularly advantageous embodiment, the electrically conductive base body can consist of a preferably plate-shaped flat material with a constant layer thickness or of a curved flat material with a constant layer thickness or of a material with a variable layer thickness, in particular a curved material with a variable layer thickness.

[0035] Furthermore, the invention relates to an energy store, in particular for a vehicle, having a plurality of energy store cells arranged in a row with one another, wherein a cell connector according to at least one of claims 1 to 21 is provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Description of the invention with the aid of exemplary embodiments

[0037] The purposeful design of the present invention is explained in more detail below with the aid of the accompanying drawings. In the accompanying drawings:

[0038] Figure 1a A top view of an energy storage device with a battery cell connector is shown with the temperature control structure omitted;

[0039] Figure 1b A perspective view showing the energy storage device with a battery cell connector of FIG. 1 with the temperature control structure omitted;

[0040] Figure 2a A perspective view showing the battery cell connector of FIG. 1 with a temperature regulating structure;

[0041] Figure 2b A perspective view showing the joint-side battery cell connector of FIG. 1 with a temperature regulating structure;

[0042] Figure 3a A perspective view showing another design of a temperature control structure of a battery cell connector;

[0043] Figure 3b A perspective view showing another design of a temperature control structure of a battery cell connector;

[0044] Figure 3c A perspective view showing another design of a temperature control structure of a battery cell connector;

[0045] Figure 3d A perspective view showing another design of a temperature control structure of a battery cell connector;

[0046] Figure 4a A perspective view showing another design of a battery cell connector;

[0047] Figure 4b Show according to Figure 4a A side view of a battery cell connector;

[0048] Figure 5a A perspective view showing another design of a battery cell connector;

[0049] Figure 5b Show according to Figure 5a A side view of a battery cell connector;

[0050] Figure 6a A perspective view showing another design of a battery cell connector; and

[0051] Figure 6b Show according to Figure 6a A perspective view of a battery cell connector without a temperature control structure. DETAILED DESCRIPTION

[0052] 1 shows an energy storage device 3 as a whole. In this case, it is in particular a battery for an electric vehicle with an electric drive, for example. The energy storage device has a plurality of energy storage cell cells 2a, 2b, 2z arranged in a row with one another.

[0053] Energy storage cells 2a, 2b, 2z each have two pole contacts 22a, 22b, covered by cell connectors 11a, 11b in Figure 1, namely pole contact 22a for the anode and pole contact 22b for the cathode. Pole contacts 22a, 22b can have a substantially flat surface or can be designed as plates.

[0054] FIG. 1 further shows control and / or regulating electronics 16 , which are electrically connected to the cell connectors 11 a , 11 b via connecting elements 15 .

[0055] The battery cell connectors 11a, 11b can be welded to the pole contacts 22a, 22b, for example. In addition, the battery cell connectors 11a, 11b can have through-openings 111. These through-openings can be used for positioning when the battery cell connectors 11a, 11b are fixed to the pole contacts 22a, 22b. In addition, the through-openings 111 can be used as inspection openings. If necessary, for example, a measuring line can be placed through the through-openings 111 at the threaded holes on the pole contacts 22a, 22b located below the through-openings. This can, for example, check the contact between the battery cell connectors 11a, 11b and the pole contacts 22a, 22b.

[0056] In the embodiment, for example, fourteen energy storage cells 2a, 2b, 2z are shown, which are electrically connected to each other in a series connection via cell connectors 11a, 11b. To this end, the energy storage cells 2a, 2b, 2z are arranged in a rotation relative to each other so that the pole contact 22a of the anode of the energy storage cell 2a and the pole contact 22b of the cathode of the adjacent energy storage cell 2b are opposite or the pole contact 22b of the cathode of the energy storage cell 2b and the pole contact 22a of the anode of the adjacent energy storage cell 2a are opposite. The pole contact 22b of the cathode of the first energy storage cell 2a is connected to the cell connector 11b 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 it 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 consumer (not shown), for example, an electric motor of an electric vehicle. The two cell connectors 11b thus form the energy storage connection, i.e. the cathode and anode of the entire energy storage 3.

[0057] In alternative designs of the energy storage device 3, a different number of energy storage cells can also be provided and / or the energy storage cells can be connected in parallel. For this purpose, the cell connectors 11a, 11b can, for example, connect the electrical connections 22a of the anodes of two or more energy storage cells or the electrical connections 22b of the cathodes of two or more energy storage cells to one another. The energy storage cells can also be arranged in a row with the same orientation, i.e., not rotated, so that the electrical connections of the cathodes of the energy storage cells of the energy storage device 3 are arranged along a first line and the electrical connections of the anodes of the energy storage cells are arranged along a second line extending parallel to the first line.

[0058] Figure 2a and 2b The cell connectors 11a, 11b are shown for electrically connecting the pole contacts 22a, 22b of the energy storage cell 2a, 2a, 2z to the temperature control structure 12. Figure 1a and 1b In the embodiment of FIG. 1 , two terminal battery cell connectors 11 b and thirteen battery cell connectors 11 a are shown.

[0059] The cell connector 11a is provided for electrically connecting a pole contact 22a of an energy storage cell, such as 2a, to a pole contact 22b of an adjacent energy storage cell, such as 2b. For this purpose, the cell connector 11a has a base body 110 having a first contact surface 112a and a second contact surface 112b, which are each connected, for example welded, to one pole contact 22a, 22b.

[0060] The two cell connectors 11b are provided for providing contact means with an electrical consumer (not shown), such as an electric motor of an electric vehicle or an adjacent energy storage device, on the first energy storage cell 2a and the last energy storage cell 2z. The cell connector 11b comprises 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 to the anode pole contact 22a of the last energy storage cell 2z. The base body 113 also has a current tap 110d. The current taps 110d of the two cell connectors 11b thus form the connection of the anode and cathode of the energy storage device 3.

[0061] The base bodies 110, 113 of the battery cell connectors 11a, 11b are made of an electrically conductive flat material, such as a sheet metal, with a preferably constant layer thickness. The respective base bodies 110, 113 have a first side S1, S1' and a second side S2, S2' and in each case in the region of the second side S2, S2' Figure 2a and 2b The covered sub-region 110a is encapsulated by a temperature control structure 12 which increases the surface of the battery cell connectors 11a, 11b. The temperature control structure 12 has, for example, a plurality of temperature control ribs 124a extending parallel to one another.

[0062] In an alternative embodiment not shown, the base body 110 , 113 can consist of a curved flat material with a constant layer thickness or of a material with a varying layer thickness, for example of a curved material with a varying layer thickness.

[0063] The temperature control structure 12 is preferably a thermally conductive, electrically insulating material, in particular a plastic.

[0064] In the case of the cell connector 11a, the temperature control structure 12 extends along the entire length L1 of the first side S1. In the case of 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.

[0065] 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 dissipated via the recess to the subregion 110a overmolded by the temperature control structure 12. On the other hand, the base body 110 thus has a greater 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.

[0066] Furthermore, the base bodies 110 , 113 of the battery cell connectors 11a , 11b can have recesses 115 in the form of, for example, half-moon-shaped through-openings. These recesses also increase the elasticity of the base bodies 110 , 113 .

[0067] Figure 3a to Figure 3d Different embodiments of the temperature control structure 12 are shown. A temperature control bellows 124b, a temperature control projection 124c, a temperature control pin 124d or a temperature control web 124e may be provided as the temperature control structure.

[0068] Figure 4a , 4b , 5a, 5b, 6a, 6b show alternative designs of the cell connector 11a, in which additional contact elements 121a, 121b, 121c are provided, which are in direct contact with the upper side 23 of the energy storage cell via contact surfaces 122a, 122b, 122c. As a result, the energy storage cell 2a, 2b, 2z can be temperature-controlled.

[0069] Figure 4a and Figure 4b 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 on the surface of the energy storage cell or bridges the height of the pole contact 22a, see Figure 4b .

[0070] Figure 5a and Figure 5b as well as Figure 6a and Figure 6b Two further alternative embodiments of a battery cell connector 11 a with contact elements 121 b , 121 c , for example contact sheets, are shown.

[0071] according to Figure 5a and Figure 5b, 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 relative to the upper side 23. As a result, the base body 110 and the contact element 121b can be connected to each other, for example, on a plane, whereby the contact element 121b is directly attached to the upper side of the energy storage battery cell. 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 are not in direct contact with each other. The base body 110 and the contact element 121b are connected to each other via 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 made of the same material as the base body 110.

[0072] Figure 6a and Figure 6b The variant has an additional offset 127b between the two contact surfaces 112a, 112b. The contact element 121c extends all the way to the degassing opening 21 and surrounds the pole contacts 22a, 22b of the energy storage battery cells 2a, 2b. Due to the additional offset 127b, the heat conduction between the contact element 121c and the temperature control structure 12 and the mechanical stability of the battery cell connector 11a can be additionally increased.

[0073] The offsets 127a, 127b can be produced, for example, by two bends of a plate-shaped raw material, for example a sheet material. Figure 6b It can be seen that the temperature control structure is omitted for illustration reasons.

[0074] The base body 110 and the contact elements 121 b , 121 c can advantageously be produced, for example cut or punched, from a common sheet-metal blank.

[0075] Corresponding contact elements can also be provided in the end-side cell connector 11 b. The geometry of the contact elements for the cell connector 11 b can be adapted in a simple manner to the geometry of the cell connector 11 b.

[0076] The battery cell connectors 11a, 11b or the temperature control structure 12 may also have an interface with a heat control system, for example a temperature control channel (not shown) and be connected thereto, preferably in the region of the temperature control structure 12, for example welded or adhesively bonded. In order to connect to the battery cell connectors 11a, 11b, the temperature control channel may, for example, have a through-opening into which the battery cell connectors 11a, 11b and / or the temperature control structure 12 may be inserted. The interface with the heat control system may, for example, be arranged on the temperature control structure 12. The interface may, for example, be designed so that the interface may close the through-opening of the temperature control channel. The temperature control channel may, for example, be arranged to receive and / or conduct a temperature control fluid, for example a temperature control liquid.

[0077] Alternatively, the cell connectors 11a, 11b can also be used without a temperature control channel. In this case, for example, the ambient air can be used for temperature control.

[0078] Reference numerals list

[0079] 2a First energy storage battery cell

[0080] 2b Second energy storage battery cell

[0081] 2z The last energy storage battery cell

[0082] 3 Energy storage device

[0083] 11a battery cell connector

[0084] 11b battery cell connector

[0085] 111 through opening

[0086] 110 base

[0087] 113 matrix

[0088] Sub-area 110a

[0089] 110d current tap

[0090] 112a contact surface

[0091] 112b contact surface

[0092] 12 Temperature control structure

[0093] 121a Contact element

[0094] 121b contact element

[0095] 121c contact element

[0096] 122a contact surface

[0097] 122b contact surface

[0098] 122c contact surface

[0099] 124a Temperature regulating rib

[0100] 124b Temperature regulating corrugated structure

[0101] 124c temperature control bump

[0102] 124d temperature control pin

[0103] 124e temperature control connector

[0104] 127a offset

[0105] 127b offset

[0106] 129a Gap

[0107] 129b gap

[0108] 15 Connecting elements

[0109] 16 Control and / or regulation electronics

[0110] 21 Degassing opening

[0111] 22a pole contact

[0112] 22b pole contact

[0113] 23 upper side

Claims

1. A cell connector (11a) for an energy storage device (3), for electrically contacting a first pole contact (22a) of a first energy storage cell (2a) and a second pole contact (22b) of a second energy storage cell (2b) of an energy storage device (3), in particular an energy storage device for a vehicle, the cell connector comprising an electrically conductive base body (110), the base body having a first contact surface (112a) for electrically contacting the first pole contact (22a) and a second contact surface (112b) for electrically contacting the second pole contact (22b), characterized in that: The base body (110) is provided with a temperature control structure (12) in a subregion (110a) which increases the surface of the battery cell connector (11a) and is preferably encapsulated by the temperature control structure.

2. A cell connector (11b) for an energy storage device (3), for electrically contacting pole contacts (22a, 22b) of an energy storage device cell (2a, 2z) of an energy storage device (3), in particular an energy storage device for a vehicle, the cell connector comprising an electrically conductive base body (113) and a current tap (110d), the base body having a contact surface (112a) for electrically contacting the pole contacts (22a, 22b), characterized in that: The base body (113) is provided with a temperature control structure (12) in a subregion (110a) which increases the surface of the battery cell connector (11b) and is preferably encapsulated by the temperature control structure.

3. The battery cell connector (11a) according to claim 1, characterized in that: The base body (110) has a first side (S1) and a second side (S2), and the temperature control structure (12) extends along the entire length (L1) of the first side (S1).

4. The battery cell connector (11b) according to claim 2, characterized in that: The base body (113) has a first side (S1') and a second side (S2'), and the temperature control structure (12) extends only along a length (L2) of the first side (S1) in the region of the first contact surface (112a).

5. The battery cell connector (11a, 11b) according to at least one of the preceding claims, characterized in that A first side (S1, S1') of the base body (110, 113) extends in a contact-making direction of the energy storage cell (2a, 2b, 2z).

6. The battery cell connector (11a) according to at least one of claims 1, 3 or 5, characterized in that: The first and second contact surfaces (112a, 112b) are separated from each other by at least one recess (114).

7. The battery cell connector (11a, 11b) according to at least one of the preceding claims, characterized in that The temperature control structure (12) comprises a plurality of temperature control ribs (124a), in particular corrugated temperature control ribs (124b), temperature control cams (124c), temperature control pins (124d) and / or temperature control webs (124e).

8. The battery cell connector (11a, 11b) according to claim 7, characterized in that: The temperature control ribs (124a), the temperature control cams (124c), the temperature control pins (124d) and / or the temperature control webs (124e) are arranged in a row, parallel to each other and / or equidistant from each other.

9. The battery cell connector (11a, 11b) according to at least one of the preceding claims, characterized in that The temperature control structure (12) consists of a thermally conductive, electrically insulating material, in particular a thermally conductive, electrically insulating plastic.

10. The battery cell connector (11a, 11b) according to at least one of the preceding claims, characterized in that Contact elements (121a, 121b, 121c) are provided, which have contact surfaces (122a, 122b, 122c) for contacting surfaces of energy storage battery cells (2a, 2b, 2z), and the contact elements (121a, 121b, 121c) are connected to a temperature control structure (12).

11. The battery cell connector (11a, 11b) according to claim 10, characterized in that: The contact element (121a) is a component of the temperature control structure (12).

12. The battery cell connector (11a, 11b) according to claim 10, characterized in that: The contact elements ( 121 b , 121 c ) are contact plates, preferably made of sheet metal.

13. The battery cell connector (11a, 11b) according to claim 10 or 12, characterized in that: A gap (129a, 129b) exists between the contact element (121b, 121c) and the base body (110, 113), and the temperature control structure (12) connects the base body (110, 113) and the contact element (121b, 121c) to each other in the region of the gap (129a, 129b).

14. The battery cell connector (11a, 11b) according to at least one of claims 10 to 13, characterized in that The first and / or second contact surface (112a, 112b) and the contact surface (122a, 122b, 122c) of the contact element (121a, 121b, 121c) are positioned with a height offset relative to one another.

15. The battery cell connector (11a, 11b) according to at least one of claims 10 or 12 to 14, characterized in that The height offset is formed by at least one bend (127a, 127b) of the contact element (121b, 121c).

16. The battery cell connector (11a, 11b) according to claim 15, characterized in that: The at least one bending portion (127a, 127b) is arranged on both sides of the temperature adjustment structure.

17. The battery cell connector (11a, 11b) according to at least one of claims 10 or 12 to 15, characterized in that The base body (110, 113) and the contact element (122b, 122c) are punched or cut parts, preferably laser cut parts, from a common plate-shaped blank.

18. The battery cell connector (11a, 11b) according to at least one of claims 10 to 17, characterized in that The contact element (122a, 122b, 122c) extends to at least one degassing opening (21) of the first and / or second and / or last energy storage cell (2a, 2b, 2z), preferably to the degassing opening (21) of the first and / or second energy storage cell (2a, 2b, 2z), preferably at least partially surrounding the degassing opening.

19. The battery cell connector (11a, 11b) according to at least one of the preceding claims, characterized in that The temperature control structure (12) forms an interface with the thermal regulation system.

20. The battery cell connector (11a, 11b) according to claim 19, characterized in that: The heat regulating system has at least one temperature regulating channel, in which the temperature regulating structure (12) of the battery cell connector (11a, 11b) is positioned.

21. The battery cell connector (11a, 11b) according to at least one of the preceding claims, characterized in that The electrically conductive base body (110, 113) consists of a preferably plate-shaped flat material with a constant layer thickness or a curved flat material with a constant layer thickness or a material with a variable layer thickness, in particular a curved material with a variable layer thickness.

22. Energy storage device (3), in particular for a vehicle, comprising a plurality of energy storage battery cells (2a, 2b, 2z) arranged in a row with one another, characterized in that A battery cell connector (11a, 11b) according to at least one of claims 1 to 21 is provided.

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